kernel_read_file.h 1.6 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef _LINUX_KERNEL_READ_FILE_H
  3. #define _LINUX_KERNEL_READ_FILE_H
  4. #include <linux/file.h>
  5. #include <linux/types.h>
  6. /* This is a list of *what* is being read, not *how* nor *where*. */
  7. #define __kernel_read_file_id(id) \
  8. id(UNKNOWN, unknown) \
  9. id(FIRMWARE, firmware) \
  10. id(MODULE, kernel-module) \
  11. id(KEXEC_IMAGE, kexec-image) \
  12. id(KEXEC_INITRAMFS, kexec-initramfs) \
  13. id(POLICY, security-policy) \
  14. id(X509_CERTIFICATE, x509-certificate) \
  15. id(MAX_ID, )
  16. #define __fid_enumify(ENUM, dummy) READING_ ## ENUM,
  17. #define __fid_stringify(dummy, str) #str,
  18. enum kernel_read_file_id {
  19. __kernel_read_file_id(__fid_enumify)
  20. };
  21. static const char * const kernel_read_file_str[] = {
  22. __kernel_read_file_id(__fid_stringify)
  23. };
  24. static inline const char *kernel_read_file_id_str(enum kernel_read_file_id id)
  25. {
  26. if ((unsigned int)id >= READING_MAX_ID)
  27. return kernel_read_file_str[READING_UNKNOWN];
  28. return kernel_read_file_str[id];
  29. }
  30. int kernel_read_file(struct file *file, loff_t offset,
  31. void **buf, size_t buf_size,
  32. size_t *file_size,
  33. enum kernel_read_file_id id);
  34. int kernel_read_file_from_path(const char *path, loff_t offset,
  35. void **buf, size_t buf_size,
  36. size_t *file_size,
  37. enum kernel_read_file_id id);
  38. int kernel_read_file_from_path_initns(const char *path, loff_t offset,
  39. void **buf, size_t buf_size,
  40. size_t *file_size,
  41. enum kernel_read_file_id id);
  42. int kernel_read_file_from_fd(int fd, loff_t offset,
  43. void **buf, size_t buf_size,
  44. size_t *file_size,
  45. enum kernel_read_file_id id);
  46. #endif /* _LINUX_KERNEL_READ_FILE_H */