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| author | Seiji Aguchi <seiji.aguchi@hds.com> | 2012-11-14 20:25:37 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-03-20 15:03:27 +0000 |
| commit | 316d0bb70f66a2682c19494f2d1fdebfa00de1ac (patch) | |
| tree | ab22d352664c4f4154ea4e4ed383eda89052c993 /include | |
| parent | 689901ce9cedd2d34a5404dda146d0604cbc2a5e (diff) | |
| download | linux-stable-316d0bb70f66a2682c19494f2d1fdebfa00de1ac.tar.gz linux-stable-316d0bb70f66a2682c19494f2d1fdebfa00de1ac.tar.bz2 linux-stable-316d0bb70f66a2682c19494f2d1fdebfa00de1ac.zip | |
efi_pstore: Check remaining space with QueryVariableInfo() before writing data
commit d80a361d779a9f19498943d1ca84243209cd5647 upstream.
[Issue]
As discussed in a thread below, Running out of space in EFI isn't a well-tested scenario.
And we wouldn't expect all firmware to handle it gracefully.
http://marc.info/?l=linux-kernel&m=134305325801789&w=2
On the other hand, current efi_pstore doesn't check a remaining space of storage at writing time.
Therefore, efi_pstore may not work if it tries to write a large amount of data.
[Patch Description]
To avoid handling the situation above, this patch checks if there is a space enough to log with
QueryVariableInfo() before writing data.
Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com>
Acked-by: Mike Waychison <mikew@google.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/efi.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/efi.h b/include/linux/efi.h index 1721c419c0e7..b94382fce00c 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -470,6 +470,7 @@ struct efivar_operations { efi_get_variable_t *get_variable; efi_get_next_variable_t *get_next_variable; efi_set_variable_t *set_variable; + efi_query_variable_info_t *query_variable_info; }; struct efivars { |