X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=fs%2Freiserfs%2Fresize.c;h=f71c3948edef8324ac68a71042fbc35209cb5ea3;hb=2848077044a5fdeb942bd1342c550da4c452d66a;hp=39cc7f47f5dc57686469302c9ba75e3289d1360f;hpb=ef88b7dba2b47c70037a34a599d383462bb74bd3;p=linux-2.6-omap-h63xx.git

diff --git a/fs/reiserfs/resize.c b/fs/reiserfs/resize.c
index 39cc7f47f5d..f71c3948ede 100644
--- a/fs/reiserfs/resize.c
+++ b/fs/reiserfs/resize.c
@@ -22,6 +22,7 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
 	int err = 0;
 	struct reiserfs_super_block *sb;
 	struct reiserfs_bitmap_info *bitmap;
+	struct reiserfs_bitmap_info *info;
 	struct reiserfs_bitmap_info *old_bitmap = SB_AP_BITMAP(s);
 	struct buffer_head *bh;
 	struct reiserfs_transaction_handle th;
@@ -60,7 +61,8 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
 	}
 
 	/* count used bits in last bitmap block */
-	block_r = SB_BLOCK_COUNT(s) - (SB_BMAP_NR(s) - 1) * s->s_blocksize * 8;
+	block_r = SB_BLOCK_COUNT(s) -
+			(reiserfs_bmap_count(s) - 1) * s->s_blocksize * 8;
 
 	/* count bitmap blocks in new fs */
 	bmap_nr_new = block_count_new / (s->s_blocksize * 8);
@@ -72,7 +74,7 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
 
 	/* save old values */
 	block_count = SB_BLOCK_COUNT(s);
-	bmap_nr = SB_BMAP_NR(s);
+	bmap_nr = reiserfs_bmap_count(s);
 
 	/* resizing of reiserfs bitmaps (journal and real), if needed */
 	if (bmap_nr_new > bmap_nr) {
@@ -118,7 +120,7 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
 			return -ENOMEM;
 		}
 		memset(bitmap, 0,
-		       sizeof(struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
+		       sizeof(struct reiserfs_bitmap_info) * bmap_nr_new);
 		for (i = 0; i < bmap_nr; i++)
 			bitmap[i] = old_bitmap[i];
 
@@ -127,16 +129,23 @@ 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++) {
-			bitmap[i].bh = sb_getblk(s, i * s->s_blocksize * 8);
-			memset(bitmap[i].bh->b_data, 0, sb_blocksize(sb));
-			reiserfs_test_and_set_le_bit(0, bitmap[i].bh->b_data);
-
-			set_buffer_uptodate(bitmap[i].bh);
-			mark_buffer_dirty(bitmap[i].bh);
-			sync_dirty_buffer(bitmap[i].bh);
+			/* don't use read_bitmap_block since it will cache
+			 * the uninitialized bitmap */
+			bh = sb_bread(s, i * s->s_blocksize * 8);
+			if (!bh) {
+				vfree(bitmap);
+				return -EIO;
+			}
+			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);
+
+			set_buffer_uptodate(bh);
+			mark_buffer_dirty(bh);
+			sync_dirty_buffer(bh);
 			// update bitmap_info stuff
-			bitmap[i].first_zero_hint = 1;
 			bitmap[i].free_count = sb_blocksize(sb) * 8 - 1;
+			brelse(bh);
 		}
 		/* free old bitmap blocks array */
 		SB_AP_BITMAP(s) = bitmap;
@@ -150,30 +159,41 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
 	if (err)
 		return err;
 
-	/* correct last bitmap blocks in old and new disk layout */
-	reiserfs_prepare_for_journal(s, SB_AP_BITMAP(s)[bmap_nr - 1].bh, 1);
+	/* Extend old last bitmap block - new blocks have been made available */
+	info = SB_AP_BITMAP(s) + bmap_nr - 1;
+	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++)
-		reiserfs_test_and_clear_le_bit(i,
-					       SB_AP_BITMAP(s)[bmap_nr -
-							       1].bh->b_data);
-	SB_AP_BITMAP(s)[bmap_nr - 1].free_count += s->s_blocksize * 8 - block_r;
-	if (!SB_AP_BITMAP(s)[bmap_nr - 1].first_zero_hint)
-		SB_AP_BITMAP(s)[bmap_nr - 1].first_zero_hint = block_r;
+		reiserfs_test_and_clear_le_bit(i, bh->b_data);
+	info->free_count += s->s_blocksize * 8 - block_r;
 
-	journal_mark_dirty(&th, s, SB_AP_BITMAP(s)[bmap_nr - 1].bh);
+	journal_mark_dirty(&th, s, bh);
+	brelse(bh);
 
-	reiserfs_prepare_for_journal(s, SB_AP_BITMAP(s)[bmap_nr_new - 1].bh, 1);
+	/* Correct new last bitmap block - It may not be full */
+	info = SB_AP_BITMAP(s) + bmap_nr_new - 1;
+	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++)
-		reiserfs_test_and_set_le_bit(i,
-					     SB_AP_BITMAP(s)[bmap_nr_new -
-							     1].bh->b_data);
-	journal_mark_dirty(&th, s, SB_AP_BITMAP(s)[bmap_nr_new - 1].bh);
-
-	SB_AP_BITMAP(s)[bmap_nr_new - 1].free_count -=
-	    s->s_blocksize * 8 - block_r_new;
-	/* Extreme case where last bitmap is the only valid block in itself. */
-	if (!SB_AP_BITMAP(s)[bmap_nr_new - 1].free_count)
-		SB_AP_BITMAP(s)[bmap_nr_new - 1].first_zero_hint = 0;
+		reiserfs_test_and_set_le_bit(i, bh->b_data);
+	journal_mark_dirty(&th, s, bh);
+	brelse(bh);
+
+	info->free_count -= s->s_blocksize * 8 - block_r_new;
 	/* update super */
 	reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
 	free_blocks = SB_FREE_BLOCKS(s);
@@ -181,7 +201,7 @@ int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
 			   free_blocks + (block_count_new - block_count -
 					  (bmap_nr_new - bmap_nr)));
 	PUT_SB_BLOCK_COUNT(s, block_count_new);
-	PUT_SB_BMAP_NR(s, bmap_nr_new);
+	PUT_SB_BMAP_NR(s, bmap_would_wrap(bmap_nr_new) ? : bmap_nr_new);
 	s->s_dirt = 1;
 
 	journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));