fs/hfsplus/xattr_trusted.c

   1 /*
   2  * linux/fs/hfsplus/xattr_trusted.c
   3  *
   4  * Vyacheslav Dubeyko <slava@dubeyko.com>
   5  *
   6  * Handler for trusted extended attributes.
   7  */
   8
   9 #include "hfsplus_fs.h"
  10 #include "xattr.h"
  11
  12 static int hfsplus_trusted_getxattr(struct dentry *dentry, const char *name,
  13                                         void *buffer, size_t size, int type)
  14 {
  15         char xattr_name[HFSPLUS_ATTR_MAX_STRLEN + 1] = {0};
  16         size_t len = strlen(name);
  17
  18         if (!strcmp(name, ""))
  19                 return -EINVAL;
  20
  21         if (len + XATTR_TRUSTED_PREFIX_LEN > HFSPLUS_ATTR_MAX_STRLEN)
  22                 return -EOPNOTSUPP;
  23
  24         strcpy(xattr_name, XATTR_TRUSTED_PREFIX);
  25         strcpy(xattr_name + XATTR_TRUSTED_PREFIX_LEN, name);
  26
  27         return hfsplus_getxattr(dentry, xattr_name, buffer, size);
  28 }
  29
  30 static int hfsplus_trusted_setxattr(struct dentry *dentry, const char *name,
  31                 const void *buffer, size_t size, int flags, int type)
  32 {
  33         char xattr_name[HFSPLUS_ATTR_MAX_STRLEN + 1] = {0};
  34         size_t len = strlen(name);
  35
  36         if (!strcmp(name, ""))
  37                 return -EINVAL;
  38
  39         if (len + XATTR_TRUSTED_PREFIX_LEN > HFSPLUS_ATTR_MAX_STRLEN)
  40                 return -EOPNOTSUPP;
  41
  42         strcpy(xattr_name, XATTR_TRUSTED_PREFIX);
  43         strcpy(xattr_name + XATTR_TRUSTED_PREFIX_LEN, name);
  44
  45         return hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
  46 }
  47
  48 static size_t hfsplus_trusted_listxattr(struct dentry *dentry, char *list,
  49                 size_t list_size, const char *name, size_t name_len, int type)
  50 {
  51         /*
  52          * This method is not used.
  53          * It is used hfsplus_listxattr() instead of generic_listxattr().
  54          */
  55         return -EOPNOTSUPP;
  56 }
  57
  58 const struct xattr_handler hfsplus_xattr_trusted_handler = {
  59         .prefix = XATTR_TRUSTED_PREFIX,
  60         .list   = hfsplus_trusted_listxattr,
  61         .get    = hfsplus_trusted_getxattr,
  62         .set    = hfsplus_trusted_setxattr,
  63 };