#define COMPRESS_NONE 0
#define COMPRESS_ZLIB 1
+#define MAX_WORKER_THREADS (32)
+
struct meta_cluster_item {
__le64 bytenr;
__le32 size;
struct fs_chunk {
u64 logical;
u64 physical;
+ /*
+ * physical_dup only store additonal physical for BTRFS_BLOCK_GROUP_DUP
+ * currently restore only support single and DUP
+ * TODO: modify this structure and the function related to this
+ * structure for support RAID*
+ */
+ u64 physical_dup;
u64 bytes;
struct rb_node l;
struct rb_node p;
struct btrfs_root *root;
FILE *out;
- struct meta_cluster *cluster;
+ union {
+ struct meta_cluster cluster;
+ char meta_cluster_bytes[BLOCK_SIZE];
+ };
- pthread_t *threads;
+ pthread_t threads[MAX_WORKER_THREADS];
size_t num_threads;
pthread_mutex_t mutex;
pthread_cond_t cond;
FILE *in;
FILE *out;
- pthread_t *threads;
+ pthread_t threads[MAX_WORKER_THREADS];
size_t num_threads;
pthread_mutex_t mutex;
pthread_cond_t cond;
struct list_head list;
struct list_head overlapping_chunks;
size_t num_items;
- u32 leafsize;
+ u32 nodesize;
u64 devid;
u64 alloced_chunks;
u64 last_physical_offset;
static void csum_block(u8 *buf, size_t len)
{
- char result[BTRFS_CRC32_SIZE];
+ u8 result[BTRFS_CRC32_SIZE];
u32 crc = ~(u32)0;
crc = crc32c(crc, buf + BTRFS_CSUM_SIZE, len - BTRFS_CSUM_SIZE);
btrfs_csum_final(crc, result);
return NULL;
for (i = 0; i < name_len; i++) {
- char c = rand() % 94 + 33;
+ char c = rand_range(94) + 33;
if (c == '/')
c++;
return NULL;
}
-static u64 logical_to_physical(struct mdrestore_struct *mdres, u64 logical, u64 *size)
+static u64 logical_to_physical(struct mdrestore_struct *mdres, u64 logical,
+ u64 *size, u64 *physical_dup)
{
struct fs_chunk *fs_chunk;
struct rb_node *entry;
entry = tree_search(&mdres->chunk_tree, &search.l, chunk_cmp, 1);
if (!entry) {
if (mdres->in != stdin)
- printf("Couldn't find a chunk, using logical\n");
+ warning("cannot find a chunk, using logical");
return logical;
}
fs_chunk = rb_entry(entry, struct fs_chunk, l);
BUG();
offset = search.logical - fs_chunk->logical;
+ if (physical_dup) {
+ /* Only in dup case, physical_dup is not equal to 0 */
+ if (fs_chunk->physical_dup)
+ *physical_dup = fs_chunk->physical_dup + offset;
+ else
+ *physical_dup = 0;
+ }
+
*size = min(*size, fs_chunk->bytes + fs_chunk->logical - logical);
return fs_chunk->physical + offset;
}
val = malloc(sizeof(struct name));
if (!val) {
- fprintf(stderr, "Couldn't sanitize name, enomem\n");
+ error("cannot sanitize name, not enough memory");
free(name);
return NULL;
}
val->len = name_len;
val->sub = malloc(name_len);
if (!val->sub) {
- fprintf(stderr, "Couldn't sanitize name, enomem\n");
+ error("cannot sanitize name, not enough memory");
free(val);
free(name);
return NULL;
}
if (!found) {
- fprintf(stderr, "Couldn't find a collision for '%.*s', "
- "generating normal garbage, it won't match indexes\n",
+ warning(
+"cannot find a hash collision for '%.*s', generating garbage, it won't match indexes",
val->len, val->val);
for (i = 0; i < name_len; i++) {
- char c = rand() % 94 + 33;
+ char c = rand_range(94) + 33;
if (c == '/')
c++;
if (md->sanitize_names > 1) {
buf = malloc(name_len);
if (!buf) {
- fprintf(stderr, "Couldn't sanitize name, "
- "enomem\n");
+ error("cannot sanitize name, not enough memory");
return;
}
read_extent_buffer(eb, buf, name_ptr, name_len);
garbage = generate_garbage(name_len);
}
if (!garbage) {
- fprintf(stderr, "Couldn't sanitize name, enomem\n");
+ error("cannot sanitize name, not enough memory");
return;
}
write_extent_buffer(eb, garbage, name_ptr, name_len);
if (md->sanitize_names > 1) {
buf = malloc(len);
if (!buf) {
- fprintf(stderr, "Couldn't sanitize name, "
- "enomem\n");
+ error("cannot sanitize name, not enough memory");
return;
}
read_extent_buffer(eb, buf, name_ptr, len);
}
if (!garbage) {
- fprintf(stderr, "Couldn't sanitize name, enomem\n");
+ error("cannot sanitize name, not enough memory");
return;
}
write_extent_buffer(eb, garbage, name_ptr, len);
eb = alloc_dummy_eb(src->start, src->len);
if (!eb) {
- fprintf(stderr, "Couldn't sanitize name, no memory\n");
+ error("cannot sanitize name, not enough memory");
return;
}
async->bufsize = compressBound(async->size);
async->buffer = malloc(async->bufsize);
if (!async->buffer) {
- fprintf(stderr, "Error allocing buffer\n");
+ error("not enough memory for async buffer");
pthread_mutex_lock(&md->mutex);
if (!md->error)
md->error = -ENOMEM;
md->num_items = 0;
md->num_ready = 0;
- header = &md->cluster->header;
+ header = &md->cluster.header;
header->magic = cpu_to_le64(HEADER_MAGIC);
header->bytenr = cpu_to_le64(start);
header->nritems = cpu_to_le32(0);
free(name->sub);
free(name);
}
- free(md->threads);
- free(md->cluster);
}
static int metadump_init(struct metadump_struct *md, struct btrfs_root *root,
int i, ret = 0;
memset(md, 0, sizeof(*md));
- pthread_cond_init(&md->cond, NULL);
- pthread_mutex_init(&md->mutex, NULL);
INIT_LIST_HEAD(&md->list);
INIT_LIST_HEAD(&md->ordered);
md->root = root;
md->out = out;
md->pending_start = (u64)-1;
md->compress_level = compress_level;
- md->cluster = calloc(1, BLOCK_SIZE);
md->sanitize_names = sanitize_names;
if (sanitize_names > 1)
crc32c_optimization_init();
- if (!md->cluster) {
- pthread_cond_destroy(&md->cond);
- pthread_mutex_destroy(&md->mutex);
- return -ENOMEM;
- }
-
+ md->name_tree.rb_node = NULL;
+ md->num_threads = num_threads;
+ pthread_cond_init(&md->cond, NULL);
+ pthread_mutex_init(&md->mutex, NULL);
meta_cluster_init(md, 0);
+
if (!num_threads)
return 0;
- md->name_tree.rb_node = NULL;
- md->num_threads = num_threads;
- md->threads = calloc(num_threads, sizeof(pthread_t));
- if (!md->threads) {
- free(md->cluster);
- pthread_cond_destroy(&md->cond);
- pthread_mutex_destroy(&md->mutex);
- return -ENOMEM;
- }
-
for (i = 0; i < num_threads; i++) {
ret = pthread_create(md->threads + i, NULL, dump_worker, md);
if (ret)
static int write_buffers(struct metadump_struct *md, u64 *next)
{
- struct meta_cluster_header *header = &md->cluster->header;
+ struct meta_cluster_header *header = &md->cluster.header;
struct meta_cluster_item *item;
struct async_work *async;
u64 bytenr = 0;
}
if (err) {
- fprintf(stderr, "One of the threads errored out %s\n",
- strerror(err));
+ error("one of the threads failed: %s", strerror(-err));
goto out;
}
/* setup and write index block */
list_for_each_entry(async, &md->ordered, ordered) {
- item = md->cluster->items + nritems;
+ item = &md->cluster.items[nritems];
item->bytenr = cpu_to_le64(async->start);
item->size = cpu_to_le32(async->bufsize);
nritems++;
}
header->nritems = cpu_to_le32(nritems);
- ret = fwrite(md->cluster, BLOCK_SIZE, 1, md->out);
+ ret = fwrite(&md->cluster, BLOCK_SIZE, 1, md->out);
if (ret != 1) {
- fprintf(stderr, "Error writing out cluster: %d\n", errno);
- return -EIO;
+ error("unable to write out cluster: %s", strerror(errno));
+ return -errno;
}
/* write buffers */
ret = fwrite(async->buffer, async->bufsize, 1,
md->out);
if (ret != 1) {
- err = -EIO;
+ error("unable to write out cluster: %s",
+ strerror(errno));
+ err = -errno;
ret = 0;
- fprintf(stderr, "Error writing out cluster: %d\n",
- errno);
}
free(async->buffer);
bytenr += size;
ret = write_zero(md->out, size);
if (ret != 1) {
- fprintf(stderr, "Error zeroing out buffer: %d\n",
- errno);
- err = -EIO;
+ error("unable to zero out buffer: %s",
+ strerror(errno));
+ err = -errno;
}
}
out:
static int read_data_extent(struct metadump_struct *md,
struct async_work *async)
{
- struct btrfs_multi_bio *multi = NULL;
- struct btrfs_device *device;
+ struct btrfs_root *root = md->root;
u64 bytes_left = async->size;
u64 logical = async->start;
u64 offset = 0;
- u64 bytenr;
u64 read_len;
- ssize_t done;
- int fd;
+ int num_copies;
+ int cur_mirror;
int ret;
- while (bytes_left) {
- read_len = bytes_left;
- ret = btrfs_map_block(&md->root->fs_info->mapping_tree, READ,
- logical, &read_len, &multi, 0, NULL);
- if (ret) {
- fprintf(stderr, "Couldn't map data block %d\n", ret);
- return ret;
- }
+ num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, logical,
+ bytes_left);
- device = multi->stripes[0].dev;
-
- if (device->fd == 0) {
- fprintf(stderr,
- "Device we need to read from is not open\n");
- free(multi);
- return -EIO;
- }
- fd = device->fd;
- bytenr = multi->stripes[0].physical;
- free(multi);
-
- read_len = min(read_len, bytes_left);
- done = pread64(fd, async->buffer+offset, read_len, bytenr);
- if (done < read_len) {
- if (done < 0)
- fprintf(stderr, "Error reading extent %d\n",
- errno);
- else
- fprintf(stderr, "Short read\n");
- return -EIO;
+ /* Try our best to read data, just like read_tree_block() */
+ for (cur_mirror = 0; cur_mirror < num_copies; cur_mirror++) {
+ while (bytes_left) {
+ read_len = bytes_left;
+ ret = read_extent_data(root,
+ (char *)(async->buffer + offset),
+ logical, &read_len, cur_mirror);
+ if (ret < 0)
+ break;
+ offset += read_len;
+ logical += read_len;
+ bytes_left -= read_len;
}
-
- bytes_left -= done;
- offset += done;
- logical += done;
}
-
+ if (bytes_left)
+ return -EIO;
return 0;
}
struct async_work *async = NULL;
struct extent_buffer *eb;
u64 blocksize = md->root->nodesize;
- u64 start;
+ u64 start = 0;
u64 size;
size_t offset;
int ret = 0;
if (ret < size) {
free(async->buffer);
free(async);
- fprintf(stderr, "Error reading superblock\n");
- return -EIO;
+ error("unable to read superblock at %llu: %s",
+ (unsigned long long)start,
+ strerror(errno));
+ return -errno;
}
size = 0;
ret = 0;
if (!extent_buffer_uptodate(eb)) {
free(async->buffer);
free(async);
- fprintf(stderr,
- "Error reading metadata block\n");
+ error("unable to read metadata block %llu",
+ (unsigned long long)start);
return -EIO;
}
copy_buffer(md, async->buffer + offset, eb);
if (md->num_items >= ITEMS_PER_CLUSTER || done) {
ret = write_buffers(md, &start);
if (ret)
- fprintf(stderr, "Error writing buffers %d\n",
- errno);
+ error("unable to write buffers: %s", strerror(-ret));
else
meta_cluster_init(md, start);
}
int i = 0;
int ret;
- ret = add_extent(btrfs_header_bytenr(eb), root->leafsize, metadump, 0);
+ ret = add_extent(btrfs_header_bytenr(eb), root->nodesize, metadump, 0);
if (ret) {
- fprintf(stderr, "Error adding metadata block\n");
+ error("unable to add metadata block %llu: %d",
+ btrfs_header_bytenr(eb), ret);
return ret;
}
continue;
ri = btrfs_item_ptr(eb, i, struct btrfs_root_item);
bytenr = btrfs_disk_root_bytenr(eb, ri);
- tmp = read_tree_block(root, bytenr, root->leafsize, 0);
+ tmp = read_tree_block(root, bytenr, root->nodesize, 0);
if (!extent_buffer_uptodate(tmp)) {
- fprintf(stderr,
- "Error reading log root block\n");
+ error("unable to read log root block");
return -EIO;
}
ret = copy_tree_blocks(root, tmp, metadump, 0);
return ret;
} else {
bytenr = btrfs_node_blockptr(eb, i);
- tmp = read_tree_block(root, bytenr, root->leafsize, 0);
+ tmp = read_tree_block(root, bytenr, root->nodesize, 0);
if (!extent_buffer_uptodate(tmp)) {
- fprintf(stderr, "Error reading log block\n");
+ error("unable to read log root block");
return -EIO;
}
ret = copy_tree_blocks(root, tmp, metadump, root_tree);
if (!root->fs_info->log_root_tree ||
!root->fs_info->log_root_tree->node) {
- fprintf(stderr, "Error copying tree log, it wasn't setup\n");
+ error("unable to copy tree log, it has not been setup");
return -EIO;
}
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0) {
- fprintf(stderr, "Error searching for free space inode %d\n",
- ret);
+ error("free space inode not found: %d", ret);
return ret;
}
if (path->slots[0] >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(root, path);
if (ret < 0) {
- fprintf(stderr, "Error going to next leaf "
- "%d\n", ret);
+ error("cannot go to next leaf %d", ret);
return ret;
}
if (ret > 0)
num_bytes = btrfs_file_extent_disk_num_bytes(leaf, fi);
ret = add_extent(bytenr, num_bytes, metadump, 1);
if (ret) {
- fprintf(stderr, "Error adding space cache blocks %d\n",
- ret);
+ error("unable to add space cache blocks %d", ret);
btrfs_release_path(path);
return ret;
}
ret = btrfs_search_slot(NULL, extent_root, &key, path, 0, 0);
if (ret < 0) {
- fprintf(stderr, "Error searching extent root %d\n", ret);
+ error("extent root not found: %d", ret);
return ret;
}
ret = 0;
if (path->slots[0] >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(extent_root, path);
if (ret < 0) {
- fprintf(stderr, "Error going to next leaf %d"
- "\n", ret);
+ error("cannot go to next leaf %d", ret);
break;
}
if (ret > 0) {
}
bytenr = key.objectid;
- if (key.type == BTRFS_METADATA_ITEM_KEY)
- num_bytes = extent_root->leafsize;
- else
+ if (key.type == BTRFS_METADATA_ITEM_KEY) {
+ num_bytes = extent_root->nodesize;
+ } else {
num_bytes = key.offset;
+ }
+
+ if (num_bytes == 0) {
+ error("extent length 0 at bytenr %llu key type %d",
+ (unsigned long long)bytenr, key.type);
+ ret = -EIO;
+ break;
+ }
if (btrfs_item_size_nr(leaf, path->slots[0]) > sizeof(*ei)) {
ei = btrfs_item_ptr(leaf, path->slots[0],
ret = add_extent(bytenr, num_bytes, metadump,
0);
if (ret) {
- fprintf(stderr, "Error adding block "
- "%d\n", ret);
+ error("unable to add block %llu: %d",
+ (unsigned long long)bytenr, ret);
break;
}
}
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
ret = is_tree_block(extent_root, path, bytenr);
if (ret < 0) {
- fprintf(stderr, "Error checking tree block "
- "%d\n", ret);
+ error("failed to check tree block %llu: %d",
+ (unsigned long long)bytenr, ret);
break;
}
ret = add_extent(bytenr, num_bytes, metadump,
0);
if (ret) {
- fprintf(stderr, "Error adding block "
- "%d\n", ret);
+ error("unable to add block %llu: %d",
+ (unsigned long long)bytenr, ret);
break;
}
}
ret = 0;
#else
- fprintf(stderr, "Either extent tree corruption or "
- "you haven't built with V0 support\n");
+ error(
+ "either extent tree is corrupted or you haven't built with V0 support");
ret = -EIO;
break;
#endif
int compress_level, int sanitize, int walk_trees)
{
struct btrfs_root *root;
- struct btrfs_path *path = NULL;
+ struct btrfs_path path;
struct metadump_struct metadump;
int ret;
int err = 0;
root = open_ctree(input, 0, 0);
if (!root) {
- fprintf(stderr, "Open ctree failed\n");
+ error("open ctree failed");
return -EIO;
}
- BUG_ON(root->nodesize != root->leafsize);
-
ret = metadump_init(&metadump, root, out, num_threads,
compress_level, sanitize);
if (ret) {
- fprintf(stderr, "Error initing metadump %d\n", ret);
+ error("failed to initialize metadump: %d", ret);
close_ctree(root);
return ret;
}
ret = add_extent(BTRFS_SUPER_INFO_OFFSET, BTRFS_SUPER_INFO_SIZE,
&metadump, 0);
if (ret) {
- fprintf(stderr, "Error adding metadata %d\n", ret);
+ error("unable to add metadata: %d", ret);
err = ret;
goto out;
}
- path = btrfs_alloc_path();
- if (!path) {
- fprintf(stderr, "Out of memory allocing path\n");
- err = -ENOMEM;
- goto out;
- }
+ btrfs_init_path(&path);
if (walk_trees) {
ret = copy_tree_blocks(root, root->fs_info->chunk_root->node,
goto out;
}
} else {
- ret = copy_from_extent_tree(&metadump, path);
+ ret = copy_from_extent_tree(&metadump, &path);
if (ret) {
err = ret;
goto out;
}
}
- ret = copy_log_trees(root, &metadump, path);
+ ret = copy_log_trees(root, &metadump, &path);
if (ret) {
err = ret;
goto out;
}
- ret = copy_space_cache(root, &metadump, path);
+ ret = copy_space_cache(root, &metadump, &path);
out:
ret = flush_pending(&metadump, 1);
if (ret) {
if (!err)
err = ret;
- fprintf(stderr, "Error flushing pending %d\n", ret);
+ error("failed to flush pending data: %d", ret);
}
metadump_destroy(&metadump, num_threads);
- btrfs_free_path(path);
+ btrfs_release_path(&path);
ret = close_ctree(root);
return err ? err : ret;
}
cur += sizeof(*disk_key);
if (key.type == BTRFS_CHUNK_ITEM_KEY) {
- u64 physical, size = 0;
+ u64 type, physical, physical_dup, size = 0;
chunk = (struct btrfs_chunk *)ptr;
old_num_stripes = btrfs_stack_chunk_num_stripes(chunk);
chunk = (struct btrfs_chunk *)write_ptr;
memmove(write_ptr, ptr, sizeof(*chunk));
- btrfs_set_stack_chunk_num_stripes(chunk, 1);
btrfs_set_stack_chunk_sub_stripes(chunk, 0);
- btrfs_set_stack_chunk_type(chunk,
- BTRFS_BLOCK_GROUP_SYSTEM);
- btrfs_set_stack_stripe_devid(&chunk->stripe,
- super->dev_item.devid);
+ type = btrfs_stack_chunk_type(chunk);
+ if (type & BTRFS_BLOCK_GROUP_DUP) {
+ new_array_size += sizeof(struct btrfs_stripe);
+ write_ptr += sizeof(struct btrfs_stripe);
+ } else {
+ btrfs_set_stack_chunk_num_stripes(chunk, 1);
+ btrfs_set_stack_chunk_type(chunk,
+ BTRFS_BLOCK_GROUP_SYSTEM);
+ }
+ chunk->stripe.devid = super->dev_item.devid;
physical = logical_to_physical(mdres, key.offset,
- &size);
+ &size, &physical_dup);
if (size != (u64)-1)
btrfs_set_stack_stripe_offset(&chunk->stripe,
physical);
BTRFS_UUID_SIZE);
new_array_size += sizeof(*chunk);
} else {
- fprintf(stderr, "Bogus key in the sys chunk array "
- "%d\n", key.type);
+ error("bogus key in the sys array %d", key.type);
return -EIO;
}
write_ptr += sizeof(*chunk);
{
struct extent_buffer *eb;
- eb = malloc(sizeof(struct extent_buffer) + size);
+ eb = calloc(1, sizeof(struct extent_buffer) + size);
if (!eb)
return NULL;
- memset(eb, 0, sizeof(struct extent_buffer) + size);
eb->start = bytenr;
eb->len = size;
u64 bytenr = async->start;
int i;
- if (size_left % mdres->leafsize)
+ if (size_left % mdres->nodesize)
return 0;
- eb = alloc_dummy_eb(bytenr, mdres->leafsize);
+ eb = alloc_dummy_eb(bytenr, mdres->nodesize);
if (!eb)
return -ENOMEM;
while (size_left) {
eb->start = bytenr;
- memcpy(eb->data, buffer, mdres->leafsize);
+ memcpy(eb->data, buffer, mdres->nodesize);
if (btrfs_header_bytenr(eb) != bytenr)
break;
goto next;
for (i = 0; i < btrfs_header_nritems(eb); i++) {
- struct btrfs_chunk chunk;
+ struct btrfs_chunk *chunk;
struct btrfs_key key;
- u64 type, physical, size = (u64)-1;
+ u64 type, physical, physical_dup, size = (u64)-1;
btrfs_item_key_to_cpu(eb, &key, i);
if (key.type != BTRFS_CHUNK_ITEM_KEY)
continue;
- truncate_item(eb, i, sizeof(chunk));
- read_extent_buffer(eb, &chunk,
- btrfs_item_ptr_offset(eb, i),
- sizeof(chunk));
size = 0;
physical = logical_to_physical(mdres, key.offset,
- &size);
+ &size, &physical_dup);
+
+ if (!physical_dup)
+ truncate_item(eb, i, sizeof(*chunk));
+ chunk = btrfs_item_ptr(eb, i, struct btrfs_chunk);
+
/* Zero out the RAID profile */
- type = btrfs_stack_chunk_type(&chunk);
+ type = btrfs_chunk_type(eb, chunk);
type &= (BTRFS_BLOCK_GROUP_DATA |
BTRFS_BLOCK_GROUP_SYSTEM |
BTRFS_BLOCK_GROUP_METADATA |
BTRFS_BLOCK_GROUP_DUP);
- btrfs_set_stack_chunk_type(&chunk, type);
+ btrfs_set_chunk_type(eb, chunk, type);
- btrfs_set_stack_chunk_num_stripes(&chunk, 1);
- btrfs_set_stack_chunk_sub_stripes(&chunk, 0);
- btrfs_set_stack_stripe_devid(&chunk.stripe, mdres->devid);
+ if (!physical_dup)
+ btrfs_set_chunk_num_stripes(eb, chunk, 1);
+ btrfs_set_chunk_sub_stripes(eb, chunk, 0);
+ btrfs_set_stripe_devid_nr(eb, chunk, 0, mdres->devid);
if (size != (u64)-1)
- btrfs_set_stack_stripe_offset(&chunk.stripe,
- physical);
- memcpy(chunk.stripe.dev_uuid, mdres->uuid,
- BTRFS_UUID_SIZE);
- write_extent_buffer(eb, &chunk,
- btrfs_item_ptr_offset(eb, i),
- sizeof(chunk));
+ btrfs_set_stripe_offset_nr(eb, chunk, 0,
+ physical);
+ /* update stripe 2 offset */
+ if (physical_dup)
+ btrfs_set_stripe_offset_nr(eb, chunk, 1,
+ physical_dup);
+
+ write_extent_buffer(eb, mdres->uuid,
+ (unsigned long)btrfs_stripe_dev_uuid_nr(
+ chunk, 0),
+ BTRFS_UUID_SIZE);
}
memcpy(buffer, eb->data, eb->len);
csum_block(buffer, eb->len);
next:
- size_left -= mdres->leafsize;
- buffer += mdres->leafsize;
- bytenr += mdres->leafsize;
+ size_left -= mdres->nodesize;
+ buffer += mdres->nodesize;
+ bytenr += mdres->nodesize;
}
free(eb);
int ret;
if (fstat(fd, &st)) {
- fprintf(stderr, "Couldn't stat restore point, won't be able "
- "to write backup supers: %d\n", errno);
+ error(
+ "cannot stat restore point, won't be able to write backup supers: %s",
+ strerror(errno));
return;
}
ret = pwrite64(fd, buf, BTRFS_SUPER_INFO_SIZE, bytenr);
if (ret < BTRFS_SUPER_INFO_SIZE) {
if (ret < 0)
- fprintf(stderr, "Problem writing out backup "
- "super block %d, err %d\n", i, errno);
+ error(
+ "problem writing out backup super block %d: %s",
+ i, strerror(errno));
else
- fprintf(stderr, "Short write writing out "
- "backup super block\n");
+ error("short write writing out backup super block");
break;
}
}
outfd = fileno(mdres->out);
buffer = malloc(compress_size);
if (!buffer) {
- fprintf(stderr, "Error allocing buffer\n");
+ error("not enough memory for restore worker buffer");
pthread_mutex_lock(&mdres->mutex);
if (!mdres->error)
mdres->error = -ENOMEM;
}
while (1) {
- u64 bytenr;
+ u64 bytenr, physical_dup;
off_t offset = 0;
int err = 0;
pthread_mutex_lock(&mdres->mutex);
- while (!mdres->leafsize || list_empty(&mdres->list)) {
+ while (!mdres->nodesize || list_empty(&mdres->list)) {
if (mdres->done) {
pthread_mutex_unlock(&mdres->mutex);
goto out;
ret = uncompress(buffer, (unsigned long *)&size,
async->buffer, async->bufsize);
if (ret != Z_OK) {
- fprintf(stderr, "Error decompressing %d\n",
- ret);
+ error("decompressiion failed with %d", ret);
err = -EIO;
}
outbuf = buffer;
if (!mdres->fixup_offset) {
while (size) {
u64 chunk_size = size;
+ physical_dup = 0;
if (!mdres->multi_devices && !mdres->old_restore)
bytenr = logical_to_physical(mdres,
- async->start + offset,
- &chunk_size);
+ async->start + offset,
+ &chunk_size,
+ &physical_dup);
else
bytenr = async->start + offset;
ret = pwrite64(outfd, outbuf+offset, chunk_size,
bytenr);
- if (ret != chunk_size) {
- if (ret < 0) {
- fprintf(stderr, "Error writing to "
- "device %d\n", errno);
- err = errno;
- break;
- } else {
- fprintf(stderr, "Short write\n");
- err = -EIO;
- break;
- }
- }
+ if (ret != chunk_size)
+ goto error;
+
+ if (physical_dup)
+ ret = pwrite64(outfd, outbuf+offset,
+ chunk_size,
+ physical_dup);
+ if (ret != chunk_size)
+ goto error;
+
size -= chunk_size;
offset += chunk_size;
+ continue;
+
+error:
+ if (ret < 0) {
+ error("unable to write to device: %s",
+ strerror(errno));
+ err = errno;
+ } else {
+ error("short write");
+ err = -EIO;
+ }
}
} else if (async->start != BTRFS_SUPER_INFO_OFFSET) {
ret = write_data_to_disk(mdres->info, outbuf, async->start, size, 0);
if (ret) {
- printk("Error write data\n");
+ error("failed to write data");
exit(1);
}
}
pthread_cond_destroy(&mdres->cond);
pthread_mutex_destroy(&mdres->mutex);
- free(mdres->threads);
}
static int mdrestore_init(struct mdrestore_struct *mdres,
return 0;
mdres->num_threads = num_threads;
- mdres->threads = calloc(num_threads, sizeof(pthread_t));
- if (!mdres->threads)
- return -ENOMEM;
for (i = 0; i < num_threads; i++) {
- ret = pthread_create(mdres->threads + i, NULL, restore_worker,
+ ret = pthread_create(&mdres->threads[i], NULL, restore_worker,
mdres);
- if (ret)
+ if (ret) {
+ /* pthread_create returns errno directly */
+ ret = -ret;
break;
+ }
}
if (ret)
mdrestore_destroy(mdres, i + 1);
int ret;
/* We've already been initialized */
- if (mdres->leafsize)
+ if (mdres->nodesize)
return 0;
if (mdres->compress_method == COMPRESS_ZLIB) {
ret = uncompress(buffer, (unsigned long *)&size,
async->buffer, async->bufsize);
if (ret != Z_OK) {
- fprintf(stderr, "Error decompressing %d\n", ret);
+ error("decompressiion failed with %d", ret);
free(buffer);
return -EIO;
}
}
super = (struct btrfs_super_block *)outbuf;
- mdres->leafsize = btrfs_super_leafsize(super);
+ mdres->nodesize = btrfs_super_nodesize(super);
memcpy(mdres->fsid, super->fsid, BTRFS_FSID_SIZE);
memcpy(mdres->uuid, super->dev_item.uuid,
BTRFS_UUID_SIZE);
item = &cluster->items[i];
async = calloc(1, sizeof(*async));
if (!async) {
- fprintf(stderr, "Error allocating async\n");
+ error("not enough memory for async data");
return -ENOMEM;
}
async->start = le64_to_cpu(item->bytenr);
async->bufsize = le32_to_cpu(item->size);
async->buffer = malloc(async->bufsize);
if (!async->buffer) {
- fprintf(stderr, "Error allocing async buffer\n");
+ error("not enough memory for async buffer");
free(async);
return -ENOMEM;
}
ret = fread(async->buffer, async->bufsize, 1, mdres->in);
if (ret != 1) {
- fprintf(stderr, "Error reading buffer %d\n", errno);
+ error("unable to read buffer: %s", strerror(errno));
free(async->buffer);
free(async);
return -EIO;
if (async->start == BTRFS_SUPER_INFO_OFFSET) {
ret = fill_mdres_info(mdres, async);
if (ret) {
- fprintf(stderr, "Error setting up restore\n");
+ error("unable to set up restore state");
pthread_mutex_unlock(&mdres->mutex);
free(async->buffer);
free(async);
bytenr += size;
ret = fread(buffer, size, 1, mdres->in);
if (ret != 1) {
- fprintf(stderr, "Error reading in buffer %d\n", errno);
+ error("failed to read buffer: %s", strerror(errno));
return -EIO;
}
}
int ret = 0;
int i;
- eb = alloc_dummy_eb(bytenr, mdres->leafsize);
+ eb = alloc_dummy_eb(bytenr, mdres->nodesize);
if (!eb) {
ret = -ENOMEM;
goto out;
}
while (item_bytenr != bytenr) {
- buffer += mdres->leafsize;
- item_bytenr += mdres->leafsize;
+ buffer += mdres->nodesize;
+ item_bytenr += mdres->nodesize;
}
- memcpy(eb->data, buffer, mdres->leafsize);
+ memcpy(eb->data, buffer, mdres->nodesize);
if (btrfs_header_bytenr(eb) != bytenr) {
- fprintf(stderr, "Eb bytenr doesn't match found bytenr\n");
+ error("eb bytenr does not match found bytenr: %llu != %llu",
+ (unsigned long long)btrfs_header_bytenr(eb),
+ (unsigned long long)bytenr);
ret = -EIO;
goto out;
}
if (memcmp(mdres->fsid, eb->data + offsetof(struct btrfs_header, fsid),
BTRFS_FSID_SIZE)) {
- fprintf(stderr, "Fsid doesn't match\n");
+ error("filesystem UUID of eb %llu does not match",
+ (unsigned long long)bytenr);
ret = -EIO;
goto out;
}
if (btrfs_header_owner(eb) != BTRFS_CHUNK_TREE_OBJECTID) {
- fprintf(stderr, "Does not belong to the chunk tree\n");
+ error("wrong eb %llu owner %llu",
+ (unsigned long long)bytenr,
+ (unsigned long long)btrfs_header_owner(eb));
ret = -EIO;
goto out;
}
for (i = 0; i < btrfs_header_nritems(eb); i++) {
- struct btrfs_chunk chunk;
+ struct btrfs_chunk *chunk;
struct fs_chunk *fs_chunk;
struct btrfs_key key;
+ u64 type;
if (btrfs_header_level(eb)) {
u64 blockptr = btrfs_node_blockptr(eb, i);
fs_chunk = malloc(sizeof(struct fs_chunk));
if (!fs_chunk) {
- fprintf(stderr, "Erorr allocating chunk\n");
+ error("not enough memory to allocate chunk");
ret = -ENOMEM;
break;
}
memset(fs_chunk, 0, sizeof(*fs_chunk));
- read_extent_buffer(eb, &chunk, btrfs_item_ptr_offset(eb, i),
- sizeof(chunk));
+ chunk = btrfs_item_ptr(eb, i, struct btrfs_chunk);
fs_chunk->logical = key.offset;
- fs_chunk->physical = btrfs_stack_stripe_offset(&chunk.stripe);
- fs_chunk->bytes = btrfs_stack_chunk_length(&chunk);
+ fs_chunk->physical = btrfs_stripe_offset_nr(eb, chunk, 0);
+ fs_chunk->bytes = btrfs_chunk_length(eb, chunk);
INIT_LIST_HEAD(&fs_chunk->list);
if (tree_search(&mdres->physical_tree, &fs_chunk->p,
physical_cmp, 1) != NULL)
else
tree_insert(&mdres->physical_tree, &fs_chunk->p,
physical_cmp);
- if (fs_chunk->physical + fs_chunk->bytes >
+
+ type = btrfs_chunk_type(eb, chunk);
+ if (type & BTRFS_BLOCK_GROUP_DUP) {
+ fs_chunk->physical_dup =
+ btrfs_stripe_offset_nr(eb, chunk, 1);
+ }
+
+ if (fs_chunk->physical_dup + fs_chunk->bytes >
+ mdres->last_physical_offset)
+ mdres->last_physical_offset = fs_chunk->physical_dup +
+ fs_chunk->bytes;
+ else if (fs_chunk->physical + fs_chunk->bytes >
mdres->last_physical_offset)
mdres->last_physical_offset = fs_chunk->physical +
fs_chunk->bytes;
mdres->alloced_chunks += fs_chunk->bytes;
+ /* in dup case, fs_chunk->bytes should add twice */
+ if (fs_chunk->physical_dup)
+ mdres->alloced_chunks += fs_chunk->bytes;
tree_insert(&mdres->chunk_tree, &fs_chunk->l, chunk_cmp);
}
out:
cluster = malloc(BLOCK_SIZE);
if (!cluster) {
- fprintf(stderr, "Error allocating cluster\n");
+ error("not enough memory for cluster");
return -ENOMEM;
}
buffer = malloc(max_size);
if (!buffer) {
- fprintf(stderr, "Error allocing buffer\n");
+ error("not enough memory for buffer");
free(cluster);
return -ENOMEM;
}
if (mdres->compress_method == COMPRESS_ZLIB) {
tmp = malloc(max_size);
if (!tmp) {
- fprintf(stderr, "Error allocing tmp buffer\n");
+ error("not enough memory for buffer");
free(cluster);
free(buffer);
return -ENOMEM;
bytenr = current_cluster;
while (1) {
if (fseek(mdres->in, current_cluster, SEEK_SET)) {
- fprintf(stderr, "Error seeking: %d\n", errno);
+ error("seek failed: %s\n", strerror(errno));
ret = -EIO;
break;
}
bytenr = 0;
continue;
}
- printf("ok this is where we screwed up?\n");
+ error(
+ "unknown state after reading cluster at %llu, probably crrupted data",
+ cluster_bytenr);
ret = -EIO;
break;
} else if (ret < 0) {
- fprintf(stderr, "Error reading image\n");
+ error("unable to read image at %llu: %s",
+ (unsigned long long)cluster_bytenr,
+ strerror(errno));
break;
}
ret = 0;
header = &cluster->header;
if (le64_to_cpu(header->magic) != HEADER_MAGIC ||
le64_to_cpu(header->bytenr) != current_cluster) {
- fprintf(stderr, "bad header in metadump image\n");
+ error("bad header in metadump image");
ret = -EIO;
break;
}
item_bytenr = le64_to_cpu(item->bytenr);
if (bufsize > max_size) {
- fprintf(stderr, "item %u size %u too big\n",
- i, bufsize);
+ error("item %u too big: %u > %u", i, bufsize,
+ max_size);
ret = -EIO;
break;
}
if (mdres->compress_method == COMPRESS_ZLIB) {
ret = fread(tmp, bufsize, 1, mdres->in);
if (ret != 1) {
- fprintf(stderr, "Error reading: %d\n",
- errno);
+ error("read error: %s", strerror(errno));
ret = -EIO;
break;
}
(unsigned long *)&size, tmp,
bufsize);
if (ret != Z_OK) {
- fprintf(stderr, "Error decompressing "
- "%d\n", ret);
+ error("decompressiion failed with %d",
+ ret);
ret = -EIO;
break;
}
} else {
ret = fread(buffer, bufsize, 1, mdres->in);
if (ret != 1) {
- fprintf(stderr, "Error reading: %d\n",
- errno);
+ error("read error: %s",
+ strerror(errno));
ret = -EIO;
break;
}
ret = fread(cluster, BLOCK_SIZE, 1, mdres->in);
if (ret <= 0) {
- fprintf(stderr, "Error reading in cluster: %d\n", errno);
+ error("unable to read cluster: %s", strerror(errno));
return -EIO;
}
ret = 0;
header = &cluster->header;
if (le64_to_cpu(header->magic) != HEADER_MAGIC ||
le64_to_cpu(header->bytenr) != 0) {
- fprintf(stderr, "bad header in metadump image\n");
+ error("bad header in metadump image");
return -EIO;
}
break;
bytenr += le32_to_cpu(item->size);
if (fseek(mdres->in, le32_to_cpu(item->size), SEEK_CUR)) {
- fprintf(stderr, "Error seeking: %d\n", errno);
+ error("seek failed: %s\n", strerror(errno));
return -EIO;
}
}
if (!item || le64_to_cpu(item->bytenr) != BTRFS_SUPER_INFO_OFFSET) {
- fprintf(stderr, "Huh, didn't find the super?\n");
+ error("did not find superblock at %llu",
+ le64_to_cpu(item->bytenr));
return -EINVAL;
}
buffer = malloc(le32_to_cpu(item->size));
if (!buffer) {
- fprintf(stderr, "Error allocing buffer\n");
+ error("not enough memory to allocate buffer");
return -ENOMEM;
}
ret = fread(buffer, le32_to_cpu(item->size), 1, mdres->in);
if (ret != 1) {
- fprintf(stderr, "Error reading buffer: %d\n", errno);
+ error("unable to read buffer: %s", strerror(errno));
free(buffer);
return -EIO;
}
ret = uncompress(tmp, (unsigned long *)&size,
buffer, le32_to_cpu(item->size));
if (ret != Z_OK) {
- fprintf(stderr, "Error decompressing %d\n", ret);
+ error("decompressiion failed with %d", ret);
free(buffer);
free(tmp);
return -EIO;
pthread_mutex_lock(&mdres->mutex);
super = (struct btrfs_super_block *)buffer;
chunk_root_bytenr = btrfs_super_chunk_root(super);
- mdres->leafsize = btrfs_super_leafsize(super);
+ mdres->nodesize = btrfs_super_nodesize(super);
memcpy(mdres->fsid, super->fsid, BTRFS_FSID_SIZE);
memcpy(mdres->uuid, super->dev_item.uuid,
BTRFS_UUID_SIZE);
list_del_init(&fs_chunk->list);
if (range_contains_super(fs_chunk->physical,
fs_chunk->bytes)) {
- fprintf(stderr, "Remapping a chunk that had a super "
- "mirror inside of it, clearing space cache "
- "so we don't end up with corruption\n");
+ warning(
+"remapping a chunk that had a super mirror inside of it, clearing space cache so we don't end up with corruption");
mdres->clear_space_cache = 1;
}
fs_chunk->physical = mdres->last_physical_offset;
{
struct btrfs_trans_handle *trans;
struct btrfs_dev_item *dev_item;
- struct btrfs_path *path;
+ struct btrfs_path path;
struct extent_buffer *leaf;
struct btrfs_root *root = fs_info->chunk_root;
struct btrfs_key key;
u64 devid, cur_devid;
int ret;
- path = btrfs_alloc_path();
- if (!path) {
- fprintf(stderr, "Error alloc'ing path\n");
- return -ENOMEM;
- }
-
trans = btrfs_start_transaction(fs_info->tree_root, 1);
if (IS_ERR(trans)) {
- fprintf(stderr, "Error starting transaction %ld\n",
- PTR_ERR(trans));
- btrfs_free_path(path);
+ error("cannot starting transaction %ld", PTR_ERR(trans));
return PTR_ERR(trans);
}
key.type = BTRFS_DEV_ITEM_KEY;
key.offset = 0;
+ btrfs_init_path(&path);
+
again:
- ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
+ ret = btrfs_search_slot(trans, root, &key, &path, -1, 1);
if (ret < 0) {
- fprintf(stderr, "search failed %d\n", ret);
+ error("search failed: %d", ret);
exit(1);
}
while (1) {
- leaf = path->nodes[0];
- if (path->slots[0] >= btrfs_header_nritems(leaf)) {
- ret = btrfs_next_leaf(root, path);
+ leaf = path.nodes[0];
+ if (path.slots[0] >= btrfs_header_nritems(leaf)) {
+ ret = btrfs_next_leaf(root, &path);
if (ret < 0) {
- fprintf(stderr, "Error going to next leaf "
- "%d\n", ret);
+ error("cannot go to next leaf %d", ret);
exit(1);
}
if (ret > 0) {
ret = 0;
break;
}
- leaf = path->nodes[0];
+ leaf = path.nodes[0];
}
- btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
+ btrfs_item_key_to_cpu(leaf, &key, path.slots[0]);
if (key.type > BTRFS_DEV_ITEM_KEY)
break;
if (key.type != BTRFS_DEV_ITEM_KEY) {
- path->slots[0]++;
+ path.slots[0]++;
continue;
}
- dev_item = btrfs_item_ptr(leaf, path->slots[0],
+ dev_item = btrfs_item_ptr(leaf, path.slots[0],
struct btrfs_dev_item);
cur_devid = btrfs_device_id(leaf, dev_item);
if (devid != cur_devid) {
- ret = btrfs_del_item(trans, root, path);
+ ret = btrfs_del_item(trans, root, &path);
if (ret) {
- fprintf(stderr, "Error deleting item %d\n",
- ret);
+ error("cannot delete item: %d", ret);
exit(1);
}
- btrfs_release_path(path);
+ btrfs_release_path(&path);
goto again;
}
btrfs_set_device_bytes_used(leaf, dev_item,
mdres->alloced_chunks);
btrfs_mark_buffer_dirty(leaf);
- path->slots[0]++;
+ path.slots[0]++;
}
- btrfs_free_path(path);
+ btrfs_release_path(&path);
ret = btrfs_commit_transaction(trans, fs_info->tree_root);
if (ret) {
- fprintf(stderr, "Commit failed %d\n", ret);
+ error("unable to commit transaction: %d", ret);
return ret;
}
return 0;
} else {
in = fopen(input, "r");
if (!in) {
- perror("unable to open metadump image");
+ error("unable to open metadump image: %s",
+ strerror(errno));
return 1;
}
}
/* NOTE: open with write mode */
if (fixup_offset) {
- BUG_ON(!target);
- info = open_ctree_fs_info(target, 0, 0,
+ info = open_ctree_fs_info(target, 0, 0, 0,
OPEN_CTREE_WRITES |
OPEN_CTREE_RESTORE |
OPEN_CTREE_PARTIAL);
if (!info) {
- fprintf(stderr, "%s: open ctree failed\n", __func__);
+ error("open ctree failed");
ret = -EIO;
goto failed_open;
}
cluster = malloc(BLOCK_SIZE);
if (!cluster) {
- fprintf(stderr, "Error allocating cluster\n");
+ error("not enough memory for cluster");
ret = -ENOMEM;
goto failed_info;
}
ret = mdrestore_init(&mdrestore, in, out, old_restore, num_threads,
fixup_offset, info, multi_devices);
if (ret) {
- fprintf(stderr, "Error initing mdrestore %d\n", ret);
+ error("failed to intialize metadata restore state: %d", ret);
goto failed_cluster;
}
}
if (in != stdin && fseek(in, 0, SEEK_SET)) {
- fprintf(stderr, "Error seeking %d\n", errno);
+ error("seek failed: %s\n", strerror(errno));
goto out;
}
header = &cluster->header;
if (le64_to_cpu(header->magic) != HEADER_MAGIC ||
le64_to_cpu(header->bytenr) != bytenr) {
- fprintf(stderr, "bad header in metadump image\n");
+ error("bad header in metadump image");
ret = -EIO;
break;
}
ret = add_cluster(cluster, &mdrestore, &bytenr);
if (ret) {
- fprintf(stderr, "Error adding cluster\n");
+ error("failed to add cluster: %d", ret);
break;
}
}
OPEN_CTREE_WRITES |
OPEN_CTREE_NO_DEVICES);
if (!root) {
- fprintf(stderr, "unable to open %s\n", target);
+ error("open ctree failed in %s", target);
ret = -EIO;
goto out;
}
info = root->fs_info;
if (stat(target, &st)) {
- fprintf(stderr, "statting %s failed\n", target);
+ error("stat %s failed: %s", target, strerror(errno));
close_ctree(info->chunk_root);
+ free(cluster);
return 1;
}
char fs_uuid[BTRFS_UUID_SIZE];
u64 devid, type, io_align, io_width;
u64 sector_size, total_bytes, bytes_used;
- char *buf;
- int fp;
+ char buf[BTRFS_SUPER_INFO_SIZE];
+ int fp = -1;
int ret;
key.objectid = BTRFS_DEV_ITEMS_OBJECTID;
btrfs_init_path(&path);
ret = btrfs_search_slot(NULL, info->chunk_root, &key, &path, 0, 0);
if (ret) {
- fprintf(stderr, "search key fails\n");
- exit(1);
+ error("search key failed: %d", ret);
+ ret = -EIO;
+ goto out;
}
leaf = path.nodes[0];
devid = btrfs_device_id(leaf, dev_item);
if (devid != cur_devid) {
- printk("devid %llu mismatch with %llu\n", devid, cur_devid);
- exit(1);
+ error("devid mismatch: %llu != %llu",
+ (unsigned long long)devid,
+ (unsigned long long)cur_devid);
+ ret = -EIO;
+ goto out;
}
type = btrfs_device_type(leaf, dev_item);
btrfs_release_path(&path);
- printk("update disk super on %s devid=%llu\n", other_dev, devid);
+ printf("update disk super on %s devid=%llu\n", other_dev, devid);
/* update other devices' super block */
fp = open(other_dev, O_CREAT | O_RDWR, 0600);
if (fp < 0) {
- fprintf(stderr, "could not open %s\n", other_dev);
- exit(1);
- }
-
- buf = malloc(BTRFS_SUPER_INFO_SIZE);
- if (!buf) {
- ret = -ENOMEM;
- close(fp);
- return ret;
+ error("could not open %s: %s", other_dev, strerror(errno));
+ ret = -EIO;
+ goto out;
}
memcpy(buf, info->super_copy, BTRFS_SUPER_INFO_SIZE);
ret = pwrite64(fp, buf, BTRFS_SUPER_INFO_SIZE, BTRFS_SUPER_INFO_OFFSET);
if (ret != BTRFS_SUPER_INFO_SIZE) {
+ if (ret < 0)
+ error("cannot write superblock: %s", strerror(ret));
+ else
+ error("cannot write superblock");
ret = -EIO;
goto out;
}
write_backup_supers(fp, (u8 *)buf);
out:
- free(buf);
- close(fp);
- return 0;
+ if (fp != -1)
+ close(fp);
+ return ret;
}
static void print_usage(int ret)
{
- fprintf(stderr, "usage: btrfs-image [options] source target\n");
- fprintf(stderr, "\t-r \trestore metadump image\n");
- fprintf(stderr, "\t-c value\tcompression level (0 ~ 9)\n");
- fprintf(stderr, "\t-t value\tnumber of threads (1 ~ 32)\n");
- fprintf(stderr, "\t-o \tdon't mess with the chunk tree when restoring\n");
- fprintf(stderr, "\t-s \tsanitize file names, use once to just use garbage, use twice if you want crc collisions\n");
- fprintf(stderr, "\t-w \twalk all trees instead of using extent tree, do this if your extent tree is broken\n");
- fprintf(stderr, "\t-m \trestore for multiple devices\n");
- fprintf(stderr, "\n");
- fprintf(stderr, "\tIn the dump mode, source is the btrfs device and target is the output file (use '-' for stdout).\n");
- fprintf(stderr, "\tIn the restore mode, source is the dumped image and target is the btrfs device/file.\n");
+ printf("usage: btrfs-image [options] source target\n");
+ printf("\t-r \trestore metadump image\n");
+ printf("\t-c value\tcompression level (0 ~ 9)\n");
+ printf("\t-t value\tnumber of threads (1 ~ 32)\n");
+ printf("\t-o \tdon't mess with the chunk tree when restoring\n");
+ printf("\t-s \tsanitize file names, use once to just use garbage, use twice if you want crc collisions\n");
+ printf("\t-w \twalk all trees instead of using extent tree, do this if your extent tree is broken\n");
+ printf("\t-m \trestore for multiple devices\n");
+ printf("\n");
+ printf("\tIn the dump mode, source is the btrfs device and target is the output file (use '-' for stdout).\n");
+ printf("\tIn the restore mode, source is the dumped image and target is the btrfs device/file.\n");
exit(ret);
}
{
char *source;
char *target;
- u64 num_threads = 1;
+ u64 num_threads = 0;
u64 compress_level = 0;
int create = 1;
int old_restore = 0;
break;
case 't':
num_threads = arg_strtou64(optarg);
- if (num_threads > 32)
- print_usage(1);
+ if (num_threads > MAX_WORKER_THREADS) {
+ error("number of threads out of range: %llu > %d",
+ (unsigned long long)num_threads,
+ MAX_WORKER_THREADS);
+ return 1;
+ }
break;
case 'c':
compress_level = arg_strtou64(optarg);
- if (compress_level > 9)
- print_usage(1);
+ if (compress_level > 9) {
+ error("compression level out of range: %llu",
+ (unsigned long long)compress_level);
+ return 1;
+ }
break;
case 'o':
old_restore = 1;
}
}
- argc = argc - optind;
set_argv0(argv);
- if (check_argc_min(argc, 2))
+ if (check_argc_min(argc - optind, 2))
print_usage(1);
- dev_cnt = argc - 1;
+ dev_cnt = argc - optind - 1;
if (create) {
if (old_restore) {
- fprintf(stderr, "Usage error: create and restore cannot be used at the same time\n");
+ error(
+ "create and restore cannot be used at the same time");
usage_error++;
}
} else {
if (walk_trees || sanitize || compress_level) {
- fprintf(stderr, "Usage error: use -w, -s, -c options for restore makes no sense\n");
+ error(
+ "useing -w, -s, -c options for restore makes no sense");
usage_error++;
}
if (multi_devices && dev_cnt < 2) {
- fprintf(stderr, "Usage error: not enough devices specified for -m option\n");
+ error("not enough devices specified for -m option");
usage_error++;
}
if (!multi_devices && dev_cnt != 1) {
- fprintf(stderr, "Usage error: accepts only 1 device without -m option\n");
+ error("accepts only 1 device without -m option");
usage_error++;
}
}
} else {
out = fopen(target, "w+");
if (!out) {
- perror("unable to create target file");
+ error("unable to create target file %s", target);
exit(1);
}
}
- if (num_threads == 1 && compress_level > 0) {
- num_threads = sysconf(_SC_NPROCESSORS_ONLN);
- if (num_threads <= 0)
- num_threads = 1;
+ if (compress_level > 0 || create == 0) {
+ if (num_threads == 0) {
+ long tmp = sysconf(_SC_NPROCESSORS_ONLN);
+
+ if (tmp <= 0)
+ tmp = 1;
+ num_threads = tmp;
+ }
+ } else {
+ num_threads = 0;
}
if (create) {
ret = check_mounted(source);
if (ret < 0) {
- fprintf(stderr, "Could not check mount status: %s\n",
- strerror(-ret));
- exit(1);
- } else if (ret)
- fprintf(stderr,
- "WARNING: The device is mounted. Make sure the filesystem is quiescent.\n");
+ warning("unable to check mount status of: %s",
+ strerror(-ret));
+ } else if (ret) {
+ warning("%s already mounted, results may be inaccurate",
+ source);
+ }
ret = create_metadump(source, out, num_threads,
compress_level, sanitize, walk_trees);
0, target, multi_devices);
}
if (ret) {
- printk("%s failed (%s)\n", (create) ? "create" : "restore",
+ error("%s failed: %s", (create) ? "create" : "restore",
strerror(errno));
goto out;
}
u64 total_devs;
int i;
- info = open_ctree_fs_info(target, 0, 0,
+ info = open_ctree_fs_info(target, 0, 0, 0,
OPEN_CTREE_PARTIAL |
OPEN_CTREE_RESTORE);
if (!info) {
- int e = errno;
- fprintf(stderr, "unable to open %s error = %s\n",
- target, strerror(e));
+ error("open ctree failed at %s", target);
return 1;
}
total_devs = btrfs_super_num_devices(info->super_copy);
if (total_devs != dev_cnt) {
- printk("it needs %llu devices but has only %d\n",
+ error("it needs %llu devices but has only %d",
total_devs, dev_cnt);
close_ctree(info->chunk_root);
goto out;
ret = update_disk_super_on_device(info,
argv[optind + i], (u64)i);
if (ret) {
- printk("update disk super failed devid=%d (error=%d)\n",
+ error("update disk superblock failed devid %d: %d",
i, ret);
close_ctree(info->chunk_root);
exit(1);
ret = restore_metadump(source, out, 0, num_threads, 1,
target, 1);
if (ret) {
- fprintf(stderr, "fix metadump failed (error=%d)\n",
- ret);
+ error("unable to fixup metadump: %d", ret);
exit(1);
}
}
unlink_ret = unlink(target);
if (unlink_ret)
- fprintf(stderr,
- "unlink output file failed : %s\n",
- strerror(errno));
+ error("unlink output file %s failed: %s",
+ target, strerror(errno));
}
}
+ btrfs_close_all_devices();
+
return !!ret;
}
projects / platform / upstream / btrfs-progs.git / blobdiff