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lockd: simplify nlmsvc_grant_blocked
Reorganize nlmsvc_grant_blocked() to make full use of posix_lock_file(). Note that there's no need for separate calls to posix_test_lock(), posix_locks_deadlock(), or posix_block_lock(). Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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parent
15dadef946
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5de0e5024a
1 changed files with 6 additions and 11 deletions
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@ -519,7 +519,6 @@ nlmsvc_grant_blocked(struct nlm_block *block)
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{
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struct nlm_file *file = block->b_file;
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struct nlm_lock *lock = &block->b_call.a_args.lock;
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struct file_lock *conflock;
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int error;
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dprintk("lockd: grant blocked lock %p\n", block);
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@ -539,19 +538,15 @@ nlmsvc_grant_blocked(struct nlm_block *block)
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}
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/* Try the lock operation again */
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if ((conflock = posix_test_lock(file->f_file, &lock->fl)) != NULL) {
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/* Bummer, we blocked again */
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error = posix_lock_file(file->f_file, &lock->fl);
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switch (error) {
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case 0:
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break;
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case -EAGAIN:
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dprintk("lockd: lock still blocked\n");
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nlmsvc_insert_block(block, NLM_NEVER);
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posix_block_lock(conflock, &lock->fl);
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goto out_unlock;
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}
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/* Alright, no conflicting lock. Now lock it for real. If the
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* following yields an error, this is most probably due to low
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* memory. Retry the lock in a few seconds.
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*/
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if ((error = posix_lock_file(file->f_file, &lock->fl)) < 0) {
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default:
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printk(KERN_WARNING "lockd: unexpected error %d in %s!\n",
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-error, __FUNCTION__);
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nlmsvc_insert_block(block, 10 * HZ);
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