Commit afebe4a5 authored by Fan Yong's avatar Fan Yong Committed by Greg Kroah-Hartman

staging: lustre: reorder LOV_MAGIC_* definition

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: default avatarFan Yong <fan.yong@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4941
Reviewed-on: http://review.whamcloud.com/10045Reviewed-by: default avatarAndreas Dilger <andreas.dilger@intel.com>
Reviewed-by: default avatarOleg Drokin <oleg.drokin@intel.com>
Signed-off-by: default avatarJames Simmons <jsimmons@infradead.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1d5d5ec1
...@@ -1478,11 +1478,21 @@ enum obdo_flags { ...@@ -1478,11 +1478,21 @@ enum obdo_flags {
OBD_FL_LOCAL_MASK = 0xF0000000, OBD_FL_LOCAL_MASK = 0xF0000000,
}; };
#define LOV_MAGIC_V1 0x0BD10BD0 /*
#define LOV_MAGIC LOV_MAGIC_V1 * All LOV EA magics should have the same postfix, if some new version
#define LOV_MAGIC_JOIN_V1 0x0BD20BD0 * Lustre instroduces new LOV EA magic, then when down-grade to an old
#define LOV_MAGIC_V3 0x0BD30BD0 * Lustre, even though the old version system does not recognizes such
#define LOV_MAGIC_MIGRATE 0x0BD40BD0 * 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 * magic for fully defined striping
......
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