[f2fs-dev] [PATCH 1/2] fsck.f2fs: trigger repairing if filesystem was forced to stop

[Chao Yu <chao@kernel.org>]

In auto/preen mode, let's trigger repairing if filesystem was forced
to stop.

Signed-off-by: Chao Yu <chao@kernel.org>
---
 fsck/fsck.c       |  7 +++++++
 fsck/fsck.h       |  1 +
 fsck/mount.c      | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 include/f2fs_fs.h | 19 ++++++++++++++++++-
 4 files changed, 73 insertions(+), 1 deletion(-)

diff --git a/fsck/fsck.c b/fsck/fsck.c
index 2f6cc72..db14859 100644
--- a/fsck/fsck.c
+++ b/fsck/fsck.c
@@ -3351,6 +3351,7 @@ int fsck_verify(struct f2fs_sb_info *sbi)
 	/* fix global metadata */
 	if (force || (c.fix_on && f2fs_dev_is_writable())) {
 		struct f2fs_checkpoint *cp = F2FS_CKPT(sbi);
+		struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
 
 		if (force || c.bug_on || c.bug_nat_bits || c.quota_fixed) {
 			/* flush nats to write_nit_bits below */
@@ -3366,6 +3367,12 @@ int fsck_verify(struct f2fs_sb_info *sbi)
 			is_set_ckpt_flags(cp, CP_QUOTA_NEED_FSCK_FLAG)) {
 			write_checkpoints(sbi);
 		}
+
+		if (c.abnormal_stop) {
+			memset(sb->s_stop_reason, 0, MAX_STOP_REASON);
+			update_superblock(sb, SB_MASK_ALL);
+		}
+
 		/* to return FSCK_ERROR_CORRECTED */
 		ret = 0;
 	}
diff --git a/fsck/fsck.h b/fsck/fsck.h
index 8234986..6f0b019 100644
--- a/fsck/fsck.h
+++ b/fsck/fsck.h
@@ -237,6 +237,7 @@ extern void update_data_blkaddr(struct f2fs_sb_info *, nid_t, u16, block_t);
 extern void update_nat_blkaddr(struct f2fs_sb_info *, nid_t, nid_t, block_t);
 
 extern void print_raw_sb_info(struct f2fs_super_block *);
+extern bool is_checkpoint_stop(struct f2fs_super_block *, bool);
 extern pgoff_t current_nat_addr(struct f2fs_sb_info *, nid_t, int *);
 
 extern u32 get_free_segments(struct f2fs_sb_info *);
diff --git a/fsck/mount.c b/fsck/mount.c
index aebe363..6b21625 100644
--- a/fsck/mount.c
+++ b/fsck/mount.c
@@ -583,6 +583,34 @@ void print_sb_state(struct f2fs_super_block *sb)
 	MSG(0, "\n");
 }
 
+static char *stop_reason_str[] = {
+	[STOP_CP_REASON_SHUTDOWN]		= "shutdown",
+	[STOP_CP_REASON_FAULT_INJECT]		= "fault_inject",
+	[STOP_CP_REASON_META_PAGE]		= "meta_page",
+	[STOP_CP_REASON_WRITE_FAIL]		= "write_fail",
+	[STOP_CP_REASON_CORRUPTED_SUMMARY]	= "corrupted_summary",
+	[STOP_CP_REASON_UPDATE_INODE]		= "update_inode",
+	[STOP_CP_REASON_FLUSH_FAIL]		= "flush_fail",
+};
+
+void print_sb_stop_reason(struct f2fs_super_block *sb)
+{
+	u8 *reason = sb->s_stop_reason;
+	int i;
+
+	if (!c.force_stop)
+		return;
+
+	MSG(0, "Info: checkpoint stop reason: ");
+
+	for (i = 0; i < STOP_CP_REASON_MAX; i++) {
+		if (reason[i])
+			MSG(0, "%s(%d) ", stop_reason_str[i], reason[i]);
+	}
+
+	MSG(0, "\n");
+}
+
 bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
 					block_t blkaddr, int type)
 {
@@ -966,10 +994,14 @@ int validate_super_block(struct f2fs_sb_info *sbi, enum SB_ADDR sb_addr)
 				VERSION_NAME_LEN);
 		get_kernel_version(c.init_version);
 
+		c.force_stop = is_checkpoint_stop(sbi->raw_super, false);
+		c.abnormal_stop = is_checkpoint_stop(sbi->raw_super, true);
+
 		MSG(0, "Info: MKFS version\n  \"%s\"\n", c.init_version);
 		MSG(0, "Info: FSCK version\n  from \"%s\"\n    to \"%s\"\n",
 					c.sb_version, c.version);
 		print_sb_state(sbi->raw_super);
+		print_sb_stop_reason(sbi->raw_super);
 		return 0;
 	}
 
@@ -1201,6 +1233,20 @@ fail_no_cp:
 	return -EINVAL;
 }
 
+bool is_checkpoint_stop(struct f2fs_super_block *sb, bool abnormal)
+{
+	int i;
+
+	for (i = 0; i < STOP_CP_REASON_MAX; i++) {
+		if (abnormal && i == STOP_CP_REASON_SHUTDOWN)
+			continue;
+		if (sb->s_stop_reason[i])
+			return true;
+	}
+
+	return false;
+}
+
 /*
  * For a return value of 1, caller should further check for c.fix_on state
  * and take appropriate action.
@@ -1210,6 +1256,7 @@ static int f2fs_should_proceed(struct f2fs_super_block *sb, u32 flag)
 	if (!c.fix_on && (c.auto_fix || c.preen_mode)) {
 		if (flag & CP_FSCK_FLAG ||
 			flag & CP_QUOTA_NEED_FSCK_FLAG ||
+			c.abnormal_stop ||
 			(exist_qf_ino(sb) && (flag & CP_ERROR_FLAG))) {
 			c.fix_on = 1;
 		} else if (!c.preen_mode) {
diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h
index c36c623..424eaad 100644
--- a/include/f2fs_fs.h
+++ b/include/f2fs_fs.h
@@ -508,6 +508,8 @@ struct f2fs_configuration {
 	int force;
 	int defset;
 	int bug_on;
+	int force_stop;
+	int abnormal_stop;
 	int bug_nat_bits;
 	bool quota_fixed;
 	int alloc_failed;
@@ -757,6 +759,20 @@ struct f2fs_device {
 
 static_assert(sizeof(struct f2fs_device) == 68, "");
 
+/* reason of stop_checkpoint */
+enum stop_cp_reason {
+	STOP_CP_REASON_SHUTDOWN,
+	STOP_CP_REASON_FAULT_INJECT,
+	STOP_CP_REASON_META_PAGE,
+	STOP_CP_REASON_WRITE_FAIL,
+	STOP_CP_REASON_CORRUPTED_SUMMARY,
+	STOP_CP_REASON_UPDATE_INODE,
+	STOP_CP_REASON_FLUSH_FAIL,
+	STOP_CP_REASON_MAX,
+};
+
+#define	MAX_STOP_REASON			32
+
 struct f2fs_super_block {
 	__le32 magic;			/* Magic Number */
 	__le16 major_ver;		/* Major Version */
@@ -801,7 +817,8 @@ struct f2fs_super_block {
 	__u8 hot_ext_count;		/* # of hot file extension */
 	__le16  s_encoding;		/* Filename charset encoding */
 	__le16  s_encoding_flags;	/* Filename charset encoding flags */
-	__u8 reserved[306];		/* valid reserved region */
+	__u8 s_stop_reason[MAX_STOP_REASON];	/* stop checkpoint reason */
+	__u8 reserved[274];		/* valid reserved region */
 	__le32 crc;			/* checksum of superblock */
 };
 
-- 
2.36.1



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