From 51d0476ab048c11e7ad22456e5324bf7ab3c06cd Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 25 Apr 2015 10:47:18 +0000 Subject: [PATCH] kernel: implement RENAME_EXCHANGE support for jffs2 - overlayfs requires it Signed-off-by: Felix Fietkau SVN-Revision: 45580 --- ...11-jffs2-add-RENAME_EXCHANGE-support.patch | 58 +++++++++++++++++++ ...11-jffs2-add-RENAME_EXCHANGE-support.patch | 58 +++++++++++++++++++ 2 files changed, 116 insertions(+) create mode 100644 target/linux/generic/patches-3.18/111-jffs2-add-RENAME_EXCHANGE-support.patch create mode 100644 target/linux/generic/patches-4.0/111-jffs2-add-RENAME_EXCHANGE-support.patch 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 0000000000..df208da099 --- /dev/null +++ b/target/linux/generic/patches-3.18/111-jffs2-add-RENAME_EXCHANGE-support.patch @@ -0,0 +1,58 @@ +From: Felix Fietkau +Date: Sat, 25 Apr 2015 12:41:32 +0200 +Subject: [PATCH] jffs2: add RENAME_EXCHANGE support + +Signed-off-by: Felix Fietkau +--- + +--- 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 0000000000..5e4722d9c8 --- /dev/null +++ b/target/linux/generic/patches-4.0/111-jffs2-add-RENAME_EXCHANGE-support.patch @@ -0,0 +1,58 @@ +From: Felix Fietkau +Date: Sat, 25 Apr 2015 12:41:32 +0200 +Subject: [PATCH] jffs2: add RENAME_EXCHANGE support + +Signed-off-by: Felix Fietkau +--- + +--- 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); -- 2.30.2