The main idea of this patch set is to call cache request not on kthread
upcall, but on userspace daemon cache_read call. This fixes the problem with
gaining of wrong dentry path after calling d_path() in kthread root context
(svc_export_request() callback), which always work in init root context, but
containers can work in "root jail" - i.e. have it's own nested root.
The following series implements...
---
Stanislav Kinsbursky (4):
SUNRPC: introduce cache_detail->cache_request callback
SUNRPC: remove cache_detail->cache_upcall callback
SUNRPC: remove "cache_request" argument in sunrpc_cache_pipe_upcall() function
SUNRPC: move cache_detail->cache_request callback call to cache_read()
fs/nfs/dns_resolve.c | 2 +-
fs/nfsd/export.c | 14 ++----------
fs/nfsd/nfs4idmap.c | 16 ++-----------
include/linux/sunrpc/cache.h | 11 +++------
net/sunrpc/auth_gss/svcauth_gss.c | 8 +------
net/sunrpc/cache.c | 44 ++++++++++++++++++++-----------------
net/sunrpc/svcauth_unix.c | 14 ++----------
7 files changed, 36 insertions(+), 73 deletions(-)
Passing this pointer is redundant since it's stored on cache_detail structure,
which is also passed to sunrpc_cache_pipe_upcall () function.
Signed-off-by: Stanislav Kinsbursky <[email protected]>
---
fs/nfs/dns_resolve.c | 2 +-
include/linux/sunrpc/cache.h | 6 +-----
net/sunrpc/cache.c | 10 +++-------
3 files changed, 5 insertions(+), 13 deletions(-)
diff --git a/fs/nfs/dns_resolve.c b/fs/nfs/dns_resolve.c
index 90edbd0..f5c4c35 100644
--- a/fs/nfs/dns_resolve.c
+++ b/fs/nfs/dns_resolve.c
@@ -142,7 +142,7 @@ static int nfs_dns_upcall(struct cache_detail *cd,
ret = nfs_cache_upcall(cd, key->hostname);
if (ret)
- ret = sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
+ ret = sunrpc_cache_pipe_upcall(cd, ch);
return ret;
}
diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 249e73a..ea927ea 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -158,11 +158,7 @@ sunrpc_cache_update(struct cache_detail *detail,
struct cache_head *new, struct cache_head *old, int hash);
extern int
-sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h,
- void (*cache_request)(struct cache_detail *,
- struct cache_head *,
- char **,
- int *));
+sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h);
extern void cache_clean_deferred(void *owner);
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index ee6b5dd..901fdca 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -198,7 +198,7 @@ static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h)
{
if (!cd->cache_request)
return -EINVAL;
- return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
+ return sunrpc_cache_pipe_upcall(cd, h);
}
static inline int cache_is_valid(struct cache_detail *detail, struct cache_head *h)
@@ -1140,11 +1140,7 @@ static bool cache_listeners_exist(struct cache_detail *detail)
*
* Each request is at most one page long.
*/
-int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h,
- void (*cache_request)(struct cache_detail *,
- struct cache_head *,
- char **,
- int *))
+int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h)
{
char *buf;
@@ -1169,7 +1165,7 @@ int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h,
bp = buf; len = PAGE_SIZE;
- cache_request(detail, h, &bp, &len);
+ detail->cache_request(detail, h, &bp, &len);
if (len < 0) {
kfree(buf);
This callback will allow to simplify upcalls in further patches in this
series.
Signed-off-by: Stanislav Kinsbursky <[email protected]>
---
fs/nfs/dns_resolve.c | 2 +-
fs/nfsd/export.c | 6 ++++--
fs/nfsd/nfs4idmap.c | 6 ++++--
include/linux/sunrpc/cache.h | 4 ++++
net/sunrpc/auth_gss/svcauth_gss.c | 3 ++-
net/sunrpc/svcauth_unix.c | 6 ++++--
6 files changed, 19 insertions(+), 8 deletions(-)
diff --git a/fs/nfs/dns_resolve.c b/fs/nfs/dns_resolve.c
index 31c26c4..90edbd0 100644
--- a/fs/nfs/dns_resolve.c
+++ b/fs/nfs/dns_resolve.c
@@ -142,7 +142,7 @@ static int nfs_dns_upcall(struct cache_detail *cd,
ret = nfs_cache_upcall(cd, key->hostname);
if (ret)
- ret = sunrpc_cache_pipe_upcall(cd, ch, nfs_dns_request);
+ ret = sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
return ret;
}
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index a3946cf..63ee3bc 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -69,7 +69,7 @@ static void expkey_request(struct cache_detail *cd,
static int expkey_upcall(struct cache_detail *cd, struct cache_head *h)
{
- return sunrpc_cache_pipe_upcall(cd, h, expkey_request);
+ return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
}
static struct svc_expkey *svc_expkey_update(struct cache_detail *cd, struct svc_expkey *new,
@@ -246,6 +246,7 @@ static struct cache_detail svc_expkey_cache_template = {
.name = "nfsd.fh",
.cache_put = expkey_put,
.cache_upcall = expkey_upcall,
+ .cache_request = expkey_request,
.cache_parse = expkey_parse,
.cache_show = expkey_show,
.match = expkey_match,
@@ -339,7 +340,7 @@ static void svc_export_request(struct cache_detail *cd,
static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h)
{
- return sunrpc_cache_pipe_upcall(cd, h, svc_export_request);
+ return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
}
static struct svc_export *svc_export_update(struct svc_export *new,
@@ -712,6 +713,7 @@ static struct cache_detail svc_export_cache_template = {
.name = "nfsd.export",
.cache_put = svc_export_put,
.cache_upcall = svc_export_upcall,
+ .cache_request = svc_export_request,
.cache_parse = svc_export_parse,
.cache_show = svc_export_show,
.match = svc_export_match,
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index a1f10c0..9033dfd 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -142,7 +142,7 @@ idtoname_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
static int
idtoname_upcall(struct cache_detail *cd, struct cache_head *ch)
{
- return sunrpc_cache_pipe_upcall(cd, ch, idtoname_request);
+ return sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
}
static int
@@ -193,6 +193,7 @@ static struct cache_detail idtoname_cache_template = {
.name = "nfs4.idtoname",
.cache_put = ent_put,
.cache_upcall = idtoname_upcall,
+ .cache_request = idtoname_request,
.cache_parse = idtoname_parse,
.cache_show = idtoname_show,
.warn_no_listener = warn_no_idmapd,
@@ -323,7 +324,7 @@ nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
static int
nametoid_upcall(struct cache_detail *cd, struct cache_head *ch)
{
- return sunrpc_cache_pipe_upcall(cd, ch, nametoid_request);
+ return sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
}
static int
@@ -366,6 +367,7 @@ static struct cache_detail nametoid_cache_template = {
.name = "nfs4.nametoid",
.cache_put = ent_put,
.cache_upcall = nametoid_upcall,
+ .cache_request = nametoid_request,
.cache_parse = nametoid_parse,
.cache_show = nametoid_show,
.warn_no_listener = warn_no_idmapd,
diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 5dc9ee4..4f1c858 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -83,6 +83,10 @@ struct cache_detail {
int (*cache_upcall)(struct cache_detail *,
struct cache_head *);
+ void (*cache_request)(struct cache_detail *cd,
+ struct cache_head *ch,
+ char **bpp, int *blen);
+
int (*cache_parse)(struct cache_detail *,
char *buf, int len);
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 73e9573..82437f9 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -184,7 +184,7 @@ static void rsi_request(struct cache_detail *cd,
static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
{
- return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
+ return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
}
@@ -276,6 +276,7 @@ static struct cache_detail rsi_cache_template = {
.name = "auth.rpcsec.init",
.cache_put = rsi_put,
.cache_upcall = rsi_upcall,
+ .cache_request = rsi_request,
.cache_parse = rsi_parse,
.match = rsi_match,
.init = rsi_init,
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 4d01292..6b03cc1 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -159,7 +159,7 @@ static void ip_map_request(struct cache_detail *cd,
static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
{
- return sunrpc_cache_pipe_upcall(cd, h, ip_map_request);
+ return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
}
static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
@@ -472,7 +472,7 @@ static void unix_gid_request(struct cache_detail *cd,
static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
{
- return sunrpc_cache_pipe_upcall(cd, h, unix_gid_request);
+ return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
}
static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, uid_t uid);
@@ -578,6 +578,7 @@ static struct cache_detail unix_gid_cache_template = {
.name = "auth.unix.gid",
.cache_put = unix_gid_put,
.cache_upcall = unix_gid_upcall,
+ .cache_request = unix_gid_request,
.cache_parse = unix_gid_parse,
.cache_show = unix_gid_show,
.match = unix_gid_match,
@@ -875,6 +876,7 @@ static struct cache_detail ip_map_cache_template = {
.name = "auth.unix.ip",
.cache_put = ip_map_put,
.cache_upcall = ip_map_upcall,
+ .cache_request = ip_map_request,
.cache_parse = ip_map_parse,
.cache_show = ip_map_show,
.match = ip_map_match,
31.01.2013 03:00, J. Bruce Fields пишет:
> On Tue, Jan 15, 2013 at 11:09:23AM +0300, Stanislav Kinsbursky wrote:
>> The main idea of this patch set is to call cache request not on kthread
>> upcall, but on userspace daemon cache_read call. This fixes the problem with
>> gaining of wrong dentry path after calling d_path() in kthread root context
>> (svc_export_request() callback), which always work in init root context, but
>> containers can work in "root jail" - i.e. have it's own nested root.
>
> Sorry for the delay. This looks good to me--committing pending some
> testing.
>
> What's left now for basic containerized nfsd support?
>
Sure, thanks!
Not that many patches left: NFSd fs per-net (to get the proper context from the superblock), disabling UMH tracker for a while (again selecting proper root
issue) and removing of error patch for state tracker in current net != &init_net.
They are simple so I'm going to re-send them soon. Just wanna work a bit more on per-net service shutdown first since it looks more urgent.
--
Best regards,
Stanislav Kinsbursky
On Tue, Jan 15, 2013 at 11:09:23AM +0300, Stanislav Kinsbursky wrote:
> The main idea of this patch set is to call cache request not on kthread
> upcall, but on userspace daemon cache_read call. This fixes the problem with
> gaining of wrong dentry path after calling d_path() in kthread root context
> (svc_export_request() callback), which always work in init root context, but
> containers can work in "root jail" - i.e. have it's own nested root.
Sorry for the delay. This looks good to me--committing pending some
testing.
What's left now for basic containerized nfsd support?
--b.
>
> The following series implements...
>
> ---
>
> Stanislav Kinsbursky (4):
> SUNRPC: introduce cache_detail->cache_request callback
> SUNRPC: remove cache_detail->cache_upcall callback
> SUNRPC: remove "cache_request" argument in sunrpc_cache_pipe_upcall() function
> SUNRPC: move cache_detail->cache_request callback call to cache_read()
>
>
> fs/nfs/dns_resolve.c | 2 +-
> fs/nfsd/export.c | 14 ++----------
> fs/nfsd/nfs4idmap.c | 16 ++-----------
> include/linux/sunrpc/cache.h | 11 +++------
> net/sunrpc/auth_gss/svcauth_gss.c | 8 +------
> net/sunrpc/cache.c | 44 ++++++++++++++++++++-----------------
> net/sunrpc/svcauth_unix.c | 14 ++----------
> 7 files changed, 36 insertions(+), 73 deletions(-)
>
This callback is redundant since all that its' implementations are doing is
calling sunrpc_cache_pipe_upcall() with proper function address argument. This
function address is now stored on cache_detail structure and thus all the code
can be simplified.
Signed-off-by: Stanislav Kinsbursky <[email protected]>
---
fs/nfsd/export.c | 12 ------------
fs/nfsd/nfs4idmap.c | 14 --------------
include/linux/sunrpc/cache.h | 3 ---
net/sunrpc/auth_gss/svcauth_gss.c | 7 -------
net/sunrpc/cache.c | 6 +++---
net/sunrpc/svcauth_unix.c | 12 ------------
6 files changed, 3 insertions(+), 51 deletions(-)
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 63ee3bc..6f030a5 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -67,11 +67,6 @@ static void expkey_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
-static int expkey_upcall(struct cache_detail *cd, struct cache_head *h)
-{
- return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
-}
-
static struct svc_expkey *svc_expkey_update(struct cache_detail *cd, struct svc_expkey *new,
struct svc_expkey *old);
static struct svc_expkey *svc_expkey_lookup(struct cache_detail *cd, struct svc_expkey *);
@@ -245,7 +240,6 @@ static struct cache_detail svc_expkey_cache_template = {
.hash_size = EXPKEY_HASHMAX,
.name = "nfsd.fh",
.cache_put = expkey_put,
- .cache_upcall = expkey_upcall,
.cache_request = expkey_request,
.cache_parse = expkey_parse,
.cache_show = expkey_show,
@@ -338,11 +332,6 @@ static void svc_export_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
-static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h)
-{
- return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
-}
-
static struct svc_export *svc_export_update(struct svc_export *new,
struct svc_export *old);
static struct svc_export *svc_export_lookup(struct svc_export *);
@@ -712,7 +701,6 @@ static struct cache_detail svc_export_cache_template = {
.hash_size = EXPORT_HASHMAX,
.name = "nfsd.export",
.cache_put = svc_export_put,
- .cache_upcall = svc_export_upcall,
.cache_request = svc_export_request,
.cache_parse = svc_export_parse,
.cache_show = svc_export_show,
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index 9033dfd..d9402ea 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -140,12 +140,6 @@ idtoname_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
}
static int
-idtoname_upcall(struct cache_detail *cd, struct cache_head *ch)
-{
- return sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
-}
-
-static int
idtoname_match(struct cache_head *ca, struct cache_head *cb)
{
struct ent *a = container_of(ca, struct ent, h);
@@ -192,7 +186,6 @@ static struct cache_detail idtoname_cache_template = {
.hash_size = ENT_HASHMAX,
.name = "nfs4.idtoname",
.cache_put = ent_put,
- .cache_upcall = idtoname_upcall,
.cache_request = idtoname_request,
.cache_parse = idtoname_parse,
.cache_show = idtoname_show,
@@ -322,12 +315,6 @@ nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
}
static int
-nametoid_upcall(struct cache_detail *cd, struct cache_head *ch)
-{
- return sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
-}
-
-static int
nametoid_match(struct cache_head *ca, struct cache_head *cb)
{
struct ent *a = container_of(ca, struct ent, h);
@@ -366,7 +353,6 @@ static struct cache_detail nametoid_cache_template = {
.hash_size = ENT_HASHMAX,
.name = "nfs4.nametoid",
.cache_put = ent_put,
- .cache_upcall = nametoid_upcall,
.cache_request = nametoid_request,
.cache_parse = nametoid_parse,
.cache_show = nametoid_show,
diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 4f1c858..249e73a 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -80,9 +80,6 @@ struct cache_detail {
char *name;
void (*cache_put)(struct kref *);
- int (*cache_upcall)(struct cache_detail *,
- struct cache_head *);
-
void (*cache_request)(struct cache_detail *cd,
struct cache_head *ch,
char **bpp, int *blen);
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 82437f9..1bd18af 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -182,12 +182,6 @@ static void rsi_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
-static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
-{
- return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
-}
-
-
static int rsi_parse(struct cache_detail *cd,
char *mesg, int mlen)
{
@@ -275,7 +269,6 @@ static struct cache_detail rsi_cache_template = {
.hash_size = RSI_HASHMAX,
.name = "auth.rpcsec.init",
.cache_put = rsi_put,
- .cache_upcall = rsi_upcall,
.cache_request = rsi_request,
.cache_parse = rsi_parse,
.match = rsi_match,
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index fc2f7aa..ee6b5dd 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -196,9 +196,9 @@ EXPORT_SYMBOL_GPL(sunrpc_cache_update);
static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h)
{
- if (!cd->cache_upcall)
+ if (!cd->cache_request)
return -EINVAL;
- return cd->cache_upcall(cd, h);
+ return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
}
static inline int cache_is_valid(struct cache_detail *detail, struct cache_head *h)
@@ -1605,7 +1605,7 @@ static int create_cache_proc_entries(struct cache_detail *cd, struct net *net)
if (p == NULL)
goto out_nomem;
- if (cd->cache_upcall || cd->cache_parse) {
+ if (cd->cache_request || cd->cache_parse) {
p = proc_create_data("channel", S_IFREG|S_IRUSR|S_IWUSR,
cd->u.procfs.proc_ent,
&cache_file_operations_procfs, cd);
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 6b03cc1..002ddd9 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -157,11 +157,6 @@ static void ip_map_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
-static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
-{
- return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
-}
-
static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time_t expiry);
@@ -470,11 +465,6 @@ static void unix_gid_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
-static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
-{
- return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
-}
-
static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, uid_t uid);
static int unix_gid_parse(struct cache_detail *cd,
@@ -577,7 +567,6 @@ static struct cache_detail unix_gid_cache_template = {
.hash_size = GID_HASHMAX,
.name = "auth.unix.gid",
.cache_put = unix_gid_put,
- .cache_upcall = unix_gid_upcall,
.cache_request = unix_gid_request,
.cache_parse = unix_gid_parse,
.cache_show = unix_gid_show,
@@ -875,7 +864,6 @@ static struct cache_detail ip_map_cache_template = {
.hash_size = IP_HASHMAX,
.name = "auth.unix.ip",
.cache_put = ip_map_put,
- .cache_upcall = ip_map_upcall,
.cache_request = ip_map_request,
.cache_parse = ip_map_parse,
.cache_show = ip_map_show,
function
The reason to move cache_request() callback call from
sunrpc_cache_pipe_upcall() to cache_read() is that this garantees, that cache
access will be done userspace process context (only userspace process have
proper root context).
This is required for NFSd support in container: svc_export_request() (which is
cache_request callback) calls d_path(), which, in turn, traverse dentry up to
current->fs->root. Kernel threads always have global root, while container
have be in "root jail" - i.e. have it's own nested root.
Signed-off-by: Stanislav Kinsbursky <[email protected]>
---
net/sunrpc/cache.c | 32 ++++++++++++++++++++------------
1 files changed, 20 insertions(+), 12 deletions(-)
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 901fdca..55f044c 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -750,6 +750,18 @@ struct cache_reader {
int offset; /* if non-0, we have a refcnt on next request */
};
+static int cache_request(struct cache_detail *detail,
+ struct cache_request *crq)
+{
+ char *bp = crq->buf;
+ int len = PAGE_SIZE;
+
+ detail->cache_request(detail, crq->item, &bp, &len);
+ if (len < 0)
+ return -EAGAIN;
+ return PAGE_SIZE - len;
+}
+
static ssize_t cache_read(struct file *filp, char __user *buf, size_t count,
loff_t *ppos, struct cache_detail *cd)
{
@@ -784,6 +796,13 @@ static ssize_t cache_read(struct file *filp, char __user *buf, size_t count,
rq->readers++;
spin_unlock(&queue_lock);
+ if (rq->len == 0) {
+ err = cache_request(cd, rq);
+ if (err < 0)
+ goto out;
+ rq->len = err;
+ }
+
if (rp->offset == 0 && !test_bit(CACHE_PENDING, &rq->item->flags)) {
err = -EAGAIN;
spin_lock(&queue_lock);
@@ -1145,8 +1164,6 @@ int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h)
char *buf;
struct cache_request *crq;
- char *bp;
- int len;
if (!cache_listeners_exist(detail)) {
warn_no_listener(detail);
@@ -1163,19 +1180,10 @@ int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h)
return -EAGAIN;
}
- bp = buf; len = PAGE_SIZE;
-
- detail->cache_request(detail, h, &bp, &len);
-
- if (len < 0) {
- kfree(buf);
- kfree(crq);
- return -EAGAIN;
- }
crq->q.reader = 0;
crq->item = cache_get(h);
crq->buf = buf;
- crq->len = PAGE_SIZE - len;
+ crq->len = 0;
crq->readers = 0;
spin_lock(&queue_lock);
list_add_tail(&crq->q.list, &detail->queue);
Bruce, there is a nfs_dns_upcall, which is not just a wrapper around sunrpc_cache_pipe_upcall().
So, please, drop this series. I'll send another one to replace soon.
BTW, there will be two more cleanup patches in the series for NFS DNS cache part.
31.01.2013 03:00, J. Bruce Fields пишет:
> On Tue, Jan 15, 2013 at 11:09:23AM +0300, Stanislav Kinsbursky wrote:
>> The main idea of this patch set is to call cache request not on kthread
>> upcall, but on userspace daemon cache_read call. This fixes the problem with
>> gaining of wrong dentry path after calling d_path() in kthread root context
>> (svc_export_request() callback), which always work in init root context, but
>> containers can work in "root jail" - i.e. have it's own nested root.
>
> Sorry for the delay. This looks good to me--committing pending some
> testing.
>
> What's left now for basic containerized nfsd support?
>
> --b.
>
>>
>> The following series implements...
>>
>> ---
>>
>> Stanislav Kinsbursky (4):
>> SUNRPC: introduce cache_detail->cache_request callback
>> SUNRPC: remove cache_detail->cache_upcall callback
>> SUNRPC: remove "cache_request" argument in sunrpc_cache_pipe_upcall() function
>> SUNRPC: move cache_detail->cache_request callback call to cache_read()
>>
>>
>> fs/nfs/dns_resolve.c | 2 +-
>> fs/nfsd/export.c | 14 ++----------
>> fs/nfsd/nfs4idmap.c | 16 ++-----------
>> include/linux/sunrpc/cache.h | 11 +++------
>> net/sunrpc/auth_gss/svcauth_gss.c | 8 +------
>> net/sunrpc/cache.c | 44 ++++++++++++++++++++-----------------
>> net/sunrpc/svcauth_unix.c | 14 ++----------
>> 7 files changed, 36 insertions(+), 73 deletions(-)
>>
--
Best regards,
Stanislav Kinsbursky
On Tue, 15 Jan 2013 11:09:36 +0300
Stanislav Kinsbursky <[email protected]> wrote:
> This callback is redundant since all that its' implementations are doing is
> calling sunrpc_cache_pipe_upcall() with proper function address argument. This
> function address is now stored on cache_detail structure and thus all the code
> can be simplified.
>
> Signed-off-by: Stanislav Kinsbursky <[email protected]>
> ---
> fs/nfsd/export.c | 12 ------------
> fs/nfsd/nfs4idmap.c | 14 --------------
> include/linux/sunrpc/cache.h | 3 ---
> net/sunrpc/auth_gss/svcauth_gss.c | 7 -------
> net/sunrpc/cache.c | 6 +++---
> net/sunrpc/svcauth_unix.c | 12 ------------
> 6 files changed, 3 insertions(+), 51 deletions(-)
>
> diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
> index 63ee3bc..6f030a5 100644
> --- a/fs/nfsd/export.c
> +++ b/fs/nfsd/export.c
> @@ -67,11 +67,6 @@ static void expkey_request(struct cache_detail *cd,
> (*bpp)[-1] = '\n';
> }
>
> -static int expkey_upcall(struct cache_detail *cd, struct cache_head *h)
> -{
> - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> -}
> -
> static struct svc_expkey *svc_expkey_update(struct cache_detail *cd, struct svc_expkey *new,
> struct svc_expkey *old);
> static struct svc_expkey *svc_expkey_lookup(struct cache_detail *cd, struct svc_expkey *);
> @@ -245,7 +240,6 @@ static struct cache_detail svc_expkey_cache_template = {
> .hash_size = EXPKEY_HASHMAX,
> .name = "nfsd.fh",
> .cache_put = expkey_put,
> - .cache_upcall = expkey_upcall,
> .cache_request = expkey_request,
> .cache_parse = expkey_parse,
> .cache_show = expkey_show,
> @@ -338,11 +332,6 @@ static void svc_export_request(struct cache_detail *cd,
> (*bpp)[-1] = '\n';
> }
>
> -static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h)
> -{
> - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> -}
> -
> static struct svc_export *svc_export_update(struct svc_export *new,
> struct svc_export *old);
> static struct svc_export *svc_export_lookup(struct svc_export *);
> @@ -712,7 +701,6 @@ static struct cache_detail svc_export_cache_template = {
> .hash_size = EXPORT_HASHMAX,
> .name = "nfsd.export",
> .cache_put = svc_export_put,
> - .cache_upcall = svc_export_upcall,
> .cache_request = svc_export_request,
> .cache_parse = svc_export_parse,
> .cache_show = svc_export_show,
> diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
> index 9033dfd..d9402ea 100644
> --- a/fs/nfsd/nfs4idmap.c
> +++ b/fs/nfsd/nfs4idmap.c
> @@ -140,12 +140,6 @@ idtoname_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
> }
>
> static int
> -idtoname_upcall(struct cache_detail *cd, struct cache_head *ch)
> -{
> - return sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
> -}
> -
> -static int
> idtoname_match(struct cache_head *ca, struct cache_head *cb)
> {
> struct ent *a = container_of(ca, struct ent, h);
> @@ -192,7 +186,6 @@ static struct cache_detail idtoname_cache_template = {
> .hash_size = ENT_HASHMAX,
> .name = "nfs4.idtoname",
> .cache_put = ent_put,
> - .cache_upcall = idtoname_upcall,
> .cache_request = idtoname_request,
> .cache_parse = idtoname_parse,
> .cache_show = idtoname_show,
> @@ -322,12 +315,6 @@ nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
> }
>
> static int
> -nametoid_upcall(struct cache_detail *cd, struct cache_head *ch)
> -{
> - return sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
> -}
> -
> -static int
> nametoid_match(struct cache_head *ca, struct cache_head *cb)
> {
> struct ent *a = container_of(ca, struct ent, h);
> @@ -366,7 +353,6 @@ static struct cache_detail nametoid_cache_template = {
> .hash_size = ENT_HASHMAX,
> .name = "nfs4.nametoid",
> .cache_put = ent_put,
> - .cache_upcall = nametoid_upcall,
> .cache_request = nametoid_request,
> .cache_parse = nametoid_parse,
> .cache_show = nametoid_show,
> diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
> index 4f1c858..249e73a 100644
> --- a/include/linux/sunrpc/cache.h
> +++ b/include/linux/sunrpc/cache.h
> @@ -80,9 +80,6 @@ struct cache_detail {
> char *name;
> void (*cache_put)(struct kref *);
>
> - int (*cache_upcall)(struct cache_detail *,
> - struct cache_head *);
> -
> void (*cache_request)(struct cache_detail *cd,
> struct cache_head *ch,
> char **bpp, int *blen);
> diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
> index 82437f9..1bd18af 100644
> --- a/net/sunrpc/auth_gss/svcauth_gss.c
> +++ b/net/sunrpc/auth_gss/svcauth_gss.c
> @@ -182,12 +182,6 @@ static void rsi_request(struct cache_detail *cd,
> (*bpp)[-1] = '\n';
> }
>
> -static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
> -{
> - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> -}
> -
> -
> static int rsi_parse(struct cache_detail *cd,
> char *mesg, int mlen)
> {
> @@ -275,7 +269,6 @@ static struct cache_detail rsi_cache_template = {
> .hash_size = RSI_HASHMAX,
> .name = "auth.rpcsec.init",
> .cache_put = rsi_put,
> - .cache_upcall = rsi_upcall,
> .cache_request = rsi_request,
> .cache_parse = rsi_parse,
> .match = rsi_match,
> diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
> index fc2f7aa..ee6b5dd 100644
> --- a/net/sunrpc/cache.c
> +++ b/net/sunrpc/cache.c
> @@ -196,9 +196,9 @@ EXPORT_SYMBOL_GPL(sunrpc_cache_update);
>
> static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h)
> {
> - if (!cd->cache_upcall)
> + if (!cd->cache_request)
> return -EINVAL;
> - return cd->cache_upcall(cd, h);
> + return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> }
>
> static inline int cache_is_valid(struct cache_detail *detail, struct cache_head *h)
> @@ -1605,7 +1605,7 @@ static int create_cache_proc_entries(struct cache_detail *cd, struct net *net)
> if (p == NULL)
> goto out_nomem;
>
> - if (cd->cache_upcall || cd->cache_parse) {
> + if (cd->cache_request || cd->cache_parse) {
> p = proc_create_data("channel", S_IFREG|S_IRUSR|S_IWUSR,
> cd->u.procfs.proc_ent,
> &cache_file_operations_procfs, cd);
> diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
> index 6b03cc1..002ddd9 100644
> --- a/net/sunrpc/svcauth_unix.c
> +++ b/net/sunrpc/svcauth_unix.c
> @@ -157,11 +157,6 @@ static void ip_map_request(struct cache_detail *cd,
> (*bpp)[-1] = '\n';
> }
>
> -static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
> -{
> - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> -}
> -
> static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
> static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time_t expiry);
>
> @@ -470,11 +465,6 @@ static void unix_gid_request(struct cache_detail *cd,
> (*bpp)[-1] = '\n';
> }
>
> -static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
> -{
> - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> -}
> -
> static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, uid_t uid);
>
> static int unix_gid_parse(struct cache_detail *cd,
> @@ -577,7 +567,6 @@ static struct cache_detail unix_gid_cache_template = {
> .hash_size = GID_HASHMAX,
> .name = "auth.unix.gid",
> .cache_put = unix_gid_put,
> - .cache_upcall = unix_gid_upcall,
> .cache_request = unix_gid_request,
> .cache_parse = unix_gid_parse,
> .cache_show = unix_gid_show,
> @@ -875,7 +864,6 @@ static struct cache_detail ip_map_cache_template = {
> .hash_size = IP_HASHMAX,
> .name = "auth.unix.ip",
> .cache_put = ip_map_put,
> - .cache_upcall = ip_map_upcall,
> .cache_request = ip_map_request,
> .cache_parse = ip_map_parse,
> .cache_show = ip_map_show,
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
I'm seeing a build break from this patch when CONFIG_NFS_USE_KERNEL_DNS
is not set:
CC [M] fs/nfs/dns_resolve.o
fs/nfs/dns_resolve.c: In function ‘nfs_dns_resolver_cache_init’:
fs/nfs/dns_resolve.c:377:4: error: ‘struct cache_detail’ has no member named ‘cache_upcall’
fs/nfs/dns_resolve.c:377:35: warning: left-hand operand of comma expression has no effect [-Wunused-value]
fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
fs/nfs/dns_resolve.c: At top level:
fs/nfs/dns_resolve.c:129:13: warning: ‘nfs_dns_request’ defined but not used [-Wunused-function]
make[1]: *** [fs/nfs/dns_resolve.o] Error 1
make: *** [_module_fs/nfs] Error 2
...looks like you need to convert that cache_detail to use your new
scheme as well?
--
Jeff Layton <[email protected]>
04.02.2013 20:50, Jeff Layton пишет:
> On Tue, 15 Jan 2013 11:09:36 +0300
> Stanislav Kinsbursky <[email protected]> wrote:
>
>> This callback is redundant since all that its' implementations are doing is
>> calling sunrpc_cache_pipe_upcall() with proper function address argument. This
>> function address is now stored on cache_detail structure and thus all the code
>> can be simplified.
>>
>> Signed-off-by: Stanislav Kinsbursky <[email protected]>
>> ---
>> fs/nfsd/export.c | 12 ------------
>> fs/nfsd/nfs4idmap.c | 14 --------------
>> include/linux/sunrpc/cache.h | 3 ---
>> net/sunrpc/auth_gss/svcauth_gss.c | 7 -------
>> net/sunrpc/cache.c | 6 +++---
>> net/sunrpc/svcauth_unix.c | 12 ------------
>> 6 files changed, 3 insertions(+), 51 deletions(-)
>>
>> diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
>> index 63ee3bc..6f030a5 100644
>> --- a/fs/nfsd/export.c
>> +++ b/fs/nfsd/export.c
>> @@ -67,11 +67,6 @@ static void expkey_request(struct cache_detail *cd,
>> (*bpp)[-1] = '\n';
>> }
>>
>> -static int expkey_upcall(struct cache_detail *cd, struct cache_head *h)
>> -{
>> - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
>> -}
>> -
>> static struct svc_expkey *svc_expkey_update(struct cache_detail *cd, struct svc_expkey *new,
>> struct svc_expkey *old);
>> static struct svc_expkey *svc_expkey_lookup(struct cache_detail *cd, struct svc_expkey *);
>> @@ -245,7 +240,6 @@ static struct cache_detail svc_expkey_cache_template = {
>> .hash_size = EXPKEY_HASHMAX,
>> .name = "nfsd.fh",
>> .cache_put = expkey_put,
>> - .cache_upcall = expkey_upcall,
>> .cache_request = expkey_request,
>> .cache_parse = expkey_parse,
>> .cache_show = expkey_show,
>> @@ -338,11 +332,6 @@ static void svc_export_request(struct cache_detail *cd,
>> (*bpp)[-1] = '\n';
>> }
>>
>> -static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h)
>> -{
>> - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
>> -}
>> -
>> static struct svc_export *svc_export_update(struct svc_export *new,
>> struct svc_export *old);
>> static struct svc_export *svc_export_lookup(struct svc_export *);
>> @@ -712,7 +701,6 @@ static struct cache_detail svc_export_cache_template = {
>> .hash_size = EXPORT_HASHMAX,
>> .name = "nfsd.export",
>> .cache_put = svc_export_put,
>> - .cache_upcall = svc_export_upcall,
>> .cache_request = svc_export_request,
>> .cache_parse = svc_export_parse,
>> .cache_show = svc_export_show,
>> diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
>> index 9033dfd..d9402ea 100644
>> --- a/fs/nfsd/nfs4idmap.c
>> +++ b/fs/nfsd/nfs4idmap.c
>> @@ -140,12 +140,6 @@ idtoname_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
>> }
>>
>> static int
>> -idtoname_upcall(struct cache_detail *cd, struct cache_head *ch)
>> -{
>> - return sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
>> -}
>> -
>> -static int
>> idtoname_match(struct cache_head *ca, struct cache_head *cb)
>> {
>> struct ent *a = container_of(ca, struct ent, h);
>> @@ -192,7 +186,6 @@ static struct cache_detail idtoname_cache_template = {
>> .hash_size = ENT_HASHMAX,
>> .name = "nfs4.idtoname",
>> .cache_put = ent_put,
>> - .cache_upcall = idtoname_upcall,
>> .cache_request = idtoname_request,
>> .cache_parse = idtoname_parse,
>> .cache_show = idtoname_show,
>> @@ -322,12 +315,6 @@ nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
>> }
>>
>> static int
>> -nametoid_upcall(struct cache_detail *cd, struct cache_head *ch)
>> -{
>> - return sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
>> -}
>> -
>> -static int
>> nametoid_match(struct cache_head *ca, struct cache_head *cb)
>> {
>> struct ent *a = container_of(ca, struct ent, h);
>> @@ -366,7 +353,6 @@ static struct cache_detail nametoid_cache_template = {
>> .hash_size = ENT_HASHMAX,
>> .name = "nfs4.nametoid",
>> .cache_put = ent_put,
>> - .cache_upcall = nametoid_upcall,
>> .cache_request = nametoid_request,
>> .cache_parse = nametoid_parse,
>> .cache_show = nametoid_show,
>> diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
>> index 4f1c858..249e73a 100644
>> --- a/include/linux/sunrpc/cache.h
>> +++ b/include/linux/sunrpc/cache.h
>> @@ -80,9 +80,6 @@ struct cache_detail {
>> char *name;
>> void (*cache_put)(struct kref *);
>>
>> - int (*cache_upcall)(struct cache_detail *,
>> - struct cache_head *);
>> -
>> void (*cache_request)(struct cache_detail *cd,
>> struct cache_head *ch,
>> char **bpp, int *blen);
>> diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
>> index 82437f9..1bd18af 100644
>> --- a/net/sunrpc/auth_gss/svcauth_gss.c
>> +++ b/net/sunrpc/auth_gss/svcauth_gss.c
>> @@ -182,12 +182,6 @@ static void rsi_request(struct cache_detail *cd,
>> (*bpp)[-1] = '\n';
>> }
>>
>> -static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
>> -{
>> - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
>> -}
>> -
>> -
>> static int rsi_parse(struct cache_detail *cd,
>> char *mesg, int mlen)
>> {
>> @@ -275,7 +269,6 @@ static struct cache_detail rsi_cache_template = {
>> .hash_size = RSI_HASHMAX,
>> .name = "auth.rpcsec.init",
>> .cache_put = rsi_put,
>> - .cache_upcall = rsi_upcall,
>> .cache_request = rsi_request,
>> .cache_parse = rsi_parse,
>> .match = rsi_match,
>> diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
>> index fc2f7aa..ee6b5dd 100644
>> --- a/net/sunrpc/cache.c
>> +++ b/net/sunrpc/cache.c
>> @@ -196,9 +196,9 @@ EXPORT_SYMBOL_GPL(sunrpc_cache_update);
>>
>> static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h)
>> {
>> - if (!cd->cache_upcall)
>> + if (!cd->cache_request)
>> return -EINVAL;
>> - return cd->cache_upcall(cd, h);
>> + return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
>> }
>>
>> static inline int cache_is_valid(struct cache_detail *detail, struct cache_head *h)
>> @@ -1605,7 +1605,7 @@ static int create_cache_proc_entries(struct cache_detail *cd, struct net *net)
>> if (p == NULL)
>> goto out_nomem;
>>
>> - if (cd->cache_upcall || cd->cache_parse) {
>> + if (cd->cache_request || cd->cache_parse) {
>> p = proc_create_data("channel", S_IFREG|S_IRUSR|S_IWUSR,
>> cd->u.procfs.proc_ent,
>> &cache_file_operations_procfs, cd);
>> diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
>> index 6b03cc1..002ddd9 100644
>> --- a/net/sunrpc/svcauth_unix.c
>> +++ b/net/sunrpc/svcauth_unix.c
>> @@ -157,11 +157,6 @@ static void ip_map_request(struct cache_detail *cd,
>> (*bpp)[-1] = '\n';
>> }
>>
>> -static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
>> -{
>> - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
>> -}
>> -
>> static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
>> static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time_t expiry);
>>
>> @@ -470,11 +465,6 @@ static void unix_gid_request(struct cache_detail *cd,
>> (*bpp)[-1] = '\n';
>> }
>>
>> -static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
>> -{
>> - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
>> -}
>> -
>> static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, uid_t uid);
>>
>> static int unix_gid_parse(struct cache_detail *cd,
>> @@ -577,7 +567,6 @@ static struct cache_detail unix_gid_cache_template = {
>> .hash_size = GID_HASHMAX,
>> .name = "auth.unix.gid",
>> .cache_put = unix_gid_put,
>> - .cache_upcall = unix_gid_upcall,
>> .cache_request = unix_gid_request,
>> .cache_parse = unix_gid_parse,
>> .cache_show = unix_gid_show,
>> @@ -875,7 +864,6 @@ static struct cache_detail ip_map_cache_template = {
>> .hash_size = IP_HASHMAX,
>> .name = "auth.unix.ip",
>> .cache_put = ip_map_put,
>> - .cache_upcall = ip_map_upcall,
>> .cache_request = ip_map_request,
>> .cache_parse = ip_map_parse,
>> .cache_show = ip_map_show,
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
>> the body of a message to [email protected]
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>
> I'm seeing a build break from this patch when CONFIG_NFS_USE_KERNEL_DNS
> is not set:
>
> CC [M] fs/nfs/dns_resolve.o
> fs/nfs/dns_resolve.c: In function ‘nfs_dns_resolver_cache_init’:
> fs/nfs/dns_resolve.c:377:4: error: ‘struct cache_detail’ has no member named ‘cache_upcall’
> fs/nfs/dns_resolve.c:377:35: warning: left-hand operand of comma expression has no effect [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c: At top level:
> fs/nfs/dns_resolve.c:129:13: warning: ‘nfs_dns_request’ defined but not used [-Wunused-function]
> make[1]: *** [fs/nfs/dns_resolve.o] Error 1
> make: *** [_module_fs/nfs] Error 2
>
> ...looks like you need to convert that cache_detail to use your new
> scheme as well?
>
Yes, thanks, Jeff!
Have a look at the second version of this series.
--
Best regards,
Stanislav Kinsbursky
On Mon, Feb 04, 2013 at 11:50:02AM -0500, Jeff Layton wrote:
> On Tue, 15 Jan 2013 11:09:36 +0300
> Stanislav Kinsbursky <[email protected]> wrote:
>
> > This callback is redundant since all that its' implementations are doing is
> > calling sunrpc_cache_pipe_upcall() with proper function address argument. This
> > function address is now stored on cache_detail structure and thus all the code
> > can be simplified.
> >
> > Signed-off-by: Stanislav Kinsbursky <[email protected]>
> > ---
> > fs/nfsd/export.c | 12 ------------
> > fs/nfsd/nfs4idmap.c | 14 --------------
> > include/linux/sunrpc/cache.h | 3 ---
> > net/sunrpc/auth_gss/svcauth_gss.c | 7 -------
> > net/sunrpc/cache.c | 6 +++---
> > net/sunrpc/svcauth_unix.c | 12 ------------
> > 6 files changed, 3 insertions(+), 51 deletions(-)
> >
> > diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
> > index 63ee3bc..6f030a5 100644
> > --- a/fs/nfsd/export.c
> > +++ b/fs/nfsd/export.c
> > @@ -67,11 +67,6 @@ static void expkey_request(struct cache_detail *cd,
> > (*bpp)[-1] = '\n';
> > }
> >
> > -static int expkey_upcall(struct cache_detail *cd, struct cache_head *h)
> > -{
> > - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> > -}
> > -
> > static struct svc_expkey *svc_expkey_update(struct cache_detail *cd, struct svc_expkey *new,
> > struct svc_expkey *old);
> > static struct svc_expkey *svc_expkey_lookup(struct cache_detail *cd, struct svc_expkey *);
> > @@ -245,7 +240,6 @@ static struct cache_detail svc_expkey_cache_template = {
> > .hash_size = EXPKEY_HASHMAX,
> > .name = "nfsd.fh",
> > .cache_put = expkey_put,
> > - .cache_upcall = expkey_upcall,
> > .cache_request = expkey_request,
> > .cache_parse = expkey_parse,
> > .cache_show = expkey_show,
> > @@ -338,11 +332,6 @@ static void svc_export_request(struct cache_detail *cd,
> > (*bpp)[-1] = '\n';
> > }
> >
> > -static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h)
> > -{
> > - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> > -}
> > -
> > static struct svc_export *svc_export_update(struct svc_export *new,
> > struct svc_export *old);
> > static struct svc_export *svc_export_lookup(struct svc_export *);
> > @@ -712,7 +701,6 @@ static struct cache_detail svc_export_cache_template = {
> > .hash_size = EXPORT_HASHMAX,
> > .name = "nfsd.export",
> > .cache_put = svc_export_put,
> > - .cache_upcall = svc_export_upcall,
> > .cache_request = svc_export_request,
> > .cache_parse = svc_export_parse,
> > .cache_show = svc_export_show,
> > diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
> > index 9033dfd..d9402ea 100644
> > --- a/fs/nfsd/nfs4idmap.c
> > +++ b/fs/nfsd/nfs4idmap.c
> > @@ -140,12 +140,6 @@ idtoname_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
> > }
> >
> > static int
> > -idtoname_upcall(struct cache_detail *cd, struct cache_head *ch)
> > -{
> > - return sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
> > -}
> > -
> > -static int
> > idtoname_match(struct cache_head *ca, struct cache_head *cb)
> > {
> > struct ent *a = container_of(ca, struct ent, h);
> > @@ -192,7 +186,6 @@ static struct cache_detail idtoname_cache_template = {
> > .hash_size = ENT_HASHMAX,
> > .name = "nfs4.idtoname",
> > .cache_put = ent_put,
> > - .cache_upcall = idtoname_upcall,
> > .cache_request = idtoname_request,
> > .cache_parse = idtoname_parse,
> > .cache_show = idtoname_show,
> > @@ -322,12 +315,6 @@ nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
> > }
> >
> > static int
> > -nametoid_upcall(struct cache_detail *cd, struct cache_head *ch)
> > -{
> > - return sunrpc_cache_pipe_upcall(cd, ch, cd->cache_request);
> > -}
> > -
> > -static int
> > nametoid_match(struct cache_head *ca, struct cache_head *cb)
> > {
> > struct ent *a = container_of(ca, struct ent, h);
> > @@ -366,7 +353,6 @@ static struct cache_detail nametoid_cache_template = {
> > .hash_size = ENT_HASHMAX,
> > .name = "nfs4.nametoid",
> > .cache_put = ent_put,
> > - .cache_upcall = nametoid_upcall,
> > .cache_request = nametoid_request,
> > .cache_parse = nametoid_parse,
> > .cache_show = nametoid_show,
> > diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
> > index 4f1c858..249e73a 100644
> > --- a/include/linux/sunrpc/cache.h
> > +++ b/include/linux/sunrpc/cache.h
> > @@ -80,9 +80,6 @@ struct cache_detail {
> > char *name;
> > void (*cache_put)(struct kref *);
> >
> > - int (*cache_upcall)(struct cache_detail *,
> > - struct cache_head *);
> > -
> > void (*cache_request)(struct cache_detail *cd,
> > struct cache_head *ch,
> > char **bpp, int *blen);
> > diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
> > index 82437f9..1bd18af 100644
> > --- a/net/sunrpc/auth_gss/svcauth_gss.c
> > +++ b/net/sunrpc/auth_gss/svcauth_gss.c
> > @@ -182,12 +182,6 @@ static void rsi_request(struct cache_detail *cd,
> > (*bpp)[-1] = '\n';
> > }
> >
> > -static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
> > -{
> > - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> > -}
> > -
> > -
> > static int rsi_parse(struct cache_detail *cd,
> > char *mesg, int mlen)
> > {
> > @@ -275,7 +269,6 @@ static struct cache_detail rsi_cache_template = {
> > .hash_size = RSI_HASHMAX,
> > .name = "auth.rpcsec.init",
> > .cache_put = rsi_put,
> > - .cache_upcall = rsi_upcall,
> > .cache_request = rsi_request,
> > .cache_parse = rsi_parse,
> > .match = rsi_match,
> > diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
> > index fc2f7aa..ee6b5dd 100644
> > --- a/net/sunrpc/cache.c
> > +++ b/net/sunrpc/cache.c
> > @@ -196,9 +196,9 @@ EXPORT_SYMBOL_GPL(sunrpc_cache_update);
> >
> > static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h)
> > {
> > - if (!cd->cache_upcall)
> > + if (!cd->cache_request)
> > return -EINVAL;
> > - return cd->cache_upcall(cd, h);
> > + return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> > }
> >
> > static inline int cache_is_valid(struct cache_detail *detail, struct cache_head *h)
> > @@ -1605,7 +1605,7 @@ static int create_cache_proc_entries(struct cache_detail *cd, struct net *net)
> > if (p == NULL)
> > goto out_nomem;
> >
> > - if (cd->cache_upcall || cd->cache_parse) {
> > + if (cd->cache_request || cd->cache_parse) {
> > p = proc_create_data("channel", S_IFREG|S_IRUSR|S_IWUSR,
> > cd->u.procfs.proc_ent,
> > &cache_file_operations_procfs, cd);
> > diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
> > index 6b03cc1..002ddd9 100644
> > --- a/net/sunrpc/svcauth_unix.c
> > +++ b/net/sunrpc/svcauth_unix.c
> > @@ -157,11 +157,6 @@ static void ip_map_request(struct cache_detail *cd,
> > (*bpp)[-1] = '\n';
> > }
> >
> > -static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
> > -{
> > - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> > -}
> > -
> > static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
> > static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time_t expiry);
> >
> > @@ -470,11 +465,6 @@ static void unix_gid_request(struct cache_detail *cd,
> > (*bpp)[-1] = '\n';
> > }
> >
> > -static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
> > -{
> > - return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
> > -}
> > -
> > static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, uid_t uid);
> >
> > static int unix_gid_parse(struct cache_detail *cd,
> > @@ -577,7 +567,6 @@ static struct cache_detail unix_gid_cache_template = {
> > .hash_size = GID_HASHMAX,
> > .name = "auth.unix.gid",
> > .cache_put = unix_gid_put,
> > - .cache_upcall = unix_gid_upcall,
> > .cache_request = unix_gid_request,
> > .cache_parse = unix_gid_parse,
> > .cache_show = unix_gid_show,
> > @@ -875,7 +864,6 @@ static struct cache_detail ip_map_cache_template = {
> > .hash_size = IP_HASHMAX,
> > .name = "auth.unix.ip",
> > .cache_put = ip_map_put,
> > - .cache_upcall = ip_map_upcall,
> > .cache_request = ip_map_request,
> > .cache_parse = ip_map_parse,
> > .cache_show = ip_map_show,
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
> > the body of a message to [email protected]
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>
> I'm seeing a build break from this patch when CONFIG_NFS_USE_KERNEL_DNS
> is not set:
>
> CC [M] fs/nfs/dns_resolve.o
> fs/nfs/dns_resolve.c: In function ‘nfs_dns_resolver_cache_init’:
> fs/nfs/dns_resolve.c:377:4: error: ‘struct cache_detail’ has no member named ‘cache_upcall’
> fs/nfs/dns_resolve.c:377:35: warning: left-hand operand of comma expression has no effect [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c:377:35: warning: value computed is not used [-Wunused-value]
> fs/nfs/dns_resolve.c: At top level:
> fs/nfs/dns_resolve.c:129:13: warning: ‘nfs_dns_request’ defined but not used [-Wunused-function]
> make[1]: *** [fs/nfs/dns_resolve.o] Error 1
> make: *** [_module_fs/nfs] Error 2
>
> ...looks like you need to convert that cache_detail to use your new
> scheme as well?
Those patches are gone from my latest tree. Stanislav has some
replacements that should get committed soon.
--b.