AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-28 04:15:07 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

staging: lustre: reorder LOV_MAGIC_* definition

Browse Source 
Since all the LOV_MAGIC_* definitions have the same
postfix values break that value out into its own
definition. With this we can check whether the magic's
postfix match the LOV_MAGIC_MAGIC or not: if yes,
then it is quite possible that the clients has
encountered an newer LOV magic. This extra information
can let us handle those cases more gracefully.

Signed-off-by: Fan Yong <fan.yong@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4941
Reviewed-on: http://review.whamcloud.com/10045
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Fan Yong 2016-08-16 16:18:49 -04:00 committed by Greg Kroah-Hartman
parent 1d5d5ec110
commit afebe4a531
1 changed files with 15 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
View File

@ -1478,11 +1478,21 @@ enum obdo_flags {
OBD_FL_LOCAL_MASK = 0xF0000000,
};
#define LOV_MAGIC_V1 0x0BD10BD0
#define LOV_MAGIC LOV_MAGIC_V1
#define LOV_MAGIC_JOIN_V1 0x0BD20BD0
#define LOV_MAGIC_V3 0x0BD30BD0
#define LOV_MAGIC_MIGRATE 0x0BD40BD0
/*
* All LOV EA magics should have the same postfix, if some new version
* Lustre instroduces new LOV EA magic, then when down-grade to an old
* Lustre, even though the old version system does not recognizes such
* new magic, it still can distinguish the corrupted cases by checking
* the magic's postfix.
*/
#define LOV_MAGIC_MAGIC 0x0BD0
#define LOV_MAGIC_MASK 0xFFFF
#define LOV_MAGIC_V1 (0x0BD10000 | LOV_MAGIC_MAGIC)
#define LOV_MAGIC_JOIN_V1 (0x0BD20000 | LOV_MAGIC_MAGIC)
#define LOV_MAGIC_V3 (0x0BD30000 | LOV_MAGIC_MAGIC)
#define LOV_MAGIC_MIGRATE (0x0BD40000 | LOV_MAGIC_MAGIC)
#define LOV_MAGIC LOV_MAGIC_V1
/*
* magic for fully defined striping