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UBI: Fastmap: Add new module parameter fm_debug

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If fm_debug is set fastmap debugging is enabled by default.
This is useful if one wants to debug fastmap on an UBI device
with serves the rootfs.
The the UBI attach mechanism runs long before debugfs can be mounted
and chk_fastmap set.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2014-10-08 15:14:09 +02:00
parent 560d86a1a2
commit 479c2c0cac
2 changed files with 10 additions and 0 deletions
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5
drivers/mtd/ubi/build.c
View File

@ -81,6 +81,7 @@ static struct mtd_dev_param __initdata mtd_dev_param[UBI_MAX_DEVICES];
#ifdef CONFIG_MTD_UBI_FASTMAP
/* UBI module parameter to enable fastmap automatically on non-fastmap images */
static bool fm_autoconvert;
static bool fm_debug;
#endif
/* Root UBI "class" object (corresponds to '/<sysfs>/class/ubi/') */
struct class *ubi_class;
@ -951,6 +952,8 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
ubi->fm_wl_pool.max_size = ubi->fm_pool.max_size / 2;
ubi->fm_disabled = !fm_autoconvert;
if (fm_debug)
ubi_enable_dbg_chk_fastmap(ubi);
if (!ubi->fm_disabled && (int)mtd_div_by_eb(ubi->mtd->size, ubi->mtd)
<= UBI_FM_MAX_START) {
@ -1503,6 +1506,8 @@ MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: mtd=<name|num|pa
#ifdef CONFIG_MTD_UBI_FASTMAP
module_param(fm_autoconvert, bool, 0644);
MODULE_PARM_DESC(fm_autoconvert, "Set this parameter to enable fastmap automatically on images without a fastmap.");
module_param(fm_debug, bool, 0);
MODULE_PARM_DESC(fm_debug, "Set this parameter to enable fastmap debugging by default. Warning, this will make fastmap slow!");
#endif
MODULE_VERSION(__stringify(UBI_VERSION));
MODULE_DESCRIPTION("UBI - Unsorted Block Images");

5
drivers/mtd/ubi/debug.h
View File

@ -132,4 +132,9 @@ static inline int ubi_dbg_chk_fastmap(const struct ubi_device *ubi)
{
return ubi->dbg.chk_fastmap;
}
static inline void ubi_enable_dbg_chk_fastmap(struct ubi_device *ubi)
{
ubi->dbg.chk_fastmap = 1;
}
#endif /* !__UBI_DEBUG_H__ */