forked from Minki/linux
[PATCH] knfsd: Use new cache code for name/id lookup caches
Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown
Linus Torvalds
parent
17f834b6d2
commit
f9ecc921b5
@ -82,9 +82,12 @@ struct ent {
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#define ENT_HASHMAX (1 << ENT_HASHBITS)
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#define ENT_HASHMASK (ENT_HASHMAX - 1)
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static inline void
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ent_init(struct ent *new, struct ent *itm)
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static void
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ent_init(struct cache_head *cnew, struct cache_head *citm)
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{
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struct ent *new = container_of(cnew, struct ent, h);
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struct ent *itm = container_of(citm, struct ent, h);
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new->id = itm->id;
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new->type = itm->type;
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@ -92,12 +95,6 @@ ent_init(struct ent *new, struct ent *itm)
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strlcpy(new->authname, itm->authname, sizeof(new->name));
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}
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static inline void
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ent_update(struct ent *new, struct ent *itm)
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{
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ent_init(new, itm);
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}
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static void
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ent_put(struct cache_head *ch, struct cache_detail *cd)
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{
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@ -107,6 +104,16 @@ ent_put(struct cache_head *ch, struct cache_detail *cd)
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}
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}
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static struct cache_head *
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ent_alloc(void)
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{
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struct ent *e = kmalloc(sizeof(*e), GFP_KERNEL);
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if (e)
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return &e->h;
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else
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return NULL;
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}
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/*
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* ID -> Name cache
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*/
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@ -143,9 +150,12 @@ idtoname_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
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(*bpp)[-1] = '\n';
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}
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static inline int
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idtoname_match(struct ent *a, struct ent *b)
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static int
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idtoname_match(struct cache_head *ca, struct cache_head *cb)
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{
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struct ent *a = container_of(ca, struct ent, h);
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struct ent *b = container_of(cb, struct ent, h);
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return (a->id == b->id && a->type == b->type &&
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strcmp(a->authname, b->authname) == 0);
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}
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@ -178,7 +188,8 @@ warn_no_idmapd(struct cache_detail *detail)
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static int idtoname_parse(struct cache_detail *, char *, int);
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static struct ent *idtoname_lookup(struct ent *, int);
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static struct ent *idtoname_lookup(struct ent *);
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static struct ent *idtoname_update(struct ent *, struct ent *);
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static struct cache_detail idtoname_cache = {
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.owner = THIS_MODULE,
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@ -190,6 +201,10 @@ static struct cache_detail idtoname_cache = {
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.cache_parse = idtoname_parse,
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.cache_show = idtoname_show,
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.warn_no_listener = warn_no_idmapd,
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.match = idtoname_match,
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.init = ent_init,
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.update = ent_init,
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.alloc = ent_alloc,
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};
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int
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@ -232,6 +247,11 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
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if (ent.h.expiry_time == 0)
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goto out;
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error = -ENOMEM;
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res = idtoname_lookup(&ent);
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if (!res)
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goto out;
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/* Name */
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error = qword_get(&buf, buf1, PAGE_SIZE);
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if (error == -EINVAL)
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@ -246,7 +266,8 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
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memcpy(ent.name, buf1, sizeof(ent.name));
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}
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error = -ENOMEM;
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if ((res = idtoname_lookup(&ent, 1)) == NULL)
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res = idtoname_update(&ent, res);
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if (res == NULL)
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goto out;
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ent_put(&res->h, &idtoname_cache);
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@ -258,7 +279,31 @@ out:
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return error;
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}
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static DefineSimpleCacheLookup(ent, idtoname);
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static struct ent *
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idtoname_lookup(struct ent *item)
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{
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struct cache_head *ch = sunrpc_cache_lookup(&idtoname_cache,
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&item->h,
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idtoname_hash(item));
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if (ch)
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return container_of(ch, struct ent, h);
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else
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return NULL;
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}
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static struct ent *
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idtoname_update(struct ent *new, struct ent *old)
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{
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struct cache_head *ch = sunrpc_cache_update(&idtoname_cache,
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&new->h, &old->h,
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idtoname_hash(new));
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if (ch)
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return container_of(ch, struct ent, h);
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else
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return NULL;
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}
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/*
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* Name -> ID cache
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@ -285,9 +330,12 @@ nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
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(*bpp)[-1] = '\n';
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}
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static inline int
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nametoid_match(struct ent *a, struct ent *b)
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static int
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nametoid_match(struct cache_head *ca, struct cache_head *cb)
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{
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struct ent *a = container_of(ca, struct ent, h);
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struct ent *b = container_of(cb, struct ent, h);
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return (a->type == b->type && strcmp(a->name, b->name) == 0 &&
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strcmp(a->authname, b->authname) == 0);
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}
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@ -311,7 +359,8 @@ nametoid_show(struct seq_file *m, struct cache_detail *cd, struct cache_head *h)
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return 0;
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}
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static struct ent *nametoid_lookup(struct ent *, int);
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static struct ent *nametoid_lookup(struct ent *);
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static struct ent *nametoid_update(struct ent *, struct ent *);
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static int nametoid_parse(struct cache_detail *, char *, int);
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static struct cache_detail nametoid_cache = {
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@ -324,6 +373,10 @@ static struct cache_detail nametoid_cache = {
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.cache_parse = nametoid_parse,
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.cache_show = nametoid_show,
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.warn_no_listener = warn_no_idmapd,
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.match = nametoid_match,
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.init = ent_init,
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.update = ent_init,
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.alloc = ent_alloc,
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};
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static int
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@ -373,7 +426,11 @@ nametoid_parse(struct cache_detail *cd, char *buf, int buflen)
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set_bit(CACHE_NEGATIVE, &ent.h.flags);
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error = -ENOMEM;
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if ((res = nametoid_lookup(&ent, 1)) == NULL)
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res = nametoid_lookup(&ent);
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if (res == NULL)
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goto out;
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res = nametoid_update(&ent, res);
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if (res == NULL)
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goto out;
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ent_put(&res->h, &nametoid_cache);
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@ -384,7 +441,30 @@ out:
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return (error);
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}
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static DefineSimpleCacheLookup(ent, nametoid);
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static struct ent *
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nametoid_lookup(struct ent *item)
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{
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struct cache_head *ch = sunrpc_cache_lookup(&nametoid_cache,
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&item->h,
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nametoid_hash(item));
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if (ch)
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return container_of(ch, struct ent, h);
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else
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return NULL;
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}
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static struct ent *
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nametoid_update(struct ent *new, struct ent *old)
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{
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struct cache_head *ch = sunrpc_cache_update(&nametoid_cache,
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&new->h, &old->h,
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nametoid_hash(new));
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if (ch)
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return container_of(ch, struct ent, h);
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else
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return NULL;
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}
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/*
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* Exported API
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@ -452,24 +532,24 @@ idmap_defer(struct cache_req *req)
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}
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static inline int
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do_idmap_lookup(struct ent *(*lookup_fn)(struct ent *, int), struct ent *key,
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do_idmap_lookup(struct ent *(*lookup_fn)(struct ent *), struct ent *key,
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struct cache_detail *detail, struct ent **item,
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struct idmap_defer_req *mdr)
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{
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*item = lookup_fn(key, 0);
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*item = lookup_fn(key);
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if (!*item)
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return -ENOMEM;
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return cache_check(detail, &(*item)->h, &mdr->req);
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}
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static inline int
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do_idmap_lookup_nowait(struct ent *(*lookup_fn)(struct ent *, int),
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do_idmap_lookup_nowait(struct ent *(*lookup_fn)(struct ent *),
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struct ent *key, struct cache_detail *detail,
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struct ent **item)
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{
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int ret = -ENOMEM;
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*item = lookup_fn(key, 0);
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*item = lookup_fn(key);
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if (!*item)
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goto out_err;
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ret = -ETIMEDOUT;
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@ -490,7 +570,7 @@ out_err:
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static int
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idmap_lookup(struct svc_rqst *rqstp,
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struct ent *(*lookup_fn)(struct ent *, int), struct ent *key,
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struct ent *(*lookup_fn)(struct ent *), struct ent *key,
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struct cache_detail *detail, struct ent **item)
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{
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struct idmap_defer_req *mdr;
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