WeiWei Wang
2014-Sep-10 12:41 UTC
[Ocfs2-devel] [PATCH 2/7] ocfs2: add two functions of add and remove inode in orphan dir
This commit adds two functions to add inode to orphan dir and remove inode from
orphan dir.
Here the original functions ocfs2_orphan_add and ocfs2_orphan_del are called
respectively.
Signed-off-by: Weiwei Wang <wangww631 at huawei.com>
---
fs/ocfs2/namei.c | 143 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/ocfs2/namei.h | 6 +++
2 files changed, 149 insertions(+)
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 2666dce..a780a63 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -2486,6 +2486,149 @@ leave:
return status;
}
+/* An orphan dir name is an 8 byte value, printed as a hex string */
+#define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
+int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
+ handle_t *handle, struct inode *inode)
+{
+ char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
+ struct inode *orphan_dir_inode = NULL;
+ struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
+ struct buffer_head *di_bh = NULL;
+ int status = 0;
+ bool inode_locked = false;
+
+ status = ocfs2_inode_lock(inode, &di_bh, 1);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out;
+ }
+ inode_locked = true;
+
+ status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
+ OCFS2_I(inode)->ip_blkno,
+ orphan_name,
+ &orphan_insert);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out;
+ }
+
+ status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out;
+ }
+
+ status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
+ &orphan_insert, orphan_dir_inode);
+ if (status) {
+ mlog_errno(status);
+ goto out;
+ }
+
+out:
+ brelse(di_bh);
+
+ if (inode_locked)
+ ocfs2_inode_unlock(inode, 1);
+
+ if (orphan_dir_inode) {
+ ocfs2_inode_unlock(orphan_dir_inode, 1);
+ mutex_unlock(&orphan_dir_inode->i_mutex);
+ iput(orphan_dir_inode);
+ }
+ ocfs2_free_dir_lookup_result(&orphan_insert);
+
+ return status;
+}
+
+int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
+ handle_t *handle, struct inode *inode)
+{
+ struct inode *orphan_dir_inode = NULL;
+ struct buffer_head *orphan_dir_bh = NULL;
+ struct buffer_head *di_bh = NULL;
+ struct ocfs2_dinode *di = NULL;
+ bool orphan_dir_locked = false;
+ int status = 0;
+
+ orphan_dir_inode = ocfs2_get_system_file_inode(osb,
+ ORPHAN_DIR_SYSTEM_INODE,
+ osb->slot_num);
+ if (!orphan_dir_inode) {
+ status = -EEXIST;
+ mlog_errno(status);
+ goto out;
+ }
+
+ mutex_lock(&orphan_dir_inode->i_mutex);
+ status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out;
+ }
+ orphan_dir_locked = true;
+
+ status = ocfs2_journal_access_di(handle,
+ INODE_CACHE(orphan_dir_inode),
+ orphan_dir_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out;
+ }
+
+ status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
+ inode, orphan_dir_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out;
+ }
+
+ status = ocfs2_inode_lock(inode, &di_bh, 1);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out;
+ }
+ di = (struct ocfs2_dinode *) di_bh->b_data;
+
+ /*
+ * We're going to journal the change of i_flags and i_orphaned_slot.
+ * It's safe anyway, though some callers may duplicate the journaling.
+ * Journaling within the func just make the logic look more
+ * straightforward.
+ */
+ status = ocfs2_journal_access_di(handle,
+ INODE_CACHE(inode),
+ di_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out;
+ }
+
+ di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
+ OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
+
+ di->i_orphaned_slot = 0;
+ ocfs2_journal_dirty(handle, di_bh);
+
+ ocfs2_inode_unlock(inode, 1);
+
+out:
+ brelse(orphan_dir_bh);
+
+ if (orphan_dir_inode) {
+ if (orphan_dir_locked)
+ ocfs2_inode_unlock(orphan_dir_inode, 1);
+ mutex_unlock(&orphan_dir_inode->i_mutex);
+ iput(orphan_dir_inode);
+ }
+ return status;
+}
+
int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
struct inode *inode,
struct dentry *dentry)
diff --git a/fs/ocfs2/namei.h b/fs/ocfs2/namei.h
index e5e43d7..c985e35 100644
--- a/fs/ocfs2/namei.h
+++ b/fs/ocfs2/namei.h
@@ -51,6 +51,12 @@ int ocfs2_orphan_del(struct ocfs2_super *osb,
int ocfs2_create_inode_in_orphan(struct inode *dir,
int mode,
struct inode **new_inode);
+int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
+ handle_t *handle,
+ struct inode *inode);
+int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
+ handle_t *handle,
+ struct inode *inode);
int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
struct inode *new_inode,
struct dentry *new_dentry);
--
1.8.4.3