Address the following defects reported by Coverity:
* Structurally dead code (CID 1404366): set m_quit before FAIL, not after
* Unchecked return value of sysctlbyname (CID 1404321)
* Unchecked return value of stat(2) (CID 1404471)
* Unchecked return value of open(2) (CID 1404402, 1404529)
* Unchecked return value of dup(2) (CID 1404478)
* Buffer overflows. These are all false positives caused by the fact that
Coverity thinks I'm using a buffer to store strings, when in fact I'm
really just using it to store a byte array that happens to be initialized
with a string. I'm changing the type from char to uint8_t in the hopes
that it will placate Coverity. (CID 1404338, 1404350, 1404367, 1404376,
1404379, 1404381, 1404388, 1404403, 1404425, 1404433, 1404434, 1404474,
1404480, 1404484, 1404503, 1404505)
* False positive file descriptor leak. I'm going to try to fix this with
Coverity modeling, but I'll also change an EXPECT to ASSERT so we don't
perform meaningless assertions after the failure. (CID 1404320, 1404324,
1404440, 1404445).
* Unannotated file descriptor leak. This will be followed up by a Coverity
modeling change. (CID 1404326, 1404334, 1404336, 1404357, 1404361,
1404372, 1404391, 1404395, 1404409, 1404430, 1404448, 1404451, 1404455,
1404457, 1404458, 1404460)
* Uninitialized variables in C++ constructors (CID 1404327, 1404346). In the
case of m_maxphys, this actually led to part of the FUSE_INIT's response
being set to stack garbage during the WriteCluster::clustering test.
* Uninitialized sun_len field in struct sockaddr_un (CID 1404330, 1404371,
1404429).
Reported by: Coverity
Reviewed by: emaste
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21457
closing a file descriptor causes FUSE activity that is superfluous to the
purpose of most tests, but would nonetheless require matching expectations.
Rather than do that, most tests deliberately leak file descriptors instead.
This commit moves the leakage from each test into two trivial functions:
leak and leakdir. Hopefully Coverity will only complain about those
functions and not all of their callers.
Sponsored by: The FreeBSD Foundation
As of protocol 7.23, fuse file systems can specify their cache behavior on a
per-mountpoint basis. If they set FUSE_WRITEBACK_CACHE in
fuse_init_out.flags, then they'll get the writeback cache. If not, then
they'll get the writethrough cache. If they set FOPEN_DIRECT_IO in every
FUSE_OPEN response, then they'll get no cache at all.
The old vfs.fusefs.data_cache_mode sysctl is ignored for servers that use
protocol 7.23 or later. However, it's retained for older servers,
especially for those running in jails that lack access to the new protocol.
This commit also fixes two other minor test bugs:
* WriteCluster:SetUp was using an uninitialized variable.
* Read.direct_io_pread wasn't verifying that the cache was actually
bypassed.
Sponsored by: The FreeBSD Foundation
I originally thought that the kernel would be responsible for ctime in
protocol 7.23. But now I realize that's not the case. The server is
responsible for ctime. The kernel only sets it when there are dirty writes
cached, because that's when the server can't.
Sponsored by: The FreeBSD Foundation
* Prefer std::unique_ptr to raw pointers
* Prefer pass-by-reference to pass-by-pointer
* Prefer static_cast to C-style cast, unless it's too much typing
Reported by: ngie
Sponsored by: The FreeBSD Foundation
* Fix printf format strings on 32-bit OSes
* Fix -Wclass-memaccess violation on GCC-8 caused by using memset on an object
of non-trivial type.
* Fix memory leak in MockFS::init
* Fix -Wcast-align error on i386 in expect_readdir
* Fix some heterogenous comparison errors on 32-bit OSes.
Sponsored by: The FreeBSD Foundation
If a user sets both atime and mtime to UTIME_NOW when calling a syscall like
utimensat(2), allow the server to choose what "now" means. Due to the
design of FreeBSD's VFS, it's not possible to do this for just one of atime
or mtime; it's all or none.
PR: 237181
Sponsored by: The FreeBSD Foundation
This commit upgrades the FUSE API to protocol 7.9 and adds unit tests for
backwards compatibility with servers built for version 7.8. It doesn't
implement any of 7.9's new features yet.
Sponsored by: The FreeBSD Foundation
FUSE_LINK returns a new set of attributes. fusefs should cache them just
like it does during other VOPs. This is not only a matter of performance
but of correctness too; without caching the new attributes the vnode's nlink
value would be out-of-date.
Reported by: pjdfstest
Sponsored by: The FreeBSD Foundation
r346162 factored out v_inval_buf_range from vtruncbuf, but it made an error
in the interface between the two. The result was a failure to remove
buffers past the first. Surprisingly, I couldn't reproduce the failure with
file systems other than fuse.
Also, modify fusefs's truncate_discards_cached_data test to catch this bug.
PR: 346162
Sponsored by: The FreeBSD Foundation
* Eliminate fuse_access_param. Whatever it was supposed to do, it seems
like it was never complete. The only real function it ever seems to have
had was a minor performance optimization, which I've already eliminated.
* Make extended attribute operations obey the allow_other mount option.
* Allow unprivileged access to the SYSTEM extattr namespace when
-o default_permissions is not in use.
* Disallow setextattr and deleteextattr on read-only mounts.
* Add tests for a few more error cases.
Sponsored by: The FreeBSD Foundation
Normally all permission checking is done in the fuse server. But when -o
default_permissions is used, it should be done in the kernel instead. This
commit adds appropriate permission checks through fusefs when -o
default_permissions is used. However, sticky bit checks aren't working yet.
I'll handle those in a follow-up commit.
There are no checks for file flags, because those aren't supported by our
version of the FUSE protocol. Nor is there any support for ACLs, though
that could be added if there were any demand.
PR: 216391
Reported by: hiyorin@gmail.com
Sponsored by: The FreeBSD Foundation
FUSE_LOOKUP, FUSE_GETATTR, FUSE_SETATTR, FUSE_MKDIR, FUSE_LINK,
FUSE_SYMLINK, FUSE_MKNOD, and FUSE_CREATE all return file attributes with a
cache validity period. fusefs will now cache the attributes, if the server
returns a non-zero cache validity period.
This change does _not_ implement finite attr cache timeouts. That will
follow as part of PR 235773.
PR: 235775
Reported by: cem
Sponsored by: The FreeBSD Foundation
During truncate, fusefs was discarding entire cached blocks, but it wasn't
zeroing out the unused portion of a final partial block. This resulted in
reads returning stale data.
PR: 233783
Reported by: fsx
Sponsored by: The FreeBSD Foundation
