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Commit 1b90be66 authored by Jeff Layton's avatar Jeff Layton Committed by Greg Kroah-Hartman
Browse files

9p: explicitly deny setlease attempts 



[ 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: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarEric Van Hensbergen <ericvh@kernel.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 0ce26760

fs/9p/vfs_file.c

+2 −0
Original line number Diff line number Diff line
@@ -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,

};