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>

1 files changed, 15 insertions, 4 deletions

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index ba23fef3c5e5..c2522e4e2c59 100644
--- 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;