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-rw-r--r--fs/ubifs/ubifs.h231
1 files changed, 142 insertions, 89 deletions
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 381d6b207a5..c1f71fe17cc 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -42,16 +42,24 @@
#define UBIFS_VERSION 1
/* Normal UBIFS messages */
-#define ubifs_msg(fmt, ...) \
- printk(KERN_NOTICE "UBIFS: " fmt "\n", ##__VA_ARGS__)
+#define ubifs_msg(fmt, ...) pr_notice("UBIFS: " fmt "\n", ##__VA_ARGS__)
/* UBIFS error messages */
-#define ubifs_err(fmt, ...) \
- printk(KERN_ERR "UBIFS error (pid %d): %s: " fmt "\n", current->pid, \
+#define ubifs_err(fmt, ...) \
+ pr_err("UBIFS error (pid %d): %s: " fmt "\n", current->pid, \
__func__, ##__VA_ARGS__)
/* UBIFS warning messages */
-#define ubifs_warn(fmt, ...) \
- printk(KERN_WARNING "UBIFS warning (pid %d): %s: " fmt "\n", \
- current->pid, __func__, ##__VA_ARGS__)
+#define ubifs_warn(fmt, ...) \
+ pr_warn("UBIFS warning (pid %d): %s: " fmt "\n", \
+ current->pid, __func__, ##__VA_ARGS__)
+/*
+ * A variant of 'ubifs_err()' which takes the UBIFS file-sytem description
+ * object as an argument.
+ */
+#define ubifs_errc(c, fmt, ...) \
+ do { \
+ if (!(c)->probing) \
+ ubifs_err(fmt, ##__VA_ARGS__); \
+ } while (0)
/* UBIFS file system VFS magic number */
#define UBIFS_SUPER_MAGIC 0x24051905
@@ -84,9 +92,6 @@
#define INUM_WARN_WATERMARK 0xFFF00000
#define INUM_WATERMARK 0xFFFFFF00
-/* Largest key size supported in this implementation */
-#define CUR_MAX_KEY_LEN UBIFS_SK_LEN
-
/* Maximum number of entries in each LPT (LEB category) heap */
#define LPT_HEAP_SZ 256
@@ -151,6 +156,12 @@
*/
#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
@@ -224,14 +235,14 @@ enum {
* LPT cnode flag bits.
*
* DIRTY_CNODE: cnode is dirty
- * COW_CNODE: cnode is being committed and must be copied before writing
* OBSOLETE_CNODE: cnode is being committed and has been copied (or deleted),
- * so it can (and must) be freed when the commit is finished
+ * so it can (and must) be freed when the commit is finished
+ * COW_CNODE: cnode is being committed and must be copied before writing
*/
enum {
DIRTY_CNODE = 0,
- COW_CNODE = 1,
- OBSOLETE_CNODE = 2,
+ OBSOLETE_CNODE = 1,
+ COW_CNODE = 2,
};
/*
@@ -271,10 +282,10 @@ struct ubifs_old_idx {
/* The below union makes it easier to deal with keys */
union ubifs_key {
- uint8_t u8[CUR_MAX_KEY_LEN];
- uint32_t u32[CUR_MAX_KEY_LEN/4];
- uint64_t u64[CUR_MAX_KEY_LEN/8];
- __le32 j32[CUR_MAX_KEY_LEN/4];
+ uint8_t u8[UBIFS_SK_LEN];
+ uint32_t u32[UBIFS_SK_LEN/4];
+ uint64_t u64[UBIFS_SK_LEN/8];
+ __le32 j32[UBIFS_SK_LEN/4];
};
/**
@@ -383,9 +394,9 @@ struct ubifs_gced_idx_leb {
* The @ui_size is a "shadow" variable for @inode->i_size and UBIFS uses
* @ui_size instead of @inode->i_size. The reason for this is that UBIFS cannot
* make sure @inode->i_size is always changed under @ui_mutex, because it
- * cannot call 'truncate_setsize()' with @ui_mutex locked, because it would deadlock
- * with 'ubifs_writepage()' (see file.c). All the other inode fields are
- * changed under @ui_mutex, so they do not need "shadow" fields. Note, one
+ * cannot call 'truncate_setsize()' with @ui_mutex locked, because it would
+ * deadlock with 'ubifs_writepage()' (see file.c). All the other inode fields
+ * are changed under @ui_mutex, so they do not need "shadow" fields. Note, one
* could consider to rework locking and base it on "shadow" fields.
*/
struct ubifs_inode {
@@ -646,8 +657,7 @@ 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
- * @dtype: type of data stored in this LEB (%UBI_LONGTERM, %UBI_SHORTTERM,
- * %UBI_UNKNOWN)
+ * @size: write-buffer size (in [@c->min_io_size, @c->max_write_size] range)
* @jhead: journal head the mutex belongs to (note, needed only to shut lockdep
* up by 'mutex_lock_nested()).
* @sync_callback: write-buffer synchronization callback
@@ -680,7 +690,7 @@ struct ubifs_wbuf {
int offs;
int avail;
int used;
- int dtype;
+ int size;
int jhead;
int (*sync_callback)(struct ubifs_info *c, int lnum, int free, int pad);
struct mutex io_mutex;
@@ -714,12 +724,14 @@ struct ubifs_bud {
* struct ubifs_jhead - journal head.
* @wbuf: head's write-buffer
* @buds_list: list of bud LEBs belonging to this journal head
+ * @grouped: non-zero if UBIFS groups nodes when writing to this journal head
*
* Note, the @buds list is protected by the @c->buds_lock.
*/
struct ubifs_jhead {
struct ubifs_wbuf wbuf;
struct list_head buds_list;
+ unsigned int grouped:1;
};
/**
@@ -755,6 +767,9 @@ struct ubifs_zbranch {
* @offs: offset of the corresponding indexing node
* @len: length of the corresponding indexing node
* @zbranch: array of znode branches (@c->fanout elements)
+ *
+ * Note! The @lnum, @offs, and @len fields are not really needed - we have them
+ * only for internal consistency check. They could be removed to save some RAM.
*/
struct ubifs_znode {
struct ubifs_znode *parent;
@@ -765,9 +780,9 @@ struct ubifs_znode {
int child_cnt;
int iip;
int alt;
-#ifdef CONFIG_UBIFS_FS_DEBUG
- int lnum, offs, len;
-#endif
+ int lnum;
+ int offs;
+ int len;
struct ubifs_zbranch zbranch[];
};
@@ -898,6 +913,8 @@ struct ubifs_budget_req {
* @dnext: next orphan to delete
* @inum: inode number
* @new: %1 => added since the last commit, otherwise %0
+ * @cmt: %1 => commit pending, otherwise %0
+ * @del: %1 => delete pending, otherwise %0
*/
struct ubifs_orphan {
struct rb_node rb;
@@ -906,7 +923,9 @@ struct ubifs_orphan {
struct ubifs_orphan *cnext;
struct ubifs_orphan *dnext;
ino_t inum;
- int new;
+ unsigned new:1;
+ unsigned cmt:1;
+ unsigned del:1;
};
/**
@@ -929,6 +948,40 @@ struct ubifs_mount_opts {
unsigned int compr_type:2;
};
+/**
+ * struct ubifs_budg_info - UBIFS budgeting information.
+ * @idx_growth: amount of bytes budgeted for index growth
+ * @data_growth: amount of bytes budgeted for cached data
+ * @dd_growth: amount of bytes budgeted for cached data that will make
+ * other data dirty
+ * @uncommitted_idx: amount of bytes were budgeted for growth of the index, but
+ * which still have to be taken into account because the index
+ * has not been committed so far
+ * @old_idx_sz: size of index on flash
+ * @min_idx_lebs: minimum number of LEBs required for the index
+ * @nospace: non-zero if the file-system does not have flash space (used as
+ * optimization)
+ * @nospace_rp: the same as @nospace, but additionally means that even reserved
+ * pool is full
+ * @page_budget: budget for a page (constant, nenver changed after mount)
+ * @inode_budget: budget for an inode (constant, nenver changed after mount)
+ * @dent_budget: budget for a directory entry (constant, nenver changed after
+ * mount)
+ */
+struct ubifs_budg_info {
+ long long idx_growth;
+ long long data_growth;
+ long long dd_growth;
+ long long uncommitted_idx;
+ unsigned long long old_idx_sz;
+ int min_idx_lebs;
+ unsigned int nospace:1;
+ unsigned int nospace_rp:1;
+ int page_budget;
+ int inode_budget;
+ int dent_budget;
+};
+
struct ubifs_debug_info;
/**
@@ -972,6 +1025,7 @@ struct ubifs_debug_info;
* @cmt_wq: wait queue to sleep on if the log is full and a commit is running
*
* @big_lpt: flag that LPT is too big to write whole during commit
+ * @space_fixup: flag indicating that free space in LEBs needs to be cleaned up
* @no_chk_data_crc: do not check CRCs when reading data nodes (except during
* recovery)
* @bulk_read: enable bulk-reads
@@ -1003,6 +1057,11 @@ 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 +1083,12 @@ 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)
@@ -1039,32 +1103,14 @@ struct ubifs_debug_info;
* @dirty_zn_cnt: number of dirty znodes
* @clean_zn_cnt: number of clean znodes
*
- * @budg_idx_growth: amount of bytes budgeted for index growth
- * @budg_data_growth: amount of bytes budgeted for cached data
- * @budg_dd_growth: amount of bytes budgeted for cached data that will make
- * other data dirty
- * @budg_uncommitted_idx: amount of bytes were budgeted for growth of the index,
- * but which still have to be taken into account because
- * the index has not been committed so far
- * @space_lock: protects @budg_idx_growth, @budg_data_growth, @budg_dd_growth,
- * @budg_uncommited_idx, @min_idx_lebs, @old_idx_sz, @lst,
- * @nospace, and @nospace_rp;
- * @min_idx_lebs: minimum number of LEBs required for the index
- * @old_idx_sz: size of index on flash
+ * @space_lock: protects @bi and @lst
+ * @lst: lprops statistics
+ * @bi: budgeting information
* @calc_idx_sz: temporary variable which is used to calculate new index size
* (contains accurate new index size at end of TNC commit start)
- * @lst: lprops statistics
- * @nospace: non-zero if the file-system does not have flash space (used as
- * optimization)
- * @nospace_rp: the same as @nospace, but additionally means that even reserved
- * pool is full
- *
- * @page_budget: budget for a page
- * @inode_budget: budget for an inode
- * @dent_budget: budget for a directory entry
*
* @ref_node_alsz: size of the LEB reference node aligned to the min. flash
- * I/O unit
+ * I/O unit
* @mst_node_alsz: master node aligned size
* @min_idx_node_sz: minimum indexing node aligned on 8-bytes boundary
* @max_idx_node_sz: maximum indexing node aligned on 8-bytes boundary
@@ -1150,6 +1196,8 @@ struct ubifs_debug_info;
* @freeable_list: list of freeable non-index LEBs (free + dirty == @leb_size)
* @frdi_idx_list: list of freeable index LEBs (free + dirty == @leb_size)
* @freeable_cnt: number of freeable LEBs in @freeable_list
+ * @in_a_category_cnt: count of lprops which are in a certain category, which
+ * basically meants that they were loaded from the flash
*
* @ltab_lnum: LEB number of LPT's own lprops table
* @ltab_offs: offset of LPT's own lprops table
@@ -1166,22 +1214,21 @@ struct ubifs_debug_info;
* @rp_uid: reserved pool user ID
* @rp_gid: reserved pool group ID
*
- * @empty: if the UBI device is empty
- * @replay_tree: temporary tree used during journal replay
+ * @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
+ * @probing: %1 while attempting to mount if MS_SILENT mount flag is set
+ * @remounting_rw: %1 while re-mounting from R/O mode to R/W mode
* @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
@@ -1221,6 +1268,7 @@ struct ubifs_info {
wait_queue_head_t cmt_wq;
unsigned int big_lpt:1;
+ unsigned int space_fixup:1;
unsigned int no_chk_data_crc:1;
unsigned int bulk_read:1;
unsigned int default_compr:2;
@@ -1250,6 +1298,9 @@ 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 +1322,10 @@ 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;
@@ -1285,21 +1339,10 @@ struct ubifs_info {
atomic_long_t dirty_zn_cnt;
atomic_long_t clean_zn_cnt;
- long long budg_idx_growth;
- long long budg_data_growth;
- long long budg_dd_growth;
- long long budg_uncommitted_idx;
spinlock_t space_lock;
- int min_idx_lebs;
- unsigned long long old_idx_sz;
- unsigned long long calc_idx_sz;
struct ubifs_lp_stats lst;
- unsigned int nospace:1;
- unsigned int nospace_rp:1;
-
- int page_budget;
- int inode_budget;
- int dent_budget;
+ struct ubifs_budg_info bi;
+ unsigned long long calc_idx_sz;
int ref_node_alsz;
int mst_node_alsz;
@@ -1385,6 +1428,7 @@ struct ubifs_info {
struct list_head freeable_list;
struct list_head frdi_idx_list;
int freeable_cnt;
+ int in_a_category_cnt;
int ltab_lnum;
int ltab_offs;
@@ -1398,28 +1442,26 @@ struct ubifs_info {
long long rp_size;
long long report_rp_size;
- uid_t rp_uid;
- gid_t rp_gid;
+ kuid_t rp_uid;
+ kgid_t rp_gid;
/* The below fields are used only during mounting and re-mounting */
- int empty;
- struct rb_root replay_tree;
+ unsigned int empty:1;
+ unsigned int need_recovery:1;
+ unsigned int replaying:1;
+ unsigned int mounting:1;
+ unsigned int remounting_rw:1;
+ unsigned int probing:1;
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
struct ubifs_debug_info *dbg;
-#endif
};
extern struct list_head ubifs_infos;
@@ -1438,16 +1480,23 @@ extern struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
/* io.c */
void ubifs_ro_mode(struct ubifs_info *c, int err);
+int ubifs_leb_read(const struct ubifs_info *c, int lnum, void *buf, int offs,
+ int len, int even_ebadmsg);
+int ubifs_leb_write(struct ubifs_info *c, int lnum, const void *buf, int offs,
+ int len);
+int ubifs_leb_change(struct ubifs_info *c, int lnum, const void *buf, int len);
+int ubifs_leb_unmap(struct ubifs_info *c, int lnum);
+int ubifs_leb_map(struct ubifs_info *c, int lnum);
+int ubifs_is_mapped(const struct ubifs_info *c, int lnum);
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);
+int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs);
int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf);
int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len,
int lnum, int offs);
int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len,
int lnum, int offs);
int ubifs_write_node(struct ubifs_info *c, void *node, int len, int lnum,
- int offs, int dtype);
+ int offs);
int ubifs_check_node(const struct ubifs_info *c, const void *buf, int lnum,
int offs, int quiet, int must_chk_crc);
void ubifs_prepare_node(struct ubifs_info *c, void *buf, int len, int pad);
@@ -1586,7 +1635,10 @@ int ubifs_tnc_start_commit(struct ubifs_info *c, struct ubifs_zbranch *zroot);
int ubifs_tnc_end_commit(struct ubifs_info *c);
/* shrinker.c */
-int ubifs_shrinker(struct shrinker *shrink, int nr_to_scan, gfp_t gfp_mask);
+unsigned long ubifs_shrink_scan(struct shrinker *shrink,
+ struct shrink_control *sc);
+unsigned long ubifs_shrink_count(struct shrinker *shrink,
+ struct shrink_control *sc);
/* commit.c */
int ubifs_bg_thread(void *info);
@@ -1605,6 +1657,7 @@ int ubifs_write_master(struct ubifs_info *c);
int ubifs_read_superblock(struct ubifs_info *c);
struct ubifs_sb_node *ubifs_read_sb_node(struct ubifs_info *c);
int ubifs_write_sb_node(struct ubifs_info *c, struct ubifs_sb_node *sup);
+int ubifs_fixup_free_space(struct ubifs_info *c);
/* replay.c */
int ubifs_validate_entry(struct ubifs_info *c,
@@ -1689,12 +1742,12 @@ const struct ubifs_lprops *ubifs_fast_find_frdi_idx(struct ubifs_info *c);
int ubifs_calc_dark(const struct ubifs_info *c, int spc);
/* file.c */
-int ubifs_fsync(struct file *file, int datasync);
+int ubifs_fsync(struct file *file, loff_t start, loff_t end, int datasync);
int ubifs_setattr(struct dentry *dentry, struct iattr *attr);
/* dir.c */
struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir,
- int mode);
+ umode_t mode);
int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat);
@@ -1713,11 +1766,11 @@ struct inode *ubifs_iget(struct super_block *sb, unsigned long inum);
int ubifs_recover_master_node(struct ubifs_info *c);
int ubifs_write_rcvrd_mst_node(struct ubifs_info *c);
struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum,
- int offs, void *sbuf, int grouped);
+ int offs, void *sbuf, int jhead);
struct ubifs_scan_leb *ubifs_recover_log_leb(struct ubifs_info *c, int lnum,
int offs, void *sbuf);
-int ubifs_recover_inl_heads(const struct ubifs_info *c, void *sbuf);
-int ubifs_clean_lebs(const struct ubifs_info *c, void *sbuf);
+int ubifs_recover_inl_heads(struct ubifs_info *c, void *sbuf);
+int ubifs_clean_lebs(struct ubifs_info *c, void *sbuf);
int ubifs_rcvry_gc_commit(struct ubifs_info *c);
int ubifs_recover_size_accum(struct ubifs_info *c, union ubifs_key *key,
int deletion, loff_t new_size);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-15 23:18:37 +0000