[PATCH e2fsprogs v3 0/4] quota-related e2fsck fixes and tests

[PATCH e2fsprogs v3 0/4] quota-related e2fsck fixes and tests

[Luis Henriques (SUSE)]

Hi!

Changes since v2:

Added deallocate_inode() documentation, as suggested by Andreas Dilger
(and using text he provided).

And, for reference, here's the cover-letter from v2:

I'm (re)sending two fixes to e2fsck that are related with quota handling.
The fixes are the first two patches, the other two are test cases for these
fixes.

As I mentioned in v1, the issues were found using fstests ext4/014 and
ext4/019.  And the only thing in this series that changed from v1 was the
first test ("tests: new test to check quota after directory optimization"),
which is now using a much simplified version of the testcase.

Note that, since the first two patches didn't change, they have already a

Reviewed-by: Andreas Dilger <adilger@dilger.ca>

which I'm not including in the patches themselves.  Should I?  Or is that
better left for the maintainer (eventually) applying them?

Cheers,
-- 
Luis


Luis Henriques (SUSE) (4):
  e2fsck: update quota accounting after directory optimization
  e2fsck: update quota when deallocating a bad inode
  tests: new test to check quota after directory optimization
  tests: new test to check quota after a bad inode deallocation

 e2fsck/pass2.c                          |  43 ++++++++++++++++++------
 e2fsck/rehash.c                         |  27 +++++++++++----
 tests/f_quota_deallocate_inode/expect.1 |  18 ++++++++++
 tests/f_quota_deallocate_inode/expect.2 |   7 ++++
 tests/f_quota_deallocate_inode/image.gz | Bin 0 -> 11594 bytes
 tests/f_quota_deallocate_inode/name     |   1 +
 tests/f_quota_shrinkdir/expect.1        |  18 ++++++++++
 tests/f_quota_shrinkdir/expect.2        |   7 ++++
 tests/f_quota_shrinkdir/image.gz        | Bin 0 -> 10761 bytes
 tests/f_quota_shrinkdir/name            |   1 +
 10 files changed, 105 insertions(+), 17 deletions(-)
 create mode 100644 tests/f_quota_deallocate_inode/expect.1
 create mode 100644 tests/f_quota_deallocate_inode/expect.2
 create mode 100644 tests/f_quota_deallocate_inode/image.gz
 create mode 100644 tests/f_quota_deallocate_inode/name
 create mode 100644 tests/f_quota_shrinkdir/expect.1
 create mode 100644 tests/f_quota_shrinkdir/expect.2
 create mode 100644 tests/f_quota_shrinkdir/image.gz
 create mode 100644 tests/f_quota_shrinkdir/name

[PATCH v3 1/4] e2fsck: update quota accounting after directory optimization

[Luis Henriques (SUSE)]

In "Pass 3A: Optimizing directories", a directory may have it's size reduced.
If that happens and quota is enabled in the filesystem, the quota information
will be incorrect because it doesn't take the rehash into account.  This issue
was detected by running fstest ext4/014.

This patch simply updates the quota data accordingly, after the directory is
written and it's size has been updated.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=218626
Signed-off-by: Luis Henriques (SUSE) <luis.henriques@linux.dev>
---
 e2fsck/rehash.c | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/e2fsck/rehash.c b/e2fsck/rehash.c
index c1da7d52724e..4847d172e5fe 100644
--- a/e2fsck/rehash.c
+++ b/e2fsck/rehash.c
@@ -987,14 +987,18 @@ errcode_t e2fsck_rehash_dir(e2fsck_t ctx, ext2_ino_t ino,
 {
 	ext2_filsys 		fs = ctx->fs;
 	errcode_t		retval;
-	struct ext2_inode 	inode;
+	struct ext2_inode_large	inode;
 	char			*dir_buf = 0;
 	struct fill_dir_struct	fd = { NULL, NULL, 0, 0, 0, NULL,
 				       0, 0, 0, 0, 0, 0 };
 	struct out_dir		outdir = { 0, 0, 0, 0 };
-	struct name_cmp_ctx name_cmp_ctx = {0, NULL};
+	struct name_cmp_ctx	name_cmp_ctx = {0, NULL};
+	__u64			osize;
 
-	e2fsck_read_inode(ctx, ino, &inode, "rehash_dir");
+	e2fsck_read_inode_full(ctx, ino, EXT2_INODE(&inode),
+			       sizeof(inode), "rehash_dir");
+
+	osize = EXT2_I_SIZE(&inode);
 
 	if (ext2fs_has_feature_inline_data(fs->super) &&
 	   (inode.i_flags & EXT4_INLINE_DATA_FL))
@@ -1013,7 +1017,7 @@ errcode_t e2fsck_rehash_dir(e2fsck_t ctx, ext2_ino_t ino,
 	fd.ino = ino;
 	fd.ctx = ctx;
 	fd.buf = dir_buf;
-	fd.inode = &inode;
+	fd.inode = EXT2_INODE(&inode);
 	fd.dir = ino;
 	if (!ext2fs_has_feature_dir_index(fs->super) ||
 	    (inode.i_size / fs->blocksize) < 2)
@@ -1092,14 +1096,25 @@ resort:
 			goto errout;
 	}
 
-	retval = write_directory(ctx, fs, &outdir, ino, &inode, fd.compress);
+	retval = write_directory(ctx, fs, &outdir, ino, EXT2_INODE(&inode),
+				 fd.compress);
 	if (retval)
 		goto errout;
 
+	if ((osize > EXT2_I_SIZE(&inode)) &&
+	    (ino != quota_type2inum(PRJQUOTA, fs->super)) &&
+	    (ino != fs->super->s_orphan_file_inum) &&
+	    (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
+	    !(inode.i_flags & EXT4_EA_INODE_FL)) {
+		quota_data_sub(ctx->qctx, &inode,
+			       ino, osize - EXT2_I_SIZE(&inode));
+	}
+
 	if (ctx->options & E2F_OPT_CONVERT_BMAP)
 		retval = e2fsck_rebuild_extents_later(ctx, ino);
 	else
-		retval = e2fsck_check_rebuild_extents(ctx, ino, &inode, pctx);
+		retval = e2fsck_check_rebuild_extents(ctx, ino,
+						      EXT2_INODE(&inode), pctx);
 errout:
 	ext2fs_free_mem(&dir_buf);
 	ext2fs_free_mem(&fd.harray);

[PATCH v3 2/4] e2fsck: update quota when deallocating a bad inode

[Luis Henriques (SUSE)]

If a bad inode is found it will be deallocated.  However, if the filesystem has
quota enabled, the quota information isn't being updated accordingly.  This
issue was detected by running fstest ext4/019.

This patch fixes the issue by decreasing the inode count from the
quota and, if blocks are also being released, also subtract them as well.

While there, and as suggested by Andreas Dilger, the deallocate_inode()
function documentation is also updated by this patch to make it clear what
that function really does.

Signed-off-by: Luis Henriques (SUSE) <luis.henriques@linux.dev>
---
 e2fsck/pass2.c | 43 ++++++++++++++++++++++++++++++++-----------
 1 file changed, 32 insertions(+), 11 deletions(-)

diff --git a/e2fsck/pass2.c b/e2fsck/pass2.c
index b91628567a7f..08ab40fa8ba1 100644
--- a/e2fsck/pass2.c
+++ b/e2fsck/pass2.c
@@ -1854,17 +1854,26 @@ static int deallocate_inode_block(ext2_filsys fs,
 }
 
 /*
- * This function deallocates an inode
+ * This function reverts various counters and bitmaps incremented in
+ * pass1 for the inode, blocks, and quotas before it was decided the
+ * inode was corrupt and needed to be cleared.  This avoids the need
+ * to run e2fsck a second time (or have it restart itself) to repair
+ * these counters.
+ *
+ * It does not modify any on-disk state, so even if the inode is bad
+ * it _should_ reset in-memory state to before the inode was first
+ * processed.
  */
 static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
 {
 	ext2_filsys fs = ctx->fs;
-	struct ext2_inode	inode;
+	struct ext2_inode_large	inode;
 	struct problem_context	pctx;
 	__u32			count;
 	struct del_block	del_block;
 
-	e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
+	e2fsck_read_inode_full(ctx, ino, EXT2_INODE(&inode),
+			       sizeof(inode), "deallocate_inode");
 	clear_problem_context(&pctx);
 	pctx.ino = ino;
 
@@ -1874,29 +1883,29 @@ static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
 	e2fsck_read_bitmaps(ctx);
 	ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(inode.i_mode));
 
-	if (ext2fs_file_acl_block(fs, &inode) &&
+	if (ext2fs_file_acl_block(fs, EXT2_INODE(&inode)) &&
 	    ext2fs_has_feature_xattr(fs->super)) {
 		pctx.errcode = ext2fs_adjust_ea_refcount3(fs,
-				ext2fs_file_acl_block(fs, &inode),
+				ext2fs_file_acl_block(fs, EXT2_INODE(&inode)),
 				block_buf, -1, &count, ino);
 		if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) {
 			pctx.errcode = 0;
 			count = 1;
 		}
 		if (pctx.errcode) {
-			pctx.blk = ext2fs_file_acl_block(fs, &inode);
+			pctx.blk = ext2fs_file_acl_block(fs, EXT2_INODE(&inode));
 			fix_problem(ctx, PR_2_ADJ_EA_REFCOUNT, &pctx);
 			ctx->flags |= E2F_FLAG_ABORT;
 			return;
 		}
 		if (count == 0) {
 			ext2fs_block_alloc_stats2(fs,
-				  ext2fs_file_acl_block(fs, &inode), -1);
+				  ext2fs_file_acl_block(fs, EXT2_INODE(&inode)), -1);
 		}
-		ext2fs_file_acl_block_set(fs, &inode, 0);
+		ext2fs_file_acl_block_set(fs, EXT2_INODE(&inode), 0);
 	}
 
-	if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
+	if (!ext2fs_inode_has_valid_blocks2(fs, EXT2_INODE(&inode)))
 		goto clear_inode;
 
 	/* Inline data inodes don't have blocks to iterate */
@@ -1921,10 +1930,22 @@ static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
 		ctx->flags |= E2F_FLAG_ABORT;
 		return;
 	}
+
+	if ((ino != quota_type2inum(PRJQUOTA, fs->super)) &&
+	    (ino != fs->super->s_orphan_file_inum) &&
+	    (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
+	    !(inode.i_flags & EXT4_EA_INODE_FL)) {
+		if (del_block.num > 0)
+			quota_data_sub(ctx->qctx, &inode, ino,
+				       del_block.num * EXT2_CLUSTER_SIZE(fs->super));
+		quota_data_inodes(ctx->qctx, (struct ext2_inode_large *)&inode,
+				  ino, -1);
+	}
+
 clear_inode:
 	/* Inode may have changed by block_iterate, so reread it */
-	e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
-	e2fsck_clear_inode(ctx, ino, &inode, 0, "deallocate_inode");
+	e2fsck_read_inode(ctx, ino, EXT2_INODE(&inode), "deallocate_inode");
+	e2fsck_clear_inode(ctx, ino, EXT2_INODE(&inode), 0, "deallocate_inode");
 }
 
 /*

[PATCH v3 3/4] tests: new test to check quota after directory optimization

[Luis Henriques (SUSE)]

This new test validates e2fsck by verifying that quota data is updated after a
directory optimization is performed.  This issue was initially found by fstest
ext4/014, and this test was based on it.  It includes a filesystem image where
the lost+found directory is unlinked after a new link to it is created:

  # debugfs -w -R "ln lost+found foo" f_testnew/image
  # debugfs -w -R "unlink lost+found" f_testnew/image

Signed-off-by: Luis Henriques (SUSE) <luis.henriques@linux.dev>
---
 tests/f_quota_shrinkdir/expect.1 |  18 ++++++++++++++++++
 tests/f_quota_shrinkdir/expect.2 |   7 +++++++
 tests/f_quota_shrinkdir/image.gz | Bin 0 -> 10761 bytes
 tests/f_quota_shrinkdir/name     |   1 +
 4 files changed, 26 insertions(+)
 create mode 100644 tests/f_quota_shrinkdir/expect.1
 create mode 100644 tests/f_quota_shrinkdir/expect.2
 create mode 100644 tests/f_quota_shrinkdir/image.gz
 create mode 100644 tests/f_quota_shrinkdir/name

diff --git a/tests/f_quota_shrinkdir/expect.1 b/tests/f_quota_shrinkdir/expect.1
new file mode 100644
index 000000000000..e4fc48ea6f90
--- /dev/null
+++ b/tests/f_quota_shrinkdir/expect.1
@@ -0,0 +1,18 @@
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+/lost+found not found.  Create? yes
+
+Pass 3A: Optimizing directories
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+[QUOTA WARNING] Usage inconsistent for ID 0:actual (3072, 3) != expected (13312, 2)
+Update quota info for quota type 0? yes
+
+[QUOTA WARNING] Usage inconsistent for ID 0:actual (3072, 3) != expected (13312, 2)
+Update quota info for quota type 1? yes
+
+
+test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
+test_filesys: 12/256 files (16.7% non-contiguous), 1145/8192 blocks
+Exit status is 1
diff --git a/tests/f_quota_shrinkdir/expect.2 b/tests/f_quota_shrinkdir/expect.2
new file mode 100644
index 000000000000..fcb2cb81441e
--- /dev/null
+++ b/tests/f_quota_shrinkdir/expect.2
@@ -0,0 +1,7 @@
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+test_filesys: 12/256 files (16.7% non-contiguous), 1145/8192 blocks
+Exit status is 0
diff --git a/tests/f_quota_shrinkdir/image.gz b/tests/f_quota_shrinkdir/image.gz
new file mode 100644
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diff --git a/tests/f_quota_shrinkdir/name b/tests/f_quota_shrinkdir/name
new file mode 100644
index 000000000000..8772ae5c814b
--- /dev/null
+++ b/tests/f_quota_shrinkdir/name
@@ -0,0 +1 @@
+update quota on directory optimization

[PATCH v3 4/4] tests: new test to check quota after a bad inode deallocation

[Luis Henriques (SUSE)]

This new test validates e2fsck by verifying that quota is updated after a bad
inode is deallocated.  It mimics fstest ext4/019 by including a filesystem image
where a symbolic link was created to an existing file, using a long symlink
name.  This symbolic link was then wiped with:

  # debugfs -w -R 'zap -f /testlink 0' f_testnew/image

Signed-off-by: Luis Henriques (SUSE) <luis.henriques@linux.dev>
---
 tests/f_quota_deallocate_inode/expect.1 |  18 ++++++++++++++++++
 tests/f_quota_deallocate_inode/expect.2 |   7 +++++++
 tests/f_quota_deallocate_inode/image.gz | Bin 0 -> 11594 bytes
 tests/f_quota_deallocate_inode/name     |   1 +
 4 files changed, 26 insertions(+)
 create mode 100644 tests/f_quota_deallocate_inode/expect.1
 create mode 100644 tests/f_quota_deallocate_inode/expect.2
 create mode 100644 tests/f_quota_deallocate_inode/image.gz
 create mode 100644 tests/f_quota_deallocate_inode/name

diff --git a/tests/f_quota_deallocate_inode/expect.1 b/tests/f_quota_deallocate_inode/expect.1
new file mode 100644
index 000000000000..2b2f128dbb57
--- /dev/null
+++ b/tests/f_quota_deallocate_inode/expect.1
@@ -0,0 +1,18 @@
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Symlink /testlink (inode #14) is invalid.
+Clear? yes
+
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+[QUOTA WARNING] Usage inconsistent for ID 0:actual (15360, 4) != expected (16384, 5)
+Update quota info for quota type 0? yes
+
+[QUOTA WARNING] Usage inconsistent for ID 0:actual (15360, 4) != expected (16384, 5)
+Update quota info for quota type 1? yes
+
+
+test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
+test_filesys: 13/256 files (15.4% non-contiguous), 1157/8192 blocks
+Exit status is 1
diff --git a/tests/f_quota_deallocate_inode/expect.2 b/tests/f_quota_deallocate_inode/expect.2
new file mode 100644
index 000000000000..802317949959
--- /dev/null
+++ b/tests/f_quota_deallocate_inode/expect.2
@@ -0,0 +1,7 @@
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+test_filesys: 13/256 files (15.4% non-contiguous), 1157/8192 blocks
+Exit status is 0
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diff --git a/tests/f_quota_deallocate_inode/name b/tests/f_quota_deallocate_inode/name
new file mode 100644
index 000000000000..396887c16f84
--- /dev/null
+++ b/tests/f_quota_deallocate_inode/name
@@ -0,0 +1 @@
+update quota when deallocating bad inode

Re: [PATCH e2fsprogs v3 0/4] quota-related e2fsck fixes and tests

[Theodore Ts'o]

On Fri, 05 Apr 2024 15:24:01 +0100, Luis Henriques (SUSE) wrote:
> Changes since v2:
> 
> Added deallocate_inode() documentation, as suggested by Andreas Dilger
> (and using text he provided).
> 
> And, for reference, here's the cover-letter from v2:
> 
> [...]

Applied, thanks!

[1/4] e2fsck: update quota accounting after directory optimization
      commit: eb782652045e67a5379dd319613b0d3d924901dd
[2/4] e2fsck: update quota when deallocating a bad inode
      commit: eb0680deb908d7da399dd331b7aa35cc1a4dfa2d
[3/4] tests: new test to check quota after directory optimization
      commit: 7805308b7a111c3943d92eab412b048d059ce108
[4/4] tests: new test to check quota after a bad inode deallocation
      commit: c6070404a2bed3ff675fc6500828ab6acee985f1

Best regards,
-- 
Theodore Ts'o <tytso@mit.edu>