btrfs: convert send's verbose_printk to btrfs_debug

This was basically an open-coded, less flexible dynamic printk.  We can
just use btrfs_debug instead.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/send.c

@@ -36,10 +36,6 @@
 #include "transaction.h"
 #include "compression.h"
 
-static int g_verbose = 0;
-
-#define verbose_printk(...) if (g_verbose) printk(__VA_ARGS__)
-
 /*
  * A fs_path is a helper to dynamically build path names with unknown size.
  * It reallocates the internal buffer on demand.
@@ -727,9 +723,10 @@ static int send_cmd(struct send_ctx *sctx)
 static int send_rename(struct send_ctx *sctx,
 		     struct fs_path *from, struct fs_path *to)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret;
 
-verbose_printk("btrfs: send_rename %s -> %s\n", from->start, to->start);
+	btrfs_debug(fs_info, "send_rename %s -> %s", from->start, to->start);
 
 	ret = begin_cmd(sctx, BTRFS_SEND_C_RENAME);
 	if (ret < 0)
@@ -751,9 +748,10 @@ verbose_printk("btrfs: send_rename %s -> %s\n", from->start, to->start);
 static int send_link(struct send_ctx *sctx,
 		     struct fs_path *path, struct fs_path *lnk)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret;
 
-verbose_printk("btrfs: send_link %s -> %s\n", path->start, lnk->start);
+	btrfs_debug(fs_info, "send_link %s -> %s", path->start, lnk->start);
 
 	ret = begin_cmd(sctx, BTRFS_SEND_C_LINK);
 	if (ret < 0)
@@ -774,9 +772,10 @@ verbose_printk("btrfs: send_link %s -> %s\n", path->start, lnk->start);
  */
 static int send_unlink(struct send_ctx *sctx, struct fs_path *path)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret;
 
-verbose_printk("btrfs: send_unlink %s\n", path->start);
+	btrfs_debug(fs_info, "send_unlink %s", path->start);
 
 	ret = begin_cmd(sctx, BTRFS_SEND_C_UNLINK);
 	if (ret < 0)
@@ -796,9 +795,10 @@ verbose_printk("btrfs: send_unlink %s\n", path->start);
  */
 static int send_rmdir(struct send_ctx *sctx, struct fs_path *path)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret;
 
-verbose_printk("btrfs: send_rmdir %s\n", path->start);
+	btrfs_debug(fs_info, "send_rmdir %s", path->start);
 
 	ret = begin_cmd(sctx, BTRFS_SEND_C_RMDIR);
 	if (ret < 0)
@@ -1313,6 +1313,7 @@ static int find_extent_clone(struct send_ctx *sctx,
 			     u64 ino_size,
 			     struct clone_root **found)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret;
 	int extent_type;
 	u64 logical;
@@ -1371,10 +1372,10 @@ static int find_extent_clone(struct send_ctx *sctx,
 	}
 	logical = disk_byte + btrfs_file_extent_offset(eb, fi);
 
-	down_read(&sctx->send_root->fs_info->commit_root_sem);
-	ret = extent_from_logical(sctx->send_root->fs_info, disk_byte, tmp_path,
+	down_read(&fs_info->commit_root_sem);
+	ret = extent_from_logical(fs_info, disk_byte, tmp_path,
 				  &found_key, &flags);
-	up_read(&sctx->send_root->fs_info->commit_root_sem);
+	up_read(&fs_info->commit_root_sem);
 	btrfs_release_path(tmp_path);
 
 	if (ret < 0)
@@ -1429,7 +1430,7 @@ static int find_extent_clone(struct send_ctx *sctx,
 		extent_item_pos = logical - found_key.objectid;
 	else
 		extent_item_pos = 0;
-	ret = iterate_extent_inodes(sctx->send_root->fs_info,
+	ret = iterate_extent_inodes(fs_info,
 					found_key.objectid, extent_item_pos, 1,
 					__iterate_backrefs, backref_ctx);
 
@@ -1439,17 +1440,18 @@ static int find_extent_clone(struct send_ctx *sctx,
 	if (!backref_ctx->found_itself) {
 		/* found a bug in backref code? */
 		ret = -EIO;
-		btrfs_err(sctx->send_root->fs_info,
+		btrfs_err(fs_info,
 			  "did not find backref in send_root. inode=%llu, offset=%llu, disk_byte=%llu found extent=%llu",
-				ino, data_offset, disk_byte, found_key.objectid);
+			  ino, data_offset, disk_byte, found_key.objectid);
 		goto out;
 	}
 
-verbose_printk(KERN_DEBUG "btrfs: find_extent_clone: data_offset=%llu, ino=%llu, num_bytes=%llu, logical=%llu\n",
-		data_offset, ino, num_bytes, logical);
+	btrfs_debug(fs_info,
+		    "find_extent_clone: data_offset=%llu, ino=%llu, num_bytes=%llu, logical=%llu",
+		    data_offset, ino, num_bytes, logical);
 
 	if (!backref_ctx->found)
-		verbose_printk("btrfs:    no clones found\n");
+		btrfs_debug(fs_info, "no clones found");
 
 	cur_clone_root = NULL;
 	for (i = 0; i < sctx->clone_roots_cnt; i++) {
@@ -2420,10 +2422,11 @@ static int send_subvol_begin(struct send_ctx *sctx)
 
 static int send_truncate(struct send_ctx *sctx, u64 ino, u64 gen, u64 size)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p;
 
-verbose_printk("btrfs: send_truncate %llu size=%llu\n", ino, size);
+	btrfs_debug(fs_info, "send_truncate %llu size=%llu", ino, size);
 
 	p = fs_path_alloc();
 	if (!p)
@@ -2449,10 +2452,11 @@ verbose_printk("btrfs: send_truncate %llu size=%llu\n", ino, size);
 
 static int send_chmod(struct send_ctx *sctx, u64 ino, u64 gen, u64 mode)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p;
 
-verbose_printk("btrfs: send_chmod %llu mode=%llu\n", ino, mode);
+	btrfs_debug(fs_info, "send_chmod %llu mode=%llu", ino, mode);
 
 	p = fs_path_alloc();
 	if (!p)
@@ -2478,10 +2482,12 @@ verbose_printk("btrfs: send_chmod %llu mode=%llu\n", ino, mode);
 
 static int send_chown(struct send_ctx *sctx, u64 ino, u64 gen, u64 uid, u64 gid)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p;
 
-verbose_printk("btrfs: send_chown %llu uid=%llu, gid=%llu\n", ino, uid, gid);
+	btrfs_debug(fs_info, "send_chown %llu uid=%llu, gid=%llu",
+		    ino, uid, gid);
 
 	p = fs_path_alloc();
 	if (!p)
@@ -2508,6 +2514,7 @@ verbose_printk("btrfs: send_chown %llu uid=%llu, gid=%llu\n", ino, uid, gid);
 
 static int send_utimes(struct send_ctx *sctx, u64 ino, u64 gen)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p = NULL;
 	struct btrfs_inode_item *ii;
@@ -2516,7 +2523,7 @@ static int send_utimes(struct send_ctx *sctx, u64 ino, u64 gen)
 	struct btrfs_key key;
 	int slot;
 
-verbose_printk("btrfs: send_utimes %llu\n", ino);
+	btrfs_debug(fs_info, "send_utimes %llu", ino);
 
 	p = fs_path_alloc();
 	if (!p)
@@ -2570,6 +2577,7 @@ verbose_printk("btrfs: send_utimes %llu\n", ino);
  */
 static int send_create_inode(struct send_ctx *sctx, u64 ino)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p;
 	int cmd;
@@ -2577,7 +2585,7 @@ static int send_create_inode(struct send_ctx *sctx, u64 ino)
 	u64 mode;
 	u64 rdev;
 
-verbose_printk("btrfs: send_create_inode %llu\n", ino);
+	btrfs_debug(fs_info, "send_create_inode %llu", ino);
 
 	p = fs_path_alloc();
 	if (!p)
@@ -3635,6 +3643,7 @@ static int wait_for_parent_move(struct send_ctx *sctx,
  */
 static int process_recorded_refs(struct send_ctx *sctx, int *pending_move)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct recorded_ref *cur;
 	struct recorded_ref *cur2;
@@ -3647,7 +3656,7 @@ static int process_recorded_refs(struct send_ctx *sctx, int *pending_move)
 	u64 last_dir_ino_rm = 0;
 	bool can_rename = true;
 
-verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino);
+	btrfs_debug(fs_info, "process_recorded_refs %llu", sctx->cur_ino);
 
 	/*
 	 * This should never happen as the root dir always has the same ref
@@ -4657,6 +4666,7 @@ static ssize_t fill_read_buf(struct send_ctx *sctx, u64 offset, u32 len)
  */
 static int send_write(struct send_ctx *sctx, u64 offset, u32 len)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p;
 	ssize_t num_read = 0;
@@ -4665,7 +4675,7 @@ static int send_write(struct send_ctx *sctx, u64 offset, u32 len)
 	if (!p)
 		return -ENOMEM;
 
-verbose_printk("btrfs: send_write offset=%llu, len=%d\n", offset, len);
+	btrfs_debug(fs_info, "send_write offset=%llu, len=%d", offset, len);
 
 	num_read = fill_read_buf(sctx, offset, len);
 	if (num_read <= 0) {
@@ -4707,9 +4717,10 @@ static int send_clone(struct send_ctx *sctx,
 	struct fs_path *p;
 	u64 gen;
 
-verbose_printk("btrfs: send_clone offset=%llu, len=%d, clone_root=%llu, clone_inode=%llu, clone_offset=%llu\n",
-		offset, len, clone_root->root->objectid, clone_root->ino,
-		clone_root->offset);
+	btrfs_debug(sctx->send_root->fs_info,
+		    "send_clone offset=%llu, len=%d, clone_root=%llu, clone_inode=%llu, clone_offset=%llu",
+		    offset, len, clone_root->root->objectid, clone_root->ino,
+		    clone_root->offset);
 
 	p = fs_path_alloc();
 	if (!p)