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| author | Mingming Cao <cmm@us.ibm.com> | 2008-07-11 19:27:31 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-07-11 19:27:31 -0400 |
| commit | 07031431072ece801d53d2c03d5e5bb21f4f64a4 (patch) | |
| tree | b3075b21242bda4e16c35814fceeaef64a027647 /fs/ext4/mballoc.c | |
| parent | d755fb384250d6bd7fd18a0930e71965acc8e72e (diff) | |
| download | lwn-07031431072ece801d53d2c03d5e5bb21f4f64a4.tar.gz lwn-07031431072ece801d53d2c03d5e5bb21f4f64a4.zip | |
ext4: mballoc avoid use root reserved blocks for non root allocation
mballoc allocation missed check for blocks reserved for root users. Add
ext4_has_free_blocks() check before allocation. Also modified
ext4_has_free_blocks() to support multiple block allocation request.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/mballoc.c')
| -rw-r--r-- | fs/ext4/mballoc.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 816ba8cce79a..1666ac184e31 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4045,6 +4045,12 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle, &(ar->len), errp); return block; } + ar->len = ext4_has_free_blocks(sbi, ar->len); + + if (ar->len == 0) { + *errp = -ENOSPC; + return 0; + } while (ar->len && DQUOT_ALLOC_BLOCK(ar->inode, ar->len)) { ar->flags |= EXT4_MB_HINT_NOPREALLOC; @@ -4073,7 +4079,6 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle, ac->ac_op = EXT4_MB_HISTORY_PREALLOC; if (!ext4_mb_use_preallocated(ac)) { - ac->ac_op = EXT4_MB_HISTORY_ALLOC; ext4_mb_normalize_request(ac, ar); repeat: |