ocfs2: Implement quota recovery

Implement functions for recovery after a crash. Functions just
read local quota file and sync info to global quota file.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/fs/ocfs2/quota.h b/fs/ocfs2/quota.h
index e2233d51507f..04872b45b990 100644
--- a/fs/ocfs2/quota.h
+++ b/fs/ocfs2/quota.h
@@ -33,6 +33,17 @@ struct ocfs2_dquot {
         s64 dq_originodes;      /* Last globally synced inode usage */
 };
 
+/* Description of one chunk to recover in memory */
+struct ocfs2_recovery_chunk {
+        struct list_head rc_list;       /* List of chunks */
+        int rc_chunk;                   /* Chunk number */
+        unsigned long *rc_bitmap;       /* Bitmap of entries to recover */
+};
+
+struct ocfs2_quota_recovery {
+        struct list_head r_list[MAXQUOTAS];     /* List of chunks to recover */
+};
+
 /* In-memory structure with quota header information */
 struct ocfs2_mem_dqinfo {
         unsigned int dqi_type;          /* Quota type this structure describes */
@@ -49,6 +60,10 @@ struct ocfs2_mem_dqinfo {
         struct buffer_head *dqi_ibh;    /* Buffer with information header */
         struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
         struct delayed_work dqi_sync_work;      /* Work for syncing dquots */
+        struct ocfs2_quota_recovery *dqi_rec;   /* Pointer to recovery
+                                                 * information, in case we
+                                                 * enable quotas on file
+                                                 * needing it */
 };
 
 static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
@@ -67,6 +82,12 @@ extern struct kmem_cache *ocfs2_qf_chunk_cachep;
 
 extern struct qtree_fmt_operations ocfs2_global_ops;
 
+struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
+                                struct ocfs2_super *osb, int slot_num);
+int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
+                                struct ocfs2_quota_recovery *rec,
+                                int slot_num);
+void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec);
 ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
                          size_t len, loff_t off);
 ssize_t ocfs2_quota_write(struct super_block *sb, int type,