1 /* 2 * Copyright (c) International Business Machines Corp., 2006 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 12 * the GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 * 18 * Author: Artem Bityutskiy (Битюцкий Артём) 19 */ 20 21 #ifndef __UBI_DEBUG_H__ 22 #define __UBI_DEBUG_H__ 23 24 void ubi_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len); 25 void ubi_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr); 26 void ubi_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr); 27 28 #include <linux/random.h> 29 30 #define ubi_assert(expr) do { \ 31 if (unlikely(!(expr))) { \ 32 pr_crit("UBI assert failed in %s at %u (pid %d)\n", \ 33 __func__, __LINE__, current->pid); \ 34 dump_stack(); \ 35 } \ 36 } while (0) 37 38 #define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a) \ 39 print_hex_dump(l, ps, pt, r, g, b, len, a) 40 41 #define ubi_dbg_msg(type, fmt, ...) \ 42 pr_debug("UBI DBG " type " (pid %d): " fmt "\n", current->pid, \ 43 ##__VA_ARGS__) 44 45 /* General debugging messages */ 46 #define dbg_gen(fmt, ...) ubi_dbg_msg("gen", fmt, ##__VA_ARGS__) 47 /* Messages from the eraseblock association sub-system */ 48 #define dbg_eba(fmt, ...) ubi_dbg_msg("eba", fmt, ##__VA_ARGS__) 49 /* Messages from the wear-leveling sub-system */ 50 #define dbg_wl(fmt, ...) ubi_dbg_msg("wl", fmt, ##__VA_ARGS__) 51 /* Messages from the input/output sub-system */ 52 #define dbg_io(fmt, ...) ubi_dbg_msg("io", fmt, ##__VA_ARGS__) 53 /* Initialization and build messages */ 54 #define dbg_bld(fmt, ...) ubi_dbg_msg("bld", fmt, ##__VA_ARGS__) 55 56 void ubi_dump_vol_info(const struct ubi_volume *vol); 57 void ubi_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx); 58 void ubi_dump_av(const struct ubi_ainf_volume *av); 59 void ubi_dump_aeb(const struct ubi_ainf_peb *aeb, int type); 60 void ubi_dump_mkvol_req(const struct ubi_mkvol_req *req); 61 int ubi_self_check_all_ff(struct ubi_device *ubi, int pnum, int offset, 62 int len); 63 int ubi_debugfs_init(void); 64 void ubi_debugfs_exit(void); 65 int ubi_debugfs_init_dev(struct ubi_device *ubi); 66 void ubi_debugfs_exit_dev(struct ubi_device *ubi); 67 68 /** 69 * ubi_dbg_is_bgt_disabled - if the background thread is disabled. 70 * @ubi: UBI device description object 71 * 72 * Returns non-zero if the UBI background thread is disabled for testing 73 * purposes. 74 */ 75 static inline int ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi) 76 { 77 return ubi->dbg.disable_bgt; 78 } 79 80 /** 81 * ubi_dbg_is_bitflip - if it is time to emulate a bit-flip. 82 * @ubi: UBI device description object 83 * 84 * Returns non-zero if a bit-flip should be emulated, otherwise returns zero. 85 */ 86 static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi) 87 { 88 if (ubi->dbg.emulate_bitflips) 89 return !(prandom_u32() % 200); 90 return 0; 91 } 92 93 /** 94 * ubi_dbg_is_write_failure - if it is time to emulate a write failure. 95 * @ubi: UBI device description object 96 * 97 * Returns non-zero if a write failure should be emulated, otherwise returns 98 * zero. 99 */ 100 static inline int ubi_dbg_is_write_failure(const struct ubi_device *ubi) 101 { 102 if (ubi->dbg.emulate_io_failures) 103 return !(prandom_u32() % 500); 104 return 0; 105 } 106 107 /** 108 * ubi_dbg_is_erase_failure - if its time to emulate an erase failure. 109 * @ubi: UBI device description object 110 * 111 * Returns non-zero if an erase failure should be emulated, otherwise returns 112 * zero. 113 */ 114 static inline int ubi_dbg_is_erase_failure(const struct ubi_device *ubi) 115 { 116 if (ubi->dbg.emulate_io_failures) 117 return !(prandom_u32() % 400); 118 return 0; 119 } 120 121 static inline int ubi_dbg_chk_io(const struct ubi_device *ubi) 122 { 123 return ubi->dbg.chk_io; 124 } 125 126 static inline int ubi_dbg_chk_gen(const struct ubi_device *ubi) 127 { 128 return ubi->dbg.chk_gen; 129 } 130 131 static inline int ubi_dbg_chk_fastmap(const struct ubi_device *ubi) 132 { 133 return ubi->dbg.chk_fastmap; 134 } 135 136 static inline void ubi_enable_dbg_chk_fastmap(struct ubi_device *ubi) 137 { 138 ubi->dbg.chk_fastmap = 1; 139 } 140 141 int ubi_dbg_power_cut(struct ubi_device *ubi, int caller); 142 #endif /* !__UBI_DEBUG_H__ */ 143