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OpenCloudOS-Kernel
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UBI: make tests modes dynamic 

Similarly to the debugging checks and message, make the test modes
be dynamically selected via the "debug_tsts" module parameter or
via the "/sys/module/ubi/parameters/debug_tsts" sysfs file. This
is consistent with UBIFS as well.

And now, since all the Kconfig knobs became dynamic, we can remove
the Kconfig.debug file completely.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2011-03-15 10:30:40 +02:00
parent 92d124f531
commit 28237e4583
6 changed files with 49 additions and 62 deletions
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8
drivers/mtd/ubi/Kconfig
View File

@ -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

37
drivers/mtd/ubi/Kconfig.debug
View File

@ -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

3
drivers/mtd/ubi/build.c
View File

@ -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);

3
drivers/mtd/ubi/debug.c
View File

@ -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.

56
drivers/mtd/ubi/debug.h
View File

@ -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

4
drivers/mtd/ubi/wl.c
View File

@ -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();