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authorTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-20 21:44:44 +0300
committerTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-20 21:44:44 +0300
commit3a649b884637c4fdff50a6beebc3dc0e6082e048 (patch)
tree042455741f079fdbd4d33cd7da61c1c9e68db477 /fs/lockd/clntlock.c
parentd72b7a6b26b9009b7a05117fe2e04b3a73ae4a5c (diff)
downloadlinux-3a649b884637c4fdff50a6beebc3dc0e6082e048.tar.xz
NLM: Simplify client locks
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/lockd/clntlock.c')
-rw-r--r--fs/lockd/clntlock.c43
1 files changed, 16 insertions, 27 deletions
diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c
index 7cf41c1e1a88..bce744468708 100644
--- a/fs/lockd/clntlock.c
+++ b/fs/lockd/clntlock.c
@@ -44,32 +44,25 @@ static LIST_HEAD(nlm_blocked);
/*
* Queue up a lock for blocking so that the GRANTED request can see it
*/
-int nlmclnt_prepare_block(struct nlm_rqst *req, struct nlm_host *host, struct file_lock *fl)
+struct nlm_wait *nlmclnt_prepare_block(struct nlm_host *host, struct file_lock *fl)
{
struct nlm_wait *block;
- BUG_ON(req->a_block != NULL);
block = kmalloc(sizeof(*block), GFP_KERNEL);
- if (block == NULL)
- return -ENOMEM;
- block->b_host = host;
- block->b_lock = fl;
- init_waitqueue_head(&block->b_wait);
- block->b_status = NLM_LCK_BLOCKED;
-
- list_add(&block->b_list, &nlm_blocked);
- req->a_block = block;
-
- return 0;
+ if (block != NULL) {
+ block->b_host = host;
+ block->b_lock = fl;
+ init_waitqueue_head(&block->b_wait);
+ block->b_status = NLM_LCK_BLOCKED;
+ list_add(&block->b_list, &nlm_blocked);
+ }
+ return block;
}
-void nlmclnt_finish_block(struct nlm_rqst *req)
+void nlmclnt_finish_block(struct nlm_wait *block)
{
- struct nlm_wait *block = req->a_block;
-
if (block == NULL)
return;
- req->a_block = NULL;
list_del(&block->b_list);
kfree(block);
}
@@ -77,15 +70,14 @@ void nlmclnt_finish_block(struct nlm_rqst *req)
/*
* Block on a lock
*/
-long nlmclnt_block(struct nlm_rqst *req, long timeout)
+int nlmclnt_block(struct nlm_wait *block, struct nlm_rqst *req, long timeout)
{
- struct nlm_wait *block = req->a_block;
long ret;
/* A borken server might ask us to block even if we didn't
* request it. Just say no!
*/
- if (!req->a_args.block)
+ if (block == NULL)
return -EAGAIN;
/* Go to sleep waiting for GRANT callback. Some servers seem
@@ -99,13 +91,10 @@ long nlmclnt_block(struct nlm_rqst *req, long timeout)
ret = wait_event_interruptible_timeout(block->b_wait,
block->b_status != NLM_LCK_BLOCKED,
timeout);
-
- if (block->b_status != NLM_LCK_BLOCKED) {
- req->a_res.status = block->b_status;
- block->b_status = NLM_LCK_BLOCKED;
- }
-
- return ret;
+ if (ret < 0)
+ return -ERESTARTSYS;
+ req->a_res.status = block->b_status;
+ return 0;
}
/*