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A large number of cleanups and bug fixes, with some (minor) journal

Browse Source 
optimizations.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 updates from Ted Ts'o:
 "A large number of cleanups and bug fixes, with some (minor) journal
  optimizations"

[ This got sent to me before -rc1, but was stuck in my spam folder.   - Linus ]

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (67 commits)
  ext4: check s_chksum_driver when looking for bg csum presence
  ext4: move error report out of atomic context in ext4_init_block_bitmap()
  ext4: Replace open coded mdata csum feature to helper function
  ext4: delete useless comments about ext4_move_extents
  ext4: fix reservation overflow in ext4_da_write_begin
  ext4: add ext4_iget_normal() which is to be used for dir tree lookups
  ext4: don't orphan or truncate the boot loader inode
  ext4: grab missed write_count for EXT4_IOC_SWAP_BOOT
  ext4: optimize block allocation on grow indepth
  ext4: get rid of code duplication
  ext4: fix over-defensive complaint after journal abort
  ext4: fix return value of ext4_do_update_inode
  ext4: fix mmap data corruption when blocksize < pagesize
  vfs: fix data corruption when blocksize < pagesize for mmaped data
  ext4: fold ext4_nojournal_sops into ext4_sops
  ext4: support freezing ext2 (nojournal) file systems
  ext4: fold ext4_sync_fs_nojournal() into ext4_sync_fs()
  ext4: don't check quota format when there are no quota files
  jbd2: simplify calling convention around __jbd2_journal_clean_checkpoint_list
  jbd2: avoid pointless scanning of checkpoint lists
  ...
This commit is contained in:
Linus Torvalds 2014-10-20 09:50:11 -07:00
commit c2661b8060
33 changed files with 1490 additions and 1885 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
fs/buffer.c
View File

@ -993,7 +993,7 @@ init_page_buffers(struct page *page, struct block_device *bdev,
*/
static int
grow_dev_page(struct block_device *bdev, sector_t block,
pgoff_t index, int size, int sizebits)
pgoff_t index, int size, int sizebits, gfp_t gfp)
{
struct inode *inode = bdev->bd_inode;
struct page *page;
@ -1002,8 +1002,8 @@ grow_dev_page(struct block_device *bdev, sector_t block,
int ret = 0; /* Will call free_more_memory() */
gfp_t gfp_mask;
gfp_mask = mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS;
gfp_mask |= __GFP_MOVABLE;
gfp_mask = (mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS) | gfp;
/*
* XXX: __getblk_slow() can not really deal with failure and
* will endlessly loop on improvised global reclaim. Prefer
@ -1060,7 +1060,7 @@ failed:
* that page was dirty, the buffers are set dirty also.
*/
static int
grow_buffers(struct block_device *bdev, sector_t block, int size)
grow_buffers(struct block_device *bdev, sector_t block, int size, gfp_t gfp)
{
pgoff_t index;
int sizebits;
@ -1087,11 +1087,12 @@ grow_buffers(struct block_device *bdev, sector_t block, int size)
}
/* Create a page with the proper size buffers.. */
return grow_dev_page(bdev, block, index, size, sizebits);
return grow_dev_page(bdev, block, index, size, sizebits, gfp);
}
static struct buffer_head *
__getblk_slow(struct block_device *bdev, sector_t block, int size)
struct buffer_head *
__getblk_slow(struct block_device *bdev, sector_t block,
unsigned size, gfp_t gfp)
{
/* Size must be multiple of hard sectorsize */
if (unlikely(size & (bdev_logical_block_size(bdev)-1) ||
@ -1113,13 +1114,14 @@ __getblk_slow(struct block_device *bdev, sector_t block, int size)
if (bh)
return bh;
ret = grow_buffers(bdev, block, size);
ret = grow_buffers(bdev, block, size, gfp);
if (ret < 0)
return NULL;
if (ret == 0)
free_more_memory();
}
}
EXPORT_SYMBOL(__getblk_slow);
/*
* The relationship between dirty buffers and dirty pages:
@ -1373,24 +1375,25 @@ __find_get_block(struct block_device *bdev, sector_t block, unsigned size)
EXPORT_SYMBOL(__find_get_block);
/*
* __getblk will locate (and, if necessary, create) the buffer_head
* __getblk_gfp() will locate (and, if necessary, create) the buffer_head
* which corresponds to the passed block_device, block and size. The
* returned buffer has its reference count incremented.
*
* __getblk() will lock up the machine if grow_dev_page's try_to_free_buffers()
* attempt is failing. FIXME, perhaps?
* __getblk_gfp() will lock up the machine if grow_dev_page's
* try_to_free_buffers() attempt is failing. FIXME, perhaps?
*/
struct buffer_head *
__getblk(struct block_device *bdev, sector_t block, unsigned size)
__getblk_gfp(struct block_device *bdev, sector_t block,
unsigned size, gfp_t gfp)
{
struct buffer_head *bh = __find_get_block(bdev, block, size);
might_sleep();
if (bh == NULL)
bh = __getblk_slow(bdev, block, size);
bh = __getblk_slow(bdev, block, size, gfp);
return bh;
}
EXPORT_SYMBOL(__getblk);
EXPORT_SYMBOL(__getblk_gfp);
/*
* Do async read-ahead on a buffer..
@ -1406,24 +1409,28 @@ void __breadahead(struct block_device *bdev, sector_t block, unsigned size)
EXPORT_SYMBOL(__breadahead);
/**
* __bread() - reads a specified block and returns the bh
* __bread_gfp() - reads a specified block and returns the bh
* @bdev: the block_device to read from
* @block: number of block
* @size: size (in bytes) to read
*
* @gfp: page allocation flag
*
* Reads a specified block, and returns buffer head that contains it.
* The page cache can be allocated from non-movable area
* not to prevent page migration if you set gfp to zero.
* It returns NULL if the block was unreadable.
*/
struct buffer_head *
__bread(struct block_device *bdev, sector_t block, unsigned size)
__bread_gfp(struct block_device *bdev, sector_t block,
unsigned size, gfp_t gfp)
{
struct buffer_head *bh = __getblk(bdev, block, size);
struct buffer_head *bh = __getblk_gfp(bdev, block, size, gfp);
if (likely(bh) && !buffer_uptodate(bh))
bh = __bread_slow(bh);
return bh;
}
EXPORT_SYMBOL(__bread);
EXPORT_SYMBOL(__bread_gfp);
/*
* invalidate_bh_lrus() is called rarely - but not only at unmount.
@ -2082,6 +2089,7 @@ int generic_write_end(struct file *file, struct address_space *mapping,
struct page *page, void *fsdata)
{
struct inode *inode = mapping->host;
loff_t old_size = inode->i_size;
int i_size_changed = 0;
copied = block_write_end(file, mapping, pos, len, copied, page, fsdata);
@ -2101,6 +2109,8 @@ int generic_write_end(struct file *file, struct address_space *mapping,
unlock_page(page);
page_cache_release(page);
if (old_size < pos)
pagecache_isize_extended(inode, old_size, pos);
/*
* Don't mark the inode dirty under page lock. First, it unnecessarily
* makes the holding time of page lock longer. Second, it forces lock

15
fs/ext4/balloc.c
View File

@ -176,7 +176,7 @@ static unsigned int num_clusters_in_group(struct super_block *sb,
}
/* Initializes an uninitialized block bitmap */
static void ext4_init_block_bitmap(struct super_block *sb,
static int ext4_init_block_bitmap(struct super_block *sb,
struct buffer_head *bh,
ext4_group_t block_group,
struct ext4_group_desc *gdp)
@ -192,7 +192,6 @@ static void ext4_init_block_bitmap(struct super_block *sb,
/* If checksum is bad mark all blocks used to prevent allocation
* essentially implementing a per-group read-only flag. */
if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) {
ext4_error(sb, "Checksum bad for group %u", block_group);
grp = ext4_get_group_info(sb, block_group);
if (!EXT4_MB_GRP_BBITMAP_CORRUPT(grp))
percpu_counter_sub(&sbi->s_freeclusters_counter,
@ -205,7 +204,7 @@ static void ext4_init_block_bitmap(struct super_block *sb,
count);
}
set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state);
return;
return -EIO;
}
memset(bh->b_data, 0, sb->s_blocksize);
@ -243,6 +242,7 @@ static void ext4_init_block_bitmap(struct super_block *sb,
sb->s_blocksize * 8, bh->b_data);
ext4_block_bitmap_csum_set(sb, block_group, gdp, bh);
ext4_group_desc_csum_set(sb, block_group, gdp);
return 0;
}
/* Return the number of free blocks in a block group. It is used when
@ -438,11 +438,15 @@ ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group)
}
ext4_lock_group(sb, block_group);
if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
ext4_init_block_bitmap(sb, bh, block_group, desc);
int err;
err = ext4_init_block_bitmap(sb, bh, block_group, desc);
set_bitmap_uptodate(bh);
set_buffer_uptodate(bh);
ext4_unlock_group(sb, block_group);
unlock_buffer(bh);
if (err)
ext4_error(sb, "Checksum bad for grp %u", block_group);
return bh;
}
ext4_unlock_group(sb, block_group);
@ -636,8 +640,7 @@ ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
* Account for the allocated meta blocks. We will never
* fail EDQUOT for metdata, but we do account for it.
*/
if (!(*errp) &&
ext4_test_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED)) {
if (!(*errp) && (flags & EXT4_MB_DELALLOC_RESERVED)) {
spin_lock(&EXT4_I(inode)->i_block_reservation_lock);
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
dquot_alloc_block_nofail(inode,

12
fs/ext4/bitmap.c
View File

@ -24,8 +24,7 @@ int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
__u32 provided, calculated;
struct ext4_sb_info *sbi = EXT4_SB(sb);
if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(sb))
return 1;
provided = le16_to_cpu(gdp->bg_inode_bitmap_csum_lo);
@ -46,8 +45,7 @@ void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
__u32 csum;
struct ext4_sb_info *sbi = EXT4_SB(sb);
if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(sb))
return;
csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)bh->b_data, sz);
@ -65,8 +63,7 @@ int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
struct ext4_sb_info *sbi = EXT4_SB(sb);
int sz = EXT4_CLUSTERS_PER_GROUP(sb) / 8;
if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(sb))
return 1;
provided = le16_to_cpu(gdp->bg_block_bitmap_csum_lo);
@ -91,8 +88,7 @@ void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
__u32 csum;
struct ext4_sb_info *sbi = EXT4_SB(sb);
if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(sb))
return;
csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)bh->b_data, sz);

8
fs/ext4/dir.c
View File

@ -151,13 +151,11 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
&file->f_ra, file,
index, 1);
file->f_ra.prev_pos = (loff_t)index << PAGE_CACHE_SHIFT;
bh = ext4_bread(NULL, inode, map.m_lblk, 0, &err);
bh = ext4_bread(NULL, inode, map.m_lblk, 0);
if (IS_ERR(bh))
return PTR_ERR(bh);
}
/*
* We ignore I/O errors on directories so users have a chance
* of recovering data when there's a bad sector
*/
if (!bh) {
if (!dir_has_error) {
EXT4_ERROR_FILE(file, 0,

50
fs/ext4/ext4.h
View File

@ -572,15 +572,15 @@ enum {
/*
* The bit position of these flags must not overlap with any of the
* EXT4_GET_BLOCKS_*. They are used by ext4_ext_find_extent(),
* EXT4_GET_BLOCKS_*. They are used by ext4_find_extent(),
* read_extent_tree_block(), ext4_split_extent_at(),
* ext4_ext_insert_extent(), and ext4_ext_create_new_leaf().
* EXT4_EX_NOCACHE is used to indicate that the we shouldn't be
* caching the extents when reading from the extent tree while a
* truncate or punch hole operation is in progress.
*/
#define EXT4_EX_NOCACHE 0x0400
#define EXT4_EX_FORCE_CACHE 0x0800
#define EXT4_EX_NOCACHE 0x40000000
#define EXT4_EX_FORCE_CACHE 0x20000000
/*
* Flags used by ext4_free_blocks
@ -890,6 +890,7 @@ struct ext4_inode_info {
struct ext4_es_tree i_es_tree;
rwlock_t i_es_lock;
struct list_head i_es_lru;
unsigned int i_es_all_nr; /* protected by i_es_lock */
unsigned int i_es_lru_nr; /* protected by i_es_lock */
unsigned long i_touch_when; /* jiffies of last accessing */
@ -1174,6 +1175,9 @@ struct ext4_super_block {
#define EXT4_MF_MNTDIR_SAMPLED 0x0001
#define EXT4_MF_FS_ABORTED 0x0002 /* Fatal error detected */
/* Number of quota types we support */
#define EXT4_MAXQUOTAS 2
/*
* fourth extended-fs super-block data in memory
*/
@ -1237,7 +1241,7 @@ struct ext4_sb_info {
u32 s_min_batch_time;
struct block_device *journal_bdev;
#ifdef CONFIG_QUOTA
char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */
char *s_qf_names[EXT4_MAXQUOTAS]; /* Names of quota files with journalled quota */
int s_jquota_fmt; /* Format of quota to use */
#endif
unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */
@ -1330,8 +1334,7 @@ struct ext4_sb_info {
/* Reclaim extents from extent status tree */
struct shrinker s_es_shrinker;
struct list_head s_es_lru;
unsigned long s_es_last_sorted;
struct percpu_counter s_extent_cache_cnt;
struct ext4_es_stats s_es_stats;
struct mb_cache *s_mb_cache;
spinlock_t s_es_lru_lock ____cacheline_aligned_in_smp;
@ -1399,7 +1402,6 @@ enum {
EXT4_STATE_EXT_MIGRATE, /* Inode is migrating */
EXT4_STATE_DIO_UNWRITTEN, /* need convert on dio done*/
EXT4_STATE_NEWENTRY, /* File just added to dir */
EXT4_STATE_DELALLOC_RESERVED, /* blks already reserved for delalloc */
EXT4_STATE_DIOREAD_LOCK, /* Disable support for dio read
nolocking */
EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */
@ -2086,10 +2088,8 @@ extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
extern int ext4_trim_fs(struct super_block *, struct fstrim_range *);
/* inode.c */
struct buffer_head *ext4_getblk(handle_t *, struct inode *,
ext4_lblk_t, int, int *);
struct buffer_head *ext4_bread(handle_t *, struct inode *,
ext4_lblk_t, int, int *);
struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int);
struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int);
int ext4_get_block_write(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create);
int ext4_get_block(struct inode *inode, sector_t iblock,
@ -2109,6 +2109,7 @@ int do_journal_get_write_access(handle_t *handle,
#define CONVERT_INLINE_DATA 2
extern struct inode *ext4_iget(struct super_block *, unsigned long);
extern struct inode *ext4_iget_normal(struct super_block *, unsigned long);
extern int ext4_write_inode(struct inode *, struct writeback_control *);
extern int ext4_setattr(struct dentry *, struct iattr *);
extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry,
@ -2332,10 +2333,18 @@ extern int ext4_register_li_request(struct super_block *sb,
static inline int ext4_has_group_desc_csum(struct super_block *sb)
{
return EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
EXT4_FEATURE_RO_COMPAT_GDT_CSUM) ||
(EXT4_SB(sb)->s_chksum_driver != NULL);
}
static inline int ext4_has_metadata_csum(struct super_block *sb)
{
WARN_ON_ONCE(EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
!EXT4_SB(sb)->s_chksum_driver);
return (EXT4_SB(sb)->s_chksum_driver != NULL);
}
static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
{
return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) |
@ -2731,21 +2740,26 @@ extern int ext4_can_extents_be_merged(struct inode *inode,
struct ext4_extent *ex1,
struct ext4_extent *ex2);
extern int ext4_ext_insert_extent(handle_t *, struct inode *,
struct ext4_ext_path *,
struct ext4_ext_path **,
struct ext4_extent *, int);
extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t,
struct ext4_ext_path *,
int flags);
extern struct ext4_ext_path *ext4_find_extent(struct inode *, ext4_lblk_t,
struct ext4_ext_path **,
int flags);
extern void ext4_ext_drop_refs(struct ext4_ext_path *);
extern int ext4_ext_check_inode(struct inode *inode);
extern int ext4_find_delalloc_range(struct inode *inode,
ext4_lblk_t lblk_start,
ext4_lblk_t lblk_end);
extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk);
extern ext4_lblk_t ext4_ext_next_allocated_block(struct ext4_ext_path *path);
extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len);
extern int ext4_ext_precache(struct inode *inode);
extern int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len);
extern int ext4_swap_extents(handle_t *handle, struct inode *inode1,
struct inode *inode2, ext4_lblk_t lblk1,
ext4_lblk_t lblk2, ext4_lblk_t count,
int mark_unwritten,int *err);
/* move_extent.c */
extern void ext4_double_down_write_data_sem(struct inode *first,
@ -2755,8 +2769,6 @@ extern void ext4_double_up_write_data_sem(struct inode *orig_inode,
extern int ext4_move_extents(struct file *o_filp, struct file *d_filp,
__u64 start_orig, __u64 start_donor,
__u64 len, __u64 *moved_len);
extern int mext_next_extent(struct inode *inode, struct ext4_ext_path *path,
struct ext4_extent **extent);
/* page-io.c */
extern int __init ext4_init_pageio(void);

1
fs/ext4/ext4_extents.h
View File

@ -123,6 +123,7 @@ find_ext4_extent_tail(struct ext4_extent_header *eh)
struct ext4_ext_path {
ext4_fsblk_t p_block;
__u16 p_depth;
__u16 p_maxdepth;
struct ext4_extent *p_ext;
struct ext4_extent_idx *p_idx;
struct ext4_extent_header *p_hdr;

4
fs/ext4/ext4_jbd2.c
View File

@ -256,8 +256,8 @@ int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
set_buffer_prio(bh);
if (ext4_handle_valid(handle)) {
err = jbd2_journal_dirty_metadata(handle, bh);
/* Errors can only happen if there is a bug */
if (WARN_ON_ONCE(err)) {
/* Errors can only happen due to aborted journal or a nasty bug */
if (!is_handle_aborted(handle) && WARN_ON_ONCE(err)) {
ext4_journal_abort_handle(where, line, __func__, bh,
handle, err);
if (inode == NULL) {

6
fs/ext4/ext4_jbd2.h
View File

@ -102,9 +102,9 @@
#define EXT4_QUOTA_INIT_BLOCKS(sb) 0
#define EXT4_QUOTA_DEL_BLOCKS(sb) 0
#endif
#define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb))
#define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb))
#define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb))
#define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb))
#define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb))
#define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb))
static inline int ext4_jbd2_credits_xattr(struct inode *inode)
{

621
fs/ext4/extents.c
View File

File diff suppressed because it is too large Load Diff

200
fs/ext4/extents_status.c
View File

@ -11,6 +11,8 @@
*/
#include <linux/rbtree.h>
#include <linux/list_sort.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include "ext4.h"
#include "extents_status.h"
@ -313,19 +315,27 @@ ext4_es_alloc_extent(struct inode *inode, ext4_lblk_t lblk, ext4_lblk_t len,
*/
if (!ext4_es_is_delayed(es)) {
EXT4_I(inode)->i_es_lru_nr++;
percpu_counter_inc(&EXT4_SB(inode->i_sb)->s_extent_cache_cnt);
percpu_counter_inc(&EXT4_SB(inode->i_sb)->
s_es_stats.es_stats_lru_cnt);
}
EXT4_I(inode)->i_es_all_nr++;
percpu_counter_inc(&EXT4_SB(inode->i_sb)->s_es_stats.es_stats_all_cnt);
return es;
}
static void ext4_es_free_extent(struct inode *inode, struct extent_status *es)
{
EXT4_I(inode)->i_es_all_nr--;
percpu_counter_dec(&EXT4_SB(inode->i_sb)->s_es_stats.es_stats_all_cnt);
/* Decrease the lru counter when this es is not delayed */
if (!ext4_es_is_delayed(es)) {
BUG_ON(EXT4_I(inode)->i_es_lru_nr == 0);
EXT4_I(inode)->i_es_lru_nr--;
percpu_counter_dec(&EXT4_SB(inode->i_sb)->s_extent_cache_cnt);
percpu_counter_dec(&EXT4_SB(inode->i_sb)->
s_es_stats.es_stats_lru_cnt);
}
kmem_cache_free(ext4_es_cachep, es);
@ -426,7 +436,7 @@ static void ext4_es_insert_extent_ext_check(struct inode *inode,
unsigned short ee_len;
int depth, ee_status, es_status;
path = ext4_ext_find_extent(inode, es->es_lblk, NULL, EXT4_EX_NOCACHE);
path = ext4_find_extent(inode, es->es_lblk, NULL, EXT4_EX_NOCACHE);
if (IS_ERR(path))
return;
@ -499,10 +509,8 @@ static void ext4_es_insert_extent_ext_check(struct inode *inode,
}
}
out:
if (path) {
ext4_ext_drop_refs(path);
kfree(path);
}
ext4_ext_drop_refs(path);
kfree(path);
}
static void ext4_es_insert_extent_ind_check(struct inode *inode,
@ -731,6 +739,7 @@ int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk,
struct extent_status *es)
{
struct ext4_es_tree *tree;
struct ext4_es_stats *stats;
struct extent_status *es1 = NULL;
struct rb_node *node;
int found = 0;
@ -767,11 +776,15 @@ int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk,
}
out:
stats = &EXT4_SB(inode->i_sb)->s_es_stats;
if (found) {
BUG_ON(!es1);
es->es_lblk = es1->es_lblk;
es->es_len = es1->es_len;
es->es_pblk = es1->es_pblk;
stats->es_stats_cache_hits++;
} else {
stats->es_stats_cache_misses++;
}
read_unlock(&EXT4_I(inode)->i_es_lock);
@ -933,11 +946,16 @@ static int __ext4_es_shrink(struct ext4_sb_info *sbi, int nr_to_scan,
struct ext4_inode_info *locked_ei)
{
struct ext4_inode_info *ei;
struct ext4_es_stats *es_stats;
struct list_head *cur, *tmp;
LIST_HEAD(skipped);
ktime_t start_time;
u64 scan_time;
int nr_shrunk = 0;
int retried = 0, skip_precached = 1, nr_skipped = 0;
es_stats = &sbi->s_es_stats;
start_time = ktime_get();
spin_lock(&sbi->s_es_lru_lock);
retry:
@ -948,7 +966,8 @@ retry:
* If we have already reclaimed all extents from extent
* status tree, just stop the loop immediately.
*/
if (percpu_counter_read_positive(&sbi->s_extent_cache_cnt) == 0)
if (percpu_counter_read_positive(
&es_stats->es_stats_lru_cnt) == 0)
break;
ei = list_entry(cur, struct ext4_inode_info, i_es_lru);
@ -958,7 +977,7 @@ retry:
* time. Normally we try hard to avoid shrinking
* precached inodes, but we will as a last resort.
*/
if ((sbi->s_es_last_sorted < ei->i_touch_when) ||
if ((es_stats->es_stats_last_sorted < ei->i_touch_when) ||
(skip_precached && ext4_test_inode_state(&ei->vfs_inode,
EXT4_STATE_EXT_PRECACHED))) {
nr_skipped++;
@ -992,7 +1011,7 @@ retry:
if ((nr_shrunk == 0) && nr_skipped && !retried) {
retried++;
list_sort(NULL, &sbi->s_es_lru, ext4_inode_touch_time_cmp);
sbi->s_es_last_sorted = jiffies;
es_stats->es_stats_last_sorted = jiffies;
ei = list_first_entry(&sbi->s_es_lru, struct ext4_inode_info,
i_es_lru);
/*
@ -1010,6 +1029,22 @@ retry:
if (locked_ei && nr_shrunk == 0)
nr_shrunk = __es_try_to_reclaim_extents(locked_ei, nr_to_scan);
scan_time = ktime_to_ns(ktime_sub(ktime_get(), start_time));
if (likely(es_stats->es_stats_scan_time))
es_stats->es_stats_scan_time = (scan_time +
es_stats->es_stats_scan_time*3) / 4;
else
es_stats->es_stats_scan_time = scan_time;
if (scan_time > es_stats->es_stats_max_scan_time)
es_stats->es_stats_max_scan_time = scan_time;
if (likely(es_stats->es_stats_shrunk))
es_stats->es_stats_shrunk = (nr_shrunk +
es_stats->es_stats_shrunk*3) / 4;
else
es_stats->es_stats_shrunk = nr_shrunk;
trace_ext4_es_shrink(sbi->s_sb, nr_shrunk, scan_time, skip_precached,
nr_skipped, retried);
return nr_shrunk;
}
@ -1020,8 +1055,8 @@ static unsigned long ext4_es_count(struct shrinker *shrink,
struct ext4_sb_info *sbi;
sbi = container_of(shrink, struct ext4_sb_info, s_es_shrinker);
nr = percpu_counter_read_positive(&sbi->s_extent_cache_cnt);
trace_ext4_es_shrink_enter(sbi->s_sb, sc->nr_to_scan, nr);
nr = percpu_counter_read_positive(&sbi->s_es_stats.es_stats_lru_cnt);
trace_ext4_es_shrink_count(sbi->s_sb, sc->nr_to_scan, nr);
return nr;
}
@ -1033,31 +1068,160 @@ static unsigned long ext4_es_scan(struct shrinker *shrink,
int nr_to_scan = sc->nr_to_scan;
int ret, nr_shrunk;
ret = percpu_counter_read_positive(&sbi->s_extent_cache_cnt);
trace_ext4_es_shrink_enter(sbi->s_sb, nr_to_scan, ret);
ret = percpu_counter_read_positive(&sbi->s_es_stats.es_stats_lru_cnt);
trace_ext4_es_shrink_scan_enter(sbi->s_sb, nr_to_scan, ret);
if (!nr_to_scan)
return ret;
nr_shrunk = __ext4_es_shrink(sbi, nr_to_scan, NULL);
trace_ext4_es_shrink_exit(sbi->s_sb, nr_shrunk, ret);
trace_ext4_es_shrink_scan_exit(sbi->s_sb, nr_shrunk, ret);
return nr_shrunk;
}
void ext4_es_register_shrinker(struct ext4_sb_info *sbi)
static void *ext4_es_seq_shrinker_info_start(struct seq_file *seq, loff_t *pos)
{
return *pos ? NULL : SEQ_START_TOKEN;
}
static void *
ext4_es_seq_shrinker_info_next(struct seq_file *seq, void *v, loff_t *pos)
{
return NULL;
}
static int ext4_es_seq_shrinker_info_show(struct seq_file *seq, void *v)
{
struct ext4_sb_info *sbi = seq->private;
struct ext4_es_stats *es_stats = &sbi->s_es_stats;
struct ext4_inode_info *ei, *max = NULL;
unsigned int inode_cnt = 0;
if (v != SEQ_START_TOKEN)
return 0;
/* here we just find an inode that has the max nr. of objects */
spin_lock(&sbi->s_es_lru_lock);
list_for_each_entry(ei, &sbi->s_es_lru, i_es_lru) {
inode_cnt++;
if (max && max->i_es_all_nr < ei->i_es_all_nr)
max = ei;
else if (!max)
max = ei;
}
spin_unlock(&sbi->s_es_lru_lock);
seq_printf(seq, "stats:\n %lld objects\n %lld reclaimable objects\n",
percpu_counter_sum_positive(&es_stats->es_stats_all_cnt),
percpu_counter_sum_positive(&es_stats->es_stats_lru_cnt));
seq_printf(seq, " %lu/%lu cache hits/misses\n",
es_stats->es_stats_cache_hits,
es_stats->es_stats_cache_misses);
if (es_stats->es_stats_last_sorted != 0)
seq_printf(seq, " %u ms last sorted interval\n",
jiffies_to_msecs(jiffies -
es_stats->es_stats_last_sorted));
if (inode_cnt)
seq_printf(seq, " %d inodes on lru list\n", inode_cnt);
seq_printf(seq, "average:\n %llu us scan time\n",
div_u64(es_stats->es_stats_scan_time, 1000));
seq_printf(seq, " %lu shrunk objects\n", es_stats->es_stats_shrunk);
if (inode_cnt)
seq_printf(seq,
"maximum:\n %lu inode (%u objects, %u reclaimable)\n"
" %llu us max scan time\n",
max->vfs_inode.i_ino, max->i_es_all_nr, max->i_es_lru_nr,
div_u64(es_stats->es_stats_max_scan_time, 1000));
return 0;
}
static void ext4_es_seq_shrinker_info_stop(struct seq_file *seq, void *v)
{
}
static const struct seq_operations ext4_es_seq_shrinker_info_ops = {
.start = ext4_es_seq_shrinker_info_start,
.next = ext4_es_seq_shrinker_info_next,
.stop = ext4_es_seq_shrinker_info_stop,
.show = ext4_es_seq_shrinker_info_show,
};
static int
ext4_es_seq_shrinker_info_open(struct inode *inode, struct file *file)
{
int ret;
ret = seq_open(file, &ext4_es_seq_shrinker_info_ops);
if (!ret) {
struct seq_file *m = file->private_data;
m->private = PDE_DATA(inode);
}
return ret;
}
static int
ext4_es_seq_shrinker_info_release(struct inode *inode, struct file *file)
{
return seq_release(inode, file);
}
static const struct file_operations ext4_es_seq_shrinker_info_fops = {
.owner = THIS_MODULE,
.open = ext4_es_seq_shrinker_info_open,
.read = seq_read,
.llseek = seq_lseek,
.release = ext4_es_seq_shrinker_info_release,
};
int ext4_es_register_shrinker(struct ext4_sb_info *sbi)
{
int err;
INIT_LIST_HEAD(&sbi->s_es_lru);
spin_lock_init(&sbi->s_es_lru_lock);
sbi->s_es_last_sorted = 0;
sbi->s_es_stats.es_stats_last_sorted = 0;
sbi->s_es_stats.es_stats_shrunk = 0;
sbi->s_es_stats.es_stats_cache_hits = 0;
sbi->s_es_stats.es_stats_cache_misses = 0;
sbi->s_es_stats.es_stats_scan_time = 0;
sbi->s_es_stats.es_stats_max_scan_time = 0;
err = percpu_counter_init(&sbi->s_es_stats.es_stats_all_cnt, 0, GFP_KERNEL);
if (err)
return err;
err = percpu_counter_init(&sbi->s_es_stats.es_stats_lru_cnt, 0, GFP_KERNEL);
if (err)
goto err1;
sbi->s_es_shrinker.scan_objects = ext4_es_scan;
sbi->s_es_shrinker.count_objects = ext4_es_count;
sbi->s_es_shrinker.seeks = DEFAULT_SEEKS;
register_shrinker(&sbi->s_es_shrinker);
err = register_shrinker(&sbi->s_es_shrinker);
if (err)
goto err2;
if (sbi->s_proc)
proc_create_data("es_shrinker_info", S_IRUGO, sbi->s_proc,
&ext4_es_seq_shrinker_info_fops, sbi);
return 0;
err2:
percpu_counter_destroy(&sbi->s_es_stats.es_stats_lru_cnt);
err1:
percpu_counter_destroy(&sbi->s_es_stats.es_stats_all_cnt);
return err;
}
void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi)
{
if (sbi->s_proc)
remove_proc_entry("es_shrinker_info", sbi->s_proc);
percpu_counter_destroy(&sbi->s_es_stats.es_stats_all_cnt);
percpu_counter_destroy(&sbi->s_es_stats.es_stats_lru_cnt);
unregister_shrinker(&sbi->s_es_shrinker);
}

13
fs/ext4/extents_status.h
View File

@ -64,6 +64,17 @@ struct ext4_es_tree {
struct extent_status *cache_es; /* recently accessed extent */
};
struct ext4_es_stats {
unsigned long es_stats_last_sorted;
unsigned long es_stats_shrunk;
unsigned long es_stats_cache_hits;
unsigned long es_stats_cache_misses;
u64 es_stats_scan_time;
u64 es_stats_max_scan_time;
struct percpu_counter es_stats_all_cnt;
struct percpu_counter es_stats_lru_cnt;
};
extern int __init ext4_init_es(void);
extern void ext4_exit_es(void);
extern void ext4_es_init_tree(struct ext4_es_tree *tree);
@ -138,7 +149,7 @@ static inline void ext4_es_store_pblock_status(struct extent_status *es,
(pb & ~ES_MASK));
}
extern void ext4_es_register_shrinker(struct ext4_sb_info *sbi);
extern int ext4_es_register_shrinker(struct ext4_sb_info *sbi);
extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi);
extern void ext4_es_lru_add(struct inode *inode);
extern void ext4_es_lru_del(struct inode *inode);

3
fs/ext4/ialloc.c
View File

@ -1011,8 +1011,7 @@ got:
spin_unlock(&sbi->s_next_gen_lock);
/* Precompute checksum seed for inode metadata */
if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
if (ext4_has_metadata_csum(sb)) {
__u32 csum;
__le32 inum = cpu_to_le32(inode->i_ino);
__le32 gen = cpu_to_le32(inode->i_generation);

86
fs/ext4/indirect.c
View File

@ -318,34 +318,24 @@ static int ext4_blks_to_allocate(Indirect *branch, int k, unsigned int blks,
* ext4_alloc_block() (normally -ENOSPC). Otherwise we set the chain
* as described above and return 0.
*/
static int ext4_alloc_branch(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock, int indirect_blks,
int *blks, ext4_fsblk_t goal,
ext4_lblk_t *offsets, Indirect *branch)
static int ext4_alloc_branch(handle_t *handle,
struct ext4_allocation_request *ar,
int indirect_blks, ext4_lblk_t *offsets,
Indirect *branch)
{
struct ext4_allocation_request ar;
struct buffer_head * bh;
ext4_fsblk_t b, new_blocks[4];
__le32 *p;
int i, j, err, len = 1;
/*
* Set up for the direct block allocation
*/
memset(&ar, 0, sizeof(ar));
ar.inode = inode;
ar.len = *blks;
ar.logical = iblock;
if (S_ISREG(inode->i_mode))
ar.flags = EXT4_MB_HINT_DATA;
for (i = 0; i <= indirect_blks; i++) {
if (i == indirect_blks) {
ar.goal = goal;
new_blocks[i] = ext4_mb_new_blocks(handle, &ar, &err);
new_blocks[i] = ext4_mb_new_blocks(handle, ar, &err);
} else
goal = new_blocks[i] = ext4_new_meta_blocks(handle, inode,
goal, 0, NULL, &err);
ar->goal = new_blocks[i] = ext4_new_meta_blocks(handle,
ar->inode, ar->goal,
ar->flags & EXT4_MB_DELALLOC_RESERVED,
NULL, &err);
if (err) {
i--;
goto failed;
@ -354,7 +344,7 @@ static int ext4_alloc_branch(handle_t *handle, struct inode *inode,
if (i == 0)
continue;
bh = branch[i].bh = sb_getblk(inode->i_sb, new_blocks[i-1]);
bh = branch[i].bh = sb_getblk(ar->inode->i_sb, new_blocks[i-1]);
if (unlikely(!bh)) {
err = -ENOMEM;
goto failed;
@ -372,7 +362,7 @@ static int ext4_alloc_branch(handle_t *handle, struct inode *inode,
b = new_blocks[i];
if (i == indirect_blks)
len = ar.len;
len = ar->len;
for (j = 0; j < len; j++)
*p++ = cpu_to_le32(b++);
@ -381,11 +371,10 @@ static int ext4_alloc_branch(handle_t *handle, struct inode *inode,
unlock_buffer(bh);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, inode, bh);
err = ext4_handle_dirty_metadata(handle, ar->inode, bh);
if (err)
goto failed;
}
*blks = ar.len;
return 0;
failed:
for (; i >= 0; i--) {
@ -396,10 +385,10 @@ failed:
* existing before ext4_alloc_branch() was called.
*/
if (i > 0 && i != indirect_blks && branch[i].bh)
ext4_forget(handle, 1, inode, branch[i].bh,
ext4_forget(handle, 1, ar->inode, branch[i].bh,
branch[i].bh->b_blocknr);
ext4_free_blocks(handle, inode, NULL, new_blocks[i],
(i == indirect_blks) ? ar.len : 1, 0);
ext4_free_blocks(handle, ar->inode, NULL, new_blocks[i],
(i == indirect_blks) ? ar->len : 1, 0);
}
return err;
}
@ -419,9 +408,9 @@ failed:
* inode (->i_blocks, etc.). In case of success we end up with the full
* chain to new block and return 0.
*/
static int ext4_splice_branch(handle_t *handle, struct inode *inode,
ext4_lblk_t block, Indirect *where, int num,
int blks)
static int ext4_splice_branch(handle_t *handle,
struct ext4_allocation_request *ar,
Indirect *where, int num)
{
int i;
int err = 0;
@ -446,9 +435,9 @@ static int ext4_splice_branch(handle_t *handle, struct inode *inode,
* Update the host buffer_head or inode to point to more just allocated
* direct blocks blocks
*/
if (num == 0 && blks > 1) {
if (num == 0 && ar->len > 1) {
current_block = le32_to_cpu(where->key) + 1;
for (i = 1; i < blks; i++)
for (i = 1; i < ar->len; i++)
*(where->p + i) = cpu_to_le32(current_block++);
}
@ -465,14 +454,14 @@ static int ext4_splice_branch(handle_t *handle, struct inode *inode,
*/
jbd_debug(5, "splicing indirect only\n");
BUFFER_TRACE(where->bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, inode, where->bh);
err = ext4_handle_dirty_metadata(handle, ar->inode, where->bh);
if (err)
goto err_out;
} else {
/*
* OK, we spliced it into the inode itself on a direct block.
*/
ext4_mark_inode_dirty(handle, inode);
ext4_mark_inode_dirty(handle, ar->inode);
jbd_debug(5, "splicing direct\n");
}
return err;
@ -484,11 +473,11 @@ err_out:
* need to revoke the block, which is why we don't
* need to set EXT4_FREE_BLOCKS_METADATA.
*/
ext4_free_blocks(handle, inode, where[i].bh, 0, 1,
ext4_free_blocks(handle, ar->inode, where[i].bh, 0, 1,
EXT4_FREE_BLOCKS_FORGET);
}
ext4_free_blocks(handle, inode, NULL, le32_to_cpu(where[num].key),
blks, 0);
ext4_free_blocks(handle, ar->inode, NULL, le32_to_cpu(where[num].key),
ar->len, 0);
return err;
}
@ -525,11 +514,11 @@ int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
struct ext4_map_blocks *map,
int flags)
{
struct ext4_allocation_request ar;
int err = -EIO;
ext4_lblk_t offsets[4];
Indirect chain[4];
Indirect *partial;
ext4_fsblk_t goal;
int indirect_blks;
int blocks_to_boundary = 0;
int depth;
@ -579,7 +568,16 @@ int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
return -ENOSPC;
}
goal = ext4_find_goal(inode, map->m_lblk, partial);
/* Set up for the direct block allocation */
memset(&ar, 0, sizeof(ar));
ar.inode = inode;
ar.logical = map->m_lblk;
if (S_ISREG(inode->i_mode))
ar.flags = EXT4_MB_HINT_DATA;
if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE)
ar.flags |= EXT4_MB_DELALLOC_RESERVED;
ar.goal = ext4_find_goal(inode, map->m_lblk, partial);
/* the number of blocks need to allocate for [d,t]indirect blocks */
indirect_blks = (chain + depth) - partial - 1;
@ -588,13 +586,13 @@ int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
* Next look up the indirect map to count the totoal number of
* direct blocks to allocate for this branch.
*/
count = ext4_blks_to_allocate(partial, indirect_blks,
map->m_len, blocks_to_boundary);
ar.len = ext4_blks_to_allocate(partial, indirect_blks,
map->m_len, blocks_to_boundary);
/*
* Block out ext4_truncate while we alter the tree
*/
err = ext4_alloc_branch(handle, inode, map->m_lblk, indirect_blks,
&count, goal,
err = ext4_alloc_branch(handle, &ar, indirect_blks,
offsets + (partial - chain), partial);
/*
@ -605,14 +603,14 @@ int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
* may need to return -EAGAIN upwards in the worst case. --sct
*/
if (!err)
err = ext4_splice_branch(handle, inode, map->m_lblk,
partial, indirect_blks, count);
err = ext4_splice_branch(handle, &ar, partial, indirect_blks);
if (err)
goto cleanup;
map->m_flags |= EXT4_MAP_NEW;
ext4_update_inode_fsync_trans(handle, inode, 1);
count = ar.len;
got_it:
map->m_flags |= EXT4_MAP_MAPPED;
map->m_pblk = le32_to_cpu(chain[depth-1].key);

7
fs/ext4/inline.c
View File

@ -594,6 +594,7 @@ retry:
if (ret) {
unlock_page(page);
page_cache_release(page);
page = NULL;
ext4_orphan_add(handle, inode);
up_write(&EXT4_I(inode)->xattr_sem);
sem_held = 0;
@ -613,7 +614,8 @@ retry:
if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
goto retry;
block_commit_write(page, from, to);
if (page)
block_commit_write(page, from, to);
out:
if (page) {
unlock_page(page);
@ -1126,8 +1128,7 @@ static int ext4_finish_convert_inline_dir(handle_t *handle,
memcpy((void *)de, buf + EXT4_INLINE_DOTDOT_SIZE,
inline_size - EXT4_INLINE_DOTDOT_SIZE);
if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (ext4_has_metadata_csum(inode->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
inode->i_size = inode->i_sb->s_blocksize;

133
fs/ext4/inode.c
View File

@ -83,8 +83,7 @@ static int ext4_inode_csum_verify(struct inode *inode, struct ext4_inode *raw,
if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
cpu_to_le32(EXT4_OS_LINUX) ||
!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
!ext4_has_metadata_csum(inode->i_sb))
return 1;
provided = le16_to_cpu(raw->i_checksum_lo);
@ -105,8 +104,7 @@ static void ext4_inode_csum_set(struct inode *inode, struct ext4_inode *raw,
if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
cpu_to_le32(EXT4_OS_LINUX) ||
!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
!ext4_has_metadata_csum(inode->i_sb))
return;
csum = ext4_inode_csum(inode, raw, ei);
@ -224,16 +222,15 @@ void ext4_evict_inode(struct inode *inode)
goto no_delete;
}
if (!is_bad_inode(inode))
dquot_initialize(inode);
if (is_bad_inode(inode))
goto no_delete;
dquot_initialize(inode);
if (ext4_should_order_data(inode))
ext4_begin_ordered_truncate(inode, 0);
truncate_inode_pages_final(&inode->i_data);
WARN_ON(atomic_read(&EXT4_I(inode)->i_ioend_count));
if (is_bad_inode(inode))
goto no_delete;
/*
* Protect us against freezing - iput() caller didn't have to have any
@ -590,19 +587,11 @@ found:
/*
* New blocks allocate and/or writing to unwritten extent
* will possibly result in updating i_data, so we take
* the write lock of i_data_sem, and call get_blocks()
* the write lock of i_data_sem, and call get_block()
* with create == 1 flag.
*/
down_write(&EXT4_I(inode)->i_data_sem);
/*
* if the caller is from delayed allocation writeout path
* we have already reserved fs blocks for allocation
* let the underlying get_block() function know to
* avoid double accounting
*/
if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE)
ext4_set_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED);
/*
* We need to check for EXT4 here because migrate
* could have changed the inode type in between
@ -631,8 +620,6 @@ found:
(flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE))
ext4_da_update_reserve_space(inode, retval, 1);
}
if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE)
ext4_clear_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED);
if (retval > 0) {
unsigned int status;
@ -734,11 +721,11 @@ int ext4_get_block(struct inode *inode, sector_t iblock,
* `handle' can be NULL if create is zero
*/
struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode,
ext4_lblk_t block, int create, int *errp)
ext4_lblk_t block, int create)
{
struct ext4_map_blocks map;
struct buffer_head *bh;
int fatal = 0, err;
int err;
J_ASSERT(handle != NULL || create == 0);
@ -747,21 +734,14 @@ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode,
err = ext4_map_blocks(handle, inode, &map,
create ? EXT4_GET_BLOCKS_CREATE : 0);
/* ensure we send some value back into *errp */
*errp = 0;
if (create && err == 0)
err = -ENOSPC; /* should never happen */
if (err == 0)
return create ? ERR_PTR(-ENOSPC) : NULL;
if (err < 0)
*errp = err;
if (err <= 0)
return NULL;
return ERR_PTR(err);
bh = sb_getblk(inode->i_sb, map.m_pblk);
if (unlikely(!bh)) {
*errp = -ENOMEM;
return NULL;
}
if (unlikely(!bh))
return ERR_PTR(-ENOMEM);
if (map.m_flags & EXT4_MAP_NEW) {
J_ASSERT(create != 0);
J_ASSERT(handle != NULL);
@ -775,44 +755,44 @@ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode,
*/
lock_buffer(bh);
BUFFER_TRACE(bh, "call get_create_access");
fatal = ext4_journal_get_create_access(handle, bh);
if (!fatal && !buffer_uptodate(bh)) {
err = ext4_journal_get_create_access(handle, bh);
if (unlikely(err)) {
unlock_buffer(bh);
goto errout;
}
if (!buffer_uptodate(bh)) {
memset(bh->b_data, 0, inode->i_sb->s_blocksize);
set_buffer_uptodate(bh);
}
unlock_buffer(bh);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, inode, bh);
if (!fatal)
fatal = err;
} else {
if (unlikely(err))
goto errout;
} else
BUFFER_TRACE(bh, "not a new buffer");
}
if (fatal) {
*errp = fatal;
brelse(bh);
bh = NULL;
}
return bh;
errout:
brelse(bh);
return ERR_PTR(err);
}
struct buffer_head *ext4_bread(handle_t *handle, struct inode *inode,
ext4_lblk_t block, int create, int *err)
ext4_lblk_t block, int create)
{
struct buffer_head *bh;
bh = ext4_getblk(handle, inode, block, create, err);
if (!bh)
bh = ext4_getblk(handle, inode, block, create);
if (IS_ERR(bh))
return bh;
if (buffer_uptodate(bh))
if (!bh || buffer_uptodate(bh))
return bh;
ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &bh);
wait_on_buffer(bh);
if (buffer_uptodate(bh))
return bh;
put_bh(bh);
*err = -EIO;
return NULL;
return ERR_PTR(-EIO);
}
int ext4_walk_page_buffers(handle_t *handle,
@ -1536,7 +1516,7 @@ out_unlock:
}
/*
* This is a special get_blocks_t callback which is used by
* This is a special get_block_t callback which is used by
* ext4_da_write_begin(). It will either return mapped block or
* reserve space for a single block.
*
@ -2011,12 +1991,10 @@ static int mpage_map_one_extent(handle_t *handle, struct mpage_da_data *mpd)
* in data loss. So use reserved blocks to allocate metadata if
* possible.
*
* We pass in the magic EXT4_GET_BLOCKS_DELALLOC_RESERVE if the blocks
* in question are delalloc blocks. This affects functions in many
* different parts of the allocation call path. This flag exists
* primarily because we don't want to change *many* call functions, so
* ext4_map_blocks() will set the EXT4_STATE_DELALLOC_RESERVED flag
* once the inode's allocation semaphore is taken.
* We pass in the magic EXT4_GET_BLOCKS_DELALLOC_RESERVE if
* the blocks in question are delalloc blocks. This indicates
* that the blocks and quotas has already been checked when
* the data was copied into the page cache.
*/
get_blocks_flags = EXT4_GET_BLOCKS_CREATE |
EXT4_GET_BLOCKS_METADATA_NOFAIL;
@ -2515,6 +2493,20 @@ static int ext4_nonda_switch(struct super_block *sb)
return 0;
}
/* We always reserve for an inode update; the superblock could be there too */
static int ext4_da_write_credits(struct inode *inode, loff_t pos, unsigned len)
{
if (likely(EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_LARGE_FILE)))
return 1;
if (pos + len <= 0x7fffffffULL)
return 1;
/* We might need to update the superblock to set LARGE_FILE */
return 2;
}
static int ext4_da_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@ -2565,7 +2557,8 @@ retry_grab:
* of file which has an already mapped buffer.
*/
retry_journal:
handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, 1);
handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE,
ext4_da_write_credits(inode, pos, len));
if (IS_ERR(handle)) {
page_cache_release(page);
return PTR_ERR(handle);
@ -2658,10 +2651,7 @@ static int ext4_da_write_end(struct file *file,
if (copied && new_i_size > EXT4_I(inode)->i_disksize) {
if (ext4_has_inline_data(inode) ||
ext4_da_should_update_i_disksize(page, end)) {
down_write(&EXT4_I(inode)->i_data_sem);
if (new_i_size > EXT4_I(inode)->i_disksize)
EXT4_I(inode)->i_disksize = new_i_size;
up_write(&EXT4_I(inode)->i_data_sem);
ext4_update_i_disksize(inode, new_i_size);
/* We need to mark inode dirty even if
* new_i_size is less that inode->i_size
* bu greater than i_disksize.(hint delalloc)
@ -3936,8 +3926,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
ei->i_extra_isize = 0;
/* Precompute checksum seed for inode metadata */
if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
if (ext4_has_metadata_csum(sb)) {
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
__u32 csum;
__le32 inum = cpu_to_le32(inode->i_ino);
@ -4127,6 +4116,13 @@ bad_inode:
return ERR_PTR(ret);
}
struct inode *ext4_iget_normal(struct super_block *sb, unsigned long ino)
{
if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO)
return ERR_PTR(-EIO);
return ext4_iget(sb, ino);
}
static int ext4_inode_blocks_set(handle_t *handle,
struct ext4_inode *raw_inode,
struct ext4_inode_info *ei)
@ -4226,7 +4222,8 @@ static int ext4_do_update_inode(handle_t *handle,
EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode);
EXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode);
if (ext4_inode_blocks_set(handle, raw_inode, ei)) {
err = ext4_inode_blocks_set(handle, raw_inode, ei);
if (err) {
spin_unlock(&ei->i_raw_lock);
goto out_brelse;
}
@ -4536,8 +4533,12 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
ext4_orphan_del(NULL, inode);
goto err_out;
}
} else
} else {
loff_t oldsize = inode->i_size;
i_size_write(inode, attr->ia_size);
pagecache_isize_extended(inode, oldsize, inode->i_size);
}
/*
* Blocks are going to be removed from the inode. Wait

13
fs/ext4/ioctl.c
View File

@ -331,8 +331,7 @@ flags_out:
if (!inode_owner_or_capable(inode))
return -EPERM;
if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
if (ext4_has_metadata_csum(inode->i_sb)) {
ext4_warning(sb, "Setting inode version is not "
"supported with metadata_csum enabled.");
return -ENOTTY;
@ -532,9 +531,17 @@ group_add_out:
}
case EXT4_IOC_SWAP_BOOT:
{
int err;
if (!(filp->f_mode & FMODE_WRITE))
return -EBADF;
return swap_inode_boot_loader(sb, inode);
err = mnt_want_write_file(filp);
if (err)
return err;
err = swap_inode_boot_loader(sb, inode);
mnt_drop_write_file(filp);
return err;
}
case EXT4_IOC_RESIZE_FS: {
ext4_fsblk_t n_blocks_count;

15
fs/ext4/mballoc.c
View File

@ -3155,9 +3155,8 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
"start %lu, size %lu, fe_logical %lu",
(unsigned long) start, (unsigned long) size,
(unsigned long) ac->ac_o_ex.fe_logical);
BUG();
}
BUG_ON(start + size <= ac->ac_o_ex.fe_logical &&
start > ac->ac_o_ex.fe_logical);
BUG_ON(size <= 0 || size > EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
/* now prepare goal request */
@ -4410,14 +4409,7 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
if (IS_NOQUOTA(ar->inode))
ar->flags |= EXT4_MB_USE_ROOT_BLOCKS;
/*
* For delayed allocation, we could skip the ENOSPC and
* EDQUOT check, as blocks and quotas have been already
* reserved when data being copied into pagecache.
*/
if (ext4_test_inode_state(ar->inode, EXT4_STATE_DELALLOC_RESERVED))
ar->flags |= EXT4_MB_DELALLOC_RESERVED;
else {
if ((ar->flags & EXT4_MB_DELALLOC_RESERVED) == 0) {
/* Without delayed allocation we need to verify
* there is enough free blocks to do block allocation
* and verify allocation doesn't exceed the quota limits.
@ -4528,8 +4520,7 @@ out:
if (inquota && ar->len < inquota)
dquot_free_block(ar->inode, EXT4_C2B(sbi, inquota - ar->len));
if (!ar->len) {
if (!ext4_test_inode_state(ar->inode,
EXT4_STATE_DELALLOC_RESERVED))
if ((ar->flags & EXT4_MB_DELALLOC_RESERVED) == 0)
/* release all the reserved blocks if non delalloc */
percpu_counter_sub(&sbi->s_dirtyclusters_counter,
reserv_clstrs);

11
fs/ext4/migrate.c
View File

@ -41,8 +41,7 @@ static int finish_range(handle_t *handle, struct inode *inode,
ext4_ext_store_pblock(&newext, lb->first_pblock);
/* Locking only for convinience since we are operating on temp inode */
down_write(&EXT4_I(inode)->i_data_sem);
path = ext4_ext_find_extent(inode, lb->first_block, NULL, 0);
path = ext4_find_extent(inode, lb->first_block, NULL, 0);
if (IS_ERR(path)) {
retval = PTR_ERR(path);
path = NULL;
@ -81,13 +80,11 @@ static int finish_range(handle_t *handle, struct inode *inode,
goto err_out;
}
}
retval = ext4_ext_insert_extent(handle, inode, path, &newext, 0);
retval = ext4_ext_insert_extent(handle, inode, &path, &newext, 0);
err_out:
up_write((&EXT4_I(inode)->i_data_sem));
if (path) {
ext4_ext_drop_refs(path);
kfree(path);
}
ext4_ext_drop_refs(path);
kfree(path);
lb->first_pblock = 0;
return retval;
}

6
fs/ext4/mmp.c
View File

@ -20,8 +20,7 @@ static __le32 ext4_mmp_csum(struct super_block *sb, struct mmp_struct *mmp)
static int ext4_mmp_csum_verify(struct super_block *sb, struct mmp_struct *mmp)
{
if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(sb))
return 1;
return mmp->mmp_checksum == ext4_mmp_csum(sb, mmp);
@ -29,8 +28,7 @@ static int ext4_mmp_csum_verify(struct super_block *sb, struct mmp_struct *mmp)
static void ext4_mmp_csum_set(struct super_block *sb, struct mmp_struct *mmp)
{
if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(sb))
return;
mmp->mmp_checksum = ext4_mmp_csum(sb, mmp);

1066
fs/ext4/move_extent.c
View File

File diff suppressed because it is too large Load Diff

240
fs/ext4/namei.c
View File

@ -53,7 +53,7 @@ static struct buffer_head *ext4_append(handle_t *handle,
ext4_lblk_t *block)
{
struct buffer_head *bh;
int err = 0;
int err;
if (unlikely(EXT4_SB(inode->i_sb)->s_max_dir_size_kb &&
((inode->i_size >> 10) >=
@ -62,9 +62,9 @@ static struct buffer_head *ext4_append(handle_t *handle,
*block = inode->i_size >> inode->i_sb->s_blocksize_bits;
bh = ext4_bread(handle, inode, *block, 1, &err);
if (!bh)
return ERR_PTR(err);
bh = ext4_bread(handle, inode, *block, 1);
if (IS_ERR(bh))
return bh;
inode->i_size += inode->i_sb->s_blocksize;
EXT4_I(inode)->i_disksize = inode->i_size;
BUFFER_TRACE(bh, "get_write_access");
@ -94,20 +94,20 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode,
{
struct buffer_head *bh;
struct ext4_dir_entry *dirent;
int err = 0, is_dx_block = 0;
int is_dx_block = 0;
bh = ext4_bread(NULL, inode, block, 0, &err);
if (!bh) {
if (err == 0) {
ext4_error_inode(inode, __func__, line, block,
"Directory hole found");
return ERR_PTR(-EIO);
}
bh = ext4_bread(NULL, inode, block, 0);
if (IS_ERR(bh)) {
__ext4_warning(inode->i_sb, __func__, line,
"error reading directory block "
"(ino %lu, block %lu)", inode->i_ino,
"error %ld reading directory block "
"(ino %lu, block %lu)", PTR_ERR(bh), inode->i_ino,
(unsigned long) block);
return ERR_PTR(err);
return bh;
}
if (!bh) {
ext4_error_inode(inode, __func__, line, block, "Directory hole found");
return ERR_PTR(-EIO);
}
dirent = (struct ext4_dir_entry *) bh->b_data;
/* Determine whether or not we have an index block */
@ -124,8 +124,7 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode,
"directory leaf block found instead of index block");
return ERR_PTR(-EIO);
}
if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) ||
if (!ext4_has_metadata_csum(inode->i_sb) ||
buffer_verified(bh))
return bh;
@ -253,8 +252,7 @@ static unsigned dx_node_limit(struct inode *dir);
static struct dx_frame *dx_probe(const struct qstr *d_name,
struct inode *dir,
struct dx_hash_info *hinfo,
struct dx_frame *frame,
int *err);
struct dx_frame *frame);
static void dx_release(struct dx_frame *frames);
static int dx_make_map(struct ext4_dir_entry_2 *de, unsigned blocksize,
struct dx_hash_info *hinfo, struct dx_map_entry map[]);
@ -270,8 +268,7 @@ static int ext4_htree_next_block(struct inode *dir, __u32 hash,
__u32 *start_hash);
static struct buffer_head * ext4_dx_find_entry(struct inode *dir,
const struct qstr *d_name,
struct ext4_dir_entry_2 **res_dir,
int *err);
struct ext4_dir_entry_2 **res_dir);
static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
struct inode *inode);
@ -340,8 +337,7 @@ int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent)
{
struct ext4_dir_entry_tail *t;
if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(inode->i_sb))
return 1;
t = get_dirent_tail(inode, dirent);
@ -362,8 +358,7 @@ static void ext4_dirent_csum_set(struct inode *inode,
{
struct ext4_dir_entry_tail *t;
if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(inode->i_sb))
return;
t = get_dirent_tail(inode, dirent);
@ -438,8 +433,7 @@ static int ext4_dx_csum_verify(struct inode *inode,
struct dx_tail *t;
int count_offset, limit, count;
if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(inode->i_sb))
return 1;
c = get_dx_countlimit(inode, dirent, &count_offset);
@ -468,8 +462,7 @@ static void ext4_dx_csum_set(struct inode *inode, struct ext4_dir_entry *dirent)
struct dx_tail *t;
int count_offset, limit, count;
if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(inode->i_sb))
return;
c = get_dx_countlimit(inode, dirent, &count_offset);
@ -557,8 +550,7 @@ static inline unsigned dx_root_limit(struct inode *dir, unsigned infosize)
unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(1) -
EXT4_DIR_REC_LEN(2) - infosize;
if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (ext4_has_metadata_csum(dir->i_sb))
entry_space -= sizeof(struct dx_tail);
return entry_space / sizeof(struct dx_entry);
}
@ -567,8 +559,7 @@ static inline unsigned dx_node_limit(struct inode *dir)
{
unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(0);
if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (ext4_has_metadata_csum(dir->i_sb))
entry_space -= sizeof(struct dx_tail);
return entry_space / sizeof(struct dx_entry);
}
@ -641,7 +632,9 @@ struct stats dx_show_entries(struct dx_hash_info *hinfo, struct inode *dir,
u32 range = i < count - 1? (dx_get_hash(entries + 1) - hash): ~hash;
struct stats stats;
printk("%s%3u:%03u hash %8x/%8x ",levels?"":" ", i, block, hash, range);
if (!(bh = ext4_bread (NULL,dir, block, 0,&err))) continue;
bh = ext4_bread(NULL,dir, block, 0);
if (!bh || IS_ERR(bh))
continue;
stats = levels?
dx_show_entries(hinfo, dir, ((struct dx_node *) bh->b_data)->entries, levels - 1):
dx_show_leaf(hinfo, (struct ext4_dir_entry_2 *) bh->b_data, blocksize, 0);
@ -669,29 +662,25 @@ struct stats dx_show_entries(struct dx_hash_info *hinfo, struct inode *dir,
*/
static struct dx_frame *
dx_probe(const struct qstr *d_name, struct inode *dir,
struct dx_hash_info *hinfo, struct dx_frame *frame_in, int *err)
struct dx_hash_info *hinfo, struct dx_frame *frame_in)
{
unsigned count, indirect;
struct dx_entry *at, *entries, *p, *q, *m;
struct dx_root *root;
struct buffer_head *bh;
struct dx_frame *frame = frame_in;
struct dx_frame *ret_err = ERR_PTR(ERR_BAD_DX_DIR);
u32 hash;
frame->bh = NULL;
bh = ext4_read_dirblock(dir, 0, INDEX);
if (IS_ERR(bh)) {
*err = PTR_ERR(bh);
goto fail;
}
root = (struct dx_root *) bh->b_data;
frame->bh = ext4_read_dirblock(dir, 0, INDEX);
if (IS_ERR(frame->bh))
return (struct dx_frame *) frame->bh;
root = (struct dx_root *) frame->bh->b_data;
if (root->info.hash_version != DX_HASH_TEA &&
root->info.hash_version != DX_HASH_HALF_MD4 &&
root->info.hash_version != DX_HASH_LEGACY) {
ext4_warning(dir->i_sb, "Unrecognised inode hash code %d",
root->info.hash_version);
brelse(bh);
*err = ERR_BAD_DX_DIR;
goto fail;
}
hinfo->hash_version = root->info.hash_version;
@ -705,16 +694,12 @@ dx_probe(const struct qstr *d_name, struct inode *dir,
if (root->info.unused_flags & 1) {
ext4_warning(dir->i_sb, "Unimplemented inode hash flags: %#06x",
root->info.unused_flags);
brelse(bh);
*err = ERR_BAD_DX_DIR;
goto fail;
}
if ((indirect = root->info.indirect_levels) > 1) {
ext4_warning(dir->i_sb, "Unimplemented inode hash depth: %#06x",
root->info.indirect_levels);
brelse(bh);
*err = ERR_BAD_DX_DIR;
goto fail;
}
@ -724,27 +709,21 @@ dx_probe(const struct qstr *d_name, struct inode *dir,
if (dx_get_limit(entries) != dx_root_limit(dir,
root->info.info_length)) {
ext4_warning(dir->i_sb, "dx entry: limit != root limit");
brelse(bh);
*err = ERR_BAD_DX_DIR;
goto fail;
}
dxtrace(printk("Look up %x", hash));
while (1)
{
while (1) {
count = dx_get_count(entries);
if (!count || count > dx_get_limit(entries)) {
ext4_warning(dir->i_sb,
"dx entry: no count or count > limit");
brelse(bh);
*err = ERR_BAD_DX_DIR;
goto fail2;
goto fail;
}
p = entries + 1;
q = entries + count - 1;
while (p <= q)
{
while (p <= q) {
m = p + (q - p)/2;
dxtrace(printk("."));
if (dx_get_hash(m) > hash)
@ -753,8 +732,7 @@ dx_probe(const struct qstr *d_name, struct inode *dir,
p = m + 1;
}
if (0) // linear search cross check
{
if (0) { // linear search cross check
unsigned n = count - 1;
at = entries;
while (n--)
@ -771,38 +749,35 @@ dx_probe(const struct qstr *d_name, struct inode *dir,
at = p - 1;
dxtrace(printk(" %x->%u\n", at == entries? 0: dx_get_hash(at), dx_get_block(at)));
frame->bh = bh;
frame->entries = entries;
frame->at = at;
if (!indirect--) return frame;
bh = ext4_read_dirblock(dir, dx_get_block(at), INDEX);
if (IS_ERR(bh)) {
*err = PTR_ERR(bh);
goto fail2;
if (!indirect--)
return frame;
frame++;
frame->bh = ext4_read_dirblock(dir, dx_get_block(at), INDEX);
if (IS_ERR(frame->bh)) {
ret_err = (struct dx_frame *) frame->bh;
frame->bh = NULL;
goto fail;
}
entries = ((struct dx_node *) bh->b_data)->entries;
entries = ((struct dx_node *) frame->bh->b_data)->entries;
if (dx_get_limit(entries) != dx_node_limit (dir)) {
ext4_warning(dir->i_sb,
"dx entry: limit != node limit");
brelse(bh);
*err = ERR_BAD_DX_DIR;
goto fail2;
goto fail;
}
frame++;
frame->bh = NULL;
}
fail2:
fail:
while (frame >= frame_in) {
brelse(frame->bh);
frame--;
}
fail:
if (*err == ERR_BAD_DX_DIR)
if (ret_err == ERR_PTR(ERR_BAD_DX_DIR))
ext4_warning(dir->i_sb,
"Corrupt dir inode %lu, running e2fsck is "
"recommended.", dir->i_ino);
return NULL;
return ret_err;
}
static void dx_release (struct dx_frame *frames)
@ -988,9 +963,9 @@ int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
}
hinfo.hash = start_hash;
hinfo.minor_hash = 0;
frame = dx_probe(NULL, dir, &hinfo, frames, &err);
if (!frame)
return err;
frame = dx_probe(NULL, dir, &hinfo, frames);
if (IS_ERR(frame))
return PTR_ERR(frame);
/* Add '.' and '..' from the htree header */
if (!start_hash && !start_minor_hash) {
@ -1227,8 +1202,7 @@ static struct buffer_head * ext4_find_entry (struct inode *dir,
buffer */
int num = 0;
ext4_lblk_t nblocks;
int i, err = 0;
int namelen;
int i, namelen;
*res_dir = NULL;
sb = dir->i_sb;
@ -1258,17 +1232,13 @@ static struct buffer_head * ext4_find_entry (struct inode *dir,
goto restart;
}
if (is_dx(dir)) {
bh = ext4_dx_find_entry(dir, d_name, res_dir, &err);
bh = ext4_dx_find_entry(dir, d_name, res_dir);
/*
* On success, or if the error was file not found,
* return. Otherwise, fall back to doing a search the
* old fashioned way.
*/
if (err == -ENOENT)
return NULL;
if (err && err != ERR_BAD_DX_DIR)
return ERR_PTR(err);
if (bh)
if (!IS_ERR(bh) || PTR_ERR(bh) != ERR_BAD_DX_DIR)
return bh;
dxtrace(printk(KERN_DEBUG "ext4_find_entry: dx failed, "
"falling back\n"));
@ -1298,10 +1268,10 @@ restart:
break;
}
num++;
bh = ext4_getblk(NULL, dir, b++, 0, &err);
if (unlikely(err)) {
bh = ext4_getblk(NULL, dir, b++, 0);
if (unlikely(IS_ERR(bh))) {
if (ra_max == 0)
return ERR_PTR(err);
return bh;
break;
}
bh_use[ra_max] = bh;
@ -1366,7 +1336,7 @@ cleanup_and_exit:
}
static struct buffer_head * ext4_dx_find_entry(struct inode *dir, const struct qstr *d_name,
struct ext4_dir_entry_2 **res_dir, int *err)
struct ext4_dir_entry_2 **res_dir)
{
struct super_block * sb = dir->i_sb;
struct dx_hash_info hinfo;
@ -1375,25 +1345,23 @@ static struct buffer_head * ext4_dx_find_entry(struct inode *dir, const struct q
ext4_lblk_t block;
int retval;
if (!(frame = dx_probe(d_name, dir, &hinfo, frames, err)))
return NULL;
frame = dx_probe(d_name, dir, &hinfo, frames);
if (IS_ERR(frame))
return (struct buffer_head *) frame;
do {
block = dx_get_block(frame->at);
bh = ext4_read_dirblock(dir, block, DIRENT);
if (IS_ERR(bh)) {
*err = PTR_ERR(bh);
if (IS_ERR(bh))
goto errout;
}
retval = search_dirblock(bh, dir, d_name,
block << EXT4_BLOCK_SIZE_BITS(sb),
res_dir);
if (retval == 1) { /* Success! */
dx_release(frames);
return bh;
}
if (retval == 1)
goto success;
brelse(bh);
if (retval == -1) {
*err = ERR_BAD_DX_DIR;
bh = ERR_PTR(ERR_BAD_DX_DIR);
goto errout;
}
@ -1402,18 +1370,19 @@ static struct buffer_head * ext4_dx_find_entry(struct inode *dir, const struct q
frames, NULL);
if (retval < 0) {
ext4_warning(sb,
"error reading index page in directory #%lu",
dir->i_ino);
*err = retval;
"error %d reading index page in directory #%lu",
retval, dir->i_ino);
bh = ERR_PTR(retval);
goto errout;
}
} while (retval == 1);
*err = -ENOENT;
bh = NULL;
errout:
dxtrace(printk(KERN_DEBUG "%s not found\n", d_name->name));
dx_release (frames);
return NULL;
success:
dx_release(frames);
return bh;
}
static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
@ -1441,7 +1410,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
dentry);
return ERR_PTR(-EIO);
}
inode = ext4_iget(dir->i_sb, ino);
inode = ext4_iget_normal(dir->i_sb, ino);
if (inode == ERR_PTR(-ESTALE)) {
EXT4_ERROR_INODE(dir,
"deleted inode referenced: %u",
@ -1474,7 +1443,7 @@ struct dentry *ext4_get_parent(struct dentry *child)
return ERR_PTR(-EIO);
}
return d_obtain_alias(ext4_iget(child->d_inode->i_sb, ino));
return d_obtain_alias(ext4_iget_normal(child->d_inode->i_sb, ino));
}
/*
@ -1533,7 +1502,7 @@ static struct ext4_dir_entry_2* dx_pack_dirents(char *base, unsigned blocksize)
*/
static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
struct buffer_head **bh,struct dx_frame *frame,
struct dx_hash_info *hinfo, int *error)
struct dx_hash_info *hinfo)
{
unsigned blocksize = dir->i_sb->s_blocksize;
unsigned count, continued;
@ -1548,16 +1517,14 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
int csum_size = 0;
int err = 0, i;
if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (ext4_has_metadata_csum(dir->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
bh2 = ext4_append(handle, dir, &newblock);
if (IS_ERR(bh2)) {
brelse(*bh);
*bh = NULL;
*error = PTR_ERR(bh2);
return NULL;
return (struct ext4_dir_entry_2 *) bh2;
}
BUFFER_TRACE(*bh, "get_write_access");
@ -1617,8 +1584,7 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data2, blocksize, 1));
/* Which block gets the new entry? */
if (hinfo->hash >= hash2)
{
if (hinfo->hash >= hash2) {
swap(*bh, bh2);
de = de2;
}
@ -1638,8 +1604,7 @@ journal_error:
brelse(bh2);
*bh = NULL;
ext4_std_error(dir->i_sb, err);
*error = err;
return NULL;
return ERR_PTR(err);
}
int ext4_find_dest_de(struct inode *dir, struct inode *inode,
@ -1718,8 +1683,7 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
int csum_size = 0;
int err;
if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (ext4_has_metadata_csum(inode->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
if (!de) {
@ -1786,8 +1750,7 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
struct fake_dirent *fde;
int csum_size = 0;
if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (ext4_has_metadata_csum(inode->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
blocksize = dir->i_sb->s_blocksize;
@ -1862,8 +1825,8 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
ext4_handle_dirty_dx_node(handle, dir, frame->bh);
ext4_handle_dirty_dirent_node(handle, dir, bh);
de = do_split(handle,dir, &bh, frame, &hinfo, &retval);
if (!de) {
de = do_split(handle,dir, &bh, frame, &hinfo);
if (IS_ERR(de)) {
/*
* Even if the block split failed, we have to properly write
* out all the changes we did so far. Otherwise we can end up
@ -1871,7 +1834,7 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
*/
ext4_mark_inode_dirty(handle, dir);
dx_release(frames);
return retval;
return PTR_ERR(de);
}
dx_release(frames);
@ -1904,8 +1867,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
ext4_lblk_t block, blocks;
int csum_size = 0;
if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (ext4_has_metadata_csum(inode->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
sb = dir->i_sb;
@ -1982,9 +1944,9 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
struct ext4_dir_entry_2 *de;
int err;
frame = dx_probe(&dentry->d_name, dir, &hinfo, frames, &err);
if (!frame)
return err;
frame = dx_probe(&dentry->d_name, dir, &hinfo, frames);
if (IS_ERR(frame))
return PTR_ERR(frame);
entries = frame->entries;
at = frame->at;
bh = ext4_read_dirblock(dir, dx_get_block(frame->at), DIRENT);
@ -2095,9 +2057,11 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
goto cleanup;
}
}
de = do_split(handle, dir, &bh, frame, &hinfo, &err);
if (!de)
de = do_split(handle, dir, &bh, frame, &hinfo);
if (IS_ERR(de)) {
err = PTR_ERR(de);
goto cleanup;
}
err = add_dirent_to_buf(handle, dentry, inode, de, bh);
goto cleanup;
@ -2167,8 +2131,7 @@ static int ext4_delete_entry(handle_t *handle,
return err;
}
if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (ext4_has_metadata_csum(dir->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
BUFFER_TRACE(bh, "get_write_access");
@ -2387,8 +2350,7 @@ static int ext4_init_new_dir(handle_t *handle, struct inode *dir,
int csum_size = 0;
int err;
if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (ext4_has_metadata_csum(dir->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) {
@ -2403,10 +2365,6 @@ static int ext4_init_new_dir(handle_t *handle, struct inode *dir,
dir_block = ext4_append(handle, inode, &block);
if (IS_ERR(dir_block))
return PTR_ERR(dir_block);
BUFFER_TRACE(dir_block, "get_write_access");
err = ext4_journal_get_write_access(handle, dir_block);
if (err)
goto out;
de = (struct ext4_dir_entry_2 *)dir_block->b_data;
ext4_init_dot_dotdot(inode, de, blocksize, csum_size, dir->i_ino, 0);
set_nlink(inode, 2);
@ -2573,7 +2531,7 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode)
int err = 0, rc;
bool dirty = false;
if (!sbi->s_journal)
if (!sbi->s_journal || is_bad_inode(inode))
return 0;
WARN_ON_ONCE(!(inode->i_state & (I_NEW | I_FREEING)) &&

3
fs/ext4/resize.c
View File

@ -1212,8 +1212,7 @@ static int ext4_set_bitmap_checksums(struct super_block *sb,
{
struct buffer_head *bh;
if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(sb))
return 0;
bh = ext4_get_bitmap(sb, group_data->inode_bitmap);

245
fs/ext4/super.c
View File

@ -70,7 +70,6 @@ static void ext4_mark_recovery_complete(struct super_block *sb,
static void ext4_clear_journal_err(struct super_block *sb,
struct ext4_super_block *es);
static int ext4_sync_fs(struct super_block *sb, int wait);
static int ext4_sync_fs_nojournal(struct super_block *sb, int wait);
static int ext4_remount(struct super_block *sb, int *flags, char *data);
static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf);
static int ext4_unfreeze(struct super_block *sb);
@ -141,8 +140,7 @@ static __le32 ext4_superblock_csum(struct super_block *sb,
static int ext4_superblock_csum_verify(struct super_block *sb,
struct ext4_super_block *es)
{
if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(sb))
return 1;
return es->s_checksum == ext4_superblock_csum(sb, es);
@ -152,8 +150,7 @@ void ext4_superblock_csum_set(struct super_block *sb)
{
struct ext4_super_block *es = EXT4_SB(sb)->s_es;
if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(sb))
return;
es->s_checksum = ext4_superblock_csum(sb, es);
@ -820,10 +817,9 @@ static void ext4_put_super(struct super_block *sb)
percpu_counter_destroy(&sbi->s_freeinodes_counter);
percpu_counter_destroy(&sbi->s_dirs_counter);
percpu_counter_destroy(&sbi->s_dirtyclusters_counter);
percpu_counter_destroy(&sbi->s_extent_cache_cnt);
brelse(sbi->s_sbh);
#ifdef CONFIG_QUOTA
for (i = 0; i < MAXQUOTAS; i++)
for (i = 0; i < EXT4_MAXQUOTAS; i++)
kfree(sbi->s_qf_names[i]);
#endif
@ -885,6 +881,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
ext4_es_init_tree(&ei->i_es_tree);
rwlock_init(&ei->i_es_lock);
INIT_LIST_HEAD(&ei->i_es_lru);
ei->i_es_all_nr = 0;
ei->i_es_lru_nr = 0;
ei->i_touch_when = 0;
ei->i_reserved_data_blocks = 0;
@ -1002,7 +999,7 @@ static struct inode *ext4_nfs_get_inode(struct super_block *sb,
* Currently we don't know the generation for parent directory, so
* a generation of 0 means "accept any"
*/
inode = ext4_iget(sb, ino);
inode = ext4_iget_normal(sb, ino);
if (IS_ERR(inode))
return ERR_CAST(inode);
if (generation && inode->i_generation != generation) {
@ -1124,25 +1121,6 @@ static const struct super_operations ext4_sops = {
.bdev_try_to_free_page = bdev_try_to_free_page,
};
static const struct super_operations ext4_nojournal_sops = {
.alloc_inode = ext4_alloc_inode,
.destroy_inode = ext4_destroy_inode,
.write_inode = ext4_write_inode,
.dirty_inode = ext4_dirty_inode,
.drop_inode = ext4_drop_inode,
.evict_inode = ext4_evict_inode,
.sync_fs = ext4_sync_fs_nojournal,
.put_super = ext4_put_super,
.statfs = ext4_statfs,
.remount_fs = ext4_remount,
.show_options = ext4_show_options,
#ifdef CONFIG_QUOTA
.quota_read = ext4_quota_read,
.quota_write = ext4_quota_write,
#endif
.bdev_try_to_free_page = bdev_try_to_free_page,
};
static const struct export_operations ext4_export_ops = {
.fh_to_dentry = ext4_fh_to_dentry,
.fh_to_parent = ext4_fh_to_parent,
@ -1712,13 +1690,6 @@ static int parse_options(char *options, struct super_block *sb,
"not specified");
return 0;
}
} else {
if (sbi->s_jquota_fmt) {
ext4_msg(sb, KERN_ERR, "journaled quota format "
"specified with no journaling "
"enabled");
return 0;
}
}
#endif
if (test_opt(sb, DIOREAD_NOLOCK)) {
@ -2016,8 +1987,7 @@ static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group,
__u16 crc = 0;
__le32 le_group = cpu_to_le32(block_group);
if ((sbi->s_es->s_feature_ro_compat &
cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) {
if (ext4_has_metadata_csum(sbi->s_sb)) {
/* Use new metadata_csum algorithm */
__le16 save_csum;
__u32 csum32;
@ -2035,6 +2005,10 @@ static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group,
}
/* old crc16 code */
if (!(sbi->s_es->s_feature_ro_compat &
cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)))
return 0;
offset = offsetof(struct ext4_group_desc, bg_checksum);
crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid));
@ -2191,7 +2165,7 @@ static void ext4_orphan_cleanup(struct super_block *sb,
if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
/* don't clear list on RO mount w/ errors */
if (es->s_last_orphan && !(s_flags & MS_RDONLY)) {
jbd_debug(1, "Errors on filesystem, "
ext4_msg(sb, KERN_INFO, "Errors on filesystem, "
"clearing orphan list.\n");
es->s_last_orphan = 0;
}
@ -2207,7 +2181,7 @@ static void ext4_orphan_cleanup(struct super_block *sb,
/* Needed for iput() to work correctly and not trash data */
sb->s_flags |= MS_ACTIVE;
/* Turn on quotas so that they are updated correctly */
for (i = 0; i < MAXQUOTAS; i++) {
for (i = 0; i < EXT4_MAXQUOTAS; i++) {
if (EXT4_SB(sb)->s_qf_names[i]) {
int ret = ext4_quota_on_mount(sb, i);
if (ret < 0)
@ -2263,7 +2237,7 @@ static void ext4_orphan_cleanup(struct super_block *sb,
PLURAL(nr_truncates));
#ifdef CONFIG_QUOTA
/* Turn quotas off */
for (i = 0; i < MAXQUOTAS; i++) {
for (i = 0; i < EXT4_MAXQUOTAS; i++) {
if (sb_dqopt(sb)->files[i])
dquot_quota_off(sb, i);
}
@ -2548,6 +2522,16 @@ static ssize_t sbi_ui_store(struct ext4_attr *a,
return count;
}
static ssize_t es_ui_show(struct ext4_attr *a,
struct ext4_sb_info *sbi, char *buf)
{
unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) +
a->u.offset);
return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
}
static ssize_t reserved_clusters_show(struct ext4_attr *a,
struct ext4_sb_info *sbi, char *buf)
{
@ -2601,14 +2585,29 @@ static struct ext4_attr ext4_attr_##_name = { \
.offset = offsetof(struct ext4_sb_info, _elname),\
}, \
}
#define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \
static struct ext4_attr ext4_attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
.u = { \
.offset = offsetof(struct ext4_super_block, _elname), \
}, \
}
#define EXT4_ATTR(name, mode, show, store) \
static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store)
#define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL)
#define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL)
#define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store)
#define EXT4_RO_ATTR_ES_UI(name, elname) \
EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname)
#define EXT4_RW_ATTR_SBI_UI(name, elname) \
EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname)
#define ATTR_LIST(name) &ext4_attr_##name.attr
#define EXT4_DEPRECATED_ATTR(_name, _val) \
static struct ext4_attr ext4_attr_##_name = { \
@ -2641,6 +2640,9 @@ EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.int
EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst);
EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval);
EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst);
EXT4_RO_ATTR_ES_UI(errors_count, s_error_count);
EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time);
EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time);
static struct attribute *ext4_attrs[] = {
ATTR_LIST(delayed_allocation_blocks),
@ -2664,6 +2666,9 @@ static struct attribute *ext4_attrs[] = {
ATTR_LIST(warning_ratelimit_burst),
ATTR_LIST(msg_ratelimit_interval_ms),
ATTR_LIST(msg_ratelimit_burst),
ATTR_LIST(errors_count),
ATTR_LIST(first_error_time),
ATTR_LIST(last_error_time),
NULL,
};
@ -2723,9 +2728,25 @@ static void ext4_feat_release(struct kobject *kobj)
complete(&ext4_feat->f_kobj_unregister);
}
static ssize_t ext4_feat_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "supported\n");
}
/*
* We can not use ext4_attr_show/store because it relies on the kobject
* being embedded in the ext4_sb_info structure which is definitely not
* true in this case.
*/
static const struct sysfs_ops ext4_feat_ops = {
.show = ext4_feat_show,
.store = NULL,
};
static struct kobj_type ext4_feat_ktype = {
.default_attrs = ext4_feat_attrs,
.sysfs_ops = &ext4_attr_ops,
.sysfs_ops = &ext4_feat_ops,
.release = ext4_feat_release,
};
@ -3179,8 +3200,7 @@ static int set_journal_csum_feature_set(struct super_block *sb)
int compat, incompat;
struct ext4_sb_info *sbi = EXT4_SB(sb);
if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
if (ext4_has_metadata_csum(sb)) {
/* journal checksum v3 */
compat = 0;
incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3;
@ -3190,6 +3210,10 @@ static int set_journal_csum_feature_set(struct super_block *sb)
incompat = 0;
}
jbd2_journal_clear_features(sbi->s_journal,
JBD2_FEATURE_COMPAT_CHECKSUM, 0,
JBD2_FEATURE_INCOMPAT_CSUM_V3 |
JBD2_FEATURE_INCOMPAT_CSUM_V2);
if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
ret = jbd2_journal_set_features(sbi->s_journal,
compat, 0,
@ -3202,11 +3226,8 @@ static int set_journal_csum_feature_set(struct super_block *sb)
jbd2_journal_clear_features(sbi->s_journal, 0, 0,
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
} else {
jbd2_journal_clear_features(sbi->s_journal,
JBD2_FEATURE_COMPAT_CHECKSUM, 0,
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT |
JBD2_FEATURE_INCOMPAT_CSUM_V3 |
JBD2_FEATURE_INCOMPAT_CSUM_V2);
jbd2_journal_clear_features(sbi->s_journal, 0, 0,
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
}
return ret;
@ -3436,7 +3457,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
logical_sb_block = sb_block;
}
if (!(bh = sb_bread(sb, logical_sb_block))) {
if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) {
ext4_msg(sb, KERN_ERR, "unable to read superblock");
goto out_fail;
}
@ -3487,8 +3508,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
}
/* Precompute checksum seed for all metadata */
if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (ext4_has_metadata_csum(sb))
sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid,
sizeof(es->s_uuid));
@ -3519,8 +3539,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
set_opt(sb, ERRORS_CONT);
else
set_opt(sb, ERRORS_RO);
if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)
set_opt(sb, BLOCK_VALIDITY);
/* block_validity enabled by default; disable with noblock_validity */
set_opt(sb, BLOCK_VALIDITY);
if (def_mount_opts & EXT4_DEFM_DISCARD)
set_opt(sb, DISCARD);
@ -3646,7 +3666,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
brelse(bh);
logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE;
offset = do_div(logical_sb_block, blocksize);
bh = sb_bread(sb, logical_sb_block);
bh = sb_bread_unmovable(sb, logical_sb_block);
if (!bh) {
ext4_msg(sb, KERN_ERR,
"Can't read superblock on 2nd try");
@ -3868,7 +3888,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
for (i = 0; i < db_count; i++) {
block = descriptor_loc(sb, logical_sb_block, i);
sbi->s_group_desc[i] = sb_bread(sb, block);
sbi->s_group_desc[i] = sb_bread_unmovable(sb, block);
if (!sbi->s_group_desc[i]) {
ext4_msg(sb, KERN_ERR,
"can't read group descriptor %d", i);
@ -3890,13 +3910,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_err_report.data = (unsigned long) sb;
/* Register extent status tree shrinker */
ext4_es_register_shrinker(sbi);
err = percpu_counter_init(&sbi->s_extent_cache_cnt, 0, GFP_KERNEL);
if (err) {
ext4_msg(sb, KERN_ERR, "insufficient memory");
if (ext4_es_register_shrinker(sbi))
goto failed_mount3;
}
sbi->s_stripe = ext4_get_stripe_size(sbi);
sbi->s_extent_max_zeroout_kb = 32;
@ -3904,11 +3919,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
/*
* set up enough so that it can read an inode
*/
if (!test_opt(sb, NOLOAD) &&
EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL))
sb->s_op = &ext4_sops;
else
sb->s_op = &ext4_nojournal_sops;
sb->s_op = &ext4_sops;
sb->s_export_op = &ext4_export_ops;
sb->s_xattr = ext4_xattr_handlers;
#ifdef CONFIG_QUOTA
@ -4229,10 +4240,9 @@ failed_mount_wq:
jbd2_journal_destroy(sbi->s_journal);
sbi->s_journal = NULL;
}
failed_mount3:
ext4_es_unregister_shrinker(sbi);
failed_mount3:
del_timer_sync(&sbi->s_err_report);
percpu_counter_destroy(&sbi->s_extent_cache_cnt);
if (sbi->s_mmp_tsk)
kthread_stop(sbi->s_mmp_tsk);
failed_mount2:
@ -4247,7 +4257,7 @@ failed_mount:
remove_proc_entry(sb->s_id, ext4_proc_root);
}
#ifdef CONFIG_QUOTA
for (i = 0; i < MAXQUOTAS; i++)
for (i = 0; i < EXT4_MAXQUOTAS; i++)
kfree(sbi->s_qf_names[i]);
#endif
ext4_blkdev_remove(sbi);
@ -4375,6 +4385,15 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb,
goto out_bdev;
}
if ((le32_to_cpu(es->s_feature_ro_compat) &
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
es->s_checksum != ext4_superblock_csum(sb, es)) {
ext4_msg(sb, KERN_ERR, "external journal has "
"corrupt superblock");
brelse(bh);
goto out_bdev;
}
if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
ext4_msg(sb, KERN_ERR, "journal UUID does not match");
brelse(bh);
@ -4677,15 +4696,19 @@ static int ext4_sync_fs(struct super_block *sb, int wait)
* being sent at the end of the function. But we can skip it if
* transaction_commit will do it for us.
*/
target = jbd2_get_latest_transaction(sbi->s_journal);
if (wait && sbi->s_journal->j_flags & JBD2_BARRIER &&
!jbd2_trans_will_send_data_barrier(sbi->s_journal, target))
needs_barrier = true;
if (sbi->s_journal) {
target = jbd2_get_latest_transaction(sbi->s_journal);
if (wait && sbi->s_journal->j_flags & JBD2_BARRIER &&
!jbd2_trans_will_send_data_barrier(sbi->s_journal, target))
needs_barrier = true;
if (jbd2_journal_start_commit(sbi->s_journal, &target)) {
if (wait)
ret = jbd2_log_wait_commit(sbi->s_journal, target);
}
if (jbd2_journal_start_commit(sbi->s_journal, &target)) {
if (wait)
ret = jbd2_log_wait_commit(sbi->s_journal,
target);
}
} else if (wait && test_opt(sb, BARRIER))
needs_barrier = true;
if (needs_barrier) {
int err;
err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
@ -4696,19 +4719,6 @@ static int ext4_sync_fs(struct super_block *sb, int wait)
return ret;
}
static int ext4_sync_fs_nojournal(struct super_block *sb, int wait)
{
int ret = 0;
trace_ext4_sync_fs(sb, wait);
flush_workqueue(EXT4_SB(sb)->rsv_conversion_wq);
dquot_writeback_dquots(sb, -1);
if (wait && test_opt(sb, BARRIER))
ret = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
return ret;
}
/*
* LVM calls this function before a (read-only) snapshot is created. This
* gives us a chance to flush the journal completely and mark the fs clean.
@ -4727,23 +4737,26 @@ static int ext4_freeze(struct super_block *sb)
journal = EXT4_SB(sb)->s_journal;
/* Now we set up the journal barrier. */
jbd2_journal_lock_updates(journal);
if (journal) {
/* Now we set up the journal barrier. */
jbd2_journal_lock_updates(journal);
/*
* Don't clear the needs_recovery flag if we failed to flush
* the journal.
*/
error = jbd2_journal_flush(journal);
if (error < 0)
goto out;
/*
* Don't clear the needs_recovery flag if we failed to
* flush the journal.
*/
error = jbd2_journal_flush(journal);
if (error < 0)
goto out;
}
/* Journal blocked and flushed, clear needs_recovery flag. */
EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
error = ext4_commit_super(sb, 1);
out:
/* we rely on upper layer to stop further updates */
jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
if (journal)
/* we rely on upper layer to stop further updates */
jbd2_journal_unlock_updates(journal);
return error;
}
@ -4774,7 +4787,7 @@ struct ext4_mount_options {
u32 s_min_batch_time, s_max_batch_time;
#ifdef CONFIG_QUOTA
int s_jquota_fmt;
char *s_qf_names[MAXQUOTAS];
char *s_qf_names[EXT4_MAXQUOTAS];
#endif
};
@ -4804,7 +4817,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
old_opts.s_max_batch_time = sbi->s_max_batch_time;
#ifdef CONFIG_QUOTA
old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
for (i = 0; i < MAXQUOTAS; i++)
for (i = 0; i < EXT4_MAXQUOTAS; i++)
if (sbi->s_qf_names[i]) {
old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i],
GFP_KERNEL);
@ -4965,7 +4978,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
#ifdef CONFIG_QUOTA
/* Release old quota file names */
for (i = 0; i < MAXQUOTAS; i++)
for (i = 0; i < EXT4_MAXQUOTAS; i++)
kfree(old_opts.s_qf_names[i]);
if (enable_quota) {
if (sb_any_quota_suspended(sb))
@ -4994,7 +5007,7 @@ restore_opts:
sbi->s_max_batch_time = old_opts.s_max_batch_time;
#ifdef CONFIG_QUOTA
sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
for (i = 0; i < MAXQUOTAS; i++) {
for (i = 0; i < EXT4_MAXQUOTAS; i++) {
kfree(sbi->s_qf_names[i]);
sbi->s_qf_names[i] = old_opts.s_qf_names[i];
}
@ -5197,7 +5210,7 @@ static int ext4_quota_enable(struct super_block *sb, int type, int format_id,
{
int err;
struct inode *qf_inode;
unsigned long qf_inums[MAXQUOTAS] = {
unsigned long qf_inums[EXT4_MAXQUOTAS] = {
le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),
le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum)
};
@ -5225,13 +5238,13 @@ static int ext4_quota_enable(struct super_block *sb, int type, int format_id,
static int ext4_enable_quotas(struct super_block *sb)
{
int type, err = 0;
unsigned long qf_inums[MAXQUOTAS] = {
unsigned long qf_inums[EXT4_MAXQUOTAS] = {
le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),
le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum)
};
sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
for (type = 0; type < MAXQUOTAS; type++) {
for (type = 0; type < EXT4_MAXQUOTAS; type++) {
if (qf_inums[type]) {
err = ext4_quota_enable(sb, type, QFMT_VFS_V1,
DQUOT_USAGE_ENABLED);
@ -5309,7 +5322,6 @@ static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
{
struct inode *inode = sb_dqopt(sb)->files[type];
ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
int err = 0;
int offset = off & (sb->s_blocksize - 1);
int tocopy;
size_t toread;
@ -5324,9 +5336,9 @@ static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
while (toread > 0) {
tocopy = sb->s_blocksize - offset < toread ?
sb->s_blocksize - offset : toread;
bh = ext4_bread(NULL, inode, blk, 0, &err);
if (err)
return err;
bh = ext4_bread(NULL, inode, blk, 0);
if (IS_ERR(bh))
return PTR_ERR(bh);
if (!bh) /* A hole? */
memset(data, 0, tocopy);
else
@ -5347,8 +5359,7 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
{
struct inode *inode = sb_dqopt(sb)->files[type];
ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
int err = 0;
int offset = off & (sb->s_blocksize - 1);
int err, offset = off & (sb->s_blocksize - 1);
struct buffer_head *bh;
handle_t *handle = journal_current_handle();
@ -5369,14 +5380,16 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
return -EIO;
}
bh = ext4_bread(handle, inode, blk, 1, &err);
bh = ext4_bread(handle, inode, blk, 1);
if (IS_ERR(bh))
return PTR_ERR(bh);
if (!bh)
goto out;
BUFFER_TRACE(bh, "get write access");
err = ext4_journal_get_write_access(handle, bh);
if (err) {
brelse(bh);
goto out;
return err;
}
lock_buffer(bh);
memcpy(bh->b_data+offset, data, len);
@ -5385,8 +5398,6 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
err = ext4_handle_dirty_metadata(handle, NULL, bh);
brelse(bh);
out:
if (err)
return err;
if (inode->i_size < off + len) {
i_size_write(inode, off + len);
EXT4_I(inode)->i_disksize = inode->i_size;

44
fs/ext4/xattr.c
View File

@ -142,8 +142,7 @@ static int ext4_xattr_block_csum_verify(struct inode *inode,
sector_t block_nr,
struct ext4_xattr_header *hdr)
{
if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
if (ext4_has_metadata_csum(inode->i_sb) &&
(hdr->h_checksum != ext4_xattr_block_csum(inode, block_nr, hdr)))
return 0;
return 1;
@ -153,8 +152,7 @@ static void ext4_xattr_block_csum_set(struct inode *inode,
sector_t block_nr,
struct ext4_xattr_header *hdr)
{
if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
if (!ext4_has_metadata_csum(inode->i_sb))
return;
hdr->h_checksum = ext4_xattr_block_csum(inode, block_nr, hdr);
@ -190,14 +188,28 @@ ext4_listxattr(struct dentry *dentry, char *buffer, size_t size)
}
static int
ext4_xattr_check_names(struct ext4_xattr_entry *entry, void *end)
ext4_xattr_check_names(struct ext4_xattr_entry *entry, void *end,
void *value_start)
{
while (!IS_LAST_ENTRY(entry)) {
struct ext4_xattr_entry *next = EXT4_XATTR_NEXT(entry);
struct ext4_xattr_entry *e = entry;
while (!IS_LAST_ENTRY(e)) {
struct ext4_xattr_entry *next = EXT4_XATTR_NEXT(e);
if ((void *)next >= end)
return -EIO;
entry = next;
e = next;
}
while (!IS_LAST_ENTRY(entry)) {
if (entry->e_value_size != 0 &&
(value_start + le16_to_cpu(entry->e_value_offs) <
(void *)e + sizeof(__u32) ||
value_start + le16_to_cpu(entry->e_value_offs) +
le32_to_cpu(entry->e_value_size) > end))
return -EIO;
entry = EXT4_XATTR_NEXT(entry);
}
return 0;
}
@ -214,7 +226,8 @@ ext4_xattr_check_block(struct inode *inode, struct buffer_head *bh)
return -EIO;
if (!ext4_xattr_block_csum_verify(inode, bh->b_blocknr, BHDR(bh)))
return -EIO;
error = ext4_xattr_check_names(BFIRST(bh), bh->b_data + bh->b_size);
error = ext4_xattr_check_names(BFIRST(bh), bh->b_data + bh->b_size,
bh->b_data);
if (!error)
set_buffer_verified(bh);
return error;
@ -331,7 +344,7 @@ ext4_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
header = IHDR(inode, raw_inode);
entry = IFIRST(header);
end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
error = ext4_xattr_check_names(entry, end);
error = ext4_xattr_check_names(entry, end, entry);
if (error)
goto cleanup;
error = ext4_xattr_find_entry(&entry, name_index, name,
@ -463,7 +476,7 @@ ext4_xattr_ibody_list(struct dentry *dentry, char *buffer, size_t buffer_size)
raw_inode = ext4_raw_inode(&iloc);
header = IHDR(inode, raw_inode);
end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
error = ext4_xattr_check_names(IFIRST(header), end);
error = ext4_xattr_check_names(IFIRST(header), end, IFIRST(header));
if (error)
goto cleanup;
error = ext4_xattr_list_entries(dentry, IFIRST(header),
@ -899,14 +912,8 @@ inserted:
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
goal = goal & EXT4_MAX_BLOCK_FILE_PHYS;
/*
* take i_data_sem because we will test
* i_delalloc_reserved_flag in ext4_mb_new_blocks
*/
down_read(&EXT4_I(inode)->i_data_sem);
block = ext4_new_meta_blocks(handle, inode, goal, 0,
NULL, &error);
up_read((&EXT4_I(inode)->i_data_sem));
if (error)
goto cleanup;
@ -986,7 +993,8 @@ int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
is->s.here = is->s.first;
is->s.end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
if (ext4_test_inode_state(inode, EXT4_STATE_XATTR)) {
error = ext4_xattr_check_names(IFIRST(header), is->s.end);
error = ext4_xattr_check_names(IFIRST(header), is->s.end,
IFIRST(header));
if (error)
return error;
/* Find the named attribute. */

2
fs/jbd/journal.c
View File

@ -886,7 +886,7 @@ journal_t * journal_init_inode (struct inode *inode)
goto out_err;
}
bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
bh = getblk_unmovable(journal->j_dev, blocknr, journal->j_blocksize);
if (!bh) {
printk(KERN_ERR
"%s: Cannot get buffer for journal superblock\n",

338
fs/jbd2/checkpoint.c
View File

@ -96,15 +96,8 @@ static int __try_to_free_cp_buf(struct journal_head *jh)
if (jh->b_transaction == NULL && !buffer_locked(bh) &&
!buffer_dirty(bh) && !buffer_write_io_error(bh)) {
/*
* Get our reference so that bh cannot be freed before
* we unlock it
*/
get_bh(bh);
JBUFFER_TRACE(jh, "remove from checkpoint list");
ret = __jbd2_journal_remove_checkpoint(jh) + 1;
BUFFER_TRACE(bh, "release");
__brelse(bh);
}
return ret;
}
@ -122,8 +115,6 @@ void __jbd2_log_wait_for_space(journal_t *journal)
nblocks = jbd2_space_needed(journal);
while (jbd2_log_space_left(journal) < nblocks) {
if (journal->j_flags & JBD2_ABORT)
return;
write_unlock(&journal->j_state_lock);
mutex_lock(&journal->j_checkpoint_mutex);
@ -139,6 +130,10 @@ void __jbd2_log_wait_for_space(journal_t *journal)
* trace for forensic evidence.
*/
write_lock(&journal->j_state_lock);
if (journal->j_flags & JBD2_ABORT) {
mutex_unlock(&journal->j_checkpoint_mutex);
return;
}
spin_lock(&journal->j_list_lock);
nblocks = jbd2_space_needed(journal);
space_left = jbd2_log_space_left(journal);
@ -183,58 +178,6 @@ void __jbd2_log_wait_for_space(journal_t *journal)
}
}
/*
* Clean up transaction's list of buffers submitted for io.
* We wait for any pending IO to complete and remove any clean
* buffers. Note that we take the buffers in the opposite ordering
* from the one in which they were submitted for IO.
*
* Return 0 on success, and return <0 if some buffers have failed
* to be written out.
*
* Called with j_list_lock held.
*/
static int __wait_cp_io(journal_t *journal, transaction_t *transaction)
{
struct journal_head *jh;
struct buffer_head *bh;
tid_t this_tid;
int released = 0;
int ret = 0;
this_tid = transaction->t_tid;
restart:
/* Did somebody clean up the transaction in the meanwhile? */
if (journal->j_checkpoint_transactions != transaction ||
transaction->t_tid != this_tid)
return ret;
while (!released && transaction->t_checkpoint_io_list) {
jh = transaction->t_checkpoint_io_list;
bh = jh2bh(jh);
get_bh(bh);
if (buffer_locked(bh)) {
spin_unlock(&journal->j_list_lock);
wait_on_buffer(bh);
/* the journal_head may have gone by now */
BUFFER_TRACE(bh, "brelse");
__brelse(bh);
spin_lock(&journal->j_list_lock);
goto restart;
}
if (unlikely(buffer_write_io_error(bh)))
ret = -EIO;
/*
* Now in whatever state the buffer currently is, we know that
* it has been written out and so we can drop it from the list
*/
released = __jbd2_journal_remove_checkpoint(jh);
__brelse(bh);
}
return ret;
}
static void
__flush_batch(journal_t *journal, int *batch_count)
{
@ -254,81 +197,6 @@ __flush_batch(journal_t *journal, int *batch_count)
*batch_count = 0;
}
/*
* Try to flush one buffer from the checkpoint list to disk.
*
* Return 1 if something happened which requires us to abort the current
* scan of the checkpoint list. Return <0 if the buffer has failed to
* be written out.
*
* Called with j_list_lock held and drops it if 1 is returned
*/
static int __process_buffer(journal_t *journal, struct journal_head *jh,
int *batch_count, transaction_t *transaction)
{
struct buffer_head *bh = jh2bh(jh);
int ret = 0;
if (buffer_locked(bh)) {
get_bh(bh);
spin_unlock(&journal->j_list_lock);
wait_on_buffer(bh);
/* the journal_head may have gone by now */
BUFFER_TRACE(bh, "brelse");
__brelse(bh);
ret = 1;
} else if (jh->b_transaction != NULL) {
transaction_t *t = jh->b_transaction;
tid_t tid = t->t_tid;
transaction->t_chp_stats.cs_forced_to_close++;
spin_unlock(&journal->j_list_lock);
if (unlikely(journal->j_flags & JBD2_UNMOUNT))
/*
* The journal thread is dead; so starting and
* waiting for a commit to finish will cause
* us to wait for a _very_ long time.
*/
printk(KERN_ERR "JBD2: %s: "
"Waiting for Godot: block %llu\n",
journal->j_devname,
(unsigned long long) bh->b_blocknr);
jbd2_log_start_commit(journal, tid);
jbd2_log_wait_commit(journal, tid);
ret = 1;
} else if (!buffer_dirty(bh)) {
ret = 1;
if (unlikely(buffer_write_io_error(bh)))
ret = -EIO;
get_bh(bh);
BUFFER_TRACE(bh, "remove from checkpoint");
__jbd2_journal_remove_checkpoint(jh);
spin_unlock(&journal->j_list_lock);
__brelse(bh);
} else {
/*
* Important: we are about to write the buffer, and
* possibly block, while still holding the journal lock.
* We cannot afford to let the transaction logic start
* messing around with this buffer before we write it to
* disk, as that would break recoverability.
*/
BUFFER_TRACE(bh, "queue");
get_bh(bh);
J_ASSERT_BH(bh, !buffer_jwrite(bh));
journal->j_chkpt_bhs[*batch_count] = bh;
__buffer_relink_io(jh);
transaction->t_chp_stats.cs_written++;
(*batch_count)++;
if (*batch_count == JBD2_NR_BATCH) {
spin_unlock(&journal->j_list_lock);
__flush_batch(journal, batch_count);
ret = 1;
}
}
return ret;
}
/*
* Perform an actual checkpoint. We take the first transaction on the
* list of transactions to be checkpointed and send all its buffers
@ -339,9 +207,11 @@ static int __process_buffer(journal_t *journal, struct journal_head *jh,
*/
int jbd2_log_do_checkpoint(journal_t *journal)
{
transaction_t *transaction;
tid_t this_tid;
int result;
struct journal_head *jh;
struct buffer_head *bh;
transaction_t *transaction;
tid_t this_tid;
int result, batch_count = 0;
jbd_debug(1, "Start checkpoint\n");
@ -374,45 +244,117 @@ restart:
* done (maybe it's a new transaction, but it fell at the same
* address).
*/
if (journal->j_checkpoint_transactions == transaction &&
transaction->t_tid == this_tid) {
int batch_count = 0;
struct journal_head *jh;
int retry = 0, err;
if (journal->j_checkpoint_transactions != transaction ||
transaction->t_tid != this_tid)
goto out;
while (!retry && transaction->t_checkpoint_list) {
jh = transaction->t_checkpoint_list;
retry = __process_buffer(journal, jh, &batch_count,
transaction);
if (retry < 0 && !result)
result = retry;
if (!retry && (need_resched() ||
spin_needbreak(&journal->j_list_lock))) {
spin_unlock(&journal->j_list_lock);
retry = 1;
break;
}
/* checkpoint all of the transaction's buffers */
while (transaction->t_checkpoint_list) {
jh = transaction->t_checkpoint_list;
bh = jh2bh(jh);
if (buffer_locked(bh)) {
spin_unlock(&journal->j_list_lock);
get_bh(bh);
wait_on_buffer(bh);
/* the journal_head may have gone by now */
BUFFER_TRACE(bh, "brelse");
__brelse(bh);
goto retry;
}
if (jh->b_transaction != NULL) {
transaction_t *t = jh->b_transaction;
tid_t tid = t->t_tid;
if (batch_count) {
if (!retry) {
spin_unlock(&journal->j_list_lock);
retry = 1;
}
__flush_batch(journal, &batch_count);
transaction->t_chp_stats.cs_forced_to_close++;
spin_unlock(&journal->j_list_lock);
if (unlikely(journal->j_flags & JBD2_UNMOUNT))
/*
* The journal thread is dead; so
* starting and waiting for a commit
* to finish will cause us to wait for
* a _very_ long time.
*/
printk(KERN_ERR
"JBD2: %s: Waiting for Godot: block %llu\n",
journal->j_devname, (unsigned long long) bh->b_blocknr);
jbd2_log_start_commit(journal, tid);
jbd2_log_wait_commit(journal, tid);
goto retry;
}
if (retry) {
spin_lock(&journal->j_list_lock);
goto restart;
if (!buffer_dirty(bh)) {
if (unlikely(buffer_write_io_error(bh)) && !result)
result = -EIO;
BUFFER_TRACE(bh, "remove from checkpoint");
if (__jbd2_journal_remove_checkpoint(jh))
/* The transaction was released; we're done */
goto out;
continue;
}
/*
* Now we have cleaned up the first transaction's checkpoint
* list. Let's clean up the second one
* Important: we are about to write the buffer, and
* possibly block, while still holding the journal
* lock. We cannot afford to let the transaction
* logic start messing around with this buffer before
* we write it to disk, as that would break
* recoverability.
*/
err = __wait_cp_io(journal, transaction);
if (!result)
result = err;
BUFFER_TRACE(bh, "queue");
get_bh(bh);
J_ASSERT_BH(bh, !buffer_jwrite(bh));
journal->j_chkpt_bhs[batch_count++] = bh;
__buffer_relink_io(jh);
transaction->t_chp_stats.cs_written++;
if ((batch_count == JBD2_NR_BATCH) ||
need_resched() ||
spin_needbreak(&journal->j_list_lock))
goto unlock_and_flush;
}
if (batch_count) {
unlock_and_flush:
spin_unlock(&journal->j_list_lock);
retry:
if (batch_count)
__flush_batch(journal, &batch_count);
spin_lock(&journal->j_list_lock);
goto restart;
}
/*
* Now we issued all of the transaction's buffers, let's deal
* with the buffers that are out for I/O.
*/
restart2:
/* Did somebody clean up the transaction in the meanwhile? */
if (journal->j_checkpoint_transactions != transaction ||
transaction->t_tid != this_tid)
goto out;
while (transaction->t_checkpoint_io_list) {
jh = transaction->t_checkpoint_io_list;
bh = jh2bh(jh);
if (buffer_locked(bh)) {
spin_unlock(&journal->j_list_lock);
get_bh(bh);
wait_on_buffer(bh);
/* the journal_head may have gone by now */
BUFFER_TRACE(bh, "brelse");
__brelse(bh);
spin_lock(&journal->j_list_lock);
goto restart2;
}
if (unlikely(buffer_write_io_error(bh)) && !result)
result = -EIO;
/*
* Now in whatever state the buffer currently is, we
* know that it has been written out and so we can
* drop it from the list
*/
if (__jbd2_journal_remove_checkpoint(jh))
break;
}
out:
spin_unlock(&journal->j_list_lock);
@ -478,18 +420,16 @@ int jbd2_cleanup_journal_tail(journal_t *journal)
* Find all the written-back checkpoint buffers in the given list and
* release them.
*
* Called with the journal locked.
* Called with j_list_lock held.
* Returns number of buffers reaped (for debug)
* Returns 1 if we freed the transaction, 0 otherwise.
*/
static int journal_clean_one_cp_list(struct journal_head *jh, int *released)
static int journal_clean_one_cp_list(struct journal_head *jh)
{
struct journal_head *last_jh;
struct journal_head *next_jh = jh;
int ret, freed = 0;
int ret;
int freed = 0;
*released = 0;
if (!jh)
return 0;
@ -498,13 +438,11 @@ static int journal_clean_one_cp_list(struct journal_head *jh, int *released)
jh = next_jh;
next_jh = jh->b_cpnext;
ret = __try_to_free_cp_buf(jh);
if (ret) {
freed++;
if (ret == 2) {
*released = 1;
return freed;
}
}
if (!ret)
return freed;
if (ret == 2)
return 1;
freed = 1;
/*
* This function only frees up some memory
* if possible so we dont have an obligation
@ -523,49 +461,49 @@ static int journal_clean_one_cp_list(struct journal_head *jh, int *released)
*
* Find all the written-back checkpoint buffers in the journal and release them.
*
* Called with the journal locked.
* Called with j_list_lock held.
* Returns number of buffers reaped (for debug)
*/
int __jbd2_journal_clean_checkpoint_list(journal_t *journal)
void __jbd2_journal_clean_checkpoint_list(journal_t *journal)
{
transaction_t *transaction, *last_transaction, *next_transaction;
int ret = 0;
int released;
int ret;
transaction = journal->j_checkpoint_transactions;
if (!transaction)
goto out;
return;
last_transaction = transaction->t_cpprev;
next_transaction = transaction;
do {
transaction = next_transaction;
next_transaction = transaction->t_cpnext;
ret += journal_clean_one_cp_list(transaction->
t_checkpoint_list, &released);
ret = journal_clean_one_cp_list(transaction->t_checkpoint_list);
/*
* This function only frees up some memory if possible so we
* dont have an obligation to finish processing. Bail out if
* preemption requested:
*/
if (need_resched())
goto out;
if (released)
return;
if (ret)
continue;
/*
* It is essential that we are as careful as in the case of
* t_checkpoint_list with removing the buffer from the list as
* we can possibly see not yet submitted buffers on io_list
*/
ret += journal_clean_one_cp_list(transaction->
t_checkpoint_io_list, &released);
ret = journal_clean_one_cp_list(transaction->
t_checkpoint_io_list);
if (need_resched())
goto out;
return;
/*
* Stop scanning if we couldn't free the transaction. This
* avoids pointless scanning of transactions which still
* weren't checkpointed.
*/
if (!ret)
return;
} while (transaction != last_transaction);
out:
return ret;
}
/*

18
fs/jbd2/journal.c
View File

@ -1237,7 +1237,7 @@ journal_t * jbd2_journal_init_inode (struct inode *inode)
goto out_err;
}
bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
bh = getblk_unmovable(journal->j_dev, blocknr, journal->j_blocksize);
if (!bh) {
printk(KERN_ERR
"%s: Cannot get buffer for journal superblock\n",
@ -1522,14 +1522,6 @@ static int journal_get_superblock(journal_t *journal)
goto out;
}
if (jbd2_journal_has_csum_v2or3(journal) &&
JBD2_HAS_COMPAT_FEATURE(journal, JBD2_FEATURE_COMPAT_CHECKSUM)) {
/* Can't have checksum v1 and v2 on at the same time! */
printk(KERN_ERR "JBD2: Can't enable checksumming v1 and v2 "
"at the same time!\n");
goto out;
}
if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_CSUM_V2) &&
JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_CSUM_V3)) {
/* Can't have checksum v2 and v3 at the same time! */
@ -1538,6 +1530,14 @@ static int journal_get_superblock(journal_t *journal)
goto out;
}
if (jbd2_journal_has_csum_v2or3(journal) &&
JBD2_HAS_COMPAT_FEATURE(journal, JBD2_FEATURE_COMPAT_CHECKSUM)) {
/* Can't have checksum v1 and v2 on at the same time! */
printk(KERN_ERR "JBD2: Can't enable checksumming v1 and v2/3 "
"at the same time!\n");
goto out;
}
if (!jbd2_verify_csum_type(journal, sb)) {
printk(KERN_ERR "JBD2: Unknown checksum type\n");
goto out;

1
fs/jbd2/recovery.c
View File

@ -525,6 +525,7 @@ static int do_one_pass(journal_t *journal,
!jbd2_descr_block_csum_verify(journal,
bh->b_data)) {
err = -EIO;
brelse(bh);
goto failed;
}

47
include/linux/buffer_head.h
View File

@ -175,12 +175,13 @@ void __wait_on_buffer(struct buffer_head *);
wait_queue_head_t *bh_waitq_head(struct buffer_head *bh);
struct buffer_head *__find_get_block(struct block_device *bdev, sector_t block,
unsigned size);
struct buffer_head *__getblk(struct block_device *bdev, sector_t block,
unsigned size);
struct buffer_head *__getblk_gfp(struct block_device *bdev, sector_t block,
unsigned size, gfp_t gfp);
void __brelse(struct buffer_head *);
void __bforget(struct buffer_head *);
void __breadahead(struct block_device *, sector_t block, unsigned int size);
struct buffer_head *__bread(struct block_device *, sector_t block, unsigned size);
struct buffer_head *__bread_gfp(struct block_device *,
sector_t block, unsigned size, gfp_t gfp);
void invalidate_bh_lrus(void);
struct buffer_head *alloc_buffer_head(gfp_t gfp_flags);
void free_buffer_head(struct buffer_head * bh);
@ -295,7 +296,13 @@ static inline void bforget(struct buffer_head *bh)
static inline struct buffer_head *
sb_bread(struct super_block *sb, sector_t block)
{
return __bread(sb->s_bdev, block, sb->s_blocksize);
return __bread_gfp(sb->s_bdev, block, sb->s_blocksize, __GFP_MOVABLE);
}
static inline struct buffer_head *
sb_bread_unmovable(struct super_block *sb, sector_t block)
{
return __bread_gfp(sb->s_bdev, block, sb->s_blocksize, 0);
}
static inline void
@ -307,7 +314,7 @@ sb_breadahead(struct super_block *sb, sector_t block)
static inline struct buffer_head *
sb_getblk(struct super_block *sb, sector_t block)
{
return __getblk(sb->s_bdev, block, sb->s_blocksize);
return __getblk_gfp(sb->s_bdev, block, sb->s_blocksize, __GFP_MOVABLE);
}
static inline struct buffer_head *
@ -344,6 +351,36 @@ static inline void lock_buffer(struct buffer_head *bh)
__lock_buffer(bh);
}
static inline struct buffer_head *getblk_unmovable(struct block_device *bdev,
sector_t block,
unsigned size)
{
return __getblk_gfp(bdev, block, size, 0);
}
static inline struct buffer_head *__getblk(struct block_device *bdev,
sector_t block,
unsigned size)
{
return __getblk_gfp(bdev, block, size, __GFP_MOVABLE);
}
/**
* __bread() - reads a specified block and returns the bh
* @bdev: the block_device to read from
* @block: number of block
* @size: size (in bytes) to read
*
* Reads a specified block, and returns buffer head that contains it.
* The page cache is allocated from movable area so that it can be migrated.
* It returns NULL if the block was unreadable.
*/
static inline struct buffer_head *
__bread(struct block_device *bdev, sector_t block, unsigned size)
{
return __bread_gfp(bdev, block, size, __GFP_MOVABLE);
}
extern int __set_page_dirty_buffers(struct page *page);
#else /* CONFIG_BLOCK */

2
include/linux/jbd2.h
View File

@ -1042,7 +1042,7 @@ void jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block);
extern void jbd2_journal_commit_transaction(journal_t *);
/* Checkpoint list management */
int __jbd2_journal_clean_checkpoint_list(journal_t *journal);
void __jbd2_journal_clean_checkpoint_list(journal_t *journal);
int __jbd2_journal_remove_checkpoint(struct journal_head *);
void __jbd2_journal_insert_checkpoint(struct journal_head *, transaction_t *);

1
include/linux/mm.h
View File

@ -1176,6 +1176,7 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping,
extern void truncate_pagecache(struct inode *inode, loff_t new);
extern void truncate_setsize(struct inode *inode, loff_t newsize);
void pagecache_isize_extended(struct inode *inode, loff_t from, loff_t to);
void truncate_pagecache_range(struct inode *inode, loff_t offset, loff_t end);
int truncate_inode_page(struct address_space *mapping, struct page *page);
int generic_error_remove_page(struct address_space *mapping, struct page *page);

59
include/trace/events/ext4.h
View File

@ -2369,7 +2369,7 @@ TRACE_EVENT(ext4_es_lookup_extent_exit,
show_extent_status(__entry->found ? __entry->status : 0))
);
TRACE_EVENT(ext4_es_shrink_enter,
DECLARE_EVENT_CLASS(ext4__es_shrink_enter,
TP_PROTO(struct super_block *sb, int nr_to_scan, int cache_cnt),
TP_ARGS(sb, nr_to_scan, cache_cnt),
@ -2391,26 +2391,38 @@ TRACE_EVENT(ext4_es_shrink_enter,
__entry->nr_to_scan, __entry->cache_cnt)
);
TRACE_EVENT(ext4_es_shrink_exit,
TP_PROTO(struct super_block *sb, int shrunk_nr, int cache_cnt),
DEFINE_EVENT(ext4__es_shrink_enter, ext4_es_shrink_count,
TP_PROTO(struct super_block *sb, int nr_to_scan, int cache_cnt),
TP_ARGS(sb, shrunk_nr, cache_cnt),
TP_ARGS(sb, nr_to_scan, cache_cnt)
);
DEFINE_EVENT(ext4__es_shrink_enter, ext4_es_shrink_scan_enter,
TP_PROTO(struct super_block *sb, int nr_to_scan, int cache_cnt),
TP_ARGS(sb, nr_to_scan, cache_cnt)
);
TRACE_EVENT(ext4_es_shrink_scan_exit,
TP_PROTO(struct super_block *sb, int nr_shrunk, int cache_cnt),
TP_ARGS(sb, nr_shrunk, cache_cnt),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( int, shrunk_nr )
__field( int, nr_shrunk )
__field( int, cache_cnt )
),
TP_fast_assign(
__entry->dev = sb->s_dev;
__entry->shrunk_nr = shrunk_nr;
__entry->nr_shrunk = nr_shrunk;
__entry->cache_cnt = cache_cnt;
),
TP_printk("dev %d,%d shrunk_nr %d cache_cnt %d",
TP_printk("dev %d,%d nr_shrunk %d cache_cnt %d",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->shrunk_nr, __entry->cache_cnt)
__entry->nr_shrunk, __entry->cache_cnt)
);
TRACE_EVENT(ext4_collapse_range,
@ -2438,6 +2450,37 @@ TRACE_EVENT(ext4_collapse_range,
__entry->offset, __entry->len)
);
TRACE_EVENT(ext4_es_shrink,
TP_PROTO(struct super_block *sb, int nr_shrunk, u64 scan_time,
int skip_precached, int nr_skipped, int retried),
TP_ARGS(sb, nr_shrunk, scan_time, skip_precached, nr_skipped, retried),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( int, nr_shrunk )
__field( unsigned long long, scan_time )
__field( int, skip_precached )
__field( int, nr_skipped )
__field( int, retried )
),
TP_fast_assign(
__entry->dev = sb->s_dev;
__entry->nr_shrunk = nr_shrunk;
__entry->scan_time = div_u64(scan_time, 1000);
__entry->skip_precached = skip_precached;
__entry->nr_skipped = nr_skipped;
__entry->retried = retried;
),
TP_printk("dev %d,%d nr_shrunk %d, scan_time %llu skip_precached %d "
"nr_skipped %d retried %d",
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->nr_shrunk,
__entry->scan_time, __entry->skip_precached,
__entry->nr_skipped, __entry->retried)
);
#endif /* _TRACE_EXT4_H */
/* This part must be outside protection */

57
mm/truncate.c
View File

@ -20,6 +20,7 @@
#include <linux/buffer_head.h> /* grr. try_to_release_page,
do_invalidatepage */
#include <linux/cleancache.h>
#include <linux/rmap.h>
#include "internal.h"
static void clear_exceptional_entry(struct address_space *mapping,
@ -719,11 +720,67 @@ EXPORT_SYMBOL(truncate_pagecache);
*/
void truncate_setsize(struct inode *inode, loff_t newsize)
{
loff_t oldsize = inode->i_size;
i_size_write(inode, newsize);
if (newsize > oldsize)
pagecache_isize_extended(inode, oldsize, newsize);
truncate_pagecache(inode, newsize);
}
EXPORT_SYMBOL(truncate_setsize);
/**
* pagecache_isize_extended - update pagecache after extension of i_size
* @inode: inode for which i_size was extended
* @from: original inode size
* @to: new inode size
*
* Handle extension of inode size either caused by extending truncate or by
* write starting after current i_size. We mark the page straddling current
* i_size RO so that page_mkwrite() is called on the nearest write access to
* the page. This way filesystem can be sure that page_mkwrite() is called on
* the page before user writes to the page via mmap after the i_size has been
* changed.
*
* The function must be called after i_size is updated so that page fault
* coming after we unlock the page will already see the new i_size.
* The function must be called while we still hold i_mutex - this not only
* makes sure i_size is stable but also that userspace cannot observe new
* i_size value before we are prepared to store mmap writes at new inode size.
*/
void pagecache_isize_extended(struct inode *inode, loff_t from, loff_t to)
{
int bsize = 1 << inode->i_blkbits;
loff_t rounded_from;
struct page *page;
pgoff_t index;
WARN_ON(!mutex_is_locked(&inode->i_mutex));
WARN_ON(to > inode->i_size);
if (from >= to || bsize == PAGE_CACHE_SIZE)
return;
/* Page straddling @from will not have any hole block created? */
rounded_from = round_up(from, bsize);
if (to <= rounded_from || !(rounded_from & (PAGE_CACHE_SIZE - 1)))
return;
index = from >> PAGE_CACHE_SHIFT;
page = find_lock_page(inode->i_mapping, index);
/* Page not cached? Nothing to do */
if (!page)
return;
/*
* See clear_page_dirty_for_io() for details why set_page_dirty()
* is needed.
*/
if (page_mkclean(page))
set_page_dirty(page);
unlock_page(page);
page_cache_release(page);
}
EXPORT_SYMBOL(pagecache_isize_extended);
/**
* truncate_pagecache_range - unmap and remove pagecache that is hole-punched
* @inode: inode