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| author | Sergey Vlasov <vsu@altlinux.ru> | 2010-11-28 22:04:05 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-12-08 01:30:43 +0100 |
| commit | 21ac19d484a8ffb66f64487846c8d53afef04d2b (patch) | |
| tree | 684f635b6d009a05e50499dfec4f7a7f96e0829d /fs | |
| parent | nfs: Discard ACL cache on mode update (diff) | |
| download | linux-21ac19d484a8ffb66f64487846c8d53afef04d2b.tar.xz linux-21ac19d484a8ffb66f64487846c8d53afef04d2b.zip | |
NFS: Fix fcntl F_GETLK not reporting some conflicts
The commit 129a84de2347002f09721cda3155ccfd19fade40 (locks: fix F_GETLK
regression (failure to find conflicts)) fixed the posix_test_lock()
function by itself, however, its usage in NFS changed by the commit
9d6a8c5c213e34c475e72b245a8eb709258e968c (locks: give posix_test_lock
same interface as ->lock) remained broken - subsequent NFS-specific
locking code received F_UNLCK instead of the user-specified lock type.
To fix the problem, fl->fl_type needs to be saved before the
posix_test_lock() call and restored if no local conflicts were reported.
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=23892
Tested-by: Alexander Morozov <amorozov@etersoft.ru>
Signed-off-by: Sergey Vlasov <vsu@altlinux.ru>
Cc: <stable@kernel.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfs/file.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 60677f9f1311..7bf029ef4084 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -693,6 +693,7 @@ do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) { struct inode *inode = filp->f_mapping->host; int status = 0; + unsigned int saved_type = fl->fl_type; /* Try local locking first */ posix_test_lock(filp, fl); @@ -700,6 +701,7 @@ do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) /* found a conflict */ goto out; } + fl->fl_type = saved_type; if (nfs_have_delegation(inode, FMODE_READ)) goto out_noconflict; |