ext4: drop EXT4_EX_NOFREE_ON_ERR from rest of extents handling code
Drop EXT4_EX_NOFREE_ON_ERR from ext4_ext_create_new_leaf(), ext4_split_extent(), ext4_convert_unwritten_extents_endio(). This requires fixing all of their callers to potentially ext4_ext_find_extent() to free the struct ext4_ext_path object in case of an error, and there are interlocking dependencies all the way up to ext4_ext_map_blocks(), ext4_swap_extents(), and ext4_ext_remove_space(). Once this is done, we can drop the EXT4_EX_NOFREE_ON_ERR flag since it is no longer necessary. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
parent
4f224b8b7b
commit
dfe5080939
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@ -582,7 +582,6 @@ enum {
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*/
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#define EXT4_EX_NOCACHE 0x0800
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#define EXT4_EX_FORCE_CACHE 0x1000
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#define EXT4_EX_NOFREE_ON_ERR 0x2000
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/*
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* Flags used by ext4_free_blocks
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@ -2731,7 +2730,7 @@ extern int ext4_can_extents_be_merged(struct inode *inode,
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struct ext4_extent *ex1,
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struct ext4_extent *ex2);
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extern int ext4_ext_insert_extent(handle_t *, struct inode *,
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struct ext4_ext_path *,
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struct ext4_ext_path **,
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struct ext4_extent *, int);
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extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t,
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struct ext4_ext_path **,
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@ -98,14 +98,14 @@ static void ext4_extent_block_csum_set(struct inode *inode,
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static int ext4_split_extent(handle_t *handle,
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struct inode *inode,
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struct ext4_ext_path *path,
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struct ext4_ext_path **ppath,
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struct ext4_map_blocks *map,
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int split_flag,
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int flags);
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static int ext4_split_extent_at(handle_t *handle,
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struct inode *inode,
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struct ext4_ext_path *path,
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struct ext4_ext_path **ppath,
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ext4_lblk_t split,
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int split_flag,
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int flags);
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@ -293,12 +293,13 @@ static inline int ext4_ext_space_root_idx(struct inode *inode, int check)
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static inline int
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ext4_force_split_extent_at(handle_t *handle, struct inode *inode,
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struct ext4_ext_path *path, ext4_lblk_t lblk,
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struct ext4_ext_path **ppath, ext4_lblk_t lblk,
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int nofail)
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{
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struct ext4_ext_path *path = *ppath;
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int unwritten = ext4_ext_is_unwritten(path[path->p_depth].p_ext);
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return ext4_split_extent_at(handle, inode, path, lblk, unwritten ?
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return ext4_split_extent_at(handle, inode, ppath, lblk, unwritten ?
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EXT4_EXT_MARK_UNWRIT1|EXT4_EXT_MARK_UNWRIT2 : 0,
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EXT4_EX_NOCACHE | EXT4_GET_BLOCKS_PRE_IO |
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(nofail ? EXT4_GET_BLOCKS_METADATA_NOFAIL:0));
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@ -861,7 +862,6 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
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struct buffer_head *bh;
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struct ext4_ext_path *path = orig_path ? *orig_path : NULL;
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short int depth, i, ppos = 0;
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short free_on_err = (flags & EXT4_EX_NOFREE_ON_ERR) == 0;
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int ret;
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eh = ext_inode_hdr(inode);
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@ -873,7 +873,6 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
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GFP_NOFS);
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if (unlikely(!path))
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return ERR_PTR(-ENOMEM);
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free_on_err = 1;
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}
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path[0].p_hdr = eh;
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path[0].p_bh = NULL;
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@ -925,11 +924,9 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
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err:
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ext4_ext_drop_refs(path);
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if (free_on_err) {
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kfree(path);
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if (orig_path)
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*orig_path = NULL;
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}
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return ERR_PTR(ret);
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}
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@ -1332,9 +1329,10 @@ out:
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static int ext4_ext_create_new_leaf(handle_t *handle, struct inode *inode,
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unsigned int mb_flags,
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unsigned int gb_flags,
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struct ext4_ext_path *path,
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struct ext4_ext_path **ppath,
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struct ext4_extent *newext)
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{
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struct ext4_ext_path *path = *ppath;
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struct ext4_ext_path *curp;
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int depth, i, err = 0;
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@ -1361,7 +1359,7 @@ repeat:
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ext4_ext_drop_refs(path);
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path = ext4_ext_find_extent(inode,
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(ext4_lblk_t)le32_to_cpu(newext->ee_block),
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&path, gb_flags | EXT4_EX_NOFREE_ON_ERR);
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ppath, gb_flags);
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if (IS_ERR(path))
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err = PTR_ERR(path);
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} else {
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@ -1374,7 +1372,7 @@ repeat:
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ext4_ext_drop_refs(path);
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path = ext4_ext_find_extent(inode,
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(ext4_lblk_t)le32_to_cpu(newext->ee_block),
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&path, gb_flags | EXT4_EX_NOFREE_ON_ERR);
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ppath, gb_flags);
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if (IS_ERR(path)) {
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err = PTR_ERR(path);
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goto out;
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@ -1914,9 +1912,10 @@ out:
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* creating new leaf in the no-space case.
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*/
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int ext4_ext_insert_extent(handle_t *handle, struct inode *inode,
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struct ext4_ext_path *path,
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struct ext4_ext_path **ppath,
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struct ext4_extent *newext, int gb_flags)
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{
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struct ext4_ext_path *path = *ppath;
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struct ext4_extent_header *eh;
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struct ext4_extent *ex, *fex;
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struct ext4_extent *nearex; /* nearest extent */
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@ -2048,7 +2047,7 @@ prepend:
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if (gb_flags & EXT4_GET_BLOCKS_METADATA_NOFAIL)
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mb_flags = EXT4_MB_USE_RESERVED;
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err = ext4_ext_create_new_leaf(handle, inode, mb_flags, gb_flags,
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path, newext);
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ppath, newext);
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if (err)
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goto cleanup;
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depth = ext_depth(inode);
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@ -2878,7 +2877,7 @@ again:
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* fail removing space due to ENOSPC so try to use
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* reserved block if that happens.
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*/
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err = ext4_force_split_extent_at(handle, inode, path,
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err = ext4_force_split_extent_at(handle, inode, &path,
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end + 1, 1);
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if (err < 0)
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goto out;
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@ -3019,12 +3018,13 @@ again:
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}
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}
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out:
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if (path) {
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ext4_ext_drop_refs(path);
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kfree(path);
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if (err == -EAGAIN) {
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path = NULL;
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goto again;
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}
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if (err == -EAGAIN)
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goto again;
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ext4_journal_stop(handle);
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return err;
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@ -3138,11 +3138,12 @@ static int ext4_ext_zeroout(struct inode *inode, struct ext4_extent *ex)
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*/
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static int ext4_split_extent_at(handle_t *handle,
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struct inode *inode,
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struct ext4_ext_path *path,
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struct ext4_ext_path **ppath,
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ext4_lblk_t split,
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int split_flag,
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int flags)
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{
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struct ext4_ext_path *path = *ppath;
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ext4_fsblk_t newblock;
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ext4_lblk_t ee_block;
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struct ext4_extent *ex, newex, orig_ex, zero_ex;
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@ -3213,7 +3214,7 @@ static int ext4_split_extent_at(handle_t *handle,
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if (split_flag & EXT4_EXT_MARK_UNWRIT2)
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ext4_ext_mark_unwritten(ex2);
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err = ext4_ext_insert_extent(handle, inode, path, &newex, flags);
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err = ext4_ext_insert_extent(handle, inode, ppath, &newex, flags);
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if (err == -ENOSPC && (EXT4_EXT_MAY_ZEROOUT & split_flag)) {
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if (split_flag & (EXT4_EXT_DATA_VALID1|EXT4_EXT_DATA_VALID2)) {
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if (split_flag & EXT4_EXT_DATA_VALID1) {
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@ -3279,11 +3280,12 @@ fix_extent_len:
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*/
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static int ext4_split_extent(handle_t *handle,
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struct inode *inode,
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struct ext4_ext_path *path,
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struct ext4_ext_path **ppath,
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struct ext4_map_blocks *map,
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int split_flag,
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int flags)
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{
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struct ext4_ext_path *path = *ppath;
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ext4_lblk_t ee_block;
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struct ext4_extent *ex;
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unsigned int ee_len, depth;
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@ -3306,7 +3308,7 @@ static int ext4_split_extent(handle_t *handle,
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EXT4_EXT_MARK_UNWRIT2;
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if (split_flag & EXT4_EXT_DATA_VALID2)
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split_flag1 |= EXT4_EXT_DATA_VALID1;
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err = ext4_split_extent_at(handle, inode, path,
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err = ext4_split_extent_at(handle, inode, ppath,
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map->m_lblk + map->m_len, split_flag1, flags1);
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if (err)
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goto out;
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@ -3318,8 +3320,7 @@ static int ext4_split_extent(handle_t *handle,
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* result in split of original leaf or extent zeroout.
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*/
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ext4_ext_drop_refs(path);
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path = ext4_ext_find_extent(inode, map->m_lblk, &path,
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EXT4_EX_NOFREE_ON_ERR);
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path = ext4_ext_find_extent(inode, map->m_lblk, ppath, 0);
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if (IS_ERR(path))
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return PTR_ERR(path);
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depth = ext_depth(inode);
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@ -3339,7 +3340,7 @@ static int ext4_split_extent(handle_t *handle,
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split_flag1 |= split_flag & (EXT4_EXT_MAY_ZEROOUT |
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EXT4_EXT_MARK_UNWRIT2);
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}
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err = ext4_split_extent_at(handle, inode, path,
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err = ext4_split_extent_at(handle, inode, ppath,
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map->m_lblk, split_flag1, flags);
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if (err)
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goto out;
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@ -3373,9 +3374,10 @@ out:
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static int ext4_ext_convert_to_initialized(handle_t *handle,
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struct inode *inode,
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struct ext4_map_blocks *map,
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struct ext4_ext_path *path,
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struct ext4_ext_path **ppath,
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int flags)
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{
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struct ext4_ext_path *path = *ppath;
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struct ext4_sb_info *sbi;
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struct ext4_extent_header *eh;
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struct ext4_map_blocks split_map;
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@ -3599,7 +3601,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
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}
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}
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allocated = ext4_split_extent(handle, inode, path,
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allocated = ext4_split_extent(handle, inode, ppath,
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&split_map, split_flag, flags);
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if (allocated < 0)
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err = allocated;
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@ -3638,9 +3640,10 @@ out:
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static int ext4_split_convert_extents(handle_t *handle,
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struct inode *inode,
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struct ext4_map_blocks *map,
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struct ext4_ext_path *path,
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struct ext4_ext_path **ppath,
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int flags)
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{
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struct ext4_ext_path *path = *ppath;
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ext4_lblk_t eof_block;
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ext4_lblk_t ee_block;
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struct ext4_extent *ex;
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@ -3674,14 +3677,15 @@ static int ext4_split_convert_extents(handle_t *handle,
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split_flag |= (EXT4_EXT_MARK_UNWRIT2 | EXT4_EXT_DATA_VALID2);
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}
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flags |= EXT4_GET_BLOCKS_PRE_IO;
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return ext4_split_extent(handle, inode, path, map, split_flag, flags);
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return ext4_split_extent(handle, inode, ppath, map, split_flag, flags);
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}
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static int ext4_convert_unwritten_extents_endio(handle_t *handle,
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struct inode *inode,
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struct ext4_map_blocks *map,
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struct ext4_ext_path *path)
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struct ext4_ext_path **ppath)
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{
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struct ext4_ext_path *path = *ppath;
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struct ext4_extent *ex;
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ext4_lblk_t ee_block;
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unsigned int ee_len;
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@ -3710,17 +3714,14 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle,
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inode->i_ino, (unsigned long long)ee_block, ee_len,
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(unsigned long long)map->m_lblk, map->m_len);
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#endif
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err = ext4_split_convert_extents(handle, inode, map, path,
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err = ext4_split_convert_extents(handle, inode, map, ppath,
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EXT4_GET_BLOCKS_CONVERT);
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if (err < 0)
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goto out;
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return err;
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ext4_ext_drop_refs(path);
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path = ext4_ext_find_extent(inode, map->m_lblk, &path,
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EXT4_EX_NOFREE_ON_ERR);
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if (IS_ERR(path)) {
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err = PTR_ERR(path);
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goto out;
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}
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path = ext4_ext_find_extent(inode, map->m_lblk, ppath, 0);
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if (IS_ERR(path))
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return PTR_ERR(path);
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depth = ext_depth(inode);
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ex = path[depth].p_ext;
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}
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@ -3942,7 +3943,7 @@ convert_initialized_extent(handle_t *handle, struct inode *inode,
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(unsigned long long)ee_block, ee_len);
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if (ee_block != map->m_lblk || ee_len > map->m_len) {
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err = ext4_split_convert_extents(handle, inode, map, path,
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err = ext4_split_convert_extents(handle, inode, map, ppath,
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EXT4_GET_BLOCKS_CONVERT_UNWRITTEN);
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if (err < 0)
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return err;
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@ -3990,9 +3991,10 @@ convert_initialized_extent(handle_t *handle, struct inode *inode,
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static int
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ext4_ext_handle_unwritten_extents(handle_t *handle, struct inode *inode,
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struct ext4_map_blocks *map,
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struct ext4_ext_path *path, int flags,
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struct ext4_ext_path **ppath, int flags,
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unsigned int allocated, ext4_fsblk_t newblock)
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{
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struct ext4_ext_path *path = *ppath;
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int ret = 0;
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int err = 0;
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ext4_io_end_t *io = ext4_inode_aio(inode);
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@ -4014,8 +4016,8 @@ ext4_ext_handle_unwritten_extents(handle_t *handle, struct inode *inode,
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/* get_block() before submit the IO, split the extent */
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if (flags & EXT4_GET_BLOCKS_PRE_IO) {
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ret = ext4_split_convert_extents(handle, inode, map,
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path, flags | EXT4_GET_BLOCKS_CONVERT);
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ret = ext4_split_convert_extents(handle, inode, map, ppath,
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flags | EXT4_GET_BLOCKS_CONVERT);
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if (ret <= 0)
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goto out;
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/*
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@ -4033,7 +4035,7 @@ ext4_ext_handle_unwritten_extents(handle_t *handle, struct inode *inode,
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/* IO end_io complete, convert the filled extent to written */
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if (flags & EXT4_GET_BLOCKS_CONVERT) {
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ret = ext4_convert_unwritten_extents_endio(handle, inode, map,
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path);
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ppath);
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if (ret >= 0) {
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ext4_update_inode_fsync_trans(handle, inode, 1);
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err = check_eofblocks_fl(handle, inode, map->m_lblk,
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@ -4071,7 +4073,7 @@ ext4_ext_handle_unwritten_extents(handle_t *handle, struct inode *inode,
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}
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/* buffered write, writepage time, convert*/
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ret = ext4_ext_convert_to_initialized(handle, inode, map, path, flags);
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ret = ext4_ext_convert_to_initialized(handle, inode, map, ppath, flags);
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if (ret >= 0)
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ext4_update_inode_fsync_trans(handle, inode, 1);
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out:
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@ -4332,7 +4334,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
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goto out;
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ret = ext4_ext_handle_unwritten_extents(
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handle, inode, map, path, flags,
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handle, inode, map, &path, flags,
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allocated, newblock);
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if (ret < 0)
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err = ret;
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@ -4479,7 +4481,7 @@ got_allocated_blocks:
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err = check_eofblocks_fl(handle, inode, map->m_lblk,
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path, ar.len);
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if (!err)
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err = ext4_ext_insert_extent(handle, inode, path,
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err = ext4_ext_insert_extent(handle, inode, &path,
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&newex, flags);
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if (!err && set_unwritten) {
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@ -5611,18 +5613,18 @@ ext4_swap_extents(handle_t *handle, struct inode *inode1,
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if (e1_blk < lblk1) {
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split = 1;
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*erp = ext4_force_split_extent_at(handle, inode1,
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path1, lblk1, 0);
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&path1, lblk1, 0);
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if (unlikely(*erp))
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goto finish;
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}
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if (e2_blk < lblk2) {
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split = 1;
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*erp = ext4_force_split_extent_at(handle, inode2,
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path2, lblk2, 0);
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&path2, lblk2, 0);
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||||
if (unlikely(*erp))
|
||||
goto finish;
|
||||
}
|
||||
/* ext4_split_extent_at() may retult in leaf extent split,
|
||||
/* ext4_split_extent_at() may result in leaf extent split,
|
||||
* path must to be revalidated. */
|
||||
if (split)
|
||||
goto repeat;
|
||||
|
|
@ -5637,18 +5639,18 @@ ext4_swap_extents(handle_t *handle, struct inode *inode1,
|
|||
if (len != e1_len) {
|
||||
split = 1;
|
||||
*erp = ext4_force_split_extent_at(handle, inode1,
|
||||
path1, lblk1 + len, 0);
|
||||
&path1, lblk1 + len, 0);
|
||||
if (unlikely(*erp))
|
||||
goto finish;
|
||||
}
|
||||
if (len != e2_len) {
|
||||
split = 1;
|
||||
*erp = ext4_force_split_extent_at(handle, inode2,
|
||||
path2, lblk2 + len, 0);
|
||||
&path2, lblk2 + len, 0);
|
||||
if (*erp)
|
||||
goto finish;
|
||||
}
|
||||
/* ext4_split_extent_at() may retult in leaf extent split,
|
||||
/* ext4_split_extent_at() may result in leaf extent split,
|
||||
* path must to be revalidated. */
|
||||
if (split)
|
||||
goto repeat;
|
||||
|
|
|
|||
|
|
@ -81,7 +81,7 @@ static int finish_range(handle_t *handle, struct inode *inode,
|
|||
goto err_out;
|
||||
}
|
||||
}
|
||||
retval = ext4_ext_insert_extent(handle, inode, path, &newext, 0);
|
||||
retval = ext4_ext_insert_extent(handle, inode, &path, &newext, 0);
|
||||
err_out:
|
||||
up_write((&EXT4_I(inode)->i_data_sem));
|
||||
if (path) {
|
||||
|
|
|
|||
Loading…
Reference in New Issue