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authorTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-20 13:44:39 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-20 13:44:39 -0500
commit5e1abf8cb713a0b94f5a400c7b9b797990cd9dec (patch)
tree717a5eb95c4615855edc5f66268154cbe4118326 /fs/lockd/svclock.c
parent6849c0cab69f5d1a0fc7b05fa5bfb3dec53f86df (diff)
downloadlwn-5e1abf8cb713a0b94f5a400c7b9b797990cd9dec.tar.gz
lwn-5e1abf8cb713a0b94f5a400c7b9b797990cd9dec.zip
lockd: Clean up of the server-side GRANTED code
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/lockd/svclock.c')
-rw-r--r--fs/lockd/svclock.c56
1 files changed, 53 insertions, 3 deletions
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index 20caeceffb14..3c7dd956d9c1 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -43,6 +43,8 @@ static void nlmsvc_release_block(struct nlm_block *block);
static void nlmsvc_insert_block(struct nlm_block *block, unsigned long);
static int nlmsvc_remove_block(struct nlm_block *block);
+static int nlmsvc_setgrantargs(struct nlm_rqst *call, struct nlm_lock *lock);
+static void nlmsvc_freegrantargs(struct nlm_rqst *call);
static const struct rpc_call_ops nlmsvc_grant_ops;
/*
@@ -196,7 +198,7 @@ nlmsvc_create_block(struct svc_rqst *rqstp, struct nlm_file *file,
locks_init_lock(&block->b_call.a_res.lock.fl);
kref_init(&block->b_count);
- if (!nlmclnt_setgrantargs(&block->b_call, lock))
+ if (!nlmsvc_setgrantargs(&block->b_call, lock))
goto failed_free;
/* Set notifier function for VFS, and init args */
@@ -264,7 +266,7 @@ static void nlmsvc_free_block(struct kref *kref)
if (block->b_host)
nlm_release_host(block->b_host);
- nlmclnt_freegrantargs(&block->b_call);
+ nlmsvc_freegrantargs(&block->b_call);
kfree(block);
}
@@ -299,6 +301,49 @@ nlmsvc_traverse_blocks(struct nlm_host *host, struct nlm_file *file, int action)
}
/*
+ * Initialize arguments for GRANTED call. The nlm_rqst structure
+ * has been cleared already.
+ */
+static int nlmsvc_setgrantargs(struct nlm_rqst *call, struct nlm_lock *lock)
+{
+ locks_copy_lock(&call->a_args.lock.fl, &lock->fl);
+ memcpy(&call->a_args.lock.fh, &lock->fh, sizeof(call->a_args.lock.fh));
+ call->a_args.lock.caller = system_utsname.nodename;
+ call->a_args.lock.oh.len = lock->oh.len;
+
+ /* set default data area */
+ call->a_args.lock.oh.data = call->a_owner;
+ call->a_args.lock.svid = lock->fl.fl_pid;
+
+ if (lock->oh.len > NLMCLNT_OHSIZE) {
+ void *data = kmalloc(lock->oh.len, GFP_KERNEL);
+ if (!data) {
+ nlmsvc_freegrantargs(call);
+ return 0;
+ }
+ call->a_args.lock.oh.data = (u8 *) data;
+ }
+
+ memcpy(call->a_args.lock.oh.data, lock->oh.data, lock->oh.len);
+ return 1;
+}
+
+static void nlmsvc_freegrantargs(struct nlm_rqst *call)
+{
+ struct file_lock *fl = &call->a_args.lock.fl;
+ /*
+ * Check whether we allocated memory for the owner.
+ */
+ if (call->a_args.lock.oh.data != (u8 *) call->a_owner) {
+ kfree(call->a_args.lock.oh.data);
+ }
+ if (fl->fl_ops && fl->fl_ops->fl_release_private)
+ fl->fl_ops->fl_release_private(fl);
+ if (fl->fl_lmops && fl->fl_lmops->fl_release_private)
+ fl->fl_lmops->fl_release_private(fl);
+}
+
+/*
* Attempt to establish a lock, and if it can't be granted, block it
* if required.
*/
@@ -600,11 +645,16 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data)
}
nlmsvc_insert_block(block, timeout);
svc_wake_up(block->b_daemon);
- nlmsvc_release_block(block);
+}
+
+void nlmsvc_grant_release(void *data)
+{
+ nlmsvc_release_block(data);
}
static const struct rpc_call_ops nlmsvc_grant_ops = {
.rpc_call_done = nlmsvc_grant_callback,
+ .rpc_release = nlmsvc_grant_release,
};
/*