linux-ext4 - [PATCH] e2fsck: allow the block bitmap to be uninit when the inode bitmap is in use

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Message-Id: <1328558115-19526-1-git-send-email-tytso@mit.edu>
Date:	Mon,  6 Feb 2012 14:55:15 -0500
From:	Theodore Ts'o <tytso@....edu>
To:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc:	Theodore Ts'o <tytso@....edu>
Subject: [PATCH] e2fsck: allow the block bitmap to be uninit when the inode bitmap is in use

Removing this check will allow us to eventually eliminate code from
the kernel which forcibly initialized the block bitmap when the inode
bitmap is first used.  This would eliminate a required journal credit
and extra disk write.

Addresses-Google-Bug: #5944440

Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
 e2fsck/problem.c |    5 -----
 e2fsck/problem.h |    4 ++--
 e2fsck/super.c   |    9 ---------
 3 files changed, 2 insertions(+), 16 deletions(-)

diff --git a/e2fsck/problem.c b/e2fsck/problem.c
index f042b89..579c838 100644
--- a/e2fsck/problem.c
+++ b/e2fsck/problem.c
@@ -362,11 +362,6 @@ static struct e2fsck_problem problem_table[] = {
 	  N_("@g descriptor %g marked uninitialized without feature set.\n"),
 	     PROMPT_FIX, PR_PREEN_OK },
 
-	/* group N block bitmap uninitialized but inode bitmap in use. */
-	{ PR_0_BB_UNINIT_IB_INIT,
-	  N_("@g %g @b @B uninitialized but @i @B in use.\n"),
-	     PROMPT_FIX, PR_PREEN_OK },
-
 	/* Group descriptor N has invalid unused inodes count. */
 	{ PR_0_GDT_ITABLE_UNUSED,
 	  N_("@g descriptor %g has invalid unused inodes count %b.  "),
diff --git a/e2fsck/problem.h b/e2fsck/problem.h
index 9db29d8..3fabc90 100644
--- a/e2fsck/problem.h
+++ b/e2fsck/problem.h
@@ -203,8 +203,8 @@ struct problem_context {
 /* Group descriptor N marked uninitialized without feature set. */
 #define PR_0_GDT_UNINIT				0x000036
 
-/* Block bitmap is not initialised and Inode bitmap is */
-#define PR_0_BB_UNINIT_IB_INIT			0x000037
+/* Block bitmap is not initialised and Inode bitmap is -- NO LONGER USED */
+/* #define PR_0_BB_UNINIT_IB_INIT			0x000037 */
 
 /* Group descriptor N has invalid unused inodes count. */
 #define PR_0_GDT_ITABLE_UNUSED			0x000038
diff --git a/e2fsck/super.c b/e2fsck/super.c
index afec4b4..3397d77 100644
--- a/e2fsck/super.c
+++ b/e2fsck/super.c
@@ -666,15 +666,6 @@ void check_super_block(e2fsck_t ctx)
 			ext2fs_unmark_valid(fs);
 		}
 
-		if (ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) &&
-		    !ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT)) {
-			if (fix_problem(ctx, PR_0_BB_UNINIT_IB_INIT, &pctx)) {
-				ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
-				should_be = 1;
-			}
-			ext2fs_unmark_valid(fs);
-		}
-
 		if (csum_flag &&
 		    (ext2fs_bg_itable_unused(fs, i) > ext2fs_bg_free_inodes_count(fs, i) ||
 		     ext2fs_bg_itable_unused(fs, i) > sb->s_inodes_per_group)) {
-- 
1.7.9.107.g8e04a

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