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-rw-r--r--net/sunrpc/auth.c25
-rw-r--r--net/sunrpc/auth_gss/auth_gss.c40
-rw-r--r--net/sunrpc/auth_unix.c6
-rw-r--r--net/sunrpc/rpc_pipe.c102
4 files changed, 111 insertions, 62 deletions
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 9ac1b8c26c0118..8d6f1a176b159f 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -184,7 +184,7 @@ rpcauth_gc_credcache(struct rpc_auth *auth, struct hlist_head *free)
*/
struct rpc_cred *
rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred,
- int taskflags)
+ int flags)
{
struct rpc_cred_cache *cache = auth->au_credcache;
HLIST_HEAD(free);
@@ -193,7 +193,7 @@ rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred,
*cred = NULL;
int nr = 0;
- if (!(taskflags & RPC_TASK_ROOTCREDS))
+ if (!(flags & RPCAUTH_LOOKUP_ROOTCREDS))
nr = acred->uid & RPC_CREDCACHE_MASK;
retry:
spin_lock(&rpc_credcache_lock);
@@ -202,7 +202,7 @@ retry:
hlist_for_each_safe(pos, next, &cache->hashtable[nr]) {
struct rpc_cred *entry;
entry = hlist_entry(pos, struct rpc_cred, cr_hash);
- if (entry->cr_ops->crmatch(acred, entry, taskflags)) {
+ if (entry->cr_ops->crmatch(acred, entry, flags)) {
hlist_del(&entry->cr_hash);
cred = entry;
break;
@@ -224,7 +224,7 @@ retry:
rpcauth_destroy_credlist(&free);
if (!cred) {
- new = auth->au_ops->crcreate(auth, acred, taskflags);
+ new = auth->au_ops->crcreate(auth, acred, flags);
if (!IS_ERR(new)) {
#ifdef RPC_DEBUG
new->cr_magic = RPCAUTH_CRED_MAGIC;
@@ -232,13 +232,21 @@ retry:
goto retry;
} else
cred = new;
+ } else if ((cred->cr_flags & RPCAUTH_CRED_NEW)
+ && cred->cr_ops->cr_init != NULL
+ && !(flags & RPCAUTH_LOOKUP_NEW)) {
+ int res = cred->cr_ops->cr_init(auth, cred);
+ if (res < 0) {
+ put_rpccred(cred);
+ cred = ERR_PTR(res);
+ }
}
return (struct rpc_cred *) cred;
}
struct rpc_cred *
-rpcauth_lookupcred(struct rpc_auth *auth, int taskflags)
+rpcauth_lookupcred(struct rpc_auth *auth, int flags)
{
struct auth_cred acred = {
.uid = current->fsuid,
@@ -250,7 +258,7 @@ rpcauth_lookupcred(struct rpc_auth *auth, int taskflags)
dprintk("RPC: looking up %s cred\n",
auth->au_ops->au_name);
get_group_info(acred.group_info);
- ret = auth->au_ops->lookup_cred(auth, &acred, taskflags);
+ ret = auth->au_ops->lookup_cred(auth, &acred, flags);
put_group_info(acred.group_info);
return ret;
}
@@ -265,11 +273,14 @@ rpcauth_bindcred(struct rpc_task *task)
.group_info = current->group_info,
};
struct rpc_cred *ret;
+ int flags = 0;
dprintk("RPC: %4d looking up %s cred\n",
task->tk_pid, task->tk_auth->au_ops->au_name);
get_group_info(acred.group_info);
- ret = auth->au_ops->lookup_cred(auth, &acred, task->tk_flags);
+ if (task->tk_flags & RPC_TASK_ROOTCREDS)
+ flags |= RPCAUTH_LOOKUP_ROOTCREDS;
+ ret = auth->au_ops->lookup_cred(auth, &acred, flags);
if (!IS_ERR(ret))
task->tk_msg.rpc_cred = ret;
else
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 8d782282ec194c..bb46efd92e5723 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -158,6 +158,7 @@ gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx)
old = gss_cred->gc_ctx;
gss_cred->gc_ctx = ctx;
cred->cr_flags |= RPCAUTH_CRED_UPTODATE;
+ cred->cr_flags &= ~RPCAUTH_CRED_NEW;
write_unlock(&gss_ctx_lock);
if (old)
gss_put_ctx(old);
@@ -580,7 +581,7 @@ gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
} else {
struct auth_cred acred = { .uid = uid };
spin_unlock(&gss_auth->lock);
- cred = rpcauth_lookup_credcache(clnt->cl_auth, &acred, 0);
+ cred = rpcauth_lookup_credcache(clnt->cl_auth, &acred, RPCAUTH_LOOKUP_NEW);
if (IS_ERR(cred)) {
err = PTR_ERR(cred);
goto err_put_ctx;
@@ -758,13 +759,13 @@ gss_destroy_cred(struct rpc_cred *rc)
* Lookup RPCSEC_GSS cred for the current process
*/
static struct rpc_cred *
-gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int taskflags)
+gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
{
- return rpcauth_lookup_credcache(auth, acred, taskflags);
+ return rpcauth_lookup_credcache(auth, acred, flags);
}
static struct rpc_cred *
-gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int taskflags)
+gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
{
struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
struct gss_cred *cred = NULL;
@@ -785,13 +786,8 @@ gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int taskflags)
*/
cred->gc_flags = 0;
cred->gc_base.cr_ops = &gss_credops;
+ cred->gc_base.cr_flags = RPCAUTH_CRED_NEW;
cred->gc_service = gss_auth->service;
- do {
- err = gss_create_upcall(gss_auth, cred);
- } while (err == -EAGAIN);
- if (err < 0)
- goto out_err;
-
return &cred->gc_base;
out_err:
@@ -801,13 +797,34 @@ out_err:
}
static int
-gss_match(struct auth_cred *acred, struct rpc_cred *rc, int taskflags)
+gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred)
+{
+ struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
+ struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base);
+ int err;
+
+ do {
+ err = gss_create_upcall(gss_auth, gss_cred);
+ } while (err == -EAGAIN);
+ return err;
+}
+
+static int
+gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags)
{
struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
+ /*
+ * If the searchflags have set RPCAUTH_LOOKUP_NEW, then
+ * we don't really care if the credential has expired or not,
+ * since the caller should be prepared to reinitialise it.
+ */
+ if ((flags & RPCAUTH_LOOKUP_NEW) && (rc->cr_flags & RPCAUTH_CRED_NEW))
+ goto out;
/* Don't match with creds that have expired. */
if (gss_cred->gc_ctx && time_after(jiffies, gss_cred->gc_ctx->gc_expiry))
return 0;
+out:
return (rc->cr_uid == acred->uid);
}
@@ -1241,6 +1258,7 @@ static struct rpc_authops authgss_ops = {
static struct rpc_credops gss_credops = {
.cr_name = "AUTH_GSS",
.crdestroy = gss_destroy_cred,
+ .cr_init = gss_cred_init,
.crmatch = gss_match,
.crmarshal = gss_marshal,
.crrefresh = gss_refresh,
diff --git a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c
index 1b3ed4fd198735..df14b6bfbf10f9 100644
--- a/net/sunrpc/auth_unix.c
+++ b/net/sunrpc/auth_unix.c
@@ -75,7 +75,7 @@ unx_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
atomic_set(&cred->uc_count, 1);
cred->uc_flags = RPCAUTH_CRED_UPTODATE;
- if (flags & RPC_TASK_ROOTCREDS) {
+ if (flags & RPCAUTH_LOOKUP_ROOTCREDS) {
cred->uc_uid = 0;
cred->uc_gid = 0;
cred->uc_gids[0] = NOGROUP;
@@ -108,12 +108,12 @@ unx_destroy_cred(struct rpc_cred *cred)
* request root creds (e.g. for NFS swapping).
*/
static int
-unx_match(struct auth_cred *acred, struct rpc_cred *rcred, int taskflags)
+unx_match(struct auth_cred *acred, struct rpc_cred *rcred, int flags)
{
struct unx_cred *cred = (struct unx_cred *) rcred;
int i;
- if (!(taskflags & RPC_TASK_ROOTCREDS)) {
+ if (!(flags & RPCAUTH_LOOKUP_ROOTCREDS)) {
int groups;
if (cred->uc_uid != acred->uid
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 9764c80ab0b269..a5c0c7b6e151b4 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -38,44 +38,42 @@ static kmem_cache_t *rpc_inode_cachep __read_mostly;
#define RPC_UPCALL_TIMEOUT (30*HZ)
-static void
-__rpc_purge_list(struct rpc_inode *rpci, struct list_head *head, int err)
+static void rpc_purge_list(struct rpc_inode *rpci, struct list_head *head,
+ void (*destroy_msg)(struct rpc_pipe_msg *), int err)
{
struct rpc_pipe_msg *msg;
- void (*destroy_msg)(struct rpc_pipe_msg *);
- destroy_msg = rpci->ops->destroy_msg;
- while (!list_empty(head)) {
+ if (list_empty(head))
+ return;
+ do {
msg = list_entry(head->next, struct rpc_pipe_msg, list);
- list_del_init(&msg->list);
+ list_del(&msg->list);
msg->errno = err;
destroy_msg(msg);
- }
-}
-
-static void
-__rpc_purge_upcall(struct inode *inode, int err)
-{
- struct rpc_inode *rpci = RPC_I(inode);
-
- __rpc_purge_list(rpci, &rpci->pipe, err);
- rpci->pipelen = 0;
+ } while (!list_empty(head));
wake_up(&rpci->waitq);
}
static void
rpc_timeout_upcall_queue(void *data)
{
+ LIST_HEAD(free_list);
struct rpc_inode *rpci = (struct rpc_inode *)data;
struct inode *inode = &rpci->vfs_inode;
+ void (*destroy_msg)(struct rpc_pipe_msg *);
- mutex_lock(&inode->i_mutex);
- if (rpci->ops == NULL)
- goto out;
- if (rpci->nreaders == 0 && !list_empty(&rpci->pipe))
- __rpc_purge_upcall(inode, -ETIMEDOUT);
-out:
- mutex_unlock(&inode->i_mutex);
+ spin_lock(&inode->i_lock);
+ if (rpci->ops == NULL) {
+ spin_unlock(&inode->i_lock);
+ return;
+ }
+ destroy_msg = rpci->ops->destroy_msg;
+ if (rpci->nreaders == 0) {
+ list_splice_init(&rpci->pipe, &free_list);
+ rpci->pipelen = 0;
+ }
+ spin_unlock(&inode->i_lock);
+ rpc_purge_list(rpci, &free_list, destroy_msg, -ETIMEDOUT);
}
int
@@ -84,7 +82,7 @@ rpc_queue_upcall(struct inode *inode, struct rpc_pipe_msg *msg)
struct rpc_inode *rpci = RPC_I(inode);
int res = -EPIPE;
- mutex_lock(&inode->i_mutex);
+ spin_lock(&inode->i_lock);
if (rpci->ops == NULL)
goto out;
if (rpci->nreaders) {
@@ -100,7 +98,7 @@ rpc_queue_upcall(struct inode *inode, struct rpc_pipe_msg *msg)
res = 0;
}
out:
- mutex_unlock(&inode->i_mutex);
+ spin_unlock(&inode->i_lock);
wake_up(&rpci->waitq);
return res;
}
@@ -115,21 +113,29 @@ static void
rpc_close_pipes(struct inode *inode)
{
struct rpc_inode *rpci = RPC_I(inode);
+ struct rpc_pipe_ops *ops;
mutex_lock(&inode->i_mutex);
- if (rpci->ops != NULL) {
+ ops = rpci->ops;
+ if (ops != NULL) {
+ LIST_HEAD(free_list);
+
+ spin_lock(&inode->i_lock);
rpci->nreaders = 0;
- __rpc_purge_list(rpci, &rpci->in_upcall, -EPIPE);
- __rpc_purge_upcall(inode, -EPIPE);
- rpci->nwriters = 0;
- if (rpci->ops->release_pipe)
- rpci->ops->release_pipe(inode);
+ list_splice_init(&rpci->in_upcall, &free_list);
+ list_splice_init(&rpci->pipe, &free_list);
+ rpci->pipelen = 0;
rpci->ops = NULL;
+ spin_unlock(&inode->i_lock);
+ rpc_purge_list(rpci, &free_list, ops->destroy_msg, -EPIPE);
+ rpci->nwriters = 0;
+ if (ops->release_pipe)
+ ops->release_pipe(inode);
+ cancel_delayed_work(&rpci->queue_timeout);
+ flush_scheduled_work();
}
rpc_inode_setowner(inode, NULL);
mutex_unlock(&inode->i_mutex);
- cancel_delayed_work(&rpci->queue_timeout);
- flush_scheduled_work();
}
static struct inode *
@@ -177,16 +183,26 @@ rpc_pipe_release(struct inode *inode, struct file *filp)
goto out;
msg = (struct rpc_pipe_msg *)filp->private_data;
if (msg != NULL) {
+ spin_lock(&inode->i_lock);
msg->errno = -EAGAIN;
- list_del_init(&msg->list);
+ list_del(&msg->list);
+ spin_unlock(&inode->i_lock);
rpci->ops->destroy_msg(msg);
}
if (filp->f_mode & FMODE_WRITE)
rpci->nwriters --;
- if (filp->f_mode & FMODE_READ)
+ if (filp->f_mode & FMODE_READ) {
rpci->nreaders --;
- if (!rpci->nreaders)
- __rpc_purge_upcall(inode, -EAGAIN);
+ if (rpci->nreaders == 0) {
+ LIST_HEAD(free_list);
+ spin_lock(&inode->i_lock);
+ list_splice_init(&rpci->pipe, &free_list);
+ rpci->pipelen = 0;
+ spin_unlock(&inode->i_lock);
+ rpc_purge_list(rpci, &free_list,
+ rpci->ops->destroy_msg, -EAGAIN);
+ }
+ }
if (rpci->ops->release_pipe)
rpci->ops->release_pipe(inode);
out:
@@ -209,6 +225,7 @@ rpc_pipe_read(struct file *filp, char __user *buf, size_t len, loff_t *offset)
}
msg = filp->private_data;
if (msg == NULL) {
+ spin_lock(&inode->i_lock);
if (!list_empty(&rpci->pipe)) {
msg = list_entry(rpci->pipe.next,
struct rpc_pipe_msg,
@@ -218,6 +235,7 @@ rpc_pipe_read(struct file *filp, char __user *buf, size_t len, loff_t *offset)
filp->private_data = msg;
msg->copied = 0;
}
+ spin_unlock(&inode->i_lock);
if (msg == NULL)
goto out_unlock;
}
@@ -225,7 +243,9 @@ rpc_pipe_read(struct file *filp, char __user *buf, size_t len, loff_t *offset)
res = rpci->ops->upcall(filp, msg, buf, len);
if (res < 0 || msg->len == msg->copied) {
filp->private_data = NULL;
- list_del_init(&msg->list);
+ spin_lock(&inode->i_lock);
+ list_del(&msg->list);
+ spin_unlock(&inode->i_lock);
rpci->ops->destroy_msg(msg);
}
out_unlock:
@@ -610,7 +630,7 @@ rpc_lookup_negative(char *path, struct nameidata *nd)
return ERR_PTR(error);
dir = nd->dentry->d_inode;
mutex_lock(&dir->i_mutex);
- dentry = lookup_hash(nd);
+ dentry = lookup_one_len(nd->last.name, nd->dentry, nd->last.len);
if (IS_ERR(dentry))
goto out_err;
if (dentry->d_inode) {
@@ -672,7 +692,7 @@ rpc_rmdir(char *path)
return error;
dir = nd.dentry->d_inode;
mutex_lock(&dir->i_mutex);
- dentry = lookup_hash(&nd);
+ dentry = lookup_one_len(nd.last.name, nd.dentry, nd.last.len);
if (IS_ERR(dentry)) {
error = PTR_ERR(dentry);
goto out_release;
@@ -733,7 +753,7 @@ rpc_unlink(char *path)
return error;
dir = nd.dentry->d_inode;
mutex_lock(&dir->i_mutex);
- dentry = lookup_hash(&nd);
+ dentry = lookup_one_len(nd.last.name, nd.dentry, nd.last.len);
if (IS_ERR(dentry)) {
error = PTR_ERR(dentry);
goto out_release;
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-30 12:36:32 +0000