Btrfs: skip search tree for REG files

It is really unnecessary to search tree again for @gen, @mode and @rdev
in the case of REG inodes' creation, as we've got btrfs_inode_item in sctx,
and @gen, @mode and @rdev can easily be fetched.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index ba23fef3c5e5ffb457295e5425e6717494035ce7..c2522e4e2c599a31d8b08cc2b7a1036a73936d7e 100644 (file)
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -112,6 +112,7 @@ struct send_ctx {
        int cur_inode_deleted;
        u64 cur_inode_size;
        u64 cur_inode_mode;
+       u64 cur_inode_rdev;
        u64 cur_inode_last_extent;
 
        u64 send_progress;
@@ -2439,10 +2440,16 @@ verbose_printk("btrfs: send_create_inode %llu\n", ino);
        if (!p)
                return -ENOMEM;
 
-       ret = get_inode_info(sctx->send_root, ino, NULL, &gen, &mode, NULL,
-                       NULL, &rdev);
-       if (ret < 0)
-               goto out;
+       if (ino != sctx->cur_ino) {
+               ret = get_inode_info(sctx->send_root, ino, NULL, &gen, &mode,
+                                    NULL, NULL, &rdev);
+               if (ret < 0)
+                       goto out;
+       } else {
+               gen = sctx->cur_inode_gen;
+               mode = sctx->cur_inode_mode;
+               rdev = sctx->cur_inode_rdev;
+       }
 
        if (S_ISREG(mode)) {
                cmd = BTRFS_SEND_C_MKFILE;
@@ -5027,6 +5034,8 @@ static int changed_inode(struct send_ctx *sctx,
                                sctx->left_path->nodes[0], left_ii);
                sctx->cur_inode_mode = btrfs_inode_mode(
                                sctx->left_path->nodes[0], left_ii);
+               sctx->cur_inode_rdev = btrfs_inode_rdev(
+                               sctx->left_path->nodes[0], left_ii);
                if (sctx->cur_ino != BTRFS_FIRST_FREE_OBJECTID)
                        ret = send_create_inode_if_needed(sctx);
        } else if (result == BTRFS_COMPARE_TREE_DELETED) {
@@ -5071,6 +5080,8 @@ static int changed_inode(struct send_ctx *sctx,
                                        sctx->left_path->nodes[0], left_ii);
                        sctx->cur_inode_mode = btrfs_inode_mode(
                                        sctx->left_path->nodes[0], left_ii);
+                       sctx->cur_inode_rdev = btrfs_inode_rdev(
+                                       sctx->left_path->nodes[0], left_ii);
                        ret = send_create_inode_if_needed(sctx);
                        if (ret < 0)
                                goto out;