* Boston, MA 021110-1307, USA.
*/
-#define _XOPEN_SOURCE 500
-#define _GNU_SOURCE 1
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <zlib.h>
+#include <getopt.h>
+
#include "kerncompat.h"
#include "crc32c.h"
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
#include "utils.h"
-#include "version.h"
#include "volumes.h"
+#include "extent_io.h"
#define HEADER_MAGIC 0xbd5c25e27295668bULL
#define MAX_PENDING_SIZE (256 * 1024)
#define ITEMS_PER_CLUSTER ((BLOCK_SIZE - sizeof(struct meta_cluster)) / \
sizeof(struct meta_cluster_item))
+struct fs_chunk {
+ u64 logical;
+ u64 physical;
+ u64 bytes;
+ struct rb_node l;
+ struct rb_node p;
+ struct list_head list;
+};
+
struct async_work {
struct list_head list;
struct list_head ordered;
int done;
int data;
int sanitize_names;
+
+ int error;
};
struct name {
pthread_mutex_t mutex;
pthread_cond_t cond;
+ struct rb_root chunk_tree;
+ struct rb_root physical_tree;
struct list_head list;
+ struct list_head overlapping_chunks;
size_t num_items;
- u64 leafsize;
+ u32 leafsize;
u64 devid;
+ u64 alloced_chunks;
+ u64 last_physical_offset;
u8 uuid[BTRFS_UUID_SIZE];
u8 fsid[BTRFS_FSID_SIZE];
int done;
int error;
int old_restore;
+ int fixup_offset;
+ int multi_devices;
+ int clear_space_cache;
+ struct btrfs_fs_info *info;
};
+static int search_for_chunk_blocks(struct mdrestore_struct *mdres,
+ u64 search, u64 cluster_bytenr);
static struct extent_buffer *alloc_dummy_eb(u64 bytenr, u32 size);
static void csum_block(u8 *buf, size_t len)
case BTRFS_DIR_INDEX_KEY:
case BTRFS_INODE_REF_KEY:
case BTRFS_INODE_EXTREF_KEY:
+ case BTRFS_XATTR_ITEM_KEY:
return 1;
default:
break;
return buf;
}
-static void tree_insert(struct rb_root *root, struct name *ins)
+static int name_cmp(struct rb_node *a, struct rb_node *b, int fuzz)
+{
+ struct name *entry = rb_entry(a, struct name, n);
+ struct name *ins = rb_entry(b, struct name, n);
+ u32 len;
+
+ len = min(ins->len, entry->len);
+ return memcmp(ins->val, entry->val, len);
+}
+
+static int chunk_cmp(struct rb_node *a, struct rb_node *b, int fuzz)
+{
+ struct fs_chunk *entry = rb_entry(a, struct fs_chunk, l);
+ struct fs_chunk *ins = rb_entry(b, struct fs_chunk, l);
+
+ if (fuzz && ins->logical >= entry->logical &&
+ ins->logical < entry->logical + entry->bytes)
+ return 0;
+
+ if (ins->logical < entry->logical)
+ return -1;
+ else if (ins->logical > entry->logical)
+ return 1;
+ return 0;
+}
+
+static int physical_cmp(struct rb_node *a, struct rb_node *b, int fuzz)
+{
+ struct fs_chunk *entry = rb_entry(a, struct fs_chunk, p);
+ struct fs_chunk *ins = rb_entry(b, struct fs_chunk, p);
+
+ if (fuzz && ins->physical >= entry->physical &&
+ ins->physical < entry->physical + entry->bytes)
+ return 0;
+
+ if (fuzz && entry->physical >= ins->physical &&
+ entry->physical < ins->physical + ins->bytes)
+ return 0;
+
+ if (ins->physical < entry->physical)
+ return -1;
+ else if (ins->physical > entry->physical)
+ return 1;
+ return 0;
+}
+
+static void tree_insert(struct rb_root *root, struct rb_node *ins,
+ int (*cmp)(struct rb_node *a, struct rb_node *b,
+ int fuzz))
{
struct rb_node ** p = &root->rb_node;
struct rb_node * parent = NULL;
- struct name *entry;
- u32 len;
int dir;
while(*p) {
parent = *p;
- entry = rb_entry(parent, struct name, n);
-
- len = min(ins->len, entry->len);
- dir = memcmp(ins->val, entry->val, len);
+ dir = cmp(*p, ins, 1);
if (dir < 0)
p = &(*p)->rb_left;
else if (dir > 0)
BUG();
}
- rb_link_node(&ins->n, parent, p);
- rb_insert_color(&ins->n, root);
+ rb_link_node(ins, parent, p);
+ rb_insert_color(ins, root);
}
-static struct name *name_search(struct rb_root *root, char *name, u32 name_len)
+static struct rb_node *tree_search(struct rb_root *root,
+ struct rb_node *search,
+ int (*cmp)(struct rb_node *a,
+ struct rb_node *b, int fuzz),
+ int fuzz)
{
struct rb_node *n = root->rb_node;
- struct name *entry = NULL;
- u32 len;
int dir;
while (n) {
- entry = rb_entry(n, struct name, n);
-
- len = min(entry->len, name_len);
-
- dir = memcmp(name, entry->val, len);
+ dir = cmp(n, search, fuzz);
if (dir < 0)
n = n->rb_left;
else if (dir > 0)
n = n->rb_right;
else
- return entry;
+ return n;
}
return NULL;
}
+static u64 logical_to_physical(struct mdrestore_struct *mdres, u64 logical, u64 *size)
+{
+ struct fs_chunk *fs_chunk;
+ struct rb_node *entry;
+ struct fs_chunk search;
+ u64 offset;
+
+ if (logical == BTRFS_SUPER_INFO_OFFSET)
+ return logical;
+
+ search.logical = logical;
+ 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");
+ return logical;
+ }
+ fs_chunk = rb_entry(entry, struct fs_chunk, l);
+ if (fs_chunk->logical > logical || fs_chunk->logical + fs_chunk->bytes < logical)
+ BUG();
+ offset = search.logical - fs_chunk->logical;
+
+ *size = min(*size, fs_chunk->bytes + fs_chunk->logical - logical);
+ return fs_chunk->physical + offset;
+}
+
+
static char *find_collision(struct metadump_struct *md, char *name,
u32 name_len)
{
struct name *val;
+ struct rb_node *entry;
+ struct name tmp;
unsigned long checksum;
int found = 0;
int i;
- val = name_search(&md->name_tree, name, name_len);
- if (val) {
+ tmp.val = name;
+ tmp.len = name_len;
+ entry = tree_search(&md->name_tree, &tmp.n, name_cmp, 0);
+ if (entry) {
+ val = rb_entry(entry, struct name, n);
free(name);
return val->sub;
}
val = malloc(sizeof(struct name));
if (!val) {
fprintf(stderr, "Couldn't sanitize name, enomem\n");
+ free(name);
return NULL;
}
if (!val->sub) {
fprintf(stderr, "Couldn't sanitize name, enomem\n");
free(val);
+ free(name);
return NULL;
}
if (val->sub[i] == 127) {
do {
i++;
- if (i > name_len)
+ if (i >= name_len)
break;
} while (val->sub[i] == 127);
- if (i > name_len)
+ if (i >= name_len)
break;
val->sub[i]++;
if (val->sub[i] == '/')
}
}
- tree_insert(&md->name_tree, val);
+ tree_insert(&md->name_tree, &val->n, name_cmp);
return val->sub;
}
}
}
+static void sanitize_xattr(struct metadump_struct *md,
+ struct extent_buffer *eb, int slot)
+{
+ struct btrfs_dir_item *dir_item;
+ unsigned long data_ptr;
+ u32 data_len;
+
+ dir_item = btrfs_item_ptr(eb, slot, struct btrfs_dir_item);
+ data_len = btrfs_dir_data_len(eb, dir_item);
+
+ data_ptr = (unsigned long)((char *)(dir_item + 1) +
+ btrfs_dir_name_len(eb, dir_item));
+ memset_extent_buffer(eb, 0, data_ptr, data_len);
+}
+
static void sanitize_name(struct metadump_struct *md, u8 *dst,
struct extent_buffer *src, struct btrfs_key *key,
int slot)
case BTRFS_INODE_EXTREF_KEY:
sanitize_inode_ref(md, eb, slot, 1);
break;
+ case BTRFS_XATTR_ITEM_KEY:
+ sanitize_xattr(md, eb, slot);
+ break;
default:
break;
}
int i, extent_type;
for (i = 0; i < nritems; i++) {
- item = btrfs_item_nr(src, i);
+ item = btrfs_item_nr(i);
btrfs_item_key_to_cpu(src, &key, i);
if (key.type == BTRFS_CSUM_ITEM_KEY) {
size = btrfs_item_size_nr(src, i);
async->bufsize = compressBound(async->size);
async->buffer = malloc(async->bufsize);
+ if (!async->buffer) {
+ fprintf(stderr, "Error allocing buffer\n");
+ pthread_mutex_lock(&md->mutex);
+ if (!md->error)
+ md->error = -ENOMEM;
+ pthread_mutex_unlock(&md->mutex);
+ pthread_exit(NULL);
+ }
ret = compress2(async->buffer,
(unsigned long *)&async->bufsize,
COMPRESS_ZLIB : COMPRESS_NONE;
}
+static void metadump_destroy(struct metadump_struct *md, int num_threads)
+{
+ int i;
+ struct rb_node *n;
+
+ pthread_mutex_lock(&md->mutex);
+ md->done = 1;
+ pthread_cond_broadcast(&md->cond);
+ pthread_mutex_unlock(&md->mutex);
+
+ for (i = 0; i < num_threads; i++)
+ pthread_join(md->threads[i], NULL);
+
+ pthread_cond_destroy(&md->cond);
+ pthread_mutex_destroy(&md->mutex);
+
+ while ((n = rb_first(&md->name_tree))) {
+ struct name *name;
+
+ name = rb_entry(n, struct name, n);
+ rb_erase(n, &md->name_tree);
+ free(name->val);
+ free(name->sub);
+ free(name);
+ }
+ free(md->threads);
+ free(md->cluster);
+}
+
static int metadump_init(struct metadump_struct *md, struct btrfs_root *root,
FILE *out, int num_threads, int compress_level,
int sanitize_names)
break;
}
- if (ret) {
- pthread_mutex_lock(&md->mutex);
- md->done = 1;
- pthread_cond_broadcast(&md->cond);
- pthread_mutex_unlock(&md->mutex);
-
- for (i--; i >= 0; i--)
- pthread_join(md->threads[i], NULL);
-
- pthread_cond_destroy(&md->cond);
- pthread_mutex_destroy(&md->mutex);
- free(md->cluster);
- free(md->threads);
- }
+ if (ret)
+ metadump_destroy(md, i + 1);
return ret;
}
-static void metadump_destroy(struct metadump_struct *md)
-{
- int i;
- struct rb_node *n;
-
- pthread_mutex_lock(&md->mutex);
- md->done = 1;
- pthread_cond_broadcast(&md->cond);
- pthread_mutex_unlock(&md->mutex);
-
- for (i = 0; i < md->num_threads; i++)
- pthread_join(md->threads[i], NULL);
-
- pthread_cond_destroy(&md->cond);
- pthread_mutex_destroy(&md->mutex);
-
- while ((n = rb_first(&md->name_tree))) {
- struct name *name;
-
- name = rb_entry(n, struct name, n);
- rb_erase(n, &md->name_tree);
- free(name->val);
- free(name->sub);
- free(name);
- }
- free(md->threads);
- free(md->cluster);
-}
-
static int write_zero(FILE *out, size_t size)
{
static char zero[BLOCK_SIZE];
goto out;
/* wait until all buffers are compressed */
- while (md->num_items > md->num_ready) {
+ while (!err && md->num_items > md->num_ready) {
struct timespec ts = {
.tv_sec = 0,
.tv_nsec = 10000000,
pthread_mutex_unlock(&md->mutex);
nanosleep(&ts, NULL);
pthread_mutex_lock(&md->mutex);
+ err = md->error;
+ }
+
+ if (err) {
+ fprintf(stderr, "One of the threads errored out %s\n",
+ strerror(err));
+ goto out;
}
/* setup and write index block */
return 0;
}
+static int get_dev_fd(struct btrfs_root *root)
+{
+ struct btrfs_device *dev;
+
+ dev = list_first_entry(&root->fs_info->fs_devices->devices,
+ struct btrfs_device, dev_list);
+ return dev->fd;
+}
+
static int flush_pending(struct metadump_struct *md, int done)
{
struct async_work *async = NULL;
}
}
+ /*
+ * Balance can make the mapping not cover the super block, so
+ * just copy directly from one of the devices.
+ */
+ if (start == BTRFS_SUPER_INFO_OFFSET) {
+ int fd = get_dev_fd(md->root);
+
+ ret = pread64(fd, async->buffer, size, start);
+ if (ret < size) {
+ free(async->buffer);
+ free(async);
+ fprintf(stderr, "Error reading superblock\n");
+ return -EIO;
+ }
+ size = 0;
+ ret = 0;
+ }
+
while (!md->data && size > 0) {
u64 this_read = min(blocksize, size);
eb = read_tree_block(md->root, start, this_read, 0);
- if (!eb) {
+ if (!extent_buffer_uptodate(eb)) {
free(async->buffer);
free(async);
fprintf(stderr,
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);
- if (!tmp) {
+ if (!extent_buffer_uptodate(tmp)) {
fprintf(stderr,
"Error reading log root block\n");
return -EIO;
} else {
bytenr = btrfs_node_blockptr(eb, i);
tmp = read_tree_block(root, bytenr, root->leafsize, 0);
- if (!tmp) {
+ if (!extent_buffer_uptodate(tmp)) {
fprintf(stderr, "Error reading log block\n");
return -EIO;
}
return ret;
}
+ leaf = path->nodes[0];
+
while (1) {
- leaf = path->nodes[0];
if (path->slots[0] >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(root, path);
if (ret < 0) {
if (ret) {
fprintf(stderr, "Error adding space cache blocks %d\n",
ret);
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
return ret;
}
path->slots[0]++;
int ret;
extent_root = metadump->root->fs_info->extent_root;
- bytenr = BTRFS_SUPER_INFO_OFFSET + 4096;
+ bytenr = BTRFS_SUPER_INFO_OFFSET + BTRFS_SUPER_INFO_SIZE;
key.objectid = bytenr;
key.type = BTRFS_EXTENT_ITEM_KEY;
key.offset = 0;
}
ret = 0;
+ leaf = path->nodes[0];
+
while (1) {
- leaf = path->nodes[0];
if (path->slots[0] >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(extent_root, path);
if (ret < 0) {
bytenr = key.objectid;
if (key.type == BTRFS_METADATA_ITEM_KEY)
- num_bytes = key.offset;
- else
num_bytes = extent_root->leafsize;
+ else
+ num_bytes = key.offset;
if (btrfs_item_size_nr(leaf, path->slots[0]) > sizeof(*ei)) {
ei = btrfs_item_ptr(leaf, path->slots[0],
bytenr += num_bytes;
}
- btrfs_release_path(extent_root, path);
+ btrfs_release_path(path);
return ret;
}
return ret;
}
- ret = add_extent(BTRFS_SUPER_INFO_OFFSET, 4096, &metadump, 0);
+ ret = add_extent(BTRFS_SUPER_INFO_OFFSET, BTRFS_SUPER_INFO_SIZE,
+ &metadump, 0);
if (ret) {
fprintf(stderr, "Error adding metadata %d\n", ret);
err = ret;
fprintf(stderr, "Error flushing pending %d\n", ret);
}
- metadump_destroy(&metadump);
+ metadump_destroy(&metadump, num_threads);
btrfs_free_path(path);
ret = close_ctree(root);
btrfs_set_stack_chunk_length(chunk, (u64)-1);
btrfs_set_stack_chunk_owner(chunk, BTRFS_EXTENT_TREE_OBJECTID);
- btrfs_set_stack_chunk_stripe_len(chunk, 64 * 1024);
+ btrfs_set_stack_chunk_stripe_len(chunk, BTRFS_STRIPE_LEN);
btrfs_set_stack_chunk_type(chunk, BTRFS_BLOCK_GROUP_SYSTEM);
btrfs_set_stack_chunk_io_align(chunk, sectorsize);
btrfs_set_stack_chunk_io_width(chunk, sectorsize);
btrfs_set_stack_chunk_num_stripes(chunk, 1);
btrfs_set_stack_chunk_sub_stripes(chunk, 0);
chunk->stripe.devid = super->dev_item.devid;
- chunk->stripe.offset = cpu_to_le64(0);
+ btrfs_set_stack_stripe_offset(&chunk->stripe, 0);
memcpy(chunk->stripe.dev_uuid, super->dev_item.uuid, BTRFS_UUID_SIZE);
btrfs_set_super_sys_array_size(super, sizeof(*key) + sizeof(*chunk));
- csum_block(buffer, 4096);
+ csum_block(buffer, BTRFS_SUPER_INFO_SIZE);
}
-static int update_super(u8 *buffer)
+static int update_super(struct mdrestore_struct *mdres, u8 *buffer)
{
struct btrfs_super_block *super = (struct btrfs_super_block *)buffer;
struct btrfs_chunk *chunk;
struct btrfs_disk_key *disk_key;
struct btrfs_key key;
+ u64 flags = btrfs_super_flags(super);
u32 new_array_size = 0;
u32 array_size;
u32 cur = 0;
- u32 new_cur = 0;
u8 *ptr, *write_ptr;
int old_num_stripes;
write_ptr += sizeof(*disk_key);
ptr += sizeof(*disk_key);
cur += sizeof(*disk_key);
- new_cur += sizeof(*disk_key);
if (key.type == BTRFS_CHUNK_ITEM_KEY) {
+ u64 physical, size = 0;
+
chunk = (struct btrfs_chunk *)ptr;
old_num_stripes = btrfs_stack_chunk_num_stripes(chunk);
chunk = (struct btrfs_chunk *)write_ptr;
btrfs_set_stack_chunk_sub_stripes(chunk, 0);
btrfs_set_stack_chunk_type(chunk,
BTRFS_BLOCK_GROUP_SYSTEM);
- chunk->stripe.devid = super->dev_item.devid;
- chunk->stripe.offset = cpu_to_le64(key.offset);
+ btrfs_set_stack_stripe_devid(&chunk->stripe,
+ super->dev_item.devid);
+ physical = logical_to_physical(mdres, key.offset,
+ &size);
+ if (size != (u64)-1)
+ btrfs_set_stack_stripe_offset(&chunk->stripe,
+ physical);
memcpy(chunk->stripe.dev_uuid, super->dev_item.uuid,
BTRFS_UUID_SIZE);
new_array_size += sizeof(*chunk);
- new_cur += sizeof(*chunk);
} else {
fprintf(stderr, "Bogus key in the sys chunk array "
"%d\n", key.type);
cur += btrfs_chunk_item_size(old_num_stripes);
}
+ if (mdres->clear_space_cache)
+ btrfs_set_super_cache_generation(super, 0);
+
+ flags |= BTRFS_SUPER_FLAG_METADUMP_V2;
+ btrfs_set_super_flags(super, flags);
btrfs_set_super_sys_array_size(super, new_array_size);
- csum_block(buffer, 4096);
+ csum_block(buffer, BTRFS_SUPER_INFO_SIZE);
return 0;
}
for (i = slot; i < nritems; i++) {
u32 ioff;
- item = btrfs_item_nr(eb, i);
+ item = btrfs_item_nr(i);
ioff = btrfs_item_offset(eb, item);
btrfs_set_item_offset(eb, item, ioff + size_diff);
}
memmove_extent_buffer(eb, btrfs_leaf_data(eb) + data_end + size_diff,
btrfs_leaf_data(eb) + data_end,
old_data_start + new_size - data_end);
- item = btrfs_item_nr(eb, slot);
+ item = btrfs_item_nr(slot);
btrfs_set_item_size(eb, item, new_size);
}
for (i = 0; i < btrfs_header_nritems(eb); i++) {
struct btrfs_chunk chunk;
struct btrfs_key key;
- u64 type;
+ u64 type, physical, size = (u64)-1;
btrfs_item_key_to_cpu(eb, &key, i);
if (key.type != BTRFS_CHUNK_ITEM_KEY)
btrfs_item_ptr_offset(eb, i),
sizeof(chunk));
+ size = 0;
+ physical = logical_to_physical(mdres, key.offset,
+ &size);
+
/* Zero out the RAID profile */
type = btrfs_stack_chunk_type(&chunk);
type &= (BTRFS_BLOCK_GROUP_DATA |
BTRFS_BLOCK_GROUP_SYSTEM |
- BTRFS_BLOCK_GROUP_METADATA);
+ BTRFS_BLOCK_GROUP_METADATA |
+ BTRFS_BLOCK_GROUP_DUP);
btrfs_set_stack_chunk_type(&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);
- btrfs_set_stack_stripe_offset(&chunk.stripe, key.offset);
+ 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,
bytenr += mdres->leafsize;
}
+ free(eb);
return 0;
}
static void write_backup_supers(int fd, u8 *buf)
{
+ struct btrfs_super_block *super = (struct btrfs_super_block *)buf;
struct stat st;
u64 size;
u64 bytenr;
for (i = 1; i < BTRFS_SUPER_MIRROR_MAX; i++) {
bytenr = btrfs_sb_offset(i);
- if (bytenr + 4096 > size)
+ if (bytenr + BTRFS_SUPER_INFO_SIZE > size)
break;
- ret = pwrite64(fd, buf, 4096, bytenr);
- if (ret < 4096) {
+ btrfs_set_super_bytenr(super, bytenr);
+ csum_block(buf, BTRFS_SUPER_INFO_SIZE);
+ 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);
u8 *outbuf;
int outfd;
int ret;
+ int compress_size = MAX_PENDING_SIZE * 4;
outfd = fileno(mdres->out);
- buffer = malloc(MAX_PENDING_SIZE * 2);
+ buffer = malloc(compress_size);
if (!buffer) {
fprintf(stderr, "Error allocing buffer\n");
pthread_mutex_lock(&mdres->mutex);
if (!mdres->error)
mdres->error = -ENOMEM;
pthread_mutex_unlock(&mdres->mutex);
- goto out;
+ pthread_exit(NULL);
}
while (1) {
+ u64 bytenr;
+ off_t offset = 0;
int err = 0;
pthread_mutex_lock(&mdres->mutex);
pthread_mutex_unlock(&mdres->mutex);
if (mdres->compress_method == COMPRESS_ZLIB) {
- size = MAX_PENDING_SIZE * 2;
+ size = compress_size;
ret = uncompress(buffer, (unsigned long *)&size,
async->buffer, async->bufsize);
if (ret != Z_OK) {
size = async->bufsize;
}
- if (async->start == BTRFS_SUPER_INFO_OFFSET) {
- if (mdres->old_restore) {
- update_super_old(outbuf);
- } else {
- ret = update_super(outbuf);
+ if (!mdres->multi_devices) {
+ if (async->start == BTRFS_SUPER_INFO_OFFSET) {
+ if (mdres->old_restore) {
+ update_super_old(outbuf);
+ } else {
+ ret = update_super(mdres, outbuf);
+ if (ret)
+ err = ret;
+ }
+ } else if (!mdres->old_restore) {
+ ret = fixup_chunk_tree_block(mdres, async, outbuf, size);
if (ret)
err = ret;
}
- } else if (!mdres->old_restore) {
- ret = fixup_chunk_tree_block(mdres, async, outbuf, size);
- if (ret)
- err = ret;
}
- ret = pwrite64(outfd, outbuf, size, async->start);
- if (ret < size) {
- if (ret < 0) {
- fprintf(stderr, "Error writing to device %d\n",
- errno);
- err = errno;
- } else {
- fprintf(stderr, "Short write\n");
- err = -EIO;
+ if (!mdres->fixup_offset) {
+ while (size) {
+ u64 chunk_size = size;
+ if (!mdres->multi_devices && !mdres->old_restore)
+ bytenr = logical_to_physical(mdres,
+ async->start + offset,
+ &chunk_size);
+ 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;
+ }
+ }
+ size -= chunk_size;
+ offset += chunk_size;
+ }
+ } 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");
+ exit(1);
}
}
- if (async->start == BTRFS_SUPER_INFO_OFFSET)
+
+ /* backup super blocks are already there at fixup_offset stage */
+ if (!mdres->multi_devices && async->start == BTRFS_SUPER_INFO_OFFSET)
write_backup_supers(outfd, outbuf);
pthread_mutex_lock(&mdres->mutex);
pthread_exit(NULL);
}
-static void mdrestore_destroy(struct mdrestore_struct *mdres)
+static void mdrestore_destroy(struct mdrestore_struct *mdres, int num_threads)
{
+ struct rb_node *n;
int i;
+
+ while ((n = rb_first(&mdres->chunk_tree))) {
+ struct fs_chunk *entry;
+
+ entry = rb_entry(n, struct fs_chunk, l);
+ rb_erase(n, &mdres->chunk_tree);
+ rb_erase(&entry->p, &mdres->physical_tree);
+ free(entry);
+ }
pthread_mutex_lock(&mdres->mutex);
mdres->done = 1;
pthread_cond_broadcast(&mdres->cond);
pthread_mutex_unlock(&mdres->mutex);
- for (i = 0; i < mdres->num_threads; i++)
+ for (i = 0; i < num_threads; i++)
pthread_join(mdres->threads[i], NULL);
pthread_cond_destroy(&mdres->cond);
static int mdrestore_init(struct mdrestore_struct *mdres,
FILE *in, FILE *out, int old_restore,
- int num_threads)
+ int num_threads, int fixup_offset,
+ struct btrfs_fs_info *info, int multi_devices)
{
int i, ret = 0;
pthread_cond_init(&mdres->cond, NULL);
pthread_mutex_init(&mdres->mutex, NULL);
INIT_LIST_HEAD(&mdres->list);
+ INIT_LIST_HEAD(&mdres->overlapping_chunks);
mdres->in = in;
mdres->out = out;
mdres->old_restore = old_restore;
+ mdres->chunk_tree.rb_node = NULL;
+ mdres->fixup_offset = fixup_offset;
+ mdres->info = info;
+ mdres->multi_devices = multi_devices;
+ mdres->clear_space_cache = 0;
+ mdres->last_physical_offset = 0;
+ mdres->alloced_chunks = 0;
if (!num_threads)
return 0;
break;
}
if (ret)
- mdrestore_destroy(mdres);
+ mdrestore_destroy(mdres, i + 1);
return ret;
}
u8 *outbuf;
int ret;
+ /* We've already been initialized */
+ if (mdres->leafsize)
+ return 0;
+
if (mdres->compress_method == COMPRESS_ZLIB) {
size_t size = MAX_PENDING_SIZE * 2;
u32 i, nritems;
int ret;
- BUG_ON(mdres->num_items);
mdres->compress_method = header->compress;
bytenr = le64_to_cpu(header->bytenr) + BLOCK_SIZE;
return ret;
}
-static int restore_metadump(const char *input, FILE *out, int old_restore,
- int num_threads)
+static int read_chunk_block(struct mdrestore_struct *mdres, u8 *buffer,
+ u64 bytenr, u64 item_bytenr, u32 bufsize,
+ u64 cluster_bytenr)
{
- struct meta_cluster *cluster = NULL;
- struct meta_cluster_header *header;
- struct mdrestore_struct mdrestore;
- u64 bytenr = 0;
- FILE *in = NULL;
+ struct extent_buffer *eb;
int ret = 0;
+ int i;
- if (!strcmp(input, "-")) {
- in = stdin;
- } else {
- in = fopen(input, "r");
- if (!in) {
- perror("unable to open metadump image");
- return 1;
+ eb = alloc_dummy_eb(bytenr, mdres->leafsize);
+ if (!eb) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ while (item_bytenr != bytenr) {
+ buffer += mdres->leafsize;
+ item_bytenr += mdres->leafsize;
+ }
+
+ memcpy(eb->data, buffer, mdres->leafsize);
+ if (btrfs_header_bytenr(eb) != bytenr) {
+ fprintf(stderr, "Eb bytenr doesn't match found bytenr\n");
+ 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");
+ ret = -EIO;
+ goto out;
+ }
+
+ if (btrfs_header_owner(eb) != BTRFS_CHUNK_TREE_OBJECTID) {
+ fprintf(stderr, "Does not belong to the chunk tree\n");
+ ret = -EIO;
+ goto out;
+ }
+
+ for (i = 0; i < btrfs_header_nritems(eb); i++) {
+ struct btrfs_chunk chunk;
+ struct fs_chunk *fs_chunk;
+ struct btrfs_key key;
+
+ if (btrfs_header_level(eb)) {
+ u64 blockptr = btrfs_node_blockptr(eb, i);
+
+ ret = search_for_chunk_blocks(mdres, blockptr,
+ cluster_bytenr);
+ if (ret)
+ break;
+ continue;
+ }
+
+ /* Yay a leaf! We loves leafs! */
+ btrfs_item_key_to_cpu(eb, &key, i);
+ if (key.type != BTRFS_CHUNK_ITEM_KEY)
+ continue;
+
+ fs_chunk = malloc(sizeof(struct fs_chunk));
+ if (!fs_chunk) {
+ fprintf(stderr, "Erorr allocating chunk\n");
+ ret = -ENOMEM;
+ break;
}
+ memset(fs_chunk, 0, sizeof(*fs_chunk));
+ read_extent_buffer(eb, &chunk, btrfs_item_ptr_offset(eb, i),
+ sizeof(chunk));
+
+ fs_chunk->logical = key.offset;
+ fs_chunk->physical = btrfs_stack_stripe_offset(&chunk.stripe);
+ fs_chunk->bytes = btrfs_stack_chunk_length(&chunk);
+ INIT_LIST_HEAD(&fs_chunk->list);
+ if (tree_search(&mdres->physical_tree, &fs_chunk->p,
+ physical_cmp, 1) != NULL)
+ list_add(&fs_chunk->list, &mdres->overlapping_chunks);
+ else
+ tree_insert(&mdres->physical_tree, &fs_chunk->p,
+ physical_cmp);
+ 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;
+ tree_insert(&mdres->chunk_tree, &fs_chunk->l, chunk_cmp);
}
+out:
+ free(eb);
+ return ret;
+}
+
+/* If you have to ask you aren't worthy */
+static int search_for_chunk_blocks(struct mdrestore_struct *mdres,
+ u64 search, u64 cluster_bytenr)
+{
+ struct meta_cluster *cluster;
+ struct meta_cluster_header *header;
+ struct meta_cluster_item *item;
+ u64 current_cluster = cluster_bytenr, bytenr;
+ u64 item_bytenr;
+ u32 bufsize, nritems, i;
+ u32 max_size = MAX_PENDING_SIZE * 2;
+ u8 *buffer, *tmp = NULL;
+ int ret = 0;
cluster = malloc(BLOCK_SIZE);
if (!cluster) {
fprintf(stderr, "Error allocating cluster\n");
- if (in != stdin)
- fclose(in);
return -ENOMEM;
}
- ret = mdrestore_init(&mdrestore, in, out, old_restore, num_threads);
- if (ret) {
- fprintf(stderr, "Error initing mdrestore %d\n", ret);
- if (in != stdin)
- fclose(in);
+ buffer = malloc(max_size);
+ if (!buffer) {
+ fprintf(stderr, "Error allocing buffer\n");
free(cluster);
- return ret;
+ return -ENOMEM;
+ }
+
+ if (mdres->compress_method == COMPRESS_ZLIB) {
+ tmp = malloc(max_size);
+ if (!tmp) {
+ fprintf(stderr, "Error allocing tmp buffer\n");
+ free(cluster);
+ free(buffer);
+ return -ENOMEM;
+ }
}
+ bytenr = current_cluster;
while (1) {
- ret = fread(cluster, BLOCK_SIZE, 1, in);
- if (!ret)
+ if (fseek(mdres->in, current_cluster, SEEK_SET)) {
+ fprintf(stderr, "Error seeking: %d\n", errno);
+ ret = -EIO;
break;
+ }
- 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");
+ ret = fread(cluster, BLOCK_SIZE, 1, mdres->in);
+ if (ret == 0) {
+ if (cluster_bytenr != 0) {
+ cluster_bytenr = 0;
+ current_cluster = 0;
+ bytenr = 0;
+ continue;
+ }
+ printf("ok this is where we screwed up?\n");
ret = -EIO;
break;
- }
- ret = add_cluster(cluster, &mdrestore, &bytenr);
- if (ret) {
- fprintf(stderr, "Error adding cluster\n");
+ } else if (ret < 0) {
+ fprintf(stderr, "Error reading image\n");
break;
}
+ ret = 0;
- ret = wait_for_worker(&mdrestore);
- if (ret) {
- fprintf(stderr, "One of the threads errored out %d\n",
- ret);
+ 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");
+ ret = -EIO;
break;
}
- }
- mdrestore_destroy(&mdrestore);
- free(cluster);
- if (in != stdin)
- fclose(in);
- return ret;
-}
+ bytenr += BLOCK_SIZE;
+ nritems = le32_to_cpu(header->nritems);
+ for (i = 0; i < nritems; i++) {
+ size_t size;
-static void print_usage(void)
-{
+ item = &cluster->items[i];
+ bufsize = le32_to_cpu(item->size);
+ item_bytenr = le64_to_cpu(item->bytenr);
+
+ if (bufsize > max_size) {
+ fprintf(stderr, "item %u size %u too big\n",
+ i, bufsize);
+ 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);
+ ret = -EIO;
+ break;
+ }
+
+ size = max_size;
+ ret = uncompress(buffer,
+ (unsigned long *)&size, tmp,
+ bufsize);
+ if (ret != Z_OK) {
+ fprintf(stderr, "Error decompressing "
+ "%d\n", ret);
+ ret = -EIO;
+ break;
+ }
+ } else {
+ ret = fread(buffer, bufsize, 1, mdres->in);
+ if (ret != 1) {
+ fprintf(stderr, "Error reading: %d\n",
+ errno);
+ ret = -EIO;
+ break;
+ }
+ size = bufsize;
+ }
+ ret = 0;
+
+ if (item_bytenr <= search &&
+ item_bytenr + size > search) {
+ ret = read_chunk_block(mdres, buffer, search,
+ item_bytenr, size,
+ current_cluster);
+ if (!ret)
+ ret = 1;
+ break;
+ }
+ bytenr += bufsize;
+ }
+ if (ret) {
+ if (ret > 0)
+ ret = 0;
+ break;
+ }
+ if (bytenr & BLOCK_MASK)
+ bytenr += BLOCK_SIZE - (bytenr & BLOCK_MASK);
+ current_cluster = bytenr;
+ }
+
+ free(tmp);
+ free(buffer);
+ free(cluster);
+ return ret;
+}
+
+static int build_chunk_tree(struct mdrestore_struct *mdres,
+ struct meta_cluster *cluster)
+{
+ struct btrfs_super_block *super;
+ struct meta_cluster_header *header;
+ struct meta_cluster_item *item = NULL;
+ u64 chunk_root_bytenr = 0;
+ u32 i, nritems;
+ u64 bytenr = 0;
+ u8 *buffer;
+ int ret;
+
+ /* We can't seek with stdin so don't bother doing this */
+ if (mdres->in == stdin)
+ return 0;
+
+ ret = fread(cluster, BLOCK_SIZE, 1, mdres->in);
+ if (ret <= 0) {
+ fprintf(stderr, "Error reading in cluster: %d\n", 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");
+ return -EIO;
+ }
+
+ bytenr += BLOCK_SIZE;
+ mdres->compress_method = header->compress;
+ nritems = le32_to_cpu(header->nritems);
+ for (i = 0; i < nritems; i++) {
+ item = &cluster->items[i];
+
+ if (le64_to_cpu(item->bytenr) == BTRFS_SUPER_INFO_OFFSET)
+ 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);
+ return -EIO;
+ }
+ }
+
+ if (!item || le64_to_cpu(item->bytenr) != BTRFS_SUPER_INFO_OFFSET) {
+ fprintf(stderr, "Huh, didn't find the super?\n");
+ return -EINVAL;
+ }
+
+ buffer = malloc(le32_to_cpu(item->size));
+ if (!buffer) {
+ fprintf(stderr, "Error allocing buffer\n");
+ return -ENOMEM;
+ }
+
+ ret = fread(buffer, le32_to_cpu(item->size), 1, mdres->in);
+ if (ret != 1) {
+ fprintf(stderr, "Error reading buffer: %d\n", errno);
+ free(buffer);
+ return -EIO;
+ }
+
+ if (mdres->compress_method == COMPRESS_ZLIB) {
+ size_t size = MAX_PENDING_SIZE * 2;
+ u8 *tmp;
+
+ tmp = malloc(MAX_PENDING_SIZE * 2);
+ if (!tmp) {
+ free(buffer);
+ return -ENOMEM;
+ }
+ ret = uncompress(tmp, (unsigned long *)&size,
+ buffer, le32_to_cpu(item->size));
+ if (ret != Z_OK) {
+ fprintf(stderr, "Error decompressing %d\n", ret);
+ free(buffer);
+ free(tmp);
+ return -EIO;
+ }
+ free(buffer);
+ buffer = tmp;
+ }
+
+ 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);
+ memcpy(mdres->fsid, super->fsid, BTRFS_FSID_SIZE);
+ memcpy(mdres->uuid, super->dev_item.uuid,
+ BTRFS_UUID_SIZE);
+ mdres->devid = le64_to_cpu(super->dev_item.devid);
+ free(buffer);
+ pthread_mutex_unlock(&mdres->mutex);
+
+ return search_for_chunk_blocks(mdres, chunk_root_bytenr, 0);
+}
+
+static int range_contains_super(u64 physical, u64 bytes)
+{
+ u64 super_bytenr;
+ int i;
+
+ for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
+ super_bytenr = btrfs_sb_offset(i);
+ if (super_bytenr >= physical &&
+ super_bytenr < physical + bytes)
+ return 1;
+ }
+
+ return 0;
+}
+
+static void remap_overlapping_chunks(struct mdrestore_struct *mdres)
+{
+ struct fs_chunk *fs_chunk;
+
+ while (!list_empty(&mdres->overlapping_chunks)) {
+ fs_chunk = list_first_entry(&mdres->overlapping_chunks,
+ struct fs_chunk, list);
+ 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");
+ mdres->clear_space_cache = 1;
+ }
+ fs_chunk->physical = mdres->last_physical_offset;
+ tree_insert(&mdres->physical_tree, &fs_chunk->p, physical_cmp);
+ mdres->last_physical_offset += fs_chunk->bytes;
+ }
+}
+
+static int fixup_devices(struct btrfs_fs_info *fs_info,
+ struct mdrestore_struct *mdres, off_t dev_size)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_dev_item *dev_item;
+ 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);
+ return PTR_ERR(trans);
+ }
+
+ dev_item = &fs_info->super_copy->dev_item;
+
+ devid = btrfs_stack_device_id(dev_item);
+
+ btrfs_set_stack_device_total_bytes(dev_item, dev_size);
+ btrfs_set_stack_device_bytes_used(dev_item, mdres->alloced_chunks);
+
+ key.objectid = BTRFS_DEV_ITEMS_OBJECTID;
+ key.type = BTRFS_DEV_ITEM_KEY;
+ key.offset = 0;
+
+again:
+ ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
+ if (ret < 0) {
+ fprintf(stderr, "search failed %d\n", ret);
+ exit(1);
+ }
+
+ while (1) {
+ 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);
+ exit(1);
+ }
+ if (ret > 0) {
+ ret = 0;
+ break;
+ }
+ leaf = path->nodes[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]++;
+ continue;
+ }
+
+ 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);
+ if (ret) {
+ fprintf(stderr, "Error deleting item %d\n",
+ ret);
+ exit(1);
+ }
+ btrfs_release_path(path);
+ goto again;
+ }
+
+ btrfs_set_device_total_bytes(leaf, dev_item, dev_size);
+ btrfs_set_device_bytes_used(leaf, dev_item,
+ mdres->alloced_chunks);
+ btrfs_mark_buffer_dirty(leaf);
+ path->slots[0]++;
+ }
+
+ btrfs_free_path(path);
+ ret = btrfs_commit_transaction(trans, fs_info->tree_root);
+ if (ret) {
+ fprintf(stderr, "Commit failed %d\n", ret);
+ return ret;
+ }
+ return 0;
+}
+
+static int restore_metadump(const char *input, FILE *out, int old_restore,
+ int num_threads, int fixup_offset,
+ const char *target, int multi_devices)
+{
+ struct meta_cluster *cluster = NULL;
+ struct meta_cluster_header *header;
+ struct mdrestore_struct mdrestore;
+ struct btrfs_fs_info *info = NULL;
+ u64 bytenr = 0;
+ FILE *in = NULL;
+ int ret = 0;
+
+ if (!strcmp(input, "-")) {
+ in = stdin;
+ } else {
+ in = fopen(input, "r");
+ if (!in) {
+ perror("unable to open metadump image");
+ return 1;
+ }
+ }
+
+ /* NOTE: open with write mode */
+ if (fixup_offset) {
+ BUG_ON(!target);
+ info = open_ctree_fs_info(target, 0, 0,
+ OPEN_CTREE_WRITES |
+ OPEN_CTREE_RESTORE |
+ OPEN_CTREE_PARTIAL);
+ if (!info) {
+ fprintf(stderr, "%s: open ctree failed\n", __func__);
+ ret = -EIO;
+ goto failed_open;
+ }
+ }
+
+ cluster = malloc(BLOCK_SIZE);
+ if (!cluster) {
+ fprintf(stderr, "Error allocating cluster\n");
+ 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);
+ goto failed_cluster;
+ }
+
+ if (!multi_devices && !old_restore) {
+ ret = build_chunk_tree(&mdrestore, cluster);
+ if (ret)
+ goto out;
+ if (!list_empty(&mdrestore.overlapping_chunks))
+ remap_overlapping_chunks(&mdrestore);
+ }
+
+ if (in != stdin && fseek(in, 0, SEEK_SET)) {
+ fprintf(stderr, "Error seeking %d\n", errno);
+ goto out;
+ }
+
+ while (!mdrestore.error) {
+ ret = fread(cluster, BLOCK_SIZE, 1, in);
+ if (!ret)
+ break;
+
+ 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");
+ ret = -EIO;
+ break;
+ }
+ ret = add_cluster(cluster, &mdrestore, &bytenr);
+ if (ret) {
+ fprintf(stderr, "Error adding cluster\n");
+ break;
+ }
+ }
+ ret = wait_for_worker(&mdrestore);
+
+ if (!ret && !multi_devices && !old_restore) {
+ struct btrfs_root *root;
+ struct stat st;
+
+ root = open_ctree_fd(fileno(out), target, 0,
+ OPEN_CTREE_PARTIAL |
+ OPEN_CTREE_WRITES |
+ OPEN_CTREE_NO_DEVICES);
+ if (!root) {
+ fprintf(stderr, "unable to open %s\n", target);
+ ret = -EIO;
+ goto out;
+ }
+ info = root->fs_info;
+
+ if (stat(target, &st)) {
+ fprintf(stderr, "statting %s failed\n", target);
+ close_ctree(info->chunk_root);
+ return 1;
+ }
+
+ ret = fixup_devices(info, &mdrestore, st.st_size);
+ close_ctree(info->chunk_root);
+ if (ret)
+ goto out;
+ }
+out:
+ mdrestore_destroy(&mdrestore, num_threads);
+failed_cluster:
+ free(cluster);
+failed_info:
+ if (fixup_offset && info)
+ close_ctree(info->chunk_root);
+failed_open:
+ if (in != stdin)
+ fclose(in);
+ return ret;
+}
+
+static int update_disk_super_on_device(struct btrfs_fs_info *info,
+ const char *other_dev, u64 cur_devid)
+{
+ struct btrfs_key key;
+ struct extent_buffer *leaf;
+ struct btrfs_path path;
+ struct btrfs_dev_item *dev_item;
+ struct btrfs_super_block *disk_super;
+ char dev_uuid[BTRFS_UUID_SIZE];
+ char fs_uuid[BTRFS_UUID_SIZE];
+ u64 devid, type, io_align, io_width;
+ u64 sector_size, total_bytes, bytes_used;
+ char *buf;
+ int fp;
+ int ret;
+
+ key.objectid = BTRFS_DEV_ITEMS_OBJECTID;
+ key.type = BTRFS_DEV_ITEM_KEY;
+ key.offset = cur_devid;
+
+ 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);
+ }
+
+ leaf = path.nodes[0];
+ dev_item = btrfs_item_ptr(leaf, path.slots[0],
+ struct btrfs_dev_item);
+
+ devid = btrfs_device_id(leaf, dev_item);
+ if (devid != cur_devid) {
+ printk("devid %llu mismatch with %llu\n", devid, cur_devid);
+ exit(1);
+ }
+
+ type = btrfs_device_type(leaf, dev_item);
+ io_align = btrfs_device_io_align(leaf, dev_item);
+ io_width = btrfs_device_io_width(leaf, dev_item);
+ sector_size = btrfs_device_sector_size(leaf, dev_item);
+ total_bytes = btrfs_device_total_bytes(leaf, dev_item);
+ bytes_used = btrfs_device_bytes_used(leaf, dev_item);
+ read_extent_buffer(leaf, dev_uuid, (unsigned long)btrfs_device_uuid(dev_item), BTRFS_UUID_SIZE);
+ read_extent_buffer(leaf, fs_uuid, (unsigned long)btrfs_device_fsid(dev_item), BTRFS_UUID_SIZE);
+
+ btrfs_release_path(&path);
+
+ printk("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;
+ }
+
+ memcpy(buf, info->super_copy, BTRFS_SUPER_INFO_SIZE);
+
+ disk_super = (struct btrfs_super_block *)buf;
+ dev_item = &disk_super->dev_item;
+
+ btrfs_set_stack_device_type(dev_item, type);
+ btrfs_set_stack_device_id(dev_item, devid);
+ btrfs_set_stack_device_total_bytes(dev_item, total_bytes);
+ btrfs_set_stack_device_bytes_used(dev_item, bytes_used);
+ btrfs_set_stack_device_io_align(dev_item, io_align);
+ btrfs_set_stack_device_io_width(dev_item, io_width);
+ btrfs_set_stack_device_sector_size(dev_item, sector_size);
+ memcpy(dev_item->uuid, dev_uuid, BTRFS_UUID_SIZE);
+ memcpy(dev_item->fsid, fs_uuid, BTRFS_UUID_SIZE);
+ csum_block((u8 *)buf, BTRFS_SUPER_INFO_SIZE);
+
+ ret = pwrite64(fp, buf, BTRFS_SUPER_INFO_SIZE, BTRFS_SUPER_INFO_OFFSET);
+ if (ret != BTRFS_SUPER_INFO_SIZE) {
+ ret = -EIO;
+ goto out;
+ }
+
+ write_backup_supers(fp, (u8 *)buf);
+
+out:
+ free(buf);
+ close(fp);
+ return 0;
+}
+
+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");
+ 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");
- exit(1);
+ 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");
+ exit(ret);
}
int main(int argc, char *argv[])
{
char *source;
char *target;
- int num_threads = 0;
- int compress_level = 0;
+ u64 num_threads = 1;
+ u64 compress_level = 0;
int create = 1;
int old_restore = 0;
int walk_trees = 0;
+ int multi_devices = 0;
int ret;
int sanitize = 0;
+ int dev_cnt = 0;
+ int usage_error = 0;
FILE *out;
while (1) {
- int c = getopt(argc, argv, "rc:t:osw");
+ static const struct option long_options[] = {
+ { "help", no_argument, NULL, GETOPT_VAL_HELP},
+ { NULL, 0, NULL, 0 }
+ };
+ int c = getopt_long(argc, argv, "rc:t:oswm", long_options, NULL);
if (c < 0)
break;
switch (c) {
create = 0;
break;
case 't':
- num_threads = atoi(optarg);
- if (num_threads <= 0 || num_threads > 32)
- print_usage();
+ num_threads = arg_strtou64(optarg);
+ if (num_threads > 32)
+ print_usage(1);
break;
case 'c':
- compress_level = atoi(optarg);
- if (compress_level < 0 || compress_level > 9)
- print_usage();
+ compress_level = arg_strtou64(optarg);
+ if (compress_level > 9)
+ print_usage(1);
break;
case 'o':
old_restore = 1;
case 'w':
walk_trees = 1;
break;
+ case 'm':
+ create = 0;
+ multi_devices = 1;
+ break;
+ case GETOPT_VAL_HELP:
default:
- print_usage();
+ print_usage(c != GETOPT_VAL_HELP);
}
}
- if (old_restore && create)
- print_usage();
-
argc = argc - optind;
- if (argc != 2)
- print_usage();
+ set_argv0(argv);
+ if (check_argc_min(argc, 2))
+ print_usage(1);
+
+ dev_cnt = argc - 1;
+
+ if (create) {
+ if (old_restore) {
+ fprintf(stderr, "Usage error: create and restore cannot be used at the same time\n");
+ usage_error++;
+ }
+ } else {
+ if (walk_trees || sanitize || compress_level) {
+ fprintf(stderr, "Usage error: use -w, -s, -c options for restore makes no sense\n");
+ usage_error++;
+ }
+ if (multi_devices && dev_cnt < 2) {
+ fprintf(stderr, "Usage error: not enough devices specified for -m option\n");
+ usage_error++;
+ }
+ if (!multi_devices && dev_cnt != 1) {
+ fprintf(stderr, "Usage error: accepts only 1 device without -m option\n");
+ usage_error++;
+ }
+ }
+
+ if (usage_error)
+ print_usage(1);
+
source = argv[optind];
target = argv[optind + 1];
}
}
- if (num_threads == 0 && compress_level > 0) {
+ if (num_threads == 1 && compress_level > 0) {
num_threads = sysconf(_SC_NPROCESSORS_ONLN);
if (num_threads <= 0)
num_threads = 1;
}
- if (create)
+ 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");
+
ret = create_metadump(source, out, num_threads,
compress_level, sanitize, walk_trees);
- else
- ret = restore_metadump(source, out, old_restore, 1);
+ } else {
+ ret = restore_metadump(source, out, old_restore, num_threads,
+ 0, target, multi_devices);
+ }
+ if (ret) {
+ printk("%s failed (%s)\n", (create) ? "create" : "restore",
+ strerror(errno));
+ goto out;
+ }
- if (out == stdout)
+ /* extended support for multiple devices */
+ if (!create && multi_devices) {
+ struct btrfs_fs_info *info;
+ u64 total_devs;
+ int i;
+
+ info = open_ctree_fs_info(target, 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));
+ 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",
+ total_devs, dev_cnt);
+ close_ctree(info->chunk_root);
+ goto out;
+ }
+
+ /* update super block on other disks */
+ for (i = 2; i <= dev_cnt; i++) {
+ ret = update_disk_super_on_device(info,
+ argv[optind + i], (u64)i);
+ if (ret) {
+ printk("update disk super failed devid=%d (error=%d)\n",
+ i, ret);
+ close_ctree(info->chunk_root);
+ exit(1);
+ }
+ }
+
+ close_ctree(info->chunk_root);
+
+ /* fix metadata block to map correct chunk */
+ ret = restore_metadump(source, out, 0, num_threads, 1,
+ target, 1);
+ if (ret) {
+ fprintf(stderr, "fix metadump failed (error=%d)\n",
+ ret);
+ exit(1);
+ }
+ }
+out:
+ if (out == stdout) {
fflush(out);
- else
+ } else {
fclose(out);
+ if (ret && create) {
+ int unlink_ret;
- return ret;
+ unlink_ret = unlink(target);
+ if (unlink_ret)
+ fprintf(stderr,
+ "unlink output file failed : %s\n",
+ strerror(errno));
+ }
+ }
+
+ return !!ret;
}
projects / platform / upstream / btrfs-progs.git / blobdiff