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- From: Felix Fietkau <nbd@nbd.name>
- Date: Sat, 25 Apr 2015 12:41:32 +0200
- 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
- @@ -784,7 +784,7 @@ static int jffs2_rename (struct inode *o
- uint8_t type;
- uint32_t now;
-
- - if (flags & ~RENAME_WHITEOUT)
- + if (flags & ~(RENAME_WHITEOUT | RENAME_EXCHANGE))
- return -EINVAL;
-
- /* The VFS will check for us and prevent trying to rename a
- @@ -792,7 +792,7 @@ static int jffs2_rename (struct inode *o
- * 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;
- @@ -827,7 +827,7 @@ 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));
- @@ -853,6 +853,12 @@ 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),
- @@ -884,7 +890,7 @@ 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);
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