Date: Thu, 8 Apr 2021 21:34:32 GMT From: Alan Somers <asomers@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 9a9c9e744b51 - stable/12 - fusefs: fix two bugs regarding fcntl file locks Message-ID: <202104082134.138LYWL6015513@gitrepo.freebsd.org>
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The branch stable/12 has been updated by asomers: URL: https://cgit.FreeBSD.org/src/commit/?id=9a9c9e744b51e00f3446afb922500e40845cddfa commit 9a9c9e744b51e00f3446afb922500e40845cddfa Author: Alan Somers <asomers@FreeBSD.org> AuthorDate: 2021-03-18 20:27:27 +0000 Commit: Alan Somers <asomers@FreeBSD.org> CommitDate: 2021-04-08 21:33:55 +0000 fusefs: fix two bugs regarding fcntl file locks 1) F_SETLKW (blocking) operations would be sent to the FUSE server as F_SETLK (non-blocking). 2) Release operations, F_SETLK with lk_type = F_UNLCK, would simply return EINVAL. PR: 253500 Reported by: John Millikin <jmillikin@gmail.com> (cherry picked from commit 929acdb19acb67cc0e6ee5439df98e28a84d4772) fusefs: fix a dead store in fuse_vnop_advlock kevans actually caught this in the original review and I fixed it, but then I committed an older copy of the branch. Whoops. Reported by: kevans Differential Revision: https://reviews.freebsd.org/D29031 (cherry picked from commit 9c5aac8f2e84ca4bbdf82514302c08c0453ec59b) --- sys/fs/fuse/fuse_vnops.c | 9 ++++++--- tests/sys/fs/fusefs/flush.cc | 12 ++++++++++- tests/sys/fs/fusefs/locks.cc | 45 +++++++++++++++++++++++++++++++++++++++++- tests/sys/fs/fusefs/release.cc | 12 ++++++++++- 4 files changed, 72 insertions(+), 6 deletions(-) diff --git a/sys/fs/fuse/fuse_vnops.c b/sys/fs/fuse/fuse_vnops.c index eb99e1cc09c0..d30fc32d1dc5 100644 --- a/sys/fs/fuse/fuse_vnops.c +++ b/sys/fs/fuse/fuse_vnops.c @@ -412,10 +412,13 @@ fuse_vnop_advlock(struct vop_advlock_args *ap) op = FUSE_GETLK; break; case F_SETLK: - op = FUSE_SETLK; + if (flags & F_WAIT) + op = FUSE_SETLKW; + else + op = FUSE_SETLK; break; - case F_SETLKW: - op = FUSE_SETLKW; + case F_UNLCK: + op = FUSE_SETLK; break; default: return EINVAL; diff --git a/tests/sys/fs/fusefs/flush.cc b/tests/sys/fs/fusefs/flush.cc index 4d5a87bd66d5..d31a9fdaa386 100644 --- a/tests/sys/fs/fusefs/flush.cc +++ b/tests/sys/fs/fusefs/flush.cc @@ -210,6 +210,16 @@ TEST_F(FlushWithLocks, unlock_on_close) ResultOf([=](auto in) { return (in.header.opcode == FUSE_SETLK && in.header.nodeid == ino && + in.body.setlk.lk.type == F_RDLCK && + in.body.setlk.fh == FH); + }, Eq(true)), + _) + ).WillOnce(Invoke(ReturnErrno(0))); + EXPECT_CALL(*m_mock, process( + ResultOf([=](auto in) { + return (in.header.opcode == FUSE_SETLK && + in.header.nodeid == ino && + in.body.setlk.lk.type == F_UNLCK && in.body.setlk.fh == FH); }, Eq(true)), _) @@ -224,7 +234,7 @@ TEST_F(FlushWithLocks, unlock_on_close) fl.l_type = F_RDLCK; fl.l_whence = SEEK_SET; fl.l_sysid = 0; - ASSERT_NE(-1, fcntl(fd, F_SETLKW, &fl)) << strerror(errno); + ASSERT_NE(-1, fcntl(fd, F_SETLK, &fl)) << strerror(errno); fd2 = open(FULLPATH, O_WRONLY); ASSERT_LE(0, fd2) << strerror(errno); diff --git a/tests/sys/fs/fusefs/locks.cc b/tests/sys/fs/fusefs/locks.cc index f3f1d42637d9..49f495412259 100644 --- a/tests/sys/fs/fusefs/locks.cc +++ b/tests/sys/fs/fusefs/locks.cc @@ -72,6 +72,23 @@ void expect_setlk(uint64_t ino, pid_t pid, uint64_t start, uint64_t end, return (in.header.opcode == FUSE_SETLK && in.header.nodeid == ino && in.body.setlk.fh == FH && + in.body.setlk.owner == (uint32_t)pid && + in.body.setlk.lk.start == start && + in.body.setlk.lk.end == end && + in.body.setlk.lk.type == type && + in.body.setlk.lk.pid == (uint64_t)pid); + }, Eq(true)), + _) + ).WillOnce(Invoke(ReturnErrno(err))); +} +void expect_setlkw(uint64_t ino, pid_t pid, uint64_t start, uint64_t end, + uint32_t type, int err) +{ + EXPECT_CALL(*m_mock, process( + ResultOf([=](auto in) { + return (in.header.opcode == FUSE_SETLKW && + in.header.nodeid == ino && + in.body.setlkw.fh == FH && in.body.setlkw.owner == (uint32_t)pid && in.body.setlkw.lk.start == start && in.body.setlkw.lk.end == end && @@ -343,6 +360,32 @@ TEST_F(SetlkFallback, local) leak(fd); } +/* Clear a lock with FUSE_SETLK */ +TEST_F(Setlk, clear) +{ + const char FULLPATH[] = "mountpoint/some_file.txt"; + const char RELPATH[] = "some_file.txt"; + uint64_t ino = 42; + struct flock fl; + int fd; + pid_t pid = 1234; + + expect_lookup(RELPATH, ino); + expect_open(ino, 0, 1); + expect_setlk(ino, pid, 10, 1009, F_UNLCK, 0); + + fd = open(FULLPATH, O_RDWR); + ASSERT_LE(0, fd) << strerror(errno); + fl.l_start = 10; + fl.l_len = 1000; + fl.l_pid = pid; + fl.l_type = F_UNLCK; + fl.l_whence = SEEK_SET; + fl.l_sysid = 0; + ASSERT_NE(-1, fcntl(fd, F_SETLK, &fl)) << strerror(errno); + leak(fd); +} + /* Set a new lock with FUSE_SETLK */ TEST_F(Setlk, set) { @@ -465,7 +508,7 @@ TEST_F(Setlkw, set) expect_lookup(RELPATH, ino); expect_open(ino, 0, 1); - expect_setlk(ino, pid, 10, 1009, F_RDLCK, 0); + expect_setlkw(ino, pid, 10, 1009, F_RDLCK, 0); fd = open(FULLPATH, O_RDWR); ASSERT_LE(0, fd) << strerror(errno); diff --git a/tests/sys/fs/fusefs/release.cc b/tests/sys/fs/fusefs/release.cc index 3caf8589352d..daa3ce39f573 100644 --- a/tests/sys/fs/fusefs/release.cc +++ b/tests/sys/fs/fusefs/release.cc @@ -206,6 +206,16 @@ TEST_F(ReleaseWithLocks, unlock_on_close) ResultOf([=](auto in) { return (in.header.opcode == FUSE_SETLK && in.header.nodeid == ino && + in.body.setlk.lk.type == F_RDLCK && + in.body.setlk.fh == FH); + }, Eq(true)), + _) + ).WillOnce(Invoke(ReturnErrno(0))); + EXPECT_CALL(*m_mock, process( + ResultOf([=](auto in) { + return (in.header.opcode == FUSE_SETLK && + in.header.nodeid == ino && + in.body.setlk.lk.type == F_UNLCK && in.body.setlk.fh == FH); }, Eq(true)), _) @@ -221,7 +231,7 @@ TEST_F(ReleaseWithLocks, unlock_on_close) fl.l_type = F_RDLCK; fl.l_whence = SEEK_SET; fl.l_sysid = 0; - ASSERT_NE(-1, fcntl(fd, F_SETLKW, &fl)) << strerror(errno); + ASSERT_NE(-1, fcntl(fd, F_SETLK, &fl)) << strerror(errno); ASSERT_EQ(0, close(fd)) << strerror(errno); }
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