#include "dev-replace.h"
#include "sysfs.h"
+const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
+ [BTRFS_RAID_RAID10] = {
+ .sub_stripes = 2,
+ .dev_stripes = 1,
+ .devs_max = 0, /* 0 == as many as possible */
+ .devs_min = 4,
+ .tolerated_failures = 1,
+ .devs_increment = 2,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_RAID1] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 2,
+ .devs_min = 2,
+ .tolerated_failures = 1,
+ .devs_increment = 2,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_DUP] = {
+ .sub_stripes = 1,
+ .dev_stripes = 2,
+ .devs_max = 1,
+ .devs_min = 1,
+ .tolerated_failures = 0,
+ .devs_increment = 1,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_RAID0] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 0,
+ .devs_min = 2,
+ .tolerated_failures = 0,
+ .devs_increment = 1,
+ .ncopies = 1,
+ },
+ [BTRFS_RAID_SINGLE] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 1,
+ .devs_min = 1,
+ .tolerated_failures = 0,
+ .devs_increment = 1,
+ .ncopies = 1,
+ },
+ [BTRFS_RAID_RAID5] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 0,
+ .devs_min = 2,
+ .tolerated_failures = 1,
+ .devs_increment = 1,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_RAID6] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 0,
+ .devs_min = 3,
+ .tolerated_failures = 2,
+ .devs_increment = 1,
+ .ncopies = 3,
+ },
+};
+
+const u64 const btrfs_raid_group[BTRFS_NR_RAID_TYPES] = {
+ [BTRFS_RAID_RAID10] = BTRFS_BLOCK_GROUP_RAID10,
+ [BTRFS_RAID_RAID1] = BTRFS_BLOCK_GROUP_RAID1,
+ [BTRFS_RAID_DUP] = BTRFS_BLOCK_GROUP_DUP,
+ [BTRFS_RAID_RAID0] = BTRFS_BLOCK_GROUP_RAID0,
+ [BTRFS_RAID_SINGLE] = 0,
+ [BTRFS_RAID_RAID5] = BTRFS_BLOCK_GROUP_RAID5,
+ [BTRFS_RAID_RAID6] = BTRFS_BLOCK_GROUP_RAID6,
+};
+
static int init_first_rw_device(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_device *device);
spin_lock_init(&dev->reada_lock);
atomic_set(&dev->reada_in_flight, 0);
atomic_set(&dev->dev_stats_ccnt, 0);
- INIT_RADIX_TREE(&dev->reada_zones, GFP_NOFS & ~__GFP_WAIT);
- INIT_RADIX_TREE(&dev->reada_extents, GFP_NOFS & ~__GFP_WAIT);
+ INIT_RADIX_TREE(&dev->reada_zones, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
+ INIT_RADIX_TREE(&dev->reada_extents, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
return dev;
}
if (IS_ERR(*bdev)) {
ret = PTR_ERR(*bdev);
- printk(KERN_INFO "BTRFS: open %s failed\n", device_path);
goto error;
}
}
invalidate_bdev(*bdev);
*bh = btrfs_read_dev_super(*bdev);
- if (!*bh) {
- ret = -EINVAL;
+ if (IS_ERR(*bh)) {
+ ret = PTR_ERR(*bh);
blkdev_put(*bdev, flags);
goto error;
}
pending = pending->bi_next;
cur->bi_next = NULL;
+ /*
+ * atomic_dec_return implies a barrier for waitqueue_active
+ */
if (atomic_dec_return(&fs_info->nr_async_bios) < limit &&
waitqueue_active(&fs_info->async_submit_wait))
wake_up(&fs_info->async_submit_wait);
mutex_lock(&fs_devices->device_list_mutex);
list_for_each_entry_safe(device, tmp, &fs_devices->devices, dev_list) {
- struct btrfs_device *new_device;
- struct rcu_string *name;
-
- if (device->bdev)
- fs_devices->open_devices--;
-
- if (device->writeable &&
- device->devid != BTRFS_DEV_REPLACE_DEVID) {
- list_del_init(&device->dev_alloc_list);
- fs_devices->rw_devices--;
- }
-
- if (device->missing)
- fs_devices->missing_devices--;
-
- new_device = btrfs_alloc_device(NULL, &device->devid,
- device->uuid);
- BUG_ON(IS_ERR(new_device)); /* -ENOMEM */
-
- /* Safe because we are under uuid_mutex */
- if (device->name) {
- name = rcu_string_strdup(device->name->str, GFP_NOFS);
- BUG_ON(!name); /* -ENOMEM */
- rcu_assign_pointer(new_device->name, name);
- }
-
- list_replace_rcu(&device->dev_list, &new_device->dev_list);
- new_device->fs_devices = device->fs_devices;
-
- call_rcu(&device->rcu, free_device);
+ btrfs_close_one_device(device);
}
mutex_unlock(&fs_devices->device_list_mutex);
extent = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_dev_extent);
} else {
- btrfs_error(root->fs_info, ret, "Slot search failed");
+ btrfs_std_error(root->fs_info, ret, "Slot search failed");
goto out;
}
ret = btrfs_del_item(trans, root, path);
if (ret) {
- btrfs_error(root->fs_info, ret,
+ btrfs_std_error(root->fs_info, ret,
"Failed to remove dev extent item");
} else {
- trans->transaction->have_free_bgs = 1;
+ set_bit(BTRFS_TRANS_HAVE_FREE_BGS, &trans->transaction->flags);
}
out:
btrfs_free_path(path);
if (device->bdev) {
device->fs_devices->open_devices--;
/* remove sysfs entry */
- btrfs_kobj_rm_device(root->fs_info->fs_devices, device);
+ btrfs_sysfs_rm_device_link(root->fs_info->fs_devices, device);
}
call_rcu(&device->rcu, free_device);
if (srcdev->writeable) {
fs_devices->rw_devices--;
/* zero out the old super if it is writable */
- btrfs_scratch_superblock(srcdev);
+ btrfs_scratch_superblocks(srcdev->bdev,
+ rcu_str_deref(srcdev->name));
}
if (srcdev->bdev)
WARN_ON(!tgtdev);
mutex_lock(&fs_info->fs_devices->device_list_mutex);
- btrfs_kobj_rm_device(fs_info->fs_devices, tgtdev);
+ btrfs_sysfs_rm_device_link(fs_info->fs_devices, tgtdev);
if (tgtdev->bdev) {
- btrfs_scratch_superblock(tgtdev);
+ btrfs_scratch_superblocks(tgtdev->bdev,
+ rcu_str_deref(tgtdev->name));
fs_info->fs_devices->open_devices--;
}
fs_info->fs_devices->num_devices--;
}
}
- if (!*device) {
- btrfs_err(root->fs_info, "no missing device found");
- return -ENOENT;
- }
+ if (!*device)
+ return BTRFS_ERROR_DEV_MISSING_NOT_FOUND;
return 0;
} else {
tmp + 1);
/* add sysfs device entry */
- btrfs_kobj_add_device(root->fs_info->fs_devices, device);
+ btrfs_sysfs_add_device_link(root->fs_info->fs_devices, device);
/*
* we've got more storage, clear any full flags on the space
*/
snprintf(fsid_buf, BTRFS_UUID_UNPARSED_SIZE, "%pU",
root->fs_info->fsid);
- if (kobject_rename(&root->fs_info->fs_devices->super_kobj,
+ if (kobject_rename(&root->fs_info->fs_devices->fsid_kobj,
fsid_buf))
- pr_warn("BTRFS: sysfs: failed to create fsid for sprout\n");
+ btrfs_warn(root->fs_info,
+ "sysfs: failed to create fsid for sprout");
}
root->fs_info->num_tolerated_disk_barrier_failures =
ret = btrfs_relocate_sys_chunks(root);
if (ret < 0)
- btrfs_error(root->fs_info, ret,
+ btrfs_std_error(root->fs_info, ret,
"Failed to relocate sys chunks after "
"device initialization. This can be fixed "
"using the \"btrfs balance\" command.");
error_trans:
btrfs_end_transaction(trans, root);
rcu_string_free(device->name);
- btrfs_kobj_rm_device(root->fs_info->fs_devices, device);
+ btrfs_sysfs_rm_device_link(root->fs_info->fs_devices, device);
kfree(device);
error:
blkdev_put(bdev, FMODE_EXCL);
if (ret < 0)
goto out;
else if (ret > 0) { /* Logic error or corruption */
- btrfs_error(root->fs_info, -ENOENT,
+ btrfs_std_error(root->fs_info, -ENOENT,
"Failed lookup while freeing chunk.");
ret = -ENOENT;
goto out;
ret = btrfs_del_item(trans, root, path);
if (ret < 0)
- btrfs_error(root->fs_info, ret,
+ btrfs_std_error(root->fs_info, ret,
"Failed to delete chunk item.");
out:
btrfs_free_path(path);
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
- btrfs_std_error(root->fs_info, ret);
+ btrfs_std_error(root->fs_info, ret, NULL);
return ret;
}
* (albeit full) chunks.
*/
if (!(bctl->data.flags & BTRFS_BALANCE_ARGS_USAGE) &&
+ !(bctl->data.flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
!(bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT)) {
bctl->data.flags |= BTRFS_BALANCE_ARGS_USAGE;
bctl->data.usage = 90;
}
if (!(bctl->sys.flags & BTRFS_BALANCE_ARGS_USAGE) &&
+ !(bctl->sys.flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
!(bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT)) {
bctl->sys.flags |= BTRFS_BALANCE_ARGS_USAGE;
bctl->sys.usage = 90;
}
if (!(bctl->meta.flags & BTRFS_BALANCE_ARGS_USAGE) &&
+ !(bctl->meta.flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
!(bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT)) {
bctl->meta.flags |= BTRFS_BALANCE_ARGS_USAGE;
bctl->meta.usage = 90;
static int chunk_usage_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset,
struct btrfs_balance_args *bargs)
+{
+ struct btrfs_block_group_cache *cache;
+ u64 chunk_used;
+ u64 user_thresh_min;
+ u64 user_thresh_max;
+ int ret = 1;
+
+ cache = btrfs_lookup_block_group(fs_info, chunk_offset);
+ chunk_used = btrfs_block_group_used(&cache->item);
+
+ if (bargs->usage_min == 0)
+ user_thresh_min = 0;
+ else
+ user_thresh_min = div_factor_fine(cache->key.offset,
+ bargs->usage_min);
+
+ if (bargs->usage_max == 0)
+ user_thresh_max = 1;
+ else if (bargs->usage_max > 100)
+ user_thresh_max = cache->key.offset;
+ else
+ user_thresh_max = div_factor_fine(cache->key.offset,
+ bargs->usage_max);
+
+ if (user_thresh_min <= chunk_used && chunk_used < user_thresh_max)
+ ret = 0;
+
+ btrfs_put_block_group(cache);
+ return ret;
+}
+
+static int chunk_usage_range_filter(struct btrfs_fs_info *fs_info,
+ u64 chunk_offset, struct btrfs_balance_args *bargs)
{
struct btrfs_block_group_cache *cache;
u64 chunk_used, user_thresh;
cache = btrfs_lookup_block_group(fs_info, chunk_offset);
chunk_used = btrfs_block_group_used(&cache->item);
- if (bargs->usage == 0)
+ if (bargs->usage_min == 0)
user_thresh = 1;
else if (bargs->usage > 100)
user_thresh = cache->key.offset;
return 1;
}
+static int chunk_stripes_range_filter(struct extent_buffer *leaf,
+ struct btrfs_chunk *chunk,
+ struct btrfs_balance_args *bargs)
+{
+ int num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
+
+ if (bargs->stripes_min <= num_stripes
+ && num_stripes <= bargs->stripes_max)
+ return 0;
+
+ return 1;
+}
+
static int chunk_soft_convert_filter(u64 chunk_type,
struct btrfs_balance_args *bargs)
{
if ((bargs->flags & BTRFS_BALANCE_ARGS_USAGE) &&
chunk_usage_filter(bctl->fs_info, chunk_offset, bargs)) {
return 0;
+ } else if ((bargs->flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
+ chunk_usage_range_filter(bctl->fs_info, chunk_offset, bargs)) {
+ return 0;
}
/* devid filter */
return 0;
}
+ /* stripes filter */
+ if ((bargs->flags & BTRFS_BALANCE_ARGS_STRIPES_RANGE) &&
+ chunk_stripes_range_filter(leaf, chunk, bargs)) {
+ return 0;
+ }
+
/* soft profile changing mode */
if ((bargs->flags & BTRFS_BALANCE_ARGS_SOFT) &&
chunk_soft_convert_filter(chunk_type, bargs)) {
return 0;
else
bargs->limit--;
+ } else if ((bargs->flags & BTRFS_BALANCE_ARGS_LIMIT_RANGE)) {
+ /*
+ * Same logic as the 'limit' filter; the minimum cannot be
+ * determined here because we do not have the global informatoin
+ * about the count of all chunks that satisfy the filters.
+ */
+ if (bargs->limit_max == 0)
+ return 0;
+ else
+ bargs->limit_max--;
}
return 1;
struct btrfs_device *device;
u64 old_size;
u64 size_to_free;
+ u64 chunk_type;
struct btrfs_chunk *chunk;
struct btrfs_path *path;
struct btrfs_key key;
int ret;
int enospc_errors = 0;
bool counting = true;
+ /* The single value limit and min/max limits use the same bytes in the */
u64 limit_data = bctl->data.limit;
u64 limit_meta = bctl->meta.limit;
u64 limit_sys = bctl->sys.limit;
+ u32 count_data = 0;
+ u32 count_meta = 0;
+ u32 count_sys = 0;
+ int chunk_reserved = 0;
/* step one make some room on all the devices */
devices = &fs_info->fs_devices->devices;
spin_unlock(&fs_info->balance_lock);
again:
if (!counting) {
+ /*
+ * The single value limit and min/max limits use the same bytes
+ * in the
+ */
bctl->data.limit = limit_data;
bctl->meta.limit = limit_meta;
bctl->sys.limit = limit_sys;
}
chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
+ chunk_type = btrfs_chunk_type(leaf, chunk);
if (!counting) {
spin_lock(&fs_info->balance_lock);
ret = should_balance_chunk(chunk_root, leaf, chunk,
found_key.offset);
+
btrfs_release_path(path);
if (!ret) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
spin_lock(&fs_info->balance_lock);
bctl->stat.expected++;
spin_unlock(&fs_info->balance_lock);
+
+ if (chunk_type & BTRFS_BLOCK_GROUP_DATA)
+ count_data++;
+ else if (chunk_type & BTRFS_BLOCK_GROUP_SYSTEM)
+ count_sys++;
+ else if (chunk_type & BTRFS_BLOCK_GROUP_METADATA)
+ count_meta++;
+
goto loop;
}
+ /*
+ * Apply limit_min filter, no need to check if the LIMITS
+ * filter is used, limit_min is 0 by default
+ */
+ if (((chunk_type & BTRFS_BLOCK_GROUP_DATA) &&
+ count_data < bctl->data.limit_min)
+ || ((chunk_type & BTRFS_BLOCK_GROUP_METADATA) &&
+ count_meta < bctl->meta.limit_min)
+ || ((chunk_type & BTRFS_BLOCK_GROUP_SYSTEM) &&
+ count_sys < bctl->sys.limit_min)) {
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
+ goto loop;
+ }
+
+ if ((chunk_type & BTRFS_BLOCK_GROUP_DATA) && !chunk_reserved) {
+ trans = btrfs_start_transaction(chunk_root, 0);
+ if (IS_ERR(trans)) {
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
+ ret = PTR_ERR(trans);
+ goto error;
+ }
+
+ ret = btrfs_force_chunk_alloc(trans, chunk_root,
+ BTRFS_BLOCK_GROUP_DATA);
+ if (ret < 0) {
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
+ goto error;
+ }
+
+ btrfs_end_transaction(trans, chunk_root);
+ chunk_reserved = 1;
+ }
+
ret = btrfs_relocate_chunk(chunk_root,
found_key.offset);
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
unset_balance_control(fs_info);
ret = del_balance_item(fs_info->tree_root);
if (ret)
- btrfs_std_error(fs_info, ret);
+ btrfs_std_error(fs_info, ret, NULL);
atomic_set(&fs_info->mutually_exclusive_operation_running, 0);
}
+/* Non-zero return value signifies invalidity */
+static inline int validate_convert_profile(struct btrfs_balance_args *bctl_arg,
+ u64 allowed)
+{
+ return ((bctl_arg->flags & BTRFS_BALANCE_ARGS_CONVERT) &&
+ (!alloc_profile_is_valid(bctl_arg->target, 1) ||
+ (bctl_arg->target & ~allowed)));
+}
+
/*
* Should be called with both balance and volume mutexes held
*/
if (num_devices > 3)
allowed |= (BTRFS_BLOCK_GROUP_RAID10 |
BTRFS_BLOCK_GROUP_RAID6);
- if ((bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
- (!alloc_profile_is_valid(bctl->data.target, 1) ||
- (bctl->data.target & ~allowed))) {
+ if (validate_convert_profile(&bctl->data, allowed)) {
btrfs_err(fs_info, "unable to start balance with target "
"data profile %llu",
bctl->data.target);
ret = -EINVAL;
goto out;
}
- if ((bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
- (!alloc_profile_is_valid(bctl->meta.target, 1) ||
- (bctl->meta.target & ~allowed))) {
+ if (validate_convert_profile(&bctl->meta, allowed)) {
btrfs_err(fs_info,
"unable to start balance with target metadata profile %llu",
bctl->meta.target);
ret = -EINVAL;
goto out;
}
- if ((bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
- (!alloc_profile_is_valid(bctl->sys.target, 1) ||
- (bctl->sys.target & ~allowed))) {
+ if (validate_convert_profile(&bctl->sys, allowed)) {
btrfs_err(fs_info,
"unable to start balance with target system profile %llu",
bctl->sys.target);
return 0;
}
-static const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
- [BTRFS_RAID_RAID10] = {
- .sub_stripes = 2,
- .dev_stripes = 1,
- .devs_max = 0, /* 0 == as many as possible */
- .devs_min = 4,
- .devs_increment = 2,
- .ncopies = 2,
- },
- [BTRFS_RAID_RAID1] = {
- .sub_stripes = 1,
- .dev_stripes = 1,
- .devs_max = 2,
- .devs_min = 2,
- .devs_increment = 2,
- .ncopies = 2,
- },
- [BTRFS_RAID_DUP] = {
- .sub_stripes = 1,
- .dev_stripes = 2,
- .devs_max = 1,
- .devs_min = 1,
- .devs_increment = 1,
- .ncopies = 2,
- },
- [BTRFS_RAID_RAID0] = {
- .sub_stripes = 1,
- .dev_stripes = 1,
- .devs_max = 0,
- .devs_min = 2,
- .devs_increment = 1,
- .ncopies = 1,
- },
- [BTRFS_RAID_SINGLE] = {
- .sub_stripes = 1,
- .dev_stripes = 1,
- .devs_max = 1,
- .devs_min = 1,
- .devs_increment = 1,
- .ncopies = 1,
- },
- [BTRFS_RAID_RAID5] = {
- .sub_stripes = 1,
- .dev_stripes = 1,
- .devs_max = 0,
- .devs_min = 2,
- .devs_increment = 1,
- .ncopies = 2,
- },
- [BTRFS_RAID_RAID6] = {
- .sub_stripes = 1,
- .dev_stripes = 1,
- .devs_max = 0,
- .devs_min = 3,
- .devs_increment = 1,
- .ncopies = 3,
- },
-};
-
static u32 find_raid56_stripe_len(u32 data_devices, u32 dev_stripe_target)
{
/* TODO allow them to set a preferred stripe size */
BUG_ON(!path);
ret = btrfs_search_slot(trans, dev_root, &key, path, -1, 1);
if (ret < 0) {
- printk_in_rcu(KERN_WARNING "BTRFS: "
- "error %d while searching for dev_stats item for device %s!\n",
+ btrfs_warn_in_rcu(dev_root->fs_info,
+ "error %d while searching for dev_stats item for device %s",
ret, rcu_str_deref(device->name));
goto out;
}
/* need to delete old one and insert a new one */
ret = btrfs_del_item(trans, dev_root, path);
if (ret != 0) {
- printk_in_rcu(KERN_WARNING "BTRFS: "
- "delete too small dev_stats item for device %s failed %d!\n",
+ btrfs_warn_in_rcu(dev_root->fs_info,
+ "delete too small dev_stats item for device %s failed %d",
rcu_str_deref(device->name), ret);
goto out;
}
ret = btrfs_insert_empty_item(trans, dev_root, path,
&key, sizeof(*ptr));
if (ret < 0) {
- printk_in_rcu(KERN_WARNING "BTRFS: "
- "insert dev_stats item for device %s failed %d!\n",
- rcu_str_deref(device->name), ret);
+ btrfs_warn_in_rcu(dev_root->fs_info,
+ "insert dev_stats item for device %s failed %d",
+ rcu_str_deref(device->name), ret);
goto out;
}
}
{
if (!dev->dev_stats_valid)
return;
- printk_ratelimited_in_rcu(KERN_ERR "BTRFS: "
- "bdev %s errs: wr %u, rd %u, flush %u, corrupt %u, gen %u\n",
+ btrfs_err_rl_in_rcu(dev->dev_root->fs_info,
+ "bdev %s errs: wr %u, rd %u, flush %u, corrupt %u, gen %u",
rcu_str_deref(dev->name),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_WRITE_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_READ_ERRS),
if (i == BTRFS_DEV_STAT_VALUES_MAX)
return; /* all values == 0, suppress message */
- printk_in_rcu(KERN_INFO "BTRFS: "
- "bdev %s errs: wr %u, rd %u, flush %u, corrupt %u, gen %u\n",
+ btrfs_info_in_rcu(dev->dev_root->fs_info,
+ "bdev %s errs: wr %u, rd %u, flush %u, corrupt %u, gen %u",
rcu_str_deref(dev->name),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_WRITE_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_READ_ERRS),
return 0;
}
-int btrfs_scratch_superblock(struct btrfs_device *device)
+void btrfs_scratch_superblocks(struct block_device *bdev, char *device_path)
{
struct buffer_head *bh;
struct btrfs_super_block *disk_super;
+ int copy_num;
- bh = btrfs_read_dev_super(device->bdev);
- if (!bh)
- return -EINVAL;
- disk_super = (struct btrfs_super_block *)bh->b_data;
+ if (!bdev)
+ return;
- memset(&disk_super->magic, 0, sizeof(disk_super->magic));
- set_buffer_dirty(bh);
- sync_dirty_buffer(bh);
- brelse(bh);
+ for (copy_num = 0; copy_num < BTRFS_SUPER_MIRROR_MAX;
+ copy_num++) {
- return 0;
+ if (btrfs_read_dev_one_super(bdev, copy_num, &bh))
+ continue;
+
+ disk_super = (struct btrfs_super_block *)bh->b_data;
+
+ memset(&disk_super->magic, 0, sizeof(disk_super->magic));
+ set_buffer_dirty(bh);
+ sync_dirty_buffer(bh);
+ brelse(bh);
+ }
+
+ /* Notify udev that device has changed */
+ btrfs_kobject_uevent(bdev, KOBJ_CHANGE);
+
+ /* Update ctime/mtime for device path for libblkid */
+ update_dev_time(device_path);
}
/*
fs_devices = fs_devices->seed;
}
}
+
+void btrfs_close_one_device(struct btrfs_device *device)
+{
+ struct btrfs_fs_devices *fs_devices = device->fs_devices;
+ struct btrfs_device *new_device;
+ struct rcu_string *name;
+
+ if (device->bdev)
+ fs_devices->open_devices--;
+
+ if (device->writeable &&
+ device->devid != BTRFS_DEV_REPLACE_DEVID) {
+ list_del_init(&device->dev_alloc_list);
+ fs_devices->rw_devices--;
+ }
+
+ if (device->missing)
+ fs_devices->missing_devices--;
+
+ new_device = btrfs_alloc_device(NULL, &device->devid,
+ device->uuid);
+ BUG_ON(IS_ERR(new_device)); /* -ENOMEM */
+
+ /* Safe because we are under uuid_mutex */
+ if (device->name) {
+ name = rcu_string_strdup(device->name->str, GFP_NOFS);
+ BUG_ON(!name); /* -ENOMEM */
+ rcu_assign_pointer(new_device->name, name);
+ }
+
+ list_replace_rcu(&device->dev_list, &new_device->dev_list);
+ new_device->fs_devices = device->fs_devices;
+
+ call_rcu(&device->rcu, free_device);
+}
projects / firefly-linux-kernel-4.4.55.git / blobdiff