X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=volumes.c;h=9ebe52a4d547f01631a4d309d4c1eca8dc3d1947;hb=c41c5b1562c5a628f164a1d3d3d19a9c1f728bdf;hp=d87fd70e62ea7d53bce2813cab3dd10a1e95344d;hpb=a2203246ae483d09114329d5d1f898efb23d6168;p=platform%2Fupstream%2Fbtrfs-progs.git diff --git a/volumes.c b/volumes.c index d87fd70..9ebe52a 100644 --- a/volumes.c +++ b/volumes.c @@ -28,6 +28,73 @@ #include "print-tree.h" #include "volumes.h" #include "utils.h" +#include "kernel-lib/raid56.h" + +const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = { + [BTRFS_RAID_RAID10] = { + .sub_stripes = 2, + .dev_stripes = 1, + .devs_max = 0, /* 0 == as many as possible */ + .devs_min = 4, + .tolerated_failures = 1, + .devs_increment = 2, + .ncopies = 2, + }, + [BTRFS_RAID_RAID1] = { + .sub_stripes = 1, + .dev_stripes = 1, + .devs_max = 2, + .devs_min = 2, + .tolerated_failures = 1, + .devs_increment = 2, + .ncopies = 2, + }, + [BTRFS_RAID_DUP] = { + .sub_stripes = 1, + .dev_stripes = 2, + .devs_max = 1, + .devs_min = 1, + .tolerated_failures = 0, + .devs_increment = 1, + .ncopies = 2, + }, + [BTRFS_RAID_RAID0] = { + .sub_stripes = 1, + .dev_stripes = 1, + .devs_max = 0, + .devs_min = 2, + .tolerated_failures = 0, + .devs_increment = 1, + .ncopies = 1, + }, + [BTRFS_RAID_SINGLE] = { + .sub_stripes = 1, + .dev_stripes = 1, + .devs_max = 1, + .devs_min = 1, + .tolerated_failures = 0, + .devs_increment = 1, + .ncopies = 1, + }, + [BTRFS_RAID_RAID5] = { + .sub_stripes = 1, + .dev_stripes = 1, + .devs_max = 0, + .devs_min = 2, + .tolerated_failures = 1, + .devs_increment = 1, + .ncopies = 2, + }, + [BTRFS_RAID_RAID6] = { + .sub_stripes = 1, + .dev_stripes = 1, + .devs_max = 0, + .devs_min = 3, + .tolerated_failures = 2, + .devs_increment = 1, + .ncopies = 3, + }, +}; struct stripe { struct btrfs_device *dev; @@ -57,10 +124,8 @@ static struct btrfs_device *__find_device(struct list_head *head, u64 devid, u8 *uuid) { struct btrfs_device *dev; - struct list_head *cur; - list_for_each(cur, head) { - dev = list_entry(cur, struct btrfs_device, dev_list); + list_for_each_entry(dev, head, dev_list) { if (dev->devid == devid && !memcmp(dev->uuid, uuid, BTRFS_UUID_SIZE)) { return dev; @@ -71,11 +136,9 @@ static struct btrfs_device *__find_device(struct list_head *head, u64 devid, static struct btrfs_fs_devices *find_fsid(u8 *fsid) { - struct list_head *cur; struct btrfs_fs_devices *fs_devices; - list_for_each(cur, &fs_uuids) { - fs_devices = list_entry(cur, struct btrfs_fs_devices, list); + list_for_each_entry(fs_devices, &fs_uuids, list) { if (memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE) == 0) return fs_devices; } @@ -137,7 +200,21 @@ static int device_list_add(const char *path, 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); @@ -160,6 +237,7 @@ int btrfs_close_devices(struct btrfs_fs_devices *fs_devices) { struct btrfs_fs_devices *seed_devices; struct btrfs_device *device; + int ret = 0; again: if (!fs_devices) @@ -168,7 +246,11 @@ again: 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: %m", + device->devid); + ret = -errno; + } if (posix_fadvise(device->fd, 0, 0, POSIX_FADV_DONTNEED)) fprintf(stderr, "Warning, could not drop caches\n"); close(device->fd); @@ -197,7 +279,7 @@ again: free(fs_devices); } - return 0; + return ret; } void btrfs_close_all_devices(void) @@ -214,13 +296,10 @@ void btrfs_close_all_devices(void) int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int flags) { int fd; - struct list_head *head = &fs_devices->devices; - struct list_head *cur; struct btrfs_device *device; int ret; - list_for_each(cur, head) { - device = list_entry(cur, struct btrfs_device, dev_list); + list_for_each_entry(device, &fs_devices->devices, dev_list) { if (!device->name) { printk("no name for device %llu, skip it now\n", device->devid); continue; @@ -229,8 +308,7 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int flags) fd = open(device->name, flags); if (fd < 0) { ret = -errno; - error("cannot open device '%s': %s", device->name, - strerror(errno)); + error("cannot open device '%s': %m", device->name); goto fail; } @@ -296,9 +374,9 @@ int btrfs_scan_one_device(int fd, const char *path, * But if we don't find suitable free space, it is used to store the size of * the max free space. */ -static int find_free_dev_extent_start(struct btrfs_trans_handle *trans, - struct btrfs_device *device, u64 num_bytes, - u64 search_start, u64 *start, u64 *len) +static int find_free_dev_extent_start(struct btrfs_device *device, + u64 num_bytes, u64 search_start, + u64 *start, u64 *len) { struct btrfs_key key; struct btrfs_root *root = device->dev_root; @@ -437,20 +515,17 @@ out: return ret; } -int find_free_dev_extent(struct btrfs_trans_handle *trans, - struct btrfs_device *device, u64 num_bytes, - u64 *start) +static int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes, + u64 *start, u64 *len) { /* FIXME use last free of some kind */ - return find_free_dev_extent_start(trans, device, - num_bytes, 0, start, NULL); + return find_free_dev_extent_start(device, num_bytes, 0, start, len); } static int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, struct btrfs_device *device, - u64 chunk_tree, u64 chunk_objectid, - u64 chunk_offset, - u64 num_bytes, u64 *start, int convert) + u64 chunk_offset, u64 num_bytes, u64 *start, + int convert) { int ret; struct btrfs_path *path; @@ -468,8 +543,7 @@ static int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, * is responsible to make sure it's free. */ if (!convert) { - ret = find_free_dev_extent(trans, device, num_bytes, - start); + ret = find_free_dev_extent(device, num_bytes, start, NULL); if (ret) goto err; } @@ -484,8 +558,9 @@ static int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, leaf = path->nodes[0]; extent = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dev_extent); - btrfs_set_dev_extent_chunk_tree(leaf, extent, chunk_tree); - btrfs_set_dev_extent_chunk_objectid(leaf, extent, chunk_objectid); + btrfs_set_dev_extent_chunk_tree(leaf, extent, BTRFS_CHUNK_TREE_OBJECTID); + btrfs_set_dev_extent_chunk_objectid(leaf, extent, + BTRFS_FIRST_CHUNK_TREE_OBJECTID); btrfs_set_dev_extent_chunk_offset(leaf, extent, chunk_offset); write_extent_buffer(leaf, root->fs_info->chunk_tree_uuid, @@ -499,8 +574,9 @@ err: 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; @@ -511,7 +587,7 @@ static int find_next_chunk(struct btrfs_root *root, u64 objectid, u64 *offset) if (!path) return -ENOMEM; - key.objectid = objectid; + key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID; key.offset = (u64)-1; key.type = BTRFS_CHUNK_ITEM_KEY; @@ -527,7 +603,7 @@ static int find_next_chunk(struct btrfs_root *root, u64 objectid, u64 *offset) } 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], @@ -579,7 +655,7 @@ error: * 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; @@ -587,11 +663,10 @@ int btrfs_add_device(struct btrfs_trans_handle *trans, 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; @@ -629,7 +704,7 @@ int btrfs_add_device(struct btrfs_trans_handle *trans, 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; @@ -684,12 +759,10 @@ out: 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; @@ -819,7 +892,7 @@ error: return ret; } -#define BTRFS_MAX_DEVS(r) ((BTRFS_LEAF_DATA_SIZE(r) \ +#define BTRFS_MAX_DEVS(info) ((BTRFS_LEAF_DATA_SIZE(info) \ - sizeof(struct btrfs_item) \ - sizeof(struct btrfs_chunk)) \ / sizeof(struct btrfs_stripe) + 1) @@ -830,11 +903,11 @@ error: / 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; @@ -865,10 +938,7 @@ int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, 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 = SZ_8M; max_chunk_size = calc_size * 2; @@ -878,12 +948,12 @@ int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, calc_size = SZ_1G; max_chunk_size = 10 * calc_size; min_stripe_size = SZ_64M; - max_stripes = BTRFS_MAX_DEVS(chunk_root); + max_stripes = BTRFS_MAX_DEVS(info); } else if (type & BTRFS_BLOCK_GROUP_METADATA) { calc_size = SZ_1G; max_chunk_size = 4 * calc_size; min_stripe_size = SZ_32M; - max_stripes = BTRFS_MAX_DEVS(chunk_root); + max_stripes = BTRFS_MAX_DEVS(info); } } if (type & BTRFS_BLOCK_GROUP_RAID1) { @@ -995,8 +1065,7 @@ again: } 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; @@ -1028,15 +1097,15 @@ again: (index == num_stripes - 1)) list_move_tail(&device->dev_list, dev_list); - ret = btrfs_alloc_dev_extent(trans, device, - info->chunk_root->root_key.objectid, - BTRFS_FIRST_CHUNK_TREE_OBJECTID, key.offset, + ret = btrfs_alloc_dev_extent(trans, device, key.offset, calc_size, &dev_offset, 0); - BUG_ON(ret); + if (ret < 0) + goto out_chunk_map; device->bytes_used += calc_size; ret = btrfs_update_device(trans, device); - BUG_ON(ret); + if (ret < 0) + goto out_chunk_map; map->stripes[index].dev = device; map->stripes[index].physical = dev_offset; @@ -1056,9 +1125,9 @@ again: 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; @@ -1075,16 +1144,24 @@ again: map->ce.size = *num_bytes; ret = insert_cache_extent(&info->mapping_tree.cache_tree, &map->ce); - BUG_ON(ret); + if (ret < 0) + goto out_chunk_map; 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); + if (ret < 0) + goto out_chunk; } kfree(chunk); return ret; + +out_chunk_map: + kfree(map); +out_chunk: + kfree(chunk); + return ret; } /* @@ -1096,11 +1173,11 @@ again: * 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; @@ -1119,7 +1196,7 @@ int btrfs_alloc_data_chunk(struct btrfs_trans_handle *trans, 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; @@ -1129,9 +1206,7 @@ int btrfs_alloc_data_chunk(struct btrfs_trans_handle *trans, } 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; @@ -1157,9 +1232,7 @@ int btrfs_alloc_data_chunk(struct btrfs_trans_handle *trans, while (index < num_stripes) { struct btrfs_stripe *stripe; - ret = btrfs_alloc_dev_extent(trans, device, - info->chunk_root->root_key.objectid, - BTRFS_FIRST_CHUNK_TREE_OBJECTID, key.offset, + ret = btrfs_alloc_dev_extent(trans, device, key.offset, calc_size, &dev_offset, convert); BUG_ON(ret); @@ -1184,9 +1257,9 @@ int btrfs_alloc_data_chunk(struct btrfs_trans_handle *trans, 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; @@ -1210,8 +1283,9 @@ int btrfs_alloc_data_chunk(struct btrfs_trans_handle *trans, 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; @@ -1246,9 +1320,10 @@ int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len) 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; @@ -1274,15 +1349,18 @@ int btrfs_next_bg(struct btrfs_mapping_tree *map_tree, u64 *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; @@ -1374,20 +1452,21 @@ static void sort_parity_stripes(struct btrfs_multi_bio *bbio, u64 *raid_map) } } -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; @@ -1592,17 +1671,17 @@ out: 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) @@ -1628,11 +1707,11 @@ btrfs_find_device_by_devid(struct btrfs_fs_devices *fs_devices, 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; @@ -1641,7 +1720,7 @@ int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset) * 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; @@ -1671,7 +1750,7 @@ static struct btrfs_device *fill_missing_device(u64 devid) * 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) @@ -1681,6 +1760,8 @@ int btrfs_check_chunk_valid(struct btrfs_root *root, 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); @@ -1691,16 +1772,16 @@ int btrfs_check_chunk_valid(struct btrfs_root *root, /* * 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) { - error("invalid chunk sectorsize %llu", + 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; } @@ -1720,23 +1801,38 @@ int btrfs_check_chunk_valid(struct btrfs_root *root, 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) || @@ -1757,11 +1853,11 @@ int btrfs_check_chunk_valid(struct btrfs_root *root, * * 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; @@ -1776,7 +1872,7 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key, 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", @@ -1812,14 +1908,14 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key, 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); } } @@ -1849,12 +1945,12 @@ static int fill_device_from_item(struct extent_buffer *leaf, 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; @@ -1880,13 +1976,13 @@ static int open_seed_devices(struct btrfs_root *root, u8 *fsid) 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) { @@ -1904,30 +2000,30 @@ static int read_one_dev(struct btrfs_root *root, (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; @@ -1940,9 +2036,12 @@ int btrfs_read_sys_array(struct btrfs_root *root) 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); @@ -1988,7 +2087,7 @@ int btrfs_read_sys_array(struct btrfs_root *root) 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 { @@ -2012,17 +2111,16 @@ out_short_read: 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; @@ -2055,12 +2153,12 @@ int btrfs_read_chunk_tree(struct btrfs_root *root) 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); } @@ -2265,3 +2363,225 @@ out: 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; +} + +/* + * Return 0 if size of @device is already good + * Return >0 if size of @device is not aligned but fixed without problems + * Return <0 if something wrong happened when aligning the size of @device + */ +int btrfs_fix_device_size(struct btrfs_fs_info *fs_info, + struct btrfs_device *device) +{ + struct btrfs_trans_handle *trans; + struct btrfs_key key; + struct btrfs_path path; + struct btrfs_root *chunk_root = fs_info->chunk_root; + struct btrfs_dev_item *di; + u64 old_bytes = device->total_bytes; + int ret; + + if (IS_ALIGNED(old_bytes, fs_info->sectorsize)) + return 0; + + /* Align the in-memory total_bytes first, and use it as correct size */ + device->total_bytes = round_down(device->total_bytes, + fs_info->sectorsize); + + key.objectid = BTRFS_DEV_ITEMS_OBJECTID; + key.type = BTRFS_DEV_ITEM_KEY; + key.offset = device->devid; + + trans = btrfs_start_transaction(chunk_root, 1); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + error("error starting transaction: %d (%s)", + ret, strerror(-ret)); + return ret; + } + + btrfs_init_path(&path); + ret = btrfs_search_slot(trans, chunk_root, &key, &path, 0, 1); + if (ret > 0) { + error("failed to find DEV_ITEM for devid %llu", device->devid); + ret = -ENOENT; + goto err; + } + if (ret < 0) { + error("failed to search chunk root: %d (%s)", + ret, strerror(-ret)); + goto err; + } + di = btrfs_item_ptr(path.nodes[0], path.slots[0], struct btrfs_dev_item); + btrfs_set_device_total_bytes(path.nodes[0], di, device->total_bytes); + btrfs_mark_buffer_dirty(path.nodes[0]); + ret = btrfs_commit_transaction(trans, chunk_root); + if (ret < 0) { + error("failed to commit current transaction: %d (%s)", + ret, strerror(-ret)); + btrfs_release_path(&path); + return ret; + } + btrfs_release_path(&path); + printf("Fixed device size for devid %llu, old size: %llu new size: %llu\n", + device->devid, old_bytes, device->total_bytes); + return 1; + +err: + /* We haven't modified anything, it's OK to commit current trans */ + btrfs_commit_transaction(trans, chunk_root); + btrfs_release_path(&path); + return ret; +} + +/* + * Return 0 if super block total_bytes matches all devices' total_bytes + * Return >0 if super block total_bytes mismatch but fixed without problem + * Return <0 if we failed to fix super block total_bytes + */ +int btrfs_fix_super_size(struct btrfs_fs_info *fs_info) +{ + struct btrfs_trans_handle *trans; + struct btrfs_device *device; + struct list_head *dev_list = &fs_info->fs_devices->devices; + u64 total_bytes = 0; + u64 old_bytes = btrfs_super_total_bytes(fs_info->super_copy); + int ret; + + list_for_each_entry(device, dev_list, dev_list) { + /* + * Caller should ensure this function is called after aligning + * all devices' total_bytes. + */ + if (!IS_ALIGNED(device->total_bytes, fs_info->sectorsize)) { + error("device %llu total_bytes %llu not aligned to %u", + device->devid, device->total_bytes, + fs_info->sectorsize); + return -EUCLEAN; + } + total_bytes += device->total_bytes; + } + + if (total_bytes == old_bytes) + return 0; + + btrfs_set_super_total_bytes(fs_info->super_copy, total_bytes); + + /* Commit transaction to update all super blocks */ + trans = btrfs_start_transaction(fs_info->tree_root, 1); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + error("error starting transaction: %d (%s)", + ret, strerror(-ret)); + return ret; + } + ret = btrfs_commit_transaction(trans, fs_info->tree_root); + if (ret < 0) { + error("failed to commit current transaction: %d (%s)", + ret, strerror(-ret)); + return ret; + } + printf("Fixed super total bytes, old size: %llu new size: %llu\n", + old_bytes, total_bytes); + return 1; +} + +/* + * Return 0 if all devices and super block sizes are good + * Return >0 if any device/super size problem was found, but fixed + * Return <0 if something wrong happened during fixing + */ +int btrfs_fix_device_and_super_size(struct btrfs_fs_info *fs_info) +{ + struct btrfs_device *device; + struct list_head *dev_list = &fs_info->fs_devices->devices; + bool have_bad_value = false; + int ret; + + /* Seed device is not supported yet */ + if (fs_info->fs_devices->seed) { + error("fixing device size with seed device is not supported yet"); + return -EOPNOTSUPP; + } + + /* All devices must be set up before repairing */ + if (list_empty(dev_list)) { + error("no device found"); + return -ENODEV; + } + list_for_each_entry(device, dev_list, dev_list) { + if (device->fd == -1 || !device->writeable) { + error("devid %llu is missing or not writeable", + device->devid); + error( + "fixing device size needs all device(s) to be present and writeable"); + return -ENODEV; + } + } + + /* Repair total_bytes of each device */ + list_for_each_entry(device, dev_list, dev_list) { + ret = btrfs_fix_device_size(fs_info, device); + if (ret < 0) + return ret; + if (ret > 0) + have_bad_value = true; + } + + /* Repair super total_byte */ + ret = btrfs_fix_super_size(fs_info); + if (ret > 0) + have_bad_value = true; + if (have_bad_value) { + printf( + "Fixed unaligned/mismatched total_bytes for super block and device items\n"); + ret = 1; + } else { + printf("No device size related problem found\n"); + ret = 0; + } + return ret; +}