#include <linux/slab.h>
#include <linux/buffer_head.h>
#include <linux/blkdev.h>
-#include <linux/iocontext.h>
-#include <linux/capability.h>
#include <linux/ratelimit.h>
#include <linux/kthread.h>
#include <linux/raid/pq.h>
#include <linux/semaphore.h>
#include <linux/uuid.h>
#include <linux/list_sort.h>
-#include <asm/div64.h>
#include "ctree.h"
#include "extent_map.h"
#include "disk-io.h"
* devices.
*/
static void btrfs_free_stale_devices(const char *path,
- struct btrfs_device *skip_dev)
+ struct btrfs_device *skip_device)
{
- struct btrfs_fs_devices *fs_devs, *tmp_fs_devs;
- struct btrfs_device *dev, *tmp_dev;
+ struct btrfs_fs_devices *fs_devices, *tmp_fs_devices;
+ struct btrfs_device *device, *tmp_device;
- list_for_each_entry_safe(fs_devs, tmp_fs_devs, &fs_uuids, fs_list) {
-
- if (fs_devs->opened)
+ list_for_each_entry_safe(fs_devices, tmp_fs_devices, &fs_uuids, fs_list) {
+ mutex_lock(&fs_devices->device_list_mutex);
+ if (fs_devices->opened) {
+ mutex_unlock(&fs_devices->device_list_mutex);
continue;
+ }
- list_for_each_entry_safe(dev, tmp_dev,
- &fs_devs->devices, dev_list) {
+ list_for_each_entry_safe(device, tmp_device,
+ &fs_devices->devices, dev_list) {
int not_found = 0;
- if (skip_dev && skip_dev == dev)
+ if (skip_device && skip_device == device)
continue;
- if (path && !dev->name)
+ if (path && !device->name)
continue;
rcu_read_lock();
if (path)
- not_found = strcmp(rcu_str_deref(dev->name),
+ not_found = strcmp(rcu_str_deref(device->name),
path);
rcu_read_unlock();
if (not_found)
continue;
/* delete the stale device */
- if (fs_devs->num_devices == 1) {
- btrfs_sysfs_remove_fsid(fs_devs);
- list_del(&fs_devs->fs_list);
- free_fs_devices(fs_devs);
+ fs_devices->num_devices--;
+ list_del(&device->dev_list);
+ btrfs_free_device(device);
+
+ if (fs_devices->num_devices == 0)
break;
- } else {
- fs_devs->num_devices--;
- list_del(&dev->dev_list);
- btrfs_free_device(dev);
- }
+ }
+ mutex_unlock(&fs_devices->device_list_mutex);
+ if (fs_devices->num_devices == 0) {
+ btrfs_sysfs_remove_fsid(fs_devices);
+ list_del(&fs_devices->fs_list);
+ free_fs_devices(fs_devices);
}
}
}
* error pointer when failed
*/
static noinline struct btrfs_device *device_list_add(const char *path,
- struct btrfs_super_block *disk_super)
+ struct btrfs_super_block *disk_super,
+ bool *new_device_added)
{
struct btrfs_device *device;
struct btrfs_fs_devices *fs_devices;
if (IS_ERR(fs_devices))
return ERR_CAST(fs_devices);
+ mutex_lock(&fs_devices->device_list_mutex);
list_add(&fs_devices->fs_list, &fs_uuids);
device = NULL;
} else {
+ mutex_lock(&fs_devices->device_list_mutex);
device = find_device(fs_devices, devid,
disk_super->dev_item.uuid);
}
if (!device) {
- if (fs_devices->opened)
+ if (fs_devices->opened) {
+ mutex_unlock(&fs_devices->device_list_mutex);
return ERR_PTR(-EBUSY);
+ }
device = btrfs_alloc_device(NULL, &devid,
disk_super->dev_item.uuid);
if (IS_ERR(device)) {
+ mutex_unlock(&fs_devices->device_list_mutex);
/* we can safely leave the fs_devices entry around */
return device;
}
name = rcu_string_strdup(path, GFP_NOFS);
if (!name) {
btrfs_free_device(device);
+ mutex_unlock(&fs_devices->device_list_mutex);
return ERR_PTR(-ENOMEM);
}
rcu_assign_pointer(device->name, name);
- mutex_lock(&fs_devices->device_list_mutex);
list_add_rcu(&device->dev_list, &fs_devices->devices);
fs_devices->num_devices++;
- mutex_unlock(&fs_devices->device_list_mutex);
device->fs_devices = fs_devices;
- btrfs_free_stale_devices(path, device);
+ *new_device_added = true;
if (disk_super->label[0])
pr_info("BTRFS: device label %s devid %llu transid %llu %s\n",
* with larger generation number or the last-in if
* generation are equal.
*/
+ mutex_unlock(&fs_devices->device_list_mutex);
return ERR_PTR(-EEXIST);
}
name = rcu_string_strdup(path, GFP_NOFS);
- if (!name)
+ if (!name) {
+ mutex_unlock(&fs_devices->device_list_mutex);
return ERR_PTR(-ENOMEM);
+ }
rcu_string_free(device->name);
rcu_assign_pointer(device->name, name);
if (test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state)) {
fs_devices->total_devices = btrfs_super_num_devices(disk_super);
+ mutex_unlock(&fs_devices->device_list_mutex);
return device;
}
blkdev_put(device->bdev, device->mode);
}
-static void btrfs_prepare_close_one_device(struct btrfs_device *device)
+static void btrfs_close_one_device(struct btrfs_device *device)
{
struct btrfs_fs_devices *fs_devices = device->fs_devices;
struct btrfs_device *new_device;
if (test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state))
fs_devices->missing_devices--;
+ btrfs_close_bdev(device);
+
new_device = btrfs_alloc_device(NULL, &device->devid,
device->uuid);
BUG_ON(IS_ERR(new_device)); /* -ENOMEM */
list_replace_rcu(&device->dev_list, &new_device->dev_list);
new_device->fs_devices = device->fs_devices;
+
+ call_rcu(&device->rcu, free_device_rcu);
}
static int close_fs_devices(struct btrfs_fs_devices *fs_devices)
{
struct btrfs_device *device, *tmp;
- struct list_head pending_put;
-
- INIT_LIST_HEAD(&pending_put);
if (--fs_devices->opened > 0)
return 0;
mutex_lock(&fs_devices->device_list_mutex);
list_for_each_entry_safe(device, tmp, &fs_devices->devices, dev_list) {
- btrfs_prepare_close_one_device(device);
- list_add(&device->dev_list, &pending_put);
+ btrfs_close_one_device(device);
}
mutex_unlock(&fs_devices->device_list_mutex);
- /*
- * btrfs_show_devname() is using the device_list_mutex,
- * sometimes call to blkdev_put() leads vfs calling
- * into this func. So do put outside of device_list_mutex,
- * as of now.
- */
- while (!list_empty(&pending_put)) {
- device = list_first_entry(&pending_put,
- struct btrfs_device, dev_list);
- list_del(&device->dev_list);
- btrfs_close_bdev(device);
- call_rcu(&device->rcu, free_device_rcu);
- }
-
WARN_ON(fs_devices->open_devices);
WARN_ON(fs_devices->rw_devices);
fs_devices->opened = 0;
{
int ret;
- mutex_lock(&uuid_mutex);
+ lockdep_assert_held(&uuid_mutex);
+
mutex_lock(&fs_devices->device_list_mutex);
if (fs_devices->opened) {
fs_devices->opened++;
ret = open_fs_devices(fs_devices, flags, holder);
}
mutex_unlock(&fs_devices->device_list_mutex);
- mutex_unlock(&uuid_mutex);
return ret;
}
* and we are not allowed to call set_blocksize during the scan. The superblock
* is read via pagecache
*/
-int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
- struct btrfs_fs_devices **fs_devices_ret)
+struct btrfs_device *btrfs_scan_one_device(const char *path, fmode_t flags,
+ void *holder)
{
struct btrfs_super_block *disk_super;
- struct btrfs_device *device;
+ bool new_device_added = false;
+ struct btrfs_device *device = NULL;
struct block_device *bdev;
struct page *page;
- int ret = 0;
u64 bytenr;
+ lockdep_assert_held(&uuid_mutex);
+
/*
* we would like to check all the supers, but that would make
* a btrfs mount succeed after a mkfs from a different FS.
bdev = blkdev_get_by_path(path, flags, holder);
if (IS_ERR(bdev))
- return PTR_ERR(bdev);
+ return ERR_CAST(bdev);
if (btrfs_read_disk_super(bdev, bytenr, &page, &disk_super)) {
- ret = -EINVAL;
+ device = ERR_PTR(-EINVAL);
goto error_bdev_put;
}
- mutex_lock(&uuid_mutex);
- device = device_list_add(path, disk_super);
- if (IS_ERR(device))
- ret = PTR_ERR(device);
- else
- *fs_devices_ret = device->fs_devices;
- mutex_unlock(&uuid_mutex);
+ device = device_list_add(path, disk_super, &new_device_added);
+ if (!IS_ERR(device)) {
+ if (new_device_added)
+ btrfs_free_stale_devices(path, device);
+ }
btrfs_release_disk_super(page);
error_bdev_put:
blkdev_put(bdev, flags);
- return ret;
-}
-
-/* helper to account the used device space in the range */
-int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
- u64 end, u64 *length)
-{
- struct btrfs_key key;
- struct btrfs_root *root = device->fs_info->dev_root;
- struct btrfs_dev_extent *dev_extent;
- struct btrfs_path *path;
- u64 extent_end;
- int ret;
- int slot;
- struct extent_buffer *l;
-
- *length = 0;
-
- if (start >= device->total_bytes ||
- test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state))
- return 0;
-
- path = btrfs_alloc_path();
- if (!path)
- return -ENOMEM;
- path->reada = READA_FORWARD;
-
- key.objectid = device->devid;
- key.offset = start;
- key.type = BTRFS_DEV_EXTENT_KEY;
-
- ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
- if (ret < 0)
- goto out;
- if (ret > 0) {
- ret = btrfs_previous_item(root, path, key.objectid, key.type);
- if (ret < 0)
- goto out;
- }
-
- while (1) {
- l = path->nodes[0];
- slot = path->slots[0];
- if (slot >= btrfs_header_nritems(l)) {
- ret = btrfs_next_leaf(root, path);
- if (ret == 0)
- continue;
- if (ret < 0)
- goto out;
-
- break;
- }
- btrfs_item_key_to_cpu(l, &key, slot);
-
- if (key.objectid < device->devid)
- goto next;
-
- if (key.objectid > device->devid)
- break;
-
- if (key.type != BTRFS_DEV_EXTENT_KEY)
- goto next;
-
- dev_extent = btrfs_item_ptr(l, slot, struct btrfs_dev_extent);
- extent_end = key.offset + btrfs_dev_extent_length(l,
- dev_extent);
- if (key.offset <= start && extent_end > end) {
- *length = end - start + 1;
- break;
- } else if (key.offset <= start && extent_end > start)
- *length += extent_end - start;
- else if (key.offset > start && extent_end <= end)
- *length += extent_end - key.offset;
- else if (key.offset > start && key.offset <= end) {
- *length += end - key.offset + 1;
- break;
- } else if (key.offset > end)
- break;
-
-next:
- path->slots[0]++;
- }
- ret = 0;
-out:
- btrfs_free_path(path);
- return ret;
+ return device;
}
static int contains_pending_extent(struct btrfs_transaction *transaction,
cur_devices->num_devices--;
cur_devices->total_devices--;
+ /* Update total_devices of the parent fs_devices if it's seed */
+ if (cur_devices != fs_devices)
+ fs_devices->total_devices--;
if (test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state))
cur_devices->missing_devices--;
INIT_LIST_HEAD(&seed_devices->alloc_list);
mutex_init(&seed_devices->device_list_mutex);
- mutex_lock(&fs_info->fs_devices->device_list_mutex);
+ mutex_lock(&fs_devices->device_list_mutex);
list_splice_init_rcu(&fs_devices->devices, &seed_devices->devices,
synchronize_rcu);
list_for_each_entry(device, &seed_devices->devices, dev_list)
generate_random_uuid(fs_devices->fsid);
memcpy(fs_info->fsid, fs_devices->fsid, BTRFS_FSID_SIZE);
memcpy(disk_super->fsid, fs_devices->fsid, BTRFS_FSID_SIZE);
- mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+ mutex_unlock(&fs_devices->device_list_mutex);
super_flags = btrfs_super_flags(disk_super) &
~BTRFS_SUPER_FLAG_SEEDING;
struct btrfs_trans_handle *trans;
struct btrfs_device *device;
struct block_device *bdev;
- struct list_head *devices;
struct super_block *sb = fs_info->sb;
struct rcu_string *name;
+ struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
u64 tmp;
int seeding_dev = 0;
int ret = 0;
bool unlocked = false;
- if (sb_rdonly(sb) && !fs_info->fs_devices->seeding)
+ if (sb_rdonly(sb) && !fs_devices->seeding)
return -EROFS;
bdev = blkdev_get_by_path(device_path, FMODE_WRITE | FMODE_EXCL,
if (IS_ERR(bdev))
return PTR_ERR(bdev);
- if (fs_info->fs_devices->seeding) {
+ if (fs_devices->seeding) {
seeding_dev = 1;
down_write(&sb->s_umount);
mutex_lock(&uuid_mutex);
filemap_write_and_wait(bdev->bd_inode->i_mapping);
- devices = &fs_info->fs_devices->devices;
-
- mutex_lock(&fs_info->fs_devices->device_list_mutex);
- list_for_each_entry(device, devices, dev_list) {
+ mutex_lock(&fs_devices->device_list_mutex);
+ list_for_each_entry(device, &fs_devices->devices, dev_list) {
if (device->bdev == bdev) {
ret = -EEXIST;
mutex_unlock(
- &fs_info->fs_devices->device_list_mutex);
+ &fs_devices->device_list_mutex);
goto error;
}
}
- mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+ mutex_unlock(&fs_devices->device_list_mutex);
device = btrfs_alloc_device(fs_info, NULL, NULL);
if (IS_ERR(device)) {
}
}
- device->fs_devices = fs_info->fs_devices;
+ device->fs_devices = fs_devices;
- mutex_lock(&fs_info->fs_devices->device_list_mutex);
+ mutex_lock(&fs_devices->device_list_mutex);
mutex_lock(&fs_info->chunk_mutex);
- list_add_rcu(&device->dev_list, &fs_info->fs_devices->devices);
- list_add(&device->dev_alloc_list,
- &fs_info->fs_devices->alloc_list);
- fs_info->fs_devices->num_devices++;
- fs_info->fs_devices->open_devices++;
- fs_info->fs_devices->rw_devices++;
- fs_info->fs_devices->total_devices++;
- fs_info->fs_devices->total_rw_bytes += device->total_bytes;
+ list_add_rcu(&device->dev_list, &fs_devices->devices);
+ list_add(&device->dev_alloc_list, &fs_devices->alloc_list);
+ fs_devices->num_devices++;
+ fs_devices->open_devices++;
+ fs_devices->rw_devices++;
+ fs_devices->total_devices++;
+ fs_devices->total_rw_bytes += device->total_bytes;
atomic64_add(device->total_bytes, &fs_info->free_chunk_space);
if (!blk_queue_nonrot(q))
- fs_info->fs_devices->rotating = 1;
+ fs_devices->rotating = 1;
tmp = btrfs_super_total_bytes(fs_info->super_copy);
btrfs_set_super_total_bytes(fs_info->super_copy,
btrfs_set_super_num_devices(fs_info->super_copy, tmp + 1);
/* add sysfs device entry */
- btrfs_sysfs_add_device_link(fs_info->fs_devices, device);
+ btrfs_sysfs_add_device_link(fs_devices, device);
/*
* we've got more storage, clear any full flags on the space
btrfs_clear_space_info_full(fs_info);
mutex_unlock(&fs_info->chunk_mutex);
- mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+ mutex_unlock(&fs_devices->device_list_mutex);
if (seeding_dev) {
mutex_lock(&fs_info->chunk_mutex);
*/
snprintf(fsid_buf, BTRFS_UUID_UNPARSED_SIZE, "%pU",
fs_info->fsid);
- if (kobject_rename(&fs_info->fs_devices->fsid_kobj, fsid_buf))
+ if (kobject_rename(&fs_devices->fsid_kobj, fsid_buf))
btrfs_warn(fs_info,
"sysfs: failed to create fsid for sprout");
}
return ret;
error_sysfs:
- btrfs_sysfs_rm_device_link(fs_info->fs_devices, device);
+ btrfs_sysfs_rm_device_link(fs_devices, device);
error_trans:
if (seeding_dev)
sb->s_flags |= SB_RDONLY;
}
map = em->map_lookup;
mutex_lock(&fs_info->chunk_mutex);
- check_system_chunk(trans, fs_info, map->type);
+ check_system_chunk(trans, map->type);
mutex_unlock(&fs_info->chunk_mutex);
/*
}
}
- ret = btrfs_remove_block_group(trans, fs_info, chunk_offset, em);
+ ret = btrfs_remove_block_group(trans, chunk_offset, em);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto out;
if (IS_ERR(trans))
return PTR_ERR(trans);
- ret = btrfs_force_chunk_alloc(trans, fs_info,
+ ret = btrfs_force_chunk_alloc(trans,
BTRFS_BLOCK_GROUP_DATA);
btrfs_end_transaction(trans);
if (ret < 0)
if (type & BTRFS_BLOCK_GROUP_DATA) {
max_stripe_size = SZ_1G;
- max_chunk_size = 10 * max_stripe_size;
+ max_chunk_size = BTRFS_MAX_DATA_CHUNK_SIZE;
if (!devs_max)
devs_max = BTRFS_MAX_DEVS(info);
} else if (type & BTRFS_BLOCK_GROUP_METADATA) {
refcount_inc(&em->refs);
write_unlock(&em_tree->lock);
- ret = btrfs_make_block_group(trans, info, 0, type, start, num_bytes);
+ ret = btrfs_make_block_group(trans, 0, type, start, num_bytes);
if (ret)
goto error_del_extent;
* require modifying the chunk tree. This division is important for the
* bootstrap process of adding storage to a seed btrfs.
*/
-int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info, u64 type)
+int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, u64 type)
{
u64 chunk_offset;
- lockdep_assert_held(&fs_info->chunk_mutex);
- chunk_offset = find_next_chunk(fs_info);
+ lockdep_assert_held(&trans->fs_info->chunk_mutex);
+ chunk_offset = find_next_chunk(trans->fs_info);
return __btrfs_alloc_chunk(trans, chunk_offset, type);
}
/*
* There could be two corrupted data stripes, we need
* to loop retry in order to rebuild the correct data.
- *
+ *
* Fail a stripe at a time on every retry except the
* stripe under reconstruction.
*/
u16 num_stripes;
u16 sub_stripes;
u64 type;
+ u64 features;
+ bool mixed = false;
length = btrfs_chunk_length(leaf, chunk);
stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
btrfs_chunk_type(leaf, chunk));
return -EIO;
}
+
+ if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) {
+ btrfs_err(fs_info, "missing chunk type flag: 0x%llx", type);
+ return -EIO;
+ }
+
+ if ((type & BTRFS_BLOCK_GROUP_SYSTEM) &&
+ (type & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA))) {
+ btrfs_err(fs_info,
+ "system chunk with data or metadata type: 0x%llx", type);
+ return -EIO;
+ }
+
+ features = btrfs_super_incompat_flags(fs_info->super_copy);
+ if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
+ mixed = true;
+
+ if (!mixed) {
+ if ((type & BTRFS_BLOCK_GROUP_METADATA) &&
+ (type & BTRFS_BLOCK_GROUP_DATA)) {
+ btrfs_err(fs_info,
+ "mixed chunk type in non-mixed mode: 0x%llx", type);
+ return -EIO;
+ }
+ }
+
if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
(type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes < 1) ||
(type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
fs_devices = fs_devices->seed;
}
}
+
+/*
+ * Multiplicity factor for simple profiles: DUP, RAID1-like and RAID10.
+ */
+int btrfs_bg_type_to_factor(u64 flags)
+{
+ if (flags & (BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1 |
+ BTRFS_BLOCK_GROUP_RAID10))
+ return 2;
+ return 1;
+}
git.samba.org / sfrench / cifs-2.6.git / blobdiff