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Date: Mon, 9 Nov 2020 13:55:17 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Johannes Thumshirn <jthumshirn@...e.de>,
Qu Wenruo <wqu@...e.com>, David Sterba <dsterba@...e.com>,
Ben Hutchings <ben.hutchings@...ethink.co.uk>
Subject: [PATCH 4.19 23/71] btrfs: tree-checker: Make chunk item checker messages more readable
From: Qu Wenruo <wqu@...e.com>
commit f114024376bceb1c0f61a7bad4a72a0f978767af upstream.
Old error message would be something like:
BTRFS error (device dm-3): invalid chunk num_stipres: 0
New error message would be:
Btrfs critical (device dm-3): corrupt superblock syschunk array: chunk_start=2097152, invalid chunk num_stripes: 0
Or
Btrfs critical (device dm-3): corrupt leaf: root=3 block=8388608 slot=3 chunk_start=2097152, invalid chunk num_stripes: 0
And for certain error message, also output expected value.
The error message levels are changed from error to critical.
Reviewed-by: Johannes Thumshirn <jthumshirn@...e.de>
Signed-off-by: Qu Wenruo <wqu@...e.com>
Reviewed-by: David Sterba <dsterba@...e.com>
Signed-off-by: David Sterba <dsterba@...e.com>
[bwh: Cherry-picked for 4.19 to ease backporting later fixes]
Signed-off-by: Ben Hutchings <ben.hutchings@...ethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
fs/btrfs/tree-checker.c | 81 ++++++++++++++++++++++++++++++++++++++++--------
1 file changed, 68 insertions(+), 13 deletions(-)
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -448,6 +448,51 @@ static int check_block_group_item(struct
return 0;
}
+__printf(5, 6)
+__cold
+static void chunk_err(const struct btrfs_fs_info *fs_info,
+ const struct extent_buffer *leaf,
+ const struct btrfs_chunk *chunk, u64 logical,
+ const char *fmt, ...)
+{
+ bool is_sb;
+ struct va_format vaf;
+ va_list args;
+ int i;
+ int slot = -1;
+
+ /* Only superblock eb is able to have such small offset */
+ is_sb = (leaf->start == BTRFS_SUPER_INFO_OFFSET);
+
+ if (!is_sb) {
+ /*
+ * Get the slot number by iterating through all slots, this
+ * would provide better readability.
+ */
+ for (i = 0; i < btrfs_header_nritems(leaf); i++) {
+ if (btrfs_item_ptr_offset(leaf, i) ==
+ (unsigned long)chunk) {
+ slot = i;
+ break;
+ }
+ }
+ }
+ va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ if (is_sb)
+ btrfs_crit(fs_info,
+ "corrupt superblock syschunk array: chunk_start=%llu, %pV",
+ logical, &vaf);
+ else
+ btrfs_crit(fs_info,
+ "corrupt leaf: root=%llu block=%llu slot=%d chunk_start=%llu, %pV",
+ BTRFS_CHUNK_TREE_OBJECTID, leaf->start, slot,
+ logical, &vaf);
+ va_end(args);
+}
+
/*
* The common chunk check which could also work on super block sys chunk array.
*
@@ -473,31 +518,38 @@ int btrfs_check_chunk_valid(struct btrfs
type = btrfs_chunk_type(leaf, chunk);
if (!num_stripes) {
- btrfs_err(fs_info, "invalid chunk num_stripes: %u",
- num_stripes);
+ chunk_err(fs_info, leaf, chunk, logical,
+ "invalid chunk num_stripes, have %u", num_stripes);
return -EIO;
}
if (!IS_ALIGNED(logical, fs_info->sectorsize)) {
- btrfs_err(fs_info, "invalid chunk logical %llu", logical);
+ chunk_err(fs_info, leaf, chunk, logical,
+ "invalid chunk logical, have %llu should aligned to %u",
+ logical, fs_info->sectorsize);
return -EIO;
}
if (btrfs_chunk_sector_size(leaf, chunk) != fs_info->sectorsize) {
- btrfs_err(fs_info, "invalid chunk sectorsize %u",
- btrfs_chunk_sector_size(leaf, chunk));
+ chunk_err(fs_info, leaf, chunk, logical,
+ "invalid chunk sectorsize, have %u expect %u",
+ btrfs_chunk_sector_size(leaf, chunk),
+ fs_info->sectorsize);
return -EIO;
}
if (!length || !IS_ALIGNED(length, fs_info->sectorsize)) {
- btrfs_err(fs_info, "invalid chunk length %llu", length);
+ chunk_err(fs_info, leaf, chunk, logical,
+ "invalid chunk length, have %llu", length);
return -EIO;
}
if (!is_power_of_2(stripe_len) || stripe_len != BTRFS_STRIPE_LEN) {
- btrfs_err(fs_info, "invalid chunk stripe length: %llu",
+ chunk_err(fs_info, leaf, chunk, logical,
+ "invalid chunk stripe length: %llu",
stripe_len);
return -EIO;
}
if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
type) {
- btrfs_err(fs_info, "unrecognized chunk type: %llu",
+ chunk_err(fs_info, leaf, chunk, logical,
+ "unrecognized chunk type: 0x%llx",
~(BTRFS_BLOCK_GROUP_TYPE_MASK |
BTRFS_BLOCK_GROUP_PROFILE_MASK) &
btrfs_chunk_type(leaf, chunk));
@@ -505,14 +557,17 @@ int btrfs_check_chunk_valid(struct btrfs
}
if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) {
- btrfs_err(fs_info, "missing chunk type flag: 0x%llx", type);
+ chunk_err(fs_info, leaf, chunk, logical,
+ "missing chunk type flag, have 0x%llx one bit must be set in 0x%llx",
+ type, BTRFS_BLOCK_GROUP_TYPE_MASK);
return -EIO;
}
if ((type & BTRFS_BLOCK_GROUP_SYSTEM) &&
(type & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA))) {
- btrfs_err(fs_info,
- "system chunk with data or metadata type: 0x%llx", type);
+ chunk_err(fs_info, leaf, chunk, logical,
+ "system chunk with data or metadata type: 0x%llx",
+ type);
return -EIO;
}
@@ -523,7 +578,7 @@ int btrfs_check_chunk_valid(struct btrfs
if (!mixed) {
if ((type & BTRFS_BLOCK_GROUP_METADATA) &&
(type & BTRFS_BLOCK_GROUP_DATA)) {
- btrfs_err(fs_info,
+ chunk_err(fs_info, leaf, chunk, logical,
"mixed chunk type in non-mixed mode: 0x%llx", type);
return -EIO;
}
@@ -535,7 +590,7 @@ int btrfs_check_chunk_valid(struct btrfs
(type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
(type & BTRFS_BLOCK_GROUP_DUP && num_stripes != 2) ||
((type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 && num_stripes != 1)) {
- btrfs_err(fs_info,
+ chunk_err(fs_info, leaf, chunk, logical,
"invalid num_stripes:sub_stripes %u:%u for profile %llu",
num_stripes, sub_stripes,
type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
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