2 * linux/fs/ext3/xattr_user.c
3 * Handler for extended user attributes.
5 * Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
8 #include <linux/module.h>
9 #include <linux/string.h>
11 #include <linux/smp_lock.h>
12 #include <linux/ext3_jbd.h>
13 #include <linux/ext3_fs.h>
16 #define XATTR_USER_PREFIX "user."
19 ext3_xattr_user_list(char *list, struct inode *inode,
20 const char *name, int name_len)
22 const int prefix_len = sizeof(XATTR_USER_PREFIX)-1;
24 if (!test_opt(inode->i_sb, XATTR_USER))
28 memcpy(list, XATTR_USER_PREFIX, prefix_len);
29 memcpy(list+prefix_len, name, name_len);
30 list[prefix_len + name_len] = '\0';
32 return prefix_len + name_len + 1;
36 ext3_xattr_user_get(struct inode *inode, const char *name,
37 void *buffer, size_t size)
41 if (strcmp(name, "") == 0)
43 if (!test_opt(inode->i_sb, XATTR_USER))
45 error = permission(inode, MAY_READ, NULL);
49 return ext3_xattr_get(inode, EXT3_XATTR_INDEX_USER, name, buffer, size);
53 ext3_xattr_user_set(struct inode *inode, const char *name,
54 const void *value, size_t size, int flags)
58 if (strcmp(name, "") == 0)
60 if (!test_opt(inode->i_sb, XATTR_USER))
62 if ( !S_ISREG(inode->i_mode) &&
63 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
65 error = permission(inode, MAY_WRITE, NULL);
69 return ext3_xattr_set(inode, EXT3_XATTR_INDEX_USER, name,
73 struct ext3_xattr_handler ext3_xattr_user_handler = {
74 .prefix = XATTR_USER_PREFIX,
75 .list = ext3_xattr_user_list,
76 .get = ext3_xattr_user_get,
77 .set = ext3_xattr_user_set,