fs/hfsplus/xattr_user.c

   1 /*
   2  * linux/fs/hfsplus/xattr_user.c
   3  *
   4  * Vyacheslav Dubeyko <slava@dubeyko.com>
   5  *
   6  * Handler for user extended attributes.
   7  */
   8
   9 #include <linux/nls.h>
  10
  11 #include "hfsplus_fs.h"
  12 #include "xattr.h"
  13
  14 static int hfsplus_user_getxattr(struct dentry *dentry, const char *name,
  15                                         void *buffer, size_t size, int type)
  16 {
  17         char *xattr_name;
  18         int res;
  19
  20         if (!strcmp(name, ""))
  21                 return -EINVAL;
  22
  23         xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
  24                 GFP_KERNEL);
  25         if (!xattr_name)
  26                 return -ENOMEM;
  27         strcpy(xattr_name, XATTR_USER_PREFIX);
  28         strcpy(xattr_name + XATTR_USER_PREFIX_LEN, name);
  29
  30         res = hfsplus_getxattr(dentry, xattr_name, buffer, size);
  31         kfree(xattr_name);
  32         return res;
  33 }
  34
  35 static int hfsplus_user_setxattr(struct dentry *dentry, const char *name,
  36                 const void *buffer, size_t size, int flags, int type)
  37 {
  38         char *xattr_name;
  39         int res;
  40
  41         if (!strcmp(name, ""))
  42                 return -EINVAL;
  43
  44         xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
  45                 GFP_KERNEL);
  46         if (!xattr_name)
  47                 return -ENOMEM;
  48         strcpy(xattr_name, XATTR_USER_PREFIX);
  49         strcpy(xattr_name + XATTR_USER_PREFIX_LEN, name);
  50
  51         res = hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
  52         kfree(xattr_name);
  53         return res;
  54 }
  55
  56 static size_t hfsplus_user_listxattr(struct dentry *dentry, char *list,
  57                 size_t list_size, const char *name, size_t name_len, int type)
  58 {
  59         /*
  60          * This method is not used.
  61          * It is used hfsplus_listxattr() instead of generic_listxattr().
  62          */
  63         return -EOPNOTSUPP;
  64 }
  65
  66 const struct xattr_handler hfsplus_xattr_user_handler = {
  67         .prefix = XATTR_USER_PREFIX,
  68         .list   = hfsplus_user_listxattr,
  69         .get    = hfsplus_user_getxattr,
  70         .set    = hfsplus_user_setxattr,
  71 };