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dlm for 3.10

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This includes a single patch to avoid fully processing a
 posix unlock from close when no posix locks exist on the file.
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Merge tag 'dlm-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm

Pull dlm update from David Teigland:
 "This includes a single patch to avoid fully processing a posix unlock
  from close when no posix locks exist on the file"

* tag 'dlm-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
  dlm: avoid unnecessary posix unlock
This commit is contained in:
Linus Torvalds 2013-04-30 11:29:34 -07:00
commit 8c55f1463c
1 changed files with 15 additions and 3 deletions
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18
fs/dlm/plock.c
View File

@ -247,6 +247,7 @@ int dlm_posix_unlock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
struct dlm_ls *ls;
struct plock_op *op;
int rv;
unsigned char fl_flags = fl->fl_flags;
ls = dlm_find_lockspace_local(lockspace);
if (!ls)
@ -258,9 +259,18 @@ int dlm_posix_unlock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
goto out;
}
if (posix_lock_file_wait(file, fl) < 0)
log_error(ls, "dlm_posix_unlock: vfs unlock error %llx",
(unsigned long long)number);
/* cause the vfs unlock to return ENOENT if lock is not found */
fl->fl_flags |= FL_EXISTS;
rv = posix_lock_file_wait(file, fl);
if (rv == -ENOENT) {
rv = 0;
goto out_free;
}
if (rv < 0) {
log_error(ls, "dlm_posix_unlock: vfs unlock error %d %llx",
rv, (unsigned long long)number);
}
op->info.optype = DLM_PLOCK_OP_UNLOCK;
op->info.pid = fl->fl_pid;
@ -296,9 +306,11 @@ int dlm_posix_unlock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
if (rv == -ENOENT)
rv = 0;
out_free:
kfree(op);
out:
dlm_put_lockspace(ls);
fl->fl_flags = fl_flags;
return rv;
}
EXPORT_SYMBOL_GPL(dlm_posix_unlock);