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| author | Alan Somers <asomers@FreeBSD.org> | 2022-10-07 14:46:22 +0000 |
|---|---|---|
| committer | Alan Somers <asomers@FreeBSD.org> | 2022-10-07 15:09:21 +0000 |
| commit | 46fcf947c6c8db1e1ceb3cbd75b69d1d1e494929 (patch) | |
| tree | 3e80fd573b6d36b4f32562081d4fb78a9538de12 | |
| parent | 6bf91573c153d48344d9eb66dd654e44ab2a1002 (diff) | |
| download | src-46fcf947c6c8db1e1ceb3cbd75b69d1d1e494929.tar.gz src-46fcf947c6c8db1e1ceb3cbd75b69d1d1e494929.zip | |
fusefs: during F_GETLK, don't change l_pid if no lock is found
PR: 266885
MFC after: 2 weeks
Submitted by: John Millikin <jmillikin@gmail.com>
Sponsored by: Axcient
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D36905
| -rw-r--r-- | sys/fs/fuse/fuse_vnops.c | 2 | ||||
| -rw-r--r-- | tests/sys/fs/fusefs/locks.cc | 16 |
2 files changed, 15 insertions, 3 deletions
diff --git a/sys/fs/fuse/fuse_vnops.c b/sys/fs/fuse/fuse_vnops.c index f96fc95dba30..30d0e557feb5 100644 --- a/sys/fs/fuse/fuse_vnops.c +++ b/sys/fs/fuse/fuse_vnops.c @@ -537,8 +537,8 @@ fuse_vnop_advlock(struct vop_advlock_args *ap) if (err == 0 && op == FUSE_GETLK) { flo = fdi.answ; fl->l_type = flo->lk.type; - fl->l_pid = flo->lk.pid; if (flo->lk.type != F_UNLCK) { + fl->l_pid = flo->lk.pid; fl->l_start = flo->lk.start; if (flo->lk.end == INT64_MAX) fl->l_len = 0; diff --git a/tests/sys/fs/fusefs/locks.cc b/tests/sys/fs/fusefs/locks.cc index cace779e981a..aeb24704624b 100644 --- a/tests/sys/fs/fusefs/locks.cc +++ b/tests/sys/fs/fusefs/locks.cc @@ -278,12 +278,24 @@ TEST_F(Getlk, no_locks) ASSERT_LE(0, fd) << strerror(errno); fl.l_start = 10; fl.l_len = 1000; - fl.l_pid = 0; + fl.l_pid = 42; fl.l_type = F_RDLCK; fl.l_whence = SEEK_SET; - fl.l_sysid = 0; + fl.l_sysid = 42; ASSERT_NE(-1, fcntl(fd, F_GETLK, &fl)) << strerror(errno); + + /* + * If no lock is found that would prevent this lock from being created, + * the structure is left unchanged by this system call except for the + * lock type which is set to F_UNLCK. + */ ASSERT_EQ(F_UNLCK, fl.l_type); + ASSERT_EQ(fl.l_pid, 42); + ASSERT_EQ(fl.l_start, 10); + ASSERT_EQ(fl.l_len, 1000); + ASSERT_EQ(fl.l_whence, SEEK_SET); + ASSERT_EQ(fl.l_sysid, 42); + leak(fd); } |