xattr_user.c 1.4 KB

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  1. #include <linux/reiserfs_fs.h>
  2. #include <linux/errno.h>
  3. #include <linux/fs.h>
  4. #include <linux/pagemap.h>
  5. #include <linux/xattr.h>
  6. #include <linux/reiserfs_xattr.h>
  7. #include <asm/uaccess.h>
  8. #ifdef CONFIG_REISERFS_FS_POSIX_ACL
  9. # include <linux/reiserfs_acl.h>
  10. #endif
  11. #define XATTR_USER_PREFIX "user."
  12. static int
  13. user_get(struct inode *inode, const char *name, void *buffer, size_t size)
  14. {
  15. if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  16. return -EINVAL;
  17. if (!reiserfs_xattrs_user(inode->i_sb))
  18. return -EOPNOTSUPP;
  19. return reiserfs_xattr_get(inode, name, buffer, size);
  20. }
  21. static int
  22. user_set(struct inode *inode, const char *name, const void *buffer,
  23. size_t size, int flags)
  24. {
  25. if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  26. return -EINVAL;
  27. if (!reiserfs_xattrs_user(inode->i_sb))
  28. return -EOPNOTSUPP;
  29. return reiserfs_xattr_set(inode, name, buffer, size, flags);
  30. }
  31. static int user_del(struct inode *inode, const char *name)
  32. {
  33. if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  34. return -EINVAL;
  35. if (!reiserfs_xattrs_user(inode->i_sb))
  36. return -EOPNOTSUPP;
  37. return 0;
  38. }
  39. static int
  40. user_list(struct inode *inode, const char *name, int namelen, char *out)
  41. {
  42. int len = namelen;
  43. if (!reiserfs_xattrs_user(inode->i_sb))
  44. return 0;
  45. if (out)
  46. memcpy(out, name, len);
  47. return len;
  48. }
  49. struct reiserfs_xattr_handler user_handler = {
  50. .prefix = XATTR_USER_PREFIX,
  51. .get = user_get,
  52. .set = user_set,
  53. .del = user_del,
  54. .list = user_list,
  55. };