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;
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;
}
struct btrfs_device, dev_list);
if (device->fd != -1) {
if (fsync(device->fd) == -1) {
- warning("fsync on device %llu failed: %s",
- device->devid, strerror(errno));
+ warning("fsync on device %llu failed: %m",
+ device->devid);
ret = -errno;
}
if (posix_fadvise(device->fd, 0, 0, POSIX_FADV_DONTNEED))
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;
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;
}
* 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;
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)
{
/* 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, NULL);
}
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;
* 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);
if (ret)
goto err;
}
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,
(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;
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(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;
}
/*
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);
return -EIO;
}
if (btrfs_chunk_sector_size(leaf, chunk) != sectorsize) {
- error("invalid chunk sectorsize %llu",
+ error("invalid chunk sectorsize %llu",
(unsigned long long)btrfs_chunk_sector_size(leaf, chunk));
return -EIO;
}
}
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;
+}