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authorFelix Fietkau <nbd@openwrt.org>2015-04-25 10:47:18 +0000
committerFelix Fietkau <nbd@openwrt.org>2015-04-25 10:47:18 +0000
commit51d0476ab048c11e7ad22456e5324bf7ab3c06cd (patch)
tree851abe0220c453b6d792b96bec6a1bb896279d00
parent63bb07b28c07ef42bc6a2c8c225f24e3e49b6bd7 (diff)
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kernel: implement RENAME_EXCHANGE support for jffs2 - overlayfs requires it
Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 45580
-rw-r--r--target/linux/generic/patches-3.18/111-jffs2-add-RENAME_EXCHANGE-support.patch58
-rw-r--r--target/linux/generic/patches-4.0/111-jffs2-add-RENAME_EXCHANGE-support.patch58
2 files changed, 116 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/111-jffs2-add-RENAME_EXCHANGE-support.patch b/target/linux/generic/patches-3.18/111-jffs2-add-RENAME_EXCHANGE-support.patch
new file mode 100644
index 0000000..df208da
--- /dev/null
+++ b/target/linux/generic/patches-3.18/111-jffs2-add-RENAME_EXCHANGE-support.patch
@@ -0,0 +1,58 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Sat, 25 Apr 2015 12:41:32 +0200
+Subject: [PATCH] jffs2: add RENAME_EXCHANGE support
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- 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 (new_dentry->d_inode) {
++ if (new_dentry->d_inode && !(flags & RENAME_EXCHANGE)) {
+ victim_f = JFFS2_INODE_INFO(new_dentry->d_inode);
+ if (S_ISDIR(new_dentry->d_inode->i_mode)) {
+ 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 (S_ISDIR(new_dentry->d_inode->i_mode))
+ clear_nlink(new_dentry->d_inode);
+@@ -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),
++ new_dentry->d_inode->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),
+@@ -879,7 +885,7 @@ static int jffs2_rename (struct inode *o
+ return ret;
+ }
+
+- if (S_ISDIR(old_dentry->d_inode->i_mode))
++ if (S_ISDIR(old_dentry->d_inode->i_mode) && !(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);
diff --git a/target/linux/generic/patches-4.0/111-jffs2-add-RENAME_EXCHANGE-support.patch b/target/linux/generic/patches-4.0/111-jffs2-add-RENAME_EXCHANGE-support.patch
new file mode 100644
index 0000000..5e4722d
--- /dev/null
+++ b/target/linux/generic/patches-4.0/111-jffs2-add-RENAME_EXCHANGE-support.patch
@@ -0,0 +1,58 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Sat, 25 Apr 2015 12:41:32 +0200
+Subject: [PATCH] jffs2: add RENAME_EXCHANGE support
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- 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 (new_dentry->d_inode) {
++ if (new_dentry->d_inode && !(flags & RENAME_EXCHANGE)) {
+ victim_f = JFFS2_INODE_INFO(new_dentry->d_inode);
+ 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(new_dentry->d_inode);
+@@ -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),
++ new_dentry->d_inode->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),
+@@ -879,7 +885,7 @@ 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);