#include "print-tree.h"
#include "volumes.h"
#include "utils.h"
+#include "kernel-lib/raid56.h"
struct stripe {
struct btrfs_device *dev;
list_add(&device->dev_list, &fs_devices->devices);
device->fs_devices = fs_devices;
} else if (!device->name || strcmp(device->name, path)) {
- char *name = strdup(path);
+ char *name;
+
+ /*
+ * The existing device has newer generation, so this one could
+ * be a stale one, don't add it.
+ */
+ if (found_transid < device->generation) {
+ warning(
+ "adding device %s gen %llu but found an existing device %s gen %llu",
+ path, found_transid, device->name,
+ device->generation);
+ return -EEXIST;
+ }
+
+ name = strdup(path);
if (!name)
return -ENOMEM;
kfree(device->name);
{
struct btrfs_fs_devices *seed_devices;
struct btrfs_device *device;
+ int ret = 0;
again:
if (!fs_devices)
device = list_entry(fs_devices->devices.next,
struct btrfs_device, dev_list);
if (device->fd != -1) {
- fsync(device->fd);
+ if (fsync(device->fd) == -1) {
+ warning("fsync on device %llu failed: %s",
+ device->devid, strerror(errno));
+ ret = -errno;
+ }
if (posix_fadvise(device->fd, 0, 0, POSIX_FADV_DONTNEED))
fprintf(stderr, "Warning, could not drop caches\n");
close(device->fd);
free(fs_devices);
}
- return 0;
+ return ret;
}
void btrfs_close_all_devices(void)
* used by the boot loader (grub for example), so we make sure to start
* at an offset of at least 1MB.
*/
- min_search_start = max(root->fs_info->alloc_start, 1024ull * 1024);
+ min_search_start = max(root->fs_info->alloc_start, (u64)SZ_1M);
search_start = max(search_start, min_search_start);
path = btrfs_alloc_path();
return ret;
}
-static int find_next_chunk(struct btrfs_root *root, u64 objectid, u64 *offset)
+static int find_next_chunk(struct btrfs_fs_info *fs_info, u64 *offset)
{
+ struct btrfs_root *root = fs_info->chunk_root;
struct btrfs_path *path;
int ret;
struct btrfs_key key;
if (!path)
return -ENOMEM;
- key.objectid = objectid;
+ key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
key.offset = (u64)-1;
key.type = BTRFS_CHUNK_ITEM_KEY;
} else {
btrfs_item_key_to_cpu(path->nodes[0], &found_key,
path->slots[0]);
- if (found_key.objectid != objectid)
+ if (found_key.objectid != BTRFS_FIRST_CHUNK_TREE_OBJECTID)
*offset = 0;
else {
chunk = btrfs_item_ptr(path->nodes[0], path->slots[0],
* the btrfs_device struct should be fully filled in
*/
int btrfs_add_device(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
+ struct btrfs_fs_info *fs_info,
struct btrfs_device *device)
{
int ret;
struct btrfs_dev_item *dev_item;
struct extent_buffer *leaf;
struct btrfs_key key;
+ struct btrfs_root *root = fs_info->chunk_root;
unsigned long ptr;
u64 free_devid = 0;
- root = root->fs_info->chunk_root;
-
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
ptr = (unsigned long)btrfs_device_uuid(dev_item);
write_extent_buffer(leaf, device->uuid, ptr, BTRFS_UUID_SIZE);
ptr = (unsigned long)btrfs_device_fsid(dev_item);
- write_extent_buffer(leaf, root->fs_info->fsid, ptr, BTRFS_UUID_SIZE);
+ write_extent_buffer(leaf, fs_info->fsid, ptr, BTRFS_UUID_SIZE);
btrfs_mark_buffer_dirty(leaf);
ret = 0;
return ret;
}
-int btrfs_add_system_chunk(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- struct btrfs_key *key,
+int btrfs_add_system_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
struct btrfs_chunk *chunk, int item_size)
{
- struct btrfs_super_block *super_copy = root->fs_info->super_copy;
+ struct btrfs_super_block *super_copy = fs_info->super_copy;
struct btrfs_disk_key disk_key;
u32 array_size;
u8 *ptr;
/ sizeof(struct btrfs_stripe) + 1)
int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
- struct btrfs_root *extent_root, u64 *start,
+ struct btrfs_fs_info *info, u64 *start,
u64 *num_bytes, u64 type)
{
u64 dev_offset;
- struct btrfs_fs_info *info = extent_root->fs_info;
+ struct btrfs_root *extent_root = info->extent_root;
struct btrfs_root *chunk_root = info->chunk_root;
struct btrfs_stripe *stripes;
struct btrfs_device *device = NULL;
struct list_head *dev_list = &info->fs_devices->devices;
struct list_head *cur;
struct map_lookup *map;
- int min_stripe_size = 1 * 1024 * 1024;
- u64 calc_size = 8 * 1024 * 1024;
+ int min_stripe_size = SZ_1M;
+ u64 calc_size = SZ_8M;
u64 min_free;
u64 max_chunk_size = 4 * calc_size;
u64 avail = 0;
return -ENOSPC;
}
- if (type & (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
- BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6 |
- BTRFS_BLOCK_GROUP_RAID10 |
- BTRFS_BLOCK_GROUP_DUP)) {
+ if (type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
if (type & BTRFS_BLOCK_GROUP_SYSTEM) {
- calc_size = 8 * 1024 * 1024;
+ calc_size = SZ_8M;
max_chunk_size = calc_size * 2;
- min_stripe_size = 1 * 1024 * 1024;
+ min_stripe_size = SZ_1M;
max_stripes = BTRFS_MAX_DEVS_SYS_CHUNK;
} else if (type & BTRFS_BLOCK_GROUP_DATA) {
- calc_size = 1024 * 1024 * 1024;
+ calc_size = SZ_1G;
max_chunk_size = 10 * calc_size;
- min_stripe_size = 64 * 1024 * 1024;
+ min_stripe_size = SZ_64M;
max_stripes = BTRFS_MAX_DEVS(chunk_root);
} else if (type & BTRFS_BLOCK_GROUP_METADATA) {
- calc_size = 1024 * 1024 * 1024;
+ calc_size = SZ_1G;
max_chunk_size = 4 * calc_size;
- min_stripe_size = 32 * 1024 * 1024;
+ min_stripe_size = SZ_32M;
max_stripes = BTRFS_MAX_DEVS(chunk_root);
}
}
}
return -ENOSPC;
}
- ret = find_next_chunk(chunk_root, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
- &offset);
+ ret = find_next_chunk(info, &offset);
if (ret)
return ret;
key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
btrfs_set_stack_chunk_num_stripes(chunk, num_stripes);
btrfs_set_stack_chunk_io_align(chunk, stripe_len);
btrfs_set_stack_chunk_io_width(chunk, stripe_len);
- btrfs_set_stack_chunk_sector_size(chunk, extent_root->sectorsize);
+ btrfs_set_stack_chunk_sector_size(chunk, info->sectorsize);
btrfs_set_stack_chunk_sub_stripes(chunk, sub_stripes);
- map->sector_size = extent_root->sectorsize;
+ map->sector_size = info->sectorsize;
map->stripe_len = stripe_len;
map->io_align = stripe_len;
map->io_width = stripe_len;
BUG_ON(ret);
if (type & BTRFS_BLOCK_GROUP_SYSTEM) {
- ret = btrfs_add_system_chunk(trans, chunk_root, &key,
+ ret = btrfs_add_system_chunk(info, &key,
chunk, btrfs_chunk_item_size(num_stripes));
BUG_ON(ret);
}
* occupied.
*/
int btrfs_alloc_data_chunk(struct btrfs_trans_handle *trans,
- struct btrfs_root *extent_root, u64 *start,
+ struct btrfs_fs_info *info, u64 *start,
u64 num_bytes, u64 type, int convert)
{
u64 dev_offset;
- struct btrfs_fs_info *info = extent_root->fs_info;
+ struct btrfs_root *extent_root = info->extent_root;
struct btrfs_root *chunk_root = info->chunk_root;
struct btrfs_stripe *stripes;
struct btrfs_device *device = NULL;
struct list_head *dev_list = &info->fs_devices->devices;
struct list_head *cur;
struct map_lookup *map;
- u64 calc_size = 8 * 1024 * 1024;
+ u64 calc_size = SZ_8M;
int num_stripes = 1;
int sub_stripes = 0;
int ret;
key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
key.type = BTRFS_CHUNK_ITEM_KEY;
if (convert) {
- if (*start != round_down(*start, extent_root->sectorsize)) {
+ if (*start != round_down(*start, info->sectorsize)) {
error("DATA chunk start not sectorsize aligned: %llu",
(unsigned long long)*start);
return -EINVAL;
} else {
u64 tmp;
- ret = find_next_chunk(chunk_root,
- BTRFS_FIRST_CHUNK_TREE_OBJECTID,
- &tmp);
+ ret = find_next_chunk(info, &tmp);
key.offset = tmp;
if (ret)
return ret;
btrfs_set_stack_chunk_num_stripes(chunk, num_stripes);
btrfs_set_stack_chunk_io_align(chunk, stripe_len);
btrfs_set_stack_chunk_io_width(chunk, stripe_len);
- btrfs_set_stack_chunk_sector_size(chunk, extent_root->sectorsize);
+ btrfs_set_stack_chunk_sector_size(chunk, info->sectorsize);
btrfs_set_stack_chunk_sub_stripes(chunk, sub_stripes);
- map->sector_size = extent_root->sectorsize;
+ map->sector_size = info->sectorsize;
map->stripe_len = stripe_len;
map->io_align = stripe_len;
map->io_width = stripe_len;
return ret;
}
-int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len)
+int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len)
{
+ struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct cache_extent *ce;
struct map_lookup *map;
int ret;
return ret;
}
-int btrfs_next_bg(struct btrfs_mapping_tree *map_tree, u64 *logical,
- u64 *size, u64 type)
+int btrfs_next_bg(struct btrfs_fs_info *fs_info, u64 *logical,
+ u64 *size, u64 type)
{
+ struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct cache_extent *ce;
struct map_lookup *map;
u64 cur = *logical;
*size = ce->size;
return 0;
}
+ if (!cur)
+ ce = next_cache_extent(ce);
}
return -ENOENT;
}
-int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
+int btrfs_rmap_block(struct btrfs_fs_info *fs_info,
u64 chunk_start, u64 physical, u64 devid,
u64 **logical, int *naddrs, int *stripe_len)
{
+ struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct cache_extent *ce;
struct map_lookup *map;
u64 *buf;
}
}
-int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
+int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
u64 logical, u64 *length,
struct btrfs_multi_bio **multi_ret, int mirror_num,
u64 **raid_map_ret)
{
- return __btrfs_map_block(map_tree, rw, logical, length, NULL,
+ return __btrfs_map_block(fs_info, rw, logical, length, NULL,
multi_ret, mirror_num, raid_map_ret);
}
-int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
- u64 logical, u64 *length, u64 *type,
- struct btrfs_multi_bio **multi_ret, int mirror_num,
- u64 **raid_map_ret)
+int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
+ u64 logical, u64 *length, u64 *type,
+ struct btrfs_multi_bio **multi_ret, int mirror_num,
+ u64 **raid_map_ret)
{
+ struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct cache_extent *ce;
struct map_lookup *map;
u64 offset;
return 0;
}
-struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid,
+struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
u8 *uuid, u8 *fsid)
{
struct btrfs_device *device;
struct btrfs_fs_devices *cur_devices;
- cur_devices = root->fs_info->fs_devices;
+ cur_devices = fs_info->fs_devices;
while (cur_devices) {
if (!fsid ||
(!memcmp(cur_devices->fsid, fsid, BTRFS_UUID_SIZE) ||
- root->fs_info->ignore_fsid_mismatch)) {
+ fs_info->ignore_fsid_mismatch)) {
device = __find_device(&cur_devices->devices,
devid, uuid);
if (device)
return NULL;
}
-int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset)
+int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset)
{
struct cache_extent *ce;
struct map_lookup *map;
- struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree;
+ struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
int readonly = 0;
int i;
* corresponding chunk, we will rebuild it later
*/
ce = search_cache_extent(&map_tree->cache_tree, chunk_offset);
- if (!root->fs_info->is_chunk_recover)
+ if (!fs_info->is_chunk_recover)
BUG_ON(!ce);
else
return 0;
* slot == -1: SYSTEM chunk
* return -EIO on error, otherwise return 0
*/
-int btrfs_check_chunk_valid(struct btrfs_root *root,
+int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk,
int slot, u64 logical)
u16 num_stripes;
u16 sub_stripes;
u64 type;
+ u32 chunk_ondisk_size;
+ u32 sectorsize = fs_info->sectorsize;
length = btrfs_chunk_length(leaf, chunk);
stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
/*
* These valid checks may be insufficient to cover every corner cases.
*/
- if (!IS_ALIGNED(logical, root->sectorsize)) {
+ if (!IS_ALIGNED(logical, sectorsize)) {
error("invalid chunk logical %llu", logical);
return -EIO;
}
- if (btrfs_chunk_sector_size(leaf, chunk) != root->sectorsize) {
+ if (btrfs_chunk_sector_size(leaf, chunk) != sectorsize) {
error("invalid chunk sectorsize %llu",
(unsigned long long)btrfs_chunk_sector_size(leaf, chunk));
return -EIO;
}
- if (!length || !IS_ALIGNED(length, root->sectorsize)) {
+ if (!length || !IS_ALIGNED(length, sectorsize)) {
error("invalid chunk length %llu", length);
return -EIO;
}
BTRFS_BLOCK_GROUP_PROFILE_MASK) & type);
return -EIO;
}
+ if (!(type & BTRFS_BLOCK_GROUP_TYPE_MASK)) {
+ error("missing chunk type flag: %llu", type);
+ return -EIO;
+ }
+ if (!(is_power_of_2(type & BTRFS_BLOCK_GROUP_PROFILE_MASK) ||
+ (type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)) {
+ error("conflicting chunk type detected: %llu", type);
+ return -EIO;
+ }
+ if ((type & BTRFS_BLOCK_GROUP_PROFILE_MASK) &&
+ !is_power_of_2(type & BTRFS_BLOCK_GROUP_PROFILE_MASK)) {
+ error("conflicting chunk profile detected: %llu", type);
+ return -EIO;
+ }
+
+ chunk_ondisk_size = btrfs_chunk_item_size(num_stripes);
/*
* Btrfs_chunk contains at least one stripe, and for sys_chunk
* it can't exceed the system chunk array size
* For normal chunk, it should match its chunk item size.
*/
if (num_stripes < 1 ||
- (slot == -1 && sizeof(struct btrfs_stripe) * num_stripes >
- BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) ||
- (slot >= 0 && sizeof(struct btrfs_stripe) * (num_stripes - 1) >
- btrfs_item_size_nr(leaf, slot))) {
+ (slot == -1 && chunk_ondisk_size > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) ||
+ (slot >= 0 && chunk_ondisk_size > btrfs_item_size_nr(leaf, slot))) {
error("invalid num_stripes: %u", num_stripes);
return -EIO;
}
/*
* Device number check against profile
*/
- if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes == 0) ||
+ if ((type & BTRFS_BLOCK_GROUP_RAID10 && (sub_stripes != 2 ||
+ !IS_ALIGNED(num_stripes, sub_stripes))) ||
(type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes < 1) ||
(type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
(type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
*
* For sys chunk in superblock, pass -1 to indicate sys chunk.
*/
-static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
+static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk, int slot)
{
- struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree;
+ struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct map_lookup *map;
struct cache_extent *ce;
u64 logical;
length = btrfs_chunk_length(leaf, chunk);
num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
/* Validation check */
- ret = btrfs_check_chunk_valid(root, leaf, chunk, slot, logical);
+ ret = btrfs_check_chunk_valid(fs_info, leaf, chunk, slot, logical);
if (ret) {
error("%s checksums match, but it has an invalid chunk, %s",
(slot == -1) ? "Superblock" : "Metadata",
read_extent_buffer(leaf, uuid, (unsigned long)
btrfs_stripe_dev_uuid_nr(chunk, i),
BTRFS_UUID_SIZE);
- map->stripes[i].dev = btrfs_find_device(root, devid, uuid,
+ map->stripes[i].dev = btrfs_find_device(fs_info, devid, uuid,
NULL);
if (!map->stripes[i].dev) {
map->stripes[i].dev = fill_missing_device(devid);
printf("warning, device %llu is missing\n",
(unsigned long long)devid);
list_add(&map->stripes[i].dev->dev_list,
- &root->fs_info->fs_devices->devices);
+ &fs_info->fs_devices->devices);
}
}
return 0;
}
-static int open_seed_devices(struct btrfs_root *root, u8 *fsid)
+static int open_seed_devices(struct btrfs_fs_info *fs_info, u8 *fsid)
{
struct btrfs_fs_devices *fs_devices;
int ret;
- fs_devices = root->fs_info->fs_devices->seed;
+ fs_devices = fs_info->fs_devices->seed;
while (fs_devices) {
if (!memcmp(fs_devices->fsid, fsid, BTRFS_UUID_SIZE)) {
ret = 0;
if (ret)
goto out;
- fs_devices->seed = root->fs_info->fs_devices->seed;
- root->fs_info->fs_devices->seed = fs_devices;
+ fs_devices->seed = fs_info->fs_devices->seed;
+ fs_info->fs_devices->seed = fs_devices;
out:
return ret;
}
-static int read_one_dev(struct btrfs_root *root,
+static int read_one_dev(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
struct btrfs_dev_item *dev_item)
{
(unsigned long)btrfs_device_fsid(dev_item),
BTRFS_UUID_SIZE);
- if (memcmp(fs_uuid, root->fs_info->fsid, BTRFS_UUID_SIZE)) {
- ret = open_seed_devices(root, fs_uuid);
+ if (memcmp(fs_uuid, fs_info->fsid, BTRFS_UUID_SIZE)) {
+ ret = open_seed_devices(fs_info, fs_uuid);
if (ret)
return ret;
}
- device = btrfs_find_device(root, devid, dev_uuid, fs_uuid);
+ device = btrfs_find_device(fs_info, devid, dev_uuid, fs_uuid);
if (!device) {
device = kzalloc(sizeof(*device), GFP_NOFS);
if (!device)
return -ENOMEM;
device->fd = -1;
list_add(&device->dev_list,
- &root->fs_info->fs_devices->devices);
+ &fs_info->fs_devices->devices);
}
fill_device_from_item(leaf, dev_item, device);
- device->dev_root = root->fs_info->dev_root;
+ device->dev_root = fs_info->dev_root;
return ret;
}
-int btrfs_read_sys_array(struct btrfs_root *root)
+int btrfs_read_sys_array(struct btrfs_fs_info *fs_info)
{
- struct btrfs_super_block *super_copy = root->fs_info->super_copy;
+ struct btrfs_super_block *super_copy = fs_info->super_copy;
struct extent_buffer *sb;
struct btrfs_disk_key *disk_key;
struct btrfs_chunk *chunk;
u32 cur_offset;
struct btrfs_key key;
- sb = btrfs_find_create_tree_block(root->fs_info,
- BTRFS_SUPER_INFO_OFFSET,
- BTRFS_SUPER_INFO_SIZE);
+ if (fs_info->nodesize < BTRFS_SUPER_INFO_SIZE) {
+ printf("ERROR: nodesize %u too small to read superblock\n",
+ fs_info->nodesize);
+ return -EINVAL;
+ }
+ sb = btrfs_find_create_tree_block(fs_info, BTRFS_SUPER_INFO_OFFSET);
if (!sb)
return -ENOMEM;
btrfs_set_buffer_uptodate(sb);
if (cur_offset + len > array_size)
goto out_short_read;
- ret = read_one_chunk(root, &key, sb, chunk, -1);
+ ret = read_one_chunk(fs_info, &key, sb, chunk, -1);
if (ret)
break;
} else {
return -EIO;
}
-int btrfs_read_chunk_tree(struct btrfs_root *root)
+int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info)
{
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_key key;
struct btrfs_key found_key;
+ struct btrfs_root *root = fs_info->chunk_root;
int ret;
int slot;
- root = root->fs_info->chunk_root;
-
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
struct btrfs_dev_item *dev_item;
dev_item = btrfs_item_ptr(leaf, slot,
struct btrfs_dev_item);
- ret = read_one_dev(root, leaf, dev_item);
+ ret = read_one_dev(fs_info, leaf, dev_item);
BUG_ON(ret);
} else if (found_key.type == BTRFS_CHUNK_ITEM_KEY) {
struct btrfs_chunk *chunk;
chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
- ret = read_one_chunk(root, &found_key, leaf, chunk,
+ ret = read_one_chunk(fs_info, &found_key, leaf, chunk,
slot);
BUG_ON(ret);
}
return ret;
}
+
+/*
+ * Get stripe length from chunk item and its stripe items
+ *
+ * Caller should only call this function after validating the chunk item
+ * by using btrfs_check_chunk_valid().
+ */
+u64 btrfs_stripe_length(struct btrfs_fs_info *fs_info,
+ struct extent_buffer *leaf,
+ struct btrfs_chunk *chunk)
+{
+ u64 stripe_len;
+ u64 chunk_len;
+ u32 num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
+ u64 profile = btrfs_chunk_type(leaf, chunk) &
+ BTRFS_BLOCK_GROUP_PROFILE_MASK;
+
+ chunk_len = btrfs_chunk_length(leaf, chunk);
+
+ switch (profile) {
+ case 0: /* Single profile */
+ case BTRFS_BLOCK_GROUP_RAID1:
+ case BTRFS_BLOCK_GROUP_DUP:
+ stripe_len = chunk_len;
+ break;
+ case BTRFS_BLOCK_GROUP_RAID0:
+ stripe_len = chunk_len / num_stripes;
+ break;
+ case BTRFS_BLOCK_GROUP_RAID5:
+ stripe_len = chunk_len / (num_stripes - 1);
+ break;
+ case BTRFS_BLOCK_GROUP_RAID6:
+ stripe_len = chunk_len / (num_stripes - 2);
+ break;
+ case BTRFS_BLOCK_GROUP_RAID10:
+ stripe_len = chunk_len / (num_stripes /
+ btrfs_chunk_sub_stripes(leaf, chunk));
+ break;
+ default:
+ /* Invalid chunk profile found */
+ BUG_ON(1);
+ }
+ return stripe_len;
+}
projects / platform / upstream / btrfs-progs.git / blobdiff