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libceph: primary_affinity infrastructure

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Add primary_affinity infrastructure.  primary_affinity values are
stored in an max_osd-sized array, hanging off ceph_osdmap, similar to
a osd_weight array.

Introduce {get,set}_primary_affinity() helpers, primarily to return
CEPH_OSD_DEFAULT_PRIMARY_AFFINITY when no affinity has been set and to
abstract out osd_primary_affinity array allocation and initialization.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
This commit is contained in:
Ilya Dryomov 2014-03-21 19:05:30 +02:00 • committed by Sage Weil
parent d286de796a
commit 2cfa34f2d6
4 changed files with 57 additions and 2 deletions
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3
include/linux/ceph/osdmap.h
View file

@ -88,6 +88,8 @@ struct ceph_osdmap {
struct rb_root pg_temp;
struct rb_root primary_temp;
u32 *osd_primary_affinity;
struct rb_root pg_pools;
u32 pool_max;
@ -134,6 +136,7 @@ static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag)
}
extern char *ceph_osdmap_state_str(char *str, int len, int state);
extern u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd);
static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map,
int osd)

4
include/linux/ceph/rados.h
View file

@ -133,6 +133,10 @@ extern const char *ceph_osd_state_name(int s);
#define CEPH_OSD_IN 0x10000
#define CEPH_OSD_OUT 0
/* osd primary-affinity. fixed point value: 0x10000 == baseline */
#define CEPH_OSD_MAX_PRIMARY_AFFINITY 0x10000
#define CEPH_OSD_DEFAULT_PRIMARY_AFFINITY 0x10000
/*
* osd map flag bits

5
net/ceph/debugfs.c
View file

@ -77,10 +77,11 @@ static int osdmap_show(struct seq_file *s, void *p)
int state = map->osd_state[i];
char sb[64];
seq_printf(s, "osd%d\t%s\t%3d%%\t(%s)\n",
seq_printf(s, "osd%d\t%s\t%3d%%\t(%s)\t%3d%%\n",
i, ceph_pr_addr(&addr->in_addr),
((map->osd_weight[i]*100) >> 16),
ceph_osdmap_state_str(sb, sizeof(sb), state));
ceph_osdmap_state_str(sb, sizeof(sb), state),
((ceph_get_primary_affinity(map, i)*100) >> 16));
}
for (n = rb_first(&map->pg_temp); n; n = rb_next(n)) {
struct ceph_pg_mapping *pg =

47
net/ceph/osdmap.c
View file

@ -649,6 +649,7 @@ void ceph_osdmap_destroy(struct ceph_osdmap *map)
kfree(map->osd_state);
kfree(map->osd_weight);
kfree(map->osd_addr);
kfree(map->osd_primary_affinity);
kfree(map);
}
@ -685,6 +686,20 @@ static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
map->osd_weight = weight;
map->osd_addr = addr;
if (map->osd_primary_affinity) {
u32 *affinity;
affinity = krealloc(map->osd_primary_affinity,
max*sizeof(*affinity), GFP_NOFS);
if (!affinity)
return -ENOMEM;
for (i = map->max_osd; i < max; i++)
affinity[i] = CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
map->osd_primary_affinity = affinity;
}
map->max_osd = max;
return 0;
@ -912,6 +927,38 @@ static int decode_new_primary_temp(void **p, void *end,
return __decode_primary_temp(p, end, map, true);
}
u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd)
{
BUG_ON(osd >= map->max_osd);
if (!map->osd_primary_affinity)
return CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
return map->osd_primary_affinity[osd];
}
static int set_primary_affinity(struct ceph_osdmap *map, int osd, u32 aff)
{
BUG_ON(osd >= map->max_osd);
if (!map->osd_primary_affinity) {
int i;
map->osd_primary_affinity = kmalloc(map->max_osd*sizeof(u32),
GFP_NOFS);
if (!map->osd_primary_affinity)
return -ENOMEM;
for (i = 0; i < map->max_osd; i++)
map->osd_primary_affinity[i] =
CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
}
map->osd_primary_affinity[osd] = aff;
return 0;
}
/*
* decode a full map.
*/