Trash-Bin Functionality for the ext4 filesystem:
Signed-off-by: Harry Papaxenopoulos <[EMAIL PROTECTED]>
Signed-off-by: Nikolai Joukov <[EMAIL PROTECTED]>
Signed-off-by: Erez Zadok <[EMAIL PROTECTED]>
Index: sdfs/src/linux-2.6.20-rc6-trashbin/fs/ext4/super.c
===================================================================
--- sdfs.orig/src/linux-2.6.20-rc6-trashbin/fs/ext4/super.c
+++ sdfs/src/linux-2.6.20-rc6-trashbin/fs/ext4/super.c
@@ -35,6 +35,7 @@
#include <linux/namei.h>
#include <linux/quotaops.h>
#include <linux/seq_file.h>
+#include <linux/trashbin.h>
#include <asm/uaccess.h>
@@ -1846,6 +1847,11 @@ static int ext4_fill_super (struct super
goto failed_mount4;
}
+#ifdef CONFIG_EXT4DEV_FS_TRASHBIN
+ if ((sb->s_flags & MNT_TRASHBIN) && vfs_create_trash_bin(sb))
+ goto failed_mount4;
+#endif
+
ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY);
/*
* akpm: core read_super() calls in here with the superblock locked.
Index: sdfs/src/linux-2.6.20-rc6-trashbin/fs/ext4/namei.c
===================================================================
--- sdfs.orig/src/linux-2.6.20-rc6-trashbin/fs/ext4/namei.c
+++ sdfs/src/linux-2.6.20-rc6-trashbin/fs/ext4/namei.c
@@ -37,6 +37,8 @@
#include <linux/buffer_head.h>
#include <linux/bio.h>
#include <linux/smp_lock.h>
+#include <linux/mount.h>
+#include <linux/trashbin.h>
#include "namei.h"
#include "xattr.h"
@@ -2077,6 +2079,10 @@ static int ext4_unlink(struct inode * di
struct buffer_head * bh;
struct ext4_dir_entry_2 * de;
handle_t *handle;
+ int trashed = 0;
+#ifdef CONFIG_EXT4DEV_FS_TRASHBIN
+ struct dentry *user_dentry = NULL;
+#endif
/* Initialize quotas before so that eventual writes go
* in separate transaction */
@@ -2105,13 +2111,41 @@ static int ext4_unlink(struct inode * di
inode->i_ino, inode->i_nlink);
inode->i_nlink = 1;
}
- retval = ext4_delete_entry(handle, dir, de, bh);
+#ifdef CONFIG_EXT4DEV_FS_TRASHBIN
+ if ((dentry->d_inode->i_sb->s_flags & MNT_TRASHBIN) &&
+ (EXT4_I(dentry->d_inode)->i_flags &
+ (EXT4_UNRM_FL | EXT4_SECRM_FL))) {
+
+ /*
+ * We put this code here to optimize the common case. Since
+ * lookups are expensive, we try to reserve from making any,
+ * unless one of the trash-bin flags are set. The cleanest
+ * way though is to probably move this code outside the
+ * above if statement.
+ */
+ user_dentry = vfs_get_user_dentry(dir, 1);
+ if (IS_ERR(user_dentry)) {
+ retval = PTR_ERR(user_dentry);
+ user_dentry = NULL;
+ goto end_unlink;
+ }
+
+ if (inode->i_nlink == 1 && user_dentry->d_inode &&
+ user_dentry->d_inode->i_ino != dir->i_ino) {
+ retval = vfs_trash_entry(dir, dentry);
+ trashed = 1;
+ }
+ }
+#endif
+ if (!trashed)
+ retval = ext4_delete_entry(handle, dir, de, bh);
if (retval)
goto end_unlink;
dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
ext4_update_dx_flag(dir);
ext4_mark_inode_dirty(handle, dir);
- drop_nlink(inode);
+ if (!trashed)
+ drop_nlink(inode);
if (!inode->i_nlink)
ext4_orphan_add(handle, inode);
inode->i_ctime = dir->i_ctime;
@@ -2121,6 +2155,10 @@ static int ext4_unlink(struct inode * di
end_unlink:
ext4_journal_stop(handle);
brelse (bh);
+#ifdef CONFIG_EXT4DEV_FS_TRASHBIN
+ if (user_dentry)
+ dput(user_dentry);
+#endif
return retval;
}
Index: sdfs/src/linux-2.6.20-rc6-trashbin/fs/Kconfig
===================================================================
--- sdfs.orig/src/linux-2.6.20-rc6-trashbin/fs/Kconfig
+++ sdfs/src/linux-2.6.20-rc6-trashbin/fs/Kconfig
@@ -227,6 +227,15 @@ config EXT4DEV_FS_SECURITY
If you are not using a security module that requires using
extended attributes for file security labels, say N.
+config EXT4DEV_FS_TRASHBIN
+ bool "Ext4 trashbin functionality"
+ depends on TRASHBIN
+ depends on EXT4DEV_FS
+ help
+ Trashbin functionality for the ext4 filesystem
+
+ If unsure, say N.
+
config JBD
tristate
help
-
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