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authorIngo Molnar <mingo@elte.hu>2008-09-10 08:35:40 +0200
committerIngo Molnar <mingo@elte.hu>2008-09-10 08:35:40 +0200
commit429b022af41108f6942d72547592b1d30e9a51f0 (patch)
tree7d68355529718018cdad1241285816c6f64620b2 /fs/ubifs/ubifs.h
parentrcuclassic: fix compiler warning (diff)
parentLinux 2.6.27-rc6 (diff)
downloadlinux-429b022af41108f6942d72547592b1d30e9a51f0.tar.xz
linux-429b022af41108f6942d72547592b1d30e9a51f0.zip
Merge commit 'v2.6.27-rc6' into core/rcu
Diffstat (limited to 'fs/ubifs/ubifs.h')
-rw-r--r--fs/ubifs/ubifs.h47
1 files changed, 33 insertions, 14 deletions
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index e4f89f271827..17c620b93eec 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -20,8 +20,6 @@
* Adrian Hunter
*/
-/* Implementation version 0.7 */
-
#ifndef __UBIFS_H__
#define __UBIFS_H__
@@ -322,6 +320,8 @@ 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 +373,7 @@ 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 +780,7 @@ 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 +806,31 @@ 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 +871,13 @@ 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
*
@@ -984,6 +995,9 @@ struct ubifs_mount_opts {
* @max_idx_node_sz: maximum indexing node aligned on 8-bytes boundary
* @max_inode_sz: maximum possible inode size in bytes
* @max_znode_sz: size of znode in bytes
+ *
+ * @leb_overhead: how many bytes are wasted in an LEB when it is filled with
+ * data nodes of maximum size - used in free space reporting
* @dead_wm: LEB dead space watermark
* @dark_wm: LEB dark space watermark
* @block_cnt: count of 4KiB blocks on the FS
@@ -1017,6 +1031,8 @@ struct ubifs_mount_opts {
* @sbuf: a buffer of LEB size used by GC and replay for scanning
* @idx_gc: list of index LEBs that have been garbage collected
* @idx_gc_cnt: number of elements on the idx_gc list
+ * @gc_seq: incremented for every non-index LEB garbage collected
+ * @gced_lnum: last non-index LEB that was garbage collected
*
* @infos_list: links all 'ubifs_info' objects
* @umount_mutex: serializes shrinker and un-mount
@@ -1103,7 +1119,6 @@ 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;
@@ -1214,6 +1229,8 @@ struct ubifs_info {
int max_idx_node_sz;
long long max_inode_sz;
int max_znode_sz;
+
+ int leb_overhead;
int dead_wm;
int dark_wm;
int block_cnt;
@@ -1247,6 +1264,8 @@ struct ubifs_info {
void *sbuf;
struct list_head idx_gc;
int idx_gc_cnt;
+ volatile int gc_seq;
+ volatile int gced_lnum;
struct list_head infos_list;
struct mutex umount_mutex;
@@ -1346,6 +1365,7 @@ 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 +1419,8 @@ 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,
@@ -1423,9 +1443,10 @@ void ubifs_release_ino_dirty(struct ubifs_info *c, struct inode *inode,
struct ubifs_budget_req *req);
void ubifs_cancel_ino_op(struct ubifs_info *c, struct inode *inode,
struct ubifs_budget_req *req);
-long long ubifs_budg_get_free_space(struct ubifs_info *c);
+long long ubifs_get_free_space(struct ubifs_info *c);
int ubifs_calc_min_idx_lebs(struct ubifs_info *c);
void ubifs_convert_page_budget(struct ubifs_info *c);
+long long ubifs_reported_space(const struct ubifs_info *c, uint64_t free);
long long ubifs_calc_available(const struct ubifs_info *c, int min_idx_lebs);
/* find.c */
@@ -1440,8 +1461,6 @@ int ubifs_save_dirty_idx_lnums(struct ubifs_info *c);
/* tnc.c */
int ubifs_lookup_level0(struct ubifs_info *c, const union ubifs_key *key,
struct ubifs_znode **zn, int *n);
-int ubifs_tnc_lookup(struct ubifs_info *c, const union ubifs_key *key,
- void *node);
int ubifs_tnc_lookup_nm(struct ubifs_info *c, const union ubifs_key *key,
void *node, const struct qstr *nm);
int ubifs_tnc_locate(struct ubifs_info *c, const union ubifs_key *key,