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-rw-r--r--fs/reiserfs/bitmap.c97
-rw-r--r--fs/reiserfs/resize.c24
-rw-r--r--fs/reiserfs/super.c39
-rw-r--r--include/linux/reiserfs_fs_sb.h1
4 files changed, 70 insertions, 91 deletions
diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c
index abdd6d9..cca1dbf 100644
--- a/fs/reiserfs/bitmap.c
+++ b/fs/reiserfs/bitmap.c
@@ -60,7 +60,6 @@ static inline void get_bit_address(struct super_block *s,
int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value)
{
int bmap, offset;
- struct buffer_head *bh;
if (block == 0 || block >= SB_BLOCK_COUNT(s)) {
reiserfs_warning(s,
@@ -98,22 +97,6 @@ int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value)
return 0;
}
- bh = SB_AP_BITMAP(s)[bmap].bh;
- get_bh(bh);
-
- if ((bit_value == 0 && reiserfs_test_le_bit(offset, bh->b_data)) ||
- (bit_value == 1 && reiserfs_test_le_bit(offset, bh->b_data) == 0)) {
- reiserfs_warning(s,
- "vs-4040: is_reusable: corresponding bit of block %lu does not "
- "match required value (bmap==%d, offset==%d) test_bit==%d",
- block, bmap, offset,
- reiserfs_test_le_bit(offset, bh->b_data));
-
- brelse(bh);
- return 0;
- }
- brelse(bh);
-
if (bit_value == 0 && block == SB_ROOT_BLOCK(s)) {
reiserfs_warning(s,
"vs-4050: is_reusable: this is root block (%u), "
@@ -173,13 +156,10 @@ static int scan_bitmap_block(struct reiserfs_transaction_handle *th,
bmap_n);
return 0;
}
- bh = bi->bh;
- get_bh(bh);
- if (buffer_locked(bh)) {
- PROC_INFO_INC(s, scan_bitmap.wait);
- __wait_on_buffer(bh);
- }
+ bh = reiserfs_read_bitmap_block(s, bmap_n);
+ if (bh == NULL)
+ return 0;
while (1) {
cont:
@@ -285,9 +265,20 @@ static int bmap_hash_id(struct super_block *s, u32 id)
*/
static inline int block_group_used(struct super_block *s, u32 id)
{
- int bm;
- bm = bmap_hash_id(s, id);
- if (SB_AP_BITMAP(s)[bm].free_count > ((s->s_blocksize << 3) * 60 / 100)) {
+ int bm = bmap_hash_id(s, id);
+ struct reiserfs_bitmap_info *info = &SB_AP_BITMAP(s)[bm];
+
+ /* If we don't have cached information on this bitmap block, we're
+ * going to have to load it later anyway. Loading it here allows us
+ * to make a better decision. This favors long-term performace gain
+ * with a better on-disk layout vs. a short term gain of skipping the
+ * read and potentially having a bad placement. */
+ if (info->first_zero_hint == 0) {
+ struct buffer_head *bh = reiserfs_read_bitmap_block(s, bm);
+ brelse(bh);
+ }
+
+ if (info->free_count > ((s->s_blocksize << 3) * 60 / 100)) {
return 0;
}
return 1;
@@ -413,8 +404,9 @@ static void _reiserfs_free_block(struct reiserfs_transaction_handle *th,
return;
}
- bmbh = apbi[nr].bh;
- get_bh(bmbh);
+ bmbh = reiserfs_read_bitmap_block(s, nr);
+ if (!bmbh)
+ return;
reiserfs_prepare_for_journal(s, bmbh, 1);
@@ -1320,6 +1312,7 @@ struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb,
unsigned int bitmap)
{
b_blocknr_t block = (sb->s_blocksize << 3) * bitmap;
+ struct reiserfs_bitmap_info *info = SB_AP_BITMAP(sb) + bitmap;
struct buffer_head *bh;
/* Way old format filesystems had the bitmaps packed up front.
@@ -1330,9 +1323,21 @@ struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb,
else if (bitmap == 0)
block = (REISERFS_DISK_OFFSET_IN_BYTES >> sb->s_blocksize_bits) + 1;
- bh = sb_getblk(sb, block);
- if (!buffer_uptodate(bh))
- ll_rw_block(READ, 1, &bh);
+ bh = sb_bread(sb, block);
+ if (bh == NULL)
+ reiserfs_warning(sb, "sh-2029: %s: bitmap block (#%lu) "
+ "reading failed", __FUNCTION__, bh->b_blocknr);
+ else {
+ if (buffer_locked(bh)) {
+ PROC_INFO_INC(sb, scan_bitmap.wait);
+ __wait_on_buffer(bh);
+ }
+ BUG_ON(!buffer_uptodate(bh));
+ BUG_ON(atomic_read(&bh->b_count) == 0);
+
+ if (info->first_zero_hint == 0)
+ reiserfs_cache_bitmap_metadata(sb, bh, info);
+ }
return bh;
}
@@ -1340,7 +1345,6 @@ struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb,
int reiserfs_init_bitmap_cache(struct super_block *sb)
{
struct reiserfs_bitmap_info *bitmap;
- int i;
bitmap = vmalloc(sizeof (*bitmap) * SB_BMAP_NR(sb));
if (bitmap == NULL)
@@ -1348,28 +1352,15 @@ int reiserfs_init_bitmap_cache(struct super_block *sb)
memset(bitmap, 0, sizeof (*bitmap) * SB_BMAP_NR(sb));
- for (i = 0; i < SB_BMAP_NR(sb); i++)
- bitmap[i].bh = reiserfs_read_bitmap_block(sb, i);
-
- /* make sure we have them all */
- for (i = 0; i < SB_BMAP_NR(sb); i++) {
- wait_on_buffer(bitmap[i].bh);
- if (!buffer_uptodate(bitmap[i].bh)) {
- reiserfs_warning(sb, "sh-2029: %s: "
- "bitmap block (#%lu) reading failed",
- __FUNCTION__, bitmap[i].bh->b_blocknr);
- for (i = 0; i < SB_BMAP_NR(sb); i++)
- brelse(bitmap[i].bh);
- vfree(bitmap);
- return -EIO;
- }
- }
-
- /* Cache the info on the bitmaps before we get rolling */
- for (i = 0; i < SB_BMAP_NR(sb); i++)
- reiserfs_cache_bitmap_metadata(sb, bitmap[i].bh, &bitmap[i]);
-
SB_AP_BITMAP(sb) = bitmap;
return 0;
}
+
+void reiserfs_free_bitmap_cache(struct super_block *sb)
+{
+ if (SB_AP_BITMAP(sb)) {
+ vfree(SB_AP_BITMAP(sb));
+ SB_AP_BITMAP(sb) = NULL;
+ }
+}
diff --git a/fs/reiserfs/resize.c b/fs/reiserfs/resize.c
index 90d39fd..3156847 100644
--- a/fs/reiserfs/resize.c
+++ b/fs/reiserfs/resize.c
@@ -128,8 +128,9 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
* transaction begins, and the new bitmaps don't matter if the
* transaction fails. */
for (i = bmap_nr; i < bmap_nr_new; i++) {
- bh = sb_getblk(s, i * s->s_blocksize * 8);
- get_bh(bh);
+ /* don't use read_bitmap_block since it will cache
+ * the uninitialized bitmap */
+ bh = sb_bread(s, i * s->s_blocksize * 8);
memset(bh->b_data, 0, sb_blocksize(sb));
reiserfs_test_and_set_le_bit(0, bh->b_data);
reiserfs_cache_bitmap_metadata(s, bh, bitmap + i);
@@ -140,7 +141,6 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
// update bitmap_info stuff
bitmap[i].first_zero_hint = 1;
bitmap[i].free_count = sb_blocksize(sb) * 8 - 1;
- bitmap[i].bh = bh;
brelse(bh);
}
/* free old bitmap blocks array */
@@ -157,8 +157,13 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
/* Extend old last bitmap block - new blocks have been made available */
info = SB_AP_BITMAP(s) + bmap_nr - 1;
- bh = info->bh;
- get_bh(bh);
+ bh = reiserfs_read_bitmap_block(s, bmap_nr - 1);
+ if (!bh) {
+ int jerr = journal_end(&th, s, 10);
+ if (jerr)
+ return jerr;
+ return -EIO;
+ }
reiserfs_prepare_for_journal(s, bh, 1);
for (i = block_r; i < s->s_blocksize * 8; i++)
@@ -172,8 +177,13 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
/* Correct new last bitmap block - It may not be full */
info = SB_AP_BITMAP(s) + bmap_nr_new - 1;
- bh = info->bh;
- get_bh(bh);
+ bh = reiserfs_read_bitmap_block(s, bmap_nr_new - 1);
+ if (!bh) {
+ int jerr = journal_end(&th, s, 10);
+ if (jerr)
+ return jerr;
+ return -EIO;
+ }
reiserfs_prepare_for_journal(s, bh, 1);
for (i = block_r_new; i < s->s_blocksize * 8; i++)
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index c78e99e..c89aa23 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -432,7 +432,6 @@ int remove_save_link(struct inode *inode, int truncate)
static void reiserfs_put_super(struct super_block *s)
{
- int i;
struct reiserfs_transaction_handle th;
th.t_trans_id = 0;
@@ -462,10 +461,7 @@ static void reiserfs_put_super(struct super_block *s)
*/
journal_release(&th, s);
- for (i = 0; i < SB_BMAP_NR(s); i++)
- brelse(SB_AP_BITMAP(s)[i].bh);
-
- vfree(SB_AP_BITMAP(s));
+ reiserfs_free_bitmap_cache(s);
brelse(SB_BUFFER_WITH_SB(s));
@@ -1344,7 +1340,6 @@ static int read_super_block(struct super_block *s, int offset)
/* after journal replay, reread all bitmap and super blocks */
static int reread_meta_blocks(struct super_block *s)
{
- int i;
ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
wait_on_buffer(SB_BUFFER_WITH_SB(s));
if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
@@ -1353,20 +1348,7 @@ static int reread_meta_blocks(struct super_block *s)
return 1;
}
- for (i = 0; i < SB_BMAP_NR(s); i++) {
- ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh));
- wait_on_buffer(SB_AP_BITMAP(s)[i].bh);
- if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
- reiserfs_warning(s,
- "reread_meta_blocks, error reading bitmap block number %d at %llu",
- i,
- (unsigned long long)SB_AP_BITMAP(s)[i].
- bh->b_blocknr);
- return 1;
- }
- }
return 0;
-
}
/////////////////////////////////////////////////////
@@ -1547,7 +1529,6 @@ static int function2code(hashf_t func)
static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
{
struct inode *root_inode;
- int j;
struct reiserfs_transaction_handle th;
int old_format = 0;
unsigned long blocks;
@@ -1793,19 +1774,17 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
if (jinit_done) { /* kill the commit thread, free journal ram */
journal_release_error(NULL, s);
}
- if (SB_DISK_SUPER_BLOCK(s)) {
- for (j = 0; j < SB_BMAP_NR(s); j++) {
- if (SB_AP_BITMAP(s))
- brelse(SB_AP_BITMAP(s)[j].bh);
- }
- vfree(SB_AP_BITMAP(s));
- }
+
+ reiserfs_free_bitmap_cache(s);
if (SB_BUFFER_WITH_SB(s))
brelse(SB_BUFFER_WITH_SB(s));
#ifdef CONFIG_QUOTA
- for (j = 0; j < MAXQUOTAS; j++) {
- kfree(sbi->s_qf_names[j]);
- sbi->s_qf_names[j] = NULL;
+ {
+ int j;
+ for (j = 0; j < MAXQUOTAS; j++) {
+ kfree(sbi->s_qf_names[j]);
+ sbi->s_qf_names[j] = NULL;
+ }
}
#endif
kfree(sbi);
diff --git a/include/linux/reiserfs_fs_sb.h b/include/linux/reiserfs_fs_sb.h
index 4f21ad3..73e0bec 100644
--- a/include/linux/reiserfs_fs_sb.h
+++ b/include/linux/reiserfs_fs_sb.h
@@ -267,7 +267,6 @@ struct reiserfs_bitmap_info {
// FIXME: Won't work with block sizes > 8K
__u16 first_zero_hint;
__u16 free_count;
- struct buffer_head *bh; /* the actual bitmap */
};
struct proc_dir_entry;
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