diff options
| author |   WeiXiong Liao <liaoweixiong@allwinnertech.com> | 2020-03-25 16:55:03 +0800 |
|---|---|---|
| committer |   Kees Cook <keescook@chromium.org> | 2020-05-31 19:48:56 -0700 |
| commit | 335426c6dcdd338d6b7c939c2da15fc9c5dd4959 (patch) | |
| tree | ed06b2b7f73bf231b285720ac5cb34b32e3ca64b /include/linux/pstore_zone.h | |
| parent | Documentation: Add details for pstore/blk (diff) | |
| download | wireguard-linux-335426c6dcdd338d6b7c939c2da15fc9c5dd4959.tar.xz wireguard-linux-335426c6dcdd338d6b7c939c2da15fc9c5dd4959.zip | |
pstore/zone: Provide way to skip "broken" zone for MTD devices
One requirement to support MTD devices in pstore/zone is having a
way to declare certain regions as broken. Add this support to
pstore/zone.
The MTD driver should return -ENOMSG when encountering a bad region,
which tells pstore/zone to skip and try the next one.
Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Link: https://lore.kernel.org/lkml/20200511233229.27745-8-keescook@chromium.org/
Co-developed-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: //lore.kernel.org/lkml/20200512173801.222666-1-colin.king@canonical.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'include/linux/pstore_zone.h')
| -rw-r--r-- | include/linux/pstore_zone.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/include/linux/pstore_zone.h b/include/linux/pstore_zone.h index 6f16b0dd834a..e79a18e41064 100644 --- a/include/linux/pstore_zone.h +++ b/include/linux/pstore_zone.h @@ -23,11 +23,15 @@ typedef ssize_t (*pstore_zone_write_op)(const char *, size_t, loff_t); * @read: The general read operation. Both of the function parameters * @size and @offset are relative value to storage. * On success, the number of bytes should be returned, others - * means error. - * @write: The same as @read, but -EBUSY means try to write again later. + * mean error. + * @write: The same as @read, but the following error number: + * -EBUSY means try to write again later. + * -ENOMSG means to try next zone. * @panic_write:The write operation only used for panic case. It's optional - * if you do not care panic log. The parameters and return value - * are the same as @read. + * if you do not care panic log. The parameters are relative + * value to storage. + * On success, the number of bytes should be returned, others + * excluding -ENOMSG mean error. -ENOMSG means to try next zone. */ struct pstore_zone_info { struct module *owner; |