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authorMark Fasheh <mark.fasheh@oracle.com>2007-10-19 02:23:46 +0400
committerMark Fasheh <mark.fasheh@oracle.com>2008-01-26 01:45:57 +0300
commitc934a92d05b549dd2f25db72c5fc3cb9dcf1b611 (patch)
tree57150c87d1d465db28fceaa14c9d5b220c7a3954 /fs/ocfs2/dlmglue.c
parentf1f540688eae66c274ff1c1133b5d9c687b28f58 (diff)
downloadlinux-c934a92d05b549dd2f25db72c5fc3cb9dcf1b611.tar.xz
ocfs2: Remove data locks
The meta lock now covers both meta data and data, so this just removes the now-redundant data lock. Combining locks saves us a round of lock mastery per inode and one less lock to ping between nodes during read/write. We don't lose much - since meta locks were always held before a data lock (and at the same level) ordered writeout mode (the default) ensured that flushing for the meta data lock also pushed out data anyways. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/dlmglue.c')
-rw-r--r--fs/ocfs2/dlmglue.c104
1 files changed, 0 insertions, 104 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 7e36abea8f40..ecf58c6e2fa3 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -232,12 +232,6 @@ static struct ocfs2_lock_res_ops ocfs2_inode_meta_lops = {
.flags = LOCK_TYPE_REQUIRES_REFRESH|LOCK_TYPE_USES_LVB,
};
-static struct ocfs2_lock_res_ops ocfs2_inode_data_lops = {
- .get_osb = ocfs2_get_inode_osb,
- .downconvert_worker = ocfs2_data_convert_worker,
- .flags = 0,
-};
-
static struct ocfs2_lock_res_ops ocfs2_super_lops = {
.flags = LOCK_TYPE_REQUIRES_REFRESH,
};
@@ -261,7 +255,6 @@ static struct ocfs2_lock_res_ops ocfs2_inode_open_lops = {
static inline int ocfs2_is_inode_lock(struct ocfs2_lock_res *lockres)
{
return lockres->l_type == OCFS2_LOCK_TYPE_META ||
- lockres->l_type == OCFS2_LOCK_TYPE_DATA ||
lockres->l_type == OCFS2_LOCK_TYPE_RW ||
lockres->l_type == OCFS2_LOCK_TYPE_OPEN;
}
@@ -405,9 +398,6 @@ void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
case OCFS2_LOCK_TYPE_META:
ops = &ocfs2_inode_meta_lops;
break;
- case OCFS2_LOCK_TYPE_DATA:
- ops = &ocfs2_inode_data_lops;
- break;
case OCFS2_LOCK_TYPE_OPEN:
ops = &ocfs2_inode_open_lops;
break;
@@ -1154,12 +1144,6 @@ int ocfs2_create_new_inode_locks(struct inode *inode)
goto bail;
}
- ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_data_lockres, 1, 1);
- if (ret) {
- mlog_errno(ret);
- goto bail;
- }
-
ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_open_lockres, 0, 0);
if (ret) {
mlog_errno(ret);
@@ -1312,67 +1296,6 @@ out:
mlog_exit_void();
}
-int ocfs2_data_lock_full(struct inode *inode,
- int write,
- int arg_flags)
-{
- int status = 0, level;
- struct ocfs2_lock_res *lockres;
- struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-
- BUG_ON(!inode);
-
- mlog_entry_void();
-
- mlog(0, "inode %llu take %s DATA lock\n",
- (unsigned long long)OCFS2_I(inode)->ip_blkno,
- write ? "EXMODE" : "PRMODE");
-
- /* We'll allow faking a readonly data lock for
- * rodevices. */
- if (ocfs2_is_hard_readonly(OCFS2_SB(inode->i_sb))) {
- if (write) {
- status = -EROFS;
- mlog_errno(status);
- }
- goto out;
- }
-
- if (ocfs2_mount_local(osb))
- goto out;
-
- lockres = &OCFS2_I(inode)->ip_data_lockres;
-
- level = write ? LKM_EXMODE : LKM_PRMODE;
-
- status = ocfs2_cluster_lock(OCFS2_SB(inode->i_sb), lockres, level,
- 0, arg_flags);
- if (status < 0 && status != -EAGAIN)
- mlog_errno(status);
-
-out:
- mlog_exit(status);
- return status;
-}
-
-/* see ocfs2_meta_lock_with_page() */
-int ocfs2_data_lock_with_page(struct inode *inode,
- int write,
- struct page *page)
-{
- int ret;
-
- ret = ocfs2_data_lock_full(inode, write, OCFS2_LOCK_NONBLOCK);
- if (ret == -EAGAIN) {
- unlock_page(page);
- if (ocfs2_data_lock(inode, write) == 0)
- ocfs2_data_unlock(inode, write);
- ret = AOP_TRUNCATED_PAGE;
- }
-
- return ret;
-}
-
static void ocfs2_downconvert_on_unlock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres)
{
@@ -1404,26 +1327,6 @@ static void ocfs2_downconvert_on_unlock(struct ocfs2_super *osb,
mlog_exit_void();
}
-void ocfs2_data_unlock(struct inode *inode,
- int write)
-{
- int level = write ? LKM_EXMODE : LKM_PRMODE;
- struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_data_lockres;
- struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-
- mlog_entry_void();
-
- mlog(0, "inode %llu drop %s DATA lock\n",
- (unsigned long long)OCFS2_I(inode)->ip_blkno,
- write ? "EXMODE" : "PRMODE");
-
- if (!ocfs2_is_hard_readonly(OCFS2_SB(inode->i_sb)) &&
- !ocfs2_mount_local(osb))
- ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres, level);
-
- mlog_exit_void();
-}
-
#define OCFS2_SEC_BITS 34
#define OCFS2_SEC_SHIFT (64 - 34)
#define OCFS2_NSEC_MASK ((1ULL << OCFS2_SEC_SHIFT) - 1)
@@ -2592,13 +2495,6 @@ int ocfs2_drop_inode_locks(struct inode *inode)
status = err;
err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb),
- &OCFS2_I(inode)->ip_data_lockres);
- if (err < 0)
- mlog_errno(err);
- if (err < 0 && !status)
- status = err;
-
- err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb),
&OCFS2_I(inode)->ip_meta_lockres);
if (err < 0)
mlog_errno(err);