Date:   Sun, 25 Mar 2018 12:01:33 -0700
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     tytso@....edu
Cc:     linux-ext4@...r.kernel.org
Subject: [PATCH v2 5/5] e2fsck: adjust quota counters when clearing orphaned
 inodes

From: Darrick J. Wong <darrick.wong@...cle.com>

If e2fsck encounters a filesystem that supports internal quotas, it is
responsible for adjusting the quota counters if it decides to clear any
orphaned inodes.  Therefore, we must read the quota files, adjust the
counters, and write the quota files back out when we are done.

Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
v2: fix sizeof(*inode) fubar
---
 e2fsck/super.c             |  121 +++++++++++++++++++++++++++++++++++++-------
 lib/support/mkquota.c      |   12 +++-
 tests/f_orphquot/expect    |   10 ++++
 tests/f_orphquot/image.bz2 |  Bin
 tests/f_orphquot/script    |   26 +++++++++
 5 files changed, 145 insertions(+), 24 deletions(-)
 create mode 100644 tests/f_orphquot/expect
 create mode 100644 tests/f_orphquot/image.bz2
 create mode 100644 tests/f_orphquot/script

diff --git a/e2fsck/super.c b/e2fsck/super.c
index 5e29b64..9c0e0e7 100644
--- a/e2fsck/super.c
+++ b/e2fsck/super.c
@@ -72,6 +72,7 @@ struct process_block_struct {
 	int		abort;
 	errcode_t	errcode;
 	blk64_t last_cluster;
+	struct ext2_inode_large *inode;
 };
 
 static int release_inode_block(ext2_filsys fs,
@@ -168,6 +169,8 @@ static int release_inode_block(ext2_filsys fs,
 		retval |= BLOCK_CHANGED;
 	}
 
+	if (ctx->qctx)
+		quota_data_sub(ctx->qctx, pb->inode, 0, ctx->fs->blocksize);
 	ext2fs_block_alloc_stats2(fs, blk, -1);
 	ctx->free_blocks++;
 	return retval;
@@ -179,15 +182,16 @@ static int release_inode_block(ext2_filsys fs,
  * not deleted.
  */
 static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
-				struct ext2_inode *inode, char *block_buf,
+				struct ext2_inode_large *inode, char *block_buf,
 				struct problem_context *pctx)
 {
 	struct process_block_struct 	pb;
 	ext2_filsys			fs = ctx->fs;
+	blk64_t				blk;
 	errcode_t			retval;
 	__u32				count;
 
-	if (!ext2fs_inode_has_valid_blocks2(fs, inode))
+	if (!ext2fs_inode_has_valid_blocks2(fs, EXT2_INODE(inode)))
 		return 0;
 
 	pb.buf = block_buf + 3 * ctx->fs->blocksize;
@@ -196,6 +200,7 @@ static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
 	pb.errcode = 0;
 	pb.pctx = pctx;
 	pb.last_cluster = 0;
+	pb.inode = inode;
 	if (inode->i_links_count) {
 		pb.truncating = 1;
 		pb.truncate_block = (e2_blkcnt_t)
@@ -220,15 +225,17 @@ static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
 		return 1;
 
 	/* Refresh the inode since ext2fs_block_iterate may have changed it */
-	e2fsck_read_inode(ctx, ino, inode, "release_inode_blocks");
+	e2fsck_read_inode_full(ctx, ino, EXT2_INODE(inode), sizeof(*inode),
+			"release_inode_blocks");
 
 	if (pb.truncated_blocks)
-		ext2fs_iblk_sub_blocks(fs, inode, pb.truncated_blocks);
+		ext2fs_iblk_sub_blocks(fs, EXT2_INODE(inode),
+				pb.truncated_blocks);
 
-	if (ext2fs_file_acl_block(fs, inode)) {
-		retval = ext2fs_adjust_ea_refcount3(fs,
-				ext2fs_file_acl_block(fs, inode),
-				block_buf, -1, &count, ino);
+	blk = ext2fs_file_acl_block(fs, EXT2_INODE(inode));
+	if (blk) {
+		retval = ext2fs_adjust_ea_refcount3(fs, blk, block_buf, -1,
+				&count, ino);
 		if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
 			retval = 0;
 			count = 1;
@@ -240,15 +247,68 @@ static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
 			return 1;
 		}
 		if (count == 0) {
-			ext2fs_block_alloc_stats2(fs,
-					ext2fs_file_acl_block(fs, inode), -1);
+			if (ctx->qctx)
+				quota_data_sub(ctx->qctx, inode, 0,
+						ctx->fs->blocksize);
+			ext2fs_block_alloc_stats2(fs, blk, -1);
 			ctx->free_blocks++;
 		}
-		ext2fs_file_acl_block_set(fs, inode, 0);
+		ext2fs_file_acl_block_set(fs, EXT2_INODE(inode), 0);
 	}
 	return 0;
 }
 
+/* Load all quota data in preparation for orphan clearing. */
+static errcode_t e2fsck_read_all_quotas(e2fsck_t ctx)
+{
+	ext2_ino_t qf_ino;
+	enum quota_type qtype;
+	errcode_t retval = 0;
+
+	if (!ext2fs_has_feature_quota(ctx->fs->super))
+		return retval;
+
+	retval = quota_init_context(&ctx->qctx, ctx->fs, 0);
+	if (retval)
+		return retval;
+
+	for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
+		qf_ino = *quota_sb_inump(ctx->fs->super, qtype);
+		if (qf_ino == 0)
+			continue;
+
+		retval = quota_update_limits(ctx->qctx, qf_ino, qtype);
+		if (retval)
+			break;
+	}
+	if (retval)
+		quota_release_context(&ctx->qctx);
+	return retval;
+}
+
+/* Write all the quota info to disk. */
+static errcode_t e2fsck_write_all_quotas(e2fsck_t ctx)
+{
+	struct problem_context pctx;
+	enum quota_type qtype;
+
+	if (!ext2fs_has_feature_quota(ctx->fs->super))
+		return 0;
+
+	clear_problem_context(&pctx);
+	for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
+		pctx.num = qtype;
+		pctx.errcode = quota_write_inode(ctx->qctx, 1 << qtype);
+		if (pctx.errcode) {
+			fix_problem(ctx, PR_6_WRITE_QUOTAS, &pctx);
+			break;
+		}
+	}
+
+	quota_release_context(&ctx->qctx);
+	return pctx.errcode;
+}
+
 /*
  * This function releases all of the orphan inodes.  It returns 1 if
  * it hit some error, and 0 on success.
@@ -257,13 +317,20 @@ static int release_orphan_inodes(e2fsck_t ctx)
 {
 	ext2_filsys fs = ctx->fs;
 	ext2_ino_t	ino, next_ino;
-	struct ext2_inode inode;
+	struct ext2_inode_large inode;
 	struct problem_context pctx;
 	char *block_buf;
 
 	if ((ino = fs->super->s_last_orphan) == 0)
 		return 0;
 
+	clear_problem_context(&pctx);
+	pctx.errcode = e2fsck_read_all_quotas(ctx);
+	if (pctx.errcode) {
+		fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
+		return 1;
+	}
+
 	/*
 	 * Win or lose, we won't be using the head of the orphan inode
 	 * list again.
@@ -276,15 +343,18 @@ static int release_orphan_inodes(e2fsck_t ctx)
 	 * list, since the orphan list can't be trusted; and we're
 	 * going to be running a full e2fsck run anyway...
 	 */
-	if (fs->super->s_state & EXT2_ERROR_FS)
+	if (fs->super->s_state & EXT2_ERROR_FS) {
+		if (ctx->qctx)
+			quota_release_context(&ctx->qctx);
 		return 0;
+	}
 
 	if ((ino < EXT2_FIRST_INODE(fs->super)) ||
 	    (ino > fs->super->s_inodes_count)) {
 		clear_problem_context(&pctx);
 		pctx.ino = ino;
 		fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
-		return 1;
+		goto err_qctx;
 	}
 
 	block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
@@ -292,10 +362,11 @@ static int release_orphan_inodes(e2fsck_t ctx)
 	e2fsck_read_bitmaps(ctx);
 
 	while (ino) {
-		e2fsck_read_inode(ctx, ino, &inode, "release_orphan_inodes");
+		e2fsck_read_inode_full(ctx, ino, EXT2_INODE(&inode),
+				sizeof(inode), "release_orphan_inodes");
 		clear_problem_context(&pctx);
 		pctx.ino = ino;
-		pctx.inode = &inode;
+		pctx.inode = EXT2_INODE(&inode);
 		pctx.str = inode.i_links_count ? _("Truncating") :
 			_("Clearing");
 
@@ -307,13 +378,15 @@ static int release_orphan_inodes(e2fsck_t ctx)
 		     (next_ino > fs->super->s_inodes_count))) {
 			pctx.ino = next_ino;
 			fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
-			goto return_abort;
+			goto err_buf;
 		}
 
 		if (release_inode_blocks(ctx, ino, &inode, block_buf, &pctx))
-			goto return_abort;
+			goto err_buf;
 
 		if (!inode.i_links_count) {
+			if (ctx->qctx)
+				quota_data_inodes(ctx->qctx, &inode, ino, -1);
 			ext2fs_inode_alloc_stats2(fs, ino, -1,
 						  LINUX_S_ISDIR(inode.i_mode));
 			ctx->free_inodes++;
@@ -321,13 +394,21 @@ static int release_orphan_inodes(e2fsck_t ctx)
 		} else {
 			inode.i_dtime = 0;
 		}
-		e2fsck_write_inode(ctx, ino, &inode, "delete_file");
+		e2fsck_write_inode_full(ctx, ino, EXT2_INODE(&inode),
+				sizeof(inode), "delete_file");
 		ino = next_ino;
 	}
 	ext2fs_free_mem(&block_buf);
+	pctx.errcode = e2fsck_write_all_quotas(ctx);
+	if (pctx.errcode)
+		goto err;
 	return 0;
-return_abort:
+err_buf:
 	ext2fs_free_mem(&block_buf);
+err_qctx:
+	if (ctx->qctx)
+		quota_release_context(&ctx->qctx);
+err:
 	return 1;
 }
 
diff --git a/lib/support/mkquota.c b/lib/support/mkquota.c
index e65c95b..efc37cb 100644
--- a/lib/support/mkquota.c
+++ b/lib/support/mkquota.c
@@ -516,6 +516,7 @@ struct scan_dquots_data {
 	dict_t		*quota_dict;
 	int             update_limits; /* update limits from disk */
 	int		update_usage;
+	int		check_consistency;
 	int		usage_is_inconsistent;
 };
 
@@ -533,8 +534,9 @@ static int scan_dquots_callback(struct dquot *dquot, void *cb_data)
 	print_dquot("dsk", dquot);
 
 	/* Check if there is inconsistency */
-	if (dq->dq_dqb.dqb_curspace != dquot->dq_dqb.dqb_curspace ||
-	    dq->dq_dqb.dqb_curinodes != dquot->dq_dqb.dqb_curinodes) {
+	if (scan_data->check_consistency &&
+	    (dq->dq_dqb.dqb_curspace != dquot->dq_dqb.dqb_curspace ||
+	     dq->dq_dqb.dqb_curinodes != dquot->dq_dqb.dqb_curinodes)) {
 		scan_data->usage_is_inconsistent = 1;
 		fprintf(stderr, "[QUOTA WARNING] Usage inconsistent for ID %u:"
 			"actual (%lld, %lld) != expected (%lld, %lld)\n",
@@ -568,8 +570,9 @@ static errcode_t quota_read_all_dquots(struct quota_handle *qh,
 	struct scan_dquots_data scan_data;
 
 	scan_data.quota_dict = qctx->quota_dict[qh->qh_type];
-	scan_data.update_limits = update_limits;
-	scan_data.update_usage = 0;
+	scan_data.check_consistency = 0;
+	scan_data.update_limits = 0;
+	scan_data.update_usage = 1;
 
 	return qh->qh_ops->scan_dquots(qh, scan_dquots_callback, &scan_data);
 }
@@ -659,6 +662,7 @@ errcode_t quota_compare_and_update(quota_ctx_t qctx, enum quota_type qtype,
 	scan_data.quota_dict = qctx->quota_dict[qtype];
 	scan_data.update_limits = 1;
 	scan_data.update_usage = 0;
+	scan_data.check_consistency = 1;
 	scan_data.usage_is_inconsistent = 0;
 	err = qh.qh_ops->scan_dquots(&qh, scan_dquots_callback, &scan_data);
 	if (err) {
diff --git a/tests/f_orphquot/expect b/tests/f_orphquot/expect
new file mode 100644
index 0000000..90a7813
--- /dev/null
+++ b/tests/f_orphquot/expect
@@ -0,0 +1,10 @@
+Clearing orphaned inode 12 (uid=0, gid=0, mode=0100644, size=3842048)
+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_filesystem: ***** FILE SYSTEM WAS MODIFIED *****
+test_filesystem: 11/512 files (9.1% non-contiguous), 1070/2048 blocks
+Exit status is 0
diff --git a/tests/f_orphquot/image.bz2 b/tests/f_orphquot/image.bz2
new file mode 100644
index 0000000000000000000000000000000000000000..44c831852b0740019705c1ffbafa3d37cc561da8
GIT binary patch
literal 1327
zcmV+~1<?9JT4*^jL0KkKSs|BC`v3sQfB*me|MuJ8ynp=vTV5~!@...^Ud_+_UmRWU
z)g`^x-rUdx{s27y6r)uTWhBxv8YYiMqY06t69AfR383_vFq&l07$azD7-RwgnkEQj
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literal 0
HcmV?d00001

diff --git a/tests/f_orphquot/script b/tests/f_orphquot/script
new file mode 100644
index 0000000..acdf567
--- /dev/null
+++ b/tests/f_orphquot/script
@@ -0,0 +1,26 @@
+test_description="e2fsck with quota and orphan inodes"
+OUT=$test_name.log
+EXP=$test_dir/expect
+
+bzip2 -dc < $test_dir/image.bz2 > $TMPFILE
+
+rm -rf $OUT
+$FSCK -f -y -N test_filesystem $TMPFILE > $OUT.new 2>&1
+status=$?
+echo Exit status is $status >> $OUT.new
+sed -f $cmd_dir/filter.sed $OUT.new >> $OUT
+rm -f $OUT.new
+
+cmp -s $OUT $EXP
+status=$?
+
+if [ "$status" = 0 ] ; then
+	echo "$test_name: $test_description: ok"
+	touch $test_name.ok
+else
+	echo "$test_name: $test_description: failed"
+	diff $DIFF_OPTS $EXP $OUT > $test_name.failed
+	rm -f tmp_expect
+fi
+
+unset IMAGE FSCK_OPT OUT EXP

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