[PATCH] knfsd: Use new cache_lookup for svc_expkey cache
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
4f7774c3a0
commit
8d270f7f4c
140
fs/nfsd/export.c
140
fs/nfsd/export.c
@ -57,17 +57,6 @@ static int exp_verify_string(char *cp, int max);
|
||||
#define EXPKEY_HASHMASK (EXPKEY_HASHMAX -1)
|
||||
static struct cache_head *expkey_table[EXPKEY_HASHMAX];
|
||||
|
||||
static inline int svc_expkey_hash(struct svc_expkey *item)
|
||||
{
|
||||
int hash = item->ek_fsidtype;
|
||||
char * cp = (char*)item->ek_fsid;
|
||||
int len = key_len(item->ek_fsidtype);
|
||||
|
||||
hash ^= hash_mem(cp, len, EXPKEY_HASHBITS);
|
||||
hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS);
|
||||
return hash & EXPKEY_HASHMASK;
|
||||
}
|
||||
|
||||
void expkey_put(struct cache_head *item, struct cache_detail *cd)
|
||||
{
|
||||
if (cache_put(item, cd)) {
|
||||
@ -97,7 +86,8 @@ static void expkey_request(struct cache_detail *cd,
|
||||
(*bpp)[-1] = '\n';
|
||||
}
|
||||
|
||||
static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *, int);
|
||||
static struct svc_expkey *svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old);
|
||||
static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *);
|
||||
static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
|
||||
{
|
||||
/* client fsidtype fsid [path] */
|
||||
@ -108,6 +98,7 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
|
||||
int fsidtype;
|
||||
char *ep;
|
||||
struct svc_expkey key;
|
||||
struct svc_expkey *ek;
|
||||
|
||||
if (mesg[mlen-1] != '\n')
|
||||
return -EINVAL;
|
||||
@ -152,20 +143,25 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
|
||||
key.ek_fsidtype = fsidtype;
|
||||
memcpy(key.ek_fsid, buf, len);
|
||||
|
||||
ek = svc_expkey_lookup(&key);
|
||||
err = -ENOMEM;
|
||||
if (!ek)
|
||||
goto out;
|
||||
|
||||
/* now we want a pathname, or empty meaning NEGATIVE */
|
||||
err = -EINVAL;
|
||||
if ((len=qword_get(&mesg, buf, PAGE_SIZE)) < 0)
|
||||
goto out;
|
||||
dprintk("Path seems to be <%s>\n", buf);
|
||||
err = 0;
|
||||
if (len == 0) {
|
||||
struct svc_expkey *ek;
|
||||
set_bit(CACHE_NEGATIVE, &key.h.flags);
|
||||
ek = svc_expkey_lookup(&key, 1);
|
||||
ek = svc_expkey_update(&key, ek);
|
||||
if (ek)
|
||||
expkey_put(&ek->h, &svc_expkey_cache);
|
||||
else err = -ENOMEM;
|
||||
} else {
|
||||
struct nameidata nd;
|
||||
struct svc_expkey *ek;
|
||||
err = path_lookup(buf, 0, &nd);
|
||||
if (err)
|
||||
goto out;
|
||||
@ -174,10 +170,11 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
|
||||
key.ek_mnt = nd.mnt;
|
||||
key.ek_dentry = nd.dentry;
|
||||
|
||||
ek = svc_expkey_lookup(&key, 1);
|
||||
ek = svc_expkey_update(&key, ek);
|
||||
if (ek)
|
||||
expkey_put(&ek->h, &svc_expkey_cache);
|
||||
err = 0;
|
||||
else
|
||||
err = -ENOMEM;
|
||||
path_release(&nd);
|
||||
}
|
||||
cache_flush();
|
||||
@ -214,6 +211,51 @@ static int expkey_show(struct seq_file *m,
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int expkey_match (struct cache_head *a, struct cache_head *b)
|
||||
{
|
||||
struct svc_expkey *orig = container_of(a, struct svc_expkey, h);
|
||||
struct svc_expkey *new = container_of(b, struct svc_expkey, h);
|
||||
|
||||
if (orig->ek_fsidtype != new->ek_fsidtype ||
|
||||
orig->ek_client != new->ek_client ||
|
||||
memcmp(orig->ek_fsid, new->ek_fsid, key_len(orig->ek_fsidtype)) != 0)
|
||||
return 0;
|
||||
return 1;
|
||||
}
|
||||
|
||||
static inline void expkey_init(struct cache_head *cnew,
|
||||
struct cache_head *citem)
|
||||
{
|
||||
struct svc_expkey *new = container_of(cnew, struct svc_expkey, h);
|
||||
struct svc_expkey *item = container_of(citem, struct svc_expkey, h);
|
||||
|
||||
kref_get(&item->ek_client->ref);
|
||||
new->ek_client = item->ek_client;
|
||||
new->ek_fsidtype = item->ek_fsidtype;
|
||||
new->ek_fsid[0] = item->ek_fsid[0];
|
||||
new->ek_fsid[1] = item->ek_fsid[1];
|
||||
new->ek_fsid[2] = item->ek_fsid[2];
|
||||
}
|
||||
|
||||
static inline void expkey_update(struct cache_head *cnew,
|
||||
struct cache_head *citem)
|
||||
{
|
||||
struct svc_expkey *new = container_of(cnew, struct svc_expkey, h);
|
||||
struct svc_expkey *item = container_of(citem, struct svc_expkey, h);
|
||||
|
||||
new->ek_mnt = mntget(item->ek_mnt);
|
||||
new->ek_dentry = dget(item->ek_dentry);
|
||||
}
|
||||
|
||||
static struct cache_head *expkey_alloc(void)
|
||||
{
|
||||
struct svc_expkey *i = kmalloc(sizeof(*i), GFP_KERNEL);
|
||||
if (i)
|
||||
return &i->h;
|
||||
else
|
||||
return NULL;
|
||||
}
|
||||
|
||||
struct cache_detail svc_expkey_cache = {
|
||||
.owner = THIS_MODULE,
|
||||
.hash_size = EXPKEY_HASHMAX,
|
||||
@ -223,34 +265,52 @@ struct cache_detail svc_expkey_cache = {
|
||||
.cache_request = expkey_request,
|
||||
.cache_parse = expkey_parse,
|
||||
.cache_show = expkey_show,
|
||||
.match = expkey_match,
|
||||
.init = expkey_init,
|
||||
.update = expkey_update,
|
||||
.alloc = expkey_alloc,
|
||||
};
|
||||
|
||||
static inline int svc_expkey_match (struct svc_expkey *a, struct svc_expkey *b)
|
||||
static struct svc_expkey *
|
||||
svc_expkey_lookup(struct svc_expkey *item)
|
||||
{
|
||||
if (a->ek_fsidtype != b->ek_fsidtype ||
|
||||
a->ek_client != b->ek_client ||
|
||||
memcmp(a->ek_fsid, b->ek_fsid, key_len(a->ek_fsidtype)) != 0)
|
||||
return 0;
|
||||
return 1;
|
||||
struct cache_head *ch;
|
||||
int hash = item->ek_fsidtype;
|
||||
char * cp = (char*)item->ek_fsid;
|
||||
int len = key_len(item->ek_fsidtype);
|
||||
|
||||
hash ^= hash_mem(cp, len, EXPKEY_HASHBITS);
|
||||
hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS);
|
||||
hash &= EXPKEY_HASHMASK;
|
||||
|
||||
ch = sunrpc_cache_lookup(&svc_expkey_cache, &item->h,
|
||||
hash);
|
||||
if (ch)
|
||||
return container_of(ch, struct svc_expkey, h);
|
||||
else
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline void svc_expkey_init(struct svc_expkey *new, struct svc_expkey *item)
|
||||
static struct svc_expkey *
|
||||
svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old)
|
||||
{
|
||||
kref_get(&item->ek_client->ref);
|
||||
new->ek_client = item->ek_client;
|
||||
new->ek_fsidtype = item->ek_fsidtype;
|
||||
new->ek_fsid[0] = item->ek_fsid[0];
|
||||
new->ek_fsid[1] = item->ek_fsid[1];
|
||||
new->ek_fsid[2] = item->ek_fsid[2];
|
||||
struct cache_head *ch;
|
||||
int hash = new->ek_fsidtype;
|
||||
char * cp = (char*)new->ek_fsid;
|
||||
int len = key_len(new->ek_fsidtype);
|
||||
|
||||
hash ^= hash_mem(cp, len, EXPKEY_HASHBITS);
|
||||
hash ^= hash_ptr(new->ek_client, EXPKEY_HASHBITS);
|
||||
hash &= EXPKEY_HASHMASK;
|
||||
|
||||
ch = sunrpc_cache_update(&svc_expkey_cache, &new->h,
|
||||
&old->h, hash);
|
||||
if (ch)
|
||||
return container_of(ch, struct svc_expkey, h);
|
||||
else
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline void svc_expkey_update(struct svc_expkey *new, struct svc_expkey *item)
|
||||
{
|
||||
new->ek_mnt = mntget(item->ek_mnt);
|
||||
new->ek_dentry = dget(item->ek_dentry);
|
||||
}
|
||||
|
||||
static DefineSimpleCacheLookup(svc_expkey, svc_expkey)
|
||||
|
||||
#define EXPORT_HASHBITS 8
|
||||
#define EXPORT_HASHMAX (1<< EXPORT_HASHBITS)
|
||||
@ -549,7 +609,7 @@ exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp)
|
||||
key.ek_fsidtype = fsid_type;
|
||||
memcpy(key.ek_fsid, fsidv, key_len(fsid_type));
|
||||
|
||||
ek = svc_expkey_lookup(&key, 0);
|
||||
ek = svc_expkey_lookup(&key);
|
||||
if (ek != NULL)
|
||||
if ((err = cache_check(&svc_expkey_cache, &ek->h, reqp)))
|
||||
ek = ERR_PTR(err);
|
||||
@ -569,7 +629,9 @@ static int exp_set_key(svc_client *clp, int fsid_type, u32 *fsidv,
|
||||
key.h.expiry_time = NEVER;
|
||||
key.h.flags = 0;
|
||||
|
||||
ek = svc_expkey_lookup(&key, 1);
|
||||
ek = svc_expkey_lookup(&key);
|
||||
if (ek)
|
||||
ek = svc_expkey_update(&key,ek);
|
||||
if (ek) {
|
||||
expkey_put(&ek->h, &svc_expkey_cache);
|
||||
return 0;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user