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Message-Id: <1300570117-24048-4-git-send-email-tytso@mit.edu>
Date: Sat, 19 Mar 2011 17:28:28 -0400
From: Theodore Ts'o <tytso@....edu>
To: linux-ext4@...r.kernel.org
Cc: Theodore Ts'o <tytso@....edu>
Subject: [PATCH, RFC 03/12] ext4: Convert instances of EXT4_BLOCKS_PER_GROUP to EXT4_CLUSTERS_PER_GROUP
Change the places in fs/ext4/mballoc.c where EXT4_BLOCKS_PER_GROUP are
used to indicate the number of bits in a block bitmap (which is really
a cluster allocation bitmap in bigalloc file systems). There are
still some places in the ext4 codebase where usage of
EXT4_BLOCKS_PER_GROUP needs to be audited/fixed, in code paths that
aren't used given the initial restricted assumptions for bigalloc.
These will need to be fixed before we can relax those restrictions.
Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
fs/ext4/mballoc.c | 34 +++++++++++++++++-----------------
1 files changed, 17 insertions(+), 17 deletions(-)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 2f6f0dd..02f099f 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -651,7 +651,7 @@ static void ext4_mb_mark_free_simple(struct super_block *sb,
ext4_grpblk_t chunk;
unsigned short border;
- BUG_ON(len > EXT4_BLOCKS_PER_GROUP(sb));
+ BUG_ON(len > EXT4_CLUSTERS_PER_GROUP(sb));
border = 2 << sb->s_blocksize_bits;
@@ -703,7 +703,7 @@ void ext4_mb_generate_buddy(struct super_block *sb,
void *buddy, void *bitmap, ext4_group_t group)
{
struct ext4_group_info *grp = ext4_get_group_info(sb, group);
- ext4_grpblk_t max = EXT4_BLOCKS_PER_GROUP(sb);
+ ext4_grpblk_t max = EXT4_CLUSTERS_PER_GROUP(sb);
ext4_grpblk_t i = 0;
ext4_grpblk_t first;
ext4_grpblk_t len;
@@ -1680,8 +1680,8 @@ static void ext4_mb_measure_extent(struct ext4_allocation_context *ac,
struct ext4_free_extent *gex = &ac->ac_g_ex;
BUG_ON(ex->fe_len <= 0);
- BUG_ON(ex->fe_len > EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
- BUG_ON(ex->fe_start >= EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
+ BUG_ON(ex->fe_len > EXT4_CLUSTERS_PER_GROUP(ac->ac_sb));
+ BUG_ON(ex->fe_start >= EXT4_CLUSTERS_PER_GROUP(ac->ac_sb));
BUG_ON(ac->ac_status != AC_STATUS_CONTINUE);
ac->ac_found++;
@@ -1879,8 +1879,8 @@ void ext4_mb_complex_scan_group(struct ext4_allocation_context *ac,
while (free && ac->ac_status == AC_STATUS_CONTINUE) {
i = mb_find_next_zero_bit(bitmap,
- EXT4_BLOCKS_PER_GROUP(sb), i);
- if (i >= EXT4_BLOCKS_PER_GROUP(sb)) {
+ EXT4_CLUSTERS_PER_GROUP(sb), i);
+ if (i >= EXT4_CLUSTERS_PER_GROUP(sb)) {
/*
* IF we have corrupt bitmap, we won't find any
* free blocks even though group info says we
@@ -1943,7 +1943,7 @@ void ext4_mb_scan_aligned(struct ext4_allocation_context *ac,
do_div(a, sbi->s_stripe);
i = (a * sbi->s_stripe) - first_group_block;
- while (i < EXT4_BLOCKS_PER_GROUP(sb)) {
+ while (i < EXT4_CLUSTERS_PER_GROUP(sb)) {
if (!mb_test_bit(i, bitmap)) {
max = mb_find_extent(e4b, 0, i, sbi->s_stripe, &ex);
if (max >= sbi->s_stripe) {
@@ -3071,7 +3071,7 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
}
BUG_ON(start + size <= ac->ac_o_ex.fe_logical &&
start > ac->ac_o_ex.fe_logical);
- BUG_ON(size <= 0 || size > EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
+ BUG_ON(size <= 0 || size > EXT4_CLUSTERS_PER_GROUP(ac->ac_sb));
/* now prepare goal request */
@@ -3724,7 +3724,7 @@ ext4_mb_discard_group_preallocations(struct super_block *sb,
}
if (needed == 0)
- needed = EXT4_BLOCKS_PER_GROUP(sb) + 1;
+ needed = EXT4_CLUSTERS_PER_GROUP(sb) + 1;
INIT_LIST_HEAD(&list);
repeat:
@@ -4039,8 +4039,8 @@ ext4_mb_initialize_context(struct ext4_allocation_context *ac,
len = ar->len;
/* just a dirty hack to filter too big requests */
- if (len >= EXT4_BLOCKS_PER_GROUP(sb) - 10)
- len = EXT4_BLOCKS_PER_GROUP(sb) - 10;
+ if (len >= EXT4_CLUSTERS_PER_GROUP(sb) - 10)
+ len = EXT4_CLUSTERS_PER_GROUP(sb) - 10;
/* start searching from the goal */
goal = ar->goal;
@@ -4579,8 +4579,8 @@ do_more:
* Check to see if we are freeing blocks across a group
* boundary.
*/
- if (bit + count > EXT4_BLOCKS_PER_GROUP(sb)) {
- overflow = bit + count - EXT4_BLOCKS_PER_GROUP(sb);
+ if (bit + count > EXT4_CLUSTERS_PER_GROUP(sb)) {
+ overflow = bit + count - EXT4_CLUSTERS_PER_GROUP(sb);
count -= overflow;
}
bitmap_bh = ext4_read_block_bitmap(sb, block_group);
@@ -4844,7 +4844,7 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
minlen = range->minlen >> sb->s_blocksize_bits;
trimmed = 0;
- if (unlikely(minlen > EXT4_BLOCKS_PER_GROUP(sb)))
+ if (unlikely(minlen > EXT4_CLUSTERS_PER_GROUP(sb)))
return -EINVAL;
if (start < first_data_blk) {
len -= first_data_blk - start;
@@ -4857,7 +4857,7 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
ext4_get_group_no_and_offset(sb, (ext4_fsblk_t) (start + len),
&last_group, &last_block);
last_group = (last_group > ngroups - 1) ? ngroups - 1 : last_group;
- last_block = EXT4_BLOCKS_PER_GROUP(sb);
+ last_block = EXT4_CLUSTERS_PER_GROUP(sb);
if (first_group > last_group)
return -EINVAL;
@@ -4870,8 +4870,8 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
break;
}
- if (len >= EXT4_BLOCKS_PER_GROUP(sb))
- len -= (EXT4_BLOCKS_PER_GROUP(sb) - first_block);
+ if (len >= EXT4_CLUSTERS_PER_GROUP(sb))
+ len -= (EXT4_CLUSTERS_PER_GROUP(sb) - first_block);
else
last_block = first_block + len;
--
1.7.3.1
--
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