ocfs2: Set ac_last_group properly with discontig group.
ac_last_group is used to record the last block group we
used during allocation. But the initialization process
only calls ocfs2_which_suballoc_group and fails to
use suballoc_loc properly. So let us do it.
Another function ocfs2_test_suballoc_bit also needs fix.
I have searched all the callers of ocfs2_which_suballoc_group,
and all the callers notices suballoc_loc now.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index 0c08353..a327c80 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -1982,10 +1982,10 @@
}
static void ocfs2_init_inode_ac_group(struct inode *dir,
- struct buffer_head *parent_fe_bh,
+ struct buffer_head *parent_di_bh,
struct ocfs2_alloc_context *ac)
{
- struct ocfs2_dinode *fe = (struct ocfs2_dinode *)parent_fe_bh->b_data;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)parent_di_bh->b_data;
/*
* Try to allocate inodes from some specific group.
*
@@ -1999,10 +1999,14 @@
if (OCFS2_I(dir)->ip_last_used_group &&
OCFS2_I(dir)->ip_last_used_slot == ac->ac_alloc_slot)
ac->ac_last_group = OCFS2_I(dir)->ip_last_used_group;
- else if (le16_to_cpu(fe->i_suballoc_slot) == ac->ac_alloc_slot)
- ac->ac_last_group = ocfs2_which_suballoc_group(
- le64_to_cpu(fe->i_blkno),
- le16_to_cpu(fe->i_suballoc_bit));
+ else if (le16_to_cpu(di->i_suballoc_slot) == ac->ac_alloc_slot) {
+ if (di->i_suballoc_loc)
+ ac->ac_last_group = le64_to_cpu(di->i_suballoc_loc);
+ else
+ ac->ac_last_group = ocfs2_which_suballoc_group(
+ le64_to_cpu(di->i_blkno),
+ le16_to_cpu(di->i_suballoc_bit));
+ }
}
static inline void ocfs2_save_inode_ac_group(struct inode *dir,
@@ -2620,7 +2624,7 @@
struct buffer_head *alloc_bh, u64 blkno,
u16 bit, int *res)
{
- struct ocfs2_dinode *alloc_fe;
+ struct ocfs2_dinode *alloc_di;
struct ocfs2_group_desc *group;
struct buffer_head *group_bh = NULL;
u64 bg_blkno;
@@ -2629,17 +2633,20 @@
mlog_entry("blkno: %llu bit: %u\n", (unsigned long long)blkno,
(unsigned int)bit);
- alloc_fe = (struct ocfs2_dinode *)alloc_bh->b_data;
- if ((bit + 1) > ocfs2_bits_per_group(&alloc_fe->id2.i_chain)) {
+ alloc_di = (struct ocfs2_dinode *)alloc_bh->b_data;
+ if ((bit + 1) > ocfs2_bits_per_group(&alloc_di->id2.i_chain)) {
mlog(ML_ERROR, "suballoc bit %u out of range of %u\n",
(unsigned int)bit,
- ocfs2_bits_per_group(&alloc_fe->id2.i_chain));
+ ocfs2_bits_per_group(&alloc_di->id2.i_chain));
status = -EINVAL;
goto bail;
}
- bg_blkno = ocfs2_which_suballoc_group(blkno, bit);
- status = ocfs2_read_group_descriptor(suballoc, alloc_fe, bg_blkno,
+ if (alloc_di->i_suballoc_loc)
+ bg_blkno = le64_to_cpu(alloc_di->i_suballoc_loc);
+ else
+ bg_blkno = ocfs2_which_suballoc_group(blkno, bit);
+ status = ocfs2_read_group_descriptor(suballoc, alloc_di, bg_blkno,
&group_bh);
if (status < 0) {
mlog(ML_ERROR, "read group %llu failed %d\n",