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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>
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@ -4111,10 +4111,10 @@ static ext4_lblk_t ext4_ext_determine_insert_hole(struct inode *inode,
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*
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* Need to be called with
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* down_read(&EXT4_I(inode)->i_data_sem) if not allocating file system block
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* (ie, create is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem)
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* (ie, flags is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem)
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*
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* return > 0, number of blocks already mapped/allocated
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* if create == 0 and these are pre-allocated blocks
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* if flags doesn't contain EXT4_GET_BLOCKS_CREATE and these are pre-allocated blocks
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* buffer head is unmapped
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* otherwise blocks are mapped
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*
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@ -4218,7 +4218,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
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/*
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* requested block isn't allocated yet;
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* we couldn't try to create block if create flag is zero
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* we couldn't try to create block if flags doesn't contain EXT4_GET_BLOCKS_CREATE
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*/
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if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) {
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ext4_lblk_t len;
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@ -465,9 +465,10 @@ static void ext4_map_blocks_es_recheck(handle_t *handle,
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* Otherwise, call with ext4_ind_map_blocks() to handle indirect mapping
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* based files
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*
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* On success, it returns the number of blocks being mapped or allocated. if
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* create==0 and the blocks are pre-allocated and unwritten, the resulting @map
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* is marked as unwritten. If the create == 1, it will mark @map as mapped.
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* On success, it returns the number of blocks being mapped or allocated.
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* If flags doesn't contain EXT4_GET_BLOCKS_CREATE the blocks are
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* pre-allocated and unwritten, the resulting @map is marked as unwritten.
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* If the flags contain EXT4_GET_BLOCKS_CREATE, it will mark @map as mapped.
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*
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* It returns 0 if plain look up failed (blocks have not been allocated), in
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* that case, @map is returned as unmapped but we still do fill map->m_len to
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@ -589,8 +590,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
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* Returns if the blocks have already allocated
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*
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* Note that if blocks have been preallocated
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* ext4_ext_get_block() returns the create = 0
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* with buffer head unmapped.
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* ext4_ext_map_blocks() returns with buffer head unmapped
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*/
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if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED)
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/*
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