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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/reiserfs/xattr_trusted.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/reiserfs/xattr_trusted.c')
-rw-r--r--fs/reiserfs/xattr_trusted.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c
new file mode 100644
index 000000000000..43762197fb0a
--- /dev/null
+++ b/fs/reiserfs/xattr_trusted.c
@@ -0,0 +1,81 @@
+#include <linux/reiserfs_fs.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/xattr.h>
+#include <linux/reiserfs_xattr.h>
+#include <asm/uaccess.h>
+
+#define XATTR_TRUSTED_PREFIX "trusted."
+
+static int
+trusted_get (struct inode *inode, const char *name, void *buffer, size_t size)
+{
+ if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
+ return -EINVAL;
+
+ if (!reiserfs_xattrs (inode->i_sb))
+ return -EOPNOTSUPP;
+
+ if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+ return -EPERM;
+
+ return reiserfs_xattr_get (inode, name, buffer, size);
+}
+
+static int
+trusted_set (struct inode *inode, const char *name, const void *buffer,
+ size_t size, int flags)
+{
+ if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
+ return -EINVAL;
+
+ if (!reiserfs_xattrs (inode->i_sb))
+ return -EOPNOTSUPP;
+
+ if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+ return -EPERM;
+
+ return reiserfs_xattr_set (inode, name, buffer, size, flags);
+}
+
+static int
+trusted_del (struct inode *inode, const char *name)
+{
+ if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
+ return -EINVAL;
+
+ if (!reiserfs_xattrs (inode->i_sb))
+ return -EOPNOTSUPP;
+
+ if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+ return -EPERM;
+
+ return 0;
+}
+
+static int
+trusted_list (struct inode *inode, const char *name, int namelen, char *out)
+{
+ int len = namelen;
+
+ if (!reiserfs_xattrs (inode->i_sb))
+ return 0;
+
+ if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+ return 0;
+
+ if (out)
+ memcpy (out, name, len);
+
+ return len;
+}
+
+
+struct reiserfs_xattr_handler trusted_handler = {
+ .prefix = XATTR_TRUSTED_PREFIX,
+ .get = trusted_get,
+ .set = trusted_set,
+ .del = trusted_del,
+ .list = trusted_list,
+};