[PATCH] NLM: cleanup for blocked locks. (4f15e2b1) · Commits · e / devices / android_kernel_xiaomi_markw

fs/lockd/clntlock.c

+6 −12

Original line number	Diff line number	Diff line
		@@ -31,7 +31,7 @@ static int reclaimer(void *ptr);
		* This is the representation of a blocked client lock.
		*/
		struct nlm_wait {
		struct nlm_wait * b_next; /* linked list */
		struct list_head b_list; /* linked list */
		wait_queue_head_t b_wait; /* where to wait on */
		struct nlm_host * b_host;
		struct file_lock * b_lock; /* local file lock */
		@@ -39,7 +39,7 @@ struct nlm_wait {
		u32 b_status; /* grant callback status */
		};

		static struct nlm_wait * nlm_blocked;
		static LIST_HEAD(nlm_blocked);

		/*
		* Block on a lock
		@@ -55,8 +55,7 @@ nlmclnt_block(struct nlm_host host, struct file_lock fl, u32 *statp)
		block.b_lock = fl;
		init_waitqueue_head(&block.b_wait);
		block.b_status = NLM_LCK_BLOCKED;
		block.b_next = nlm_blocked;
		nlm_blocked = &block;
		list_add(&block.b_list, &nlm_blocked);

		/* Remember pseudo nsm state */
		pstate = host->h_state;
		@@ -71,12 +70,7 @@ nlmclnt_block(struct nlm_host host, struct file_lock fl, u32 *statp)
		*/
		sleep_on_timeout(&block.b_wait, 30*HZ);

		for (head = &nlm_blocked; head; head = &(head)->b_next) {
		if (*head == &block) {
		*head = block.b_next;
		break;
		}
		}
		list_del(&block.b_list);

		if (!signalled()) {
		*statp = block.b_status;
		@@ -105,7 +99,7 @@ nlmclnt_grant(struct nlm_lock *lock)
		* Look up blocked request based on arguments.
		* Warning: must not use cookie to match it!
		*/
		for (block = nlm_blocked; block; block = block->b_next) {
		list_for_each_entry(block, &nlm_blocked, b_list) {
		if (nlm_compare_locks(block->b_lock, &lock->fl))
		break;
		}
		@@ -230,7 +224,7 @@ restart:
		host->h_reclaiming = 0;

		/* Now, wake up all processes that sleep on a blocked lock */
		for (block = nlm_blocked; block; block = block->b_next) {
		list_for_each_entry(block, &nlm_blocked, b_list) {
		if (block->b_host == host) {
		block->b_status = NLM_LCK_DENIED_GRACE_PERIOD;
		wake_up(&block->b_wait);