Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (c) International Business Machines Corp., 2006
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Author: Artem Bityutskiy (Битюцкий Артём)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include "ubi.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^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)  * ubi_dump_flash - dump a region of flash.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * @ubi: UBI device description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * @pnum: the physical eraseblock number to dump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * @offset: the starting offset within the physical eraseblock to dump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * @len: the length of the region to dump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) void ubi_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	size_t read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	void *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	loff_t addr = (loff_t)pnum * ubi->peb_size + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	buf = vmalloc(len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	err = mtd_read(ubi->mtd, addr, len, &read, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	if (err && err != -EUCLEAN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		ubi_err(ubi, "err %d while reading %d bytes from PEB %d:%d, read %zd bytes",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 			err, len, pnum, offset, read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	ubi_msg(ubi, "dumping %d bytes of data from PEB %d, offset %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		len, pnum, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	vfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  * ubi_dump_ec_hdr - dump an erase counter header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49)  * @ec_hdr: the erase counter header to dump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) void ubi_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	pr_err("Erase counter header dump:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	pr_err("\tmagic          %#08x\n", be32_to_cpu(ec_hdr->magic));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	pr_err("\tversion        %d\n", (int)ec_hdr->version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	pr_err("\tec             %llu\n", (long long)be64_to_cpu(ec_hdr->ec));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	pr_err("\tvid_hdr_offset %d\n", be32_to_cpu(ec_hdr->vid_hdr_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	pr_err("\tdata_offset    %d\n", be32_to_cpu(ec_hdr->data_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	pr_err("\timage_seq      %d\n", be32_to_cpu(ec_hdr->image_seq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	pr_err("\thdr_crc        %#08x\n", be32_to_cpu(ec_hdr->hdr_crc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	pr_err("erase counter header hexdump:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		       ec_hdr, UBI_EC_HDR_SIZE, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67)  * ubi_dump_vid_hdr - dump a volume identifier header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68)  * @vid_hdr: the volume identifier header to dump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) void ubi_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	pr_err("Volume identifier header dump:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	pr_err("\tmagic     %08x\n", be32_to_cpu(vid_hdr->magic));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	pr_err("\tversion   %d\n",  (int)vid_hdr->version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	pr_err("\tvol_type  %d\n",  (int)vid_hdr->vol_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	pr_err("\tcopy_flag %d\n",  (int)vid_hdr->copy_flag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	pr_err("\tcompat    %d\n",  (int)vid_hdr->compat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	pr_err("\tvol_id    %d\n",  be32_to_cpu(vid_hdr->vol_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	pr_err("\tlnum      %d\n",  be32_to_cpu(vid_hdr->lnum));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	pr_err("\tdata_size %d\n",  be32_to_cpu(vid_hdr->data_size));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	pr_err("\tused_ebs  %d\n",  be32_to_cpu(vid_hdr->used_ebs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	pr_err("\tdata_pad  %d\n",  be32_to_cpu(vid_hdr->data_pad));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	pr_err("\tsqnum     %llu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		(unsigned long long)be64_to_cpu(vid_hdr->sqnum));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	pr_err("\thdr_crc   %08x\n", be32_to_cpu(vid_hdr->hdr_crc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	pr_err("Volume identifier header hexdump:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		       vid_hdr, UBI_VID_HDR_SIZE, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  * ubi_dump_vol_info - dump volume information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93)  * @vol: UBI volume description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) void ubi_dump_vol_info(const struct ubi_volume *vol)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	pr_err("Volume information dump:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	pr_err("\tvol_id          %d\n", vol->vol_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	pr_err("\treserved_pebs   %d\n", vol->reserved_pebs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	pr_err("\talignment       %d\n", vol->alignment);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	pr_err("\tdata_pad        %d\n", vol->data_pad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	pr_err("\tvol_type        %d\n", vol->vol_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	pr_err("\tname_len        %d\n", vol->name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	pr_err("\tusable_leb_size %d\n", vol->usable_leb_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	pr_err("\tused_ebs        %d\n", vol->used_ebs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	pr_err("\tused_bytes      %lld\n", vol->used_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	pr_err("\tlast_eb_bytes   %d\n", vol->last_eb_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	pr_err("\tcorrupted       %d\n", vol->corrupted);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	pr_err("\tupd_marker      %d\n", vol->upd_marker);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	pr_err("\tskip_check      %d\n", vol->skip_check);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	if (vol->name_len <= UBI_VOL_NAME_MAX &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	    strnlen(vol->name, vol->name_len + 1) == vol->name_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		pr_err("\tname            %s\n", vol->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		pr_err("\t1st 5 characters of name: %c%c%c%c%c\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		       vol->name[0], vol->name[1], vol->name[2],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		       vol->name[3], vol->name[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)  * ubi_dump_vtbl_record - dump a &struct ubi_vtbl_record object.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)  * @r: the object to dump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)  * @idx: volume table index
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) void ubi_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	int name_len = be16_to_cpu(r->name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	pr_err("Volume table record %d dump:\n", idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	pr_err("\treserved_pebs   %d\n", be32_to_cpu(r->reserved_pebs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	pr_err("\talignment       %d\n", be32_to_cpu(r->alignment));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	pr_err("\tdata_pad        %d\n", be32_to_cpu(r->data_pad));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	pr_err("\tvol_type        %d\n", (int)r->vol_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	pr_err("\tupd_marker      %d\n", (int)r->upd_marker);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	pr_err("\tname_len        %d\n", name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	if (r->name[0] == '\0') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		pr_err("\tname            NULL\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if (name_len <= UBI_VOL_NAME_MAX &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	    strnlen(&r->name[0], name_len + 1) == name_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		pr_err("\tname            %s\n", &r->name[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		pr_err("\t1st 5 characters of name: %c%c%c%c%c\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 			r->name[0], r->name[1], r->name[2], r->name[3],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			r->name[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	pr_err("\tcrc             %#08x\n", be32_to_cpu(r->crc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)  * ubi_dump_av - dump a &struct ubi_ainf_volume object.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)  * @av: the object to dump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) void ubi_dump_av(const struct ubi_ainf_volume *av)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	pr_err("Volume attaching information dump:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	pr_err("\tvol_id         %d\n", av->vol_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	pr_err("\thighest_lnum   %d\n", av->highest_lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	pr_err("\tleb_count      %d\n", av->leb_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	pr_err("\tcompat         %d\n", av->compat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	pr_err("\tvol_type       %d\n", av->vol_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	pr_err("\tused_ebs       %d\n", av->used_ebs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	pr_err("\tlast_data_size %d\n", av->last_data_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	pr_err("\tdata_pad       %d\n", av->data_pad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)  * ubi_dump_aeb - dump a &struct ubi_ainf_peb object.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)  * @aeb: the object to dump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)  * @type: object type: 0 - not corrupted, 1 - corrupted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) void ubi_dump_aeb(const struct ubi_ainf_peb *aeb, int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	pr_err("eraseblock attaching information dump:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	pr_err("\tec       %d\n", aeb->ec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	pr_err("\tpnum     %d\n", aeb->pnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	if (type == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		pr_err("\tlnum     %d\n", aeb->lnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		pr_err("\tscrub    %d\n", aeb->scrub);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		pr_err("\tsqnum    %llu\n", aeb->sqnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)  * ubi_dump_mkvol_req - dump a &struct ubi_mkvol_req object.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)  * @req: the object to dump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) void ubi_dump_mkvol_req(const struct ubi_mkvol_req *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	char nm[17];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	pr_err("Volume creation request dump:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	pr_err("\tvol_id    %d\n",   req->vol_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	pr_err("\talignment %d\n",   req->alignment);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	pr_err("\tbytes     %lld\n", (long long)req->bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	pr_err("\tvol_type  %d\n",   req->vol_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	pr_err("\tname_len  %d\n",   req->name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	memcpy(nm, req->name, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	nm[16] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	pr_err("\t1st 16 characters of name: %s\n", nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)  * Root directory for UBI stuff in debugfs. Contains sub-directories which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)  * contain the stuff specific to particular UBI devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static struct dentry *dfs_rootdir;
^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)  * ubi_debugfs_init - create UBI debugfs directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)  * Create UBI debugfs directory. Returns zero in case of success and a negative
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)  * error code in case of failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) int ubi_debugfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	if (!IS_ENABLED(CONFIG_DEBUG_FS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	dfs_rootdir = debugfs_create_dir("ubi", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	if (IS_ERR_OR_NULL(dfs_rootdir)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		int err = dfs_rootdir ? PTR_ERR(dfs_rootdir) : -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		pr_err("UBI error: cannot create \"ubi\" debugfs directory, error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		       err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		return err;
^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) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  * ubi_debugfs_exit - remove UBI debugfs directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) void ubi_debugfs_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	if (IS_ENABLED(CONFIG_DEBUG_FS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		debugfs_remove(dfs_rootdir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) /* Read an UBI debugfs file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static ssize_t dfs_file_read(struct file *file, char __user *user_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 			     size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	unsigned long ubi_num = (unsigned long)file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	struct dentry *dent = file->f_path.dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	struct ubi_device *ubi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	struct ubi_debug_info *d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	char buf[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	ubi = ubi_get_device(ubi_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	if (!ubi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	d = &ubi->dbg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	if (dent == d->dfs_chk_gen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		val = d->chk_gen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	else if (dent == d->dfs_chk_io)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		val = d->chk_io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	else if (dent == d->dfs_chk_fastmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		val = d->chk_fastmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	else if (dent == d->dfs_disable_bgt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		val = d->disable_bgt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	else if (dent == d->dfs_emulate_bitflips)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		val = d->emulate_bitflips;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	else if (dent == d->dfs_emulate_io_failures)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		val = d->emulate_io_failures;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	else if (dent == d->dfs_emulate_power_cut) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		snprintf(buf, sizeof(buf), "%u\n", d->emulate_power_cut);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		count = simple_read_from_buffer(user_buf, count, ppos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 						buf, strlen(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	} else if (dent == d->dfs_power_cut_min) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		snprintf(buf, sizeof(buf), "%u\n", d->power_cut_min);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		count = simple_read_from_buffer(user_buf, count, ppos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 						buf, strlen(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	} else if (dent == d->dfs_power_cut_max) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		snprintf(buf, sizeof(buf), "%u\n", d->power_cut_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		count = simple_read_from_buffer(user_buf, count, ppos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 						buf, strlen(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		count = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	if (val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		buf[0] = '1';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		buf[0] = '0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	buf[1] = '\n';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	buf[2] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	count = simple_read_from_buffer(user_buf, count, ppos, buf, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	ubi_put_device(ubi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) /* Write an UBI debugfs file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) static ssize_t dfs_file_write(struct file *file, const char __user *user_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 			      size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	unsigned long ubi_num = (unsigned long)file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	struct dentry *dent = file->f_path.dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	struct ubi_device *ubi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	struct ubi_debug_info *d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	size_t buf_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	char buf[8] = {0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	ubi = ubi_get_device(ubi_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	if (!ubi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	d = &ubi->dbg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	buf_size = min_t(size_t, count, (sizeof(buf) - 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	if (copy_from_user(buf, user_buf, buf_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		count = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	if (dent == d->dfs_power_cut_min) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		if (kstrtouint(buf, 0, &d->power_cut_min) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 			count = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	} else if (dent == d->dfs_power_cut_max) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		if (kstrtouint(buf, 0, &d->power_cut_max) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 			count = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	} else if (dent == d->dfs_emulate_power_cut) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		if (kstrtoint(buf, 0, &val) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 			count = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 			d->emulate_power_cut = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		goto out;
^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) 	if (buf[0] == '1')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		val = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	else if (buf[0] == '0')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 		val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		count = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	if (dent == d->dfs_chk_gen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 		d->chk_gen = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	else if (dent == d->dfs_chk_io)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 		d->chk_io = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	else if (dent == d->dfs_chk_fastmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 		d->chk_fastmap = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	else if (dent == d->dfs_disable_bgt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		d->disable_bgt = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	else if (dent == d->dfs_emulate_bitflips)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 		d->emulate_bitflips = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	else if (dent == d->dfs_emulate_io_failures)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 		d->emulate_io_failures = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 		count = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	ubi_put_device(ubi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) /* File operations for all UBI debugfs files except
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)  * detailed_erase_block_info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) static const struct file_operations dfs_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	.read   = dfs_file_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	.write  = dfs_file_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	.open	= simple_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	.llseek = no_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	.owner  = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) /* As long as the position is less then that total number of erase blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)  * we still have more to print.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) static void *eraseblk_count_seq_start(struct seq_file *s, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	struct ubi_device *ubi = s->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	if (*pos < ubi->peb_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 		return pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) /* Since we are using the position as the iterator, we just need to check if we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)  * are done and increment the position.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) static void *eraseblk_count_seq_next(struct seq_file *s, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	struct ubi_device *ubi = s->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	(*pos)++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	if (*pos < ubi->peb_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 		return pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 	return NULL;
^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) static void eraseblk_count_seq_stop(struct seq_file *s, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) static int eraseblk_count_seq_show(struct seq_file *s, void *iter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 	struct ubi_device *ubi = s->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	struct ubi_wl_entry *wl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	int *block_number = iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	int erase_count = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	/* If this is the start, print a header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 	if (*block_number == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 		seq_puts(s, "physical_block_number\terase_count\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 	err = ubi_io_is_bad(ubi, *block_number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	spin_lock(&ubi->wl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	wl = ubi->lookuptbl[*block_number];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 	if (wl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 		erase_count = wl->ec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	spin_unlock(&ubi->wl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	if (erase_count < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	seq_printf(s, "%-22d\t%-11d\n", *block_number, erase_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	return 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) static const struct seq_operations eraseblk_count_seq_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	.start = eraseblk_count_seq_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 	.next = eraseblk_count_seq_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 	.stop = eraseblk_count_seq_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 	.show = eraseblk_count_seq_show
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) static int eraseblk_count_open(struct inode *inode, struct file *f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	struct seq_file *s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 	err = seq_open(f, &eraseblk_count_seq_ops);
^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) 	s = f->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 	s->private = ubi_get_device((unsigned long)inode->i_private);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 	if (!s->private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) static int eraseblk_count_release(struct inode *inode, struct file *f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 	struct seq_file *s = f->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 	struct ubi_device *ubi = s->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 	ubi_put_device(ubi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 	return seq_release(inode, f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) static const struct file_operations eraseblk_count_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 	.owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 	.open = eraseblk_count_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 	.read = seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 	.llseek = seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 	.release = eraseblk_count_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)  * ubi_debugfs_init_dev - initialize debugfs for an UBI device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)  * @ubi: UBI device description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)  * This function creates all debugfs files for UBI device @ubi. Returns zero in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)  * case of success and a negative error code in case of failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) int ubi_debugfs_init_dev(struct ubi_device *ubi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) 	unsigned long ubi_num = ubi->ubi_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 	struct ubi_debug_info *d = &ubi->dbg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 	int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 	if (!IS_ENABLED(CONFIG_DEBUG_FS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) 	n = snprintf(d->dfs_dir_name, UBI_DFS_DIR_LEN + 1, UBI_DFS_DIR_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) 		     ubi->ubi_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 	if (n == UBI_DFS_DIR_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) 		/* The array size is too small */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) 	d->dfs_dir = debugfs_create_dir(d->dfs_dir_name, dfs_rootdir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) 	d->dfs_chk_gen = debugfs_create_file("chk_gen", S_IWUSR, d->dfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) 					     (void *)ubi_num, &dfs_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) 	d->dfs_chk_io = debugfs_create_file("chk_io", S_IWUSR, d->dfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) 					    (void *)ubi_num, &dfs_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) 	d->dfs_chk_fastmap = debugfs_create_file("chk_fastmap", S_IWUSR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) 						 d->dfs_dir, (void *)ubi_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) 						 &dfs_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) 	d->dfs_disable_bgt = debugfs_create_file("tst_disable_bgt", S_IWUSR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) 						 d->dfs_dir, (void *)ubi_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) 						 &dfs_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) 	d->dfs_emulate_bitflips = debugfs_create_file("tst_emulate_bitflips",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) 						      S_IWUSR, d->dfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) 						      (void *)ubi_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) 						      &dfs_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) 	d->dfs_emulate_io_failures = debugfs_create_file("tst_emulate_io_failures",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) 							 S_IWUSR, d->dfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) 							 (void *)ubi_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) 							 &dfs_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) 	d->dfs_emulate_power_cut = debugfs_create_file("tst_emulate_power_cut",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) 						       S_IWUSR, d->dfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) 						       (void *)ubi_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) 						       &dfs_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) 	d->dfs_power_cut_min = debugfs_create_file("tst_emulate_power_cut_min",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) 						   S_IWUSR, d->dfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) 						   (void *)ubi_num, &dfs_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) 	d->dfs_power_cut_max = debugfs_create_file("tst_emulate_power_cut_max",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) 						   S_IWUSR, d->dfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) 						   (void *)ubi_num, &dfs_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) 	debugfs_create_file("detailed_erase_block_info", S_IRUSR, d->dfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) 			    (void *)ubi_num, &eraseblk_count_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)  * dbg_debug_exit_dev - free all debugfs files corresponding to device @ubi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)  * @ubi: UBI device description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) void ubi_debugfs_exit_dev(struct ubi_device *ubi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) 	if (IS_ENABLED(CONFIG_DEBUG_FS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) 		debugfs_remove_recursive(ubi->dbg.dfs_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)  * ubi_dbg_power_cut - emulate a power cut if it is time to do so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)  * @ubi: UBI device description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)  * @caller: Flags set to indicate from where the function is being called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)  * Returns non-zero if a power cut was emulated, zero if not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) int ubi_dbg_power_cut(struct ubi_device *ubi, int caller)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) 	unsigned int range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) 	if ((ubi->dbg.emulate_power_cut & caller) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) 	if (ubi->dbg.power_cut_counter == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) 		ubi->dbg.power_cut_counter = ubi->dbg.power_cut_min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) 		if (ubi->dbg.power_cut_max > ubi->dbg.power_cut_min) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) 			range = ubi->dbg.power_cut_max - ubi->dbg.power_cut_min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) 			ubi->dbg.power_cut_counter += prandom_u32() % range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) 	ubi->dbg.power_cut_counter--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) 	if (ubi->dbg.power_cut_counter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) 	ubi_msg(ubi, "XXXXXXXXXXXXXXX emulating a power cut XXXXXXXXXXXXXXXX");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) 	ubi_ro_mode(ubi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }