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Diffstat (limited to 'fs/ocfs2/dlmglue.c')
-rw-r--r--fs/ocfs2/dlmglue.c119
1 files changed, 117 insertions, 2 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 31d519a6dbd2..ca4f0e0e7587 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -225,11 +225,17 @@ static struct ocfs2_lock_res_ops ocfs2_dentry_lops = {
.flags = 0,
};
+static struct ocfs2_lock_res_ops ocfs2_inode_open_lops = {
+ .get_osb = ocfs2_get_inode_osb,
+ .flags = 0,
+};
+
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_RW ||
+ lockres->l_type == OCFS2_LOCK_TYPE_OPEN;
}
static inline struct inode *ocfs2_lock_res_inode(struct ocfs2_lock_res *lockres)
@@ -373,6 +379,9 @@ void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
case OCFS2_LOCK_TYPE_DATA:
ops = &ocfs2_inode_data_lops;
break;
+ case OCFS2_LOCK_TYPE_OPEN:
+ ops = &ocfs2_inode_open_lops;
+ break;
default:
mlog_bug_on_msg(1, "type: %d\n", type);
ops = NULL; /* thanks, gcc */
@@ -1129,6 +1138,12 @@ int ocfs2_create_new_inode_locks(struct inode *inode)
goto bail;
}
+ ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_open_lockres, 0, 0);
+ if (ret) {
+ mlog_errno(ret);
+ goto bail;
+ }
+
bail:
mlog_exit(ret);
return ret;
@@ -1182,6 +1197,99 @@ void ocfs2_rw_unlock(struct inode *inode, int write)
mlog_exit_void();
}
+/*
+ * ocfs2_open_lock always get PR mode lock.
+ */
+int ocfs2_open_lock(struct inode *inode)
+{
+ int status = 0;
+ 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 PRMODE open lock\n",
+ (unsigned long long)OCFS2_I(inode)->ip_blkno);
+
+ if (ocfs2_mount_local(osb))
+ goto out;
+
+ lockres = &OCFS2_I(inode)->ip_open_lockres;
+
+ status = ocfs2_cluster_lock(OCFS2_SB(inode->i_sb), lockres,
+ LKM_PRMODE, 0, 0);
+ if (status < 0)
+ mlog_errno(status);
+
+out:
+ mlog_exit(status);
+ return status;
+}
+
+int ocfs2_try_open_lock(struct inode *inode, int write)
+{
+ 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 try to take %s open lock\n",
+ (unsigned long long)OCFS2_I(inode)->ip_blkno,
+ write ? "EXMODE" : "PRMODE");
+
+ if (ocfs2_mount_local(osb))
+ goto out;
+
+ lockres = &OCFS2_I(inode)->ip_open_lockres;
+
+ level = write ? LKM_EXMODE : LKM_PRMODE;
+
+ /*
+ * The file system may already holding a PRMODE/EXMODE open lock.
+ * Since we pass LKM_NOQUEUE, the request won't block waiting on
+ * other nodes and the -EAGAIN will indicate to the caller that
+ * this inode is still in use.
+ */
+ status = ocfs2_cluster_lock(OCFS2_SB(inode->i_sb), lockres,
+ level, LKM_NOQUEUE, 0);
+
+out:
+ mlog_exit(status);
+ return status;
+}
+
+/*
+ * ocfs2_open_unlock unlock PR and EX mode open locks.
+ */
+void ocfs2_open_unlock(struct inode *inode)
+{
+ struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_open_lockres;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+ mlog_entry_void();
+
+ mlog(0, "inode %llu drop open lock\n",
+ (unsigned long long)OCFS2_I(inode)->ip_blkno);
+
+ if (ocfs2_mount_local(osb))
+ goto out;
+
+ if(lockres->l_ro_holders)
+ ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres,
+ LKM_PRMODE);
+ if(lockres->l_ex_holders)
+ ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres,
+ LKM_EXMODE);
+
+out:
+ mlog_exit_void();
+}
+
int ocfs2_data_lock_full(struct inode *inode,
int write,
int arg_flags)
@@ -2455,13 +2563,20 @@ int ocfs2_drop_inode_locks(struct inode *inode)
* ocfs2_clear_inode has done it for us. */
err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb),
- &OCFS2_I(inode)->ip_data_lockres);
+ &OCFS2_I(inode)->ip_open_lockres);
if (err < 0)
mlog_errno(err);
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);