0x3E8
  *   ˆl–Ü4ý( ©³( 	Å€fàB¦-ÿÁƒ¹_†I|¥+ÁÀ x    /* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_KERNEL_READ_FILE_H
#define _LINUX_KERNEL_READ_FILE_H

#include <linux/file.h>
#include <linux/types.h>

/* This is a list of *what* is being read, not *how* nor *where*. */
#define __kernel_read_file_id(id) \
	id(UNKNOWN, unknown)		\
	id(FIRMWARE, firmware)		\
	id(MODULE, kernel-module)		\
	id(KEXEC_IMAGE, kexec-image)		\
	id(KEXEC_INITRAMFS, kexec-initramfs)	\
	id(POLICY, security-policy)		\
	id(X509_CERTIFICATE, x509-certificate)	\
	id(MAX_ID, )

#define __fid_enumify(ENUM, dummy) READING_ ## ENUM,
#define __fid_stringify(dummy, str) #str,

enum kernel_read_file_id {
	__kernel_read_file_id(__fid_enumify)
};

static const char * const kernel_read_file_str[] = {
	__kernel_read_file_id(__fid_stringify)
};

static inline const char *kernel_read_file_id_str(enum kernel_read_file_id id)
{
	if ((unsigned int)id >= READING_MAX_ID)
		return kernel_read_file_str[READING_UNKNOWN];

	return kernel_read_file_str[id];
}

ssize_t kernel_read_file(struct file *file, loff_t offset,
			 void **buf, size_t buf_size,
			 size_t *file_size,
			 enum kernel_read_file_id id);
ssize_t kernel_read_file_from_path(const char *path, loff_t offset,
				   void **buf, size_t buf_size,
				   size_t *file_size,
				   enum kernel_read_file_id id);
ssize_t kernel_read_file_from_path_initns(const char *path, loff_t offset,
					  void **buf, size_t buf_size,
					  size_t *file_size,
					  enum kernel_read_file_id id);
ssize_t kernel_read_file_from_fd(int fd, loff_t offset,
				 void **buf, size_t buf_size,
				 size_t *file_size,
				 enum kernel_read_file_id id);

#endif /* _LINUX_KERNEL_READ_FILE_H */
     ˆ¿ÂƒqÖœ¾ÁÀ Z    /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_LINUX_MSDOS_FS_H
#define _UAPI_LINUX_MSDOS_FS_H

#include <linux/types.h>
#include <linux/magic.h>
#include <asm/byteorder.h>

/*
 * The MS-DOS filesystem constants/structures
 */

#ifndef SECTOR_SIZE
#define SECTOR_SIZE	512		/* sector size (bytes) */
#endif
#define SECTOR_BITS	9		/* log2(SECTOR_SIZE) */
#define MSDOS_DPB	(MSDOS_DPS)	/* dir entries per block */
#define MSDOS_DPB_BITS	4		/* log2(MSDOS_DPB) */
#define MSDOS_DPS	(SECTOR_SIZE / sizeof(struct msdos_dir_entry))
#define MSDOS_DPS_BITS	4		/* log2(MSDOS_DPS) */
#define MSDOS_LONGNAME	256		/* maximum name length */
#define CF_LE_W(v)	le16_to_cpu(v)
#define CF_LE_L(v)	le32_to_cpu(v)
#define CT_LE_W(v)	cpu_to_le16(v)
#define CT_LE_L(v)	cpu_to_le32(v)

#define MSDOS_ROOT_INO	 1	/* The root inode number */
#define MSDOS_FSINFO_INO 2	/* Used for managing the FSINFO block */

#define MSDOS_DIR_BITS	5	/* log2(sizeof(struct msdos_dir_entry)) */

/* directory limit */
#define FAT_MAX_DIR_ENTRIES	(65536)
#define FAT_MAX_DIR_SIZE	(FAT_MAX_DIR_ENTRIES << MSDOS_DIR_BITS)

#define ATTR_NONE	0	/* no attribute bits */
#define ATTR_RO		1	/* read-only */
#define ATTR_HIDDEN	2	/* hidden */
#define ATTR_SYS	4	/* system */
#define ATTR_VOLUME	8	/* volume label */
#define ATTR_DIR	16	/* directory */
#define ATTR_ARCH	32	/* archived */

/* attribute bits that are copied "as is" */
#define ATTR_UNUSED	(ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
/* bits that are used by the Windows 95/Windows NT extended FAT */
#define ATTR_EXT	(ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)

#define CASE_LOWER_BASE	8	/* base is lower case */
#define CASE_LOWER_EXT	16	/* extension is lower case */

#define DELETED_FLAG	0xe5	/* marks file as deleted when in name[0] */
#define IS_FREE(n)	(!*(n) || *(n) == DELETED_FLAG)

#define FAT_LFN_LEN	255	/* maximum long name length */
#define MSDOS_NAME	11	/* maximum name length */
#define MSDOS_SLOTS	21	/* max # of slots for short and long names */
#define MSDOS_DOT	".          "	/* ".", padded to MSDOS_NAME chars */
#define MSDOS_DOTDOT	"..         "	/* "..", padded to MSDOS_NAME chars */

/* start of data cluster's entry (number of reserved clusters) */
#define FAT_START_ENT	2

/* maximum number of clusters */
#define MAX_FAT12	0xFF4
#define MAX_FAT16	0xFFF4
#defi