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Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (57 commits)
  jbd2: Fix oops in jbd2_journal_init_inode() on corrupted fs
  ext4: Remove "extents" mount option
  block: Add Kconfig help which notes that ext4 needs CONFIG_LBD
  ext4: Make printk's consistently prefixed with "EXT4-fs: "
  ext4: Add sanity checks for the superblock before mounting the filesystem
  ext4: Add mount option to set kjournald's I/O priority
  jbd2: Submit writes to the journal using WRITE_SYNC
  jbd2: Add pid and journal device name to the "kjournald2 starting" message
  ext4: Add markers for better debuggability
  ext4: Remove code to create the journal inode
  ext4: provide function to release metadata pages under memory pressure
  ext3: provide function to release metadata pages under memory pressure
  add releasepage hooks to block devices which can be used by file systems
  ext4: Fix s_dirty_blocks_counter if block allocation failed with nodelalloc
  ext4: Init the complete page while building buddy cache
  ext4: Don't allow new groups to be added during block allocation
  ext4: mark the blocks/inode bitmap beyond end of group as used
  ext4: Use new buffer_head flag to check uninit group bitmaps initialization
  ext4: Fix the race between read_inode_bitmap() and ext4_new_inode()
  ext4: code cleanup
  ...
This commit is contained in:
Linus Torvalds 2009-01-08 17:14:59 -08:00
Родитель cd764695b6 4b905671d2
Коммит 2150edc6c5
39 изменённых файлов: 2275 добавлений и 1305 удалений
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85
Documentation/filesystems/ext4.txt
Просмотреть файл

@ -58,13 +58,22 @@ Note: More extensive information for getting started with ext4 can be
# mount -t ext4 /dev/hda1 /wherever
- When comparing performance with other filesystems, remember that
ext3/4 by default offers higher data integrity guarantees than most.
So when comparing with a metadata-only journalling filesystem, such
as ext3, use `mount -o data=writeback'. And you might as well use
`mount -o nobh' too along with it. Making the journal larger than
the mke2fs default often helps performance with metadata-intensive
workloads.
- When comparing performance with other filesystems, it's always
important to try multiple workloads; very often a subtle change in a
workload parameter can completely change the ranking of which
filesystems do well compared to others. When comparing versus ext3,
note that ext4 enables write barriers by default, while ext3 does
not enable write barriers by default. So it is useful to use
explicitly specify whether barriers are enabled or not when via the
'-o barriers=[0|1]' mount option for both ext3 and ext4 filesystems
for a fair comparison. When tuning ext3 for best benchmark numbers,
it is often worthwhile to try changing the data journaling mode; '-o
data=writeback,nobh' can be faster for some workloads. (Note
however that running mounted with data=writeback can potentially
leave stale data exposed in recently written files in case of an
unclean shutdown, which could be a security exposure in some
situations.) Configuring the filesystem with a large journal can
also be helpful for metadata-intensive workloads.
2. Features
===========
@ -74,7 +83,7 @@ Note: More extensive information for getting started with ext4 can be
* ability to use filesystems > 16TB (e2fsprogs support not available yet)
* extent format reduces metadata overhead (RAM, IO for access, transactions)
* extent format more robust in face of on-disk corruption due to magics,
* internal redunancy in tree
* internal redundancy in tree
* improved file allocation (multi-block alloc)
* fix 32000 subdirectory limit
* nsec timestamps for mtime, atime, ctime, create time
@ -116,10 +125,11 @@ grouping of bitmaps and inode tables. Some test results available here:
When mounting an ext4 filesystem, the following option are accepted:
(*) == default
extents (*) ext4 will use extents to address file data. The
file system will no longer be mountable by ext3.
noextents ext4 will not use extents for newly created files
ro Mount filesystem read only. Note that ext4 will
replay the journal (and thus write to the
partition) even when mounted "read only". The
mount options "ro,noload" can be used to prevent
writes to the filesystem.
journal_checksum Enable checksumming of the journal transactions.
This will allow the recovery code in e2fsck and the
@ -134,17 +144,17 @@ journal_async_commit Commit block can be written to disk without waiting
journal=update Update the ext4 file system's journal to the current
format.
journal=inum When a journal already exists, this option is ignored.
Otherwise, it specifies the number of the inode which
will represent the ext4 file system's journal file.
journal_dev=devnum When the external journal device's major/minor numbers
have changed, this option allows the user to specify
the new journal location. The journal device is
identified through its new major/minor numbers encoded
in devnum.
noload Don't load the journal on mounting.
noload Don't load the journal on mounting. Note that
if the filesystem was not unmounted cleanly,
skipping the journal replay will lead to the
filesystem containing inconsistencies that can
lead to any number of problems.
data=journal All data are committed into the journal prior to being
written into the main file system.
@ -219,9 +229,12 @@ minixdf Make 'df' act like Minix.
debug Extra debugging information is sent to syslog.
errors=remount-ro(*) Remount the filesystem read-only on an error.
errors=remount-ro Remount the filesystem read-only on an error.
errors=continue Keep going on a filesystem error.
errors=panic Panic and halt the machine if an error occurs.
(These mount options override the errors behavior
specified in the superblock, which can be configured
using tune2fs)
data_err=ignore(*) Just print an error message if an error occurs
in a file data buffer in ordered mode.
@ -261,6 +274,42 @@ delalloc (*) Deferring block allocation until write-out time.
nodelalloc Disable delayed allocation. Blocks are allocation
when data is copied from user to page cache.
max_batch_time=usec Maximum amount of time ext4 should wait for
additional filesystem operations to be batch
together with a synchronous write operation.
Since a synchronous write operation is going to
force a commit and then a wait for the I/O
complete, it doesn't cost much, and can be a
huge throughput win, we wait for a small amount
of time to see if any other transactions can
piggyback on the synchronous write. The
algorithm used is designed to automatically tune
for the speed of the disk, by measuring the
amount of time (on average) that it takes to
finish committing a transaction. Call this time
the "commit time". If the time that the
transactoin has been running is less than the
commit time, ext4 will try sleeping for the
commit time to see if other operations will join
the transaction. The commit time is capped by
the max_batch_time, which defaults to 15000us
(15ms). This optimization can be turned off
entirely by setting max_batch_time to 0.
min_batch_time=usec This parameter sets the commit time (as
described above) to be at least min_batch_time.
It defaults to zero microseconds. Increasing
this parameter may improve the throughput of
multi-threaded, synchronous workloads on very
fast disks, at the cost of increasing latency.
journal_ioprio=prio The I/O priority (from 0 to 7, where 0 is the
highest priorty) which should be used for I/O
operations submitted by kjournald2 during a
commit operation. This defaults to 3, which is
a slightly higher priority than the default I/O
priority.
Data Mode
=========
There are 3 different data modes:

6
block/Kconfig
Просмотреть файл

@ -36,6 +36,12 @@ config LBD
This option also enables support for single files larger than
2TB.
The ext4 filesystem requires that this feature be enabled in
order to support filesystems that have the huge_file feature
enabled. Otherwise, it will refuse to mount any filesystems
that use the huge_file feature, which is enabled by default
by mke2fs.ext4. The GFS2 filesystem also requires this feature.
If unsure, say N.
config BLK_DEV_IO_TRACE

15
fs/block_dev.c
Просмотреть файл

@ -1234,6 +1234,20 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
return blkdev_ioctl(bdev, mode, cmd, arg);
}
/*
* Try to release a page associated with block device when the system
* is under memory pressure.
*/
static int blkdev_releasepage(struct page *page, gfp_t wait)
{
struct super_block *super = BDEV_I(page->mapping->host)->bdev.bd_super;
if (super && super->s_op->bdev_try_to_free_page)
return super->s_op->bdev_try_to_free_page(super, page, wait);
return try_to_free_buffers(page);
}
static const struct address_space_operations def_blk_aops = {
.readpage = blkdev_readpage,
.writepage = blkdev_writepage,
@ -1241,6 +1255,7 @@ static const struct address_space_operations def_blk_aops = {
.write_begin = blkdev_write_begin,
.write_end = blkdev_write_end,
.writepages = generic_writepages,
.releasepage = blkdev_releasepage,
.direct_IO = blkdev_direct_IO,
};

81
fs/ext3/hash.c
Просмотреть файл

@ -35,23 +35,71 @@ static void TEA_transform(__u32 buf[4], __u32 const in[])
/* The old legacy hash */
static __u32 dx_hack_hash (const char *name, int len)
static __u32 dx_hack_hash_unsigned(const char *name, int len)
{
__u32 hash0 = 0x12a3fe2d, hash1 = 0x37abe8f9;
while (len--) {
__u32 hash = hash1 + (hash0 ^ (*name++ * 7152373));
__u32 hash, hash0 = 0x12a3fe2d, hash1 = 0x37abe8f9;
const unsigned char *ucp = (const unsigned char *) name;
if (hash & 0x80000000) hash -= 0x7fffffff;
while (len--) {
hash = hash1 + (hash0 ^ (((int) *ucp++) * 7152373));
if (hash & 0x80000000)
hash -= 0x7fffffff;
hash1 = hash0;
hash0 = hash;
}
return (hash0 << 1);
return hash0 << 1;
}
static void str2hashbuf(const char *msg, int len, __u32 *buf, int num)
static __u32 dx_hack_hash_signed(const char *name, int len)
{
__u32 hash, hash0 = 0x12a3fe2d, hash1 = 0x37abe8f9;
const signed char *scp = (const signed char *) name;
while (len--) {
hash = hash1 + (hash0 ^ (((int) *scp++) * 7152373));
if (hash & 0x80000000)
hash -= 0x7fffffff;
hash1 = hash0;
hash0 = hash;
}
return hash0 << 1;
}
static void str2hashbuf_signed(const char *msg, int len, __u32 *buf, int num)
{
__u32 pad, val;
int i;
const signed char *scp = (const signed char *) msg;
pad = (__u32)len | ((__u32)len << 8);
pad |= pad << 16;
val = pad;
if (len > num*4)
len = num * 4;
for (i = 0; i < len; i++) {
if ((i % 4) == 0)
val = pad;
val = ((int) scp[i]) + (val << 8);
if ((i % 4) == 3) {
*buf++ = val;
val = pad;
num--;
}
}
if (--num >= 0)
*buf++ = val;
while (--num >= 0)
*buf++ = pad;
}
static void str2hashbuf_unsigned(const char *msg, int len, __u32 *buf, int num)
{
__u32 pad, val;
int i;
const unsigned char *ucp = (const unsigned char *) msg;
pad = (__u32)len | ((__u32)len << 8);
pad |= pad << 16;
@ -62,7 +110,7 @@ static void str2hashbuf(const char *msg, int len, __u32 *buf, int num)
for (i=0; i < len; i++) {
if ((i % 4) == 0)
val = pad;
val = msg[i] + (val << 8);
val = ((int) ucp[i]) + (val << 8);
if ((i % 4) == 3) {
*buf++ = val;
val = pad;
@ -95,6 +143,8 @@ int ext3fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
const char *p;
int i;
__u32 in[8], buf[4];
void (*str2hashbuf)(const char *, int, __u32 *, int) =
str2hashbuf_signed;
/* Initialize the default seed for the hash checksum functions */
buf[0] = 0x67452301;
@ -113,13 +163,18 @@ int ext3fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
}
switch (hinfo->hash_version) {
case DX_HASH_LEGACY:
hash = dx_hack_hash(name, len);
case DX_HASH_LEGACY_UNSIGNED:
hash = dx_hack_hash_unsigned(name, len);
break;
case DX_HASH_LEGACY:
hash = dx_hack_hash_signed(name, len);
break;
case DX_HASH_HALF_MD4_UNSIGNED:
str2hashbuf = str2hashbuf_unsigned;
case DX_HASH_HALF_MD4:
p = name;
while (len > 0) {
str2hashbuf(p, len, in, 8);
(*str2hashbuf)(p, len, in, 8);
half_md4_transform(buf, in);
len -= 32;
p += 32;
@ -127,10 +182,12 @@ int ext3fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
minor_hash = buf[2];
hash = buf[1];
break;
case DX_HASH_TEA_UNSIGNED:
str2hashbuf = str2hashbuf_unsigned;
case DX_HASH_TEA:
p = name;
while (len > 0) {
str2hashbuf(p, len, in, 4);
(*str2hashbuf)(p, len, in, 4);
TEA_transform(buf, in);
len -= 16;
p += 16;

11
fs/ext3/namei.c
Просмотреть файл

@ -364,6 +364,8 @@ dx_probe(struct qstr *entry, struct inode *dir,
goto fail;
}
hinfo->hash_version = root->info.hash_version;
if (hinfo->hash_version <= DX_HASH_TEA)
hinfo->hash_version += EXT3_SB(dir->i_sb)->s_hash_unsigned;
hinfo->seed = EXT3_SB(dir->i_sb)->s_hash_seed;
if (entry)
ext3fs_dirhash(entry->name, entry->len, hinfo);
@ -632,6 +634,9 @@ int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
dir = dir_file->f_path.dentry->d_inode;
if (!(EXT3_I(dir)->i_flags & EXT3_INDEX_FL)) {
hinfo.hash_version = EXT3_SB(dir->i_sb)->s_def_hash_version;
if (hinfo.hash_version <= DX_HASH_TEA)
hinfo.hash_version +=
EXT3_SB(dir->i_sb)->s_hash_unsigned;
hinfo.seed = EXT3_SB(dir->i_sb)->s_hash_seed;
count = htree_dirblock_to_tree(dir_file, dir, 0, &hinfo,
start_hash, start_minor_hash);
@ -1152,9 +1157,9 @@ static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
u32 hash2;
struct dx_map_entry *map;
char *data1 = (*bh)->b_data, *data2;
unsigned split, move, size, i;
unsigned split, move, size;
struct ext3_dir_entry_2 *de = NULL, *de2;
int err = 0;
int err = 0, i;
bh2 = ext3_append (handle, dir, &newblock, &err);
if (!(bh2)) {
@ -1394,6 +1399,8 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
/* Initialize as for dx_probe */
hinfo.hash_version = root->info.hash_version;
if (hinfo.hash_version <= DX_HASH_TEA)
hinfo.hash_version += EXT3_SB(dir->i_sb)->s_hash_unsigned;
hinfo.seed = EXT3_SB(dir->i_sb)->s_hash_seed;
ext3fs_dirhash(name, namelen, &hinfo);
frame = frames;

33
fs/ext3/super.c
Просмотреть файл

@ -683,6 +683,26 @@ static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid,
ext3_nfs_get_inode);
}
/*
* Try to release metadata pages (indirect blocks, directories) which are
* mapped via the block device. Since these pages could have journal heads
* which would prevent try_to_free_buffers() from freeing them, we must use
* jbd layer's try_to_free_buffers() function to release them.
*/
static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
gfp_t wait)
{
journal_t *journal = EXT3_SB(sb)->s_journal;
WARN_ON(PageChecked(page));
if (!page_has_buffers(page))
return 0;
if (journal)
return journal_try_to_free_buffers(journal, page,
wait & ~__GFP_WAIT);
return try_to_free_buffers(page);
}
#ifdef CONFIG_QUOTA
#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
#define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
@ -749,6 +769,7 @@ static const struct super_operations ext3_sops = {
.quota_read = ext3_quota_read,
.quota_write = ext3_quota_write,
#endif
.bdev_try_to_free_page = bdev_try_to_free_page,
};
static const struct export_operations ext3_export_ops = {
@ -1750,6 +1771,18 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
for (i=0; i < 4; i++)
sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
sbi->s_def_hash_version = es->s_def_hash_version;
i = le32_to_cpu(es->s_flags);
if (i & EXT2_FLAGS_UNSIGNED_HASH)
sbi->s_hash_unsigned = 3;
else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) {
#ifdef __CHAR_UNSIGNED__
es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH);
sbi->s_hash_unsigned = 3;
#else
es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH);
#endif
sb->s_dirt = 1;
}
if (sbi->s_blocks_per_group > blocksize * 8) {
printk (KERN_ERR

293
fs/ext4/balloc.c
Просмотреть файл

@ -20,6 +20,7 @@
#include "ext4.h"
#include "ext4_jbd2.h"
#include "group.h"
#include "mballoc.h"
/*
* balloc.c contains the blocks allocation and deallocation routines
@ -100,10 +101,10 @@ unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh,
* essentially implementing a per-group read-only flag. */
if (!ext4_group_desc_csum_verify(sbi, block_group, gdp)) {
ext4_error(sb, __func__,
"Checksum bad for group %lu\n", block_group);
gdp->bg_free_blocks_count = 0;
gdp->bg_free_inodes_count = 0;
gdp->bg_itable_unused = 0;
"Checksum bad for group %u", block_group);
ext4_free_blks_set(sb, gdp, 0);
ext4_free_inodes_set(sb, gdp, 0);
ext4_itable_unused_set(sb, gdp, 0);
memset(bh->b_data, 0xff, sb->s_blocksize);
return 0;
}
@ -205,15 +206,15 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
ext4_group_t block_group,
struct buffer_head **bh)
{
unsigned long group_desc;
unsigned long offset;
unsigned int group_desc;
unsigned int offset;
struct ext4_group_desc *desc;
struct ext4_sb_info *sbi = EXT4_SB(sb);
if (block_group >= sbi->s_groups_count) {
ext4_error(sb, "ext4_get_group_desc",
"block_group >= groups_count - "
"block_group = %lu, groups_count = %lu",
"block_group = %u, groups_count = %u",
block_group, sbi->s_groups_count);
return NULL;
@ -225,7 +226,7 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
if (!sbi->s_group_desc[group_desc]) {
ext4_error(sb, "ext4_get_group_desc",
"Group descriptor not loaded - "
"block_group = %lu, group_desc = %lu, desc = %lu",
"block_group = %u, group_desc = %u, desc = %u",
block_group, group_desc, offset);
return NULL;
}
@ -315,29 +316,50 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
if (unlikely(!bh)) {
ext4_error(sb, __func__,
"Cannot read block bitmap - "
"block_group = %lu, block_bitmap = %llu",
"block_group = %u, block_bitmap = %llu",
block_group, bitmap_blk);
return NULL;
}
if (buffer_uptodate(bh) &&
!(desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)))
if (bitmap_uptodate(bh))
return bh;
lock_buffer(bh);
if (bitmap_uptodate(bh)) {
unlock_buffer(bh);
return bh;
}
spin_lock(sb_bgl_lock(EXT4_SB(sb), block_group));
if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
ext4_init_block_bitmap(sb, bh, block_group, desc);
set_bitmap_uptodate(bh);
set_buffer_uptodate(bh);
unlock_buffer(bh);
spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group));
unlock_buffer(bh);
return bh;
}
spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group));
if (buffer_uptodate(bh)) {
/*
* if not uninit if bh is uptodate,
* bitmap is also uptodate
*/
set_bitmap_uptodate(bh);
unlock_buffer(bh);
return bh;
}
/*
* submit the buffer_head for read. We can
* safely mark the bitmap as uptodate now.
* We do it here so the bitmap uptodate bit
* get set with buffer lock held.
*/
set_bitmap_uptodate(bh);
if (bh_submit_read(bh) < 0) {
put_bh(bh);
ext4_error(sb, __func__,
"Cannot read block bitmap - "
"block_group = %lu, block_bitmap = %llu",
"block_group = %u, block_bitmap = %llu",
block_group, bitmap_blk);
return NULL;
}
@ -350,62 +372,44 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
}
/**
* ext4_free_blocks_sb() -- Free given blocks and update quota
* ext4_add_groupblocks() -- Add given blocks to an existing group
* @handle: handle to this transaction
* @sb: super block
* @block: start physcial block to free
* @block: start physcial block to add to the block group
* @count: number of blocks to free
* @pdquot_freed_blocks: pointer to quota
*
* XXX This function is only used by the on-line resizing code, which
* should probably be fixed up to call the mballoc variant. There
* this needs to be cleaned up later; in fact, I'm not convinced this
* is 100% correct in the face of the mballoc code. The online resizing
* code needs to be fixed up to more tightly (and correctly) interlock
* with the mballoc code.
* This marks the blocks as free in the bitmap. We ask the
* mballoc to reload the buddy after this by setting group
* EXT4_GROUP_INFO_NEED_INIT_BIT flag
*/
void ext4_free_blocks_sb(handle_t *handle, struct super_block *sb,
ext4_fsblk_t block, unsigned long count,
unsigned long *pdquot_freed_blocks)
void ext4_add_groupblocks(handle_t *handle, struct super_block *sb,
ext4_fsblk_t block, unsigned long count)
{
struct buffer_head *bitmap_bh = NULL;
struct buffer_head *gd_bh;
ext4_group_t block_group;
ext4_grpblk_t bit;
unsigned long i;
unsigned long overflow;
unsigned int i;
struct ext4_group_desc *desc;
struct ext4_super_block *es;
struct ext4_sb_info *sbi;
int err = 0, ret;
ext4_grpblk_t group_freed;
int err = 0, ret, blk_free_count;
ext4_grpblk_t blocks_freed;
struct ext4_group_info *grp;
*pdquot_freed_blocks = 0;
sbi = EXT4_SB(sb);
es = sbi->s_es;
if (block < le32_to_cpu(es->s_first_data_block) ||
block + count < block ||
block + count > ext4_blocks_count(es)) {
ext4_error(sb, "ext4_free_blocks",
"Freeing blocks not in datazone - "
"block = %llu, count = %lu", block, count);
goto error_return;
}
ext4_debug("Adding block(s) %llu-%llu\n", block, block + count - 1);
ext4_debug("freeing block(s) %llu-%llu\n", block, block + count - 1);
do_more:
overflow = 0;
ext4_get_group_no_and_offset(sb, block, &block_group, &bit);
grp = ext4_get_group_info(sb, block_group);
/*
* Check to see if we are freeing blocks across a group
* boundary.
*/
if (bit + count > EXT4_BLOCKS_PER_GROUP(sb)) {
overflow = bit + count - EXT4_BLOCKS_PER_GROUP(sb);
count -= overflow;
goto error_return;
}
brelse(bitmap_bh);
bitmap_bh = ext4_read_block_bitmap(sb, block_group);
if (!bitmap_bh)
goto error_return;
@ -418,18 +422,17 @@ do_more:
in_range(block, ext4_inode_table(sb, desc), sbi->s_itb_per_group) ||
in_range(block + count - 1, ext4_inode_table(sb, desc),
sbi->s_itb_per_group)) {
ext4_error(sb, "ext4_free_blocks",
"Freeing blocks in system zones - "
ext4_error(sb, __func__,
"Adding blocks in system zones - "
"Block = %llu, count = %lu",
block, count);
goto error_return;
}
/*
* We are about to start releasing blocks in the bitmap,
* We are about to add blocks to the bitmap,
* so we need undo access.
*/
/* @@@ check errors */
BUFFER_TRACE(bitmap_bh, "getting undo access");
err = ext4_journal_get_undo_access(handle, bitmap_bh);
if (err)
@ -444,107 +447,55 @@ do_more:
err = ext4_journal_get_write_access(handle, gd_bh);
if (err)
goto error_return;
jbd_lock_bh_state(bitmap_bh);
for (i = 0, group_freed = 0; i < count; i++) {
/*
* An HJ special. This is expensive...
*/
#ifdef CONFIG_JBD2_DEBUG
jbd_unlock_bh_state(bitmap_bh);
{
struct buffer_head *debug_bh;
debug_bh = sb_find_get_block(sb, block + i);
if (debug_bh) {
BUFFER_TRACE(debug_bh, "Deleted!");
if (!bh2jh(bitmap_bh)->b_committed_data)
BUFFER_TRACE(debug_bh,
"No commited data in bitmap");
BUFFER_TRACE2(debug_bh, bitmap_bh, "bitmap");
__brelse(debug_bh);
}
}
jbd_lock_bh_state(bitmap_bh);
#endif
if (need_resched()) {
jbd_unlock_bh_state(bitmap_bh);
cond_resched();
jbd_lock_bh_state(bitmap_bh);
}
/* @@@ This prevents newly-allocated data from being
* freed and then reallocated within the same
* transaction.
*
* Ideally we would want to allow that to happen, but to
* do so requires making jbd2_journal_forget() capable of
* revoking the queued write of a data block, which
* implies blocking on the journal lock. *forget()
* cannot block due to truncate races.
*
* Eventually we can fix this by making jbd2_journal_forget()
* return a status indicating whether or not it was able
* to revoke the buffer. On successful revoke, it is
* safe not to set the allocation bit in the committed
* bitmap, because we know that there is no outstanding
* activity on the buffer any more and so it is safe to
* reallocate it.
*/
BUFFER_TRACE(bitmap_bh, "set in b_committed_data");
J_ASSERT_BH(bitmap_bh,
bh2jh(bitmap_bh)->b_committed_data != NULL);
ext4_set_bit_atomic(sb_bgl_lock(sbi, block_group), bit + i,
bh2jh(bitmap_bh)->b_committed_data);
/*
* We clear the bit in the bitmap after setting the committed
* data bit, because this is the reverse order to that which
* the allocator uses.
*/
/*
* make sure we don't allow a parallel init on other groups in the
* same buddy cache
*/
down_write(&grp->alloc_sem);
for (i = 0, blocks_freed = 0; i < count; i++) {
BUFFER_TRACE(bitmap_bh, "clear bit");
if (!ext4_clear_bit_atomic(sb_bgl_lock(sbi, block_group),
bit + i, bitmap_bh->b_data)) {
jbd_unlock_bh_state(bitmap_bh);
ext4_error(sb, __func__,
"bit already cleared for block %llu",
(ext4_fsblk_t)(block + i));
jbd_lock_bh_state(bitmap_bh);
BUFFER_TRACE(bitmap_bh, "bit already cleared");
} else {
group_freed++;
blocks_freed++;
}
}
jbd_unlock_bh_state(bitmap_bh);
spin_lock(sb_bgl_lock(sbi, block_group));
le16_add_cpu(&desc->bg_free_blocks_count, group_freed);
blk_free_count = blocks_freed + ext4_free_blks_count(sb, desc);
ext4_free_blks_set(sb, desc, blk_free_count);
desc->bg_checksum = ext4_group_desc_csum(sbi, block_group, desc);
spin_unlock(sb_bgl_lock(sbi, block_group));
percpu_counter_add(&sbi->s_freeblocks_counter, count);
percpu_counter_add(&sbi->s_freeblocks_counter, blocks_freed);
if (sbi->s_log_groups_per_flex) {
ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
spin_lock(sb_bgl_lock(sbi, flex_group));
sbi->s_flex_groups[flex_group].free_blocks += count;
sbi->s_flex_groups[flex_group].free_blocks += blocks_freed;
spin_unlock(sb_bgl_lock(sbi, flex_group));
}
/*
* request to reload the buddy with the
* new bitmap information
*/
set_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &(grp->bb_state));
ext4_mb_update_group_info(grp, blocks_freed);
up_write(&grp->alloc_sem);
/* We dirtied the bitmap block */
BUFFER_TRACE(bitmap_bh, "dirtied bitmap block");
err = ext4_journal_dirty_metadata(handle, bitmap_bh);
err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh);
/* And the group descriptor block */
BUFFER_TRACE(gd_bh, "dirtied group descriptor block");
ret = ext4_journal_dirty_metadata(handle, gd_bh);
if (!err) err = ret;
*pdquot_freed_blocks += group_freed;
if (overflow && !err) {
block += count;
count = overflow;
goto do_more;
}
ret = ext4_handle_dirty_metadata(handle, NULL, gd_bh);
if (!err)
err = ret;
sb->s_dirt = 1;
error_return:
brelse(bitmap_bh);
ext4_std_error(sb, err);
@ -614,7 +565,7 @@ int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks)
if (dirty_blocks < 0) {
printk(KERN_CRIT "Dirty block accounting "
"went wrong %lld\n",
dirty_blocks);
(long long)dirty_blocks);
}
}
/* Check whether we have space after
@ -666,101 +617,45 @@ int ext4_should_retry_alloc(struct super_block *sb, int *retries)
return jbd2_journal_force_commit_nested(EXT4_SB(sb)->s_journal);
}
#define EXT4_META_BLOCK 0x1
static ext4_fsblk_t do_blk_alloc(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock, ext4_fsblk_t goal,
unsigned long *count, int *errp, int flags)
{
struct ext4_allocation_request ar;
ext4_fsblk_t ret;
memset(&ar, 0, sizeof(ar));
/* Fill with neighbour allocated blocks */
ar.inode = inode;
ar.goal = goal;
ar.len = *count;
ar.logical = iblock;
if (S_ISREG(inode->i_mode) && !(flags & EXT4_META_BLOCK))
/* enable in-core preallocation for data block allocation */
ar.flags = EXT4_MB_HINT_DATA;
else
/* disable in-core preallocation for non-regular files */
ar.flags = 0;
ret = ext4_mb_new_blocks(handle, &ar, errp);
*count = ar.len;
return ret;
}
/*
* ext4_new_meta_blocks() -- allocate block for meta data (indexing) blocks
*
* @handle: handle to this transaction
* @inode: file inode
* @goal: given target block(filesystem wide)
* @count: total number of blocks need
* @count: pointer to total number of blocks needed
* @errp: error code
*
* Return 1st allocated block numberon success, *count stores total account
* Return 1st allocated block number on success, *count stores total account
* error stores in errp pointer
*/
ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t goal, unsigned long *count, int *errp)
{
struct ext4_allocation_request ar;
ext4_fsblk_t ret;
ret = do_blk_alloc(handle, inode, 0, goal,
count, errp, EXT4_META_BLOCK);
memset(&ar, 0, sizeof(ar));
/* Fill with neighbour allocated blocks */
ar.inode = inode;
ar.goal = goal;
ar.len = count ? *count : 1;
ret = ext4_mb_new_blocks(handle, &ar, errp);
if (count)
*count = ar.len;
/*
* Account for the allocated meta blocks
*/
if (!(*errp) && EXT4_I(inode)->i_delalloc_reserved_flag) {
spin_lock(&EXT4_I(inode)->i_block_reservation_lock);
EXT4_I(inode)->i_allocated_meta_blocks += *count;
EXT4_I(inode)->i_allocated_meta_blocks += ar.len;
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
}
return ret;
}
/*
* ext4_new_meta_block() -- allocate block for meta data (indexing) blocks
*
* @handle: handle to this transaction
* @inode: file inode
* @goal: given target block(filesystem wide)
* @errp: error code
*
* Return allocated block number on success
*/
ext4_fsblk_t ext4_new_meta_block(handle_t *handle, struct inode *inode,
ext4_fsblk_t goal, int *errp)
{
unsigned long count = 1;
return ext4_new_meta_blocks(handle, inode, goal, &count, errp);
}
/*
* ext4_new_blocks() -- allocate data blocks
*
* @handle: handle to this transaction
* @inode: file inode
* @goal: given target block(filesystem wide)
* @count: total number of blocks need
* @errp: error code
*
* Return 1st allocated block numberon success, *count stores total account
* error stores in errp pointer
*/
ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock, ext4_fsblk_t goal,
unsigned long *count, int *errp)
{
return do_blk_alloc(handle, inode, iblock, goal, count, errp, 0);
}
/**
* ext4_count_free_blocks() -- count filesystem free blocks
* @sb: superblock
@ -776,7 +671,7 @@ ext4_fsblk_t ext4_count_free_blocks(struct super_block *sb)
#ifdef EXT4FS_DEBUG
struct ext4_super_block *es;
ext4_fsblk_t bitmap_count;
unsigned long x;
unsigned int x;
struct buffer_head *bitmap_bh = NULL;
es = EXT4_SB(sb)->s_es;
@ -796,7 +691,7 @@ ext4_fsblk_t ext4_count_free_blocks(struct super_block *sb)
continue;
x = ext4_count_free(bitmap_bh, sb->s_blocksize);
printk(KERN_DEBUG "group %lu: stored = %d, counted = %lu\n",
printk(KERN_DEBUG "group %lu: stored = %d, counted = %u\n",
i, le16_to_cpu(gdp->bg_free_blocks_count), x);
bitmap_count += x;
}
@ -812,7 +707,7 @@ ext4_fsblk_t ext4_count_free_blocks(struct super_block *sb)
gdp = ext4_get_group_desc(sb, i, NULL);
if (!gdp)
continue;
desc_count += le16_to_cpu(gdp->bg_free_blocks_count);
desc_count += ext4_free_blks_count(sb, gdp);
}
return desc_count;

5
fs/ext4/bitmap.c
Просмотреть файл

@ -15,10 +15,9 @@
static const int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
unsigned long ext4_count_free(struct buffer_head *map, unsigned int numchars)
unsigned int ext4_count_free(struct buffer_head *map, unsigned int numchars)
{
unsigned int i;
unsigned long sum = 0;
unsigned int i, sum = 0;
if (!map)
return 0;

10
fs/ext4/dir.c
Просмотреть файл

@ -64,7 +64,7 @@ static unsigned char get_dtype(struct super_block *sb, int filetype)
int ext4_check_dir_entry(const char *function, struct inode *dir,
struct ext4_dir_entry_2 *de,
struct buffer_head *bh,
unsigned long offset)
unsigned int offset)
{
const char *error_msg = NULL;
const int rlen = ext4_rec_len_from_disk(de->rec_len);
@ -84,9 +84,9 @@ int ext4_check_dir_entry(const char *function, struct inode *dir,
if (error_msg != NULL)
ext4_error(dir->i_sb, function,
"bad entry in directory #%lu: %s - "
"offset=%lu, inode=%lu, rec_len=%d, name_len=%d",
"offset=%u, inode=%u, rec_len=%d, name_len=%d",
dir->i_ino, error_msg, offset,
(unsigned long) le32_to_cpu(de->inode),
le32_to_cpu(de->inode),
rlen, de->name_len);
return error_msg == NULL ? 1 : 0;
}
@ -95,7 +95,7 @@ static int ext4_readdir(struct file *filp,
void *dirent, filldir_t filldir)
{
int error = 0;
unsigned long offset;
unsigned int offset;
int i, stored;
struct ext4_dir_entry_2 *de;
struct super_block *sb;
@ -405,7 +405,7 @@ static int call_filldir(struct file *filp, void *dirent,
sb = inode->i_sb;
if (!fname) {
printk(KERN_ERR "ext4: call_filldir: called with "
printk(KERN_ERR "EXT4-fs: call_filldir: called with "
"null fname?!?\n");
return 0;
}

152
fs/ext4/ext4.h
Просмотреть файл

@ -19,6 +19,7 @@
#include <linux/types.h>
#include <linux/blkdev.h>
#include <linux/magic.h>
#include <linux/jbd2.h>
#include "ext4_i.h"
/*
@ -94,9 +95,9 @@ struct ext4_allocation_request {
/* phys. block for ^^^ */
ext4_fsblk_t pright;
/* how many blocks we want to allocate */
unsigned long len;
unsigned int len;
/* flags. see above EXT4_MB_HINT_* */
unsigned long flags;
unsigned int flags;
};
/*
@ -156,12 +157,12 @@ struct ext4_group_desc
__le32 bg_block_bitmap_lo; /* Blocks bitmap block */
__le32 bg_inode_bitmap_lo; /* Inodes bitmap block */
__le32 bg_inode_table_lo; /* Inodes table block */
__le16 bg_free_blocks_count; /* Free blocks count */
__le16 bg_free_inodes_count; /* Free inodes count */
__le16 bg_used_dirs_count; /* Directories count */
__le16 bg_free_blocks_count_lo;/* Free blocks count */
__le16 bg_free_inodes_count_lo;/* Free inodes count */
__le16 bg_used_dirs_count_lo; /* Directories count */
__le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */
__u32 bg_reserved[2]; /* Likely block/inode bitmap checksum */
__le16 bg_itable_unused; /* Unused inodes count */
__le16 bg_itable_unused_lo; /* Unused inodes count */
__le16 bg_checksum; /* crc16(sb_uuid+group+desc) */
__le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */
__le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */
@ -169,7 +170,7 @@ struct ext4_group_desc
__le16 bg_free_blocks_count_hi;/* Free blocks count MSB */
__le16 bg_free_inodes_count_hi;/* Free inodes count MSB */
__le16 bg_used_dirs_count_hi; /* Directories count MSB */
__le16 bg_itable_unused_hi; /* Unused inodes count MSB */
__le16 bg_itable_unused_hi; /* Unused inodes count MSB */
__u32 bg_reserved2[3];
};
@ -328,6 +329,7 @@ struct ext4_mount_options {
uid_t s_resuid;
gid_t s_resgid;
unsigned long s_commit_interval;
u32 s_min_batch_time, s_max_batch_time;
#ifdef CONFIG_QUOTA
int s_jquota_fmt;
char *s_qf_names[MAXQUOTAS];
@ -534,7 +536,6 @@ do { \
#define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */
#define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */
#define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
#define EXT4_MOUNT_EXTENTS 0x400000 /* Extents support */
#define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */
#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */
#define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */
@ -726,11 +727,11 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
*/
#define EXT4_HAS_COMPAT_FEATURE(sb,mask) \
(EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask))
((EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask)) != 0)
#define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \
(EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask))
((EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask)) != 0)
#define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \
(EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask))
((EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask)) != 0)
#define EXT4_SET_COMPAT_FEATURE(sb,mask) \
EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
#define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \
@ -805,6 +806,12 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
#define EXT4_DEFM_JMODE_ORDERED 0x0040
#define EXT4_DEFM_JMODE_WBACK 0x0060
/*
* Default journal batch times
*/
#define EXT4_DEF_MIN_BATCH_TIME 0
#define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */
/*
* Structure of a directory entry
*/
@ -891,6 +898,9 @@ static inline __le16 ext4_rec_len_to_disk(unsigned len)
#define DX_HASH_LEGACY 0
#define DX_HASH_HALF_MD4 1
#define DX_HASH_TEA 2
#define DX_HASH_LEGACY_UNSIGNED 3
#define DX_HASH_HALF_MD4_UNSIGNED 4
#define DX_HASH_TEA_UNSIGNED 5
#ifdef __KERNEL__
@ -955,7 +965,7 @@ ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no)
#define ERR_BAD_DX_DIR -75000
void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr,
unsigned long *blockgrpp, ext4_grpblk_t *offsetp);
ext4_group_t *blockgrpp, ext4_grpblk_t *offsetp);
extern struct proc_dir_entry *ext4_proc_root;
@ -987,6 +997,9 @@ do { \
# define ATTRIB_NORET __attribute__((noreturn))
# define NORET_AND noreturn,
/* bitmap.c */
extern unsigned int ext4_count_free(struct buffer_head *, unsigned);
/* balloc.c */
extern unsigned int ext4_block_group(struct super_block *sb,
ext4_fsblk_t blocknr);
@ -995,20 +1008,14 @@ extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb,
extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
ext4_group_t group);
extern ext4_fsblk_t ext4_new_meta_block(handle_t *handle, struct inode *inode,
ext4_fsblk_t goal, int *errp);
extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t goal, unsigned long *count, int *errp);
extern ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock, ext4_fsblk_t goal,
unsigned long *count, int *errp);
extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi, s64 nblocks);
extern int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks);
extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t block, unsigned long count, int metadata);
extern void ext4_free_blocks_sb(handle_t *handle, struct super_block *sb,
ext4_fsblk_t block, unsigned long count,
unsigned long *pdquot_freed_blocks);
extern void ext4_add_groupblocks(handle_t *handle, struct super_block *sb,
ext4_fsblk_t block, unsigned long count);
extern ext4_fsblk_t ext4_count_free_blocks(struct super_block *);
extern void ext4_check_blocks_bitmap(struct super_block *);
extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
@ -1019,7 +1026,7 @@ extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
/* dir.c */
extern int ext4_check_dir_entry(const char *, struct inode *,
struct ext4_dir_entry_2 *,
struct buffer_head *, unsigned long);
struct buffer_head *, unsigned int);
extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
__u32 minor_hash,
struct ext4_dir_entry_2 *dirent);
@ -1039,7 +1046,6 @@ extern struct inode * ext4_orphan_get(struct super_block *, unsigned long);
extern unsigned long ext4_count_free_inodes(struct super_block *);
extern unsigned long ext4_count_dirs(struct super_block *);
extern void ext4_check_inodes_bitmap(struct super_block *);
extern unsigned long ext4_count_free(struct buffer_head *, unsigned);
/* mballoc.c */
extern long ext4_mb_stats;
@ -1054,12 +1060,13 @@ extern int __init init_ext4_mballoc(void);
extern void exit_ext4_mballoc(void);
extern void ext4_mb_free_blocks(handle_t *, struct inode *,
unsigned long, unsigned long, int, unsigned long *);
extern int ext4_mb_add_more_groupinfo(struct super_block *sb,
extern int ext4_mb_add_groupinfo(struct super_block *sb,
ext4_group_t i, struct ext4_group_desc *desc);
extern void ext4_mb_update_group_info(struct ext4_group_info *grp,
ext4_grpblk_t add);
extern int ext4_mb_get_buddy_cache_lock(struct super_block *, ext4_group_t);
extern void ext4_mb_put_buddy_cache_lock(struct super_block *,
ext4_group_t, int);
/* inode.c */
int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode,
struct buffer_head *bh, ext4_fsblk_t blocknr);
@ -1069,10 +1076,6 @@ struct buffer_head *ext4_bread(handle_t *, struct inode *,
ext4_lblk_t, int, int *);
int ext4_get_block(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create);
int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock, unsigned long maxblocks,
struct buffer_head *bh_result,
int create, int extend_disksize);
extern struct inode *ext4_iget(struct super_block *, unsigned long);
extern int ext4_write_inode(struct inode *, int);
@ -1123,6 +1126,9 @@ extern void ext4_abort(struct super_block *, const char *, const char *, ...)
__attribute__ ((format (printf, 3, 4)));
extern void ext4_warning(struct super_block *, const char *, const char *, ...)
__attribute__ ((format (printf, 3, 4)));
extern void ext4_grp_locked_error(struct super_block *, ext4_group_t,
const char *, const char *, ...)
__attribute__ ((format (printf, 4, 5)));
extern void ext4_update_dynamic_rev(struct super_block *sb);
extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb,
__u32 compat);
@ -1136,12 +1142,28 @@ extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
struct ext4_group_desc *bg);
extern ext4_fsblk_t ext4_inode_table(struct super_block *sb,
struct ext4_group_desc *bg);
extern __u32 ext4_free_blks_count(struct super_block *sb,
struct ext4_group_desc *bg);
extern __u32 ext4_free_inodes_count(struct super_block *sb,
struct ext4_group_desc *bg);
extern __u32 ext4_used_dirs_count(struct super_block *sb,
struct ext4_group_desc *bg);
extern __u32 ext4_itable_unused_count(struct super_block *sb,
struct ext4_group_desc *bg);
extern void ext4_block_bitmap_set(struct super_block *sb,
struct ext4_group_desc *bg, ext4_fsblk_t blk);
extern void ext4_inode_bitmap_set(struct super_block *sb,
struct ext4_group_desc *bg, ext4_fsblk_t blk);
extern void ext4_inode_table_set(struct super_block *sb,
struct ext4_group_desc *bg, ext4_fsblk_t blk);
extern void ext4_free_blks_set(struct super_block *sb,
struct ext4_group_desc *bg, __u32 count);
extern void ext4_free_inodes_set(struct super_block *sb,
struct ext4_group_desc *bg, __u32 count);
extern void ext4_used_dirs_set(struct super_block *sb,
struct ext4_group_desc *bg, __u32 count);
extern void ext4_itable_unused_set(struct super_block *sb,
struct ext4_group_desc *bg, __u32 count);
static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
{
@ -1246,6 +1268,50 @@ static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize)
return ;
}
struct ext4_group_info {
unsigned long bb_state;
struct rb_root bb_free_root;
unsigned short bb_first_free;
unsigned short bb_free;
unsigned short bb_fragments;
struct list_head bb_prealloc_list;
#ifdef DOUBLE_CHECK
void *bb_bitmap;
#endif
struct rw_semaphore alloc_sem;
unsigned short bb_counters[];
};
#define EXT4_GROUP_INFO_NEED_INIT_BIT 0
#define EXT4_GROUP_INFO_LOCKED_BIT 1
#define EXT4_MB_GRP_NEED_INIT(grp) \
(test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state)))
static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group)
{
struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
bit_spin_lock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state));
}
static inline void ext4_unlock_group(struct super_block *sb,
ext4_group_t group)
{
struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
bit_spin_unlock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state));
}
static inline int ext4_is_group_locked(struct super_block *sb,
ext4_group_t group)
{
struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
return bit_spin_is_locked(EXT4_GROUP_INFO_LOCKED_BIT,
&(grinfo->bb_state));
}
/*
* Inodes and files operations
*/
@ -1271,18 +1337,38 @@ extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks,
int chunk);
extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock,
unsigned long max_blocks, struct buffer_head *bh_result,
int create, int extend_disksize);
ext4_lblk_t iblock, unsigned int max_blocks,
struct buffer_head *bh_result,
int create, int extend_disksize);
extern void ext4_ext_truncate(struct inode *);
extern void ext4_ext_init(struct super_block *);
extern void ext4_ext_release(struct super_block *);
extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset,
loff_t len);
extern int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode,
sector_t block, unsigned long max_blocks,
sector_t block, unsigned int max_blocks,
struct buffer_head *bh, int create,
int extend_disksize, int flag);
extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len);
/*
* Add new method to test wether block and inode bitmaps are properly
* initialized. With uninit_bg reading the block from disk is not enough
* to mark the bitmap uptodate. We need to also zero-out the bitmap
*/
#define BH_BITMAP_UPTODATE BH_JBDPrivateStart
static inline int bitmap_uptodate(struct buffer_head *bh)
{
return (buffer_uptodate(bh) &&
test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state));
}
static inline void set_bitmap_uptodate(struct buffer_head *bh)
{
set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state);
}
#endif /* __KERNEL__ */
#endif /* _EXT4_H */

5
fs/ext4/ext4_extents.h
Просмотреть файл

@ -194,11 +194,6 @@ static inline unsigned short ext_depth(struct inode *inode)
return le16_to_cpu(ext_inode_hdr(inode)->eh_depth);
}
static inline void ext4_ext_tree_changed(struct inode *inode)
{
EXT4_I(inode)->i_ext_generation++;
}
static inline void
ext4_ext_invalidate_cache(struct inode *inode)
{

16
fs/ext4/ext4_i.h
Просмотреть файл

@ -31,7 +31,7 @@ typedef unsigned long long ext4_fsblk_t;
typedef __u32 ext4_lblk_t;
/* data type for block group number */
typedef unsigned long ext4_group_t;
typedef unsigned int ext4_group_t;
#define rsv_start rsv_window._rsv_start
#define rsv_end rsv_window._rsv_end
@ -100,9 +100,6 @@ struct ext4_inode_info {
*/
loff_t i_disksize;
/* on-disk additional length */
__u16 i_extra_isize;
/*
* i_data_sem is for serialising ext4_truncate() against
* ext4_getblock(). In the 2.4 ext2 design, great chunks of inode's
@ -117,7 +114,6 @@ struct ext4_inode_info {
struct inode vfs_inode;
struct jbd2_inode jinode;
unsigned long i_ext_generation;
struct ext4_ext_cache i_cached_extent;
/*
* File creation time. Its function is same as that of
@ -130,10 +126,14 @@ struct ext4_inode_info {
spinlock_t i_prealloc_lock;
/* allocation reservation info for delalloc */
unsigned long i_reserved_data_blocks;
unsigned long i_reserved_meta_blocks;
unsigned long i_allocated_meta_blocks;
unsigned int i_reserved_data_blocks;
unsigned int i_reserved_meta_blocks;
unsigned int i_allocated_meta_blocks;
unsigned short i_delalloc_reserved_flag;
/* on-disk additional length */
__u16 i_extra_isize;
spinlock_t i_block_reservation_lock;
};

83
fs/ext4/ext4_jbd2.c
Просмотреть файл

@ -7,53 +7,96 @@
int __ext4_journal_get_undo_access(const char *where, handle_t *handle,
struct buffer_head *bh)
{
int err = jbd2_journal_get_undo_access(handle, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh, handle, err);
int err = 0;
if (ext4_handle_valid(handle)) {
err = jbd2_journal_get_undo_access(handle, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh,
handle, err);
}
return err;
}
int __ext4_journal_get_write_access(const char *where, handle_t *handle,
struct buffer_head *bh)
{
int err = jbd2_journal_get_write_access(handle, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh, handle, err);
int err = 0;
if (ext4_handle_valid(handle)) {
err = jbd2_journal_get_write_access(handle, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh,
handle, err);
}
return err;
}
int __ext4_journal_forget(const char *where, handle_t *handle,
struct buffer_head *bh)
{
int err = jbd2_journal_forget(handle, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh, handle, err);
int err = 0;
if (ext4_handle_valid(handle)) {
err = jbd2_journal_forget(handle, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh,
handle, err);
}
return err;
}
int __ext4_journal_revoke(const char *where, handle_t *handle,
ext4_fsblk_t blocknr, struct buffer_head *bh)
{
int err = jbd2_journal_revoke(handle, blocknr, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh, handle, err);
int err = 0;
if (ext4_handle_valid(handle)) {
err = jbd2_journal_revoke(handle, blocknr, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh,
handle, err);
}
return err;
}
int __ext4_journal_get_create_access(const char *where,
handle_t *handle, struct buffer_head *bh)
{
int err = jbd2_journal_get_create_access(handle, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh, handle, err);
int err = 0;
if (ext4_handle_valid(handle)) {
err = jbd2_journal_get_create_access(handle, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh,
handle, err);
}
return err;
}
int __ext4_journal_dirty_metadata(const char *where,
handle_t *handle, struct buffer_head *bh)
int __ext4_handle_dirty_metadata(const char *where, handle_t *handle,
struct inode *inode, struct buffer_head *bh)
{
int err = jbd2_journal_dirty_metadata(handle, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh, handle, err);
int err = 0;
if (ext4_handle_valid(handle)) {
err = jbd2_journal_dirty_metadata(handle, bh);
if (err)
ext4_journal_abort_handle(where, __func__, bh,
handle, err);
} else {
mark_buffer_dirty(bh);
if (inode && inode_needs_sync(inode)) {
sync_dirty_buffer(bh);
if (buffer_req(bh) && !buffer_uptodate(bh)) {
ext4_error(inode->i_sb, __func__,
"IO error syncing inode, "
"inode=%lu, block=%llu",
inode->i_ino,
(unsigned long long) bh->b_blocknr);
err = -EIO;
}
}
}
return err;
}

87
fs/ext4/ext4_jbd2.h
Просмотреть файл

@ -32,8 +32,8 @@
* 5 levels of tree + root which are stored in the inode. */
#define EXT4_SINGLEDATA_TRANS_BLOCKS(sb) \
(EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS) \
|| test_opt(sb, EXTENTS) ? 27U : 8U)
(EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS) \
? 27U : 8U)
/* Extended attribute operations touch at most two data buffers,
* two bitmap buffers, and two group summaries, in addition to the inode
@ -122,12 +122,6 @@ int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode);
* been done yet.
*/
static inline void ext4_journal_release_buffer(handle_t *handle,
struct buffer_head *bh)
{
jbd2_journal_release_buffer(handle, bh);
}
void ext4_journal_abort_handle(const char *caller, const char *err_fn,
struct buffer_head *bh, handle_t *handle, int err);
@ -146,8 +140,8 @@ int __ext4_journal_revoke(const char *where, handle_t *handle,
int __ext4_journal_get_create_access(const char *where,
handle_t *handle, struct buffer_head *bh);
int __ext4_journal_dirty_metadata(const char *where,
handle_t *handle, struct buffer_head *bh);
int __ext4_handle_dirty_metadata(const char *where, handle_t *handle,
struct inode *inode, struct buffer_head *bh);
#define ext4_journal_get_undo_access(handle, bh) \
__ext4_journal_get_undo_access(__func__, (handle), (bh))
@ -157,14 +151,57 @@ int __ext4_journal_dirty_metadata(const char *where,
__ext4_journal_revoke(__func__, (handle), (blocknr), (bh))
#define ext4_journal_get_create_access(handle, bh) \
__ext4_journal_get_create_access(__func__, (handle), (bh))
#define ext4_journal_dirty_metadata(handle, bh) \
__ext4_journal_dirty_metadata(__func__, (handle), (bh))
#define ext4_journal_forget(handle, bh) \
__ext4_journal_forget(__func__, (handle), (bh))
#define ext4_handle_dirty_metadata(handle, inode, bh) \
__ext4_handle_dirty_metadata(__func__, (handle), (inode), (bh))
handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks);
int __ext4_journal_stop(const char *where, handle_t *handle);
#define EXT4_NOJOURNAL_HANDLE ((handle_t *) 0x1)
static inline int ext4_handle_valid(handle_t *handle)
{
if (handle == EXT4_NOJOURNAL_HANDLE)
return 0;
return 1;
}
static inline void ext4_handle_sync(handle_t *handle)
{
if (ext4_handle_valid(handle))
handle->h_sync = 1;
}
static inline void ext4_handle_release_buffer(handle_t *handle,
struct buffer_head *bh)
{
if (ext4_handle_valid(handle))
jbd2_journal_release_buffer(handle, bh);
}
static inline int ext4_handle_is_aborted(handle_t *handle)
{
if (ext4_handle_valid(handle))
return is_handle_aborted(handle);
return 0;
}
static inline int ext4_handle_has_enough_credits(handle_t *handle, int needed)
{
if (ext4_handle_valid(handle) && handle->h_buffer_credits < needed)
return 0;
return 1;
}
static inline void ext4_journal_release_buffer(handle_t *handle,
struct buffer_head *bh)
{
if (ext4_handle_valid(handle))
jbd2_journal_release_buffer(handle, bh);
}
static inline handle_t *ext4_journal_start(struct inode *inode, int nblocks)
{
return ext4_journal_start_sb(inode->i_sb, nblocks);
@ -180,27 +217,37 @@ static inline handle_t *ext4_journal_current_handle(void)
static inline int ext4_journal_extend(handle_t *handle, int nblocks)
{
return jbd2_journal_extend(handle, nblocks);
if (ext4_handle_valid(handle))
return jbd2_journal_extend(handle, nblocks);
return 0;
}
static inline int ext4_journal_restart(handle_t *handle, int nblocks)
{
return jbd2_journal_restart(handle, nblocks);
if (ext4_handle_valid(handle))
return jbd2_journal_restart(handle, nblocks);
return 0;
}
static inline int ext4_journal_blocks_per_page(struct inode *inode)
{
return jbd2_journal_blocks_per_page(inode);
if (EXT4_JOURNAL(inode) != NULL)
return jbd2_journal_blocks_per_page(inode);
return 0;
}
static inline int ext4_journal_force_commit(journal_t *journal)
{
return jbd2_journal_force_commit(journal);
if (journal)
return jbd2_journal_force_commit(journal);
return 0;
}
static inline int ext4_jbd2_file_inode(handle_t *handle, struct inode *inode)
{
return jbd2_journal_file_inode(handle, &EXT4_I(inode)->jinode);
if (ext4_handle_valid(handle))
return jbd2_journal_file_inode(handle, &EXT4_I(inode)->jinode);
return 0;
}
/* super.c */
@ -208,6 +255,8 @@ int ext4_force_commit(struct super_block *sb);
static inline int ext4_should_journal_data(struct inode *inode)
{
if (EXT4_JOURNAL(inode) == NULL)
return 0;
if (!S_ISREG(inode->i_mode))
return 1;
if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
@ -219,6 +268,8 @@ static inline int ext4_should_journal_data(struct inode *inode)
static inline int ext4_should_order_data(struct inode *inode)
{
if (EXT4_JOURNAL(inode) == NULL)
return 0;
if (!S_ISREG(inode->i_mode))
return 0;
if (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL)
@ -230,6 +281,8 @@ static inline int ext4_should_order_data(struct inode *inode)
static inline int ext4_should_writeback_data(struct inode *inode)
{
if (EXT4_JOURNAL(inode) == NULL)
return 0;
if (!S_ISREG(inode->i_mode))
return 0;
if (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL)

6
fs/ext4/ext4_sb.h
Просмотреть файл

@ -57,6 +57,7 @@ struct ext4_sb_info {
u32 s_next_generation;
u32 s_hash_seed[4];
int s_def_hash_version;
int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */
struct percpu_counter s_freeblocks_counter;
struct percpu_counter s_freeinodes_counter;
struct percpu_counter s_dirs_counter;
@ -73,6 +74,8 @@ struct ext4_sb_info {
struct journal_s *s_journal;
struct list_head s_orphan;
unsigned long s_commit_interval;
u32 s_max_batch_time;
u32 s_min_batch_time;
struct block_device *journal_bdev;
#ifdef CONFIG_JBD2_DEBUG
struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */
@ -101,7 +104,8 @@ struct ext4_sb_info {
spinlock_t s_reserve_lock;
spinlock_t s_md_lock;
tid_t s_last_transaction;
unsigned short *s_mb_offsets, *s_mb_maxs;
unsigned short *s_mb_offsets;
unsigned int *s_mb_maxs;
/* tunables */
unsigned long s_stripe;

60
fs/ext4/extents.c
Просмотреть файл

@ -97,6 +97,8 @@ static int ext4_ext_journal_restart(handle_t *handle, int needed)
{
int err;
if (!ext4_handle_valid(handle))
return 0;
if (handle->h_buffer_credits > needed)
return 0;
err = ext4_journal_extend(handle, needed);
@ -134,7 +136,7 @@ static int ext4_ext_dirty(handle_t *handle, struct inode *inode,
int err;
if (path->p_bh) {
/* path points to block */
err = ext4_journal_dirty_metadata(handle, path->p_bh);
err = ext4_handle_dirty_metadata(handle, inode, path->p_bh);
} else {
/* path points to leaf/index in inode body */
err = ext4_mark_inode_dirty(handle, inode);
@ -191,7 +193,7 @@ ext4_ext_new_meta_block(handle_t *handle, struct inode *inode,
ext4_fsblk_t goal, newblock;
goal = ext4_ext_find_goal(inode, path, le32_to_cpu(ex->ee_block));
newblock = ext4_new_meta_block(handle, inode, goal, err);
newblock = ext4_new_meta_blocks(handle, inode, goal, NULL, err);
return newblock;
}
@ -780,7 +782,7 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
set_buffer_uptodate(bh);
unlock_buffer(bh);
err = ext4_journal_dirty_metadata(handle, bh);
err = ext4_handle_dirty_metadata(handle, inode, bh);
if (err)
goto cleanup;
brelse(bh);
@ -859,7 +861,7 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
set_buffer_uptodate(bh);
unlock_buffer(bh);
err = ext4_journal_dirty_metadata(handle, bh);
err = ext4_handle_dirty_metadata(handle, inode, bh);
if (err)
goto cleanup;
brelse(bh);
@ -955,7 +957,7 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode,
set_buffer_uptodate(bh);
unlock_buffer(bh);
err = ext4_journal_dirty_metadata(handle, bh);
err = ext4_handle_dirty_metadata(handle, inode, bh);
if (err)
goto out;
@ -1160,15 +1162,13 @@ ext4_ext_search_right(struct inode *inode, struct ext4_ext_path *path,
while (--depth >= 0) {
ix = path[depth].p_idx;
if (ix != EXT_LAST_INDEX(path[depth].p_hdr))
break;
goto got_index;
}
if (depth < 0) {
/* we've gone up to the root and
* found no index to the right */
return 0;
}
/* we've gone up to the root and found no index to the right */
return 0;
got_index:
/* we've found index to the right, let's
* follow it and find the closest allocated
* block to the right */
@ -1201,7 +1201,6 @@ ext4_ext_search_right(struct inode *inode, struct ext4_ext_path *path,
*phys = ext_pblock(ex);
put_bh(bh);
return 0;
}
/*
@ -1622,7 +1621,6 @@ cleanup:
ext4_ext_drop_refs(npath);
kfree(npath);
}
ext4_ext_tree_changed(inode);
ext4_ext_invalidate_cache(inode);
return err;
}
@ -2233,7 +2231,6 @@ static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start)
}
}
out:
ext4_ext_tree_changed(inode);
ext4_ext_drop_refs(path);
kfree(path);
ext4_journal_stop(handle);
@ -2250,7 +2247,7 @@ void ext4_ext_init(struct super_block *sb)
* possible initialization would be here
*/
if (test_opt(sb, EXTENTS)) {
if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) {
printk(KERN_INFO "EXT4-fs: file extents enabled");
#ifdef AGGRESSIVE_TEST
printk(", aggressive tests");
@ -2275,7 +2272,7 @@ void ext4_ext_init(struct super_block *sb)
*/
void ext4_ext_release(struct super_block *sb)
{
if (!test_opt(sb, EXTENTS))
if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS))
return;
#ifdef EXTENTS_STATS
@ -2380,7 +2377,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
struct inode *inode,
struct ext4_ext_path *path,
ext4_lblk_t iblock,
unsigned long max_blocks)
unsigned int max_blocks)
{
struct ext4_extent *ex, newex, orig_ex;
struct ext4_extent *ex1 = NULL;
@ -2678,26 +2675,26 @@ fix_extent_len:
*/
int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock,
unsigned long max_blocks, struct buffer_head *bh_result,
unsigned int max_blocks, struct buffer_head *bh_result,
int create, int extend_disksize)
{
struct ext4_ext_path *path = NULL;
struct ext4_extent_header *eh;
struct ext4_extent newex, *ex;
ext4_fsblk_t goal, newblock;
int err = 0, depth, ret;
unsigned long allocated = 0;
ext4_fsblk_t newblock;
int err = 0, depth, ret, cache_type;
unsigned int allocated = 0;
struct ext4_allocation_request ar;
loff_t disksize;
__clear_bit(BH_New, &bh_result->b_state);
ext_debug("blocks %u/%lu requested for inode %u\n",
ext_debug("blocks %u/%u requested for inode %u\n",
iblock, max_blocks, inode->i_ino);
/* check in cache */
goal = ext4_ext_in_cache(inode, iblock, &newex);
if (goal) {
if (goal == EXT4_EXT_CACHE_GAP) {
cache_type = ext4_ext_in_cache(inode, iblock, &newex);
if (cache_type) {
if (cache_type == EXT4_EXT_CACHE_GAP) {
if (!create) {
/*
* block isn't allocated yet and
@ -2706,7 +2703,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
goto out2;
}
/* we should allocate requested block */
} else if (goal == EXT4_EXT_CACHE_EXTENT) {
} else if (cache_type == EXT4_EXT_CACHE_EXTENT) {
/* block is already allocated */
newblock = iblock
- le32_to_cpu(newex.ee_block)
@ -2854,7 +2851,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
if (!newblock)
goto out2;
ext_debug("allocate new block: goal %llu, found %llu/%lu\n",
goal, newblock, allocated);
ar.goal, newblock, allocated);
/* try to insert new extent into found leaf and return */
ext4_ext_store_pblock(&newex, newblock);
@ -2950,7 +2947,7 @@ void ext4_ext_truncate(struct inode *inode)
* transaction synchronous.
*/
if (IS_SYNC(inode))
handle->h_sync = 1;
ext4_handle_sync(handle);
out_stop:
up_write(&EXT4_I(inode)->i_data_sem);
@ -3004,7 +3001,7 @@ long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len)
handle_t *handle;
ext4_lblk_t block;
loff_t new_size;
unsigned long max_blocks;
unsigned int max_blocks;
int ret = 0;
int ret2 = 0;
int retries = 0;
@ -3083,7 +3080,7 @@ retry:
/*
* Callback function called for each extent to gather FIEMAP information.
*/
int ext4_ext_fiemap_cb(struct inode *inode, struct ext4_ext_path *path,
static int ext4_ext_fiemap_cb(struct inode *inode, struct ext4_ext_path *path,
struct ext4_ext_cache *newex, struct ext4_extent *ex,
void *data)
{
@ -3152,7 +3149,8 @@ int ext4_ext_fiemap_cb(struct inode *inode, struct ext4_ext_path *path,
/* fiemap flags we can handle specified here */
#define EXT4_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
int ext4_xattr_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo)
static int ext4_xattr_fiemap(struct inode *inode,
struct fiemap_extent_info *fieinfo)
{
__u64 physical = 0;
__u64 length;

3
fs/ext4/file.c
Просмотреть файл

@ -140,9 +140,6 @@ static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
return 0;
}
extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len);
const struct file_operations ext4_file_operations = {
.llseek = generic_file_llseek,
.read = do_sync_read,

81
fs/ext4/hash.c
Просмотреть файл

@ -35,23 +35,43 @@ static void TEA_transform(__u32 buf[4], __u32 const in[])
/* The old legacy hash */
static __u32 dx_hack_hash(const char *name, int len)
static __u32 dx_hack_hash_unsigned(const char *name, int len)
{
__u32 hash0 = 0x12a3fe2d, hash1 = 0x37abe8f9;
while (len--) {
__u32 hash = hash1 + (hash0 ^ (*name++ * 7152373));
__u32 hash, hash0 = 0x12a3fe2d, hash1 = 0x37abe8f9;
const unsigned char *ucp = (const unsigned char *) name;
if (hash & 0x80000000) hash -= 0x7fffffff;
while (len--) {
hash = hash1 + (hash0 ^ (((int) *ucp++) * 7152373));
if (hash & 0x80000000)
hash -= 0x7fffffff;
hash1 = hash0;
hash0 = hash;
}
return (hash0 << 1);
return hash0 << 1;
}
static void str2hashbuf(const char *msg, int len, __u32 *buf, int num)
static __u32 dx_hack_hash_signed(const char *name, int len)
{
__u32 hash, hash0 = 0x12a3fe2d, hash1 = 0x37abe8f9;
const signed char *scp = (const signed char *) name;
while (len--) {
hash = hash1 + (hash0 ^ (((int) *scp++) * 7152373));
if (hash & 0x80000000)
hash -= 0x7fffffff;
hash1 = hash0;
hash0 = hash;
}
return hash0 << 1;
}
static void str2hashbuf_signed(const char *msg, int len, __u32 *buf, int num)
{
__u32 pad, val;
int i;
const signed char *scp = (const signed char *) msg;
pad = (__u32)len | ((__u32)len << 8);
pad |= pad << 16;
@ -62,7 +82,35 @@ static void str2hashbuf(const char *msg, int len, __u32 *buf, int num)
for (i = 0; i < len; i++) {
if ((i % 4) == 0)
val = pad;
val = msg[i] + (val << 8);
val = ((int) scp[i]) + (val << 8);
if ((i % 4) == 3) {
*buf++ = val;
val = pad;
num--;
}
}
if (--num >= 0)
*buf++ = val;
while (--num >= 0)
*buf++ = pad;
}
static void str2hashbuf_unsigned(const char *msg, int len, __u32 *buf, int num)
{
__u32 pad, val;
int i;
const unsigned char *ucp = (const unsigned char *) msg;
pad = (__u32)len | ((__u32)len << 8);
pad |= pad << 16;
val = pad;
if (len > num*4)
len = num * 4;
for (i = 0; i < len; i++) {
if ((i % 4) == 0)
val = pad;
val = ((int) ucp[i]) + (val << 8);
if ((i % 4) == 3) {
*buf++ = val;
val = pad;
@ -95,6 +143,8 @@ int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
const char *p;
int i;
__u32 in[8], buf[4];
void (*str2hashbuf)(const char *, int, __u32 *, int) =
str2hashbuf_signed;
/* Initialize the default seed for the hash checksum functions */
buf[0] = 0x67452301;
@ -113,13 +163,18 @@ int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
}
switch (hinfo->hash_version) {
case DX_HASH_LEGACY:
hash = dx_hack_hash(name, len);
case DX_HASH_LEGACY_UNSIGNED:
hash = dx_hack_hash_unsigned(name, len);
break;
case DX_HASH_LEGACY:
hash = dx_hack_hash_signed(name, len);
break;
case DX_HASH_HALF_MD4_UNSIGNED:
str2hashbuf = str2hashbuf_unsigned;
case DX_HASH_HALF_MD4:
p = name;
while (len > 0) {
str2hashbuf(p, len, in, 8);
(*str2hashbuf)(p, len, in, 8);
half_md4_transform(buf, in);
len -= 32;
p += 32;
@ -127,10 +182,12 @@ int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
minor_hash = buf[2];
hash = buf[1];
break;
case DX_HASH_TEA_UNSIGNED:
str2hashbuf = str2hashbuf_unsigned;
case DX_HASH_TEA:
p = name;
while (len > 0) {
str2hashbuf(p, len, in, 4);
(*str2hashbuf)(p, len, in, 4);
TEA_transform(buf, in);
len -= 16;
p += 16;

324
fs/ext4/ialloc.c
Просмотреть файл

@ -74,17 +74,17 @@ unsigned ext4_init_inode_bitmap(struct super_block *sb, struct buffer_head *bh,
/* If checksum is bad mark all blocks and inodes use to prevent
* allocation, essentially implementing a per-group read-only flag. */
if (!ext4_group_desc_csum_verify(sbi, block_group, gdp)) {
ext4_error(sb, __func__, "Checksum bad for group %lu\n",
ext4_error(sb, __func__, "Checksum bad for group %u",
block_group);
gdp->bg_free_blocks_count = 0;
gdp->bg_free_inodes_count = 0;
gdp->bg_itable_unused = 0;
ext4_free_blks_set(sb, gdp, 0);
ext4_free_inodes_set(sb, gdp, 0);
ext4_itable_unused_set(sb, gdp, 0);
memset(bh->b_data, 0xff, sb->s_blocksize);
return 0;
}
memset(bh->b_data, 0, (EXT4_INODES_PER_GROUP(sb) + 7) / 8);
mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), EXT4_BLOCKS_PER_GROUP(sb),
mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), sb->s_blocksize * 8,
bh->b_data);
return EXT4_INODES_PER_GROUP(sb);
@ -111,29 +111,49 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
if (unlikely(!bh)) {
ext4_error(sb, __func__,
"Cannot read inode bitmap - "
"block_group = %lu, inode_bitmap = %llu",
"block_group = %u, inode_bitmap = %llu",
block_group, bitmap_blk);
return NULL;
}
if (buffer_uptodate(bh) &&
!(desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)))
if (bitmap_uptodate(bh))
return bh;
lock_buffer(bh);
if (bitmap_uptodate(bh)) {
unlock_buffer(bh);
return bh;
}
spin_lock(sb_bgl_lock(EXT4_SB(sb), block_group));
if (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) {
ext4_init_inode_bitmap(sb, bh, block_group, desc);
set_bitmap_uptodate(bh);
set_buffer_uptodate(bh);
unlock_buffer(bh);
spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group));
unlock_buffer(bh);
return bh;
}
spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group));
if (buffer_uptodate(bh)) {
/*
* if not uninit if bh is uptodate,
* bitmap is also uptodate
*/
set_bitmap_uptodate(bh);
unlock_buffer(bh);
return bh;
}
/*
* submit the buffer_head for read. We can
* safely mark the bitmap as uptodate now.
* We do it here so the bitmap uptodate bit
* get set with buffer lock held.
*/
set_bitmap_uptodate(bh);
if (bh_submit_read(bh) < 0) {
put_bh(bh);
ext4_error(sb, __func__,
"Cannot read inode bitmap - "
"block_group = %lu, inode_bitmap = %llu",
"block_group = %u, inode_bitmap = %llu",
block_group, bitmap_blk);
return NULL;
}
@ -168,7 +188,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
struct ext4_group_desc *gdp;
struct ext4_super_block *es;
struct ext4_sb_info *sbi;
int fatal = 0, err;
int fatal = 0, err, count;
ext4_group_t flex_group;
if (atomic_read(&inode->i_count) > 1) {
@ -190,6 +210,11 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
ino = inode->i_ino;
ext4_debug("freeing inode %lu\n", ino);
trace_mark(ext4_free_inode,
"dev %s ino %lu mode %d uid %lu gid %lu bocks %llu",
sb->s_id, inode->i_ino, inode->i_mode,
(unsigned long) inode->i_uid, (unsigned long) inode->i_gid,
(unsigned long long) inode->i_blocks);
/*
* Note: we must free any quota before locking the superblock,
@ -236,9 +261,12 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
if (gdp) {
spin_lock(sb_bgl_lock(sbi, block_group));
le16_add_cpu(&gdp->bg_free_inodes_count, 1);
if (is_directory)
le16_add_cpu(&gdp->bg_used_dirs_count, -1);
count = ext4_free_inodes_count(sb, gdp) + 1;
ext4_free_inodes_set(sb, gdp, count);
if (is_directory) {
count = ext4_used_dirs_count(sb, gdp) - 1;
ext4_used_dirs_set(sb, gdp, count);
}
gdp->bg_checksum = ext4_group_desc_csum(sbi,
block_group, gdp);
spin_unlock(sb_bgl_lock(sbi, block_group));
@ -253,12 +281,12 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
spin_unlock(sb_bgl_lock(sbi, flex_group));
}
}
BUFFER_TRACE(bh2, "call ext4_journal_dirty_metadata");
err = ext4_journal_dirty_metadata(handle, bh2);
BUFFER_TRACE(bh2, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, NULL, bh2);
if (!fatal) fatal = err;
}
BUFFER_TRACE(bitmap_bh, "call ext4_journal_dirty_metadata");
err = ext4_journal_dirty_metadata(handle, bitmap_bh);
BUFFER_TRACE(bitmap_bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh);
if (!fatal)
fatal = err;
sb->s_dirt = 1;
@ -291,13 +319,13 @@ static int find_group_dir(struct super_block *sb, struct inode *parent,
for (group = 0; group < ngroups; group++) {
desc = ext4_get_group_desc(sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
if (!desc || !ext4_free_inodes_count(sb, desc))
continue;
if (le16_to_cpu(desc->bg_free_inodes_count) < avefreei)
if (ext4_free_inodes_count(sb, desc) < avefreei)
continue;
if (!best_desc ||
(le16_to_cpu(desc->bg_free_blocks_count) >
le16_to_cpu(best_desc->bg_free_blocks_count))) {
(ext4_free_blks_count(sb, desc) >
ext4_free_blks_count(sb, best_desc))) {
*best_group = group;
best_desc = desc;
ret = 0;
@ -369,7 +397,7 @@ found_flexbg:
for (i = best_flex * flex_size; i < ngroups &&
i < (best_flex + 1) * flex_size; i++) {
desc = ext4_get_group_desc(sb, i, &bh);
if (le16_to_cpu(desc->bg_free_inodes_count)) {
if (ext4_free_inodes_count(sb, desc)) {
*best_group = i;
goto out;
}
@ -443,17 +471,17 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent,
for (i = 0; i < ngroups; i++) {
grp = (parent_group + i) % ngroups;
desc = ext4_get_group_desc(sb, grp, NULL);
if (!desc || !desc->bg_free_inodes_count)
if (!desc || !ext4_free_inodes_count(sb, desc))
continue;
if (le16_to_cpu(desc->bg_used_dirs_count) >= best_ndir)
if (ext4_used_dirs_count(sb, desc) >= best_ndir)
continue;
if (le16_to_cpu(desc->bg_free_inodes_count) < avefreei)
if (ext4_free_inodes_count(sb, desc) < avefreei)
continue;
if (le16_to_cpu(desc->bg_free_blocks_count) < avefreeb)
if (ext4_free_blks_count(sb, desc) < avefreeb)
continue;
*group = grp;
ret = 0;
best_ndir = le16_to_cpu(desc->bg_used_dirs_count);
best_ndir = ext4_used_dirs_count(sb, desc);
}
if (ret == 0)
return ret;
@ -479,13 +507,13 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent,
for (i = 0; i < ngroups; i++) {
*group = (parent_group + i) % ngroups;
desc = ext4_get_group_desc(sb, *group, NULL);
if (!desc || !desc->bg_free_inodes_count)
if (!desc || !ext4_free_inodes_count(sb, desc))
continue;
if (le16_to_cpu(desc->bg_used_dirs_count) >= max_dirs)
if (ext4_used_dirs_count(sb, desc) >= max_dirs)
continue;
if (le16_to_cpu(desc->bg_free_inodes_count) < min_inodes)
if (ext4_free_inodes_count(sb, desc) < min_inodes)
continue;
if (le16_to_cpu(desc->bg_free_blocks_count) < min_blocks)
if (ext4_free_blks_count(sb, desc) < min_blocks)
continue;
return 0;
}
@ -494,8 +522,8 @@ fallback:
for (i = 0; i < ngroups; i++) {
*group = (parent_group + i) % ngroups;
desc = ext4_get_group_desc(sb, *group, NULL);
if (desc && desc->bg_free_inodes_count &&
le16_to_cpu(desc->bg_free_inodes_count) >= avefreei)
if (desc && ext4_free_inodes_count(sb, desc) &&
ext4_free_inodes_count(sb, desc) >= avefreei)
return 0;
}
@ -524,8 +552,8 @@ static int find_group_other(struct super_block *sb, struct inode *parent,
*/
*group = parent_group;
desc = ext4_get_group_desc(sb, *group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
le16_to_cpu(desc->bg_free_blocks_count))
if (desc && ext4_free_inodes_count(sb, desc) &&
ext4_free_blks_count(sb, desc))
return 0;
/*
@ -548,8 +576,8 @@ static int find_group_other(struct super_block *sb, struct inode *parent,
if (*group >= ngroups)
*group -= ngroups;
desc = ext4_get_group_desc(sb, *group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
le16_to_cpu(desc->bg_free_blocks_count))
if (desc && ext4_free_inodes_count(sb, desc) &&
ext4_free_blks_count(sb, desc))
return 0;
}
@ -562,13 +590,86 @@ static int find_group_other(struct super_block *sb, struct inode *parent,
if (++*group >= ngroups)
*group = 0;
desc = ext4_get_group_desc(sb, *group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count))
if (desc && ext4_free_inodes_count(sb, desc))
return 0;
}
return -1;
}
/*
* claim the inode from the inode bitmap. If the group
* is uninit we need to take the groups's sb_bgl_lock
* and clear the uninit flag. The inode bitmap update
* and group desc uninit flag clear should be done
* after holding sb_bgl_lock so that ext4_read_inode_bitmap
* doesn't race with the ext4_claim_inode
*/
static int ext4_claim_inode(struct super_block *sb,
struct buffer_head *inode_bitmap_bh,
unsigned long ino, ext4_group_t group, int mode)
{
int free = 0, retval = 0, count;
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL);
spin_lock(sb_bgl_lock(sbi, group));
if (ext4_set_bit(ino, inode_bitmap_bh->b_data)) {
/* not a free inode */
retval = 1;
goto err_ret;
}
ino++;
if ((group == 0 && ino < EXT4_FIRST_INO(sb)) ||
ino > EXT4_INODES_PER_GROUP(sb)) {
spin_unlock(sb_bgl_lock(sbi, group));
ext4_error(sb, __func__,
"reserved inode or inode > inodes count - "
"block_group = %u, inode=%lu", group,
ino + group * EXT4_INODES_PER_GROUP(sb));
return 1;
}
/* If we didn't allocate from within the initialized part of the inode
* table then we need to initialize up to this inode. */
if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) {
gdp->bg_flags &= cpu_to_le16(~EXT4_BG_INODE_UNINIT);
/* When marking the block group with
* ~EXT4_BG_INODE_UNINIT we don't want to depend
* on the value of bg_itable_unused even though
* mke2fs could have initialized the same for us.
* Instead we calculated the value below
*/
free = 0;
} else {
free = EXT4_INODES_PER_GROUP(sb) -
ext4_itable_unused_count(sb, gdp);
}
/*
* Check the relative inode number against the last used
* relative inode number in this group. if it is greater
* we need to update the bg_itable_unused count
*
*/
if (ino > free)
ext4_itable_unused_set(sb, gdp,
(EXT4_INODES_PER_GROUP(sb) - ino));
}
count = ext4_free_inodes_count(sb, gdp) - 1;
ext4_free_inodes_set(sb, gdp, count);
if (S_ISDIR(mode)) {
count = ext4_used_dirs_count(sb, gdp) + 1;
ext4_used_dirs_set(sb, gdp, count);
}
gdp->bg_checksum = ext4_group_desc_csum(sbi, group, gdp);
err_ret:
spin_unlock(sb_bgl_lock(sbi, group));
return retval;
}
/*
* There are two policies for allocating an inode. If the new inode is
* a directory, then a forward search is made for a block group with both
@ -582,8 +683,8 @@ static int find_group_other(struct super_block *sb, struct inode *parent,
struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
{
struct super_block *sb;
struct buffer_head *bitmap_bh = NULL;
struct buffer_head *bh2;
struct buffer_head *inode_bitmap_bh = NULL;
struct buffer_head *group_desc_bh;
ext4_group_t group = 0;
unsigned long ino = 0;
struct inode *inode;
@ -602,6 +703,8 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
return ERR_PTR(-EPERM);
sb = dir->i_sb;
trace_mark(ext4_request_inode, "dev %s dir %lu mode %d", sb->s_id,
dir->i_ino, mode);
inode = new_inode(sb);
if (!inode)
return ERR_PTR(-ENOMEM);
@ -631,40 +734,52 @@ got_group:
for (i = 0; i < sbi->s_groups_count; i++) {
err = -EIO;
gdp = ext4_get_group_desc(sb, group, &bh2);
gdp = ext4_get_group_desc(sb, group, &group_desc_bh);
if (!gdp)
goto fail;
brelse(bitmap_bh);
bitmap_bh = ext4_read_inode_bitmap(sb, group);
if (!bitmap_bh)
brelse(inode_bitmap_bh);
inode_bitmap_bh = ext4_read_inode_bitmap(sb, group);
if (!inode_bitmap_bh)
goto fail;
ino = 0;
repeat_in_this_group:
ino = ext4_find_next_zero_bit((unsigned long *)
bitmap_bh->b_data, EXT4_INODES_PER_GROUP(sb), ino);
inode_bitmap_bh->b_data,
EXT4_INODES_PER_GROUP(sb), ino);
if (ino < EXT4_INODES_PER_GROUP(sb)) {
BUFFER_TRACE(bitmap_bh, "get_write_access");
err = ext4_journal_get_write_access(handle, bitmap_bh);
BUFFER_TRACE(inode_bitmap_bh, "get_write_access");
err = ext4_journal_get_write_access(handle,
inode_bitmap_bh);
if (err)
goto fail;
if (!ext4_set_bit_atomic(sb_bgl_lock(sbi, group),
ino, bitmap_bh->b_data)) {
BUFFER_TRACE(group_desc_bh, "get_write_access");
err = ext4_journal_get_write_access(handle,
group_desc_bh);
if (err)
goto fail;
if (!ext4_claim_inode(sb, inode_bitmap_bh,
ino, group, mode)) {
/* we won it */
BUFFER_TRACE(bitmap_bh,
"call ext4_journal_dirty_metadata");
err = ext4_journal_dirty_metadata(handle,
bitmap_bh);
BUFFER_TRACE(inode_bitmap_bh,
"call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle,
inode,
inode_bitmap_bh);
if (err)
goto fail;
/* zero bit is inode number 1*/
ino++;
goto got;
}
/* we lost it */
jbd2_journal_release_buffer(handle, bitmap_bh);
ext4_handle_release_buffer(handle, inode_bitmap_bh);
ext4_handle_release_buffer(handle, group_desc_bh);
if (++ino < EXT4_INODES_PER_GROUP(sb))
goto repeat_in_this_group;
@ -684,30 +799,16 @@ repeat_in_this_group:
goto out;
got:
ino++;
if ((group == 0 && ino < EXT4_FIRST_INO(sb)) ||
ino > EXT4_INODES_PER_GROUP(sb)) {
ext4_error(sb, __func__,
"reserved inode or inode > inodes count - "
"block_group = %lu, inode=%lu", group,
ino + group * EXT4_INODES_PER_GROUP(sb));
err = -EIO;
goto fail;
}
BUFFER_TRACE(bh2, "get_write_access");
err = ext4_journal_get_write_access(handle, bh2);
if (err) goto fail;
/* We may have to initialize the block bitmap if it isn't already */
if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM) &&
gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
struct buffer_head *block_bh = ext4_read_block_bitmap(sb, group);
struct buffer_head *block_bitmap_bh;
BUFFER_TRACE(block_bh, "get block bitmap access");
err = ext4_journal_get_write_access(handle, block_bh);
block_bitmap_bh = ext4_read_block_bitmap(sb, group);
BUFFER_TRACE(block_bitmap_bh, "get block bitmap access");
err = ext4_journal_get_write_access(handle, block_bitmap_bh);
if (err) {
brelse(block_bh);
brelse(block_bitmap_bh);
goto fail;
}
@ -715,9 +816,9 @@ got:
spin_lock(sb_bgl_lock(sbi, group));
/* recheck and clear flag under lock if we still need to */
if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
free = ext4_free_blocks_after_init(sb, group, gdp);
gdp->bg_free_blocks_count = cpu_to_le16(free);
gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
ext4_free_blks_set(sb, gdp, free);
gdp->bg_checksum = ext4_group_desc_csum(sbi, group,
gdp);
}
@ -725,55 +826,19 @@ got:
/* Don't need to dirty bitmap block if we didn't change it */
if (free) {
BUFFER_TRACE(block_bh, "dirty block bitmap");
err = ext4_journal_dirty_metadata(handle, block_bh);
BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap");
err = ext4_handle_dirty_metadata(handle,
NULL, block_bitmap_bh);
}
brelse(block_bh);
brelse(block_bitmap_bh);
if (err)
goto fail;
}
spin_lock(sb_bgl_lock(sbi, group));
/* If we didn't allocate from within the initialized part of the inode
* table then we need to initialize up to this inode. */
if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) {
gdp->bg_flags &= cpu_to_le16(~EXT4_BG_INODE_UNINIT);
/* When marking the block group with
* ~EXT4_BG_INODE_UNINIT we don't want to depend
* on the value of bg_itable_unused even though
* mke2fs could have initialized the same for us.
* Instead we calculated the value below
*/
free = 0;
} else {
free = EXT4_INODES_PER_GROUP(sb) -
le16_to_cpu(gdp->bg_itable_unused);
}
/*
* Check the relative inode number against the last used
* relative inode number in this group. if it is greater
* we need to update the bg_itable_unused count
*
*/
if (ino > free)
gdp->bg_itable_unused =
cpu_to_le16(EXT4_INODES_PER_GROUP(sb) - ino);
}
le16_add_cpu(&gdp->bg_free_inodes_count, -1);
if (S_ISDIR(mode)) {
le16_add_cpu(&gdp->bg_used_dirs_count, 1);
}
gdp->bg_checksum = ext4_group_desc_csum(sbi, group, gdp);
spin_unlock(sb_bgl_lock(sbi, group));
BUFFER_TRACE(bh2, "call ext4_journal_dirty_metadata");
err = ext4_journal_dirty_metadata(handle, bh2);
if (err) goto fail;
BUFFER_TRACE(group_desc_bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, NULL, group_desc_bh);
if (err)
goto fail;
percpu_counter_dec(&sbi->s_freeinodes_counter);
if (S_ISDIR(mode))
@ -825,7 +890,7 @@ got:
ext4_set_inode_flags(inode);
if (IS_DIRSYNC(inode))
handle->h_sync = 1;
ext4_handle_sync(handle);
if (insert_inode_locked(inode) < 0) {
err = -EINVAL;
goto fail_drop;
@ -852,7 +917,7 @@ got:
if (err)
goto fail_free_drop;
if (test_opt(sb, EXTENTS)) {
if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) {
/* set extent flag only for directory, file and normal symlink*/
if (S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode)) {
EXT4_I(inode)->i_flags |= EXT4_EXTENTS_FL;
@ -867,6 +932,8 @@ got:
}
ext4_debug("allocating inode %lu\n", inode->i_ino);
trace_mark(ext4_allocate_inode, "dev %s ino %lu dir %lu mode %d",
sb->s_id, inode->i_ino, dir->i_ino, mode);
goto really_out;
fail:
ext4_std_error(sb, err);
@ -874,7 +941,7 @@ out:
iput(inode);
ret = ERR_PTR(err);
really_out:
brelse(bitmap_bh);
brelse(inode_bitmap_bh);
return ret;
fail_free_drop:
@ -886,7 +953,7 @@ fail_drop:
inode->i_nlink = 0;
unlock_new_inode(inode);
iput(inode);
brelse(bitmap_bh);
brelse(inode_bitmap_bh);
return ERR_PTR(err);
}
@ -985,7 +1052,7 @@ unsigned long ext4_count_free_inodes(struct super_block *sb)
gdp = ext4_get_group_desc(sb, i, NULL);
if (!gdp)
continue;
desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
desc_count += ext4_free_inodes_count(sb, gdp);
brelse(bitmap_bh);
bitmap_bh = ext4_read_inode_bitmap(sb, i);
if (!bitmap_bh)
@ -993,7 +1060,7 @@ unsigned long ext4_count_free_inodes(struct super_block *sb)
x = ext4_count_free(bitmap_bh, EXT4_INODES_PER_GROUP(sb) / 8);
printk(KERN_DEBUG "group %lu: stored = %d, counted = %lu\n",
i, le16_to_cpu(gdp->bg_free_inodes_count), x);
i, ext4_free_inodes_count(sb, gdp), x);
bitmap_count += x;
}
brelse(bitmap_bh);
@ -1007,7 +1074,7 @@ unsigned long ext4_count_free_inodes(struct super_block *sb)
gdp = ext4_get_group_desc(sb, i, NULL);
if (!gdp)
continue;
desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
desc_count += ext4_free_inodes_count(sb, gdp);
cond_resched();
}
return desc_count;
@ -1024,8 +1091,7 @@ unsigned long ext4_count_dirs(struct super_block * sb)
struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL);
if (!gdp)
continue;
count += le16_to_cpu(gdp->bg_used_dirs_count);
count += ext4_used_dirs_count(sb, gdp);
}
return count;
}

309
fs/ext4/inode.c
Просмотреть файл

@ -72,12 +72,17 @@ static int ext4_inode_is_fast_symlink(struct inode *inode)
* "bh" may be NULL: a metadata block may have been freed from memory
* but there may still be a record of it in the journal, and that record
* still needs to be revoked.
*
* If the handle isn't valid we're not journaling so there's nothing to do.
*/
int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode,
struct buffer_head *bh, ext4_fsblk_t blocknr)
{
int err;
if (!ext4_handle_valid(handle))
return 0;
might_sleep();
BUFFER_TRACE(bh, "enter");
@ -170,7 +175,9 @@ static handle_t *start_transaction(struct inode *inode)
*/
static int try_to_extend_transaction(handle_t *handle, struct inode *inode)
{
if (handle->h_buffer_credits > EXT4_RESERVE_TRANS_BLOCKS)
if (!ext4_handle_valid(handle))
return 0;
if (ext4_handle_has_enough_credits(handle, EXT4_RESERVE_TRANS_BLOCKS+1))
return 0;
if (!ext4_journal_extend(handle, blocks_for_truncate(inode)))
return 0;
@ -184,6 +191,7 @@ static int try_to_extend_transaction(handle_t *handle, struct inode *inode)
*/
static int ext4_journal_test_restart(handle_t *handle, struct inode *inode)
{
BUG_ON(EXT4_JOURNAL(inode) == NULL);
jbd_debug(2, "restarting handle %p\n", handle);
return ext4_journal_restart(handle, blocks_for_truncate(inode));
}
@ -216,7 +224,7 @@ void ext4_delete_inode(struct inode *inode)
}
if (IS_SYNC(inode))
handle->h_sync = 1;
ext4_handle_sync(handle);
inode->i_size = 0;
err = ext4_mark_inode_dirty(handle, inode);
if (err) {
@ -233,7 +241,7 @@ void ext4_delete_inode(struct inode *inode)
* enough credits left in the handle to remove the inode from
* the orphan list and set the dtime field.
*/
if (handle->h_buffer_credits < 3) {
if (!ext4_handle_has_enough_credits(handle, 3)) {
err = ext4_journal_extend(handle, 3);
if (err > 0)
err = ext4_journal_restart(handle, 3);
@ -506,10 +514,10 @@ static ext4_fsblk_t ext4_find_goal(struct inode *inode, ext4_lblk_t block,
* return the total number of blocks to be allocate, including the
* direct and indirect blocks.
*/
static int ext4_blks_to_allocate(Indirect *branch, int k, unsigned long blks,
static int ext4_blks_to_allocate(Indirect *branch, int k, unsigned int blks,
int blocks_to_boundary)
{
unsigned long count = 0;
unsigned int count = 0;
/*
* Simple case, [t,d]Indirect block(s) has not allocated yet
@ -547,6 +555,7 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
int indirect_blks, int blks,
ext4_fsblk_t new_blocks[4], int *err)
{
struct ext4_allocation_request ar;
int target, i;
unsigned long count = 0, blk_allocated = 0;
int index = 0;
@ -595,10 +604,17 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
if (!target)
goto allocated;
/* Now allocate data blocks */
count = target;
/* allocating blocks for data blocks */
current_block = ext4_new_blocks(handle, inode, iblock,
goal, &count, err);
memset(&ar, 0, sizeof(ar));
ar.inode = inode;
ar.goal = goal;
ar.len = target;
ar.logical = iblock;
if (S_ISREG(inode->i_mode))
/* enable in-core preallocation only for regular files */
ar.flags = EXT4_MB_HINT_DATA;
current_block = ext4_mb_new_blocks(handle, &ar, err);
if (*err && (target == blks)) {
/*
* if the allocation failed and we didn't allocate
@ -614,7 +630,7 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
*/
new_blocks[index] = current_block;
}
blk_allocated += count;
blk_allocated += ar.len;
}
allocated:
/* total number of blocks allocated for direct blocks */
@ -709,8 +725,8 @@ static int ext4_alloc_branch(handle_t *handle, struct inode *inode,
set_buffer_uptodate(bh);
unlock_buffer(bh);
BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
err = ext4_journal_dirty_metadata(handle, bh);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, inode, bh);
if (err)
goto failed;
}
@ -792,8 +808,8 @@ static int ext4_splice_branch(handle_t *handle, struct inode *inode,
* generic_commit_write->__mark_inode_dirty->ext4_dirty_inode.
*/
jbd_debug(5, "splicing indirect only\n");
BUFFER_TRACE(where->bh, "call ext4_journal_dirty_metadata");
err = ext4_journal_dirty_metadata(handle, where->bh);
BUFFER_TRACE(where->bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, inode, where->bh);
if (err)
goto err_out;
} else {
@ -840,10 +856,10 @@ err_out:
* down_read(&EXT4_I(inode)->i_data_sem) if not allocating file system block
* (ie, create is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem)
*/
int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock, unsigned long maxblocks,
struct buffer_head *bh_result,
int create, int extend_disksize)
static int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock, unsigned int maxblocks,
struct buffer_head *bh_result,
int create, int extend_disksize)
{
int err = -EIO;
ext4_lblk_t offsets[4];
@ -1045,7 +1061,7 @@ static void ext4_da_update_reserve_space(struct inode *inode, int used)
* It returns the error in case of allocation failure.
*/
int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block,
unsigned long max_blocks, struct buffer_head *bh,
unsigned int max_blocks, struct buffer_head *bh,
int create, int extend_disksize, int flag)
{
int retval;
@ -1221,8 +1237,8 @@ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode,
set_buffer_uptodate(bh);
}
unlock_buffer(bh);
BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
err = ext4_journal_dirty_metadata(handle, bh);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, inode, bh);
if (!fatal)
fatal = err;
} else {
@ -1335,6 +1351,10 @@ static int ext4_write_begin(struct file *file, struct address_space *mapping,
pgoff_t index;
unsigned from, to;
trace_mark(ext4_write_begin,
"dev %s ino %lu pos %llu len %u flags %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, flags);
index = pos >> PAGE_CACHE_SHIFT;
from = pos & (PAGE_CACHE_SIZE - 1);
to = from + len;
@ -1387,7 +1407,7 @@ static int write_end_fn(handle_t *handle, struct buffer_head *bh)
if (!buffer_mapped(bh) || buffer_freed(bh))
return 0;
set_buffer_uptodate(bh);
return ext4_journal_dirty_metadata(handle, bh);
return ext4_handle_dirty_metadata(handle, NULL, bh);
}
/*
@ -1406,6 +1426,10 @@ static int ext4_ordered_write_end(struct file *file,
struct inode *inode = mapping->host;
int ret = 0, ret2;
trace_mark(ext4_ordered_write_end,
"dev %s ino %lu pos %llu len %u copied %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, copied);
ret = ext4_jbd2_file_inode(handle, inode);
if (ret == 0) {
@ -1444,6 +1468,10 @@ static int ext4_writeback_write_end(struct file *file,
int ret = 0, ret2;
loff_t new_i_size;
trace_mark(ext4_writeback_write_end,
"dev %s ino %lu pos %llu len %u copied %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, copied);
new_i_size = pos + copied;
if (new_i_size > EXT4_I(inode)->i_disksize) {
ext4_update_i_disksize(inode, new_i_size);
@ -1479,6 +1507,10 @@ static int ext4_journalled_write_end(struct file *file,
unsigned from, to;
loff_t new_i_size;
trace_mark(ext4_journalled_write_end,
"dev %s ino %lu pos %llu len %u copied %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, copied);
from = pos & (PAGE_CACHE_SIZE - 1);
to = from + len;
@ -1625,7 +1657,7 @@ struct mpage_da_data {
get_block_t *get_block;
struct writeback_control *wbc;
int io_done;
long pages_written;
int pages_written;
int retval;
};
@ -1645,35 +1677,39 @@ struct mpage_da_data {
*/
static int mpage_da_submit_io(struct mpage_da_data *mpd)
{
struct address_space *mapping = mpd->inode->i_mapping;
int ret = 0, err, nr_pages, i;
unsigned long index, end;
struct pagevec pvec;
long pages_skipped;
struct pagevec pvec;
unsigned long index, end;
int ret = 0, err, nr_pages, i;
struct inode *inode = mpd->inode;
struct address_space *mapping = inode->i_mapping;
BUG_ON(mpd->next_page <= mpd->first_page);
pagevec_init(&pvec, 0);
/*
* We need to start from the first_page to the next_page - 1
* to make sure we also write the mapped dirty buffer_heads.
* If we look at mpd->lbh.b_blocknr we would only be looking
* at the currently mapped buffer_heads.
*/
index = mpd->first_page;
end = mpd->next_page - 1;
pagevec_init(&pvec, 0);
while (index <= end) {
/*
* We can use PAGECACHE_TAG_DIRTY lookup here because
* even though we have cleared the dirty flag on the page
* We still keep the page in the radix tree with tag
* PAGECACHE_TAG_DIRTY. See clear_page_dirty_for_io.
* The PAGECACHE_TAG_DIRTY is cleared in set_page_writeback
* which is called via the below writepage callback.
*/
nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
PAGECACHE_TAG_DIRTY,
min(end - index,
(pgoff_t)PAGEVEC_SIZE-1) + 1);
nr_pages = pagevec_lookup(&pvec, mapping, index, PAGEVEC_SIZE);
if (nr_pages == 0)
break;
for (i = 0; i < nr_pages; i++) {
struct page *page = pvec.pages[i];
index = page->index;
if (index > end)
break;
index++;
BUG_ON(!PageLocked(page));
BUG_ON(PageWriteback(page));
pages_skipped = mpd->wbc->pages_skipped;
err = mapping->a_ops->writepage(page, mpd->wbc);
if (!err && (pages_skipped == mpd->wbc->pages_skipped))
@ -1831,13 +1867,13 @@ static void ext4_print_free_blocks(struct inode *inode)
ext4_count_free_blocks(inode->i_sb));
printk(KERN_EMERG "Free/Dirty block details\n");
printk(KERN_EMERG "free_blocks=%lld\n",
percpu_counter_sum(&sbi->s_freeblocks_counter));
(long long)percpu_counter_sum(&sbi->s_freeblocks_counter));
printk(KERN_EMERG "dirty_blocks=%lld\n",
percpu_counter_sum(&sbi->s_dirtyblocks_counter));
(long long)percpu_counter_sum(&sbi->s_dirtyblocks_counter));
printk(KERN_EMERG "Block reservation details\n");
printk(KERN_EMERG "i_reserved_data_blocks=%lu\n",
printk(KERN_EMERG "i_reserved_data_blocks=%u\n",
EXT4_I(inode)->i_reserved_data_blocks);
printk(KERN_EMERG "i_reserved_meta_blocks=%lu\n",
printk(KERN_EMERG "i_reserved_meta_blocks=%u\n",
EXT4_I(inode)->i_reserved_meta_blocks);
return;
}
@ -2087,11 +2123,29 @@ static int __mpage_da_writepage(struct page *page,
bh = head;
do {
BUG_ON(buffer_locked(bh));
/*
* We need to try to allocate
* unmapped blocks in the same page.
* Otherwise we won't make progress
* with the page in ext4_da_writepage
*/
if (buffer_dirty(bh) &&
(!buffer_mapped(bh) || buffer_delay(bh))) {
mpage_add_bh_to_extent(mpd, logical, bh);
if (mpd->io_done)
return MPAGE_DA_EXTENT_TAIL;
} else if (buffer_dirty(bh) && (buffer_mapped(bh))) {
/*
* mapped dirty buffer. We need to update
* the b_state because we look at
* b_state in mpage_da_map_blocks. We don't
* update b_size because if we find an
* unmapped buffer_head later we need to
* use the b_state flag of that buffer_head.
*/
if (mpd->lbh.b_size == 0)
mpd->lbh.b_state =
bh->b_state & BH_FLAGS;
}
logical++;
} while ((bh = bh->b_this_page) != head);
@ -2269,10 +2323,13 @@ static int ext4_da_writepage(struct page *page,
{
int ret = 0;
loff_t size;
unsigned long len;
unsigned int len;
struct buffer_head *page_bufs;
struct inode *inode = page->mapping->host;
trace_mark(ext4_da_writepage,
"dev %s ino %lu page_index %lu",
inode->i_sb->s_id, inode->i_ino, page->index);
size = i_size_read(inode);
if (page->index == size >> PAGE_CACHE_SHIFT)
len = size & ~PAGE_CACHE_MASK;
@ -2378,10 +2435,25 @@ static int ext4_da_writepages(struct address_space *mapping,
struct mpage_da_data mpd;
struct inode *inode = mapping->host;
int no_nrwrite_index_update;
long pages_written = 0, pages_skipped;
int pages_written = 0;
long pages_skipped;
int needed_blocks, ret = 0, nr_to_writebump = 0;
struct ext4_sb_info *sbi = EXT4_SB(mapping->host->i_sb);
trace_mark(ext4_da_writepages,
"dev %s ino %lu nr_t_write %ld "
"pages_skipped %ld range_start %llu "
"range_end %llu nonblocking %d "
"for_kupdate %d for_reclaim %d "
"for_writepages %d range_cyclic %d",
inode->i_sb->s_id, inode->i_ino,
wbc->nr_to_write, wbc->pages_skipped,
(unsigned long long) wbc->range_start,
(unsigned long long) wbc->range_end,
wbc->nonblocking, wbc->for_kupdate,
wbc->for_reclaim, wbc->for_writepages,
wbc->range_cyclic);
/*
* No pages to write? This is mainly a kludge to avoid starting
* a transaction for special inodes like journal inode on last iput()
@ -2389,6 +2461,20 @@ static int ext4_da_writepages(struct address_space *mapping,
*/
if (!mapping->nrpages || !mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
return 0;
/*
* If the filesystem has aborted, it is read-only, so return
* right away instead of dumping stack traces later on that
* will obscure the real source of the problem. We test
* EXT4_MOUNT_ABORT instead of sb->s_flag's MS_RDONLY because
* the latter could be true if the filesystem is mounted
* read-only, and in that case, ext4_da_writepages should
* *never* be called, so if that ever happens, we would want
* the stack trace.
*/
if (unlikely(sbi->s_mount_opt & EXT4_MOUNT_ABORT))
return -EROFS;
/*
* Make sure nr_to_write is >= sbi->s_mb_stream_request
* This make sure small files blocks are allocated in
@ -2433,7 +2519,7 @@ static int ext4_da_writepages(struct address_space *mapping,
handle = ext4_journal_start(inode, needed_blocks);
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
printk(KERN_EMERG "%s: jbd2_start: "
printk(KERN_CRIT "%s: jbd2_start: "
"%ld pages, ino %lu; err %d\n", __func__,
wbc->nr_to_write, inode->i_ino, ret);
dump_stack();
@ -2486,6 +2572,14 @@ out_writepages:
if (!no_nrwrite_index_update)
wbc->no_nrwrite_index_update = 0;
wbc->nr_to_write -= nr_to_writebump;
trace_mark(ext4_da_writepage_result,
"dev %s ino %lu ret %d pages_written %d "
"pages_skipped %ld congestion %d "
"more_io %d no_nrwrite_index_update %d",
inode->i_sb->s_id, inode->i_ino, ret,
pages_written, wbc->pages_skipped,
wbc->encountered_congestion, wbc->more_io,
wbc->no_nrwrite_index_update);
return ret;
}
@ -2537,6 +2631,11 @@ static int ext4_da_write_begin(struct file *file, struct address_space *mapping,
len, flags, pagep, fsdata);
}
*fsdata = (void *)0;
trace_mark(ext4_da_write_begin,
"dev %s ino %lu pos %llu len %u flags %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, flags);
retry:
/*
* With delayed allocation, we don't log the i_disksize update
@ -2626,6 +2725,10 @@ static int ext4_da_write_end(struct file *file,
}
}
trace_mark(ext4_da_write_end,
"dev %s ino %lu pos %llu len %u copied %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, copied);
start = pos & (PAGE_CACHE_SIZE - 1);
end = start + copied - 1;
@ -2718,7 +2821,10 @@ static sector_t ext4_bmap(struct address_space *mapping, sector_t block)
filemap_write_and_wait(mapping);
}
if (EXT4_I(inode)->i_state & EXT4_STATE_JDATA) {
BUG_ON(!EXT4_JOURNAL(inode) &&
EXT4_I(inode)->i_state & EXT4_STATE_JDATA);
if (EXT4_JOURNAL(inode) && EXT4_I(inode)->i_state & EXT4_STATE_JDATA) {
/*
* This is a REALLY heavyweight approach, but the use of
* bmap on dirty files is expected to be extremely rare:
@ -2836,6 +2942,9 @@ static int ext4_normal_writepage(struct page *page,
loff_t size = i_size_read(inode);
loff_t len;
trace_mark(ext4_normal_writepage,
"dev %s ino %lu page_index %lu",
inode->i_sb->s_id, inode->i_ino, page->index);
J_ASSERT(PageLocked(page));
if (page->index == size >> PAGE_CACHE_SHIFT)
len = size & ~PAGE_CACHE_MASK;
@ -2921,6 +3030,9 @@ static int ext4_journalled_writepage(struct page *page,
loff_t size = i_size_read(inode);
loff_t len;
trace_mark(ext4_journalled_writepage,
"dev %s ino %lu page_index %lu",
inode->i_sb->s_id, inode->i_ino, page->index);
J_ASSERT(PageLocked(page));
if (page->index == size >> PAGE_CACHE_SHIFT)
len = size & ~PAGE_CACHE_MASK;
@ -2989,7 +3101,10 @@ static void ext4_invalidatepage(struct page *page, unsigned long offset)
if (offset == 0)
ClearPageChecked(page);
jbd2_journal_invalidatepage(journal, page, offset);
if (journal)
jbd2_journal_invalidatepage(journal, page, offset);
else
block_invalidatepage(page, offset);
}
static int ext4_releasepage(struct page *page, gfp_t wait)
@ -2999,7 +3114,10 @@ static int ext4_releasepage(struct page *page, gfp_t wait)
WARN_ON(PageChecked(page));
if (!page_has_buffers(page))
return 0;
return jbd2_journal_try_to_free_buffers(journal, page, wait);
if (journal)
return jbd2_journal_try_to_free_buffers(journal, page, wait);
else
return try_to_free_buffers(page);
}
/*
@ -3271,7 +3389,7 @@ int ext4_block_truncate_page(handle_t *handle,
err = 0;
if (ext4_should_journal_data(inode)) {
err = ext4_journal_dirty_metadata(handle, bh);
err = ext4_handle_dirty_metadata(handle, inode, bh);
} else {
if (ext4_should_order_data(inode))
err = ext4_jbd2_file_inode(handle, inode);
@ -3395,8 +3513,8 @@ static void ext4_clear_blocks(handle_t *handle, struct inode *inode,
__le32 *p;
if (try_to_extend_transaction(handle, inode)) {
if (bh) {
BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
ext4_journal_dirty_metadata(handle, bh);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
ext4_handle_dirty_metadata(handle, inode, bh);
}
ext4_mark_inode_dirty(handle, inode);
ext4_journal_test_restart(handle, inode);
@ -3496,7 +3614,7 @@ static void ext4_free_data(handle_t *handle, struct inode *inode,
count, block_to_free_p, p);
if (this_bh) {
BUFFER_TRACE(this_bh, "call ext4_journal_dirty_metadata");
BUFFER_TRACE(this_bh, "call ext4_handle_dirty_metadata");
/*
* The buffer head should have an attached journal head at this
@ -3505,7 +3623,7 @@ static void ext4_free_data(handle_t *handle, struct inode *inode,
* the block was cleared. Check for this instead of OOPSing.
*/
if (bh2jh(this_bh))
ext4_journal_dirty_metadata(handle, this_bh);
ext4_handle_dirty_metadata(handle, inode, this_bh);
else
ext4_error(inode->i_sb, __func__,
"circular indirect block detected, "
@ -3535,7 +3653,7 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode,
ext4_fsblk_t nr;
__le32 *p;
if (is_handle_aborted(handle))
if (ext4_handle_is_aborted(handle))
return;
if (depth--) {
@ -3605,7 +3723,7 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode,
* will merely complain about releasing a free block,
* rather than leaking blocks.
*/
if (is_handle_aborted(handle))
if (ext4_handle_is_aborted(handle))
return;
if (try_to_extend_transaction(handle, inode)) {
ext4_mark_inode_dirty(handle, inode);
@ -3624,9 +3742,10 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode,
parent_bh)){
*p = 0;
BUFFER_TRACE(parent_bh,
"call ext4_journal_dirty_metadata");
ext4_journal_dirty_metadata(handle,
parent_bh);
"call ext4_handle_dirty_metadata");
ext4_handle_dirty_metadata(handle,
inode,
parent_bh);
}
}
}
@ -3814,7 +3933,7 @@ do_indirects:
* synchronous
*/
if (IS_SYNC(inode))
handle->h_sync = 1;
ext4_handle_sync(handle);
out_stop:
/*
* If this was a simple ftruncate(), and the file will remain alive
@ -3844,7 +3963,7 @@ static int __ext4_get_inode_loc(struct inode *inode,
ext4_fsblk_t block;
int inodes_per_block, inode_offset;
iloc->bh = 0;
iloc->bh = NULL;
if (!ext4_valid_inum(sb, inode->i_ino))
return -EIO;
@ -3951,7 +4070,7 @@ make_io:
num = EXT4_INODES_PER_GROUP(sb);
if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
num -= le16_to_cpu(gdp->bg_itable_unused);
num -= ext4_itable_unused_count(sb, gdp);
table += num / inodes_per_block;
if (end > table)
end = table;
@ -4313,8 +4432,8 @@ static int ext4_do_update_inode(handle_t *handle,
EXT4_SET_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_LARGE_FILE);
sb->s_dirt = 1;
handle->h_sync = 1;
err = ext4_journal_dirty_metadata(handle,
ext4_handle_sync(handle);
err = ext4_handle_dirty_metadata(handle, inode,
EXT4_SB(sb)->s_sbh);
}
}
@ -4341,9 +4460,8 @@ static int ext4_do_update_inode(handle_t *handle,
raw_inode->i_extra_isize = cpu_to_le16(ei->i_extra_isize);
}
BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
rc = ext4_journal_dirty_metadata(handle, bh);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
rc = ext4_handle_dirty_metadata(handle, inode, bh);
if (!err)
err = rc;
ei->i_state &= ~EXT4_STATE_NEW;
@ -4406,6 +4524,25 @@ int ext4_write_inode(struct inode *inode, int wait)
return ext4_force_commit(inode->i_sb);
}
int __ext4_write_dirty_metadata(struct inode *inode, struct buffer_head *bh)
{
int err = 0;
mark_buffer_dirty(bh);
if (inode && inode_needs_sync(inode)) {
sync_dirty_buffer(bh);
if (buffer_req(bh) && !buffer_uptodate(bh)) {
ext4_error(inode->i_sb, __func__,
"IO error syncing inode, "
"inode=%lu, block=%llu",
inode->i_ino,
(unsigned long long)bh->b_blocknr);
err = -EIO;
}
}
return err;
}
/*
* ext4_setattr()
*
@ -4710,16 +4847,15 @@ int
ext4_reserve_inode_write(handle_t *handle, struct inode *inode,
struct ext4_iloc *iloc)
{
int err = 0;
if (handle) {
err = ext4_get_inode_loc(inode, iloc);
if (!err) {
BUFFER_TRACE(iloc->bh, "get_write_access");
err = ext4_journal_get_write_access(handle, iloc->bh);
if (err) {
brelse(iloc->bh);
iloc->bh = NULL;
}
int err;
err = ext4_get_inode_loc(inode, iloc);
if (!err) {
BUFFER_TRACE(iloc->bh, "get_write_access");
err = ext4_journal_get_write_access(handle, iloc->bh);
if (err) {
brelse(iloc->bh);
iloc->bh = NULL;
}
}
ext4_std_error(inode->i_sb, err);
@ -4791,7 +4927,8 @@ int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode)
might_sleep();
err = ext4_reserve_inode_write(handle, inode, &iloc);
if (EXT4_I(inode)->i_extra_isize < sbi->s_want_extra_isize &&
if (ext4_handle_valid(handle) &&
EXT4_I(inode)->i_extra_isize < sbi->s_want_extra_isize &&
!(EXT4_I(inode)->i_state & EXT4_STATE_NO_EXPAND)) {
/*
* We need extra buffer credits since we may write into EA block
@ -4843,6 +4980,11 @@ void ext4_dirty_inode(struct inode *inode)
handle_t *current_handle = ext4_journal_current_handle();
handle_t *handle;
if (!ext4_handle_valid(current_handle)) {
ext4_mark_inode_dirty(current_handle, inode);
return;
}
handle = ext4_journal_start(inode, 2);
if (IS_ERR(handle))
goto out;
@ -4880,8 +5022,9 @@ static int ext4_pin_inode(handle_t *handle, struct inode *inode)
BUFFER_TRACE(iloc.bh, "get_write_access");
err = jbd2_journal_get_write_access(handle, iloc.bh);
if (!err)
err = ext4_journal_dirty_metadata(handle,
iloc.bh);
err = ext4_handle_dirty_metadata(handle,
inode,
iloc.bh);
brelse(iloc.bh);
}
}
@ -4907,6 +5050,8 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
*/
journal = EXT4_JOURNAL(inode);
if (!journal)
return 0;
if (is_journal_aborted(journal))
return -EROFS;
@ -4936,7 +5081,7 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
return PTR_ERR(handle);
err = ext4_mark_inode_dirty(handle, inode);
handle->h_sync = 1;
ext4_handle_sync(handle);
ext4_journal_stop(handle);
ext4_std_error(inode->i_sb, err);

2
fs/ext4/ioctl.c
Просмотреть файл

@ -99,7 +99,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
goto flags_out;
}
if (IS_SYNC(inode))
handle->h_sync = 1;
ext4_handle_sync(handle);
err = ext4_reserve_inode_write(handle, inode, &iloc);
if (err)
goto flags_err;

629
fs/ext4/mballoc.c
Просмотреть файл

Разница между файлами не показана из-за своего большого размера Загрузить разницу

71
fs/ext4/mballoc.h
Просмотреть файл

@ -20,6 +20,7 @@
#include <linux/version.h>
#include <linux/blkdev.h>
#include <linux/marker.h>
#include <linux/mutex.h>
#include "ext4_jbd2.h"
#include "ext4.h"
#include "group.h"
@ -98,9 +99,6 @@
*/
#define MB_DEFAULT_GROUP_PREALLOC 512
static struct kmem_cache *ext4_pspace_cachep;
static struct kmem_cache *ext4_ac_cachep;
static struct kmem_cache *ext4_free_ext_cachep;
struct ext4_free_data {
/* this links the free block information from group_info */
@ -120,26 +118,6 @@ struct ext4_free_data {
tid_t t_tid;
};
struct ext4_group_info {
unsigned long bb_state;
struct rb_root bb_free_root;
unsigned short bb_first_free;
unsigned short bb_free;
unsigned short bb_fragments;
struct list_head bb_prealloc_list;
#ifdef DOUBLE_CHECK
void *bb_bitmap;
#endif
unsigned short bb_counters[];
};
#define EXT4_GROUP_INFO_NEED_INIT_BIT 0
#define EXT4_GROUP_INFO_LOCKED_BIT 1
#define EXT4_MB_GRP_NEED_INIT(grp) \
(test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state)))
struct ext4_prealloc_space {
struct list_head pa_inode_list;
struct list_head pa_group_list;
@ -217,6 +195,11 @@ struct ext4_allocation_context {
__u8 ac_op; /* operation, for history only */
struct page *ac_bitmap_page;
struct page *ac_buddy_page;
/*
* pointer to the held semaphore upon successful
* block allocation
*/
struct rw_semaphore *alloc_semp;
struct ext4_prealloc_space *ac_pa;
struct ext4_locality_group *ac_lg;
};
@ -250,6 +233,7 @@ struct ext4_buddy {
struct super_block *bd_sb;
__u16 bd_blkbits;
ext4_group_t bd_group;
struct rw_semaphore *alloc_semp;
};
#define EXT4_MB_BITMAP(e4b) ((e4b)->bd_bitmap)
#define EXT4_MB_BUDDY(e4b) ((e4b)->bd_buddy)
@ -259,51 +243,12 @@ static inline void ext4_mb_store_history(struct ext4_allocation_context *ac)
{
return;
}
#else
static void ext4_mb_store_history(struct ext4_allocation_context *ac);
#endif
#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
struct buffer_head *read_block_bitmap(struct super_block *, ext4_group_t);
static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap,
ext4_group_t group);
static void ext4_mb_return_to_preallocation(struct inode *inode,
struct ext4_buddy *e4b, sector_t block,
int count);
static void ext4_mb_put_pa(struct ext4_allocation_context *,
struct super_block *, struct ext4_prealloc_space *pa);
static int ext4_mb_init_per_dev_proc(struct super_block *sb);
static int ext4_mb_destroy_per_dev_proc(struct super_block *sb);
static void release_blocks_on_commit(journal_t *journal, transaction_t *txn);
static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group)
{
struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
bit_spin_lock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state));
}
static inline void ext4_unlock_group(struct super_block *sb,
ext4_group_t group)
{
struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
bit_spin_unlock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state));
}
static inline int ext4_is_group_locked(struct super_block *sb,
ext4_group_t group)
{
struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
return bit_spin_is_locked(EXT4_GROUP_INFO_LOCKED_BIT,
&(grinfo->bb_state));
}
static ext4_fsblk_t ext4_grp_offs_to_block(struct super_block *sb,
static inline ext4_fsblk_t ext4_grp_offs_to_block(struct super_block *sb,
struct ext4_free_extent *fex)
{
ext4_fsblk_t block;

19
fs/ext4/migrate.c
Просмотреть файл

@ -59,7 +59,8 @@ static int finish_range(handle_t *handle, struct inode *inode,
/*
* Make sure the credit we accumalated is not really high
*/
if (needed && handle->h_buffer_credits >= EXT4_RESERVE_TRANS_BLOCKS) {
if (needed && ext4_handle_has_enough_credits(handle,
EXT4_RESERVE_TRANS_BLOCKS)) {
retval = ext4_journal_restart(handle, needed);
if (retval)
goto err_out;
@ -229,7 +230,7 @@ static int extend_credit_for_blkdel(handle_t *handle, struct inode *inode)
{
int retval = 0, needed;
if (handle->h_buffer_credits > EXT4_RESERVE_TRANS_BLOCKS)
if (ext4_handle_has_enough_credits(handle, EXT4_RESERVE_TRANS_BLOCKS+1))
return 0;
/*
* We are freeing a blocks. During this we touch
@ -458,13 +459,13 @@ int ext4_ext_migrate(struct inode *inode)
struct list_blocks_struct lb;
unsigned long max_entries;
if (!test_opt(inode->i_sb, EXTENTS))
/*
* if mounted with noextents we don't allow the migrate
*/
return -EINVAL;
if ((EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
/*
* If the filesystem does not support extents, or the inode
* already is extent-based, error out.
*/
if (!EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_INCOMPAT_EXTENTS) ||
(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
return -EINVAL;
if (S_ISLNK(inode->i_mode) && inode->i_blocks == 0)

92
fs/ext4/namei.c
Просмотреть файл

@ -368,6 +368,8 @@ dx_probe(const struct qstr *d_name, struct inode *dir,
goto fail;
}
hinfo->hash_version = root->info.hash_version;
if (hinfo->hash_version <= DX_HASH_TEA)
hinfo->hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned;
hinfo->seed = EXT4_SB(dir->i_sb)->s_hash_seed;
if (d_name)
ext4fs_dirhash(d_name->name, d_name->len, hinfo);
@ -637,6 +639,9 @@ int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
dir = dir_file->f_path.dentry->d_inode;
if (!(EXT4_I(dir)->i_flags & EXT4_INDEX_FL)) {
hinfo.hash_version = EXT4_SB(dir->i_sb)->s_def_hash_version;
if (hinfo.hash_version <= DX_HASH_TEA)
hinfo.hash_version +=
EXT4_SB(dir->i_sb)->s_hash_unsigned;
hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed;
count = htree_dirblock_to_tree(dir_file, dir, 0, &hinfo,
start_hash, start_minor_hash);
@ -802,7 +807,7 @@ static inline int ext4_match (int len, const char * const name,
static inline int search_dirblock(struct buffer_head *bh,
struct inode *dir,
const struct qstr *d_name,
unsigned long offset,
unsigned int offset,
struct ext4_dir_entry_2 ** res_dir)
{
struct ext4_dir_entry_2 * de;
@ -1039,11 +1044,11 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, stru
bh = ext4_find_entry(dir, &dentry->d_name, &de);
inode = NULL;
if (bh) {
unsigned long ino = le32_to_cpu(de->inode);
__u32 ino = le32_to_cpu(de->inode);
brelse(bh);
if (!ext4_valid_inum(dir->i_sb, ino)) {
ext4_error(dir->i_sb, "ext4_lookup",
"bad inode number: %lu", ino);
"bad inode number: %u", ino);
return ERR_PTR(-EIO);
}
inode = ext4_iget(dir->i_sb, ino);
@ -1056,7 +1061,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, stru
struct dentry *ext4_get_parent(struct dentry *child)
{
unsigned long ino;
__u32 ino;
struct inode *inode;
static const struct qstr dotdot = {
.name = "..",
@ -1074,7 +1079,7 @@ struct dentry *ext4_get_parent(struct dentry *child)
if (!ext4_valid_inum(child->d_inode->i_sb, ino)) {
ext4_error(child->d_inode->i_sb, "ext4_get_parent",
"bad inode number: %lu", ino);
"bad inode number: %u", ino);
return ERR_PTR(-EIO);
}
@ -1162,9 +1167,9 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
u32 hash2;
struct dx_map_entry *map;
char *data1 = (*bh)->b_data, *data2;
unsigned split, move, size, i;
unsigned split, move, size;
struct ext4_dir_entry_2 *de = NULL, *de2;
int err = 0;
int err = 0, i;
bh2 = ext4_append (handle, dir, &newblock, &err);
if (!(bh2)) {
@ -1224,10 +1229,10 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
de = de2;
}
dx_insert_block(frame, hash2 + continued, newblock);
err = ext4_journal_dirty_metadata(handle, bh2);
err = ext4_handle_dirty_metadata(handle, dir, bh2);
if (err)
goto journal_error;
err = ext4_journal_dirty_metadata(handle, frame->bh);
err = ext4_handle_dirty_metadata(handle, dir, frame->bh);
if (err)
goto journal_error;
brelse(bh2);
@ -1262,7 +1267,7 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
struct inode *dir = dentry->d_parent->d_inode;
const char *name = dentry->d_name.name;
int namelen = dentry->d_name.len;
unsigned long offset = 0;
unsigned int offset = 0;
unsigned short reclen;
int nlen, rlen, err;
char *top;
@ -1331,8 +1336,8 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
ext4_update_dx_flag(dir);
dir->i_version++;
ext4_mark_inode_dirty(handle, dir);
BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
err = ext4_journal_dirty_metadata(handle, bh);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, dir, bh);
if (err)
ext4_std_error(dir->i_sb, err);
brelse(bh);
@ -1404,6 +1409,8 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
/* Initialize as for dx_probe */
hinfo.hash_version = root->info.hash_version;
if (hinfo.hash_version <= DX_HASH_TEA)
hinfo.hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned;
hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed;
ext4fs_dirhash(name, namelen, &hinfo);
frame = frames;
@ -1433,7 +1440,6 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
struct inode *inode)
{
struct inode *dir = dentry->d_parent->d_inode;
unsigned long offset;
struct buffer_head *bh;
struct ext4_dir_entry_2 *de;
struct super_block *sb;
@ -1455,7 +1461,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
ext4_mark_inode_dirty(handle, dir);
}
blocks = dir->i_size >> sb->s_blocksize_bits;
for (block = 0, offset = 0; block < blocks; block++) {
for (block = 0; block < blocks; block++) {
bh = ext4_bread(handle, dir, block, 0, &retval);
if(!bh)
return retval;
@ -1570,7 +1576,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
dxtrace(dx_show_index("node", frames[1].entries));
dxtrace(dx_show_index("node",
((struct dx_node *) bh2->b_data)->entries));
err = ext4_journal_dirty_metadata(handle, bh2);
err = ext4_handle_dirty_metadata(handle, inode, bh2);
if (err)
goto journal_error;
brelse (bh2);
@ -1596,7 +1602,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
if (err)
goto journal_error;
}
ext4_journal_dirty_metadata(handle, frames[0].bh);
ext4_handle_dirty_metadata(handle, inode, frames[0].bh);
}
de = do_split(handle, dir, &bh, frame, &hinfo, &err);
if (!de)
@ -1642,8 +1648,8 @@ static int ext4_delete_entry(handle_t *handle,
else
de->inode = 0;
dir->i_version++;
BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
ext4_journal_dirty_metadata(handle, bh);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
ext4_handle_dirty_metadata(handle, dir, bh);
return 0;
}
i += ext4_rec_len_from_disk(de->rec_len);
@ -1721,7 +1727,7 @@ retry:
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
handle->h_sync = 1;
ext4_handle_sync(handle);
inode = ext4_new_inode (handle, dir, mode);
err = PTR_ERR(inode);
@ -1755,7 +1761,7 @@ retry:
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
handle->h_sync = 1;
ext4_handle_sync(handle);
inode = ext4_new_inode(handle, dir, mode);
err = PTR_ERR(inode);
@ -1791,7 +1797,7 @@ retry:
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
handle->h_sync = 1;
ext4_handle_sync(handle);
inode = ext4_new_inode(handle, dir, S_IFDIR | mode);
err = PTR_ERR(inode);
@ -1820,8 +1826,8 @@ retry:
strcpy(de->name, "..");
ext4_set_de_type(dir->i_sb, de, S_IFDIR);
inode->i_nlink = 2;
BUFFER_TRACE(dir_block, "call ext4_journal_dirty_metadata");
ext4_journal_dirty_metadata(handle, dir_block);
BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
ext4_handle_dirty_metadata(handle, dir, dir_block);
brelse(dir_block);
ext4_mark_inode_dirty(handle, inode);
err = ext4_add_entry(handle, dentry, inode);
@ -1850,7 +1856,7 @@ out_stop:
*/
static int empty_dir(struct inode *inode)
{
unsigned long offset;
unsigned int offset;
struct buffer_head *bh;
struct ext4_dir_entry_2 *de, *de1;
struct super_block *sb;
@ -1895,7 +1901,7 @@ static int empty_dir(struct inode *inode)
if (err)
ext4_error(sb, __func__,
"error %d reading directory"
" #%lu offset %lu",
" #%lu offset %u",
err, inode->i_ino, offset);
offset += sb->s_blocksize;
continue;
@ -1933,6 +1939,9 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode)
struct ext4_iloc iloc;
int err = 0, rc;
if (!ext4_handle_valid(handle))
return 0;
lock_super(sb);
if (!list_empty(&EXT4_I(inode)->i_orphan))
goto out_unlock;
@ -1961,7 +1970,7 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode)
/* Insert this inode at the head of the on-disk orphan list... */
NEXT_ORPHAN(inode) = le32_to_cpu(EXT4_SB(sb)->s_es->s_last_orphan);
EXT4_SB(sb)->s_es->s_last_orphan = cpu_to_le32(inode->i_ino);
err = ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
err = ext4_handle_dirty_metadata(handle, inode, EXT4_SB(sb)->s_sbh);
rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
if (!err)
err = rc;
@ -1995,10 +2004,13 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
struct list_head *prev;
struct ext4_inode_info *ei = EXT4_I(inode);
struct ext4_sb_info *sbi;
unsigned long ino_next;
__u32 ino_next;
struct ext4_iloc iloc;
int err = 0;
if (!ext4_handle_valid(handle))
return 0;
lock_super(inode->i_sb);
if (list_empty(&ei->i_orphan)) {
unlock_super(inode->i_sb);
@ -2017,7 +2029,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
* transaction handle with which to update the orphan list on
* disk, but we still need to remove the inode from the linked
* list in memory. */
if (!handle)
if (sbi->s_journal && !handle)
goto out;
err = ext4_reserve_inode_write(handle, inode, &iloc);
@ -2025,19 +2037,19 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
goto out_err;
if (prev == &sbi->s_orphan) {
jbd_debug(4, "superblock will point to %lu\n", ino_next);
jbd_debug(4, "superblock will point to %u\n", ino_next);
BUFFER_TRACE(sbi->s_sbh, "get_write_access");
err = ext4_journal_get_write_access(handle, sbi->s_sbh);
if (err)
goto out_brelse;
sbi->s_es->s_last_orphan = cpu_to_le32(ino_next);
err = ext4_journal_dirty_metadata(handle, sbi->s_sbh);
err = ext4_handle_dirty_metadata(handle, inode, sbi->s_sbh);
} else {
struct ext4_iloc iloc2;
struct inode *i_prev =
&list_entry(prev, struct ext4_inode_info, i_orphan)->vfs_inode;
jbd_debug(4, "orphan inode %lu will point to %lu\n",
jbd_debug(4, "orphan inode %lu will point to %u\n",
i_prev->i_ino, ino_next);
err = ext4_reserve_inode_write(handle, i_prev, &iloc2);
if (err)
@ -2082,7 +2094,7 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
goto end_rmdir;
if (IS_DIRSYNC(dir))
handle->h_sync = 1;
ext4_handle_sync(handle);
inode = dentry->d_inode;
@ -2136,7 +2148,7 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
handle->h_sync = 1;
ext4_handle_sync(handle);
retval = -ENOENT;
bh = ext4_find_entry(dir, &dentry->d_name, &de);
@ -2193,7 +2205,7 @@ retry:
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
handle->h_sync = 1;
ext4_handle_sync(handle);
inode = ext4_new_inode(handle, dir, S_IFLNK|S_IRWXUGO);
err = PTR_ERR(inode);
@ -2256,7 +2268,7 @@ retry:
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
handle->h_sync = 1;
ext4_handle_sync(handle);
inode->i_ctime = ext4_current_time(inode);
ext4_inc_count(handle, inode);
@ -2305,7 +2317,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
return PTR_ERR(handle);
if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
handle->h_sync = 1;
ext4_handle_sync(handle);
old_bh = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de);
/*
@ -2359,8 +2371,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
new_dir->i_ctime = new_dir->i_mtime =
ext4_current_time(new_dir);
ext4_mark_inode_dirty(handle, new_dir);
BUFFER_TRACE(new_bh, "call ext4_journal_dirty_metadata");
ext4_journal_dirty_metadata(handle, new_bh);
BUFFER_TRACE(new_bh, "call ext4_handle_dirty_metadata");
ext4_handle_dirty_metadata(handle, new_dir, new_bh);
brelse(new_bh);
new_bh = NULL;
}
@ -2410,8 +2422,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
BUFFER_TRACE(dir_bh, "get_write_access");
ext4_journal_get_write_access(handle, dir_bh);
PARENT_INO(dir_bh->b_data) = cpu_to_le32(new_dir->i_ino);
BUFFER_TRACE(dir_bh, "call ext4_journal_dirty_metadata");
ext4_journal_dirty_metadata(handle, dir_bh);
BUFFER_TRACE(dir_bh, "call ext4_handle_dirty_metadata");
ext4_handle_dirty_metadata(handle, old_dir, dir_bh);
ext4_dec_count(handle, old_dir);
if (new_inode) {
/* checked empty_dir above, can't have another parent,

113
fs/ext4/resize.c
Просмотреть файл

@ -50,7 +50,7 @@ static int verify_group_input(struct super_block *sb,
ext4_get_group_no_and_offset(sb, start, NULL, &offset);
if (group != sbi->s_groups_count)
ext4_warning(sb, __func__,
"Cannot add at group %u (only %lu groups)",
"Cannot add at group %u (only %u groups)",
input->group, sbi->s_groups_count);
else if (offset != 0)
ext4_warning(sb, __func__, "Last group not full");
@ -149,7 +149,7 @@ static int extend_or_restart_transaction(handle_t *handle, int thresh,
{
int err;
if (handle->h_buffer_credits >= thresh)
if (ext4_handle_has_enough_credits(handle, thresh))
return 0;
err = ext4_journal_extend(handle, EXT4_MAX_TRANS_DATA);
@ -232,7 +232,7 @@ static int setup_new_group_blocks(struct super_block *sb,
memcpy(gdb->b_data, sbi->s_group_desc[i]->b_data, gdb->b_size);
set_buffer_uptodate(gdb);
unlock_buffer(gdb);
ext4_journal_dirty_metadata(handle, gdb);
ext4_handle_dirty_metadata(handle, NULL, gdb);
ext4_set_bit(bit, bh->b_data);
brelse(gdb);
}
@ -251,7 +251,7 @@ static int setup_new_group_blocks(struct super_block *sb,
err = PTR_ERR(bh);
goto exit_bh;
}
ext4_journal_dirty_metadata(handle, gdb);
ext4_handle_dirty_metadata(handle, NULL, gdb);
ext4_set_bit(bit, bh->b_data);
brelse(gdb);
}
@ -276,7 +276,7 @@ static int setup_new_group_blocks(struct super_block *sb,
err = PTR_ERR(it);
goto exit_bh;
}
ext4_journal_dirty_metadata(handle, it);
ext4_handle_dirty_metadata(handle, NULL, it);
brelse(it);
ext4_set_bit(bit, bh->b_data);
}
@ -284,11 +284,9 @@ static int setup_new_group_blocks(struct super_block *sb,
if ((err = extend_or_restart_transaction(handle, 2, bh)))
goto exit_bh;
mark_bitmap_end(input->blocks_count, EXT4_BLOCKS_PER_GROUP(sb),
bh->b_data);
ext4_journal_dirty_metadata(handle, bh);
mark_bitmap_end(input->blocks_count, sb->s_blocksize * 8, bh->b_data);
ext4_handle_dirty_metadata(handle, NULL, bh);
brelse(bh);
/* Mark unused entries in inode bitmap used */
ext4_debug("clear inode bitmap %#04llx (+%llu)\n",
input->inode_bitmap, input->inode_bitmap - start);
@ -297,9 +295,9 @@ static int setup_new_group_blocks(struct super_block *sb,
goto exit_journal;
}
mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), EXT4_BLOCKS_PER_GROUP(sb),
mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), sb->s_blocksize * 8,
bh->b_data);
ext4_journal_dirty_metadata(handle, bh);
ext4_handle_dirty_metadata(handle, NULL, bh);
exit_bh:
brelse(bh);
@ -486,12 +484,12 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
* reserved inode, and will become GDT blocks (primary and backup).
*/
data[gdb_num % EXT4_ADDR_PER_BLOCK(sb)] = 0;
ext4_journal_dirty_metadata(handle, dind);
ext4_handle_dirty_metadata(handle, NULL, dind);
brelse(dind);
inode->i_blocks -= (gdbackups + 1) * sb->s_blocksize >> 9;
ext4_mark_iloc_dirty(handle, inode, &iloc);
memset((*primary)->b_data, 0, sb->s_blocksize);
ext4_journal_dirty_metadata(handle, *primary);
ext4_handle_dirty_metadata(handle, NULL, *primary);
o_group_desc = EXT4_SB(sb)->s_group_desc;
memcpy(n_group_desc, o_group_desc,
@ -502,7 +500,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
kfree(o_group_desc);
le16_add_cpu(&es->s_reserved_gdt_blocks, -1);
ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh);
return 0;
@ -618,7 +616,7 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
primary[i]->b_blocknr, gdbackups,
blk + primary[i]->b_blocknr); */
data[gdbackups] = cpu_to_le32(blk + primary[i]->b_blocknr);
err2 = ext4_journal_dirty_metadata(handle, primary[i]);
err2 = ext4_handle_dirty_metadata(handle, NULL, primary[i]);
if (!err)
err = err2;
}
@ -676,7 +674,8 @@ static void update_backups(struct super_block *sb,
struct buffer_head *bh;
/* Out of journal space, and can't get more - abort - so sad */
if (handle->h_buffer_credits == 0 &&
if (ext4_handle_valid(handle) &&
handle->h_buffer_credits == 0 &&
ext4_journal_extend(handle, EXT4_MAX_TRANS_DATA) &&
(err = ext4_journal_restart(handle, EXT4_MAX_TRANS_DATA)))
break;
@ -696,7 +695,7 @@ static void update_backups(struct super_block *sb,
memset(bh->b_data + size, 0, rest);
set_buffer_uptodate(bh);
unlock_buffer(bh);
ext4_journal_dirty_metadata(handle, bh);
ext4_handle_dirty_metadata(handle, NULL, bh);
brelse(bh);
}
if ((err2 = ext4_journal_stop(handle)) && !err)
@ -715,7 +714,7 @@ static void update_backups(struct super_block *sb,
exit_err:
if (err) {
ext4_warning(sb, __func__,
"can't update backup for group %lu (err %d), "
"can't update backup for group %u (err %d), "
"forcing fsck on next reboot", group, err);
sbi->s_mount_state &= ~EXT4_VALID_FS;
sbi->s_es->s_state &= cpu_to_le16(~EXT4_VALID_FS);
@ -747,6 +746,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
struct inode *inode = NULL;
handle_t *handle;
int gdb_off, gdb_num;
int num_grp_locked = 0;
int err, err2;
gdb_num = input->group / EXT4_DESC_PER_BLOCK(sb);
@ -761,13 +761,13 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
if (ext4_blocks_count(es) + input->blocks_count <
ext4_blocks_count(es)) {
ext4_warning(sb, __func__, "blocks_count overflow\n");
ext4_warning(sb, __func__, "blocks_count overflow");
return -EINVAL;
}
if (le32_to_cpu(es->s_inodes_count) + EXT4_INODES_PER_GROUP(sb) <
le32_to_cpu(es->s_inodes_count)) {
ext4_warning(sb, __func__, "inodes_count overflow\n");
ext4_warning(sb, __func__, "inodes_count overflow");
return -EINVAL;
}
@ -787,6 +787,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
}
}
if ((err = verify_group_input(sb, input)))
goto exit_put;
@ -855,6 +856,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
* using the new disk blocks.
*/
num_grp_locked = ext4_mb_get_buddy_cache_lock(sb, input->group);
/* Update group descriptor block for new group */
gdp = (struct ext4_group_desc *)((char *)primary->b_data +
gdb_off * EXT4_DESC_SIZE(sb));
@ -862,17 +864,20 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
ext4_block_bitmap_set(sb, gdp, input->block_bitmap); /* LV FIXME */
ext4_inode_bitmap_set(sb, gdp, input->inode_bitmap); /* LV FIXME */
ext4_inode_table_set(sb, gdp, input->inode_table); /* LV FIXME */
gdp->bg_free_blocks_count = cpu_to_le16(input->free_blocks_count);
gdp->bg_free_inodes_count = cpu_to_le16(EXT4_INODES_PER_GROUP(sb));
ext4_free_blks_set(sb, gdp, input->free_blocks_count);
ext4_free_inodes_set(sb, gdp, EXT4_INODES_PER_GROUP(sb));
gdp->bg_flags |= cpu_to_le16(EXT4_BG_INODE_ZEROED);
gdp->bg_checksum = ext4_group_desc_csum(sbi, input->group, gdp);
/*
* We can allocate memory for mb_alloc based on the new group
* descriptor
*/
err = ext4_mb_add_more_groupinfo(sb, input->group, gdp);
if (err)
err = ext4_mb_add_groupinfo(sb, input->group, gdp);
if (err) {
ext4_mb_put_buddy_cache_lock(sb, input->group, num_grp_locked);
goto exit_journal;
}
/*
* Make the new blocks and inodes valid next. We do this before
@ -914,8 +919,9 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
/* Update the global fs size fields */
sbi->s_groups_count++;
ext4_mb_put_buddy_cache_lock(sb, input->group, num_grp_locked);
ext4_journal_dirty_metadata(handle, primary);
ext4_handle_dirty_metadata(handle, NULL, primary);
/* Update the reserved block counts only once the new group is
* active. */
@ -937,7 +943,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
EXT4_INODES_PER_GROUP(sb);
}
ext4_journal_dirty_metadata(handle, sbi->s_sbh);
ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh);
sb->s_dirt = 1;
exit_journal:
@ -975,9 +981,7 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es,
struct buffer_head *bh;
handle_t *handle;
int err;
unsigned long freed_blocks;
ext4_group_t group;
struct ext4_group_info *grp;
/* We don't need to worry about locking wrt other resizers just
* yet: we're going to revalidate es->s_blocks_count after
@ -997,8 +1001,7 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es,
" too large to resize to %llu blocks safely\n",
sb->s_id, n_blocks_count);
if (sizeof(sector_t) < 8)
ext4_warning(sb, __func__,
"CONFIG_LBD not enabled\n");
ext4_warning(sb, __func__, "CONFIG_LBD not enabled");
return -EINVAL;
}
@ -1071,62 +1074,18 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es,
goto exit_put;
}
ext4_blocks_count_set(es, o_blocks_count + add);
ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh);
sb->s_dirt = 1;
unlock_super(sb);
ext4_debug("freeing blocks %llu through %llu\n", o_blocks_count,
o_blocks_count + add);
ext4_free_blocks_sb(handle, sb, o_blocks_count, add, &freed_blocks);
/* We add the blocks to the bitmap and set the group need init bit */
ext4_add_groupblocks(handle, sb, o_blocks_count, add);
ext4_debug("freed blocks %llu through %llu\n", o_blocks_count,
o_blocks_count + add);
if ((err = ext4_journal_stop(handle)))
goto exit_put;
/*
* Mark mballoc pages as not up to date so that they will be updated
* next time they are loaded by ext4_mb_load_buddy.
*
* XXX Bad, Bad, BAD!!! We should not be overloading the
* Uptodate flag, particularly on thte bitmap bh, as way of
* hinting to ext4_mb_load_buddy() that it needs to be
* overloaded. A user could take a LVM snapshot, then do an
* on-line fsck, and clear the uptodate flag, and this would
* not be a bug in userspace, but a bug in the kernel. FIXME!!!
*/
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct inode *inode = sbi->s_buddy_cache;
int blocks_per_page;
int block;
int pnum;
struct page *page;
/* Set buddy page as not up to date */
blocks_per_page = PAGE_CACHE_SIZE / sb->s_blocksize;
block = group * 2;
pnum = block / blocks_per_page;
page = find_get_page(inode->i_mapping, pnum);
if (page != NULL) {
ClearPageUptodate(page);
page_cache_release(page);
}
/* Set bitmap page as not up to date */
block++;
pnum = block / blocks_per_page;
page = find_get_page(inode->i_mapping, pnum);
if (page != NULL) {
ClearPageUptodate(page);
page_cache_release(page);
}
/* Get the info on the last group */
grp = ext4_get_group_info(sb, group);
/* Update free blocks in group info */
ext4_mb_update_group_info(grp, add);
}
if (test_opt(sb, DEBUG))
printk(KERN_DEBUG "EXT4-fs: extended group to %llu blocks\n",
ext4_blocks_count(es));

622
fs/ext4/super.c
Просмотреть файл

Разница между файлами не показана из-за своего большого размера Загрузить разницу

25
fs/ext4/xattr.c
Просмотреть файл

@ -457,7 +457,7 @@ static void ext4_xattr_update_super_block(handle_t *handle,
if (ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh) == 0) {
EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_EXT_ATTR);
sb->s_dirt = 1;
ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh);
}
}
@ -487,9 +487,9 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode,
ext4_forget(handle, 1, inode, bh, bh->b_blocknr);
} else {
le32_add_cpu(&BHDR(bh)->h_refcount, -1);
error = ext4_journal_dirty_metadata(handle, bh);
error = ext4_handle_dirty_metadata(handle, inode, bh);
if (IS_SYNC(inode))
handle->h_sync = 1;
ext4_handle_sync(handle);
DQUOT_FREE_BLOCK(inode, 1);
ea_bdebug(bh, "refcount now=%d; releasing",
le32_to_cpu(BHDR(bh)->h_refcount));
@ -724,8 +724,9 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
if (error == -EIO)
goto bad_block;
if (!error)
error = ext4_journal_dirty_metadata(handle,
bs->bh);
error = ext4_handle_dirty_metadata(handle,
inode,
bs->bh);
if (error)
goto cleanup;
goto inserted;
@ -794,8 +795,9 @@ inserted:
ea_bdebug(new_bh, "reusing; refcount now=%d",
le32_to_cpu(BHDR(new_bh)->h_refcount));
unlock_buffer(new_bh);
error = ext4_journal_dirty_metadata(handle,
new_bh);
error = ext4_handle_dirty_metadata(handle,
inode,
new_bh);
if (error)
goto cleanup_dquot;
}
@ -810,8 +812,8 @@ inserted:
/* We need to allocate a new block */
ext4_fsblk_t goal = ext4_group_first_block_no(sb,
EXT4_I(inode)->i_block_group);
ext4_fsblk_t block = ext4_new_meta_block(handle, inode,
goal, &error);
ext4_fsblk_t block = ext4_new_meta_blocks(handle, inode,
goal, NULL, &error);
if (error)
goto cleanup;
ea_idebug(inode, "creating block %d", block);
@ -833,7 +835,8 @@ getblk_failed:
set_buffer_uptodate(new_bh);
unlock_buffer(new_bh);
ext4_xattr_cache_insert(new_bh);
error = ext4_journal_dirty_metadata(handle, new_bh);
error = ext4_handle_dirty_metadata(handle,
inode, new_bh);
if (error)
goto cleanup;
}
@ -1040,7 +1043,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
*/
is.iloc.bh = NULL;
if (IS_SYNC(inode))
handle->h_sync = 1;
ext4_handle_sync(handle);
}
cleanup:

3
fs/ioprio.c
Просмотреть файл

@ -27,7 +27,7 @@
#include <linux/security.h>
#include <linux/pid_namespace.h>
static int set_task_ioprio(struct task_struct *task, int ioprio)
int set_task_ioprio(struct task_struct *task, int ioprio)
{
int err;
struct io_context *ioc;
@ -70,6 +70,7 @@ static int set_task_ioprio(struct task_struct *task, int ioprio)
task_unlock(task);
return err;
}
EXPORT_SYMBOL_GPL(set_task_ioprio);
asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
{

24
fs/jbd2/checkpoint.c
Просмотреть файл

@ -249,16 +249,14 @@ restart:
return ret;
}
#define NR_BATCH 64
static void
__flush_batch(journal_t *journal, struct buffer_head **bhs, int *batch_count)
__flush_batch(journal_t *journal, int *batch_count)
{
int i;
ll_rw_block(SWRITE, *batch_count, bhs);
ll_rw_block(SWRITE, *batch_count, journal->j_chkpt_bhs);
for (i = 0; i < *batch_count; i++) {
struct buffer_head *bh = bhs[i];
struct buffer_head *bh = journal->j_chkpt_bhs[i];
clear_buffer_jwrite(bh);
BUFFER_TRACE(bh, "brelse");
__brelse(bh);
@ -277,8 +275,7 @@ __flush_batch(journal_t *journal, struct buffer_head **bhs, int *batch_count)
* Called under jbd_lock_bh_state(jh2bh(jh)), and drops it
*/
static int __process_buffer(journal_t *journal, struct journal_head *jh,
struct buffer_head **bhs, int *batch_count,
transaction_t *transaction)
int *batch_count, transaction_t *transaction)
{
struct buffer_head *bh = jh2bh(jh);
int ret = 0;
@ -325,14 +322,14 @@ static int __process_buffer(journal_t *journal, struct journal_head *jh,
get_bh(bh);
J_ASSERT_BH(bh, !buffer_jwrite(bh));
set_buffer_jwrite(bh);
bhs[*batch_count] = bh;
journal->j_chkpt_bhs[*batch_count] = bh;
__buffer_relink_io(jh);
jbd_unlock_bh_state(bh);
transaction->t_chp_stats.cs_written++;
(*batch_count)++;
if (*batch_count == NR_BATCH) {
if (*batch_count == JBD2_NR_BATCH) {
spin_unlock(&journal->j_list_lock);
__flush_batch(journal, bhs, batch_count);
__flush_batch(journal, batch_count);
ret = 1;
}
}
@ -388,7 +385,6 @@ restart:
if (journal->j_checkpoint_transactions == transaction &&
transaction->t_tid == this_tid) {
int batch_count = 0;
struct buffer_head *bhs[NR_BATCH];
struct journal_head *jh;
int retry = 0, err;
@ -402,7 +398,7 @@ restart:
retry = 1;
break;
}
retry = __process_buffer(journal, jh, bhs, &batch_count,
retry = __process_buffer(journal, jh, &batch_count,
transaction);
if (retry < 0 && !result)
result = retry;
@ -419,7 +415,7 @@ restart:
spin_unlock(&journal->j_list_lock);
retry = 1;
}
__flush_batch(journal, bhs, &batch_count);
__flush_batch(journal, &batch_count);
}
if (retry) {
@ -686,6 +682,7 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh)
safely remove this transaction from the log */
__jbd2_journal_drop_transaction(journal, transaction);
kfree(transaction);
/* Just in case anybody was waiting for more transactions to be
checkpointed... */
@ -760,5 +757,4 @@ void __jbd2_journal_drop_transaction(journal_t *journal, transaction_t *transact
J_ASSERT(journal->j_running_transaction != transaction);
jbd_debug(1, "Dropping transaction %d, all done\n", transaction->t_tid);
kfree(transaction);
}

58
fs/jbd2/commit.c
Просмотреть файл

@ -25,6 +25,7 @@
#include <linux/crc32.h>
#include <linux/writeback.h>
#include <linux/backing-dev.h>
#include <linux/bio.h>
/*
* Default IO end handler for temporary BJ_IO buffer_heads.
@ -137,7 +138,7 @@ static int journal_submit_commit_record(journal_t *journal,
set_buffer_ordered(bh);
barrier_done = 1;
}
ret = submit_bh(WRITE, bh);
ret = submit_bh(WRITE_SYNC, bh);
if (barrier_done)
clear_buffer_ordered(bh);
@ -158,7 +159,7 @@ static int journal_submit_commit_record(journal_t *journal,
lock_buffer(bh);
set_buffer_uptodate(bh);
clear_buffer_dirty(bh);
ret = submit_bh(WRITE, bh);
ret = submit_bh(WRITE_SYNC, bh);
}
*cbh = bh;
return ret;
@ -168,12 +169,34 @@ static int journal_submit_commit_record(journal_t *journal,
* This function along with journal_submit_commit_record
* allows to write the commit record asynchronously.
*/
static int journal_wait_on_commit_record(struct buffer_head *bh)
static int journal_wait_on_commit_record(journal_t *journal,
struct buffer_head *bh)
{
int ret = 0;
retry:
clear_buffer_dirty(bh);
wait_on_buffer(bh);
if (buffer_eopnotsupp(bh) && (journal->j_flags & JBD2_BARRIER)) {
printk(KERN_WARNING
"JBD2: wait_on_commit_record: sync failed on %s - "
"disabling barriers\n", journal->j_devname);
spin_lock(&journal->j_state_lock);
journal->j_flags &= ~JBD2_BARRIER;
spin_unlock(&journal->j_state_lock);
lock_buffer(bh);
clear_buffer_dirty(bh);
set_buffer_uptodate(bh);
bh->b_end_io = journal_end_buffer_io_sync;
ret = submit_bh(WRITE_SYNC, bh);
if (ret) {
unlock_buffer(bh);
return ret;
}
goto retry;
}
if (unlikely(!buffer_uptodate(bh)))
ret = -EIO;
@ -332,13 +355,15 @@ void jbd2_journal_commit_transaction(journal_t *journal)
int flags;
int err;
unsigned long long blocknr;
ktime_t start_time;
u64 commit_time;
char *tagp = NULL;
journal_header_t *header;
journal_block_tag_t *tag = NULL;
int space_left = 0;
int first_tag = 0;
int tag_flag;
int i;
int i, to_free = 0;
int tag_bytes = journal_tag_bytes(journal);
struct buffer_head *cbh = NULL; /* For transactional checksums */
__u32 crc32_sum = ~0;
@ -458,6 +483,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
commit_transaction->t_state = T_FLUSH;
journal->j_committing_transaction = commit_transaction;
journal->j_running_transaction = NULL;
start_time = ktime_get();
commit_transaction->t_log_start = journal->j_head;
wake_up(&journal->j_wait_transaction_locked);
spin_unlock(&journal->j_state_lock);
@ -803,7 +829,7 @@ wait_for_iobuf:
__jbd2_journal_abort_hard(journal);
}
if (!err && !is_journal_aborted(journal))
err = journal_wait_on_commit_record(cbh);
err = journal_wait_on_commit_record(journal, cbh);
if (err)
jbd2_journal_abort(journal, err);
@ -981,14 +1007,23 @@ restart_loop:
J_ASSERT(commit_transaction == journal->j_committing_transaction);
journal->j_commit_sequence = commit_transaction->t_tid;
journal->j_committing_transaction = NULL;
spin_unlock(&journal->j_state_lock);
commit_time = ktime_to_ns(ktime_sub(ktime_get(), start_time));
if (journal->j_commit_callback)
journal->j_commit_callback(journal, commit_transaction);
/*
* weight the commit time higher than the average time so we don't
* react too strongly to vast changes in the commit time
*/
if (likely(journal->j_average_commit_time))
journal->j_average_commit_time = (commit_time +
journal->j_average_commit_time*3) / 4;
else
journal->j_average_commit_time = commit_time;
spin_unlock(&journal->j_state_lock);
if (commit_transaction->t_checkpoint_list == NULL &&
commit_transaction->t_checkpoint_io_list == NULL) {
__jbd2_journal_drop_transaction(journal, commit_transaction);
to_free = 1;
} else {
if (journal->j_checkpoint_transactions == NULL) {
journal->j_checkpoint_transactions = commit_transaction;
@ -1007,11 +1042,16 @@ restart_loop:
}
spin_unlock(&journal->j_list_lock);
if (journal->j_commit_callback)
journal->j_commit_callback(journal, commit_transaction);
trace_mark(jbd2_end_commit, "dev %s transaction %d head %d",
journal->j_devname, journal->j_commit_sequence,
journal->j_devname, commit_transaction->t_tid,
journal->j_tail_sequence);
jbd_debug(1, "JBD: commit %d complete, head %d\n",
journal->j_commit_sequence, journal->j_tail_sequence);
if (to_free)
kfree(commit_transaction);
wake_up(&journal->j_wait_done_commit);
}

124
fs/jbd2/journal.c
Просмотреть файл

@ -40,6 +40,7 @@
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/div64.h>
EXPORT_SYMBOL(jbd2_journal_start);
EXPORT_SYMBOL(jbd2_journal_restart);
@ -66,7 +67,6 @@ EXPORT_SYMBOL(jbd2_journal_update_format);
EXPORT_SYMBOL(jbd2_journal_check_used_features);
EXPORT_SYMBOL(jbd2_journal_check_available_features);
EXPORT_SYMBOL(jbd2_journal_set_features);
EXPORT_SYMBOL(jbd2_journal_create);
EXPORT_SYMBOL(jbd2_journal_load);
EXPORT_SYMBOL(jbd2_journal_destroy);
EXPORT_SYMBOL(jbd2_journal_abort);
@ -132,8 +132,9 @@ static int kjournald2(void *arg)
journal->j_task = current;
wake_up(&journal->j_wait_done_commit);
printk(KERN_INFO "kjournald2 starting. Commit interval %ld seconds\n",
journal->j_commit_interval / HZ);
printk(KERN_INFO "kjournald2 starting: pid %d, dev %s, "
"commit interval %ld seconds\n", current->pid,
journal->j_devname, journal->j_commit_interval / HZ);
/*
* And now, wait forever for commit wakeup events.
@ -650,6 +651,8 @@ struct journal_head *jbd2_journal_get_descriptor_buffer(journal_t *journal)
return NULL;
bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
if (!bh)
return NULL;
lock_buffer(bh);
memset(bh->b_data, 0, journal->j_blocksize);
set_buffer_uptodate(bh);
@ -843,6 +846,8 @@ static int jbd2_seq_info_show(struct seq_file *seq, void *v)
jiffies_to_msecs(s->stats->u.run.rs_flushing / s->stats->ts_tid));
seq_printf(seq, " %ums logging transaction\n",
jiffies_to_msecs(s->stats->u.run.rs_logging / s->stats->ts_tid));
seq_printf(seq, " %luus average transaction commit time\n",
do_div(s->journal->j_average_commit_time, 1000));
seq_printf(seq, " %lu handles per transaction\n",
s->stats->u.run.rs_handle_count / s->stats->ts_tid);
seq_printf(seq, " %lu blocks per transaction\n",
@ -980,6 +985,8 @@ static journal_t * journal_init_common (void)
spin_lock_init(&journal->j_state_lock);
journal->j_commit_interval = (HZ * JBD2_DEFAULT_MAX_COMMIT_AGE);
journal->j_min_batch_time = 0;
journal->j_max_batch_time = 15000; /* 15ms */
/* The journal is marked for error until we succeed with recovery! */
journal->j_flags = JBD2_ABORT;
@ -1035,15 +1042,14 @@ journal_t * jbd2_journal_init_dev(struct block_device *bdev,
/* journal descriptor can store up to n blocks -bzzz */
journal->j_blocksize = blocksize;
jbd2_stats_proc_init(journal);
n = journal->j_blocksize / sizeof(journal_block_tag_t);
journal->j_wbufsize = n;
journal->j_wbuf = kmalloc(n * sizeof(struct buffer_head*), GFP_KERNEL);
if (!journal->j_wbuf) {
printk(KERN_ERR "%s: Cant allocate bhs for commit thread\n",
__func__);
kfree(journal);
journal = NULL;
goto out;
goto out_err;
}
journal->j_dev = bdev;
journal->j_fs_dev = fs_dev;
@ -1053,14 +1059,22 @@ journal_t * jbd2_journal_init_dev(struct block_device *bdev,
p = journal->j_devname;
while ((p = strchr(p, '/')))
*p = '!';
jbd2_stats_proc_init(journal);
bh = __getblk(journal->j_dev, start, journal->j_blocksize);
J_ASSERT(bh != NULL);
if (!bh) {
printk(KERN_ERR
"%s: Cannot get buffer for journal superblock\n",
__func__);
goto out_err;
}
journal->j_sb_buffer = bh;
journal->j_superblock = (journal_superblock_t *)bh->b_data;
out:
return journal;
out_err:
jbd2_stats_proc_exit(journal);
kfree(journal);
return NULL;
}
/**
@ -1108,9 +1122,7 @@ journal_t * jbd2_journal_init_inode (struct inode *inode)
if (!journal->j_wbuf) {
printk(KERN_ERR "%s: Cant allocate bhs for commit thread\n",
__func__);
jbd2_stats_proc_exit(journal);
kfree(journal);
return NULL;
goto out_err;
}
err = jbd2_journal_bmap(journal, 0, &blocknr);
@ -1118,17 +1130,24 @@ journal_t * jbd2_journal_init_inode (struct inode *inode)
if (err) {
printk(KERN_ERR "%s: Cannnot locate journal superblock\n",
__func__);
jbd2_stats_proc_exit(journal);
kfree(journal);
return NULL;
goto out_err;
}
bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
J_ASSERT(bh != NULL);
if (!bh) {
printk(KERN_ERR
"%s: Cannot get buffer for journal superblock\n",
__func__);
goto out_err;
}
journal->j_sb_buffer = bh;
journal->j_superblock = (journal_superblock_t *)bh->b_data;
return journal;
out_err:
jbd2_stats_proc_exit(journal);
kfree(journal);
return NULL;
}
/*
@ -1176,77 +1195,6 @@ static int journal_reset(journal_t *journal)
return jbd2_journal_start_thread(journal);
}
/**
* int jbd2_journal_create() - Initialise the new journal file
* @journal: Journal to create. This structure must have been initialised
*
* Given a journal_t structure which tells us which disk blocks we can
* use, create a new journal superblock and initialise all of the
* journal fields from scratch.
**/
int jbd2_journal_create(journal_t *journal)
{
unsigned long long blocknr;
struct buffer_head *bh;
journal_superblock_t *sb;
int i, err;
if (journal->j_maxlen < JBD2_MIN_JOURNAL_BLOCKS) {
printk (KERN_ERR "Journal length (%d blocks) too short.\n",
journal->j_maxlen);
journal_fail_superblock(journal);
return -EINVAL;
}
if (journal->j_inode == NULL) {
/*
* We don't know what block to start at!
*/
printk(KERN_EMERG
"%s: creation of journal on external device!\n",
__func__);
BUG();
}
/* Zero out the entire journal on disk. We cannot afford to
have any blocks on disk beginning with JBD2_MAGIC_NUMBER. */
jbd_debug(1, "JBD: Zeroing out journal blocks...\n");
for (i = 0; i < journal->j_maxlen; i++) {
err = jbd2_journal_bmap(journal, i, &blocknr);
if (err)
return err;
bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
lock_buffer(bh);
memset (bh->b_data, 0, journal->j_blocksize);
BUFFER_TRACE(bh, "marking dirty");
mark_buffer_dirty(bh);
BUFFER_TRACE(bh, "marking uptodate");
set_buffer_uptodate(bh);
unlock_buffer(bh);
__brelse(bh);
}
sync_blockdev(journal->j_dev);
jbd_debug(1, "JBD: journal cleared.\n");
/* OK, fill in the initial static fields in the new superblock */
sb = journal->j_superblock;
sb->s_header.h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER);
sb->s_header.h_blocktype = cpu_to_be32(JBD2_SUPERBLOCK_V2);
sb->s_blocksize = cpu_to_be32(journal->j_blocksize);
sb->s_maxlen = cpu_to_be32(journal->j_maxlen);
sb->s_first = cpu_to_be32(1);
journal->j_transaction_sequence = 1;
journal->j_flags &= ~JBD2_ABORT;
journal->j_format_version = 2;
return journal_reset(journal);
}
/**
* void jbd2_journal_update_superblock() - Update journal sb on disk.
* @journal: The journal to update.
@ -1491,7 +1439,9 @@ int jbd2_journal_destroy(journal_t *journal)
spin_lock(&journal->j_list_lock);
while (journal->j_checkpoint_transactions != NULL) {
spin_unlock(&journal->j_list_lock);
mutex_lock(&journal->j_checkpoint_mutex);
jbd2_log_do_checkpoint(journal);
mutex_unlock(&journal->j_checkpoint_mutex);
spin_lock(&journal->j_list_lock);
}

60
fs/jbd2/transaction.c
Просмотреть файл

@ -25,6 +25,7 @@
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/hrtimer.h>
static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh);
@ -48,6 +49,7 @@ jbd2_get_transaction(journal_t *journal, transaction_t *transaction)
{
transaction->t_journal = journal;
transaction->t_state = T_RUNNING;
transaction->t_start_time = ktime_get();
transaction->t_tid = journal->j_transaction_sequence++;
transaction->t_expires = jiffies + journal->j_commit_interval;
spin_lock_init(&transaction->t_handle_lock);
@ -1240,7 +1242,7 @@ int jbd2_journal_stop(handle_t *handle)
{
transaction_t *transaction = handle->h_transaction;
journal_t *journal = transaction->t_journal;
int old_handle_count, err;
int err;
pid_t pid;
J_ASSERT(journal_current_handle() == handle);
@ -1263,24 +1265,54 @@ int jbd2_journal_stop(handle_t *handle)
/*
* Implement synchronous transaction batching. If the handle
* was synchronous, don't force a commit immediately. Let's
* yield and let another thread piggyback onto this transaction.
* Keep doing that while new threads continue to arrive.
* It doesn't cost much - we're about to run a commit and sleep
* on IO anyway. Speeds up many-threaded, many-dir operations
* by 30x or more...
* yield and let another thread piggyback onto this
* transaction. Keep doing that while new threads continue to
* arrive. It doesn't cost much - we're about to run a commit
* and sleep on IO anyway. Speeds up many-threaded, many-dir
* operations by 30x or more...
*
* But don't do this if this process was the most recent one to
* perform a synchronous write. We do this to detect the case where a
* single process is doing a stream of sync writes. No point in waiting
* for joiners in that case.
* We try and optimize the sleep time against what the
* underlying disk can do, instead of having a static sleep
* time. This is useful for the case where our storage is so
* fast that it is more optimal to go ahead and force a flush
* and wait for the transaction to be committed than it is to
* wait for an arbitrary amount of time for new writers to
* join the transaction. We achieve this by measuring how
* long it takes to commit a transaction, and compare it with
* how long this transaction has been running, and if run time
* < commit time then we sleep for the delta and commit. This
* greatly helps super fast disks that would see slowdowns as
* more threads started doing fsyncs.
*
* But don't do this if this process was the most recent one
* to perform a synchronous write. We do this to detect the
* case where a single process is doing a stream of sync
* writes. No point in waiting for joiners in that case.
*/
pid = current->pid;
if (handle->h_sync && journal->j_last_sync_writer != pid) {
u64 commit_time, trans_time;
journal->j_last_sync_writer = pid;
do {
old_handle_count = transaction->t_handle_count;
schedule_timeout_uninterruptible(1);
} while (old_handle_count != transaction->t_handle_count);
spin_lock(&journal->j_state_lock);
commit_time = journal->j_average_commit_time;
spin_unlock(&journal->j_state_lock);
trans_time = ktime_to_ns(ktime_sub(ktime_get(),
transaction->t_start_time));
commit_time = max_t(u64, commit_time,
1000*journal->j_min_batch_time);
commit_time = min_t(u64, commit_time,
1000*journal->j_max_batch_time);
if (trans_time < commit_time) {
ktime_t expires = ktime_add_ns(ktime_get(),
commit_time);
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_hrtimeout(&expires, HRTIMER_MODE_ABS);
}
}
current->journal_info = NULL;

2
fs/super.c
Просмотреть файл

@ -810,6 +810,7 @@ int get_sb_bdev(struct file_system_type *fs_type,
}
s->s_flags |= MS_ACTIVE;
bdev->bd_super = s;
}
return simple_set_mnt(mnt, s);
@ -829,6 +830,7 @@ void kill_block_super(struct super_block *sb)
struct block_device *bdev = sb->s_bdev;
fmode_t mode = sb->s_mode;
bdev->bd_super = 0;
generic_shutdown_super(sb);
sync_blockdev(bdev);
close_bdev_exclusive(bdev, mode);

28
include/linux/ext3_fs.h
Просмотреть файл

@ -377,6 +377,13 @@ struct ext3_inode {
#define EXT3_ERROR_FS 0x0002 /* Errors detected */
#define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
/*
* Misc. filesystem flags
*/
#define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */
#define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */
#define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */
/*
* Mount flags
*/
@ -513,7 +520,23 @@ struct ext3_super_block {
__u16 s_reserved_word_pad;
__le32 s_default_mount_opts;
__le32 s_first_meta_bg; /* First metablock block group */
__u32 s_reserved[190]; /* Padding to the end of the block */
__le32 s_mkfs_time; /* When the filesystem was created */
__le32 s_jnl_blocks[17]; /* Backup of the journal inode */
/* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
/*150*/ __le32 s_blocks_count_hi; /* Blocks count */
__le32 s_r_blocks_count_hi; /* Reserved blocks count */
__le32 s_free_blocks_count_hi; /* Free blocks count */
__le16 s_min_extra_isize; /* All inodes have at least # bytes */
__le16 s_want_extra_isize; /* New inodes should reserve # bytes */
__le32 s_flags; /* Miscellaneous flags */
__le16 s_raid_stride; /* RAID stride */
__le16 s_mmp_interval; /* # seconds to wait in MMP checking */
__le64 s_mmp_block; /* Block for multi-mount protection */
__le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/
__u8 s_log_groups_per_flex; /* FLEX_BG group size */
__u8 s_reserved_char_pad2;
__le16 s_reserved_pad;
__u32 s_reserved[162]; /* Padding to the end of the block */
};
#ifdef __KERNEL__
@ -718,6 +741,9 @@ static inline __le16 ext3_rec_len_to_disk(unsigned len)
#define DX_HASH_LEGACY 0
#define DX_HASH_HALF_MD4 1
#define DX_HASH_TEA 2
#define DX_HASH_LEGACY_UNSIGNED 3
#define DX_HASH_HALF_MD4_UNSIGNED 4
#define DX_HASH_TEA_UNSIGNED 5
#ifdef __KERNEL__

1
include/linux/ext3_fs_sb.h
Просмотреть файл

@ -57,6 +57,7 @@ struct ext3_sb_info {
u32 s_next_generation;
u32 s_hash_seed[4];
int s_def_hash_version;
int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */
struct percpu_counter s_freeblocks_counter;
struct percpu_counter s_freeinodes_counter;
struct percpu_counter s_dirs_counter;

2
include/linux/fs.h
Просмотреть файл

@ -565,6 +565,7 @@ struct address_space {
struct block_device {
dev_t bd_dev; /* not a kdev_t - it's a search key */
struct inode * bd_inode; /* will die */
struct super_block * bd_super;
int bd_openers;
struct mutex bd_mutex; /* open/close mutex */
struct semaphore bd_mount_sem;
@ -1389,6 +1390,7 @@ struct super_operations {
ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
#endif
int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);
};
/*

2
include/linux/ioprio.h
Просмотреть файл

@ -86,4 +86,6 @@ static inline int task_nice_ioclass(struct task_struct *task)
*/
extern int ioprio_best(unsigned short aprio, unsigned short bprio);
extern int set_task_ioprio(struct task_struct *task, int ioprio);
#endif

38
include/linux/jbd2.h
Просмотреть файл

@ -637,6 +637,11 @@ struct transaction_s
*/
unsigned long t_expires;
/*
* When this transaction started, in nanoseconds [no locking]
*/
ktime_t t_start_time;
/*
* How many handles used this transaction? [t_handle_lock]
*/
@ -682,6 +687,8 @@ jbd2_time_diff(unsigned long start, unsigned long end)
return end + (MAX_JIFFY_OFFSET - start);
}
#define JBD2_NR_BATCH 64
/**
* struct journal_s - The journal_s type is the concrete type associated with
* journal_t.
@ -825,6 +832,14 @@ struct journal_s
/* Semaphore for locking against concurrent checkpoints */
struct mutex j_checkpoint_mutex;
/*
* List of buffer heads used by the checkpoint routine. This
* was moved from jbd2_log_do_checkpoint() to reduce stack
* usage. Access to this array is controlled by the
* j_checkpoint_mutex. [j_checkpoint_mutex]
*/
struct buffer_head *j_chkpt_bhs[JBD2_NR_BATCH];
/*
* Journal head: identifies the first unused block in the journal.
* [j_state_lock]
@ -939,8 +954,26 @@ struct journal_s
struct buffer_head **j_wbuf;
int j_wbufsize;
/*
* this is the pid of hte last person to run a synchronous operation
* through the journal
*/
pid_t j_last_sync_writer;
/*
* the average amount of time in nanoseconds it takes to commit a
* transaction to disk. [j_state_lock]
*/
u64 j_average_commit_time;
/*
* minimum and maximum times that we should wait for
* additional filesystem operations to get batched into a
* synchronous handle in microseconds
*/
u32 j_min_batch_time;
u32 j_max_batch_time;
/* This function is called when a transaction is closed */
void (*j_commit_callback)(journal_t *,
transaction_t *);
@ -1102,7 +1135,6 @@ extern int jbd2_journal_set_features
(journal_t *, unsigned long, unsigned long, unsigned long);
extern void jbd2_journal_clear_features
(journal_t *, unsigned long, unsigned long, unsigned long);
extern int jbd2_journal_create (journal_t *);
extern int jbd2_journal_load (journal_t *journal);
extern int jbd2_journal_destroy (journal_t *);
extern int jbd2_journal_recover (journal_t *journal);
@ -1177,8 +1209,8 @@ int jbd2_log_wait_commit(journal_t *journal, tid_t tid);
int jbd2_log_do_checkpoint(journal_t *journal);
void __jbd2_log_wait_for_space(journal_t *journal);
extern void __jbd2_journal_drop_transaction(journal_t *, transaction_t *);
extern int jbd2_cleanup_journal_tail(journal_t *);
extern void __jbd2_journal_drop_transaction(journal_t *, transaction_t *);
extern int jbd2_cleanup_journal_tail(journal_t *);
/* Debugging code only: */