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authorAllison Henderson <achender@linux.vnet.ibm.com>2011-05-25 07:41:26 -0400
committerTheodore Ts'o <tytso@mit.edu>2011-05-25 07:41:26 -0400
commit55f020db66ce187fb8c8e4002a94b0eb714da450 (patch)
treee98214511542f57fa93074be12e27c4819520333 /fs/ext4/mballoc.c
parentae81230686282af745ebb7a74c0332349cb9131a (diff)
ext4: add flag to ext4_has_free_blocks
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: 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 'fs/ext4/mballoc.c')
-rw-r--r--fs/ext4/mballoc.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 396b01f5c4fb..859f2ae8864e 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4236,7 +4236,9 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
* there is enough free blocks to do block allocation
* and verify allocation doesn't exceed the quota limits.
*/
- while (ar->len && ext4_claim_free_blocks(sbi, ar->len)) {
+ while (ar->len &&
+ ext4_claim_free_blocks(sbi, ar->len, ar->flags)) {
+
/* let others to free the space */
yield();
ar->len = ar->len >> 1;
@@ -4246,9 +4248,15 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
return 0;
}
reserv_blks = ar->len;
- while (ar->len && dquot_alloc_block(ar->inode, ar->len)) {
- ar->flags |= EXT4_MB_HINT_NOPREALLOC;
- ar->len--;
+ if (ar->flags & EXT4_MB_USE_ROOT_BLOCKS) {
+ dquot_alloc_block_nofail(ar->inode, ar->len);
+ } else {
+ while (ar->len &&
+ dquot_alloc_block(ar->inode, ar->len)) {
+
+ ar->flags |= EXT4_MB_HINT_NOPREALLOC;
+ ar->len--;
+ }
}
inquota = ar->len;
if (ar->len == 0) {