Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
new file mode 100644
index 0000000..a33b627
--- /dev/null
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -0,0 +1,1152 @@
+/*
+ * linux/net/sunrpc/auth_gss.c
+ *
+ * RPCSEC_GSS client authentication.
+ *
+ * Copyright (c) 2000 The Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Dug Song <[email protected]>
+ * Andy Adamson <[email protected]>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $Id$
+ */
+
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/sched.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/auth.h>
+#include <linux/sunrpc/auth_gss.h>
+#include <linux/sunrpc/svcauth_gss.h>
+#include <linux/sunrpc/gss_err.h>
+#include <linux/workqueue.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
+#include <linux/sunrpc/gss_api.h>
+#include <asm/uaccess.h>
+
+static struct rpc_authops authgss_ops;
+
+static struct rpc_credops gss_credops;
+
+#ifdef RPC_DEBUG
+# define RPCDBG_FACILITY RPCDBG_AUTH
+#endif
+
+#define NFS_NGROUPS 16
+
+#define GSS_CRED_EXPIRE (60 * HZ) /* XXX: reasonable? */
+#define GSS_CRED_SLACK 1024 /* XXX: unused */
+/* length of a krb5 verifier (48), plus data added before arguments when
+ * using integrity (two 4-byte integers): */
+#define GSS_VERF_SLACK 56
+
+/* XXX this define must match the gssd define
+* as it is passed to gssd to signal the use of
+* machine creds should be part of the shared rpc interface */
+
+#define CA_RUN_AS_MACHINE 0x00000200
+
+/* dump the buffer in `emacs-hexl' style */
+#define isprint(c) ((c > 0x1f) && (c < 0x7f))
+
+static DEFINE_RWLOCK(gss_ctx_lock);
+
+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;
+ char path[48];
+ spinlock_t lock;
+};
+
+static void gss_destroy_ctx(struct gss_cl_ctx *);
+static struct rpc_pipe_ops gss_upcall_ops;
+
+void
+print_hexl(u32 *p, u_int length, u_int offset)
+{
+ u_int i, j, jm;
+ u8 c, *cp;
+
+ dprintk("RPC: print_hexl: length %d\n",length);
+ dprintk("\n");
+ cp = (u8 *) p;
+
+ for (i = 0; i < length; i += 0x10) {
+ dprintk(" %04x: ", (u_int)(i + offset));
+ jm = length - i;
+ jm = jm > 16 ? 16 : jm;
+
+ for (j = 0; j < jm; j++) {
+ if ((j % 2) == 1)
+ dprintk("%02x ", (u_int)cp[i+j]);
+ else
+ dprintk("%02x", (u_int)cp[i+j]);
+ }
+ for (; j < 16; j++) {
+ if ((j % 2) == 1)
+ dprintk(" ");
+ else
+ dprintk(" ");
+ }
+ dprintk(" ");
+
+ for (j = 0; j < jm; j++) {
+ c = cp[i+j];
+ c = isprint(c) ? c : '.';
+ dprintk("%c", c);
+ }
+ dprintk("\n");
+ }
+}
+
+EXPORT_SYMBOL(print_hexl);
+
+static inline struct gss_cl_ctx *
+gss_get_ctx(struct gss_cl_ctx *ctx)
+{
+ atomic_inc(&ctx->count);
+ return ctx;
+}
+
+static inline void
+gss_put_ctx(struct gss_cl_ctx *ctx)
+{
+ if (atomic_dec_and_test(&ctx->count))
+ gss_destroy_ctx(ctx);
+}
+
+static void
+gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx)
+{
+ struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
+ struct gss_cl_ctx *old;
+ write_lock(&gss_ctx_lock);
+ old = gss_cred->gc_ctx;
+ gss_cred->gc_ctx = ctx;
+ cred->cr_flags |= RPCAUTH_CRED_UPTODATE;
+ write_unlock(&gss_ctx_lock);
+ if (old)
+ gss_put_ctx(old);
+}
+
+static int
+gss_cred_is_uptodate_ctx(struct rpc_cred *cred)
+{
+ struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
+ int res = 0;
+
+ read_lock(&gss_ctx_lock);
+ if ((cred->cr_flags & RPCAUTH_CRED_UPTODATE) && gss_cred->gc_ctx)
+ res = 1;
+ read_unlock(&gss_ctx_lock);
+ return res;
+}
+
+static const void *
+simple_get_bytes(const void *p, const void *end, void *res, size_t len)
+{
+ const void *q = (const void *)((const char *)p + len);
+ if (unlikely(q > end || q < p))
+ return ERR_PTR(-EFAULT);
+ memcpy(res, p, len);
+ return q;
+}
+
+static inline const void *
+simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest)
+{
+ const void *q;
+ unsigned int len;
+
+ p = simple_get_bytes(p, end, &len, sizeof(len));
+ if (IS_ERR(p))
+ return p;
+ q = (const void *)((const char *)p + len);
+ if (unlikely(q > end || q < p))
+ return ERR_PTR(-EFAULT);
+ dest->data = kmalloc(len, GFP_KERNEL);
+ if (unlikely(dest->data == NULL))
+ return ERR_PTR(-ENOMEM);
+ dest->len = len;
+ memcpy(dest->data, p, len);
+ return q;
+}
+
+static struct gss_cl_ctx *
+gss_cred_get_ctx(struct rpc_cred *cred)
+{
+ struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
+ struct gss_cl_ctx *ctx = NULL;
+
+ read_lock(&gss_ctx_lock);
+ if (gss_cred->gc_ctx)
+ ctx = gss_get_ctx(gss_cred->gc_ctx);
+ read_unlock(&gss_ctx_lock);
+ return ctx;
+}
+
+static struct gss_cl_ctx *
+gss_alloc_context(void)
+{
+ struct gss_cl_ctx *ctx;
+
+ ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
+ if (ctx != NULL) {
+ memset(ctx, 0, sizeof(*ctx));
+ ctx->gc_proc = RPC_GSS_PROC_DATA;
+ ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */
+ spin_lock_init(&ctx->gc_seq_lock);
+ atomic_set(&ctx->count,1);
+ }
+ return ctx;
+}
+
+#define GSSD_MIN_TIMEOUT (60 * 60)
+static const void *
+gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm)
+{
+ const void *q;
+ unsigned int seclen;
+ unsigned int timeout;
+ u32 window_size;
+ int ret;
+
+ /* First unsigned int gives the lifetime (in seconds) of the cred */
+ p = simple_get_bytes(p, end, &timeout, sizeof(timeout));
+ if (IS_ERR(p))
+ goto err;
+ if (timeout == 0)
+ timeout = GSSD_MIN_TIMEOUT;
+ ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4;
+ /* Sequence number window. Determines the maximum number of simultaneous requests */
+ p = simple_get_bytes(p, end, &window_size, sizeof(window_size));
+ if (IS_ERR(p))
+ goto err;
+ ctx->gc_win = window_size;
+ /* gssd signals an error by passing ctx->gc_win = 0: */
+ if (ctx->gc_win == 0) {
+ /* in which case, p points to an error code which we ignore */
+ p = ERR_PTR(-EACCES);
+ goto err;
+ }
+ /* copy the opaque wire context */
+ p = simple_get_netobj(p, end, &ctx->gc_wire_ctx);
+ if (IS_ERR(p))
+ goto err;
+ /* import the opaque security context */
+ p = simple_get_bytes(p, end, &seclen, sizeof(seclen));
+ if (IS_ERR(p))
+ goto err;
+ q = (const void *)((const char *)p + seclen);
+ if (unlikely(q > end || q < p)) {
+ p = ERR_PTR(-EFAULT);
+ goto err;
+ }
+ ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx);
+ if (ret < 0) {
+ p = ERR_PTR(ret);
+ goto err;
+ }
+ return q;
+err:
+ dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p));
+ return p;
+}
+
+
+struct gss_upcall_msg {
+ atomic_t count;
+ uid_t uid;
+ struct rpc_pipe_msg msg;
+ struct list_head list;
+ struct gss_auth *auth;
+ struct rpc_wait_queue rpc_waitqueue;
+ wait_queue_head_t waitqueue;
+ struct gss_cl_ctx *ctx;
+};
+
+static void
+gss_release_msg(struct gss_upcall_msg *gss_msg)
+{
+ if (!atomic_dec_and_test(&gss_msg->count))
+ return;
+ BUG_ON(!list_empty(&gss_msg->list));
+ if (gss_msg->ctx != NULL)
+ gss_put_ctx(gss_msg->ctx);
+ kfree(gss_msg);
+}
+
+static struct gss_upcall_msg *
+__gss_find_upcall(struct gss_auth *gss_auth, uid_t uid)
+{
+ struct gss_upcall_msg *pos;
+ list_for_each_entry(pos, &gss_auth->upcalls, list) {
+ if (pos->uid != uid)
+ continue;
+ atomic_inc(&pos->count);
+ dprintk("RPC: gss_find_upcall found msg %p\n", pos);
+ return pos;
+ }
+ dprintk("RPC: gss_find_upcall found nothing\n");
+ return NULL;
+}
+
+/* Try to add a upcall to the pipefs queue.
+ * If an upcall owned by our uid already exists, then we return a reference
+ * to that upcall instead of adding the new upcall.
+ */
+static inline struct gss_upcall_msg *
+gss_add_msg(struct gss_auth *gss_auth, struct gss_upcall_msg *gss_msg)
+{
+ struct gss_upcall_msg *old;
+
+ spin_lock(&gss_auth->lock);
+ old = __gss_find_upcall(gss_auth, gss_msg->uid);
+ if (old == NULL) {
+ atomic_inc(&gss_msg->count);
+ list_add(&gss_msg->list, &gss_auth->upcalls);
+ } else
+ gss_msg = old;
+ spin_unlock(&gss_auth->lock);
+ return gss_msg;
+}
+
+static void
+__gss_unhash_msg(struct gss_upcall_msg *gss_msg)
+{
+ if (list_empty(&gss_msg->list))
+ return;
+ list_del_init(&gss_msg->list);
+ rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno);
+ wake_up_all(&gss_msg->waitqueue);
+ atomic_dec(&gss_msg->count);
+}
+
+static void
+gss_unhash_msg(struct gss_upcall_msg *gss_msg)
+{
+ struct gss_auth *gss_auth = gss_msg->auth;
+
+ spin_lock(&gss_auth->lock);
+ __gss_unhash_msg(gss_msg);
+ spin_unlock(&gss_auth->lock);
+}
+
+static void
+gss_upcall_callback(struct rpc_task *task)
+{
+ struct gss_cred *gss_cred = container_of(task->tk_msg.rpc_cred,
+ struct gss_cred, gc_base);
+ struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall;
+
+ BUG_ON(gss_msg == NULL);
+ if (gss_msg->ctx)
+ gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_get_ctx(gss_msg->ctx));
+ else
+ task->tk_status = gss_msg->msg.errno;
+ spin_lock(&gss_msg->auth->lock);
+ gss_cred->gc_upcall = NULL;
+ rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno);
+ spin_unlock(&gss_msg->auth->lock);
+ gss_release_msg(gss_msg);
+}
+
+static inline struct gss_upcall_msg *
+gss_alloc_msg(struct gss_auth *gss_auth, uid_t uid)
+{
+ struct gss_upcall_msg *gss_msg;
+
+ gss_msg = kmalloc(sizeof(*gss_msg), GFP_KERNEL);
+ if (gss_msg != NULL) {
+ memset(gss_msg, 0, sizeof(*gss_msg));
+ INIT_LIST_HEAD(&gss_msg->list);
+ rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq");
+ init_waitqueue_head(&gss_msg->waitqueue);
+ atomic_set(&gss_msg->count, 1);
+ gss_msg->msg.data = &gss_msg->uid;
+ gss_msg->msg.len = sizeof(gss_msg->uid);
+ gss_msg->uid = uid;
+ gss_msg->auth = gss_auth;
+ }
+ return gss_msg;
+}
+
+static struct gss_upcall_msg *
+gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred)
+{
+ struct gss_upcall_msg *gss_new, *gss_msg;
+
+ gss_new = gss_alloc_msg(gss_auth, cred->cr_uid);
+ if (gss_new == NULL)
+ return ERR_PTR(-ENOMEM);
+ gss_msg = gss_add_msg(gss_auth, gss_new);
+ if (gss_msg == gss_new) {
+ int res = rpc_queue_upcall(gss_auth->dentry->d_inode, &gss_new->msg);
+ if (res) {
+ gss_unhash_msg(gss_new);
+ gss_msg = ERR_PTR(res);
+ }
+ } else
+ gss_release_msg(gss_new);
+ return gss_msg;
+}
+
+static inline int
+gss_refresh_upcall(struct rpc_task *task)
+{
+ struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct gss_auth *gss_auth = container_of(task->tk_client->cl_auth,
+ struct gss_auth, rpc_auth);
+ struct gss_cred *gss_cred = container_of(cred,
+ struct gss_cred, gc_base);
+ struct gss_upcall_msg *gss_msg;
+ int err = 0;
+
+ dprintk("RPC: %4u gss_refresh_upcall for uid %u\n", task->tk_pid, cred->cr_uid);
+ gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred);
+ if (IS_ERR(gss_msg)) {
+ err = PTR_ERR(gss_msg);
+ goto out;
+ }
+ spin_lock(&gss_auth->lock);
+ if (gss_cred->gc_upcall != NULL)
+ rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL, NULL);
+ else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) {
+ task->tk_timeout = 0;
+ gss_cred->gc_upcall = gss_msg;
+ /* gss_upcall_callback will release the reference to gss_upcall_msg */
+ atomic_inc(&gss_msg->count);
+ rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback, NULL);
+ } else
+ err = gss_msg->msg.errno;
+ spin_unlock(&gss_auth->lock);
+ gss_release_msg(gss_msg);
+out:
+ dprintk("RPC: %4u gss_refresh_upcall for uid %u result %d\n", task->tk_pid,
+ cred->cr_uid, err);
+ return err;
+}
+
+static inline int
+gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred)
+{
+ struct rpc_cred *cred = &gss_cred->gc_base;
+ struct gss_upcall_msg *gss_msg;
+ DEFINE_WAIT(wait);
+ int err = 0;
+
+ dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid);
+ gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred);
+ if (IS_ERR(gss_msg)) {
+ err = PTR_ERR(gss_msg);
+ goto out;
+ }
+ for (;;) {
+ prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE);
+ spin_lock(&gss_auth->lock);
+ if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) {
+ spin_unlock(&gss_auth->lock);
+ break;
+ }
+ spin_unlock(&gss_auth->lock);
+ if (signalled()) {
+ err = -ERESTARTSYS;
+ goto out_intr;
+ }
+ schedule();
+ }
+ if (gss_msg->ctx)
+ gss_cred_set_ctx(cred, gss_get_ctx(gss_msg->ctx));
+ else
+ err = gss_msg->msg.errno;
+out_intr:
+ finish_wait(&gss_msg->waitqueue, &wait);
+ gss_release_msg(gss_msg);
+out:
+ dprintk("RPC: gss_create_upcall for uid %u result %d\n", cred->cr_uid, err);
+ return err;
+}
+
+static ssize_t
+gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg,
+ char __user *dst, size_t buflen)
+{
+ char *data = (char *)msg->data + msg->copied;
+ ssize_t mlen = msg->len;
+ ssize_t left;
+
+ if (mlen > buflen)
+ mlen = buflen;
+ left = copy_to_user(dst, data, mlen);
+ if (left < 0) {
+ msg->errno = left;
+ return left;
+ }
+ mlen -= left;
+ msg->copied += mlen;
+ msg->errno = 0;
+ return mlen;
+}
+
+#define MSG_BUF_MAXSIZE 1024
+
+static ssize_t
+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 rpc_cred *cred;
+ struct gss_upcall_msg *gss_msg;
+ struct gss_cl_ctx *ctx;
+ uid_t uid;
+ int err = -EFBIG;
+
+ if (mlen > MSG_BUF_MAXSIZE)
+ goto out;
+ err = -ENOMEM;
+ buf = kmalloc(mlen, GFP_KERNEL);
+ if (!buf)
+ goto out;
+
+ clnt = RPC_I(filp->f_dentry->d_inode)->private;
+ err = -EFAULT;
+ if (copy_from_user(buf, src, mlen))
+ goto err;
+
+ end = (const void *)((char *)buf + mlen);
+ p = simple_get_bytes(buf, end, &uid, sizeof(uid));
+ if (IS_ERR(p)) {
+ err = PTR_ERR(p);
+ goto err;
+ }
+
+ err = -ENOMEM;
+ ctx = gss_alloc_context();
+ if (ctx == NULL)
+ goto err;
+ err = 0;
+ gss_auth = container_of(clnt->cl_auth, struct gss_auth, rpc_auth);
+ p = gss_fill_context(p, end, ctx, gss_auth->mech);
+ if (IS_ERR(p)) {
+ err = PTR_ERR(p);
+ if (err != -EACCES)
+ goto err_put_ctx;
+ }
+ spin_lock(&gss_auth->lock);
+ gss_msg = __gss_find_upcall(gss_auth, uid);
+ if (gss_msg) {
+ if (err == 0 && gss_msg->ctx == NULL)
+ gss_msg->ctx = gss_get_ctx(ctx);
+ gss_msg->msg.errno = err;
+ __gss_unhash_msg(gss_msg);
+ spin_unlock(&gss_auth->lock);
+ gss_release_msg(gss_msg);
+ } else {
+ struct auth_cred acred = { .uid = uid };
+ spin_unlock(&gss_auth->lock);
+ cred = rpcauth_lookup_credcache(clnt->cl_auth, &acred, 0);
+ if (IS_ERR(cred)) {
+ err = PTR_ERR(cred);
+ goto err_put_ctx;
+ }
+ gss_cred_set_ctx(cred, gss_get_ctx(ctx));
+ }
+ gss_put_ctx(ctx);
+ kfree(buf);
+ dprintk("RPC: gss_pipe_downcall returning length %Zu\n", mlen);
+ return mlen;
+err_put_ctx:
+ gss_put_ctx(ctx);
+err:
+ kfree(buf);
+out:
+ dprintk("RPC: gss_pipe_downcall returning %d\n", err);
+ return err;
+}
+
+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;
+
+ clnt = rpci->private;
+ auth = clnt->cl_auth;
+ gss_auth = container_of(auth, struct gss_auth, rpc_auth);
+ spin_lock(&gss_auth->lock);
+ while (!list_empty(&gss_auth->upcalls)) {
+ struct gss_upcall_msg *gss_msg;
+
+ gss_msg = list_entry(gss_auth->upcalls.next,
+ struct gss_upcall_msg, list);
+ gss_msg->msg.errno = -EPIPE;
+ atomic_inc(&gss_msg->count);
+ __gss_unhash_msg(gss_msg);
+ spin_unlock(&gss_auth->lock);
+ gss_release_msg(gss_msg);
+ spin_lock(&gss_auth->lock);
+ }
+ spin_unlock(&gss_auth->lock);
+}
+
+static void
+gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
+{
+ struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg);
+ static unsigned long ratelimit;
+
+ if (msg->errno < 0) {
+ dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n",
+ gss_msg);
+ atomic_inc(&gss_msg->count);
+ gss_unhash_msg(gss_msg);
+ if (msg->errno == -ETIMEDOUT || msg->errno == -EPIPE) {
+ unsigned long now = jiffies;
+ if (time_after(now, ratelimit)) {
+ printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n"
+ "Please check user daemon is running!\n");
+ ratelimit = now + 15*HZ;
+ }
+ }
+ gss_release_msg(gss_msg);
+ }
+}
+
+/*
+ * NOTE: we have the opportunity to use different
+ * parameters based on the input flavor (which must be a pseudoflavor)
+ */
+static struct rpc_auth *
+gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
+{
+ struct gss_auth *gss_auth;
+ struct rpc_auth * auth;
+
+ dprintk("RPC: creating GSS authenticator for client %p\n",clnt);
+
+ if (!try_module_get(THIS_MODULE))
+ return NULL;
+ if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL)))
+ goto out_dec;
+ gss_auth->client = clnt;
+ gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor);
+ if (!gss_auth->mech) {
+ printk(KERN_WARNING "%s: Pseudoflavor %d not found!",
+ __FUNCTION__, flavor);
+ goto err_free;
+ }
+ gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor);
+ /* FIXME: Will go away once privacy support is merged in */
+ if (gss_auth->service == RPC_GSS_SVC_PRIVACY)
+ gss_auth->service = RPC_GSS_SVC_INTEGRITY;
+ INIT_LIST_HEAD(&gss_auth->upcalls);
+ spin_lock_init(&gss_auth->lock);
+ auth = &gss_auth->rpc_auth;
+ auth->au_cslack = GSS_CRED_SLACK >> 2;
+ auth->au_rslack = GSS_VERF_SLACK >> 2;
+ auth->au_ops = &authgss_ops;
+ auth->au_flavor = flavor;
+ atomic_set(&auth->au_count, 1);
+
+ if (rpcauth_init_credcache(auth, GSS_CRED_EXPIRE) < 0)
+ goto err_put_mech;
+
+ snprintf(gss_auth->path, sizeof(gss_auth->path), "%s/%s",
+ clnt->cl_pathname,
+ gss_auth->mech->gm_name);
+ gss_auth->dentry = rpc_mkpipe(gss_auth->path, clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN);
+ if (IS_ERR(gss_auth->dentry))
+ goto err_put_mech;
+
+ return auth;
+err_put_mech:
+ gss_mech_put(gss_auth->mech);
+err_free:
+ kfree(gss_auth);
+out_dec:
+ module_put(THIS_MODULE);
+ return NULL;
+}
+
+static void
+gss_destroy(struct rpc_auth *auth)
+{
+ struct gss_auth *gss_auth;
+
+ dprintk("RPC: destroying GSS authenticator %p flavor %d\n",
+ auth, auth->au_flavor);
+
+ gss_auth = container_of(auth, struct gss_auth, rpc_auth);
+ rpc_unlink(gss_auth->path);
+ gss_mech_put(gss_auth->mech);
+
+ rpcauth_free_credcache(auth);
+ kfree(gss_auth);
+ module_put(THIS_MODULE);
+}
+
+/* gss_destroy_cred (and gss_destroy_ctx) are used to clean up after failure
+ * to create a new cred or context, so they check that things have been
+ * allocated before freeing them. */
+static void
+gss_destroy_ctx(struct gss_cl_ctx *ctx)
+{
+ dprintk("RPC: gss_destroy_ctx\n");
+
+ if (ctx->gc_gss_ctx)
+ gss_delete_sec_context(&ctx->gc_gss_ctx);
+
+ kfree(ctx->gc_wire_ctx.data);
+ kfree(ctx);
+}
+
+static void
+gss_destroy_cred(struct rpc_cred *rc)
+{
+ struct gss_cred *cred = container_of(rc, struct gss_cred, gc_base);
+
+ dprintk("RPC: gss_destroy_cred \n");
+
+ if (cred->gc_ctx)
+ gss_put_ctx(cred->gc_ctx);
+ kfree(cred);
+}
+
+/*
+ * 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)
+{
+ return rpcauth_lookup_credcache(auth, acred, taskflags);
+}
+
+static struct rpc_cred *
+gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int taskflags)
+{
+ struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
+ struct gss_cred *cred = NULL;
+ int err = -ENOMEM;
+
+ dprintk("RPC: gss_create_cred for uid %d, flavor %d\n",
+ acred->uid, auth->au_flavor);
+
+ if (!(cred = kmalloc(sizeof(*cred), GFP_KERNEL)))
+ goto out_err;
+
+ memset(cred, 0, sizeof(*cred));
+ atomic_set(&cred->gc_count, 1);
+ cred->gc_uid = acred->uid;
+ /*
+ * Note: in order to force a call to call_refresh(), we deliberately
+ * fail to flag the credential as RPCAUTH_CRED_UPTODATE.
+ */
+ cred->gc_flags = 0;
+ cred->gc_base.cr_ops = &gss_credops;
+ cred->gc_service = gss_auth->service;
+ err = gss_create_upcall(gss_auth, cred);
+ if (err < 0)
+ goto out_err;
+
+ return &cred->gc_base;
+
+out_err:
+ dprintk("RPC: gss_create_cred failed with error %d\n", err);
+ if (cred) gss_destroy_cred(&cred->gc_base);
+ return ERR_PTR(err);
+}
+
+static int
+gss_match(struct auth_cred *acred, struct rpc_cred *rc, int taskflags)
+{
+ struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
+
+ /* Don't match with creds that have expired. */
+ if (gss_cred->gc_ctx && time_after(jiffies, gss_cred->gc_ctx->gc_expiry))
+ return 0;
+ return (rc->cr_uid == acred->uid);
+}
+
+/*
+* Marshal credentials.
+* Maybe we should keep a cached credential for performance reasons.
+*/
+static u32 *
+gss_marshal(struct rpc_task *task, u32 *p)
+{
+ struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
+ gc_base);
+ struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
+ u32 *cred_len;
+ struct rpc_rqst *req = task->tk_rqstp;
+ u32 maj_stat = 0;
+ struct xdr_netobj mic;
+ struct kvec iov;
+ struct xdr_buf verf_buf;
+
+ dprintk("RPC: %4u gss_marshal\n", task->tk_pid);
+
+ *p++ = htonl(RPC_AUTH_GSS);
+ cred_len = p++;
+
+ spin_lock(&ctx->gc_seq_lock);
+ req->rq_seqno = ctx->gc_seq++;
+ spin_unlock(&ctx->gc_seq_lock);
+
+ *p++ = htonl((u32) RPC_GSS_VERSION);
+ *p++ = htonl((u32) ctx->gc_proc);
+ *p++ = htonl((u32) req->rq_seqno);
+ *p++ = htonl((u32) gss_cred->gc_service);
+ p = xdr_encode_netobj(p, &ctx->gc_wire_ctx);
+ *cred_len = htonl((p - (cred_len + 1)) << 2);
+
+ /* We compute the checksum for the verifier over the xdr-encoded bytes
+ * starting with the xid and ending at the end of the credential: */
+ iov.iov_base = req->rq_snd_buf.head[0].iov_base;
+ if (task->tk_client->cl_xprt->stream)
+ /* See clnt.c:call_header() */
+ iov.iov_base += 4;
+ iov.iov_len = (u8 *)p - (u8 *)iov.iov_base;
+ xdr_buf_from_iov(&iov, &verf_buf);
+
+ /* set verifier flavor*/
+ *p++ = htonl(RPC_AUTH_GSS);
+
+ mic.data = (u8 *)(p + 1);
+ maj_stat = gss_get_mic(ctx->gc_gss_ctx,
+ GSS_C_QOP_DEFAULT,
+ &verf_buf, &mic);
+ if (maj_stat == GSS_S_CONTEXT_EXPIRED) {
+ cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
+ } else if (maj_stat != 0) {
+ printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat);
+ goto out_put_ctx;
+ }
+ p = xdr_encode_opaque(p, NULL, mic.len);
+ gss_put_ctx(ctx);
+ return p;
+out_put_ctx:
+ gss_put_ctx(ctx);
+ return NULL;
+}
+
+/*
+* Refresh credentials. XXX - finish
+*/
+static int
+gss_refresh(struct rpc_task *task)
+{
+
+ if (!gss_cred_is_uptodate_ctx(task->tk_msg.rpc_cred))
+ return gss_refresh_upcall(task);
+ return 0;
+}
+
+static u32 *
+gss_validate(struct rpc_task *task, u32 *p)
+{
+ struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
+ gc_base);
+ struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
+ u32 seq, qop_state;
+ struct kvec iov;
+ struct xdr_buf verf_buf;
+ struct xdr_netobj mic;
+ u32 flav,len;
+ u32 maj_stat;
+
+ dprintk("RPC: %4u gss_validate\n", task->tk_pid);
+
+ flav = ntohl(*p++);
+ if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE)
+ goto out_bad;
+ if (flav != RPC_AUTH_GSS)
+ goto out_bad;
+ seq = htonl(task->tk_rqstp->rq_seqno);
+ iov.iov_base = &seq;
+ iov.iov_len = sizeof(seq);
+ xdr_buf_from_iov(&iov, &verf_buf);
+ mic.data = (u8 *)p;
+ mic.len = len;
+
+ maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic, &qop_state);
+ if (maj_stat == GSS_S_CONTEXT_EXPIRED)
+ cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
+ if (maj_stat)
+ goto out_bad;
+ switch (gss_cred->gc_service) {
+ case RPC_GSS_SVC_NONE:
+ /* verifier data, flavor, length: */
+ task->tk_auth->au_rslack = XDR_QUADLEN(len) + 2;
+ break;
+ case RPC_GSS_SVC_INTEGRITY:
+ /* verifier data, flavor, length, length, sequence number: */
+ task->tk_auth->au_rslack = XDR_QUADLEN(len) + 4;
+ break;
+ case RPC_GSS_SVC_PRIVACY:
+ goto out_bad;
+ }
+ gss_put_ctx(ctx);
+ dprintk("RPC: %4u GSS gss_validate: gss_verify_mic succeeded.\n",
+ task->tk_pid);
+ return p + XDR_QUADLEN(len);
+out_bad:
+ gss_put_ctx(ctx);
+ dprintk("RPC: %4u gss_validate failed.\n", task->tk_pid);
+ return NULL;
+}
+
+static inline int
+gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
+ kxdrproc_t encode, struct rpc_rqst *rqstp, u32 *p, void *obj)
+{
+ struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
+ struct xdr_buf integ_buf;
+ u32 *integ_len = NULL;
+ struct xdr_netobj mic;
+ u32 offset, *q;
+ struct kvec *iov;
+ u32 maj_stat = 0;
+ int status = -EIO;
+
+ integ_len = p++;
+ offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
+ *p++ = htonl(rqstp->rq_seqno);
+
+ status = encode(rqstp, p, obj);
+ if (status)
+ return status;
+
+ if (xdr_buf_subsegment(snd_buf, &integ_buf,
+ offset, snd_buf->len - offset))
+ return status;
+ *integ_len = htonl(integ_buf.len);
+
+ /* guess whether we're in the head or the tail: */
+ if (snd_buf->page_len || snd_buf->tail[0].iov_len)
+ iov = snd_buf->tail;
+ else
+ iov = snd_buf->head;
+ p = iov->iov_base + iov->iov_len;
+ mic.data = (u8 *)(p + 1);
+
+ maj_stat = gss_get_mic(ctx->gc_gss_ctx,
+ GSS_C_QOP_DEFAULT, &integ_buf, &mic);
+ status = -EIO; /* XXX? */
+ if (maj_stat == GSS_S_CONTEXT_EXPIRED)
+ cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
+ else if (maj_stat)
+ return status;
+ q = xdr_encode_opaque(p, NULL, mic.len);
+
+ offset = (u8 *)q - (u8 *)p;
+ iov->iov_len += offset;
+ snd_buf->len += offset;
+ return 0;
+}
+
+static int
+gss_wrap_req(struct rpc_task *task,
+ kxdrproc_t encode, void *rqstp, u32 *p, void *obj)
+{
+ struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
+ gc_base);
+ struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
+ int status = -EIO;
+
+ dprintk("RPC: %4u gss_wrap_req\n", task->tk_pid);
+ if (ctx->gc_proc != RPC_GSS_PROC_DATA) {
+ /* The spec seems a little ambiguous here, but I think that not
+ * wrapping context destruction requests makes the most sense.
+ */
+ status = encode(rqstp, p, obj);
+ goto out;
+ }
+ switch (gss_cred->gc_service) {
+ case RPC_GSS_SVC_NONE:
+ status = encode(rqstp, p, obj);
+ break;
+ case RPC_GSS_SVC_INTEGRITY:
+ status = gss_wrap_req_integ(cred, ctx, encode,
+ rqstp, p, obj);
+ break;
+ case RPC_GSS_SVC_PRIVACY:
+ break;
+ }
+out:
+ gss_put_ctx(ctx);
+ dprintk("RPC: %4u gss_wrap_req returning %d\n", task->tk_pid, status);
+ return status;
+}
+
+static inline int
+gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
+ struct rpc_rqst *rqstp, u32 **p)
+{
+ struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
+ struct xdr_buf integ_buf;
+ struct xdr_netobj mic;
+ u32 data_offset, mic_offset;
+ u32 integ_len;
+ u32 maj_stat;
+ int status = -EIO;
+
+ integ_len = ntohl(*(*p)++);
+ if (integ_len & 3)
+ return status;
+ data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
+ mic_offset = integ_len + data_offset;
+ if (mic_offset > rcv_buf->len)
+ return status;
+ if (ntohl(*(*p)++) != rqstp->rq_seqno)
+ return status;
+
+ if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset,
+ mic_offset - data_offset))
+ return status;
+
+ if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset))
+ return status;
+
+ maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf,
+ &mic, NULL);
+ if (maj_stat == GSS_S_CONTEXT_EXPIRED)
+ cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
+ if (maj_stat != GSS_S_COMPLETE)
+ return status;
+ return 0;
+}
+
+static int
+gss_unwrap_resp(struct rpc_task *task,
+ kxdrproc_t decode, void *rqstp, u32 *p, void *obj)
+{
+ struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
+ gc_base);
+ struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
+ int status = -EIO;
+
+ if (ctx->gc_proc != RPC_GSS_PROC_DATA)
+ goto out_decode;
+ switch (gss_cred->gc_service) {
+ case RPC_GSS_SVC_NONE:
+ break;
+ case RPC_GSS_SVC_INTEGRITY:
+ status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p);
+ if (status)
+ goto out;
+ break;
+ case RPC_GSS_SVC_PRIVACY:
+ break;
+ }
+out_decode:
+ status = decode(rqstp, p, obj);
+out:
+ gss_put_ctx(ctx);
+ dprintk("RPC: %4u gss_unwrap_resp returning %d\n", task->tk_pid,
+ status);
+ return status;
+}
+
+static struct rpc_authops authgss_ops = {
+ .owner = THIS_MODULE,
+ .au_flavor = RPC_AUTH_GSS,
+#ifdef RPC_DEBUG
+ .au_name = "RPCSEC_GSS",
+#endif
+ .create = gss_create,
+ .destroy = gss_destroy,
+ .lookup_cred = gss_lookup_cred,
+ .crcreate = gss_create_cred
+};
+
+static struct rpc_credops gss_credops = {
+ .cr_name = "AUTH_GSS",
+ .crdestroy = gss_destroy_cred,
+ .crmatch = gss_match,
+ .crmarshal = gss_marshal,
+ .crrefresh = gss_refresh,
+ .crvalidate = gss_validate,
+ .crwrap_req = gss_wrap_req,
+ .crunwrap_resp = gss_unwrap_resp,
+};
+
+static struct rpc_pipe_ops gss_upcall_ops = {
+ .upcall = gss_pipe_upcall,
+ .downcall = gss_pipe_downcall,
+ .destroy_msg = gss_pipe_destroy_msg,
+ .release_pipe = gss_pipe_release,
+};
+
+/*
+ * Initialize RPCSEC_GSS module
+ */
+static int __init init_rpcsec_gss(void)
+{
+ int err = 0;
+
+ err = rpcauth_register(&authgss_ops);
+ if (err)
+ goto out;
+ err = gss_svc_init();
+ if (err)
+ goto out_unregister;
+ return 0;
+out_unregister:
+ rpcauth_unregister(&authgss_ops);
+out:
+ return err;
+}
+
+static void __exit exit_rpcsec_gss(void)
+{
+ gss_svc_shutdown();
+ rpcauth_unregister(&authgss_ops);
+}
+
+MODULE_LICENSE("GPL");
+module_init(init_rpcsec_gss)
+module_exit(exit_rpcsec_gss)
