UBIFS: add no_chk_data_crc mount option

[linux-2.6-omap-h63xx.git] / fs / ubifs / ubifs.h

diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 8513239ea8a026b576eb032cbb051e0ed9575b5d..d6ae3f7b2b05aa069a77476b0f0ec9012a0e1cf2 100644 (file)
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -894,10 +894,12 @@ struct ubifs_orphan {
  * struct ubifs_mount_opts - UBIFS-specific mount options information.
  * @unmount_mode: selected unmount mode (%0 default, %1 normal, %2 fast)
  * @bulk_read: enable bulk-reads
+ * @chk_data_crc: check CRCs when reading data nodes
  */
 struct ubifs_mount_opts {
        unsigned int unmount_mode:2;
        unsigned int bulk_read:2;
+       unsigned int chk_data_crc:2;
 };
 
 /**
@@ -1001,6 +1003,9 @@ struct ubifs_mount_opts {
  * @bulk_read: enable bulk-reads
  * @bulk_read_buf_size: buffer size for bulk-reads
  *
+ * @no_chk_data_crc: do not check CRCs when reading data nodes (except during
+ *                   recovery)
+ *
  * @dirty_pg_cnt: number of dirty pages (not used)
  * @dirty_zn_cnt: number of dirty znodes
  * @clean_zn_cnt: number of clean znodes
@@ -1138,6 +1143,7 @@ struct ubifs_mount_opts {
  * @rcvrd_mst_node: recovered master node to write when mounting ro to rw
  * @size_tree: inode size information for recovery
  * @remounting_rw: set while remounting from ro to rw (sb flags have MS_RDONLY)
+ * @always_chk_crc: always check CRCs (while mounting and remounting rw)
  * @mount_opts: UBIFS-specific mount options
  *
  * @dbg_buf: a buffer of LEB size used for debugging purposes
@@ -1244,6 +1250,8 @@ struct ubifs_info {
        int bulk_read;
        int bulk_read_buf_size;
 
+       int no_chk_data_crc;
+
        atomic_long_t dirty_pg_cnt;
        atomic_long_t dirty_zn_cnt;
        atomic_long_t clean_zn_cnt;
@@ -1374,6 +1382,7 @@ struct ubifs_info {
        struct ubifs_mst_node *rcvrd_mst_node;
        struct rb_root size_tree;
        int remounting_rw;
+       int always_chk_crc;
        struct ubifs_mount_opts mount_opts;
 
 #ifdef CONFIG_UBIFS_FS_DEBUG
@@ -1416,7 +1425,7 @@ int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len,
 int ubifs_write_node(struct ubifs_info *c, void *node, int len, int lnum,
                     int offs, int dtype);
 int ubifs_check_node(const struct ubifs_info *c, const void *buf, int lnum,
-                    int offs, int quiet);
+                    int offs, int quiet, int chk_crc);
 void ubifs_prepare_node(struct ubifs_info *c, void *buf, int len, int pad);
 void ubifs_prep_grp_node(struct ubifs_info *c, void *node, int len, int last);
 int ubifs_io_init(struct ubifs_info *c);