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authorDave Kleikamp <shaggy@austin.ibm.com>2006-10-11 12:20:50 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-11 22:14:15 +0400
commitac27a0ec112a089f1a5102bc8dffc79c8c815571 (patch)
treebcbcc0a5a88bf99b35119d9d9d660a37c503d787 /fs/ext4/xattr_security.c
parent502717f4e112b18d9c37753a32f675bec9f2838b (diff)
downloadlinux-ac27a0ec112a089f1a5102bc8dffc79c8c815571.tar.xz
[PATCH] ext4: initial copy of files from ext3
Start of the ext4 patch series. See Documentation/filesystems/ext4.txt for details. This is a simple copy of the files in fs/ext3 to fs/ext4 and /usr/incude/linux/ext3* to /usr/include/ex4* Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/ext4/xattr_security.c')
-rw-r--r--fs/ext4/xattr_security.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/fs/ext4/xattr_security.c b/fs/ext4/xattr_security.c
new file mode 100644
index 000000000000..b9c40c15647b
--- /dev/null
+++ b/fs/ext4/xattr_security.c
@@ -0,0 +1,77 @@
+/*
+ * linux/fs/ext3/xattr_security.c
+ * Handler for storing security labels as extended attributes.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/smp_lock.h>
+#include <linux/ext3_jbd.h>
+#include <linux/ext3_fs.h>
+#include <linux/security.h>
+#include "xattr.h"
+
+static size_t
+ext3_xattr_security_list(struct inode *inode, char *list, size_t list_size,
+ const char *name, size_t name_len)
+{
+ const size_t prefix_len = sizeof(XATTR_SECURITY_PREFIX)-1;
+ const size_t total_len = prefix_len + name_len + 1;
+
+
+ if (list && total_len <= list_size) {
+ memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
+ memcpy(list+prefix_len, name, name_len);
+ list[prefix_len + name_len] = '\0';
+ }
+ return total_len;
+}
+
+static int
+ext3_xattr_security_get(struct inode *inode, const char *name,
+ void *buffer, size_t size)
+{
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+ return ext3_xattr_get(inode, EXT3_XATTR_INDEX_SECURITY, name,
+ buffer, size);
+}
+
+static int
+ext3_xattr_security_set(struct inode *inode, const char *name,
+ const void *value, size_t size, int flags)
+{
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+ return ext3_xattr_set(inode, EXT3_XATTR_INDEX_SECURITY, name,
+ value, size, flags);
+}
+
+int
+ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir)
+{
+ int err;
+ size_t len;
+ void *value;
+ char *name;
+
+ err = security_inode_init_security(inode, dir, &name, &value, &len);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+ err = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_SECURITY,
+ name, value, len, 0);
+ kfree(name);
+ kfree(value);
+ return err;
+}
+
+struct xattr_handler ext3_xattr_security_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .list = ext3_xattr_security_list,
+ .get = ext3_xattr_security_get,
+ .set = ext3_xattr_security_set,
+};