UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

Merge branch 'bug-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-work 

Conflicts:
	fs/btrfs/extent-tree.c

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2010-10-29 09:27:49 -04:00
parent 8216ef866d e9bb7f10d3
commit 6b5b817f10
7 changed files with 298 additions and 183 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
fs/btrfs/ctree.h
View File

@ -698,7 +698,8 @@ struct btrfs_block_group_item {
struct btrfs_space_info {
u64 flags;
u64 total_bytes; /* total bytes in the space */
u64 total_bytes; /* total bytes in the space,
this doesn't take mirrors into account */
u64 bytes_used; /* total bytes used,
this does't take mirrors into account */
u64 bytes_pinned; /* total bytes pinned, will be freed when the
@ -710,6 +711,8 @@ struct btrfs_space_info {
u64 bytes_may_use; /* number of bytes that may be used for
delalloc/allocations */
u64 disk_used; /* total bytes used on disk */
u64 disk_total; /* total bytes on disk, takes mirrors into
account */
int full; /* indicates that we cannot allocate any more
chunks for this space */
@ -2146,7 +2149,7 @@ int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
int num_items, int *retries);
int num_items);
void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
@ -2167,7 +2170,7 @@ void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,
u64 num_bytes, int *retries);
u64 num_bytes);
int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,
@ -2441,7 +2444,8 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
u32 min_type);
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput);
int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput,
int sync);
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
struct extent_state **cached_state);
int btrfs_writepages(struct address_space *mapping,

308
fs/btrfs/extent-tree.c
View File

@ -2976,6 +2976,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
if (found) {
spin_lock(&found->lock);
found->total_bytes += total_bytes;
found->disk_total += total_bytes * factor;
found->bytes_used += bytes_used;
found->disk_used += bytes_used * factor;
found->full = 0;
@ -2995,6 +2996,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
BTRFS_BLOCK_GROUP_SYSTEM |
BTRFS_BLOCK_GROUP_METADATA);
found->total_bytes = total_bytes;
found->disk_total = total_bytes * factor;
found->bytes_used = bytes_used;
found->disk_used = bytes_used * factor;
found->bytes_pinned = 0;
@ -3216,8 +3218,7 @@ static void force_metadata_allocation(struct btrfs_fs_info *info)
rcu_read_unlock();
}
static int should_alloc_chunk(struct btrfs_space_info *sinfo,
u64 alloc_bytes)
static int should_alloc_chunk(struct btrfs_space_info *sinfo, u64 alloc_bytes)
{
u64 num_bytes = sinfo->total_bytes - sinfo->bytes_readonly;
@ -3229,6 +3230,10 @@ static int should_alloc_chunk(struct btrfs_space_info *sinfo,
alloc_bytes < div_factor(num_bytes, 8))
return 0;
if (num_bytes > 256 * 1024 * 1024 &&
sinfo->bytes_used < div_factor(num_bytes, 3))
return 0;
return 1;
}
@ -3298,55 +3303,26 @@ out:
return ret;
}
static int maybe_allocate_chunk(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_space_info *sinfo, u64 num_bytes)
{
int ret;
int end_trans = 0;
if (sinfo->full)
return 0;
spin_lock(&sinfo->lock);
ret = should_alloc_chunk(sinfo, num_bytes + 2 * 1024 * 1024);
spin_unlock(&sinfo->lock);
if (!ret)
return 0;
if (!trans) {
trans = btrfs_join_transaction(root, 1);
BUG_ON(IS_ERR(trans));
end_trans = 1;
}
ret = do_chunk_alloc(trans, root->fs_info->extent_root,
num_bytes + 2 * 1024 * 1024,
get_alloc_profile(root, sinfo->flags), 0);
if (end_trans)
btrfs_end_transaction(trans, root);
return ret == 1 ? 1 : 0;
}
/*
* shrink metadata reservation for delalloc
*/
static int shrink_delalloc(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 to_reclaim)
struct btrfs_root *root, u64 to_reclaim, int sync)
{
struct btrfs_block_rsv *block_rsv;
struct btrfs_space_info *space_info;
u64 reserved;
u64 max_reclaim;
u64 reclaimed = 0;
int no_reclaim = 0;
int pause = 1;
int ret;
block_rsv = &root->fs_info->delalloc_block_rsv;
spin_lock(&block_rsv->lock);
reserved = block_rsv->reserved;
spin_unlock(&block_rsv->lock);
space_info = block_rsv->space_info;
spin_lock(&space_info->lock);
reserved = space_info->bytes_reserved;
spin_unlock(&space_info->lock);
if (reserved == 0)
return 0;
@ -3354,22 +3330,26 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans,
max_reclaim = min(reserved, to_reclaim);
while (1) {
ret = btrfs_start_one_delalloc_inode(root, trans ? 1 : 0);
ret = btrfs_start_one_delalloc_inode(root, trans ? 1 : 0, sync);
if (!ret) {
if (no_reclaim > 2)
break;
no_reclaim++;
__set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(pause);
pause <<= 1;
if (pause > HZ / 10)
pause = HZ / 10;
} else {
no_reclaim = 0;
pause = 1;
}
spin_lock(&block_rsv->lock);
if (reserved > block_rsv->reserved)
reclaimed = reserved - block_rsv->reserved;
reserved = block_rsv->reserved;
spin_unlock(&block_rsv->lock);
spin_lock(&space_info->lock);
if (reserved > space_info->bytes_reserved)
reclaimed += reserved - space_info->bytes_reserved;
reserved = space_info->bytes_reserved;
spin_unlock(&space_info->lock);
if (reserved == 0 || reclaimed >= max_reclaim)
break;
@ -3380,79 +3360,142 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans,
return reclaimed >= to_reclaim;
}
static int should_retry_reserve(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,
u64 num_bytes, int *retries)
{
struct btrfs_space_info *space_info = block_rsv->space_info;
int ret;
if ((*retries) > 2)
return -ENOSPC;
ret = maybe_allocate_chunk(trans, root, space_info, num_bytes);
if (ret)
return 1;
if (trans && trans->transaction->in_commit)
return -ENOSPC;
ret = shrink_delalloc(trans, root, num_bytes);
if (ret)
return ret;
spin_lock(&space_info->lock);
if (space_info->bytes_pinned < num_bytes)
ret = 1;
spin_unlock(&space_info->lock);
if (ret)
return -ENOSPC;
(*retries)++;
if (trans)
return -EAGAIN;
trans = btrfs_join_transaction(root, 1);
BUG_ON(IS_ERR(trans));
ret = btrfs_commit_transaction(trans, root);
BUG_ON(ret);
return 1;
}
static int reserve_metadata_bytes(struct btrfs_block_rsv *block_rsv,
u64 num_bytes)
/*
* Retries tells us how many times we've called reserve_metadata_bytes. The
* idea is if this is the first call (retries == 0) then we will add to our
* reserved count if we can't make the allocation in order to hold our place
* while we go and try and free up space. That way for retries > 1 we don't try
* and add space, we just check to see if the amount of unused space is >= the
* total space, meaning that our reservation is valid.
*
* However if we don't intend to retry this reservation, pass -1 as retries so
* that it short circuits this logic.
*/
static int reserve_metadata_bytes(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,
u64 orig_bytes, int flush)
{
struct btrfs_space_info *space_info = block_rsv->space_info;
u64 unused;
int ret = -ENOSPC;
u64 num_bytes = orig_bytes;
int retries = 0;
int ret = 0;
bool reserved = false;
bool committed = false;
again:
ret = -ENOSPC;
if (reserved)
num_bytes = 0;
spin_lock(&space_info->lock);
unused = space_info->bytes_used + space_info->bytes_reserved +
space_info->bytes_pinned + space_info->bytes_readonly;
space_info->bytes_pinned + space_info->bytes_readonly +
space_info->bytes_may_use;
if (unused < space_info->total_bytes)
unused = space_info->total_bytes - unused;
else
unused = 0;
if (unused >= num_bytes) {
if (block_rsv->priority >= 10) {
space_info->bytes_reserved += num_bytes;
/*
* The idea here is that we've not already over-reserved the block group
* then we can go ahead and save our reservation first and then start
* flushing if we need to. Otherwise if we've already overcommitted
* lets start flushing stuff first and then come back and try to make
* our reservation.
*/
if (unused <= space_info->total_bytes) {
unused -= space_info->total_bytes;
if (unused >= num_bytes) {
if (!reserved)
space_info->bytes_reserved += orig_bytes;
ret = 0;
} else {
if ((unused + block_rsv->reserved) *
block_rsv->priority >=
(num_bytes + block_rsv->reserved) * 10) {
space_info->bytes_reserved += num_bytes;
ret = 0;
}
/*
* Ok set num_bytes to orig_bytes since we aren't
* overocmmitted, this way we only try and reclaim what
* we need.
*/
num_bytes = orig_bytes;
}
} else {
/*
* Ok we're over committed, set num_bytes to the overcommitted
* amount plus the amount of bytes that we need for this
* reservation.
*/
num_bytes = unused - space_info->total_bytes +
(orig_bytes * (retries + 1));
}
/*
* Couldn't make our reservation, save our place so while we're trying
* to reclaim space we can actually use it instead of somebody else
* stealing it from us.
*/
if (ret && !reserved) {
space_info->bytes_reserved += orig_bytes;
reserved = true;
}
spin_unlock(&space_info->lock);
if (!ret)
return 0;
if (!flush)
goto out;
/*
* We do synchronous shrinking since we don't actually unreserve
* metadata until after the IO is completed.
*/
ret = shrink_delalloc(trans, root, num_bytes, 1);
if (ret > 0)
return 0;
else if (ret < 0)
goto out;
/*
* So if we were overcommitted it's possible that somebody else flushed
* out enough space and we simply didn't have enough space to reclaim,
* so go back around and try again.
*/
if (retries < 2) {
retries++;
goto again;
}
spin_lock(&space_info->lock);
/*
* Not enough space to be reclaimed, don't bother committing the
* transaction.
*/
if (space_info->bytes_pinned < orig_bytes)
ret = -ENOSPC;
spin_unlock(&space_info->lock);
if (ret)
goto out;
ret = -EAGAIN;
if (trans || committed)
goto out;
ret = -ENOSPC;
trans = btrfs_join_transaction(root, 1);
if (IS_ERR(trans))
goto out;
ret = btrfs_commit_transaction(trans, root);
if (!ret) {
trans = NULL;
committed = true;
goto again;
}
out:
if (reserved) {
spin_lock(&space_info->lock);
space_info->bytes_reserved -= orig_bytes;
spin_unlock(&space_info->lock);
}
return ret;
}
@ -3595,23 +3638,19 @@ void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,
u64 num_bytes, int *retries)
u64 num_bytes)
{
int ret;
if (num_bytes == 0)
return 0;
again:
ret = reserve_metadata_bytes(block_rsv, num_bytes);
ret = reserve_metadata_bytes(trans, root, block_rsv, num_bytes, 1);
if (!ret) {
block_rsv_add_bytes(block_rsv, num_bytes, 1);
return 0;
}
ret = should_retry_reserve(trans, root, block_rsv, num_bytes, retries);
if (ret > 0)
goto again;
return ret;
}
@ -3646,7 +3685,8 @@ int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
return 0;
if (block_rsv->refill_used) {
ret = reserve_metadata_bytes(block_rsv, num_bytes);
ret = reserve_metadata_bytes(trans, root, block_rsv,
num_bytes, 0);
if (!ret) {
block_rsv_add_bytes(block_rsv, num_bytes, 0);
return 0;
@ -3725,6 +3765,8 @@ static u64 calc_global_metadata_size(struct btrfs_fs_info *fs_info)
sinfo = __find_space_info(fs_info, BTRFS_BLOCK_GROUP_METADATA);
spin_lock(&sinfo->lock);
if (sinfo->flags & BTRFS_BLOCK_GROUP_DATA)
data_used = 0;
meta_used = sinfo->bytes_used;
spin_unlock(&sinfo->lock);
@ -3752,7 +3794,8 @@ static void update_global_block_rsv(struct btrfs_fs_info *fs_info)
block_rsv->size = num_bytes;
num_bytes = sinfo->bytes_used + sinfo->bytes_pinned +
sinfo->bytes_reserved + sinfo->bytes_readonly;
sinfo->bytes_reserved + sinfo->bytes_readonly +
sinfo->bytes_may_use;
if (sinfo->total_bytes > num_bytes) {
num_bytes = sinfo->total_bytes - num_bytes;
@ -3823,7 +3866,7 @@ static u64 calc_trans_metadata_size(struct btrfs_root *root, int num_items)
int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
int num_items, int *retries)
int num_items)
{
u64 num_bytes;
int ret;
@ -3833,7 +3876,7 @@ int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
num_bytes = calc_trans_metadata_size(root, num_items);
ret = btrfs_block_rsv_add(trans, root, &root->fs_info->trans_block_rsv,
num_bytes, retries);
num_bytes);
if (!ret) {
trans->bytes_reserved += num_bytes;
trans->block_rsv = &root->fs_info->trans_block_rsv;
@ -3907,14 +3950,13 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
struct btrfs_block_rsv *block_rsv = &root->fs_info->delalloc_block_rsv;
u64 to_reserve;
int nr_extents;
int retries = 0;
int ret;
if (btrfs_transaction_in_commit(root->fs_info))
schedule_timeout(1);
num_bytes = ALIGN(num_bytes, root->sectorsize);
again:
spin_lock(&BTRFS_I(inode)->accounting_lock);
nr_extents = atomic_read(&BTRFS_I(inode)->outstanding_extents) + 1;
if (nr_extents > BTRFS_I(inode)->reserved_extents) {
@ -3924,18 +3966,14 @@ again:
nr_extents = 0;
to_reserve = 0;
}
spin_unlock(&BTRFS_I(inode)->accounting_lock);
to_reserve += calc_csum_metadata_size(inode, num_bytes);
ret = reserve_metadata_bytes(block_rsv, to_reserve);
if (ret) {
spin_unlock(&BTRFS_I(inode)->accounting_lock);
ret = should_retry_reserve(NULL, root, block_rsv, to_reserve,
&retries);
if (ret > 0)
goto again;
ret = reserve_metadata_bytes(NULL, root, block_rsv, to_reserve, 1);
if (ret)
return ret;
}
spin_lock(&BTRFS_I(inode)->accounting_lock);
BTRFS_I(inode)->reserved_extents += nr_extents;
atomic_inc(&BTRFS_I(inode)->outstanding_extents);
spin_unlock(&BTRFS_I(inode)->accounting_lock);
@ -3943,7 +3981,7 @@ again:
block_rsv_add_bytes(block_rsv, to_reserve, 1);
if (block_rsv->size > 512 * 1024 * 1024)
shrink_delalloc(NULL, root, to_reserve);
shrink_delalloc(NULL, root, to_reserve, 0);
return 0;
}
@ -5561,7 +5599,8 @@ use_block_rsv(struct btrfs_trans_handle *trans,
block_rsv = get_block_rsv(trans, root);
if (block_rsv->size == 0) {
ret = reserve_metadata_bytes(block_rsv, blocksize);
ret = reserve_metadata_bytes(trans, root, block_rsv,
blocksize, 0);
if (ret)
return ERR_PTR(ret);
return block_rsv;
@ -5571,11 +5610,6 @@ use_block_rsv(struct btrfs_trans_handle *trans,
if (!ret)
return block_rsv;
WARN_ON(1);
printk(KERN_INFO"block_rsv size %llu reserved %llu freed %llu %llu\n",
block_rsv->size, block_rsv->reserved,
block_rsv->freed[0], block_rsv->freed[1]);
return ERR_PTR(-ENOSPC);
}
@ -8393,6 +8427,7 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
struct btrfs_key key;
struct inode *inode;
int ret;
int factor;
root = root->fs_info->extent_root;
@ -8400,6 +8435,14 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
BUG_ON(!block_group);
BUG_ON(!block_group->ro);
memcpy(&key, &block_group->key, sizeof(key));
if (block_group->flags & (BTRFS_BLOCK_GROUP_DUP |
BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10))
factor = 2;
else
factor = 1;
/* make sure this block group isn't part of an allocation cluster */
cluster = &root->fs_info->data_alloc_cluster;
spin_lock(&cluster->refill_lock);
@ -8473,6 +8516,7 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
spin_lock(&block_group->space_info->lock);
block_group->space_info->total_bytes -= block_group->key.offset;
block_group->space_info->bytes_readonly -= block_group->key.offset;
block_group->space_info->disk_total -= block_group->key.offset * factor;
spin_unlock(&block_group->space_info->lock);
memcpy(&key, &block_group->key, sizeof(key));

24
fs/btrfs/inode.c
View File

@ -6681,7 +6681,8 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
return 0;
}
int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput)
int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput,
int sync)
{
struct btrfs_inode *binode;
struct inode *inode = NULL;
@ -6703,7 +6704,26 @@ int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput)
spin_unlock(&root->fs_info->delalloc_lock);
if (inode) {
write_inode_now(inode, 0);
if (sync) {
filemap_write_and_wait(inode->i_mapping);
/*
* We have to do this because compression doesn't
* actually set PG_writeback until it submits the pages
* for IO, which happens in an async thread, so we could
* race and not actually wait for any writeback pages
* because they've not been submitted yet. Technically
* this could still be the case for the ordered stuff
* since the async thread may not have started to do its
* work yet. If this becomes the case then we need to
* figure out a way to make sure that in writepage we
* wait for any async pages to be submitted before
* returning so that fdatawait does what its supposed to
* do.
*/
btrfs_wait_ordered_range(inode, 0, (u64)-1);
} else {
filemap_flush(inode->i_mapping);
}
if (delay_iput)
btrfs_add_delayed_iput(inode);
else

98
fs/btrfs/ioctl.c
View File

@ -1879,6 +1879,22 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
return 0;
}
static void get_block_group_info(struct list_head *groups_list,
struct btrfs_ioctl_space_info *space)
{
struct btrfs_block_group_cache *block_group;
space->total_bytes = 0;
space->used_bytes = 0;
space->flags = 0;
list_for_each_entry(block_group, groups_list, list) {
space->flags = block_group->flags;
space->total_bytes += block_group->key.offset;
space->used_bytes +=
btrfs_block_group_used(&block_group->item);
}
}
long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)
{
struct btrfs_ioctl_space_args space_args;
@ -1887,27 +1903,56 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)
struct btrfs_ioctl_space_info *dest_orig;
struct btrfs_ioctl_space_info *user_dest;
struct btrfs_space_info *info;
u64 types[] = {BTRFS_BLOCK_GROUP_DATA,
BTRFS_BLOCK_GROUP_SYSTEM,
BTRFS_BLOCK_GROUP_METADATA,
BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA};
int num_types = 4;
int alloc_size;
int ret = 0;
int slot_count = 0;
int i, c;
if (copy_from_user(&space_args,
(struct btrfs_ioctl_space_args __user *)arg,
sizeof(space_args)))
return -EFAULT;
/* first we count slots */
rcu_read_lock();
list_for_each_entry_rcu(info, &root->fs_info->space_info, list)
slot_count++;
rcu_read_unlock();
for (i = 0; i < num_types; i++) {
struct btrfs_space_info *tmp;
info = NULL;
rcu_read_lock();
list_for_each_entry_rcu(tmp, &root->fs_info->space_info,
list) {
if (tmp->flags == types[i]) {
info = tmp;
break;
}
}
rcu_read_unlock();
if (!info)
continue;
down_read(&info->groups_sem);
for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) {
if (!list_empty(&info->block_groups[c]))
slot_count++;
}
up_read(&info->groups_sem);
}
/* space_slots == 0 means they are asking for a count */
if (space_args.space_slots == 0) {
space_args.total_spaces = slot_count;
goto out;
}
slot_count = min_t(int, space_args.space_slots, slot_count);
alloc_size = sizeof(*dest) * slot_count;
/* we generally have at most 6 or so space infos, one for each raid
* level. So, a whole page should be more than enough for everyone
*/
@ -1921,27 +1966,34 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)
dest_orig = dest;
/* now we have a buffer to copy into */
rcu_read_lock();
list_for_each_entry_rcu(info, &root->fs_info->space_info, list) {
/* make sure we don't copy more than we allocated
* in our buffer
*/
if (slot_count == 0)
break;
slot_count--;
for (i = 0; i < num_types; i++) {
struct btrfs_space_info *tmp;
/* make sure userland has enough room in their buffer */
if (space_args.total_spaces >= space_args.space_slots)
break;
info = NULL;
rcu_read_lock();
list_for_each_entry_rcu(tmp, &root->fs_info->space_info,
list) {
if (tmp->flags == types[i]) {
info = tmp;
break;
}
}
rcu_read_unlock();
space.flags = info->flags;
space.total_bytes = info->total_bytes;
space.used_bytes = info->bytes_used;
memcpy(dest, &space, sizeof(space));
dest++;
space_args.total_spaces++;
if (!info)
continue;
down_read(&info->groups_sem);
for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) {
if (!list_empty(&info->block_groups[c])) {
get_block_group_info(&info->block_groups[c],
&space);
memcpy(dest, &space, sizeof(space));
dest++;
space_args.total_spaces++;
}
}
up_read(&info->groups_sem);
}
rcu_read_unlock();
user_dest = (struct btrfs_ioctl_space_info *)
(arg + sizeof(struct btrfs_ioctl_space_args));

14
fs/btrfs/relocation.c
View File

@ -179,8 +179,6 @@ struct reloc_control {
u64 search_start;
u64 extents_found;
int block_rsv_retries;
unsigned int stage:8;
unsigned int create_reloc_tree:1;
unsigned int merge_reloc_tree:1;
@ -2134,7 +2132,6 @@ int prepare_to_merge(struct reloc_control *rc, int err)
LIST_HEAD(reloc_roots);
u64 num_bytes = 0;
int ret;
int retries = 0;
mutex_lock(&root->fs_info->trans_mutex);
rc->merging_rsv_size += root->nodesize * (BTRFS_MAX_LEVEL - 1) * 2;
@ -2144,7 +2141,7 @@ again:
if (!err) {
num_bytes = rc->merging_rsv_size;
ret = btrfs_block_rsv_add(NULL, root, rc->block_rsv,
num_bytes, &retries);
num_bytes);
if (ret)
err = ret;
}
@ -2156,7 +2153,6 @@ again:
btrfs_end_transaction(trans, rc->extent_root);
btrfs_block_rsv_release(rc->extent_root,
rc->block_rsv, num_bytes);
retries = 0;
goto again;
}
}
@ -2406,15 +2402,13 @@ static int reserve_metadata_space(struct btrfs_trans_handle *trans,
num_bytes = calcu_metadata_size(rc, node, 1) * 2;
trans->block_rsv = rc->block_rsv;
ret = btrfs_block_rsv_add(trans, root, rc->block_rsv, num_bytes,
&rc->block_rsv_retries);
ret = btrfs_block_rsv_add(trans, root, rc->block_rsv, num_bytes);
if (ret) {
if (ret == -EAGAIN)
rc->commit_transaction = 1;
return ret;
}
rc->block_rsv_retries = 0;
return 0;
}
@ -3615,8 +3609,7 @@ int prepare_to_relocate(struct reloc_control *rc)
* is no reservation in transaction handle.
*/
ret = btrfs_block_rsv_add(NULL, rc->extent_root, rc->block_rsv,
rc->extent_root->nodesize * 256,
&rc->block_rsv_retries);
rc->extent_root->nodesize * 256);
if (ret)
return ret;
@ -3628,7 +3621,6 @@ int prepare_to_relocate(struct reloc_control *rc)
rc->extents_found = 0;
rc->nodes_relocated = 0;
rc->merging_rsv_size = 0;
rc->block_rsv_retries = 0;
rc->create_reloc_tree = 1;
set_reloc_control(rc);

18
fs/btrfs/super.c
View File

@ -638,7 +638,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
if (IS_ERR(root)) {
error = PTR_ERR(root);
deactivate_locked_super(s);
goto error;
goto error_free_subvol_name;
}
/* if they gave us a subvolume name bind mount into that */
if (strcmp(subvol_name, ".")) {
@ -652,14 +652,14 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
deactivate_locked_super(s);
error = PTR_ERR(new_root);
dput(root);
goto error_close_devices;
goto error_free_subvol_name;
}
if (!new_root->d_inode) {
dput(root);
dput(new_root);
deactivate_locked_super(s);
error = -ENXIO;
goto error_close_devices;
goto error_free_subvol_name;
}
dput(root);
root = new_root;
@ -677,7 +677,6 @@ error_close_devices:
btrfs_close_devices(fs_devices);
error_free_subvol_name:
kfree(subvol_name);
error:
return error;
}
@ -725,18 +724,25 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
struct list_head *head = &root->fs_info->space_info;
struct btrfs_space_info *found;
u64 total_used = 0;
u64 total_used_data = 0;
int bits = dentry->d_sb->s_blocksize_bits;
__be32 *fsid = (__be32 *)root->fs_info->fsid;
rcu_read_lock();
list_for_each_entry_rcu(found, head, list)
list_for_each_entry_rcu(found, head, list) {
if (found->flags & (BTRFS_BLOCK_GROUP_METADATA |
BTRFS_BLOCK_GROUP_SYSTEM))
total_used_data += found->disk_total;
else
total_used_data += found->disk_used;
total_used += found->disk_used;
}
rcu_read_unlock();
buf->f_namelen = BTRFS_NAME_LEN;
buf->f_blocks = btrfs_super_total_bytes(disk_super) >> bits;
buf->f_bfree = buf->f_blocks - (total_used >> bits);
buf->f_bavail = buf->f_bfree;
buf->f_bavail = buf->f_blocks - (total_used_data >> bits);
buf->f_bsize = dentry->d_sb->s_blocksize;
buf->f_type = BTRFS_SUPER_MAGIC;

7
fs/btrfs/transaction.c
View File

@ -180,7 +180,6 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
{
struct btrfs_trans_handle *h;
struct btrfs_transaction *cur_trans;
int retries = 0;
int ret;
again:
h = kmem_cache_alloc(btrfs_trans_handle_cachep, GFP_NOFS);
@ -215,8 +214,7 @@ again:
}
if (num_items > 0) {
ret = btrfs_trans_reserve_metadata(h, root, num_items,
&retries);
ret = btrfs_trans_reserve_metadata(h, root, num_items);
if (ret == -EAGAIN) {
btrfs_commit_transaction(h, root);
goto again;
@ -855,7 +853,6 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
struct extent_buffer *tmp;
struct extent_buffer *old;
int ret;
int retries = 0;
u64 to_reserve = 0;
u64 index = 0;
u64 objectid;
@ -877,7 +874,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
if (to_reserve > 0) {
ret = btrfs_block_rsv_add(trans, root, &pending->block_rsv,
to_reserve, &retries);
to_reserve);
if (ret) {
pending->error = ret;
goto fail;