diff options
| -rw-r--r-- | fs/btrfs/ctree.h | 12 | ||||
| -rw-r--r-- | fs/btrfs/extent-tree.c | 298 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 24 | ||||
| -rw-r--r-- | fs/btrfs/ioctl.c | 100 | ||||
| -rw-r--r-- | fs/btrfs/relocation.c | 14 | ||||
| -rw-r--r-- | fs/btrfs/super.c | 18 | ||||
| -rw-r--r-- | fs/btrfs/transaction.c | 7 |
7 files changed, 294 insertions, 179 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 633e559e000e..88c0fb7e12d2 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -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, diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index d2a7ff53e99a..372fd224a11d 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -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; @@ -3380,78 +3360,141 @@ 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) +/* + * 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; - int ret; + u64 unused; + u64 num_bytes = orig_bytes; + int retries = 0; + int ret = 0; + bool reserved = false; + bool committed = false; - if ((*retries) > 2) - return -ENOSPC; +again: + ret = -ENOSPC; + if (reserved) + num_bytes = 0; - ret = maybe_allocate_chunk(trans, root, space_info, num_bytes); - if (ret) - return 1; + 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_may_use; - if (trans && trans->transaction->in_commit) - return -ENOSPC; + /* + * 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 { + /* + * 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)); + } - ret = shrink_delalloc(trans, root, num_bytes); - if (ret) - return ret; + /* + * 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_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; + if (!ret) + return 0; - trans = btrfs_join_transaction(root, 1); - BUG_ON(IS_ERR(trans)); - ret = btrfs_commit_transaction(trans, root); - BUG_ON(ret); + if (!flush) + goto out; - return 1; -} + /* + * 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; -static int reserve_metadata_bytes(struct btrfs_block_rsv *block_rsv, - u64 num_bytes) -{ - struct btrfs_space_info *space_info = block_rsv->space_info; - u64 unused; - int ret = -ENOSPC; + /* + * 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); - unused = space_info->bytes_used + space_info->bytes_reserved + - space_info->bytes_pinned + space_info->bytes_readonly; + /* + * 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; - if (unused < space_info->total_bytes) - unused = space_info->total_bytes - unused; - else - unused = 0; + ret = -EAGAIN; + if (trans || committed) + goto out; - if (unused >= num_bytes) { - if (block_rsv->priority >= 10) { - space_info->bytes_reserved += num_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; - } - } + 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); } - 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)); diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index f2fb974ed8f0..9f08136b10c4 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -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 diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 9254b3d58dbe..db0b8fc59235 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -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--; - - /* make sure userland has enough room in their buffer */ - if (space_args.total_spaces >= space_args.space_slots) - break; + 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(); - 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)); diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index af339eee55b8..fd0714475db7 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -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); diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 5f56213908e7..65b62daa3f80 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -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; diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index e7144c48ed79..325d9a5f0128 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -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; |