UBIFS: always set i_generation to 0

[safe/jmp/linux-2.6] / fs / ubifs / ubifs.h

diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index e4f89f2..f2dd749 100644 (file)
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -322,6 +322,8 @@ struct ubifs_gced_idx_leb {
  * struct ubifs_inode - UBIFS in-memory inode description.
  * @vfs_inode: VFS inode description object
  * @creat_sqnum: sequence number at time of creation
+ * @del_cmtno: commit number corresponding to the time the inode was deleted,
+ *             protected by @c->commit_sem;
  * @xattr_size: summarized size of all extended attributes in bytes
  * @xattr_cnt: count of extended attributes this inode has
  * @xattr_names: sum of lengths of all extended attribute names belonging to
@@ -373,6 +375,7 @@ struct ubifs_gced_idx_leb {
 struct ubifs_inode {
        struct inode vfs_inode;
        unsigned long long creat_sqnum;
+       unsigned long long del_cmtno;
        unsigned int xattr_size;
        unsigned int xattr_cnt;
        unsigned int xattr_names;
@@ -779,7 +782,7 @@ struct ubifs_compressor {
 /**
  * struct ubifs_budget_req - budget requirements of an operation.
  *
- * @fast: non-zero if the budgeting should try to aquire budget quickly and
+ * @fast: non-zero if the budgeting should try to acquire budget quickly and
  *        should not try to call write-back
  * @recalculate: non-zero if @idx_growth, @data_growth, and @dd_growth fields
  *               have to be re-calculated
@@ -805,21 +808,31 @@ struct ubifs_compressor {
  * An inode may contain 4KiB of data at max., thus the widths of @new_ino_d
  * is 13 bits, and @dirtied_ino_d - 15, because up to 4 inodes may be made
  * dirty by the re-name operation.
+ *
+ * Note, UBIFS aligns node lengths to 8-bytes boundary, so the requester has to
+ * make sure the amount of inode data which contribute to @new_ino_d and
+ * @dirtied_ino_d fields are aligned.
  */
 struct ubifs_budget_req {
        unsigned int fast:1;
        unsigned int recalculate:1;
+#ifndef UBIFS_DEBUG
        unsigned int new_page:1;
        unsigned int dirtied_page:1;
        unsigned int new_dent:1;
        unsigned int mod_dent:1;
        unsigned int new_ino:1;
        unsigned int new_ino_d:13;
-#ifndef UBIFS_DEBUG
        unsigned int dirtied_ino:4;
        unsigned int dirtied_ino_d:15;
 #else
        /* Not bit-fields to check for overflows */
+       unsigned int new_page;
+       unsigned int dirtied_page;
+       unsigned int new_dent;
+       unsigned int mod_dent;
+       unsigned int new_ino;
+       unsigned int new_ino_d;
        unsigned int dirtied_ino;
        unsigned int dirtied_ino_d;
 #endif
@@ -860,13 +873,13 @@ struct ubifs_mount_opts {
  * struct ubifs_info - UBIFS file-system description data structure
  * (per-superblock).
  * @vfs_sb: VFS @struct super_block object
- * @bdi: backing device info object to make VFS happy and disable readahead
+ * @bdi: backing device info object to make VFS happy and disable read-ahead
  *
  * @highest_inum: highest used inode number
- * @vfs_gen: VFS inode generation counter
  * @max_sqnum: current global sequence number
- * @cmt_no: commit number (last successfully completed commit)
- * @cnt_lock: protects @highest_inum, @vfs_gen, and @max_sqnum counters
+ * @cmt_no: commit number of the last successfully completed commit, protected
+ *          by @commit_sem
+ * @cnt_lock: protects @highest_inum and @max_sqnum counters
  * @fmt_version: UBIFS on-flash format version
  * @uuid: UUID from super block
  *
@@ -1103,7 +1116,6 @@ struct ubifs_info {
        struct backing_dev_info bdi;
 
        ino_t highest_inum;
-       unsigned int vfs_gen;
        unsigned long long max_sqnum;
        unsigned long long cmt_no;
        spinlock_t cnt_lock;
@@ -1346,6 +1358,7 @@ extern struct backing_dev_info ubifs_backing_dev_info;
 extern struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
 
 /* io.c */
+void ubifs_ro_mode(struct ubifs_info *c, int err);
 int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len);
 int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs,
                           int dtype);
@@ -1399,8 +1412,8 @@ int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir,
                     int deletion, int xent);
 int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
                         const union ubifs_key *key, const void *buf, int len);
-int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode,
-                         int last_reference);
+int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode);
+int ubifs_jnl_delete_inode(struct ubifs_info *c, const struct inode *inode);
 int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
                     const struct dentry *old_dentry,
                     const struct inode *new_dir,