diff options
| -rw-r--r-- | drivers/mtd/ubi/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/mtd/ubi/Kconfig.debug | 37 | ||||
| -rw-r--r-- | drivers/mtd/ubi/build.c | 3 | ||||
| -rw-r--r-- | drivers/mtd/ubi/debug.c | 3 | ||||
| -rw-r--r-- | drivers/mtd/ubi/debug.h | 56 | ||||
| -rw-r--r-- | drivers/mtd/ubi/wl.c | 4 |
6 files changed, 49 insertions, 62 deletions
diff --git a/drivers/mtd/ubi/Kconfig b/drivers/mtd/ubi/Kconfig index 3cf193fb5e00..6abeb4f13403 100644 --- a/drivers/mtd/ubi/Kconfig +++ b/drivers/mtd/ubi/Kconfig @@ -52,6 +52,12 @@ config MTD_UBI_GLUEBI work on top of UBI. Do not enable this unless you use legacy software. -source "drivers/mtd/ubi/Kconfig.debug" +config MTD_UBI_DEBUG + bool "UBI debugging" + depends on SYSFS + select DEBUG_FS + select KALLSYMS_ALL if KALLSYMS && DEBUG_KERNEL + help + This option enables UBI debugging. endif # MTD_UBI diff --git a/drivers/mtd/ubi/Kconfig.debug b/drivers/mtd/ubi/Kconfig.debug deleted file mode 100644 index d8d33ddf567d..000000000000 --- a/drivers/mtd/ubi/Kconfig.debug +++ /dev/null @@ -1,37 +0,0 @@ -comment "UBI debugging options" - -config MTD_UBI_DEBUG - bool "UBI debugging" - depends on SYSFS - select DEBUG_FS - select KALLSYMS_ALL if KALLSYMS && DEBUG_KERNEL - help - This option enables UBI debugging. - -if MTD_UBI_DEBUG - -config MTD_UBI_DEBUG_DISABLE_BGT - bool "Do not enable the UBI background thread" - help - This option switches the background thread off by default. The thread - may be also be enabled/disabled via UBI sysfs. - -config MTD_UBI_DEBUG_EMULATE_BITFLIPS - bool "Emulate flash bit-flips" - help - This option emulates bit-flips with probability 1/50, which in turn - causes scrubbing. Useful for debugging and stressing UBI. - -config MTD_UBI_DEBUG_EMULATE_WRITE_FAILURES - bool "Emulate flash write failures" - help - This option emulates write failures with probability 1/100. Useful for - debugging and testing how UBI handlines errors. - -config MTD_UBI_DEBUG_EMULATE_ERASE_FAILURES - bool "Emulate flash erase failures" - help - This option emulates erase failures with probability 1/100. Useful for - debugging and testing how UBI handlines errors. - -endif # MTD_UBI_DEBUG diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index 3a047199a105..a801ea6b8b6d 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -986,8 +986,7 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset) * checks @ubi->thread_enabled. Otherwise we may fail to wake it up. */ spin_lock(&ubi->wl_lock); - if (!DBG_DISABLE_BGT) - ubi->thread_enabled = 1; + ubi->thread_enabled = 1; wake_up_process(ubi->bgt_thread); spin_unlock(&ubi->wl_lock); diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c index 4c7a3f67156b..d4d07e5f138f 100644 --- a/drivers/mtd/ubi/debug.c +++ b/drivers/mtd/ubi/debug.c @@ -32,12 +32,15 @@ unsigned int ubi_msg_flags; unsigned int ubi_chk_flags; +unsigned int ubi_tst_flags; module_param_named(debug_msgs, ubi_msg_flags, uint, S_IRUGO | S_IWUSR); module_param_named(debug_chks, ubi_chk_flags, uint, S_IRUGO | S_IWUSR); +module_param_named(debug_tsts, ubi_chk_flags, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug_msgs, "Debug message type flags"); MODULE_PARM_DESC(debug_chks, "Debug check flags"); +MODULE_PARM_DESC(debug_tsts, "Debug special test flags"); /** * ubi_dbg_dump_ec_hdr - dump an erase counter header. diff --git a/drivers/mtd/ubi/debug.h b/drivers/mtd/ubi/debug.h index 2511b586490a..0b0c2888c656 100644 --- a/drivers/mtd/ubi/debug.h +++ b/drivers/mtd/ubi/debug.h @@ -116,13 +116,34 @@ int ubi_dbg_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len); int ubi_dbg_check_write(struct ubi_device *ubi, const void *buf, int pnum, int offset, int len); -#ifdef CONFIG_MTD_UBI_DEBUG_DISABLE_BGT -#define DBG_DISABLE_BGT 1 -#else -#define DBG_DISABLE_BGT 0 -#endif +extern unsigned int ubi_tst_flags; + +/* + * Special testing flags. + * + * UBIFS_TST_DISABLE_BGT: disable the background thread + * UBI_TST_EMULATE_BITFLIPS: emulate bit-flips + * UBI_TST_EMULATE_WRITE_FAILURES: emulate write failures + * UBI_TST_EMULATE_ERASE_FAILURES: emulate erase failures + */ +enum { + UBI_TST_DISABLE_BGT = 0x1, + UBI_TST_EMULATE_BITFLIPS = 0x2, + UBI_TST_EMULATE_WRITE_FAILURES = 0x4, + UBI_TST_EMULATE_ERASE_FAILURES = 0x8, +}; + +/** + * ubi_dbg_is_bgt_disabled - if the background thread is disabled. + * + * Returns non-zero if the UBI background thread is disabled for testing + * purposes. + */ +static inline int ubi_dbg_is_bgt_disabled(void) +{ + return ubi_tst_flags & UBI_TST_DISABLE_BGT; +} -#ifdef CONFIG_MTD_UBI_DEBUG_EMULATE_BITFLIPS /** * ubi_dbg_is_bitflip - if it is time to emulate a bit-flip. * @@ -130,13 +151,11 @@ int ubi_dbg_check_write(struct ubi_device *ubi, const void *buf, int pnum, */ static inline int ubi_dbg_is_bitflip(void) { - return !(random32() % 200); + if (ubi_tst_flags & UBI_TST_EMULATE_BITFLIPS) + return !(random32() % 200); + return 0; } -#else -#define ubi_dbg_is_bitflip() 0 -#endif -#ifdef CONFIG_MTD_UBI_DEBUG_EMULATE_WRITE_FAILURES /** * ubi_dbg_is_write_failure - if it is time to emulate a write failure. * @@ -145,13 +164,11 @@ static inline int ubi_dbg_is_bitflip(void) */ static inline int ubi_dbg_is_write_failure(void) { - return !(random32() % 500); + if (ubi_tst_flags & UBI_TST_EMULATE_WRITE_FAILURES) + return !(random32() % 500); + return 0; } -#else -#define ubi_dbg_is_write_failure() 0 -#endif -#ifdef CONFIG_MTD_UBI_DEBUG_EMULATE_ERASE_FAILURES /** * ubi_dbg_is_erase_failure - if its time to emulate an erase failure. * @@ -160,11 +177,10 @@ static inline int ubi_dbg_is_write_failure(void) */ static inline int ubi_dbg_is_erase_failure(void) { + if (ubi_tst_flags & UBI_TST_EMULATE_ERASE_FAILURES) return !(random32() % 400); + return 0; } -#else -#define ubi_dbg_is_erase_failure() 0 -#endif #else @@ -187,7 +203,7 @@ static inline int ubi_dbg_is_erase_failure(void) #define ubi_dbg_dump_flash(ubi, pnum, offset, len) ({}) #define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a) ({}) -#define DBG_DISABLE_BGT 0 +#define ubi_dbg_is_bgt_disabled() 0 #define ubi_dbg_is_bitflip() 0 #define ubi_dbg_is_write_failure() 0 #define ubi_dbg_is_erase_failure() 0 diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c index 4e5529014c9b..b4cf57db2556 100644 --- a/drivers/mtd/ubi/wl.c +++ b/drivers/mtd/ubi/wl.c @@ -613,7 +613,7 @@ static void schedule_ubi_work(struct ubi_device *ubi, struct ubi_work *wrk) list_add_tail(&wrk->list, &ubi->works); ubi_assert(ubi->works_count >= 0); ubi->works_count += 1; - if (ubi->thread_enabled) + if (ubi->thread_enabled && !ubi_dbg_is_bgt_disabled()) wake_up_process(ubi->bgt_thread); spin_unlock(&ubi->wl_lock); } @@ -1364,7 +1364,7 @@ int ubi_thread(void *u) spin_lock(&ubi->wl_lock); if (list_empty(&ubi->works) || ubi->ro_mode || - !ubi->thread_enabled) { + !ubi->thread_enabled || ubi_dbg_is_bgt_disabled()) { set_current_state(TASK_INTERRUPTIBLE); spin_unlock(&ubi->wl_lock); schedule(); |