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Diffstat (limited to 'fs/ext4/mballoc.c')
-rw-r--r--fs/ext4/mballoc.c47
1 files changed, 36 insertions, 11 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 1d7fde994521..873ad9b3418c 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2736,7 +2736,7 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
struct ext4_sb_info *sbi;
struct super_block *sb;
ext4_fsblk_t block;
- int err;
+ int err, len;
BUG_ON(ac->ac_status != AC_STATUS_FOUND);
BUG_ON(ac->ac_b_ex.fe_len <= 0);
@@ -2770,14 +2770,27 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
+ ac->ac_b_ex.fe_start
+ le32_to_cpu(es->s_first_data_block);
- if (block == ext4_block_bitmap(sb, gdp) ||
- block == ext4_inode_bitmap(sb, gdp) ||
- in_range(block, ext4_inode_table(sb, gdp),
- EXT4_SB(sb)->s_itb_per_group)) {
-
+ len = ac->ac_b_ex.fe_len;
+ if (in_range(ext4_block_bitmap(sb, gdp), block, len) ||
+ in_range(ext4_inode_bitmap(sb, gdp), block, len) ||
+ in_range(block, ext4_inode_table(sb, gdp),
+ EXT4_SB(sb)->s_itb_per_group) ||
+ in_range(block + len - 1, ext4_inode_table(sb, gdp),
+ EXT4_SB(sb)->s_itb_per_group)) {
ext4_error(sb, __func__,
"Allocating block in system zone - block = %llu",
block);
+ /* File system mounted not to panic on error
+ * Fix the bitmap and repeat the block allocation
+ * We leak some of the blocks here.
+ */
+ mb_set_bits(sb_bgl_lock(sbi, ac->ac_b_ex.fe_group),
+ bitmap_bh->b_data, ac->ac_b_ex.fe_start,
+ ac->ac_b_ex.fe_len);
+ err = ext4_journal_dirty_metadata(handle, bitmap_bh);
+ if (!err)
+ err = -EAGAIN;
+ goto out_err;
}
#ifdef AGGRESSIVE_CHECK
{
@@ -4032,7 +4045,6 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
ac->ac_op = EXT4_MB_HISTORY_ALLOC;
ext4_mb_normalize_request(ac, ar);
-
repeat:
/* allocate space in core */
ext4_mb_regular_allocator(ac);
@@ -4046,10 +4058,21 @@ repeat:
}
if (likely(ac->ac_status == AC_STATUS_FOUND)) {
- ext4_mb_mark_diskspace_used(ac, handle);
- *errp = 0;
- block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);
- ar->len = ac->ac_b_ex.fe_len;
+ *errp = ext4_mb_mark_diskspace_used(ac, handle);
+ if (*errp == -EAGAIN) {
+ ac->ac_b_ex.fe_group = 0;
+ ac->ac_b_ex.fe_start = 0;
+ ac->ac_b_ex.fe_len = 0;
+ ac->ac_status = AC_STATUS_CONTINUE;
+ goto repeat;
+ } else if (*errp) {
+ ac->ac_b_ex.fe_len = 0;
+ ar->len = 0;
+ ext4_mb_show_ac(ac);
+ } else {
+ block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);
+ ar->len = ac->ac_b_ex.fe_len;
+ }
} else {
freed = ext4_mb_discard_preallocations(sb, ac->ac_o_ex.fe_len);
if (freed)
@@ -4236,6 +4259,8 @@ do_more:
ext4_error(sb, __func__,
"Freeing blocks in system zone - "
"Block = %lu, count = %lu", block, count);
+ /* err = 0. ext4_std_error should be a no op */
+ goto error_return;
}
BUFFER_TRACE(bitmap_bh, "getting write access");