xattr_security.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. #define XATTR_SECURITY_PREFIX "security."
  9. static int
  10. security_get(struct inode *inode, const char *name, void *buffer, size_t size)
  11. {
  12. if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
  13. return -EINVAL;
  14. if (is_reiserfs_priv_object(inode))
  15. return -EPERM;
  16. return reiserfs_xattr_get(inode, name, buffer, size);
  17. }
  18. static int
  19. security_set(struct inode *inode, const char *name, const void *buffer,
  20. size_t size, int flags)
  21. {
  22. if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
  23. return -EINVAL;
  24. if (is_reiserfs_priv_object(inode))
  25. return -EPERM;
  26. return reiserfs_xattr_set(inode, name, buffer, size, flags);
  27. }
  28. static int security_del(struct inode *inode, const char *name)
  29. {
  30. if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
  31. return -EINVAL;
  32. if (is_reiserfs_priv_object(inode))
  33. return -EPERM;
  34. return 0;
  35. }
  36. static int
  37. security_list(struct inode *inode, const char *name, int namelen, char *out)
  38. {
  39. int len = namelen;
  40. if (is_reiserfs_priv_object(inode))
  41. return 0;
  42. if (out)
  43. memcpy(out, name, len);
  44. return len;
  45. }
  46. struct reiserfs_xattr_handler security_handler = {
  47. .prefix = XATTR_SECURITY_PREFIX,
  48. .get = security_get,
  49. .set = security_set,
  50. .del = security_del,
  51. .list = security_list,
  52. };