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-rw-r--r--fs/ubifs/ubifs.h45
1 files changed, 34 insertions, 11 deletions
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 381d6b207a52..8c40ad3c6721 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -151,6 +151,12 @@
*/
#define WORST_COMPR_FACTOR 2
+/*
+ * How much memory is needed for a buffer where we comress a data node.
+ */
+#define COMPRESSED_DATA_NODE_BUF_SZ \
+ (UBIFS_DATA_NODE_SZ + UBIFS_BLOCK_SIZE * WORST_COMPR_FACTOR)
+
/* Maximum expected tree height for use by bottom_up_buf */
#define BOTTOM_UP_HEIGHT 64
@@ -646,6 +652,7 @@ typedef int (*ubifs_lpt_scan_callback)(struct ubifs_info *c,
* @offs: write-buffer offset in this logical eraseblock
* @avail: number of bytes available in the write-buffer
* @used: number of used bytes in the write-buffer
+ * @size: write-buffer size (in [@c->min_io_size, @c->max_write_size] range)
* @dtype: type of data stored in this LEB (%UBI_LONGTERM, %UBI_SHORTTERM,
* %UBI_UNKNOWN)
* @jhead: journal head the mutex belongs to (note, needed only to shut lockdep
@@ -680,6 +687,7 @@ struct ubifs_wbuf {
int offs;
int avail;
int used;
+ int size;
int dtype;
int jhead;
int (*sync_callback)(struct ubifs_info *c, int lnum, int free, int pad);
@@ -1003,6 +1011,11 @@ struct ubifs_debug_info;
* @bu_mutex: protects the pre-allocated bulk-read buffer and @c->bu
* @bu: pre-allocated bulk-read information
*
+ * @write_reserve_mutex: protects @write_reserve_buf
+ * @write_reserve_buf: on the write path we allocate memory, which might
+ * sometimes be unavailable, in which case we use this
+ * write reserve buffer
+ *
* @log_lebs: number of logical eraseblocks in the log
* @log_bytes: log size in bytes
* @log_last: last LEB of the log
@@ -1024,7 +1037,12 @@ struct ubifs_debug_info;
*
* @min_io_size: minimal input/output unit size
* @min_io_shift: number of bits in @min_io_size minus one
+ * @max_write_size: maximum amount of bytes the underlying flash can write at a
+ * time (MTD write buffer size)
+ * @max_write_shift: number of bits in @max_write_size minus one
* @leb_size: logical eraseblock size in bytes
+ * @leb_start: starting offset of logical eraseblocks within physical
+ * eraseblocks
* @half_leb_size: half LEB size
* @idx_leb_size: how many bytes of an LEB are effectively available when it is
* used to store indexing nodes (@leb_size - @max_idx_node_sz)
@@ -1166,22 +1184,21 @@ struct ubifs_debug_info;
* @rp_uid: reserved pool user ID
* @rp_gid: reserved pool group ID
*
- * @empty: if the UBI device is empty
+ * @empty: %1 if the UBI device is empty
+ * @need_recovery: %1 if the file-system needs recovery
+ * @replaying: %1 during journal replay
+ * @mounting: %1 while mounting
+ * @remounting_rw: %1 while re-mounting from R/O mode to R/W mode
* @replay_tree: temporary tree used during journal replay
* @replay_list: temporary list used during journal replay
* @replay_buds: list of buds to replay
* @cs_sqnum: sequence number of first node in the log (commit start node)
* @replay_sqnum: sequence number of node currently being replayed
- * @need_recovery: file-system needs recovery
- * @replaying: set to %1 during journal replay
* @unclean_leb_list: LEBs to recover when re-mounting R/O mounted FS to R/W
* mode
* @rcvrd_mst_node: recovered master node to write when re-mounting R/O mounted
* FS to R/W mode
* @size_tree: inode size information for recovery
- * @remounting_rw: set while re-mounting from R/O mode to R/W mode
- * @always_chk_crc: always check CRCs (while mounting and remounting to R/W
- * mode)
* @mount_opts: UBIFS-specific mount options
*
* @dbg: debugging-related information
@@ -1250,6 +1267,9 @@ struct ubifs_info {
struct mutex bu_mutex;
struct bu_info bu;
+ struct mutex write_reserve_mutex;
+ void *write_reserve_buf;
+
int log_lebs;
long long log_bytes;
int log_last;
@@ -1271,7 +1291,10 @@ struct ubifs_info {
int min_io_size;
int min_io_shift;
+ int max_write_size;
+ int max_write_shift;
int leb_size;
+ int leb_start;
int half_leb_size;
int idx_leb_size;
int leb_cnt;
@@ -1402,19 +1425,19 @@ struct ubifs_info {
gid_t rp_gid;
/* The below fields are used only during mounting and re-mounting */
- int empty;
+ unsigned int empty:1;
+ unsigned int need_recovery:1;
+ unsigned int replaying:1;
+ unsigned int mounting:1;
+ unsigned int remounting_rw:1;
struct rb_root replay_tree;
struct list_head replay_list;
struct list_head replay_buds;
unsigned long long cs_sqnum;
unsigned long long replay_sqnum;
- int need_recovery;
- int replaying;
struct list_head unclean_leb_list;
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