blob: 419c85970886041bf5b5b31947c69cec627ce2a0 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001/* SPDX-License-Identifier: GPL-2.0+ */
wdenk012771d2002-03-08 21:31:05 +00002/*
wdenk42dfe7a2004-03-14 22:25:36 +00003 * (C) Copyright 2000-2004
wdenk012771d2002-03-08 21:31:05 +00004 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
wdenk012771d2002-03-08 21:31:05 +00005 */
6#ifndef _PART_H
7#define _PART_H
Grant Likely735dd972007-02-20 09:04:34 +01008
Simon Glass1a736612016-02-29 15:25:39 -07009#include <blk.h>
wdenk6e592382004-04-18 17:39:38 +000010#include <ide.h>
Alison Chaikendb9b6202017-06-25 16:43:17 -070011#include <uuid.h>
Corneliu Doban12fc1f32020-11-09 11:49:16 +053012#include <linker_lists.h>
Alison Chaiken09a49932017-07-04 11:18:50 -070013#include <linux/list.h>
wdenk012771d2002-03-08 21:31:05 +000014
Alexander Grafd96a9802016-03-04 01:09:56 +010015struct block_drvr {
16 char *name;
Alexander Grafd96a9802016-03-04 01:09:56 +010017 int (*select_hwpart)(int dev_num, int hwpart);
18};
19
Egbert Eich0472fbf2013-04-09 21:11:56 +000020#define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \
21 ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \
22 ((x & 0xffff0000) ? 16 : 0))
23#define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1))
Egbert Eichae1768a2013-04-09 06:03:36 +000024
wdenk012771d2002-03-08 21:31:05 +000025/* Part types */
wdenk42dfe7a2004-03-14 22:25:36 +000026#define PART_TYPE_UNKNOWN 0x00
wdenk012771d2002-03-08 21:31:05 +000027#define PART_TYPE_MAC 0x01
28#define PART_TYPE_DOS 0x02
29#define PART_TYPE_ISO 0x03
wdenk42dfe7a2004-03-14 22:25:36 +000030#define PART_TYPE_AMIGA 0x04
richardretanubun07f3d782008-09-26 11:13:22 -040031#define PART_TYPE_EFI 0x05
wdenkc7de8292002-11-19 11:04:11 +000032
Petr Kulhavy87b85302016-09-09 10:27:15 +020033/* maximum number of partition entries supported by search */
34#define DOS_ENTRY_NUMBERS 8
35#define ISO_ENTRY_NUMBERS 64
36#define MAC_ENTRY_NUMBERS 64
37#define AMIGA_ENTRY_NUMBERS 8
wdenkb0fce992003-06-29 21:03:46 +000038/*
39 * Type string for U-Boot bootable partitions
40 */
41#define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */
42#define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */
43
wdenk012771d2002-03-08 21:31:05 +000044/* device types */
wdenkb0fce992003-06-29 21:03:46 +000045#define DEV_TYPE_UNKNOWN 0xff /* not connected */
46#define DEV_TYPE_HARDDISK 0x00 /* harddisk */
wdenk42dfe7a2004-03-14 22:25:36 +000047#define DEV_TYPE_TAPE 0x01 /* Tape */
48#define DEV_TYPE_CDROM 0x05 /* CD-ROM */
49#define DEV_TYPE_OPDISK 0x07 /* optical disk */
wdenk012771d2002-03-08 21:31:05 +000050
Alison Chaiken92856b42017-06-25 16:43:18 -070051#define PART_NAME_LEN 32
52#define PART_TYPE_LEN 32
Alison Chaikene6faf212017-06-25 16:43:22 -070053#define MAX_SEARCH_PARTITIONS 64
Alison Chaiken92856b42017-06-25 16:43:18 -070054
Heinrich Schuchardt25801ac2020-03-19 13:49:34 +010055#define PART_BOOTABLE ((int)BIT(0))
56#define PART_EFI_SYSTEM_PARTITION ((int)BIT(1))
57
Simon Glass05289792020-05-10 11:39:57 -060058struct disk_partition {
Frederic Leroy04735e92013-06-26 18:11:25 +020059 lbaint_t start; /* # of first block in partition */
60 lbaint_t size; /* number of blocks in partition */
wdenk012771d2002-03-08 21:31:05 +000061 ulong blksz; /* block size in bytes */
Alison Chaiken92856b42017-06-25 16:43:18 -070062 uchar name[PART_NAME_LEN]; /* partition name */
63 uchar type[PART_TYPE_LEN]; /* string type description */
Heinrich Schuchardt25801ac2020-03-19 13:49:34 +010064 /*
65 * The bootable is a bitmask with the following fields:
66 *
67 * PART_BOOTABLE the MBR bootable flag is set
68 * PART_EFI_SYSTEM_PARTITION the partition is an EFI system partition
69 */
70 int bootable;
Patrick Delaunayb331cd62017-01-27 11:00:42 +010071#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
Alison Chaikendb9b6202017-06-25 16:43:17 -070072 char uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */
Stephen Warren894bfbb2012-09-21 09:50:59 +000073#endif
Patrick Delaunay7561b252015-10-27 11:00:27 +010074#ifdef CONFIG_PARTITION_TYPE_GUID
Alison Chaikendb9b6202017-06-25 16:43:17 -070075 char type_guid[UUID_STR_LEN + 1]; /* type GUID as string, if exists */
Patrick Delaunay7561b252015-10-27 11:00:27 +010076#endif
Dalon Westergreenf0fb4fa2017-02-10 17:15:34 -080077#ifdef CONFIG_DOS_PARTITION
78 uchar sys_ind; /* partition type */
79#endif
Simon Glass05289792020-05-10 11:39:57 -060080};
wdenk012771d2002-03-08 21:31:05 +000081
Alison Chaiken09a49932017-07-04 11:18:50 -070082struct disk_part {
83 int partnum;
Simon Glass05289792020-05-10 11:39:57 -060084 struct disk_partition gpt_part_info;
Alison Chaiken09a49932017-07-04 11:18:50 -070085 struct list_head list;
86};
87
Grant Likely735dd972007-02-20 09:04:34 +010088/* Misc _get_dev functions */
Matthew McClintockdf3fc522011-05-24 05:31:19 +000089#ifdef CONFIG_PARTITIONS
Simon Glassfb1b7be2016-02-29 15:25:41 -070090/**
Simon Glassdb1d9e72016-02-29 15:25:42 -070091 * blk_get_dev() - get a pointer to a block device given its type and number
Simon Glassfb1b7be2016-02-29 15:25:41 -070092 *
93 * Each interface allocates its own devices and typically struct blk_desc is
94 * contained with the interface's data structure. There is no global
95 * numbering for block devices, so the interface name must be provided.
96 *
97 * @ifname: Interface name (e.g. "ide", "scsi")
98 * @dev: Device number (0 for first device on that interface, 1 for
99 * second, etc.
100 * @return pointer to the block device, or NULL if not available, or an
101 * error occurred.
102 */
Simon Glassdb1d9e72016-02-29 15:25:42 -0700103struct blk_desc *blk_get_dev(const char *ifname, int dev);
Simon Glassfb1b7be2016-02-29 15:25:41 -0700104
Simon Glass4101f682016-02-29 15:25:34 -0700105struct blk_desc *mg_disk_get_dev(int dev);
Simon Glass4101f682016-02-29 15:25:34 -0700106int host_get_dev_err(int dev, struct blk_desc **blk_devp);
Grant Likely735dd972007-02-20 09:04:34 +0100107
wdenk012771d2002-03-08 21:31:05 +0000108/* disk/part.c */
Simon Glass05289792020-05-10 11:39:57 -0600109int part_get_info(struct blk_desc *dev_desc, int part,
110 struct disk_partition *info);
Rob Clark4bbcc962017-09-09 13:15:55 -0400111/**
112 * part_get_info_whole_disk() - get partition info for the special case of
113 * a partition occupying the entire disk.
114 */
Simon Glass05289792020-05-10 11:39:57 -0600115int part_get_info_whole_disk(struct blk_desc *dev_desc,
116 struct disk_partition *info);
Rob Clark4bbcc962017-09-09 13:15:55 -0400117
Simon Glass3e8bd462016-02-29 15:25:48 -0700118void part_print(struct blk_desc *dev_desc);
119void part_init(struct blk_desc *dev_desc);
Simon Glass4101f682016-02-29 15:25:34 -0700120void dev_print(struct blk_desc *dev_desc);
Simon Glassebac37c2016-02-29 15:25:43 -0700121
122/**
123 * blk_get_device_by_str() - Get a block device given its interface/hw partition
124 *
125 * Each interface allocates its own devices and typically struct blk_desc is
126 * contained with the interface's data structure. There is no global
127 * numbering for block devices, so the interface name must be provided.
128 *
129 * The hardware parition is not related to the normal software partitioning
130 * of a device - each hardware partition is effectively a separately
131 * accessible block device. When a hardware parition is selected on MMC the
132 * other hardware partitions become inaccessible. The same block device is
133 * used to access all hardware partitions, but its capacity may change when a
134 * different hardware partition is selected.
135 *
136 * When a hardware partition number is given, the block device switches to
137 * that hardware partition.
138 *
139 * @ifname: Interface name (e.g. "ide", "scsi")
140 * @dev_str: Device and optional hw partition. This can either be a string
141 * containing the device number (e.g. "2") or the device number
142 * and hardware partition number (e.g. "2.4") for devices that
143 * support it (currently only MMC).
144 * @dev_desc: Returns a pointer to the block device on success
145 * @return block device number (local to the interface), or -1 on error
146 */
147int blk_get_device_by_str(const char *ifname, const char *dev_str,
148 struct blk_desc **dev_desc);
Simon Glasse35929e2016-02-29 15:25:44 -0700149
150/**
151 * blk_get_device_part_str() - Get a block device and partition
152 *
153 * This calls blk_get_device_by_str() to look up a device. It also looks up
154 * a partition and returns information about it.
155 *
156 * @dev_part_str is in the format:
157 * <dev>.<hw_part>:<part> where <dev> is the device number,
158 * <hw_part> is the optional hardware partition number and
159 * <part> is the partition number
160 *
161 * If ifname is "hostfs" then this function returns the sandbox host block
162 * device.
163 *
164 * If ifname is ubi, then this function returns 0, with @info set to a
165 * special UBI device.
166 *
167 * If @dev_part_str is NULL or empty or "-", then this function looks up
168 * the "bootdevice" environment variable and uses that string instead.
169 *
170 * If the partition string is empty then the first partition is used. If the
171 * partition string is "auto" then the first bootable partition is used.
172 *
173 * @ifname: Interface name (e.g. "ide", "scsi")
174 * @dev_part_str: Device and partition string
175 * @dev_desc: Returns a pointer to the block device on success
176 * @info: Returns partition information
177 * @allow_whole_dev: true to allow the user to select partition 0
178 * (which means the whole device), false to require a valid
179 * partition number >= 1
180 * @return partition number, or -1 on error
181 *
182 */
183int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
184 struct blk_desc **dev_desc,
Simon Glass05289792020-05-10 11:39:57 -0600185 struct disk_partition *info, int allow_whole_dev);
Petr Kulhavy87b85302016-09-09 10:27:15 +0200186
187/**
Sam Protsenko30789092017-09-22 01:51:58 +0300188 * part_get_info_by_name_type() - Search for a partition by name
189 * for only specified partition type
190 *
191 * @param dev_desc - block device descriptor
192 * @param gpt_name - the specified table entry name
193 * @param info - returns the disk partition info
194 * @param part_type - only search in partitions of this type
195 *
196 * @return - the partition number on match (starting on 1), -1 on no match,
197 * otherwise error
198 */
199int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name,
Simon Glass05289792020-05-10 11:39:57 -0600200 struct disk_partition *info, int part_type);
Sam Protsenko30789092017-09-22 01:51:58 +0300201
202/**
Petr Kulhavy87b85302016-09-09 10:27:15 +0200203 * part_get_info_by_name() - Search for a partition by name
204 * among all available registered partitions
205 *
206 * @param dev_desc - block device descriptor
207 * @param gpt_name - the specified table entry name
208 * @param info - returns the disk partition info
209 *
Alex Deymo88b63292017-04-02 01:49:50 -0700210 * @return - the partition number on match (starting on 1), -1 on no match,
211 * otherwise error
Petr Kulhavy87b85302016-09-09 10:27:15 +0200212 */
213int part_get_info_by_name(struct blk_desc *dev_desc,
Simon Glass05289792020-05-10 11:39:57 -0600214 const char *name, struct disk_partition *info);
Petr Kulhavy87b85302016-09-09 10:27:15 +0200215
Petr Kulhavyda2ee242016-09-09 10:27:17 +0200216/**
Ruslan Trofymenko6eccd1f2019-07-05 15:37:31 +0300217 * Get partition info from dev number + part name, or dev number + part number.
218 *
219 * Parse a device number and partition description (either name or number)
220 * in the form of device number plus partition name separated by a "#"
221 * (like "device_num#partition_name") or a device number plus a partition number
222 * separated by a ":". For example both "0#misc" and "0:1" can be valid
223 * partition descriptions for a given interface. If the partition is found, sets
224 * dev_desc and part_info accordingly with the information of the partition.
225 *
226 * @param[in] dev_iface Device interface
227 * @param[in] dev_part_str Input partition description, like "0#misc" or "0:1"
228 * @param[out] dev_desc Place to store the device description pointer
229 * @param[out] part_info Place to store the partition information
Sean Anderson9f7bb282021-02-05 09:38:56 -0500230 * @param[in] allow_whole_dev true to allow the user to select partition 0
231 * (which means the whole device), false to require a valid
232 * partition number >= 1
Sean Anderson71945272021-04-12 18:53:05 -0400233 * @return the partition number on success, or negative errno on error
Ruslan Trofymenko6eccd1f2019-07-05 15:37:31 +0300234 */
235int part_get_info_by_dev_and_name_or_num(const char *dev_iface,
236 const char *dev_part_str,
237 struct blk_desc **dev_desc,
Sean Anderson9f7bb282021-02-05 09:38:56 -0500238 struct disk_partition *part_info,
239 int allow_whole_dev);
Ruslan Trofymenko6eccd1f2019-07-05 15:37:31 +0300240
241/**
Petr Kulhavyda2ee242016-09-09 10:27:17 +0200242 * part_set_generic_name() - create generic partition like hda1 or sdb2
243 *
244 * Helper function for partition tables, which don't hold partition names
245 * (DOS, ISO). Generates partition name out of the device type and partition
246 * number.
247 *
248 * @dev_desc: pointer to the block device
249 * @part_num: partition number for which the name is generated
250 * @name: buffer where the name is written
251 */
252void part_set_generic_name(const struct blk_desc *dev_desc,
253 int part_num, char *name);
254
Alexander Grafd96a9802016-03-04 01:09:56 +0100255extern const struct block_drvr block_drvr[];
Matthew McClintockdf3fc522011-05-24 05:31:19 +0000256#else
Simon Glassdb1d9e72016-02-29 15:25:42 -0700257static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
Rob Herring99d2c202012-09-21 04:08:17 +0000258{ return NULL; }
Simon Glass4101f682016-02-29 15:25:34 -0700259static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
wdenk012771d2002-03-08 21:31:05 +0000260
Simon Glass3e8bd462016-02-29 15:25:48 -0700261static inline int part_get_info(struct blk_desc *dev_desc, int part,
Simon Glass05289792020-05-10 11:39:57 -0600262 struct disk_partition *info) { return -1; }
Rob Clark4bbcc962017-09-09 13:15:55 -0400263static inline int part_get_info_whole_disk(struct blk_desc *dev_desc,
Simon Glass05289792020-05-10 11:39:57 -0600264 struct disk_partition *info)
Rob Clark4bbcc962017-09-09 13:15:55 -0400265{ return -1; }
Simon Glass3e8bd462016-02-29 15:25:48 -0700266static inline void part_print(struct blk_desc *dev_desc) {}
267static inline void part_init(struct blk_desc *dev_desc) {}
Simon Glass4101f682016-02-29 15:25:34 -0700268static inline void dev_print(struct blk_desc *dev_desc) {}
Simon Glassebac37c2016-02-29 15:25:43 -0700269static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
270 struct blk_desc **dev_desc)
Stephen Warren2023e602012-09-21 09:50:56 +0000271{ return -1; }
Simon Glasse35929e2016-02-29 15:25:44 -0700272static inline int blk_get_device_part_str(const char *ifname,
Simon Glass05289792020-05-10 11:39:57 -0600273 const char *dev_part_str,
274 struct blk_desc **dev_desc,
275 struct disk_partition *info,
276 int allow_whole_dev)
Rob Herring99d2c202012-09-21 04:08:17 +0000277{ *dev_desc = NULL; return -1; }
Sean Anderson71945272021-04-12 18:53:05 -0400278static inline int
279part_get_info_by_dev_and_name_or_num(const char *dev_iface,
280 const char *dev_part_str,
281 struct blk_desc **dev_desc,
282 struct disk_partition *part_info,
283 int allow_whole_dev)
284{
285 *dev_desc = NULL;
286 return -ENOSYS;
287}
Matthew McClintockdf3fc522011-05-24 05:31:19 +0000288#endif
wdenk012771d2002-03-08 21:31:05 +0000289
Simon Glass96e5b032016-02-29 15:25:47 -0700290/*
291 * We don't support printing partition information in SPL and only support
292 * getting partition information in a few cases.
293 */
294#ifdef CONFIG_SPL_BUILD
295# define part_print_ptr(x) NULL
Tien Fong Cheef4b40922019-01-23 14:20:05 +0800296# if defined(CONFIG_SPL_FS_EXT4) || defined(CONFIG_SPL_FS_FAT) || \
Simon Glass96e5b032016-02-29 15:25:47 -0700297 defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
298# define part_get_info_ptr(x) x
299# else
300# define part_get_info_ptr(x) NULL
301# endif
302#else
303#define part_print_ptr(x) x
304#define part_get_info_ptr(x) x
wdenk012771d2002-03-08 21:31:05 +0000305#endif
306
wdenk012771d2002-03-08 21:31:05 +0000307
Simon Glass96e5b032016-02-29 15:25:47 -0700308struct part_driver {
309 const char *name;
310 int part_type;
Petr Kulhavy87b85302016-09-09 10:27:15 +0200311 const int max_entries; /* maximum number of entries to search */
wdenk012771d2002-03-08 21:31:05 +0000312
Simon Glass96e5b032016-02-29 15:25:47 -0700313 /**
314 * get_info() - Get information about a partition
315 *
316 * @dev_desc: Block device descriptor
317 * @part: Partition number (1 = first)
318 * @info: Returns partition information
319 */
320 int (*get_info)(struct blk_desc *dev_desc, int part,
Simon Glass05289792020-05-10 11:39:57 -0600321 struct disk_partition *info);
Simon Glass96e5b032016-02-29 15:25:47 -0700322
323 /**
324 * print() - Print partition information
325 *
326 * @dev_desc: Block device descriptor
327 */
328 void (*print)(struct blk_desc *dev_desc);
329
330 /**
331 * test() - Test if a device contains this partition type
332 *
333 * @dev_desc: Block device descriptor
334 * @return 0 if the block device appears to contain this partition
335 * type, -ve if not
336 */
337 int (*test)(struct blk_desc *dev_desc);
338};
339
340/* Declare a new U-Boot partition 'driver' */
341#define U_BOOT_PART_TYPE(__name) \
342 ll_entry_declare(struct part_driver, __name, part_driver)
wdenkc7de8292002-11-19 11:04:11 +0000343
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100344#include <part_efi.h>
Rob Clark0d6ab322017-09-13 18:05:24 -0400345
346#if CONFIG_IS_ENABLED(EFI_PARTITION)
richardretanubun07f3d782008-09-26 11:13:22 -0400347/* disk/part_efi.c */
Steve Rae60bf9412014-05-26 11:52:24 -0700348/**
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100349 * write_gpt_table() - Write the GUID Partition Table to disk
350 *
351 * @param dev_desc - block device descriptor
352 * @param gpt_h - pointer to GPT header representation
353 * @param gpt_e - pointer to GPT partition table entries
354 *
355 * @return - zero on success, otherwise error
356 */
Simon Glass4101f682016-02-29 15:25:34 -0700357int write_gpt_table(struct blk_desc *dev_desc,
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100358 gpt_header *gpt_h, gpt_entry *gpt_e);
359
360/**
361 * gpt_fill_pte(): Fill the GPT partition table entry
362 *
Maxime Ripard47d7ee42017-08-23 16:01:32 +0200363 * @param dev_desc - block device descriptor
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100364 * @param gpt_h - GPT header representation
365 * @param gpt_e - GPT partition table entries
366 * @param partitions - list of partitions
367 * @param parts - number of partitions
368 *
369 * @return zero on success
370 */
Maxime Ripard47d7ee42017-08-23 16:01:32 +0200371int gpt_fill_pte(struct blk_desc *dev_desc,
372 gpt_header *gpt_h, gpt_entry *gpt_e,
Simon Glass05289792020-05-10 11:39:57 -0600373 struct disk_partition *partitions, int parts);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100374
375/**
376 * gpt_fill_header(): Fill the GPT header
377 *
378 * @param dev_desc - block device descriptor
379 * @param gpt_h - GPT header representation
380 * @param str_guid - disk guid string representation
381 * @param parts_count - number of partitions
382 *
383 * @return - error on str_guid conversion error
384 */
Simon Glass4101f682016-02-29 15:25:34 -0700385int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100386 char *str_guid, int parts_count);
387
388/**
389 * gpt_restore(): Restore GPT partition table
390 *
391 * @param dev_desc - block device descriptor
392 * @param str_disk_guid - disk GUID
393 * @param partitions - list of partitions
394 * @param parts - number of partitions
395 *
396 * @return zero on success
397 */
Simon Glass4101f682016-02-29 15:25:34 -0700398int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
Simon Glass05289792020-05-10 11:39:57 -0600399 struct disk_partition *partitions, const int parts_count);
Steve Rae0ff7e582014-12-12 15:51:54 -0800400
401/**
402 * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
403 *
404 * @param dev_desc - block device descriptor
405 * @param buf - buffer which contains the MBR and Primary GPT info
406 *
407 * @return - '0' on success, otherwise error
408 */
Simon Glass4101f682016-02-29 15:25:34 -0700409int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
Steve Rae0ff7e582014-12-12 15:51:54 -0800410
411/**
412 * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
413 *
414 * @param dev_desc - block device descriptor
415 * @param buf - buffer which contains the MBR and Primary GPT info
416 *
417 * @return - '0' on success, otherwise error
418 */
Simon Glass4101f682016-02-29 15:25:34 -0700419int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100420
421/**
422 * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
423 * and partition table entries (PTE)
424 *
425 * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
426 *
427 * @param dev_desc - block device descriptor
428 * @param gpt_head - pointer to GPT header data read from medium
429 * @param gpt_pte - pointer to GPT partition table enties read from medium
430 *
431 * @return - '0' on success, otherwise error
432 */
Simon Glass4101f682016-02-29 15:25:34 -0700433int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100434 gpt_entry **gpt_pte);
435
436/**
437 * gpt_verify_partitions() - Function to check if partitions' name, start and
438 * size correspond to '$partitions' env variable
439 *
440 * This function checks if on medium stored GPT data is in sync with information
441 * provided in '$partitions' environment variable. Specificially, name, start
442 * and size of the partition is checked.
443 *
444 * @param dev_desc - block device descriptor
445 * @param partitions - partition data read from '$partitions' env variable
446 * @param parts - number of partitions read from '$partitions' env variable
447 * @param gpt_head - pointer to GPT header data read from medium
448 * @param gpt_pte - pointer to GPT partition table enties read from medium
449 *
450 * @return - '0' on success, otherwise error
451 */
Simon Glass4101f682016-02-29 15:25:34 -0700452int gpt_verify_partitions(struct blk_desc *dev_desc,
Simon Glass05289792020-05-10 11:39:57 -0600453 struct disk_partition *partitions, int parts,
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100454 gpt_header *gpt_head, gpt_entry **gpt_pte);
Alison Chaiken73d6d182017-06-25 16:43:23 -0700455
456
457/**
458 * get_disk_guid() - Function to read the GUID string from a device's GPT
459 *
460 * This function reads the GUID string from a block device whose descriptor
461 * is provided.
462 *
463 * @param dev_desc - block device descriptor
464 * @param guid - pre-allocated string in which to return the GUID
465 *
466 * @return - '0' on success, otherwise error
467 */
468int get_disk_guid(struct blk_desc *dev_desc, char *guid);
469
richardretanubun07f3d782008-09-26 11:13:22 -0400470#endif
471
Patrick Delaunayb0cf7332017-01-27 11:00:37 +0100472#if CONFIG_IS_ENABLED(DOS_PARTITION)
Petr Kulhavyb6dd69a2016-09-09 10:27:16 +0200473/**
474 * is_valid_dos_buf() - Ensure that a DOS MBR image is valid
475 *
476 * @param buf - buffer which contains the MBR
477 *
478 * @return - '0' on success, otherwise error
479 */
480int is_valid_dos_buf(void *buf);
481
482/**
Marek Szyprowski92f1c892020-12-23 13:55:10 +0100483 * write_mbr_sector() - write DOS MBR
Petr Kulhavyb6dd69a2016-09-09 10:27:16 +0200484 *
485 * @param dev_desc - block device descriptor
486 * @param buf - buffer which contains the MBR
487 *
488 * @return - '0' on success, otherwise error
489 */
Marek Szyprowski92f1c892020-12-23 13:55:10 +0100490int write_mbr_sector(struct blk_desc *dev_desc, void *buf);
Petr Kulhavyb6dd69a2016-09-09 10:27:16 +0200491
Marek Szyprowski20bd5ac2020-12-23 13:55:14 +0100492int write_mbr_partitions(struct blk_desc *dev,
493 struct disk_partition *p, int count, unsigned int disksig);
494int layout_mbr_partitions(struct disk_partition *p, int count,
495 lbaint_t total_sectors);
496
Petr Kulhavyb6dd69a2016-09-09 10:27:16 +0200497#endif
498
Corneliu Doban12fc1f32020-11-09 11:49:16 +0530499#ifdef CONFIG_PARTITIONS
500/**
501 * part_driver_get_count() - get partition driver count
502 *
503 * @return - number of partition drivers
504 */
505static inline int part_driver_get_count(void)
506{
507 return ll_entry_count(struct part_driver, part_driver);
508}
509
510/**
511 * part_driver_get_first() - get first partition driver
512 *
513 * @return - pointer to first partition driver on success, otherwise NULL
514 */
515static inline struct part_driver *part_driver_get_first(void)
516{
517 return ll_entry_start(struct part_driver, part_driver);
518}
519
520#else
521static inline int part_driver_get_count(void)
522{ return 0; }
523
524static inline struct part_driver *part_driver_get_first(void)
525{ return NULL; }
526#endif /* CONFIG_PARTITIONS */
Petr Kulhavyb6dd69a2016-09-09 10:27:16 +0200527
wdenk012771d2002-03-08 21:31:05 +0000528#endif /* _PART_H */