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NFS: Ensure that NFS file unlock waits for readahead to complete

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Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-04-08 21:49:53 -04:00
parent 577b42327d
commit 7a8203d8cb
1 changed files with 9 additions and 0 deletions
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9
fs/nfs/file.c
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@ -744,6 +744,7 @@ static int
do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
{
struct inode *inode = filp->f_mapping->host;
struct nfs_lock_context *l_ctx;
int status;
/*
@ -752,6 +753,14 @@ do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
*/
nfs_sync_mapping(filp->f_mapping);
l_ctx = nfs_get_lock_context(nfs_file_open_context(filp));
if (!IS_ERR(l_ctx)) {
status = nfs_iocounter_wait(&l_ctx->io_count);
nfs_put_lock_context(l_ctx);
if (status < 0)
return status;
}
/* NOTE: special case
* If we're signalled while cleaning up locks on process exit, we
* still need to complete the unlock.