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[PATCH] knfsd: Convert sunrpc_cache to use krefs

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.. it makes some of the code nicer.

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
2006-03-27 01:15:09 -08:00
committed by Linus Torvalds
parent ebd0cb1af3
commit baab935ff3
8 changed files with 72 additions and 84 deletions
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51
fs/nfsd/export.c
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@@ -57,18 +57,17 @@ static int exp_verify_string(char *cp, int max);
#define EXPKEY_HASHMASK (EXPKEY_HASHMAX -1)
static struct cache_head *expkey_table[EXPKEY_HASHMAX];
void expkey_put(struct cache_head *item, struct cache_detail *cd)
void expkey_put(struct kref *ref)
{
if (cache_put(item, cd)) {
struct svc_expkey *key = container_of(item, struct svc_expkey, h);
if (test_bit(CACHE_VALID, &item->flags) &&
!test_bit(CACHE_NEGATIVE, &item->flags)) {
dput(key->ek_dentry);
mntput(key->ek_mnt);
}
auth_domain_put(key->ek_client);
kfree(key);
struct svc_expkey *key = container_of(ref, struct svc_expkey, h.ref);
if (test_bit(CACHE_VALID, &key->h.flags) &&
!test_bit(CACHE_NEGATIVE, &key->h.flags)) {
dput(key->ek_dentry);
mntput(key->ek_mnt);
}
auth_domain_put(key->ek_client);
kfree(key);
}
static void expkey_request(struct cache_detail *cd,
@@ -158,7 +157,7 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
set_bit(CACHE_NEGATIVE, &key.h.flags);
ek = svc_expkey_update(&key, ek);
if (ek)
expkey_put(&ek->h, &svc_expkey_cache);
cache_put(&ek->h, &svc_expkey_cache);
else err = -ENOMEM;
} else {
struct nameidata nd;
@@ -172,7 +171,7 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
ek = svc_expkey_update(&key, ek);
if (ek)
expkey_put(&ek->h, &svc_expkey_cache);
cache_put(&ek->h, &svc_expkey_cache);
else
err = -ENOMEM;
path_release(&nd);
@@ -318,15 +317,13 @@ svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old)
static struct cache_head *export_table[EXPORT_HASHMAX];
void svc_export_put(struct cache_head *item, struct cache_detail *cd)
static void svc_export_put(struct kref *ref)
{
if (cache_put(item, cd)) {
struct svc_export *exp = container_of(item, struct svc_export, h);
dput(exp->ex_dentry);
mntput(exp->ex_mnt);
auth_domain_put(exp->ex_client);
kfree(exp);
}
struct svc_export *exp = container_of(ref, struct svc_export, h.ref);
dput(exp->ex_dentry);
mntput(exp->ex_mnt);
auth_domain_put(exp->ex_client);
kfree(exp);
}
static void svc_export_request(struct cache_detail *cd,
@@ -633,7 +630,7 @@ static int exp_set_key(svc_client *clp, int fsid_type, u32 *fsidv,
if (ek)
ek = svc_expkey_update(&key,ek);
if (ek) {
expkey_put(&ek->h, &svc_expkey_cache);
cache_put(&ek->h, &svc_expkey_cache);
return 0;
}
return -ENOMEM;
@@ -762,7 +759,7 @@ static void exp_fsid_unhash(struct svc_export *exp)
ek = exp_get_fsid_key(exp->ex_client, exp->ex_fsid);
if (ek && !IS_ERR(ek)) {
ek->h.expiry_time = get_seconds()-1;
expkey_put(&ek->h, &svc_expkey_cache);
cache_put(&ek->h, &svc_expkey_cache);
}
svc_expkey_cache.nextcheck = get_seconds();
}
@@ -800,7 +797,7 @@ static void exp_unhash(struct svc_export *exp)
ek = exp_get_key(exp->ex_client, inode->i_sb->s_dev, inode->i_ino);
if (ek && !IS_ERR(ek)) {
ek->h.expiry_time = get_seconds()-1;
expkey_put(&ek->h, &svc_expkey_cache);
cache_put(&ek->h, &svc_expkey_cache);
}
svc_expkey_cache.nextcheck = get_seconds();
}
@@ -902,7 +899,7 @@ finish:
if (exp)
exp_put(exp);
if (fsid_key && !IS_ERR(fsid_key))
expkey_put(&fsid_key->h, &svc_expkey_cache);
cache_put(&fsid_key->h, &svc_expkey_cache);
if (clp)
auth_domain_put(clp);
path_release(&nd);
@@ -1030,7 +1027,7 @@ exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,
return ERR_PTR(PTR_ERR(ek));
exp = exp_get_by_name(clp, ek->ek_mnt, ek->ek_dentry, reqp);
expkey_put(&ek->h, &svc_expkey_cache);
cache_put(&ek->h, &svc_expkey_cache);
if (!exp || IS_ERR(exp))
return ERR_PTR(PTR_ERR(exp));
@@ -1068,7 +1065,7 @@ exp_pseudoroot(struct auth_domain *clp, struct svc_fh *fhp,
else
rv = fh_compose(fhp, exp,
fsid_key->ek_dentry, NULL);
expkey_put(&fsid_key->h, &svc_expkey_cache);
cache_put(&fsid_key->h, &svc_expkey_cache);
return rv;
}
@@ -1187,7 +1184,7 @@ static int e_show(struct seq_file *m, void *p)
cache_get(&exp->h);
if (cache_check(&svc_export_cache, &exp->h, NULL))
return 0;
if (cache_put(&exp->h, &svc_export_cache)) BUG();
cache_put(&exp->h, &svc_export_cache);
return svc_export_show(m, &svc_export_cache, cp);
}