• Allison Henderson's avatar
    ext4: add flag to ext4_has_free_blocks · 55f020db
    Allison Henderson authored
    This patch adds an allocation request flag to the ext4_has_free_blocks
    function which enables the use of reserved blocks.  This will allow a
    punch hole to proceed even if the disk is full.  Punching a hole may
    require additional blocks to first split the extents.
    
    Because ext4_has_free_blocks is a low level function, the flag needs
    to be passed down through several functions listed below:
    
    ext4_ext_insert_extent
    ext4_ext_create_new_leaf
    ext4_ext_grow_indepth
    ext4_ext_split
    ext4_ext_new_meta_block
    ext4_mb_new_blocks
    ext4_claim_free_blocks
    ext4_has_free_blocks
    
    [ext4 punch hole patch series 1/5 v7]
    Signed-off-by: default avatarAllison Henderson <achender@us.ibm.com>
    Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
    Reviewed-by: default avatarMingming Cao <cmm@us.ibm.com>
    55f020db
balloc.c 17.4 KB