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Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6

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* '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()
This commit is contained in:
Linus Torvalds 2009-03-14 12:00:18 -07:00
commit f1823acfbc
12 changed files with 222 additions and 55 deletions
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51
fs/lockd/clntlock.c
View File

@ -139,6 +139,55 @@ int nlmclnt_block(struct nlm_wait *block, struct nlm_rqst *req, long timeout)
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 @@ __be32 nlmclnt_grant(const struct sockaddr *addr, const struct nlm_lock *lock)
*/
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;

73
fs/nfs/client.c
View File

@ -255,6 +255,32 @@ static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
}
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)
@ -270,8 +296,51 @@ static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
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 @@ struct nfs_client *nfs_find_client_next(struct nfs_client *clp)
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 @@ static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *dat
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);

8
fs/nfs/dir.c
View File

@ -1892,8 +1892,14 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask)
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)

27
fs/nfs/nfs3acl.c
View File

@ -292,7 +292,7 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
{
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 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
.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 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
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 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
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 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
case -ENOTSUPP:
status = -EOPNOTSUPP;
}
out_freepages:
while (args.npages != 0) {
args.npages--;
__free_page(args.pages[args.npages]);
}
out:
return status;
}

32
fs/nfs/nfs3xdr.c
View File

@ -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 @@ nfs3_xdr_setaclargs(struct rpc_rqst *req, __be32 *p,
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) ?

15
fs/nfs/nfs4namespace.c
View File

@ -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 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
{
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 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
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",

8
include/linux/lockd/lockd.h
View File

@ -346,6 +346,7 @@ static inline int __nlm_cmp_addr4(const struct sockaddr *sap1,
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 @@ static inline int __nlm_cmp_addr6(const struct sockaddr *sap1,
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

2
include/linux/nfs_xdr.h
View File

@ -406,6 +406,8 @@ struct nfs3_setaclargs {
int mask;
struct posix_acl * acl_access;
struct posix_acl * acl_default;
size_t len;
unsigned int npages;
struct page ** pages;
};

3
include/linux/nfsacl.h
View File

@ -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)
{

33
net/sunrpc/sched.c
View File

@ -293,11 +293,6 @@ static void rpc_make_runnable(struct rpc_task *task)
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 @@ void rpc_release_calldata(const struct rpc_call_ops *ops, void *calldata)
*/
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 @@ static void __rpc_execute(struct rpc_task *task)
*/
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);

2
net/sunrpc/xprt.c
View File

@ -663,7 +663,7 @@ void xprt_connect(struct rpc_task *task)
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))

23
net/sunrpc/xprtsock.c
View File

@ -467,7 +467,7 @@ static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen,
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 @@ static int xs_udp_send_request(struct rpc_task *task)
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 @@ static int xs_udp_send_request(struct rpc_task *task)
}
switch (status) {
case -ENOTSOCK:
status = -ENOTCONN;
/* Should we call xs_close() here? */
break;
case -EAGAIN:
xs_nospace(task);
break;
@ -693,6 +699,10 @@ static int xs_tcp_send_request(struct rpc_task *task)
}
switch (status) {
case -ENOTSOCK:
status = -ENOTCONN;
/* Should we call xs_close() here? */
break;
case -EAGAIN:
xs_nospace(task);
break;
@ -1523,7 +1533,7 @@ static void xs_udp_connect_worker4(struct work_struct *work)
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 @@ static void xs_udp_connect_worker6(struct work_struct *work)
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 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
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 @@ static void xs_tcp_connect_worker4(struct work_struct *work)
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 @@ static void xs_tcp_connect_worker6(struct work_struct *work)
struct socket *sock = transport->sock;
int err, status = -EIO;
if (xprt->shutdown || !xprt_bound(xprt))
if (xprt->shutdown)
goto out;
if (!sock) {