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Commit 5c80c71b authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: set i_size properly when fallocating and we already
  btrfs: unlock on error in btrfs_file_llseek()
  btrfs: btrfs_permission's RO check shouldn't apply to device nodes
  Btrfs: truncate pages from clone ioctl target range
  Btrfs: fix uninitialized sync_pending
  Btrfs: fix wrong free space information
  btrfs: memory leak in btrfs_add_inode_defrag()
  Btrfs: use plain page_address() in header fields setget functions
  Btrfs: forced readonly when btrfs_drop_snapshot() fails
  Btrfs: check if there is enough space for balancing smarter
  Btrfs: fix a bug of balance on full multi-disk partitions
  Btrfs: fix an oops of log replay
  Btrfs: detect wether a device supports discard
  Btrfs: force unplugs when switching from high to regular priority bios
parents 01fa4ba5 81d86e1b

fs/btrfs/ctree.h

+4 −6
Original line number Diff line number Diff line
@@ -1415,17 +1415,15 @@ void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); 
#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits)		\

static inline u##bits btrfs_##name(struct extent_buffer *eb)		\

{									\

	type *p = kmap_atomic(eb->first_page, KM_USER0);		\

	type *p = page_address(eb->first_page);				\

	u##bits res = le##bits##_to_cpu(p->member);			\

	kunmap_atomic(p, KM_USER0);					\

	return res;							\

}									\

static inline void btrfs_set_##name(struct extent_buffer *eb,		\

				    u##bits val)			\

{									\

	type *p = kmap_atomic(eb->first_page, KM_USER0);		\

	type *p = page_address(eb->first_page);				\

	p->member = cpu_to_le##bits(val);				\

	kunmap_atomic(p, KM_USER0);					\

}



#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits)		\
@@ -2367,7 +2365,7 @@ static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);

int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);

int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);

int btrfs_drop_snapshot(struct btrfs_root *root,

void btrfs_drop_snapshot(struct btrfs_root *root,

			 struct btrfs_block_rsv *block_rsv, int update_ref);

int btrfs_drop_subtree(struct btrfs_trans_handle *trans,

			struct btrfs_root *root,

fs/btrfs/extent-tree.c

+59 −16
Original line number Diff line number Diff line
@@ -1782,6 +1782,9 @@ static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, 




		for (i = 0; i < multi->num_stripes; i++, stripe++) {

			if (!stripe->dev->can_discard)

				continue;



			ret = btrfs_issue_discard(stripe->dev->bdev,

						  stripe->physical,

						  stripe->length);
@@ -1789,11 +1792,16 @@ static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, 
				discarded_bytes += stripe->length;

			else if (ret != -EOPNOTSUPP)

				break;



			/*

			 * Just in case we get back EOPNOTSUPP for some reason,

			 * just ignore the return value so we don't screw up

			 * people calling discard_extent.

			 */

			ret = 0;

		}

		kfree(multi);

	}

	if (discarded_bytes && ret == -EOPNOTSUPP)

		ret = 0;



	if (actual_bytes)

		*actual_bytes = discarded_bytes;
@@ -6269,7 +6277,7 @@ static noinline int walk_up_tree(struct btrfs_trans_handle *trans, 
 * also make sure backrefs for the shared block and all lower level

 * blocks are properly updated.

 */

int btrfs_drop_snapshot(struct btrfs_root *root,

void btrfs_drop_snapshot(struct btrfs_root *root,

			 struct btrfs_block_rsv *block_rsv, int update_ref)

{

	struct btrfs_path *path;
@@ -6283,13 +6291,16 @@ int btrfs_drop_snapshot(struct btrfs_root *root, 
	int level;



	path = btrfs_alloc_path();

	if (!path)

		return -ENOMEM;

	if (!path) {

		err = -ENOMEM;

		goto out;

	}



	wc = kzalloc(sizeof(*wc), GFP_NOFS);

	if (!wc) {

		btrfs_free_path(path);

		return -ENOMEM;

		err = -ENOMEM;

		goto out;

	}



	trans = btrfs_start_transaction(tree_root, 0);
@@ -6318,7 +6329,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root, 
		path->lowest_level = 0;

		if (ret < 0) {

			err = ret;

			goto out;

			goto out_free;

		}

		WARN_ON(ret > 0);
@@ -6425,11 +6436,14 @@ int btrfs_drop_snapshot(struct btrfs_root *root, 
		free_extent_buffer(root->commit_root);

		kfree(root);

	}

out:

out_free:

	btrfs_end_transaction_throttle(trans, tree_root);

	kfree(wc);

	btrfs_free_path(path);

	return err;

out:

	if (err)

		btrfs_std_error(root->fs_info, err);

	return;

}



/*
@@ -6720,6 +6734,10 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) 
	struct btrfs_space_info *space_info;

	struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;

	struct btrfs_device *device;

	u64 min_free;

	int index;

	int dev_nr = 0;

	int dev_min = 1;

	int full = 0;

	int ret = 0;
@@ -6729,8 +6747,10 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) 
	if (!block_group)

		return -1;



	min_free = btrfs_block_group_used(&block_group->item);



	/* no bytes used, we're good */

	if (!btrfs_block_group_used(&block_group->item))

	if (!min_free)

		goto out;



	space_info = block_group->space_info;
@@ -6748,8 +6768,7 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) 
	if ((space_info->total_bytes != block_group->key.offset) &&

	    (space_info->bytes_used + space_info->bytes_reserved +

	     space_info->bytes_pinned + space_info->bytes_readonly +

	    btrfs_block_group_used(&block_group->item) <

	    space_info->total_bytes)) {

	     min_free < space_info->total_bytes)) {

		spin_unlock(&space_info->lock);

		goto out;

	}
@@ -6766,9 +6785,29 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) 
	if (full)

		goto out;



	/*

	 * index:

	 *      0: raid10

	 *      1: raid1

	 *      2: dup

	 *      3: raid0

	 *      4: single

	 */

	index = get_block_group_index(block_group);

	if (index == 0) {

		dev_min = 4;

		min_free /= 2;

	} else if (index == 1) {

		dev_min = 2;

	} else if (index == 2) {

		min_free *= 2;

	} else if (index == 3) {

		dev_min = fs_devices->rw_devices;

		min_free /= dev_min;

	}



	mutex_lock(&root->fs_info->chunk_mutex);

	list_for_each_entry(device, &fs_devices->alloc_list, dev_alloc_list) {

		u64 min_free = btrfs_block_group_used(&block_group->item);

		u64 dev_offset;



		/*
@@ -6779,7 +6818,11 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) 
			ret = find_free_dev_extent(NULL, device, min_free,

						   &dev_offset, NULL);

			if (!ret)

				dev_nr++;



			if (dev_nr >= dev_min)

				break;



			ret = -1;

		}

	}

fs/btrfs/file.c

+24 −4
Original line number Diff line number Diff line
@@ -150,6 +150,8 @@ int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 
	spin_lock(&root->fs_info->defrag_inodes_lock);

	if (!BTRFS_I(inode)->in_defrag)

		__btrfs_add_inode_defrag(inode, defrag);

	else

		kfree(defrag);

	spin_unlock(&root->fs_info->defrag_inodes_lock);

	return 0;

}
@@ -1638,11 +1640,15 @@ static long btrfs_fallocate(struct file *file, int mode, 


	cur_offset = alloc_start;

	while (1) {

		u64 actual_end;



		em = btrfs_get_extent(inode, NULL, 0, cur_offset,

				      alloc_end - cur_offset, 0);

		BUG_ON(IS_ERR_OR_NULL(em));

		last_byte = min(extent_map_end(em), alloc_end);

		actual_end = min_t(u64, extent_map_end(em), offset + len);

		last_byte = (last_byte + mask) & ~mask;



		if (em->block_start == EXTENT_MAP_HOLE ||

		    (cur_offset >= inode->i_size &&

		     !test_bit(EXTENT_FLAG_PREALLOC, &em->flags))) {
@@ -1655,6 +1661,16 @@ static long btrfs_fallocate(struct file *file, int mode, 
				free_extent_map(em);

				break;

			}

		} else if (actual_end > inode->i_size &&

			   !(mode & FALLOC_FL_KEEP_SIZE)) {

			/*

			 * We didn't need to allocate any more space, but we

			 * still extended the size of the file so we need to

			 * update i_size.

			 */

			inode->i_ctime = CURRENT_TIME;

			i_size_write(inode, actual_end);

			btrfs_ordered_update_i_size(inode, actual_end, NULL);

		}

		free_extent_map(em);
@@ -1804,10 +1820,14 @@ static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int origin) 
		}

	}



	if (offset < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))

		return -EINVAL;

	if (offset > inode->i_sb->s_maxbytes)

		return -EINVAL;

	if (offset < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET)) {

		ret = -EINVAL;

		goto out;

	}

	if (offset > inode->i_sb->s_maxbytes) {

		ret = -EINVAL;

		goto out;

	}



	/* Special lock needed here? */

	if (offset != file->f_pos) {

fs/btrfs/free-space-cache.c

+11 −5
Original line number Diff line number Diff line
@@ -1168,9 +1168,9 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl) 
		div64_u64(extent_bytes, (sizeof(struct btrfs_free_space)));

}



static void bitmap_clear_bits(struct btrfs_free_space_ctl *ctl,

			      struct btrfs_free_space *info, u64 offset,

			      u64 bytes)

static inline void __bitmap_clear_bits(struct btrfs_free_space_ctl *ctl,

				       struct btrfs_free_space *info,

				       u64 offset, u64 bytes)

{

	unsigned long start, count;
@@ -1181,6 +1181,13 @@ static void bitmap_clear_bits(struct btrfs_free_space_ctl *ctl, 
	bitmap_clear(info->bitmap, start, count);



	info->bytes -= bytes;

}



static void bitmap_clear_bits(struct btrfs_free_space_ctl *ctl,

			      struct btrfs_free_space *info, u64 offset,

			      u64 bytes)

{

	__bitmap_clear_bits(ctl, info, offset, bytes);

	ctl->free_space -= bytes;

}
@@ -1984,7 +1991,7 @@ static u64 btrfs_alloc_from_bitmap(struct btrfs_block_group_cache *block_group, 
		return 0;



	ret = search_start;

	bitmap_clear_bits(ctl, entry, ret, bytes);

	__bitmap_clear_bits(ctl, entry, ret, bytes);



	return ret;

}
@@ -2039,7 +2046,6 @@ u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group, 
				continue;

			}

		} else {



			ret = entry->offset;



			entry->offset += bytes;

fs/btrfs/inode.c

+8 −4
Original line number Diff line number Diff line
@@ -7354,11 +7354,15 @@ static int btrfs_set_page_dirty(struct page *page) 
static int btrfs_permission(struct inode *inode, int mask)

{

	struct btrfs_root *root = BTRFS_I(inode)->root;

	umode_t mode = inode->i_mode;



	if (btrfs_root_readonly(root) && (mask & MAY_WRITE))

	if (mask & MAY_WRITE &&

	    (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))) {

		if (btrfs_root_readonly(root))

			return -EROFS;

	if ((BTRFS_I(inode)->flags & BTRFS_INODE_READONLY) && (mask & MAY_WRITE))

		if (BTRFS_I(inode)->flags & BTRFS_INODE_READONLY)

			return -EACCES;

	}

	return generic_permission(inode, mask);

}