diff options
| author |   david.oberhollenzer@sigma-star.at <david.oberhollenzer@sigma-star.at> | 2015-03-26 23:59:50 +0100 |
|---|---|---|
| committer |   Richard Weinberger <richard@nod.at> | 2015-04-13 21:05:17 +0200 |
| commit | 502690674281a047abd45f81e64c498bc23a8bb3 (patch) | |
| tree | 5aa08ca80d7de94bf0b3050a7f458ad0ed25d004 /drivers/mtd/ubi/ubi.h | |
| parent | UBIFS: fix output format of INUM_WATERMARK (diff) | |
| download | linux-dev-502690674281a047abd45f81e64c498bc23a8bb3.tar.xz linux-dev-502690674281a047abd45f81e64c498bc23a8bb3.zip | |
UBI: power cut emulation for testing
Emulate random power cuts by switching device to ro after a number of
writes to allow simple power cut testing with nand-sim.
Maximum and minimum number of successful writes before power cut and
what kind of writes (EC header, VID header or none) to interrupt
configurable via debugfs.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd/ubi/ubi.h')
| -rw-r--r-- | drivers/mtd/ubi/ubi.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h index 3d58c749f9f1..c998212fc680 100644 --- a/drivers/mtd/ubi/ubi.h +++ b/drivers/mtd/ubi/ubi.h @@ -151,6 +151,17 @@ enum { UBI_BAD_FASTMAP, }; +/* + * Flags for emulate_power_cut in ubi_debug_info + * + * POWER_CUT_EC_WRITE: Emulate a power cut when writing an EC header + * POWER_CUT_VID_WRITE: Emulate a power cut when writing a VID header + */ +enum { + POWER_CUT_EC_WRITE = 0x01, + POWER_CUT_VID_WRITE = 0x02, +}; + /** * struct ubi_wl_entry - wear-leveling entry. * @u.rb: link in the corresponding (free/used) RB-tree @@ -360,6 +371,10 @@ struct ubi_wl_entry; * @disable_bgt: disable the background task for testing purposes * @emulate_bitflips: emulate bit-flips for testing purposes * @emulate_io_failures: emulate write/erase failures for testing purposes + * @emulate_power_cut: emulate power cut for testing purposes + * @power_cut_counter: count down for writes left until emulated power cut + * @power_cut_min: minimum number of writes before emulating a power cut + * @power_cut_max: maximum number of writes until emulating a power cut * @dfs_dir_name: name of debugfs directory containing files of this UBI device * @dfs_dir: direntry object of the UBI device debugfs directory * @dfs_chk_gen: debugfs knob to enable UBI general extra checks @@ -368,6 +383,9 @@ struct ubi_wl_entry; * @dfs_disable_bgt: debugfs knob to disable the background task * @dfs_emulate_bitflips: debugfs knob to emulate bit-flips * @dfs_emulate_io_failures: debugfs knob to emulate write/erase failures + * @dfs_emulate_power_cut: debugfs knob to emulate power cuts + * @dfs_power_cut_min: debugfs knob for minimum writes before power cut + * @dfs_power_cut_max: debugfs knob for maximum writes until power cut */ struct ubi_debug_info { unsigned int chk_gen:1; @@ -376,6 +394,10 @@ struct ubi_debug_info { unsigned int disable_bgt:1; unsigned int emulate_bitflips:1; unsigned int emulate_io_failures:1; + unsigned int emulate_power_cut:2; + unsigned int power_cut_counter; + unsigned int power_cut_min; + unsigned int power_cut_max; char dfs_dir_name[UBI_DFS_DIR_LEN + 1]; struct dentry *dfs_dir; struct dentry *dfs_chk_gen; @@ -384,6 +406,9 @@ struct ubi_debug_info { struct dentry *dfs_disable_bgt; struct dentry *dfs_emulate_bitflips; struct dentry *dfs_emulate_io_failures; + struct dentry *dfs_emulate_power_cut; + struct dentry *dfs_power_cut_min; + struct dentry *dfs_power_cut_max; }; /** |