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Date: Sat, 25 Oct 2014 13:58:19 -0700
From: "Darrick J. Wong" <darrick.wong@...cle.com>
To: tytso@....edu, darrick.wong@...cle.com
Cc: linux-ext4@...r.kernel.org
Subject: [PATCH 18/39] e2fsck: opportunistically recalculate unused inode
count and inode_uninit after pass 5
At the end of pass5, update the unused inode count to cover any newly
unused inodes and set inode_uninit if none of the inodes in the group
are used. This will save us time on future fsck runs since we don't
need to scan those inodes any more.
Since it's not an error for the unused inode count to be smaller than
necessary, don't bother if the fs is mounted and we're not fixing
anything else.
On an aged filesystem that has experienced at least one massive inode
die-off, this has been shown to reduce future e2fsck times by around
10%. The effect is diluted on less heavily used filesystems.
Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
e2fsck/pass5.c | 38 +++++++++++++++++++++++++++++++
e2fsck/problem.c | 5 ++++
e2fsck/problem.h | 3 ++
tests/f_bad_bbitmap/expect.1 | 3 ++
tests/f_bad_bmap_csum/expect.1 | 3 ++
tests/f_bad_gdt_csum/expect.1 | 7 +++++-
tests/f_bad_ibitmap/expect.1 | 3 ++
tests/f_bad_inode_csum/expect.1 | 3 ++
tests/f_idata_and_extents/expect.1 | 3 ++
tests/f_illitable_flexbg/expect.1 | 12 ++++++++++
tests/f_inlinedata_repair/expect.1 | 3 ++
tests/f_invalid_extent_symlink/expect.1 | 3 ++
tests/f_jnl_64bit/expect.1 | 6 +++++
tests/f_super_bad_csum/expect.1 | 8 +++++--
tests/f_unused_itable/expect.1 | 6 +++++
15 files changed, 103 insertions(+), 3 deletions(-)
diff --git a/e2fsck/pass5.c b/e2fsck/pass5.c
index 64fb7fe..1a225fb 100644
--- a/e2fsck/pass5.c
+++ b/e2fsck/pass5.c
@@ -821,6 +821,44 @@ do_counts:
} else
ext2fs_unmark_valid(fs);
}
+
+ /*
+ * Opportunistically update the unused inodes count
+ * and set inode_uninit so we can skip scanning unused
+ * inodes during future fsck runs. However, it's not
+ * an error if the unused inode count is smaller
+ * than necessary, so don't bother the user if FS is
+ * mounted and we haven't fixed anything else, to
+ * minimize unnecessary reboots.
+ */
+ if (((ctx->options & E2F_OPT_NO) ||
+ !(ctx->mount_flags & EXT2_MF_MOUNTED) ||
+ ext2fs_test_changed(fs)) &&
+ ext2fs_has_group_desc_csum(fs) &&
+ !ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT)) {
+ ext2_ino_t start, end, j;
+
+ start = (fs->super->s_inodes_per_group * i) + 1;
+ end = (fs->super->s_inodes_per_group * (i + 1));
+ pctx.group = i;
+ pctx.ino = ext2fs_bg_itable_unused(fs, i);
+ end -= pctx.ino;
+ for (j = end; j >= start; j--)
+ if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, j))
+ break;
+
+ pctx.ino2 = fs->super->s_inodes_per_group -
+ (j - start + 1);
+ if (pctx.ino != pctx.ino2 &&
+ fix_problem(ctx, PR_5_UNUSED_INODES_COUNT_GROUP,
+ &pctx)) {
+ if (pctx.ino2 == fs->super->s_inodes_per_group)
+ ext2fs_bg_flags_set(fs, i,
+ EXT2_BG_INODE_UNINIT);
+ ext2fs_bg_itable_unused_set(fs, i, pctx.ino2);
+ ext2fs_mark_super_dirty(fs);
+ }
+ }
}
if (free_inodes != fs->super->s_free_inodes_count) {
pctx.group = -1;
diff --git a/e2fsck/problem.c b/e2fsck/problem.c
index a4da64b..9c2b2e6 100644
--- a/e2fsck/problem.c
+++ b/e2fsck/problem.c
@@ -1899,6 +1899,11 @@ static struct e2fsck_problem problem_table[] = {
N_("@g %g @b @B does not match checksum.\n"),
PROMPT_FIX, PR_LATCH_BBITMAP | PR_PREEN_OK },
+ /* Unused inode count for group wrong */
+ { PR_5_UNUSED_INODES_COUNT_GROUP,
+ N_("Unused @i count wrong for @g #%g (%i, counted=%j).\n"),
+ PROMPT_FIX, PR_PREEN_OK | PR_NO_OK },
+
/* Post-Pass 5 errors */
/* Recreate journal if E2F_FLAG_JOURNAL_INODE flag is set */
diff --git a/e2fsck/problem.h b/e2fsck/problem.h
index 3c28166..6a71fc8 100644
--- a/e2fsck/problem.h
+++ b/e2fsck/problem.h
@@ -1139,6 +1139,9 @@ struct problem_context {
/* Block bitmap checksum does not match */
#define PR_5_BLOCK_BITMAP_CSUM_INVALID 0x05001B
+/* Unused inode count for group wrong */
+#define PR_5_UNUSED_INODES_COUNT_GROUP 0x05001C
+
/*
* Post-Pass 5 errors
*/
diff --git a/tests/f_bad_bbitmap/expect.1 b/tests/f_bad_bbitmap/expect.1
index 71ad1bb..af3f632 100644
--- a/tests/f_bad_bbitmap/expect.1
+++ b/tests/f_bad_bbitmap/expect.1
@@ -9,6 +9,9 @@ Pass 5: Checking group summary information
Block bitmap differences: -(8--10) -(12--17) -(19--31)
Fix? yes
+Unused inode count wrong for group #0 (0, counted=117).
+Fix? yes
+
test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
test_filesys: 11/128 files (0.0% non-contiguous), 18/512 blocks
diff --git a/tests/f_bad_bmap_csum/expect.1 b/tests/f_bad_bmap_csum/expect.1
index ca8f77f..7616751 100644
--- a/tests/f_bad_bmap_csum/expect.1
+++ b/tests/f_bad_bmap_csum/expect.1
@@ -6,6 +6,9 @@ Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
+Unused inode count wrong for group #0 (0, counted=117).
+Fix? yes
+
Inode bitmap differences: Group 0 inode bitmap does not match checksum.
FIXED.
Block bitmap differences: Group 0 block bitmap does not match checksum.
diff --git a/tests/f_bad_gdt_csum/expect.1 b/tests/f_bad_gdt_csum/expect.1
index e14c897..0f496e0 100644
--- a/tests/f_bad_gdt_csum/expect.1
+++ b/tests/f_bad_gdt_csum/expect.1
@@ -6,5 +6,10 @@ Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
+Unused inode count wrong for group #0 (0, counted=117).
+Fix? yes
+
+
+test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
test_filesys: 11/128 files (0.0% non-contiguous), 18/512 blocks
-Exit status is 0
+Exit status is 1
diff --git a/tests/f_bad_ibitmap/expect.1 b/tests/f_bad_ibitmap/expect.1
index ea17523..81689e0 100644
--- a/tests/f_bad_ibitmap/expect.1
+++ b/tests/f_bad_ibitmap/expect.1
@@ -9,6 +9,9 @@ Pass 5: Checking group summary information
Inode bitmap differences: -(12--32)
Fix? yes
+Unused inode count wrong for group #0 (0, counted=117).
+Fix? yes
+
test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
test_filesys: 11/128 files (0.0% non-contiguous), 18/512 blocks
diff --git a/tests/f_bad_inode_csum/expect.1 b/tests/f_bad_inode_csum/expect.1
index b3c628d..b28a349 100644
--- a/tests/f_bad_inode_csum/expect.1
+++ b/tests/f_bad_inode_csum/expect.1
@@ -117,6 +117,9 @@ Fix? yes
Free inodes count wrong for group #0 (0, counted=32).
Fix? yes
+Unused inode count wrong for group #0 (0, counted=32).
+Fix? yes
+
Free inodes count wrong (0, counted=32).
Fix? yes
diff --git a/tests/f_idata_and_extents/expect.1 b/tests/f_idata_and_extents/expect.1
index 7f7fbf3..aba063a 100644
--- a/tests/f_idata_and_extents/expect.1
+++ b/tests/f_idata_and_extents/expect.1
@@ -26,6 +26,9 @@ Fix? yes
Free inodes count wrong for group #0 (105, counted=106).
Fix? yes
+Unused inode count wrong for group #0 (103, counted=105).
+Fix? yes
+
Free inodes count wrong (105, counted=106).
Fix? yes
diff --git a/tests/f_illitable_flexbg/expect.1 b/tests/f_illitable_flexbg/expect.1
index fa42a0f..04ce65b 100644
--- a/tests/f_illitable_flexbg/expect.1
+++ b/tests/f_illitable_flexbg/expect.1
@@ -18,6 +18,18 @@ Pass 5: Checking group summary information
Inode bitmap differences: -(65--128)
Fix? yes
+Unused inode count wrong for group #0 (0, counted=52).
+Fix? yes
+
+Unused inode count wrong for group #1 (0, counted=64).
+Fix? yes
+
+Unused inode count wrong for group #2 (0, counted=64).
+Fix? yes
+
+Unused inode count wrong for group #3 (0, counted=64).
+Fix? yes
+
test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
test_filesys: 12/256 files (0.0% non-contiguous), 31163/32768 blocks
diff --git a/tests/f_inlinedata_repair/expect.1 b/tests/f_inlinedata_repair/expect.1
index faba192..f7eebd3 100644
--- a/tests/f_inlinedata_repair/expect.1
+++ b/tests/f_inlinedata_repair/expect.1
@@ -69,6 +69,9 @@ Pass 5: Checking group summary information
Directories count wrong for group #0 (7, counted=8).
Fix? yes
+Unused inode count wrong for group #0 (90, counted=91).
+Fix? yes
+
test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
test_filesys: 28/128 files (0.0% non-contiguous), 18/512 blocks
diff --git a/tests/f_invalid_extent_symlink/expect.1 b/tests/f_invalid_extent_symlink/expect.1
index 7bda0b7..cbb2ac5 100644
--- a/tests/f_invalid_extent_symlink/expect.1
+++ b/tests/f_invalid_extent_symlink/expect.1
@@ -6,6 +6,9 @@ Clear? yes
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
+Unused inode count wrong for group #0 (4, counted=5).
+Fix? yes
+
test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
test_filesys: 11/16 files (9.1% non-contiguous), 21/100 blocks
diff --git a/tests/f_jnl_64bit/expect.1 b/tests/f_jnl_64bit/expect.1
index e360e2f..915076b 100644
--- a/tests/f_jnl_64bit/expect.1
+++ b/tests/f_jnl_64bit/expect.1
@@ -7,6 +7,12 @@ Pass 5: Checking group summary information
Free blocks count wrong (14059, counted=12712).
Fix? yes
+Unused inode count wrong for group #0 (0, counted=2876).
+Fix? yes
+
+Unused inode count wrong for group #1 (1395, counted=3958).
+Fix? yes
+
Free inodes count wrong (8181, counted=6834).
Fix? yes
diff --git a/tests/f_super_bad_csum/expect.1 b/tests/f_super_bad_csum/expect.1
index 25ced5c..a606fab 100644
--- a/tests/f_super_bad_csum/expect.1
+++ b/tests/f_super_bad_csum/expect.1
@@ -5,8 +5,12 @@ Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
-Inode bitmap differences: Group 1 inode bitmap does not match checksum.
-FIXED.
+Unused inode count wrong for group #0 (0, counted=501).
+Fix? yes
+
+Unused inode count wrong for group #1 (0, counted=512).
+Fix? yes
+
test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
test_filesys: 11/1024 files (0.0% non-contiguous), 1557/16384 blocks
diff --git a/tests/f_unused_itable/expect.1 b/tests/f_unused_itable/expect.1
index a4da987..fbc6538 100644
--- a/tests/f_unused_itable/expect.1
+++ b/tests/f_unused_itable/expect.1
@@ -19,9 +19,15 @@ Pass 5: Checking group summary information
Free inodes count wrong for group #0 (53, counted=51).
Fix? yes
+Unused inode count wrong for group #0 (0, counted=51).
+Fix? yes
+
Free inodes count wrong for group #1 (64, counted=58).
Fix? yes
+Unused inode count wrong for group #1 (0, counted=58).
+Fix? yes
+
test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
test_filesys: 19/128 files (0.0% non-contiguous), 165/1000 blocks
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