ocfs2: Separate out dlm lock functions.
This is the first in a series of patches to isolate ocfs2 from the
underlying cluster stack. Here we wrap the dlm locking functions with
ocfs2-specific calls. Because ocfs2 always uses the same dlm lock status
callbacks, we can eliminate the callbacks from the filesystem visible
functions.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 15a5167..aea3bef 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -53,6 +53,7 @@
#include "heartbeat.h"
#include "inode.h"
#include "journal.h"
+#include "stackglue.h"
#include "slot_map.h"
#include "super.h"
#include "uptodate.h"
@@ -888,22 +889,21 @@
lockres_or_flags(lockres, OCFS2_LOCK_BUSY);
spin_unlock_irqrestore(&lockres->l_lock, flags);
- status = dlmlock(osb->dlm,
- level,
- &lockres->l_lksb,
- dlm_flags,
- lockres->l_name,
- OCFS2_LOCK_ID_MAX_LEN - 1,
- ocfs2_locking_ast,
- lockres,
- ocfs2_blocking_ast);
+ status = ocfs2_dlm_lock(osb->dlm,
+ level,
+ &lockres->l_lksb,
+ dlm_flags,
+ lockres->l_name,
+ OCFS2_LOCK_ID_MAX_LEN - 1,
+ lockres);
if (status != DLM_NORMAL) {
- ocfs2_log_dlm_error("dlmlock", status, lockres);
+ ocfs2_log_dlm_error("ocfs2_dlm_lock", status, lockres);
ret = -EINVAL;
ocfs2_recover_from_dlm_error(lockres, 1);
}
- mlog(0, "lock %s, successfull return from dlmlock\n", lockres->l_name);
+ mlog(0, "lock %s, successfull return from ocfs2_dlm_lock\n",
+ lockres->l_name);
bail:
mlog_exit(ret);
@@ -1091,29 +1091,27 @@
lockres->l_name, lockres->l_level, level);
/* call dlm_lock to upgrade lock now */
- status = dlmlock(osb->dlm,
- level,
- &lockres->l_lksb,
- lkm_flags,
- lockres->l_name,
- OCFS2_LOCK_ID_MAX_LEN - 1,
- ocfs2_locking_ast,
- lockres,
- ocfs2_blocking_ast);
+ status = ocfs2_dlm_lock(osb->dlm,
+ level,
+ &lockres->l_lksb,
+ lkm_flags,
+ lockres->l_name,
+ OCFS2_LOCK_ID_MAX_LEN - 1,
+ lockres);
if (status != DLM_NORMAL) {
if ((lkm_flags & LKM_NOQUEUE) &&
(status == DLM_NOTQUEUED))
ret = -EAGAIN;
else {
- ocfs2_log_dlm_error("dlmlock", status,
- lockres);
+ ocfs2_log_dlm_error("ocfs2_dlm_lock",
+ status, lockres);
ret = -EINVAL;
}
ocfs2_recover_from_dlm_error(lockres, 1);
goto out;
}
- mlog(0, "lock %s, successfull return from dlmlock\n",
+ mlog(0, "lock %s, successfull return from ocfs2_dlm_lock\n",
lockres->l_name);
/* At this point we've gone inside the dlm and need to
@@ -1503,14 +1501,14 @@
lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_BUSY, 0);
spin_unlock_irqrestore(&lockres->l_lock, flags);
- ret = dlmlock(osb->dlm, level, &lockres->l_lksb, lkm_flags,
- lockres->l_name, OCFS2_LOCK_ID_MAX_LEN - 1,
- ocfs2_locking_ast, lockres, ocfs2_blocking_ast);
+ ret = ocfs2_dlm_lock(osb->dlm, level, &lockres->l_lksb, lkm_flags,
+ lockres->l_name, OCFS2_LOCK_ID_MAX_LEN - 1,
+ lockres);
if (ret != DLM_NORMAL) {
if (trylock && ret == DLM_NOTQUEUED)
ret = -EAGAIN;
else {
- ocfs2_log_dlm_error("dlmlock", ret, lockres);
+ ocfs2_log_dlm_error("ocfs2_dlm_lock", ret, lockres);
ret = -EINVAL;
}
@@ -2699,15 +2697,15 @@
mlog(0, "lock %s\n", lockres->l_name);
- status = dlmunlock(osb->dlm, &lockres->l_lksb, lkm_flags,
- ocfs2_unlock_ast, lockres);
+ status = ocfs2_dlm_unlock(osb->dlm, &lockres->l_lksb, lkm_flags,
+ lockres);
if (status != DLM_NORMAL) {
- ocfs2_log_dlm_error("dlmunlock", status, lockres);
+ ocfs2_log_dlm_error("ocfs2_dlm_unlock", status, lockres);
mlog(ML_ERROR, "lockres flags: %lu\n", lockres->l_flags);
dlm_print_one_lock(lockres->l_lksb.lockid);
BUG();
}
- mlog(0, "lock %s, successfull return from dlmunlock\n",
+ mlog(0, "lock %s, successfull return from ocfs2_dlm_unlock\n",
lockres->l_name);
ocfs2_wait_on_busy_lock(lockres);
@@ -2832,17 +2830,15 @@
if (lvb)
dlm_flags |= LKM_VALBLK;
- status = dlmlock(osb->dlm,
- new_level,
- &lockres->l_lksb,
- dlm_flags,
- lockres->l_name,
- OCFS2_LOCK_ID_MAX_LEN - 1,
- ocfs2_locking_ast,
- lockres,
- ocfs2_blocking_ast);
+ status = ocfs2_dlm_lock(osb->dlm,
+ new_level,
+ &lockres->l_lksb,
+ dlm_flags,
+ lockres->l_name,
+ OCFS2_LOCK_ID_MAX_LEN - 1,
+ lockres);
if (status != DLM_NORMAL) {
- ocfs2_log_dlm_error("dlmlock", status, lockres);
+ ocfs2_log_dlm_error("ocfs2_dlm_lock", status, lockres);
ret = -EINVAL;
ocfs2_recover_from_dlm_error(lockres, 1);
goto bail;
@@ -2854,7 +2850,7 @@
return ret;
}
-/* returns 1 when the caller should unlock and call dlmunlock */
+/* returns 1 when the caller should unlock and call ocfs2_dlm_unlock */
static int ocfs2_prepare_cancel_convert(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres)
{
@@ -2896,18 +2892,17 @@
mlog(0, "lock %s\n", lockres->l_name);
ret = 0;
- status = dlmunlock(osb->dlm,
- &lockres->l_lksb,
- LKM_CANCEL,
- ocfs2_unlock_ast,
- lockres);
+ status = ocfs2_dlm_unlock(osb->dlm,
+ &lockres->l_lksb,
+ LKM_CANCEL,
+ lockres);
if (status != DLM_NORMAL) {
- ocfs2_log_dlm_error("dlmunlock", status, lockres);
+ ocfs2_log_dlm_error("ocfs2_dlm_unlock", status, lockres);
ret = -EINVAL;
ocfs2_recover_from_dlm_error(lockres, 0);
}
- mlog(0, "lock %s return from dlmunlock\n", lockres->l_name);
+ mlog(0, "lock %s return from ocfs2_dlm_unlock\n", lockres->l_name);
mlog_exit(ret);
return ret;
@@ -3211,6 +3206,23 @@
return UNBLOCK_CONTINUE_POST;
}
+static struct ocfs2_locking_protocol lproto = {
+ .lp_lock_ast = ocfs2_locking_ast,
+ .lp_blocking_ast = ocfs2_blocking_ast,
+ .lp_unlock_ast = ocfs2_unlock_ast,
+};
+
+/* This interface isn't the final one, hence the less-than-perfect names */
+void dlmglue_init_stack(void)
+{
+ o2cb_get_stack(&lproto);
+}
+
+void dlmglue_exit_stack(void)
+{
+ o2cb_put_stack();
+}
+
static void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres)
{