* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
-#include <linux/config.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
}
/*
- * Find a block for a given lock and optionally remove it from
- * the list.
+ * Find a block for a given lock
*/
static struct nlm_block *
-nlmsvc_lookup_block(struct nlm_file *file, struct nlm_lock *lock, int remove)
+nlmsvc_lookup_block(struct nlm_file *file, struct nlm_lock *lock)
{
struct nlm_block **head, *block;
struct file_lock *fl;
(long long)fl->fl_end, fl->fl_type,
nlmdbg_cookie2a(&block->b_call->a_args.cookie));
if (block->b_file == file && nlm_compare_locks(fl, &lock->fl)) {
- if (remove) {
- *head = block->b_next;
- block->b_queued = 0;
- }
kref_get(&block->b_count);
return block;
}
block->b_daemon = rqstp->rq_server;
block->b_host = host;
block->b_file = file;
+ file->f_count++;
/* Add to file's list of blocks */
block->b_fnext = file->f_blocks;
dprintk("lockd: freeing block %p...\n", block);
+ down(&file->f_sema);
/* Remove block from file's list of blocks */
for (bp = &file->f_blocks; *bp; bp = &(*bp)->b_fnext) {
if (*bp == block) {
break;
}
}
+ up(&file->f_sema);
nlmsvc_freegrantargs(block->b_call);
nlm_release_call(block->b_call);
+ nlm_release_file(block->b_file);
kfree(block);
}
kref_put(&block->b_count, nlmsvc_free_block);
}
+static void nlmsvc_act_mark(struct nlm_host *host, struct nlm_file *file)
+{
+ struct nlm_block *block;
+
+ down(&file->f_sema);
+ for (block = file->f_blocks; block != NULL; block = block->b_fnext)
+ block->b_host->h_inuse = 1;
+ up(&file->f_sema);
+}
+
+static void nlmsvc_act_unlock(struct nlm_host *host, struct nlm_file *file)
+{
+ struct nlm_block *block;
+
+restart:
+ down(&file->f_sema);
+ for (block = file->f_blocks; block != NULL; block = block->b_fnext) {
+ if (host != NULL && host != block->b_host)
+ continue;
+ if (!block->b_queued)
+ continue;
+ kref_get(&block->b_count);
+ up(&file->f_sema);
+ nlmsvc_unlink_block(block);
+ nlmsvc_release_block(block);
+ goto restart;
+ }
+ up(&file->f_sema);
+}
+
/*
* Loop over all blocks and perform the action specified.
* (NLM_ACT_CHECK handled by nlmsvc_inspect_file).
*/
-int
+void
nlmsvc_traverse_blocks(struct nlm_host *host, struct nlm_file *file, int action)
{
- struct nlm_block *block, *next;
- /* XXX: Will everything get cleaned up if we don't unlock here? */
-
- down(&file->f_sema);
- for (block = file->f_blocks; block; block = next) {
- next = block->b_fnext;
- if (action == NLM_ACT_MARK)
- block->b_host->h_inuse = 1;
- else if (action == NLM_ACT_UNLOCK) {
- if (host == NULL || host == block->b_host)
- nlmsvc_unlink_block(block);
- }
- }
- up(&file->f_sema);
- return 0;
+ if (action == NLM_ACT_MARK)
+ nlmsvc_act_mark(host, file);
+ else
+ nlmsvc_act_unlock(host, file);
}
/*
/* Lock file against concurrent access */
down(&file->f_sema);
/* Get existing block (in case client is busy-waiting) */
- block = nlmsvc_lookup_block(file, lock, 0);
+ block = nlmsvc_lookup_block(file, lock);
if (block == NULL) {
if (newblock != NULL)
lock = &newblock->b_call->a_args.lock;
(long long)lock->fl.fl_end);
down(&file->f_sema);
- if ((block = nlmsvc_lookup_block(file, lock, 1)) != NULL) {
+ block = nlmsvc_lookup_block(file, lock);
+ up(&file->f_sema);
+ if (block != NULL) {
status = nlmsvc_unlink_block(block);
nlmsvc_release_block(block);
}
- up(&file->f_sema);
return status ? nlm_lck_denied : nlm_granted;
}
dprintk("lockd: grant blocked lock %p\n", block);
- /* First thing is lock the file */
- down(&file->f_sema);
-
/* Unlink block request from list */
nlmsvc_unlink_block(block);
case -EAGAIN:
dprintk("lockd: lock still blocked\n");
nlmsvc_insert_block(block, NLM_NEVER);
- goto out_unlock;
+ return;
default:
printk(KERN_WARNING "lockd: unexpected error %d in %s!\n",
-error, __FUNCTION__);
nlmsvc_insert_block(block, 10 * HZ);
- goto out_unlock;
+ return;
}
callback:
if (nlm_async_call(block->b_call, NLMPROC_GRANTED_MSG,
&nlmsvc_grant_ops) < 0)
nlmsvc_release_block(block);
-out_unlock:
- up(&file->f_sema);
}
/*
if (task->tk_status < 0) {
/* RPC error: Re-insert for retransmission */
timeout = 10 * HZ;
- } else if (block->b_done) {
- /* Block already removed, kill it for real */
- timeout = 0;
} else {
/* Call was successful, now wait for client callback */
timeout = 60 * HZ;
svc_wake_up(block->b_daemon);
}
-void nlmsvc_grant_release(void *data)
+static void nlmsvc_grant_release(void *data)
{
- nlmsvc_release_block(data);
+ struct nlm_rqst *call = data;
+
+ nlmsvc_release_block(call->a_block);
}
static const struct rpc_call_ops nlmsvc_grant_ops = {
return;
file = block->b_file;
- file->f_count++;
- down(&file->f_sema);
if (block) {
if (status == NLM_LCK_DENIED_GRACE_PERIOD) {
/* Try again in a couple of seconds */
nlmsvc_unlink_block(block);
}
}
- up(&file->f_sema);
- nlm_release_file(file);
nlmsvc_release_block(block);
}
break;
if (time_after(block->b_when,jiffies))
break;
- dprintk("nlmsvc_retry_blocked(%p, when=%ld, done=%d)\n",
- block, block->b_when, block->b_done);
+ dprintk("nlmsvc_retry_blocked(%p, when=%ld)\n",
+ block, block->b_when);
kref_get(&block->b_count);
- if (block->b_done)
- nlmsvc_unlink_block(block);
- else
- nlmsvc_grant_blocked(block);
+ nlmsvc_grant_blocked(block);
nlmsvc_release_block(block);
}
git.openpandora.org / pandora-kernel.git / blobdiff