Handle ipv6 remote addresses from GETDEVICEINFO
- supports netid "tcp" for ipv4 and "tcp6" for ipv6 as rfc 5665 specifies
- added ds_remotestr to avoid having to handle different AFs in every dprintk
- tested against pynfs 4.1 server, submitting ipv6 support patch to pynfs
- tested with IPv6 disabled, it compiles cleanly and relies on rpc_pton to
refuse to accept IPv6 addresses
Signed-off-by: Weston Andros Adamson <dros@xxxxxxxxxx>
---
fs/nfs/nfs4filelayout.c | 7 +-
fs/nfs/nfs4filelayout.h | 5 +-
fs/nfs/nfs4filelayoutdev.c | 255 ++++++++++++++++++++++++++++++++------------
3 files changed, 191 insertions(+), 76 deletions(-)
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index be79dc9..583adb3 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -343,8 +343,7 @@ filelayout_read_pagelist(struct nfs_read_data *data)
set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags);
return PNFS_NOT_ATTEMPTED;
}
- dprintk("%s USE DS:ip %x %hu\n", __func__,
- ntohl(ds->ds_ip_addr), ntohs(ds->ds_port));
+ dprintk("%s USE DS: %s\n", __func__, ds->ds_remotestr);
/* No multipath support. Use first DS */
data->ds_clp = ds->ds_clp;
@@ -383,9 +382,9 @@ filelayout_write_pagelist(struct nfs_write_data *data, int sync)
set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags);
return PNFS_NOT_ATTEMPTED;
}
- dprintk("%s ino %lu sync %d req %Zu@%llu DS:%x:%hu\n", __func__,
+ dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s\n", __func__,
data->inode->i_ino, sync, (size_t) data->args.count, offset,
- ntohl(ds->ds_ip_addr), ntohs(ds->ds_port));
+ ds->ds_remotestr);
data->write_done_cb = filelayout_write_done_cb;
data->ds_clp = ds->ds_clp;
diff --git a/fs/nfs/nfs4filelayout.h b/fs/nfs/nfs4filelayout.h
index 2b461d7..1dfd7eb 100644
--- a/fs/nfs/nfs4filelayout.h
+++ b/fs/nfs/nfs4filelayout.h
@@ -49,8 +49,9 @@ enum stripetype4 {
/* Individual ip address */
struct nfs4_pnfs_ds {
struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
- u32 ds_ip_addr;
- u32 ds_port;
+ struct sockaddr_storage ds_addr;
+ size_t ds_addrlen;
+ char *ds_remotestr; /* human readable addr+port */
struct nfs_client *ds_clp;
atomic_t ds_count;
};
diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c
index db07c7a..49a7bb3 100644
--- a/fs/nfs/nfs4filelayoutdev.c
+++ b/fs/nfs/nfs4filelayoutdev.c
@@ -80,11 +80,11 @@ print_ds(struct nfs4_pnfs_ds *ds)
printk("%s NULL device\n", __func__);
return;
}
- printk(" ip_addr %x port %hu\n"
+ printk(" ds %s\n"
" ref count %d\n"
" client %p\n"
" cl_exchange_flags %x\n",
- ntohl(ds->ds_ip_addr), ntohs(ds->ds_port),
+ ds->ds_remotestr,
atomic_read(&ds->ds_count), ds->ds_clp,
ds->ds_clp ? ds->ds_clp->cl_exchange_flags : 0);
}
@@ -112,17 +112,45 @@ void print_deviceid(struct nfs4_deviceid *id)
/* nfs4_ds_cache_lock is held */
static struct nfs4_pnfs_ds *
-_data_server_lookup_locked(u32 ip_addr, u32 port)
+_data_server_lookup_locked(struct sockaddr *addr, size_t addrlen)
{
struct nfs4_pnfs_ds *ds;
-
- dprintk("_data_server_lookup: ip_addr=%x port=%hu\n",
- ntohl(ip_addr), ntohs(port));
+ struct sockaddr_in *a, *b;
+ struct sockaddr_in6 *a6, *b6;
list_for_each_entry(ds, &nfs4_data_server_cache, ds_node) {
- if (ds->ds_ip_addr == ip_addr &&
- ds->ds_port == port) {
- return ds;
+ if (addr->sa_family != ds->ds_addr.ss_family)
+ continue;
+
+ switch (addr->sa_family) {
+ case AF_INET:
+ a = (struct sockaddr_in *)addr;
+ b = (struct sockaddr_in *)&ds->ds_addr;
+
+ if (a->sin_addr.s_addr == b->sin_addr.s_addr &&
+ a->sin_port == b->sin_port)
+ return ds;
+ break;
+
+ case AF_INET6:
+ a6 = (struct sockaddr_in6 *)addr;
+ b6 = (struct sockaddr_in6 *)&ds->ds_addr;
+
+ /* LINKLOCAL addresses must have matching scope_id */
+ if (ipv6_addr_scope(&a6->sin6_addr) ==
+ IPV6_ADDR_SCOPE_LINKLOCAL &&
+ a6->sin6_scope_id != b6->sin6_scope_id)
+ continue;
+
+ if (ipv6_addr_equal(&a6->sin6_addr, &b6->sin6_addr) &&
+ a6->sin6_port == b6->sin6_port)
+ return ds;
+ break;
+
+ default:
+ dprintk("%s: unhandled address family: %u\n",
+ __func__, addr->sa_family);
+ return NULL;
}
}
return NULL;
@@ -136,19 +164,14 @@ static int
nfs4_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds)
{
struct nfs_client *clp;
- struct sockaddr_in sin;
int status = 0;
- dprintk("--> %s ip:port %x:%hu au_flavor %d\n", __func__,
- ntohl(ds->ds_ip_addr), ntohs(ds->ds_port),
+ dprintk("--> %s addr %s au_flavor %d\n", __func__, ds->ds_remotestr,
mds_srv->nfs_client->cl_rpcclient->cl_auth->au_flavor);
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = ds->ds_ip_addr;
- sin.sin_port = ds->ds_port;
-
- clp = nfs4_set_ds_client(mds_srv->nfs_client, (struct sockaddr *)&sin,
- sizeof(sin), IPPROTO_TCP);
+ clp = nfs4_set_ds_client(mds_srv->nfs_client,
+ (struct sockaddr *)&ds->ds_addr,
+ ds->ds_addrlen, IPPROTO_TCP);
if (IS_ERR(clp)) {
status = PTR_ERR(clp);
goto out;
@@ -160,8 +183,8 @@ nfs4_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds)
goto out_put;
}
ds->ds_clp = clp;
- dprintk("%s [existing] ip=%x, port=%hu\n", __func__,
- ntohl(ds->ds_ip_addr), ntohs(ds->ds_port));
+ dprintk("%s [existing] server=%s\n", __func__,
+ ds->ds_remotestr);
goto out;
}
@@ -180,8 +203,7 @@ nfs4_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds)
goto out_put;
ds->ds_clp = clp;
- dprintk("%s [new] ip=%x, port=%hu\n", __func__, ntohl(ds->ds_ip_addr),
- ntohs(ds->ds_port));
+ dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr);
out:
return status;
out_put:
@@ -198,6 +220,7 @@ destroy_ds(struct nfs4_pnfs_ds *ds)
if (ds->ds_clp)
nfs_put_client(ds->ds_clp);
+ kfree(ds->ds_remotestr);
kfree(ds);
}
@@ -224,31 +247,85 @@ nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr)
kfree(dsaddr);
}
+/*
+ * Create a string with a human readable address and port to avoid
+ * complicated setup around many dprinks.
+ */
+static char *
+nfs4_pnfs_remotestr(struct sockaddr *ds_addr, gfp_t gfp_flags)
+{
+ char buf[INET6_ADDRSTRLEN + IPV6_SCOPE_ID_LEN];
+ char *remotestr;
+ char *startsep = "";
+ char *endsep = "";
+ size_t len;
+ uint16_t port;
+
+ switch (ds_addr->sa_family) {
+ case AF_INET:
+ port = ((struct sockaddr_in *)ds_addr)->sin_port;
+ break;
+ case AF_INET6:
+ startsep = "[";
+ endsep = "]";
+ port = ((struct sockaddr_in6 *)ds_addr)->sin6_port;
+ break;
+ default:
+ dprintk("%s: Unknown address family %u\n",
+ __func__, ds_addr->sa_family);
+ return NULL;
+ }
+
+ if (!rpc_ntop((struct sockaddr *)ds_addr, buf, sizeof(buf))) {
+ dprintk("%s: error printing addr\n", __func__);
+ return NULL;
+ }
+
+ len = strlen(buf) + strlen(startsep) + strlen(endsep) + 1 + 5 + 1;
+ remotestr = kzalloc(len, gfp_flags);
+
+ if (unlikely(!remotestr)) {
+ dprintk("%s: couldn't alloc remotestr\n", __func__);
+ return NULL;
+ }
+
+ snprintf(remotestr, len, "%s%s%s:%u",
+ startsep, buf, endsep, ntohs(port));
+
+ return remotestr;
+}
+
static struct nfs4_pnfs_ds *
-nfs4_pnfs_ds_add(struct inode *inode, u32 ip_addr, u32 port, gfp_t gfp_flags)
+nfs4_pnfs_ds_add(struct sockaddr *addr, size_t addrlen, gfp_t gfp_flags)
{
- struct nfs4_pnfs_ds *tmp_ds, *ds;
+ struct nfs4_pnfs_ds *tmp_ds, *ds = NULL;
+ char *remotestr;
ds = kzalloc(sizeof(*tmp_ds), gfp_flags);
if (!ds)
goto out;
+ /* this is only used for debugging, so it's ok if its NULL */
+ remotestr = nfs4_pnfs_remotestr(addr, gfp_flags);
+
spin_lock(&nfs4_ds_cache_lock);
- tmp_ds = _data_server_lookup_locked(ip_addr, port);
+ tmp_ds = _data_server_lookup_locked(addr, addrlen);
if (tmp_ds == NULL) {
- ds->ds_ip_addr = ip_addr;
- ds->ds_port = port;
+ memcpy(&ds->ds_addr, addr, addrlen);
+ ds->ds_addrlen = addrlen;
+ ds->ds_remotestr = remotestr;
atomic_set(&ds->ds_count, 1);
INIT_LIST_HEAD(&ds->ds_node);
ds->ds_clp = NULL;
list_add(&ds->ds_node, &nfs4_data_server_cache);
- dprintk("%s add new data server ip 0x%x\n", __func__,
- ds->ds_ip_addr);
+ dprintk("%s add new data server %s\n", __func__,
+ ds->ds_remotestr);
} else {
+ kfree(remotestr);
kfree(ds);
atomic_inc(&tmp_ds->ds_count);
- dprintk("%s data server found ip 0x%x, inc'ed ds_count to %d\n",
- __func__, tmp_ds->ds_ip_addr,
+ dprintk("%s data server %s found, inc'ed ds_count to %d\n",
+ __func__, ds->ds_remotestr,
atomic_read(&tmp_ds->ds_count));
ds = tmp_ds;
}
@@ -258,18 +335,21 @@ out:
}
/*
- * Currently only support ipv4, and one multi-path address.
+ * Currently only supports ipv4, ipv6 and one multi-path address.
*/
static struct nfs4_pnfs_ds *
decode_and_add_ds(struct xdr_stream *streamp, struct inode *inode, gfp_t gfp_flags)
{
struct nfs4_pnfs_ds *ds = NULL;
- char *buf;
- const char *ipend, *pstr;
- u32 ip_addr, port;
- int nlen, rlen, i;
+ char *buf, *portstr;
+ struct sockaddr_storage ss;
+ size_t sslen;
+ u32 port;
+ int nlen, rlen;
int tmp[2];
__be32 *p;
+ char *netid, *match_netid;
+ size_t match_netid_len;
/* r_netid */
p = xdr_inline_decode(streamp, 4);
@@ -281,62 +361,97 @@ decode_and_add_ds(struct xdr_stream *streamp, struct inode *inode, gfp_t gfp_fla
if (unlikely(!p))
goto out_err;
- /* Check that netid is "tcp" */
- if (nlen != 3 || memcmp((char *)p, "tcp", 3)) {
- dprintk("%s: ERROR: non ipv4 TCP r_netid\n", __func__);
+ netid = kmalloc(nlen+1, gfp_flags);
+ if (unlikely(!netid))
goto out_err;
- }
- /* r_addr */
+ netid[nlen] = '\0';
+ memcpy(netid, p, nlen);
+
+ /* r_addr: ip/ip6addr with port in dec octets - see RFC 5665 */
p = xdr_inline_decode(streamp, 4);
if (unlikely(!p))
- goto out_err;
+ goto out_free_netid;
rlen = be32_to_cpup(p);
p = xdr_inline_decode(streamp, rlen);
if (unlikely(!p))
- goto out_err;
+ goto out_free_netid;
- /* ipv6 length plus port is legal */
- if (rlen > INET6_ADDRSTRLEN + 8) {
+ /* port is ".ABC.DEF", 8 chars max */
+ if (rlen > INET6_ADDRSTRLEN + IPV6_SCOPE_ID_LEN + 8) {
dprintk("%s: Invalid address, length %d\n", __func__,
rlen);
- goto out_err;
+ goto out_free_netid;
}
buf = kmalloc(rlen + 1, gfp_flags);
if (!buf) {
dprintk("%s: Not enough memory\n", __func__);
- goto out_err;
+ goto out_free_netid;
}
buf[rlen] = '\0';
memcpy(buf, p, rlen);
- /* replace the port dots with dashes for the in4_pton() delimiter*/
- for (i = 0; i < 2; i++) {
- char *res = strrchr(buf, '.');
- if (!res) {
- dprintk("%s: Failed finding expected dots in port\n",
- __func__);
- goto out_free;
- }
- *res = '-';
+ /* replace port '.' with '-' */
+ portstr = strrchr(buf, '.');
+ if (!portstr) {
+ dprintk("%s: Failed finding expected dot in port\n",
+ __func__);
+ goto out_free_buf;
+ }
+ *portstr = '-';
+
+ /* find '.' between address and port */
+ portstr = strrchr(buf, '.');
+ if (!portstr) {
+ dprintk("%s: Failed finding expected dot between address and "
+ "port\n", __func__);
+ goto out_free_buf;
}
+ *portstr = '\0';
- /* Currently only support ipv4 address */
- if (in4_pton(buf, rlen, (u8 *)&ip_addr, '-', &ipend) == 0) {
- dprintk("%s: Only ipv4 addresses supported\n", __func__);
- goto out_free;
+ if (!rpc_pton(buf, portstr-buf, (struct sockaddr *)&ss, sizeof(ss))) {
+ dprintk("%s: Error parsing address %s\n", __func__, buf);
+ goto out_free_buf;
}
- /* port */
- pstr = ipend;
- sscanf(pstr, "-%d-%d", &tmp[0], &tmp[1]);
+ portstr++;
+ sscanf(portstr, "%d-%d", &tmp[0], &tmp[1]);
port = htons((tmp[0] << 8) | (tmp[1]));
- ds = nfs4_pnfs_ds_add(inode, ip_addr, port, gfp_flags);
- dprintk("%s: Decoded address and port %s\n", __func__, buf);
-out_free:
+ switch (ss.ss_family) {
+ case AF_INET:
+ ((struct sockaddr_in *)&ss)->sin_port = port;
+ sslen = sizeof(struct sockaddr_in);
+ match_netid = "tcp";
+ match_netid_len = 3;
+ break;
+
+ case AF_INET6:
+ ((struct sockaddr_in6 *)&ss)->sin6_port = port;
+ sslen = sizeof(struct sockaddr_in6);
+ match_netid = "tcp6";
+ match_netid_len = 4;
+ break;
+
+ default:
+ dprintk("%s: unsupported address family: %u\n",
+ __func__, ss.ss_family);
+ goto out_free_buf;
+ }
+
+ if (nlen != match_netid_len || strncmp(netid, match_netid, nlen)) {
+ dprintk("%s: ERROR: r_netid \"%s\" != \"%s\"\n",
+ __func__, netid, match_netid);
+ goto out_free_buf;
+ }
+
+ ds = nfs4_pnfs_ds_add((struct sockaddr *)&ss, sslen, gfp_flags);
+ dprintk("%s: Added DS %s\n", __func__, ds->ds_remotestr);
+out_free_buf:
kfree(buf);
+out_free_netid:
+ kfree(netid);
out_err:
return ds;
}
@@ -674,13 +789,13 @@ nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j)
static void
filelayout_mark_devid_negative(struct nfs4_file_layout_dsaddr *dsaddr,
- int err, u32 ds_addr)
+ int err, const char *ds_remotestr)
{
u32 *p = (u32 *)&dsaddr->deviceid;
- printk(KERN_ERR "NFS: data server %x connection error %d."
+ printk(KERN_ERR "NFS: data server %s connection error %d."
" Deviceid [%x%x%x%x] marked out of use.\n",
- ds_addr, err, p[0], p[1], p[2], p[3]);
+ ds_remotestr, err, p[0], p[1], p[2], p[3]);
spin_lock(&filelayout_deviceid_lock);
dsaddr->flags |= NFS4_DEVICE_ID_NEG_ENTRY;
@@ -711,7 +826,7 @@ nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx)
err = nfs4_ds_connect(s, ds);
if (err) {
filelayout_mark_devid_negative(dsaddr, err,
- ntohl(ds->ds_ip_addr));
+ ds->ds_remotestr);
return NULL;
}
}
--
1.7.4.2
--
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