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authorLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 13:57:49 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 13:57:49 -0400
commit395d73413c5656c6d7706ae91dcb441f9b7e3074 (patch)
tree7fadabe996f70d7918583fa2312d4fad19397fcb /fs/ext4
parentc226fd659fa7b6a7b038df5ae6856a68514bacde (diff)
parent06705bff9114531a997a7d0c2520bea0f2927410 (diff)
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (33 commits) ext4: Regularize mount options ext4: fix locking typo in mballoc which could cause soft lockup hangs ext4: fix typo which causes a memory leak on error path jbd2: Update locking coments ext4: Rename pa_linear to pa_type ext4: add checks of block references for non-extent inodes ext4: Check for an valid i_mode when reading the inode from disk ext4: Use WRITE_SYNC for commits which are caused by fsync() ext4: Add auto_da_alloc mount option ext4: Use struct flex_groups to calculate get_orlov_stats() ext4: Use atomic_t's in struct flex_groups ext4: remove /proc tuning knobs ext4: Add sysfs support ext4: Track lifetime disk writes ext4: Fix discard of inode prealloc space with delayed allocation. ext4: Automatically allocate delay allocated blocks on rename ext4: Automatically allocate delay allocated blocks on close ext4: add EXT4_IOC_ALLOC_DA_BLKS ioctl ext4: Simplify delalloc code by removing mpage_da_writepages() ext4: Save stack space by removing fake buffer heads ...
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/balloc.c14
-rw-r--r--fs/ext4/dir.c16
-rw-r--r--fs/ext4/ext4.h91
-rw-r--r--fs/ext4/ext4_extents.h1
-rw-r--r--fs/ext4/ext4_i.h6
-rw-r--r--fs/ext4/ext4_sb.h14
-rw-r--r--fs/ext4/extents.c127
-rw-r--r--fs/ext4/file.c7
-rw-r--r--fs/ext4/ialloc.c273
-rw-r--r--fs/ext4/inode.c424
-rw-r--r--fs/ext4/ioctl.c17
-rw-r--r--fs/ext4/mballoc.c158
-rw-r--r--fs/ext4/mballoc.h8
-rw-r--r--fs/ext4/namei.c164
-rw-r--r--fs/ext4/resize.c8
-rw-r--r--fs/ext4/super.c327
16 files changed, 1085 insertions, 570 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 38f40d55899c..53c72ad85877 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -55,7 +55,8 @@ static int ext4_block_in_group(struct super_block *sb, ext4_fsblk_t block,
55} 55}
56 56
57static int ext4_group_used_meta_blocks(struct super_block *sb, 57static int ext4_group_used_meta_blocks(struct super_block *sb,
58 ext4_group_t block_group) 58 ext4_group_t block_group,
59 struct ext4_group_desc *gdp)
59{ 60{
60 ext4_fsblk_t tmp; 61 ext4_fsblk_t tmp;
61 struct ext4_sb_info *sbi = EXT4_SB(sb); 62 struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -63,10 +64,6 @@ static int ext4_group_used_meta_blocks(struct super_block *sb,
63 int used_blocks = sbi->s_itb_per_group + 2; 64 int used_blocks = sbi->s_itb_per_group + 2;
64 65
65 if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) { 66 if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
66 struct ext4_group_desc *gdp;
67 struct buffer_head *bh;
68
69 gdp = ext4_get_group_desc(sb, block_group, &bh);
70 if (!ext4_block_in_group(sb, ext4_block_bitmap(sb, gdp), 67 if (!ext4_block_in_group(sb, ext4_block_bitmap(sb, gdp),
71 block_group)) 68 block_group))
72 used_blocks--; 69 used_blocks--;
@@ -177,7 +174,7 @@ unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh,
177 */ 174 */
178 mark_bitmap_end(group_blocks, sb->s_blocksize * 8, bh->b_data); 175 mark_bitmap_end(group_blocks, sb->s_blocksize * 8, bh->b_data);
179 } 176 }
180 return free_blocks - ext4_group_used_meta_blocks(sb, block_group); 177 return free_blocks - ext4_group_used_meta_blocks(sb, block_group, gdp);
181} 178}
182 179
183 180
@@ -473,9 +470,8 @@ void ext4_add_groupblocks(handle_t *handle, struct super_block *sb,
473 470
474 if (sbi->s_log_groups_per_flex) { 471 if (sbi->s_log_groups_per_flex) {
475 ext4_group_t flex_group = ext4_flex_group(sbi, block_group); 472 ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
476 spin_lock(sb_bgl_lock(sbi, flex_group)); 473 atomic_add(blocks_freed,
477 sbi->s_flex_groups[flex_group].free_blocks += blocks_freed; 474 &sbi->s_flex_groups[flex_group].free_blocks);
478 spin_unlock(sb_bgl_lock(sbi, flex_group));
479 } 475 }
480 /* 476 /*
481 * request to reload the buddy with the 477 * request to reload the buddy with the
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index 2df2e40b01af..b64789929a65 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -67,7 +67,8 @@ int ext4_check_dir_entry(const char *function, struct inode *dir,
67 unsigned int offset) 67 unsigned int offset)
68{ 68{
69 const char *error_msg = NULL; 69 const char *error_msg = NULL;
70 const int rlen = ext4_rec_len_from_disk(de->rec_len); 70 const int rlen = ext4_rec_len_from_disk(de->rec_len,
71 dir->i_sb->s_blocksize);
71 72
72 if (rlen < EXT4_DIR_REC_LEN(1)) 73 if (rlen < EXT4_DIR_REC_LEN(1))
73 error_msg = "rec_len is smaller than minimal"; 74 error_msg = "rec_len is smaller than minimal";
@@ -178,10 +179,11 @@ revalidate:
178 * least that it is non-zero. A 179 * least that it is non-zero. A
179 * failure will be detected in the 180 * failure will be detected in the
180 * dirent test below. */ 181 * dirent test below. */
181 if (ext4_rec_len_from_disk(de->rec_len) 182 if (ext4_rec_len_from_disk(de->rec_len,
182 < EXT4_DIR_REC_LEN(1)) 183 sb->s_blocksize) < EXT4_DIR_REC_LEN(1))
183 break; 184 break;
184 i += ext4_rec_len_from_disk(de->rec_len); 185 i += ext4_rec_len_from_disk(de->rec_len,
186 sb->s_blocksize);
185 } 187 }
186 offset = i; 188 offset = i;
187 filp->f_pos = (filp->f_pos & ~(sb->s_blocksize - 1)) 189 filp->f_pos = (filp->f_pos & ~(sb->s_blocksize - 1))
@@ -203,7 +205,8 @@ revalidate:
203 ret = stored; 205 ret = stored;
204 goto out; 206 goto out;
205 } 207 }
206 offset += ext4_rec_len_from_disk(de->rec_len); 208 offset += ext4_rec_len_from_disk(de->rec_len,
209 sb->s_blocksize);
207 if (le32_to_cpu(de->inode)) { 210 if (le32_to_cpu(de->inode)) {
208 /* We might block in the next section 211 /* We might block in the next section
209 * if the data destination is 212 * if the data destination is
@@ -225,7 +228,8 @@ revalidate:
225 goto revalidate; 228 goto revalidate;
226 stored++; 229 stored++;
227 } 230 }
228 filp->f_pos += ext4_rec_len_from_disk(de->rec_len); 231 filp->f_pos += ext4_rec_len_from_disk(de->rec_len,
232 sb->s_blocksize);
229 } 233 }
230 offset = 0; 234 offset = 0;
231 brelse(bh); 235 brelse(bh);
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 990c94000924..d0f15ef56de1 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -33,14 +33,6 @@
33#undef EXT4FS_DEBUG 33#undef EXT4FS_DEBUG
34 34
35/* 35/*
36 * Define EXT4_RESERVATION to reserve data blocks for expanding files
37 */
38#define EXT4_DEFAULT_RESERVE_BLOCKS 8
39/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
40#define EXT4_MAX_RESERVE_BLOCKS 1027
41#define EXT4_RESERVE_WINDOW_NOT_ALLOCATED 0
42
43/*
44 * Debug code 36 * Debug code
45 */ 37 */
46#ifdef EXT4FS_DEBUG 38#ifdef EXT4FS_DEBUG
@@ -54,8 +46,6 @@
54#define ext4_debug(f, a...) do {} while (0) 46#define ext4_debug(f, a...) do {} while (0)
55#endif 47#endif
56 48
57#define EXT4_MULTIBLOCK_ALLOCATOR 1
58
59/* prefer goal again. length */ 49/* prefer goal again. length */
60#define EXT4_MB_HINT_MERGE 1 50#define EXT4_MB_HINT_MERGE 1
61/* blocks already reserved */ 51/* blocks already reserved */
@@ -180,8 +170,9 @@ struct ext4_group_desc
180 */ 170 */
181 171
182struct flex_groups { 172struct flex_groups {
183 __u32 free_inodes; 173 atomic_t free_inodes;
184 __u32 free_blocks; 174 atomic_t free_blocks;
175 atomic_t used_dirs;
185}; 176};
186 177
187#define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ 178#define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */
@@ -249,6 +240,30 @@ struct flex_groups {
249#define EXT4_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */ 240#define EXT4_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */
250#define EXT4_FL_USER_MODIFIABLE 0x000B80FF /* User modifiable flags */ 241#define EXT4_FL_USER_MODIFIABLE 0x000B80FF /* User modifiable flags */
251 242
243/* Flags that should be inherited by new inodes from their parent. */
244#define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\
245 EXT4_SYNC_FL | EXT4_IMMUTABLE_FL | EXT4_APPEND_FL |\
246 EXT4_NODUMP_FL | EXT4_NOATIME_FL |\
247 EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\
248 EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL)
249
250/* Flags that are appropriate for regular files (all but dir-specific ones). */
251#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL))
252
253/* Flags that are appropriate for non-directories/regular files. */
254#define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL)
255
256/* Mask out flags that are inappropriate for the given type of inode. */
257static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags)
258{
259 if (S_ISDIR(mode))
260 return flags;
261 else if (S_ISREG(mode))
262 return flags & EXT4_REG_FLMASK;
263 else
264 return flags & EXT4_OTHER_FLMASK;
265}
266
252/* 267/*
253 * Inode dynamic state flags 268 * Inode dynamic state flags
254 */ 269 */
@@ -256,6 +271,7 @@ struct flex_groups {
256#define EXT4_STATE_NEW 0x00000002 /* inode is newly created */ 271#define EXT4_STATE_NEW 0x00000002 /* inode is newly created */
257#define EXT4_STATE_XATTR 0x00000004 /* has in-inode xattrs */ 272#define EXT4_STATE_XATTR 0x00000004 /* has in-inode xattrs */
258#define EXT4_STATE_NO_EXPAND 0x00000008 /* No space for expansion */ 273#define EXT4_STATE_NO_EXPAND 0x00000008 /* No space for expansion */
274#define EXT4_STATE_DA_ALLOC_CLOSE 0x00000010 /* Alloc DA blks on close */
259 275
260/* Used to pass group descriptor data when online resize is done */ 276/* Used to pass group descriptor data when online resize is done */
261struct ext4_new_group_input { 277struct ext4_new_group_input {
@@ -303,7 +319,9 @@ struct ext4_new_group_data {
303#define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) 319#define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
304#define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) 320#define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input)
305#define EXT4_IOC_MIGRATE _IO('f', 9) 321#define EXT4_IOC_MIGRATE _IO('f', 9)
322 /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */
306 /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ 323 /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */
324#define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12)
307 325
308/* 326/*
309 * ioctl commands in 32 bit emulation 327 * ioctl commands in 32 bit emulation
@@ -531,7 +549,7 @@ do { \
531#define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ 549#define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */
532#define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ 550#define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */
533#define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ 551#define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */
534#define EXT4_MOUNT_RESERVATION 0x10000 /* Preallocation */ 552#define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000 /* No auto delalloc mapping */
535#define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ 553#define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */
536#define EXT4_MOUNT_NOBH 0x40000 /* No bufferheads */ 554#define EXT4_MOUNT_NOBH 0x40000 /* No bufferheads */
537#define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */ 555#define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */
@@ -666,7 +684,8 @@ struct ext4_super_block {
666 __u8 s_log_groups_per_flex; /* FLEX_BG group size */ 684 __u8 s_log_groups_per_flex; /* FLEX_BG group size */
667 __u8 s_reserved_char_pad2; 685 __u8 s_reserved_char_pad2;
668 __le16 s_reserved_pad; 686 __le16 s_reserved_pad;
669 __u32 s_reserved[162]; /* Padding to the end of the block */ 687 __le64 s_kbytes_written; /* nr of lifetime kilobytes written */
688 __u32 s_reserved[160]; /* Padding to the end of the block */
670}; 689};
671 690
672#ifdef __KERNEL__ 691#ifdef __KERNEL__
@@ -814,6 +833,12 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
814#define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ 833#define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */
815 834
816/* 835/*
836 * Minimum number of groups in a flexgroup before we separate out
837 * directories into the first block group of a flexgroup
838 */
839#define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4
840
841/*
817 * Structure of a directory entry 842 * Structure of a directory entry
818 */ 843 */
819#define EXT4_NAME_LEN 255 844#define EXT4_NAME_LEN 255
@@ -865,24 +890,6 @@ struct ext4_dir_entry_2 {
865 ~EXT4_DIR_ROUND) 890 ~EXT4_DIR_ROUND)
866#define EXT4_MAX_REC_LEN ((1<<16)-1) 891#define EXT4_MAX_REC_LEN ((1<<16)-1)
867 892
868static inline unsigned ext4_rec_len_from_disk(__le16 dlen)
869{
870 unsigned len = le16_to_cpu(dlen);
871
872 if (len == EXT4_MAX_REC_LEN || len == 0)
873 return 1 << 16;
874 return len;
875}
876
877static inline __le16 ext4_rec_len_to_disk(unsigned len)
878{
879 if (len == (1 << 16))
880 return cpu_to_le16(EXT4_MAX_REC_LEN);
881 else if (len > (1 << 16))
882 BUG();
883 return cpu_to_le16(len);
884}
885
886/* 893/*
887 * Hash Tree Directory indexing 894 * Hash Tree Directory indexing
888 * (c) Daniel Phillips, 2001 895 * (c) Daniel Phillips, 2001
@@ -970,22 +977,6 @@ void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr,
970 977
971extern struct proc_dir_entry *ext4_proc_root; 978extern struct proc_dir_entry *ext4_proc_root;
972 979
973#ifdef CONFIG_PROC_FS
974extern const struct file_operations ext4_ui_proc_fops;
975
976#define EXT4_PROC_HANDLER(name, var) \
977do { \
978 proc = proc_create_data(name, mode, sbi->s_proc, \
979 &ext4_ui_proc_fops, &sbi->s_##var); \
980 if (proc == NULL) { \
981 printk(KERN_ERR "EXT4-fs: can't create %s\n", name); \
982 goto err_out; \
983 } \
984} while (0)
985#else
986#define EXT4_PROC_HANDLER(name, var)
987#endif
988
989/* 980/*
990 * Function prototypes 981 * Function prototypes
991 */ 982 */
@@ -1092,6 +1083,7 @@ extern int ext4_can_truncate(struct inode *inode);
1092extern void ext4_truncate(struct inode *); 1083extern void ext4_truncate(struct inode *);
1093extern void ext4_set_inode_flags(struct inode *); 1084extern void ext4_set_inode_flags(struct inode *);
1094extern void ext4_get_inode_flags(struct ext4_inode_info *); 1085extern void ext4_get_inode_flags(struct ext4_inode_info *);
1086extern int ext4_alloc_da_blocks(struct inode *inode);
1095extern void ext4_set_aops(struct inode *inode); 1087extern void ext4_set_aops(struct inode *inode);
1096extern int ext4_writepage_trans_blocks(struct inode *); 1088extern int ext4_writepage_trans_blocks(struct inode *);
1097extern int ext4_meta_trans_blocks(struct inode *, int nrblocks, int idxblocks); 1089extern int ext4_meta_trans_blocks(struct inode *, int nrblocks, int idxblocks);
@@ -1107,7 +1099,10 @@ extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long);
1107 1099
1108/* migrate.c */ 1100/* migrate.c */
1109extern int ext4_ext_migrate(struct inode *); 1101extern int ext4_ext_migrate(struct inode *);
1102
1110/* namei.c */ 1103/* namei.c */
1104extern unsigned int ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize);
1105extern __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize);
1111extern int ext4_orphan_add(handle_t *, struct inode *); 1106extern int ext4_orphan_add(handle_t *, struct inode *);
1112extern int ext4_orphan_del(handle_t *, struct inode *); 1107extern int ext4_orphan_del(handle_t *, struct inode *);
1113extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, 1108extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h
index 18cb67b2cbbc..f0c3ec85bd48 100644
--- a/fs/ext4/ext4_extents.h
+++ b/fs/ext4/ext4_extents.h
@@ -241,5 +241,6 @@ extern int ext4_ext_search_left(struct inode *, struct ext4_ext_path *,
241extern int ext4_ext_search_right(struct inode *, struct ext4_ext_path *, 241extern int ext4_ext_search_right(struct inode *, struct ext4_ext_path *,
242 ext4_lblk_t *, ext4_fsblk_t *); 242 ext4_lblk_t *, ext4_fsblk_t *);
243extern void ext4_ext_drop_refs(struct ext4_ext_path *); 243extern void ext4_ext_drop_refs(struct ext4_ext_path *);
244extern int ext4_ext_check_inode(struct inode *inode);
244#endif /* _EXT4_EXTENTS */ 245#endif /* _EXT4_EXTENTS */
245 246
diff --git a/fs/ext4/ext4_i.h b/fs/ext4/ext4_i.h
index e69acc16f5c4..4ce2187123aa 100644
--- a/fs/ext4/ext4_i.h
+++ b/fs/ext4/ext4_i.h
@@ -33,9 +33,6 @@ typedef __u32 ext4_lblk_t;
33/* data type for block group number */ 33/* data type for block group number */
34typedef unsigned int ext4_group_t; 34typedef unsigned int ext4_group_t;
35 35
36#define rsv_start rsv_window._rsv_start
37#define rsv_end rsv_window._rsv_end
38
39/* 36/*
40 * storage for cached extent 37 * storage for cached extent
41 */ 38 */
@@ -125,6 +122,9 @@ struct ext4_inode_info {
125 struct list_head i_prealloc_list; 122 struct list_head i_prealloc_list;
126 spinlock_t i_prealloc_lock; 123 spinlock_t i_prealloc_lock;
127 124
125 /* ialloc */
126 ext4_group_t i_last_alloc_group;
127
128 /* allocation reservation info for delalloc */ 128 /* allocation reservation info for delalloc */
129 unsigned int i_reserved_data_blocks; 129 unsigned int i_reserved_data_blocks;
130 unsigned int i_reserved_meta_blocks; 130 unsigned int i_reserved_meta_blocks;
diff --git a/fs/ext4/ext4_sb.h b/fs/ext4/ext4_sb.h
index 039b6ea1a042..57b71fefbccf 100644
--- a/fs/ext4/ext4_sb.h
+++ b/fs/ext4/ext4_sb.h
@@ -62,12 +62,10 @@ struct ext4_sb_info {
62 struct percpu_counter s_freeinodes_counter; 62 struct percpu_counter s_freeinodes_counter;
63 struct percpu_counter s_dirs_counter; 63 struct percpu_counter s_dirs_counter;
64 struct percpu_counter s_dirtyblocks_counter; 64 struct percpu_counter s_dirtyblocks_counter;
65 struct blockgroup_lock s_blockgroup_lock; 65 struct blockgroup_lock *s_blockgroup_lock;
66 struct proc_dir_entry *s_proc; 66 struct proc_dir_entry *s_proc;
67 67 struct kobject s_kobj;
68 /* root of the per fs reservation window tree */ 68 struct completion s_kobj_unregister;
69 spinlock_t s_rsv_window_lock;
70 struct rb_root s_rsv_window_root;
71 69
72 /* Journaling */ 70 /* Journaling */
73 struct inode *s_journal_inode; 71 struct inode *s_journal_inode;
@@ -146,6 +144,10 @@ struct ext4_sb_info {
146 /* locality groups */ 144 /* locality groups */
147 struct ext4_locality_group *s_locality_groups; 145 struct ext4_locality_group *s_locality_groups;
148 146
147 /* for write statistics */
148 unsigned long s_sectors_written_start;
149 u64 s_kbytes_written;
150
149 unsigned int s_log_groups_per_flex; 151 unsigned int s_log_groups_per_flex;
150 struct flex_groups *s_flex_groups; 152 struct flex_groups *s_flex_groups;
151}; 153};
@@ -153,7 +155,7 @@ struct ext4_sb_info {
153static inline spinlock_t * 155static inline spinlock_t *
154sb_bgl_lock(struct ext4_sb_info *sbi, unsigned int block_group) 156sb_bgl_lock(struct ext4_sb_info *sbi, unsigned int block_group)
155{ 157{
156 return bgl_lock_ptr(&sbi->s_blockgroup_lock, block_group); 158 return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group);
157} 159}
158 160
159#endif /* _EXT4_SB */ 161#endif /* _EXT4_SB */
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index e0aa4fe4f596..ac77d8b8251d 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -152,6 +152,8 @@ static ext4_fsblk_t ext4_ext_find_goal(struct inode *inode,
152 ext4_fsblk_t bg_start; 152 ext4_fsblk_t bg_start;
153 ext4_fsblk_t last_block; 153 ext4_fsblk_t last_block;
154 ext4_grpblk_t colour; 154 ext4_grpblk_t colour;
155 ext4_group_t block_group;
156 int flex_size = ext4_flex_bg_size(EXT4_SB(inode->i_sb));
155 int depth; 157 int depth;
156 158
157 if (path) { 159 if (path) {
@@ -170,10 +172,31 @@ static ext4_fsblk_t ext4_ext_find_goal(struct inode *inode,
170 } 172 }
171 173
172 /* OK. use inode's group */ 174 /* OK. use inode's group */
173 bg_start = (ei->i_block_group * EXT4_BLOCKS_PER_GROUP(inode->i_sb)) + 175 block_group = ei->i_block_group;
176 if (flex_size >= EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME) {
177 /*
178 * If there are at least EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME
179 * block groups per flexgroup, reserve the first block
180 * group for directories and special files. Regular
181 * files will start at the second block group. This
182 * tends to speed up directory access and improves
183 * fsck times.
184 */
185 block_group &= ~(flex_size-1);
186 if (S_ISREG(inode->i_mode))
187 block_group++;
188 }
189 bg_start = (block_group * EXT4_BLOCKS_PER_GROUP(inode->i_sb)) +
174 le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_first_data_block); 190 le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_first_data_block);
175 last_block = ext4_blocks_count(EXT4_SB(inode->i_sb)->s_es) - 1; 191 last_block = ext4_blocks_count(EXT4_SB(inode->i_sb)->s_es) - 1;
176 192
193 /*
194 * If we are doing delayed allocation, we don't need take
195 * colour into account.
196 */
197 if (test_opt(inode->i_sb, DELALLOC))
198 return bg_start;
199
177 if (bg_start + EXT4_BLOCKS_PER_GROUP(inode->i_sb) <= last_block) 200 if (bg_start + EXT4_BLOCKS_PER_GROUP(inode->i_sb) <= last_block)
178 colour = (current->pid % 16) * 201 colour = (current->pid % 16) *
179 (EXT4_BLOCKS_PER_GROUP(inode->i_sb) / 16); 202 (EXT4_BLOCKS_PER_GROUP(inode->i_sb) / 16);
@@ -301,7 +324,64 @@ ext4_ext_max_entries(struct inode *inode, int depth)
301 return max; 324 return max;
302} 325}
303 326
304static int __ext4_ext_check_header(const char *function, struct inode *inode, 327static int ext4_valid_extent(struct inode *inode, struct ext4_extent *ext)
328{
329 ext4_fsblk_t block = ext_pblock(ext);
330 int len = ext4_ext_get_actual_len(ext);
331 struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
332 if (unlikely(block < le32_to_cpu(es->s_first_data_block) ||
333 ((block + len) > ext4_blocks_count(es))))
334 return 0;
335 else
336 return 1;
337}
338
339static int ext4_valid_extent_idx(struct inode *inode,
340 struct ext4_extent_idx *ext_idx)
341{
342 ext4_fsblk_t block = idx_pblock(ext_idx);
343 struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
344 if (unlikely(block < le32_to_cpu(es->s_first_data_block) ||
345 (block > ext4_blocks_count(es))))
346 return 0;
347 else
348 return 1;
349}
350
351static int ext4_valid_extent_entries(struct inode *inode,
352 struct ext4_extent_header *eh,
353 int depth)
354{
355 struct ext4_extent *ext;
356 struct ext4_extent_idx *ext_idx;
357 unsigned short entries;
358 if (eh->eh_entries == 0)
359 return 1;
360
361 entries = le16_to_cpu(eh->eh_entries);
362
363 if (depth == 0) {
364 /* leaf entries */
365 ext = EXT_FIRST_EXTENT(eh);
366 while (entries) {
367 if (!ext4_valid_extent(inode, ext))
368 return 0;
369 ext++;
370 entries--;
371 }
372 } else {
373 ext_idx = EXT_FIRST_INDEX(eh);
374 while (entries) {
375 if (!ext4_valid_extent_idx(inode, ext_idx))
376 return 0;
377 ext_idx++;
378 entries--;
379 }
380 }
381 return 1;
382}
383
384static int __ext4_ext_check(const char *function, struct inode *inode,
305 struct ext4_extent_header *eh, 385 struct ext4_extent_header *eh,
306 int depth) 386 int depth)
307{ 387{
@@ -329,11 +409,15 @@ static int __ext4_ext_check_header(const char *function, struct inode *inode,
329 error_msg = "invalid eh_entries"; 409 error_msg = "invalid eh_entries";
330 goto corrupted; 410 goto corrupted;
331 } 411 }
412 if (!ext4_valid_extent_entries(inode, eh, depth)) {
413 error_msg = "invalid extent entries";
414 goto corrupted;
415 }
332 return 0; 416 return 0;
333 417
334corrupted: 418corrupted:
335 ext4_error(inode->i_sb, function, 419 ext4_error(inode->i_sb, function,
336 "bad header in inode #%lu: %s - magic %x, " 420 "bad header/extent in inode #%lu: %s - magic %x, "
337 "entries %u, max %u(%u), depth %u(%u)", 421 "entries %u, max %u(%u), depth %u(%u)",
338 inode->i_ino, error_msg, le16_to_cpu(eh->eh_magic), 422 inode->i_ino, error_msg, le16_to_cpu(eh->eh_magic),
339 le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max), 423 le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max),
@@ -342,8 +426,13 @@ corrupted:
342 return -EIO; 426 return -EIO;
343} 427}
344 428
345#define ext4_ext_check_header(inode, eh, depth) \ 429#define ext4_ext_check(inode, eh, depth) \
346 __ext4_ext_check_header(__func__, inode, eh, depth) 430 __ext4_ext_check(__func__, inode, eh, depth)
431
432int ext4_ext_check_inode(struct inode *inode)
433{
434 return ext4_ext_check(inode, ext_inode_hdr(inode), ext_depth(inode));
435}
347 436
348#ifdef EXT_DEBUG 437#ifdef EXT_DEBUG
349static void ext4_ext_show_path(struct inode *inode, struct ext4_ext_path *path) 438static void ext4_ext_show_path(struct inode *inode, struct ext4_ext_path *path)
@@ -547,9 +636,6 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
547 636
548 eh = ext_inode_hdr(inode); 637 eh = ext_inode_hdr(inode);
549 depth = ext_depth(inode); 638 depth = ext_depth(inode);
550 if (ext4_ext_check_header(inode, eh, depth))
551 return ERR_PTR(-EIO);
552
553 639
554 /* account possible depth increase */ 640 /* account possible depth increase */
555 if (!path) { 641 if (!path) {
@@ -565,6 +651,8 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
565 i = depth; 651 i = depth;
566 /* walk through the tree */ 652 /* walk through the tree */
567 while (i) { 653 while (i) {
654 int need_to_validate = 0;
655
568 ext_debug("depth %d: num %d, max %d\n", 656 ext_debug("depth %d: num %d, max %d\n",
569 ppos, le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max)); 657 ppos, le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max));
570 658
@@ -573,10 +661,17 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
573 path[ppos].p_depth = i; 661 path[ppos].p_depth = i;
574 path[ppos].p_ext = NULL; 662 path[ppos].p_ext = NULL;
575 663
576 bh = sb_bread(inode->i_sb, path[ppos].p_block); 664 bh = sb_getblk(inode->i_sb, path[ppos].p_block);
577 if (!bh) 665 if (unlikely(!bh))
578 goto err; 666 goto err;
579 667 if (!bh_uptodate_or_lock(bh)) {
668 if (bh_submit_read(bh) < 0) {
669 put_bh(bh);
670 goto err;
671 }
672 /* validate the extent entries */
673 need_to_validate = 1;
674 }
580 eh = ext_block_hdr(bh); 675 eh = ext_block_hdr(bh);
581 ppos++; 676 ppos++;
582 BUG_ON(ppos > depth); 677 BUG_ON(ppos > depth);
@@ -584,7 +679,7 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
584 path[ppos].p_hdr = eh; 679 path[ppos].p_hdr = eh;
585 i--; 680 i--;
586 681
587 if (ext4_ext_check_header(inode, eh, i)) 682 if (need_to_validate && ext4_ext_check(inode, eh, i))
588 goto err; 683 goto err;
589 } 684 }
590 685
@@ -1181,7 +1276,7 @@ got_index:
1181 return -EIO; 1276 return -EIO;
1182 eh = ext_block_hdr(bh); 1277 eh = ext_block_hdr(bh);
1183 /* subtract from p_depth to get proper eh_depth */ 1278 /* subtract from p_depth to get proper eh_depth */
1184 if (ext4_ext_check_header(inode, eh, path->p_depth - depth)) { 1279 if (ext4_ext_check(inode, eh, path->p_depth - depth)) {
1185 put_bh(bh); 1280 put_bh(bh);
1186 return -EIO; 1281 return -EIO;
1187 } 1282 }
@@ -1194,7 +1289,7 @@ got_index:
1194 if (bh == NULL) 1289 if (bh == NULL)
1195 return -EIO; 1290 return -EIO;
1196 eh = ext_block_hdr(bh); 1291 eh = ext_block_hdr(bh);
1197 if (ext4_ext_check_header(inode, eh, path->p_depth - depth)) { 1292 if (ext4_ext_check(inode, eh, path->p_depth - depth)) {
1198 put_bh(bh); 1293 put_bh(bh);
1199 return -EIO; 1294 return -EIO;
1200 } 1295 }
@@ -2137,7 +2232,7 @@ static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start)
2137 return -ENOMEM; 2232 return -ENOMEM;
2138 } 2233 }
2139 path[0].p_hdr = ext_inode_hdr(inode); 2234 path[0].p_hdr = ext_inode_hdr(inode);
2140 if (ext4_ext_check_header(inode, path[0].p_hdr, depth)) { 2235 if (ext4_ext_check(inode, path[0].p_hdr, depth)) {
2141 err = -EIO; 2236 err = -EIO;
2142 goto out; 2237 goto out;
2143 } 2238 }
@@ -2191,7 +2286,7 @@ static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start)
2191 err = -EIO; 2286 err = -EIO;
2192 break; 2287 break;
2193 } 2288 }
2194 if (ext4_ext_check_header(inode, ext_block_hdr(bh), 2289 if (ext4_ext_check(inode, ext_block_hdr(bh),
2195 depth - i - 1)) { 2290 depth - i - 1)) {
2196 err = -EIO; 2291 err = -EIO;
2197 break; 2292 break;
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index f731cb545a03..588af8c77246 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -33,9 +33,14 @@
33 */ 33 */
34static int ext4_release_file(struct inode *inode, struct file *filp) 34static int ext4_release_file(struct inode *inode, struct file *filp)
35{ 35{
36 if (EXT4_I(inode)->i_state & EXT4_STATE_DA_ALLOC_CLOSE) {
37 ext4_alloc_da_blocks(inode);
38 EXT4_I(inode)->i_state &= ~EXT4_STATE_DA_ALLOC_CLOSE;
39 }
36 /* if we are the last writer on the inode, drop the block reservation */ 40 /* if we are the last writer on the inode, drop the block reservation */
37 if ((filp->f_mode & FMODE_WRITE) && 41 if ((filp->f_mode & FMODE_WRITE) &&
38 (atomic_read(&inode->i_writecount) == 1)) 42 (atomic_read(&inode->i_writecount) == 1) &&
43 !EXT4_I(inode)->i_reserved_data_blocks)
39 { 44 {
40 down_write(&EXT4_I(inode)->i_data_sem); 45 down_write(&EXT4_I(inode)->i_data_sem);
41 ext4_discard_preallocations(inode); 46 ext4_discard_preallocations(inode);
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index fb51b40e3e8f..47b84e8df568 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -189,7 +189,6 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
189 struct ext4_super_block *es; 189 struct ext4_super_block *es;
190 struct ext4_sb_info *sbi; 190 struct ext4_sb_info *sbi;
191 int fatal = 0, err, count, cleared; 191 int fatal = 0, err, count, cleared;
192 ext4_group_t flex_group;
193 192
194 if (atomic_read(&inode->i_count) > 1) { 193 if (atomic_read(&inode->i_count) > 1) {
195 printk(KERN_ERR "ext4_free_inode: inode has count=%d\n", 194 printk(KERN_ERR "ext4_free_inode: inode has count=%d\n",
@@ -268,6 +267,13 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
268 if (is_directory) { 267 if (is_directory) {
269 count = ext4_used_dirs_count(sb, gdp) - 1; 268 count = ext4_used_dirs_count(sb, gdp) - 1;
270 ext4_used_dirs_set(sb, gdp, count); 269 ext4_used_dirs_set(sb, gdp, count);
270 if (sbi->s_log_groups_per_flex) {
271 ext4_group_t f;
272
273 f = ext4_flex_group(sbi, block_group);
274 atomic_dec(&sbi->s_flex_groups[f].free_inodes);
275 }
276
271 } 277 }
272 gdp->bg_checksum = ext4_group_desc_csum(sbi, 278 gdp->bg_checksum = ext4_group_desc_csum(sbi,
273 block_group, gdp); 279 block_group, gdp);
@@ -277,10 +283,10 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
277 percpu_counter_dec(&sbi->s_dirs_counter); 283 percpu_counter_dec(&sbi->s_dirs_counter);
278 284
279 if (sbi->s_log_groups_per_flex) { 285 if (sbi->s_log_groups_per_flex) {
280 flex_group = ext4_flex_group(sbi, block_group); 286 ext4_group_t f;
281 spin_lock(sb_bgl_lock(sbi, flex_group)); 287
282 sbi->s_flex_groups[flex_group].free_inodes++; 288 f = ext4_flex_group(sbi, block_group);
283 spin_unlock(sb_bgl_lock(sbi, flex_group)); 289 atomic_inc(&sbi->s_flex_groups[f].free_inodes);
284 } 290 }
285 } 291 }
286 BUFFER_TRACE(bh2, "call ext4_handle_dirty_metadata"); 292 BUFFER_TRACE(bh2, "call ext4_handle_dirty_metadata");
@@ -360,9 +366,9 @@ static int find_group_flex(struct super_block *sb, struct inode *parent,
360 sbi->s_log_groups_per_flex; 366 sbi->s_log_groups_per_flex;
361 367
362find_close_to_parent: 368find_close_to_parent:
363 flexbg_free_blocks = flex_group[best_flex].free_blocks; 369 flexbg_free_blocks = atomic_read(&flex_group[best_flex].free_blocks);
364 flex_freeb_ratio = flexbg_free_blocks * 100 / blocks_per_flex; 370 flex_freeb_ratio = flexbg_free_blocks * 100 / blocks_per_flex;
365 if (flex_group[best_flex].free_inodes && 371 if (atomic_read(&flex_group[best_flex].free_inodes) &&
366 flex_freeb_ratio > free_block_ratio) 372 flex_freeb_ratio > free_block_ratio)
367 goto found_flexbg; 373 goto found_flexbg;
368 374
@@ -375,24 +381,24 @@ find_close_to_parent:
375 if (i == parent_fbg_group || i == parent_fbg_group - 1) 381 if (i == parent_fbg_group || i == parent_fbg_group - 1)
376 continue; 382 continue;
377 383
378 flexbg_free_blocks = flex_group[i].free_blocks; 384 flexbg_free_blocks = atomic_read(&flex_group[i].free_blocks);
379 flex_freeb_ratio = flexbg_free_blocks * 100 / blocks_per_flex; 385 flex_freeb_ratio = flexbg_free_blocks * 100 / blocks_per_flex;
380 386
381 if (flex_freeb_ratio > free_block_ratio && 387 if (flex_freeb_ratio > free_block_ratio &&
382 flex_group[i].free_inodes) { 388 (atomic_read(&flex_group[i].free_inodes))) {
383 best_flex = i; 389 best_flex = i;
384 goto found_flexbg; 390 goto found_flexbg;
385 } 391 }
386 392
387 if (flex_group[best_flex].free_inodes == 0 || 393 if ((atomic_read(&flex_group[best_flex].free_inodes) == 0) ||
388 (flex_group[i].free_blocks > 394 ((atomic_read(&flex_group[i].free_blocks) >
389 flex_group[best_flex].free_blocks && 395 atomic_read(&flex_group[best_flex].free_blocks)) &&
390 flex_group[i].free_inodes)) 396 atomic_read(&flex_group[i].free_inodes)))
391 best_flex = i; 397 best_flex = i;
392 } 398 }
393 399
394 if (!flex_group[best_flex].free_inodes || 400 if (!atomic_read(&flex_group[best_flex].free_inodes) ||
395 !flex_group[best_flex].free_blocks) 401 !atomic_read(&flex_group[best_flex].free_blocks))
396 return -1; 402 return -1;
397 403
398found_flexbg: 404found_flexbg:
@@ -410,6 +416,42 @@ out:
410 return 0; 416 return 0;
411} 417}
412 418
419struct orlov_stats {
420 __u32 free_inodes;
421 __u32 free_blocks;
422 __u32 used_dirs;
423};
424
425/*
426 * Helper function for Orlov's allocator; returns critical information
427 * for a particular block group or flex_bg. If flex_size is 1, then g
428 * is a block group number; otherwise it is flex_bg number.
429 */
430void get_orlov_stats(struct super_block *sb, ext4_group_t g,
431 int flex_size, struct orlov_stats *stats)
432{
433 struct ext4_group_desc *desc;
434 struct flex_groups *flex_group = EXT4_SB(sb)->s_flex_groups;
435
436 if (flex_size > 1) {
437 stats->free_inodes = atomic_read(&flex_group[g].free_inodes);
438 stats->free_blocks = atomic_read(&flex_group[g].free_blocks);
439 stats->used_dirs = atomic_read(&flex_group[g].used_dirs);
440 return;
441 }
442
443 desc = ext4_get_group_desc(sb, g, NULL);
444 if (desc) {
445 stats->free_inodes = ext4_free_inodes_count(sb, desc);
446 stats->free_blocks = ext4_free_blks_count(sb, desc);
447 stats->used_dirs = ext4_used_dirs_count(sb, desc);
448 } else {
449 stats->free_inodes = 0;
450 stats->free_blocks = 0;
451 stats->used_dirs = 0;
452 }
453}
454
413/* 455/*
414 * Orlov's allocator for directories. 456 * Orlov's allocator for directories.
415 * 457 *
@@ -425,35 +467,34 @@ out:
425 * it has too many directories already (max_dirs) or 467 * it has too many directories already (max_dirs) or
426 * it has too few free inodes left (min_inodes) or 468 * it has too few free inodes left (min_inodes) or
427 * it has too few free blocks left (min_blocks) or 469 * it has too few free blocks left (min_blocks) or
428 * it's already running too large debt (max_debt).
429 * Parent's group is preferred, if it doesn't satisfy these 470 * Parent's group is preferred, if it doesn't satisfy these
430 * conditions we search cyclically through the rest. If none 471 * conditions we search cyclically through the rest. If none
431 * of the groups look good we just look for a group with more 472 * of the groups look good we just look for a group with more
432 * free inodes than average (starting at parent's group). 473 * free inodes than average (starting at parent's group).
433 *
434 * Debt is incremented each time we allocate a directory and decremented
435 * when we allocate an inode, within 0--255.
436 */ 474 */
437 475
438#define INODE_COST 64
439#define BLOCK_COST 256
440
441static int find_group_orlov(struct super_block *sb, struct inode *parent, 476static int find_group_orlov(struct super_block *sb, struct inode *parent,
442 ext4_group_t *group) 477 ext4_group_t *group, int mode)
443{ 478{
444 ext4_group_t parent_group = EXT4_I(parent)->i_block_group; 479 ext4_group_t parent_group = EXT4_I(parent)->i_block_group;
445 struct ext4_sb_info *sbi = EXT4_SB(sb); 480 struct ext4_sb_info *sbi = EXT4_SB(sb);
446 struct ext4_super_block *es = sbi->s_es;
447 ext4_group_t ngroups = sbi->s_groups_count; 481 ext4_group_t ngroups = sbi->s_groups_count;
448 int inodes_per_group = EXT4_INODES_PER_GROUP(sb); 482 int inodes_per_group = EXT4_INODES_PER_GROUP(sb);
449 unsigned int freei, avefreei; 483 unsigned int freei, avefreei;
450 ext4_fsblk_t freeb, avefreeb; 484 ext4_fsblk_t freeb, avefreeb;
451 ext4_fsblk_t blocks_per_dir;
452 unsigned int ndirs; 485 unsigned int ndirs;
453 int max_debt, max_dirs, min_inodes; 486 int max_dirs, min_inodes;
454 ext4_grpblk_t min_blocks; 487 ext4_grpblk_t min_blocks;
455 ext4_group_t i; 488 ext4_group_t i, grp, g;
456 struct ext4_group_desc *desc; 489 struct ext4_group_desc *desc;
490 struct orlov_stats stats;
491 int flex_size = ext4_flex_bg_size(sbi);
492
493 if (flex_size > 1) {
494 ngroups = (ngroups + flex_size - 1) >>
495 sbi->s_log_groups_per_flex;
496 parent_group >>= sbi->s_log_groups_per_flex;
497 }
457 498
458 freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter); 499 freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter);
459 avefreei = freei / ngroups; 500 avefreei = freei / ngroups;
@@ -462,71 +503,97 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent,
462 do_div(avefreeb, ngroups); 503 do_div(avefreeb, ngroups);
463 ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter); 504 ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter);
464 505
465 if ((parent == sb->s_root->d_inode) || 506 if (S_ISDIR(mode) &&
466 (EXT4_I(parent)->i_flags & EXT4_TOPDIR_FL)) { 507 ((parent == sb->s_root->d_inode) ||
508 (EXT4_I(parent)->i_flags & EXT4_TOPDIR_FL))) {
467 int best_ndir = inodes_per_group; 509 int best_ndir = inodes_per_group;
468 ext4_group_t grp;
469 int ret = -1; 510 int ret = -1;
470 511
471 get_random_bytes(&grp, sizeof(grp)); 512 get_random_bytes(&grp, sizeof(grp));
472 parent_group = (unsigned)grp % ngroups; 513 parent_group = (unsigned)grp % ngroups;
473 for (i = 0; i < ngroups; i++) { 514 for (i = 0; i < ngroups; i++) {
474 grp = (parent_group + i) % ngroups; 515 g = (parent_group + i) % ngroups;
475 desc = ext4_get_group_desc(sb, grp, NULL); 516 get_orlov_stats(sb, g, flex_size, &stats);
476 if (!desc || !ext4_free_inodes_count(sb, desc)) 517 if (!stats.free_inodes)
477 continue; 518 continue;
478 if (ext4_used_dirs_count(sb, desc) >= best_ndir) 519 if (stats.used_dirs >= best_ndir)
479 continue; 520 continue;
480 if (ext4_free_inodes_count(sb, desc) < avefreei) 521 if (stats.free_inodes < avefreei)
481 continue; 522 continue;
482 if (ext4_free_blks_count(sb, desc) < avefreeb) 523 if (stats.free_blocks < avefreeb)
483 continue; 524 continue;
484 *group = grp; 525 grp = g;
485 ret = 0; 526 ret = 0;
486 best_ndir = ext4_used_dirs_count(sb, desc); 527 best_ndir = stats.used_dirs;
528 }
529 if (ret)
530 goto fallback;
531 found_flex_bg:
532 if (flex_size == 1) {
533 *group = grp;
534 return 0;
535 }
536
537 /*
538 * We pack inodes at the beginning of the flexgroup's
539 * inode tables. Block allocation decisions will do
540 * something similar, although regular files will
541 * start at 2nd block group of the flexgroup. See
542 * ext4_ext_find_goal() and ext4_find_near().
543 */
544 grp *= flex_size;
545 for (i = 0; i < flex_size; i++) {
546 if (grp+i >= sbi->s_groups_count)
547 break;
548 desc = ext4_get_group_desc(sb, grp+i, NULL);
549 if (desc && ext4_free_inodes_count(sb, desc)) {
550 *group = grp+i;
551 return 0;
552 }
487 } 553 }
488 if (ret == 0)
489 return ret;
490 goto fallback; 554 goto fallback;
491 } 555 }
492 556
493 blocks_per_dir = ext4_blocks_count(es) - freeb;
494 do_div(blocks_per_dir, ndirs);
495
496 max_dirs = ndirs / ngroups + inodes_per_group / 16; 557 max_dirs = ndirs / ngroups + inodes_per_group / 16;
497 min_inodes = avefreei - inodes_per_group / 4; 558 min_inodes = avefreei - inodes_per_group*flex_size / 4;
498 min_blocks = avefreeb - EXT4_BLOCKS_PER_GROUP(sb) / 4; 559 if (min_inodes < 1)
499 560 min_inodes = 1;
500 max_debt = EXT4_BLOCKS_PER_GROUP(sb); 561 min_blocks = avefreeb - EXT4_BLOCKS_PER_GROUP(sb)*flex_size / 4;
501 max_debt /= max_t(int, blocks_per_dir, BLOCK_COST); 562
502 if (max_debt * INODE_COST > inodes_per_group) 563 /*
503 max_debt = inodes_per_group / INODE_COST; 564 * Start looking in the flex group where we last allocated an
504 if (max_debt > 255) 565 * inode for this parent directory
505 max_debt = 255; 566 */
506 if (max_debt == 0) 567 if (EXT4_I(parent)->i_last_alloc_group != ~0) {
507 max_debt = 1; 568 parent_group = EXT4_I(parent)->i_last_alloc_group;
569 if (flex_size > 1)
570 parent_group >>= sbi->s_log_groups_per_flex;
571 }
508 572
509 for (i = 0; i < ngroups; i++) { 573 for (i = 0; i < ngroups; i++) {
510 *group = (parent_group + i) % ngroups; 574 grp = (parent_group + i) % ngroups;
511 desc = ext4_get_group_desc(sb, *group, NULL); 575 get_orlov_stats(sb, grp, flex_size, &stats);
512 if (!desc || !ext4_free_inodes_count(sb, desc)) 576 if (stats.used_dirs >= max_dirs)
513 continue;
514 if (ext4_used_dirs_count(sb, desc) >= max_dirs)
515 continue; 577 continue;
516 if (ext4_free_inodes_count(sb, desc) < min_inodes) 578 if (stats.free_inodes < min_inodes)
517 continue; 579 continue;
518 if (ext4_free_blks_count(sb, desc) < min_blocks) 580 if (stats.free_blocks < min_blocks)
519 continue; 581 continue;
520 return 0; 582 goto found_flex_bg;
521 } 583 }
522 584
523fallback: 585fallback:
586 ngroups = sbi->s_groups_count;
587 avefreei = freei / ngroups;
588 parent_group = EXT4_I(parent)->i_block_group;
524 for (i = 0; i < ngroups; i++) { 589 for (i = 0; i < ngroups; i++) {
525 *group = (parent_group + i) % ngroups; 590 grp = (parent_group + i) % ngroups;
526 desc = ext4_get_group_desc(sb, *group, NULL); 591 desc = ext4_get_group_desc(sb, grp, NULL);
527 if (desc && ext4_free_inodes_count(sb, desc) && 592 if (desc && ext4_free_inodes_count(sb, desc) &&
528 ext4_free_inodes_count(sb, desc) >= avefreei) 593 ext4_free_inodes_count(sb, desc) >= avefreei) {
594 *group = grp;
529 return 0; 595 return 0;
596 }
530 } 597 }
531 598
532 if (avefreei) { 599 if (avefreei) {
@@ -542,12 +609,51 @@ fallback:
542} 609}
543 610
544static int find_group_other(struct super_block *sb, struct inode *parent, 611static int find_group_other(struct super_block *sb, struct inode *parent,
545 ext4_group_t *group) 612 ext4_group_t *group, int mode)
546{ 613{
547 ext4_group_t parent_group = EXT4_I(parent)->i_block_group; 614 ext4_group_t parent_group = EXT4_I(parent)->i_block_group;
548 ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 615 ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
549 struct ext4_group_desc *desc; 616 struct ext4_group_desc *desc;
550 ext4_group_t i; 617 ext4_group_t i, last;
618 int flex_size = ext4_flex_bg_size(EXT4_SB(sb));
619
620 /*
621 * Try to place the inode is the same flex group as its
622 * parent. If we can't find space, use the Orlov algorithm to
623 * find another flex group, and store that information in the
624 * parent directory's inode information so that use that flex
625 * group for future allocations.
626 */
627 if (flex_size > 1) {
628 int retry = 0;
629
630 try_again:
631 parent_group &= ~(flex_size-1);
632 last = parent_group + flex_size;
633 if (last > ngroups)
634 last = ngroups;
635 for (i = parent_group; i < last; i++) {
636 desc = ext4_get_group_desc(sb, i, NULL);
637 if (desc && ext4_free_inodes_count(sb, desc)) {
638 *group = i;
639 return 0;
640 }
641 }
642 if (!retry && EXT4_I(parent)->i_last_alloc_group != ~0) {
643 retry = 1;
644 parent_group = EXT4_I(parent)->i_last_alloc_group;
645 goto try_again;
646 }
647 /*
648 * If this didn't work, use the Orlov search algorithm
649 * to find a new flex group; we pass in the mode to
650 * avoid the topdir algorithms.
651 */
652 *group = parent_group + flex_size;
653 if (*group > ngroups)
654 *group = 0;
655 return find_group_orlov(sb, parent, group, mode);
656 }
551 657
552 /* 658 /*
553 * Try to place the inode in its parent directory 659 * Try to place the inode in its parent directory
@@ -665,6 +771,11 @@ static int ext4_claim_inode(struct super_block *sb,
665 if (S_ISDIR(mode)) { 771 if (S_ISDIR(mode)) {
666 count = ext4_used_dirs_count(sb, gdp) + 1; 772 count = ext4_used_dirs_count(sb, gdp) + 1;
667 ext4_used_dirs_set(sb, gdp, count); 773 ext4_used_dirs_set(sb, gdp, count);
774 if (sbi->s_log_groups_per_flex) {
775 ext4_group_t f = ext4_flex_group(sbi, group);
776
777 atomic_inc(&sbi->s_flex_groups[f].free_inodes);
778 }
668 } 779 }
669 gdp->bg_checksum = ext4_group_desc_csum(sbi, group, gdp); 780 gdp->bg_checksum = ext4_group_desc_csum(sbi, group, gdp);
670err_ret: 781err_ret:
@@ -716,10 +827,10 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
716 sbi = EXT4_SB(sb); 827 sbi = EXT4_SB(sb);
717 es = sbi->s_es; 828 es = sbi->s_es;
718 829
719 if (sbi->s_log_groups_per_flex) { 830 if (sbi->s_log_groups_per_flex && test_opt(sb, OLDALLOC)) {
720 ret2 = find_group_flex(sb, dir, &group); 831 ret2 = find_group_flex(sb, dir, &group);
721 if (ret2 == -1) { 832 if (ret2 == -1) {
722 ret2 = find_group_other(sb, dir, &group); 833 ret2 = find_group_other(sb, dir, &group, mode);
723 if (ret2 == 0 && once) 834 if (ret2 == 0 && once)
724 once = 0; 835 once = 0;
725 printk(KERN_NOTICE "ext4: find_group_flex " 836 printk(KERN_NOTICE "ext4: find_group_flex "
@@ -733,11 +844,12 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
733 if (test_opt(sb, OLDALLOC)) 844 if (test_opt(sb, OLDALLOC))
734 ret2 = find_group_dir(sb, dir, &group); 845 ret2 = find_group_dir(sb, dir, &group);
735 else 846 else
736 ret2 = find_group_orlov(sb, dir, &group); 847 ret2 = find_group_orlov(sb, dir, &group, mode);
737 } else 848 } else
738 ret2 = find_group_other(sb, dir, &group); 849 ret2 = find_group_other(sb, dir, &group, mode);
739 850
740got_group: 851got_group:
852 EXT4_I(dir)->i_last_alloc_group = group;
741 err = -ENOSPC; 853 err = -ENOSPC;
742 if (ret2 == -1) 854 if (ret2 == -1)
743 goto out; 855 goto out;
@@ -858,9 +970,7 @@ got:
858 970
859 if (sbi->s_log_groups_per_flex) { 971 if (sbi->s_log_groups_per_flex) {
860 flex_group = ext4_flex_group(sbi, group); 972 flex_group = ext4_flex_group(sbi, group);
861 spin_lock(sb_bgl_lock(sbi, flex_group)); 973 atomic_dec(&sbi->s_flex_groups[flex_group].free_inodes);
862 sbi->s_flex_groups[flex_group].free_inodes--;
863 spin_unlock(sb_bgl_lock(sbi, flex_group));
864 } 974 }
865 975
866 inode->i_uid = current_fsuid(); 976 inode->i_uid = current_fsuid();
@@ -885,19 +995,16 @@ got:
885 ei->i_disksize = 0; 995 ei->i_disksize = 0;
886 996
887 /* 997 /*
888 * Don't inherit extent flag from directory. We set extent flag on 998 * Don't inherit extent flag from directory, amongst others. We set
889 * newly created directory and file only if -o extent mount option is 999 * extent flag on newly created directory and file only if -o extent
890 * specified 1000 * mount option is specified
891 */ 1001 */
892 ei->i_flags = EXT4_I(dir)->i_flags & ~(EXT4_INDEX_FL|EXT4_EXTENTS_FL); 1002 ei->i_flags =
893 if (S_ISLNK(mode)) 1003 ext4_mask_flags(mode, EXT4_I(dir)->i_flags & EXT4_FL_INHERITED);
894 ei->i_flags &= ~(EXT4_IMMUTABLE_FL|EXT4_APPEND_FL);
895 /* dirsync only applies to directories */
896 if (!S_ISDIR(mode))
897 ei->i_flags &= ~EXT4_DIRSYNC_FL;
898 ei->i_file_acl = 0; 1004 ei->i_file_acl = 0;
899 ei->i_dtime = 0; 1005 ei->i_dtime = 0;
900 ei->i_block_group = group; 1006 ei->i_block_group = group;
1007 ei->i_last_alloc_group = ~0;
901 1008
902 ext4_set_inode_flags(inode); 1009 ext4_set_inode_flags(inode);
903 if (IS_DIRSYNC(inode)) 1010 if (IS_DIRSYNC(inode))
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index dd82ff390067..a2e7952bc5f9 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -371,6 +371,34 @@ static int ext4_block_to_path(struct inode *inode,
371 return n; 371 return n;
372} 372}
373 373
374static int __ext4_check_blockref(const char *function, struct inode *inode,
375 unsigned int *p, unsigned int max) {
376
377 unsigned int maxblocks = ext4_blocks_count(EXT4_SB(inode->i_sb)->s_es);
378 unsigned int *bref = p;
379 while (bref < p+max) {
380 if (unlikely(*bref >= maxblocks)) {
381 ext4_error(inode->i_sb, function,
382 "block reference %u >= max (%u) "
383 "in inode #%lu, offset=%d",
384 *bref, maxblocks,
385 inode->i_ino, (int)(bref-p));
386 return -EIO;
387 }
388 bref++;
389 }
390 return 0;
391}
392
393
394#define ext4_check_indirect_blockref(inode, bh) \
395 __ext4_check_blockref(__func__, inode, (__le32 *)(bh)->b_data, \
396 EXT4_ADDR_PER_BLOCK((inode)->i_sb))
397
398#define ext4_check_inode_blockref(inode) \
399 __ext4_check_blockref(__func__, inode, EXT4_I(inode)->i_data, \
400 EXT4_NDIR_BLOCKS)
401
374/** 402/**
375 * ext4_get_branch - read the chain of indirect blocks leading to data 403 * ext4_get_branch - read the chain of indirect blocks leading to data
376 * @inode: inode in question 404 * @inode: inode in question
@@ -415,9 +443,22 @@ static Indirect *ext4_get_branch(struct inode *inode, int depth,
415 if (!p->key) 443 if (!p->key)
416 goto no_block; 444 goto no_block;
417 while (--depth) { 445 while (--depth) {
418 bh = sb_bread(sb, le32_to_cpu(p->key)); 446 bh = sb_getblk(sb, le32_to_cpu(p->key));
419 if (!bh) 447 if (unlikely(!bh))
420 goto failure; 448 goto failure;
449
450 if (!bh_uptodate_or_lock(bh)) {
451 if (bh_submit_read(bh) < 0) {
452 put_bh(bh);
453 goto failure;
454 }
455 /* validate block references */
456 if (ext4_check_indirect_blockref(inode, bh)) {
457 put_bh(bh);
458 goto failure;
459 }
460 }
461
421 add_chain(++p, bh, (__le32 *)bh->b_data + *++offsets); 462 add_chain(++p, bh, (__le32 *)bh->b_data + *++offsets);
422 /* Reader: end */ 463 /* Reader: end */
423 if (!p->key) 464 if (!p->key)
@@ -459,6 +500,8 @@ static ext4_fsblk_t ext4_find_near(struct inode *inode, Indirect *ind)
459 ext4_fsblk_t bg_start; 500 ext4_fsblk_t bg_start;
460 ext4_fsblk_t last_block; 501 ext4_fsblk_t last_block;
461 ext4_grpblk_t colour; 502 ext4_grpblk_t colour;
503 ext4_group_t block_group;
504 int flex_size = ext4_flex_bg_size(EXT4_SB(inode->i_sb));
462 505
463 /* Try to find previous block */ 506 /* Try to find previous block */
464 for (p = ind->p - 1; p >= start; p--) { 507 for (p = ind->p - 1; p >= start; p--) {
@@ -474,9 +517,22 @@ static ext4_fsblk_t ext4_find_near(struct inode *inode, Indirect *ind)
474 * It is going to be referred to from the inode itself? OK, just put it 517 * It is going to be referred to from the inode itself? OK, just put it
475 * into the same cylinder group then. 518 * into the same cylinder group then.
476 */ 519 */
477 bg_start = ext4_group_first_block_no(inode->i_sb, ei->i_block_group); 520 block_group = ei->i_block_group;
521 if (flex_size >= EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME) {
522 block_group &= ~(flex_size-1);
523 if (S_ISREG(inode->i_mode))
524 block_group++;
525 }
526 bg_start = ext4_group_first_block_no(inode->i_sb, block_group);
478 last_block = ext4_blocks_count(EXT4_SB(inode->i_sb)->s_es) - 1; 527 last_block = ext4_blocks_count(EXT4_SB(inode->i_sb)->s_es) - 1;
479 528
529 /*
530 * If we are doing delayed allocation, we don't need take
531 * colour into account.
532 */
533 if (test_opt(inode->i_sb, DELALLOC))
534 return bg_start;
535
480 if (bg_start + EXT4_BLOCKS_PER_GROUP(inode->i_sb) <= last_block) 536 if (bg_start + EXT4_BLOCKS_PER_GROUP(inode->i_sb) <= last_block)
481 colour = (current->pid % 16) * 537 colour = (current->pid % 16) *
482 (EXT4_BLOCKS_PER_GROUP(inode->i_sb) / 16); 538 (EXT4_BLOCKS_PER_GROUP(inode->i_sb) / 16);
@@ -1052,9 +1108,16 @@ static void ext4_da_update_reserve_space(struct inode *inode, int used)
1052 /* 1108 /*
1053 * free those over-booking quota for metadata blocks 1109 * free those over-booking quota for metadata blocks
1054 */ 1110 */
1055
1056 if (mdb_free) 1111 if (mdb_free)
1057 vfs_dq_release_reservation_block(inode, mdb_free); 1112 vfs_dq_release_reservation_block(inode, mdb_free);
1113
1114 /*
1115 * If we have done all the pending block allocations and if
1116 * there aren't any writers on the inode, we can discard the
1117 * inode's preallocations.
1118 */
1119 if (!total && (atomic_read(&inode->i_writecount) == 0))
1120 ext4_discard_preallocations(inode);
1058} 1121}
1059 1122
1060/* 1123/*
@@ -1688,9 +1751,10 @@ static void ext4_da_page_release_reservation(struct page *page,
1688 1751
1689struct mpage_da_data { 1752struct mpage_da_data {
1690 struct inode *inode; 1753 struct inode *inode;
1691 struct buffer_head lbh; /* extent of blocks */ 1754 sector_t b_blocknr; /* start block number of extent */
1755 size_t b_size; /* size of extent */
1756 unsigned long b_state; /* state of the extent */
1692 unsigned long first_page, next_page; /* extent of pages */ 1757 unsigned long first_page, next_page; /* extent of pages */
1693 get_block_t *get_block;
1694 struct writeback_control *wbc; 1758 struct writeback_control *wbc;
1695 int io_done; 1759 int io_done;
1696 int pages_written; 1760 int pages_written;
@@ -1704,7 +1768,6 @@ struct mpage_da_data {
1704 * @mpd->inode: inode 1768 * @mpd->inode: inode
1705 * @mpd->first_page: first page of the extent 1769 * @mpd->first_page: first page of the extent
1706 * @mpd->next_page: page after the last page of the extent 1770 * @mpd->next_page: page after the last page of the extent
1707 * @mpd->get_block: the filesystem's block mapper function
1708 * 1771 *
1709 * By the time mpage_da_submit_io() is called we expect all blocks 1772 * By the time mpage_da_submit_io() is called we expect all blocks
1710 * to be allocated. this may be wrong if allocation failed. 1773 * to be allocated. this may be wrong if allocation failed.
@@ -1724,7 +1787,7 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd)
1724 /* 1787 /*
1725 * We need to start from the first_page to the next_page - 1 1788 * We need to start from the first_page to the next_page - 1
1726 * to make sure we also write the mapped dirty buffer_heads. 1789 * to make sure we also write the mapped dirty buffer_heads.
1727 * If we look at mpd->lbh.b_blocknr we would only be looking 1790 * If we look at mpd->b_blocknr we would only be looking
1728 * at the currently mapped buffer_heads. 1791 * at the currently mapped buffer_heads.
1729 */ 1792 */
1730 index = mpd->first_page; 1793 index = mpd->first_page;
@@ -1914,68 +1977,111 @@ static void ext4_print_free_blocks(struct inode *inode)
1914 return; 1977 return;
1915} 1978}
1916 1979
1980#define EXT4_DELALLOC_RSVED 1
1981static int ext4_da_get_block_write(struct inode *inode, sector_t iblock,
1982 struct buffer_head *bh_result, int create)
1983{
1984 int ret;
1985 unsigned max_blocks = bh_result->b_size >> inode->i_blkbits;
1986 loff_t disksize = EXT4_I(inode)->i_disksize;
1987 handle_t *handle = NULL;
1988
1989 handle = ext4_journal_current_handle();
1990 BUG_ON(!handle);
1991 ret = ext4_get_blocks_wrap(handle, inode, iblock, max_blocks,
1992 bh_result, create, 0, EXT4_DELALLOC_RSVED);
1993 if (ret <= 0)
1994 return ret;
1995
1996 bh_result->b_size = (ret << inode->i_blkbits);
1997
1998 if (ext4_should_order_data(inode)) {
1999 int retval;
2000 retval = ext4_jbd2_file_inode(handle, inode);
2001 if (retval)
2002 /*
2003 * Failed to add inode for ordered mode. Don't
2004 * update file size
2005 */
2006 return retval;
2007 }
2008
2009 /*
2010 * Update on-disk size along with block allocation we don't
2011 * use 'extend_disksize' as size may change within already
2012 * allocated block -bzzz
2013 */
2014 disksize = ((loff_t) iblock + ret) << inode->i_blkbits;
2015 if (disksize > i_size_read(inode))
2016 disksize = i_size_read(inode);
2017 if (disksize > EXT4_I(inode)->i_disksize) {
2018 ext4_update_i_disksize(inode, disksize);
2019 ret = ext4_mark_inode_dirty(handle, inode);
2020 return ret;
2021 }
2022 return 0;
2023}
2024
1917/* 2025/*
1918 * mpage_da_map_blocks - go through given space 2026 * mpage_da_map_blocks - go through given space
1919 * 2027 *
1920 * @mpd->lbh - bh describing space 2028 * @mpd - bh describing space
1921 * @mpd->get_block - the filesystem's block mapper function
1922 * 2029 *
1923 * The function skips space we know is already mapped to disk blocks. 2030 * The function skips space we know is already mapped to disk blocks.
1924 * 2031 *
1925 */ 2032 */
1926static int mpage_da_map_blocks(struct mpage_da_data *mpd) 2033static int mpage_da_map_blocks(struct mpage_da_data *mpd)
1927{ 2034{
1928 int err = 0; 2035 int err = 0;
1929 struct buffer_head new; 2036 struct buffer_head new;
1930 struct buffer_head *lbh = &mpd->lbh;
1931 sector_t next; 2037 sector_t next;
1932 2038
1933 /* 2039 /*
1934 * We consider only non-mapped and non-allocated blocks 2040 * We consider only non-mapped and non-allocated blocks
1935 */ 2041 */
1936 if (buffer_mapped(lbh) && !buffer_delay(lbh)) 2042 if ((mpd->b_state & (1 << BH_Mapped)) &&
2043 !(mpd->b_state & (1 << BH_Delay)))
1937 return 0; 2044 return 0;
1938 new.b_state = lbh->b_state; 2045 new.b_state = mpd->b_state;
1939 new.b_blocknr = 0; 2046 new.b_blocknr = 0;
1940 new.b_size = lbh->b_size; 2047 new.b_size = mpd->b_size;
1941 next = lbh->b_blocknr; 2048 next = mpd->b_blocknr;
1942 /* 2049 /*
1943 * If we didn't accumulate anything 2050 * If we didn't accumulate anything
1944 * to write simply return 2051 * to write simply return
1945 */ 2052 */
1946 if (!new.b_size) 2053 if (!new.b_size)
1947 return 0; 2054 return 0;
1948 err = mpd->get_block(mpd->inode, next, &new, 1);
1949 if (err) {
1950 2055
1951 /* If get block returns with error 2056 err = ext4_da_get_block_write(mpd->inode, next, &new, 1);
1952 * we simply return. Later writepage 2057 if (err) {
1953 * will redirty the page and writepages 2058 /*
1954 * will find the dirty page again 2059 * If get block returns with error we simply
2060 * return. Later writepage will redirty the page and
2061 * writepages will find the dirty page again
1955 */ 2062 */
1956 if (err == -EAGAIN) 2063 if (err == -EAGAIN)
1957 return 0; 2064 return 0;
1958 2065
1959 if (err == -ENOSPC && 2066 if (err == -ENOSPC &&
1960 ext4_count_free_blocks(mpd->inode->i_sb)) { 2067 ext4_count_free_blocks(mpd->inode->i_sb)) {
1961 mpd->retval = err; 2068 mpd->retval = err;
1962 return 0; 2069 return 0;
1963 } 2070 }
1964 2071
1965 /* 2072 /*
1966 * get block failure will cause us 2073 * get block failure will cause us to loop in
1967 * to loop in writepages. Because 2074 * writepages, because a_ops->writepage won't be able
1968 * a_ops->writepage won't be able to 2075 * to make progress. The page will be redirtied by
1969 * make progress. The page will be redirtied 2076 * writepage and writepages will again try to write
1970 * by writepage and writepages will again 2077 * the same.
1971 * try to write the same.
1972 */ 2078 */
1973 printk(KERN_EMERG "%s block allocation failed for inode %lu " 2079 printk(KERN_EMERG "%s block allocation failed for inode %lu "
1974 "at logical offset %llu with max blocks " 2080 "at logical offset %llu with max blocks "
1975 "%zd with error %d\n", 2081 "%zd with error %d\n",
1976 __func__, mpd->inode->i_ino, 2082 __func__, mpd->inode->i_ino,
1977 (unsigned long long)next, 2083 (unsigned long long)next,
1978 lbh->b_size >> mpd->inode->i_blkbits, err); 2084 mpd->b_size >> mpd->inode->i_blkbits, err);
1979 printk(KERN_EMERG "This should not happen.!! " 2085 printk(KERN_EMERG "This should not happen.!! "
1980 "Data will be lost\n"); 2086 "Data will be lost\n");
1981 if (err == -ENOSPC) { 2087 if (err == -ENOSPC) {
@@ -1983,7 +2089,7 @@ static int mpage_da_map_blocks(struct mpage_da_data *mpd)
1983 } 2089 }
1984 /* invlaidate all the pages */ 2090 /* invlaidate all the pages */
1985 ext4_da_block_invalidatepages(mpd, next, 2091 ext4_da_block_invalidatepages(mpd, next,
1986 lbh->b_size >> mpd->inode->i_blkbits); 2092 mpd->b_size >> mpd->inode->i_blkbits);
1987 return err; 2093 return err;
1988 } 2094 }
1989 BUG_ON(new.b_size == 0); 2095 BUG_ON(new.b_size == 0);
@@ -1995,7 +2101,8 @@ static int mpage_da_map_blocks(struct mpage_da_data *mpd)
1995 * If blocks are delayed marked, we need to 2101 * If blocks are delayed marked, we need to
1996 * put actual blocknr and drop delayed bit 2102 * put actual blocknr and drop delayed bit
1997 */ 2103 */
1998 if (buffer_delay(lbh) || buffer_unwritten(lbh)) 2104 if ((mpd->b_state & (1 << BH_Delay)) ||
2105 (mpd->b_state & (1 << BH_Unwritten)))
1999 mpage_put_bnr_to_bhs(mpd, next, &new); 2106 mpage_put_bnr_to_bhs(mpd, next, &new);
2000 2107
2001 return 0; 2108 return 0;
@@ -2014,12 +2121,11 @@ static int mpage_da_map_blocks(struct mpage_da_data *mpd)
2014 * the function is used to collect contig. blocks in same state 2121 * the function is used to collect contig. blocks in same state
2015 */ 2122 */
2016static void mpage_add_bh_to_extent(struct mpage_da_data *mpd, 2123static void mpage_add_bh_to_extent(struct mpage_da_data *mpd,
2017 sector_t logical, struct buffer_head *bh) 2124 sector_t logical, size_t b_size,
2125 unsigned long b_state)
2018{ 2126{
2019 sector_t next; 2127 sector_t next;
2020 size_t b_size = bh->b_size; 2128 int nrblocks = mpd->b_size >> mpd->inode->i_blkbits;
2021 struct buffer_head *lbh = &mpd->lbh;
2022 int nrblocks = lbh->b_size >> mpd->inode->i_blkbits;
2023 2129
2024 /* check if thereserved journal credits might overflow */ 2130 /* check if thereserved journal credits might overflow */
2025 if (!(EXT4_I(mpd->inode)->i_flags & EXT4_EXTENTS_FL)) { 2131 if (!(EXT4_I(mpd->inode)->i_flags & EXT4_EXTENTS_FL)) {
@@ -2046,19 +2152,19 @@ static void mpage_add_bh_to_extent(struct mpage_da_data *mpd,
2046 /* 2152 /*
2047 * First block in the extent 2153 * First block in the extent
2048 */ 2154 */
2049 if (lbh->b_size == 0) { 2155 if (mpd->b_size == 0) {
2050 lbh->b_blocknr = logical; 2156 mpd->b_blocknr = logical;
2051 lbh->b_size = b_size; 2157 mpd->b_size = b_size;
2052 lbh->b_state = bh->b_state & BH_FLAGS; 2158 mpd->b_state = b_state & BH_FLAGS;
2053 return; 2159 return;
2054 } 2160 }
2055 2161
2056 next = lbh->b_blocknr + nrblocks; 2162 next = mpd->b_blocknr + nrblocks;
2057 /* 2163 /*
2058 * Can we merge the block to our big extent? 2164 * Can we merge the block to our big extent?
2059 */ 2165 */
2060 if (logical == next && (bh->b_state & BH_FLAGS) == lbh->b_state) { 2166 if (logical == next && (b_state & BH_FLAGS) == mpd->b_state) {
2061 lbh->b_size += b_size; 2167 mpd->b_size += b_size;
2062 return; 2168 return;
2063 } 2169 }
2064 2170
@@ -2087,7 +2193,7 @@ static int __mpage_da_writepage(struct page *page,
2087{ 2193{
2088 struct mpage_da_data *mpd = data; 2194 struct mpage_da_data *mpd = data;
2089 struct inode *inode = mpd->inode; 2195 struct inode *inode = mpd->inode;
2090 struct buffer_head *bh, *head, fake; 2196 struct buffer_head *bh, *head;
2091 sector_t logical; 2197 sector_t logical;
2092 2198
2093 if (mpd->io_done) { 2199 if (mpd->io_done) {
@@ -2129,9 +2235,9 @@ static int __mpage_da_writepage(struct page *page,
2129 /* 2235 /*
2130 * ... and blocks 2236 * ... and blocks
2131 */ 2237 */
2132 mpd->lbh.b_size = 0; 2238 mpd->b_size = 0;
2133 mpd->lbh.b_state = 0; 2239 mpd->b_state = 0;
2134 mpd->lbh.b_blocknr = 0; 2240 mpd->b_blocknr = 0;
2135 } 2241 }
2136 2242
2137 mpd->next_page = page->index + 1; 2243 mpd->next_page = page->index + 1;
@@ -2139,16 +2245,8 @@ static int __mpage_da_writepage(struct page *page,
2139 (PAGE_CACHE_SHIFT - inode->i_blkbits); 2245 (PAGE_CACHE_SHIFT - inode->i_blkbits);
2140 2246
2141 if (!page_has_buffers(page)) { 2247 if (!page_has_buffers(page)) {
2142 /* 2248 mpage_add_bh_to_extent(mpd, logical, PAGE_CACHE_SIZE,
2143 * There is no attached buffer heads yet (mmap?) 2249 (1 << BH_Dirty) | (1 << BH_Uptodate));
2144 * we treat the page asfull of dirty blocks
2145 */
2146 bh = &fake;
2147 bh->b_size = PAGE_CACHE_SIZE;
2148 bh->b_state = 0;
2149 set_buffer_dirty(bh);
2150 set_buffer_uptodate(bh);
2151 mpage_add_bh_to_extent(mpd, logical, bh);
2152 if (mpd->io_done) 2250 if (mpd->io_done)
2153 return MPAGE_DA_EXTENT_TAIL; 2251 return MPAGE_DA_EXTENT_TAIL;
2154 } else { 2252 } else {
@@ -2166,8 +2264,10 @@ static int __mpage_da_writepage(struct page *page,
2166 * with the page in ext4_da_writepage 2264 * with the page in ext4_da_writepage
2167 */ 2265 */
2168 if (buffer_dirty(bh) && 2266 if (buffer_dirty(bh) &&
2169 (!buffer_mapped(bh) || buffer_delay(bh))) { 2267 (!buffer_mapped(bh) || buffer_delay(bh))) {
2170 mpage_add_bh_to_extent(mpd, logical, bh); 2268 mpage_add_bh_to_extent(mpd, logical,
2269 bh->b_size,
2270 bh->b_state);
2171 if (mpd->io_done) 2271 if (mpd->io_done)
2172 return MPAGE_DA_EXTENT_TAIL; 2272 return MPAGE_DA_EXTENT_TAIL;
2173 } else if (buffer_dirty(bh) && (buffer_mapped(bh))) { 2273 } else if (buffer_dirty(bh) && (buffer_mapped(bh))) {
@@ -2179,9 +2279,8 @@ static int __mpage_da_writepage(struct page *page,
2179 * unmapped buffer_head later we need to 2279 * unmapped buffer_head later we need to
2180 * use the b_state flag of that buffer_head. 2280 * use the b_state flag of that buffer_head.
2181 */ 2281 */
2182 if (mpd->lbh.b_size == 0) 2282 if (mpd->b_size == 0)
2183 mpd->lbh.b_state = 2283 mpd->b_state = bh->b_state & BH_FLAGS;
2184 bh->b_state & BH_FLAGS;
2185 } 2284 }
2186 logical++; 2285 logical++;
2187 } while ((bh = bh->b_this_page) != head); 2286 } while ((bh = bh->b_this_page) != head);
@@ -2191,51 +2290,6 @@ static int __mpage_da_writepage(struct page *page,
2191} 2290}
2192 2291
2193/* 2292/*
2194 * mpage_da_writepages - walk the list of dirty pages of the given
2195 * address space, allocates non-allocated blocks, maps newly-allocated
2196 * blocks to existing bhs and issue IO them
2197 *
2198 * @mapping: address space structure to write
2199 * @wbc: subtract the number of written pages from *@wbc->nr_to_write
2200 * @get_block: the filesystem's block mapper function.
2201 *
2202 * This is a library function, which implements the writepages()
2203 * address_space_operation.
2204 */
2205static int mpage_da_writepages(struct address_space *mapping,
2206 struct writeback_control *wbc,
2207 struct mpage_da_data *mpd)
2208{
2209 int ret;
2210
2211 if (!mpd->get_block)
2212 return generic_writepages(mapping, wbc);
2213
2214 mpd->lbh.b_size = 0;
2215 mpd->lbh.b_state = 0;
2216 mpd->lbh.b_blocknr = 0;
2217 mpd->first_page = 0;
2218 mpd->next_page = 0;
2219 mpd->io_done = 0;
2220 mpd->pages_written = 0;
2221 mpd->retval = 0;
2222
2223 ret = write_cache_pages(mapping, wbc, __mpage_da_writepage, mpd);
2224 /*
2225 * Handle last extent of pages
2226 */
2227 if (!mpd->io_done && mpd->next_page != mpd->first_page) {
2228 if (mpage_da_map_blocks(mpd) == 0)
2229 mpage_da_submit_io(mpd);
2230
2231 mpd->io_done = 1;
2232 ret = MPAGE_DA_EXTENT_TAIL;
2233 }
2234 wbc->nr_to_write -= mpd->pages_written;
2235 return ret;
2236}
2237
2238/*
2239 * this is a special callback for ->write_begin() only 2293 * this is a special callback for ->write_begin() only
2240 * it's intention is to return mapped block or reserve space 2294 * it's intention is to return mapped block or reserve space
2241 */ 2295 */
@@ -2274,51 +2328,6 @@ static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
2274 2328
2275 return ret; 2329 return ret;
2276} 2330}
2277#define EXT4_DELALLOC_RSVED 1
2278static int ext4_da_get_block_write(struct inode *inode, sector_t iblock,
2279 struct buffer_head *bh_result, int create)
2280{
2281 int ret;
2282 unsigned max_blocks = bh_result->b_size >> inode->i_blkbits;
2283 loff_t disksize = EXT4_I(inode)->i_disksize;
2284 handle_t *handle = NULL;
2285
2286 handle = ext4_journal_current_handle();
2287 BUG_ON(!handle);
2288 ret = ext4_get_blocks_wrap(handle, inode, iblock, max_blocks,
2289 bh_result, create, 0, EXT4_DELALLOC_RSVED);
2290 if (ret > 0) {
2291
2292 bh_result->b_size = (ret << inode->i_blkbits);
2293
2294 if (ext4_should_order_data(inode)) {
2295 int retval;
2296 retval = ext4_jbd2_file_inode(handle, inode);
2297 if (retval)
2298 /*
2299 * Failed to add inode for ordered
2300 * mode. Don't update file size
2301 */
2302 return retval;
2303 }
2304
2305 /*
2306 * Update on-disk size along with block allocation
2307 * we don't use 'extend_disksize' as size may change
2308 * within already allocated block -bzzz
2309 */
2310 disksize = ((loff_t) iblock + ret) << inode->i_blkbits;
2311 if (disksize > i_size_read(inode))
2312 disksize = i_size_read(inode);
2313 if (disksize > EXT4_I(inode)->i_disksize) {
2314 ext4_update_i_disksize(inode, disksize);
2315 ret = ext4_mark_inode_dirty(handle, inode);
2316 return ret;
2317 }
2318 ret = 0;
2319 }
2320 return ret;
2321}
2322 2331
2323static int ext4_bh_unmapped_or_delay(handle_t *handle, struct buffer_head *bh) 2332static int ext4_bh_unmapped_or_delay(handle_t *handle, struct buffer_head *bh)
2324{ 2333{
@@ -2569,8 +2578,38 @@ retry:
2569 dump_stack(); 2578 dump_stack();
2570 goto out_writepages; 2579 goto out_writepages;
2571 } 2580 }
2572 mpd.get_block = ext4_da_get_block_write; 2581
2573 ret = mpage_da_writepages(mapping, wbc, &mpd); 2582 /*
2583 * Now call __mpage_da_writepage to find the next
2584 * contiguous region of logical blocks that need
2585 * blocks to be allocated by ext4. We don't actually
2586 * submit the blocks for I/O here, even though
2587 * write_cache_pages thinks it will, and will set the
2588 * pages as clean for write before calling
2589 * __mpage_da_writepage().
2590 */
2591 mpd.b_size = 0;
2592 mpd.b_state = 0;
2593 mpd.b_blocknr = 0;
2594 mpd.first_page = 0;
2595 mpd.next_page = 0;
2596 mpd.io_done = 0;
2597 mpd.pages_written = 0;
2598 mpd.retval = 0;
2599 ret = write_cache_pages(mapping, wbc, __mpage_da_writepage,
2600 &mpd);
2601 /*
2602 * If we have a contigous extent of pages and we
2603 * haven't done the I/O yet, map the blocks and submit
2604 * them for I/O.
2605 */
2606 if (!mpd.io_done && mpd.next_page != mpd.first_page) {
2607 if (mpage_da_map_blocks(&mpd) == 0)
2608 mpage_da_submit_io(&mpd);
2609 mpd.io_done = 1;
2610 ret = MPAGE_DA_EXTENT_TAIL;
2611 }
2612 wbc->nr_to_write -= mpd.pages_written;
2574 2613
2575 ext4_journal_stop(handle); 2614 ext4_journal_stop(handle);
2576 2615
@@ -2846,6 +2885,48 @@ out:
2846 return; 2885 return;
2847} 2886}
2848 2887
2888/*
2889 * Force all delayed allocation blocks to be allocated for a given inode.
2890 */
2891int ext4_alloc_da_blocks(struct inode *inode)
2892{
2893 if (!EXT4_I(inode)->i_reserved_data_blocks &&
2894 !EXT4_I(inode)->i_reserved_meta_blocks)
2895 return 0;
2896
2897 /*
2898 * We do something simple for now. The filemap_flush() will
2899 * also start triggering a write of the data blocks, which is
2900 * not strictly speaking necessary (and for users of
2901 * laptop_mode, not even desirable). However, to do otherwise
2902 * would require replicating code paths in:
2903 *
2904 * ext4_da_writepages() ->
2905 * write_cache_pages() ---> (via passed in callback function)
2906 * __mpage_da_writepage() -->
2907 * mpage_add_bh_to_extent()
2908 * mpage_da_map_blocks()
2909 *
2910 * The problem is that write_cache_pages(), located in
2911 * mm/page-writeback.c, marks pages clean in preparation for
2912 * doing I/O, which is not desirable if we're not planning on
2913 * doing I/O at all.
2914 *
2915 * We could call write_cache_pages(), and then redirty all of
2916 * the pages by calling redirty_page_for_writeback() but that
2917 * would be ugly in the extreme. So instead we would need to
2918 * replicate parts of the code in the above functions,
2919 * simplifying them becuase we wouldn't actually intend to
2920 * write out the pages, but rather only collect contiguous
2921 * logical block extents, call the multi-block allocator, and
2922 * then update the buffer heads with the block allocations.
2923 *
2924 * For now, though, we'll cheat by calling filemap_flush(),
2925 * which will map the blocks, and start the I/O, but not
2926 * actually wait for the I/O to complete.
2927 */
2928 return filemap_flush(inode->i_mapping);
2929}
2849 2930
2850/* 2931/*
2851 * bmap() is special. It gets used by applications such as lilo and by 2932 * bmap() is special. It gets used by applications such as lilo and by
@@ -3868,6 +3949,9 @@ void ext4_truncate(struct inode *inode)
3868 if (!ext4_can_truncate(inode)) 3949 if (!ext4_can_truncate(inode))
3869 return; 3950 return;
3870 3951
3952 if (inode->i_size == 0 && !test_opt(inode->i_sb, NO_AUTO_DA_ALLOC))
3953 ei->i_state |= EXT4_STATE_DA_ALLOC_CLOSE;
3954
3871 if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) { 3955 if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) {
3872 ext4_ext_truncate(inode); 3956 ext4_ext_truncate(inode);
3873 return; 3957 return;
@@ -4110,12 +4194,7 @@ make_io:
4110 unsigned num; 4194 unsigned num;
4111 4195
4112 table = ext4_inode_table(sb, gdp); 4196 table = ext4_inode_table(sb, gdp);
4113 /* Make sure s_inode_readahead_blks is a power of 2 */ 4197 /* s_inode_readahead_blks is always a power of 2 */
4114 while (EXT4_SB(sb)->s_inode_readahead_blks &
4115 (EXT4_SB(sb)->s_inode_readahead_blks-1))
4116 EXT4_SB(sb)->s_inode_readahead_blks =
4117 (EXT4_SB(sb)->s_inode_readahead_blks &
4118 (EXT4_SB(sb)->s_inode_readahead_blks-1));
4119 b = block & ~(EXT4_SB(sb)->s_inode_readahead_blks-1); 4198 b = block & ~(EXT4_SB(sb)->s_inode_readahead_blks-1);
4120 if (table > b) 4199 if (table > b)
4121 b = table; 4200 b = table;
@@ -4287,6 +4366,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
4287 ei->i_disksize = inode->i_size; 4366 ei->i_disksize = inode->i_size;
4288 inode->i_generation = le32_to_cpu(raw_inode->i_generation); 4367 inode->i_generation = le32_to_cpu(raw_inode->i_generation);
4289 ei->i_block_group = iloc.block_group; 4368 ei->i_block_group = iloc.block_group;
4369 ei->i_last_alloc_group = ~0;
4290 /* 4370 /*
4291 * NOTE! The in-memory inode i_data array is in little-endian order 4371 * NOTE! The in-memory inode i_data array is in little-endian order
4292 * even on big-endian machines: we do NOT byteswap the block numbers! 4372 * even on big-endian machines: we do NOT byteswap the block numbers!
@@ -4329,6 +4409,20 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
4329 (__u64)(le32_to_cpu(raw_inode->i_version_hi)) << 32; 4409 (__u64)(le32_to_cpu(raw_inode->i_version_hi)) << 32;
4330 } 4410 }
4331 4411
4412 if (ei->i_flags & EXT4_EXTENTS_FL) {
4413 /* Validate extent which is part of inode */
4414 ret = ext4_ext_check_inode(inode);
4415 } else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
4416 (S_ISLNK(inode->i_mode) &&
4417 !ext4_inode_is_fast_symlink(inode))) {
4418 /* Validate block references which are part of inode */
4419 ret = ext4_check_inode_blockref(inode);
4420 }
4421 if (ret) {
4422 brelse(bh);
4423 goto bad_inode;
4424 }
4425
4332 if (S_ISREG(inode->i_mode)) { 4426 if (S_ISREG(inode->i_mode)) {
4333 inode->i_op = &ext4_file_inode_operations; 4427 inode->i_op = &ext4_file_inode_operations;
4334 inode->i_fop = &ext4_file_operations; 4428 inode->i_fop = &ext4_file_operations;
@@ -4345,7 +4439,8 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
4345 inode->i_op = &ext4_symlink_inode_operations; 4439 inode->i_op = &ext4_symlink_inode_operations;
4346 ext4_set_aops(inode); 4440 ext4_set_aops(inode);
4347 } 4441 }
4348 } else { 4442 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
4443 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
4349 inode->i_op = &ext4_special_inode_operations; 4444 inode->i_op = &ext4_special_inode_operations;
4350 if (raw_inode->i_block[0]) 4445 if (raw_inode->i_block[0])
4351 init_special_inode(inode, inode->i_mode, 4446 init_special_inode(inode, inode->i_mode,
@@ -4353,6 +4448,13 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
4353 else 4448 else
4354 init_special_inode(inode, inode->i_mode, 4449 init_special_inode(inode, inode->i_mode,
4355 new_decode_dev(le32_to_cpu(raw_inode->i_block[1]))); 4450 new_decode_dev(le32_to_cpu(raw_inode->i_block[1])));
4451 } else {
4452 brelse(bh);
4453 ret = -EIO;
4454 ext4_error(inode->i_sb, __func__,
4455 "bogus i_mode (%o) for inode=%lu",
4456 inode->i_mode, inode->i_ino);
4457 goto bad_inode;
4356 } 4458 }
4357 brelse(iloc.bh); 4459 brelse(iloc.bh);
4358 ext4_set_inode_flags(inode); 4460 ext4_set_inode_flags(inode);
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 42dc83fb247a..91e75f7a9e73 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -48,8 +48,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
48 if (err) 48 if (err)
49 return err; 49 return err;
50 50
51 if (!S_ISDIR(inode->i_mode)) 51 flags = ext4_mask_flags(inode->i_mode, flags);
52 flags &= ~EXT4_DIRSYNC_FL;
53 52
54 err = -EPERM; 53 err = -EPERM;
55 mutex_lock(&inode->i_mutex); 54 mutex_lock(&inode->i_mutex);
@@ -263,6 +262,20 @@ setversion_out:
263 return err; 262 return err;
264 } 263 }
265 264
265 case EXT4_IOC_ALLOC_DA_BLKS:
266 {
267 int err;
268 if (!is_owner_or_cap(inode))
269 return -EACCES;
270
271 err = mnt_want_write(filp->f_path.mnt);
272 if (err)
273 return err;
274 err = ext4_alloc_da_blocks(inode);
275 mnt_drop_write(filp->f_path.mnt);
276 return err;
277 }
278
266 default: 279 default:
267 return -ENOTTY; 280 return -ENOTTY;
268 } 281 }
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index b038188bd039..f871677a7984 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -46,22 +46,23 @@
46 * The allocation request involve request for multiple number of blocks 46 * The allocation request involve request for multiple number of blocks
47 * near to the goal(block) value specified. 47 * near to the goal(block) value specified.
48 * 48 *
49 * During initialization phase of the allocator we decide to use the group 49 * During initialization phase of the allocator we decide to use the
50 * preallocation or inode preallocation depending on the size file. The 50 * group preallocation or inode preallocation depending on the size of
51 * size of the file could be the resulting file size we would have after 51 * the file. The size of the file could be the resulting file size we
52 * allocation or the current file size which ever is larger. If the size is 52 * would have after allocation, or the current file size, which ever
53 * less that sbi->s_mb_stream_request we select the group 53 * is larger. If the size is less than sbi->s_mb_stream_request we
54 * preallocation. The default value of s_mb_stream_request is 16 54 * select to use the group preallocation. The default value of
55 * blocks. This can also be tuned via 55 * s_mb_stream_request is 16 blocks. This can also be tuned via
56 * /proc/fs/ext4/<partition>/stream_req. The value is represented in terms 56 * /sys/fs/ext4/<partition>/mb_stream_req. The value is represented in
57 * of number of blocks. 57 * terms of number of blocks.
58 * 58 *
59 * The main motivation for having small file use group preallocation is to 59 * The main motivation for having small file use group preallocation is to
60 * ensure that we have small file closer in the disk. 60 * ensure that we have small files closer together on the disk.
61 * 61 *
62 * First stage the allocator looks at the inode prealloc list 62 * First stage the allocator looks at the inode prealloc list,
63 * ext4_inode_info->i_prealloc_list contain list of prealloc spaces for 63 * ext4_inode_info->i_prealloc_list, which contains list of prealloc
64 * this particular inode. The inode prealloc space is represented as: 64 * spaces for this particular inode. The inode prealloc space is
65 * represented as:
65 * 66 *
66 * pa_lstart -> the logical start block for this prealloc space 67 * pa_lstart -> the logical start block for this prealloc space
67 * pa_pstart -> the physical start block for this prealloc space 68 * pa_pstart -> the physical start block for this prealloc space
@@ -121,29 +122,29 @@
121 * list. In case of inode preallocation we follow a list of heuristics 122 * list. In case of inode preallocation we follow a list of heuristics
122 * based on file size. This can be found in ext4_mb_normalize_request. If 123 * based on file size. This can be found in ext4_mb_normalize_request. If
123 * we are doing a group prealloc we try to normalize the request to 124 * we are doing a group prealloc we try to normalize the request to
124 * sbi->s_mb_group_prealloc. Default value of s_mb_group_prealloc is set to 125 * sbi->s_mb_group_prealloc. Default value of s_mb_group_prealloc is
125 * 512 blocks. This can be tuned via 126 * 512 blocks. This can be tuned via
126 * /proc/fs/ext4/<partition/group_prealloc. The value is represented in 127 * /sys/fs/ext4/<partition/mb_group_prealloc. The value is represented in
127 * terms of number of blocks. If we have mounted the file system with -O 128 * terms of number of blocks. If we have mounted the file system with -O
128 * stripe=<value> option the group prealloc request is normalized to the 129 * stripe=<value> option the group prealloc request is normalized to the
129 * stripe value (sbi->s_stripe) 130 * stripe value (sbi->s_stripe)
130 * 131 *
131 * The regular allocator(using the buddy cache) support few tunables. 132 * The regular allocator(using the buddy cache) supports few tunables.
132 * 133 *
133 * /proc/fs/ext4/<partition>/min_to_scan 134 * /sys/fs/ext4/<partition>/mb_min_to_scan
134 * /proc/fs/ext4/<partition>/max_to_scan 135 * /sys/fs/ext4/<partition>/mb_max_to_scan
135 * /proc/fs/ext4/<partition>/order2_req 136 * /sys/fs/ext4/<partition>/mb_order2_req
136 * 137 *
137 * The regular allocator use buddy scan only if the request len is power of 138 * The regular allocator uses buddy scan only if the request len is power of
138 * 2 blocks and the order of allocation is >= sbi->s_mb_order2_reqs. The 139 * 2 blocks and the order of allocation is >= sbi->s_mb_order2_reqs. The
139 * value of s_mb_order2_reqs can be tuned via 140 * value of s_mb_order2_reqs can be tuned via
140 * /proc/fs/ext4/<partition>/order2_req. If the request len is equal to 141 * /sys/fs/ext4/<partition>/mb_order2_req. If the request len is equal to
141 * stripe size (sbi->s_stripe), we try to search for contigous block in 142 * stripe size (sbi->s_stripe), we try to search for contigous block in
142 * stripe size. This should result in better allocation on RAID setup. If 143 * stripe size. This should result in better allocation on RAID setups. If
143 * not we search in the specific group using bitmap for best extents. The 144 * not, we search in the specific group using bitmap for best extents. The
144 * tunable min_to_scan and max_to_scan controll the behaviour here. 145 * tunable min_to_scan and max_to_scan control the behaviour here.
145 * min_to_scan indicate how long the mballoc __must__ look for a best 146 * min_to_scan indicate how long the mballoc __must__ look for a best
146 * extent and max_to_scanindicate how long the mballoc __can__ look for a 147 * extent and max_to_scan indicates how long the mballoc __can__ look for a
147 * best extent in the found extents. Searching for the blocks starts with 148 * best extent in the found extents. Searching for the blocks starts with
148 * the group specified as the goal value in allocation context via 149 * the group specified as the goal value in allocation context via
149 * ac_g_ex. Each group is first checked based on the criteria whether it 150 * ac_g_ex. Each group is first checked based on the criteria whether it
@@ -337,8 +338,6 @@ static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap,
337 ext4_group_t group); 338 ext4_group_t group);
338static void ext4_mb_generate_from_freelist(struct super_block *sb, void *bitmap, 339static void ext4_mb_generate_from_freelist(struct super_block *sb, void *bitmap,
339 ext4_group_t group); 340 ext4_group_t group);
340static int ext4_mb_init_per_dev_proc(struct super_block *sb);
341static int ext4_mb_destroy_per_dev_proc(struct super_block *sb);
342static void release_blocks_on_commit(journal_t *journal, transaction_t *txn); 341static void release_blocks_on_commit(journal_t *journal, transaction_t *txn);
343 342
344 343
@@ -1726,6 +1725,7 @@ static int ext4_mb_good_group(struct ext4_allocation_context *ac,
1726{ 1725{
1727 unsigned free, fragments; 1726 unsigned free, fragments;
1728 unsigned i, bits; 1727 unsigned i, bits;
1728 int flex_size = ext4_flex_bg_size(EXT4_SB(ac->ac_sb));
1729 struct ext4_group_desc *desc; 1729 struct ext4_group_desc *desc;
1730 struct ext4_group_info *grp = ext4_get_group_info(ac->ac_sb, group); 1730 struct ext4_group_info *grp = ext4_get_group_info(ac->ac_sb, group);
1731 1731
@@ -1747,6 +1747,12 @@ static int ext4_mb_good_group(struct ext4_allocation_context *ac,
1747 if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) 1747 if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))
1748 return 0; 1748 return 0;
1749 1749
1750 /* Avoid using the first bg of a flexgroup for data files */
1751 if ((ac->ac_flags & EXT4_MB_HINT_DATA) &&
1752 (flex_size >= EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME) &&
1753 ((group % flex_size) == 0))
1754 return 0;
1755
1750 bits = ac->ac_sb->s_blocksize_bits + 1; 1756 bits = ac->ac_sb->s_blocksize_bits + 1;
1751 for (i = ac->ac_2order; i <= bits; i++) 1757 for (i = ac->ac_2order; i <= bits; i++)
1752 if (grp->bb_counters[i] > 0) 1758 if (grp->bb_counters[i] > 0)
@@ -1971,7 +1977,7 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
1971 /* 1977 /*
1972 * We search using buddy data only if the order of the request 1978 * We search using buddy data only if the order of the request
1973 * is greater than equal to the sbi_s_mb_order2_reqs 1979 * is greater than equal to the sbi_s_mb_order2_reqs
1974 * You can tune it via /proc/fs/ext4/<partition>/order2_req 1980 * You can tune it via /sys/fs/ext4/<partition>/mb_order2_req
1975 */ 1981 */
1976 if (i >= sbi->s_mb_order2_reqs) { 1982 if (i >= sbi->s_mb_order2_reqs) {
1977 /* 1983 /*
@@ -2693,7 +2699,7 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery)
2693 i = (sb->s_blocksize_bits + 2) * sizeof(unsigned int); 2699 i = (sb->s_blocksize_bits + 2) * sizeof(unsigned int);
2694 sbi->s_mb_maxs = kmalloc(i, GFP_KERNEL); 2700 sbi->s_mb_maxs = kmalloc(i, GFP_KERNEL);
2695 if (sbi->s_mb_maxs == NULL) { 2701 if (sbi->s_mb_maxs == NULL) {
2696 kfree(sbi->s_mb_maxs); 2702 kfree(sbi->s_mb_offsets);
2697 return -ENOMEM; 2703 return -ENOMEM;
2698 } 2704 }
2699 2705
@@ -2746,7 +2752,6 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery)
2746 spin_lock_init(&lg->lg_prealloc_lock); 2752 spin_lock_init(&lg->lg_prealloc_lock);
2747 } 2753 }
2748 2754
2749 ext4_mb_init_per_dev_proc(sb);
2750 ext4_mb_history_init(sb); 2755 ext4_mb_history_init(sb);
2751 2756
2752 if (sbi->s_journal) 2757 if (sbi->s_journal)
@@ -2829,7 +2834,6 @@ int ext4_mb_release(struct super_block *sb)
2829 2834
2830 free_percpu(sbi->s_locality_groups); 2835 free_percpu(sbi->s_locality_groups);
2831 ext4_mb_history_release(sb); 2836 ext4_mb_history_release(sb);
2832 ext4_mb_destroy_per_dev_proc(sb);
2833 2837
2834 return 0; 2838 return 0;
2835} 2839}
@@ -2890,62 +2894,6 @@ static void release_blocks_on_commit(journal_t *journal, transaction_t *txn)
2890 mb_debug("freed %u blocks in %u structures\n", count, count2); 2894 mb_debug("freed %u blocks in %u structures\n", count, count2);
2891} 2895}
2892 2896
2893#define EXT4_MB_STATS_NAME "stats"
2894#define EXT4_MB_MAX_TO_SCAN_NAME "max_to_scan"
2895#define EXT4_MB_MIN_TO_SCAN_NAME "min_to_scan"
2896#define EXT4_MB_ORDER2_REQ "order2_req"
2897#define EXT4_MB_STREAM_REQ "stream_req"
2898#define EXT4_MB_GROUP_PREALLOC "group_prealloc"
2899
2900static int ext4_mb_init_per_dev_proc(struct super_block *sb)
2901{
2902#ifdef CONFIG_PROC_FS
2903 mode_t mode = S_IFREG | S_IRUGO | S_IWUSR;
2904 struct ext4_sb_info *sbi = EXT4_SB(sb);
2905 struct proc_dir_entry *proc;
2906
2907 if (sbi->s_proc == NULL)
2908 return -EINVAL;
2909
2910 EXT4_PROC_HANDLER(EXT4_MB_STATS_NAME, mb_stats);
2911 EXT4_PROC_HANDLER(EXT4_MB_MAX_TO_SCAN_NAME, mb_max_to_scan);
2912 EXT4_PROC_HANDLER(EXT4_MB_MIN_TO_SCAN_NAME, mb_min_to_scan);
2913 EXT4_PROC_HANDLER(EXT4_MB_ORDER2_REQ, mb_order2_reqs);
2914 EXT4_PROC_HANDLER(EXT4_MB_STREAM_REQ, mb_stream_request);
2915 EXT4_PROC_HANDLER(EXT4_MB_GROUP_PREALLOC, mb_group_prealloc);
2916 return 0;
2917
2918err_out:
2919 remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_proc);
2920 remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_proc);
2921 remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_proc);
2922 remove_proc_entry(EXT4_MB_MIN_TO_SCAN_NAME, sbi->s_proc);
2923 remove_proc_entry(EXT4_MB_MAX_TO_SCAN_NAME, sbi->s_proc);
2924 remove_proc_entry(EXT4_MB_STATS_NAME, sbi->s_proc);
2925 return -ENOMEM;
2926#else
2927 return 0;
2928#endif
2929}
2930
2931static int ext4_mb_destroy_per_dev_proc(struct super_block *sb)
2932{
2933#ifdef CONFIG_PROC_FS
2934 struct ext4_sb_info *sbi = EXT4_SB(sb);
2935
2936 if (sbi->s_proc == NULL)
2937 return -EINVAL;
2938
2939 remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_proc);
2940 remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_proc);
2941 remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_proc);
2942 remove_proc_entry(EXT4_MB_MIN_TO_SCAN_NAME, sbi->s_proc);
2943 remove_proc_entry(EXT4_MB_MAX_TO_SCAN_NAME, sbi->s_proc);
2944 remove_proc_entry(EXT4_MB_STATS_NAME, sbi->s_proc);
2945#endif
2946 return 0;
2947}
2948
2949int __init init_ext4_mballoc(void) 2897int __init init_ext4_mballoc(void)
2950{ 2898{
2951 ext4_pspace_cachep = 2899 ext4_pspace_cachep =
@@ -3096,9 +3044,8 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
3096 if (sbi->s_log_groups_per_flex) { 3044 if (sbi->s_log_groups_per_flex) {
3097 ext4_group_t flex_group = ext4_flex_group(sbi, 3045 ext4_group_t flex_group = ext4_flex_group(sbi,
3098 ac->ac_b_ex.fe_group); 3046 ac->ac_b_ex.fe_group);
3099 spin_lock(sb_bgl_lock(sbi, flex_group)); 3047 atomic_sub(ac->ac_b_ex.fe_len,
3100 sbi->s_flex_groups[flex_group].free_blocks -= ac->ac_b_ex.fe_len; 3048 &sbi->s_flex_groups[flex_group].free_blocks);
3101 spin_unlock(sb_bgl_lock(sbi, flex_group));
3102 } 3049 }
3103 3050
3104 err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh); 3051 err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh);
@@ -3116,7 +3063,7 @@ out_err:
3116 * here we normalize request for locality group 3063 * here we normalize request for locality group
3117 * Group request are normalized to s_strip size if we set the same via mount 3064 * Group request are normalized to s_strip size if we set the same via mount
3118 * option. If not we set it to s_mb_group_prealloc which can be configured via 3065 * option. If not we set it to s_mb_group_prealloc which can be configured via
3119 * /proc/fs/ext4/<partition>/group_prealloc 3066 * /sys/fs/ext4/<partition>/mb_group_prealloc
3120 * 3067 *
3121 * XXX: should we try to preallocate more than the group has now? 3068 * XXX: should we try to preallocate more than the group has now?
3122 */ 3069 */
@@ -3608,8 +3555,11 @@ static void ext4_mb_put_pa(struct ext4_allocation_context *ac,
3608 spin_unlock(&pa->pa_lock); 3555 spin_unlock(&pa->pa_lock);
3609 3556
3610 grp_blk = pa->pa_pstart; 3557 grp_blk = pa->pa_pstart;
3611 /* If linear, pa_pstart may be in the next group when pa is used up */ 3558 /*
3612 if (pa->pa_linear) 3559 * If doing group-based preallocation, pa_pstart may be in the
3560 * next group when pa is used up
3561 */
3562 if (pa->pa_type == MB_GROUP_PA)
3613 grp_blk--; 3563 grp_blk--;
3614 3564
3615 ext4_get_group_no_and_offset(sb, grp_blk, &grp, NULL); 3565 ext4_get_group_no_and_offset(sb, grp_blk, &grp, NULL);
@@ -3704,7 +3654,7 @@ ext4_mb_new_inode_pa(struct ext4_allocation_context *ac)
3704 INIT_LIST_HEAD(&pa->pa_inode_list); 3654 INIT_LIST_HEAD(&pa->pa_inode_list);
3705 INIT_LIST_HEAD(&pa->pa_group_list); 3655 INIT_LIST_HEAD(&pa->pa_group_list);
3706 pa->pa_deleted = 0; 3656 pa->pa_deleted = 0;
3707 pa->pa_linear = 0; 3657 pa->pa_type = MB_INODE_PA;
3708 3658
3709 mb_debug("new inode pa %p: %llu/%u for %u\n", pa, 3659 mb_debug("new inode pa %p: %llu/%u for %u\n", pa,
3710 pa->pa_pstart, pa->pa_len, pa->pa_lstart); 3660 pa->pa_pstart, pa->pa_len, pa->pa_lstart);
@@ -3767,7 +3717,7 @@ ext4_mb_new_group_pa(struct ext4_allocation_context *ac)
3767 INIT_LIST_HEAD(&pa->pa_inode_list); 3717 INIT_LIST_HEAD(&pa->pa_inode_list);
3768 INIT_LIST_HEAD(&pa->pa_group_list); 3718 INIT_LIST_HEAD(&pa->pa_group_list);
3769 pa->pa_deleted = 0; 3719 pa->pa_deleted = 0;
3770 pa->pa_linear = 1; 3720 pa->pa_type = MB_GROUP_PA;
3771 3721
3772 mb_debug("new group pa %p: %llu/%u for %u\n", pa, 3722 mb_debug("new group pa %p: %llu/%u for %u\n", pa,
3773 pa->pa_pstart, pa->pa_len, pa->pa_lstart); 3723 pa->pa_pstart, pa->pa_len, pa->pa_lstart);
@@ -4021,7 +3971,7 @@ repeat:
4021 list_del_rcu(&pa->pa_inode_list); 3971 list_del_rcu(&pa->pa_inode_list);
4022 spin_unlock(pa->pa_obj_lock); 3972 spin_unlock(pa->pa_obj_lock);
4023 3973
4024 if (pa->pa_linear) 3974 if (pa->pa_type == MB_GROUP_PA)
4025 ext4_mb_release_group_pa(&e4b, pa, ac); 3975 ext4_mb_release_group_pa(&e4b, pa, ac);
4026 else 3976 else
4027 ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa, ac); 3977 ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa, ac);
@@ -4121,7 +4071,7 @@ repeat:
4121 spin_unlock(&ei->i_prealloc_lock); 4071 spin_unlock(&ei->i_prealloc_lock);
4122 4072
4123 list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) { 4073 list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) {
4124 BUG_ON(pa->pa_linear != 0); 4074 BUG_ON(pa->pa_type != MB_INODE_PA);
4125 ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, NULL); 4075 ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, NULL);
4126 4076
4127 err = ext4_mb_load_buddy(sb, group, &e4b); 4077 err = ext4_mb_load_buddy(sb, group, &e4b);
@@ -4232,7 +4182,7 @@ static inline void ext4_mb_show_ac(struct ext4_allocation_context *ac)
4232 * file is determined by the current size or the resulting size after 4182 * file is determined by the current size or the resulting size after
4233 * allocation which ever is larger 4183 * allocation which ever is larger
4234 * 4184 *
4235 * One can tune this size via /proc/fs/ext4/<partition>/stream_req 4185 * One can tune this size via /sys/fs/ext4/<partition>/mb_stream_req
4236 */ 4186 */
4237static void ext4_mb_group_or_file(struct ext4_allocation_context *ac) 4187static void ext4_mb_group_or_file(struct ext4_allocation_context *ac)
4238{ 4188{
@@ -4373,7 +4323,7 @@ ext4_mb_discard_lg_preallocations(struct super_block *sb,
4373 continue; 4323 continue;
4374 } 4324 }
4375 /* only lg prealloc space */ 4325 /* only lg prealloc space */
4376 BUG_ON(!pa->pa_linear); 4326 BUG_ON(pa->pa_type != MB_GROUP_PA);
4377 4327
4378 /* seems this one can be freed ... */ 4328 /* seems this one can be freed ... */
4379 pa->pa_deleted = 1; 4329 pa->pa_deleted = 1;
@@ -4442,7 +4392,7 @@ static void ext4_mb_add_n_trim(struct ext4_allocation_context *ac)
4442 pa_inode_list) { 4392 pa_inode_list) {
4443 spin_lock(&tmp_pa->pa_lock); 4393 spin_lock(&tmp_pa->pa_lock);
4444 if (tmp_pa->pa_deleted) { 4394 if (tmp_pa->pa_deleted) {
4445 spin_unlock(&pa->pa_lock); 4395 spin_unlock(&tmp_pa->pa_lock);
4446 continue; 4396 continue;
4447 } 4397 }
4448 if (!added && pa->pa_free < tmp_pa->pa_free) { 4398 if (!added && pa->pa_free < tmp_pa->pa_free) {
@@ -4479,7 +4429,7 @@ static int ext4_mb_release_context(struct ext4_allocation_context *ac)
4479{ 4429{
4480 struct ext4_prealloc_space *pa = ac->ac_pa; 4430 struct ext4_prealloc_space *pa = ac->ac_pa;
4481 if (pa) { 4431 if (pa) {
4482 if (pa->pa_linear) { 4432 if (pa->pa_type == MB_GROUP_PA) {
4483 /* see comment in ext4_mb_use_group_pa() */ 4433 /* see comment in ext4_mb_use_group_pa() */
4484 spin_lock(&pa->pa_lock); 4434 spin_lock(&pa->pa_lock);
4485 pa->pa_pstart += ac->ac_b_ex.fe_len; 4435 pa->pa_pstart += ac->ac_b_ex.fe_len;
@@ -4499,7 +4449,7 @@ static int ext4_mb_release_context(struct ext4_allocation_context *ac)
4499 * doesn't grow big. We need to release 4449 * doesn't grow big. We need to release
4500 * alloc_semp before calling ext4_mb_add_n_trim() 4450 * alloc_semp before calling ext4_mb_add_n_trim()
4501 */ 4451 */
4502 if (pa->pa_linear && likely(pa->pa_free)) { 4452 if ((pa->pa_type == MB_GROUP_PA) && likely(pa->pa_free)) {
4503 spin_lock(pa->pa_obj_lock); 4453 spin_lock(pa->pa_obj_lock);
4504 list_del_rcu(&pa->pa_inode_list); 4454 list_del_rcu(&pa->pa_inode_list);
4505 spin_unlock(pa->pa_obj_lock); 4455 spin_unlock(pa->pa_obj_lock);
@@ -4936,9 +4886,7 @@ do_more:
4936 4886
4937 if (sbi->s_log_groups_per_flex) { 4887 if (sbi->s_log_groups_per_flex) {
4938 ext4_group_t flex_group = ext4_flex_group(sbi, block_group); 4888 ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
4939 spin_lock(sb_bgl_lock(sbi, flex_group)); 4889 atomic_add(count, &sbi->s_flex_groups[flex_group].free_blocks);
4940 sbi->s_flex_groups[flex_group].free_blocks += count;
4941 spin_unlock(sb_bgl_lock(sbi, flex_group));
4942 } 4890 }
4943 4891
4944 ext4_mb_release_desc(&e4b); 4892 ext4_mb_release_desc(&e4b);
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 10a2921baf14..dd9e6cd5f6cf 100644
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -132,12 +132,15 @@ struct ext4_prealloc_space {
132 ext4_lblk_t pa_lstart; /* log. block */ 132 ext4_lblk_t pa_lstart; /* log. block */
133 unsigned short pa_len; /* len of preallocated chunk */ 133 unsigned short pa_len; /* len of preallocated chunk */
134 unsigned short pa_free; /* how many blocks are free */ 134 unsigned short pa_free; /* how many blocks are free */
135 unsigned short pa_linear; /* consumed in one direction 135 unsigned short pa_type; /* pa type. inode or group */
136 * strictly, for grp prealloc */
137 spinlock_t *pa_obj_lock; 136 spinlock_t *pa_obj_lock;
138 struct inode *pa_inode; /* hack, for history only */ 137 struct inode *pa_inode; /* hack, for history only */
139}; 138};
140 139
140enum {
141 MB_INODE_PA = 0,
142 MB_GROUP_PA = 1
143};
141 144
142struct ext4_free_extent { 145struct ext4_free_extent {
143 ext4_lblk_t fe_logical; 146 ext4_lblk_t fe_logical;
@@ -247,7 +250,6 @@ static inline void ext4_mb_store_history(struct ext4_allocation_context *ac)
247 250
248#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) 251#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
249 252
250struct buffer_head *read_block_bitmap(struct super_block *, ext4_group_t);
251static inline ext4_fsblk_t ext4_grp_offs_to_block(struct super_block *sb, 253static inline ext4_fsblk_t ext4_grp_offs_to_block(struct super_block *sb,
252 struct ext4_free_extent *fex) 254 struct ext4_free_extent *fex)
253{ 255{
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 83410244d3ee..22098e1cd085 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -161,12 +161,12 @@ static struct dx_frame *dx_probe(const struct qstr *d_name,
161 struct dx_frame *frame, 161 struct dx_frame *frame,
162 int *err); 162 int *err);
163static void dx_release(struct dx_frame *frames); 163static void dx_release(struct dx_frame *frames);
164static int dx_make_map(struct ext4_dir_entry_2 *de, int size, 164static int dx_make_map(struct ext4_dir_entry_2 *de, unsigned blocksize,
165 struct dx_hash_info *hinfo, struct dx_map_entry map[]); 165 struct dx_hash_info *hinfo, struct dx_map_entry map[]);
166static void dx_sort_map(struct dx_map_entry *map, unsigned count); 166static void dx_sort_map(struct dx_map_entry *map, unsigned count);
167static struct ext4_dir_entry_2 *dx_move_dirents(char *from, char *to, 167static struct ext4_dir_entry_2 *dx_move_dirents(char *from, char *to,
168 struct dx_map_entry *offsets, int count); 168 struct dx_map_entry *offsets, int count, unsigned blocksize);
169static struct ext4_dir_entry_2* dx_pack_dirents(char *base, int size); 169static struct ext4_dir_entry_2* dx_pack_dirents(char *base, unsigned blocksize);
170static void dx_insert_block(struct dx_frame *frame, 170static void dx_insert_block(struct dx_frame *frame,
171 u32 hash, ext4_lblk_t block); 171 u32 hash, ext4_lblk_t block);
172static int ext4_htree_next_block(struct inode *dir, __u32 hash, 172static int ext4_htree_next_block(struct inode *dir, __u32 hash,
@@ -180,14 +180,38 @@ static struct buffer_head * ext4_dx_find_entry(struct inode *dir,
180static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry, 180static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
181 struct inode *inode); 181 struct inode *inode);
182 182
183unsigned int ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize)
184{
185 unsigned len = le16_to_cpu(dlen);
186
187 if (len == EXT4_MAX_REC_LEN || len == 0)
188 return blocksize;
189 return (len & 65532) | ((len & 3) << 16);
190}
191
192__le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize)
193{
194 if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3))
195 BUG();
196 if (len < 65536)
197 return cpu_to_le16(len);
198 if (len == blocksize) {
199 if (blocksize == 65536)
200 return cpu_to_le16(EXT4_MAX_REC_LEN);
201 else
202 return cpu_to_le16(0);
203 }
204 return cpu_to_le16((len & 65532) | ((len >> 16) & 3));
205}
206
183/* 207/*
184 * p is at least 6 bytes before the end of page 208 * p is at least 6 bytes before the end of page
185 */ 209 */
186static inline struct ext4_dir_entry_2 * 210static inline struct ext4_dir_entry_2 *
187ext4_next_entry(struct ext4_dir_entry_2 *p) 211ext4_next_entry(struct ext4_dir_entry_2 *p, unsigned long blocksize)
188{ 212{
189 return (struct ext4_dir_entry_2 *)((char *)p + 213 return (struct ext4_dir_entry_2 *)((char *)p +
190 ext4_rec_len_from_disk(p->rec_len)); 214 ext4_rec_len_from_disk(p->rec_len, blocksize));
191} 215}
192 216
193/* 217/*
@@ -294,7 +318,7 @@ static struct stats dx_show_leaf(struct dx_hash_info *hinfo, struct ext4_dir_ent
294 space += EXT4_DIR_REC_LEN(de->name_len); 318 space += EXT4_DIR_REC_LEN(de->name_len);
295 names++; 319 names++;
296 } 320 }
297 de = ext4_next_entry(de); 321 de = ext4_next_entry(de, size);
298 } 322 }
299 printk("(%i)\n", names); 323 printk("(%i)\n", names);
300 return (struct stats) { names, space, 1 }; 324 return (struct stats) { names, space, 1 };
@@ -585,7 +609,7 @@ static int htree_dirblock_to_tree(struct file *dir_file,
585 top = (struct ext4_dir_entry_2 *) ((char *) de + 609 top = (struct ext4_dir_entry_2 *) ((char *) de +
586 dir->i_sb->s_blocksize - 610 dir->i_sb->s_blocksize -
587 EXT4_DIR_REC_LEN(0)); 611 EXT4_DIR_REC_LEN(0));
588 for (; de < top; de = ext4_next_entry(de)) { 612 for (; de < top; de = ext4_next_entry(de, dir->i_sb->s_blocksize)) {
589 if (!ext4_check_dir_entry("htree_dirblock_to_tree", dir, de, bh, 613 if (!ext4_check_dir_entry("htree_dirblock_to_tree", dir, de, bh,
590 (block<<EXT4_BLOCK_SIZE_BITS(dir->i_sb)) 614 (block<<EXT4_BLOCK_SIZE_BITS(dir->i_sb))
591 +((char *)de - bh->b_data))) { 615 +((char *)de - bh->b_data))) {
@@ -663,7 +687,7 @@ int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
663 } 687 }
664 if (start_hash < 2 || (start_hash ==2 && start_minor_hash==0)) { 688 if (start_hash < 2 || (start_hash ==2 && start_minor_hash==0)) {
665 de = (struct ext4_dir_entry_2 *) frames[0].bh->b_data; 689 de = (struct ext4_dir_entry_2 *) frames[0].bh->b_data;
666 de = ext4_next_entry(de); 690 de = ext4_next_entry(de, dir->i_sb->s_blocksize);
667 if ((err = ext4_htree_store_dirent(dir_file, 2, 0, de)) != 0) 691 if ((err = ext4_htree_store_dirent(dir_file, 2, 0, de)) != 0)
668 goto errout; 692 goto errout;
669 count++; 693 count++;
@@ -713,15 +737,15 @@ errout:
713 * Create map of hash values, offsets, and sizes, stored at end of block. 737 * Create map of hash values, offsets, and sizes, stored at end of block.
714 * Returns number of entries mapped. 738 * Returns number of entries mapped.
715 */ 739 */
716static int dx_make_map (struct ext4_dir_entry_2 *de, int size, 740static int dx_make_map(struct ext4_dir_entry_2 *de, unsigned blocksize,
717 struct dx_hash_info *hinfo, struct dx_map_entry *map_tail) 741 struct dx_hash_info *hinfo,
742 struct dx_map_entry *map_tail)
718{ 743{
719 int count = 0; 744 int count = 0;
720 char *base = (char *) de; 745 char *base = (char *) de;
721 struct dx_hash_info h = *hinfo; 746 struct dx_hash_info h = *hinfo;
722 747
723 while ((char *) de < base + size) 748 while ((char *) de < base + blocksize) {
724 {
725 if (de->name_len && de->inode) { 749 if (de->name_len && de->inode) {
726 ext4fs_dirhash(de->name, de->name_len, &h); 750 ext4fs_dirhash(de->name, de->name_len, &h);
727 map_tail--; 751 map_tail--;
@@ -732,7 +756,7 @@ static int dx_make_map (struct ext4_dir_entry_2 *de, int size,
732 cond_resched(); 756 cond_resched();
733 } 757 }
734 /* XXX: do we need to check rec_len == 0 case? -Chris */ 758 /* XXX: do we need to check rec_len == 0 case? -Chris */
735 de = ext4_next_entry(de); 759 de = ext4_next_entry(de, blocksize);
736 } 760 }
737 return count; 761 return count;
738} 762}
@@ -832,7 +856,8 @@ static inline int search_dirblock(struct buffer_head *bh,
832 return 1; 856 return 1;
833 } 857 }
834 /* prevent looping on a bad block */ 858 /* prevent looping on a bad block */
835 de_len = ext4_rec_len_from_disk(de->rec_len); 859 de_len = ext4_rec_len_from_disk(de->rec_len,
860 dir->i_sb->s_blocksize);
836 if (de_len <= 0) 861 if (de_len <= 0)
837 return -1; 862 return -1;
838 offset += de_len; 863 offset += de_len;
@@ -996,7 +1021,7 @@ static struct buffer_head * ext4_dx_find_entry(struct inode *dir, const struct q
996 de = (struct ext4_dir_entry_2 *) bh->b_data; 1021 de = (struct ext4_dir_entry_2 *) bh->b_data;
997 top = (struct ext4_dir_entry_2 *) ((char *) de + sb->s_blocksize - 1022 top = (struct ext4_dir_entry_2 *) ((char *) de + sb->s_blocksize -
998 EXT4_DIR_REC_LEN(0)); 1023 EXT4_DIR_REC_LEN(0));
999 for (; de < top; de = ext4_next_entry(de)) { 1024 for (; de < top; de = ext4_next_entry(de, sb->s_blocksize)) {
1000 int off = (block << EXT4_BLOCK_SIZE_BITS(sb)) 1025 int off = (block << EXT4_BLOCK_SIZE_BITS(sb))
1001 + ((char *) de - bh->b_data); 1026 + ((char *) de - bh->b_data);
1002 1027
@@ -1052,8 +1077,16 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, stru
1052 return ERR_PTR(-EIO); 1077 return ERR_PTR(-EIO);
1053 } 1078 }
1054 inode = ext4_iget(dir->i_sb, ino); 1079 inode = ext4_iget(dir->i_sb, ino);
1055 if (IS_ERR(inode)) 1080 if (unlikely(IS_ERR(inode))) {
1056 return ERR_CAST(inode); 1081 if (PTR_ERR(inode) == -ESTALE) {
1082 ext4_error(dir->i_sb, __func__,
1083 "deleted inode referenced: %u",
1084 ino);
1085 return ERR_PTR(-EIO);
1086 } else {
1087 return ERR_CAST(inode);
1088 }
1089 }
1057 } 1090 }
1058 return d_splice_alias(inode, dentry); 1091 return d_splice_alias(inode, dentry);
1059} 1092}
@@ -1109,7 +1142,8 @@ static inline void ext4_set_de_type(struct super_block *sb,
1109 * Returns pointer to last entry moved. 1142 * Returns pointer to last entry moved.
1110 */ 1143 */
1111static struct ext4_dir_entry_2 * 1144static struct ext4_dir_entry_2 *
1112dx_move_dirents(char *from, char *to, struct dx_map_entry *map, int count) 1145dx_move_dirents(char *from, char *to, struct dx_map_entry *map, int count,
1146 unsigned blocksize)
1113{ 1147{
1114 unsigned rec_len = 0; 1148 unsigned rec_len = 0;
1115 1149
@@ -1118,7 +1152,7 @@ dx_move_dirents(char *from, char *to, struct dx_map_entry *map, int count)
1118 rec_len = EXT4_DIR_REC_LEN(de->name_len); 1152 rec_len = EXT4_DIR_REC_LEN(de->name_len);
1119 memcpy (to, de, rec_len); 1153 memcpy (to, de, rec_len);
1120 ((struct ext4_dir_entry_2 *) to)->rec_len = 1154 ((struct ext4_dir_entry_2 *) to)->rec_len =
1121 ext4_rec_len_to_disk(rec_len); 1155 ext4_rec_len_to_disk(rec_len, blocksize);
1122 de->inode = 0; 1156 de->inode = 0;
1123 map++; 1157 map++;
1124 to += rec_len; 1158 to += rec_len;
@@ -1130,19 +1164,19 @@ dx_move_dirents(char *from, char *to, struct dx_map_entry *map, int count)
1130 * Compact each dir entry in the range to the minimal rec_len. 1164 * Compact each dir entry in the range to the minimal rec_len.
1131 * Returns pointer to last entry in range. 1165 * Returns pointer to last entry in range.
1132 */ 1166 */
1133static struct ext4_dir_entry_2* dx_pack_dirents(char *base, int size) 1167static struct ext4_dir_entry_2* dx_pack_dirents(char *base, unsigned blocksize)
1134{ 1168{
1135 struct ext4_dir_entry_2 *next, *to, *prev, *de = (struct ext4_dir_entry_2 *) base; 1169 struct ext4_dir_entry_2 *next, *to, *prev, *de = (struct ext4_dir_entry_2 *) base;
1136 unsigned rec_len = 0; 1170 unsigned rec_len = 0;
1137 1171
1138 prev = to = de; 1172 prev = to = de;
1139 while ((char*)de < base + size) { 1173 while ((char*)de < base + blocksize) {
1140 next = ext4_next_entry(de); 1174 next = ext4_next_entry(de, blocksize);
1141 if (de->inode && de->name_len) { 1175 if (de->inode && de->name_len) {
1142 rec_len = EXT4_DIR_REC_LEN(de->name_len); 1176 rec_len = EXT4_DIR_REC_LEN(de->name_len);
1143 if (de > to) 1177 if (de > to)
1144 memmove(to, de, rec_len); 1178 memmove(to, de, rec_len);
1145 to->rec_len = ext4_rec_len_to_disk(rec_len); 1179 to->rec_len = ext4_rec_len_to_disk(rec_len, blocksize);
1146 prev = to; 1180 prev = to;
1147 to = (struct ext4_dir_entry_2 *) (((char *) to) + rec_len); 1181 to = (struct ext4_dir_entry_2 *) (((char *) to) + rec_len);
1148 } 1182 }
@@ -1215,10 +1249,12 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
1215 hash2, split, count-split)); 1249 hash2, split, count-split));
1216 1250
1217 /* Fancy dance to stay within two buffers */ 1251 /* Fancy dance to stay within two buffers */
1218 de2 = dx_move_dirents(data1, data2, map + split, count - split); 1252 de2 = dx_move_dirents(data1, data2, map + split, count - split, blocksize);
1219 de = dx_pack_dirents(data1, blocksize); 1253 de = dx_pack_dirents(data1, blocksize);
1220 de->rec_len = ext4_rec_len_to_disk(data1 + blocksize - (char *) de); 1254 de->rec_len = ext4_rec_len_to_disk(data1 + blocksize - (char *) de,
1221 de2->rec_len = ext4_rec_len_to_disk(data2 + blocksize - (char *) de2); 1255 blocksize);
1256 de2->rec_len = ext4_rec_len_to_disk(data2 + blocksize - (char *) de2,
1257 blocksize);
1222 dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data1, blocksize, 1)); 1258 dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data1, blocksize, 1));
1223 dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data2, blocksize, 1)); 1259 dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data2, blocksize, 1));
1224 1260
@@ -1268,6 +1304,7 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
1268 const char *name = dentry->d_name.name; 1304 const char *name = dentry->d_name.name;
1269 int namelen = dentry->d_name.len; 1305 int namelen = dentry->d_name.len;
1270 unsigned int offset = 0; 1306 unsigned int offset = 0;
1307 unsigned int blocksize = dir->i_sb->s_blocksize;
1271 unsigned short reclen; 1308 unsigned short reclen;
1272 int nlen, rlen, err; 1309 int nlen, rlen, err;
1273 char *top; 1310 char *top;
@@ -1275,7 +1312,7 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
1275 reclen = EXT4_DIR_REC_LEN(namelen); 1312 reclen = EXT4_DIR_REC_LEN(namelen);
1276 if (!de) { 1313 if (!de) {
1277 de = (struct ext4_dir_entry_2 *)bh->b_data; 1314 de = (struct ext4_dir_entry_2 *)bh->b_data;
1278 top = bh->b_data + dir->i_sb->s_blocksize - reclen; 1315 top = bh->b_data + blocksize - reclen;
1279 while ((char *) de <= top) { 1316 while ((char *) de <= top) {
1280 if (!ext4_check_dir_entry("ext4_add_entry", dir, de, 1317 if (!ext4_check_dir_entry("ext4_add_entry", dir, de,
1281 bh, offset)) { 1318 bh, offset)) {
@@ -1287,7 +1324,7 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
1287 return -EEXIST; 1324 return -EEXIST;
1288 } 1325 }
1289 nlen = EXT4_DIR_REC_LEN(de->name_len); 1326 nlen = EXT4_DIR_REC_LEN(de->name_len);
1290 rlen = ext4_rec_len_from_disk(de->rec_len); 1327 rlen = ext4_rec_len_from_disk(de->rec_len, blocksize);
1291 if ((de->inode? rlen - nlen: rlen) >= reclen) 1328 if ((de->inode? rlen - nlen: rlen) >= reclen)
1292 break; 1329 break;
1293 de = (struct ext4_dir_entry_2 *)((char *)de + rlen); 1330 de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
@@ -1306,11 +1343,11 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
1306 1343
1307 /* By now the buffer is marked for journaling */ 1344 /* By now the buffer is marked for journaling */
1308 nlen = EXT4_DIR_REC_LEN(de->name_len); 1345 nlen = EXT4_DIR_REC_LEN(de->name_len);
1309 rlen = ext4_rec_len_from_disk(de->rec_len); 1346 rlen = ext4_rec_len_from_disk(de->rec_len, blocksize);
1310 if (de->inode) { 1347 if (de->inode) {
1311 struct ext4_dir_entry_2 *de1 = (struct ext4_dir_entry_2 *)((char *)de + nlen); 1348 struct ext4_dir_entry_2 *de1 = (struct ext4_dir_entry_2 *)((char *)de + nlen);
1312 de1->rec_len = ext4_rec_len_to_disk(rlen - nlen); 1349 de1->rec_len = ext4_rec_len_to_disk(rlen - nlen, blocksize);
1313 de->rec_len = ext4_rec_len_to_disk(nlen); 1350 de->rec_len = ext4_rec_len_to_disk(nlen, blocksize);
1314 de = de1; 1351 de = de1;
1315 } 1352 }
1316 de->file_type = EXT4_FT_UNKNOWN; 1353 de->file_type = EXT4_FT_UNKNOWN;
@@ -1380,7 +1417,7 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
1380 /* The 0th block becomes the root, move the dirents out */ 1417 /* The 0th block becomes the root, move the dirents out */
1381 fde = &root->dotdot; 1418 fde = &root->dotdot;
1382 de = (struct ext4_dir_entry_2 *)((char *)fde + 1419 de = (struct ext4_dir_entry_2 *)((char *)fde +
1383 ext4_rec_len_from_disk(fde->rec_len)); 1420 ext4_rec_len_from_disk(fde->rec_len, blocksize));
1384 if ((char *) de >= (((char *) root) + blocksize)) { 1421 if ((char *) de >= (((char *) root) + blocksize)) {
1385 ext4_error(dir->i_sb, __func__, 1422 ext4_error(dir->i_sb, __func__,
1386 "invalid rec_len for '..' in inode %lu", 1423 "invalid rec_len for '..' in inode %lu",
@@ -1402,12 +1439,14 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
1402 memcpy (data1, de, len); 1439 memcpy (data1, de, len);
1403 de = (struct ext4_dir_entry_2 *) data1; 1440 de = (struct ext4_dir_entry_2 *) data1;
1404 top = data1 + len; 1441 top = data1 + len;
1405 while ((char *)(de2 = ext4_next_entry(de)) < top) 1442 while ((char *)(de2 = ext4_next_entry(de, blocksize)) < top)
1406 de = de2; 1443 de = de2;
1407 de->rec_len = ext4_rec_len_to_disk(data1 + blocksize - (char *) de); 1444 de->rec_len = ext4_rec_len_to_disk(data1 + blocksize - (char *) de,
1445 blocksize);
1408 /* Initialize the root; the dot dirents already exist */ 1446 /* Initialize the root; the dot dirents already exist */
1409 de = (struct ext4_dir_entry_2 *) (&root->dotdot); 1447 de = (struct ext4_dir_entry_2 *) (&root->dotdot);
1410 de->rec_len = ext4_rec_len_to_disk(blocksize - EXT4_DIR_REC_LEN(2)); 1448 de->rec_len = ext4_rec_len_to_disk(blocksize - EXT4_DIR_REC_LEN(2),
1449 blocksize);
1411 memset (&root->info, 0, sizeof(root->info)); 1450 memset (&root->info, 0, sizeof(root->info));
1412 root->info.info_length = sizeof(root->info); 1451 root->info.info_length = sizeof(root->info);
1413 root->info.hash_version = EXT4_SB(dir->i_sb)->s_def_hash_version; 1452 root->info.hash_version = EXT4_SB(dir->i_sb)->s_def_hash_version;
@@ -1488,7 +1527,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
1488 return retval; 1527 return retval;
1489 de = (struct ext4_dir_entry_2 *) bh->b_data; 1528 de = (struct ext4_dir_entry_2 *) bh->b_data;
1490 de->inode = 0; 1529 de->inode = 0;
1491 de->rec_len = ext4_rec_len_to_disk(blocksize); 1530 de->rec_len = ext4_rec_len_to_disk(blocksize, blocksize);
1492 return add_dirent_to_buf(handle, dentry, inode, de, bh); 1531 return add_dirent_to_buf(handle, dentry, inode, de, bh);
1493} 1532}
1494 1533
@@ -1551,7 +1590,8 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
1551 goto cleanup; 1590 goto cleanup;
1552 node2 = (struct dx_node *)(bh2->b_data); 1591 node2 = (struct dx_node *)(bh2->b_data);
1553 entries2 = node2->entries; 1592 entries2 = node2->entries;
1554 node2->fake.rec_len = ext4_rec_len_to_disk(sb->s_blocksize); 1593 node2->fake.rec_len = ext4_rec_len_to_disk(sb->s_blocksize,
1594 sb->s_blocksize);
1555 node2->fake.inode = 0; 1595 node2->fake.inode = 0;
1556 BUFFER_TRACE(frame->bh, "get_write_access"); 1596 BUFFER_TRACE(frame->bh, "get_write_access");
1557 err = ext4_journal_get_write_access(handle, frame->bh); 1597 err = ext4_journal_get_write_access(handle, frame->bh);
@@ -1639,6 +1679,7 @@ static int ext4_delete_entry(handle_t *handle,
1639 struct buffer_head *bh) 1679 struct buffer_head *bh)
1640{ 1680{
1641 struct ext4_dir_entry_2 *de, *pde; 1681 struct ext4_dir_entry_2 *de, *pde;
1682 unsigned int blocksize = dir->i_sb->s_blocksize;
1642 int i; 1683 int i;
1643 1684
1644 i = 0; 1685 i = 0;
@@ -1652,8 +1693,11 @@ static int ext4_delete_entry(handle_t *handle,
1652 ext4_journal_get_write_access(handle, bh); 1693 ext4_journal_get_write_access(handle, bh);
1653 if (pde) 1694 if (pde)
1654 pde->rec_len = ext4_rec_len_to_disk( 1695 pde->rec_len = ext4_rec_len_to_disk(
1655 ext4_rec_len_from_disk(pde->rec_len) + 1696 ext4_rec_len_from_disk(pde->rec_len,
1656 ext4_rec_len_from_disk(de->rec_len)); 1697 blocksize) +
1698 ext4_rec_len_from_disk(de->rec_len,
1699 blocksize),
1700 blocksize);
1657 else 1701 else
1658 de->inode = 0; 1702 de->inode = 0;
1659 dir->i_version++; 1703 dir->i_version++;
@@ -1661,9 +1705,9 @@ static int ext4_delete_entry(handle_t *handle,
1661 ext4_handle_dirty_metadata(handle, dir, bh); 1705 ext4_handle_dirty_metadata(handle, dir, bh);
1662 return 0; 1706 return 0;
1663 } 1707 }
1664 i += ext4_rec_len_from_disk(de->rec_len); 1708 i += ext4_rec_len_from_disk(de->rec_len, blocksize);
1665 pde = de; 1709 pde = de;
1666 de = ext4_next_entry(de); 1710 de = ext4_next_entry(de, blocksize);
1667 } 1711 }
1668 return -ENOENT; 1712 return -ENOENT;
1669} 1713}
@@ -1793,6 +1837,7 @@ static int ext4_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1793 struct inode *inode; 1837 struct inode *inode;
1794 struct buffer_head *dir_block; 1838 struct buffer_head *dir_block;
1795 struct ext4_dir_entry_2 *de; 1839 struct ext4_dir_entry_2 *de;
1840 unsigned int blocksize = dir->i_sb->s_blocksize;
1796 int err, retries = 0; 1841 int err, retries = 0;
1797 1842
1798 if (EXT4_DIR_LINK_MAX(dir)) 1843 if (EXT4_DIR_LINK_MAX(dir))
@@ -1824,13 +1869,14 @@ retry:
1824 de = (struct ext4_dir_entry_2 *) dir_block->b_data; 1869 de = (struct ext4_dir_entry_2 *) dir_block->b_data;
1825 de->inode = cpu_to_le32(inode->i_ino); 1870 de->inode = cpu_to_le32(inode->i_ino);
1826 de->name_len = 1; 1871 de->name_len = 1;
1827 de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len)); 1872 de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len),
1873 blocksize);
1828 strcpy(de->name, "."); 1874 strcpy(de->name, ".");
1829 ext4_set_de_type(dir->i_sb, de, S_IFDIR); 1875 ext4_set_de_type(dir->i_sb, de, S_IFDIR);
1830 de = ext4_next_entry(de); 1876 de = ext4_next_entry(de, blocksize);
1831 de->inode = cpu_to_le32(dir->i_ino); 1877 de->inode = cpu_to_le32(dir->i_ino);
1832 de->rec_len = ext4_rec_len_to_disk(inode->i_sb->s_blocksize - 1878 de->rec_len = ext4_rec_len_to_disk(blocksize - EXT4_DIR_REC_LEN(1),
1833 EXT4_DIR_REC_LEN(1)); 1879 blocksize);
1834 de->name_len = 2; 1880 de->name_len = 2;
1835 strcpy(de->name, ".."); 1881 strcpy(de->name, "..");
1836 ext4_set_de_type(dir->i_sb, de, S_IFDIR); 1882 ext4_set_de_type(dir->i_sb, de, S_IFDIR);
@@ -1885,7 +1931,7 @@ static int empty_dir(struct inode *inode)
1885 return 1; 1931 return 1;
1886 } 1932 }
1887 de = (struct ext4_dir_entry_2 *) bh->b_data; 1933 de = (struct ext4_dir_entry_2 *) bh->b_data;
1888 de1 = ext4_next_entry(de); 1934 de1 = ext4_next_entry(de, sb->s_blocksize);
1889 if (le32_to_cpu(de->inode) != inode->i_ino || 1935 if (le32_to_cpu(de->inode) != inode->i_ino ||
1890 !le32_to_cpu(de1->inode) || 1936 !le32_to_cpu(de1->inode) ||
1891 strcmp(".", de->name) || 1937 strcmp(".", de->name) ||
@@ -1896,9 +1942,9 @@ static int empty_dir(struct inode *inode)
1896 brelse(bh); 1942 brelse(bh);
1897 return 1; 1943 return 1;
1898 } 1944 }
1899 offset = ext4_rec_len_from_disk(de->rec_len) + 1945 offset = ext4_rec_len_from_disk(de->rec_len, sb->s_blocksize) +
1900 ext4_rec_len_from_disk(de1->rec_len); 1946 ext4_rec_len_from_disk(de1->rec_len, sb->s_blocksize);
1901 de = ext4_next_entry(de1); 1947 de = ext4_next_entry(de1, sb->s_blocksize);
1902 while (offset < inode->i_size) { 1948 while (offset < inode->i_size) {
1903 if (!bh || 1949 if (!bh ||
1904 (void *) de >= (void *) (bh->b_data+sb->s_blocksize)) { 1950 (void *) de >= (void *) (bh->b_data+sb->s_blocksize)) {
@@ -1927,8 +1973,8 @@ static int empty_dir(struct inode *inode)
1927 brelse(bh); 1973 brelse(bh);
1928 return 0; 1974 return 0;
1929 } 1975 }
1930 offset += ext4_rec_len_from_disk(de->rec_len); 1976 offset += ext4_rec_len_from_disk(de->rec_len, sb->s_blocksize);
1931 de = ext4_next_entry(de); 1977 de = ext4_next_entry(de, sb->s_blocksize);
1932 } 1978 }
1933 brelse(bh); 1979 brelse(bh);
1934 return 1; 1980 return 1;
@@ -2297,8 +2343,8 @@ retry:
2297 return err; 2343 return err;
2298} 2344}
2299 2345
2300#define PARENT_INO(buffer) \ 2346#define PARENT_INO(buffer, size) \
2301 (ext4_next_entry((struct ext4_dir_entry_2 *)(buffer))->inode) 2347 (ext4_next_entry((struct ext4_dir_entry_2 *)(buffer), size)->inode)
2302 2348
2303/* 2349/*
2304 * Anybody can rename anything with this: the permission checks are left to the 2350 * Anybody can rename anything with this: the permission checks are left to the
@@ -2311,7 +2357,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
2311 struct inode *old_inode, *new_inode; 2357 struct inode *old_inode, *new_inode;
2312 struct buffer_head *old_bh, *new_bh, *dir_bh; 2358 struct buffer_head *old_bh, *new_bh, *dir_bh;
2313 struct ext4_dir_entry_2 *old_de, *new_de; 2359 struct ext4_dir_entry_2 *old_de, *new_de;
2314 int retval; 2360 int retval, force_da_alloc = 0;
2315 2361
2316 old_bh = new_bh = dir_bh = NULL; 2362 old_bh = new_bh = dir_bh = NULL;
2317 2363
@@ -2358,7 +2404,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
2358 dir_bh = ext4_bread(handle, old_inode, 0, 0, &retval); 2404 dir_bh = ext4_bread(handle, old_inode, 0, 0, &retval);
2359 if (!dir_bh) 2405 if (!dir_bh)
2360 goto end_rename; 2406 goto end_rename;
2361 if (le32_to_cpu(PARENT_INO(dir_bh->b_data)) != old_dir->i_ino) 2407 if (le32_to_cpu(PARENT_INO(dir_bh->b_data,
2408 old_dir->i_sb->s_blocksize)) != old_dir->i_ino)
2362 goto end_rename; 2409 goto end_rename;
2363 retval = -EMLINK; 2410 retval = -EMLINK;
2364 if (!new_inode && new_dir != old_dir && 2411 if (!new_inode && new_dir != old_dir &&
@@ -2430,7 +2477,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
2430 if (dir_bh) { 2477 if (dir_bh) {
2431 BUFFER_TRACE(dir_bh, "get_write_access"); 2478 BUFFER_TRACE(dir_bh, "get_write_access");
2432 ext4_journal_get_write_access(handle, dir_bh); 2479 ext4_journal_get_write_access(handle, dir_bh);
2433 PARENT_INO(dir_bh->b_data) = cpu_to_le32(new_dir->i_ino); 2480 PARENT_INO(dir_bh->b_data, new_dir->i_sb->s_blocksize) =
2481 cpu_to_le32(new_dir->i_ino);
2434 BUFFER_TRACE(dir_bh, "call ext4_handle_dirty_metadata"); 2482 BUFFER_TRACE(dir_bh, "call ext4_handle_dirty_metadata");
2435 ext4_handle_dirty_metadata(handle, old_dir, dir_bh); 2483 ext4_handle_dirty_metadata(handle, old_dir, dir_bh);
2436 ext4_dec_count(handle, old_dir); 2484 ext4_dec_count(handle, old_dir);
@@ -2449,6 +2497,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
2449 ext4_mark_inode_dirty(handle, new_inode); 2497 ext4_mark_inode_dirty(handle, new_inode);
2450 if (!new_inode->i_nlink) 2498 if (!new_inode->i_nlink)
2451 ext4_orphan_add(handle, new_inode); 2499 ext4_orphan_add(handle, new_inode);
2500 if (!test_opt(new_dir->i_sb, NO_AUTO_DA_ALLOC))
2501 force_da_alloc = 1;
2452 } 2502 }
2453 retval = 0; 2503 retval = 0;
2454 2504
@@ -2457,6 +2507,8 @@ end_rename:
2457 brelse(old_bh); 2507 brelse(old_bh);
2458 brelse(new_bh); 2508 brelse(new_bh);
2459 ext4_journal_stop(handle); 2509 ext4_journal_stop(handle);
2510 if (retval == 0 && force_da_alloc)
2511 ext4_alloc_da_blocks(old_inode);
2460 return retval; 2512 return retval;
2461} 2513}
2462 2514
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index c06886abd658..546c7dd869e1 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -938,10 +938,10 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
938 if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) { 938 if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
939 ext4_group_t flex_group; 939 ext4_group_t flex_group;
940 flex_group = ext4_flex_group(sbi, input->group); 940 flex_group = ext4_flex_group(sbi, input->group);
941 sbi->s_flex_groups[flex_group].free_blocks += 941 atomic_add(input->free_blocks_count,
942 input->free_blocks_count; 942 &sbi->s_flex_groups[flex_group].free_blocks);
943 sbi->s_flex_groups[flex_group].free_inodes += 943 atomic_add(EXT4_INODES_PER_GROUP(sb),
944 EXT4_INODES_PER_GROUP(sb); 944 &sbi->s_flex_groups[flex_group].free_inodes);
945 } 945 }
946 946
947 ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh); 947 ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index f7371a6a923d..9987bba99db3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -35,6 +35,7 @@
35#include <linux/quotaops.h> 35#include <linux/quotaops.h>
36#include <linux/seq_file.h> 36#include <linux/seq_file.h>
37#include <linux/proc_fs.h> 37#include <linux/proc_fs.h>
38#include <linux/ctype.h>
38#include <linux/marker.h> 39#include <linux/marker.h>
39#include <linux/log2.h> 40#include <linux/log2.h>
40#include <linux/crc16.h> 41#include <linux/crc16.h>
@@ -48,6 +49,7 @@
48#include "group.h" 49#include "group.h"
49 50
50struct proc_dir_entry *ext4_proc_root; 51struct proc_dir_entry *ext4_proc_root;
52static struct kset *ext4_kset;
51 53
52static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 54static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
53 unsigned long journal_devnum); 55 unsigned long journal_devnum);
@@ -577,9 +579,9 @@ static void ext4_put_super(struct super_block *sb)
577 ext4_commit_super(sb, es, 1); 579 ext4_commit_super(sb, es, 1);
578 } 580 }
579 if (sbi->s_proc) { 581 if (sbi->s_proc) {
580 remove_proc_entry("inode_readahead_blks", sbi->s_proc);
581 remove_proc_entry(sb->s_id, ext4_proc_root); 582 remove_proc_entry(sb->s_id, ext4_proc_root);
582 } 583 }
584 kobject_del(&sbi->s_kobj);
583 585
584 for (i = 0; i < sbi->s_gdb_count; i++) 586 for (i = 0; i < sbi->s_gdb_count; i++)
585 brelse(sbi->s_group_desc[i]); 587 brelse(sbi->s_group_desc[i]);
@@ -615,6 +617,17 @@ static void ext4_put_super(struct super_block *sb)
615 ext4_blkdev_remove(sbi); 617 ext4_blkdev_remove(sbi);
616 } 618 }
617 sb->s_fs_info = NULL; 619 sb->s_fs_info = NULL;
620 /*
621 * Now that we are completely done shutting down the
622 * superblock, we need to actually destroy the kobject.
623 */
624 unlock_kernel();
625 unlock_super(sb);
626 kobject_put(&sbi->s_kobj);
627 wait_for_completion(&sbi->s_kobj_unregister);
628 lock_super(sb);
629 lock_kernel();
630 kfree(sbi->s_blockgroup_lock);
618 kfree(sbi); 631 kfree(sbi);
619 return; 632 return;
620} 633}
@@ -803,8 +816,6 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
803 if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 816 if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL))
804 seq_puts(seq, ",noacl"); 817 seq_puts(seq, ",noacl");
805#endif 818#endif
806 if (!test_opt(sb, RESERVATION))
807 seq_puts(seq, ",noreservation");
808 if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 819 if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) {
809 seq_printf(seq, ",commit=%u", 820 seq_printf(seq, ",commit=%u",
810 (unsigned) (sbi->s_commit_interval / HZ)); 821 (unsigned) (sbi->s_commit_interval / HZ));
@@ -855,6 +866,9 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
855 if (test_opt(sb, DATA_ERR_ABORT)) 866 if (test_opt(sb, DATA_ERR_ABORT))
856 seq_puts(seq, ",data_err=abort"); 867 seq_puts(seq, ",data_err=abort");
857 868
869 if (test_opt(sb, NO_AUTO_DA_ALLOC))
870 seq_puts(seq, ",noauto_da_alloc");
871
858 ext4_show_quota_options(seq, sb); 872 ext4_show_quota_options(seq, sb);
859 return 0; 873 return 0;
860} 874}
@@ -1004,7 +1018,7 @@ enum {
1004 Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 1018 Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
1005 Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1019 Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov,
1006 Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 1020 Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
1007 Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, 1021 Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh,
1008 Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1022 Opt_commit, Opt_min_batch_time, Opt_max_batch_time,
1009 Opt_journal_update, Opt_journal_dev, 1023 Opt_journal_update, Opt_journal_dev,
1010 Opt_journal_checksum, Opt_journal_async_commit, 1024 Opt_journal_checksum, Opt_journal_async_commit,
@@ -1012,8 +1026,8 @@ enum {
1012 Opt_data_err_abort, Opt_data_err_ignore, 1026 Opt_data_err_abort, Opt_data_err_ignore,
1013 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 1027 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
1014 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 1028 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
1015 Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, 1029 Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize,
1016 Opt_grpquota, Opt_i_version, 1030 Opt_usrquota, Opt_grpquota, Opt_i_version,
1017 Opt_stripe, Opt_delalloc, Opt_nodelalloc, 1031 Opt_stripe, Opt_delalloc, Opt_nodelalloc,
1018 Opt_inode_readahead_blks, Opt_journal_ioprio 1032 Opt_inode_readahead_blks, Opt_journal_ioprio
1019}; 1033};
@@ -1039,8 +1053,6 @@ static const match_table_t tokens = {
1039 {Opt_nouser_xattr, "nouser_xattr"}, 1053 {Opt_nouser_xattr, "nouser_xattr"},
1040 {Opt_acl, "acl"}, 1054 {Opt_acl, "acl"},
1041 {Opt_noacl, "noacl"}, 1055 {Opt_noacl, "noacl"},
1042 {Opt_reservation, "reservation"},
1043 {Opt_noreservation, "noreservation"},
1044 {Opt_noload, "noload"}, 1056 {Opt_noload, "noload"},
1045 {Opt_nobh, "nobh"}, 1057 {Opt_nobh, "nobh"},
1046 {Opt_bh, "bh"}, 1058 {Opt_bh, "bh"},
@@ -1068,6 +1080,8 @@ static const match_table_t tokens = {
1068 {Opt_quota, "quota"}, 1080 {Opt_quota, "quota"},
1069 {Opt_usrquota, "usrquota"}, 1081 {Opt_usrquota, "usrquota"},
1070 {Opt_barrier, "barrier=%u"}, 1082 {Opt_barrier, "barrier=%u"},
1083 {Opt_barrier, "barrier"},
1084 {Opt_nobarrier, "nobarrier"},
1071 {Opt_i_version, "i_version"}, 1085 {Opt_i_version, "i_version"},
1072 {Opt_stripe, "stripe=%u"}, 1086 {Opt_stripe, "stripe=%u"},
1073 {Opt_resize, "resize"}, 1087 {Opt_resize, "resize"},
@@ -1075,6 +1089,9 @@ static const match_table_t tokens = {
1075 {Opt_nodelalloc, "nodelalloc"}, 1089 {Opt_nodelalloc, "nodelalloc"},
1076 {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1090 {Opt_inode_readahead_blks, "inode_readahead_blks=%u"},
1077 {Opt_journal_ioprio, "journal_ioprio=%u"}, 1091 {Opt_journal_ioprio, "journal_ioprio=%u"},
1092 {Opt_auto_da_alloc, "auto_da_alloc=%u"},
1093 {Opt_auto_da_alloc, "auto_da_alloc"},
1094 {Opt_noauto_da_alloc, "noauto_da_alloc"},
1078 {Opt_err, NULL}, 1095 {Opt_err, NULL},
1079}; 1096};
1080 1097
@@ -1207,12 +1224,6 @@ static int parse_options(char *options, struct super_block *sb,
1207 "not supported\n"); 1224 "not supported\n");
1208 break; 1225 break;
1209#endif 1226#endif
1210 case Opt_reservation:
1211 set_opt(sbi->s_mount_opt, RESERVATION);
1212 break;
1213 case Opt_noreservation:
1214 clear_opt(sbi->s_mount_opt, RESERVATION);
1215 break;
1216 case Opt_journal_update: 1227 case Opt_journal_update:
1217 /* @@@ FIXME */ 1228 /* @@@ FIXME */
1218 /* Eventually we will want to be able to create 1229 /* Eventually we will want to be able to create
@@ -1415,9 +1426,14 @@ set_qf_format:
1415 case Opt_abort: 1426 case Opt_abort:
1416 set_opt(sbi->s_mount_opt, ABORT); 1427 set_opt(sbi->s_mount_opt, ABORT);
1417 break; 1428 break;
1429 case Opt_nobarrier:
1430 clear_opt(sbi->s_mount_opt, BARRIER);
1431 break;
1418 case Opt_barrier: 1432 case Opt_barrier:
1419 if (match_int(&args[0], &option)) 1433 if (match_int(&args[0], &option)) {
1420 return 0; 1434 set_opt(sbi->s_mount_opt, BARRIER);
1435 break;
1436 }
1421 if (option) 1437 if (option)
1422 set_opt(sbi->s_mount_opt, BARRIER); 1438 set_opt(sbi->s_mount_opt, BARRIER);
1423 else 1439 else
@@ -1463,6 +1479,11 @@ set_qf_format:
1463 return 0; 1479 return 0;
1464 if (option < 0 || option > (1 << 30)) 1480 if (option < 0 || option > (1 << 30))
1465 return 0; 1481 return 0;
1482 if (option & (option - 1)) {
1483 printk(KERN_ERR "EXT4-fs: inode_readahead_blks"
1484 " must be a power of 2\n");
1485 return 0;
1486 }
1466 sbi->s_inode_readahead_blks = option; 1487 sbi->s_inode_readahead_blks = option;
1467 break; 1488 break;
1468 case Opt_journal_ioprio: 1489 case Opt_journal_ioprio:
@@ -1473,6 +1494,19 @@ set_qf_format:
1473 *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1494 *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE,
1474 option); 1495 option);
1475 break; 1496 break;
1497 case Opt_noauto_da_alloc:
1498 set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC);
1499 break;
1500 case Opt_auto_da_alloc:
1501 if (match_int(&args[0], &option)) {
1502 clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC);
1503 break;
1504 }
1505 if (option)
1506 clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC);
1507 else
1508 set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC);
1509 break;
1476 default: 1510 default:
1477 printk(KERN_ERR 1511 printk(KERN_ERR
1478 "EXT4-fs: Unrecognized mount option \"%s\" " 1512 "EXT4-fs: Unrecognized mount option \"%s\" "
@@ -1612,10 +1646,12 @@ static int ext4_fill_flex_info(struct super_block *sb)
1612 gdp = ext4_get_group_desc(sb, i, &bh); 1646 gdp = ext4_get_group_desc(sb, i, &bh);
1613 1647
1614 flex_group = ext4_flex_group(sbi, i); 1648 flex_group = ext4_flex_group(sbi, i);
1615 sbi->s_flex_groups[flex_group].free_inodes += 1649 atomic_set(&sbi->s_flex_groups[flex_group].free_inodes,
1616 ext4_free_inodes_count(sb, gdp); 1650 ext4_free_inodes_count(sb, gdp));
1617 sbi->s_flex_groups[flex_group].free_blocks += 1651 atomic_set(&sbi->s_flex_groups[flex_group].free_blocks,
1618 ext4_free_blks_count(sb, gdp); 1652 ext4_free_blks_count(sb, gdp));
1653 atomic_set(&sbi->s_flex_groups[flex_group].used_dirs,
1654 ext4_used_dirs_count(sb, gdp));
1619 } 1655 }
1620 1656
1621 return 1; 1657 return 1;
@@ -1991,6 +2027,181 @@ static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi)
1991 return 0; 2027 return 0;
1992} 2028}
1993 2029
2030/* sysfs supprt */
2031
2032struct ext4_attr {
2033 struct attribute attr;
2034 ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *);
2035 ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *,
2036 const char *, size_t);
2037 int offset;
2038};
2039
2040static int parse_strtoul(const char *buf,
2041 unsigned long max, unsigned long *value)
2042{
2043 char *endp;
2044
2045 while (*buf && isspace(*buf))
2046 buf++;
2047 *value = simple_strtoul(buf, &endp, 0);
2048 while (*endp && isspace(*endp))
2049 endp++;
2050 if (*endp || *value > max)
2051 return -EINVAL;
2052
2053 return 0;
2054}
2055
2056static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a,
2057 struct ext4_sb_info *sbi,
2058 char *buf)
2059{
2060 return snprintf(buf, PAGE_SIZE, "%llu\n",
2061 (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter));
2062}
2063
2064static ssize_t session_write_kbytes_show(struct ext4_attr *a,
2065 struct ext4_sb_info *sbi, char *buf)
2066{
2067 struct super_block *sb = sbi->s_buddy_cache->i_sb;
2068
2069 return snprintf(buf, PAGE_SIZE, "%lu\n",
2070 (part_stat_read(sb->s_bdev->bd_part, sectors[1]) -
2071 sbi->s_sectors_written_start) >> 1);
2072}
2073
2074static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a,
2075 struct ext4_sb_info *sbi, char *buf)
2076{
2077 struct super_block *sb = sbi->s_buddy_cache->i_sb;
2078
2079 return snprintf(buf, PAGE_SIZE, "%llu\n",
2080 sbi->s_kbytes_written +
2081 ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) -
2082 EXT4_SB(sb)->s_sectors_written_start) >> 1));
2083}
2084
2085static ssize_t inode_readahead_blks_store(struct ext4_attr *a,
2086 struct ext4_sb_info *sbi,
2087 const char *buf, size_t count)
2088{
2089 unsigned long t;
2090
2091 if (parse_strtoul(buf, 0x40000000, &t))
2092 return -EINVAL;
2093
2094 /* inode_readahead_blks must be a power of 2 */
2095 if (t & (t-1))
2096 return -EINVAL;
2097
2098 sbi->s_inode_readahead_blks = t;
2099 return count;
2100}
2101
2102static ssize_t sbi_ui_show(struct ext4_attr *a,
2103 struct ext4_sb_info *sbi, char *buf)
2104{
2105 unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset);
2106
2107 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
2108}
2109
2110static ssize_t sbi_ui_store(struct ext4_attr *a,
2111 struct ext4_sb_info *sbi,
2112 const char *buf, size_t count)
2113{
2114 unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset);
2115 unsigned long t;
2116
2117 if (parse_strtoul(buf, 0xffffffff, &t))
2118 return -EINVAL;
2119 *ui = t;
2120 return count;
2121}
2122
2123#define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \
2124static struct ext4_attr ext4_attr_##_name = { \
2125 .attr = {.name = __stringify(_name), .mode = _mode }, \
2126 .show = _show, \
2127 .store = _store, \
2128 .offset = offsetof(struct ext4_sb_info, _elname), \
2129}
2130#define EXT4_ATTR(name, mode, show, store) \
2131static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store)
2132
2133#define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL)
2134#define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store)
2135#define EXT4_RW_ATTR_SBI_UI(name, elname) \
2136 EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname)
2137#define ATTR_LIST(name) &ext4_attr_##name.attr
2138
2139EXT4_RO_ATTR(delayed_allocation_blocks);
2140EXT4_RO_ATTR(session_write_kbytes);
2141EXT4_RO_ATTR(lifetime_write_kbytes);
2142EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show,
2143 inode_readahead_blks_store, s_inode_readahead_blks);
2144EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats);
2145EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan);
2146EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan);
2147EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs);
2148EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request);
2149EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc);
2150
2151static struct attribute *ext4_attrs[] = {
2152 ATTR_LIST(delayed_allocation_blocks),
2153 ATTR_LIST(session_write_kbytes),
2154 ATTR_LIST(lifetime_write_kbytes),
2155 ATTR_LIST(inode_readahead_blks),
2156 ATTR_LIST(mb_stats),
2157 ATTR_LIST(mb_max_to_scan),
2158 ATTR_LIST(mb_min_to_scan),
2159 ATTR_LIST(mb_order2_req),
2160 ATTR_LIST(mb_stream_req),
2161 ATTR_LIST(mb_group_prealloc),
2162 NULL,
2163};
2164
2165static ssize_t ext4_attr_show(struct kobject *kobj,
2166 struct attribute *attr, char *buf)
2167{
2168 struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
2169 s_kobj);
2170 struct ext4_attr *a = container_of(attr, struct ext4_attr, attr);
2171
2172 return a->show ? a->show(a, sbi, buf) : 0;
2173}
2174
2175static ssize_t ext4_attr_store(struct kobject *kobj,
2176 struct attribute *attr,
2177 const char *buf, size_t len)
2178{
2179 struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
2180 s_kobj);
2181 struct ext4_attr *a = container_of(attr, struct ext4_attr, attr);
2182
2183 return a->store ? a->store(a, sbi, buf, len) : 0;
2184}
2185
2186static void ext4_sb_release(struct kobject *kobj)
2187{
2188 struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
2189 s_kobj);
2190 complete(&sbi->s_kobj_unregister);
2191}
2192
2193
2194static struct sysfs_ops ext4_attr_ops = {
2195 .show = ext4_attr_show,
2196 .store = ext4_attr_store,
2197};
2198
2199static struct kobj_type ext4_ktype = {
2200 .default_attrs = ext4_attrs,
2201 .sysfs_ops = &ext4_attr_ops,
2202 .release = ext4_sb_release,
2203};
2204
1994static int ext4_fill_super(struct super_block *sb, void *data, int silent) 2205static int ext4_fill_super(struct super_block *sb, void *data, int silent)
1995 __releases(kernel_lock) 2206 __releases(kernel_lock)
1996 __acquires(kernel_lock) 2207 __acquires(kernel_lock)
@@ -2021,12 +2232,21 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
2021 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2232 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
2022 if (!sbi) 2233 if (!sbi)
2023 return -ENOMEM; 2234 return -ENOMEM;
2235
2236 sbi->s_blockgroup_lock =
2237 kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
2238 if (!sbi->s_blockgroup_lock) {
2239 kfree(sbi);
2240 return -ENOMEM;
2241 }
2024 sb->s_fs_info = sbi; 2242 sb->s_fs_info = sbi;
2025 sbi->s_mount_opt = 0; 2243 sbi->s_mount_opt = 0;
2026 sbi->s_resuid = EXT4_DEF_RESUID; 2244 sbi->s_resuid = EXT4_DEF_RESUID;
2027 sbi->s_resgid = EXT4_DEF_RESGID; 2245 sbi->s_resgid = EXT4_DEF_RESGID;
2028 sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2246 sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;
2029 sbi->s_sb_block = sb_block; 2247 sbi->s_sb_block = sb_block;
2248 sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part,
2249 sectors[1]);
2030 2250
2031 unlock_kernel(); 2251 unlock_kernel();
2032 2252
@@ -2064,6 +2284,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
2064 sb->s_magic = le16_to_cpu(es->s_magic); 2284 sb->s_magic = le16_to_cpu(es->s_magic);
2065 if (sb->s_magic != EXT4_SUPER_MAGIC) 2285 if (sb->s_magic != EXT4_SUPER_MAGIC)
2066 goto cantfind_ext4; 2286 goto cantfind_ext4;
2287 sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written);
2067 2288
2068 /* Set defaults before we parse the mount options */ 2289 /* Set defaults before we parse the mount options */
2069 def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2290 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
@@ -2101,7 +2322,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
2101 sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 2322 sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME;
2102 sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2323 sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME;
2103 2324
2104 set_opt(sbi->s_mount_opt, RESERVATION);
2105 set_opt(sbi->s_mount_opt, BARRIER); 2325 set_opt(sbi->s_mount_opt, BARRIER);
2106 2326
2107 /* 2327 /*
@@ -2325,14 +2545,9 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
2325#ifdef CONFIG_PROC_FS 2545#ifdef CONFIG_PROC_FS
2326 if (ext4_proc_root) 2546 if (ext4_proc_root)
2327 sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 2547 sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root);
2328
2329 if (sbi->s_proc)
2330 proc_create_data("inode_readahead_blks", 0644, sbi->s_proc,
2331 &ext4_ui_proc_fops,
2332 &sbi->s_inode_readahead_blks);
2333#endif 2548#endif
2334 2549
2335 bgl_lock_init(&sbi->s_blockgroup_lock); 2550 bgl_lock_init(sbi->s_blockgroup_lock);
2336 2551
2337 for (i = 0; i < db_count; i++) { 2552 for (i = 0; i < db_count; i++) {
2338 block = descriptor_loc(sb, logical_sb_block, i); 2553 block = descriptor_loc(sb, logical_sb_block, i);
@@ -2564,6 +2779,16 @@ no_journal:
2564 goto failed_mount4; 2779 goto failed_mount4;
2565 } 2780 }
2566 2781
2782 sbi->s_kobj.kset = ext4_kset;
2783 init_completion(&sbi->s_kobj_unregister);
2784 err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL,
2785 "%s", sb->s_id);
2786 if (err) {
2787 ext4_mb_release(sb);
2788 ext4_ext_release(sb);
2789 goto failed_mount4;
2790 };
2791
2567 /* 2792 /*
2568 * akpm: core read_super() calls in here with the superblock locked. 2793 * akpm: core read_super() calls in here with the superblock locked.
2569 * That deadlocks, because orphan cleanup needs to lock the superblock 2794 * That deadlocks, because orphan cleanup needs to lock the superblock
@@ -2618,7 +2843,6 @@ failed_mount2:
2618 kfree(sbi->s_group_desc); 2843 kfree(sbi->s_group_desc);
2619failed_mount: 2844failed_mount:
2620 if (sbi->s_proc) { 2845 if (sbi->s_proc) {
2621 remove_proc_entry("inode_readahead_blks", sbi->s_proc);
2622 remove_proc_entry(sb->s_id, ext4_proc_root); 2846 remove_proc_entry(sb->s_id, ext4_proc_root);
2623 } 2847 }
2624#ifdef CONFIG_QUOTA 2848#ifdef CONFIG_QUOTA
@@ -2913,6 +3137,10 @@ static int ext4_commit_super(struct super_block *sb,
2913 set_buffer_uptodate(sbh); 3137 set_buffer_uptodate(sbh);
2914 } 3138 }
2915 es->s_wtime = cpu_to_le32(get_seconds()); 3139 es->s_wtime = cpu_to_le32(get_seconds());
3140 es->s_kbytes_written =
3141 cpu_to_le64(EXT4_SB(sb)->s_kbytes_written +
3142 ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) -
3143 EXT4_SB(sb)->s_sectors_written_start) >> 1));
2916 ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 3144 ext4_free_blocks_count_set(es, percpu_counter_sum_positive(
2917 &EXT4_SB(sb)->s_freeblocks_counter)); 3145 &EXT4_SB(sb)->s_freeblocks_counter));
2918 es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 3146 es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive(
@@ -3647,45 +3875,6 @@ static int ext4_get_sb(struct file_system_type *fs_type,
3647 return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 3875 return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt);
3648} 3876}
3649 3877
3650#ifdef CONFIG_PROC_FS
3651static int ext4_ui_proc_show(struct seq_file *m, void *v)
3652{
3653 unsigned int *p = m->private;
3654
3655 seq_printf(m, "%u\n", *p);
3656 return 0;
3657}
3658
3659static int ext4_ui_proc_open(struct inode *inode, struct file *file)
3660{
3661 return single_open(file, ext4_ui_proc_show, PDE(inode)->data);
3662}
3663
3664static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf,
3665 size_t cnt, loff_t *ppos)
3666{
3667 unsigned long *p = PDE(file->f_path.dentry->d_inode)->data;
3668 char str[32];
3669
3670 if (cnt >= sizeof(str))
3671 return -EINVAL;
3672 if (copy_from_user(str, buf, cnt))
3673 return -EFAULT;
3674
3675 *p = simple_strtoul(str, NULL, 0);
3676 return cnt;
3677}
3678
3679const struct file_operations ext4_ui_proc_fops = {
3680 .owner = THIS_MODULE,
3681 .open = ext4_ui_proc_open,
3682 .read = seq_read,
3683 .llseek = seq_lseek,
3684 .release = single_release,
3685 .write = ext4_ui_proc_write,
3686};
3687#endif
3688
3689static struct file_system_type ext4_fs_type = { 3878static struct file_system_type ext4_fs_type = {
3690 .owner = THIS_MODULE, 3879 .owner = THIS_MODULE,
3691 .name = "ext4", 3880 .name = "ext4",
@@ -3719,6 +3908,9 @@ static int __init init_ext4_fs(void)
3719{ 3908{
3720 int err; 3909 int err;
3721 3910
3911 ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj);
3912 if (!ext4_kset)
3913 return -ENOMEM;
3722 ext4_proc_root = proc_mkdir("fs/ext4", NULL); 3914 ext4_proc_root = proc_mkdir("fs/ext4", NULL);
3723 err = init_ext4_mballoc(); 3915 err = init_ext4_mballoc();
3724 if (err) 3916 if (err)
@@ -3760,6 +3952,7 @@ static void __exit exit_ext4_fs(void)
3760 exit_ext4_xattr(); 3952 exit_ext4_xattr();
3761 exit_ext4_mballoc(); 3953 exit_ext4_mballoc();
3762 remove_proc_entry("fs/ext4", NULL); 3954 remove_proc_entry("fs/ext4", NULL);
3955 kset_unregister(ext4_kset);
3763} 3956}
3764 3957
3765MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 3958MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-14 10:54:25 -0500