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md: replace STRIPE_OP_{BIODRAIN,PREXOR,POSTXOR} with 'reconstruct_states'

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From: Dan Williams <dan.j.williams@intel.com>

Track the state of reconstruct operations (recalculating the parity block
usually due to incoming writes, or as part of array expansion)  Reduces the
scope of the STRIPE_OP_{BIODRAIN,PREXOR,POSTXOR} flags to only tracking whether
a reconstruct operation has been requested via the ops_request field of struct
stripe_head_state.

This is the final step in the removal of ops.{pending,ack,complete,count}, i.e.
the STRIPE_OP_{BIODRAIN,PREXOR,POSTXOR} flags only request an operation and do
not track the state of the operation.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Neil Brown <neilb@suse.de>
This commit is contained in:
Dan Williams
2008-06-28 08:32:05 +10:00
committed by Neil Brown
parent 976ea8d475
commit 600aa10993
2 changed files with 63 additions and 150 deletions
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9
include/linux/raid/raid5.h
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@@ -205,19 +205,12 @@ struct stripe_head {
int bm_seq; /* sequence number for bitmap flushes */
int disks; /* disks in stripe */
enum check_states check_state;
enum reconstruct_states reconstruct_state;
/* stripe_operations
* @pending - pending ops flags (set for request->issue->complete)
* @ack - submitted ops flags (set for issue->complete)
* @complete - completed ops flags (set for complete)
* @target - STRIPE_OP_COMPUTE_BLK target
* @count - raid5_runs_ops is set to run when this is non-zero
*/
struct stripe_operations {
unsigned long pending;
unsigned long ack;
unsigned long complete;
int target;
int count;
u32 zero_sum_result;
} ops;
struct r5dev {