Commit 719da39a authored by Chris Mason's avatar Chris Mason
Browse files

Merge branch 'misc-fixes-4.7' of...

Merge branch 'misc-fixes-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.7
parents 4c529900 5f9e1059
......@@ -4133,6 +4133,17 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
* Hint to catch really bogus numbers, bitflips or so, more exact checks are
* done later
*/
if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) {
btrfs_err(fs_info, "bytes_used is too small %llu",
btrfs_super_bytes_used(sb));
ret = -EINVAL;
}
if (!is_power_of_2(btrfs_super_stripesize(sb)) ||
btrfs_super_stripesize(sb) != sectorsize) {
btrfs_err(fs_info, "invalid stripesize %u",
btrfs_super_stripesize(sb));
ret = -EINVAL;
}
if (btrfs_super_num_devices(sb) > (1UL << 31))
printk(KERN_WARNING "BTRFS: suspicious number of devices: %llu\n",
btrfs_super_num_devices(sb));
......
......@@ -24,6 +24,11 @@ int __init btrfs_hash_init(void)
return PTR_ERR_OR_ZERO(tfm);
}
const char* btrfs_crc32c_impl(void)
{
return crypto_tfm_alg_driver_name(crypto_shash_tfm(tfm));
}
void btrfs_hash_exit(void)
{
crypto_free_shash(tfm);
......
......@@ -22,6 +22,7 @@
int __init btrfs_hash_init(void);
void btrfs_hash_exit(void);
const char* btrfs_crc32c_impl(void);
u32 btrfs_crc32c(u32 crc, const void *address, unsigned int length);
......
......@@ -2303,7 +2303,7 @@ static void btrfs_interface_exit(void)
static void btrfs_print_mod_info(void)
{
printk(KERN_INFO "Btrfs loaded"
printk(KERN_INFO "Btrfs loaded, crc32c=%s"
#ifdef CONFIG_BTRFS_DEBUG
", debug=on"
#endif
......@@ -2313,7 +2313,8 @@ static void btrfs_print_mod_info(void)
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
", integrity-checker=on"
#endif
"\n");
"\n",
btrfs_crc32c_impl());
}
static int btrfs_run_sanity_tests(void)
......
......@@ -4241,6 +4241,7 @@ int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info)
if (IS_ERR(uuid_root)) {
ret = PTR_ERR(uuid_root);
btrfs_abort_transaction(trans, tree_root, ret);
btrfs_end_transaction(trans, tree_root);
return ret;
}
......@@ -6258,27 +6259,23 @@ struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
return dev;
}
static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk)
/* Return -EIO if any error, otherwise return 0. */
static int btrfs_check_chunk_valid(struct btrfs_root *root,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk, u64 logical)
{
struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree;
struct map_lookup *map;
struct extent_map *em;
u64 logical;
u64 length;
u64 stripe_len;
u64 devid;
u8 uuid[BTRFS_UUID_SIZE];
int num_stripes;
int ret;
int i;
u16 num_stripes;
u16 sub_stripes;
u64 type;
logical = key->offset;
length = btrfs_chunk_length(leaf, chunk);
stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
/* Validation check */
sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
type = btrfs_chunk_type(leaf, chunk);
if (!num_stripes) {
btrfs_err(root->fs_info, "invalid chunk num_stripes: %u",
num_stripes);
......@@ -6289,6 +6286,11 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
"invalid chunk logical %llu", logical);
return -EIO;
}
if (btrfs_chunk_sector_size(leaf, chunk) != root->sectorsize) {
btrfs_err(root->fs_info, "invalid chunk sectorsize %u",
btrfs_chunk_sector_size(leaf, chunk));
return -EIO;
}
if (!length || !IS_ALIGNED(length, root->sectorsize)) {
btrfs_err(root->fs_info,
"invalid chunk length %llu", length);
......@@ -6300,13 +6302,54 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
return -EIO;
}
if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
btrfs_chunk_type(leaf, chunk)) {
type) {
btrfs_err(root->fs_info, "unrecognized chunk type: %llu",
~(BTRFS_BLOCK_GROUP_TYPE_MASK |
BTRFS_BLOCK_GROUP_PROFILE_MASK) &
btrfs_chunk_type(leaf, chunk));
return -EIO;
}
if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
(type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes < 1) ||
(type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
(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(root->fs_info,
"invalid num_stripes:sub_stripes %u:%u for profile %llu",
num_stripes, sub_stripes,
type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
return -EIO;
}
return 0;
}
static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk)
{
struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree;
struct map_lookup *map;
struct extent_map *em;
u64 logical;
u64 length;
u64 stripe_len;
u64 devid;
u8 uuid[BTRFS_UUID_SIZE];
int num_stripes;
int ret;
int i;
logical = key->offset;
length = btrfs_chunk_length(leaf, chunk);
stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
ret = btrfs_check_chunk_valid(root, leaf, chunk, logical);
if (ret)
return ret;
read_lock(&map_tree->map_tree.lock);
em = lookup_extent_mapping(&map_tree->map_tree, logical, 1);
......@@ -6554,6 +6597,7 @@ int btrfs_read_sys_array(struct btrfs_root *root)
u32 array_size;
u32 len = 0;
u32 cur_offset;
u64 type;
struct btrfs_key key;
ASSERT(BTRFS_SUPER_INFO_SIZE <= root->nodesize);
......@@ -6620,6 +6664,15 @@ int btrfs_read_sys_array(struct btrfs_root *root)
break;
}
type = btrfs_chunk_type(sb, chunk);
if ((type & BTRFS_BLOCK_GROUP_SYSTEM) == 0) {
btrfs_err(root->fs_info,
"invalid chunk type %llu in sys_array at offset %u",
type, cur_offset);
ret = -EIO;
break;
}
len = btrfs_chunk_item_size(num_stripes);
if (cur_offset + len > array_size)
goto out_short_read;
......@@ -6638,12 +6691,14 @@ int btrfs_read_sys_array(struct btrfs_root *root)
sb_array_offset += len;
cur_offset += len;
}
clear_extent_buffer_uptodate(sb);
free_extent_buffer_stale(sb);
return ret;
out_short_read:
printk(KERN_ERR "BTRFS: sys_array too short to read %u bytes at offset %u\n",
len, cur_offset);
clear_extent_buffer_uptodate(sb);
free_extent_buffer_stale(sb);
return -EIO;
}
......@@ -6656,6 +6711,7 @@ int btrfs_read_chunk_tree(struct btrfs_root *root)
struct btrfs_key found_key;
int ret;
int slot;
u64 total_dev = 0;
root = root->fs_info->chunk_root;
......@@ -6697,6 +6753,7 @@ int btrfs_read_chunk_tree(struct btrfs_root *root)
ret = read_one_dev(root, leaf, dev_item);
if (ret)
goto error;
total_dev++;
} else if (found_key.type == BTRFS_CHUNK_ITEM_KEY) {
struct btrfs_chunk *chunk;
chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
......@@ -6706,6 +6763,28 @@ int btrfs_read_chunk_tree(struct btrfs_root *root)
}
path->slots[0]++;
}
/*
* After loading chunk tree, we've got all device information,
* do another round of validation checks.
*/
if (total_dev != root->fs_info->fs_devices->total_devices) {
btrfs_err(root->fs_info,
"super_num_devices %llu mismatch with num_devices %llu found here",
btrfs_super_num_devices(root->fs_info->super_copy),
total_dev);
ret = -EINVAL;
goto error;
}
if (btrfs_super_total_bytes(root->fs_info->super_copy) <
root->fs_info->fs_devices->total_rw_bytes) {
btrfs_err(root->fs_info,
"super_total_bytes %llu mismatch with fs_devices total_rw_bytes %llu",
btrfs_super_total_bytes(root->fs_info->super_copy),
root->fs_info->fs_devices->total_rw_bytes);
ret = -EINVAL;
goto error;
}
ret = 0;
error:
unlock_chunks(root);
......
......@@ -118,7 +118,7 @@ struct btrfs_ioctl_vol_args_v2 {
};
union {
char name[BTRFS_SUBVOL_NAME_MAX + 1];
u64 devid;
__u64 devid;
};
};
......
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