Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
NFS: Fix the fix to Bugzilla #11061, when IPv6 isn't defined...
SUNRPC: xprt_connect() don't abort the task if the transport isn't bound
SUNRPC: Fix an Oops due to socket not set up yet...
Bug 11061, NFS mounts dropped
NFS: Handle -ESTALE error in access()
NLM: Fix GRANT callback address comparison when IPv6 is enabled
NLM: Shrink the IPv4-only version of nlm_cmp_addr()
NFSv3: Fix posix ACL code
NFS: Fix misparsing of nfsv4 fs_locations attribute (take 2)
SUNRPC: Tighten up the task locking rules in __rpc_execute()
diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c
index 1f3b0fc..aedc47a 100644
--- a/fs/lockd/clntlock.c
+++ b/fs/lockd/clntlock.c
@@ -139,6 +139,55 @@
return 0;
}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static const struct in6_addr *nlmclnt_map_v4addr(const struct sockaddr *sap,
+ struct in6_addr *addr_mapped)
+{
+ const struct sockaddr_in *sin = (const struct sockaddr_in *)sap;
+
+ switch (sap->sa_family) {
+ case AF_INET6:
+ return &((const struct sockaddr_in6 *)sap)->sin6_addr;
+ case AF_INET:
+ ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, addr_mapped);
+ return addr_mapped;
+ }
+
+ return NULL;
+}
+
+/*
+ * If lockd is using a PF_INET6 listener, all incoming requests appear
+ * to come from AF_INET6 remotes. The address of AF_INET remotes are
+ * mapped to AF_INET6 automatically by the network layer. In case the
+ * user passed an AF_INET server address at mount time, ensure both
+ * addresses are AF_INET6 before comparing them.
+ */
+static int nlmclnt_cmp_addr(const struct nlm_host *host,
+ const struct sockaddr *sap)
+{
+ const struct in6_addr *addr1;
+ const struct in6_addr *addr2;
+ struct in6_addr addr1_mapped;
+ struct in6_addr addr2_mapped;
+
+ addr1 = nlmclnt_map_v4addr(nlm_addr(host), &addr1_mapped);
+ if (likely(addr1 != NULL)) {
+ addr2 = nlmclnt_map_v4addr(sap, &addr2_mapped);
+ if (likely(addr2 != NULL))
+ return ipv6_addr_equal(addr1, addr2);
+ }
+
+ return 0;
+}
+#else /* !(CONFIG_IPV6 || CONFIG_IPV6_MODULE) */
+static int nlmclnt_cmp_addr(const struct nlm_host *host,
+ const struct sockaddr *sap)
+{
+ return nlm_cmp_addr(nlm_addr(host), sap);
+}
+#endif /* !(CONFIG_IPV6 || CONFIG_IPV6_MODULE) */
+
/*
* The server lockd has called us back to tell us the lock was granted
*/
@@ -166,7 +215,7 @@
*/
if (fl_blocked->fl_u.nfs_fl.owner->pid != lock->svid)
continue;
- if (!nlm_cmp_addr(nlm_addr(block->b_host), addr))
+ if (!nlmclnt_cmp_addr(block->b_host, addr))
continue;
if (nfs_compare_fh(NFS_FH(fl_blocked->fl_file->f_path.dentry->d_inode) ,fh) != 0)
continue;
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 9b728f3..574158a 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -255,6 +255,32 @@
}
return 0;
}
+
+/*
+ * Test if two ip6 socket addresses refer to the same socket by
+ * comparing relevant fields. The padding bytes specifically, are not
+ * compared. sin6_flowinfo is not compared because it only affects QoS
+ * and sin6_scope_id is only compared if the address is "link local"
+ * because "link local" addresses need only be unique to a specific
+ * link. Conversely, ordinary unicast addresses might have different
+ * sin6_scope_id.
+ *
+ * The caller should ensure both socket addresses are AF_INET6.
+ */
+static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ const struct sockaddr_in6 *saddr1 = (const struct sockaddr_in6 *)sa1;
+ const struct sockaddr_in6 *saddr2 = (const struct sockaddr_in6 *)sa2;
+
+ if (!ipv6_addr_equal(&saddr1->sin6_addr,
+ &saddr1->sin6_addr))
+ return 0;
+ if (ipv6_addr_scope(&saddr1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL &&
+ saddr1->sin6_scope_id != saddr2->sin6_scope_id)
+ return 0;
+ return saddr1->sin6_port == saddr2->sin6_port;
+}
#else
static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1,
const struct sockaddr_in *sa2)
@@ -270,9 +296,52 @@
return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1,
(const struct sockaddr_in *)sa2);
}
+
+static int nfs_sockaddr_cmp_ip6(const struct sockaddr * sa1,
+ const struct sockaddr * sa2)
+{
+ return 0;
+}
#endif
/*
+ * Test if two ip4 socket addresses refer to the same socket, by
+ * comparing relevant fields. The padding bytes specifically, are
+ * not compared.
+ *
+ * The caller should ensure both socket addresses are AF_INET.
+ */
+static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ const struct sockaddr_in *saddr1 = (const struct sockaddr_in *)sa1;
+ const struct sockaddr_in *saddr2 = (const struct sockaddr_in *)sa2;
+
+ if (saddr1->sin_addr.s_addr != saddr2->sin_addr.s_addr)
+ return 0;
+ return saddr1->sin_port == saddr2->sin_port;
+}
+
+/*
+ * Test if two socket addresses represent the same actual socket,
+ * by comparing (only) relevant fields.
+ */
+static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ if (sa1->sa_family != sa2->sa_family)
+ return 0;
+
+ switch (sa1->sa_family) {
+ case AF_INET:
+ return nfs_sockaddr_cmp_ip4(sa1, sa2);
+ case AF_INET6:
+ return nfs_sockaddr_cmp_ip6(sa1, sa2);
+ }
+ return 0;
+}
+
+/*
* Find a client by IP address and protocol version
* - returns NULL if no such client
*/
@@ -344,8 +413,10 @@
static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
{
struct nfs_client *clp;
+ const struct sockaddr *sap = data->addr;
list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
+ const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
/* Don't match clients that failed to initialise properly */
if (clp->cl_cons_state < 0)
continue;
@@ -358,7 +429,7 @@
continue;
/* Match the full socket address */
- if (memcmp(&clp->cl_addr, data->addr, sizeof(clp->cl_addr)) != 0)
+ if (!nfs_sockaddr_cmp(sap, clap))
continue;
atomic_inc(&clp->cl_count);
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index e35c819..672368f 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1892,8 +1892,14 @@
cache.cred = cred;
cache.jiffies = jiffies;
status = NFS_PROTO(inode)->access(inode, &cache);
- if (status != 0)
+ if (status != 0) {
+ if (status == -ESTALE) {
+ nfs_zap_caches(inode);
+ if (!S_ISDIR(inode->i_mode))
+ set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
+ }
return status;
+ }
nfs_access_add_cache(inode, &cache);
out:
if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index cef6255..6bbf0e6 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -292,7 +292,7 @@
{
struct nfs_server *server = NFS_SERVER(inode);
struct nfs_fattr fattr;
- struct page *pages[NFSACL_MAXPAGES] = { };
+ struct page *pages[NFSACL_MAXPAGES];
struct nfs3_setaclargs args = {
.inode = inode,
.mask = NFS_ACL,
@@ -303,7 +303,7 @@
.rpc_argp = &args,
.rpc_resp = &fattr,
};
- int status, count;
+ int status;
status = -EOPNOTSUPP;
if (!nfs_server_capable(inode, NFS_CAP_ACLS))
@@ -319,6 +319,20 @@
if (S_ISDIR(inode->i_mode)) {
args.mask |= NFS_DFACL;
args.acl_default = dfacl;
+ args.len = nfsacl_size(acl, dfacl);
+ } else
+ args.len = nfsacl_size(acl, NULL);
+
+ if (args.len > NFS_ACL_INLINE_BUFSIZE) {
+ unsigned int npages = 1 + ((args.len - 1) >> PAGE_SHIFT);
+
+ status = -ENOMEM;
+ do {
+ args.pages[args.npages] = alloc_page(GFP_KERNEL);
+ if (args.pages[args.npages] == NULL)
+ goto out_freepages;
+ args.npages++;
+ } while (args.npages < npages);
}
dprintk("NFS call setacl\n");
@@ -329,10 +343,6 @@
nfs_zap_acl_cache(inode);
dprintk("NFS reply setacl: %d\n", status);
- /* pages may have been allocated at the xdr layer. */
- for (count = 0; count < NFSACL_MAXPAGES && args.pages[count]; count++)
- __free_page(args.pages[count]);
-
switch (status) {
case 0:
status = nfs_refresh_inode(inode, &fattr);
@@ -346,6 +356,11 @@
case -ENOTSUPP:
status = -EOPNOTSUPP;
}
+out_freepages:
+ while (args.npages != 0) {
+ args.npages--;
+ __free_page(args.pages[args.npages]);
+ }
out:
return status;
}
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index 11cddde..6cdeacf 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -82,8 +82,10 @@
#define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2)
#define ACL3_getaclargs_sz (NFS3_fh_sz+1)
-#define ACL3_setaclargs_sz (NFS3_fh_sz+1+2*(2+5*3))
-#define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+2*(2+5*3))
+#define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \
+ XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
+#define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \
+ XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
#define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz)
/*
@@ -703,28 +705,18 @@
struct nfs3_setaclargs *args)
{
struct xdr_buf *buf = &req->rq_snd_buf;
- unsigned int base, len_in_head, len = nfsacl_size(
- (args->mask & NFS_ACL) ? args->acl_access : NULL,
- (args->mask & NFS_DFACL) ? args->acl_default : NULL);
- int count, err;
+ unsigned int base;
+ int err;
p = xdr_encode_fhandle(p, NFS_FH(args->inode));
*p++ = htonl(args->mask);
- base = (char *)p - (char *)buf->head->iov_base;
- /* put as much of the acls into head as possible. */
- len_in_head = min_t(unsigned int, buf->head->iov_len - base, len);
- len -= len_in_head;
- req->rq_slen = xdr_adjust_iovec(req->rq_svec, p + (len_in_head >> 2));
+ req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+ base = req->rq_slen;
- for (count = 0; (count << PAGE_SHIFT) < len; count++) {
- args->pages[count] = alloc_page(GFP_KERNEL);
- if (!args->pages[count]) {
- while (count)
- __free_page(args->pages[--count]);
- return -ENOMEM;
- }
- }
- xdr_encode_pages(buf, args->pages, 0, len);
+ if (args->npages != 0)
+ xdr_encode_pages(buf, args->pages, 0, args->len);
+ else
+ req->rq_slen += args->len;
err = nfsacl_encode(buf, base, args->inode,
(args->mask & NFS_ACL) ?
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 30befc3..2a2a0a7 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -21,7 +21,9 @@
#define NFSDBG_FACILITY NFSDBG_VFS
/*
- * Check if fs_root is valid
+ * Convert the NFSv4 pathname components into a standard posix path.
+ *
+ * Note that the resulting string will be placed at the end of the buffer
*/
static inline char *nfs4_pathname_string(const struct nfs4_pathname *pathname,
char *buffer, ssize_t buflen)
@@ -99,21 +101,20 @@
{
struct vfsmount *mnt = ERR_PTR(-ENOENT);
char *mnt_path;
- int page2len;
+ unsigned int maxbuflen;
unsigned int s;
mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE);
if (IS_ERR(mnt_path))
return mnt;
mountdata->mnt_path = mnt_path;
- page2 += strlen(mnt_path) + 1;
- page2len = PAGE_SIZE - strlen(mnt_path) - 1;
+ maxbuflen = mnt_path - 1 - page2;
for (s = 0; s < location->nservers; s++) {
const struct nfs4_string *buf = &location->servers[s];
struct sockaddr_storage addr;
- if (buf->len <= 0 || buf->len >= PAGE_SIZE)
+ if (buf->len <= 0 || buf->len >= maxbuflen)
continue;
mountdata->addr = (struct sockaddr *)&addr;
@@ -126,8 +127,8 @@
continue;
nfs_set_port(mountdata->addr, NFS_PORT);
- strncpy(page2, buf->data, page2len);
- page2[page2len] = '\0';
+ memcpy(page2, buf->data, buf->len);
+ page2[buf->len] = '\0';
mountdata->hostname = page2;
snprintf(page, PAGE_SIZE, "%s:%s",
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index aa6fe70..51855df 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -346,6 +346,7 @@
return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static inline int __nlm_cmp_addr6(const struct sockaddr *sap1,
const struct sockaddr *sap2)
{
@@ -353,6 +354,13 @@
const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sap2;
return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr);
}
+#else /* !(CONFIG_IPV6 || CONFIG_IPV6_MODULE) */
+static inline int __nlm_cmp_addr6(const struct sockaddr *sap1,
+ const struct sockaddr *sap2)
+{
+ return 0;
+}
+#endif /* !(CONFIG_IPV6 || CONFIG_IPV6_MODULE) */
/*
* Compare two host addresses
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index a550b52..2e5f000 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -406,6 +406,8 @@
int mask;
struct posix_acl * acl_access;
struct posix_acl * acl_default;
+ size_t len;
+ unsigned int npages;
struct page ** pages;
};
diff --git a/include/linux/nfsacl.h b/include/linux/nfsacl.h
index 54487a9..43011b6 100644
--- a/include/linux/nfsacl.h
+++ b/include/linux/nfsacl.h
@@ -37,6 +37,9 @@
#define NFSACL_MAXPAGES ((2*(8+12*NFS_ACL_MAX_ENTRIES) + PAGE_SIZE-1) \
>> PAGE_SHIFT)
+#define NFS_ACL_MAX_ENTRIES_INLINE (5)
+#define NFS_ACL_INLINE_BUFSIZE ((2*(2+3*NFS_ACL_MAX_ENTRIES_INLINE)) << 2)
+
static inline unsigned int
nfsacl_size(struct posix_acl *acl_access, struct posix_acl *acl_default)
{
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 385f427..ff50a05 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -293,11 +293,6 @@
rpc_clear_queued(task);
if (rpc_test_and_set_running(task))
return;
- /* We might have raced */
- if (RPC_IS_QUEUED(task)) {
- rpc_clear_running(task);
- return;
- }
if (RPC_IS_ASYNC(task)) {
int status;
@@ -607,7 +602,9 @@
*/
static void __rpc_execute(struct rpc_task *task)
{
- int status = 0;
+ struct rpc_wait_queue *queue;
+ int task_is_async = RPC_IS_ASYNC(task);
+ int status = 0;
dprintk("RPC: %5u __rpc_execute flags=0x%x\n",
task->tk_pid, task->tk_flags);
@@ -647,15 +644,25 @@
*/
if (!RPC_IS_QUEUED(task))
continue;
- rpc_clear_running(task);
- if (RPC_IS_ASYNC(task)) {
- /* Careful! we may have raced... */
- if (RPC_IS_QUEUED(task))
- return;
- if (rpc_test_and_set_running(task))
- return;
+ /*
+ * The queue->lock protects against races with
+ * rpc_make_runnable().
+ *
+ * Note that once we clear RPC_TASK_RUNNING on an asynchronous
+ * rpc_task, rpc_make_runnable() can assign it to a
+ * different workqueue. We therefore cannot assume that the
+ * rpc_task pointer may still be dereferenced.
+ */
+ queue = task->tk_waitqueue;
+ spin_lock_bh(&queue->lock);
+ if (!RPC_IS_QUEUED(task)) {
+ spin_unlock_bh(&queue->lock);
continue;
}
+ rpc_clear_running(task);
+ spin_unlock_bh(&queue->lock);
+ if (task_is_async)
+ return;
/* sync task: sleep here */
dprintk("RPC: %5u sync task going to sleep\n", task->tk_pid);
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 29e401b..62098d1 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -663,7 +663,7 @@
xprt, (xprt_connected(xprt) ? "is" : "is not"));
if (!xprt_bound(xprt)) {
- task->tk_status = -EIO;
+ task->tk_status = -EAGAIN;
return;
}
if (!xprt_lock_write(xprt, task))
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 5cbb404..29c71e6 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -467,7 +467,7 @@
int err, sent = 0;
if (unlikely(!sock))
- return -ENOTCONN;
+ return -ENOTSOCK;
clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags);
if (base != 0) {
@@ -577,6 +577,8 @@
req->rq_svec->iov_base,
req->rq_svec->iov_len);
+ if (!xprt_bound(xprt))
+ return -ENOTCONN;
status = xs_sendpages(transport->sock,
xs_addr(xprt),
xprt->addrlen, xdr,
@@ -594,6 +596,10 @@
}
switch (status) {
+ case -ENOTSOCK:
+ status = -ENOTCONN;
+ /* Should we call xs_close() here? */
+ break;
case -EAGAIN:
xs_nospace(task);
break;
@@ -693,6 +699,10 @@
}
switch (status) {
+ case -ENOTSOCK:
+ status = -ENOTCONN;
+ /* Should we call xs_close() here? */
+ break;
case -EAGAIN:
xs_nospace(task);
break;
@@ -1523,7 +1533,7 @@
struct socket *sock = transport->sock;
int err, status = -EIO;
- if (xprt->shutdown || !xprt_bound(xprt))
+ if (xprt->shutdown)
goto out;
/* Start by resetting any existing state */
@@ -1564,7 +1574,7 @@
struct socket *sock = transport->sock;
int err, status = -EIO;
- if (xprt->shutdown || !xprt_bound(xprt))
+ if (xprt->shutdown)
goto out;
/* Start by resetting any existing state */
@@ -1648,6 +1658,9 @@
write_unlock_bh(&sk->sk_callback_lock);
}
+ if (!xprt_bound(xprt))
+ return -ENOTCONN;
+
/* Tell the socket layer to start connecting... */
xprt->stat.connect_count++;
xprt->stat.connect_start = jiffies;
@@ -1668,7 +1681,7 @@
struct socket *sock = transport->sock;
int err, status = -EIO;
- if (xprt->shutdown || !xprt_bound(xprt))
+ if (xprt->shutdown)
goto out;
if (!sock) {
@@ -1728,7 +1741,7 @@
struct socket *sock = transport->sock;
int err, status = -EIO;
- if (xprt->shutdown || !xprt_bound(xprt))
+ if (xprt->shutdown)
goto out;
if (!sock) {
