sshfs-fuse-2.5/0000755000175000001440000000000012265244116010446 500000000000000sshfs-fuse-2.5/sshnodelay.c0000644000175000001440000000075212104163355012704 00000000000000#define _GNU_SOURCE #include #include #include #include #include int connect(int sock, const struct sockaddr *addr, socklen_t addrlen) { int (*next_connect)(int, const struct sockaddr *, socklen_t) = dlsym(RTLD_NEXT, "connect"); int res = next_connect(sock, addr, addrlen); if (!res && addr->sa_family == AF_INET) { int opt = 1; setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt)); } return res; } sshfs-fuse-2.5/FAQ.txt0000644000175000001440000002465212265244046011551 00000000000000See http://sourceforge.net/apps/mediawiki/fuse/index.php?title=SshfsFaq for the latest version of this FAQ --- 1. I've found a bug and there's no solution in this FAQ, what should I do? 2. Why do permissions in nautilus not work! 3. Advantage of sshfs over NFS and Samba 4. Create the device node 5. =mv= fails with _"Operation not permitted"_. 6. cvs fails with "cvs [status aborted]: cannot get working directory: No such file or directory" in a sshfs mounted directory 7. Changes on the server are not immediately visible in the mounted directory. 8. Configuring the ssh connection 9. What are the =no_readahead= and =sshfs_sync= options for? 10. Why does =df= return strange values on partitions mounted via sshfs? 11. How do I specfy the remote mount point (since the example defaults to the home directory) 12. sshfs hangs after a while 13. Following symlinks on the server side 14. Making absolute symlinks work 15. Mounting as root 16. Exporting via NFS 17. Automatical mounting using /etc/fstab 18. Why does SVN (etc...) fail with permission denied? 19. Why does SVN (etc...) fail to rename files? 20. Is there some neat way to do it in reverse? 21. Might it be reasonable to disallow loops? 22. How to mount through an intermediary ssh server, eg: localhost -> A -> B; mount B from localhost 23. Alternative Solution: 24. I seem to have successfully mounted a remote directory, but performing an `ls -l` on the directory above the mount point shows the mount point's attributes as `? ? ? ? ? ?`. Nothing shows up in the directory either. What am I doing wrong? 25. What options do i use to make playing media files (music) over sshfs more efficient? 26. MacFUSE doesn't seem to let me move files from one directory to another. It first asks for my local user password (i.e. the password on my Macbook Pro) and then produces the error message "The operation cannot be completed because one or more required items cannot be found. (Error code -120). 27. How can I get procmail to open, read and write to remote directories over sshfs? (To sign in, put two capitalized words together: MyName) I've found a bug and there's no solution in this FAQ, what should I do? Please send the bug report to . Also logs with debugging output can be useful for diagnosing the problem. Try running sshfs with the following options: sshfs -odebug,sshfs_debug,loglevel=debug ... Doing strace on the application which fails may also sometimes help: strace -f -o /tmp/strace application args ... Note that large messages (over 40k) will be rejected from the mailing list. So try to keep the logs as short as possible. Why do permissions in nautilus not work! Unanswered. Advantage of sshfs over NFS and Samba Users can mount remote resources they already have ssh access to, without requiring the remote machine to export the resource. The remote resource can be mounted when it is needed in a location that is convenient for the user at that time, without needing to rely on a central, root-controlled file system table. Automatic mounting, if desired, can be added to a shell script such as .bashrc (provided authentication is done using RSA/DSA keys). Resources can be mounted over slow and unreliable (distant) connections. Create the device node If you don't use udev, you may get this error message: fusermount: failed to open /dev/fuse: No such device or address Before loading the fuse kernel module, create the device node manually: mknod -m 666 /dev/fuse c 10 229 mv fails with "Operation not permitted". Use -o workaround=rename (requires sshfs version >= 1.3). cvs fails with "cvs status aborted?: cannot get working directory: No such file or directory" in a sshfs mounted directory Use the -oreaddir_ino option. Example: sshfs -oreaddir_ino hostname:remote_dir mount_point Changes on the server are not immediately visible in the mounted directory. By default, sshfs caches things for 20 seconds, use -o cache_timeout=N to change the default cache timeout (in seconds) or -o cache=no for disabling the cache. You can also control cache timeouts for directory listing etc with -o cache_stat_timeout=N, -o cache_dir_timout=N, and -o cache_link_timout=N. Configuring the ssh connection In addition to flags like -C, -p, and -o SSHOPT...=, you may find it easier to edit your /.ssh/config file. You can add an entry with any customization you want, test it with ssh, and finally use it with sshfs. As a bonus, you get a short mnemonic for your configuration. What are the no_readahead and sshfs_sync options for? These disable read and write optimizations respectively. They don't really make sense unless you're doing something special. Why does df return strange values on partitions mounted via sshfs? Because the SFTP protocol doesn't have a statfs operation this is currently not possible to display proper usage on remote partition. How do I specfy the remote mount point (since the example defaults to the home directory) The example shows: sshfs hostname: mountpoint To specify a remote mount point use: sshfs hostname:remotemountpoint mountpoint This might be obvious to others, but I ended up looking up the interface to sftp to see if I could learn how to specify the remote mount point, then thought about the way that scp specifies the remote directory, and it worked. sshfs hangs after a while Mounting works fine, I can use the files in Mountpoint as good as any other files on my system, but after bit of time, changing nothing on the remote files sshfs crashes. This means, I can not cd into the Mountpoint (xterm hangs, nautilus hangs... every program trying to access the Mountpoint gets stuck, and won't return). Solution: add ServerAliveInterval 15 in your .ssh/config (or use -o ServerAliveInterval=15 on the sshfs command line but I did not test that solution). This will force the ssh connection to stay alive even if you have no activity. Following symlinks on the server side The -o follow_symlinks option will enable this. Making absolute symlinks work Use the -o transform_symlinks option, which will transform absolute symlinks (ones which point somewhere inside the mount) into relative ones. Mounting as root Generally it's not possible to use an sshfs mount as a "real" filesystem shared between multiple users. Some of this functionality can be enabled with the -o allow_other and -o default_permissions options, but files will not be created with the correct ownership, etc... Exporting via NFS Use the userspace NFS daemon http://sourceforge.net/projects/unfs Automatical mounting using /etc/fstab A line in /etc/fstab has the following format: sshfs#USERNAME@REMOTE_HOST:REMOTE_PATH MOUNT_POINT fuse SSHFS_OPTIONS 0 0 e.g. sshfs#guest@guest.login.com:data /mnt/guest fuse uid=1003,gid=100,umask=0,allow _other 0 0 Why does SVN (etc...) fail with permission denied? This is a bug that happens when an application creates a read-only file opened for writing (e.g. open("foo", O_WRONLY|O_CREAT, 0444)) It has been fixed in sshfs version 1.3, but also requires FUSE version >=2.5.X and Linux kernel version >=2.6.15. Why does SVN (etc...) fail to rename files? $ svn co svn://anonsvn.kde.org/home/kde/trunk/KDE/kdelibs svn: Can't move 'kdelibs/.svn/tmp/entries' to 'kdelibs/.svn/entries': Operation not permitted The reason is that SFTP protocol version 3 (which is implemented by OpenSSH's sftp-server) defines the rename operation slightly differently than POSIX. The difference is that renaming to an existing file or directory will fail instead of atomically replacing the old file. The -o workaround=rename option will try to emulate POSIX rename semantics, but it cannot guarantee atomicity. In most of the cases this doesn't matter, and things will work fine with this option. Is there some neat way to do it in reverse? You want to mount a USB thumb drive onto a file server that is rather remote. Assuming this is difficult because the laptop with the thumb drive is sitting behind NAT, firewalls, etc. then you need to create a port-forward: client$ ssh -R 2222:localhost:22 server server$ sshfs -p 2222 localhost:/media/usb1 myusb1 (Now, is there is there a smarter way that does not involve port opening login permissions in an undesireable direction?) Might it be reasonable to disallow loops? sshfs localhost:/mnt /mnt This seems to produce undesirable results. --JoshuaRodman? How to mount through an intermediary ssh server, eg: localhost -> A -> B; mount B from localhost Start by mounting the folder you need that is on "a" to a folder on "b" then mount the new folder that is on "a" to a folder on localhost. IE: (These are NOT real commands, but a sequence of steps. 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Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. This file is offered as-is, without warranty of any kind. Basic Installation ================== Briefly, the shell commands `./configure; make; make install' should configure, build, and install this package. The following more-detailed instructions are generic; see the `README' file for instructions specific to this package. Some packages provide this `INSTALL' file but do not implement all of the features documented below. The lack of an optional feature in a given package is not necessarily a bug. More recommendations for GNU packages can be found in *note Makefile Conventions: (standards)Makefile Conventions. The `configure' shell script attempts to guess correct values for various system-dependent variables used during compilation. It uses those values to create a `Makefile' in each directory of the package. It may also create one or more `.h' files containing system-dependent definitions. Finally, it creates a shell script `config.status' that you can run in the future to recreate the current configuration, and a file `config.log' containing compiler output (useful mainly for debugging `configure'). It can also use an optional file (typically called `config.cache' and enabled with `--cache-file=config.cache' or simply `-C') that saves the results of its tests to speed up reconfiguring. Caching is disabled by default to prevent problems with accidental use of stale cache files. If you need to do unusual things to compile the package, please try to figure out how `configure' could check whether to do them, and mail diffs or instructions to the address given in the `README' so they can be considered for the next release. If you are using the cache, and at some point `config.cache' contains results you don't want to keep, you may remove or edit it. The file `configure.ac' (or `configure.in') is used to create `configure' by a program called `autoconf'. You need `configure.ac' if you want to change it or regenerate `configure' using a newer version of `autoconf'. The simplest way to compile this package is: 1. `cd' to the directory containing the package's source code and type `./configure' to configure the package for your system. Running `configure' might take a while. While running, it prints some messages telling which features it is checking for. 2. Type `make' to compile the package. 3. Optionally, type `make check' to run any self-tests that come with the package, generally using the just-built uninstalled binaries. 4. Type `make install' to install the programs and any data files and documentation. When installing into a prefix owned by root, it is recommended that the package be configured and built as a regular user, and only the `make install' phase executed with root privileges. 5. 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On MacOS X 10.5 and later systems, you can create libraries and executables that work on multiple system types--known as "fat" or "universal" binaries--by specifying multiple `-arch' options to the compiler but only a single `-arch' option to the preprocessor. Like this: ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \ CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \ CPP="gcc -E" CXXCPP="g++ -E" This is not guaranteed to produce working output in all cases, you may have to build one architecture at a time and combine the results using the `lipo' tool if you have problems. Installation Names ================== By default, `make install' installs the package's commands under `/usr/local/bin', include files under `/usr/local/include', etc. You can specify an installation prefix other than `/usr/local' by giving `configure' the option `--prefix=PREFIX', where PREFIX must be an absolute file name. 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Some packages pay attention to `--enable-FEATURE' options to `configure', where FEATURE indicates an optional part of the package. They may also pay attention to `--with-PACKAGE' options, where PACKAGE is something like `gnu-as' or `x' (for the X Window System). The `README' should mention any `--enable-' and `--with-' options that the package recognizes. For packages that use the X Window System, `configure' can usually find the X include and library files automatically, but if it doesn't, you can use the `configure' options `--x-includes=DIR' and `--x-libraries=DIR' to specify their locations. Some packages offer the ability to configure how verbose the execution of `make' will be. For these packages, running `./configure --enable-silent-rules' sets the default to minimal output, which can be overridden with `make V=1'; while running `./configure --disable-silent-rules' sets the default to verbose, which can be overridden with `make V=0'. 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So, if you need `/usr/ucb' in your `PATH', put it _after_ `/usr/bin'. On Haiku, software installed for all users goes in `/boot/common', not `/usr/local'. It is recommended to use the following options: ./configure --prefix=/boot/common Specifying the System Type ========================== There may be some features `configure' cannot figure out automatically, but needs to determine by the type of machine the package will run on. Usually, assuming the package is built to be run on the _same_ architectures, `configure' can figure that out, but if it prints a message saying it cannot guess the machine type, give it the `--build=TYPE' option. TYPE can either be a short name for the system type, such as `sun4', or a canonical name which has the form: CPU-COMPANY-SYSTEM where SYSTEM can have one of these forms: OS KERNEL-OS See the file `config.sub' for the possible values of each field. 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Until the limitation is lifted, you can use this workaround: CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash `configure' Invocation ====================== `configure' recognizes the following options to control how it operates. `--help' `-h' Print a summary of all of the options to `configure', and exit. `--help=short' `--help=recursive' Print a summary of the options unique to this package's `configure', and exit. The `short' variant lists options used only in the top level, while the `recursive' variant lists options also present in any nested packages. `--version' `-V' Print the version of Autoconf used to generate the `configure' script, and exit. `--cache-file=FILE' Enable the cache: use and save the results of the tests in FILE, traditionally `config.cache'. FILE defaults to `/dev/null' to disable caching. `--config-cache' `-C' Alias for `--cache-file=config.cache'. `--quiet' `--silent' `-q' Do not print messages saying which checks are being made. 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We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. sshfs-fuse-2.5/sshfs.10000644000175000001440000001405212263270034011574 00000000000000.TH SSHFS "1" "April 2008" "SSHFS version 2.0" "User Commands" .SH NAME SSHFS \- filesystem client based on ssh .SH SYNOPSIS .SS mounting .TP \fBsshfs\fP [\fIuser\fP@]\fBhost\fP:[\fIdir\fP] \fBmountpoint\fP [\fIoptions\fP] .SS unmounting .TP \fBfusermount -u mountpoint\fP .SH DESCRIPTION SSHFS (Secure SHell FileSystem) is a file system for Linux (and other operating systems with a FUSE implementation, such as Mac OS X or FreeBSD) capable of operating on files on a remote computer using just a secure shell login on the remote computer. On the local computer where the SSHFS is mounted, the implementation makes use of the FUSE (Filesystem in Userspace) kernel module. The practical effect of this is that the end user can seamlessly interact with remote files being securely served over SSH just as if they were local files on his/her computer. On the remote computer the SFTP subsystem of SSH is used. .PP If \fIhost\fP is a numeric IPv6 address, it needs to be enclosed in square brackets. .SH OPTIONS .SS "general options:" .TP \fB\-o\fR opt,[opt...] mount options .TP \fB\-h\fR \fB\-\-help\fR print help .TP \fB\-V\fR \fB\-\-version\fR print version .SS "SSHFS options:" .TP \fB\-p\fR PORT equivalent to '\-o port=PORT' .TP \fB\-C\fR equivalent to '\-o compression=yes' .TP \fB\-F\fR ssh_configfile specifies alternative ssh configuration file .TP \fB\-1\fR equivalent to '\-o ssh_protocol=1' .TP \fB\-o\fR reconnect reconnect to server .TP \fB\-o\fR delay_connect delay connection to server .TP \fB\-o\fR sshfs_sync synchronous writes .TP \fB\-o\fR no_readahead synchronous reads (no speculative readahead) .TP \fB\-o\fR sync_readdir synchronous readdir .TP \fB\-o\fR sshfs_debug print some debugging information .TP \fB\-o\fR cache=BOOL enable caching {yes,no} (default: yes) .TP \fB\-o\fR cache_timeout=N sets timeout for caches in seconds (default: 20) .TP \fB\-o\fR cache_X_timeout=N sets timeout for {stat,dir,link} cache .TP \fB\-o\fR workaround=LIST colon separated list of workarounds .RS 8 .TP none no workarounds enabled .TP all all workarounds enabled .TP [no]rename fix renaming to existing file (default: off) .TP [no]nodelaysrv set nodelay tcp flag in ssh (default: off) .TP [no]truncate fix truncate for old servers (default: off) .TP [no]buflimit fix buffer fillup bug in server (default: on) .RE .TP \fB\-o\fR idmap=TYPE user/group ID mapping, possible types are: .RS 8 .TP none no translation of the ID space (default) .TP user only translate UID of connecting user .TP file translate UIDs/GIDs based upon the contents of \fBuidfile \fR and \fBgidfile\fR .RE .TP \fB\-o\fR uidfile=FILE file containing username:uid mappings for \fBidmap=file\fR .RE .TP \fB\-o\fR gidfile=FILE file containing groupname:gid mappings for \fBidmap=file\fR .RE .TP \fB\-o\fR nomap=TYPE with idmap=file, how to handle missing mappings .RS 8 .TP ignore don't do any re-mapping .TP error return an error (default) .RE .TP \fB\-o\fR ssh_command=CMD execute CMD instead of 'ssh' .TP \fB\-o\fR ssh_protocol=N ssh protocol to use (default: 2) .TP \fB\-o\fR sftp_server=SERV path to sftp server or subsystem (default: sftp) .TP \fB\-o\fR directport=PORT directly connect to PORT bypassing ssh .TP \fB\-o\fR slave communicate over stdin and stdout bypassing network .TP \fB\-o\fR disable_hardlink link(2) will return with errno set to ENOSYS. Hard links don't currently work perfectly on sshfs, and this confuses some programs. If that happens try disabling hard links with this option. .TP \fB\-o\fR transform_symlinks transform absolute symlinks to relative .TP \fB\-o\fR follow_symlinks follow symlinks on the server .TP \fB\-o\fR no_check_root don't check for existence of 'dir' on server .TP \fB\-o\fR password_stdin read password from stdin (only for pam_mount!) .TP \fB\-o\fR SSHOPT=VAL ssh options (see man ssh_config) .SS "FUSE options:" .TP \fB\-d\fR \fB\-o\fR debug enable debug output (implies \fB\-f\fR) .TP \fB\-f\fR foreground operation .TP \fB\-s\fR disable multi\-threaded operation .TP \fB\-o\fR allow_other allow access to other users .TP \fB\-o\fR allow_root allow access to root .TP \fB\-o\fR nonempty allow mounts over non\-empty file/dir .HP \fB\-o\fR default_permissions enable permission checking by kernel .TP \fB\-o\fR fsname=NAME set filesystem name .TP \fB\-o\fR subtype=NAME set filesystem type .TP \fB\-o\fR large_read issue large read requests (2.4 only) .TP \fB\-o\fR max_read=N set maximum size of read requests .TP \fB\-o\fR hard_remove immediate removal (don't hide files) .TP \fB\-o\fR use_ino let filesystem set inode numbers .TP \fB\-o\fR readdir_ino try to fill in d_ino in readdir .TP \fB\-o\fR direct_io use direct I/O .TP \fB\-o\fR kernel_cache cache files in kernel .TP \fB\-o\fR [no]auto_cache enable caching based on modification times .TP \fB\-o\fR umask=M set file permissions (octal) .TP \fB\-o\fR uid=N set file owner .TP \fB\-o\fR gid=N set file group .TP \fB\-o\fR entry_timeout=T cache timeout for names (1.0s) .TP \fB\-o\fR negative_timeout=T cache timeout for deleted names (0.0s) .TP \fB\-o\fR attr_timeout=T cache timeout for attributes (1.0s) .TP \fB\-o\fR ac_attr_timeout=T auto cache timeout for attributes (attr_timeout) .TP \fB\-o\fR intr allow requests to be interrupted .TP \fB\-o\fR intr_signal=NUM signal to send on interrupt (10) .TP \fB\-o\fR modules=M1[:M2...] names of modules to push onto filesystem stack .TP \fB\-o\fR max_write=N set maximum size of write requests .TP \fB\-o\fR max_readahead=N set maximum readahead .TP \fB\-o\fR async_read perform reads asynchronously (default) .TP \fB\-o\fR sync_read perform reads synchronously .SS "Module options:" .TP [subdir] .TP \fB\-o\fR subdir=DIR prepend this directory to all paths (mandatory) .TP \fB\-o\fR [no]rellinks transform absolute symlinks to relative .TP [iconv] .TP \fB\-o\fR from_code=CHARSET original encoding of file names (default: UTF-8) .TP \fB\-o\fR to_code=CHARSET new encoding of the file names (default: ISO-8859-2) .PD .SH "AUTHORS" .LP SSHFS has been written by Miklos Szeredi . .LP This man page was written by Bartosz Fenski for the Debian GNU/Linux distribution (but it may be used by others). sshfs-fuse-2.5/aclocal.m40000644000175000001440000012523412265242317012236 00000000000000# generated automatically by aclocal 1.12.1 -*- Autoconf -*- # Copyright (C) 1996-2012 Free Software Foundation, Inc. # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; without # even the implied warranty of MERCHANTABILITY or FITNESS FOR A # PARTICULAR PURPOSE. m4_ifndef([AC_AUTOCONF_VERSION], [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.69],, [m4_warning([this file was generated for autoconf 2.69. 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Reported by Louis-David Mitterrand * Optimize readdir by sending multiple requests in parallel. Add -o sync_readdir to restore old behavior. Patch by Alexander Neumann 2014-01-07 Miklos Szeredi * Map SSH2_FX_FAILURE to ENOTEMPTY for rmdir. Reported by Ross Lagerwall 2012-05-14 Miklos Szeredi * When checking root directory use LSTAT not STAT. This prevents I/O error being returned after a successful mount if a symlink is mounted. Reported by Bart Friederichs 2012-03-08 Miklos Szeredi * Released 2.4 2012-03-08 Miklos Szeredi * Make sure idmap files aren't writable by others otherwise, other local users could change the mapping, and gain access to things they shouldn't. Patch by Mike Kelly 2012-02-08 Chris Wolfe * Add -o slave. This option routes the sftp communication over stdin and stdout, bypassing SSH and network. 2011-12-16 Mike Kelly * Add -o idmap=file, -o uidmap=FILE, -o gidmap=FILE. These options allow you to create a pair of local files, similar to /etc/passwd or /etc/group files from the remote server, and use those to remap all the given UIDs/GIDs. 2011-11-25 Miklos Szeredi * Make chown respect the UID mapping policy. Reported and tested by Vivenzio Pagliari 2011-11-16 Miklos Szeredi * Submit max 32k reads and writes to the sftp server. Also don't limit the kernel to 64k reads and writes, rather split into 32k sized chunks and send them to the server all at once. This is more efficient and less demanding from the server. Reported by Ludovic Courtès. Fix suggested by Niels Möller 2011-11-14 Miklos Szeredi * Fix double free if reconnection races with request sending. Patch by E. Kuemmerle * Add locking around modifver and connver 2011-10-21 Miklos Szeredi * Remove "-oPreferredAuthentications" from ssh options if the "password_stdin" option is used. Reported by E. Kuemmerle 2011-08-24 Miklos Szeredi * Add "-oworkaround=fstat" for SFTP servers which don't support the FSTAT message. Patch by: Percy Jahn 2011-07-01 Miklos Szeredi * Released 2.3 2011-07-01 Miklos Szeredi * Add hard link operation. Works if the server supports the "hardlink@openssh.com" protocol extension. 2011-03-25 Miklos Szeredi * Fix possible deadlock on reconnection. Reported by Florian Zumbiehl 2011-01-25 Miklos Szeredi * Fix cleanup when ssh connection is terminated. This prevents sshfs hanging when the server is rebooted, for example. 2010-03-16 Miklos Szeredi * Set FD_CLOEXEC on fuse device. This prevents deadlocks that happen in some circumstances (bugzilla.kernel.org #12864). Reported by Tim Connors 2009-07-15 Miklos Szeredi * Check mountpoint and fuse options before starting an ssh session (debian bug #535333). This is only supported if compiled against libfuse-2.6 or later. Reported by Greg Kochanski * Check that the remote path specified refers to the same type of file as the mountpoint, i.e. both are directories or both are non-directories (debian bug #535343). Reported by Greg Kochanski * Allow mounting a single non-directory from the server 2009-07-15 Sebastian Dransfeld * Add option 'delay_connect': This will always create the sshfs mount, even if the connection to the server can't be established. 2009-01-27 Miklos Szeredi * Print usage information and version to stdout, not stderr. Libfuse also needs to be fixed up. Reported by Kārlis Repsons 2008-10-20 Miklos Szeredi * Released 2.2 2008-10-20 Miklos Szeredi * Escape commas in fsname option if libfuse supports it 2008-10-08 Miklos Szeredi * Handle numerical IPv6 addresses enclosed in square brackets. Reported by Andre-John Mas * Fix error if username contains a comma character. Reported by Yang Zhang * Fix harmless glib assertations with "cache=no" 2008-07-11 Miklos Szeredi * Released 2.1 2008-07-11 Miklos Szeredi * Fix statvfs extension to match the current protocol in opensshfs * Check version numbers of extensions, so such changes wouldn't cause stupid behavior 2008-06-24 Miklos Szeredi * Add '-F' option to specify the ssh config file. Patch by Pat Pascal. 2008-05-06 Miklos Szeredi * Fix bug in caching which could cause file corruption for append mode writes. Reported by Jose Alonso 2008-05-05 Miklos Szeredi * Fix compile on OS X. Original patch from Michael G Schwern * Fix compile on Solaris. Reported by Jean-Jacques Sarton 2008-04-23 Miklos Szeredi * Released 2.0 2008-04-23 Miklos Szeredi * Add manual page. Written by Bartosz Fenski 2008-04-22 Miklos Szeredi * Add missing ssh options: ControlMaster, ControlPath, KbdInteractiveAuthentication, KbdInteractiveDevices, LocalCommand, RekeyLimit (Debian bug #430225). * Allow the '-ossh_command=CMD' command to contain parameters. Escape charater is backslash. * Limit write requests to 64kB. * Support "statvfs@openssh.com" extension, which will be available in OpenSSH 5.1. 2008-04-21 Miklos Szeredi * Fix incorrect disk usage reported by 'du' for files of size 4GB or above. Reported by Christian Boltz. 2008-04-16 Miklos Szeredi * If debugging is enabled, print some statistics at exit about the number of bytes transferred, etc.. 2008-03-31 Miklos Szeredi * Support "posix-rename@openssh.com" extension available in OpenSSH 4.9. This allows rename to be atomic even when target file or directory exists. If available, the extension will be used instead of the rename operation in the original protocol and the "-oworkaround=rename" option will be ignored. 2008-03-28 Miklos Szeredi * Add support for password authentication with pam_mount. Original patch and help with testing: John S. Skogtvedt 2008-03-03 Miklos Szeredi * Fix ssh debug only appearing if "-d" is used. Reported by Michael Gorbach 2008-01-03 Miklos Szeredi * Fix condition for building of sshnodelay.so 2007-12-17 Miklos Szeredi * Released 1.9 2007-12-12 Miklos Szeredi * Fix checking for fuse_opt_parse in configure 2007-12-11 Miklos Szeredi * Fill in st_ctime attribute with st_mtime, instead of leaving it zero * Check for OpenSSH version >= 4.4, and if found, don't build the sshnodelay.so workaround 2007-12-10 Miklos Szeredi * Fix crash on writing files, caused by missing locking around sshfs_file_get() * Don't time requests when not debugging * Add subtype support with libfuse >= 2.7.0 * Abort on allocation failure instead of exit * Correctly show default of nodelaysrv workaround in help message 2007-05-16 Miklos Szeredi * Released 1.8 2007-05-15 Miklos Szeredi * Add needed g_thread_init() to fix rare crashes. Reported by Dimitrios Apostolou * Fix memory leak in sshfs_open_common() 2007-04-18 Miklos Szeredi * Fix crash within gdb, caused by sem_wait() returning with an error on interrupt. Reported by Dimitrios Apostolou * Fix spurious cache entries remaining after renaming a directory 2007-02-28 Miklos Szeredi * Don't set DISPLAY environment variable to "", because it breaks ssh-askpass. Make nodelaysrv_workaround default to off, because with this change it may have security implications. 2007-02-19 Miklos Szeredi * OpenSSH sftp-server can read requests faster, than it processes them, when it's buffer is full it aborts. This can happen on a large upload to a slow server. Work around this by limiting the total size of outstanding reqests. Debian bug #365541. Tracked down by Thue Janus Kristensen * Add --disable-sshnodelay configure option. The sshnodelay.so hack shouldnt be needed with OpenSSH client versions >= 4.3 2006-12-20 Miklos Szeredi * Work around write performace issues due to missing TCP_NODELAY in sshd. Reported by Justin Searle 2006-11-10 Miklos Szeredi * Fix bug which ommitted directory entries for symlinks with the -ofollow_symlinks option. Bug reported by Mikael Ståldal 2006-09-29 Miklos Szeredi * Fix segfault if there are outstanding writes to the server after release on the file descriptor. This only happened on FreeBSD. Reported by Andriy Gapon 2006-08-18 Miklos Szeredi * Released 1.7 2006-08-17 Miklos Szeredi * Cosmetics on bogus statfs numbers 2006-08-16 Miklos Szeredi * Add option 'follow_symlinks' to resolve symlinks on the server. * On setups where the login shell prints a banner, the sftp protocol was confused, and bailed out with "reply len too large: ...". So iterate over any rubbish read immediately after login until a valid reply is found. * Check remote directory for existence before mounting. Closes Ubuntu bug #46633 2006-03-10 Miklos Szeredi * Use socketpair() instead of pipe() for communication between ssh and sshfs. Patch from Csaba Henk * Update to FUSE interface version 26 2006-03-09 Miklos Szeredi * Released 1.6 2006-03-09 Miklos Szeredi * Fix segfault if remote host is down and reconnection is enabled 2006-03-08 Miklos Szeredi * Fix bug in symlink transformation. Reported by Ralf Hoffmann 2006-02-24 Miklos Szeredi * Add workaround for broken truncate on old sftp servers. Can be enabled with '-oworkaround=truncate'. Patch from Joseph M Link 2006-02-23 Miklos Szeredi * Avoid double memcpy on writes. Patch by Joseph M Link * More memory copy avoidance 2006-02-22 Miklos Szeredi * Add -fPIC to the comile flags of sshnodelay.so. Reported by Anthony Kolasny 2006-02-20 Miklos Szeredi * Released 1.5 2006-02-19 Miklos Szeredi * Fix compilation with old FUSE versions. Report by Kurt George Gjerde 2006-02-16 Miklos Szeredi * Block TERM/INT/HUP/QUIT signals in sshfs reading thread, so they will always be received by the FUSE main thread. Fixes the "double ^C" problem seen on FreeBSD. * Use 'auto_cache' option if available, so that file cache is not thrown away on each open. This should make repeated reading of a file much much faster. 2006-01-31 Miklos Szeredi * Fix problems with nodelay workaround on FreeBSD. 2006-01-30 Miklos Szeredi * Fix data consitency bug if readahead is enabled and writes are intermixed with reads. Solution is far from optimal, since it will prevent readahead in the above situation. If used with FUSE >= 2.6.0 with Linux-2.6.X, readahead will be done by the kernel, and hence there will be no performance penalty. Bug reported and test program written by Wolfgang Köbler. Further testing on FreeBSD by Csaba Henk 2006-01-29 Miklos Szeredi * Add '-olarge_read' option for Linux-2.4.*. This should generally improve download performance 2006-01-27 Miklos Szeredi * Add workaround (enabled by default) for ssh clients not setting TCP_NODELAY on the network connection. Currently this is all known versions of openssh. This may improve download speed in some circumstances * Make it possible to idividually disable workarounds with a "no" prefix * Change '-otransform_symlinks' not to prefix with the mountpoint (which is fragile wrt. moving/binding the mount). Rather convert absolute symlinks to relative if possible. Does not yet work if base path is itself relative 2006-01-25 Miklos Szeredi * Use TCP_NODELAY socket option for direct connection. This may improve download speed in some circumstances 2006-01-20 Miklos Szeredi * Update to fuse API 2.6 * Don't do readahead in sshfs if it's done in kernel 2006-01-14 Miklos Szeredi * Released 1.4 2006-01-09 Miklos Szeredi * Added 'transform_symlinks' option to "fix-up" absolute symlinks. Patch by Paul Jarc * Add option parsing implementation, so linking with older than 2.5.0 libfuse still works. 2005-12-09 Miklos Szeredi * Use new option parsing interface of FUSE 2005-11-28 Miklos Szeredi * Set statvfs::f_frsize 2005-11-23 Miklos Szeredi * Fix warnings on 64bit systems. Reported by D. R. Evans 2005-11-16 Miklos Szeredi * Replace EPROTO with the more portable EIO * Fix bug in option parsing. Reported by Csaba Henk 2005-10-29 Miklos Szeredi * Use FUSE version 25 if available * Add include. Reported by Csaba Henk 2005-10-29 Miklos Szeredi * Released 1.3 2005-10-28 Miklos Szeredi * Add atomic create+open and ftruncate operation. This should fix issues with 'cp' and other programs failing with "Permission denied". To be effective, needs FUSE version 2.5 and kernel version 2.6.15 (just a guess, since neither of them is released yet). 2005-10-27 Miklos Szeredi * Add support for SSH protocol version 1. Bug reported by Miklos Bagi Jr. 2005-10-26 Miklos Szeredi * Fix typo (ConnectTimeout -> ConnectionTimeout) in ssh options. Bug reported by Miklos Bagi Jr. 2005-10-19 Miklos Szeredi * GNOME Nautilus fails to copy file to sshfs filesystem, because FUSE returns zero free space. So instead return huge (999999999 kbytes) amount of free space, yet it should be obvious that the number is artificial. Bug report by Peter Kronheimer 2005-10-18 Miklos Szeredi * Add remote uid detection and translation ('idmap=user' option). Idea and implementation details worked out by Jean-Marc Valin 2005-10-17 Miklos Szeredi * Add one more missing lock. * Add workaround for failure to rename to an existing file. Based on patch by Michael Best 2005-10-15 Miklos Szeredi * Protect request ID allocation with mutex. Bug report by Tvrtko Ursulin 2005-08-17 Miklos Szeredi * Try to calculate approximate disk usage of files from their size, so that 'du' returns meaningful results. Problem reported by Bernd Amend. 2005-08-15 Miklos Szeredi * Released 1.2 2005-08-13 Miklos Szeredi * Add 'reconnect' option, which tries to reconnect to the server when the connection is broken. If a password is required for connection, it is recommended that you install ssh-askpass, and set the SSH_ASKPASS environment variable (see 'man ssh' for more details). 2005-05-05 Miklos Szeredi * Work around missing truncate() support in some older sftp servers (only works for zero size truncate). Thanks to Eduard Czimbalmos for the bug report and help with testing 2005-04-13 Miklos Szeredi * Fix compilation with gcc-2.95. Reported by David A. Gershman 2005-03-08 Miklos Szeredi * Make it work on server version 2 (e.g. Sun_SSH_1.0.1). Report and testing by Pieter J. Kersten 2005-03-04 Miklos Szeredi * Released 1.1 2005-03-03 Miklos Szeredi * Slightly optimize readahead. Still not clever enough to always keep the pipe filled. * Add 'sshfs_debug' option 2005-02-17 Miklos Szeredi * Parse 'max_read' mount option and if smaller than 65536 forward to FUSE 2005-02-16 Miklos Szeredi * Added simple readahead (big performance gain in case of sequential read pattern). Can be disabled with '-o no_readahead' 2005-02-14 Miklos Szeredi * Added asynchronous writeback (big performance gain) and made this the default. Can be disabled with '-o sshfs_sync' 2005-02-09 Miklos Szeredi * Added option to start arbitary command instead of 'ssh' * Re-added '-p PORT' as a convenience option, also '-C' works as in ssh. 2005-02-08 Miklos Szeredi * Add caching of symlinks * Add support for many ssh options to be passed to ssh * Port number can now actually be specified with "-o port=PORT", bug spotted by Andrew Ukrainec 2005-02-07 Miklos Szeredi * Separate attribute caching to a separate layer * Add caching of directory contents 2005-02-03 Miklos Szeredi Fix PKG_CONFIG_PATH setting in configure.ac (reported by Alpar Juttner) 2005-01-09 Miklos Szeredi * Released 1.0 2004-12-04 Miklos Szeredi * Started ChangeLog sshfs-fuse-2.5/config.h.in0000644000175000001440000000143012265242323012405 00000000000000/* config.h.in. Generated from configure.ac by autoheader. */ /* Define to 1 if your C compiler doesn't accept -c and -o together. */ #undef NO_MINUS_C_MINUS_O /* Name of package */ #undef PACKAGE /* Define to the address where bug reports for this package should be sent. */ #undef PACKAGE_BUGREPORT /* Define to the full name of this package. */ #undef PACKAGE_NAME /* Define to the full name and version of this package. */ #undef PACKAGE_STRING /* Define to the one symbol short name of this package. */ #undef PACKAGE_TARNAME /* Define to the home page for this package. */ #undef PACKAGE_URL /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Compile ssh NODELAY workaround */ #undef SSH_NODELAY_WORKAROUND /* Version number of package */ #undef VERSION sshfs-fuse-2.5/sshfs.c0000644000175000001440000026354112263270034011667 00000000000000/* SSH file system Copyright (C) 2004 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ #define _GNU_SOURCE /* avoid implicit declaration of *pt* functions */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "cache.h" #ifndef MAP_LOCKED #define MAP_LOCKED 0 #endif #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON) #define MAP_ANONYMOUS MAP_ANON #endif #define SSH_FXP_INIT 1 #define SSH_FXP_VERSION 2 #define SSH_FXP_OPEN 3 #define SSH_FXP_CLOSE 4 #define SSH_FXP_READ 5 #define SSH_FXP_WRITE 6 #define SSH_FXP_LSTAT 7 #define SSH_FXP_FSTAT 8 #define SSH_FXP_SETSTAT 9 #define SSH_FXP_FSETSTAT 10 #define SSH_FXP_OPENDIR 11 #define SSH_FXP_READDIR 12 #define SSH_FXP_REMOVE 13 #define SSH_FXP_MKDIR 14 #define SSH_FXP_RMDIR 15 #define SSH_FXP_REALPATH 16 #define SSH_FXP_STAT 17 #define SSH_FXP_RENAME 18 #define SSH_FXP_READLINK 19 #define SSH_FXP_SYMLINK 20 #define SSH_FXP_STATUS 101 #define SSH_FXP_HANDLE 102 #define SSH_FXP_DATA 103 #define SSH_FXP_NAME 104 #define SSH_FXP_ATTRS 105 #define SSH_FXP_EXTENDED 200 #define SSH_FXP_EXTENDED_REPLY 201 #define SSH_FILEXFER_ATTR_SIZE 0x00000001 #define SSH_FILEXFER_ATTR_UIDGID 0x00000002 #define SSH_FILEXFER_ATTR_PERMISSIONS 0x00000004 #define SSH_FILEXFER_ATTR_ACMODTIME 0x00000008 #define SSH_FILEXFER_ATTR_EXTENDED 0x80000000 #define SSH_FX_OK 0 #define SSH_FX_EOF 1 #define SSH_FX_NO_SUCH_FILE 2 #define SSH_FX_PERMISSION_DENIED 3 #define SSH_FX_FAILURE 4 #define SSH_FX_BAD_MESSAGE 5 #define SSH_FX_NO_CONNECTION 6 #define SSH_FX_CONNECTION_LOST 7 #define SSH_FX_OP_UNSUPPORTED 8 #define SSH_FXF_READ 0x00000001 #define SSH_FXF_WRITE 0x00000002 #define SSH_FXF_APPEND 0x00000004 #define SSH_FXF_CREAT 0x00000008 #define SSH_FXF_TRUNC 0x00000010 #define SSH_FXF_EXCL 0x00000020 /* statvfs@openssh.com f_flag flags */ #define SSH2_FXE_STATVFS_ST_RDONLY 0x00000001 #define SSH2_FXE_STATVFS_ST_NOSUID 0x00000002 #define SFTP_EXT_POSIX_RENAME "posix-rename@openssh.com" #define SFTP_EXT_STATVFS "statvfs@openssh.com" #define SFTP_EXT_HARDLINK "hardlink@openssh.com" #define PROTO_VERSION 3 #define MY_EOF 1 #define MAX_REPLY_LEN (1 << 17) #define RENAME_TEMP_CHARS 8 #define SFTP_SERVER_PATH "/usr/lib/sftp-server" #define SSHNODELAY_SO "sshnodelay.so" /* Asynchronous readdir parameters */ #define READDIR_START 2 #define READDIR_MAX 32 struct buffer { uint8_t *p; size_t len; size_t size; }; struct list_head { struct list_head *prev; struct list_head *next; }; struct request; typedef void (*request_func)(struct request *); struct request { unsigned int want_reply; sem_t ready; uint8_t reply_type; uint32_t id; int replied; int error; struct buffer reply; struct timeval start; void *data; request_func end_func; size_t len; struct list_head list; }; struct sshfs_io { int num_reqs; pthread_cond_t finished; int error; }; struct read_req { struct sshfs_io *sio; struct list_head list; struct buffer data; size_t size; ssize_t res; }; struct read_chunk { off_t offset; size_t size; int refs; long modifver; struct list_head reqs; struct sshfs_io sio; }; struct sshfs_file { struct buffer handle; struct list_head write_reqs; pthread_cond_t write_finished; int write_error; struct read_chunk *readahead; off_t next_pos; int is_seq; int connver; int modifver; int refs; }; struct sshfs { char *directport; char *ssh_command; char *sftp_server; struct fuse_args ssh_args; char *workarounds; int rename_workaround; int nodelay_workaround; int nodelaysrv_workaround; int truncate_workaround; int buflimit_workaround; int fstat_workaround; int transform_symlinks; int follow_symlinks; int no_check_root; int detect_uid; int idmap; int nomap; int disable_hardlink; char *uid_file; char *gid_file; GHashTable *uid_map; GHashTable *gid_map; GHashTable *r_uid_map; GHashTable *r_gid_map; unsigned max_read; unsigned max_write; unsigned ssh_ver; int sync_write; int sync_read; int sync_readdir; int debug; int foreground; int reconnect; int delay_connect; int slave; char *host; char *base_path; GHashTable *reqtab; pthread_mutex_t lock; pthread_mutex_t lock_write; int processing_thread_started; unsigned int randseed; int rfd; int wfd; int ptyfd; int ptyslavefd; int connver; int server_version; unsigned remote_uid; unsigned local_uid; int remote_uid_detected; unsigned blksize; char *progname; long modifver; unsigned outstanding_len; unsigned max_outstanding_len; pthread_cond_t outstanding_cond; int password_stdin; char *password; int ext_posix_rename; int ext_statvfs; int ext_hardlink; mode_t mnt_mode; /* statistics */ uint64_t bytes_sent; uint64_t bytes_received; uint64_t num_sent; uint64_t num_received; unsigned int min_rtt; unsigned int max_rtt; uint64_t total_rtt; unsigned int num_connect; }; static struct sshfs sshfs; static const char *ssh_opts[] = { "AddressFamily", "BatchMode", "BindAddress", "ChallengeResponseAuthentication", "CheckHostIP", "Cipher", "Ciphers", "Compression", "CompressionLevel", "ConnectionAttempts", "ConnectTimeout", "ControlMaster", "ControlPath", "GlobalKnownHostsFile", "GSSAPIAuthentication", "GSSAPIDelegateCredentials", "HostbasedAuthentication", "HostKeyAlgorithms", "HostKeyAlias", "HostName", "IdentitiesOnly", "IdentityFile", "KbdInteractiveAuthentication", "KbdInteractiveDevices", "LocalCommand", "LogLevel", "MACs", "NoHostAuthenticationForLocalhost", "NumberOfPasswordPrompts", "PasswordAuthentication", "Port", "PreferredAuthentications", "ProxyCommand", "PubkeyAuthentication", "RekeyLimit", "RhostsRSAAuthentication", "RSAAuthentication", "ServerAliveCountMax", "ServerAliveInterval", "SmartcardDevice", "StrictHostKeyChecking", "TCPKeepAlive", "UsePrivilegedPort", "UserKnownHostsFile", "VerifyHostKeyDNS", NULL, }; enum { KEY_PORT, KEY_COMPRESS, KEY_HELP, KEY_VERSION, KEY_FOREGROUND, KEY_CONFIGFILE, }; enum { IDMAP_NONE, IDMAP_USER, IDMAP_FILE, }; enum { NOMAP_IGNORE, NOMAP_ERROR, }; #define SSHFS_OPT(t, p, v) { t, offsetof(struct sshfs, p), v } static struct fuse_opt sshfs_opts[] = { SSHFS_OPT("directport=%s", directport, 0), SSHFS_OPT("ssh_command=%s", ssh_command, 0), SSHFS_OPT("sftp_server=%s", sftp_server, 0), SSHFS_OPT("max_read=%u", max_read, 0), SSHFS_OPT("max_write=%u", max_write, 0), SSHFS_OPT("ssh_protocol=%u", ssh_ver, 0), SSHFS_OPT("-1", ssh_ver, 1), SSHFS_OPT("workaround=%s", workarounds, 0), SSHFS_OPT("idmap=none", idmap, IDMAP_NONE), SSHFS_OPT("idmap=user", idmap, IDMAP_USER), SSHFS_OPT("idmap=file", idmap, IDMAP_FILE), SSHFS_OPT("uidfile=%s", uid_file, 0), SSHFS_OPT("gidfile=%s", gid_file, 0), SSHFS_OPT("nomap=ignore", nomap, NOMAP_IGNORE), SSHFS_OPT("nomap=error", nomap, NOMAP_ERROR), SSHFS_OPT("sshfs_sync", sync_write, 1), SSHFS_OPT("no_readahead", sync_read, 1), SSHFS_OPT("sync_readdir", sync_readdir, 1), SSHFS_OPT("sshfs_debug", debug, 1), SSHFS_OPT("reconnect", reconnect, 1), SSHFS_OPT("transform_symlinks", transform_symlinks, 1), SSHFS_OPT("follow_symlinks", follow_symlinks, 1), SSHFS_OPT("no_check_root", no_check_root, 1), SSHFS_OPT("password_stdin", password_stdin, 1), SSHFS_OPT("delay_connect", delay_connect, 1), SSHFS_OPT("slave", slave, 1), SSHFS_OPT("disable_hardlink", disable_hardlink, 1), FUSE_OPT_KEY("-p ", KEY_PORT), FUSE_OPT_KEY("-C", KEY_COMPRESS), FUSE_OPT_KEY("-V", KEY_VERSION), FUSE_OPT_KEY("--version", KEY_VERSION), FUSE_OPT_KEY("-h", KEY_HELP), FUSE_OPT_KEY("--help", KEY_HELP), FUSE_OPT_KEY("debug", KEY_FOREGROUND), FUSE_OPT_KEY("-d", KEY_FOREGROUND), FUSE_OPT_KEY("-f", KEY_FOREGROUND), FUSE_OPT_KEY("-F ", KEY_CONFIGFILE), FUSE_OPT_END }; static struct fuse_opt workaround_opts[] = { SSHFS_OPT("none", rename_workaround, 0), SSHFS_OPT("none", nodelay_workaround, 0), SSHFS_OPT("none", nodelaysrv_workaround, 0), SSHFS_OPT("none", truncate_workaround, 0), SSHFS_OPT("none", buflimit_workaround, 0), SSHFS_OPT("none", fstat_workaround, 0), SSHFS_OPT("all", rename_workaround, 1), SSHFS_OPT("all", nodelay_workaround, 1), SSHFS_OPT("all", nodelaysrv_workaround, 1), SSHFS_OPT("all", truncate_workaround, 1), SSHFS_OPT("all", buflimit_workaround, 1), SSHFS_OPT("all", fstat_workaround, 1), SSHFS_OPT("rename", rename_workaround, 1), SSHFS_OPT("norename", rename_workaround, 0), SSHFS_OPT("nodelay", nodelay_workaround, 1), SSHFS_OPT("nonodelay", nodelay_workaround, 0), SSHFS_OPT("nodelaysrv", nodelaysrv_workaround, 1), SSHFS_OPT("nonodelaysrv", nodelaysrv_workaround, 0), SSHFS_OPT("truncate", truncate_workaround, 1), SSHFS_OPT("notruncate", truncate_workaround, 0), SSHFS_OPT("buflimit", buflimit_workaround, 1), SSHFS_OPT("nobuflimit", buflimit_workaround, 0), SSHFS_OPT("fstat", fstat_workaround, 1), SSHFS_OPT("nofstat", fstat_workaround, 0), FUSE_OPT_END }; #define DEBUG(format, args...) \ do { if (sshfs.debug) fprintf(stderr, format, args); } while(0) static const char *type_name(uint8_t type) { switch(type) { case SSH_FXP_INIT: return "INIT"; case SSH_FXP_VERSION: return "VERSION"; case SSH_FXP_OPEN: return "OPEN"; case SSH_FXP_CLOSE: return "CLOSE"; case SSH_FXP_READ: return "READ"; case SSH_FXP_WRITE: return "WRITE"; case SSH_FXP_LSTAT: return "LSTAT"; case SSH_FXP_FSTAT: return "FSTAT"; case SSH_FXP_SETSTAT: return "SETSTAT"; case SSH_FXP_FSETSTAT: return "FSETSTAT"; case SSH_FXP_OPENDIR: return "OPENDIR"; case SSH_FXP_READDIR: return "READDIR"; case SSH_FXP_REMOVE: return "REMOVE"; case SSH_FXP_MKDIR: return "MKDIR"; case SSH_FXP_RMDIR: return "RMDIR"; case SSH_FXP_REALPATH: return "REALPATH"; case SSH_FXP_STAT: return "STAT"; case SSH_FXP_RENAME: return "RENAME"; case SSH_FXP_READLINK: return "READLINK"; case SSH_FXP_SYMLINK: return "SYMLINK"; case SSH_FXP_STATUS: return "STATUS"; case SSH_FXP_HANDLE: return "HANDLE"; case SSH_FXP_DATA: return "DATA"; case SSH_FXP_NAME: return "NAME"; case SSH_FXP_ATTRS: return "ATTRS"; case SSH_FXP_EXTENDED: return "EXTENDED"; case SSH_FXP_EXTENDED_REPLY: return "EXTENDED_REPLY"; default: return "???"; } } #define container_of(ptr, type, member) ({ \ const typeof( ((type *)0)->member ) *__mptr = (ptr); \ (type *)( (char *)__mptr - offsetof(type,member) );}) #define list_entry(ptr, type, member) \ container_of(ptr, type, member) static void list_init(struct list_head *head) { head->next = head; head->prev = head; } static void list_add(struct list_head *new, struct list_head *head) { struct list_head *prev = head; struct list_head *next = head->next; next->prev = new; new->next = next; new->prev = prev; prev->next = new; } static void list_del(struct list_head *entry) { struct list_head *prev = entry->prev; struct list_head *next = entry->next; next->prev = prev; prev->next = next; } static int list_empty(const struct list_head *head) { return head->next == head; } /* given a pointer to the uid/gid, and the mapping table, remap the * uid/gid, if necessary */ static inline int translate_id(uint32_t *id, GHashTable *map) { gpointer id_p; if (g_hash_table_lookup_extended(map, GUINT_TO_POINTER(*id), NULL, &id_p)) { *id = GPOINTER_TO_UINT(id_p); return 0; } switch (sshfs.nomap) { case NOMAP_ERROR: return -1; case NOMAP_IGNORE: return 0; default: fprintf(stderr, "internal error\n"); abort(); } } static inline void buf_init(struct buffer *buf, size_t size) { if (size) { buf->p = (uint8_t *) malloc(size); if (!buf->p) { fprintf(stderr, "sshfs: memory allocation failed\n"); abort(); } } else buf->p = NULL; buf->len = 0; buf->size = size; } static inline void buf_free(struct buffer *buf) { free(buf->p); } static inline void buf_finish(struct buffer *buf) { buf->len = buf->size; } static inline void buf_clear(struct buffer *buf) { buf_free(buf); buf_init(buf, 0); } static void buf_resize(struct buffer *buf, size_t len) { buf->size = (buf->len + len + 63) & ~31; buf->p = (uint8_t *) realloc(buf->p, buf->size); if (!buf->p) { fprintf(stderr, "sshfs: memory allocation failed\n"); abort(); } } static inline void buf_check_add(struct buffer *buf, size_t len) { if (buf->len + len > buf->size) buf_resize(buf, len); } #define _buf_add_mem(b, d, l) \ buf_check_add(b, l); \ memcpy(b->p + b->len, d, l); \ b->len += l; static inline void buf_add_mem(struct buffer *buf, const void *data, size_t len) { _buf_add_mem(buf, data, len); } static inline void buf_add_buf(struct buffer *buf, const struct buffer *bufa) { _buf_add_mem(buf, bufa->p, bufa->len); } static inline void buf_add_uint8(struct buffer *buf, uint8_t val) { _buf_add_mem(buf, &val, 1); } static inline void buf_add_uint32(struct buffer *buf, uint32_t val) { uint32_t nval = htonl(val); _buf_add_mem(buf, &nval, 4); } static inline void buf_add_uint64(struct buffer *buf, uint64_t val) { buf_add_uint32(buf, val >> 32); buf_add_uint32(buf, val & 0xffffffff); } static inline void buf_add_data(struct buffer *buf, const struct buffer *data) { buf_add_uint32(buf, data->len); buf_add_mem(buf, data->p, data->len); } static inline void buf_add_string(struct buffer *buf, const char *str) { struct buffer data; data.p = (uint8_t *) str; data.len = strlen(str); buf_add_data(buf, &data); } static inline void buf_add_path(struct buffer *buf, const char *path) { char *realpath; if (sshfs.base_path[0]) { if (path[1]) { if (sshfs.base_path[strlen(sshfs.base_path)-1] != '/') { realpath = g_strdup_printf("%s/%s", sshfs.base_path, path + 1); } else { realpath = g_strdup_printf("%s%s", sshfs.base_path, path + 1); } } else { realpath = g_strdup(sshfs.base_path); } } else { if (path[1]) realpath = g_strdup(path + 1); else realpath = g_strdup("."); } buf_add_string(buf, realpath); g_free(realpath); } static int buf_check_get(struct buffer *buf, size_t len) { if (buf->len + len > buf->size) { fprintf(stderr, "buffer too short\n"); return -1; } else return 0; } static inline int buf_get_mem(struct buffer *buf, void *data, size_t len) { if (buf_check_get(buf, len) == -1) return -1; memcpy(data, buf->p + buf->len, len); buf->len += len; return 0; } static inline int buf_get_uint8(struct buffer *buf, uint8_t *val) { return buf_get_mem(buf, val, 1); } static inline int buf_get_uint32(struct buffer *buf, uint32_t *val) { uint32_t nval; if (buf_get_mem(buf, &nval, 4) == -1) return -1; *val = ntohl(nval); return 0; } static inline int buf_get_uint64(struct buffer *buf, uint64_t *val) { uint32_t val1; uint32_t val2; if (buf_get_uint32(buf, &val1) == -1 || buf_get_uint32(buf, &val2) == -1) { return -1; } *val = ((uint64_t) val1 << 32) + val2; return 0; } static inline int buf_get_data(struct buffer *buf, struct buffer *data) { uint32_t len; if (buf_get_uint32(buf, &len) == -1 || len > buf->size - buf->len) return -1; buf_init(data, len + 1); data->size = len; if (buf_get_mem(buf, data->p, data->size) == -1) { buf_free(data); return -1; } return 0; } static inline int buf_get_string(struct buffer *buf, char **str) { struct buffer data; if (buf_get_data(buf, &data) == -1) return -1; data.p[data.size] = '\0'; *str = (char *) data.p; return 0; } static int buf_get_attrs(struct buffer *buf, struct stat *stbuf, int *flagsp) { uint32_t flags; uint64_t size = 0; uint32_t uid = 0; uint32_t gid = 0; uint32_t atime = 0; uint32_t mtime = 0; uint32_t mode = S_IFREG | 0777; if (buf_get_uint32(buf, &flags) == -1) return -EIO; if (flagsp) *flagsp = flags; if ((flags & SSH_FILEXFER_ATTR_SIZE) && buf_get_uint64(buf, &size) == -1) return -EIO; if ((flags & SSH_FILEXFER_ATTR_UIDGID) && (buf_get_uint32(buf, &uid) == -1 || buf_get_uint32(buf, &gid) == -1)) return -EIO; if ((flags & SSH_FILEXFER_ATTR_PERMISSIONS) && buf_get_uint32(buf, &mode) == -1) return -EIO; if ((flags & SSH_FILEXFER_ATTR_ACMODTIME)) { if (buf_get_uint32(buf, &atime) == -1 || buf_get_uint32(buf, &mtime) == -1) return -EIO; } if ((flags & SSH_FILEXFER_ATTR_EXTENDED)) { uint32_t extcount; unsigned i; if (buf_get_uint32(buf, &extcount) == -1) return -EIO; for (i = 0; i < extcount; i++) { struct buffer tmp; if (buf_get_data(buf, &tmp) == -1) return -EIO; buf_free(&tmp); if (buf_get_data(buf, &tmp) == -1) return -EIO; buf_free(&tmp); } } if (sshfs.remote_uid_detected && uid == sshfs.remote_uid) uid = sshfs.local_uid; if (sshfs.idmap == IDMAP_FILE && sshfs.uid_map) if (translate_id(&uid, sshfs.uid_map) == -1) return -EPERM; if (sshfs.idmap == IDMAP_FILE && sshfs.gid_map) if (translate_id(&gid, sshfs.gid_map) == -1) return -EPERM; memset(stbuf, 0, sizeof(struct stat)); stbuf->st_mode = mode; stbuf->st_nlink = 1; stbuf->st_size = size; if (sshfs.blksize) { stbuf->st_blksize = sshfs.blksize; stbuf->st_blocks = ((size + sshfs.blksize - 1) & ~((unsigned long long) sshfs.blksize - 1)) >> 9; } stbuf->st_uid = uid; stbuf->st_gid = gid; stbuf->st_atime = atime; stbuf->st_ctime = stbuf->st_mtime = mtime; return 0; } static int buf_get_statvfs(struct buffer *buf, struct statvfs *stbuf) { uint64_t bsize; uint64_t frsize; uint64_t blocks; uint64_t bfree; uint64_t bavail; uint64_t files; uint64_t ffree; uint64_t favail; uint64_t fsid; uint64_t flag; uint64_t namemax; if (buf_get_uint64(buf, &bsize) == -1 || buf_get_uint64(buf, &frsize) == -1 || buf_get_uint64(buf, &blocks) == -1 || buf_get_uint64(buf, &bfree) == -1 || buf_get_uint64(buf, &bavail) == -1 || buf_get_uint64(buf, &files) == -1 || buf_get_uint64(buf, &ffree) == -1 || buf_get_uint64(buf, &favail) == -1 || buf_get_uint64(buf, &fsid) == -1 || buf_get_uint64(buf, &flag) == -1 || buf_get_uint64(buf, &namemax) == -1) { return -1; } memset(stbuf, 0, sizeof(struct statvfs)); stbuf->f_bsize = bsize; stbuf->f_frsize = frsize; stbuf->f_blocks = blocks; stbuf->f_bfree = bfree; stbuf->f_bavail = bavail; stbuf->f_files = files; stbuf->f_ffree = ffree; stbuf->f_favail = favail; stbuf->f_namemax = namemax; return 0; } static int buf_get_entries(struct buffer *buf, fuse_cache_dirh_t h, fuse_cache_dirfil_t filler) { uint32_t count; unsigned i; if (buf_get_uint32(buf, &count) == -1) return -EIO; for (i = 0; i < count; i++) { int err = -1; char *name; char *longname; struct stat stbuf; if (buf_get_string(buf, &name) == -1) return -EIO; if (buf_get_string(buf, &longname) != -1) { free(longname); err = buf_get_attrs(buf, &stbuf, NULL); if (!err) { if (sshfs.follow_symlinks && S_ISLNK(stbuf.st_mode)) { stbuf.st_mode = 0; } filler(h, name, &stbuf); } } free(name); if (err) return err; } return 0; } static void ssh_add_arg(const char *arg) { if (fuse_opt_add_arg(&sshfs.ssh_args, arg) == -1) _exit(1); } #ifdef SSH_NODELAY_WORKAROUND static int do_ssh_nodelay_workaround(void) { char *oldpreload = getenv("LD_PRELOAD"); char *newpreload; char sopath[PATH_MAX]; int res; snprintf(sopath, sizeof(sopath), "%s/%s", LIBDIR, SSHNODELAY_SO); res = access(sopath, R_OK); if (res == -1) { char *s; if (!realpath(sshfs.progname, sopath)) return -1; s = strrchr(sopath, '/'); if (!s) s = sopath; else s++; if (s + strlen(SSHNODELAY_SO) >= sopath + sizeof(sopath)) return -1; strcpy(s, SSHNODELAY_SO); res = access(sopath, R_OK); if (res == -1) { fprintf(stderr, "sshfs: cannot find %s\n", SSHNODELAY_SO); return -1; } } newpreload = g_strdup_printf("%s%s%s", oldpreload ? oldpreload : "", oldpreload ? " " : "", sopath); if (!newpreload || setenv("LD_PRELOAD", newpreload, 1) == -1) { fprintf(stderr, "warning: failed set LD_PRELOAD " "for ssh nodelay workaround\n"); } g_free(newpreload); return 0; } #endif static int pty_expect_loop(void) { int res; char buf[256]; const char *passwd_str = "assword:"; int timeout = 60 * 1000; /* 1min timeout for the prompt to appear */ int passwd_len = strlen(passwd_str); int len = 0; char c; while (1) { struct pollfd fds[2]; fds[0].fd = sshfs.rfd; fds[0].events = POLLIN; fds[1].fd = sshfs.ptyfd; fds[1].events = POLLIN; res = poll(fds, 2, timeout); if (res == -1) { perror("poll"); return -1; } if (res == 0) { fprintf(stderr, "Timeout waiting for prompt\n"); return -1; } if (fds[0].revents) { /* * Something happened on stdout of ssh, this * either means, that we are connected, or * that we are disconnected. In any case the * password doesn't matter any more. */ break; } res = read(sshfs.ptyfd, &c, 1); if (res == -1) { perror("read"); return -1; } if (res == 0) { fprintf(stderr, "EOF while waiting for prompt\n"); return -1; } buf[len] = c; len++; if (len == passwd_len) { if (memcmp(buf, passwd_str, passwd_len) == 0) { write(sshfs.ptyfd, sshfs.password, strlen(sshfs.password)); } memmove(buf, buf + 1, passwd_len - 1); len--; } } if (!sshfs.reconnect) { size_t size = getpagesize(); memset(sshfs.password, 0, size); munmap(sshfs.password, size); sshfs.password = NULL; } return 0; } static int pty_master(char **name) { int mfd; mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY); if (mfd == -1) { perror("failed to open pty"); return -1; } if (grantpt(mfd) != 0) { perror("grantpt"); return -1; } if (unlockpt(mfd) != 0) { perror("unlockpt"); return -1; } *name = ptsname(mfd); return mfd; } static void replace_arg(char **argp, const char *newarg) { free(*argp); *argp = strdup(newarg); if (*argp == NULL) { fprintf(stderr, "sshfs: memory allocation failed\n"); abort(); } } static int start_ssh(void) { char *ptyname = NULL; int sockpair[2]; int pid; if (sshfs.password_stdin) { sshfs.ptyfd = pty_master(&ptyname); if (sshfs.ptyfd == -1) return -1; sshfs.ptyslavefd = open(ptyname, O_RDWR | O_NOCTTY); if (sshfs.ptyslavefd == -1) return -1; } if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockpair) == -1) { perror("failed to create socket pair"); return -1; } sshfs.rfd = sockpair[0]; sshfs.wfd = sockpair[0]; pid = fork(); if (pid == -1) { perror("failed to fork"); close(sockpair[1]); return -1; } else if (pid == 0) { int devnull; #ifdef SSH_NODELAY_WORKAROUND if (sshfs.nodelay_workaround && do_ssh_nodelay_workaround() == -1) { fprintf(stderr, "warning: ssh nodelay workaround disabled\n"); } #endif if (sshfs.nodelaysrv_workaround) { int i; /* * Hack to work around missing TCP_NODELAY * setting in sshd */ for (i = 1; i < sshfs.ssh_args.argc; i++) { if (strcmp(sshfs.ssh_args.argv[i], "-x") == 0) { replace_arg(&sshfs.ssh_args.argv[i], "-X"); break; } } } devnull = open("/dev/null", O_WRONLY); if (dup2(sockpair[1], 0) == -1 || dup2(sockpair[1], 1) == -1) { perror("failed to redirect input/output"); _exit(1); } if (!sshfs.foreground && devnull != -1) dup2(devnull, 2); close(devnull); close(sockpair[0]); close(sockpair[1]); switch (fork()) { case -1: perror("failed to fork"); _exit(1); case 0: break; default: _exit(0); } chdir("/"); if (sshfs.password_stdin) { int sfd; setsid(); sfd = open(ptyname, O_RDWR); if (sfd == -1) { perror(ptyname); _exit(1); } close(sfd); close(sshfs.ptyslavefd); close(sshfs.ptyfd); } if (sshfs.debug) { int i; fprintf(stderr, "executing"); for (i = 0; i < sshfs.ssh_args.argc; i++) fprintf(stderr, " <%s>", sshfs.ssh_args.argv[i]); fprintf(stderr, "\n"); } execvp(sshfs.ssh_args.argv[0], sshfs.ssh_args.argv); fprintf(stderr, "failed to execute '%s': %s\n", sshfs.ssh_args.argv[0], strerror(errno)); _exit(1); } waitpid(pid, NULL, 0); close(sockpair[1]); return 0; } static int connect_slave() { sshfs.rfd = STDIN_FILENO; sshfs.wfd = STDOUT_FILENO; return 0; } static int connect_to(char *host, char *port) { int err; int sock; int opt; struct addrinfo *ai; struct addrinfo hint; memset(&hint, 0, sizeof(hint)); hint.ai_family = PF_INET; hint.ai_socktype = SOCK_STREAM; err = getaddrinfo(host, port, &hint, &ai); if (err) { fprintf(stderr, "failed to resolve %s:%s: %s\n", host, port, gai_strerror(err)); return -1; } sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); if (sock == -1) { perror("failed to create socket"); return -1; } err = connect(sock, ai->ai_addr, ai->ai_addrlen); if (err == -1) { perror("failed to connect"); return -1; } opt = 1; err = setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt)); if (err == -1) perror("warning: failed to set TCP_NODELAY"); freeaddrinfo(ai); sshfs.rfd = sock; sshfs.wfd = sock; return 0; } static int do_write(struct iovec *iov, size_t count) { int res; while (count) { res = writev(sshfs.wfd, iov, count); if (res == -1) { perror("write"); return -1; } else if (res == 0) { fprintf(stderr, "zero write\n"); return -1; } do { if ((unsigned) res < iov->iov_len) { iov->iov_len -= res; iov->iov_base += res; break; } else { res -= iov->iov_len; count --; iov ++; } } while(count); } return 0; } static uint32_t sftp_get_id(void) { static uint32_t idctr; return idctr++; } static void buf_to_iov(const struct buffer *buf, struct iovec *iov) { iov->iov_base = buf->p; iov->iov_len = buf->len; } static size_t iov_length(const struct iovec *iov, unsigned long nr_segs) { unsigned long seg; size_t ret = 0; for (seg = 0; seg < nr_segs; seg++) ret += iov[seg].iov_len; return ret; } #define SFTP_MAX_IOV 3 static int sftp_send_iov(uint8_t type, uint32_t id, struct iovec iov[], size_t count) { int res; struct buffer buf; struct iovec iovout[SFTP_MAX_IOV]; unsigned i; unsigned nout = 0; assert(count <= SFTP_MAX_IOV - 1); buf_init(&buf, 9); buf_add_uint32(&buf, iov_length(iov, count) + 5); buf_add_uint8(&buf, type); buf_add_uint32(&buf, id); buf_to_iov(&buf, &iovout[nout++]); for (i = 0; i < count; i++) iovout[nout++] = iov[i]; pthread_mutex_lock(&sshfs.lock_write); res = do_write(iovout, nout); pthread_mutex_unlock(&sshfs.lock_write); buf_free(&buf); return res; } static int do_read(struct buffer *buf) { int res; uint8_t *p = buf->p; size_t size = buf->size; while (size) { res = read(sshfs.rfd, p, size); if (res == -1) { perror("read"); return -1; } else if (res == 0) { fprintf(stderr, "remote host has disconnected\n"); return -1; } size -= res; p += res; } return 0; } static int sftp_read(uint8_t *type, struct buffer *buf) { int res; struct buffer buf2; uint32_t len; buf_init(&buf2, 5); res = do_read(&buf2); if (res != -1) { if (buf_get_uint32(&buf2, &len) == -1) return -1; if (len > MAX_REPLY_LEN) { fprintf(stderr, "reply len too large: %u\n", len); return -1; } if (buf_get_uint8(&buf2, type) == -1) return -1; buf_init(buf, len - 1); res = do_read(buf); } buf_free(&buf2); return res; } static void request_free(struct request *req) { buf_free(&req->reply); sem_destroy(&req->ready); g_free(req); } static void chunk_free(struct read_chunk *chunk) { while (!list_empty(&chunk->reqs)) { struct read_req *rreq; rreq = list_entry(chunk->reqs.prev, struct read_req, list); list_del(&rreq->list); buf_free(&rreq->data); g_free(rreq); } g_free(chunk); } static void chunk_put(struct read_chunk *chunk) { if (chunk) { chunk->refs--; if (!chunk->refs) chunk_free(chunk); } } static void chunk_put_locked(struct read_chunk *chunk) { pthread_mutex_lock(&sshfs.lock); chunk_put(chunk); pthread_mutex_unlock(&sshfs.lock); } static int clean_req(void *key_, struct request *req) { (void) key_; req->error = -EIO; if (req->want_reply) sem_post(&req->ready); else { if (req->end_func) req->end_func(req); request_free(req); } return TRUE; } static int process_one_request(void) { int res; struct buffer buf; uint8_t type; struct request *req; uint32_t id; buf_init(&buf, 0); res = sftp_read(&type, &buf); if (res == -1) return -1; if (buf_get_uint32(&buf, &id) == -1) return -1; pthread_mutex_lock(&sshfs.lock); req = (struct request *) g_hash_table_lookup(sshfs.reqtab, GUINT_TO_POINTER(id)); if (req == NULL) fprintf(stderr, "request %i not found\n", id); else { int was_over; was_over = sshfs.outstanding_len > sshfs.max_outstanding_len; sshfs.outstanding_len -= req->len; if (was_over && sshfs.outstanding_len <= sshfs.max_outstanding_len) { pthread_cond_broadcast(&sshfs.outstanding_cond); } g_hash_table_remove(sshfs.reqtab, GUINT_TO_POINTER(id)); } pthread_mutex_unlock(&sshfs.lock); if (req != NULL) { if (sshfs.debug) { struct timeval now; unsigned int difftime; unsigned msgsize = buf.size + 5; gettimeofday(&now, NULL); difftime = (now.tv_sec - req->start.tv_sec) * 1000; difftime += (now.tv_usec - req->start.tv_usec) / 1000; DEBUG(" [%05i] %14s %8ubytes (%ims)\n", id, type_name(type), msgsize, difftime); if (difftime < sshfs.min_rtt || !sshfs.num_received) sshfs.min_rtt = difftime; if (difftime > sshfs.max_rtt) sshfs.max_rtt = difftime; sshfs.total_rtt += difftime; sshfs.num_received++; sshfs.bytes_received += msgsize; } req->reply = buf; req->reply_type = type; req->replied = 1; if (req->want_reply) sem_post(&req->ready); else { if (req->end_func) { pthread_mutex_lock(&sshfs.lock); req->end_func(req); pthread_mutex_unlock(&sshfs.lock); } request_free(req); } } else buf_free(&buf); return 0; } static void close_conn(void) { close(sshfs.rfd); if (sshfs.rfd != sshfs.wfd) close(sshfs.wfd); sshfs.rfd = -1; sshfs.wfd = -1; if (sshfs.ptyfd != -1) { close(sshfs.ptyfd); sshfs.ptyfd = -1; } if (sshfs.ptyslavefd != -1) { close(sshfs.ptyslavefd); sshfs.ptyslavefd = -1; } } static void *process_requests(void *data_) { (void) data_; while (1) { if (process_one_request() == -1) break; } pthread_mutex_lock(&sshfs.lock); sshfs.processing_thread_started = 0; close_conn(); g_hash_table_foreach_remove(sshfs.reqtab, (GHRFunc) clean_req, NULL); sshfs.connver ++; sshfs.outstanding_len = 0; pthread_cond_broadcast(&sshfs.outstanding_cond); pthread_mutex_unlock(&sshfs.lock); if (!sshfs.reconnect) { /* harakiri */ kill(getpid(), SIGTERM); } return NULL; } static int sftp_init_reply_ok(struct buffer *buf, uint32_t *version) { uint32_t len; uint8_t type; if (buf_get_uint32(buf, &len) == -1) return -1; if (len < 5 || len > MAX_REPLY_LEN) return 1; if (buf_get_uint8(buf, &type) == -1) return -1; if (type != SSH_FXP_VERSION) return 1; if (buf_get_uint32(buf, version) == -1) return -1; DEBUG("Server version: %u\n", *version); if (len > 5) { struct buffer buf2; buf_init(&buf2, len - 5); if (do_read(&buf2) == -1) { buf_free(&buf2); return -1; } do { char *ext; char *extdata; if (buf_get_string(&buf2, &ext) == -1 || buf_get_string(&buf2, &extdata) == -1) { buf_free(&buf2); return -1; } DEBUG("Extension: %s <%s>\n", ext, extdata); if (strcmp(ext, SFTP_EXT_POSIX_RENAME) == 0 && strcmp(extdata, "1") == 0) { sshfs.ext_posix_rename = 1; sshfs.rename_workaround = 0; } if (strcmp(ext, SFTP_EXT_STATVFS) == 0 && strcmp(extdata, "2") == 0) sshfs.ext_statvfs = 1; if (strcmp(ext, SFTP_EXT_HARDLINK) == 0 && strcmp(extdata, "1") == 0) sshfs.ext_hardlink = 1; } while (buf2.len < buf2.size); buf_free(&buf2); } return 0; } static int sftp_find_init_reply(uint32_t *version) { int res; struct buffer buf; buf_init(&buf, 9); res = do_read(&buf); while (res != -1) { struct buffer buf2; res = sftp_init_reply_ok(&buf, version); if (res <= 0) break; /* Iterate over any rubbish until the version reply is found */ DEBUG("%c", *buf.p); memmove(buf.p, buf.p + 1, buf.size - 1); buf.len = 0; buf2.p = buf.p + buf.size - 1; buf2.size = 1; res = do_read(&buf2); } buf_free(&buf); return res; } static int sftp_init() { int res = -1; uint32_t version = 0; struct buffer buf; buf_init(&buf, 0); if (sftp_send_iov(SSH_FXP_INIT, PROTO_VERSION, NULL, 0) == -1) goto out; if (sshfs.password_stdin && pty_expect_loop() == -1) goto out; if (sftp_find_init_reply(&version) == -1) goto out; sshfs.server_version = version; if (version > PROTO_VERSION) { fprintf(stderr, "Warning: server uses version: %i, we support: %i\n", version, PROTO_VERSION); } res = 0; out: buf_free(&buf); return res; } static int sftp_error_to_errno(uint32_t error) { switch (error) { case SSH_FX_OK: return 0; case SSH_FX_NO_SUCH_FILE: return ENOENT; case SSH_FX_PERMISSION_DENIED: return EACCES; case SSH_FX_FAILURE: return EPERM; case SSH_FX_BAD_MESSAGE: return EBADMSG; case SSH_FX_NO_CONNECTION: return ENOTCONN; case SSH_FX_CONNECTION_LOST: return ECONNABORTED; case SSH_FX_OP_UNSUPPORTED: return EOPNOTSUPP; default: return EIO; } } static void sftp_detect_uid() { int flags; uint32_t id = sftp_get_id(); uint32_t replid; uint8_t type; struct buffer buf; struct stat stbuf; struct iovec iov[1]; buf_init(&buf, 5); buf_add_string(&buf, "."); buf_to_iov(&buf, &iov[0]); if (sftp_send_iov(SSH_FXP_STAT, id, iov, 1) == -1) goto out; buf_clear(&buf); if (sftp_read(&type, &buf) == -1) goto out; if (type != SSH_FXP_ATTRS && type != SSH_FXP_STATUS) { fprintf(stderr, "protocol error\n"); goto out; } if (buf_get_uint32(&buf, &replid) == -1) goto out; if (replid != id) { fprintf(stderr, "bad reply ID\n"); goto out; } if (type == SSH_FXP_STATUS) { uint32_t serr; if (buf_get_uint32(&buf, &serr) == -1) goto out; fprintf(stderr, "failed to stat home directory (%i)\n", serr); goto out; } if (buf_get_attrs(&buf, &stbuf, &flags) != 0) goto out; if (!(flags & SSH_FILEXFER_ATTR_UIDGID)) goto out; sshfs.remote_uid = stbuf.st_uid; sshfs.local_uid = getuid(); sshfs.remote_uid_detected = 1; DEBUG("remote_uid = %i\n", sshfs.remote_uid); out: if (!sshfs.remote_uid_detected) fprintf(stderr, "failed to detect remote user ID\n"); buf_free(&buf); } static int sftp_check_root(const char *base_path) { int flags; uint32_t id = sftp_get_id(); uint32_t replid; uint8_t type; struct buffer buf; struct stat stbuf; struct iovec iov[1]; int err = -1; const char *remote_dir = base_path[0] ? base_path : "."; buf_init(&buf, 0); buf_add_string(&buf, remote_dir); buf_to_iov(&buf, &iov[0]); if (sftp_send_iov(SSH_FXP_LSTAT, id, iov, 1) == -1) goto out; buf_clear(&buf); if (sftp_read(&type, &buf) == -1) goto out; if (type != SSH_FXP_ATTRS && type != SSH_FXP_STATUS) { fprintf(stderr, "protocol error\n"); goto out; } if (buf_get_uint32(&buf, &replid) == -1) goto out; if (replid != id) { fprintf(stderr, "bad reply ID\n"); goto out; } if (type == SSH_FXP_STATUS) { uint32_t serr; if (buf_get_uint32(&buf, &serr) == -1) goto out; fprintf(stderr, "%s:%s: %s\n", sshfs.host, remote_dir, strerror(sftp_error_to_errno(serr))); goto out; } int err2 = buf_get_attrs(&buf, &stbuf, &flags); if (err2) { err = err2; goto out; } if (!(flags & SSH_FILEXFER_ATTR_PERMISSIONS)) goto out; if (S_ISDIR(sshfs.mnt_mode) && !S_ISDIR(stbuf.st_mode)) { fprintf(stderr, "%s:%s: Not a directory\n", sshfs.host, remote_dir); goto out; } if ((sshfs.mnt_mode ^ stbuf.st_mode) & S_IFMT) { fprintf(stderr, "%s:%s: type of file differs from mountpoint\n", sshfs.host, remote_dir); goto out; } err = 0; out: buf_free(&buf); return err; } static int connect_remote(void) { int err; if (sshfs.slave) err = connect_slave(); else if (sshfs.directport) err = connect_to(sshfs.host, sshfs.directport); else err = start_ssh(); if (!err) err = sftp_init(); if (err) close_conn(); else sshfs.num_connect++; return err; } static int start_processing_thread(void) { int err; pthread_t thread_id; sigset_t oldset; sigset_t newset; if (sshfs.processing_thread_started) return 0; if (sshfs.rfd == -1) { err = connect_remote(); if (err) return -EIO; } if (sshfs.detect_uid) { sftp_detect_uid(); sshfs.detect_uid = 0; } sigemptyset(&newset); sigaddset(&newset, SIGTERM); sigaddset(&newset, SIGINT); sigaddset(&newset, SIGHUP); sigaddset(&newset, SIGQUIT); pthread_sigmask(SIG_BLOCK, &newset, &oldset); err = pthread_create(&thread_id, NULL, process_requests, NULL); if (err) { fprintf(stderr, "failed to create thread: %s\n", strerror(err)); return -EIO; } pthread_detach(thread_id); pthread_sigmask(SIG_SETMASK, &oldset, NULL); sshfs.processing_thread_started = 1; return 0; } #if FUSE_VERSION >= 26 static void *sshfs_init(struct fuse_conn_info *conn) #else static void *sshfs_init(void) #endif { #if FUSE_VERSION >= 26 /* Readahead should be done by kernel or sshfs but not both */ if (conn->async_read) sshfs.sync_read = 1; #endif if (!sshfs.delay_connect) start_processing_thread(); return NULL; } static int sftp_request_wait(struct request *req, uint8_t type, uint8_t expect_type, struct buffer *outbuf) { int err; if (req->error) { err = req->error; goto out; } while (sem_wait(&req->ready)); if (req->error) { err = req->error; goto out; } err = -EIO; if (req->reply_type != expect_type && req->reply_type != SSH_FXP_STATUS) { fprintf(stderr, "protocol error\n"); goto out; } if (req->reply_type == SSH_FXP_STATUS) { uint32_t serr; if (buf_get_uint32(&req->reply, &serr) == -1) goto out; switch (serr) { case SSH_FX_OK: if (expect_type == SSH_FXP_STATUS) err = 0; else err = -EIO; break; case SSH_FX_EOF: if (type == SSH_FXP_READ || type == SSH_FXP_READDIR) err = MY_EOF; else err = -EIO; break; case SSH_FX_FAILURE: if (type == SSH_FXP_RMDIR) err = -ENOTEMPTY; else err = -EPERM; break; default: err = -sftp_error_to_errno(serr); } } else { buf_init(outbuf, req->reply.size - req->reply.len); buf_get_mem(&req->reply, outbuf->p, outbuf->size); err = 0; } out: if (req->end_func) { pthread_mutex_lock(&sshfs.lock); req->end_func(req); pthread_mutex_unlock(&sshfs.lock); } request_free(req); return err; } static int sftp_request_send(uint8_t type, struct iovec *iov, size_t count, request_func begin_func, request_func end_func, int want_reply, void *data, struct request **reqp) { int err; uint32_t id; struct request *req = g_new0(struct request, 1); req->want_reply = want_reply; req->end_func = end_func; req->data = data; sem_init(&req->ready, 0, 0); buf_init(&req->reply, 0); pthread_mutex_lock(&sshfs.lock); if (begin_func) begin_func(req); id = sftp_get_id(); req->id = id; err = start_processing_thread(); if (err) { pthread_mutex_unlock(&sshfs.lock); goto out; } req->len = iov_length(iov, count) + 9; sshfs.outstanding_len += req->len; while (sshfs.outstanding_len > sshfs.max_outstanding_len) pthread_cond_wait(&sshfs.outstanding_cond, &sshfs.lock); g_hash_table_insert(sshfs.reqtab, GUINT_TO_POINTER(id), req); if (sshfs.debug) { gettimeofday(&req->start, NULL); sshfs.num_sent++; sshfs.bytes_sent += req->len; } DEBUG("[%05i] %s\n", id, type_name(type)); pthread_mutex_unlock(&sshfs.lock); err = -EIO; if (sftp_send_iov(type, id, iov, count) == -1) { gboolean rmed; pthread_mutex_lock(&sshfs.lock); rmed = g_hash_table_remove(sshfs.reqtab, GUINT_TO_POINTER(id)); pthread_mutex_unlock(&sshfs.lock); if (!rmed && !want_reply) { /* request already freed */ return err; } goto out; } if (want_reply) *reqp = req; return 0; out: req->error = err; if (!want_reply) sftp_request_wait(req, type, 0, NULL); else *reqp = req; return err; } static int sftp_request_iov(uint8_t type, struct iovec *iov, size_t count, uint8_t expect_type, struct buffer *outbuf) { int err; struct request *req; err = sftp_request_send(type, iov, count, NULL, NULL, expect_type, NULL, &req); if (expect_type == 0) return err; return sftp_request_wait(req, type, expect_type, outbuf); } static int sftp_request(uint8_t type, const struct buffer *buf, uint8_t expect_type, struct buffer *outbuf) { struct iovec iov; buf_to_iov(buf, &iov); return sftp_request_iov(type, &iov, 1, expect_type, outbuf); } static int sshfs_getattr(const char *path, struct stat *stbuf) { int err; struct buffer buf; struct buffer outbuf; buf_init(&buf, 0); buf_add_path(&buf, path); err = sftp_request(sshfs.follow_symlinks ? SSH_FXP_STAT : SSH_FXP_LSTAT, &buf, SSH_FXP_ATTRS, &outbuf); if (!err) { err = buf_get_attrs(&outbuf, stbuf, NULL); buf_free(&outbuf); } buf_free(&buf); return err; } static int count_components(const char *p) { int ctr; for (; *p == '/'; p++); for (ctr = 0; *p; ctr++) { for (; *p && *p != '/'; p++); for (; *p == '/'; p++); } return ctr; } static void strip_common(const char **sp, const char **tp) { const char *s = *sp; const char *t = *tp; do { for (; *s == '/'; s++); for (; *t == '/'; t++); *tp = t; *sp = s; for (; *s == *t && *s && *s != '/'; s++, t++); } while ((*s == *t && *s) || (!*s && *t == '/') || (*s == '/' && !*t)); } static void transform_symlink(const char *path, char **linkp) { const char *l = *linkp; const char *b = sshfs.base_path; char *newlink; char *s; int dotdots; int i; if (l[0] != '/' || b[0] != '/') return; strip_common(&l, &b); if (*b) return; strip_common(&l, &path); dotdots = count_components(path); if (!dotdots) return; dotdots--; newlink = malloc(dotdots * 3 + strlen(l) + 2); if (!newlink) { fprintf(stderr, "sshfs: memory allocation failed\n"); abort(); } for (s = newlink, i = 0; i < dotdots; i++, s += 3) strcpy(s, "../"); if (l[0]) strcpy(s, l); else if (!dotdots) strcpy(s, "."); else s[0] = '\0'; free(*linkp); *linkp = newlink; } static int sshfs_readlink(const char *path, char *linkbuf, size_t size) { int err; struct buffer buf; struct buffer name; assert(size > 0); if (sshfs.server_version < 3) return -EPERM; buf_init(&buf, 0); buf_add_path(&buf, path); err = sftp_request(SSH_FXP_READLINK, &buf, SSH_FXP_NAME, &name); if (!err) { uint32_t count; char *link; err = -EIO; if(buf_get_uint32(&name, &count) != -1 && count == 1 && buf_get_string(&name, &link) != -1) { if (sshfs.transform_symlinks) transform_symlink(path, &link); strncpy(linkbuf, link, size - 1); linkbuf[size - 1] = '\0'; free(link); err = 0; } buf_free(&name); } buf_free(&buf); return err; } static int sftp_readdir_send(struct request **req, struct buffer *handle) { struct iovec iov; buf_to_iov(handle, &iov); return sftp_request_send(SSH_FXP_READDIR, &iov, 1, NULL, NULL, SSH_FXP_NAME, NULL, req); } static int sshfs_req_pending(struct request *req) { if (g_hash_table_lookup(sshfs.reqtab, GUINT_TO_POINTER(req->id))) return 1; else return 0; } static int sftp_readdir_async(struct buffer *handle, fuse_cache_dirh_t h, fuse_cache_dirfil_t filler) { int err = 0; int outstanding = 0; int max = READDIR_START; GList *list = NULL; int done = 0; while (!done || outstanding) { struct request *req; struct buffer name; int tmperr; while (!done && outstanding < max) { tmperr = sftp_readdir_send(&req, handle); if (tmperr && !done) { err = tmperr; done = 1; break; } list = g_list_append(list, req); outstanding++; } if (outstanding) { GList *first; /* wait for response to next request */ first = g_list_first(list); req = first->data; list = g_list_delete_link(list, first); outstanding--; if (done) { pthread_mutex_lock(&sshfs.lock); if (sshfs_req_pending(req)) req->want_reply = 0; pthread_mutex_unlock(&sshfs.lock); if (!req->want_reply) continue; } tmperr = sftp_request_wait(req, SSH_FXP_READDIR, SSH_FXP_NAME, &name); if (tmperr && !done) { err = tmperr; if (err == MY_EOF) err = 0; done = 1; } if (!done) { err = buf_get_entries(&name, h, filler); buf_free(&name); /* increase number of outstanding requests */ if (max < READDIR_MAX) max++; if (err) done = 1; } } } assert(list == NULL); return err; } static int sftp_readdir_sync(struct buffer *handle, fuse_cache_dirh_t h, fuse_cache_dirfil_t filler) { int err; do { struct buffer name; err = sftp_request(SSH_FXP_READDIR, handle, SSH_FXP_NAME, &name); if (!err) { err = buf_get_entries(&name, h, filler); buf_free(&name); } } while (!err); if (err == MY_EOF) err = 0; return err; } static int sshfs_getdir(const char *path, fuse_cache_dirh_t h, fuse_cache_dirfil_t filler) { int err; struct buffer buf; struct buffer handle; buf_init(&buf, 0); buf_add_path(&buf, path); err = sftp_request(SSH_FXP_OPENDIR, &buf, SSH_FXP_HANDLE, &handle); if (!err) { int err2; buf_finish(&handle); if (sshfs.sync_readdir) err = sftp_readdir_sync(&handle, h, filler); else err = sftp_readdir_async(&handle, h, filler); err2 = sftp_request(SSH_FXP_CLOSE, &handle, 0, NULL); if (!err) err = err2; buf_free(&handle); } buf_free(&buf); return err; } static int sshfs_mkdir(const char *path, mode_t mode) { int err; struct buffer buf; buf_init(&buf, 0); buf_add_path(&buf, path); buf_add_uint32(&buf, SSH_FILEXFER_ATTR_PERMISSIONS); buf_add_uint32(&buf, mode); err = sftp_request(SSH_FXP_MKDIR, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); return err; } static int sshfs_mknod(const char *path, mode_t mode, dev_t rdev) { int err; struct buffer buf; struct buffer handle; (void) rdev; if ((mode & S_IFMT) != S_IFREG) return -EPERM; buf_init(&buf, 0); buf_add_path(&buf, path); buf_add_uint32(&buf, SSH_FXF_WRITE | SSH_FXF_CREAT | SSH_FXF_EXCL); buf_add_uint32(&buf, SSH_FILEXFER_ATTR_PERMISSIONS); buf_add_uint32(&buf, mode); err = sftp_request(SSH_FXP_OPEN, &buf, SSH_FXP_HANDLE, &handle); if (!err) { int err2; buf_finish(&handle); err2 = sftp_request(SSH_FXP_CLOSE, &handle, SSH_FXP_STATUS, NULL); if (!err) err = err2; buf_free(&handle); } buf_free(&buf); return err; } static int sshfs_symlink(const char *from, const char *to) { int err; struct buffer buf; if (sshfs.server_version < 3) return -EPERM; /* openssh sftp server doesn't follow standard: link target and link name are mixed up, so we must also be non-standard :( */ buf_init(&buf, 0); buf_add_string(&buf, from); buf_add_path(&buf, to); err = sftp_request(SSH_FXP_SYMLINK, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); return err; } static int sshfs_unlink(const char *path) { int err; struct buffer buf; buf_init(&buf, 0); buf_add_path(&buf, path); err = sftp_request(SSH_FXP_REMOVE, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); return err; } static int sshfs_rmdir(const char *path) { int err; struct buffer buf; buf_init(&buf, 0); buf_add_path(&buf, path); err = sftp_request(SSH_FXP_RMDIR, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); return err; } static int sshfs_do_rename(const char *from, const char *to) { int err; struct buffer buf; buf_init(&buf, 0); buf_add_path(&buf, from); buf_add_path(&buf, to); err = sftp_request(SSH_FXP_RENAME, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); return err; } static int sshfs_ext_posix_rename(const char *from, const char *to) { int err; struct buffer buf; buf_init(&buf, 0); buf_add_string(&buf, SFTP_EXT_POSIX_RENAME); buf_add_path(&buf, from); buf_add_path(&buf, to); err = sftp_request(SSH_FXP_EXTENDED, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); return err; } static void random_string(char *str, int length) { int i; for (i = 0; i < length; i++) *str++ = (char)('0' + rand_r(&sshfs.randseed) % 10); *str = '\0'; } static int sshfs_rename(const char *from, const char *to) { int err; if (sshfs.ext_posix_rename) err = sshfs_ext_posix_rename(from, to); else err = sshfs_do_rename(from, to); if (err == -EPERM && sshfs.rename_workaround) { size_t tolen = strlen(to); if (tolen + RENAME_TEMP_CHARS < PATH_MAX) { int tmperr; char totmp[PATH_MAX]; strcpy(totmp, to); random_string(totmp + tolen, RENAME_TEMP_CHARS); tmperr = sshfs_do_rename(to, totmp); if (!tmperr) { err = sshfs_do_rename(from, to); if (!err) err = sshfs_unlink(totmp); else sshfs_do_rename(totmp, to); } } } return err; } static int sshfs_link(const char *from, const char *to) { int err = -ENOSYS; if (sshfs.ext_hardlink && !sshfs.disable_hardlink) { struct buffer buf; buf_init(&buf, 0); buf_add_string(&buf, SFTP_EXT_HARDLINK); buf_add_path(&buf, from); buf_add_path(&buf, to); err = sftp_request(SSH_FXP_EXTENDED, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); } return err; } static int sshfs_chmod(const char *path, mode_t mode) { int err; struct buffer buf; buf_init(&buf, 0); buf_add_path(&buf, path); buf_add_uint32(&buf, SSH_FILEXFER_ATTR_PERMISSIONS); buf_add_uint32(&buf, mode); /* FIXME: really needs LSETSTAT extension (debian Bug#640038) */ err = sftp_request(SSH_FXP_SETSTAT, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); return err; } static int sshfs_chown(const char *path, uid_t uid, gid_t gid) { int err; struct buffer buf; if (sshfs.remote_uid_detected && uid == sshfs.local_uid) uid = sshfs.remote_uid; if (sshfs.idmap == IDMAP_FILE && sshfs.r_uid_map) if(translate_id(&uid, sshfs.r_uid_map) == -1) return -EPERM; if (sshfs.idmap == IDMAP_FILE && sshfs.r_gid_map) if (translate_id(&gid, sshfs.r_gid_map) == -1) return -EPERM; buf_init(&buf, 0); buf_add_path(&buf, path); buf_add_uint32(&buf, SSH_FILEXFER_ATTR_UIDGID); buf_add_uint32(&buf, uid); buf_add_uint32(&buf, gid); err = sftp_request(SSH_FXP_SETSTAT, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); return err; } static int sshfs_truncate_workaround(const char *path, off_t size, struct fuse_file_info *fi); static void sshfs_inc_modifver(void) { pthread_mutex_lock(&sshfs.lock); sshfs.modifver++; pthread_mutex_unlock(&sshfs.lock); } static int sshfs_truncate(const char *path, off_t size) { int err; struct buffer buf; sshfs_inc_modifver(); if (size == 0 || sshfs.truncate_workaround) return sshfs_truncate_workaround(path, size, NULL); buf_init(&buf, 0); buf_add_path(&buf, path); buf_add_uint32(&buf, SSH_FILEXFER_ATTR_SIZE); buf_add_uint64(&buf, size); err = sftp_request(SSH_FXP_SETSTAT, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); return err; } static int sshfs_utime(const char *path, struct utimbuf *ubuf) { int err; struct buffer buf; buf_init(&buf, 0); buf_add_path(&buf, path); buf_add_uint32(&buf, SSH_FILEXFER_ATTR_ACMODTIME); buf_add_uint32(&buf, ubuf->actime); buf_add_uint32(&buf, ubuf->modtime); err = sftp_request(SSH_FXP_SETSTAT, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); return err; } static inline int sshfs_file_is_conn(struct sshfs_file *sf) { int ret; pthread_mutex_lock(&sshfs.lock); ret = (sf->connver == sshfs.connver); pthread_mutex_unlock(&sshfs.lock); return ret; } static int sshfs_open_common(const char *path, mode_t mode, struct fuse_file_info *fi) { int err; int err2; struct buffer buf; struct buffer outbuf; struct stat stbuf; struct sshfs_file *sf; struct request *open_req; uint32_t pflags = 0; struct iovec iov; uint8_t type; uint64_t wrctr = cache_get_write_ctr(); if ((fi->flags & O_ACCMODE) == O_RDONLY) pflags = SSH_FXF_READ; else if((fi->flags & O_ACCMODE) == O_WRONLY) pflags = SSH_FXF_WRITE; else if ((fi->flags & O_ACCMODE) == O_RDWR) pflags = SSH_FXF_READ | SSH_FXF_WRITE; else return -EINVAL; if (fi->flags & O_CREAT) pflags |= SSH_FXF_CREAT; if (fi->flags & O_EXCL) pflags |= SSH_FXF_EXCL; if (fi->flags & O_TRUNC) pflags |= SSH_FXF_TRUNC; sf = g_new0(struct sshfs_file, 1); list_init(&sf->write_reqs); pthread_cond_init(&sf->write_finished, NULL); /* Assume random read after open */ sf->is_seq = 0; sf->refs = 1; sf->next_pos = 0; pthread_mutex_lock(&sshfs.lock); sf->modifver= sshfs.modifver; sf->connver = sshfs.connver; pthread_mutex_unlock(&sshfs.lock); buf_init(&buf, 0); buf_add_path(&buf, path); buf_add_uint32(&buf, pflags); buf_add_uint32(&buf, SSH_FILEXFER_ATTR_PERMISSIONS); buf_add_uint32(&buf, mode); buf_to_iov(&buf, &iov); sftp_request_send(SSH_FXP_OPEN, &iov, 1, NULL, NULL, 1, NULL, &open_req); buf_clear(&buf); buf_add_path(&buf, path); type = sshfs.follow_symlinks ? SSH_FXP_STAT : SSH_FXP_LSTAT; err2 = sftp_request(type, &buf, SSH_FXP_ATTRS, &outbuf); if (!err2) { err2 = buf_get_attrs(&outbuf, &stbuf, NULL); buf_free(&outbuf); } err = sftp_request_wait(open_req, SSH_FXP_OPEN, SSH_FXP_HANDLE, &sf->handle); if (!err && err2) { buf_finish(&sf->handle); sftp_request(SSH_FXP_CLOSE, &sf->handle, 0, NULL); buf_free(&sf->handle); err = err2; } if (!err) { cache_add_attr(path, &stbuf, wrctr); buf_finish(&sf->handle); fi->fh = (unsigned long) sf; } else { cache_invalidate(path); g_free(sf); } buf_free(&buf); return err; } static int sshfs_open(const char *path, struct fuse_file_info *fi) { return sshfs_open_common(path, 0, fi); } static inline struct sshfs_file *get_sshfs_file(struct fuse_file_info *fi) { return (struct sshfs_file *) (uintptr_t) fi->fh; } static int sshfs_flush(const char *path, struct fuse_file_info *fi) { int err; struct sshfs_file *sf = get_sshfs_file(fi); struct list_head write_reqs; struct list_head *curr_list; if (!sshfs_file_is_conn(sf)) return -EIO; if (sshfs.sync_write) return 0; (void) path; pthread_mutex_lock(&sshfs.lock); if (!list_empty(&sf->write_reqs)) { curr_list = sf->write_reqs.prev; list_del(&sf->write_reqs); list_init(&sf->write_reqs); list_add(&write_reqs, curr_list); while (!list_empty(&write_reqs)) pthread_cond_wait(&sf->write_finished, &sshfs.lock); } err = sf->write_error; sf->write_error = 0; pthread_mutex_unlock(&sshfs.lock); return err; } static int sshfs_fsync(const char *path, int isdatasync, struct fuse_file_info *fi) { (void) isdatasync; return sshfs_flush(path, fi); } static void sshfs_file_put(struct sshfs_file *sf) { sf->refs--; if (!sf->refs) g_free(sf); } static void sshfs_file_get(struct sshfs_file *sf) { sf->refs++; } static int sshfs_release(const char *path, struct fuse_file_info *fi) { struct sshfs_file *sf = get_sshfs_file(fi); struct buffer *handle = &sf->handle; if (sshfs_file_is_conn(sf)) { sshfs_flush(path, fi); sftp_request(SSH_FXP_CLOSE, handle, 0, NULL); } buf_free(handle); chunk_put_locked(sf->readahead); sshfs_file_put(sf); return 0; } static void sshfs_read_end(struct request *req) { struct read_req *rreq = (struct read_req *) req->data; if (req->error) rreq->res = req->error; else if (req->replied) { rreq->res = -EIO; if (req->reply_type == SSH_FXP_STATUS) { uint32_t serr; if (buf_get_uint32(&req->reply, &serr) != -1) { if (serr == SSH_FX_EOF) rreq->res = 0; else rreq->res = -sftp_error_to_errno(serr); } } else if (req->reply_type == SSH_FXP_DATA) { uint32_t retsize; if (buf_get_uint32(&req->reply, &retsize) != -1) { if (retsize > rreq->size) { fprintf(stderr, "long read\n"); } else if (buf_check_get(&req->reply, retsize) != -1) { rreq->res = retsize; rreq->data = req->reply; buf_init(&req->reply, 0); } } } else { fprintf(stderr, "protocol error\n"); } } else { rreq->res = -EIO; } rreq->sio->num_reqs--; if (!rreq->sio->num_reqs) pthread_cond_broadcast(&rreq->sio->finished); } static void sshfs_read_begin(struct request *req) { struct read_req *rreq = (struct read_req *) req->data; rreq->sio->num_reqs++; } static struct read_chunk *sshfs_send_read(struct sshfs_file *sf, size_t size, off_t offset) { struct read_chunk *chunk = g_new0(struct read_chunk, 1); struct buffer *handle = &sf->handle; pthread_cond_init(&chunk->sio.finished, NULL); list_init(&chunk->reqs); chunk->size = size; chunk->offset = offset; chunk->refs = 1; while (size) { int err; struct buffer buf; struct iovec iov[1]; struct read_req *rreq; size_t bsize = size < sshfs.max_read ? size : sshfs.max_read; rreq = g_new0(struct read_req, 1); rreq->sio = &chunk->sio; rreq->size = bsize; buf_init(&rreq->data, 0); list_add(&rreq->list, &chunk->reqs); buf_init(&buf, 0); buf_add_buf(&buf, handle); buf_add_uint64(&buf, offset); buf_add_uint32(&buf, bsize); buf_to_iov(&buf, &iov[0]); err = sftp_request_send(SSH_FXP_READ, iov, 1, sshfs_read_begin, sshfs_read_end, 0, rreq, NULL); buf_free(&buf); if (err) break; size -= bsize; offset += bsize; } return chunk; } static int wait_chunk(struct read_chunk *chunk, char *buf, size_t size) { int res = 0; struct read_req *rreq; pthread_mutex_lock(&sshfs.lock); while (chunk->sio.num_reqs) pthread_cond_wait(&chunk->sio.finished, &sshfs.lock); pthread_mutex_unlock(&sshfs.lock); if (chunk->sio.error) { if (chunk->sio.error != MY_EOF) res = chunk->sio.error; goto out; } while (!list_empty(&chunk->reqs) && size) { rreq = list_entry(chunk->reqs.prev, struct read_req, list); if (rreq->res < 0) { chunk->sio.error = rreq->res; break; } if (rreq->res == 0) { chunk->sio.error = MY_EOF; break; } else if (size < (size_t) rreq->res) { buf_get_mem(&rreq->data, buf, size); rreq->res -= size; rreq->size -= size; res += size; break; } else { buf_get_mem(&rreq->data, buf, rreq->res); res += rreq->res; if ((size_t) rreq->res < rreq->size) { chunk->sio.error = MY_EOF; break; } buf += rreq->res; size -= rreq->res; list_del(&rreq->list); buf_free(&rreq->data); g_free(rreq); } } if (res > 0) { chunk->offset += res; chunk->size -= res; } out: chunk_put_locked(chunk); return res; } static int sshfs_sync_read(struct sshfs_file *sf, char *buf, size_t size, off_t offset) { struct read_chunk *chunk; chunk = sshfs_send_read(sf, size, offset); return wait_chunk(chunk, buf, size); } static void submit_read(struct sshfs_file *sf, size_t size, off_t offset, struct read_chunk **chunkp) { struct read_chunk *chunk; chunk = sshfs_send_read(sf, size, offset); pthread_mutex_lock(&sshfs.lock); chunk->modifver = sshfs.modifver; chunk_put(*chunkp); *chunkp = chunk; chunk->refs++; pthread_mutex_unlock(&sshfs.lock); } static struct read_chunk *search_read_chunk(struct sshfs_file *sf, off_t offset) { struct read_chunk *ch = sf->readahead; if (ch && ch->offset == offset && ch->modifver == sshfs.modifver) { ch->refs++; return ch; } else return NULL; } static int sshfs_async_read(struct sshfs_file *sf, char *rbuf, size_t size, off_t offset) { int res = 0; size_t total = 0; struct read_chunk *chunk; struct read_chunk *chunk_prev = NULL; size_t origsize = size; int curr_is_seq; pthread_mutex_lock(&sshfs.lock); curr_is_seq = sf->is_seq; sf->is_seq = (sf->next_pos == offset && sf->modifver == sshfs.modifver); sf->next_pos = offset + size; sf->modifver = sshfs.modifver; chunk = search_read_chunk(sf, offset); pthread_mutex_unlock(&sshfs.lock); if (chunk && chunk->size < size) { chunk_prev = chunk; size -= chunk->size; offset += chunk->size; chunk = NULL; } if (!chunk) submit_read(sf, size, offset, &chunk); if (curr_is_seq && chunk && chunk->size <= size) submit_read(sf, origsize, offset + size, &sf->readahead); if (chunk_prev) { size_t prev_size = chunk_prev->size; res = wait_chunk(chunk_prev, rbuf, prev_size); if (res < (int) prev_size) { chunk_put_locked(chunk); return res; } rbuf += res; total += res; } res = wait_chunk(chunk, rbuf, size); if (res > 0) total += res; if (res < 0) return res; return total; } static int sshfs_read(const char *path, char *rbuf, size_t size, off_t offset, struct fuse_file_info *fi) { struct sshfs_file *sf = get_sshfs_file(fi); (void) path; if (!sshfs_file_is_conn(sf)) return -EIO; if (sshfs.sync_read) return sshfs_sync_read(sf, rbuf, size, offset); else return sshfs_async_read(sf, rbuf, size, offset); } static void sshfs_write_begin(struct request *req) { struct sshfs_file *sf = (struct sshfs_file *) req->data; sshfs_file_get(sf); list_add(&req->list, &sf->write_reqs); } static void sshfs_write_end(struct request *req) { uint32_t serr; struct sshfs_file *sf = (struct sshfs_file *) req->data; if (req->error) sf->write_error = req->error; else if (req->replied) { if (req->reply_type != SSH_FXP_STATUS) { fprintf(stderr, "protocol error\n"); } else if (buf_get_uint32(&req->reply, &serr) != -1 && serr != SSH_FX_OK) { sf->write_error = -EIO; } } list_del(&req->list); pthread_cond_broadcast(&sf->write_finished); sshfs_file_put(sf); } static int sshfs_async_write(struct sshfs_file *sf, const char *wbuf, size_t size, off_t offset) { int err = 0; struct buffer *handle = &sf->handle; while (!err && size) { struct buffer buf; struct iovec iov[2]; size_t bsize = size < sshfs.max_write ? size : sshfs.max_write; buf_init(&buf, 0); buf_add_buf(&buf, handle); buf_add_uint64(&buf, offset); buf_add_uint32(&buf, bsize); buf_to_iov(&buf, &iov[0]); iov[1].iov_base = (void *) wbuf; iov[1].iov_len = bsize; err = sftp_request_send(SSH_FXP_WRITE, iov, 2, sshfs_write_begin, sshfs_write_end, 0, sf, NULL); buf_free(&buf); size -= bsize; wbuf += bsize; offset += bsize; } return err; } static void sshfs_sync_write_begin(struct request *req) { struct sshfs_io *sio = (struct sshfs_io *) req->data; sio->num_reqs++; } static void sshfs_sync_write_end(struct request *req) { uint32_t serr; struct sshfs_io *sio = (struct sshfs_io *) req->data; if (req->error) { sio->error = req->error; } else if (req->replied) { if (req->reply_type != SSH_FXP_STATUS) { fprintf(stderr, "protocol error\n"); } else if (buf_get_uint32(&req->reply, &serr) != -1 && serr != SSH_FX_OK) { sio->error = -EIO; } } sio->num_reqs--; if (!sio->num_reqs) pthread_cond_broadcast(&sio->finished); } static int sshfs_sync_write(struct sshfs_file *sf, const char *wbuf, size_t size, off_t offset) { int err = 0; struct buffer *handle = &sf->handle; struct sshfs_io sio = { .error = 0, .num_reqs = 0 }; pthread_cond_init(&sio.finished, NULL); while (!err && size) { struct buffer buf; struct iovec iov[2]; size_t bsize = size < sshfs.max_write ? size : sshfs.max_write; buf_init(&buf, 0); buf_add_buf(&buf, handle); buf_add_uint64(&buf, offset); buf_add_uint32(&buf, bsize); buf_to_iov(&buf, &iov[0]); iov[1].iov_base = (void *) wbuf; iov[1].iov_len = bsize; err = sftp_request_send(SSH_FXP_WRITE, iov, 2, sshfs_sync_write_begin, sshfs_sync_write_end, 0, &sio, NULL); buf_free(&buf); size -= bsize; wbuf += bsize; offset += bsize; } pthread_mutex_lock(&sshfs.lock); while (sio.num_reqs) pthread_cond_wait(&sio.finished, &sshfs.lock); pthread_mutex_unlock(&sshfs.lock); if (!err) err = sio.error; return err; } static int sshfs_write(const char *path, const char *wbuf, size_t size, off_t offset, struct fuse_file_info *fi) { int err; struct sshfs_file *sf = get_sshfs_file(fi); (void) path; if (!sshfs_file_is_conn(sf)) return -EIO; sshfs_inc_modifver(); if (!sshfs.sync_write && !sf->write_error) err = sshfs_async_write(sf, wbuf, size, offset); else err = sshfs_sync_write(sf, wbuf, size, offset); return err ? err : (int) size; } static int sshfs_ext_statvfs(const char *path, struct statvfs *stbuf) { int err; struct buffer buf; struct buffer outbuf; buf_init(&buf, 0); buf_add_string(&buf, SFTP_EXT_STATVFS); buf_add_path(&buf, path); err = sftp_request(SSH_FXP_EXTENDED, &buf, SSH_FXP_EXTENDED_REPLY, &outbuf); if (!err) { if (buf_get_statvfs(&outbuf, stbuf) == -1) err = -EIO; buf_free(&outbuf); } buf_free(&buf); return err; } #if FUSE_VERSION >= 25 static int sshfs_statfs(const char *path, struct statvfs *buf) { if (sshfs.ext_statvfs) return sshfs_ext_statvfs(path, buf); buf->f_namemax = 255; buf->f_bsize = sshfs.blksize; /* * df seems to use f_bsize instead of f_frsize, so make them * the same */ buf->f_frsize = buf->f_bsize; buf->f_blocks = buf->f_bfree = buf->f_bavail = 1000ULL * 1024 * 1024 * 1024 / buf->f_frsize; buf->f_files = buf->f_ffree = 1000000000; return 0; } #else static int sshfs_statfs(const char *path, struct statfs *buf) { if (sshfs.ext_statvfs) { int err; struct statvfs vbuf; err = sshfs_ext_statvfs(path, &vbuf); if (!err) { buf->f_bsize = vbuf.f_bsize; buf->f_blocks = vbuf.f_blocks; buf->f_bfree = vbuf.f_bfree; buf->f_bavail = vbuf.f_bavail; buf->f_files = vbuf.f_files; buf->f_ffree = vbuf.f_ffree; buf->f_namelen = vbuf.f_namemax; } return err; } buf->f_namelen = 255; buf->f_bsize = sshfs.blksize; buf->f_blocks = buf->f_bfree = buf->f_bavail = 1000ULL * 1024 * 1024 * 1024 / buf->f_bsize; buf->f_files = buf->f_ffree = 1000000000; return 0; } #endif #if FUSE_VERSION >= 25 static int sshfs_create(const char *path, mode_t mode, struct fuse_file_info *fi) { return sshfs_open_common(path, mode, fi); } static int sshfs_ftruncate(const char *path, off_t size, struct fuse_file_info *fi) { int err; struct buffer buf; struct sshfs_file *sf = get_sshfs_file(fi); (void) path; if (!sshfs_file_is_conn(sf)) return -EIO; sshfs_inc_modifver(); if (sshfs.truncate_workaround) return sshfs_truncate_workaround(path, size, fi); buf_init(&buf, 0); buf_add_buf(&buf, &sf->handle); buf_add_uint32(&buf, SSH_FILEXFER_ATTR_SIZE); buf_add_uint64(&buf, size); err = sftp_request(SSH_FXP_FSETSTAT, &buf, SSH_FXP_STATUS, NULL); buf_free(&buf); return err; } #endif static int sshfs_fgetattr(const char *path, struct stat *stbuf, struct fuse_file_info *fi) { int err; struct buffer buf; struct buffer outbuf; struct sshfs_file *sf = get_sshfs_file(fi); (void) path; if (!sshfs_file_is_conn(sf)) return -EIO; if (sshfs.fstat_workaround) return sshfs_getattr(path, stbuf); buf_init(&buf, 0); buf_add_buf(&buf, &sf->handle); err = sftp_request(SSH_FXP_FSTAT, &buf, SSH_FXP_ATTRS, &outbuf); if (!err) { err = buf_get_attrs(&outbuf, stbuf, NULL); buf_free(&outbuf); } buf_free(&buf); return err; } static int sshfs_truncate_zero(const char *path) { int err; struct fuse_file_info fi; fi.flags = O_WRONLY | O_TRUNC; err = sshfs_open(path, &fi); if (!err) sshfs_release(path, &fi); return err; } static size_t calc_buf_size(off_t size, off_t offset) { return offset + sshfs.max_read < size ? sshfs.max_read : size - offset; } static int sshfs_truncate_shrink(const char *path, off_t size) { int res; char *data; off_t offset; struct fuse_file_info fi; data = calloc(size, 1); if (!data) return -ENOMEM; fi.flags = O_RDONLY; res = sshfs_open(path, &fi); if (res) goto out; for (offset = 0; offset < size; offset += res) { size_t bufsize = calc_buf_size(size, offset); res = sshfs_read(path, data + offset, bufsize, offset, &fi); if (res <= 0) break; } sshfs_release(path, &fi); if (res < 0) goto out; fi.flags = O_WRONLY | O_TRUNC; res = sshfs_open(path, &fi); if (res) goto out; for (offset = 0; offset < size; offset += res) { size_t bufsize = calc_buf_size(size, offset); res = sshfs_write(path, data + offset, bufsize, offset, &fi); if (res < 0) break; } if (res >= 0) res = sshfs_flush(path, &fi); sshfs_release(path, &fi); out: free(data); return res; } static int sshfs_truncate_extend(const char *path, off_t size, struct fuse_file_info *fi) { int res; char c = 0; struct fuse_file_info tmpfi; struct fuse_file_info *openfi = fi; if (!fi) { openfi = &tmpfi; openfi->flags = O_WRONLY; res = sshfs_open(path, openfi); if (res) return res; } res = sshfs_write(path, &c, 1, size - 1, openfi); if (res == 1) res = sshfs_flush(path, openfi); if (!fi) sshfs_release(path, openfi); return res; } /* * Work around broken sftp servers which don't handle * SSH_FILEXFER_ATTR_SIZE in SETSTAT request. * * If new size is zero, just open the file with O_TRUNC. * * If new size is smaller than current size, then copy file locally, * then open/trunc and send it back. * * If new size is greater than current size, then write a zero byte to * the new end of the file. */ static int sshfs_truncate_workaround(const char *path, off_t size, struct fuse_file_info *fi) { if (size == 0) return sshfs_truncate_zero(path); else { struct stat stbuf; int err; if (fi) err = sshfs_fgetattr(path, &stbuf, fi); else err = sshfs_getattr(path, &stbuf); if (err) return err; if (stbuf.st_size == size) return 0; else if (stbuf.st_size > size) return sshfs_truncate_shrink(path, size); else return sshfs_truncate_extend(path, size, fi); } } static int processing_init(void) { signal(SIGPIPE, SIG_IGN); pthread_mutex_init(&sshfs.lock, NULL); pthread_mutex_init(&sshfs.lock_write, NULL); pthread_cond_init(&sshfs.outstanding_cond, NULL); sshfs.reqtab = g_hash_table_new(NULL, NULL); if (!sshfs.reqtab) { fprintf(stderr, "failed to create hash table\n"); return -1; } return 0; } static struct fuse_cache_operations sshfs_oper = { .oper = { .init = sshfs_init, .getattr = sshfs_getattr, .readlink = sshfs_readlink, .mknod = sshfs_mknod, .mkdir = sshfs_mkdir, .symlink = sshfs_symlink, .unlink = sshfs_unlink, .rmdir = sshfs_rmdir, .rename = sshfs_rename, .link = sshfs_link, .chmod = sshfs_chmod, .chown = sshfs_chown, .truncate = sshfs_truncate, .utime = sshfs_utime, .open = sshfs_open, .flush = sshfs_flush, .fsync = sshfs_fsync, .release = sshfs_release, .read = sshfs_read, .write = sshfs_write, .statfs = sshfs_statfs, #if FUSE_VERSION >= 25 .create = sshfs_create, .ftruncate = sshfs_ftruncate, .fgetattr = sshfs_fgetattr, #endif }, .cache_getdir = sshfs_getdir, }; static void usage(const char *progname) { printf( "usage: %s [user@]host:[dir] mountpoint [options]\n" "\n" "general options:\n" " -o opt,[opt...] mount options\n" " -h --help print help\n" " -V --version print version\n" "\n" "SSHFS options:\n" " -p PORT equivalent to '-o port=PORT'\n" " -C equivalent to '-o compression=yes'\n" " -F ssh_configfile specifies alternative ssh configuration file\n" " -1 equivalent to '-o ssh_protocol=1'\n" " -o reconnect reconnect to server\n" " -o delay_connect delay connection to server\n" " -o sshfs_sync synchronous writes\n" " -o no_readahead synchronous reads (no speculative readahead)\n" " -o sync_readdir synchronous readdir\n" " -o sshfs_debug print some debugging information\n" " -o cache=BOOL enable caching {yes,no} (default: yes)\n" " -o cache_timeout=N sets timeout for caches in seconds (default: 20)\n" " -o cache_X_timeout=N sets timeout for {stat,dir,link} cache\n" " -o workaround=LIST colon separated list of workarounds\n" " none no workarounds enabled\n" " all all workarounds enabled\n" " [no]rename fix renaming to existing file (default: off)\n" #ifdef SSH_NODELAY_WORKAROUND " [no]nodelay set nodelay tcp flag in ssh (default: on)\n" #endif " [no]nodelaysrv set nodelay tcp flag in sshd (default: off)\n" " [no]truncate fix truncate for old servers (default: off)\n" " [no]buflimit fix buffer fillup bug in server (default: on)\n" " -o idmap=TYPE user/group ID mapping, possible types are:\n" " none no translation of the ID space (default)\n" " user only translate UID of connecting user\n" " file translate UIDs/GIDs contained in uidfile/gidfile\n" " -o uidfile=FILE file containing username:remote_uid mappings\n" " -o gidfile=FILE file containing groupname:remote_gid mappings\n" " -o nomap=TYPE with idmap=file, how to handle missing mappings\n" " ignore don't do any re-mapping\n" " error return an error (default)\n" " -o ssh_command=CMD execute CMD instead of 'ssh'\n" " -o ssh_protocol=N ssh protocol to use (default: 2)\n" " -o sftp_server=SERV path to sftp server or subsystem (default: sftp)\n" " -o directport=PORT directly connect to PORT bypassing ssh\n" " -o slave communicate over stdin and stdout bypassing network\n" " -o disable_hardlink link(2) will return with errno set to ENOSYS\n" " -o transform_symlinks transform absolute symlinks to relative\n" " -o follow_symlinks follow symlinks on the server\n" " -o no_check_root don't check for existence of 'dir' on server\n" " -o password_stdin read password from stdin (only for pam_mount!)\n" " -o SSHOPT=VAL ssh options (see man ssh_config)\n" "\n", progname); } static int is_ssh_opt(const char *arg) { if (arg[0] != '-') { unsigned arglen = strlen(arg); const char **o; for (o = ssh_opts; *o; o++) { unsigned olen = strlen(*o); if (arglen > olen && arg[olen] == '=' && strncasecmp(arg, *o, olen) == 0) return 1; } } return 0; } static int sshfs_fuse_main(struct fuse_args *args) { #if FUSE_VERSION >= 26 return fuse_main(args->argc, args->argv, cache_init(&sshfs_oper), NULL); #else return fuse_main(args->argc, args->argv, cache_init(&sshfs_oper)); #endif } static int sshfs_opt_proc(void *data, const char *arg, int key, struct fuse_args *outargs) { char *tmp; (void) data; switch (key) { case FUSE_OPT_KEY_OPT: if (is_ssh_opt(arg)) { tmp = g_strdup_printf("-o%s", arg); ssh_add_arg(tmp); g_free(tmp); return 0; } return 1; case FUSE_OPT_KEY_NONOPT: if (!sshfs.host && strchr(arg, ':')) { sshfs.host = strdup(arg); return 0; } return 1; case KEY_PORT: tmp = g_strdup_printf("-oPort=%s", arg + 2); ssh_add_arg(tmp); g_free(tmp); return 0; case KEY_COMPRESS: ssh_add_arg("-oCompression=yes"); return 0; case KEY_CONFIGFILE: tmp = g_strdup_printf("-F%s", arg + 2); ssh_add_arg(tmp); g_free(tmp); return 0; case KEY_HELP: usage(outargs->argv[0]); fuse_opt_add_arg(outargs, "-ho"); sshfs_fuse_main(outargs); exit(1); case KEY_VERSION: printf("SSHFS version %s\n", PACKAGE_VERSION); #if FUSE_VERSION >= 25 fuse_opt_add_arg(outargs, "--version"); sshfs_fuse_main(outargs); #endif exit(0); case KEY_FOREGROUND: sshfs.foreground = 1; return 1; default: fprintf(stderr, "internal error\n"); abort(); } } static int workaround_opt_proc(void *data, const char *arg, int key, struct fuse_args *outargs) { (void) data; (void) key; (void) outargs; fprintf(stderr, "unknown workaround: '%s'\n", arg); return -1; } int parse_workarounds(void) { int res; char *argv[] = { "", "-o", sshfs.workarounds, NULL }; struct fuse_args args = FUSE_ARGS_INIT(3, argv); char *s = sshfs.workarounds; if (!s) return 0; while ((s = strchr(s, ':'))) *s = ','; res = fuse_opt_parse(&args, &sshfs, workaround_opts, workaround_opt_proc); fuse_opt_free_args(&args); return res; } #if FUSE_VERSION == 25 static int fuse_opt_insert_arg(struct fuse_args *args, int pos, const char *arg) { assert(pos <= args->argc); if (fuse_opt_add_arg(args, arg) == -1) return -1; if (pos != args->argc - 1) { char *newarg = args->argv[args->argc - 1]; memmove(&args->argv[pos + 1], &args->argv[pos], sizeof(char *) * (args->argc - pos - 1)); args->argv[pos] = newarg; } return 0; } #endif static void check_large_read(struct fuse_args *args) { struct utsname buf; int err = uname(&buf); if (!err && strcmp(buf.sysname, "Linux") == 0 && strncmp(buf.release, "2.4.", 4) == 0) fuse_opt_insert_arg(args, 1, "-olarge_read"); } static int read_password(void) { int size = getpagesize(); int max_password = 64; int n; sshfs.password = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_LOCKED, -1, 0); if (sshfs.password == MAP_FAILED) { perror("Failed to allocate locked page for password"); return -1; } /* Don't use fgets() because password might stay in memory */ for (n = 0; n < max_password; n++) { int res; res = read(0, &sshfs.password[n], 1); if (res == -1) { perror("Reading password"); return -1; } if (res == 0) { sshfs.password[n] = '\n'; break; } if (sshfs.password[n] == '\n') break; } if (n == max_password) { fprintf(stderr, "Password too long\n"); return -1; } sshfs.password[n+1] = '\0'; ssh_add_arg("-oNumberOfPasswordPrompts=1"); return 0; } static void set_ssh_command(void) { char *s; char *d; int i = 0; int end = 0; d = sshfs.ssh_command; s = sshfs.ssh_command; while (!end) { switch (*s) { case '\0': end = 1; case ' ': *d = '\0'; if (i == 0) { replace_arg(&sshfs.ssh_args.argv[0], sshfs.ssh_command); } else { if (fuse_opt_insert_arg(&sshfs.ssh_args, i, sshfs.ssh_command) == -1) _exit(1); } i++; d = sshfs.ssh_command; break; case '\\': if (s[1]) s++; default: *d++ = *s; } s++; } } static char *find_base_path(void) { char *s = sshfs.host; char *d = s; for (; *s && *s != ':'; s++) { if (*s == '[') { /* * Handle IPv6 numerical address enclosed in square * brackets */ s++; for (; *s != ']'; s++) { if (!*s) { fprintf(stderr, "missing ']' in hostname\n"); exit(1); } *d++ = *s; } } else { *d++ = *s; } } *d++ = '\0'; s++; return s; } /* * Remove commas from fsname, as it confuses the fuse option parser. */ static void fsname_remove_commas(char *fsname) { if (strchr(fsname, ',') != NULL) { char *s = fsname; char *d = s; for (; *s; s++) { if (*s != ',') *d++ = *s; } *d = *s; } } #if FUSE_VERSION >= 27 static char *fsname_escape_commas(char *fsnameold) { char *fsname = g_malloc(strlen(fsnameold) * 2 + 1); char *d = fsname; char *s; for (s = fsnameold; *s; s++) { if (*s == '\\' || *s == ',') *d++ = '\\'; *d++ = *s; } *d = '\0'; g_free(fsnameold); return fsname; } #endif static int ssh_connect(void) { int res; res = processing_init(); if (res == -1) return -1; if (!sshfs.delay_connect) { if (connect_remote() == -1) return -1; if (!sshfs.no_check_root && sftp_check_root(sshfs.base_path) != 0) return -1; } return 0; } /* number of ':' separated fields in a passwd/group file that we care * about */ #define IDMAP_FIELDS 3 /* given a line from a uidmap or gidmap, parse out the name and id */ static void parse_idmap_line(char *line, const char* filename, const unsigned int lineno, uint32_t *ret_id, char **ret_name, const int eof) { /* chomp off the trailing newline */ char *p = line; if ((p = strrchr(line, '\n'))) *p = '\0'; else if (!eof) { fprintf(stderr, "%s:%u: line too long\n", filename, lineno); exit(1); } char *tokens[IDMAP_FIELDS]; char *tok; int i; for (i = 0; (tok = strsep(&line, ":")) && (i < IDMAP_FIELDS) ; i++) { tokens[i] = tok; } char *name_tok, *id_tok; if (i == 2) { /* assume name:id format */ name_tok = tokens[0]; id_tok = tokens[1]; } else if (i >= IDMAP_FIELDS) { /* assume passwd/group file format */ name_tok = tokens[0]; id_tok = tokens[2]; } else { fprintf(stderr, "%s:%u: unknown format\n", filename, lineno); exit(1); } errno = 0; uint32_t remote_id = strtoul(id_tok, NULL, 10); if (errno) { fprintf(stderr, "Invalid id number on line %u of '%s': %s\n", lineno, filename, strerror(errno)); exit(1); } *ret_name = strdup(name_tok); *ret_id = remote_id; } /* read a uidmap or gidmap */ static void read_id_map(char *file, uint32_t *(*map_fn)(char *), const char *name_id, GHashTable **idmap, GHashTable **r_idmap) { *idmap = g_hash_table_new(NULL, NULL); *r_idmap = g_hash_table_new(NULL, NULL); FILE *fp; char line[LINE_MAX]; unsigned int lineno = 0; uid_t local_uid = getuid(); fp = fopen(file, "r"); if (fp == NULL) { fprintf(stderr, "failed to open '%s': %s\n", file, strerror(errno)); exit(1); } struct stat st; if (fstat(fileno(fp), &st) == -1) { fprintf(stderr, "failed to stat '%s': %s\n", file, strerror(errno)); exit(1); } if (st.st_uid != local_uid) { fprintf(stderr, "'%s' is not owned by uid %lu\n", file, (unsigned long)local_uid); exit(1); } if (st.st_mode & S_IWGRP || st.st_mode & S_IWOTH) { fprintf(stderr, "'%s' is writable by other users\n", file); exit(1); } while (fgets(line, LINE_MAX, fp) != NULL) { lineno++; uint32_t remote_id; char *name; /* skip blank lines */ if (line[0] == '\n' || line[0] == '\0') continue; parse_idmap_line(line, file, lineno, &remote_id, &name, feof(fp)); uint32_t *local_id = map_fn(name); if (local_id == NULL) { /* not found */ DEBUG("%s(%u): no local %s\n", name, remote_id, name_id); free(name); continue; } DEBUG("%s: remote %s %u => local %s %u\n", name, name_id, remote_id, name_id, *local_id); g_hash_table_insert(*idmap, GUINT_TO_POINTER(remote_id), GUINT_TO_POINTER(*local_id)); g_hash_table_insert(*r_idmap, GUINT_TO_POINTER(*local_id), GUINT_TO_POINTER(remote_id)); free(name); free(local_id); } if (fclose(fp) == EOF) { fprintf(stderr, "failed to close '%s': %s", file, strerror(errno)); exit(1); } } /* given a username, return a pointer to its uid, or NULL if it doesn't * exist on this system */ static uint32_t *username_to_uid(char *name) { errno = 0; struct passwd *pw = getpwnam(name); if (pw == NULL) { if (errno == 0) { /* "does not exist" */ return NULL; } fprintf(stderr, "Failed to look up user '%s': %s\n", name, strerror(errno)); exit(1); } uint32_t *r = malloc(sizeof(uint32_t)); if (r == NULL) { fprintf(stderr, "sshfs: memory allocation failed\n"); abort(); } *r = pw->pw_uid; return r; } /* given a groupname, return a pointer to its gid, or NULL if it doesn't * exist on this system */ static uint32_t *groupname_to_gid(char *name) { errno = 0; struct group *gr = getgrnam(name); if (gr == NULL) { if (errno == 0) { /* "does not exist" */ return NULL; } fprintf(stderr, "Failed to look up group '%s': %s\n", name, strerror(errno)); exit(1); } uint32_t *r = malloc(sizeof(uint32_t)); if (r == NULL) { fprintf(stderr, "sshfs: memory allocation failed\n"); abort(); } *r = gr->gr_gid; return r; } static inline void load_uid_map(void) { read_id_map(sshfs.uid_file, &username_to_uid, "uid", &sshfs.uid_map, &sshfs.r_uid_map); } static inline void load_gid_map(void) { read_id_map(sshfs.gid_file, &groupname_to_gid, "gid", &sshfs.gid_map, &sshfs.r_gid_map); } int main(int argc, char *argv[]) { int res; struct fuse_args args = FUSE_ARGS_INIT(argc, argv); char *tmp; char *fsname; const char *sftp_server; int libver; g_thread_init(NULL); sshfs.blksize = 4096; /* SFTP spec says all servers should allow at least 32k I/O */ sshfs.max_read = 32768; sshfs.max_write = 32768; sshfs.nodelay_workaround = 1; sshfs.nodelaysrv_workaround = 0; sshfs.rename_workaround = 0; sshfs.truncate_workaround = 0; sshfs.buflimit_workaround = 1; sshfs.ssh_ver = 2; sshfs.progname = argv[0]; sshfs.rfd = -1; sshfs.wfd = -1; sshfs.ptyfd = -1; sshfs.ptyslavefd = -1; sshfs.delay_connect = 0; sshfs.slave = 0; sshfs.detect_uid = 0; sshfs.idmap = IDMAP_NONE; sshfs.nomap = NOMAP_ERROR; ssh_add_arg("ssh"); ssh_add_arg("-x"); ssh_add_arg("-a"); ssh_add_arg("-oClearAllForwardings=yes"); if (fuse_opt_parse(&args, &sshfs, sshfs_opts, sshfs_opt_proc) == -1 || parse_workarounds() == -1) exit(1); if (sshfs.idmap == IDMAP_USER) sshfs.detect_uid = 1; else if (sshfs.idmap == IDMAP_FILE) { sshfs.uid_map = NULL; sshfs.gid_map = NULL; sshfs.r_uid_map = NULL; sshfs.r_gid_map = NULL; if (!sshfs.uid_file && !sshfs.gid_file) { fprintf(stderr, "need a uidfile or gidfile with idmap=file\n"); exit(1); } if (sshfs.uid_file) load_uid_map(); if (sshfs.gid_file) load_gid_map(); } free(sshfs.uid_file); free(sshfs.gid_file); DEBUG("SSHFS version %s\n", PACKAGE_VERSION); if (sshfs.slave) { /* Force sshfs to the foreground when using stdin+stdout */ sshfs.foreground = 1; } if (sshfs.slave && sshfs.password_stdin) { fprintf(stderr, "the password_stdin and slave options cannot both be specified\n"); exit(1); } if (sshfs.password_stdin) { res = read_password(); if (res == -1) exit(1); } if (sshfs.buflimit_workaround) /* Work around buggy sftp-server in OpenSSH. Without this on a slow server a 10Mbyte buffer would fill up and the server would abort */ sshfs.max_outstanding_len = 8388608; else sshfs.max_outstanding_len = ~0; if (!sshfs.host) { fprintf(stderr, "missing host\n"); fprintf(stderr, "see `%s -h' for usage\n", argv[0]); exit(1); } fsname = g_strdup(sshfs.host); sshfs.base_path = g_strdup(find_base_path()); if (sshfs.ssh_command) set_ssh_command(); tmp = g_strdup_printf("-%i", sshfs.ssh_ver); ssh_add_arg(tmp); g_free(tmp); ssh_add_arg(sshfs.host); if (sshfs.sftp_server) sftp_server = sshfs.sftp_server; else if (sshfs.ssh_ver == 1) sftp_server = SFTP_SERVER_PATH; else sftp_server = "sftp"; if (sshfs.ssh_ver != 1 && strchr(sftp_server, '/') == NULL) ssh_add_arg("-s"); ssh_add_arg(sftp_server); free(sshfs.sftp_server); res = cache_parse_options(&args); if (res == -1) exit(1); sshfs.randseed = time(0); if (sshfs.max_read > 65536) sshfs.max_read = 65536; if (sshfs.max_write > 65536) sshfs.max_write = 65536; if (fuse_is_lib_option("ac_attr_timeout=")) fuse_opt_insert_arg(&args, 1, "-oauto_cache,ac_attr_timeout=0"); #if FUSE_VERSION >= 27 libver = fuse_version(); assert(libver >= 27); if (libver >= 28) fsname = fsname_escape_commas(fsname); else fsname_remove_commas(fsname); tmp = g_strdup_printf("-osubtype=sshfs,fsname=%s", fsname); #else fsname_remove_commas(fsname); tmp = g_strdup_printf("-ofsname=sshfs#%s", fsname); #endif fuse_opt_insert_arg(&args, 1, tmp); g_free(tmp); g_free(fsname); check_large_read(&args); #if FUSE_VERSION >= 26 { struct fuse *fuse; struct fuse_chan *ch; char *mountpoint; int multithreaded; int foreground; struct stat st; res = fuse_parse_cmdline(&args, &mountpoint, &multithreaded, &foreground); if (res == -1) exit(1); if (sshfs.slave) { /* Force sshfs to the foreground when using stdin+stdout */ foreground = 1; } res = stat(mountpoint, &st); if (res == -1) { perror(mountpoint); exit(1); } sshfs.mnt_mode = st.st_mode; ch = fuse_mount(mountpoint, &args); if (!ch) exit(1); res = fcntl(fuse_chan_fd(ch), F_SETFD, FD_CLOEXEC); if (res == -1) perror("WARNING: failed to set FD_CLOEXEC on fuse device"); fuse = fuse_new(ch, &args, cache_init(&sshfs_oper), sizeof(struct fuse_operations), NULL); if (fuse == NULL) { fuse_unmount(mountpoint, ch); exit(1); } /* * FIXME: trim $PATH so it doesn't contain anything inside the * mountpoint, which would deadlock. */ res = ssh_connect(); if (res == -1) { fuse_unmount(mountpoint, ch); fuse_destroy(fuse); exit(1); } res = fuse_daemonize(foreground); if (res != -1) res = fuse_set_signal_handlers(fuse_get_session(fuse)); if (res == -1) { fuse_unmount(mountpoint, ch); fuse_destroy(fuse); exit(1); } if (multithreaded) res = fuse_loop_mt(fuse); else res = fuse_loop(fuse); if (res == -1) res = 1; else res = 0; fuse_remove_signal_handlers(fuse_get_session(fuse)); fuse_unmount(mountpoint, ch); fuse_destroy(fuse); free(mountpoint); } #else res = ssh_connect(); if (res == -1) exit(1); res = sshfs_fuse_main(&args); #endif if (sshfs.debug) { unsigned int avg_rtt = 0; if (sshfs.num_sent) avg_rtt = sshfs.total_rtt / sshfs.num_sent; DEBUG("\n" "sent: %llu messages, %llu bytes\n" "received: %llu messages, %llu bytes\n" "rtt min/max/avg: %ums/%ums/%ums\n" "num connect: %u\n", (unsigned long long) sshfs.num_sent, (unsigned long long) sshfs.bytes_sent, (unsigned long long) sshfs.num_received, (unsigned long long) sshfs.bytes_received, sshfs.min_rtt, sshfs.max_rtt, avg_rtt, sshfs.num_connect); } fuse_opt_free_args(&args); fuse_opt_free_args(&sshfs.ssh_args); free(sshfs.directport); return res; } sshfs-fuse-2.5/compat/0000755000175000001440000000000012265244116011731 500000000000000sshfs-fuse-2.5/compat/fuse_opt.c0000644000175000001440000002173212104163355013643 00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU LGPL. See the file COPYING.LIB */ #include "fuse_opt.h" #include #include #include #include struct fuse_opt_context { void *data; const struct fuse_opt *opt; fuse_opt_proc_t proc; int argctr; int argc; char **argv; struct fuse_args outargs; char *opts; int nonopt; }; void fuse_opt_free_args(struct fuse_args *args) { if (args && args->argv && args->allocated) { int i; for (i = 0; i < args->argc; i++) free(args->argv[i]); free(args->argv); args->argv = NULL; args->allocated = 0; } } static int alloc_failed(void) { fprintf(stderr, "fuse: memory allocation failed\n"); return -1; } int fuse_opt_add_arg(struct fuse_args *args, const char *arg) { char **newargv; char *newarg; assert(!args->argv || args->allocated); newargv = realloc(args->argv, (args->argc + 2) * sizeof(char *)); newarg = newargv ? strdup(arg) : NULL; if (!newargv || !newarg) return alloc_failed(); args->argv = newargv; args->allocated = 1; args->argv[args->argc++] = newarg; args->argv[args->argc] = NULL; return 0; } int fuse_opt_insert_arg(struct fuse_args *args, int pos, const char *arg) { assert(pos <= args->argc); if (fuse_opt_add_arg(args, arg) == -1) return -1; if (pos != args->argc - 1) { char *newarg = args->argv[args->argc - 1]; memmove(&args->argv[pos + 1], &args->argv[pos], sizeof(char *) * (args->argc - pos - 1)); args->argv[pos] = newarg; } return 0; } static int next_arg(struct fuse_opt_context *ctx, const char *opt) { if (ctx->argctr + 1 >= ctx->argc) { fprintf(stderr, "fuse: missing argument after `%s'\n", opt); return -1; } ctx->argctr++; return 0; } static int add_arg(struct fuse_opt_context *ctx, const char *arg) { return fuse_opt_add_arg(&ctx->outargs, arg); } int fuse_opt_add_opt(char **opts, const char *opt) { char *newopts; if (!*opts) newopts = strdup(opt); else { unsigned oldlen = strlen(*opts); newopts = realloc(*opts, oldlen + 1 + strlen(opt) + 1); if (newopts) { newopts[oldlen] = ','; strcpy(newopts + oldlen + 1, opt); } } if (!newopts) return alloc_failed(); *opts = newopts; return 0; } static int add_opt(struct fuse_opt_context *ctx, const char *opt) { return fuse_opt_add_opt(&ctx->opts, opt); } static int call_proc(struct fuse_opt_context *ctx, const char *arg, int key, int iso) { if (key == FUSE_OPT_KEY_DISCARD) return 0; if (key != FUSE_OPT_KEY_KEEP && ctx->proc) { int res = ctx->proc(ctx->data, arg, key, &ctx->outargs); if (res == -1 || !res) return res; } if (iso) return add_opt(ctx, arg); else return add_arg(ctx, arg); } static int match_template(const char *t, const char *arg, unsigned *sepp) { int arglen = strlen(arg); const char *sep = strchr(t, '='); sep = sep ? sep : strchr(t, ' '); if (sep && (!sep[1] || sep[1] == '%')) { int tlen = sep - t; if (sep[0] == '=') tlen ++; if (arglen >= tlen && strncmp(arg, t, tlen) == 0) { *sepp = sep - t; return 1; } } if (strcmp(t, arg) == 0) { *sepp = 0; return 1; } return 0; } static const struct fuse_opt *find_opt(const struct fuse_opt *opt, const char *arg, unsigned *sepp) { for (; opt && opt->templ; opt++) if (match_template(opt->templ, arg, sepp)) return opt; return NULL; } int fuse_opt_match(const struct fuse_opt *opts, const char *opt) { unsigned dummy; return find_opt(opts, opt, &dummy) ? 1 : 0; } static int process_opt_param(void *var, const char *format, const char *param, const char *arg) { assert(format[0] == '%'); if (format[1] == 's') { char *copy = strdup(param); if (!copy) return alloc_failed(); *(char **) var = copy; } else { if (sscanf(param, format, var) != 1) { fprintf(stderr, "fuse: invalid parameter in option `%s'\n", arg); return -1; } } return 0; } static int process_opt(struct fuse_opt_context *ctx, const struct fuse_opt *opt, unsigned sep, const char *arg, int iso) { if (opt->offset == -1U) { if (call_proc(ctx, arg, opt->value, iso) == -1) return -1; } else { void *var = ctx->data + opt->offset; if (sep && opt->templ[sep + 1]) { const char *param = arg + sep; if (opt->templ[sep] == '=') param ++; if (process_opt_param(var, opt->templ + sep + 1, param, arg) == -1) return -1; } else *(int *)var = opt->value; } return 0; } static int process_opt_sep_arg(struct fuse_opt_context *ctx, const struct fuse_opt *opt, unsigned sep, const char *arg, int iso) { int res; char *newarg; char *param; if (next_arg(ctx, arg) == -1) return -1; param = ctx->argv[ctx->argctr]; newarg = malloc(sep + strlen(param) + 1); if (!newarg) return alloc_failed(); memcpy(newarg, arg, sep); strcpy(newarg + sep, param); res = process_opt(ctx, opt, sep, newarg, iso); free(newarg); return res; } static int process_gopt(struct fuse_opt_context *ctx, const char *arg, int iso) { unsigned sep; const struct fuse_opt *opt = find_opt(ctx->opt, arg, &sep); if (opt) { for (; opt; opt = find_opt(opt + 1, arg, &sep)) { int res; if (sep && opt->templ[sep] == ' ' && !arg[sep]) res = process_opt_sep_arg(ctx, opt, sep, arg, iso); else res = process_opt(ctx, opt, sep, arg, iso); if (res == -1) return -1; } return 0; } else return call_proc(ctx, arg, FUSE_OPT_KEY_OPT, iso); } static int process_real_option_group(struct fuse_opt_context *ctx, char *opts) { char *sep; do { int res; sep = strchr(opts, ','); if (sep) *sep = '\0'; res = process_gopt(ctx, opts, 1); if (res == -1) return -1; opts = sep + 1; } while (sep); return 0; } static int process_option_group(struct fuse_opt_context *ctx, const char *opts) { int res; char *copy; const char *sep = strchr(opts, ','); if (!sep) return process_gopt(ctx, opts, 1); copy = strdup(opts); if (!copy) { fprintf(stderr, "fuse: memory allocation failed\n"); return -1; } res = process_real_option_group(ctx, copy); free(copy); return res; } static int process_one(struct fuse_opt_context *ctx, const char *arg) { if (ctx->nonopt || arg[0] != '-') return call_proc(ctx, arg, FUSE_OPT_KEY_NONOPT, 0); else if (arg[1] == 'o') { if (arg[2]) return process_option_group(ctx, arg + 2); else { if (next_arg(ctx, arg) == -1) return -1; return process_option_group(ctx, ctx->argv[ctx->argctr]); } } else if (arg[1] == '-' && !arg[2]) { if (add_arg(ctx, arg) == -1) return -1; ctx->nonopt = ctx->outargs.argc; return 0; } else return process_gopt(ctx, arg, 0); } static int opt_parse(struct fuse_opt_context *ctx) { if (ctx->argc) { if (add_arg(ctx, ctx->argv[0]) == -1) return -1; } for (ctx->argctr = 1; ctx->argctr < ctx->argc; ctx->argctr++) if (process_one(ctx, ctx->argv[ctx->argctr]) == -1) return -1; if (ctx->opts) { if (fuse_opt_insert_arg(&ctx->outargs, 1, "-o") == -1 || fuse_opt_insert_arg(&ctx->outargs, 2, ctx->opts) == -1) return -1; } if (ctx->nonopt && ctx->nonopt == ctx->outargs.argc) { free(ctx->outargs.argv[ctx->outargs.argc - 1]); ctx->outargs.argv[--ctx->outargs.argc] = NULL; } return 0; } int fuse_opt_parse(struct fuse_args *args, void *data, const struct fuse_opt opts[], fuse_opt_proc_t proc) { int res; struct fuse_opt_context ctx = { .data = data, .opt = opts, .proc = proc, }; if (!args || !args->argv || !args->argc) return 0; ctx.argc = args->argc; ctx.argv = args->argv; res = opt_parse(&ctx); if (res != -1) { struct fuse_args tmp = *args; *args = ctx.outargs; ctx.outargs = tmp; } free(ctx.opts); fuse_opt_free_args(&ctx.outargs); return res; } sshfs-fuse-2.5/compat/fuse_opt.h0000644000175000001440000001616612104163355013655 00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ #ifndef _FUSE_OPT_H_ #define _FUSE_OPT_H_ /* This file defines the option parsing interface of FUSE */ #ifdef __cplusplus extern "C" { #endif /** * Option description * * This structure describes a single option, and and action associated * with it, in case it matches. * * More than one such match may occur, in which case the action for * each match is executed. * * There are three possible actions in case of a match: * * i) An integer (int or unsigned) variable determined by 'offset' is * set to 'value' * * ii) The processing function is called, with 'value' as the key * * iii) An integer (any) or string (char *) variable determined by * 'offset' is set to the value of an option parameter * * 'offset' should normally be either set to * * - 'offsetof(struct foo, member)' actions i) and iii) * * - -1 action ii) * * The 'offsetof()' macro is defined in the header. * * The template determines which options match, and also have an * effect on the action. Normally the action is either i) or ii), but * if a format is present in the template, then action iii) is * performed. * * The types of templates are: * * 1) "-x", "-foo", "--foo", "--foo-bar", etc. These match only * themselves. Invalid values are "--" and anything beginning * with "-o" * * 2) "foo", "foo-bar", etc. These match "-ofoo", "-ofoo-bar" or * the relevant option in a comma separated option list * * 3) "bar=", "--foo=", etc. These are variations of 1) and 2) * which have a parameter * * 4) "bar=%s", "--foo=%lu", etc. Same matching as above but perform * action iii). * * 5) "-x ", etc. Matches either "-xparam" or "-x param" as * two separate arguments * * 6) "-x %s", etc. Combination of 4) and 5) * * If the format is "%s", memory is allocated for the string unlike * with scanf(). */ struct fuse_opt { /** Matching template and optional parameter formatting */ const char *templ; /** * Offset of variable within 'data' parameter of fuse_opt_parse() * or -1 */ unsigned long offset; /** * Value to set the variable to, or to be passed as 'key' to the * processing function. Ignored if template has a format */ int value; }; /** * Key option. In case of a match, the processing function will be * called with the specified key. */ #define FUSE_OPT_KEY(templ, key) { templ, -1U, key } /** * Last option. An array of 'struct fuse_opt' must end with a NULL * template value */ #define FUSE_OPT_END { .templ = NULL } /** * Argument list */ struct fuse_args { /** Argument count */ int argc; /** Argument vector. NULL terminated */ char **argv; /** Is 'argv' allocated? */ int allocated; }; /** * Initializer for 'struct fuse_args' */ #define FUSE_ARGS_INIT(argc, argv) { argc, argv, 0 } /** * Key value passed to the processing function if an option did not * match any template */ #define FUSE_OPT_KEY_OPT -1 /** * Key value passed to the processing function for all non-options * * Non-options are the arguments beginning with a charater other than * '-' or all arguments after the special '--' option */ #define FUSE_OPT_KEY_NONOPT -2 /** * Special key value for options to keep * * Argument is not passed to processing function, but behave as if the * processing function returned 1 */ #define FUSE_OPT_KEY_KEEP -3 /** * Special key value for options to discard * * Argument is not passed to processing function, but behave as if the * processing function returned zero */ #define FUSE_OPT_KEY_DISCARD -4 /** * Processing function * * This function is called if * - option did not match any 'struct fuse_opt' * - argument is a non-option * - option did match and offset was set to -1 * * The 'arg' parameter will always contain the whole argument or * option including the parameter if exists. A two-argument option * ("-x foo") is always converted to single arguemnt option of the * form "-xfoo" before this function is called. * * Options of the form '-ofoo' are passed to this function without the * '-o' prefix. * * The return value of this function determines whether this argument * is to be inserted into the output argument vector, or discarded. * * @param data is the user data passed to the fuse_opt_parse() function * @param arg is the whole argument or option * @param key determines why the processing function was called * @param outargs the current output argument list * @return -1 on error, 0 if arg is to be discarded, 1 if arg should be kept */ typedef int (*fuse_opt_proc_t)(void *data, const char *arg, int key, struct fuse_args *outargs); /** * Option parsing function * * If 'args' was returned from a previous call to fuse_opt_parse() or * it was constructed from * * A NULL 'args' is equivalent to an empty argument vector * * A NULL 'opts' is equivalent to an 'opts' array containing a single * end marker * * A NULL 'proc' is equivalent to a processing function always * returning '1' * * @param args is the input and output argument list * @param data is the user data * @param opts is the option description array * @param proc is the processing function * @return -1 on error, 0 on success */ int fuse_opt_parse(struct fuse_args *args, void *data, const struct fuse_opt opts[], fuse_opt_proc_t proc); /** * Add an option to a comma separated option list * * @param opts is a pointer to an option list, may point to a NULL value * @param opt is the option to add * @return -1 on allocation error, 0 on success */ int fuse_opt_add_opt(char **opts, const char *opt); /** * Add an argument to a NULL terminated argument vector * * @param args is the structure containing the current argument list * @param arg is the new argument to add * @return -1 on allocation error, 0 on success */ int fuse_opt_add_arg(struct fuse_args *args, const char *arg); /** * Add an argument at the specified position in a NULL terminated * argument vector * * Adds the argument to the N-th position. This is useful for adding * options at the beggining of the array which must not come after the * special '--' option. * * @param args is the structure containing the current argument list * @param pos is the position at which to add the argument * @param arg is the new argument to add * @return -1 on allocation error, 0 on success */ int fuse_opt_insert_arg(struct fuse_args *args, int pos, const char *arg); /** * Free the contents of argument list * * The structure itself is not freed * * @param args is the structure containing the argument list */ void fuse_opt_free_args(struct fuse_args *args); /** * Check if an option matches * * @param opts is the option description array * @param opt is the option to match * @return 1 if a match is found, 0 if not */ int fuse_opt_match(const struct fuse_opt opts[], const char *opt); #ifdef __cplusplus } #endif #endif /* _FUSE_OPT_H_ */ sshfs-fuse-2.5/Makefile.am0000644000175000001440000000143012263233767012430 00000000000000## Process this file with automake to produce Makefile.in bin_PROGRAMS = sshfs sshfs_SOURCES = sshfs.c cache.c cache.h if FUSE_OPT_COMPAT sshfs_SOURCES += compat/fuse_opt.c compat/fuse_opt.h endif sshfs_LDADD = $(SSHFS_LIBS) sshfs_CFLAGS = $(SSHFS_CFLAGS) sshfs_CPPFLAGS = -D_REENTRANT -DFUSE_USE_VERSION=26 -DLIBDIR=\"$(libdir)\" EXTRA_DIST = sshnodelay.c FAQ.txt CLEANFILES = sshnodelay.so dist_man_MANS = sshfs.1 if SSH_NODELAY_SO all-local: sshnodelay.so install-exec-local: sshnodelay.so test -z "$(libdir)" || $(mkdir_p) "$(DESTDIR)$(libdir)" $(INSTALL) -m 755 sshnodelay.so "$(DESTDIR)$(libdir)/sshnodelay.so" uninstall-local: rm -f "$(DESTDIR)$(libdir)/sshnodelay.so" sshnodelay.so: $(CC) -Wall -W -s --shared -fPIC $(sshnodelay_libs) sshnodelay.c -o sshnodelay.so endif sshfs-fuse-2.5/cache.c0000644000175000001440000003476112104163355011605 00000000000000/* Caching file system proxy Copyright (C) 2004 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ #include "cache.h" #include #include #include #include #include #include #define DEFAULT_CACHE_TIMEOUT 20 #define MAX_CACHE_SIZE 10000 #define MIN_CACHE_CLEAN_INTERVAL 5 #define CACHE_CLEAN_INTERVAL 60 struct cache { int on; unsigned stat_timeout; unsigned dir_timeout; unsigned link_timeout; struct fuse_cache_operations *next_oper; GHashTable *table; pthread_mutex_t lock; time_t last_cleaned; uint64_t write_ctr; }; static struct cache cache; struct node { struct stat stat; time_t stat_valid; char **dir; time_t dir_valid; char *link; time_t link_valid; time_t valid; }; struct fuse_cache_dirhandle { const char *path; fuse_dirh_t h; fuse_dirfil_t filler; GPtrArray *dir; uint64_t wrctr; }; static void free_node(gpointer node_) { struct node *node = (struct node *) node_; g_strfreev(node->dir); g_free(node); } static int cache_clean_entry(void *key_, struct node *node, time_t *now) { (void) key_; if (*now > node->valid) return TRUE; else return FALSE; } static void cache_clean(void) { time_t now = time(NULL); if (now > cache.last_cleaned + MIN_CACHE_CLEAN_INTERVAL && (g_hash_table_size(cache.table) > MAX_CACHE_SIZE || now > cache.last_cleaned + CACHE_CLEAN_INTERVAL)) { g_hash_table_foreach_remove(cache.table, (GHRFunc) cache_clean_entry, &now); cache.last_cleaned = now; } } static struct node *cache_lookup(const char *path) { return (struct node *) g_hash_table_lookup(cache.table, path); } static void cache_purge(const char *path) { g_hash_table_remove(cache.table, path); } static void cache_purge_parent(const char *path) { const char *s = strrchr(path, '/'); if (s) { if (s == path) g_hash_table_remove(cache.table, "/"); else { char *parent = g_strndup(path, s - path); cache_purge(parent); g_free(parent); } } } void cache_invalidate(const char *path) { if (!cache.on) return; pthread_mutex_lock(&cache.lock); cache_purge(path); pthread_mutex_unlock(&cache.lock); } void cache_invalidate_write(const char *path) { pthread_mutex_lock(&cache.lock); cache_purge(path); cache.write_ctr++; pthread_mutex_unlock(&cache.lock); } static void cache_invalidate_dir(const char *path) { pthread_mutex_lock(&cache.lock); cache_purge(path); cache_purge_parent(path); pthread_mutex_unlock(&cache.lock); } static int cache_del_children(const char *key, void *val_, const char *path) { (void) val_; if (strncmp(key, path, strlen(path)) == 0) return TRUE; else return FALSE; } static void cache_do_rename(const char *from, const char *to) { pthread_mutex_lock(&cache.lock); g_hash_table_foreach_remove(cache.table, (GHRFunc) cache_del_children, (char *) from); cache_purge(from); cache_purge(to); cache_purge_parent(from); cache_purge_parent(to); pthread_mutex_unlock(&cache.lock); } static struct node *cache_get(const char *path) { struct node *node = cache_lookup(path); if (node == NULL) { char *pathcopy = g_strdup(path); node = g_new0(struct node, 1); g_hash_table_insert(cache.table, pathcopy, node); } return node; } void cache_add_attr(const char *path, const struct stat *stbuf, uint64_t wrctr) { struct node *node; if (!cache.on) return; pthread_mutex_lock(&cache.lock); if (wrctr == cache.write_ctr) { node = cache_get(path); node->stat = *stbuf; node->stat_valid = time(NULL) + cache.stat_timeout; if (node->stat_valid > node->valid) node->valid = node->stat_valid; cache_clean(); } pthread_mutex_unlock(&cache.lock); } static void cache_add_dir(const char *path, char **dir) { struct node *node; pthread_mutex_lock(&cache.lock); node = cache_get(path); g_strfreev(node->dir); node->dir = dir; node->dir_valid = time(NULL) + cache.dir_timeout; if (node->dir_valid > node->valid) node->valid = node->dir_valid; cache_clean(); pthread_mutex_unlock(&cache.lock); } static size_t my_strnlen(const char *s, size_t maxsize) { const char *p; for (p = s; maxsize && *p; maxsize--, p++); return p - s; } static void cache_add_link(const char *path, const char *link, size_t size) { struct node *node; pthread_mutex_lock(&cache.lock); node = cache_get(path); g_free(node->link); node->link = g_strndup(link, my_strnlen(link, size-1)); node->link_valid = time(NULL) + cache.link_timeout; if (node->link_valid > node->valid) node->valid = node->link_valid; cache_clean(); pthread_mutex_unlock(&cache.lock); } static int cache_get_attr(const char *path, struct stat *stbuf) { struct node *node; int err = -EAGAIN; pthread_mutex_lock(&cache.lock); node = cache_lookup(path); if (node != NULL) { time_t now = time(NULL); if (node->stat_valid - now >= 0) { *stbuf = node->stat; err = 0; } } pthread_mutex_unlock(&cache.lock); return err; } uint64_t cache_get_write_ctr(void) { uint64_t res; pthread_mutex_lock(&cache.lock); res = cache.write_ctr; pthread_mutex_unlock(&cache.lock); return res; } static int cache_getattr(const char *path, struct stat *stbuf) { int err = cache_get_attr(path, stbuf); if (err) { uint64_t wrctr = cache_get_write_ctr(); err = cache.next_oper->oper.getattr(path, stbuf); if (!err) cache_add_attr(path, stbuf, wrctr); } return err; } static int cache_readlink(const char *path, char *buf, size_t size) { struct node *node; int err; pthread_mutex_lock(&cache.lock); node = cache_lookup(path); if (node != NULL) { time_t now = time(NULL); if (node->link_valid - now >= 0) { strncpy(buf, node->link, size-1); buf[size-1] = '\0'; pthread_mutex_unlock(&cache.lock); return 0; } } pthread_mutex_unlock(&cache.lock); err = cache.next_oper->oper.readlink(path, buf, size); if (!err) cache_add_link(path, buf, size); return err; } static int cache_dirfill(fuse_cache_dirh_t ch, const char *name, const struct stat *stbuf) { int err = ch->filler(ch->h, name, 0, 0); if (!err) { g_ptr_array_add(ch->dir, g_strdup(name)); if (stbuf->st_mode & S_IFMT) { char *fullpath; const char *basepath = !ch->path[1] ? "" : ch->path; fullpath = g_strdup_printf("%s/%s", basepath, name); cache_add_attr(fullpath, stbuf, ch->wrctr); g_free(fullpath); } } return err; } static int cache_getdir(const char *path, fuse_dirh_t h, fuse_dirfil_t filler) { struct fuse_cache_dirhandle ch; int err; char **dir; struct node *node; pthread_mutex_lock(&cache.lock); node = cache_lookup(path); if (node != NULL && node->dir != NULL) { time_t now = time(NULL); if (node->dir_valid - now >= 0) { for(dir = node->dir; *dir != NULL; dir++) filler(h, *dir, 0, 0); pthread_mutex_unlock(&cache.lock); return 0; } } pthread_mutex_unlock(&cache.lock); ch.path = path; ch.h = h; ch.filler = filler; ch.dir = g_ptr_array_new(); ch.wrctr = cache_get_write_ctr(); err = cache.next_oper->cache_getdir(path, &ch, cache_dirfill); g_ptr_array_add(ch.dir, NULL); dir = (char **) ch.dir->pdata; if (!err) cache_add_dir(path, dir); else g_strfreev(dir); g_ptr_array_free(ch.dir, FALSE); return err; } static int cache_unity_dirfill(fuse_cache_dirh_t ch, const char *name, const struct stat *stbuf) { (void) stbuf; return ch->filler(ch->h, name, 0, 0); } static int cache_unity_getdir(const char *path, fuse_dirh_t h, fuse_dirfil_t filler) { struct fuse_cache_dirhandle ch; ch.h = h; ch.filler = filler; return cache.next_oper->cache_getdir(path, &ch, cache_unity_dirfill); } static int cache_mknod(const char *path, mode_t mode, dev_t rdev) { int err = cache.next_oper->oper.mknod(path, mode, rdev); if (!err) cache_invalidate_dir(path); return err; } static int cache_mkdir(const char *path, mode_t mode) { int err = cache.next_oper->oper.mkdir(path, mode); if (!err) cache_invalidate_dir(path); return err; } static int cache_unlink(const char *path) { int err = cache.next_oper->oper.unlink(path); if (!err) cache_invalidate_dir(path); return err; } static int cache_rmdir(const char *path) { int err = cache.next_oper->oper.rmdir(path); if (!err) cache_invalidate_dir(path); return err; } static int cache_symlink(const char *from, const char *to) { int err = cache.next_oper->oper.symlink(from, to); if (!err) cache_invalidate_dir(to); return err; } static int cache_rename(const char *from, const char *to) { int err = cache.next_oper->oper.rename(from, to); if (!err) cache_do_rename(from, to); return err; } static int cache_link(const char *from, const char *to) { int err = cache.next_oper->oper.link(from, to); if (!err) { cache_invalidate(from); cache_invalidate_dir(to); } return err; } static int cache_chmod(const char *path, mode_t mode) { int err = cache.next_oper->oper.chmod(path, mode); if (!err) cache_invalidate(path); return err; } static int cache_chown(const char *path, uid_t uid, gid_t gid) { int err = cache.next_oper->oper.chown(path, uid, gid); if (!err) cache_invalidate(path); return err; } static int cache_truncate(const char *path, off_t size) { int err = cache.next_oper->oper.truncate(path, size); if (!err) cache_invalidate(path); return err; } static int cache_utime(const char *path, struct utimbuf *buf) { int err = cache.next_oper->oper.utime(path, buf); if (!err) cache_invalidate(path); return err; } static int cache_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { int res = cache.next_oper->oper.write(path, buf, size, offset, fi); if (res >= 0) cache_invalidate_write(path); return res; } #if FUSE_VERSION >= 25 static int cache_create(const char *path, mode_t mode, struct fuse_file_info *fi) { int err = cache.next_oper->oper.create(path, mode, fi); if (!err) cache_invalidate_dir(path); return err; } static int cache_ftruncate(const char *path, off_t size, struct fuse_file_info *fi) { int err = cache.next_oper->oper.ftruncate(path, size, fi); if (!err) cache_invalidate(path); return err; } static int cache_fgetattr(const char *path, struct stat *stbuf, struct fuse_file_info *fi) { int err = cache_get_attr(path, stbuf); if (err) { uint64_t wrctr = cache_get_write_ctr(); err = cache.next_oper->oper.fgetattr(path, stbuf, fi); if (!err) cache_add_attr(path, stbuf, wrctr); } return err; } #endif static void cache_unity_fill(struct fuse_cache_operations *oper, struct fuse_operations *cache_oper) { #if FUSE_VERSION >= 23 cache_oper->init = oper->oper.init; #endif cache_oper->getattr = oper->oper.getattr; cache_oper->readlink = oper->oper.readlink; cache_oper->getdir = cache_unity_getdir; cache_oper->mknod = oper->oper.mknod; cache_oper->mkdir = oper->oper.mkdir; cache_oper->symlink = oper->oper.symlink; cache_oper->unlink = oper->oper.unlink; cache_oper->rmdir = oper->oper.rmdir; cache_oper->rename = oper->oper.rename; cache_oper->link = oper->oper.link; cache_oper->chmod = oper->oper.chmod; cache_oper->chown = oper->oper.chown; cache_oper->truncate = oper->oper.truncate; cache_oper->utime = oper->oper.utime; cache_oper->open = oper->oper.open; cache_oper->read = oper->oper.read; cache_oper->write = oper->oper.write; cache_oper->flush = oper->oper.flush; cache_oper->release = oper->oper.release; cache_oper->fsync = oper->oper.fsync; cache_oper->statfs = oper->oper.statfs; cache_oper->setxattr = oper->oper.setxattr; cache_oper->getxattr = oper->oper.getxattr; cache_oper->listxattr = oper->oper.listxattr; cache_oper->removexattr = oper->oper.removexattr; #if FUSE_VERSION >= 25 cache_oper->create = oper->oper.create; cache_oper->ftruncate = oper->oper.ftruncate; cache_oper->fgetattr = oper->oper.fgetattr; #endif } static void cache_fill(struct fuse_cache_operations *oper, struct fuse_operations *cache_oper) { cache_oper->getattr = oper->oper.getattr ? cache_getattr : NULL; cache_oper->readlink = oper->oper.readlink ? cache_readlink : NULL; cache_oper->getdir = oper->cache_getdir ? cache_getdir : NULL; cache_oper->mknod = oper->oper.mknod ? cache_mknod : NULL; cache_oper->mkdir = oper->oper.mkdir ? cache_mkdir : NULL; cache_oper->symlink = oper->oper.symlink ? cache_symlink : NULL; cache_oper->unlink = oper->oper.unlink ? cache_unlink : NULL; cache_oper->rmdir = oper->oper.rmdir ? cache_rmdir : NULL; cache_oper->rename = oper->oper.rename ? cache_rename : NULL; cache_oper->link = oper->oper.link ? cache_link : NULL; cache_oper->chmod = oper->oper.chmod ? cache_chmod : NULL; cache_oper->chown = oper->oper.chown ? cache_chown : NULL; cache_oper->truncate = oper->oper.truncate ? cache_truncate : NULL; cache_oper->utime = oper->oper.utime ? cache_utime : NULL; cache_oper->write = oper->oper.write ? cache_write : NULL; #if FUSE_VERSION >= 25 cache_oper->create = oper->oper.create ? cache_create : NULL; cache_oper->ftruncate = oper->oper.ftruncate ? cache_ftruncate : NULL; cache_oper->fgetattr = oper->oper.fgetattr ? cache_fgetattr : NULL; #endif } struct fuse_operations *cache_init(struct fuse_cache_operations *oper) { static struct fuse_operations cache_oper; cache.next_oper = oper; cache_unity_fill(oper, &cache_oper); if (cache.on) { cache_fill(oper, &cache_oper); pthread_mutex_init(&cache.lock, NULL); cache.table = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, free_node); if (cache.table == NULL) { fprintf(stderr, "failed to create cache\n"); return NULL; } } return &cache_oper; } static const struct fuse_opt cache_opts[] = { { "cache=yes", offsetof(struct cache, on), 1 }, { "cache=no", offsetof(struct cache, on), 0 }, { "cache_timeout=%u", offsetof(struct cache, stat_timeout), 0 }, { "cache_timeout=%u", offsetof(struct cache, dir_timeout), 0 }, { "cache_timeout=%u", offsetof(struct cache, link_timeout), 0 }, { "cache_stat_timeout=%u", offsetof(struct cache, stat_timeout), 0 }, { "cache_dir_timeout=%u", offsetof(struct cache, dir_timeout), 0 }, { "cache_link_timeout=%u", offsetof(struct cache, link_timeout), 0 }, FUSE_OPT_END }; int cache_parse_options(struct fuse_args *args) { cache.stat_timeout = DEFAULT_CACHE_TIMEOUT; cache.dir_timeout = DEFAULT_CACHE_TIMEOUT; cache.link_timeout = DEFAULT_CACHE_TIMEOUT; cache.on = 1; return fuse_opt_parse(args, &cache, cache_opts, NULL); } sshfs-fuse-2.5/configure.ac0000644000175000001440000000274712265242262012666 00000000000000AC_INIT(sshfs-fuse, 2.5) AM_INIT_AUTOMAKE AM_CONFIG_HEADER(config.h) AC_PROG_CC AM_PROG_CC_C_O CFLAGS="$CFLAGS -Wall -W" LIBS= AC_SEARCH_LIBS(dlsym, [dl]) sshnodelay_libs=$LIBS AC_SUBST(sshnodelay_libs) LIBS= AC_ARG_ENABLE(sshnodelay, [ --disable-sshnodelay Don't compile NODELAY workaround for ssh]) if test -z "$enable_sshnodelay"; then AC_MSG_CHECKING([OpenSSH version]) [eval `ssh -V 2>&1 | sed -n 's/^OpenSSH_\([1-9][0-9]*\)\.\([0-9][0-9]*\).*/ssh_major=\1 ssh_minor=\2/p'`] if test "x$ssh_major" != x -a "x$ssh_minor" != x; then if test $ssh_major -gt 4 -o \( $ssh_major = 4 -a $ssh_minor -ge 4 \); then AC_MSG_RESULT([$ssh_major.$ssh_minor >= 4.4, disabling NODELAY workaround]) enable_sshnodelay=no else AC_MSG_RESULT([$ssh_major.$ssh_minor < 4.4, enabling NODELAY workaround]) enable_sshnodelay=yes fi else AC_MSG_RESULT([not found]) fi fi if test "$enable_sshnodelay" = "yes"; then AC_DEFINE(SSH_NODELAY_WORKAROUND, 1, [Compile ssh NODELAY workaround]) fi AM_CONDITIONAL(SSH_NODELAY_SO, test "$enable_sshnodelay" = "yes") export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH PKG_CHECK_MODULES(SSHFS, [fuse >= 2.3 glib-2.0 gthread-2.0]) have_fuse_opt_parse=no oldlibs="$LIBS" LIBS="$LIBS $SSHFS_LIBS" AC_CHECK_FUNC([fuse_opt_parse], [have_fuse_opt_parse=yes]) LIBS="$oldlibs" if test "$have_fuse_opt_parse" = no; then CFLAGS="$CFLAGS -Icompat" fi AM_CONDITIONAL(FUSE_OPT_COMPAT, test "$have_fuse_opt_parse" = no) AC_CONFIG_FILES([Makefile]) AC_OUTPUT sshfs-fuse-2.5/README0000644000175000001440000000401312104163355011241 00000000000000Abstract ======== This is a filesystem client based on the SSH File Transfer Protocol. Since most SSH servers already support this protocol it is very easy to set up: i.e. on the server side there's nothing to do. On the client side mounting the filesystem is as easy as logging into the server with ssh. The idea of sshfs was taken from the SSHFS filesystem distributed with LUFS, which I found very useful. There were some limitations of that codebase, so I rewrote it. Features of this implementation are: - Based on FUSE (the best userspace filesystem framework for Linux ;) - Multithreading: more than one request can be on it's way to the server - Allowing large reads (max 64k) - Caching directory contents - Reconnect on failure Latest version ============== The latest version and more information can be found on http://fuse.sourceforge.net/sshfs.html How to mount a filesystem ========================= Once sshfs is installed (see next section) running it is very simple: sshfs hostname: mountpoint Note, that it's recommended to run it as user, not as root. For this to work the mountpoint must be owned by the user. If the username is different on the host you are connecting to, then use the "username@host:" form. If you need to enter a password sshfs will ask for it (actually it just runs ssh which ask for the password if needed). You can also specify a directory after the ":". The default is the home directory. Also many ssh options can be specified (see the manual pages for sftp(1) and ssh_config(5)), including the remote port number ('-oport=PORT') To unmount the filesystem: fusermount -u moutpoint Installing ========== First you need to download FUSE 2.2 or later from: http://fuse.sourceforge.net You also need to install the devel package for glib2.0. After installing FUSE, compile sshfs the usual way: ./configure make make install (as root) And you are ready to go. If checking out from CVS for the first time also do 'autoreconf -i' before doing './configure'. sshfs-fuse-2.5/cache.h0000644000175000001440000000166712104163355011611 00000000000000/* Caching file system proxy Copyright (C) 2004 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ #include #include #ifndef FUSE_VERSION #define FUSE_VERSION (FUSE_MAJOR_VERSION * 10 + FUSE_MINOR_VERSION) #endif typedef struct fuse_cache_dirhandle *fuse_cache_dirh_t; typedef int (*fuse_cache_dirfil_t) (fuse_cache_dirh_t h, const char *name, const struct stat *stbuf); struct fuse_cache_operations { struct fuse_operations oper; int (*cache_getdir) (const char *, fuse_cache_dirh_t, fuse_cache_dirfil_t); }; struct fuse_operations *cache_init(struct fuse_cache_operations *oper); int cache_parse_options(struct fuse_args *args); void cache_add_attr(const char *path, const struct stat *stbuf, uint64_t wrctr); void cache_invalidate(const char *path); uint64_t cache_get_write_ctr(void);