^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * This file is part of UBIFS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2006-2008 Nokia Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Authors: Artem Bityutskiy (Битюцкий Артём)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Adrian Hunter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) /* This file implements reading and writing the master node */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "ubifs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * ubifs_compare_master_node - compare two UBIFS master nodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * @c: UBIFS file-system description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * @m1: the first node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * @m2: the second node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * This function compares two UBIFS master nodes. Returns 0 if they are equal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * and nonzero if not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) int ubifs_compare_master_node(struct ubifs_info *c, void *m1, void *m2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int behind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int hmac_offs = offsetof(struct ubifs_mst_node, hmac);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * Do not compare the common node header since the sequence number and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * hence the CRC are different.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) ret = memcmp(m1 + UBIFS_CH_SZ, m2 + UBIFS_CH_SZ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) hmac_offs - UBIFS_CH_SZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * Do not compare the embedded HMAC aswell which also must be different
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * due to the different common node header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) behind = hmac_offs + UBIFS_MAX_HMAC_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (UBIFS_MST_NODE_SZ > behind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return memcmp(m1 + behind, m2 + behind, UBIFS_MST_NODE_SZ - behind);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* mst_node_check_hash - Check hash of a master node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * @c: UBIFS file-system description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * @mst: The master node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * @expected: The expected hash of the master node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * This checks the hash of a master node against a given expected hash.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * Note that we have two master nodes on a UBIFS image which have different
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * sequence numbers and consequently different CRCs. To be able to match
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * both master nodes we exclude the common node header containing the sequence
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * number and CRC from the hash.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * Returns 0 if the hashes are equal, a negative error code otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static int mst_node_check_hash(const struct ubifs_info *c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) const struct ubifs_mst_node *mst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) const u8 *expected)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) u8 calc[UBIFS_MAX_HASH_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) const void *node = mst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) crypto_shash_tfm_digest(c->hash_tfm, node + sizeof(struct ubifs_ch),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) UBIFS_MST_NODE_SZ - sizeof(struct ubifs_ch),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) calc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (ubifs_check_hash(c, expected, calc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * scan_for_master - search the valid master node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * @c: UBIFS file-system description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * This function scans the master node LEBs and search for the latest master
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * node. Returns zero in case of success, %-EUCLEAN if there master area is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * corrupted and requires recovery, and a negative error code in case of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static int scan_for_master(struct ubifs_info *c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct ubifs_scan_leb *sleb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct ubifs_scan_node *snod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) int lnum, offs = 0, nodes_cnt, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) lnum = UBIFS_MST_LNUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) sleb = ubifs_scan(c, lnum, 0, c->sbuf, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (IS_ERR(sleb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return PTR_ERR(sleb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) nodes_cnt = sleb->nodes_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (nodes_cnt > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) snod = list_entry(sleb->nodes.prev, struct ubifs_scan_node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (snod->type != UBIFS_MST_NODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) goto out_dump;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) memcpy(c->mst_node, snod->node, snod->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) offs = snod->offs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ubifs_scan_destroy(sleb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) lnum += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) sleb = ubifs_scan(c, lnum, 0, c->sbuf, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (IS_ERR(sleb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return PTR_ERR(sleb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (sleb->nodes_cnt != nodes_cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (!sleb->nodes_cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) snod = list_entry(sleb->nodes.prev, struct ubifs_scan_node, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (snod->type != UBIFS_MST_NODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) goto out_dump;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (snod->offs != offs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (ubifs_compare_master_node(c, c->mst_node, snod->node))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) c->mst_offs = offs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) ubifs_scan_destroy(sleb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (!ubifs_authenticated(c))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (ubifs_hmac_zero(c, c->mst_node->hmac)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) err = mst_node_check_hash(c, c->mst_node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) c->sup_node->hash_mst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ubifs_err(c, "Failed to verify master node hash");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) err = ubifs_node_verify_hmac(c, c->mst_node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) sizeof(struct ubifs_mst_node),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) offsetof(struct ubifs_mst_node, hmac));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) ubifs_err(c, "Failed to verify master node HMAC");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) ubifs_scan_destroy(sleb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return -EUCLEAN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) out_dump:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) ubifs_err(c, "unexpected node type %d master LEB %d:%d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) snod->type, lnum, snod->offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) ubifs_scan_destroy(sleb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * validate_master - validate master node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * @c: UBIFS file-system description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * This function validates data which was read from master node. Returns zero
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * if the data is all right and %-EINVAL if not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static int validate_master(const struct ubifs_info *c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) long long main_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (c->max_sqnum >= SQNUM_WATERMARK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) err = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (c->cmt_no >= c->max_sqnum) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) err = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (c->highest_inum >= INUM_WATERMARK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) err = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (c->lhead_lnum < UBIFS_LOG_LNUM ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) c->lhead_lnum >= UBIFS_LOG_LNUM + c->log_lebs ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) c->lhead_offs < 0 || c->lhead_offs >= c->leb_size ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) c->lhead_offs & (c->min_io_size - 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) err = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (c->zroot.lnum >= c->leb_cnt || c->zroot.lnum < c->main_first ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) c->zroot.offs >= c->leb_size || c->zroot.offs & 7) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) err = 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (c->zroot.len < c->ranges[UBIFS_IDX_NODE].min_len ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) c->zroot.len > c->ranges[UBIFS_IDX_NODE].max_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) err = 6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (c->gc_lnum >= c->leb_cnt || c->gc_lnum < c->main_first) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) err = 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (c->ihead_lnum >= c->leb_cnt || c->ihead_lnum < c->main_first ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) c->ihead_offs % c->min_io_size || c->ihead_offs < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) c->ihead_offs > c->leb_size || c->ihead_offs & 7) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) err = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) main_sz = (long long)c->main_lebs * c->leb_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (c->bi.old_idx_sz & 7 || c->bi.old_idx_sz >= main_sz) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) err = 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (c->lpt_lnum < c->lpt_first || c->lpt_lnum > c->lpt_last ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) c->lpt_offs < 0 || c->lpt_offs + c->nnode_sz > c->leb_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) err = 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (c->nhead_lnum < c->lpt_first || c->nhead_lnum > c->lpt_last ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) c->nhead_offs < 0 || c->nhead_offs % c->min_io_size ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) c->nhead_offs > c->leb_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) err = 11;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (c->ltab_lnum < c->lpt_first || c->ltab_lnum > c->lpt_last ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) c->ltab_offs < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) c->ltab_offs + c->ltab_sz > c->leb_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) err = 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (c->big_lpt && (c->lsave_lnum < c->lpt_first ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) c->lsave_lnum > c->lpt_last || c->lsave_offs < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) c->lsave_offs + c->lsave_sz > c->leb_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) err = 13;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) if (c->lscan_lnum < c->main_first || c->lscan_lnum >= c->leb_cnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) err = 14;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (c->lst.empty_lebs < 0 || c->lst.empty_lebs > c->main_lebs - 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) err = 15;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (c->lst.idx_lebs < 0 || c->lst.idx_lebs > c->main_lebs - 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) err = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (c->lst.total_free < 0 || c->lst.total_free > main_sz ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) c->lst.total_free & 7) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) err = 17;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (c->lst.total_dirty < 0 || (c->lst.total_dirty & 7)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) err = 18;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) if (c->lst.total_used < 0 || (c->lst.total_used & 7)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) err = 19;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (c->lst.total_free + c->lst.total_dirty +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) c->lst.total_used > main_sz) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) err = 20;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (c->lst.total_dead + c->lst.total_dark +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) c->lst.total_used + c->bi.old_idx_sz > main_sz) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) err = 21;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (c->lst.total_dead < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) c->lst.total_dead > c->lst.total_free + c->lst.total_dirty ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) c->lst.total_dead & 7) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) err = 22;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (c->lst.total_dark < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) c->lst.total_dark > c->lst.total_free + c->lst.total_dirty ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) c->lst.total_dark & 7) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) err = 23;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) ubifs_err(c, "bad master node at offset %d error %d", c->mst_offs, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) ubifs_dump_node(c, c->mst_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) * ubifs_read_master - read master node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) * @c: UBIFS file-system description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) * This function finds and reads the master node during file-system mount. If
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * the flash is empty, it creates default master node as well. Returns zero in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * case of success and a negative error code in case of failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) int ubifs_read_master(struct ubifs_info *c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) int err, old_leb_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) c->mst_node = kzalloc(c->mst_node_alsz, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (!c->mst_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) err = scan_for_master(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (err == -EUCLEAN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) err = ubifs_recover_master_node(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) * Note, we do not free 'c->mst_node' here because the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) * unmount routine will take care of this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) /* Make sure that the recovery flag is clear */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) c->mst_node->flags &= cpu_to_le32(~UBIFS_MST_RCVRY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) c->max_sqnum = le64_to_cpu(c->mst_node->ch.sqnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) c->highest_inum = le64_to_cpu(c->mst_node->highest_inum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) c->cmt_no = le64_to_cpu(c->mst_node->cmt_no);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) c->zroot.lnum = le32_to_cpu(c->mst_node->root_lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) c->zroot.offs = le32_to_cpu(c->mst_node->root_offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) c->zroot.len = le32_to_cpu(c->mst_node->root_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) c->lhead_lnum = le32_to_cpu(c->mst_node->log_lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) c->gc_lnum = le32_to_cpu(c->mst_node->gc_lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) c->ihead_lnum = le32_to_cpu(c->mst_node->ihead_lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) c->ihead_offs = le32_to_cpu(c->mst_node->ihead_offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) c->bi.old_idx_sz = le64_to_cpu(c->mst_node->index_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) c->lpt_lnum = le32_to_cpu(c->mst_node->lpt_lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) c->lpt_offs = le32_to_cpu(c->mst_node->lpt_offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) c->nhead_lnum = le32_to_cpu(c->mst_node->nhead_lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) c->nhead_offs = le32_to_cpu(c->mst_node->nhead_offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) c->ltab_lnum = le32_to_cpu(c->mst_node->ltab_lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) c->ltab_offs = le32_to_cpu(c->mst_node->ltab_offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) c->lsave_lnum = le32_to_cpu(c->mst_node->lsave_lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) c->lsave_offs = le32_to_cpu(c->mst_node->lsave_offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) c->lscan_lnum = le32_to_cpu(c->mst_node->lscan_lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) c->lst.empty_lebs = le32_to_cpu(c->mst_node->empty_lebs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) c->lst.idx_lebs = le32_to_cpu(c->mst_node->idx_lebs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) old_leb_cnt = le32_to_cpu(c->mst_node->leb_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) c->lst.total_free = le64_to_cpu(c->mst_node->total_free);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) c->lst.total_dirty = le64_to_cpu(c->mst_node->total_dirty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) c->lst.total_used = le64_to_cpu(c->mst_node->total_used);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) c->lst.total_dead = le64_to_cpu(c->mst_node->total_dead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) c->lst.total_dark = le64_to_cpu(c->mst_node->total_dark);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) ubifs_copy_hash(c, c->mst_node->hash_root_idx, c->zroot.hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) c->calc_idx_sz = c->bi.old_idx_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (c->mst_node->flags & cpu_to_le32(UBIFS_MST_NO_ORPHS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) c->no_orphs = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (old_leb_cnt != c->leb_cnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) /* The file system has been resized */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) int growth = c->leb_cnt - old_leb_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) if (c->leb_cnt < old_leb_cnt ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) c->leb_cnt < UBIFS_MIN_LEB_CNT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) ubifs_err(c, "bad leb_cnt on master node");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) ubifs_dump_node(c, c->mst_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) dbg_mnt("Auto resizing (master) from %d LEBs to %d LEBs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) old_leb_cnt, c->leb_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) c->lst.empty_lebs += growth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) c->lst.total_free += growth * (long long)c->leb_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) c->lst.total_dark += growth * (long long)c->dark_wm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * Reflect changes back onto the master node. N.B. the master
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * node gets written immediately whenever mounting (or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * remounting) in read-write mode, so we do not need to write it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) c->mst_node->leb_cnt = cpu_to_le32(c->leb_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) c->mst_node->empty_lebs = cpu_to_le32(c->lst.empty_lebs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) c->mst_node->total_free = cpu_to_le64(c->lst.total_free);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) c->mst_node->total_dark = cpu_to_le64(c->lst.total_dark);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) err = validate_master(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) err = dbg_old_index_check_init(c, &c->zroot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * ubifs_write_master - write master node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * @c: UBIFS file-system description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * This function writes the master node. Returns zero in case of success and a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * negative error code in case of failure. The master node is written twice to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * enable recovery.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) int ubifs_write_master(struct ubifs_info *c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) int err, lnum, offs, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) ubifs_assert(c, !c->ro_media && !c->ro_mount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if (c->ro_error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) return -EROFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) lnum = UBIFS_MST_LNUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) offs = c->mst_offs + c->mst_node_alsz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) len = UBIFS_MST_NODE_SZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (offs + UBIFS_MST_NODE_SZ > c->leb_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) err = ubifs_leb_unmap(c, lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) offs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) c->mst_offs = offs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) c->mst_node->highest_inum = cpu_to_le64(c->highest_inum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) ubifs_copy_hash(c, c->zroot.hash, c->mst_node->hash_root_idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) err = ubifs_write_node_hmac(c, c->mst_node, len, lnum, offs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) offsetof(struct ubifs_mst_node, hmac));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) lnum += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) if (offs == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) err = ubifs_leb_unmap(c, lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) err = ubifs_write_node_hmac(c, c->mst_node, len, lnum, offs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) offsetof(struct ubifs_mst_node, hmac));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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