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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/ext4.h
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/ext4.h')
-rw-r--r--fs/ext4/ext4.h13
1 files changed, 10 insertions, 3 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 2bc4c21f1d2..2f310d1839e 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -108,7 +108,8 @@ typedef unsigned int ext4_group_t;
#define EXT4_MB_DELALLOC_RESERVED 0x0400
/* We are doing stream allocation */
#define EXT4_MB_STREAM_ALLOC 0x0800
-
+/* Use reserved root blocks if needed */
+#define EXT4_MB_USE_ROOT_BLOCKS 0x1000
struct ext4_allocation_request {
/* target inode for block we're allocating */
@@ -514,6 +515,8 @@ struct ext4_new_group_data {
/* Convert extent to initialized after IO complete */
#define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
+ /* Punch out blocks of an extent */
+#define EXT4_GET_BLOCKS_PUNCH_OUT_EXT 0x0020
/*
* Flags used by ext4_free_blocks
@@ -1718,8 +1721,12 @@ extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
ext4_group_t group);
extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
- ext4_fsblk_t goal, unsigned long *count, int *errp);
-extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi, s64 nblocks);
+ ext4_fsblk_t goal,
+ unsigned int flags,
+ unsigned long *count,
+ int *errp);
+extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi,
+ s64 nblocks, unsigned int flags);
extern ext4_fsblk_t ext4_count_free_blocks(struct super_block *);
extern void ext4_check_blocks_bitmap(struct super_block *);
extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,