btrfs: convert pr_* to btrfs_* where possible

For many printks, we want to know which file system issued the message.

This patch converts most pr_* calls to use the btrfs_* versions instead.
In some cases, this means adding plumbing to allow call sites access to
an fs_info pointer.

fs/btrfs/check-integrity.c is left alone for another day.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/backref.c

@@ -650,7 +650,8 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info,
 	/* root node has been locked, we can release @subvol_srcu safely here */
 	srcu_read_unlock(&fs_info->subvol_srcu, index);
 
-	pr_debug("search slot in root %llu (level %d, ref count %d) returned %d for key (%llu %u %llu)\n",
+	btrfs_debug(fs_info,
+		"search slot in root %llu (level %d, ref count %d) returned %d for key (%llu %u %llu)",
 		 ref->root_id, level, ref->count, ret,
 		 ref->key_for_search.objectid, ref->key_for_search.type,
 		 ref->key_for_search.offset);
@@ -1834,7 +1835,8 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
 
 	if (found_key->objectid > logical ||
 	    found_key->objectid + size <= logical) {
-		pr_debug("logical %llu is not within any extent\n", logical);
+		btrfs_debug(fs_info,
+			"logical %llu is not within any extent", logical);
 		return -ENOENT;
 	}
 
@@ -1845,7 +1847,8 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
 	ei = btrfs_item_ptr(eb, path->slots[0], struct btrfs_extent_item);
 	flags = btrfs_extent_flags(eb, ei);
 
-	pr_debug("logical %llu is at position %llu within the extent (%llu EXTENT_ITEM %llu) flags %#llx size %u\n",
+	btrfs_debug(fs_info,
+		"logical %llu is at position %llu within the extent (%llu EXTENT_ITEM %llu) flags %#llx size %u",
 		 logical, logical - found_key->objectid, found_key->objectid,
 		 found_key->offset, flags, item_size);
 
@@ -1966,20 +1969,24 @@ int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
 	return 0;
 }
 
-static int iterate_leaf_refs(struct extent_inode_elem *inode_list,
-				u64 root, u64 extent_item_objectid,
-				iterate_extent_inodes_t *iterate, void *ctx)
+static int iterate_leaf_refs(struct btrfs_fs_info *fs_info,
+			     struct extent_inode_elem *inode_list,
+			     u64 root, u64 extent_item_objectid,
+			     iterate_extent_inodes_t *iterate, void *ctx)
 {
 	struct extent_inode_elem *eie;
 	int ret = 0;
 
 	for (eie = inode_list; eie; eie = eie->next) {
-		pr_debug("ref for %llu resolved, key (%llu EXTEND_DATA %llu), root %llu\n", extent_item_objectid,
-			 eie->inum, eie->offset, root);
+		btrfs_debug(fs_info,
+			    "ref for %llu resolved, key (%llu EXTEND_DATA %llu), root %llu",
+			    extent_item_objectid, eie->inum,
+			    eie->offset, root);
 		ret = iterate(eie->inum, eie->offset, root, ctx);
 		if (ret) {
-			pr_debug("stopping iteration for %llu due to ret=%d\n",
-				 extent_item_objectid, ret);
+			btrfs_debug(fs_info,
+				    "stopping iteration for %llu due to ret=%d",
+				    extent_item_objectid, ret);
 			break;
 		}
 	}
@@ -2007,7 +2014,7 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
 	struct ulist_iterator ref_uiter;
 	struct ulist_iterator root_uiter;
 
-	pr_debug("resolving all inodes for extent %llu\n",
+	btrfs_debug(fs_info, "resolving all inodes for extent %llu",
 			extent_item_objectid);
 
 	if (!search_commit_root) {
@@ -2033,9 +2040,12 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
 			break;
 		ULIST_ITER_INIT(&root_uiter);
 		while (!ret && (root_node = ulist_next(roots, &root_uiter))) {
-			pr_debug("root %llu references leaf %llu, data list %#llx\n", root_node->val, ref_node->val,
-				 ref_node->aux);
-			ret = iterate_leaf_refs((struct extent_inode_elem *)
+			btrfs_debug(fs_info,
+				    "root %llu references leaf %llu, data list %#llx",
+				    root_node->val, ref_node->val,
+				    ref_node->aux);
+			ret = iterate_leaf_refs(fs_info,
+						(struct extent_inode_elem *)
 						(uintptr_t)ref_node->aux,
 						root_node->val,
 						extent_item_objectid,
@@ -2131,8 +2141,9 @@ static int iterate_inode_refs(u64 inum, struct btrfs_root *fs_root,
 		for (cur = 0; cur < btrfs_item_size(eb, item); cur += len) {
 			name_len = btrfs_inode_ref_name_len(eb, iref);
 			/* path must be released before calling iterate()! */
-			pr_debug("following ref at offset %u for inode %llu in tree %llu\n", cur, found_key.objectid,
-				 fs_root->objectid);
+			btrfs_debug(fs_root->fs_info,
+				"following ref at offset %u for inode %llu in tree %llu",
+				cur, found_key.objectid, fs_root->objectid);
 			ret = iterate(parent, name_len,
 				      (unsigned long)(iref + 1), eb, ctx);
 			if (ret)

fs/btrfs/compression.c

@@ -853,7 +853,7 @@ again:
 					/* no burst */ 1);
 
 			if (__ratelimit(&_rs)) {
-				pr_warn("no compression workspaces, low memory, retrying\n");
+				pr_warn("BTRFS: no compression workspaces, low memory, retrying\n");
 			}
 		}
 		goto again;

fs/btrfs/ctree.h

@@ -3395,7 +3395,7 @@ do {								\
 __cold
 static inline void assfail(char *expr, char *file, int line)
 {
-	pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
+	pr_err("assertion failed: %s, file: %s, line: %d\n",
 	       expr, file, line);
 	BUG();
 }

fs/btrfs/delayed-ref.c

@@ -322,10 +322,11 @@ int btrfs_check_delayed_seq(struct btrfs_fs_info *fs_info,
 		elem = list_first_entry(&fs_info->tree_mod_seq_list,
 					struct seq_list, list);
 		if (seq >= elem->seq) {
-			pr_debug("holding back delayed_ref %#x.%x, lowest is %#x.%x (%p)\n",
-				 (u32)(seq >> 32), (u32)seq,
-				 (u32)(elem->seq >> 32), (u32)elem->seq,
-				 delayed_refs);
+			btrfs_debug(fs_info,
+				"holding back delayed_ref %#x.%x, lowest is %#x.%x (%p)",
+				(u32)(seq >> 32), (u32)seq,
+				(u32)(elem->seq >> 32), (u32)elem->seq,
+				delayed_refs);
 			ret = 1;
 		}
 	}

fs/btrfs/dev-replace.c

@@ -385,7 +385,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root, char *tgtdev_name,
 
 	ret = btrfs_sysfs_add_device_link(tgt_device->fs_devices, tgt_device);
 	if (ret)
-		btrfs_err(fs_info, "kobj add dev failed %d\n", ret);
+		btrfs_err(fs_info, "kobj add dev failed %d", ret);
 
 	btrfs_wait_ordered_roots(root->fs_info, -1, 0, (u64)-1);
 

fs/btrfs/disk-io.c

@@ -401,7 +401,8 @@ out:
  * Return 0 if the superblock checksum type matches the checksum value of that
  * algorithm. Pass the raw disk superblock data.
  */
-static int btrfs_check_super_csum(char *raw_disk_sb)
+static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info,
+				  char *raw_disk_sb)
 {
 	struct btrfs_super_block *disk_sb =
 		(struct btrfs_super_block *)raw_disk_sb;
@@ -427,7 +428,7 @@ static int btrfs_check_super_csum(char *raw_disk_sb)
 	}
 
 	if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) {
-		pr_err("BTRFS: unsupported checksum algorithm %u\n",
+		btrfs_err(fs_info, "unsupported checksum algorithm %u",
 				csum_type);
 		ret = 1;
 	}
@@ -2780,7 +2781,7 @@ int open_ctree(struct super_block *sb,
 	 * We want to check superblock checksum, the type is stored inside.
 	 * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k).
 	 */
-	if (btrfs_check_super_csum(bh->b_data)) {
+	if (btrfs_check_super_csum(fs_info, bh->b_data)) {
 		btrfs_err(fs_info, "superblock checksum mismatch");
 		err = -EINVAL;
 		brelse(bh);
@@ -3624,7 +3625,7 @@ int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags)
 	}
 
 	if (min_tolerated == INT_MAX) {
-		pr_warn("BTRFS: unknown raid flag: %llu\n", flags);
+		pr_warn("BTRFS: unknown raid flag: %llu", flags);
 		min_tolerated = 0;
 	}
 
@@ -4114,24 +4115,24 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	int ret = 0;
 
 	if (btrfs_super_magic(sb) != BTRFS_MAGIC) {
-		pr_err("BTRFS: no valid FS found\n");
+		btrfs_err(fs_info, "no valid FS found");
 		ret = -EINVAL;
 	}
 	if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP)
-		pr_warn("BTRFS: unrecognized super flag: %llu\n",
+		btrfs_warn(fs_info, "unrecognized super flag: %llu",
 				btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP);
 	if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) {
-		pr_err("BTRFS: tree_root level too big: %d >= %d\n",
+		btrfs_err(fs_info, "tree_root level too big: %d >= %d",
 				btrfs_super_root_level(sb), BTRFS_MAX_LEVEL);
 		ret = -EINVAL;
 	}
 	if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) {
-		pr_err("BTRFS: chunk_root level too big: %d >= %d\n",
+		btrfs_err(fs_info, "chunk_root level too big: %d >= %d",
 				btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL);
 		ret = -EINVAL;
 	}
 	if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) {
-		pr_err("BTRFS: log_root level too big: %d >= %d\n",
+		btrfs_err(fs_info, "log_root level too big: %d >= %d",
 				btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL);
 		ret = -EINVAL;
 	}
@@ -4142,47 +4143,48 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	 */
 	if (!is_power_of_2(sectorsize) || sectorsize < 4096 ||
 	    sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) {
-		pr_err("BTRFS: invalid sectorsize %llu\n", sectorsize);
+		btrfs_err(fs_info, "invalid sectorsize %llu", sectorsize);
 		ret = -EINVAL;
 	}
 	/* Only PAGE SIZE is supported yet */
 	if (sectorsize != PAGE_SIZE) {
-		pr_err("BTRFS: sectorsize %llu not supported yet, only support %lu\n",
-				sectorsize, PAGE_SIZE);
+		btrfs_err(fs_info,
+			"sectorsize %llu not supported yet, only support %lu",
+			sectorsize, PAGE_SIZE);
 		ret = -EINVAL;
 	}
 	if (!is_power_of_2(nodesize) || nodesize < sectorsize ||
 	    nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) {
-		pr_err("BTRFS: invalid nodesize %llu\n", nodesize);
+		btrfs_err(fs_info, "invalid nodesize %llu", nodesize);
 		ret = -EINVAL;
 	}
 	if (nodesize != le32_to_cpu(sb->__unused_leafsize)) {
-		pr_err("BTRFS: invalid leafsize %u, should be %llu\n",
-				le32_to_cpu(sb->__unused_leafsize),
-				nodesize);
+		btrfs_err(fs_info, "invalid leafsize %u, should be %llu",
+			  le32_to_cpu(sb->__unused_leafsize), nodesize);
 		ret = -EINVAL;
 	}
 
 	/* Root alignment check */
 	if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) {
-		pr_warn("BTRFS: tree_root block unaligned: %llu\n",
-				btrfs_super_root(sb));
+		btrfs_warn(fs_info, "tree_root block unaligned: %llu",
+			   btrfs_super_root(sb));
 		ret = -EINVAL;
 	}
 	if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) {
-		pr_warn("BTRFS: chunk_root block unaligned: %llu\n",
-				btrfs_super_chunk_root(sb));
+		btrfs_warn(fs_info, "chunk_root block unaligned: %llu",
+			   btrfs_super_chunk_root(sb));
 		ret = -EINVAL;
 	}
 	if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) {
-		pr_warn("BTRFS: log_root block unaligned: %llu\n",
-				btrfs_super_log_root(sb));
+		btrfs_warn(fs_info, "log_root block unaligned: %llu",
+			   btrfs_super_log_root(sb));
 		ret = -EINVAL;
 	}
 
 	if (memcmp(fs_info->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) {
-		pr_err("BTRFS: dev_item UUID does not match fsid: %pU != %pU\n",
-				fs_info->fsid, sb->dev_item.fsid);
+		btrfs_err(fs_info,
+			   "dev_item UUID does not match fsid: %pU != %pU",
+			   fs_info->fsid, sb->dev_item.fsid);
 		ret = -EINVAL;
 	}
 
@@ -4192,25 +4194,25 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	 */
 	if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) {
 		btrfs_err(fs_info, "bytes_used is too small %llu",
-		       btrfs_super_bytes_used(sb));
+			  btrfs_super_bytes_used(sb));
 		ret = -EINVAL;
 	}
 	if (!is_power_of_2(btrfs_super_stripesize(sb))) {
 		btrfs_err(fs_info, "invalid stripesize %u",
-		       btrfs_super_stripesize(sb));
+			  btrfs_super_stripesize(sb));
 		ret = -EINVAL;
 	}
 	if (btrfs_super_num_devices(sb) > (1UL << 31))
-		pr_warn("BTRFS: suspicious number of devices: %llu\n",
-				btrfs_super_num_devices(sb));
+		btrfs_warn(fs_info, "suspicious number of devices: %llu",
+			   btrfs_super_num_devices(sb));
 	if (btrfs_super_num_devices(sb) == 0) {
-		pr_err("BTRFS: number of devices is 0\n");
+		btrfs_err(fs_info, "number of devices is 0");
 		ret = -EINVAL;
 	}
 
 	if (btrfs_super_bytenr(sb) != BTRFS_SUPER_INFO_OFFSET) {
-		pr_err("BTRFS: super offset mismatch %llu != %u\n",
-				btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET);
+		btrfs_err(fs_info, "super offset mismatch %llu != %u",
+			  btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET);
 		ret = -EINVAL;
 	}
 
@@ -4219,17 +4221,17 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	 * and one chunk
 	 */
 	if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) {
-		pr_err("BTRFS: system chunk array too big %u > %u\n",
-				btrfs_super_sys_array_size(sb),
-				BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
+		btrfs_err(fs_info, "system chunk array too big %u > %u",
+			  btrfs_super_sys_array_size(sb),
+			  BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
 		ret = -EINVAL;
 	}
 	if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key)
 			+ sizeof(struct btrfs_chunk)) {
-		pr_err("BTRFS: system chunk array too small %u < %zu\n",
-				btrfs_super_sys_array_size(sb),
-				sizeof(struct btrfs_disk_key)
-				+ sizeof(struct btrfs_chunk));
+		btrfs_err(fs_info, "system chunk array too small %u < %zu",
+			  btrfs_super_sys_array_size(sb),
+			  sizeof(struct btrfs_disk_key)
+			  + sizeof(struct btrfs_chunk));
 		ret = -EINVAL;
 	}
 
@@ -4238,12 +4240,16 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	 * but it's still possible that it's the one that's wrong.
 	 */
 	if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb))
-		pr_warn("BTRFS: suspicious: generation < chunk_root_generation: %llu < %llu\n",
-			btrfs_super_generation(sb), btrfs_super_chunk_root_generation(sb));
+		btrfs_warn(fs_info,
+			"suspicious: generation < chunk_root_generation: %llu < %llu",
+			btrfs_super_generation(sb),
+			btrfs_super_chunk_root_generation(sb));
 	if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb)
 	    && btrfs_super_cache_generation(sb) != (u64)-1)
-		pr_warn("BTRFS: suspicious: generation < cache_generation: %llu < %llu\n",
-			btrfs_super_generation(sb), btrfs_super_cache_generation(sb));
+		btrfs_warn(fs_info,
+			"suspicious: generation < cache_generation: %llu < %llu",
+			btrfs_super_generation(sb),
+			btrfs_super_cache_generation(sb));
 
 	return ret;
 }

fs/btrfs/extent-tree.c

@@ -87,7 +87,8 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans,
 			  int force);
 static int find_next_key(struct btrfs_path *path, int level,
 			 struct btrfs_key *key);
-static void dump_space_info(struct btrfs_space_info *info, u64 bytes,
+static void dump_space_info(struct btrfs_fs_info *fs_info,
+			    struct btrfs_space_info *info, u64 bytes,
 			    int dump_block_groups);
 static int btrfs_add_reserved_bytes(struct btrfs_block_group_cache *cache,
 				    u64 ram_bytes, u64 num_bytes, int delalloc);
@@ -266,9 +267,8 @@ static int exclude_super_stripes(struct btrfs_root *root,
 
 	for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
 		bytenr = btrfs_sb_offset(i);
-		ret = btrfs_rmap_block(&root->fs_info->mapping_tree,
-				       cache->key.objectid, bytenr,
-				       0, &logical, &nr, &stripe_len);
+		ret = btrfs_rmap_block(root->fs_info, cache->key.objectid,
+				       bytenr, 0, &logical, &nr, &stripe_len);
 		if (ret)
 			return ret;
 
@@ -4432,7 +4432,7 @@ void check_system_chunk(struct btrfs_trans_handle *trans,
 	if (left < thresh && btrfs_test_opt(root->fs_info, ENOSPC_DEBUG)) {
 		btrfs_info(root->fs_info, "left=%llu, need=%llu, flags=%llu",
 			left, thresh, type);
-		dump_space_info(info, 0, 0);
+		dump_space_info(root->fs_info, info, 0, 0);
 	}
 
 	if (left < thresh) {
@@ -7907,22 +7907,24 @@ out:
 	return ret;
 }
 
-static void dump_space_info(struct btrfs_space_info *info, u64 bytes,
+static void dump_space_info(struct btrfs_fs_info *fs_info,
+			    struct btrfs_space_info *info, u64 bytes,
 			    int dump_block_groups)
 {
 	struct btrfs_block_group_cache *cache;
 	int index = 0;
 
 	spin_lock(&info->lock);
-	pr_info("BTRFS: space_info %llu has %llu free, is %sfull\n",
-	       info->flags,
-	       info->total_bytes - info->bytes_used - info->bytes_pinned -
-	       info->bytes_reserved - info->bytes_readonly -
-	       info->bytes_may_use, (info->full) ? "" : "not ");
-	pr_info("BTRFS: space_info total=%llu, used=%llu, pinned=%llu, reserved=%llu, may_use=%llu, readonly=%llu\n",
-	       info->total_bytes, info->bytes_used, info->bytes_pinned,
-	       info->bytes_reserved, info->bytes_may_use,
-	       info->bytes_readonly);
+	btrfs_info(fs_info, "space_info %llu has %llu free, is %sfull",
+		   info->flags,
+		   info->total_bytes - info->bytes_used - info->bytes_pinned -
+		   info->bytes_reserved - info->bytes_readonly -
+		   info->bytes_may_use, (info->full) ? "" : "not ");
+	btrfs_info(fs_info,
+		"space_info total=%llu, used=%llu, pinned=%llu, reserved=%llu, may_use=%llu, readonly=%llu",
+		info->total_bytes, info->bytes_used, info->bytes_pinned,
+		info->bytes_reserved, info->bytes_may_use,
+		info->bytes_readonly);
 	spin_unlock(&info->lock);
 
 	if (!dump_block_groups)
@@ -7932,10 +7934,11 @@ static void dump_space_info(struct btrfs_space_info *info, u64 bytes,
 again:
 	list_for_each_entry(cache, &info->block_groups[index], list) {
 		spin_lock(&cache->lock);
-		pr_info("BTRFS: block group %llu has %llu bytes, %llu used %llu pinned %llu reserved %s\n",
-		       cache->key.objectid, cache->key.offset,
-		       btrfs_block_group_used(&cache->item), cache->pinned,
-		       cache->reserved, cache->ro ? "[readonly]" : "");
+		btrfs_info(fs_info,
+			"block group %llu has %llu bytes, %llu used %llu pinned %llu reserved %s",
+			cache->key.objectid, cache->key.offset,
+			btrfs_block_group_used(&cache->item), cache->pinned,
+			cache->reserved, cache->ro ? "[readonly]" : "");
 		btrfs_dump_free_space(cache, bytes);
 		spin_unlock(&cache->lock);
 	}
@@ -7949,6 +7952,7 @@ int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes,
 			 u64 empty_size, u64 hint_byte,
 			 struct btrfs_key *ins, int is_data, int delalloc)
 {
+	struct btrfs_fs_info *fs_info = root->fs_info;
 	bool final_tried = num_bytes == min_alloc_size;
 	u64 flags;
 	int ret;
@@ -7959,8 +7963,7 @@ again:
 	ret = find_free_extent(root, ram_bytes, num_bytes, empty_size,
 			       hint_byte, ins, flags, delalloc);
 	if (!ret && !is_data) {
-		btrfs_dec_block_group_reservations(root->fs_info,
-						   ins->objectid);
+		btrfs_dec_block_group_reservations(fs_info, ins->objectid);
 	} else if (ret == -ENOSPC) {
 		if (!final_tried && ins->offset) {
 			num_bytes = min(num_bytes >> 1, ins->offset);
@@ -7970,15 +7973,15 @@ again:
 			if (num_bytes == min_alloc_size)
 				final_tried = true;
 			goto again;
-		} else if (btrfs_test_opt(root->fs_info, ENOSPC_DEBUG)) {
+		} else if (btrfs_test_opt(fs_info, ENOSPC_DEBUG)) {
 			struct btrfs_space_info *sinfo;
 
-			sinfo = __find_space_info(root->fs_info, flags);
+			sinfo = __find_space_info(fs_info, flags);
 			btrfs_err(root->fs_info,
 				  "allocation failed flags %llu, wanted %llu",
 				  flags, num_bytes);
 			if (sinfo)
-				dump_space_info(sinfo, num_bytes, 1);
+				dump_space_info(fs_info, sinfo, num_bytes, 1);
 		}
 	}
 
@@ -9178,9 +9181,10 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 			 struct btrfs_block_rsv *block_rsv, int update_ref,
 			 int for_reloc)
 {
+	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_path *path;
 	struct btrfs_trans_handle *trans;
-	struct btrfs_root *tree_root = root->fs_info->tree_root;
+	struct btrfs_root *tree_root = fs_info->tree_root;
 	struct btrfs_root_item *root_item = &root->root_item;
 	struct walk_control *wc;
 	struct btrfs_key key;
@@ -9189,7 +9193,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 	int level;
 	bool root_dropped = false;
 
-	btrfs_debug(root->fs_info, "Drop subvolume %llu", root->objectid);
+	btrfs_debug(fs_info, "Drop subvolume %llu", root->objectid);
 
 	path = btrfs_alloc_path();
 	if (!path) {
@@ -9318,7 +9322,8 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 
 			btrfs_end_transaction_throttle(trans, tree_root);
 			if (!for_reloc && btrfs_need_cleaner_sleep(root)) {
-				pr_debug("BTRFS: drop snapshot early exit\n");
+				btrfs_debug(fs_info,
+					    "drop snapshot early exit");
 				err = -EAGAIN;
 				goto out_free;
 			}
@@ -9384,7 +9389,7 @@ out:
 	if (!for_reloc && root_dropped == false)
 		btrfs_add_dead_root(root);
 	if (err && err != -EAGAIN)
-		btrfs_handle_fs_error(root->fs_info, err, NULL);
+		btrfs_handle_fs_error(fs_info, err, NULL);
 	return err;
 }
 
@@ -10018,7 +10023,7 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info)
 		if (WARN_ON(space_info->bytes_pinned > 0 ||
 			    space_info->bytes_reserved > 0 ||
 			    space_info->bytes_may_use > 0))
-			dump_space_info(space_info, 0, 0);
+			dump_space_info(info, space_info, 0, 0);
 		list_del(&space_info->list);
 		for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
 			struct kobject *kobj;
@@ -10067,7 +10072,8 @@ static void __link_block_group(struct btrfs_space_info *space_info,
 
 	return;
 out_err:
-	pr_warn("BTRFS: failed to add kobject for block cache. ignoring.\n");
+	btrfs_warn(cache->fs_info,
+		   "failed to add kobject for block cache, ignoring");
 }
 
 static struct btrfs_block_group_cache *

fs/btrfs/extent_io.c

@@ -2120,8 +2120,9 @@ int clean_io_failure(struct inode *inode, u64 start, struct page *page,
 
 	if (failrec->in_validation) {
 		/* there was no real error, just free the record */
-		pr_debug("clean_io_failure: freeing dummy error at %llu\n",
-			 failrec->start);
+		btrfs_debug(fs_info,
+			"clean_io_failure: freeing dummy error at %llu",
+			failrec->start);
 		goto out;
 	}
 	if (fs_info->sb->s_flags & MS_RDONLY)
@@ -2187,6 +2188,7 @@ void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end)
 int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
 		struct io_failure_record **failrec_ret)
 {
+	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	struct io_failure_record *failrec;
 	struct extent_map *em;
 	struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree;
@@ -2234,8 +2236,9 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
 						 em->compress_type);
 		}
 
-		pr_debug("Get IO Failure Record: (new) logical=%llu, start=%llu, len=%llu\n",
-			 logical, start, failrec->len);
+		btrfs_debug(fs_info,
+			"Get IO Failure Record: (new) logical=%llu, start=%llu, len=%llu",
+			logical, start, failrec->len);
 
 		failrec->logical = logical;
 		free_extent_map(em);
@@ -2253,9 +2256,10 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
 			return ret;
 		}
 	} else {
-		pr_debug("Get IO Failure Record: (found) logical=%llu, start=%llu, len=%llu, validation=%d\n",
-			 failrec->logical, failrec->start, failrec->len,
-			 failrec->in_validation);
+		btrfs_debug(fs_info,
+			"Get IO Failure Record: (found) logical=%llu, start=%llu, len=%llu, validation=%d",
+			failrec->logical, failrec->start, failrec->len,
+			failrec->in_validation);
 		/*
 		 * when data can be on disk more than twice, add to failrec here
 		 * (e.g. with a list for failed_mirror) to make
@@ -2271,18 +2275,19 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
 int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio,
 			   struct io_failure_record *failrec, int failed_mirror)
 {
+	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	int num_copies;
 
-	num_copies = btrfs_num_copies(BTRFS_I(inode)->root->fs_info,
-				      failrec->logical, failrec->len);
+	num_copies = btrfs_num_copies(fs_info, failrec->logical, failrec->len);
 	if (num_copies == 1) {
 		/*
 		 * we only have a single copy of the data, so don't bother with
 		 * all the retry and error correction code that follows. no
 		 * matter what the error is, it is very likely to persist.
 		 */
-		pr_debug("Check Repairable: cannot repair, num_copies=%d, next_mirror %d, failed_mirror %d\n",
-			 num_copies, failrec->this_mirror, failed_mirror);
+		btrfs_debug(fs_info,
+			"Check Repairable: cannot repair, num_copies=%d, next_mirror %d, failed_mirror %d",
+			num_copies, failrec->this_mirror, failed_mirror);
 		return 0;
 	}
 
@@ -2321,8 +2326,9 @@ int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio,
 	}
 
 	if (failrec->this_mirror > num_copies) {
-		pr_debug("Check Repairable: (fail) num_copies=%d, next_mirror %d, failed_mirror %d\n",
-			 num_copies, failrec->this_mirror, failed_mirror);
+		btrfs_debug(fs_info,
+			"Check Repairable: (fail) num_copies=%d, next_mirror %d, failed_mirror %d",
+			num_copies, failrec->this_mirror, failed_mirror);
 		return 0;
 	}
 
@@ -2413,8 +2419,9 @@ static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset,
 	}
 	bio_set_op_attrs(bio, REQ_OP_READ, read_mode);
 
-	pr_debug("Repair Read Error: submitting new read[%#x] to this_mirror=%d, in_validation=%d\n",
-		 read_mode, failrec->this_mirror, failrec->in_validation);
+	btrfs_debug(btrfs_sb(inode->i_sb),
+		"Repair Read Error: submitting new read[%#x] to this_mirror=%d, in_validation=%d",
+		read_mode, failrec->this_mirror, failrec->in_validation);
 
 	ret = tree->ops->submit_bio_hook(inode, bio, failrec->this_mirror,
 					 failrec->bio_flags, 0);
@@ -2538,10 +2545,12 @@ static void end_bio_extent_readpage(struct bio *bio)
 	bio_for_each_segment_all(bvec, bio, i) {
 		struct page *page = bvec->bv_page;
 		struct inode *inode = page->mapping->host;
+		struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 
-		pr_debug("end_bio_extent_readpage: bi_sector=%llu, err=%d, mirror=%u\n",
-			 (u64)bio->bi_iter.bi_sector,
-			 bio->bi_error, io_bio->mirror_num);
+		btrfs_debug(fs_info,
+			"end_bio_extent_readpage: bi_sector=%llu, err=%d, mirror=%u",
+			(u64)bio->bi_iter.bi_sector, bio->bi_error,
+			io_bio->mirror_num);
 		tree = &BTRFS_I(inode)->io_tree;
 
 		/* We always issue full-page reads, but if some block
@@ -2551,12 +2560,12 @@ static void end_bio_extent_readpage(struct bio *bio)
 		 * if they don't add up to a full page.  */
 		if (bvec->bv_offset || bvec->bv_len != PAGE_SIZE) {
 			if (bvec->bv_offset + bvec->bv_len != PAGE_SIZE)
-				btrfs_err(BTRFS_I(page->mapping->host)->root->fs_info,
-				   "partial page read in btrfs with offset %u and length %u",
+				btrfs_err(fs_info,
+					"partial page read in btrfs with offset %u and length %u",
 					bvec->bv_offset, bvec->bv_len);
 			else
-				btrfs_info(BTRFS_I(page->mapping->host)->root->fs_info,
-				   "incomplete page read in btrfs with offset %u and length %u",
+				btrfs_info(fs_info,
+					"incomplete page read in btrfs with offset %u and length %u",
 					bvec->bv_offset, bvec->bv_len);
 		}
 

fs/btrfs/free-space-cache.c

@@ -2299,7 +2299,8 @@ static void steal_from_bitmap(struct btrfs_free_space_ctl *ctl,
 	}
 }
 
-int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
+int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
+			   struct btrfs_free_space_ctl *ctl,
 			   u64 offset, u64 bytes)
 {
 	struct btrfs_free_space *info;
@@ -2346,7 +2347,7 @@ out:
 	spin_unlock(&ctl->tree_lock);
 
 	if (ret) {
-		pr_crit("BTRFS: unable to add free space :%d\n", ret);
+		btrfs_crit(fs_info, "unable to add free space :%d", ret);
 		ASSERT(ret != -EEXIST);
 	}
 
@@ -2622,7 +2623,8 @@ out:
 	spin_unlock(&ctl->tree_lock);
 
 	if (align_gap_len)
-		__btrfs_add_free_space(ctl, align_gap, align_gap_len);
+		__btrfs_add_free_space(block_group->fs_info, ctl,
+				       align_gap, align_gap_len);
 	return ret;
 }
 

fs/btrfs/free-space-cache.h

@@ -89,13 +89,15 @@ int btrfs_write_out_ino_cache(struct btrfs_root *root,
 			      struct inode *inode);
 
 void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
-int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
+int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
+			   struct btrfs_free_space_ctl *ctl,
 			   u64 bytenr, u64 size);
 static inline int
 btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
 		     u64 bytenr, u64 size)
 {
-	return __btrfs_add_free_space(block_group->free_space_ctl,
+	return __btrfs_add_free_space(block_group->fs_info,
+				      block_group->free_space_ctl,
 				      bytenr, size);
 }
 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,

fs/btrfs/free-space-tree.c

@@ -107,7 +107,7 @@ search_free_space_info(struct btrfs_trans_handle *trans,
 	if (ret < 0)
 		return ERR_PTR(ret);
 	if (ret != 0) {
-		btrfs_warn(fs_info, "missing free space info for %llu\n",
+		btrfs_warn(fs_info, "missing free space info for %llu",
 			   block_group->key.objectid);
 		ASSERT(0);
 		return ERR_PTR(-ENOENT);

fs/btrfs/inode-map.c

@@ -104,7 +104,7 @@ again:
 			break;
 
 		if (last != (u64)-1 && last + 1 != key.objectid) {
-			__btrfs_add_free_space(ctl, last + 1,
+			__btrfs_add_free_space(fs_info, ctl, last + 1,
 					       key.objectid - last - 1);
 			wake_up(&root->ino_cache_wait);
 		}
@@ -115,7 +115,7 @@ next:
 	}
 
 	if (last < root->highest_objectid - 1) {
-		__btrfs_add_free_space(ctl, last + 1,
+		__btrfs_add_free_space(fs_info, ctl, last + 1,
 				       root->highest_objectid - last - 1);
 	}
 
@@ -136,12 +136,13 @@ out:
 
 static void start_caching(struct btrfs_root *root)
 {
+	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_free_space_ctl *ctl = root->free_ino_ctl;
 	struct task_struct *tsk;
 	int ret;
 	u64 objectid;
 
-	if (!btrfs_test_opt(root->fs_info, INODE_MAP_CACHE))
+	if (!btrfs_test_opt(fs_info, INODE_MAP_CACHE))
 		return;
 
 	spin_lock(&root->ino_cache_lock);
@@ -153,7 +154,7 @@ static void start_caching(struct btrfs_root *root)
 	root->ino_cache_state = BTRFS_CACHE_STARTED;
 	spin_unlock(&root->ino_cache_lock);
 
-	ret = load_free_ino_cache(root->fs_info, root);
+	ret = load_free_ino_cache(fs_info, root);
 	if (ret == 1) {
 		spin_lock(&root->ino_cache_lock);
 		root->ino_cache_state = BTRFS_CACHE_FINISHED;
@@ -170,15 +171,15 @@ static void start_caching(struct btrfs_root *root)
 	 */
 	ret = btrfs_find_free_objectid(root, &objectid);
 	if (!ret && objectid <= BTRFS_LAST_FREE_OBJECTID) {
-		__btrfs_add_free_space(ctl, objectid,
+		__btrfs_add_free_space(fs_info, ctl, objectid,
 				       BTRFS_LAST_FREE_OBJECTID - objectid + 1);
 	}
 
 	tsk = kthread_run(caching_kthread, root, "btrfs-ino-cache-%llu",
 			  root->root_key.objectid);
 	if (IS_ERR(tsk)) {
-		btrfs_warn(root->fs_info, "failed to start inode caching task");
-		btrfs_clear_pending_and_info(root->fs_info, INODE_MAP_CACHE,
+		btrfs_warn(fs_info, "failed to start inode caching task");
+		btrfs_clear_pending_and_info(fs_info, INODE_MAP_CACHE,
 				"disabling inode map caching");
 	}
 }
@@ -209,28 +210,29 @@ again:
 
 void btrfs_return_ino(struct btrfs_root *root, u64 objectid)
 {
+	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_free_space_ctl *pinned = root->free_ino_pinned;
 
-	if (!btrfs_test_opt(root->fs_info, INODE_MAP_CACHE))
+	if (!btrfs_test_opt(fs_info, INODE_MAP_CACHE))
 		return;
 again:
 	if (root->ino_cache_state == BTRFS_CACHE_FINISHED) {
-		__btrfs_add_free_space(pinned, objectid, 1);
+		__btrfs_add_free_space(fs_info, pinned, objectid, 1);
 	} else {
-		down_write(&root->fs_info->commit_root_sem);
+		down_write(&fs_info->commit_root_sem);
 		spin_lock(&root->ino_cache_lock);
 		if (root->ino_cache_state == BTRFS_CACHE_FINISHED) {
 			spin_unlock(&root->ino_cache_lock);
-			up_write(&root->fs_info->commit_root_sem);
+			up_write(&fs_info->commit_root_sem);
 			goto again;
 		}
 		spin_unlock(&root->ino_cache_lock);
 
 		start_caching(root);
 
-		__btrfs_add_free_space(pinned, objectid, 1);
+		__btrfs_add_free_space(fs_info, pinned, objectid, 1);
 
-		up_write(&root->fs_info->commit_root_sem);
+		up_write(&fs_info->commit_root_sem);
 	}
 }
 
@@ -277,7 +279,8 @@ void btrfs_unpin_free_ino(struct btrfs_root *root)
 		rb_erase(&info->offset_index, rbroot);
 		spin_unlock(rbroot_lock);
 		if (add_to_ctl)
-			__btrfs_add_free_space(ctl, info->offset, count);
+			__btrfs_add_free_space(root->fs_info, ctl,
+					       info->offset, count);
 		kmem_cache_free(btrfs_free_space_cachep, info);
 	}
 }

fs/btrfs/inode.c

@@ -2321,7 +2321,7 @@ static noinline int record_one_backref(u64 inum, u64 offset, u64 root_id,
 		if (PTR_ERR(root) == -ENOENT)
 			return 0;
 		WARN_ON(1);
-		pr_debug("inum=%llu, offset=%llu, root_id=%llu\n",
+		btrfs_debug(fs_info, "inum=%llu, offset=%llu, root_id=%llu",
 			 inum, offset, root_id);
 		return PTR_ERR(root);
 	}
@@ -7878,18 +7878,19 @@ static int btrfs_check_dio_repairable(struct inode *inode,
 				      struct io_failure_record *failrec,
 				      int failed_mirror)
 {
+	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	int num_copies;
 
-	num_copies = btrfs_num_copies(BTRFS_I(inode)->root->fs_info,
-				      failrec->logical, failrec->len);
+	num_copies = btrfs_num_copies(fs_info, failrec->logical, failrec->len);
 	if (num_copies == 1) {
 		/*
 		 * we only have a single copy of the data, so don't bother with
 		 * all the retry and error correction code that follows. no
 		 * matter what the error is, it is very likely to persist.
 		 */
-		pr_debug("Check DIO Repairable: cannot repair, num_copies=%d, next_mirror %d, failed_mirror %d\n",
-			 num_copies, failrec->this_mirror, failed_mirror);
+		btrfs_debug(fs_info,
+			"Check DIO Repairable: cannot repair, num_copies=%d, next_mirror %d, failed_mirror %d",
+			num_copies, failrec->this_mirror, failed_mirror);
 		return 0;
 	}
 
@@ -7899,8 +7900,9 @@ static int btrfs_check_dio_repairable(struct inode *inode,
 		failrec->this_mirror++;
 
 	if (failrec->this_mirror > num_copies) {
-		pr_debug("Check DIO Repairable: (fail) num_copies=%d, next_mirror %d, failed_mirror %d\n",
-			 num_copies, failrec->this_mirror, failed_mirror);
+		btrfs_debug(fs_info,
+			"Check DIO Repairable: (fail) num_copies=%d, next_mirror %d, failed_mirror %d",
+			num_copies, failrec->this_mirror, failed_mirror);
 		return 0;
 	}
 

fs/btrfs/qgroup.c

@@ -2257,10 +2257,11 @@ qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
 					 &fs_info->qgroup_rescan_progress,
 					 path, 1, 0);
 
-	pr_debug("current progress key (%llu %u %llu), search_slot ret %d\n",
-		 fs_info->qgroup_rescan_progress.objectid,
-		 fs_info->qgroup_rescan_progress.type,
-		 fs_info->qgroup_rescan_progress.offset, ret);
+	btrfs_debug(fs_info,
+		"current progress key (%llu %u %llu), search_slot ret %d",
+		fs_info->qgroup_rescan_progress.objectid,
+		fs_info->qgroup_rescan_progress.type,
+		fs_info->qgroup_rescan_progress.offset, ret);
 
 	if (ret) {
 		/*
@@ -2390,7 +2391,7 @@ out:
 	ret = update_qgroup_status_item(trans, fs_info, fs_info->quota_root);
 	if (ret < 0) {
 		err = ret;
-		btrfs_err(fs_info, "fail to update qgroup status: %d\n", err);
+		btrfs_err(fs_info, "fail to update qgroup status: %d", err);
 	}
 	btrfs_end_transaction(trans, fs_info->quota_root);
 

fs/btrfs/reada.c

@@ -820,7 +820,7 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
 
 	spin_lock(&fs_info->reada_lock);
 	list_for_each_entry(device, &fs_devices->devices, dev_list) {
-		pr_debug("dev %lld has %d in flight\n", device->devid,
+		btrfs_debug(fs_info, "dev %lld has %d in flight", device->devid,
 			atomic_read(&device->reada_in_flight));
 		index = 0;
 		while (1) {
@@ -830,8 +830,8 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
 			if (ret == 0)
 				break;
 			pr_debug("  zone %llu-%llu elems %llu locked %d devs",
-			       zone->start, zone->end, zone->elems,
-			       zone->locked);
+				    zone->start, zone->end, zone->elems,
+				    zone->locked);
 			for (j = 0; j < zone->ndevs; ++j) {
 				pr_cont(" %lld",
 					zone->devs[j]->devid);

fs/btrfs/super.c

@@ -1148,7 +1148,7 @@ static int btrfs_fill_super(struct super_block *sb,
 	sb->s_iflags |= SB_I_CGROUPWB;
 	err = open_ctree(sb, fs_devices, (char *)data);
 	if (err) {
-		pr_err("BTRFS: open_ctree failed\n");
+		btrfs_err(fs_info, "open_ctree failed");
 		return err;
 	}
 
@@ -1446,12 +1446,13 @@ static struct dentry *mount_subvol(const char *subvol_name, u64 subvol_objectid,
 
 	if (!IS_ERR(root)) {
 		struct super_block *s = root->d_sb;
+		struct btrfs_fs_info *fs_info = btrfs_sb(s);
 		struct inode *root_inode = d_inode(root);
 		u64 root_objectid = BTRFS_I(root_inode)->root->root_key.objectid;
 
 		ret = 0;
 		if (!is_subvolume_inode(root_inode)) {
-			pr_err("BTRFS: '%s' is not a valid subvolume\n",
+			btrfs_err(fs_info, "'%s' is not a valid subvolume",
 			       subvol_name);
 			ret = -EINVAL;
 		}
@@ -1461,8 +1462,9 @@ static struct dentry *mount_subvol(const char *subvol_name, u64 subvol_objectid,
 			 * subvolume which was passed by ID is renamed and
 			 * another subvolume is renamed over the old location.
 			 */
-			pr_err("BTRFS: subvol '%s' does not match subvolid %llu\n",
-			       subvol_name, subvol_objectid);
+			btrfs_err(fs_info,
+				  "subvol '%s' does not match subvolid %llu",
+				  subvol_name, subvol_objectid);
 			ret = -EINVAL;
 		}
 		if (ret) {

fs/btrfs/transaction.c

@@ -65,8 +65,9 @@ void btrfs_put_transaction(struct btrfs_transaction *transaction)
 		BUG_ON(!list_empty(&transaction->list));
 		WARN_ON(!RB_EMPTY_ROOT(&transaction->delayed_refs.href_root));
 		if (transaction->delayed_refs.pending_csums)
-			pr_err("pending csums is %llu\n",
-			       transaction->delayed_refs.pending_csums);
+			btrfs_err(transaction->fs_info,
+				  "pending csums is %llu",
+				  transaction->delayed_refs.pending_csums);
 		while (!list_empty(&transaction->pending_chunks)) {
 			struct extent_map *em;
 
@@ -245,6 +246,7 @@ loop:
 		return -EROFS;
 	}
 
+	cur_trans->fs_info = fs_info;
 	atomic_set(&cur_trans->num_writers, 1);
 	extwriter_counter_init(cur_trans, type);
 	init_waitqueue_head(&cur_trans->writer_wait);
@@ -1294,11 +1296,11 @@ int btrfs_defrag_root(struct btrfs_root *root)
 		btrfs_btree_balance_dirty(info->tree_root);
 		cond_resched();
 
-		if (btrfs_fs_closing(root->fs_info) || ret != -EAGAIN)
+		if (btrfs_fs_closing(info) || ret != -EAGAIN)
 			break;
 
-		if (btrfs_defrag_cancelled(root->fs_info)) {
-			pr_debug("BTRFS: defrag_root cancelled\n");
+		if (btrfs_defrag_cancelled(info)) {
+			btrfs_debug(info, "defrag_root cancelled");
 			ret = -EAGAIN;
 			break;
 		}
@@ -2321,7 +2323,7 @@ int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root)
 	list_del_init(&root->root_list);
 	spin_unlock(&fs_info->trans_lock);
 
-	pr_debug("BTRFS: cleaner removing %llu\n", root->objectid);
+	btrfs_debug(fs_info, "cleaner removing %llu", root->objectid);
 
 	btrfs_kill_all_delayed_nodes(root);
 

fs/btrfs/transaction.h

@@ -82,6 +82,7 @@ struct btrfs_transaction {
 	spinlock_t dropped_roots_lock;
 	struct btrfs_delayed_ref_root delayed_refs;
 	int aborted;
+	struct btrfs_fs_info *fs_info;
 };
 
 #define __TRANS_FREEZABLE	(1U << 0)

fs/btrfs/volumes.c

@@ -5888,10 +5888,11 @@ int btrfs_map_sblock(struct btrfs_fs_info *fs_info, int op,
 				 mirror_num, need_raid_map);
 }
 
-int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
+int btrfs_rmap_block(struct btrfs_fs_info *fs_info,
 		     u64 chunk_start, u64 physical, u64 devid,
 		     u64 **logical, int *naddrs, int *stripe_len)
 {
+	struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
 	struct extent_map_tree *em_tree = &map_tree->map_tree;
 	struct extent_map *em;
 	struct map_lookup *map;
@@ -5907,13 +5908,13 @@ int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
 	read_unlock(&em_tree->lock);
 
 	if (!em) {
-		pr_err("BTRFS: couldn't find em for chunk %Lu\n",
-		       chunk_start);
+		btrfs_err(fs_info, "couldn't find em for chunk %Lu",
+			chunk_start);
 		return -EIO;
 	}
 
 	if (em->start != chunk_start) {
-		pr_err("BTRFS: bad chunk start, em=%Lu, wanted=%Lu\n",
+		btrfs_err(fs_info, "bad chunk start, em=%Lu, wanted=%Lu",
 		       em->start, chunk_start);
 		free_extent_map(em);
 		return -EIO;
@@ -6118,10 +6119,12 @@ static void submit_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio,
 
 		rcu_read_lock();
 		name = rcu_dereference(dev->name);
-		pr_debug("btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u\n",
-			 bio_op(bio), bio->bi_opf, (u64)bio->bi_iter.bi_sector,
-			 (u_long)dev->bdev->bd_dev, name->str, dev->devid,
-			 bio->bi_iter.bi_size);
+		btrfs_debug(fs_info,
+			"btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u",
+			bio_op(bio), bio->bi_opf,
+			(u64)bio->bi_iter.bi_sector,
+			(u_long)dev->bdev->bd_dev, name->str, dev->devid,
+			bio->bi_iter.bi_size);
 		rcu_read_unlock();
 	}
 #endif
@@ -6644,7 +6647,8 @@ static int read_one_dev(struct btrfs_root *root,
 
 int btrfs_read_sys_array(struct btrfs_root *root)
 {
-	struct btrfs_super_block *super_copy = root->fs_info->super_copy;
+	struct btrfs_fs_info *fs_info = root->fs_info;
+	struct btrfs_super_block *super_copy = fs_info->super_copy;
 	struct extent_buffer *sb;
 	struct btrfs_disk_key *disk_key;
 	struct btrfs_chunk *chunk;
@@ -6715,7 +6719,8 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 
 			num_stripes = btrfs_chunk_num_stripes(sb, chunk);
 			if (!num_stripes) {
-				pr_err("BTRFS: invalid number of stripes %u in sys_array at offset %u\n",
+				btrfs_err(fs_info,
+					"invalid number of stripes %u in sys_array at offset %u",
 					num_stripes, cur_offset);
 				ret = -EIO;
 				break;
@@ -6723,7 +6728,7 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 
 			type = btrfs_chunk_type(sb, chunk);
 			if ((type & BTRFS_BLOCK_GROUP_SYSTEM) == 0) {
-				btrfs_err(root->fs_info,
+				btrfs_err(fs_info,
 			    "invalid chunk type %llu in sys_array at offset %u",
 					type, cur_offset);
 				ret = -EIO;
@@ -6738,8 +6743,9 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 			if (ret)
 				break;
 		} else {
-			pr_err("BTRFS: unexpected item type %u in sys_array at offset %u\n",
-				(u32)key.type, cur_offset);
+			btrfs_err(fs_info,
+			    "unexpected item type %u in sys_array at offset %u",
+				  (u32)key.type, cur_offset);
 			ret = -EIO;
 			break;
 		}
@@ -6752,7 +6758,7 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 	return ret;
 
 out_short_read:
-	pr_err("BTRFS: sys_array too short to read %u bytes at offset %u\n",
+	btrfs_err(fs_info, "sys_array too short to read %u bytes at offset %u",
 			len, cur_offset);
 	clear_extent_buffer_uptodate(sb);
 	free_extent_buffer_stale(sb);

fs/btrfs/volumes.h

@@ -382,7 +382,7 @@ int btrfs_map_sblock(struct btrfs_fs_info *fs_info, int op,
 		     u64 logical, u64 *length,
 		     struct btrfs_bio **bbio_ret, int mirror_num,
 		     int need_raid_map);
-int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
+int btrfs_rmap_block(struct btrfs_fs_info *fs_info,
 		     u64 chunk_start, u64 physical, u64 devid,
 		     u64 **logical, int *naddrs, int *stripe_len);
 int btrfs_read_sys_array(struct btrfs_root *root);