@@ -5,18 +5,34 @@ Subject: [PATCH] jffs2: add RENAME_EXCHANGE support
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
---- a/fs/jffs2/dir.c
-+++ b/fs/jffs2/dir.c
-@@ -782,7 +782,7 @@ static int jffs2_rename (struct inode *o
+Index: linux-4.4.14/fs/jffs2/dir.c
+===================================================================
+--- linux-4.4.14.orig/fs/jffs2/dir.c
++++ linux-4.4.14/fs/jffs2/dir.c
+@@ -781,16 +781,29 @@ static int jffs2_rename (struct inode *o
+ struct jffs2_inode_info *victim_f = NULL;
uint8_t type;
uint32_t now;
++ struct inode *fst_inode = d_inode(old_dentry);
++ struct inode *snd_inode = d_inode(new_dentry);
- if (flags & ~RENAME_WHITEOUT)
+ if (flags & ~(RENAME_WHITEOUT | RENAME_EXCHANGE))
return -EINVAL;
++ if((flags & RENAME_EXCHANGE) && (old_dir_i != new_dir_i)) {
++ if(S_ISDIR(fst_node->i_mode) && !S_ISDIR(snd_inode->i_mode)) {
++ inc_nlink(new_dir_i);
++ drop_nlink(old_dir_i);
++ }
++ else if(!S_ISDIR(fst_node->i_mode) && S_ISDIR(snd_inode->i_mode)) {
++ drop_nlink(new_dir_i);
++ inc_nlink(old_dir_i);
++ }
++ }
++
/* The VFS will check for us and prevent trying to rename a
-@@ -790,7 +790,7 @@ static int jffs2_rename (struct inode *o
+ * file over a directory and vice versa, but if it's a directory,
* the VFS can't check whether the victim is empty. The filesystem
* needs to do that for itself.
*/
@@ -25,7 +41,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
victim_f = JFFS2_INODE_INFO(d_inode(new_dentry));
if (d_is_dir(new_dentry)) {
struct jffs2_full_dirent *fd;
-@@ -825,7 +825,7 @@ static int jffs2_rename (struct inode *o
+@@ -825,7 +838,7 @@ static int jffs2_rename (struct inode *o
if (ret)
return ret;
@@ -34,7 +50,14 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
/* There was a victim. Kill it off nicely */
if (d_is_dir(new_dentry))
clear_nlink(d_inode(new_dentry));
-@@ -851,6 +851,12 @@ static int jffs2_rename (struct inode *o
+@@ -845,12 +858,18 @@ static int jffs2_rename (struct inode *o
+
+ /* If it was a directory we moved, and there was no victim,
+ increase i_nlink on its new parent */
+- if (d_is_dir(old_dentry) && !victim_f)
++ if (d_is_dir(old_dentry) && !victim_f && !(flags & RENAME_EXCHANGE))
+ inc_nlink(new_dir_i);
+
if (flags & RENAME_WHITEOUT)
/* Replace with whiteout */
ret = jffs2_whiteout(old_dir_i, old_dentry);
@@ -47,7 +70,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
else
/* Unlink the original */
ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i),
-@@ -882,7 +888,7 @@ static int jffs2_rename (struct inode *o
+@@ -882,7 +901,7 @@ static int jffs2_rename (struct inode *o
return ret;
}