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2020-11-06ioctl_client.c: fix potential fd leakage problemZhiqiang Liu-3/+8
In ioctl_client.c, fd is not closed before return, thus it will cause fd leakage problem. Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com> Signed-off-by: Haotian Li <lihaotian9@huawei.com>
2020-09-20Allow caching symlinks in kernel page cache. (#551)Etienne Dublé-0/+2
This commit defines a new capability called `FUSE_CAP_CACHE_SYMLINKS`. It is off by default but you can now enable it by setting this flag in in the `want` field of the `fuse_conn_info` structure. When enabled, the kernel will save symlinks in its page cache, by making use of the feature introduced in kernel 4.20: https://github.com/torvalds/linux/commit/5571f1e65486be025f73fa6aa30fb03725d362a2
2020-09-09Updated example code to work with new API (#547)AKowshik-18/+42
2020-08-09Fixed typo in command to compile program (#536)AKowshik-1/+1
2020-05-14passthrough_ll: remove symlink fallbacks (#514)Miklos Szeredi-139/+14
* passthrough_ll/hp: remove symlink fallbacks Path lookup in the kernel has special rules for looking up magic symlinks under /proc. If a filesystem operation is instructed to follow symlinks (e.g. via AT_SYMLINK_FOLLOW or lack of AT_SYMLINK_NOFOLLOW), and the final component is such a proc symlink, then the target of the magic symlink is used for the operation, even if the target itself is a symlink. I.e. path lookup is always terminated after following a final magic symlink. I was erronously assuming that in the above case the target symlink would also be followed, and so workarounds were added for a couple of operations to handle the symlink case. Since the symlink can be handled simply by following the proc symlink, these workardouds are not needed. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Co-authored-by: Miklos Szeredi <mszeredi@redhat.com>
2020-04-20Do not require C++ compiler for buildingFabrice Fontaine-1/+1
Fixes: - http://autobuild.buildroot.org/results/a6e64213f2910b2b81e79cb1e96e558413d7f70a Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
2020-03-13State GPL version in comment (#485)Dr. David Alan Gilbert-19/+19
IN a bunch of comments we say 'under the terms of the GNU GPL', make it clear this is GPLv2 (as LICENSE says). Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2020-02-24passthrough_ll: Remove unneeded variable assignment (#501)philmd-2/+0
Fix warning reported by Clang static code analyzer: example/passthrough_ll.c:390:5: warning: Value stored to 'saverr' is never read saverr = ENOMEM; ^ ~~~~~~ Fixes: 4a92a82f2e2 Reported-by: Clang Static Analyzer Reviewed-by: Ján Tomko <jtomko@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-04Include limits.h because of PATH_MAX usage. (#498)maxice8-0/+1
Fixes build with musl libc on Alpine Linux.
2020-01-30examples: mark ops variables constant (#496)zsugabubus-13/+13
2020-01-24passthrough_ll: Use cache_readdir for directory open (#492)Misono Tomohiro-1/+1
Upstreamed from: https://www.redhat.com/archives/virtio-fs/2020-January/msg00106.html Since keep_cache(FOPEN_KEEP_CACHE) has no effect for directory as described in fuse_common.h, use cache_readdir(FOPEN_CACHE_DIR) for diretory open when cache=always mode. Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
2020-01-06passthrough_ll: pass correct errno to fuse_reply_err()Dr. David Alan Gilbert-1/+1
fuse_reply_err() expects the error code, not its negative. Upstreamed from https://www.redhat.com/archives/virtio-fs/2020-January/msg00000.html. Original commit message: lo_copy_file_range() passes -errno to fuse_reply_err() and then fuse_reply_err() changes it to errno again, so that subsequent fuse_send_reply_iov_nofree() catches the wrong errno.(i.e. reports "fuse: bad error value: ..."). Make fuse_send_reply_iov_nofree() accept the correct -errno by passing errno directly in lo_copy_file_range(). Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com> Reviewed-by: Eryu Guan <eguan@linux.alibaba.com> Co-authored-by: Xiao Yang <ice_yangxiao@163.com>
2019-12-31Make ioctl prototype conditional on FUSE_USE_VERSION. (#482)Bill Zissimopoulos-1/+1
Define FUSE_USE_VERSION < 35 to get old ioctl prototype with int commands; define FUSE_USE_VERSION >= 35 to get new ioctl prototype with unsigned int commands. Fixes #463.
2019-11-27Added support for FUSE_EXPLICIT_INVAL_DATA to enable (#474)Albert Chen-0/+2
2019-11-03Implement lseek operation (#457)Yuri Per-0/+50
2019-11-03passthrough_ll: drop lo_dirp->fd field (#464)Stefan Hajnoczi-7/+9
fdopendir(3) takes ownership of the file descriptor. The presence of the lo_dirp->fd field could lead to someone incorrectly adding a close(d->fd) cleanup call in the future. Do not store the file descriptor in struct lo_dirp since it is unused. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2019-09-10passthrough_ll: use fuse_log() instead of err()/errx()Stefan Hajnoczi-8/+17
Send everything through fuse_log() instead of writing directly to stderr. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-09-10passthrough_ll: use fuse_log()Stefan Hajnoczi-16/+16
Make use of fuse_log() instead of printing directly to stderr. This demonstrates unified logging and also caught the fact that I forgot to add fuse_log APIs to lib/fuse_versionscript. So it's basically a test case :). Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-09-09passthrough_ll: fix fallocate variant ifdefs (#449)Dr. David Alan Gilbert-2/+2
If fallocate isn't available we incorrectly check for the value of HAVE_POSIX_FALLOCATE rather than it being defined. We also fail to initialise 'err' in the case where neither are defined. Fixes: 5fc562c90d7925963467 ("Add fallocate and use it instead of ...") Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2019-05-15passthrough: fix unix-domain sockets on FreeBSD (#413)Alan Somers-19/+87
FreeBSD doesn't allow creating sockets using mknod(2). Instead, one has to use socket(2) and bind(2). Add appropriate logic to the examples and add a test case.
2019-05-12Fix includes of non-system headers.Nikolaus Rath-2/+2
Fixes: #415.
2019-05-09Added new example filesystemNikolaus Rath-0/+3363
passthrough_hp puts emphasis and performance and correctness, rather than simplicity.
2019-05-05Fixed permissions.Nikolaus Rath-0/+0
2019-04-18Add fallocate and use it instead of posix_fallocate if possible (#398)Liu Bo-0/+7
fuse.ko has supported FALLOC_FL_KEEP_SIZE and FALLOC_FL_PUNCH_HOLE at this moment and more modes may be supported in the future. fallocate(2) supports modes while posix_fallocate(2) does not, so this makes lo_fallocate use fallocate(2) instead. Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
2019-04-16Add documentation for opting out of opendir and releasedir (#391)Chad Austin-0/+2
2019-03-11Defined the (*ioctl)() commands as unsigned int (#381)Jean-Pierre André-1/+1
Instead of the Posix ioctl(2) command, Linux uses its own variant of ioctl() in which the commands are requested as "unsigned long" and truncated to 32 bits by the fuse kernel module. Transmitting the commands to user space file systems as "unsigned int" is a workaround for processing ioctl() commands which do not fit into a signed int.
2019-03-08Document fuse_fsync_in.fsync_flags and remove magic numbers (#375)Alan Somers-12/+4
2019-02-25hello_ll: Fix null pointer dereference (#363)Forty-Bot-0/+7
If hello_ll is invoked without a mountpoint, it will try to call fuse_session_mount anyway with the NULL mountpoint (which then causes a segfault). Print out a short help message instead (taken from passthrough_ll.c).
2019-01-22passthrough_ll: lo_create() should honor CACHE_NEVER (#345)Miklos Szeredi-0/+5
lo_create() did not honour CACHE_NEVER in lo_create(), which has an effect on how I/O is performed after the open. The value of CACHE_ALWAYS, which results in setting fi->keep_cache, only has an effect for the state of the cache at open, and since the file was just created the cache is always empty. Hence setting this doesn't have an effect on lo_create(), but keep it for symmetry with lo_open().
2018-12-29Fixed memory leak.Nikolaus Rath-5/+0
Fixes: #338.
2018-11-27Fix fd/inode leakNikolaus Rath-13/+19
If do_readdir() calls do_lookup(), but the latter fails, we still have to return any entries that we already stored in the readdir buffer to avoid leaking inodes. do_lookup() may fail if e.g. we reach the file descriptor limit.
2018-11-24Avoid needless telldir() call.Nikolaus Rath-1/+1
2018-11-24Fixed lookup-count leak in do_readdir().Nikolaus Rath-3/+7
2018-11-24Don't segfault when called with -h.Nikolaus Rath-1/+1
Fixes: #327
2018-11-19examples: add copy_file_range() support to passthrough(_fh)Niels de Vos-0/+98
The passthrough example filesystem can be used for validating the API and the implementation in the FUSE kernel module.
2018-11-09Don't crash if mountpoint is not specified.Nikolaus Rath-0/+7
Fixes: #319.
2018-10-10passthrough_ll: initialize unused memoryMiklos Szeredi-3/+4
For '.' and '..' entries only the file type in e.attr.st_mode and the inode number in e.attr.st_ino are used. But it's prudent to at least initialize the other fields of struct fuse_entry_param as well, instead of using random values from the stack.
2018-10-10passthrough_ll: allow configuring cachingMiklos Szeredi-8/+55
Caching can be controlled with the following options: "cache=never": disable caching "cache=normal": enable caching but also refresh after the timeout "cache=always": never refresh cache The timeout can be controlled with the "timeout=SEC" option, where SEC is the number of seconds and can be an arbitrary non-negative floating point number. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-10-10passthrough_ll: add *xattr() operationsMiklos Szeredi-0/+186
The extended attribute functionality is enabled with the "xattr" option (default) and disabled with the "no_xatt" option. New operations added: - getxattr - listxattr - setxattr - removexattr Caveat: none of these operations will work on a symbolic link, because it's difficult to implement that without races that can result in incorrect operation. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-10-10passthrough_ll: add flock()Miklos Szeredi-0/+23
Conditionally enable flock() locking on underlying filesystem, based on the flock/no_flock options. Default is "no_flock", meaning locking will be local to the fuse filesystem and won't be propagated to the filesystem passed through. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-10-10passthrough_ll: whitespace cleanupMiklos Szeredi-6/+5
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-10-10passthrough_ll: add forget_multi()Vivek Goyal-1/+16
Add method forget_multi() to forget multiple inodes in a single message. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-10-10passthrough_ll: add source optionVivek Goyal-2/+19
Right now, passthrough_ll will use "/" as source directory for passthrough. We need more flexibility where user can specify path of directory to be passed through. Hence add an option "source=<source-dir>". Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-10-10passthrough_ll: add some of the missing operationsMiklos Szeredi-1/+324
New operations added: - mkdir - mknod - symlink - link - unlink - rmdir - rename - setattr - fsyncdir - flush - fsync - statfs - fallocate Caveats: - The utimes(2) family of syscalls will fail on symlinks on 4.18 and earlier kernels. Hoping to add support to later kernels. - The link(2) and linkat(2) system calls will fail on symlinks unless running with privileges (CAP_DAC_READ_SEARCH). Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-10-10passthrough_ll: add is_symlink to lo_inodeMiklos Szeredi-0/+3
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-10-10passthrough_ll: set umask at startupMiklos Szeredi-0/+3
Like all the other passthrough examples. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-10-10passthrough_ll: fix refcount for "." and ".." entriesMiklos Szeredi-7/+19
Kernel is not expecting an elevated lookup count for the "." and ".." entries when doing READDIRPLUS. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-10-10passthrough_ll: add locking to inode cacheMiklos Szeredi-26/+51
Otherwise it may crash when running multithreaded. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-08-25Make meson build scripts subprojects friendlyMartin Blanchard-5/+2
Multiple meson build scripts improvements including: * Bump meson requirement to 0.40.1 (0.40 already required) * Declare a dependency object for main library * Stop using add_global_arguments() * Various minor style fixes
2018-07-23example/{hello,null}: Fix memory leaksRostislav Skudnov-1/+8
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