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Message-ID: <20120329153352.11921.78796.stgit@localhost6.localdomain6>
Date: Thu, 29 Mar 2012 19:34:16 +0400
From: Stanislav Kinsbursky <skinsbursky@...allels.com>
To: bfields@...ldses.org
Cc: linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org,
devel@...nvz.org
Subject: [PATCH] NFSd: remove hard-coded dereferences to name-to-id and
id-to-name caches
These dereferences to global static caches are redundant. They also prevents
converting these caches into per-net ones. So this patch is cleanup + precursor
of patch set,a which will make them per-net.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com>
---
fs/nfsd/nfs4idmap.c | 50 ++++++++++++++++++++++++--------------------------
1 files changed, 24 insertions(+), 26 deletions(-)
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index 322d11c..2ff4470 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -183,8 +183,9 @@ warn_no_idmapd(struct cache_detail *detail, int has_died)
static int idtoname_parse(struct cache_detail *, char *, int);
-static struct ent *idtoname_lookup(struct ent *);
-static struct ent *idtoname_update(struct ent *, struct ent *);
+static struct ent *idtoname_lookup(struct cache_detail *, struct ent *);
+static struct ent *idtoname_update(struct cache_detail *, struct ent *,
+ struct ent *);
static struct cache_detail idtoname_cache = {
.owner = THIS_MODULE,
@@ -244,7 +245,7 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
goto out;
error = -ENOMEM;
- res = idtoname_lookup(&ent);
+ res = idtoname_lookup(cd, &ent);
if (!res)
goto out;
@@ -260,11 +261,11 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
else
memcpy(ent.name, buf1, sizeof(ent.name));
error = -ENOMEM;
- res = idtoname_update(&ent, res);
+ res = idtoname_update(cd, &ent, res);
if (res == NULL)
goto out;
- cache_put(&res->h, &idtoname_cache);
+ cache_put(&res->h, cd);
error = 0;
out:
@@ -275,10 +276,9 @@ out:
static struct ent *
-idtoname_lookup(struct ent *item)
+idtoname_lookup(struct cache_detail *cd, struct ent *item)
{
- struct cache_head *ch = sunrpc_cache_lookup(&idtoname_cache,
- &item->h,
+ struct cache_head *ch = sunrpc_cache_lookup(cd, &item->h,
idtoname_hash(item));
if (ch)
return container_of(ch, struct ent, h);
@@ -287,10 +287,9 @@ idtoname_lookup(struct ent *item)
}
static struct ent *
-idtoname_update(struct ent *new, struct ent *old)
+idtoname_update(struct cache_detail *cd, struct ent *new, struct ent *old)
{
- struct cache_head *ch = sunrpc_cache_update(&idtoname_cache,
- &new->h, &old->h,
+ struct cache_head *ch = sunrpc_cache_update(cd, &new->h, &old->h,
idtoname_hash(new));
if (ch)
return container_of(ch, struct ent, h);
@@ -359,8 +358,9 @@ nametoid_show(struct seq_file *m, struct cache_detail *cd, struct cache_head *h)
return 0;
}
-static struct ent *nametoid_lookup(struct ent *);
-static struct ent *nametoid_update(struct ent *, struct ent *);
+static struct ent *nametoid_lookup(struct cache_detail *, struct ent *);
+static struct ent *nametoid_update(struct cache_detail *, struct ent *,
+ struct ent *);
static int nametoid_parse(struct cache_detail *, char *, int);
static struct cache_detail nametoid_cache = {
@@ -426,14 +426,14 @@ nametoid_parse(struct cache_detail *cd, char *buf, int buflen)
set_bit(CACHE_NEGATIVE, &ent.h.flags);
error = -ENOMEM;
- res = nametoid_lookup(&ent);
+ res = nametoid_lookup(cd, &ent);
if (res == NULL)
goto out;
- res = nametoid_update(&ent, res);
+ res = nametoid_update(cd, &ent, res);
if (res == NULL)
goto out;
- cache_put(&res->h, &nametoid_cache);
+ cache_put(&res->h, cd);
error = 0;
out:
kfree(buf1);
@@ -443,10 +443,9 @@ out:
static struct ent *
-nametoid_lookup(struct ent *item)
+nametoid_lookup(struct cache_detail *cd, struct ent *item)
{
- struct cache_head *ch = sunrpc_cache_lookup(&nametoid_cache,
- &item->h,
+ struct cache_head *ch = sunrpc_cache_lookup(cd, &item->h,
nametoid_hash(item));
if (ch)
return container_of(ch, struct ent, h);
@@ -455,10 +454,9 @@ nametoid_lookup(struct ent *item)
}
static struct ent *
-nametoid_update(struct ent *new, struct ent *old)
+nametoid_update(struct cache_detail *cd, struct ent *new, struct ent *old)
{
- struct cache_head *ch = sunrpc_cache_update(&nametoid_cache,
- &new->h, &old->h,
+ struct cache_head *ch = sunrpc_cache_update(cd, &new->h, &old->h,
nametoid_hash(new));
if (ch)
return container_of(ch, struct ent, h);
@@ -493,12 +491,12 @@ nfsd_idmap_shutdown(void)
static int
idmap_lookup(struct svc_rqst *rqstp,
- struct ent *(*lookup_fn)(struct ent *), struct ent *key,
- struct cache_detail *detail, struct ent **item)
+ struct ent *(*lookup_fn)(struct cache_detail *, struct ent *),
+ struct ent *key, struct cache_detail *detail, struct ent **item)
{
int ret;
- *item = lookup_fn(key);
+ *item = lookup_fn(detail, key);
if (!*item)
return -ENOMEM;
retry:
@@ -506,7 +504,7 @@ idmap_lookup(struct svc_rqst *rqstp,
if (ret == -ETIMEDOUT) {
struct ent *prev_item = *item;
- *item = lookup_fn(key);
+ *item = lookup_fn(detail, key);
if (*item != prev_item)
goto retry;
cache_put(&(*item)->h, detail);
--
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