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ext4: mballoc avoid use root reserved blocks for non root allocation

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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>
This commit is contained in:
Mingming Cao
2008-07-11 19:27:31 -04:00
committed by Theodore Ts'o
parent d755fb3842
commit 0703143107
3 changed files with 41 additions and 19 deletions
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7
fs/ext4/mballoc.c
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@@ -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: