}
#endif
-/*
- * Calculate the number of metadata blocks need to reserve
- * to allocate a block located at @lblock
- */
-static int ext4_calc_metadata_amount(struct inode *inode, ext4_lblk_t lblock)
-{
- if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
- return ext4_ext_calc_metadata_amount(inode, lblock);
-
- return ext4_ind_calc_metadata_amount(inode, lblock);
-}
-
/*
* Called with i_data_sem down, which is important since we can call
* ext4_discard_preallocations() from here.
used = ei->i_reserved_data_blocks;
}
- if (unlikely(ei->i_allocated_meta_blocks > ei->i_reserved_meta_blocks)) {
- ext4_warning(inode->i_sb, "ino %lu, allocated %d "
- "with only %d reserved metadata blocks "
- "(releasing %d blocks with reserved %d data blocks)",
- inode->i_ino, ei->i_allocated_meta_blocks,
- ei->i_reserved_meta_blocks, used,
- ei->i_reserved_data_blocks);
- WARN_ON(1);
- ei->i_allocated_meta_blocks = ei->i_reserved_meta_blocks;
- }
-
/* Update per-inode reservations */
ei->i_reserved_data_blocks -= used;
- ei->i_reserved_meta_blocks -= ei->i_allocated_meta_blocks;
- percpu_counter_sub(&sbi->s_dirtyclusters_counter,
- used + ei->i_allocated_meta_blocks);
- ei->i_allocated_meta_blocks = 0;
+ percpu_counter_sub(&sbi->s_dirtyclusters_counter, used);
- if (ei->i_reserved_data_blocks == 0) {
- /*
- * We can release all of the reserved metadata blocks
- * only when we have written all of the delayed
- * allocation blocks.
- */
- percpu_counter_sub(&sbi->s_dirtyclusters_counter,
- ei->i_reserved_meta_blocks);
- ei->i_reserved_meta_blocks = 0;
- ei->i_da_metadata_calc_len = 0;
- }
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
/* Update quota subsystem for data blocks */
* `handle' can be NULL if create is zero
*/
struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode,
- ext4_lblk_t block, int create, int *errp)
+ ext4_lblk_t block, int create)
{
struct ext4_map_blocks map;
struct buffer_head *bh;
- int fatal = 0, err;
+ int err;
J_ASSERT(handle != NULL || create == 0);
err = ext4_map_blocks(handle, inode, &map,
create ? EXT4_GET_BLOCKS_CREATE : 0);
- /* ensure we send some value back into *errp */
- *errp = 0;
-
- if (create && err == 0)
- err = -ENOSPC; /* should never happen */
+ if (err == 0)
+ return create ? ERR_PTR(-ENOSPC) : NULL;
if (err < 0)
- *errp = err;
- if (err <= 0)
- return NULL;
+ return ERR_PTR(err);
bh = sb_getblk(inode->i_sb, map.m_pblk);
- if (unlikely(!bh)) {
- *errp = -ENOMEM;
- return NULL;
- }
+ if (unlikely(!bh))
+ return ERR_PTR(-ENOMEM);
if (map.m_flags & EXT4_MAP_NEW) {
J_ASSERT(create != 0);
J_ASSERT(handle != NULL);
*/
lock_buffer(bh);
BUFFER_TRACE(bh, "call get_create_access");
- fatal = ext4_journal_get_create_access(handle, bh);
- if (!fatal && !buffer_uptodate(bh)) {
+ err = ext4_journal_get_create_access(handle, bh);
+ if (unlikely(err)) {
+ unlock_buffer(bh);
+ goto errout;
+ }
+ if (!buffer_uptodate(bh)) {
memset(bh->b_data, 0, inode->i_sb->s_blocksize);
set_buffer_uptodate(bh);
}
unlock_buffer(bh);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, inode, bh);
- if (!fatal)
- fatal = err;
- } else {
+ if (unlikely(err))
+ goto errout;
+ } else
BUFFER_TRACE(bh, "not a new buffer");
- }
- if (fatal) {
- *errp = fatal;
- brelse(bh);
- bh = NULL;
- }
return bh;
+errout:
+ brelse(bh);
+ return ERR_PTR(err);
}
struct buffer_head *ext4_bread(handle_t *handle, struct inode *inode,
- ext4_lblk_t block, int create, int *err)
+ ext4_lblk_t block, int create)
{
struct buffer_head *bh;
- bh = ext4_getblk(handle, inode, block, create, err);
- if (!bh)
+ bh = ext4_getblk(handle, inode, block, create);
+ if (IS_ERR(bh))
return bh;
- if (buffer_uptodate(bh))
+ if (!bh || buffer_uptodate(bh))
return bh;
ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &bh);
wait_on_buffer(bh);
if (buffer_uptodate(bh))
return bh;
put_bh(bh);
- *err = -EIO;
- return NULL;
+ return ERR_PTR(-EIO);
}
int ext4_walk_page_buffers(handle_t *handle,
} else
copied = block_write_end(file, mapping, pos,
len, copied, page, fsdata);
-
/*
- * No need to use i_size_read() here, the i_size
- * cannot change under us because we hole i_mutex.
- *
- * But it's important to update i_size while still holding page lock:
+ * it's important to update i_size while still holding page lock:
* page writeout could otherwise come in and zero beyond i_size.
*/
- if (pos + copied > inode->i_size) {
- i_size_write(inode, pos + copied);
- i_size_changed = 1;
- }
-
- if (pos + copied > EXT4_I(inode)->i_disksize) {
- /* We need to mark inode dirty even if
- * new_i_size is less that inode->i_size
- * but greater than i_disksize. (hint delalloc)
- */
- ext4_update_i_disksize(inode, (pos + copied));
- i_size_changed = 1;
- }
+ i_size_changed = ext4_update_inode_size(inode, pos + copied);
unlock_page(page);
page_cache_release(page);
int ret = 0, ret2;
int partial = 0;
unsigned from, to;
- loff_t new_i_size;
+ int size_changed = 0;
trace_ext4_journalled_write_end(inode, pos, len, copied);
from = pos & (PAGE_CACHE_SIZE - 1);
if (!partial)
SetPageUptodate(page);
}
- new_i_size = pos + copied;
- if (new_i_size > inode->i_size)
- i_size_write(inode, pos+copied);
+ size_changed = ext4_update_inode_size(inode, pos + copied);
ext4_set_inode_state(inode, EXT4_STATE_JDATA);
EXT4_I(inode)->i_datasync_tid = handle->h_transaction->t_tid;
- if (new_i_size > EXT4_I(inode)->i_disksize) {
- ext4_update_i_disksize(inode, new_i_size);
+ unlock_page(page);
+ page_cache_release(page);
+
+ if (size_changed) {
ret2 = ext4_mark_inode_dirty(handle, inode);
if (!ret)
ret = ret2;
}
- unlock_page(page);
- page_cache_release(page);
if (pos + len > inode->i_size && ext4_can_truncate(inode))
/* if we have allocated more blocks and copied
* less. We will have blocks allocated outside
return ret ? ret : copied;
}
-/*
- * Reserve a metadata for a single block located at lblock
- */
-static int ext4_da_reserve_metadata(struct inode *inode, ext4_lblk_t lblock)
-{
- struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
- struct ext4_inode_info *ei = EXT4_I(inode);
- unsigned int md_needed;
- ext4_lblk_t save_last_lblock;
- int save_len;
-
- /*
- * recalculate the amount of metadata blocks to reserve
- * in order to allocate nrblocks
- * worse case is one extent per block
- */
- spin_lock(&ei->i_block_reservation_lock);
- /*
- * ext4_calc_metadata_amount() has side effects, which we have
- * to be prepared undo if we fail to claim space.
- */
- save_len = ei->i_da_metadata_calc_len;
- save_last_lblock = ei->i_da_metadata_calc_last_lblock;
- md_needed = EXT4_NUM_B2C(sbi,
- ext4_calc_metadata_amount(inode, lblock));
- trace_ext4_da_reserve_space(inode, md_needed);
-
- /*
- * We do still charge estimated metadata to the sb though;
- * we cannot afford to run out of free blocks.
- */
- if (ext4_claim_free_clusters(sbi, md_needed, 0)) {
- ei->i_da_metadata_calc_len = save_len;
- ei->i_da_metadata_calc_last_lblock = save_last_lblock;
- spin_unlock(&ei->i_block_reservation_lock);
- return -ENOSPC;
- }
- ei->i_reserved_meta_blocks += md_needed;
- spin_unlock(&ei->i_block_reservation_lock);
-
- return 0; /* success */
-}
-
/*
* Reserve a single cluster located at lblock
*/
struct ext4_inode_info *ei = EXT4_I(inode);
unsigned int md_needed;
int ret;
- ext4_lblk_t save_last_lblock;
- int save_len;
/*
* We will charge metadata quota at writeout time; this saves
* ext4_calc_metadata_amount() has side effects, which we have
* to be prepared undo if we fail to claim space.
*/
- save_len = ei->i_da_metadata_calc_len;
- save_last_lblock = ei->i_da_metadata_calc_last_lblock;
- md_needed = EXT4_NUM_B2C(sbi,
- ext4_calc_metadata_amount(inode, lblock));
- trace_ext4_da_reserve_space(inode, md_needed);
+ md_needed = 0;
+ trace_ext4_da_reserve_space(inode, 0);
- /*
- * We do still charge estimated metadata to the sb though;
- * we cannot afford to run out of free blocks.
- */
- if (ext4_claim_free_clusters(sbi, md_needed + 1, 0)) {
- ei->i_da_metadata_calc_len = save_len;
- ei->i_da_metadata_calc_last_lblock = save_last_lblock;
+ if (ext4_claim_free_clusters(sbi, 1, 0)) {
spin_unlock(&ei->i_block_reservation_lock);
dquot_release_reservation_block(inode, EXT4_C2B(sbi, 1));
return -ENOSPC;
}
ei->i_reserved_data_blocks++;
- ei->i_reserved_meta_blocks += md_needed;
spin_unlock(&ei->i_block_reservation_lock);
return 0; /* success */
}
ei->i_reserved_data_blocks -= to_free;
- if (ei->i_reserved_data_blocks == 0) {
- /*
- * We can release all of the reserved metadata blocks
- * only when we have written all of the delayed
- * allocation blocks.
- * Note that in case of bigalloc, i_reserved_meta_blocks,
- * i_reserved_data_blocks, etc. refer to number of clusters.
- */
- percpu_counter_sub(&sbi->s_dirtyclusters_counter,
- ei->i_reserved_meta_blocks);
- ei->i_reserved_meta_blocks = 0;
- ei->i_da_metadata_calc_len = 0;
- }
-
/* update fs dirty data blocks counter */
percpu_counter_sub(&sbi->s_dirtyclusters_counter, to_free);
ext4_msg(sb, KERN_CRIT, "Block reservation details");
ext4_msg(sb, KERN_CRIT, "i_reserved_data_blocks=%u",
ei->i_reserved_data_blocks);
- ext4_msg(sb, KERN_CRIT, "i_reserved_meta_blocks=%u",
- ei->i_reserved_meta_blocks);
- ext4_msg(sb, KERN_CRIT, "i_allocated_meta_blocks=%u",
- ei->i_allocated_meta_blocks);
return;
}
retval = ret;
goto out_unlock;
}
- } else {
- ret = ext4_da_reserve_metadata(inode, iblock);
- if (ret) {
- /* not enough space to reserve */
- retval = ret;
- goto out_unlock;
- }
}
ret = ext4_es_insert_extent(inode, map->m_lblk, map->m_len,
struct ext4_map_blocks *map = &mpd->map;
int err;
loff_t disksize;
+ int progress = 0;
mpd->io_submit.io_end->offset =
((loff_t)map->m_lblk) << inode->i_blkbits;
* is non-zero, a commit should free up blocks.
*/
if ((err == -ENOMEM) ||
- (err == -ENOSPC && ext4_count_free_clusters(sb)))
+ (err == -ENOSPC && ext4_count_free_clusters(sb))) {
+ if (progress)
+ goto update_disksize;
return err;
+ }
ext4_msg(sb, KERN_CRIT,
"Delayed block allocation failed for "
"inode %lu at logical offset %llu with"
*give_up_on_write = true;
return err;
}
+ progress = 1;
/*
* Update buffer state, submit mapped pages, and get us new
* extent to map
*/
err = mpage_map_and_submit_buffers(mpd);
if (err < 0)
- return err;
+ goto update_disksize;
} while (map->m_len);
+update_disksize:
/*
* Update on-disk size after IO is submitted. Races with
* truncate are avoided by checking i_size under i_data_sem.
if (copied && new_i_size > EXT4_I(inode)->i_disksize) {
if (ext4_has_inline_data(inode) ||
ext4_da_should_update_i_disksize(page, end)) {
- down_write(&EXT4_I(inode)->i_data_sem);
- if (new_i_size > EXT4_I(inode)->i_disksize)
- EXT4_I(inode)->i_disksize = new_i_size;
- up_write(&EXT4_I(inode)->i_data_sem);
+ ext4_update_i_disksize(inode, new_i_size);
/* We need to mark inode dirty even if
* new_i_size is less that inode->i_size
* bu greater than i_disksize.(hint delalloc)
{
trace_ext4_alloc_da_blocks(inode);
- if (!EXT4_I(inode)->i_reserved_data_blocks &&
- !EXT4_I(inode)->i_reserved_meta_blocks)
+ if (!EXT4_I(inode)->i_reserved_data_blocks)
return 0;
/*
ret = ext4_ext_remove_space(inode, first_block,
stop_block - 1);
else
- ret = ext4_free_hole_blocks(handle, inode, first_block,
+ ret = ext4_ind_remove_space(handle, inode, first_block,
stop_block);
up_write(&EXT4_I(inode)->i_data_sem);
projects / firefly-linux-kernel-4.4.55.git / blobdiff