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ext4: fix the comment of ext4_map_blocks()/ext4_ext_map_blocks() 

this comment of ext4_map_blocks()/ext4_ext_map_blocks() need
update after commit c21770573319("ext4: Define a new set of
flags for ext4_get_blocks()").

Signed-off-by: Cheng Nie <niecheng1@uniontech.com>
Link: https://lore.kernel.org/r/20240118062511.28276-1-niecheng1@uniontech.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Cheng Nie 2024-01-18 14:25:11 +08:00 committed by Theodore Ts'o
parent 4b55d3431c
commit 547e64bda9
2 changed files with 8 additions and 8 deletions
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6
fs/ext4/extents.c
View File

@ -4111,10 +4111,10 @@ insert_hole:
*
* Need to be called with
* down_read(&EXT4_I(inode)->i_data_sem) if not allocating file system block
* (ie, create is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem)
* (ie, flags is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem)
*
* return > 0, number of blocks already mapped/allocated
* if create == 0 and these are pre-allocated blocks
* if flags doesn't contain EXT4_GET_BLOCKS_CREATE and these are pre-allocated blocks
* buffer head is unmapped
* otherwise blocks are mapped
*
@ -4218,7 +4218,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
/*
* requested block isn't allocated yet;
* we couldn't try to create block if create flag is zero
* we couldn't try to create block if flags doesn't contain EXT4_GET_BLOCKS_CREATE
*/
if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) {
ext4_lblk_t len;

10
fs/ext4/inode.c
View File

@ -465,9 +465,10 @@ static void ext4_map_blocks_es_recheck(handle_t *handle,
* Otherwise, call with ext4_ind_map_blocks() to handle indirect mapping
* based files
*
* On success, it returns the number of blocks being mapped or allocated. if
* create==0 and the blocks are pre-allocated and unwritten, the resulting @map
* is marked as unwritten. If the create == 1, it will mark @map as mapped.
* On success, it returns the number of blocks being mapped or allocated.
* If flags doesn't contain EXT4_GET_BLOCKS_CREATE the blocks are
* pre-allocated and unwritten, the resulting @map is marked as unwritten.
* If the flags contain EXT4_GET_BLOCKS_CREATE, it will mark @map as mapped.
*
* It returns 0 if plain look up failed (blocks have not been allocated), in
* that case, @map is returned as unmapped but we still do fill map->m_len to
@ -589,8 +590,7 @@ found:
* Returns if the blocks have already allocated
*
* Note that if blocks have been preallocated
* ext4_ext_get_block() returns the create = 0
* with buffer head unmapped.
* ext4_ext_map_blocks() returns with buffer head unmapped
*/
if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED)
/*