kernel: Copy patches from kernel 4.14 to 4.19

This just copies the files from the kernel 4.14 specific folders into
the kernel 4.19 specific folder, no changes are done to the files in
this commit.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 73 insertions, 0 deletions

diff --git a/target/linux/generic/pending-4.19/141-jffs2-add-RENAME_EXCHANGE-support.patch b/target/linux/generic/pending-4.19/141-jffs2-add-RENAME_EXCHANGE-support.patch
new file mode 100644
index 0000000000..093a73ab66
--- /dev/null
+++ b/target/linux/generic/pending-4.19/141-jffs2-add-RENAME_EXCHANGE-support.patch
@@ -0,0 +1,73 @@
+From: Felix Fietkau <nbd@nbd.name>
+Subject: jffs2: add RENAME_EXCHANGE support
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/fs/jffs2/dir.c
++++ b/fs/jffs2/dir.c
+@@ -777,18 +777,31 @@ static int jffs2_rename (struct inode *o
+ 	int ret;
+ 	struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb);
+ 	struct jffs2_inode_info *victim_f = NULL;
++	struct inode *fst_inode = d_inode(old_dentry);
++	struct inode *snd_inode = d_inode(new_dentry);
+ 	uint8_t type;
+ 	uint32_t now;
+ 
+-	if (flags & ~(RENAME_NOREPLACE|RENAME_WHITEOUT))
++	if (flags & ~(RENAME_NOREPLACE|RENAME_WHITEOUT|RENAME_EXCHANGE))
+ 		return -EINVAL;
+ 
++	if ((flags & RENAME_EXCHANGE) && (old_dir_i != new_dir_i)) {
++		if (S_ISDIR(fst_inode->i_mode) && !S_ISDIR(snd_inode->i_mode)) {
++			inc_nlink(new_dir_i);
++			drop_nlink(old_dir_i);
++		}
++		else if (!S_ISDIR(fst_inode->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
+ 	 * 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.
+ 	 */
+-	if (d_really_is_positive(new_dentry)) {
++	if (d_really_is_positive(new_dentry) && !(flags & RENAME_EXCHANGE)) {
+ 		victim_f = JFFS2_INODE_INFO(d_inode(new_dentry));
+ 		if (d_is_dir(new_dentry)) {
+ 			struct jffs2_full_dirent *fd;
+@@ -823,7 +836,7 @@ static int jffs2_rename (struct inode *o
+ 	if (ret)
+ 		return ret;
+ 
+-	if (victim_f) {
++	if (victim_f && !(flags & RENAME_EXCHANGE)) {
+ 		/* There was a victim. Kill it off nicely */
+ 		if (d_is_dir(new_dentry))
+ 			clear_nlink(d_inode(new_dentry));
+@@ -849,6 +862,12 @@ static int jffs2_rename (struct inode *o
+ 	if (flags & RENAME_WHITEOUT)
+ 		/* Replace with whiteout */
+ 		ret = jffs2_whiteout(old_dir_i, old_dentry);
++	else if (flags & RENAME_EXCHANGE)
++		/* Replace the original */
++		ret = jffs2_do_link(c, JFFS2_INODE_INFO(old_dir_i),
++				    d_inode(new_dentry)->i_ino, type,
++				    old_dentry->d_name.name, old_dentry->d_name.len,
++				    now);
+ 	else
+ 		/* Unlink the original */
+ 		ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i),
+@@ -880,7 +899,7 @@ static int jffs2_rename (struct inode *o
+ 		return ret;
+ 	}
+ 
+-	if (d_is_dir(old_dentry))
++	if (d_is_dir(old_dentry) && !(flags & RENAME_EXCHANGE))
+ 		drop_nlink(old_dir_i);
+ 
+ 	new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);