From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2992464AbXBQQzo (ORCPT ); Sat, 17 Feb 2007 11:55:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2992465AbXBQQzn (ORCPT ); Sat, 17 Feb 2007 11:55:43 -0500 Received: from smtp.nokia.com ([131.228.20.171]:54975 "EHLO mgw-ext12.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992464AbXBQQzk (ORCPT ); Sat, 17 Feb 2007 11:55:40 -0500 From: Artem Bityutskiy To: Linux Kernel Mailing List Cc: Christoph Hellwig , Artem Bityutskiy , Frank Haverkamp , Thomas Gleixner , David Woodhouse , Josh Boyer Date: Sat, 17 Feb 2007 18:55:14 +0200 Message-Id: <20070217165514.5845.31845.sendpatchset@localhost.localdomain> In-Reply-To: <20070217165424.5845.4390.sendpatchset@localhost.localdomain> References: <20070217165424.5845.4390.sendpatchset@localhost.localdomain> Subject: [PATCH 10/44 take 2] [UBI] debug unit implementation X-OriginalArrivalTime: 17 Feb 2007 16:54:42.0179 (UTC) FILETIME=[51B58530:01C752B4] X-eXpurgate-Category: 1/0 X-eXpurgate-ID: 149371::070217185305-3C652BB0-5EA84C4D/0-0/0-1 X-Nokia-AV: Clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org diff -auNrp tmp-from/drivers/mtd/ubi/debug.c tmp-to/drivers/mtd/ubi/debug.c --- tmp-from/drivers/mtd/ubi/debug.c 1970-01-01 02:00:00.000000000 +0200 +++ tmp-to/drivers/mtd/ubi/debug.c 2007-02-17 18:07:26.000000000 +0200 @@ -0,0 +1,634 @@ +/* + * Copyright (c) International Business Machines Corp., 2006 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * Author: Artem B. Bityutskiy + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ubi.h" +#include "debug.h" +#include "vtbl.h" +#include "scan.h" + +/* Level of UBI debugging prints */ +#define UBI_DBG_LEVEL KERN_DEBUG + +/* Prefixes of debugging messages */ +#define UBI_DBG_VB_ERR_PREF "[UBI DBG error]" +#define UBI_DBG_UIF_PREF "[UBI DBG uif]" +#define UBI_DBG_CDEV_PREF "[UBI DBG cdev]" +#define UBI_DBG_GLUEBI_PREF "[UBI DBG gluebi]" +#define UBI_DBG_VMT_PREF "[UBI DBG vmt]" +#define UBI_DBG_UPD_PREF "[UBI DBG upd]" +#define UBI_DBG_VTBL_PREF "[UBI DBG vtbl]" +#define UBI_DBG_ACC_PREF "[UBI DBG acc]" +#define UBI_DBG_EBA_PREF "[UBI DBG eba]" +#define UBI_DBG_WL_PREF "[UBI DBG wl]" +#define UBI_DBG_BGT_PREF "[UBI DBG bgt]" +#define UBI_DBG_ALLOC_PREF "[UBI DBG alloc]" +#define UBI_DBG_IO_PREF "[UBI DBG io]" +#define UBI_DBG_BLD_PREF "[UBI DBG bld]" +#define UBI_DBG_SCAN_PREF "[UBI DBG scan]" + +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_VB_ERR +static int vb_err_prints = 1; +#else +static int vb_err_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_UIF +static int uif_prints = 1; +#else +static int uif_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_CDEV +static int cdev_prints = 1; +#else +static int cdev_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_GLUEBI +static int gluebi_prints = 1; +#else +static int gluebi_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_VMT +static int vmt_prints = 1; +#else +static int vmt_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_UPD +static int upd_prints = 1; +#else +static int upd_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_VTBL +static int vtbl_prints = 1; +#else +static int vtbl_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_ACC +static int acc_prints = 1; +#else +static int acc_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_EBA +static int eba_prints = 1; +#else +static int eba_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_WL +static int wl_prints = 1; +#else +static int wl_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_BGT +static int bgt_prints = 1; +#else +static int bgt_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_IO +static int io_prints = 1; +#else +static int io_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_BLD +static int bld_prints = 1; +#else +static int bld_prints; +#endif +#ifdef CONFIG_MTD_UBI_DEBUG_MSG_SCAN +static int scan_prints = 1; +#else +static int scan_prints; +#endif + +/* If bit-flips should be emulated */ +#ifdef CONFIG_MTD_UBI_DEBUG_EMULATE_BITFLIPS +static int emulate_bitflips = 1; +#else +static int emulate_bitflips; +#endif + +/* If write failures should be emulated */ +#ifdef CONFIG_MTD_UBI_DEBUG_EMULATE_WRITE_FAILURES +static int emulate_write_failures = 1; +#else +static int emulate_write_failures; +#endif + +/* If erase failures should be emulated */ +#ifdef CONFIG_MTD_UBI_DEBUG_EMULATE_ERASE_FAILURES +static int emulate_erase_failures = 1; +#else +static int emulate_erase_failures; +#endif + +/* Direntries of the UBI debugfs files */ + +/* /ubi */ +static struct dentry *debugfs_root; +/* /ubi/log */ +static struct dentry *debugfs_vb_err_prints; +/* /ubi/uif_prints */ +static struct dentry *debugfs_uif_prints; +/* /ubi/cdev_prints */ +static struct dentry *debugfs_cdev_prints; +/* /ubi/gluebi_prints */ +static struct dentry *debugfs_gluebi_prints; +/* /ubi/vmt_prints */ +static struct dentry *debugfs_vmt_prints; +/* /ubi/upd_prints */ +static struct dentry *debugfs_upd_prints; +/* /ubi/vtbl_prints */ +static struct dentry *debugfs_vtbl_prints; +/* /ubi/acc_prints */ +static struct dentry *debugfs_acc_prints; +/* /ubi/eba_prints */ +static struct dentry *debugfs_eba_prints; +/* /ubi/wl_prints */ +static struct dentry *debugfs_wl_prints; +/* /ubi/bgt_prints */ +static struct dentry *debugfs_bgt_prints; +/* /ubi/io_prints */ +static struct dentry *debugfs_io_prints; +/* /ubi/bld_prints */ +static struct dentry *debugfs_bld_prints; +/* /ubi/scan_prints */ +static struct dentry *debugfs_scan_prints; + +/* Serializes prints */ +static spinlock_t dbg_prints_lock = SPIN_LOCK_UNLOCKED; + +int __init ubi_dbg_init(void) +{ + int err = -ENODEV; + + /* Create debugging files and directories */ + + debugfs_root = debugfs_create_dir("ubi", NULL); + if (!debugfs_root || IS_ERR(debugfs_root)) + goto out; + + debugfs_vb_err_prints = debugfs_create_bool("vb_err_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &vb_err_prints); + if (!debugfs_vb_err_prints || IS_ERR(debugfs_vb_err_prints)) + goto out_root; + + debugfs_uif_prints = debugfs_create_bool("uif_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &uif_prints); + if (!debugfs_uif_prints || IS_ERR(debugfs_uif_prints)) + goto out_vb_err; + + debugfs_cdev_prints = debugfs_create_bool("cdev_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &cdev_prints); + if (!debugfs_cdev_prints || IS_ERR(debugfs_cdev_prints)) + goto out_uif; + + debugfs_gluebi_prints = debugfs_create_bool("gluebi_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &gluebi_prints); + if (!debugfs_gluebi_prints || IS_ERR(debugfs_gluebi_prints)) + goto out_cdev; + + debugfs_vmt_prints = debugfs_create_bool("vmt_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &vmt_prints); + if (!debugfs_vmt_prints || IS_ERR(debugfs_vmt_prints)) + goto out_gluebi; + + debugfs_upd_prints = debugfs_create_bool("upd_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &upd_prints); + if (!debugfs_upd_prints || IS_ERR(debugfs_upd_prints)) + goto out_vmt; + + debugfs_vtbl_prints = debugfs_create_bool("vtbl_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &vtbl_prints); + if (!debugfs_vtbl_prints || IS_ERR(debugfs_vtbl_prints)) + goto out_upd; + + debugfs_acc_prints = debugfs_create_bool("acc_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &acc_prints); + if (!debugfs_acc_prints || IS_ERR(debugfs_acc_prints)) + goto out_vtbl; + + debugfs_eba_prints = debugfs_create_bool("eba_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &eba_prints); + if (!debugfs_eba_prints || IS_ERR(debugfs_eba_prints)) + goto out_acc; + + debugfs_wl_prints = debugfs_create_bool("wl_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &wl_prints); + if (!debugfs_wl_prints || IS_ERR(debugfs_wl_prints)) + goto out_eba; + + debugfs_bgt_prints = debugfs_create_bool("bgt_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &bgt_prints); + if (!debugfs_bgt_prints || IS_ERR(debugfs_bgt_prints)) + goto out_wl; + + debugfs_io_prints = debugfs_create_bool("io_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &io_prints); + if (!debugfs_io_prints || IS_ERR(debugfs_io_prints)) + goto out_bgt; + + debugfs_bld_prints = debugfs_create_bool("bld_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &bld_prints); + if (!debugfs_bld_prints || IS_ERR(debugfs_bld_prints)) + goto out_io; + + debugfs_scan_prints = debugfs_create_bool("scan_prints", + S_IFREG | S_IRUGO | S_IWUGO, debugfs_root, &scan_prints); + if (!debugfs_scan_prints || IS_ERR(debugfs_scan_prints)) + goto out_bld; + + return 0; + +out_bld: + debugfs_remove(debugfs_bld_prints); +out_io: + debugfs_remove(debugfs_io_prints); +out_bgt: + debugfs_remove(debugfs_bgt_prints); +out_wl: + debugfs_remove(debugfs_wl_prints); +out_eba: + debugfs_remove(debugfs_eba_prints); +out_acc: + debugfs_remove(debugfs_acc_prints); +out_vtbl: + debugfs_remove(debugfs_vtbl_prints); +out_upd: + debugfs_remove(debugfs_upd_prints); +out_vmt: + debugfs_remove(debugfs_vmt_prints); +out_gluebi: + debugfs_remove(debugfs_gluebi_prints); +out_cdev: + debugfs_remove(debugfs_cdev_prints); +out_uif: + debugfs_remove(debugfs_uif_prints); +out_vb_err: + debugfs_remove(debugfs_vb_err_prints); +out_root: + debugfs_remove(debugfs_root); +out: + return err; +} + +void __exit ubi_dbg_close(void) +{ + debugfs_remove(debugfs_scan_prints); + debugfs_remove(debugfs_bld_prints); + debugfs_remove(debugfs_io_prints); + debugfs_remove(debugfs_bgt_prints); + debugfs_remove(debugfs_wl_prints); + debugfs_remove(debugfs_eba_prints); + debugfs_remove(debugfs_acc_prints); + debugfs_remove(debugfs_vtbl_prints); + debugfs_remove(debugfs_upd_prints); + debugfs_remove(debugfs_vmt_prints); + debugfs_remove(debugfs_gluebi_prints); + debugfs_remove(debugfs_cdev_prints); + debugfs_remove(debugfs_uif_prints); + debugfs_remove(debugfs_vb_err_prints); + debugfs_remove(debugfs_root); +} + +static void ubi_dbg_vprint_nolock(int type, const char *func, const char *fmt, + va_list args); + +void ubi_dbg_print(int type, const char *func, const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + spin_lock(&dbg_prints_lock); + ubi_dbg_vprint_nolock(type, func, fmt, args); + spin_unlock(&dbg_prints_lock); + va_end(args); +} + +static void ubi_dbg_vprint_nolock(int type, const char *func, const char *fmt, + va_list args) +{ + const char *prefix; + + switch (type) { + case UBI_DBG_VB_ERR: + if (!vb_err_prints) + return; + prefix = UBI_DBG_VB_ERR_PREF; + break; + case UBI_DBG_UIF: + if (!uif_prints) + return; + prefix = UBI_DBG_UIF_PREF; + break; + case UBI_DBG_CDEV: + if (!cdev_prints) + return; + prefix = UBI_DBG_CDEV_PREF; + break; + case UBI_DBG_GLUEBI: + if (!gluebi_prints) + return; + prefix = UBI_DBG_GLUEBI_PREF; + break; + case UBI_DBG_VMT: + if (!vmt_prints) + return; + prefix = UBI_DBG_VMT_PREF; + break; + case UBI_DBG_UPD: + if (!upd_prints) + return; + prefix = UBI_DBG_UPD_PREF; + break; + case UBI_DBG_VTBL: + if (!vtbl_prints) + return; + prefix = UBI_DBG_VTBL_PREF; + break; + case UBI_DBG_ACC: + if (!acc_prints) + return; + prefix = UBI_DBG_ACC_PREF; + break; + case UBI_DBG_EBA: + if (!eba_prints) + return; + prefix = UBI_DBG_EBA_PREF; + break; + case UBI_DBG_WL: + if (!wl_prints) + return; + prefix = UBI_DBG_WL_PREF; + break; + case UBI_DBG_BGT: + if (!bgt_prints) + return; + prefix = UBI_DBG_BGT_PREF; + break; + case UBI_DBG_IO: + if (!io_prints) + return; + prefix = UBI_DBG_IO_PREF; + break; + case UBI_DBG_BLD: + if (!bld_prints) + return; + prefix = UBI_DBG_BLD_PREF; + break; + case UBI_DBG_SCAN: + if (!scan_prints) + return; + prefix = UBI_DBG_SCAN_PREF; + break; + default: + BUG(); + return; + } + + printk(UBI_DBG_LEVEL "%s (pid:%d) ", prefix, current->pid); + if (func) + printk("%s: ", func); + vprintk(fmt, args); + printk("\n"); +} + +void ubi_dbg_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr) +{ + spin_lock(&dbg_prints_lock); + ubi_msg("erase counter header dump:"); + ubi_msg("magic %#08x", ubi32_to_cpu(ec_hdr->magic)); + ubi_msg("version %d", (int)ec_hdr->version); + ubi_msg("ec %llu", (long long)ubi64_to_cpu(ec_hdr->ec)); + ubi_msg("vid_hdr_offset %d", ubi32_to_cpu(ec_hdr->vid_hdr_offset)); + ubi_msg("data_offset %d", ubi32_to_cpu(ec_hdr->data_offset)); + ubi_msg("hdr_crc %#08x", ubi32_to_cpu(ec_hdr->hdr_crc)); + ubi_msg("erase counter header hexdump:"); + spin_unlock(&dbg_prints_lock); + ubi_dbg_hexdump(ec_hdr, UBI_EC_HDR_SIZE); +} + +void ubi_dbg_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr) +{ + spin_lock(&dbg_prints_lock); + ubi_msg("volume identifier header dump:"); + ubi_msg("magic %08x", ubi32_to_cpu(vid_hdr->magic)); + ubi_msg("version %d", (int)vid_hdr->version); + ubi_msg("vol_type %d", (int)vid_hdr->vol_type); + ubi_msg("copy_flag %d", (int)vid_hdr->copy_flag); + ubi_msg("compat %d", (int)vid_hdr->compat); + ubi_msg("vol_id %d", ubi32_to_cpu(vid_hdr->vol_id)); + ubi_msg("lnum %d", ubi32_to_cpu(vid_hdr->lnum)); + ubi_msg("leb_ver %u", ubi32_to_cpu(vid_hdr->leb_ver)); + ubi_msg("data_size %d", ubi32_to_cpu(vid_hdr->data_size)); + ubi_msg("used_ebs %d", ubi32_to_cpu(vid_hdr->used_ebs)); + ubi_msg("data_pad %d", ubi32_to_cpu(vid_hdr->data_pad)); + ubi_msg("hdr_crc %08x", ubi32_to_cpu(vid_hdr->hdr_crc)); + ubi_msg("volume identifier header hexdump:"); + spin_unlock(&dbg_prints_lock); + ubi_dbg_hexdump(vid_hdr, UBI_VID_HDR_SIZE_CRC); +} + +void ubi_dbg_dump_vtr(const struct ubi_vtbl_vtr *vtr) +{ + spin_lock(&dbg_prints_lock); + ubi_msg("volume table record dump:"); + ubi_msg("reserved_pebs %d", vtr->reserved_pebs); + ubi_msg("alignment %d", vtr->alignment); + ubi_msg("data_pad %d", vtr->data_pad); + ubi_msg("vol_type %d", vtr->vol_type); + ubi_msg("name_len %d", vtr->name_len); + + if (vtr->name == NULL) { + ubi_msg("name NULL"); + spin_unlock(&dbg_prints_lock); + return; + } + + if (vtr->name_len <= UBI_VOL_NAME_MAX && + strnlen(vtr->name, vtr->name_len + 1) == vtr->name_len) { + ubi_msg("name %s", vtr->name); + } else { + ubi_msg("the 1st 5 characters of the name: %c%c%c%c%c", + vtr->name[0], vtr->name[1], vtr->name[2], + vtr->name[3], vtr->name[4]); + } + + ubi_msg("usable_leb_size %d", vtr->usable_leb_size); + ubi_msg("used_ebs %d", vtr->used_ebs); + ubi_msg("used_bytes %lld", (long long)vtr->used_bytes); + ubi_msg("last_eb_bytes %d", vtr->last_eb_bytes); + ubi_msg("corrupted %d", vtr->corrupted); + ubi_msg("upd_marker %d", vtr->upd_marker); + spin_unlock(&dbg_prints_lock); +} + +void ubi_dbg_dump_vol_tbl_record(const struct ubi_vol_tbl_record *r) +{ + int name_len = ubi16_to_cpu(r->name_len); + + spin_lock(&dbg_prints_lock); + ubi_msg("raw volume table record dump:"); + ubi_msg("reserved_pebs %d", ubi32_to_cpu(r->reserved_pebs)); + ubi_msg("alignment %d", ubi32_to_cpu(r->alignment)); + ubi_msg("data_pad %d", ubi32_to_cpu(r->data_pad)); + ubi_msg("vol_type %d", (int)r->vol_type); + ubi_msg("upd_marker %d", (int)r->upd_marker); + ubi_msg("name_len %d", name_len); + + if (r->name[0] == '\0') { + ubi_msg("name NULL"); + spin_unlock(&dbg_prints_lock); + return; + } + + if (name_len <= UBI_VOL_NAME_MAX && + strnlen(&r->name[0], name_len + 1) == name_len) { + ubi_msg("name %s", &r->name[0]); + } else { + ubi_msg("the 1st 5 characters of the name: %c%c%c%c%c", + r->name[0], r->name[1], r->name[2], r->name[3], + r->name[4]); + } + spin_unlock(&dbg_prints_lock); +} + +void ubi_dbg_dump_sv(const struct ubi_scan_volume *sv) +{ + spin_lock(&dbg_prints_lock); + ubi_msg("volume scanning information dump:"); + ubi_msg("vol_id %d", sv->vol_id); + ubi_msg("highest_lnum %d", sv->highest_lnum); + ubi_msg("leb_count %d", sv->leb_count); + ubi_msg("compat %d", sv->compat); + ubi_msg("vol_type %d", sv->vol_type); + ubi_msg("used_ebs %d", sv->used_ebs); + ubi_msg("last_data_size %d", sv->last_data_size); + ubi_msg("data_pad %d", sv->data_pad); + spin_unlock(&dbg_prints_lock); +} + +void ubi_dbg_dump_seb(const struct ubi_scan_leb *seb, int type) +{ + spin_lock(&dbg_prints_lock); + ubi_msg("eraseblock scanning information dump:"); + ubi_msg("ec %d", seb->ec); + ubi_msg("pnum %d", seb->pnum); + switch (type) { + case 0: + ubi_msg("lnum %d", seb->lnum); + ubi_msg("leb_ver %u", seb->leb_ver); + break; + case 1: + break; + } + spin_unlock(&dbg_prints_lock); +} + +void ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req, const char *name) +{ + spin_lock(&dbg_prints_lock); + ubi_msg("volume creation request dump:"); + ubi_msg("vol_id %d", req->vol_id); + ubi_msg("alignment %d", req->alignment); + ubi_msg("bytes %lld", (long long)req->bytes); + ubi_msg("vol_type %d", req->vol_type); + ubi_msg("name_len %d", req->name_len); + + if (name == NULL) { + ubi_msg("name NULL"); + spin_unlock(&dbg_prints_lock); + return; + } + + if (req->name_len <= UBI_VOL_NAME_MAX && + strnlen(name, req->name_len + 1) == req->name_len) { + ubi_msg("name %s", name); + } else { + ubi_msg("the 1st 5 characters of the name: %c%c%c%c%c", + name[0], name[1], name[2], name[3], name[4]); + } + spin_unlock(&dbg_prints_lock); +} + + +#define BYTES_PER_LINE 32 +void ubi_dbg_hexdump(const void *ptr, int size) +{ + int i, k = 0, rows, columns; + const uint8_t *p = ptr; + + size = ALIGN(size, 4); + rows = size/BYTES_PER_LINE + size % BYTES_PER_LINE; + for (i = 0; i < rows; i++) { + int j; + + cond_resched(); + + columns = min(size - k, BYTES_PER_LINE) / 4; + if (columns == 0) + break; + + spin_lock(&dbg_prints_lock); + printk(UBI_DBG_LEVEL "%5d: ", i * BYTES_PER_LINE); + + for (j = 0; j < columns; j++) { + int n, N; + + N = size - k > 4 ? 4 : size - k; + for (n = 0; n < N; n++) + printk("%02x", p[k++]); + printk(" "); + } + printk("\n"); + spin_unlock(&dbg_prints_lock); + } +} + +int ubi_dbg_is_bitflip(void) +{ + if (emulate_bitflips) + return !(random32() % 50); + else + return 0; +} + +int ubi_dbg_is_write_failure(void) +{ + if (emulate_write_failures) + return !(random32() % 100); + else + return 0; +} + +int ubi_dbg_is_erase_failure(void) +{ + if (emulate_erase_failures) + return !(random32() % 100); + else + return 0; +}