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| author |   Pavel Tatashin <pasha.tatashin@soleen.com> | 2020-05-05 11:45:07 -0400 |
|---|---|---|
| committer |   Kees Cook <keescook@chromium.org> | 2020-05-30 10:34:03 -0700 |
| commit | 3524e688b8ee50b0edc76f0e020727eb6c684dbc (patch) | |
| tree | 6ec9d2329912f3a6d0b4f86c2c99e83a64a679b4 /include/linux/pstore.h | |
| parent | printk: Introduce kmsg_dump_reason_str() (diff) | |
| download | wireguard-linux-3524e688b8ee50b0edc76f0e020727eb6c684dbc.tar.xz wireguard-linux-3524e688b8ee50b0edc76f0e020727eb6c684dbc.zip | |
pstore/platform: Pass max_reason to kmesg dump
Add a new member to struct pstore_info for passing information about
kmesg dump maximum reason. This allows a finer control of what kmesg
dumps are sent to pstore storage backends.
Those backends that do not explicitly set this field (keeping it equal to
0), get the default behavior: store only Oopses and Panics, or everything
if the printk.always_kmsg_dump boot param is set.
Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Link: https://lore.kernel.org/lkml/20200515184434.8470-5-keescook@chromium.org/
Co-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'include/linux/pstore.h')
| -rw-r--r-- | include/linux/pstore.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/pstore.h b/include/linux/pstore.h index f6f22b13e04f..eb93a54cff31 100644 --- a/include/linux/pstore.h +++ b/include/linux/pstore.h @@ -96,6 +96,12 @@ struct pstore_record { * * @read_mutex: serializes @open, @read, @close, and @erase callbacks * @flags: bitfield of frontends the backend can accept writes for + * @max_reason: Used when PSTORE_FLAGS_DMESG is set. Contains the + * kmsg_dump_reason enum value. KMSG_DUMP_UNDEF means + * "use existing kmsg_dump() filtering, based on the + * printk.always_kmsg_dump boot param" (which is either + * KMSG_DUMP_OOPS when false, or KMSG_DUMP_MAX when + * true); see printk.always_kmsg_dump for more details. * @data: backend-private pointer passed back during callbacks * * Callbacks: @@ -179,6 +185,7 @@ struct pstore_info { struct mutex read_mutex; int flags; + int max_reason; void *data; int (*open)(struct pstore_info *psi); |