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-rw-r--r--Documentation/ABI/testing/sysfs-fs-ext481
-rw-r--r--Documentation/filesystems/ext4.txt30
-rw-r--r--Documentation/filesystems/proc.txt21
-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
-rw-r--r--fs/jbd2/commit.c5
-rw-r--r--fs/jbd2/revoke.c24
-rw-r--r--fs/jbd2/transaction.c2
-rw-r--r--include/linux/jbd2.h6
23 files changed, 1224 insertions, 600 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-ext4 b/Documentation/ABI/testing/sysfs-fs-ext4
new file mode 100644
index 00000000000..4e79074de28
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-fs-ext4
@@ -0,0 +1,81 @@
1What: /sys/fs/ext4/<disk>/mb_stats
2Date: March 2008
3Contact: "Theodore Ts'o" <tytso@mit.edu>
4Description:
5 Controls whether the multiblock allocator should
6 collect statistics, which are shown during the unmount.
7 1 means to collect statistics, 0 means not to collect
8 statistics
9
10What: /sys/fs/ext4/<disk>/mb_group_prealloc
11Date: March 2008
12Contact: "Theodore Ts'o" <tytso@mit.edu>
13Description:
14 The multiblock allocator will round up allocation
15 requests to a multiple of this tuning parameter if the
16 stripe size is not set in the ext4 superblock
17
18What: /sys/fs/ext4/<disk>/mb_max_to_scan
19Date: March 2008
20Contact: "Theodore Ts'o" <tytso@mit.edu>
21Description:
22 The maximum number of extents the multiblock allocator
23 will search to find the best extent
24
25What: /sys/fs/ext4/<disk>/mb_min_to_scan
26Date: March 2008
27Contact: "Theodore Ts'o" <tytso@mit.edu>
28Description:
29 The minimum number of extents the multiblock allocator
30 will search to find the best extent
31
32What: /sys/fs/ext4/<disk>/mb_order2_req
33Date: March 2008
34Contact: "Theodore Ts'o" <tytso@mit.edu>
35Description:
36 Tuning parameter which controls the minimum size for
37 requests (as a power of 2) where the buddy cache is
38 used
39
40What: /sys/fs/ext4/<disk>/mb_stream_req
41Date: March 2008
42Contact: "Theodore Ts'o" <tytso@mit.edu>
43Description:
44 Files which have fewer blocks than this tunable
45 parameter will have their blocks allocated out of a
46 block group specific preallocation pool, so that small
47 files are packed closely together. Each large file
48 will have its blocks allocated out of its own unique
49 preallocation pool.
50
51What: /sys/fs/ext4/<disk>/inode_readahead
52Date: March 2008
53Contact: "Theodore Ts'o" <tytso@mit.edu>
54Description:
55 Tuning parameter which controls the maximum number of
56 inode table blocks that ext4's inode table readahead
57 algorithm will pre-read into the buffer cache
58
59What: /sys/fs/ext4/<disk>/delayed_allocation_blocks
60Date: March 2008
61Contact: "Theodore Ts'o" <tytso@mit.edu>
62Description:
63 This file is read-only and shows the number of blocks
64 that are dirty in the page cache, but which do not
65 have their location in the filesystem allocated yet.
66
67What: /sys/fs/ext4/<disk>/lifetime_write_kbytes
68Date: March 2008
69Contact: "Theodore Ts'o" <tytso@mit.edu>
70Description:
71 This file is read-only and shows the number of kilobytes
72 of data that have been written to this filesystem since it was
73 created.
74
75What: /sys/fs/ext4/<disk>/session_write_kbytes
76Date: March 2008
77Contact: "Theodore Ts'o" <tytso@mit.edu>
78Description:
79 This file is read-only and shows the number of
80 kilobytes of data that have been written to this
81 filesystem since it was mounted.
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index cec829bc729..97882df0486 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -85,7 +85,7 @@ Note: More extensive information for getting started with ext4 can be
85* extent format more robust in face of on-disk corruption due to magics, 85* extent format more robust in face of on-disk corruption due to magics,
86* internal redundancy in tree 86* internal redundancy in tree
87* improved file allocation (multi-block alloc) 87* improved file allocation (multi-block alloc)
88* fix 32000 subdirectory limit 88* lift 32000 subdirectory limit imposed by i_links_count[1]
89* nsec timestamps for mtime, atime, ctime, create time 89* nsec timestamps for mtime, atime, ctime, create time
90* inode version field on disk (NFSv4, Lustre) 90* inode version field on disk (NFSv4, Lustre)
91* reduced e2fsck time via uninit_bg feature 91* reduced e2fsck time via uninit_bg feature
@@ -100,6 +100,9 @@ Note: More extensive information for getting started with ext4 can be
100* efficent new ordered mode in JBD2 and ext4(avoid using buffer head to force 100* efficent new ordered mode in JBD2 and ext4(avoid using buffer head to force
101 the ordering) 101 the ordering)
102 102
103[1] Filesystems with a block size of 1k may see a limit imposed by the
104directory hash tree having a maximum depth of two.
105
1032.2 Candidate features for future inclusion 1062.2 Candidate features for future inclusion
104 107
105* Online defrag (patches available but not well tested) 108* Online defrag (patches available but not well tested)
@@ -180,8 +183,8 @@ commit=nrsec (*) Ext4 can be told to sync all its data and metadata
180 performance. 183 performance.
181 184
182barrier=<0|1(*)> This enables/disables the use of write barriers in 185barrier=<0|1(*)> This enables/disables the use of write barriers in
183 the jbd code. barrier=0 disables, barrier=1 enables. 186barrier(*) the jbd code. barrier=0 disables, barrier=1 enables.
184 This also requires an IO stack which can support 187nobarrier This also requires an IO stack which can support
185 barriers, and if jbd gets an error on a barrier 188 barriers, and if jbd gets an error on a barrier
186 write, it will disable again with a warning. 189 write, it will disable again with a warning.
187 Write barriers enforce proper on-disk ordering 190 Write barriers enforce proper on-disk ordering
@@ -189,6 +192,9 @@ barrier=<0|1(*)> This enables/disables the use of write barriers in
189 safe to use, at some performance penalty. If 192 safe to use, at some performance penalty. If
190 your disks are battery-backed in one way or another, 193 your disks are battery-backed in one way or another,
191 disabling barriers may safely improve performance. 194 disabling barriers may safely improve performance.
195 The mount options "barrier" and "nobarrier" can
196 also be used to enable or disable barriers, for
197 consistency with other ext4 mount options.
192 198
193inode_readahead=n This tuning parameter controls the maximum 199inode_readahead=n This tuning parameter controls the maximum
194 number of inode table blocks that ext4's inode 200 number of inode table blocks that ext4's inode
@@ -310,6 +316,24 @@ journal_ioprio=prio The I/O priority (from 0 to 7, where 0 is the
310 a slightly higher priority than the default I/O 316 a slightly higher priority than the default I/O
311 priority. 317 priority.
312 318
319auto_da_alloc(*) Many broken applications don't use fsync() when
320noauto_da_alloc replacing existing files via patterns such as
321 fd = open("foo.new")/write(fd,..)/close(fd)/
322 rename("foo.new", "foo"), or worse yet,
323 fd = open("foo", O_TRUNC)/write(fd,..)/close(fd).
324 If auto_da_alloc is enabled, ext4 will detect
325 the replace-via-rename and replace-via-truncate
326 patterns and force that any delayed allocation
327 blocks are allocated such that at the next
328 journal commit, in the default data=ordered
329 mode, the data blocks of the new file are forced
330 to disk before the rename() operation is
331 commited. This provides roughly the same level
332 of guarantees as ext3, and avoids the
333 "zero-length" problem that can happen when a
334 system crashes before the delayed allocation
335 blocks are forced to disk.
336
313Data Mode 337Data Mode
314========= 338=========
315There are 3 different data modes: 339There are 3 different data modes:
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 830bad7cce0..efc4fd9f40c 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -940,27 +940,6 @@ Table 1-10: Files in /proc/fs/ext4/<devname>
940 File Content 940 File Content
941 mb_groups details of multiblock allocator buddy cache of free blocks 941 mb_groups details of multiblock allocator buddy cache of free blocks
942 mb_history multiblock allocation history 942 mb_history multiblock allocation history
943 stats controls whether the multiblock allocator should start
944 collecting statistics, which are shown during the unmount
945 group_prealloc the multiblock allocator will round up allocation
946 requests to a multiple of this tuning parameter if the
947 stripe size is not set in the ext4 superblock
948 max_to_scan The maximum number of extents the multiblock allocator
949 will search to find the best extent
950 min_to_scan The minimum number of extents the multiblock allocator
951 will search to find the best extent
952 order2_req Tuning parameter which controls the minimum size for
953 requests (as a power of 2) where the buddy cache is
954 used
955 stream_req Files which have fewer blocks than this tunable
956 parameter will have their blocks allocated out of a
957 block group specific preallocation pool, so that small
958 files are packed closely together. Each large file
959 will have its blocks allocated out of its own unique
960 preallocation pool.
961inode_readahead Tuning parameter which controls the maximum number of
962 inode table blocks that ext4's inode table readahead
963 algorithm will pre-read into the buffer cache
964.............................................................................. 943..............................................................................
965 944
966 945
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 38f40d55899..53c72ad8587 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 2df2e40b01a..b64789929a6 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 990c9400092..d0f15ef56de 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 18cb67b2cbb..f0c3ec85bd4 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 e69acc16f5c..4ce2187123a 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 039b6ea1a04..57b71fefbcc 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 e0aa4fe4f59..ac77d8b8251 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 f731cb545a0..588af8c7724 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 fb51b40e3e8..47b84e8df56 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 dd82ff39006..a2e7952bc5f 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 42dc83fb247..91e75f7a9e7 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 b038188bd03..f871677a798 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 10a2921baf1..dd9e6cd5f6c 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 83410244d3e..22098e1cd08 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 c06886abd65..546c7dd869e 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 f7371a6a923..9987bba99db 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");
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 62804e57a44..4ea72377c7a 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -367,6 +367,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
367 int tag_bytes = journal_tag_bytes(journal); 367 int tag_bytes = journal_tag_bytes(journal);
368 struct buffer_head *cbh = NULL; /* For transactional checksums */ 368 struct buffer_head *cbh = NULL; /* For transactional checksums */
369 __u32 crc32_sum = ~0; 369 __u32 crc32_sum = ~0;
370 int write_op = WRITE;
370 371
371 /* 372 /*
372 * First job: lock down the current transaction and wait for 373 * First job: lock down the current transaction and wait for
@@ -401,6 +402,8 @@ void jbd2_journal_commit_transaction(journal_t *journal)
401 spin_lock(&journal->j_state_lock); 402 spin_lock(&journal->j_state_lock);
402 commit_transaction->t_state = T_LOCKED; 403 commit_transaction->t_state = T_LOCKED;
403 404
405 if (commit_transaction->t_synchronous_commit)
406 write_op = WRITE_SYNC;
404 stats.u.run.rs_wait = commit_transaction->t_max_wait; 407 stats.u.run.rs_wait = commit_transaction->t_max_wait;
405 stats.u.run.rs_locked = jiffies; 408 stats.u.run.rs_locked = jiffies;
406 stats.u.run.rs_running = jbd2_time_diff(commit_transaction->t_start, 409 stats.u.run.rs_running = jbd2_time_diff(commit_transaction->t_start,
@@ -680,7 +683,7 @@ start_journal_io:
680 clear_buffer_dirty(bh); 683 clear_buffer_dirty(bh);
681 set_buffer_uptodate(bh); 684 set_buffer_uptodate(bh);
682 bh->b_end_io = journal_end_buffer_io_sync; 685 bh->b_end_io = journal_end_buffer_io_sync;
683 submit_bh(WRITE, bh); 686 submit_bh(write_op, bh);
684 } 687 }
685 cond_resched(); 688 cond_resched();
686 stats.u.run.rs_blocks_logged += bufs; 689 stats.u.run.rs_blocks_logged += bufs;
diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c
index 257ff262576..bbe6d592d8b 100644
--- a/fs/jbd2/revoke.c
+++ b/fs/jbd2/revoke.c
@@ -55,6 +55,25 @@
55 * need do nothing. 55 * need do nothing.
56 * RevokeValid set, Revoked set: 56 * RevokeValid set, Revoked set:
57 * buffer has been revoked. 57 * buffer has been revoked.
58 *
59 * Locking rules:
60 * We keep two hash tables of revoke records. One hashtable belongs to the
61 * running transaction (is pointed to by journal->j_revoke), the other one
62 * belongs to the committing transaction. Accesses to the second hash table
63 * happen only from the kjournald and no other thread touches this table. Also
64 * journal_switch_revoke_table() which switches which hashtable belongs to the
65 * running and which to the committing transaction is called only from
66 * kjournald. Therefore we need no locks when accessing the hashtable belonging
67 * to the committing transaction.
68 *
69 * All users operating on the hash table belonging to the running transaction
70 * have a handle to the transaction. Therefore they are safe from kjournald
71 * switching hash tables under them. For operations on the lists of entries in
72 * the hash table j_revoke_lock is used.
73 *
74 * Finally, also replay code uses the hash tables but at this moment noone else
75 * can touch them (filesystem isn't mounted yet) and hence no locking is
76 * needed.
58 */ 77 */
59 78
60#ifndef __KERNEL__ 79#ifndef __KERNEL__
@@ -401,8 +420,6 @@ int jbd2_journal_revoke(handle_t *handle, unsigned long long blocknr,
401 * the second time we would still have a pending revoke to cancel. So, 420 * the second time we would still have a pending revoke to cancel. So,
402 * do not trust the Revoked bit on buffers unless RevokeValid is also 421 * do not trust the Revoked bit on buffers unless RevokeValid is also
403 * set. 422 * set.
404 *
405 * The caller must have the journal locked.
406 */ 423 */
407int jbd2_journal_cancel_revoke(handle_t *handle, struct journal_head *jh) 424int jbd2_journal_cancel_revoke(handle_t *handle, struct journal_head *jh)
408{ 425{
@@ -480,10 +497,7 @@ void jbd2_journal_switch_revoke_table(journal_t *journal)
480/* 497/*
481 * Write revoke records to the journal for all entries in the current 498 * Write revoke records to the journal for all entries in the current
482 * revoke hash, deleting the entries as we go. 499 * revoke hash, deleting the entries as we go.
483 *
484 * Called with the journal lock held.
485 */ 500 */
486
487void jbd2_journal_write_revoke_records(journal_t *journal, 501void jbd2_journal_write_revoke_records(journal_t *journal,
488 transaction_t *transaction) 502 transaction_t *transaction)
489{ 503{
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index 28ce21d8598..996ffda06bf 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -1315,6 +1315,8 @@ int jbd2_journal_stop(handle_t *handle)
1315 } 1315 }
1316 } 1316 }
1317 1317
1318 if (handle->h_sync)
1319 transaction->t_synchronous_commit = 1;
1318 current->journal_info = NULL; 1320 current->journal_info = NULL;
1319 spin_lock(&journal->j_state_lock); 1321 spin_lock(&journal->j_state_lock);
1320 spin_lock(&transaction->t_handle_lock); 1322 spin_lock(&transaction->t_handle_lock);
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 4d248b3f132..8815a3456b3 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -649,6 +649,12 @@ struct transaction_s
649 int t_handle_count; 649 int t_handle_count;
650 650
651 /* 651 /*
652 * This transaction is being forced and some process is
653 * waiting for it to finish.
654 */
655 int t_synchronous_commit:1;
656
657 /*
652 * For use by the filesystem to store fs-specific data 658 * For use by the filesystem to store fs-specific data
653 * structures associated with the transaction 659 * structures associated with the transaction
654 */ 660 */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-29 04:53:28 -0500