Now that each ore_io_state covers only a single raid group.
A single striping_info math is needed. Embed one inside
ore_io_state to cache the calculation results and eliminate
an extra call.
Also the outer _prepare_for_striping is removed since it does nothing.
Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
---
fs/exofs/ore.c | 61 +++++++++++++++++++-----------------------------
include/scsi/osd_ore.h | 1 +
2 files changed, 25 insertions(+), 37 deletions(-)
diff --git a/fs/exofs/ore.c b/fs/exofs/ore.c
index d54af35..43a53ba 100644
--- a/fs/exofs/ore.c
+++ b/fs/exofs/ore.c
@@ -121,11 +121,9 @@ int ore_get_rw_state(struct ore_layout *layout, struct ore_components *oc,
ios->offset = offset;
if (length) {
- struct ore_striping_info si;
-
- ore_calc_stripe_info(layout, offset, &si);
- ios->length = (length <= si.group_length) ? length :
- si.group_length;
+ ore_calc_stripe_info(layout, offset, &ios->si);
+ ios->length = (length <= ios->si.group_length) ? length :
+ ios->si.group_length;
ios->nr_pages = (ios->length + PAGE_SIZE - 1) / PAGE_SIZE;
}
@@ -416,9 +414,9 @@ static int _add_stripe_unit(struct ore_io_state *ios, unsigned *cur_pg,
return 0;
}
-static int _prepare_one_group(struct ore_io_state *ios, u64 length,
- struct ore_striping_info *si)
+static int _prepare_for_striping(struct ore_io_state *ios)
{
+ struct ore_striping_info *si = &ios->si;
unsigned stripe_unit = ios->layout->stripe_unit;
unsigned mirrors_p1 = ios->layout->mirrors_p1;
unsigned devs_in_group = ios->layout->group_width * mirrors_p1;
@@ -426,8 +424,27 @@ static int _prepare_one_group(struct ore_io_state *ios, u64 length,
unsigned first_dev = dev - (dev % devs_in_group);
unsigned max_comp = ios->numdevs ? ios->numdevs - mirrors_p1 : 0;
unsigned cur_pg = ios->pages_consumed;
+ u64 length = ios->length;
int ret = 0;
+ if (!ios->pages) {
+ if (ios->kern_buff) {
+ struct ore_per_dev_state *per_dev = &ios->per_dev[0];
+
+ per_dev->offset = si->obj_offset;
+ per_dev->dev = si->dev;
+
+ /* no cross device without page array */
+ BUG_ON((ios->layout->group_width > 1) &&
+ (si->unit_off + ios->length >
+ ios->layout->stripe_unit));
+ }
+ ios->numdevs = ios->layout->mirrors_p1;
+ return 0;
+ }
+
+ BUG_ON(length > si->group_length);
+
while (length) {
unsigned comp = dev - first_dev;
struct ore_per_dev_state *per_dev = &ios->per_dev[comp];
@@ -473,36 +490,6 @@ out:
return ret;
}
-static int _prepare_for_striping(struct ore_io_state *ios)
-{
- struct ore_striping_info si;
- int ret;
-
- if (!ios->pages) {
- if (ios->kern_buff) {
- struct ore_per_dev_state *per_dev = &ios->per_dev[0];
-
- ore_calc_stripe_info(ios->layout, ios->offset, &si);
- per_dev->offset = si.obj_offset;
- per_dev->dev = si.dev;
-
- /* no cross device without page array */
- BUG_ON((ios->layout->group_width > 1) &&
- (si.unit_off + ios->length >
- ios->layout->stripe_unit));
- }
- ios->numdevs = ios->layout->mirrors_p1;
- return 0;
- }
-
- ore_calc_stripe_info(ios->layout, ios->offset, &si);
-
- BUG_ON(ios->length > si.group_length);
- ret = _prepare_one_group(ios, ios->length, &si);
-
- return ret;
-}
-
int ore_create(struct ore_io_state *ios)
{
int i, ret;
diff --git a/include/scsi/osd_ore.h b/include/scsi/osd_ore.h
index 8fefdfb..baeef02 100644
--- a/include/scsi/osd_ore.h
+++ b/include/scsi/osd_ore.h
@@ -93,6 +93,7 @@ typedef void (*ore_io_done_fn)(struct ore_io_state *ios, void *private);
struct ore_io_state {
struct kref kref;
+ struct ore_striping_info si;
void *private;
ore_io_done_fn done;
--
1.7.2.3
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