Commit d70bc0c6 authored by Jeff Layton's avatar Jeff Layton Committed by J. Bruce Fields

nfsd/sunrpc: move pool_mode definitions into svc.h

In later patches, we're going to need to allow code external to svc.c
to figure out what pool_mode is in use. Move these definitions into
svc.h to prepare for that.

Also, make the svc_pool_map object available and exported so that other
modules can peek in there to get insight into what pool mode is in use.
Likewise, export svc_pool_map_get/put function to make it safe to do so.
Signed-off-by: default avatarShirley Ma <shirley.ma@oracle.com>
Acked-by: default avatarJeff Layton <jlayton@primarydata.com>
Tested-by: default avatarShirley Ma <shirley.ma@oracle.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent 598e2359
...@@ -427,6 +427,29 @@ struct svc_procedure { ...@@ -427,6 +427,29 @@ struct svc_procedure {
unsigned int pc_xdrressize; /* maximum size of XDR reply */ unsigned int pc_xdrressize; /* maximum size of XDR reply */
}; };
/*
* Mode for mapping cpus to pools.
*/
enum {
SVC_POOL_AUTO = -1, /* choose one of the others */
SVC_POOL_GLOBAL, /* no mapping, just a single global pool
* (legacy & UP mode) */
SVC_POOL_PERCPU, /* one pool per cpu */
SVC_POOL_PERNODE /* one pool per numa node */
};
struct svc_pool_map {
int count; /* How many svc_servs use us */
int mode; /* Note: int not enum to avoid
* warnings about "enumeration value
* not handled in switch" */
unsigned int npools;
unsigned int *pool_to; /* maps pool id to cpu or node */
unsigned int *to_pool; /* maps cpu or node to pool id */
};
extern struct svc_pool_map svc_pool_map;
/* /*
* Function prototypes. * Function prototypes.
*/ */
...@@ -438,6 +461,8 @@ struct svc_serv *svc_create(struct svc_program *, unsigned int, ...@@ -438,6 +461,8 @@ struct svc_serv *svc_create(struct svc_program *, unsigned int,
struct svc_rqst *svc_prepare_thread(struct svc_serv *serv, struct svc_rqst *svc_prepare_thread(struct svc_serv *serv,
struct svc_pool *pool, int node); struct svc_pool *pool, int node);
void svc_exit_thread(struct svc_rqst *); void svc_exit_thread(struct svc_rqst *);
unsigned int svc_pool_map_get(void);
void svc_pool_map_put(void);
struct svc_serv * svc_create_pooled(struct svc_program *, unsigned int, struct svc_serv * svc_create_pooled(struct svc_program *, unsigned int,
struct svc_serv_ops *); struct svc_serv_ops *);
int svc_set_num_threads(struct svc_serv *, struct svc_pool *, int); int svc_set_num_threads(struct svc_serv *, struct svc_pool *, int);
......
...@@ -36,34 +36,17 @@ static void svc_unregister(const struct svc_serv *serv, struct net *net); ...@@ -36,34 +36,17 @@ static void svc_unregister(const struct svc_serv *serv, struct net *net);
#define svc_serv_is_pooled(serv) ((serv)->sv_ops->svo_function) #define svc_serv_is_pooled(serv) ((serv)->sv_ops->svo_function)
/*
* Mode for mapping cpus to pools.
*/
enum {
SVC_POOL_AUTO = -1, /* choose one of the others */
SVC_POOL_GLOBAL, /* no mapping, just a single global pool
* (legacy & UP mode) */
SVC_POOL_PERCPU, /* one pool per cpu */
SVC_POOL_PERNODE /* one pool per numa node */
};
#define SVC_POOL_DEFAULT SVC_POOL_GLOBAL #define SVC_POOL_DEFAULT SVC_POOL_GLOBAL
/* /*
* Structure for mapping cpus to pools and vice versa. * Structure for mapping cpus to pools and vice versa.
* Setup once during sunrpc initialisation. * Setup once during sunrpc initialisation.
*/ */
static struct svc_pool_map { struct svc_pool_map svc_pool_map = {
int count; /* How many svc_servs use us */
int mode; /* Note: int not enum to avoid
* warnings about "enumeration value
* not handled in switch" */
unsigned int npools;
unsigned int *pool_to; /* maps pool id to cpu or node */
unsigned int *to_pool; /* maps cpu or node to pool id */
} svc_pool_map = {
.count = 0,
.mode = SVC_POOL_DEFAULT .mode = SVC_POOL_DEFAULT
}; };
EXPORT_SYMBOL_GPL(svc_pool_map);
static DEFINE_MUTEX(svc_pool_map_mutex);/* protects svc_pool_map.count only */ static DEFINE_MUTEX(svc_pool_map_mutex);/* protects svc_pool_map.count only */
static int static int
...@@ -236,7 +219,7 @@ svc_pool_map_init_pernode(struct svc_pool_map *m) ...@@ -236,7 +219,7 @@ svc_pool_map_init_pernode(struct svc_pool_map *m)
* vice versa). Initialise the map if we're the first user. * vice versa). Initialise the map if we're the first user.
* Returns the number of pools. * Returns the number of pools.
*/ */
static unsigned int unsigned int
svc_pool_map_get(void) svc_pool_map_get(void)
{ {
struct svc_pool_map *m = &svc_pool_map; struct svc_pool_map *m = &svc_pool_map;
...@@ -271,7 +254,7 @@ svc_pool_map_get(void) ...@@ -271,7 +254,7 @@ svc_pool_map_get(void)
mutex_unlock(&svc_pool_map_mutex); mutex_unlock(&svc_pool_map_mutex);
return m->npools; return m->npools;
} }
EXPORT_SYMBOL_GPL(svc_pool_map_get);
/* /*
* Drop a reference to the global map of cpus to pools. * Drop a reference to the global map of cpus to pools.
...@@ -280,7 +263,7 @@ svc_pool_map_get(void) ...@@ -280,7 +263,7 @@ svc_pool_map_get(void)
* mode using the pool_mode module option without * mode using the pool_mode module option without
* rebooting or re-loading sunrpc.ko. * rebooting or re-loading sunrpc.ko.
*/ */
static void void
svc_pool_map_put(void) svc_pool_map_put(void)
{ {
struct svc_pool_map *m = &svc_pool_map; struct svc_pool_map *m = &svc_pool_map;
...@@ -297,7 +280,7 @@ svc_pool_map_put(void) ...@@ -297,7 +280,7 @@ svc_pool_map_put(void)
mutex_unlock(&svc_pool_map_mutex); mutex_unlock(&svc_pool_map_mutex);
} }
EXPORT_SYMBOL_GPL(svc_pool_map_put);
static int svc_pool_map_get_node(unsigned int pidx) static int svc_pool_map_get_node(unsigned int pidx)
{ {
......
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