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ext4: factor out a common helper to query extent map

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Factor out a new common helper ext4_map_query_blocks() from the
ext4_da_map_blocks(), it query and return the extent map status on the
inode's extent path, no logic changes.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://patch.msgid.link/20240517124005.347221-2-yi.zhang@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Zhang Yi 2024-05-17 20:39:56 +08:00 committed by Theodore Ts'o
parent 907c3fe532
commit 8e4e5cdf2f
1 changed files with 32 additions and 25 deletions
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57
fs/ext4/inode.c
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@ -453,6 +453,35 @@ static void ext4_map_blocks_es_recheck(handle_t *handle,
}
#endif /* ES_AGGRESSIVE_TEST */
static int ext4_map_query_blocks(handle_t *handle, struct inode *inode,
struct ext4_map_blocks *map)
{
unsigned int status;
int retval;
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
retval = ext4_ext_map_blocks(handle, inode, map, 0);
else
retval = ext4_ind_map_blocks(handle, inode, map, 0);
if (retval <= 0)
return retval;
if (unlikely(retval != map->m_len)) {
ext4_warning(inode->i_sb,
"ES len assertion failed for inode "
"%lu: retval %d != map->m_len %d",
inode->i_ino, retval, map->m_len);
WARN_ON(1);
}
status = map->m_flags & EXT4_MAP_UNWRITTEN ?
EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;
ext4_es_insert_extent(inode, map->m_lblk, map->m_len,
map->m_pblk, status);
return retval;
}
/*
* The ext4_map_blocks() function tries to look up the requested blocks,
* and returns if the blocks are already mapped.
@ -1744,33 +1773,11 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock,
down_read(&EXT4_I(inode)->i_data_sem);
if (ext4_has_inline_data(inode))
retval = 0;
else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
retval = ext4_ext_map_blocks(NULL, inode, map, 0);
else
retval = ext4_ind_map_blocks(NULL, inode, map, 0);
if (retval < 0) {
up_read(&EXT4_I(inode)->i_data_sem);
return retval;
}
if (retval > 0) {
unsigned int status;
if (unlikely(retval != map->m_len)) {
ext4_warning(inode->i_sb,
"ES len assertion failed for inode "
"%lu: retval %d != map->m_len %d",
inode->i_ino, retval, map->m_len);
WARN_ON(1);
}
status = map->m_flags & EXT4_MAP_UNWRITTEN ?
EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;
ext4_es_insert_extent(inode, map->m_lblk, map->m_len,
map->m_pblk, status);
up_read(&EXT4_I(inode)->i_data_sem);
return retval;
}
retval = ext4_map_query_blocks(NULL, inode, map);
up_read(&EXT4_I(inode)->i_data_sem);
if (retval)
return retval;
add_delayed:
down_write(&EXT4_I(inode)->i_data_sem);