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);
return merge_done;
}
+/*
+ * 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);
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);
}
/*
nearex->ee_len = newext->ee_len;
merge:
- /* try to merge extents to the right */
+ /* 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);
- /* try to merge extents to the left */
/* time to correct all indexes above */
err = ext4_ext_correct_indexes(handle, inode, path);
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) {
}
/*
- * 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
*
* 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;
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);
return ret;
}
-/*
- * 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.
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
{
struct super_block *sb = inode->i_sb;
int depth = ext_depth(inode);
- struct ext4_ext_path *path;
+ struct ext4_ext_path *path = NULL;
ext4_fsblk_t partial_cluster = 0;
handle_t *handle;
- int i, err;
+ int i = 0, err;
ext_debug("truncate since %u to %u\n", start, end);
}
depth = ext_depth(inode);
ex = path[depth].p_ext;
- if (!ex)
+ if (!ex) {
+ ext4_ext_drop_refs(path);
+ kfree(path);
+ path = NULL;
goto cont;
+ }
ee_block = le32_to_cpu(ex->ee_block);
if (err < 0)
goto out;
}
- ext4_ext_drop_refs(path);
- kfree(path);
}
cont:
* after i_size and walking into the tree depth-wise.
*/
depth = ext_depth(inode);
- path = kzalloc(sizeof(struct ext4_ext_path) * (depth + 1), GFP_NOFS);
- if (path == NULL) {
- ext4_journal_stop(handle);
- return -ENOMEM;
- }
- path[0].p_depth = depth;
- path[0].p_hdr = ext_inode_hdr(inode);
+ if (path) {
+ int k = i = depth;
+ while (--k > 0)
+ path[k].p_block =
+ le16_to_cpu(path[k].p_hdr->eh_entries)+1;
+ } else {
+ path = kzalloc(sizeof(struct ext4_ext_path) * (depth + 1),
+ GFP_NOFS);
+ if (path == NULL) {
+ ext4_journal_stop(handle);
+ return -ENOMEM;
+ }
+ path[0].p_depth = depth;
+ path[0].p_hdr = ext_inode_hdr(inode);
+ i = 0;
- if (ext4_ext_check(inode, path[0].p_hdr, depth)) {
- err = -EIO;
- goto out;
+ if (ext4_ext_check(inode, path[0].p_hdr, depth)) {
+ err = -EIO;
+ goto out;
+ }
}
- i = err = 0;
+ err = 0;
while (i >= 0 && err == 0) {
if (i == depth) {
out:
ext4_ext_drop_refs(path);
kfree(path);
- if (err == -EAGAIN)
+ if (err == -EAGAIN) {
+ path = NULL;
goto again;
+ }
ext4_journal_stop(handle);
return err;
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;
}
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;
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
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;
"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)
*/
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;
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;
}
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);
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;
}
allocated = ext4_split_extent(handle, inode, path,
- &split_map, split_flag, 0);
+ &split_map, split_flag, 0);
if (allocated < 0)
err = allocated;
* 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
/* 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;
{
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",
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
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);
* 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;
}
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;
ext4_falloc_update_inode(inode, mode, new_size,
(map.m_flags & EXT4_MAP_NEW));
ext4_mark_inode_dirty(handle, inode);
+ if ((file->f_flags & O_SYNC) && ret >= max_blocks)
+ ext4_handle_sync(handle);
ret2 = ext4_journal_stop(handle);
if (ret2)
break;
if (IS_ERR(handle))
return PTR_ERR(handle);
- err = ext4_orphan_add(handle, inode);
- if (err)
- goto out;
/*
* Now we need to zero out the non-page-aligned data in the
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);
projects / firefly-linux-kernel-4.4.55.git / blobdiff