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9p: explicitly deny setlease attempts

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[ Upstream commit 7a84602297d36617dbdadeba55a2567031e5165b ]

9p is a remote network protocol, and it doesn't support asynchronous
notifications from the server. Ensure that we don't hand out any leases
since we can't guarantee they'll be broken when a file's contents
change.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 1b90be6698e8d67a2edb8d260e9654d539e7cb51)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
This commit is contained in:
Jeff Layton 2024-03-19 12:34:45 -04:00 committed by Vegard Nossum
parent 83f6d606db
commit 8b2c6a57cf
1 changed files with 2 additions and 0 deletions
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2
fs/9p/vfs_file.c
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@ -691,6 +691,7 @@ const struct file_operations v9fs_file_operations = {
.lock = v9fs_file_lock,
.mmap = generic_file_readonly_mmap,
.fsync = v9fs_file_fsync,
.setlease = simple_nosetlease,
};
const struct file_operations v9fs_file_operations_dotl = {
@ -726,4 +727,5 @@ const struct file_operations v9fs_mmap_file_operations_dotl = {
.flock = v9fs_file_flock_dotl,
.mmap = v9fs_mmap_file_mmap,
.fsync = v9fs_file_fsync_dotl,
.setlease = simple_nosetlease,
};