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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-08 06:36:39 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-08 06:36:39 +0900
commit6432f2128414edbea5fd4f6c4fa4c28d0e1c6151 (patch)
treed3c63c5f2f043ce52d98d8dfd3c9c0a7bc76ed95 /fs
parentMerge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging (diff)
parentext4: fix ext4_flush_completed_IO wait semantics (diff)
downloadlinux-dev-6432f2128414edbea5fd4f6c4fa4c28d0e1c6151.tar.xz
linux-dev-6432f2128414edbea5fd4f6c4fa4c28d0e1c6151.zip
Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 updates from Ted Ts'o: "The big new feature added this time is supporting online resizing using the meta_bg feature. This allows us to resize file systems which are greater than 16TB. In addition, the speed of online resizing has been improved in general. We also fix a number of races, some of which could lead to deadlocks, in ext4's Asynchronous I/O and online defrag support, thanks to good work by Dmitry Monakhov. There are also a large number of more minor bug fixes and cleanups from a number of other ext4 contributors, quite of few of which have submitted fixes for the first time." * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (69 commits) ext4: fix ext4_flush_completed_IO wait semantics ext4: fix mtime update in nodelalloc mode ext4: fix ext_remove_space for punch_hole case ext4: punch_hole should wait for DIO writers ext4: serialize truncate with owerwrite DIO workers ext4: endless truncate due to nonlocked dio readers ext4: serialize unlocked dio reads with truncate ext4: serialize dio nonlocked reads with defrag workers ext4: completed_io locking cleanup ext4: fix unwritten counter leakage ext4: give i_aiodio_unwritten a more appropriate name ext4: ext4_inode_info diet ext4: convert to use leXX_add_cpu() ext4: ext4_bread usage audit fs: reserve fallocate flag codepoint ext4: remove redundant offset check in mext_check_arguments() ext4: don't clear orphan list on ro mount with errors jbd2: fix assertion failure in commit code due to lacking transaction credits ext4: release donor reference when EXT4_IOC_MOVE_EXT ioctl fails ext4: enable FITRIM ioctl on bigalloc file system ...
Diffstat (limited to 'fs')
-rw-r--r--fs/buffer.c13
-rw-r--r--fs/ext4/ext4.h49
-rw-r--r--fs/ext4/extents.c258
-rw-r--r--fs/ext4/file.c6
-rw-r--r--fs/ext4/fsync.c92
-rw-r--r--fs/ext4/ialloc.c9
-rw-r--r--fs/ext4/indirect.c18
-rw-r--r--fs/ext4/inode.c83
-rw-r--r--fs/ext4/ioctl.c22
-rw-r--r--fs/ext4/mballoc.c129
-rw-r--r--fs/ext4/mballoc.h5
-rw-r--r--fs/ext4/move_extent.c520
-rw-r--r--fs/ext4/namei.c105
-rw-r--r--fs/ext4/page-io.c176
-rw-r--r--fs/ext4/resize.c432
-rw-r--r--fs/ext4/super.c92
-rw-r--r--fs/fs-writeback.c1
-rw-r--r--fs/jbd2/commit.c40
-rw-r--r--fs/jbd2/journal.c5
-rw-r--r--fs/jbd2/recovery.c7
-rw-r--r--fs/jbd2/transaction.c65
-rw-r--r--fs/nilfs2/file.c1
22 files changed, 1353 insertions, 775 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index 58e2e7b77372..b5f044283edb 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2312,12 +2312,6 @@ int __block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
loff_t size;
int ret;
- /*
- * Update file times before taking page lock. We may end up failing the
- * fault so this update may be superfluous but who really cares...
- */
- file_update_time(vma->vm_file);
-
lock_page(page);
size = i_size_read(inode);
if ((page->mapping != inode->i_mapping) ||
@@ -2355,6 +2349,13 @@ int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
struct super_block *sb = vma->vm_file->f_path.dentry->d_inode->i_sb;
sb_start_pagefault(sb);
+
+ /*
+ * Update file times before taking page lock. We may end up failing the
+ * fault so this update may be superfluous but who really cares...
+ */
+ file_update_time(vma->vm_file);
+
ret = __block_page_mkwrite(vma, vmf, get_block);
sb_end_pagefault(sb);
return block_page_mkwrite_return(ret);
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index c3411d4ce2da..3ab2539b7b2e 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -186,7 +186,6 @@ struct mpage_da_data {
#define EXT4_IO_END_ERROR 0x0002
#define EXT4_IO_END_QUEUED 0x0004
#define EXT4_IO_END_DIRECT 0x0008
-#define EXT4_IO_END_IN_FSYNC 0x0010
struct ext4_io_page {
struct page *p_page;
@@ -912,9 +911,7 @@ struct ext4_inode_info {
struct list_head i_completed_io_list;
spinlock_t i_completed_io_lock;
atomic_t i_ioend_count; /* Number of outstanding io_end structs */
- /* current io_end structure for async DIO write*/
- ext4_io_end_t *cur_aio_dio;
- atomic_t i_aiodio_unwritten; /* Nr. of inflight conversions pending */
+ atomic_t i_unwritten; /* Nr. of inflight conversions pending */
spinlock_t i_block_reservation_lock;
@@ -1233,6 +1230,7 @@ struct ext4_sb_info {
spinlock_t s_md_lock;
unsigned short *s_mb_offsets;
unsigned int *s_mb_maxs;
+ unsigned int s_group_info_size;
/* tunables */
unsigned long s_stripe;
@@ -1243,6 +1241,7 @@ struct ext4_sb_info {
unsigned int s_mb_order2_reqs;
unsigned int s_mb_group_prealloc;
unsigned int s_max_writeback_mb_bump;
+ unsigned int s_max_dir_size_kb;
/* where last allocation was done - for stream allocation */
unsigned long s_mb_last_group;
unsigned long s_mb_last_start;
@@ -1270,8 +1269,12 @@ struct ext4_sb_info {
unsigned long s_sectors_written_start;
u64 s_kbytes_written;
+ /* the size of zero-out chunk */
+ unsigned int s_extent_max_zeroout_kb;
+
unsigned int s_log_groups_per_flex;
struct flex_groups *s_flex_groups;
+ ext4_group_t s_flex_groups_allocated;
/* workqueue for dio unwritten */
struct workqueue_struct *dio_unwritten_wq;
@@ -1328,10 +1331,20 @@ static inline void ext4_set_io_unwritten_flag(struct inode *inode,
{
if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) {
io_end->flag |= EXT4_IO_END_UNWRITTEN;
- atomic_inc(&EXT4_I(inode)->i_aiodio_unwritten);
+ atomic_inc(&EXT4_I(inode)->i_unwritten);
}
}
+static inline ext4_io_end_t *ext4_inode_aio(struct inode *inode)
+{
+ return inode->i_private;
+}
+
+static inline void ext4_inode_aio_set(struct inode *inode, ext4_io_end_t *io)
+{
+ inode->i_private = io;
+}
+
/*
* Inode dynamic state flags
*/
@@ -1345,6 +1358,8 @@ enum {
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 */
};
#define EXT4_INODE_BIT_FNS(name, field, offset) \
@@ -1932,7 +1947,7 @@ extern void ext4_htree_free_dir_info(struct dir_private_info *p);
/* fsync.c */
extern int ext4_sync_file(struct file *, loff_t, loff_t, int);
-extern int ext4_flush_completed_IO(struct inode *);
+extern int ext4_flush_unwritten_io(struct inode *);
/* hash.c */
extern int ext4fs_dirhash(const char *name, int len, struct
@@ -1966,6 +1981,8 @@ extern void ext4_exit_mballoc(void);
extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
struct buffer_head *bh, ext4_fsblk_t block,
unsigned long count, int flags);
+extern int ext4_mb_alloc_groupinfo(struct super_block *sb,
+ ext4_group_t ngroups);
extern int ext4_mb_add_groupinfo(struct super_block *sb,
ext4_group_t i, struct ext4_group_desc *desc);
extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
@@ -2051,6 +2068,8 @@ extern void ext4_superblock_csum_set(struct super_block *sb,
extern void *ext4_kvmalloc(size_t size, gfp_t flags);
extern void *ext4_kvzalloc(size_t size, gfp_t flags);
extern void ext4_kvfree(void *ptr);
+extern int ext4_alloc_flex_bg_array(struct super_block *sb,
+ ext4_group_t ngroup);
extern __printf(4, 5)
void __ext4_error(struct super_block *, const char *, unsigned int,
const char *, ...);
@@ -2352,6 +2371,7 @@ extern const struct file_operations ext4_dir_operations;
extern const struct inode_operations ext4_file_inode_operations;
extern const struct file_operations ext4_file_operations;
extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin);
+extern void ext4_unwritten_wait(struct inode *inode);
/* namei.c */
extern const struct inode_operations ext4_dir_inode_operations;
@@ -2400,11 +2420,11 @@ extern int ext4_move_extents(struct file *o_filp, struct file *d_filp,
/* page-io.c */
extern int __init ext4_init_pageio(void);
+extern void ext4_add_complete_io(ext4_io_end_t *io_end);
extern void ext4_exit_pageio(void);
extern void ext4_ioend_wait(struct inode *);
extern void ext4_free_io_end(ext4_io_end_t *io);
extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags);
-extern int ext4_end_io_nolock(ext4_io_end_t *io);
extern void ext4_io_submit(struct ext4_io_submit *io);
extern int ext4_bio_write_page(struct ext4_io_submit *io,
struct page *page,
@@ -2452,6 +2472,21 @@ static inline void set_bitmap_uptodate(struct buffer_head *bh)
set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state);
}
+/*
+ * Disable DIO read nolock optimization, so new dioreaders will be forced
+ * to grab i_mutex
+ */
+static inline void ext4_inode_block_unlocked_dio(struct inode *inode)
+{
+ ext4_set_inode_state(inode, EXT4_STATE_DIOREAD_LOCK);
+ smp_mb();
+}
+static inline void ext4_inode_resume_unlocked_dio(struct inode *inode)
+{
+ smp_mb();
+ ext4_clear_inode_state(inode, EXT4_STATE_DIOREAD_LOCK);
+}
+
#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
/* For ioend & aio unwritten conversion wait queues */
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index aabbb3f53683..1c94cca35ed1 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -1177,7 +1177,7 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode,
le32_to_cpu(EXT_FIRST_INDEX(neh)->ei_block),
ext4_idx_pblock(EXT_FIRST_INDEX(neh)));
- neh->eh_depth = cpu_to_le16(le16_to_cpu(neh->eh_depth) + 1);
+ le16_add_cpu(&neh->eh_depth, 1);
ext4_mark_inode_dirty(handle, inode);
out:
brelse(bh);
@@ -1656,16 +1656,60 @@ static int ext4_ext_try_to_merge_right(struct inode *inode,
}
/*
+ * This function does a very simple check to see if we can collapse
+ * an extent tree with a single extent tree leaf block into the inode.
+ */
+static void ext4_ext_try_to_merge_up(handle_t *handle,
+ struct inode *inode,
+ struct ext4_ext_path *path)
+{
+ size_t s;
+ unsigned max_root = ext4_ext_space_root(inode, 0);
+ ext4_fsblk_t blk;
+
+ if ((path[0].p_depth != 1) ||
+ (le16_to_cpu(path[0].p_hdr->eh_entries) != 1) ||
+ (le16_to_cpu(path[1].p_hdr->eh_entries) > max_root))
+ return;
+
+ /*
+ * We need to modify the block allocation bitmap and the block
+ * group descriptor to release the extent tree block. If we
+ * can't get the journal credits, give up.
+ */
+ if (ext4_journal_extend(handle, 2))
+ return;
+
+ /*
+ * Copy the extent data up to the inode
+ */
+ blk = ext4_idx_pblock(path[0].p_idx);
+ s = le16_to_cpu(path[1].p_hdr->eh_entries) *
+ sizeof(struct ext4_extent_idx);
+ s += sizeof(struct ext4_extent_header);
+
+ memcpy(path[0].p_hdr, path[1].p_hdr, s);
+ path[0].p_depth = 0;
+ path[0].p_ext = EXT_FIRST_EXTENT(path[0].p_hdr) +
+ (path[1].p_ext - EXT_FIRST_EXTENT(path[1].p_hdr));
+ path[0].p_hdr->eh_max = cpu_to_le16(max_root);
+
+ brelse(path[1].p_bh);
+ ext4_free_blocks(handle, inode, NULL, blk, 1,
+ EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET);
+}
+
+/*
* This function tries to merge the @ex extent to neighbours in the tree.
* return 1 if merge left else 0.
*/
-static int ext4_ext_try_to_merge(struct inode *inode,
+static void ext4_ext_try_to_merge(handle_t *handle,
+ struct inode *inode,
struct ext4_ext_path *path,
struct ext4_extent *ex) {
struct ext4_extent_header *eh;
unsigned int depth;
int merge_done = 0;
- int ret = 0;
depth = ext_depth(inode);
BUG_ON(path[depth].p_hdr == NULL);
@@ -1675,9 +1719,9 @@ static int ext4_ext_try_to_merge(struct inode *inode,
merge_done = ext4_ext_try_to_merge_right(inode, path, ex - 1);
if (!merge_done)
- ret = ext4_ext_try_to_merge_right(inode, path, ex);
+ (void) ext4_ext_try_to_merge_right(inode, path, ex);
- return ret;
+ ext4_ext_try_to_merge_up(handle, inode, path);
}
/*
@@ -1893,7 +1937,7 @@ has_space:
merge:
/* try to merge extents */
if (!(flag & EXT4_GET_BLOCKS_PRE_IO))
- ext4_ext_try_to_merge(inode, path, nearex);
+ ext4_ext_try_to_merge(handle, inode, path, nearex);
/* time to correct all indexes above */
@@ -1901,7 +1945,7 @@ merge:
if (err)
goto cleanup;
- err = ext4_ext_dirty(handle, inode, path + depth);
+ err = ext4_ext_dirty(handle, inode, path + path->p_depth);
cleanup:
if (npath) {
@@ -2092,13 +2136,10 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path,
}
/*
- * ext4_ext_check_cache()
+ * ext4_ext_in_cache()
* Checks to see if the given block is in the cache.
* If it is, the cached extent is stored in the given
- * cache extent pointer. If the cached extent is a hole,
- * this routine should be used instead of
- * ext4_ext_in_cache if the calling function needs to
- * know the size of the hole.
+ * cache extent pointer.
*
* @inode: The files inode
* @block: The block to look for in the cache
@@ -2107,8 +2148,10 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path,
*
* Return 0 if cache is invalid; 1 if the cache is valid
*/
-static int ext4_ext_check_cache(struct inode *inode, ext4_lblk_t block,
- struct ext4_ext_cache *ex){
+static int
+ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block,
+ struct ext4_extent *ex)
+{
struct ext4_ext_cache *cex;
struct ext4_sb_info *sbi;
int ret = 0;
@@ -2125,7 +2168,9 @@ static int ext4_ext_check_cache(struct inode *inode, ext4_lblk_t block,
goto errout;
if (in_range(block, cex->ec_block, cex->ec_len)) {
- memcpy(ex, cex, sizeof(struct ext4_ext_cache));
+ ex->ee_block = cpu_to_le32(cex->ec_block);
+ ext4_ext_store_pblock(ex, cex->ec_start);
+ ex->ee_len = cpu_to_le16(cex->ec_len);
ext_debug("%u cached by %u:%u:%llu\n",
block,
cex->ec_block, cex->ec_len, cex->ec_start);
@@ -2138,37 +2183,6 @@ errout:
}
/*
- * ext4_ext_in_cache()
- * Checks to see if the given block is in the cache.
- * If it is, the cached extent is stored in the given
- * extent pointer.
- *
- * @inode: The files inode
- * @block: The block to look for in the cache
- * @ex: Pointer where the cached extent will be stored
- * if it contains block
- *
- * Return 0 if cache is invalid; 1 if the cache is valid
- */
-static int
-ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block,
- struct ext4_extent *ex)
-{
- struct ext4_ext_cache cex;
- int ret = 0;
-
- if (ext4_ext_check_cache(inode, block, &cex)) {
- ex->ee_block = cpu_to_le32(cex.ec_block);
- ext4_ext_store_pblock(ex, cex.ec_start);
- ex->ee_len = cpu_to_le16(cex.ec_len);
- ret = 1;
- }
-
- return ret;
-}
-
-
-/*
* ext4_ext_rm_idx:
* removes index from the index block.
*/
@@ -2274,10 +2288,13 @@ static int ext4_remove_blocks(handle_t *handle, struct inode *inode,
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
unsigned short ee_len = ext4_ext_get_actual_len(ex);
ext4_fsblk_t pblk;
- int flags = EXT4_FREE_BLOCKS_FORGET;
+ int flags = 0;
if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
- flags |= EXT4_FREE_BLOCKS_METADATA;
+ flags |= EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET;
+ else if (ext4_should_journal_data(inode))
+ flags |= EXT4_FREE_BLOCKS_FORGET;
+
/*
* For bigalloc file systems, we never free a partial cluster
* at the beginning of the extent. Instead, we make a note
@@ -2572,7 +2589,7 @@ static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start,
struct ext4_ext_path *path = NULL;
ext4_fsblk_t partial_cluster = 0;
handle_t *handle;
- int i = 0, err;
+ int i = 0, err = 0;
ext_debug("truncate since %u to %u\n", start, end);
@@ -2604,12 +2621,16 @@ again:
return PTR_ERR(path);
}
depth = ext_depth(inode);
+ /* Leaf not may not exist only if inode has no blocks at all */
ex = path[depth].p_ext;
if (!ex) {
- ext4_ext_drop_refs(path);
- kfree(path);
- path = NULL;
- goto cont;
+ if (depth) {
+ EXT4_ERROR_INODE(inode,
+ "path[%d].p_hdr == NULL",
+ depth);
+ err = -EIO;
+ }
+ goto out;
}
ee_block = le32_to_cpu(ex->ee_block);
@@ -2641,8 +2662,6 @@ again:
goto out;
}
}
-cont:
-
/*
* We start scanning from right side, freeing all the blocks
* after i_size and walking into the tree depth-wise.
@@ -2924,9 +2943,9 @@ static int ext4_split_extent_at(handle_t *handle,
ext4_ext_mark_initialized(ex);
if (!(flags & EXT4_GET_BLOCKS_PRE_IO))
- ext4_ext_try_to_merge(inode, path, ex);
+ ext4_ext_try_to_merge(handle, inode, path, ex);
- err = ext4_ext_dirty(handle, inode, path + depth);
+ err = ext4_ext_dirty(handle, inode, path + path->p_depth);
goto out;
}
@@ -2958,8 +2977,8 @@ static int ext4_split_extent_at(handle_t *handle,
goto fix_extent_len;
/* update the extent length and mark as initialized */
ex->ee_len = cpu_to_le16(ee_len);
- ext4_ext_try_to_merge(inode, path, ex);
- err = ext4_ext_dirty(handle, inode, path + depth);
+ ext4_ext_try_to_merge(handle, inode, path, ex);
+ err = ext4_ext_dirty(handle, inode, path + path->p_depth);
goto out;
} else if (err)
goto fix_extent_len;
@@ -3041,7 +3060,6 @@ out:
return err ? err : map->m_len;
}
-#define EXT4_EXT_ZERO_LEN 7
/*
* This function is called by ext4_ext_map_blocks() if someone tries to write
* to an uninitialized extent. It may result in splitting the uninitialized
@@ -3067,13 +3085,14 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
struct ext4_map_blocks *map,
struct ext4_ext_path *path)
{
+ struct ext4_sb_info *sbi;
struct ext4_extent_header *eh;
struct ext4_map_blocks split_map;
struct ext4_extent zero_ex;
struct ext4_extent *ex;
ext4_lblk_t ee_block, eof_block;
unsigned int ee_len, depth;
- int allocated;
+ int allocated, max_zeroout = 0;
int err = 0;
int split_flag = 0;
@@ -3081,6 +3100,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
"block %llu, max_blocks %u\n", inode->i_ino,
(unsigned long long)map->m_lblk, map->m_len);
+ sbi = EXT4_SB(inode->i_sb);
eof_block = (inode->i_size + inode->i_sb->s_blocksize - 1) >>
inode->i_sb->s_blocksize_bits;
if (eof_block < map->m_lblk + map->m_len)
@@ -3180,9 +3200,12 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
*/
split_flag |= ee_block + ee_len <= eof_block ? EXT4_EXT_MAY_ZEROOUT : 0;
- /* If extent has less than 2*EXT4_EXT_ZERO_LEN zerout directly */
- if (ee_len <= 2*EXT4_EXT_ZERO_LEN &&
- (EXT4_EXT_MAY_ZEROOUT & split_flag)) {
+ if (EXT4_EXT_MAY_ZEROOUT & split_flag)
+ max_zeroout = sbi->s_extent_max_zeroout_kb >>
+ inode->i_sb->s_blocksize_bits;
+
+ /* If extent is less than s_max_zeroout_kb, zeroout directly */
+ if (max_zeroout && (ee_len <= max_zeroout)) {
err = ext4_ext_zeroout(inode, ex);
if (err)
goto out;
@@ -3191,8 +3214,8 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
if (err)
goto out;
ext4_ext_mark_initialized(ex);
- ext4_ext_try_to_merge(inode, path, ex);
- err = ext4_ext_dirty(handle, inode, path + depth);
+ ext4_ext_try_to_merge(handle, inode, path, ex);
+ err = ext4_ext_dirty(handle, inode, path + path->p_depth);
goto out;
}
@@ -3206,9 +3229,8 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
split_map.m_lblk = map->m_lblk;
split_map.m_len = map->m_len;
- if (allocated > map->m_len) {
- if (allocated <= EXT4_EXT_ZERO_LEN &&
- (EXT4_EXT_MAY_ZEROOUT & split_flag)) {
+ if (max_zeroout && (allocated > map->m_len)) {
+ if (allocated <= max_zeroout) {
/* case 3 */
zero_ex.ee_block =
cpu_to_le32(map->m_lblk);
@@ -3220,9 +3242,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
goto out;
split_map.m_lblk = map->m_lblk;
split_map.m_len = allocated;
- } else if ((map->m_lblk - ee_block + map->m_len <
- EXT4_EXT_ZERO_LEN) &&
- (EXT4_EXT_MAY_ZEROOUT & split_flag)) {
+ } else if (map->m_lblk - ee_block + map->m_len < max_zeroout) {
/* case 2 */
if (map->m_lblk != ee_block) {
zero_ex.ee_block = ex->ee_block;
@@ -3242,7 +3262,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
}
allocated = ext4_split_extent(handle, inode, path,
- &split_map, split_flag, 0);
+ &split_map, split_flag, 0);
if (allocated < 0)
err = allocated;
@@ -3256,7 +3276,7 @@ out:
* to an uninitialized extent.
*
* Writing to an uninitialized extent may result in splitting the uninitialized
- * extent into multiple /initialized uninitialized extents (up to three)
+ * extent into multiple initialized/uninitialized extents (up to three)
* There are three possibilities:
* a> There is no split required: Entire extent should be uninitialized
* b> Splits in two extents: Write is happening at either end of the extent
@@ -3333,10 +3353,10 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle,
/* note: ext4_ext_correct_indexes() isn't needed here because
* borders are not changed
*/
- ext4_ext_try_to_merge(inode, path, ex);
+ ext4_ext_try_to_merge(handle, inode, path, ex);
/* Mark modified extent as dirty */
- err = ext4_ext_dirty(handle, inode, path + depth);
+ err = ext4_ext_dirty(handle, inode, path + path->p_depth);
out:
ext4_ext_show_leaf(inode, path);
return err;
@@ -3600,7 +3620,7 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
{
int ret = 0;
int err = 0;
- ext4_io_end_t *io = EXT4_I(inode)->cur_aio_dio;
+ ext4_io_end_t *io = ext4_inode_aio(inode);
ext_debug("ext4_ext_handle_uninitialized_extents: inode %lu, logical "
"block %llu, max_blocks %u, flags %x, allocated %u\n",
@@ -3615,6 +3635,8 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
if ((flags & EXT4_GET_BLOCKS_PRE_IO)) {
ret = ext4_split_unwritten_extents(handle, inode, map,
path, flags);
+ if (ret <= 0)
+ goto out;
/*
* Flag the inode(non aio case) or end_io struct (aio case)
* that this IO needs to conversion to written when IO is
@@ -3858,8 +3880,9 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
unsigned int allocated = 0, offset = 0;
unsigned int allocated_clusters = 0;
struct ext4_allocation_request ar;
- ext4_io_end_t *io = EXT4_I(inode)->cur_aio_dio;
+ ext4_io_end_t *io = ext4_inode_aio(inode);
ext4_lblk_t cluster_offset;
+ int set_unwritten = 0;
ext_debug("blocks %u/%u requested for inode %lu\n",
map->m_lblk, map->m_len, inode->i_ino);
@@ -4082,13 +4105,8 @@ got_allocated_blocks:
* For non asycn direct IO case, flag the inode state
* that we need to perform conversion when IO is done.
*/
- if ((flags & EXT4_GET_BLOCKS_PRE_IO)) {
- if (io)
- ext4_set_io_unwritten_flag(inode, io);
- else
- ext4_set_inode_state(inode,
- EXT4_STATE_DIO_UNWRITTEN);
- }
+ if ((flags & EXT4_GET_BLOCKS_PRE_IO))
+ set_unwritten = 1;
if (ext4_should_dioread_nolock(inode))
map->m_flags |= EXT4_MAP_UNINIT;
}
@@ -4100,6 +4118,15 @@ got_allocated_blocks:
if (!err)
err = ext4_ext_insert_extent(handle, inode, path,
&newex, flags);
+
+ if (!err && set_unwritten) {
+ if (io)
+ ext4_set_io_unwritten_flag(inode, io);
+ else
+ ext4_set_inode_state(inode,
+ EXT4_STATE_DIO_UNWRITTEN);
+ }
+
if (err && free_on_err) {
int fb_flags = flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE ?
EXT4_FREE_BLOCKS_NO_QUOT_UPDATE : 0;
@@ -4241,7 +4268,7 @@ void ext4_ext_truncate(struct inode *inode)
* finish any pending end_io work so we won't run the risk of
* converting any truncated blocks to initialized later
*/
- ext4_flush_completed_IO(inode);
+ ext4_flush_unwritten_io(inode);
/*
* probably first extent we're gonna free will be last in block
@@ -4769,9 +4796,32 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length)
loff_t first_page_offset, last_page_offset;
int credits, err = 0;
+ /*
+ * Write out all dirty pages to avoid race conditions
+ * Then release them.
+ */
+ if (mapping->nrpages && mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) {
+ err = filemap_write_and_wait_range(mapping,
+ offset, offset + length - 1);
+
+ if (err)
+ return err;
+ }
+
+ mutex_lock(&inode->i_mutex);
+ /* It's not possible punch hole on append only file */
+ if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) {
+ err = -EPERM;
+ goto out_mutex;
+ }
+ if (IS_SWAPFILE(inode)) {
+ err = -ETXTBSY;
+ goto out_mutex;
+ }
+
/* No need to punch hole beyond i_size */
if (offset >= inode->i_size)
- return 0;
+ goto out_mutex;
/*
* If the hole extends beyond i_size, set the hole
@@ -4789,35 +4839,26 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length)
first_page_offset = first_page << PAGE_CACHE_SHIFT;
last_page_offset = last_page << PAGE_CACHE_SHIFT;
- /*
- * Write out all dirty pages to avoid race conditions
- * Then release them.
- */
- if (mapping->nrpages && mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) {
- err = filemap_write_and_wait_range(mapping,
- offset, offset + length - 1);
-
- if (err)
- return err;
- }
-
/* Now release the pages */
if (last_page_offset > first_page_offset) {
truncate_pagecache_range(inode, first_page_offset,
last_page_offset - 1);
}
- /* finish any pending end_io work */
- ext4_flush_completed_IO(inode);
+ /* Wait all existing dio workers, newcomers will block on i_mutex */
+ ext4_inode_block_unlocked_dio(inode);
+ err = ext4_flush_unwritten_io(inode);
+ if (err)
+ goto out_dio;
+ inode_dio_wait(inode);
credits = ext4_writepage_trans_blocks(inode);
handle = ext4_journal_start(inode, credits);
- if (IS_ERR(handle))
- return PTR_ERR(handle);
+ if (IS_ERR(handle)) {
+ err = PTR_ERR(handle);
+ goto out_dio;
+ }
- err = ext4_orphan_add(handle, inode);
- if (err)
- goto out;
/*
* Now we need to zero out the non-page-aligned data in the
@@ -4903,10 +4944,13 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length)
up_write(&EXT4_I(inode)->i_data_sem);
out:
- ext4_orphan_del(handle, inode);
inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
ext4_mark_inode_dirty(handle, inode);
ext4_journal_stop(handle);
+out_dio:
+ ext4_inode_resume_unlocked_dio(inode);
+out_mutex:
+ mutex_unlock(&inode->i_mutex);
return err;
}
int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 3b0e3bdaabfc..ca6f07afe601 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -55,11 +55,11 @@ static int ext4_release_file(struct inode *inode, struct file *filp)
return 0;
}
-static void ext4_aiodio_wait(struct inode *inode)
+void ext4_unwritten_wait(struct inode *inode)
{
wait_queue_head_t *wq = ext4_ioend_wq(inode);
- wait_event(*wq, (atomic_read(&EXT4_I(inode)->i_aiodio_unwritten) == 0));
+ wait_event(*wq, (atomic_read(&EXT4_I(inode)->i_unwritten) == 0));
}
/*
@@ -116,7 +116,7 @@ ext4_file_dio_write(struct kiocb *iocb, const struct iovec *iov,
"performance will be poor.",
inode->i_ino, current->comm);
mutex_lock(ext4_aio_mutex(inode));
- ext4_aiodio_wait(inode);
+ ext4_unwritten_wait(inode);
}
BUG_ON(iocb->ki_pos != pos);
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 2a1dcea4f12e..be1d89f385b4 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -34,87 +34,6 @@
#include <trace/events/ext4.h>
-static void dump_completed_IO(struct inode * inode)
-{
-#ifdef EXT4FS_DEBUG
- struct list_head *cur, *before, *after;
- ext4_io_end_t *io, *io0, *io1;
- unsigned long flags;
-
- if (list_empty(&EXT4_I(inode)->i_completed_io_list)){
- ext4_debug("inode %lu completed_io list is empty\n", inode->i_ino);
- return;
- }
-
- ext4_debug("Dump inode %lu completed_io list \n", inode->i_ino);
- spin_lock_irqsave(&EXT4_I(inode)->i_completed_io_lock, flags);
- list_for_each_entry(io, &EXT4_I(inode)->i_completed_io_list, list){
- cur = &io->list;
- before = cur->prev;
- io0 = container_of(before, ext4_io_end_t, list);
- after = cur->next;
- io1 = container_of(after, ext4_io_end_t, list);
-
- ext4_debug("io 0x%p from inode %lu,prev 0x%p,next 0x%p\n",
- io, inode->i_ino, io0, io1);
- }
- spin_unlock_irqrestore(&EXT4_I(inode)->i_completed_io_lock, flags);
-#endif
-}
-
-/*
- * This function is called from ext4_sync_file().
- *
- * When IO is completed, the work to convert unwritten extents to
- * written is queued on workqueue but may not get immediately
- * scheduled. When fsync is called, we need to ensure the
- * conversion is complete before fsync returns.
- * The inode keeps track of a list of pending/completed IO that
- * might needs to do the conversion. This function walks through
- * the list and convert the related unwritten extents for completed IO
- * to written.
- * The function return the number of pending IOs on success.
- */
-int ext4_flush_completed_IO(struct inode *inode)
-{
- ext4_io_end_t *io;
- struct ext4_inode_info *ei = EXT4_I(inode);
- unsigned long flags;
- int ret = 0;
- int ret2 = 0;
-
- dump_completed_IO(inode);
- spin_lock_irqsave(&ei->i_completed_io_lock, flags);
- while (!list_empty(&ei->i_completed_io_list)){
- io = list_entry(ei->i_completed_io_list.next,
- ext4_io_end_t, list);
- list_del_init(&io->list);
- io->flag |= EXT4_IO_END_IN_FSYNC;
- /*
- * Calling ext4_end_io_nolock() to convert completed
- * IO to written.
- *
- * When ext4_sync_file() is called, run_queue() may already
- * about to flush the work corresponding to this io structure.
- * It will be upset if it founds the io structure related
- * to the work-to-be schedule is freed.
- *
- * Thus we need to keep the io structure still valid here after
- * conversion finished. The io structure has a flag to
- * avoid double converting from both fsync and background work
- * queue work.
- */
- spin_unlock_irqrestore(&ei->i_completed_io_lock, flags);
- ret = ext4_end_io_nolock(io);
- if (ret < 0)
- ret2 = ret;
- spin_lock_irqsave(&ei->i_completed_io_lock, flags);
- io->flag &= ~EXT4_IO_END_IN_FSYNC;
- }
- spin_unlock_irqrestore(&ei->i_completed_io_lock, flags);
- return (ret2 < 0) ? ret2 : 0;
-}
-
/*
* If we're not journaling and this is a just-created file, we have to
* sync our parent directory (if it was freshly created) since
@@ -203,7 +122,7 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
struct inode *inode = file->f_mapping->host;
struct ext4_inode_info *ei = EXT4_I(inode);
journal_t *journal = EXT4_SB(inode->i_sb)->s_journal;
- int ret;
+ int ret, err;
tid_t commit_tid;
bool needs_barrier = false;
@@ -219,7 +138,7 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
if (inode->i_sb->s_flags & MS_RDONLY)
goto out;
- ret = ext4_flush_completed_IO(inode);
+ ret = ext4_flush_unwritten_io(inode);
if (ret < 0)
goto out;
@@ -255,8 +174,11 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
needs_barrier = true;
jbd2_log_start_commit(journal, commit_tid);
ret = jbd2_log_wait_commit(journal, commit_tid);
- if (needs_barrier)
- blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
+ if (needs_barrier) {
+ err = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
+ if (!ret)
+ ret = err;
+ }
out:
mutex_unlock(&inode->i_mutex);
trace_ext4_sync_file_exit(inode, ret);
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 26154b81b836..fa36372f3fdf 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -697,6 +697,15 @@ got_group:
if (!gdp)
goto fail;
+ /*
+ * Check free inodes count before loading bitmap.
+ */
+ if (ext4_free_inodes_count(sb, gdp) == 0) {
+ if (++group == ngroups)
+ group = 0;
+ continue;
+ }
+
brelse(inode_bitmap_bh);
inode_bitmap_bh = ext4_read_inode_bitmap(sb, group);
if (!inode_bitmap_bh)
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 830e1b2bf145..792e388e7b44 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -807,16 +807,30 @@ ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
retry:
if (rw == READ && ext4_should_dioread_nolock(inode)) {
- if (unlikely(!list_empty(&ei->i_completed_io_list))) {
+ if (unlikely(atomic_read(&EXT4_I(inode)->i_unwritten))) {
mutex_lock(&inode->i_mutex);
- ext4_flush_completed_IO(inode);
+ ext4_flush_unwritten_io(inode);
mutex_unlock(&inode->i_mutex);
}
+ /*
+ * Nolock dioread optimization may be dynamically disabled
+ * via ext4_inode_block_unlocked_dio(). Check inode's state
+ * while holding extra i_dio_count ref.
+ */
+ atomic_inc(&inode->i_dio_count);
+ smp_mb();
+ if (unlikely(ext4_test_inode_state(inode,
+ EXT4_STATE_DIOREAD_LOCK))) {
+ inode_dio_done(inode);
+ goto locked;
+ }
ret = __blockdev_direct_IO(rw, iocb, inode,
inode->i_sb->s_bdev, iov,
offset, nr_segs,
ext4_get_block, NULL, NULL, 0);
+ inode_dio_done(inode);
} else {
+locked:
ret = blockdev_direct_IO(rw, iocb, inode, iov,
offset, nr_segs, ext4_get_block);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index c862ee5fe79d..b3c243b9afa5 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -732,11 +732,13 @@ 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 (err < 0)
*errp = err;
if (err <= 0)
return NULL;
- *errp = 0;
bh = sb_getblk(inode->i_sb, map.m_pblk);
if (!bh) {
@@ -1954,9 +1956,6 @@ out:
return ret;
}
-static int ext4_set_bh_endio(struct buffer_head *bh, struct inode *inode);
-static void ext4_end_io_buffer_write(struct buffer_head *bh, int uptodate);
-
/*
* Note that we don't need to start a transaction unless we're journaling data
* because we should have holes filled from ext4_page_mkwrite(). We even don't
@@ -2463,6 +2462,16 @@ static int ext4_nonda_switch(struct super_block *sb)
free_blocks = EXT4_C2B(sbi,
percpu_counter_read_positive(&sbi->s_freeclusters_counter));
dirty_blocks = percpu_counter_read_positive(&sbi->s_dirtyclusters_counter);
+ /*
+ * Start pushing delalloc when 1/2 of free blocks are dirty.
+ */
+ if (dirty_blocks && (free_blocks < 2 * dirty_blocks) &&
+ !writeback_in_progress(sb->s_bdi) &&
+ down_read_trylock(&sb->s_umount)) {
+ writeback_inodes_sb(sb, WB_REASON_FS_FREE_SPACE);
+ up_read(&sb->s_umount);
+ }
+
if (2 * free_blocks < 3 * dirty_blocks ||
free_blocks < (dirty_blocks + EXT4_FREECLUSTERS_WATERMARK)) {
/*
@@ -2471,13 +2480,6 @@ static int ext4_nonda_switch(struct super_block *sb)
*/
return 1;
}
- /*
- * Even if we don't switch but are nearing capacity,
- * start pushing delalloc when 1/2 of free blocks are dirty.
- */
- if (free_blocks < 2 * dirty_blocks)
- writeback_inodes_sb_if_idle(sb, WB_REASON_FS_FREE_SPACE);
-
return 0;
}
@@ -2879,9 +2881,6 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
{
struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
ext4_io_end_t *io_end = iocb->private;
- struct workqueue_struct *wq;
- unsigned long flags;
- struct ext4_inode_info *ei;
/* if not async direct IO or dio with 0 bytes write, just return */
if (!io_end || !size)
@@ -2910,24 +2909,14 @@ out:
io_end->iocb = iocb;
io_end->result = ret;
}
- wq = EXT4_SB(io_end->inode->i_sb)->dio_unwritten_wq;
- /* Add the io_end to per-inode completed aio dio list*/
- ei = EXT4_I(io_end->inode);
- spin_lock_irqsave(&ei->i_completed_io_lock, flags);
- list_add_tail(&io_end->list, &ei->i_completed_io_list);
- spin_unlock_irqrestore(&ei->i_completed_io_lock, flags);
-
- /* queue the work to convert unwritten extents to written */
- queue_work(wq, &io_end->work);
+ ext4_add_complete_io(io_end);
}
static void ext4_end_io_buffer_write(struct buffer_head *bh, int uptodate)
{
ext4_io_end_t *io_end = bh->b_private;
- struct workqueue_struct *wq;
struct inode *inode;
- unsigned long flags;
if (!test_clear_buffer_uninit(bh) || !io_end)
goto out;
@@ -2946,15 +2935,7 @@ static void ext4_end_io_buffer_write(struct buffer_head *bh, int uptodate)
*/
inode = io_end->inode;
ext4_set_io_unwritten_flag(inode, io_end);
-
- /* Add the io_end to per-inode completed io list*/
- spin_lock_irqsave(&EXT4_I(inode)->i_completed_io_lock, flags);
- list_add_tail(&io_end->list, &EXT4_I(inode)->i_completed_io_list);
- spin_unlock_irqrestore(&EXT4_I(inode)->i_completed_io_lock, flags);
-
- wq = EXT4_SB(inode->i_sb)->dio_unwritten_wq;
- /* queue the work to convert unwritten extents to written */
- queue_work(wq, &io_end->work);
+ ext4_add_complete_io(io_end);
out:
bh->b_private = NULL;
bh->b_end_io = NULL;
@@ -3029,6 +3010,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
overwrite = *((int *)iocb->private);
if (overwrite) {
+ atomic_inc(&inode->i_dio_count);
down_read(&EXT4_I(inode)->i_data_sem);
mutex_unlock(&inode->i_mutex);
}
@@ -3054,7 +3036,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
* hook to the iocb.
*/
iocb->private = NULL;
- EXT4_I(inode)->cur_aio_dio = NULL;
+ ext4_inode_aio_set(inode, NULL);
if (!is_sync_kiocb(iocb)) {
ext4_io_end_t *io_end =
ext4_init_io_end(inode, GFP_NOFS);
@@ -3071,7 +3053,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
* is a unwritten extents needs to be converted
* when IO is completed.
*/
- EXT4_I(inode)->cur_aio_dio = iocb->private;
+ ext4_inode_aio_set(inode, io_end);
}
if (overwrite)
@@ -3091,7 +3073,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
NULL,
DIO_LOCKING);
if (iocb->private)
- EXT4_I(inode)->cur_aio_dio = NULL;
+ ext4_inode_aio_set(inode, NULL);
/*
* The io_end structure takes a reference to the inode,
* that structure needs to be destroyed and the
@@ -3126,6 +3108,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
retake_lock:
/* take i_mutex locking again if we do a ovewrite dio */
if (overwrite) {
+ inode_dio_done(inode);
up_read(&EXT4_I(inode)->i_data_sem);
mutex_lock(&inode->i_mutex);
}
@@ -4052,6 +4035,7 @@ static int ext4_do_update_inode(handle_t *handle,
struct ext4_inode_info *ei = EXT4_I(inode);
struct buffer_head *bh = iloc->bh;
int err = 0, rc, block;
+ int need_datasync = 0;
uid_t i_uid;
gid_t i_gid;
@@ -4102,7 +4086,10 @@ static int ext4_do_update_inode(handle_t *handle,
raw_inode->i_file_acl_high =
cpu_to_le16(ei->i_file_acl >> 32);
raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl);
- ext4_isize_set(raw_inode, ei->i_disksize);
+ if (ei->i_disksize != ext4_isize(raw_inode)) {
+ ext4_isize_set(raw_inode, ei->i_disksize);
+ need_datasync = 1;
+ }
if (ei->i_disksize > 0x7fffffffULL) {
struct super_block *sb = inode->i_sb;
if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
@@ -4155,7 +4142,7 @@ static int ext4_do_update_inode(handle_t *handle,
err = rc;
ext4_clear_inode_state(inode, EXT4_STATE_NEW);
- ext4_update_inode_fsync_trans(handle, inode, 0);
+ ext4_update_inode_fsync_trans(handle, inode, need_datasync);
out_brelse:
brelse(bh);
ext4_std_error(inode->i_sb, err);
@@ -4298,7 +4285,6 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
}
if (attr->ia_valid & ATTR_SIZE) {
- inode_dio_wait(inode);
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
@@ -4347,8 +4333,17 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
}
if (attr->ia_valid & ATTR_SIZE) {
- if (attr->ia_size != i_size_read(inode))
+ if (attr->ia_size != i_size_read(inode)) {
truncate_setsize(inode, attr->ia_size);
+ /* Inode size will be reduced, wait for dio in flight.
+ * Temporarily disable dioread_nolock to prevent
+ * livelock. */
+ if (orphan) {
+ ext4_inode_block_unlocked_dio(inode);
+ inode_dio_wait(inode);
+ ext4_inode_resume_unlocked_dio(inode);
+ }
+ }
ext4_truncate(inode);
}
@@ -4727,6 +4722,10 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
return err;
}
+ /* Wait for all existing dio workers */
+ ext4_inode_block_unlocked_dio(inode);
+ inode_dio_wait(inode);
+
jbd2_journal_lock_updates(journal);
/*
@@ -4746,6 +4745,7 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
ext4_set_aops(inode);
jbd2_journal_unlock_updates(journal);
+ ext4_inode_resume_unlocked_dio(inode);
/* Finally we can mark the inode as dirty. */
@@ -4780,6 +4780,7 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
int retries = 0;
sb_start_pagefault(inode->i_sb);
+ file_update_time(vma->vm_file);
/* Delalloc case is easy... */
if (test_opt(inode->i_sb, DELALLOC) &&
!ext4_should_journal_data(inode) &&
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 5439d6a56e99..5747f52f7c72 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -366,26 +366,11 @@ group_add_out:
return -EOPNOTSUPP;
}
- if (EXT4_HAS_INCOMPAT_FEATURE(sb,
- EXT4_FEATURE_INCOMPAT_META_BG)) {
- ext4_msg(sb, KERN_ERR,
- "Online resizing not (yet) supported with meta_bg");
- return -EOPNOTSUPP;
- }
-
if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
sizeof(__u64))) {
return -EFAULT;
}
- if (n_blocks_count > MAX_32_NUM &&
- !EXT4_HAS_INCOMPAT_FEATURE(sb,
- EXT4_FEATURE_INCOMPAT_64BIT)) {
- ext4_msg(sb, KERN_ERR,
- "File system only supports 32-bit block numbers");
- return -EOPNOTSUPP;
- }
-
err = ext4_resize_begin(sb);
if (err)
return err;
@@ -420,13 +405,6 @@ resizefs_out:
if (!blk_queue_discard(q))
return -EOPNOTSUPP;
- if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
- ext4_msg(sb, KERN_ERR,
- "FITRIM not supported with bigalloc");
- return -EOPNOTSUPP;
- }
-
if (copy_from_user(&range, (struct fstrim_range __user *)arg,
sizeof(range)))
return -EFAULT;
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 08778f6cdfe9..f8b27bf80aca 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -24,6 +24,7 @@
#include "ext4_jbd2.h"
#include "mballoc.h"
#include <linux/debugfs.h>
+#include <linux/log2.h>
#include <linux/slab.h>
#include <trace/events/ext4.h>
@@ -1338,17 +1339,17 @@ static void mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b,
mb_check_buddy(e4b);
}
-static int mb_find_extent(struct ext4_buddy *e4b, int order, int block,
+static int mb_find_extent(struct ext4_buddy *e4b, int block,
int needed, struct ext4_free_extent *ex)
{
int next = block;
- int max;
+ int max, order;
void *buddy;
assert_spin_locked(ext4_group_lock_ptr(e4b->bd_sb, e4b->bd_group));
BUG_ON(ex == NULL);
- buddy = mb_find_buddy(e4b, order, &max);
+ buddy = mb_find_buddy(e4b, 0, &max);
BUG_ON(buddy == NULL);
BUG_ON(block >= max);
if (mb_test_bit(block, buddy)) {
@@ -1358,12 +1359,9 @@ static int mb_find_extent(struct ext4_buddy *e4b, int order, int block,
return 0;
}
- /* FIXME dorp order completely ? */
- if (likely(order == 0)) {
- /* find actual order */
- order = mb_find_order_for_block(e4b, block);
- block = block >> order;
- }
+ /* find actual order */
+ order = mb_find_order_for_block(e4b, block);
+ block = block >> order;
ex->fe_len = 1 << order;
ex->fe_start = block << order;
@@ -1549,7 +1547,7 @@ static void ext4_mb_check_limits(struct ext4_allocation_context *ac,
/* recheck chunk's availability - we don't know
* when it was found (within this lock-unlock
* period or not) */
- max = mb_find_extent(e4b, 0, bex->fe_start, gex->fe_len, &ex);
+ max = mb_find_extent(e4b, bex->fe_start, gex->fe_len, &ex);
if (max >= gex->fe_len) {
ext4_mb_use_best_found(ac, e4b);
return;
@@ -1641,7 +1639,7 @@ int ext4_mb_try_best_found(struct ext4_allocation_context *ac,
return err;
ext4_lock_group(ac->ac_sb, group);
- max = mb_find_extent(e4b, 0, ex.fe_start, ex.fe_len, &ex);
+ max = mb_find_extent(e4b, ex.fe_start, ex.fe_len, &ex);
if (max > 0) {
ac->ac_b_ex = ex;
@@ -1662,17 +1660,20 @@ int ext4_mb_find_by_goal(struct ext4_allocation_context *ac,
int max;
int err;
struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb);
+ struct ext4_group_info *grp = ext4_get_group_info(ac->ac_sb, group);
struct ext4_free_extent ex;
if (!(ac->ac_flags & EXT4_MB_HINT_TRY_GOAL))
return 0;
+ if (grp->bb_free == 0)
+ return 0;
err = ext4_mb_load_buddy(ac->ac_sb, group, e4b);
if (err)
return err;
ext4_lock_group(ac->ac_sb, group);
- max = mb_find_extent(e4b, 0, ac->ac_g_ex.fe_start,
+ max = mb_find_extent(e4b, ac->ac_g_ex.fe_start,
ac->ac_g_ex.fe_len, &ex);
if (max >= ac->ac_g_ex.fe_len && ac->ac_g_ex.fe_len == sbi->s_stripe) {
@@ -1788,7 +1789,7 @@ void ext4_mb_complex_scan_group(struct ext4_allocation_context *ac,
break;
}
- mb_find_extent(e4b, 0, i, ac->ac_g_ex.fe_len, &ex);
+ mb_find_extent(e4b, i, ac->ac_g_ex.fe_len, &ex);
BUG_ON(ex.fe_len <= 0);
if (free < ex.fe_len) {
ext4_grp_locked_error(sb, e4b->bd_group, 0, 0,
@@ -1840,7 +1841,7 @@ void ext4_mb_scan_aligned(struct ext4_allocation_context *ac,
while (i < EXT4_CLUSTERS_PER_GROUP(sb)) {
if (!mb_test_bit(i, bitmap)) {
- max = mb_find_extent(e4b, 0, i, sbi->s_stripe, &ex);
+ max = mb_find_extent(e4b, i, sbi->s_stripe, &ex);
if (max >= sbi->s_stripe) {
ac->ac_found++;
ac->ac_b_ex = ex;
@@ -1862,6 +1863,12 @@ static int ext4_mb_good_group(struct ext4_allocation_context *ac,
BUG_ON(cr < 0 || cr >= 4);
+ free = grp->bb_free;
+ if (free == 0)
+ return 0;
+ if (cr <= 2 && free < ac->ac_g_ex.fe_len)
+ return 0;
+
/* We only do this if the grp has never been initialized */
if (unlikely(EXT4_MB_GRP_NEED_INIT(grp))) {
int ret = ext4_mb_init_group(ac->ac_sb, group);
@@ -1869,10 +1876,7 @@ static int ext4_mb_good_group(struct ext4_allocation_context *ac,
return 0;
}
- free = grp->bb_free;
fragments = grp->bb_fragments;
- if (free == 0)
- return 0;
if (fragments == 0)
return 0;
@@ -2163,6 +2167,39 @@ static struct kmem_cache *get_groupinfo_cache(int blocksize_bits)
return cachep;
}
+/*
+ * Allocate the top-level s_group_info array for the specified number
+ * of groups
+ */
+int ext4_mb_alloc_groupinfo(struct super_block *sb, ext4_group_t ngroups)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ unsigned size;
+ struct ext4_group_info ***new_groupinfo;
+
+ size = (ngroups + EXT4_DESC_PER_BLOCK(sb) - 1) >>
+ EXT4_DESC_PER_BLOCK_BITS(sb);
+ if (size <= sbi->s_group_info_size)
+ return 0;
+
+ size = roundup_pow_of_two(sizeof(*sbi->s_group_info) * size);
+ new_groupinfo = ext4_kvzalloc(size, GFP_KERNEL);
+ if (!new_groupinfo) {
+ ext4_msg(sb, KERN_ERR, "can't allocate buddy meta group");
+ return -ENOMEM;
+ }
+ if (sbi->s_group_info) {
+ memcpy(new_groupinfo, sbi->s_group_info,
+ sbi->s_group_info_size * sizeof(*sbi->s_group_info));
+ ext4_kvfree(sbi->s_group_info);
+ }
+ sbi->s_group_info = new_groupinfo;
+ sbi->s_group_info_size = size / sizeof(*sbi->s_group_info);
+ ext4_debug("allocated s_groupinfo array for %d meta_bg's\n",
+ sbi->s_group_info_size);
+ return 0;
+}
+
/* Create and initialize ext4_group_info data for the given group. */
int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t group,
struct ext4_group_desc *desc)
@@ -2195,12 +2232,11 @@ int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t group,
sbi->s_group_info[group >> EXT4_DESC_PER_BLOCK_BITS(sb)];
i = group & (EXT4_DESC_PER_BLOCK(sb) - 1);
- meta_group_info[i] = kmem_cache_alloc(cachep, GFP_KERNEL);
+ meta_group_info[i] = kmem_cache_zalloc(cachep, GFP_KERNEL);
if (meta_group_info[i] == NULL) {
ext4_msg(sb, KERN_ERR, "can't allocate buddy mem");
goto exit_group_info;
}
- memset(meta_group_info[i], 0, kmem_cache_size(cachep));
set_bit(EXT4_GROUP_INFO_NEED_INIT_BIT,
&(meta_group_info[i]->bb_state));
@@ -2252,49 +2288,14 @@ static int ext4_mb_init_backend(struct super_block *sb)
ext4_group_t ngroups = ext4_get_groups_count(sb);
ext4_group_t i;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- struct ext4_super_block *es = sbi->s_es;
- int num_meta_group_infos;
- int num_meta_group_infos_max;
- int array_size;
+ int err;
struct ext4_group_desc *desc;
struct kmem_cache *cachep;
- /* This is the number of blocks used by GDT */
- num_meta_group_infos = (ngroups + EXT4_DESC_PER_BLOCK(sb) -
- 1) >> EXT4_DESC_PER_BLOCK_BITS(sb);
-
- /*
- * This is the total number of blocks used by GDT including
- * the number of reserved blocks for GDT.
- * The s_group_info array is allocated with this value
- * to allow a clean online resize without a complex
- * manipulation of pointer.
- * The drawback is the unused memory when no resize
- * occurs but it's very low in terms of pages
- * (see comments below)
- * Need to handle this properly when META_BG resizing is allowed
- */
- num_meta_group_infos_max = num_meta_group_infos +
- le16_to_cpu(es->s_reserved_gdt_blocks);
+ err = ext4_mb_alloc_groupinfo(sb, ngroups);
+ if (err)
+ return err;
- /*
- * array_size is the size of s_group_info array. We round it
- * to the next power of two because this approximation is done
- * internally by kmalloc so we can have some more memory
- * for free here (e.g. may be used for META_BG resize).
- */
- array_size = 1;
- while (array_size < sizeof(*sbi->s_group_info) *
- num_meta_group_infos_max)
- array_size = array_size << 1;
- /* An 8TB filesystem with 64-bit pointers requires a 4096 byte
- * kmalloc. A 128kb malloc should suffice for a 256TB filesystem.
- * So a two level scheme suffices for now. */
- sbi->s_group_info = ext4_kvzalloc(array_size, GFP_KERNEL);
- if (sbi->s_group_info == NULL) {
- ext4_msg(sb, KERN_ERR, "can't allocate buddy meta group");
- return -ENOMEM;
- }
sbi->s_buddy_cache = new_inode(sb);
if (sbi->s_buddy_cache == NULL) {
ext4_msg(sb, KERN_ERR, "can't get new inode");
@@ -2322,7 +2323,7 @@ err_freebuddy:
cachep = get_groupinfo_cache(sb->s_blocksize_bits);
while (i-- > 0)
kmem_cache_free(cachep, ext4_get_group_info(sb, i));
- i = num_meta_group_infos;
+ i = sbi->s_group_info_size;
while (i-- > 0)
kfree(sbi->s_group_info[i]);
iput(sbi->s_buddy_cache);
@@ -4008,7 +4009,6 @@ ext4_mb_initialize_context(struct ext4_allocation_context *ac,
ext4_get_group_no_and_offset(sb, goal, &group, &block);
/* set up allocation goals */
- memset(ac, 0, sizeof(struct ext4_allocation_context));
ac->ac_b_ex.fe_logical = ar->logical & ~(sbi->s_cluster_ratio - 1);
ac->ac_status = AC_STATUS_CONTINUE;
ac->ac_sb = sb;
@@ -4291,7 +4291,7 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
}
}
- ac = kmem_cache_alloc(ext4_ac_cachep, GFP_NOFS);
+ ac = kmem_cache_zalloc(ext4_ac_cachep, GFP_NOFS);
if (!ac) {
ar->len = 0;
*errp = -ENOMEM;
@@ -4657,6 +4657,8 @@ do_more:
* with group lock held. generate_buddy look at
* them with group lock_held
*/
+ if (test_opt(sb, DISCARD))
+ ext4_issue_discard(sb, block_group, bit, count);
ext4_lock_group(sb, block_group);
mb_clear_bits(bitmap_bh->b_data, bit, count_clusters);
mb_free_blocks(inode, &e4b, bit, count_clusters);
@@ -4988,7 +4990,8 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
start = range->start >> sb->s_blocksize_bits;
end = start + (range->len >> sb->s_blocksize_bits) - 1;
- minlen = range->minlen >> sb->s_blocksize_bits;
+ minlen = EXT4_NUM_B2C(EXT4_SB(sb),
+ range->minlen >> sb->s_blocksize_bits);
if (unlikely(minlen > EXT4_CLUSTERS_PER_GROUP(sb)) ||
unlikely(start >= max_blks))
@@ -5048,6 +5051,6 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
atomic_set(&EXT4_SB(sb)->s_last_trim_minblks, minlen);
out:
- range->len = trimmed * sb->s_blocksize;
+ range->len = EXT4_C2B(EXT4_SB(sb), trimmed) << sb->s_blocksize_bits;
return ret;
}
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index c070618c21ce..3ccd889ba953 100644
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -65,11 +65,6 @@ extern u8 mb_enable_debug;
#define MB_DEFAULT_MIN_TO_SCAN 10
/*
- * How many groups mballoc will scan looking for the best chunk
- */
-#define MB_DEFAULT_MAX_GROUPS_TO_SCAN 5
-
-/*
* with 'ext4_mb_stats' allocator will collect stats that will be
* shown at umount. The collecting costs though!
*/
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index c5826c623e7a..292daeeed455 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -141,55 +141,21 @@ mext_next_extent(struct inode *inode, struct ext4_ext_path *path,
}
/**
- * mext_check_null_inode - NULL check for two inodes
- *
- * If inode1 or inode2 is NULL, return -EIO. Otherwise, return 0.
- */
-static int
-mext_check_null_inode(struct inode *inode1, struct inode *inode2,
- const char *function, unsigned int line)
-{
- int ret = 0;
-
- if (inode1 == NULL) {
- __ext4_error(inode2->i_sb, function, line,
- "Both inodes should not be NULL: "
- "inode1 NULL inode2 %lu", inode2->i_ino);
- ret = -EIO;
- } else if (inode2 == NULL) {
- __ext4_error(inode1->i_sb, function, line,
- "Both inodes should not be NULL: "
- "inode1 %lu inode2 NULL", inode1->i_ino);
- ret = -EIO;
- }
- return ret;
-}
-
-/**
* double_down_write_data_sem - Acquire two inodes' write lock of i_data_sem
*
- * @orig_inode: original inode structure
- * @donor_inode: donor inode structure
- * Acquire write lock of i_data_sem of the two inodes (orig and donor) by
- * i_ino order.
+ * Acquire write lock of i_data_sem of the two inodes
*/
static void
-double_down_write_data_sem(struct inode *orig_inode, struct inode *donor_inode)
+double_down_write_data_sem(struct inode *first, struct inode *second)
{
- struct inode *first = orig_inode, *second = donor_inode;
+ if (first < second) {
+ down_write(&EXT4_I(first)->i_data_sem);
+ down_write_nested(&EXT4_I(second)->i_data_sem, SINGLE_DEPTH_NESTING);
+ } else {
+ down_write(&EXT4_I(second)->i_data_sem);
+ down_write_nested(&EXT4_I(first)->i_data_sem, SINGLE_DEPTH_NESTING);
- /*
- * Use the inode number to provide the stable locking order instead
- * of its address, because the C language doesn't guarantee you can
- * compare pointers that don't come from the same array.
- */
- if (donor_inode->i_ino < orig_inode->i_ino) {
- first = donor_inode;
- second = orig_inode;
}
-
- down_write(&EXT4_I(first)->i_data_sem);
- down_write_nested(&EXT4_I(second)->i_data_sem, SINGLE_DEPTH_NESTING);
}
/**
@@ -604,9 +570,8 @@ mext_calc_swap_extents(struct ext4_extent *tmp_dext,
diff = donor_off - le32_to_cpu(tmp_dext->ee_block);
ext4_ext_store_pblock(tmp_dext, ext4_ext_pblock(tmp_dext) + diff);
- tmp_dext->ee_block =
- cpu_to_le32(le32_to_cpu(tmp_dext->ee_block) + diff);
- tmp_dext->ee_len = cpu_to_le16(le16_to_cpu(tmp_dext->ee_len) - diff);
+ le32_add_cpu(&tmp_dext->ee_block, diff);
+ le16_add_cpu(&tmp_dext->ee_len, -diff);
if (max_count < ext4_ext_get_actual_len(tmp_dext))
tmp_dext->ee_len = cpu_to_le16(max_count);
@@ -629,6 +594,43 @@ mext_calc_swap_extents(struct ext4_extent *tmp_dext,
}
/**
+ * mext_check_coverage - Check that all extents in range has the same type
+ *
+ * @inode: inode in question
+ * @from: block offset of inode
+ * @count: block count to be checked
+ * @uninit: extents expected to be uninitialized
+ * @err: pointer to save error value
+ *
+ * Return 1 if all extents in range has expected type, and zero otherwise.
+ */
+static int
+mext_check_coverage(struct inode *inode, ext4_lblk_t from, ext4_lblk_t count,
+ int uninit, int *err)
+{
+ struct ext4_ext_path *path = NULL;
+ struct ext4_extent *ext;
+ ext4_lblk_t last = from + count;
+ while (from < last) {
+ *err = get_ext_path(inode, from, &path);
+ if (*err)
+ return 0;
+ ext = path[ext_depth(inode)].p_ext;
+ if (!ext) {
+ ext4_ext_drop_refs(path);
+ return 0;
+ }
+ if (uninit != ext4_ext_is_uninitialized(ext)) {
+ ext4_ext_drop_refs(path);
+ return 0;
+ }
+ from += ext4_ext_get_actual_len(ext);
+ ext4_ext_drop_refs(path);
+ }
+ return 1;
+}
+
+/**
* mext_replace_branches - Replace original extents with new extents
*
* @handle: journal handle
@@ -663,9 +665,6 @@ mext_replace_branches(handle_t *handle, struct inode *orig_inode,
int replaced_count = 0;
int dext_alen;
- /* Protect extent trees against block allocations via delalloc */
- double_down_write_data_sem(orig_inode, donor_inode);
-
/* Get the original extent for the block "orig_off" */
*err = get_ext_path(orig_inode, orig_off, &orig_path);
if (*err)
@@ -764,12 +763,122 @@ out:
ext4_ext_invalidate_cache(orig_inode);
ext4_ext_invalidate_cache(donor_inode);
- double_up_write_data_sem(orig_inode, donor_inode);
-
return replaced_count;
}
/**
+ * mext_page_double_lock - Grab and lock pages on both @inode1 and @inode2
+ *
+ * @inode1: the inode structure
+ * @inode2: the inode structure
+ * @index: page index
+ * @page: result page vector
+ *
+ * Grab two locked pages for inode's by inode order
+ */
+static int
+mext_page_double_lock(struct inode *inode1, struct inode *inode2,
+ pgoff_t index, struct page *page[2])
+{
+ struct address_space *mapping[2];
+ unsigned fl = AOP_FLAG_NOFS;
+
+ BUG_ON(!inode1 || !inode2);
+ if (inode1 < inode2) {
+ mapping[0] = inode1->i_mapping;
+ mapping[1] = inode2->i_mapping;
+ } else {
+ mapping[0] = inode2->i_mapping;
+ mapping[1] = inode1->i_mapping;
+ }
+
+ page[0] = grab_cache_page_write_begin(mapping[0], index, fl);
+ if (!page[0])
+ return -ENOMEM;
+
+ page[1] = grab_cache_page_write_begin(mapping[1], index, fl);
+ if (!page[1]) {
+ unlock_page(page[0]);
+ page_cache_release(page[0]);
+ return -ENOMEM;
+ }
+
+ if (inode1 > inode2) {
+ struct page *tmp;
+ tmp = page[0];
+ page[0] = page[1];
+ page[1] = tmp;
+ }
+ return 0;
+}
+
+/* Force page buffers uptodate w/o dropping page's lock */
+static int
+mext_page_mkuptodate(struct page *page, unsigned from, unsigned to)
+{
+ struct inode *inode = page->mapping->host;
+ sector_t block;
+ struct buffer_head *bh, *head, *arr[MAX_BUF_PER_PAGE];
+ unsigned int blocksize, block_start, block_end;
+ int i, err, nr = 0, partial = 0;
+ BUG_ON(!PageLocked(page));
+ BUG_ON(PageWriteback(page));
+
+ if (PageUptodate(page))
+ return 0;
+
+ blocksize = 1 << inode->i_blkbits;
+ if (!page_has_buffers(page))
+ create_empty_buffers(page, blocksize, 0);
+
+ head = page_buffers(page);
+ block = (sector_t)page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ for (bh = head, block_start = 0; bh != head || !block_start;
+ block++, block_start = block_end, bh = bh->b_this_page) {
+ block_end = block_start + blocksize;
+ if (block_end <= from || block_start >= to) {
+ if (!buffer_uptodate(bh))
+ partial = 1;
+ continue;
+ }
+ if (buffer_uptodate(bh))
+ continue;
+ if (!buffer_mapped(bh)) {
+ int err = 0;
+ err = ext4_get_block(inode, block, bh, 0);
+ if (err) {
+ SetPageError(page);
+ return err;
+ }
+ if (!buffer_mapped(bh)) {
+ zero_user(page, block_start, blocksize);
+ if (!err)
+ set_buffer_uptodate(bh);
+ continue;
+ }
+ }
+ BUG_ON(nr >= MAX_BUF_PER_PAGE);
+ arr[nr++] = bh;
+ }
+ /* No io required */
+ if (!nr)
+ goto out;
+
+ for (i = 0; i < nr; i++) {
+ bh = arr[i];
+ if (!bh_uptodate_or_lock(bh)) {
+ err = bh_submit_read(bh);
+ if (err)
+ return err;
+ }
+ }
+out:
+ if (!partial)
+ SetPageUptodate(page);
+ return 0;
+}
+
+/**
* move_extent_per_page - Move extent data per page
*
* @o_filp: file structure of original file
@@ -791,26 +900,24 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
int block_len_in_page, int uninit, int *err)
{
struct inode *orig_inode = o_filp->f_dentry->d_inode;
- struct address_space *mapping = orig_inode->i_mapping;
- struct buffer_head *bh;
- struct page *page = NULL;
- const struct address_space_operations *a_ops = mapping->a_ops;
+ struct page *pagep[2] = {NULL, NULL};
handle_t *handle;
ext4_lblk_t orig_blk_offset;
long long offs = orig_page_offset << PAGE_CACHE_SHIFT;
unsigned long blocksize = orig_inode->i_sb->s_blocksize;
unsigned int w_flags = 0;
unsigned int tmp_data_size, data_size, replaced_size;
- void *fsdata;
- int i, jblocks;
- int err2 = 0;
+ int err2, jblocks, retries = 0;
int replaced_count = 0;
+ int from = data_offset_in_page << orig_inode->i_blkbits;
int blocks_per_page = PAGE_CACHE_SIZE >> orig_inode->i_blkbits;
/*
* It needs twice the amount of ordinary journal buffers because
* inode and donor_inode may change each different metadata blocks.
*/
+again:
+ *err = 0;
jblocks = ext4_writepage_trans_blocks(orig_inode) * 2;
handle = ext4_journal_start(orig_inode, jblocks);
if (IS_ERR(handle)) {
@@ -824,19 +931,6 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
orig_blk_offset = orig_page_offset * blocks_per_page +
data_offset_in_page;
- /*
- * If orig extent is uninitialized one,
- * it's not necessary force the page into memory
- * and then force it to be written out again.
- * Just swap data blocks between orig and donor.
- */
- if (uninit) {
- replaced_count = mext_replace_branches(handle, orig_inode,
- donor_inode, orig_blk_offset,
- block_len_in_page, err);
- goto out2;
- }
-
offs = (long long)orig_blk_offset << orig_inode->i_blkbits;
/* Calculate data_size */
@@ -858,75 +952,120 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
replaced_size = data_size;
- *err = a_ops->write_begin(o_filp, mapping, offs, data_size, w_flags,
- &page, &fsdata);
+ *err = mext_page_double_lock(orig_inode, donor_inode, orig_page_offset,
+ pagep);
if (unlikely(*err < 0))
- goto out;
-
- if (!PageUptodate(page)) {
- mapping->a_ops->readpage(o_filp, page);
- lock_page(page);
- }
-
+ goto stop_journal;
/*
- * try_to_release_page() doesn't call releasepage in writeback mode.
- * We should care about the order of writing to the same file
- * by multiple move extent processes.
- * It needs to call wait_on_page_writeback() to wait for the
- * writeback of the page.
+ * If orig extent was uninitialized it can become initialized
+ * at any time after i_data_sem was dropped, in order to
+ * serialize with delalloc we have recheck extent while we
+ * hold page's lock, if it is still the case data copy is not
+ * necessary, just swap data blocks between orig and donor.
*/
- wait_on_page_writeback(page);
+ if (uninit) {
+ double_down_write_data_sem(orig_inode, donor_inode);
+ /* If any of extents in range became initialized we have to
+ * fallback to data copying */
+ uninit = mext_check_coverage(orig_inode, orig_blk_offset,
+ block_len_in_page, 1, err);
+ if (*err)
+ goto drop_data_sem;
- /* Release old bh and drop refs */
- try_to_release_page(page, 0);
+ uninit &= mext_check_coverage(donor_inode, orig_blk_offset,
+ block_len_in_page, 1, err);
+ if (*err)
+ goto drop_data_sem;
+
+ if (!uninit) {
+ double_up_write_data_sem(orig_inode, donor_inode);
+ goto data_copy;
+ }
+ if ((page_has_private(pagep[0]) &&
+ !try_to_release_page(pagep[0], 0)) ||
+ (page_has_private(pagep[1]) &&
+ !try_to_release_page(pagep[1], 0))) {
+ *err = -EBUSY;
+ goto drop_data_sem;
+ }
+ replaced_count = mext_replace_branches(handle, orig_inode,
+ donor_inode, orig_blk_offset,
+ block_len_in_page, err);
+ drop_data_sem:
+ double_up_write_data_sem(orig_inode, donor_inode);
+ goto unlock_pages;
+ }
+data_copy:
+ *err = mext_page_mkuptodate(pagep[0], from, from + replaced_size);
+ if (*err)
+ goto unlock_pages;
+
+ /* At this point all buffers in range are uptodate, old mapping layout
+ * is no longer required, try to drop it now. */
+ if ((page_has_private(pagep[0]) && !try_to_release_page(pagep[0], 0)) ||
+ (page_has_private(pagep[1]) && !try_to_release_page(pagep[1], 0))) {
+ *err = -EBUSY;
+ goto unlock_pages;
+ }
replaced_count = mext_replace_branches(handle, orig_inode, donor_inode,
- orig_blk_offset, block_len_in_page,
- &err2);
- if (err2) {
+ orig_blk_offset,
+ block_len_in_page, err);
+ if (*err) {
if (replaced_count) {
block_len_in_page = replaced_count;
replaced_size =
block_len_in_page << orig_inode->i_blkbits;
} else
- goto out;
+ goto unlock_pages;
}
+ /* Perform all necessary steps similar write_begin()/write_end()
+ * but keeping in mind that i_size will not change */
+ *err = __block_write_begin(pagep[0], from, from + replaced_size,
+ ext4_get_block);
+ if (!*err)
+ *err = block_commit_write(pagep[0], from, from + replaced_size);
- if (!page_has_buffers(page))
- create_empty_buffers(page, 1 << orig_inode->i_blkbits, 0);
-
- bh = page_buffers(page);
- for (i = 0; i < data_offset_in_page; i++)
- bh = bh->b_this_page;
-
- for (i = 0; i < block_len_in_page; i++) {
- *err = ext4_get_block(orig_inode,
- (sector_t)(orig_blk_offset + i), bh, 0);
- if (*err < 0)
- goto out;
-
- if (bh->b_this_page != NULL)
- bh = bh->b_this_page;
- }
-
- *err = a_ops->write_end(o_filp, mapping, offs, data_size, replaced_size,
- page, fsdata);
- page = NULL;
-
-out:
- if (unlikely(page)) {
- if (PageLocked(page))
- unlock_page(page);
- page_cache_release(page);
- ext4_journal_stop(handle);
- }
-out2:
+ if (unlikely(*err < 0))
+ goto repair_branches;
+
+ /* Even in case of data=writeback it is reasonable to pin
+ * inode to transaction, to prevent unexpected data loss */
+ *err = ext4_jbd2_file_inode(handle, orig_inode);
+
+unlock_pages:
+ unlock_page(pagep[0]);
+ page_cache_release(pagep[0]);
+ unlock_page(pagep[1]);
+ page_cache_release(pagep[1]);
+stop_journal:
ext4_journal_stop(handle);
-
- if (err2)
- *err = err2;
-
+ /* Buffer was busy because probably is pinned to journal transaction,
+ * force transaction commit may help to free it. */
+ if (*err == -EBUSY && ext4_should_retry_alloc(orig_inode->i_sb,
+ &retries))
+ goto again;
return replaced_count;
+
+repair_branches:
+ /*
+ * This should never ever happen!
+ * Extents are swapped already, but we are not able to copy data.
+ * Try to swap extents to it's original places
+ */
+ double_down_write_data_sem(orig_inode, donor_inode);
+ replaced_count = mext_replace_branches(handle, donor_inode, orig_inode,
+ orig_blk_offset,
+ block_len_in_page, &err2);
+ double_up_write_data_sem(orig_inode, donor_inode);
+ if (replaced_count != block_len_in_page) {
+ EXT4_ERROR_INODE_BLOCK(orig_inode, (sector_t)(orig_blk_offset),
+ "Unable to copy data block,"
+ " data will be lost.");
+ *err = -EIO;
+ }
+ replaced_count = 0;
+ goto unlock_pages;
}
/**
@@ -969,14 +1108,6 @@ mext_check_arguments(struct inode *orig_inode,
return -EINVAL;
}
- /* Files should be in the same ext4 FS */
- if (orig_inode->i_sb != donor_inode->i_sb) {
- ext4_debug("ext4 move extent: The argument files "
- "should be in same FS [ino:orig %lu, donor %lu]\n",
- orig_inode->i_ino, donor_inode->i_ino);
- return -EINVAL;
- }
-
/* Ext4 move extent supports only extent based file */
if (!(ext4_test_inode_flag(orig_inode, EXT4_INODE_EXTENTS))) {
ext4_debug("ext4 move extent: orig file is not extents "
@@ -1002,7 +1133,6 @@ mext_check_arguments(struct inode *orig_inode,
}
if ((orig_start >= EXT_MAX_BLOCKS) ||
- (donor_start >= EXT_MAX_BLOCKS) ||
(*len > EXT_MAX_BLOCKS) ||
(orig_start + *len >= EXT_MAX_BLOCKS)) {
ext4_debug("ext4 move extent: Can't handle over [%u] blocks "
@@ -1072,35 +1202,19 @@ mext_check_arguments(struct inode *orig_inode,
* @inode1: the inode structure
* @inode2: the inode structure
*
- * Lock two inodes' i_mutex by i_ino order.
- * If inode1 or inode2 is NULL, return -EIO. Otherwise, return 0.
+ * Lock two inodes' i_mutex
*/
-static int
+static void
mext_inode_double_lock(struct inode *inode1, struct inode *inode2)
{
- int ret = 0;
-
- BUG_ON(inode1 == NULL && inode2 == NULL);
-
- ret = mext_check_null_inode(inode1, inode2, __func__, __LINE__);
- if (ret < 0)
- goto out;
-
- if (inode1 == inode2) {
- mutex_lock(&inode1->i_mutex);
- goto out;
- }
-
- if (inode1->i_ino < inode2->i_ino) {
+ BUG_ON(inode1 == inode2);
+ if (inode1 < inode2) {
mutex_lock_nested(&inode1->i_mutex, I_MUTEX_PARENT);
mutex_lock_nested(&inode2->i_mutex, I_MUTEX_CHILD);
} else {
mutex_lock_nested(&inode2->i_mutex, I_MUTEX_PARENT);
mutex_lock_nested(&inode1->i_mutex, I_MUTEX_CHILD);
}
-
-out:
- return ret;
}
/**
@@ -1109,28 +1223,13 @@ out:
* @inode1: the inode that is released first
* @inode2: the inode that is released second
*
- * If inode1 or inode2 is NULL, return -EIO. Otherwise, return 0.
*/
-static int
+static void
mext_inode_double_unlock(struct inode *inode1, struct inode *inode2)
{
- int ret = 0;
-
- BUG_ON(inode1 == NULL && inode2 == NULL);
-
- ret = mext_check_null_inode(inode1, inode2, __func__, __LINE__);
- if (ret < 0)
- goto out;
-
- if (inode1)
- mutex_unlock(&inode1->i_mutex);
-
- if (inode2 && inode2 != inode1)
- mutex_unlock(&inode2->i_mutex);
-
-out:
- return ret;
+ mutex_unlock(&inode1->i_mutex);
+ mutex_unlock(&inode2->i_mutex);
}
/**
@@ -1187,16 +1286,23 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
ext4_lblk_t block_end, seq_start, add_blocks, file_end, seq_blocks = 0;
ext4_lblk_t rest_blocks;
pgoff_t orig_page_offset = 0, seq_end_page;
- int ret1, ret2, depth, last_extent = 0;
+ int ret, depth, last_extent = 0;
int blocks_per_page = PAGE_CACHE_SIZE >> orig_inode->i_blkbits;
int data_offset_in_page;
int block_len_in_page;
int uninit;
- /* orig and donor should be different file */
- if (orig_inode->i_ino == donor_inode->i_ino) {
+ if (orig_inode->i_sb != donor_inode->i_sb) {
+ ext4_debug("ext4 move extent: The argument files "
+ "should be in same FS [ino:orig %lu, donor %lu]\n",
+ orig_inode->i_ino, donor_inode->i_ino);
+ return -EINVAL;
+ }
+
+ /* orig and donor should be different inodes */
+ if (orig_inode == donor_inode) {
ext4_debug("ext4 move extent: The argument files should not "
- "be same file [ino:orig %lu, donor %lu]\n",
+ "be same inode [ino:orig %lu, donor %lu]\n",
orig_inode->i_ino, donor_inode->i_ino);
return -EINVAL;
}
@@ -1208,18 +1314,27 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
orig_inode->i_ino, donor_inode->i_ino);
return -EINVAL;
}
-
+ /* TODO: This is non obvious task to swap blocks for inodes with full
+ jornaling enabled */
+ if (ext4_should_journal_data(orig_inode) ||
+ ext4_should_journal_data(donor_inode)) {
+ return -EINVAL;
+ }
/* Protect orig and donor inodes against a truncate */
- ret1 = mext_inode_double_lock(orig_inode, donor_inode);
- if (ret1 < 0)
- return ret1;
+ mext_inode_double_lock(orig_inode, donor_inode);
+
+ /* Wait for all existing dio workers */
+ ext4_inode_block_unlocked_dio(orig_inode);
+ ext4_inode_block_unlocked_dio(donor_inode);
+ inode_dio_wait(orig_inode);
+ inode_dio_wait(donor_inode);
/* Protect extent tree against block allocations via delalloc */
double_down_write_data_sem(orig_inode, donor_inode);
/* Check the filesystem environment whether move_extent can be done */
- ret1 = mext_check_arguments(orig_inode, donor_inode, orig_start,
+ ret = mext_check_arguments(orig_inode, donor_inode, orig_start,
donor_start, &len);
- if (ret1)
+ if (ret)
goto out;
file_end = (i_size_read(orig_inode) - 1) >> orig_inode->i_blkbits;
@@ -1227,13 +1342,13 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
if (file_end < block_end)
len -= block_end - file_end;
- ret1 = get_ext_path(orig_inode, block_start, &orig_path);
- if (ret1)
+ ret = get_ext_path(orig_inode, block_start, &orig_path);
+ if (ret)
goto out;
/* Get path structure to check the hole */
- ret1 = get_ext_path(orig_inode, block_start, &holecheck_path);
- if (ret1)
+ ret = get_ext_path(orig_inode, block_start, &holecheck_path);
+ if (ret)
goto out;
depth = ext_depth(orig_inode);
@@ -1252,13 +1367,13 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
last_extent = mext_next_extent(orig_inode,
holecheck_path, &ext_cur);
if (last_extent < 0) {
- ret1 = last_extent;
+ ret = last_extent;
goto out;
}
last_extent = mext_next_extent(orig_inode, orig_path,
&ext_dummy);
if (last_extent < 0) {
- ret1 = last_extent;
+ ret = last_extent;
goto out;
}
seq_start = le32_to_cpu(ext_cur->ee_block);
@@ -1272,7 +1387,7 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
if (le32_to_cpu(ext_cur->ee_block) > block_end) {
ext4_debug("ext4 move extent: The specified range of file "
"may be the hole\n");
- ret1 = -EINVAL;
+ ret = -EINVAL;
goto out;
}
@@ -1292,7 +1407,7 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
last_extent = mext_next_extent(orig_inode, holecheck_path,
&ext_cur);
if (last_extent < 0) {
- ret1 = last_extent;
+ ret = last_extent;
break;
}
add_blocks = ext4_ext_get_actual_len(ext_cur);
@@ -1349,18 +1464,18 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
orig_page_offset,
data_offset_in_page,
block_len_in_page, uninit,
- &ret1);
+ &ret);
/* Count how many blocks we have exchanged */
*moved_len += block_len_in_page;
- if (ret1 < 0)
+ if (ret < 0)
break;
if (*moved_len > len) {
EXT4_ERROR_INODE(orig_inode,
"We replaced blocks too much! "
"sum of replaced: %llu requested: %llu",
*moved_len, len);
- ret1 = -EIO;
+ ret = -EIO;
break;
}
@@ -1374,22 +1489,22 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
}
double_down_write_data_sem(orig_inode, donor_inode);
- if (ret1 < 0)
+ if (ret < 0)
break;
/* Decrease buffer counter */
if (holecheck_path)
ext4_ext_drop_refs(holecheck_path);
- ret1 = get_ext_path(orig_inode, seq_start, &holecheck_path);
- if (ret1)
+ ret = get_ext_path(orig_inode, seq_start, &holecheck_path);
+ if (ret)
break;
depth = holecheck_path->p_depth;
/* Decrease buffer counter */
if (orig_path)
ext4_ext_drop_refs(orig_path);
- ret1 = get_ext_path(orig_inode, seq_start, &orig_path);
- if (ret1)
+ ret = get_ext_path(orig_inode, seq_start, &orig_path);
+ if (ret)
break;
ext_cur = holecheck_path[depth].p_ext;
@@ -1412,12 +1527,9 @@ out:
kfree(holecheck_path);
}
double_up_write_data_sem(orig_inode, donor_inode);
- ret2 = mext_inode_double_unlock(orig_inode, donor_inode);
-
- if (ret1)
- return ret1;
- else if (ret2)
- return ret2;
+ ext4_inode_resume_unlocked_dio(orig_inode);
+ ext4_inode_resume_unlocked_dio(donor_inode);
+ mext_inode_double_unlock(orig_inode, donor_inode);
- return 0;
+ return ret;
}
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 2a42cc04466f..6d600a69fc9d 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -55,6 +55,13 @@ static struct buffer_head *ext4_append(handle_t *handle,
{
struct buffer_head *bh;
+ if (unlikely(EXT4_SB(inode->i_sb)->s_max_dir_size_kb &&
+ ((inode->i_size >> 10) >=
+ EXT4_SB(inode->i_sb)->s_max_dir_size_kb))) {
+ *err = -ENOSPC;
+ return NULL;
+ }
+
*block = inode->i_size >> inode->i_sb->s_blocksize_bits;
bh = ext4_bread(handle, inode, *block, 1, err);
@@ -67,6 +74,12 @@ static struct buffer_head *ext4_append(handle_t *handle,
bh = NULL;
}
}
+ if (!bh && !(*err)) {
+ *err = -EIO;
+ ext4_error(inode->i_sb,
+ "Directory hole detected on inode %lu\n",
+ inode->i_ino);
+ }
return bh;
}
@@ -594,8 +607,11 @@ dx_probe(const struct qstr *d_name, struct inode *dir,
u32 hash;
frame->bh = NULL;
- if (!(bh = ext4_bread (NULL,dir, 0, 0, err)))
+ if (!(bh = ext4_bread(NULL, dir, 0, 0, err))) {
+ if (*err == 0)
+ *err = ERR_BAD_DX_DIR;
goto fail;
+ }
root = (struct dx_root *) bh->b_data;
if (root->info.hash_version != DX_HASH_TEA &&
root->info.hash_version != DX_HASH_HALF_MD4 &&
@@ -696,8 +712,11 @@ dx_probe(const struct qstr *d_name, struct inode *dir,
frame->entries = entries;
frame->at = at;
if (!indirect--) return frame;
- if (!(bh = ext4_bread (NULL,dir, dx_get_block(at), 0, err)))
+ if (!(bh = ext4_bread(NULL, dir, dx_get_block(at), 0, err))) {
+ if (!(*err))
+ *err = ERR_BAD_DX_DIR;
goto fail2;
+ }
at = entries = ((struct dx_node *) bh->b_data)->entries;
if (!buffer_verified(bh) &&
@@ -807,8 +826,15 @@ static int ext4_htree_next_block(struct inode *dir, __u32 hash,
*/
while (num_frames--) {
if (!(bh = ext4_bread(NULL, dir, dx_get_block(p->at),
- 0, &err)))
+ 0, &err))) {
+ if (!err) {
+ ext4_error(dir->i_sb,
+ "Directory hole detected on inode %lu\n",
+ dir->i_ino);
+ return -EIO;
+ }
return err; /* Failure */
+ }
if (!buffer_verified(bh) &&
!ext4_dx_csum_verify(dir,
@@ -839,12 +865,19 @@ static int htree_dirblock_to_tree(struct file *dir_file,
{
struct buffer_head *bh;
struct ext4_dir_entry_2 *de, *top;
- int err, count = 0;
+ int err = 0, count = 0;
dxtrace(printk(KERN_INFO "In htree dirblock_to_tree: block %lu\n",
(unsigned long)block));
- if (!(bh = ext4_bread (NULL, dir, block, 0, &err)))
+ if (!(bh = ext4_bread(NULL, dir, block, 0, &err))) {
+ if (!err) {
+ err = -EIO;
+ ext4_error(dir->i_sb,
+ "Directory hole detected on inode %lu\n",
+ dir->i_ino);
+ }
return err;
+ }
if (!buffer_verified(bh) &&
!ext4_dirent_csum_verify(dir, (struct ext4_dir_entry *)bh->b_data))
@@ -1267,8 +1300,15 @@ static struct buffer_head * ext4_dx_find_entry(struct inode *dir, const struct q
return NULL;
do {
block = dx_get_block(frame->at);
- if (!(bh = ext4_bread(NULL, dir, block, 0, err)))
+ if (!(bh = ext4_bread(NULL, dir, block, 0, err))) {
+ if (!(*err)) {
+ *err = -EIO;
+ ext4_error(dir->i_sb,
+ "Directory hole detected on inode %lu\n",
+ dir->i_ino);
+ }
goto errout;
+ }
if (!buffer_verified(bh) &&
!ext4_dirent_csum_verify(dir,
@@ -1801,9 +1841,15 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
}
blocks = dir->i_size >> sb->s_blocksize_bits;
for (block = 0; block < blocks; block++) {
- bh = ext4_bread(handle, dir, block, 0, &retval);
- if(!bh)
+ if (!(bh = ext4_bread(handle, dir, block, 0, &retval))) {
+ if (!retval) {
+ retval = -EIO;
+ ext4_error(inode->i_sb,
+ "Directory hole detected on inode %lu\n",
+ inode->i_ino);
+ }
return retval;
+ }
if (!buffer_verified(bh) &&
!ext4_dirent_csum_verify(dir,
(struct ext4_dir_entry *)bh->b_data))
@@ -1860,8 +1906,15 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
entries = frame->entries;
at = frame->at;
- if (!(bh = ext4_bread(handle,dir, dx_get_block(frame->at), 0, &err)))
+ if (!(bh = ext4_bread(handle, dir, dx_get_block(frame->at), 0, &err))) {
+ if (!err) {
+ err = -EIO;
+ ext4_error(dir->i_sb,
+ "Directory hole detected on inode %lu\n",
+ dir->i_ino);
+ }
goto cleanup;
+ }
if (!buffer_verified(bh) &&
!ext4_dirent_csum_verify(dir, (struct ext4_dir_entry *)bh->b_data))
@@ -2149,9 +2202,7 @@ retry:
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
init_special_inode(inode, inode->i_mode, rdev);
-#ifdef CONFIG_EXT4_FS_XATTR
inode->i_op = &ext4_special_inode_operations;
-#endif
err = ext4_add_nondir(handle, dentry, inode);
}
ext4_journal_stop(handle);
@@ -2199,9 +2250,15 @@ retry:
inode->i_op = &ext4_dir_inode_operations;
inode->i_fop = &ext4_dir_operations;
inode->i_size = EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
- dir_block = ext4_bread(handle, inode, 0, 1, &err);
- if (!dir_block)
+ if (!(dir_block = ext4_bread(handle, inode, 0, 1, &err))) {
+ if (!err) {
+ err = -EIO;
+ ext4_error(inode->i_sb,
+ "Directory hole detected on inode %lu\n",
+ inode->i_ino);
+ }
goto out_clear_inode;
+ }
BUFFER_TRACE(dir_block, "get_write_access");
err = ext4_journal_get_write_access(handle, dir_block);
if (err)
@@ -2318,6 +2375,11 @@ static int empty_dir(struct inode *inode)
EXT4_ERROR_INODE(inode,
"error %d reading directory "
"lblock %u", err, lblock);
+ else
+ ext4_warning(inode->i_sb,
+ "bad directory (dir #%lu) - no data block",
+ inode->i_ino);
+
offset += sb->s_blocksize;
continue;
}
@@ -2362,7 +2424,7 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode)
struct ext4_iloc iloc;
int err = 0, rc;
- if (!ext4_handle_valid(handle))
+ if (!EXT4_SB(sb)->s_journal)
return 0;
mutex_lock(&EXT4_SB(sb)->s_orphan_lock);
@@ -2436,8 +2498,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
struct ext4_iloc iloc;
int err = 0;
- /* ext4_handle_valid() assumes a valid handle_t pointer */
- if (handle && !ext4_handle_valid(handle))
+ if (!EXT4_SB(inode->i_sb)->s_journal)
return 0;
mutex_lock(&EXT4_SB(inode->i_sb)->s_orphan_lock);
@@ -2456,7 +2517,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
* transaction handle with which to update the orphan list on
* disk, but we still need to remove the inode from the linked
* list in memory. */
- if (sbi->s_journal && !handle)
+ if (!handle)
goto out;
err = ext4_reserve_inode_write(handle, inode, &iloc);
@@ -2826,9 +2887,15 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
goto end_rename;
}
retval = -EIO;
- dir_bh = ext4_bread(handle, old_inode, 0, 0, &retval);
- if (!dir_bh)
+ if (!(dir_bh = ext4_bread(handle, old_inode, 0, 0, &retval))) {
+ if (!retval) {
+ retval = -EIO;
+ ext4_error(old_inode->i_sb,
+ "Directory hole detected on inode %lu\n",
+ old_inode->i_ino);
+ }
goto end_rename;
+ }
if (!buffer_verified(dir_bh) &&
!ext4_dirent_csum_verify(old_inode,
(struct ext4_dir_entry *)dir_bh->b_data))
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index dcdeef169a69..68e896e12a67 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -71,6 +71,9 @@ void ext4_free_io_end(ext4_io_end_t *io)
int i;
BUG_ON(!io);
+ BUG_ON(!list_empty(&io->list));
+ BUG_ON(io->flag & EXT4_IO_END_UNWRITTEN);
+
if (io->page)
put_page(io->page);
for (i = 0; i < io->num_io_pages; i++)
@@ -81,13 +84,8 @@ void ext4_free_io_end(ext4_io_end_t *io)
kmem_cache_free(io_end_cachep, io);
}
-/*
- * check a range of space and convert unwritten extents to written.
- *
- * Called with inode->i_mutex; we depend on this when we manipulate
- * io->flag, since we could otherwise race with ext4_flush_completed_IO()
- */
-int ext4_end_io_nolock(ext4_io_end_t *io)
+/* check a range of space and convert unwritten extents to written. */
+static int ext4_end_io(ext4_io_end_t *io)
{
struct inode *inode = io->inode;
loff_t offset = io->offset;
@@ -106,63 +104,136 @@ int ext4_end_io_nolock(ext4_io_end_t *io)
"(inode %lu, offset %llu, size %zd, error %d)",
inode->i_ino, offset, size, ret);
}
-
if (io->iocb)
aio_complete(io->iocb, io->result, 0);
if (io->flag & EXT4_IO_END_DIRECT)
inode_dio_done(inode);
/* Wake up anyone waiting on unwritten extent conversion */
- if (atomic_dec_and_test(&EXT4_I(inode)->i_aiodio_unwritten))
+ if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten))
wake_up_all(ext4_ioend_wq(io->inode));
return ret;
}
-/*
- * work on completed aio dio IO, to convert unwritten extents to extents
- */
-static void ext4_end_io_work(struct work_struct *work)
+static void dump_completed_IO(struct inode *inode)
+{
+#ifdef EXT4FS_DEBUG
+ struct list_head *cur, *before, *after;
+ ext4_io_end_t *io, *io0, *io1;
+ unsigned long flags;
+
+ if (list_empty(&EXT4_I(inode)->i_completed_io_list)) {
+ ext4_debug("inode %lu completed_io list is empty\n",
+ inode->i_ino);
+ return;
+ }
+
+ ext4_debug("Dump inode %lu completed_io list\n", inode->i_ino);
+ list_for_each_entry(io, &EXT4_I(inode)->i_completed_io_list, list) {
+ cur = &io->list;
+ before = cur->prev;
+ io0 = container_of(before, ext4_io_end_t, list);
+ after = cur->next;
+ io1 = container_of(after, ext4_io_end_t, list);
+
+ ext4_debug("io 0x%p from inode %lu,prev 0x%p,next 0x%p\n",
+ io, inode->i_ino, io0, io1);
+ }
+#endif
+}
+
+/* Add the io_end to per-inode completed end_io list. */
+void ext4_add_complete_io(ext4_io_end_t *io_end)
{
- ext4_io_end_t *io = container_of(work, ext4_io_end_t, work);
- struct inode *inode = io->inode;
- struct ext4_inode_info *ei = EXT4_I(inode);
- unsigned long flags;
+ struct ext4_inode_info *ei = EXT4_I(io_end->inode);
+ struct workqueue_struct *wq;
+ unsigned long flags;
+
+ BUG_ON(!(io_end->flag & EXT4_IO_END_UNWRITTEN));
+ wq = EXT4_SB(io_end->inode->i_sb)->dio_unwritten_wq;
spin_lock_irqsave(&ei->i_completed_io_lock, flags);
- if (io->flag & EXT4_IO_END_IN_FSYNC)
- goto requeue;
- if (list_empty(&io->list)) {
- spin_unlock_irqrestore(&ei->i_completed_io_lock, flags);
- goto free;
+ if (list_empty(&ei->i_completed_io_list)) {
+ io_end->flag |= EXT4_IO_END_QUEUED;
+ queue_work(wq, &io_end->work);
}
+ list_add_tail(&io_end->list, &ei->i_completed_io_list);
+ spin_unlock_irqrestore(&ei->i_completed_io_lock, flags);
+}
- if (!mutex_trylock(&inode->i_mutex)) {
- bool was_queued;
-requeue:
- was_queued = !!(io->flag & EXT4_IO_END_QUEUED);
- io->flag |= EXT4_IO_END_QUEUED;
- spin_unlock_irqrestore(&ei->i_completed_io_lock, flags);
- /*
- * Requeue the work instead of waiting so that the work
- * items queued after this can be processed.
- */
- queue_work(EXT4_SB(inode->i_sb)->dio_unwritten_wq, &io->work);
- /*
- * To prevent the ext4-dio-unwritten thread from keeping
- * requeueing end_io requests and occupying cpu for too long,
- * yield the cpu if it sees an end_io request that has already
- * been requeued.
- */
- if (was_queued)
- yield();
- return;
+static int ext4_do_flush_completed_IO(struct inode *inode,
+ ext4_io_end_t *work_io)
+{
+ ext4_io_end_t *io;
+ struct list_head unwritten, complete, to_free;
+ unsigned long flags;
+ struct ext4_inode_info *ei = EXT4_I(inode);
+ int err, ret = 0;
+
+ INIT_LIST_HEAD(&complete);
+ INIT_LIST_HEAD(&to_free);
+
+ spin_lock_irqsave(&ei->i_completed_io_lock, flags);
+ dump_completed_IO(inode);
+ list_replace_init(&ei->i_completed_io_list, &unwritten);
+ spin_unlock_irqrestore(&ei->i_completed_io_lock, flags);
+
+ while (!list_empty(&unwritten)) {
+ io = list_entry(unwritten.next, ext4_io_end_t, list);
+ BUG_ON(!(io->flag & EXT4_IO_END_UNWRITTEN));
+ list_del_init(&io->list);
+
+ err = ext4_end_io(io);
+ if (unlikely(!ret && err))
+ ret = err;
+
+ list_add_tail(&io->list, &complete);
+ }
+ spin_lock_irqsave(&ei->i_completed_io_lock, flags);
+ while (!list_empty(&complete)) {
+ io = list_entry(complete.next, ext4_io_end_t, list);
+ io->flag &= ~EXT4_IO_END_UNWRITTEN;
+ /* end_io context can not be destroyed now because it still
+ * used by queued worker. Worker thread will destroy it later */
+ if (io->flag & EXT4_IO_END_QUEUED)
+ list_del_init(&io->list);
+ else
+ list_move(&io->list, &to_free);
+ }
+ /* If we are called from worker context, it is time to clear queued
+ * flag, and destroy it's end_io if it was converted already */
+ if (work_io) {
+ work_io->flag &= ~EXT4_IO_END_QUEUED;
+ if (!(work_io->flag & EXT4_IO_END_UNWRITTEN))
+ list_add_tail(&work_io->list, &to_free);
}
- list_del_init(&io->list);
spin_unlock_irqrestore(&ei->i_completed_io_lock, flags);
- (void) ext4_end_io_nolock(io);
- mutex_unlock(&inode->i_mutex);
-free:
- ext4_free_io_end(io);
+
+ while (!list_empty(&to_free)) {
+ io = list_entry(to_free.next, ext4_io_end_t, list);
+ list_del_init(&io->list);
+ ext4_free_io_end(io);
+ }
+ return ret;
+}
+
+/*
+ * work on completed aio dio IO, to convert unwritten extents to extents
+ */
+static void ext4_end_io_work(struct work_struct *work)
+{
+ ext4_io_end_t *io = container_of(work, ext4_io_end_t, work);
+ ext4_do_flush_completed_IO(io->inode, io);
+}
+
+int ext4_flush_unwritten_io(struct inode *inode)
+{
+ int ret;
+ WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex) &&
+ !(inode->i_state & I_FREEING));
+ ret = ext4_do_flush_completed_IO(inode, NULL);
+ ext4_unwritten_wait(inode);
+ return ret;
}
ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags)
@@ -195,9 +266,7 @@ static void buffer_io_error(struct buffer_head *bh)
static void ext4_end_bio(struct bio *bio, int error)
{
ext4_io_end_t *io_end = bio->bi_private;
- struct workqueue_struct *wq;
struct inode *inode;
- unsigned long flags;
int i;
sector_t bi_sector = bio->bi_sector;
@@ -255,14 +324,7 @@ static void ext4_end_bio(struct bio *bio, int error)
return;
}
- /* Add the io_end to per-inode completed io list*/
- spin_lock_irqsave(&EXT4_I(inode)->i_completed_io_lock, flags);
- list_add_tail(&io_end->list, &EXT4_I(inode)->i_completed_io_list);
- spin_unlock_irqrestore(&EXT4_I(inode)->i_completed_io_lock, flags);
-
- wq = EXT4_SB(inode->i_sb)->dio_unwritten_wq;
- /* queue the work to convert unwritten extents to written */
- queue_work(wq, &io_end->work);
+ ext4_add_complete_io(io_end);
}
void ext4_io_submit(struct ext4_io_submit *io)
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 41f6ef68e2e1..7a75e1086961 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -45,6 +45,28 @@ void ext4_resize_end(struct super_block *sb)
smp_mb__after_clear_bit();
}
+static ext4_group_t ext4_meta_bg_first_group(struct super_block *sb,
+ ext4_group_t group) {
+ return (group >> EXT4_DESC_PER_BLOCK_BITS(sb)) <<
+ EXT4_DESC_PER_BLOCK_BITS(sb);
+}
+
+static ext4_fsblk_t ext4_meta_bg_first_block_no(struct super_block *sb,
+ ext4_group_t group) {
+ group = ext4_meta_bg_first_group(sb, group);
+ return ext4_group_first_block_no(sb, group);
+}
+
+static ext4_grpblk_t ext4_group_overhead_blocks(struct super_block *sb,
+ ext4_group_t group) {
+ ext4_grpblk_t overhead;
+ overhead = ext4_bg_num_gdb(sb, group);
+ if (ext4_bg_has_super(sb, group))
+ overhead += 1 +
+ le16_to_cpu(EXT4_SB(sb)->s_es->s_reserved_gdt_blocks);
+ return overhead;
+}
+
#define outside(b, first, last) ((b) < (first) || (b) >= (last))
#define inside(b, first, last) ((b) >= (first) && (b) < (last))
@@ -57,9 +79,7 @@ static int verify_group_input(struct super_block *sb,
ext4_fsblk_t end = start + input->blocks_count;
ext4_group_t group = input->group;
ext4_fsblk_t itend = input->inode_table + sbi->s_itb_per_group;
- unsigned overhead = ext4_bg_has_super(sb, group) ?
- (1 + ext4_bg_num_gdb(sb, group) +
- le16_to_cpu(es->s_reserved_gdt_blocks)) : 0;
+ unsigned overhead = ext4_group_overhead_blocks(sb, group);
ext4_fsblk_t metaend = start + overhead;
struct buffer_head *bh = NULL;
ext4_grpblk_t free_blocks_count, offset;
@@ -200,13 +220,15 @@ static void free_flex_gd(struct ext4_new_flex_group_data *flex_gd)
* be a partial of a flex group.
*
* @sb: super block of fs to which the groups belongs
+ *
+ * Returns 0 on a successful allocation of the metadata blocks in the
+ * block group.
*/
-static void ext4_alloc_group_tables(struct super_block *sb,
+static int ext4_alloc_group_tables(struct super_block *sb,
struct ext4_new_flex_group_data *flex_gd,
int flexbg_size)
{
struct ext4_new_group_data *group_data = flex_gd->groups;
- struct ext4_super_block *es = EXT4_SB(sb)->s_es;
ext4_fsblk_t start_blk;
ext4_fsblk_t last_blk;
ext4_group_t src_group;
@@ -226,23 +248,24 @@ static void ext4_alloc_group_tables(struct super_block *sb,
(last_group & ~(flexbg_size - 1))));
next_group:
group = group_data[0].group;
+ if (src_group >= group_data[0].group + flex_gd->count)
+ return -ENOSPC;
start_blk = ext4_group_first_block_no(sb, src_group);
last_blk = start_blk + group_data[src_group - group].blocks_count;
- overhead = ext4_bg_has_super(sb, src_group) ?
- (1 + ext4_bg_num_gdb(sb, src_group) +
- le16_to_cpu(es->s_reserved_gdt_blocks)) : 0;
+ overhead = ext4_group_overhead_blocks(sb, src_group);
start_blk += overhead;
- BUG_ON(src_group >= group_data[0].group + flex_gd->count);
/* We collect contiguous blocks as much as possible. */
src_group++;
- for (; src_group <= last_group; src_group++)
- if (!ext4_bg_has_super(sb, src_group))
+ for (; src_group <= last_group; src_group++) {
+ overhead = ext4_group_overhead_blocks(sb, src_group);
+ if (overhead != 0)
last_blk += group_data[src_group - group].blocks_count;
else
break;
+ }
/* Allocate block bitmaps */
for (; bb_index < flex_gd->count; bb_index++) {
@@ -300,6 +323,7 @@ next_group:
group_data[i].free_blocks_count);
}
}
+ return 0;
}
static struct buffer_head *bclean(handle_t *handle, struct super_block *sb,
@@ -433,11 +457,13 @@ static int setup_new_flex_group_blocks(struct super_block *sb,
ext4_group_t group, count;
struct buffer_head *bh = NULL;
int reserved_gdb, i, j, err = 0, err2;
+ int meta_bg;
BUG_ON(!flex_gd->count || !group_data ||
group_data[0].group != sbi->s_groups_count);
reserved_gdb = le16_to_cpu(es->s_reserved_gdt_blocks);
+ meta_bg = EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG);
/* This transaction may be extended/restarted along the way */
handle = ext4_journal_start_sb(sb, EXT4_MAX_TRANS_DATA);
@@ -447,12 +473,25 @@ static int setup_new_flex_group_blocks(struct super_block *sb,
group = group_data[0].group;
for (i = 0; i < flex_gd->count; i++, group++) {
unsigned long gdblocks;
+ ext4_grpblk_t overhead;
gdblocks = ext4_bg_num_gdb(sb, group);
start = ext4_group_first_block_no(sb, group);
+ if (meta_bg == 0 && !ext4_bg_has_super(sb, group))
+ goto handle_itb;
+
+ if (meta_bg == 1) {
+ ext4_group_t first_group;
+ first_group = ext4_meta_bg_first_group(sb, group);
+ if (first_group != group + 1 &&
+ first_group != group + EXT4_DESC_PER_BLOCK(sb) - 1)
+ goto handle_itb;
+ }
+
+ block = start + ext4_bg_has_super(sb, group);
/* Copy all of the GDT blocks into the backup in this group */
- for (j = 0, block = start + 1; j < gdblocks; j++, block++) {
+ for (j = 0; j < gdblocks; j++, block++) {
struct buffer_head *gdb;
ext4_debug("update backup group %#04llx\n", block);
@@ -493,6 +532,7 @@ static int setup_new_flex_group_blocks(struct super_block *sb,
goto out;
}
+handle_itb:
/* Initialize group tables of the grop @group */
if (!(bg_flags[i] & EXT4_BG_INODE_ZEROED))
goto handle_bb;
@@ -521,11 +561,11 @@ handle_bb:
err = PTR_ERR(bh);
goto out;
}
- if (ext4_bg_has_super(sb, group)) {
+ overhead = ext4_group_overhead_blocks(sb, group);
+ if (overhead != 0) {
ext4_debug("mark backup superblock %#04llx (+0)\n",
start);
- ext4_set_bits(bh->b_data, 0, gdblocks + reserved_gdb +
- 1);
+ ext4_set_bits(bh->b_data, 0, overhead);
}
ext4_mark_bitmap_end(group_data[i].blocks_count,
sb->s_blocksize * 8, bh->b_data);
@@ -822,6 +862,45 @@ exit_bh:
}
/*
+ * add_new_gdb_meta_bg is the sister of add_new_gdb.
+ */
+static int add_new_gdb_meta_bg(struct super_block *sb,
+ handle_t *handle, ext4_group_t group) {
+ ext4_fsblk_t gdblock;
+ struct buffer_head *gdb_bh;
+ struct buffer_head **o_group_desc, **n_group_desc;
+ unsigned long gdb_num = group / EXT4_DESC_PER_BLOCK(sb);
+ int err;
+
+ gdblock = ext4_meta_bg_first_block_no(sb, group) +
+ ext4_bg_has_super(sb, group);
+ gdb_bh = sb_bread(sb, gdblock);
+ if (!gdb_bh)
+ return -EIO;
+ n_group_desc = ext4_kvmalloc((gdb_num + 1) *
+ sizeof(struct buffer_head *),
+ GFP_NOFS);
+ if (!n_group_desc) {
+ err = -ENOMEM;
+ ext4_warning(sb, "not enough memory for %lu groups",
+ gdb_num + 1);
+ return err;
+ }
+
+ o_group_desc = EXT4_SB(sb)->s_group_desc;
+ memcpy(n_group_desc, o_group_desc,
+ EXT4_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
+ n_group_desc[gdb_num] = gdb_bh;
+ EXT4_SB(sb)->s_group_desc = n_group_desc;
+ EXT4_SB(sb)->s_gdb_count++;
+ ext4_kvfree(o_group_desc);
+ err = ext4_journal_get_write_access(handle, gdb_bh);
+ if (unlikely(err))
+ brelse(gdb_bh);
+ return err;
+}
+
+/*
* Called when we are adding a new group which has a backup copy of each of
* the GDT blocks (i.e. sparse group) and there are reserved GDT blocks.
* We need to add these reserved backup GDT blocks to the resize inode, so
@@ -949,16 +1028,16 @@ exit_free:
* do not copy the full number of backups at this time. The resize
* which changed s_groups_count will backup again.
*/
-static void update_backups(struct super_block *sb,
- int blk_off, char *data, int size)
+static void update_backups(struct super_block *sb, int blk_off, char *data,
+ int size, int meta_bg)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
- const ext4_group_t last = sbi->s_groups_count;
+ ext4_group_t last;
const int bpg = EXT4_BLOCKS_PER_GROUP(sb);
unsigned three = 1;
unsigned five = 5;
unsigned seven = 7;
- ext4_group_t group;
+ ext4_group_t group = 0;
int rest = sb->s_blocksize - size;
handle_t *handle;
int err = 0, err2;
@@ -970,10 +1049,17 @@ static void update_backups(struct super_block *sb,
goto exit_err;
}
- ext4_superblock_csum_set(sb, (struct ext4_super_block *)data);
+ if (meta_bg == 0) {
+ group = ext4_list_backups(sb, &three, &five, &seven);
+ last = sbi->s_groups_count;
+ } else {
+ group = ext4_meta_bg_first_group(sb, group) + 1;
+ last = (ext4_group_t)(group + EXT4_DESC_PER_BLOCK(sb) - 2);
+ }
- while ((group = ext4_list_backups(sb, &three, &five, &seven)) < last) {
+ while (group < sbi->s_groups_count) {
struct buffer_head *bh;
+ ext4_fsblk_t backup_block;
/* Out of journal space, and can't get more - abort - so sad */
if (ext4_handle_valid(handle) &&
@@ -982,13 +1068,20 @@ static void update_backups(struct super_block *sb,
(err = ext4_journal_restart(handle, EXT4_MAX_TRANS_DATA)))
break;
- bh = sb_getblk(sb, group * bpg + blk_off);
+ if (meta_bg == 0)
+ backup_block = group * bpg + blk_off;
+ else
+ backup_block = (ext4_group_first_block_no(sb, group) +
+ ext4_bg_has_super(sb, group));
+
+ bh = sb_getblk(sb, backup_block);
if (!bh) {
err = -EIO;
break;
}
- ext4_debug("update metadata backup %#04lx\n",
- (unsigned long)bh->b_blocknr);
+ ext4_debug("update metadata backup %llu(+%llu)\n",
+ backup_block, backup_block -
+ ext4_group_first_block_no(sb, group));
if ((err = ext4_journal_get_write_access(handle, bh)))
break;
lock_buffer(bh);
@@ -1001,6 +1094,13 @@ static void update_backups(struct super_block *sb,
if (unlikely(err))
ext4_std_error(sb, err);
brelse(bh);
+
+ if (meta_bg == 0)
+ group = ext4_list_backups(sb, &three, &five, &seven);
+ else if (group == last)
+ break;
+ else
+ group = last;
}
if ((err2 = ext4_journal_stop(handle)) && !err)
err = err2;
@@ -1043,7 +1143,9 @@ static int ext4_add_new_descs(handle_t *handle, struct super_block *sb,
struct ext4_super_block *es = sbi->s_es;
struct buffer_head *gdb_bh;
int i, gdb_off, gdb_num, err = 0;
+ int meta_bg;
+ meta_bg = EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG);
for (i = 0; i < count; i++, group++) {
int reserved_gdb = ext4_bg_has_super(sb, group) ?
le16_to_cpu(es->s_reserved_gdt_blocks) : 0;
@@ -1063,8 +1165,11 @@ static int ext4_add_new_descs(handle_t *handle, struct super_block *sb,
if (!err && reserved_gdb && ext4_bg_num_gdb(sb, group))
err = reserve_backup_gdb(handle, resize_inode, group);
- } else
+ } else if (meta_bg != 0) {
+ err = add_new_gdb_meta_bg(sb, handle, group);
+ } else {
err = add_new_gdb(handle, resize_inode, group);
+ }
if (err)
break;
}
@@ -1076,17 +1181,12 @@ static struct buffer_head *ext4_get_bitmap(struct super_block *sb, __u64 block)
struct buffer_head *bh = sb_getblk(sb, block);
if (!bh)
return NULL;
-
- if (bitmap_uptodate(bh))
- return bh;
-
- lock_buffer(bh);
- if (bh_submit_read(bh) < 0) {
- unlock_buffer(bh);
- brelse(bh);
- return NULL;
+ if (!bh_uptodate_or_lock(bh)) {
+ if (bh_submit_read(bh) < 0) {
+ brelse(bh);
+ return NULL;
+ }
}
- unlock_buffer(bh);
return bh;
}
@@ -1161,6 +1261,9 @@ static int ext4_setup_new_descs(handle_t *handle, struct super_block *sb,
ext4_free_group_clusters_set(sb, gdp,
EXT4_B2C(sbi, group_data->free_blocks_count));
ext4_free_inodes_set(sb, gdp, EXT4_INODES_PER_GROUP(sb));
+ if (ext4_has_group_desc_csum(sb))
+ ext4_itable_unused_set(sb, gdp,
+ EXT4_INODES_PER_GROUP(sb));
gdp->bg_flags = cpu_to_le16(*bg_flags);
ext4_group_desc_csum_set(sb, group, gdp);
@@ -1216,7 +1319,7 @@ static void ext4_update_super(struct super_block *sb,
}
reserved_blocks = ext4_r_blocks_count(es) * 100;
- do_div(reserved_blocks, ext4_blocks_count(es));
+ reserved_blocks = div64_u64(reserved_blocks, ext4_blocks_count(es));
reserved_blocks *= blocks_count;
do_div(reserved_blocks, 100);
@@ -1227,6 +1330,7 @@ static void ext4_update_super(struct super_block *sb,
le32_add_cpu(&es->s_free_inodes_count, EXT4_INODES_PER_GROUP(sb) *
flex_gd->count);
+ ext4_debug("free blocks count %llu", ext4_free_blocks_count(es));
/*
* We need to protect s_groups_count against other CPUs seeing
* inconsistent state in the superblock.
@@ -1261,6 +1365,8 @@ static void ext4_update_super(struct super_block *sb,
percpu_counter_add(&sbi->s_freeinodes_counter,
EXT4_INODES_PER_GROUP(sb) * flex_gd->count);
+ ext4_debug("free blocks count %llu",
+ percpu_counter_read(&sbi->s_freeclusters_counter));
if (EXT4_HAS_INCOMPAT_FEATURE(sb,
EXT4_FEATURE_INCOMPAT_FLEX_BG) &&
sbi->s_log_groups_per_flex) {
@@ -1349,16 +1455,24 @@ exit_journal:
err = err2;
if (!err) {
- int i;
+ int gdb_num = group / EXT4_DESC_PER_BLOCK(sb);
+ int gdb_num_end = ((group + flex_gd->count - 1) /
+ EXT4_DESC_PER_BLOCK(sb));
+ int meta_bg = EXT4_HAS_INCOMPAT_FEATURE(sb,
+ EXT4_FEATURE_INCOMPAT_META_BG);
+ sector_t old_gdb = 0;
+
update_backups(sb, sbi->s_sbh->b_blocknr, (char *)es,
- sizeof(struct ext4_super_block));
- for (i = 0; i < flex_gd->count; i++, group++) {
+ sizeof(struct ext4_super_block), 0);
+ for (; gdb_num <= gdb_num_end; gdb_num++) {
struct buffer_head *gdb_bh;
- int gdb_num;
- gdb_num = group / EXT4_BLOCKS_PER_GROUP(sb);
+
gdb_bh = sbi->s_group_desc[gdb_num];
+ if (old_gdb == gdb_bh->b_blocknr)
+ continue;
update_backups(sb, gdb_bh->b_blocknr, gdb_bh->b_data,
- gdb_bh->b_size);
+ gdb_bh->b_size, meta_bg);
+ old_gdb = gdb_bh->b_blocknr;
}
}
exit:
@@ -1402,9 +1516,7 @@ static int ext4_setup_next_flex_gd(struct super_block *sb,
group_data[i].group = group + i;
group_data[i].blocks_count = blocks_per_group;
- overhead = ext4_bg_has_super(sb, group + i) ?
- (1 + ext4_bg_num_gdb(sb, group + i) +
- le16_to_cpu(es->s_reserved_gdt_blocks)) : 0;
+ overhead = ext4_group_overhead_blocks(sb, group + i);
group_data[i].free_blocks_count = blocks_per_group - overhead;
if (ext4_has_group_desc_csum(sb))
flex_gd->bg_flags[i] = EXT4_BG_BLOCK_UNINIT |
@@ -1492,6 +1604,14 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
if (err)
goto out;
+ err = ext4_alloc_flex_bg_array(sb, input->group + 1);
+ if (err)
+ return err;
+
+ err = ext4_mb_alloc_groupinfo(sb, input->group + 1);
+ if (err)
+ goto out;
+
flex_gd.count = 1;
flex_gd.groups = input;
flex_gd.bg_flags = &bg_flags;
@@ -1544,11 +1664,13 @@ errout:
err = err2;
if (!err) {
+ ext4_fsblk_t first_block;
+ first_block = ext4_group_first_block_no(sb, 0);
if (test_opt(sb, DEBUG))
printk(KERN_DEBUG "EXT4-fs: extended group to %llu "
"blocks\n", ext4_blocks_count(es));
- update_backups(sb, EXT4_SB(sb)->s_sbh->b_blocknr, (char *)es,
- sizeof(struct ext4_super_block));
+ update_backups(sb, EXT4_SB(sb)->s_sbh->b_blocknr - first_block,
+ (char *)es, sizeof(struct ext4_super_block), 0);
}
return err;
}
@@ -1631,6 +1753,94 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es,
return err;
} /* ext4_group_extend */
+
+static int num_desc_blocks(struct super_block *sb, ext4_group_t groups)
+{
+ return (groups + EXT4_DESC_PER_BLOCK(sb) - 1) / EXT4_DESC_PER_BLOCK(sb);
+}
+
+/*
+ * Release the resize inode and drop the resize_inode feature if there
+ * are no more reserved gdt blocks, and then convert the file system
+ * to enable meta_bg
+ */
+static int ext4_convert_meta_bg(struct super_block *sb, struct inode *inode)
+{
+ handle_t *handle;
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ struct ext4_super_block *es = sbi->s_es;
+ struct ext4_inode_info *ei = EXT4_I(inode);
+ ext4_fsblk_t nr;
+ int i, ret, err = 0;
+ int credits = 1;
+
+ ext4_msg(sb, KERN_INFO, "Converting file system to meta_bg");
+ if (inode) {
+ if (es->s_reserved_gdt_blocks) {
+ ext4_error(sb, "Unexpected non-zero "
+ "s_reserved_gdt_blocks");
+ return -EPERM;
+ }
+
+ /* Do a quick sanity check of the resize inode */
+ if (inode->i_blocks != 1 << (inode->i_blkbits - 9))
+ goto invalid_resize_inode;
+ for (i = 0; i < EXT4_N_BLOCKS; i++) {
+ if (i == EXT4_DIND_BLOCK) {
+ if (ei->i_data[i])
+ continue;
+ else
+ goto invalid_resize_inode;
+ }
+ if (ei->i_data[i])
+ goto invalid_resize_inode;
+ }
+ credits += 3; /* block bitmap, bg descriptor, resize inode */
+ }
+
+ handle = ext4_journal_start_sb(sb, credits);
+ if (IS_ERR(handle))
+ return PTR_ERR(handle);
+
+ err = ext4_journal_get_write_access(handle, sbi->s_sbh);
+ if (err)
+ goto errout;
+
+ EXT4_CLEAR_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_RESIZE_INODE);
+ EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG);
+ sbi->s_es->s_first_meta_bg =
+ cpu_to_le32(num_desc_blocks(sb, sbi->s_groups_count));
+
+ err = ext4_handle_dirty_super(handle, sb);
+ if (err) {
+ ext4_std_error(sb, err);
+ goto errout;
+ }
+
+ if (inode) {
+ nr = le32_to_cpu(ei->i_data[EXT4_DIND_BLOCK]);
+ ext4_free_blocks(handle, inode, NULL, nr, 1,
+ EXT4_FREE_BLOCKS_METADATA |
+ EXT4_FREE_BLOCKS_FORGET);
+ ei->i_data[EXT4_DIND_BLOCK] = 0;
+ inode->i_blocks = 0;
+
+ err = ext4_mark_inode_dirty(handle, inode);
+ if (err)
+ ext4_std_error(sb, err);
+ }
+
+errout:
+ ret = ext4_journal_stop(handle);
+ if (!err)
+ err = ret;
+ return ret;
+
+invalid_resize_inode:
+ ext4_error(sb, "corrupted/inconsistent resize inode");
+ return -EINVAL;
+}
+
/*
* ext4_resize_fs() resizes a fs to new size specified by @n_blocks_count
*
@@ -1643,21 +1853,31 @@ int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count)
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_super_block *es = sbi->s_es;
struct buffer_head *bh;
- struct inode *resize_inode;
- ext4_fsblk_t o_blocks_count;
- ext4_group_t o_group;
- ext4_group_t n_group;
- ext4_grpblk_t offset, add;
+ struct inode *resize_inode = NULL;
+ ext4_grpblk_t add, offset;
unsigned long n_desc_blocks;
unsigned long o_desc_blocks;
- unsigned long desc_blocks;
- int err = 0, flexbg_size = 1;
+ ext4_group_t o_group;
+ ext4_group_t n_group;
+ ext4_fsblk_t o_blocks_count;
+ ext4_fsblk_t n_blocks_count_retry = 0;
+ unsigned long last_update_time = 0;
+ int err = 0, flexbg_size = 1 << sbi->s_log_groups_per_flex;
+ int meta_bg;
+ /* See if the device is actually as big as what was requested */
+ bh = sb_bread(sb, n_blocks_count - 1);
+ if (!bh) {
+ ext4_warning(sb, "can't read last block, resize aborted");
+ return -ENOSPC;
+ }
+ brelse(bh);
+
+retry:
o_blocks_count = ext4_blocks_count(es);
- if (test_opt(sb, DEBUG))
- ext4_msg(sb, KERN_DEBUG, "resizing filesystem from %llu "
- "to %llu blocks", o_blocks_count, n_blocks_count);
+ ext4_msg(sb, KERN_INFO, "resizing filesystem from %llu "
+ "to %llu blocks", o_blocks_count, n_blocks_count);
if (n_blocks_count < o_blocks_count) {
/* On-line shrinking not supported */
@@ -1672,32 +1892,49 @@ int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count)
ext4_get_group_no_and_offset(sb, n_blocks_count - 1, &n_group, &offset);
ext4_get_group_no_and_offset(sb, o_blocks_count - 1, &o_group, &offset);
- n_desc_blocks = (n_group + EXT4_DESC_PER_BLOCK(sb)) /
- EXT4_DESC_PER_BLOCK(sb);
- o_desc_blocks = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /
- EXT4_DESC_PER_BLOCK(sb);
- desc_blocks = n_desc_blocks - o_desc_blocks;
+ n_desc_blocks = num_desc_blocks(sb, n_group + 1);
+ o_desc_blocks = num_desc_blocks(sb, sbi->s_groups_count);
- if (desc_blocks &&
- (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_RESIZE_INODE) ||
- le16_to_cpu(es->s_reserved_gdt_blocks) < desc_blocks)) {
- ext4_warning(sb, "No reserved GDT blocks, can't resize");
- return -EPERM;
- }
+ meta_bg = EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG);
- resize_inode = ext4_iget(sb, EXT4_RESIZE_INO);
- if (IS_ERR(resize_inode)) {
- ext4_warning(sb, "Error opening resize inode");
- return PTR_ERR(resize_inode);
+ if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_RESIZE_INODE)) {
+ if (meta_bg) {
+ ext4_error(sb, "resize_inode and meta_bg enabled "
+ "simultaneously");
+ return -EINVAL;
+ }
+ if (n_desc_blocks > o_desc_blocks +
+ le16_to_cpu(es->s_reserved_gdt_blocks)) {
+ n_blocks_count_retry = n_blocks_count;
+ n_desc_blocks = o_desc_blocks +
+ le16_to_cpu(es->s_reserved_gdt_blocks);
+ n_group = n_desc_blocks * EXT4_DESC_PER_BLOCK(sb);
+ n_blocks_count = n_group * EXT4_BLOCKS_PER_GROUP(sb);
+ n_group--; /* set to last group number */
+ }
+
+ if (!resize_inode)
+ resize_inode = ext4_iget(sb, EXT4_RESIZE_INO);
+ if (IS_ERR(resize_inode)) {
+ ext4_warning(sb, "Error opening resize inode");
+ return PTR_ERR(resize_inode);
+ }
}
- /* See if the device is actually as big as what was requested */
- bh = sb_bread(sb, n_blocks_count - 1);
- if (!bh) {
- ext4_warning(sb, "can't read last block, resize aborted");
- return -ENOSPC;
+ if ((!resize_inode && !meta_bg) || n_blocks_count == o_blocks_count) {
+ err = ext4_convert_meta_bg(sb, resize_inode);
+ if (err)
+ goto out;
+ if (resize_inode) {
+ iput(resize_inode);
+ resize_inode = NULL;
+ }
+ if (n_blocks_count_retry) {
+ n_blocks_count = n_blocks_count_retry;
+ n_blocks_count_retry = 0;
+ goto retry;
+ }
}
- brelse(bh);
/* extend the last group */
if (n_group == o_group)
@@ -1710,12 +1947,15 @@ int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count)
goto out;
}
- if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG) &&
- es->s_log_groups_per_flex)
- flexbg_size = 1 << es->s_log_groups_per_flex;
+ if (ext4_blocks_count(es) == n_blocks_count)
+ goto out;
- o_blocks_count = ext4_blocks_count(es);
- if (o_blocks_count == n_blocks_count)
+ err = ext4_alloc_flex_bg_array(sb, n_group + 1);
+ if (err)
+ return err;
+
+ err = ext4_mb_alloc_groupinfo(sb, n_group + 1);
+ if (err)
goto out;
flex_gd = alloc_flex_gd(flexbg_size);
@@ -1729,19 +1969,33 @@ int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count)
*/
while (ext4_setup_next_flex_gd(sb, flex_gd, n_blocks_count,
flexbg_size)) {
- ext4_alloc_group_tables(sb, flex_gd, flexbg_size);
+ if (jiffies - last_update_time > HZ * 10) {
+ if (last_update_time)
+ ext4_msg(sb, KERN_INFO,
+ "resized to %llu blocks",
+ ext4_blocks_count(es));
+ last_update_time = jiffies;
+ }
+ if (ext4_alloc_group_tables(sb, flex_gd, flexbg_size) != 0)
+ break;
err = ext4_flex_group_add(sb, resize_inode, flex_gd);
if (unlikely(err))
break;
}
+ if (!err && n_blocks_count_retry) {
+ n_blocks_count = n_blocks_count_retry;
+ n_blocks_count_retry = 0;
+ free_flex_gd(flex_gd);
+ flex_gd = NULL;
+ goto retry;
+ }
+
out:
if (flex_gd)
free_flex_gd(flex_gd);
-
- iput(resize_inode);
- if (test_opt(sb, DEBUG))
- ext4_msg(sb, KERN_DEBUG, "resized filesystem from %llu "
- "upto %llu blocks", o_blocks_count, n_blocks_count);
+ if (resize_inode != NULL)
+ iput(resize_inode);
+ ext4_msg(sb, KERN_INFO, "resized filesystem to %llu", n_blocks_count);
return err;
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 69c55d4e4626..7265a0367476 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -420,7 +420,7 @@ static void __save_error_info(struct super_block *sb, const char *func,
*/
if (!es->s_error_count)
mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ);
- es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1);
+ le32_add_cpu(&es->s_error_count, 1);
}
static void save_error_info(struct super_block *sb, const char *func,
@@ -850,7 +850,6 @@ static void ext4_put_super(struct super_block *sb)
flush_workqueue(sbi->dio_unwritten_wq);
destroy_workqueue(sbi->dio_unwritten_wq);
- lock_super(sb);
if (sbi->s_journal) {
err = jbd2_journal_destroy(sbi->s_journal);
sbi->s_journal = NULL;
@@ -917,7 +916,6 @@ static void ext4_put_super(struct super_block *sb)
* Now that we are completely done shutting down the
* superblock, we need to actually destroy the kobject.
*/
- unlock_super(sb);
kobject_put(&sbi->s_kobj);
wait_for_completion(&sbi->s_kobj_unregister);
if (sbi->s_chksum_driver)
@@ -956,11 +954,10 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
ei->jinode = NULL;
INIT_LIST_HEAD(&ei->i_completed_io_list);
spin_lock_init(&ei->i_completed_io_lock);
- ei->cur_aio_dio = NULL;
ei->i_sync_tid = 0;
ei->i_datasync_tid = 0;
atomic_set(&ei->i_ioend_count, 0);
- atomic_set(&ei->i_aiodio_unwritten, 0);
+ atomic_set(&ei->i_unwritten, 0);
return &ei->vfs_inode;
}
@@ -1224,6 +1221,7 @@ enum {
Opt_inode_readahead_blks, Opt_journal_ioprio,
Opt_dioread_nolock, Opt_dioread_lock,
Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable,
+ Opt_max_dir_size_kb,
};
static const match_table_t tokens = {
@@ -1297,6 +1295,7 @@ static const match_table_t tokens = {
{Opt_init_itable, "init_itable=%u"},
{Opt_init_itable, "init_itable"},
{Opt_noinit_itable, "noinit_itable"},
+ {Opt_max_dir_size_kb, "max_dir_size_kb=%u"},
{Opt_removed, "check=none"}, /* mount option from ext2/3 */
{Opt_removed, "nocheck"}, /* mount option from ext2/3 */
{Opt_removed, "reservation"}, /* mount option from ext2/3 */
@@ -1477,6 +1476,7 @@ static const struct mount_opts {
{Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT},
{Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT},
{Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT},
+ {Opt_max_dir_size_kb, 0, MOPT_GTE0},
{Opt_err, 0, 0}
};
@@ -1592,6 +1592,8 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
if (!args->from)
arg = EXT4_DEF_LI_WAIT_MULT;
sbi->s_li_wait_mult = arg;
+ } else if (token == Opt_max_dir_size_kb) {
+ sbi->s_max_dir_size_kb = arg;
} else if (token == Opt_stripe) {
sbi->s_stripe = arg;
} else if (m->flags & MOPT_DATAJ) {
@@ -1664,7 +1666,7 @@ static int parse_options(char *options, struct super_block *sb,
* Initialize args struct so we know whether arg was
* found; some options take optional arguments.
*/
- args[0].to = args[0].from = 0;
+ args[0].to = args[0].from = NULL;
token = match_token(p, tokens, args);
if (handle_mount_opt(sb, p, token, args, journal_devnum,
journal_ioprio, is_remount) < 0)
@@ -1740,7 +1742,7 @@ static inline void ext4_show_quota_options(struct seq_file *seq,
static const char *token2str(int token)
{
- static const struct match_token *t;
+ const struct match_token *t;
for (t = tokens; t->token != Opt_err; t++)
if (t->token == token && !strchr(t->pattern, '='))
@@ -1823,6 +1825,8 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
if (nodefs || (test_opt(sb, INIT_INODE_TABLE) &&
(sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT)))
SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult);
+ if (nodefs || sbi->s_max_dir_size_kb)
+ SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb);
ext4_show_quota_options(seq, sb);
return 0;
@@ -1914,15 +1918,45 @@ done:
return res;
}
+int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ struct flex_groups *new_groups;
+ int size;
+
+ if (!sbi->s_log_groups_per_flex)
+ return 0;
+
+ size = ext4_flex_group(sbi, ngroup - 1) + 1;
+ if (size <= sbi->s_flex_groups_allocated)
+ return 0;
+
+ size = roundup_pow_of_two(size * sizeof(struct flex_groups));
+ new_groups = ext4_kvzalloc(size, GFP_KERNEL);
+ if (!new_groups) {
+ ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups",
+ size / (int) sizeof(struct flex_groups));
+ return -ENOMEM;
+ }
+
+ if (sbi->s_flex_groups) {
+ memcpy(new_groups, sbi->s_flex_groups,
+ (sbi->s_flex_groups_allocated *
+ sizeof(struct flex_groups)));
+ ext4_kvfree(sbi->s_flex_groups);
+ }
+ sbi->s_flex_groups = new_groups;
+ sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups);
+ return 0;
+}
+
static int ext4_fill_flex_info(struct super_block *sb)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_group_desc *gdp = NULL;
- ext4_group_t flex_group_count;
ext4_group_t flex_group;
unsigned int groups_per_flex = 0;
- size_t size;
- int i;
+ int i, err;
sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;
if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) {
@@ -1931,17 +1965,9 @@ static int ext4_fill_flex_info(struct super_block *sb)
}
groups_per_flex = 1 << sbi->s_log_groups_per_flex;
- /* We allocate both existing and potentially added groups */
- flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) +
- ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) <<
- EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex;
- size = flex_group_count * sizeof(struct flex_groups);
- sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL);
- if (sbi->s_flex_groups == NULL) {
- ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups",
- flex_group_count);
+ err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count);
+ if (err)
goto failed;
- }
for (i = 0; i < sbi->s_groups_count; i++) {
gdp = ext4_get_group_desc(sb, i, NULL);
@@ -2144,10 +2170,12 @@ static void ext4_orphan_cleanup(struct super_block *sb,
}
if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
- if (es->s_last_orphan)
+ /* don't clear list on RO mount w/ errors */
+ if (es->s_last_orphan && !(s_flags & MS_RDONLY)) {
jbd_debug(1, "Errors on filesystem, "
"clearing orphan list.\n");
- es->s_last_orphan = 0;
+ es->s_last_orphan = 0;
+ }
jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
return;
}
@@ -2528,6 +2556,7 @@ EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs);
EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request);
EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc);
EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump);
+EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb);
EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error);
static struct attribute *ext4_attrs[] = {
@@ -2543,6 +2572,7 @@ static struct attribute *ext4_attrs[] = {
ATTR_LIST(mb_stream_req),
ATTR_LIST(mb_group_prealloc),
ATTR_LIST(max_writeback_mb_bump),
+ ATTR_LIST(extent_max_zeroout_kb),
ATTR_LIST(trigger_fs_error),
NULL,
};
@@ -2550,10 +2580,12 @@ static struct attribute *ext4_attrs[] = {
/* Features this copy of ext4 supports */
EXT4_INFO_ATTR(lazy_itable_init);
EXT4_INFO_ATTR(batched_discard);
+EXT4_INFO_ATTR(meta_bg_resize);
static struct attribute *ext4_feat_attrs[] = {
ATTR_LIST(lazy_itable_init),
ATTR_LIST(batched_discard),
+ ATTR_LIST(meta_bg_resize),
NULL,
};
@@ -3374,7 +3406,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
* enable delayed allocation by default
* Use -o nodelalloc to turn it off
*/
- if (!IS_EXT3_SB(sb) &&
+ if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) &&
((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0))
set_opt(sb, DELALLOC);
@@ -3743,6 +3775,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_stripe = ext4_get_stripe_size(sbi);
sbi->s_max_writeback_mb_bump = 128;
+ sbi->s_extent_max_zeroout_kb = 32;
/*
* set up enough so that it can read an inode
@@ -4519,11 +4552,9 @@ static int ext4_unfreeze(struct super_block *sb)
if (sb->s_flags & MS_RDONLY)
return 0;
- lock_super(sb);
/* Reset the needs_recovery flag before the fs is unlocked. */
EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
ext4_commit_super(sb, 1);
- unlock_super(sb);
return 0;
}
@@ -4559,7 +4590,6 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
char *orig_data = kstrdup(data, GFP_KERNEL);
/* Store the original options */
- lock_super(sb);
old_sb_flags = sb->s_flags;
old_opts.s_mount_opt = sbi->s_mount_opt;
old_opts.s_mount_opt2 = sbi->s_mount_opt2;
@@ -4701,7 +4731,6 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
if (sbi->s_journal == NULL)
ext4_commit_super(sb, 1);
- unlock_super(sb);
#ifdef CONFIG_QUOTA
/* Release old quota file names */
for (i = 0; i < MAXQUOTAS; i++)
@@ -4714,10 +4743,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
else if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_QUOTA)) {
err = ext4_enable_quotas(sb);
- if (err) {
- lock_super(sb);
+ if (err)
goto restore_opts;
- }
}
}
#endif
@@ -4744,7 +4771,6 @@ restore_opts:
sbi->s_qf_names[i] = old_opts.s_qf_names[i];
}
#endif
- unlock_super(sb);
kfree(orig_data);
return err;
}
@@ -5269,8 +5295,10 @@ static int __init ext4_init_fs(void)
if (err)
goto out6;
ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj);
- if (!ext4_kset)
+ if (!ext4_kset) {
+ err = -ENOMEM;
goto out5;
+ }
ext4_proc_root = proc_mkdir("fs/ext4", NULL);
err = ext4_init_feat_adverts();
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 6d46c0d78338..8e1d7b9e4a33 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -63,6 +63,7 @@ int writeback_in_progress(struct backing_dev_info *bdi)
{
return test_bit(BDI_writeback_running, &bdi->state);
}
+EXPORT_SYMBOL(writeback_in_progress);
static inline struct backing_dev_info *inode_to_bdi(struct inode *inode)
{
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index af5280fb579b..3091d42992f0 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -1014,17 +1014,35 @@ restart_loop:
* there's no point in keeping a checkpoint record for
* it. */
- /* A buffer which has been freed while still being
- * journaled by a previous transaction may end up still
- * being dirty here, but we want to avoid writing back
- * that buffer in the future after the "add to orphan"
- * operation been committed, That's not only a performance
- * gain, it also stops aliasing problems if the buffer is
- * left behind for writeback and gets reallocated for another
- * use in a different page. */
- if (buffer_freed(bh) && !jh->b_next_transaction) {
- clear_buffer_freed(bh);
- clear_buffer_jbddirty(bh);
+ /*
+ * A buffer which has been freed while still being journaled by
+ * a previous transaction.
+ */
+ if (buffer_freed(bh)) {
+ /*
+ * If the running transaction is the one containing
+ * "add to orphan" operation (b_next_transaction !=
+ * NULL), we have to wait for that transaction to
+ * commit before we can really get rid of the buffer.
+ * So just clear b_modified to not confuse transaction
+ * credit accounting and refile the buffer to
+ * BJ_Forget of the running transaction. If the just
+ * committed transaction contains "add to orphan"
+ * operation, we can completely invalidate the buffer
+ * now. We are rather through in that since the
+ * buffer may be still accessible when blocksize <
+ * pagesize and it is attached to the last partial
+ * page.
+ */
+ jh->b_modified = 0;
+ if (!jh->b_next_transaction) {
+ clear_buffer_freed(bh);
+ clear_buffer_jbddirty(bh);
+ clear_buffer_mapped(bh);
+ clear_buffer_new(bh);
+ clear_buffer_req(bh);
+ bh->b_bdev = NULL;
+ }
}
if (buffer_jbddirty(bh)) {
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index e149b99a7ffb..484b8d1c6cb6 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1354,6 +1354,11 @@ static void jbd2_mark_journal_empty(journal_t *journal)
BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex));
read_lock(&journal->j_state_lock);
+ /* Is it already empty? */
+ if (sb->s_start == 0) {
+ read_unlock(&journal->j_state_lock);
+ return;
+ }
jbd_debug(1, "JBD2: Marking journal as empty (seq %d)\n",
journal->j_tail_sequence);
diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c
index 0131e4362534..626846bac32f 100644
--- a/fs/jbd2/recovery.c
+++ b/fs/jbd2/recovery.c
@@ -289,8 +289,11 @@ int jbd2_journal_recover(journal_t *journal)
if (!err)
err = err2;
/* Make sure all replayed data is on permanent storage */
- if (journal->j_flags & JBD2_BARRIER)
- blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL);
+ if (journal->j_flags & JBD2_BARRIER) {
+ err2 = blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL);
+ if (!err)
+ err = err2;
+ }
return err;
}
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index fb1ab9533b67..a74ba4659549 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -1841,15 +1841,16 @@ static int __dispose_buffer(struct journal_head *jh, transaction_t *transaction)
* We're outside-transaction here. Either or both of j_running_transaction
* and j_committing_transaction may be NULL.
*/
-static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
+static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh,
+ int partial_page)
{
transaction_t *transaction;
struct journal_head *jh;
int may_free = 1;
- int ret;
BUFFER_TRACE(bh, "entry");
+retry:
/*
* It is safe to proceed here without the j_list_lock because the
* buffers cannot be stolen by try_to_free_buffers as long as we are
@@ -1878,10 +1879,18 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
* clear the buffer dirty bit at latest at the moment when the
* transaction marking the buffer as freed in the filesystem
* structures is committed because from that moment on the
- * buffer can be reallocated and used by a different page.
+ * block can be reallocated and used by a different page.
* Since the block hasn't been freed yet but the inode has
* already been added to orphan list, it is safe for us to add
* the buffer to BJ_Forget list of the newest transaction.
+ *
+ * Also we have to clear buffer_mapped flag of a truncated buffer
+ * because the buffer_head may be attached to the page straddling
+ * i_size (can happen only when blocksize < pagesize) and thus the
+ * buffer_head can be reused when the file is extended again. So we end
+ * up keeping around invalidated buffers attached to transactions'
+ * BJ_Forget list just to stop checkpointing code from cleaning up
+ * the transaction this buffer was modified in.
*/
transaction = jh->b_transaction;
if (transaction == NULL) {
@@ -1908,13 +1917,9 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
* committed, the buffer won't be needed any
* longer. */
JBUFFER_TRACE(jh, "checkpointed: add to BJ_Forget");
- ret = __dispose_buffer(jh,
+ may_free = __dispose_buffer(jh,
journal->j_running_transaction);
- jbd2_journal_put_journal_head(jh);
- spin_unlock(&journal->j_list_lock);
- jbd_unlock_bh_state(bh);
- write_unlock(&journal->j_state_lock);
- return ret;
+ goto zap_buffer;
} else {
/* There is no currently-running transaction. So the
* orphan record which we wrote for this file must have
@@ -1922,13 +1927,9 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
* the committing transaction, if it exists. */
if (journal->j_committing_transaction) {
JBUFFER_TRACE(jh, "give to committing trans");
- ret = __dispose_buffer(jh,
+ may_free = __dispose_buffer(jh,
journal->j_committing_transaction);
- jbd2_journal_put_journal_head(jh);
- spin_unlock(&journal->j_list_lock);
- jbd_unlock_bh_state(bh);
- write_unlock(&journal->j_state_lock);
- return ret;
+ goto zap_buffer;
} else {
/* The orphan record's transaction has
* committed. We can cleanse this buffer */
@@ -1940,10 +1941,24 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
JBUFFER_TRACE(jh, "on committing transaction");
/*
* The buffer is committing, we simply cannot touch
- * it. So we just set j_next_transaction to the
- * running transaction (if there is one) and mark
- * buffer as freed so that commit code knows it should
- * clear dirty bits when it is done with the buffer.
+ * it. If the page is straddling i_size we have to wait
+ * for commit and try again.
+ */
+ if (partial_page) {
+ tid_t tid = journal->j_committing_transaction->t_tid;
+
+ jbd2_journal_put_journal_head(jh);
+ spin_unlock(&journal->j_list_lock);
+ jbd_unlock_bh_state(bh);
+ write_unlock(&journal->j_state_lock);
+ jbd2_log_wait_commit(journal, tid);
+ goto retry;
+ }
+ /*
+ * OK, buffer won't be reachable after truncate. We just set
+ * j_next_transaction to the running transaction (if there is
+ * one) and mark buffer as freed so that commit code knows it
+ * should clear dirty bits when it is done with the buffer.
*/
set_buffer_freed(bh);
if (journal->j_running_transaction && buffer_jbddirty(bh))
@@ -1966,6 +1981,15 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
}
zap_buffer:
+ /*
+ * This is tricky. Although the buffer is truncated, it may be reused
+ * if blocksize < pagesize and it is attached to the page straddling
+ * EOF. Since the buffer might have been added to BJ_Forget list of the
+ * running transaction, journal_get_write_access() won't clear
+ * b_modified and credit accounting gets confused. So clear b_modified
+ * here.
+ */
+ jh->b_modified = 0;
jbd2_journal_put_journal_head(jh);
zap_buffer_no_jh:
spin_unlock(&journal->j_list_lock);
@@ -2017,7 +2041,8 @@ void jbd2_journal_invalidatepage(journal_t *journal,
if (offset <= curr_off) {
/* This block is wholly outside the truncation point */
lock_buffer(bh);
- may_free &= journal_unmap_buffer(journal, bh);
+ may_free &= journal_unmap_buffer(journal, bh,
+ offset > 0);
unlock_buffer(bh);
}
curr_off = next_off;
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index a4d56ac02e6c..5b387a4c293e 100644
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -116,6 +116,7 @@ static int nilfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
if (unlikely(ret))
goto out;
+ file_update_time(vma->vm_file);
ret = __block_page_mkwrite(vma, vmf, nilfs_get_block);
if (ret) {
nilfs_transaction_abort(inode->i_sb);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.