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| author | Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> | 2016-04-28 23:13:58 +0200 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2016-05-24 15:15:26 +0200 |
| commit | 525bab71feb152bccb65054cc2bca1537e3bd2b5 (patch) | |
| tree | 877c83716fd81179bac97376dbede1a368cb51d8 /drivers/mtd | |
| parent | Linux 4.6-rc6 (diff) | |
| download | linux-525bab71feb152bccb65054cc2bca1537e3bd2b5.tar.xz linux-525bab71feb152bccb65054cc2bca1537e3bd2b5.zip | |
UBI: Add ro-mode sysfs attribute
On serious situations, UBI may detect serious device corruption,
and switch to read-only mode to protect the data and allow debugging.
This commit exposes this ro-mode on sysfs, so it can be obtained
by userspace tools.
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/ubi/build.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index 22fd19c0c5d3..7091fca0fb44 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -149,6 +149,8 @@ static struct device_attribute dev_bgt_enabled = __ATTR(bgt_enabled, S_IRUGO, dev_attribute_show, NULL); static struct device_attribute dev_mtd_num = __ATTR(mtd_num, S_IRUGO, dev_attribute_show, NULL); +static struct device_attribute dev_ro_mode = + __ATTR(ro_mode, S_IRUGO, dev_attribute_show, NULL); /** * ubi_volume_notify - send a volume change notification. @@ -385,6 +387,8 @@ static ssize_t dev_attribute_show(struct device *dev, ret = sprintf(buf, "%d\n", ubi->thread_enabled); else if (attr == &dev_mtd_num) ret = sprintf(buf, "%d\n", ubi->mtd->index); + else if (attr == &dev_ro_mode) + ret = sprintf(buf, "%d\n", ubi->ro_mode); else ret = -EINVAL; @@ -404,6 +408,7 @@ static struct attribute *ubi_dev_attrs[] = { &dev_min_io_size.attr, &dev_bgt_enabled.attr, &dev_mtd_num.attr, + &dev_ro_mode.attr, NULL }; ATTRIBUTE_GROUPS(ubi_dev); |