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authorAllison Henderson <achender@linux.vnet.ibm.com>2011-05-25 07:41:46 -0400
committerTheodore Ts'o <tytso@mit.edu>2011-05-25 07:41:46 -0400
commite861304b8ed83fe43e36d46794d72641c82d4636 (patch)
tree14a9c42ee5b6a531bc3202063bcd9c413e30c17e /Kbuild
parentd583fb87a3ff0ca50befd2f73f7a67fade1c8c56 (diff)
ext4: add "punch hole" flag to ext4_map_blocks()
This patch adds a new flag to ext4_map_blocks() that specifies the given range of blocks should be punched out. Extents are first converted to uninitialized extents before they are punched out. Because punching a hole may require that the extent be split, it is possible that the splitting may need more blocks than are available. To deal with this, use of reserved blocks are enabled to allow the split to proceed. The routine then returns the number of blocks successfully punched out. [ext4 punch hole patch series 4/5 v7] Signed-off-by: Allison Henderson <achender@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Mingming Cao <cmm@us.ibm.com>
Diffstat (limited to 'Kbuild')
0 files changed, 0 insertions, 0 deletions