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SUNRPC: Add a downcall queue to struct rpc_inode 

Currently, the downcall queue is tied to the struct gss_auth, which means
that different RPCSEC_GSS pseudoflavours must use different upcall pipes.
Add a list to struct rpc_inode that can be used instead.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2007-06-07 15:31:36 -04:00
parent 3b68aaeaf5
commit 6e84c7b66a
3 changed files with 12 additions and 19 deletions
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1
include/linux/sunrpc/rpc_pipe_fs.h
View File

@ -23,6 +23,7 @@ struct rpc_inode {
void *private;
struct list_head pipe;
struct list_head in_upcall;
struct list_head in_downcall;
int pipelen;
int nreaders;
int nwriters;

29
net/sunrpc/auth_gss/auth_gss.c
View File

@ -85,7 +85,6 @@ struct gss_auth {
struct rpc_auth rpc_auth;
struct gss_api_mech *mech;
enum rpc_gss_svc service;
struct list_head upcalls;
struct rpc_clnt *client;
struct dentry *dentry;
};
@ -268,10 +267,10 @@ gss_release_msg(struct gss_upcall_msg *gss_msg)
}
static struct gss_upcall_msg *
__gss_find_upcall(struct gss_auth *gss_auth, uid_t uid)
__gss_find_upcall(struct rpc_inode *rpci, uid_t uid)
{
struct gss_upcall_msg *pos;
list_for_each_entry(pos, &gss_auth->upcalls, list) {
list_for_each_entry(pos, &rpci->in_downcall, list) {
if (pos->uid != uid)
continue;
atomic_inc(&pos->count);
@ -290,13 +289,14 @@ static inline struct gss_upcall_msg *
gss_add_msg(struct gss_auth *gss_auth, struct gss_upcall_msg *gss_msg)
{
struct inode *inode = gss_auth->dentry->d_inode;
struct rpc_inode *rpci = RPC_I(inode);
struct gss_upcall_msg *old;
spin_lock(&inode->i_lock);
old = __gss_find_upcall(gss_auth, gss_msg->uid);
old = __gss_find_upcall(rpci, gss_msg->uid);
if (old == NULL) {
atomic_inc(&gss_msg->count);
list_add(&gss_msg->list, &gss_auth->upcalls);
list_add(&gss_msg->list, &rpci->in_downcall);
} else
gss_msg = old;
spin_unlock(&inode->i_lock);
@ -493,7 +493,6 @@ gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
const void *p, *end;
void *buf;
struct rpc_clnt *clnt;
struct gss_auth *gss_auth;
struct gss_upcall_msg *gss_msg;
struct inode *inode = filp->f_path.dentry->d_inode;
struct gss_cl_ctx *ctx;
@ -526,9 +525,8 @@ gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
err = -ENOENT;
/* Find a matching upcall */
gss_auth = container_of(clnt->cl_auth, struct gss_auth, rpc_auth);
spin_lock(&inode->i_lock);
gss_msg = __gss_find_upcall(gss_auth, uid);
gss_msg = __gss_find_upcall(RPC_I(inode), uid);
if (gss_msg == NULL) {
spin_unlock(&inode->i_lock);
goto err_put_ctx;
@ -536,7 +534,7 @@ gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
list_del_init(&gss_msg->list);
spin_unlock(&inode->i_lock);
p = gss_fill_context(p, end, ctx, gss_auth->mech);
p = gss_fill_context(p, end, ctx, gss_msg->auth->mech);
if (IS_ERR(p)) {
err = PTR_ERR(p);
gss_msg->msg.errno = (err == -EACCES) ? -EACCES : -EAGAIN;
@ -563,18 +561,12 @@ static void
gss_pipe_release(struct inode *inode)
{
struct rpc_inode *rpci = RPC_I(inode);
struct rpc_clnt *clnt;
struct rpc_auth *auth;
struct gss_auth *gss_auth;
struct gss_upcall_msg *gss_msg;
clnt = rpci->private;
auth = clnt->cl_auth;
gss_auth = container_of(auth, struct gss_auth, rpc_auth);
spin_lock(&inode->i_lock);
while (!list_empty(&gss_auth->upcalls)) {
struct gss_upcall_msg *gss_msg;
while (!list_empty(&rpci->in_downcall)) {
gss_msg = list_entry(gss_auth->upcalls.next,
gss_msg = list_entry(rpci->in_downcall.next,
struct gss_upcall_msg, list);
gss_msg->msg.errno = -EPIPE;
atomic_inc(&gss_msg->count);
@ -637,7 +629,6 @@ gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor);
if (gss_auth->service == 0)
goto err_put_mech;
INIT_LIST_HEAD(&gss_auth->upcalls);
auth = &gss_auth->rpc_auth;
auth->au_cslack = GSS_CRED_SLACK >> 2;
auth->au_rslack = GSS_VERF_SLACK >> 2;

1
net/sunrpc/rpc_pipe.c
View File

@ -833,6 +833,7 @@ init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
rpci->nreaders = 0;
rpci->nwriters = 0;
INIT_LIST_HEAD(&rpci->in_upcall);
INIT_LIST_HEAD(&rpci->in_downcall);
INIT_LIST_HEAD(&rpci->pipe);
rpci->pipelen = 0;
init_waitqueue_head(&rpci->waitq);