| 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__ */ |