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Diffstat (limited to 'fs/nfs/super.c')
-rw-r--r--fs/nfs/super.c878
1 files changed, 606 insertions, 272 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 614efeed5437..47cf83e917be 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -47,6 +47,7 @@
#include <linux/inet.h>
#include <linux/in6.h>
#include <net/ipv6.h>
+#include <linux/netdevice.h>
#include <linux/nfs_xdr.h>
#include <linux/magic.h>
#include <linux/parser.h>
@@ -65,7 +66,6 @@
enum {
/* Mount options that take no arguments */
Opt_soft, Opt_hard,
- Opt_intr, Opt_nointr,
Opt_posix, Opt_noposix,
Opt_cto, Opt_nocto,
Opt_ac, Opt_noac,
@@ -92,8 +92,8 @@ enum {
Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost,
Opt_addr, Opt_mountaddr, Opt_clientaddr,
- /* Mount options that are ignored */
- Opt_userspace, Opt_deprecated,
+ /* Special mount options */
+ Opt_userspace, Opt_deprecated, Opt_sloppy,
Opt_err
};
@@ -101,10 +101,14 @@ enum {
static match_table_t nfs_mount_option_tokens = {
{ Opt_userspace, "bg" },
{ Opt_userspace, "fg" },
+ { Opt_userspace, "retry=%s" },
+
+ { Opt_sloppy, "sloppy" },
+
{ Opt_soft, "soft" },
{ Opt_hard, "hard" },
- { Opt_intr, "intr" },
- { Opt_nointr, "nointr" },
+ { Opt_deprecated, "intr" },
+ { Opt_deprecated, "nointr" },
{ Opt_posix, "posix" },
{ Opt_noposix, "noposix" },
{ Opt_cto, "cto" },
@@ -136,7 +140,6 @@ static match_table_t nfs_mount_option_tokens = {
{ Opt_acdirmin, "acdirmin=%u" },
{ Opt_acdirmax, "acdirmax=%u" },
{ Opt_actimeo, "actimeo=%u" },
- { Opt_userspace, "retry=%u" },
{ Opt_namelen, "namlen=%u" },
{ Opt_mountport, "mountport=%u" },
{ Opt_mountvers, "mountvers=%u" },
@@ -207,6 +210,7 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
static void nfs_kill_super(struct super_block *);
static void nfs_put_super(struct super_block *);
+static int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
static struct file_system_type nfs_fs_type = {
.owner = THIS_MODULE,
@@ -234,6 +238,7 @@ static const struct super_operations nfs_sops = {
.umount_begin = nfs_umount_begin,
.show_options = nfs_show_options,
.show_stats = nfs_show_stats,
+ .remount_fs = nfs_remount,
};
#ifdef CONFIG_NFS_V4
@@ -278,6 +283,7 @@ static const struct super_operations nfs4_sops = {
.umount_begin = nfs_umount_begin,
.show_options = nfs_show_options,
.show_stats = nfs_show_stats,
+ .remount_fs = nfs_remount,
};
#endif
@@ -514,13 +520,13 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss,
if (nfss->bsize != 0)
seq_printf(m, ",bsize=%u", nfss->bsize);
seq_printf(m, ",namlen=%u", nfss->namelen);
- if (nfss->acregmin != 3*HZ || showdefaults)
+ if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults)
seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ);
- if (nfss->acregmax != 60*HZ || showdefaults)
+ if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults)
seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ);
- if (nfss->acdirmin != 30*HZ || showdefaults)
+ if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults)
seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ);
- if (nfss->acdirmax != 60*HZ || showdefaults)
+ if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults)
seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ);
for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
if (nfss->flags & nfs_infop->flag)
@@ -702,49 +708,233 @@ static int nfs_verify_server_address(struct sockaddr *addr)
return 0;
}
+static void nfs_parse_ipv4_address(char *string, size_t str_len,
+ struct sockaddr *sap, size_t *addr_len)
+{
+ struct sockaddr_in *sin = (struct sockaddr_in *)sap;
+ u8 *addr = (u8 *)&sin->sin_addr.s_addr;
+
+ if (str_len <= INET_ADDRSTRLEN) {
+ dfprintk(MOUNT, "NFS: parsing IPv4 address %*s\n",
+ (int)str_len, string);
+
+ sin->sin_family = AF_INET;
+ *addr_len = sizeof(*sin);
+ if (in4_pton(string, str_len, addr, '\0', NULL))
+ return;
+ }
+
+ sap->sa_family = AF_UNSPEC;
+ *addr_len = 0;
+}
+
+#define IPV6_SCOPE_DELIMITER '%'
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static void nfs_parse_ipv6_scope_id(const char *string, const size_t str_len,
+ const char *delim,
+ struct sockaddr_in6 *sin6)
+{
+ char *p;
+ size_t len;
+
+ if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
+ return ;
+ if (*delim != IPV6_SCOPE_DELIMITER)
+ return;
+
+ len = (string + str_len) - delim - 1;
+ p = kstrndup(delim + 1, len, GFP_KERNEL);
+ if (p) {
+ unsigned long scope_id = 0;
+ struct net_device *dev;
+
+ dev = dev_get_by_name(&init_net, p);
+ if (dev != NULL) {
+ scope_id = dev->ifindex;
+ dev_put(dev);
+ } else {
+ /* scope_id is set to zero on error */
+ strict_strtoul(p, 10, &scope_id);
+ }
+
+ kfree(p);
+ sin6->sin6_scope_id = scope_id;
+ dfprintk(MOUNT, "NFS: IPv6 scope ID = %lu\n", scope_id);
+ }
+}
+
+static void nfs_parse_ipv6_address(char *string, size_t str_len,
+ struct sockaddr *sap, size_t *addr_len)
+{
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
+ u8 *addr = (u8 *)&sin6->sin6_addr.in6_u;
+ const char *delim;
+
+ if (str_len <= INET6_ADDRSTRLEN) {
+ dfprintk(MOUNT, "NFS: parsing IPv6 address %*s\n",
+ (int)str_len, string);
+
+ sin6->sin6_family = AF_INET6;
+ *addr_len = sizeof(*sin6);
+ if (in6_pton(string, str_len, addr, IPV6_SCOPE_DELIMITER, &delim)) {
+ nfs_parse_ipv6_scope_id(string, str_len, delim, sin6);
+ return;
+ }
+ }
+
+ sap->sa_family = AF_UNSPEC;
+ *addr_len = 0;
+}
+#else
+static void nfs_parse_ipv6_address(char *string, size_t str_len,
+ struct sockaddr *sap, size_t *addr_len)
+{
+ sap->sa_family = AF_UNSPEC;
+ *addr_len = 0;
+}
+#endif
+
/*
- * Parse string addresses passed in via a mount option,
- * and construct a sockaddr based on the result.
+ * Construct a sockaddr based on the contents of a string that contains
+ * an IP address in presentation format.
*
- * If address parsing fails, set the sockaddr's address
- * family to AF_UNSPEC to force nfs_verify_server_address()
- * to punt the mount.
+ * If there is a problem constructing the new sockaddr, set the address
+ * family to AF_UNSPEC.
*/
-static void nfs_parse_server_address(char *value,
- struct sockaddr *sap,
- size_t *len)
+static void nfs_parse_ip_address(char *string, size_t str_len,
+ struct sockaddr *sap, size_t *addr_len)
{
- if (strchr(value, ':')) {
- struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap;
- u8 *addr = (u8 *)&ap->sin6_addr.in6_u;
+ unsigned int i, colons;
- ap->sin6_family = AF_INET6;
- *len = sizeof(*ap);
- if (in6_pton(value, -1, addr, '\0', NULL))
- return;
- } else {
- struct sockaddr_in *ap = (struct sockaddr_in *)sap;
- u8 *addr = (u8 *)&ap->sin_addr.s_addr;
+ colons = 0;
+ for (i = 0; i < str_len; i++)
+ if (string[i] == ':')
+ colons++;
- ap->sin_family = AF_INET;
- *len = sizeof(*ap);
- if (in4_pton(value, -1, addr, '\0', NULL))
+ if (colons >= 2)
+ nfs_parse_ipv6_address(string, str_len, sap, addr_len);
+ else
+ nfs_parse_ipv4_address(string, str_len, sap, addr_len);
+}
+
+/*
+ * Sanity check the NFS transport protocol.
+ *
+ */
+static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt)
+{
+ switch (mnt->nfs_server.protocol) {
+ case XPRT_TRANSPORT_UDP:
+ case XPRT_TRANSPORT_TCP:
+ case XPRT_TRANSPORT_RDMA:
+ break;
+ default:
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ }
+}
+
+/*
+ * For text based NFSv2/v3 mounts, the mount protocol transport default
+ * settings should depend upon the specified NFS transport.
+ */
+static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt)
+{
+ nfs_validate_transport_protocol(mnt);
+
+ if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP ||
+ mnt->mount_server.protocol == XPRT_TRANSPORT_TCP)
return;
+ switch (mnt->nfs_server.protocol) {
+ case XPRT_TRANSPORT_UDP:
+ mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
+ break;
+ case XPRT_TRANSPORT_TCP:
+ case XPRT_TRANSPORT_RDMA:
+ mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
}
+}
- sap->sa_family = AF_UNSPEC;
- *len = 0;
+/*
+ * Parse the value of the 'sec=' option.
+ *
+ * The flavor_len setting is for v4 mounts.
+ */
+static int nfs_parse_security_flavors(char *value,
+ struct nfs_parsed_mount_data *mnt)
+{
+ substring_t args[MAX_OPT_ARGS];
+
+ dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value);
+
+ switch (match_token(value, nfs_secflavor_tokens, args)) {
+ case Opt_sec_none:
+ mnt->auth_flavor_len = 0;
+ mnt->auth_flavors[0] = RPC_AUTH_NULL;
+ break;
+ case Opt_sec_sys:
+ mnt->auth_flavor_len = 0;
+ mnt->auth_flavors[0] = RPC_AUTH_UNIX;
+ break;
+ case Opt_sec_krb5:
+ mnt->auth_flavor_len = 1;
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5;
+ break;
+ case Opt_sec_krb5i:
+ mnt->auth_flavor_len = 1;
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I;
+ break;
+ case Opt_sec_krb5p:
+ mnt->auth_flavor_len = 1;
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P;
+ break;
+ case Opt_sec_lkey:
+ mnt->auth_flavor_len = 1;
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY;
+ break;
+ case Opt_sec_lkeyi:
+ mnt->auth_flavor_len = 1;
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI;
+ break;
+ case Opt_sec_lkeyp:
+ mnt->auth_flavor_len = 1;
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP;
+ break;
+ case Opt_sec_spkm:
+ mnt->auth_flavor_len = 1;
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM;
+ break;
+ case Opt_sec_spkmi:
+ mnt->auth_flavor_len = 1;
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI;
+ break;
+ case Opt_sec_spkmp:
+ mnt->auth_flavor_len = 1;
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP;
+ break;
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+static void nfs_parse_invalid_value(const char *option)
+{
+ dfprintk(MOUNT, "NFS: bad value specified for %s option\n", option);
}
/*
* Error-check and convert a string of mount options from user space into
- * a data structure
+ * a data structure. The whole mount string is processed; bad options are
+ * skipped as they are encountered. If there were no errors, return 1;
+ * otherwise return 0 (zero).
*/
static int nfs_parse_mount_options(char *raw,
struct nfs_parsed_mount_data *mnt)
{
char *p, *string, *secdata;
- int rc;
+ int rc, sloppy = 0, errors = 0;
if (!raw) {
dfprintk(MOUNT, "NFS: mount options string was NULL.\n");
@@ -777,15 +967,16 @@ static int nfs_parse_mount_options(char *raw,
token = match_token(p, nfs_mount_option_tokens, args);
switch (token) {
+
+ /*
+ * boolean options: foo/nofoo
+ */
case Opt_soft:
mnt->flags |= NFS_MOUNT_SOFT;
break;
case Opt_hard:
mnt->flags &= ~NFS_MOUNT_SOFT;
break;
- case Opt_intr:
- case Opt_nointr:
- break;
case Opt_posix:
mnt->flags |= NFS_MOUNT_POSIX;
break;
@@ -819,20 +1010,14 @@ static int nfs_parse_mount_options(char *raw,
case Opt_udp:
mnt->flags &= ~NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
- mnt->timeo = 7;
- mnt->retrans = 5;
break;
case Opt_tcp:
mnt->flags |= NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
- mnt->timeo = 600;
- mnt->retrans = 2;
break;
case Opt_rdma:
mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */
mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
- mnt->timeo = 600;
- mnt->retrans = 2;
break;
case Opt_acl:
mnt->flags &= ~NFS_MOUNT_NOACL;
@@ -853,165 +1038,144 @@ static int nfs_parse_mount_options(char *raw,
mnt->flags |= NFS_MOUNT_UNSHARED;
break;
+ /*
+ * options that take numeric values
+ */
case Opt_port:
- if (match_int(args, &option))
- return 0;
- if (option < 0 || option > 65535)
- return 0;
- mnt->nfs_server.port = option;
+ if (match_int(args, &option) ||
+ option < 0 || option > USHORT_MAX) {
+ errors++;
+ nfs_parse_invalid_value("port");
+ } else
+ mnt->nfs_server.port = option;
break;
case Opt_rsize:
- if (match_int(args, &mnt->rsize))
- return 0;
+ if (match_int(args, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("rsize");
+ } else
+ mnt->rsize = option;
break;
case Opt_wsize:
- if (match_int(args, &mnt->wsize))
- return 0;
+ if (match_int(args, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("wsize");
+ } else
+ mnt->wsize = option;
break;
case Opt_bsize:
- if (match_int(args, &option))
- return 0;
- if (option < 0)
- return 0;
- mnt->bsize = option;
+ if (match_int(args, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("bsize");
+ } else
+ mnt->bsize = option;
break;
case Opt_timeo:
- if (match_int(args, &mnt->timeo))
- return 0;
+ if (match_int(args, &option) || option <= 0) {
+ errors++;
+ nfs_parse_invalid_value("timeo");
+ } else
+ mnt->timeo = option;
break;
case Opt_retrans:
- if (match_int(args, &mnt->retrans))
- return 0;
+ if (match_int(args, &option) || option <= 0) {
+ errors++;
+ nfs_parse_invalid_value("retrans");
+ } else
+ mnt->retrans = option;
break;
case Opt_acregmin:
- if (match_int(args, &mnt->acregmin))
- return 0;
+ if (match_int(args, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("acregmin");
+ } else
+ mnt->acregmin = option;
break;
case Opt_acregmax:
- if (match_int(args, &mnt->acregmax))
- return 0;
+ if (match_int(args, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("acregmax");
+ } else
+ mnt->acregmax = option;
break;
case Opt_acdirmin:
- if (match_int(args, &mnt->acdirmin))
- return 0;
+ if (match_int(args, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("acdirmin");
+ } else
+ mnt->acdirmin = option;
break;
case Opt_acdirmax:
- if (match_int(args, &mnt->acdirmax))
- return 0;
+ if (match_int(args, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("acdirmax");
+ } else
+ mnt->acdirmax = option;
break;
case Opt_actimeo:
- if (match_int(args, &option))
- return 0;
- if (option < 0)
- return 0;
- mnt->acregmin =
- mnt->acregmax =
- mnt->acdirmin =
- mnt->acdirmax = option;
+ if (match_int(args, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("actimeo");
+ } else
+ mnt->acregmin = mnt->acregmax =
+ mnt->acdirmin = mnt->acdirmax = option;
break;
case Opt_namelen:
- if (match_int(args, &mnt->namlen))
- return 0;
+ if (match_int(args, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("namlen");
+ } else
+ mnt->namlen = option;
break;
case Opt_mountport:
- if (match_int(args, &option))
- return 0;
- if (option < 0 || option > 65535)
- return 0;
- mnt->mount_server.port = option;
+ if (match_int(args, &option) ||
+ option < 0 || option > USHORT_MAX) {
+ errors++;
+ nfs_parse_invalid_value("mountport");
+ } else
+ mnt->mount_server.port = option;
break;
case Opt_mountvers:
- if (match_int(args, &option))
- return 0;
- if (option < 0)
- return 0;
- mnt->mount_server.version = option;
+ if (match_int(args, &option) ||
+ option < NFS_MNT_VERSION ||
+ option > NFS_MNT3_VERSION) {
+ errors++;
+ nfs_parse_invalid_value("mountvers");
+ } else
+ mnt->mount_server.version = option;
break;
case Opt_nfsvers:
- if (match_int(args, &option))
- return 0;
+ if (match_int(args, &option)) {
+ errors++;
+ nfs_parse_invalid_value("nfsvers");
+ break;
+ }
switch (option) {
- case 2:
+ case NFS2_VERSION:
mnt->flags &= ~NFS_MOUNT_VER3;
break;
- case 3:
+ case NFS3_VERSION:
mnt->flags |= NFS_MOUNT_VER3;
break;
default:
- goto out_unrec_vers;
+ errors++;
+ nfs_parse_invalid_value("nfsvers");
}
break;
+ /*
+ * options that take text values
+ */
case Opt_sec:
string = match_strdup(args);
if (string == NULL)
goto out_nomem;
- token = match_token(string, nfs_secflavor_tokens, args);
+ rc = nfs_parse_security_flavors(string, mnt);
kfree(string);
-
- /*
- * The flags setting is for v2/v3. The flavor_len
- * setting is for v4. v2/v3 also need to know the
- * difference between NULL and UNIX.
- */
- switch (token) {
- case Opt_sec_none:
- mnt->flags &= ~NFS_MOUNT_SECFLAVOUR;
- mnt->auth_flavor_len = 0;
- mnt->auth_flavors[0] = RPC_AUTH_NULL;
- break;
- case Opt_sec_sys:
- mnt->flags &= ~NFS_MOUNT_SECFLAVOUR;
- mnt->auth_flavor_len = 0;
- mnt->auth_flavors[0] = RPC_AUTH_UNIX;
- break;
- case Opt_sec_krb5:
- mnt->flags |= NFS_MOUNT_SECFLAVOUR;
- mnt->auth_flavor_len = 1;
- mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5;
- break;
- case Opt_sec_krb5i:
- mnt->flags |= NFS_MOUNT_SECFLAVOUR;
- mnt->auth_flavor_len = 1;
- mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I;
- break;
- case Opt_sec_krb5p:
- mnt->flags |= NFS_MOUNT_SECFLAVOUR;
- mnt->auth_flavor_len = 1;
- mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P;
- break;
- case Opt_sec_lkey:
- mnt->flags |= NFS_MOUNT_SECFLAVOUR;
- mnt->auth_flavor_len = 1;
- mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY;
- break;
- case Opt_sec_lkeyi:
- mnt->flags |= NFS_MOUNT_SECFLAVOUR;
- mnt->auth_flavor_len = 1;
- mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI;
- break;
- case Opt_sec_lkeyp:
- mnt->flags |= NFS_MOUNT_SECFLAVOUR;
- mnt->auth_flavor_len = 1;
- mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP;
- break;
- case Opt_sec_spkm:
- mnt->flags |= NFS_MOUNT_SECFLAVOUR;
- mnt->auth_flavor_len = 1;
- mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM;
- break;
- case Opt_sec_spkmi:
- mnt->flags |= NFS_MOUNT_SECFLAVOUR;
- mnt->auth_flavor_len = 1;
- mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI;
- break;
- case Opt_sec_spkmp:
- mnt->flags |= NFS_MOUNT_SECFLAVOUR;
- mnt->auth_flavor_len = 1;
- mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP;
- break;
- default:
- goto out_unrec_sec;
+ if (!rc) {
+ errors++;
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "security flavor\n");
}
break;
case Opt_proto:
@@ -1026,24 +1190,20 @@ static int nfs_parse_mount_options(char *raw,
case Opt_xprt_udp:
mnt->flags &= ~NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
- mnt->timeo = 7;
- mnt->retrans = 5;
break;
case Opt_xprt_tcp:
mnt->flags |= NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
- mnt->timeo = 600;
- mnt->retrans = 2;
break;
case Opt_xprt_rdma:
/* vector side protocols to TCP */
mnt->flags |= NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
- mnt->timeo = 600;
- mnt->retrans = 2;
break;
default:
- goto out_unrec_xprt;
+ errors++;
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "transport protocol\n");
}
break;
case Opt_mountproto:
@@ -1063,16 +1223,19 @@ static int nfs_parse_mount_options(char *raw,
break;
case Opt_xprt_rdma: /* not used for side protocols */
default:
- goto out_unrec_xprt;
+ errors++;
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "transport protocol\n");
}
break;
case Opt_addr:
string = match_strdup(args);
if (string == NULL)
goto out_nomem;
- nfs_parse_server_address(string, (struct sockaddr *)
- &mnt->nfs_server.address,
- &mnt->nfs_server.addrlen);
+ nfs_parse_ip_address(string, strlen(string),
+ (struct sockaddr *)
+ &mnt->nfs_server.address,
+ &mnt->nfs_server.addrlen);
kfree(string);
break;
case Opt_clientaddr:
@@ -1093,24 +1256,33 @@ static int nfs_parse_mount_options(char *raw,
string = match_strdup(args);
if (string == NULL)
goto out_nomem;
- nfs_parse_server_address(string, (struct sockaddr *)
- &mnt->mount_server.address,
- &mnt->mount_server.addrlen);
+ nfs_parse_ip_address(string, strlen(string),
+ (struct sockaddr *)
+ &mnt->mount_server.address,
+ &mnt->mount_server.addrlen);
kfree(string);
break;
+ /*
+ * Special options
+ */
+ case Opt_sloppy:
+ sloppy = 1;
+ dfprintk(MOUNT, "NFS: relaxing parsing rules\n");
+ break;
case Opt_userspace:
case Opt_deprecated:
+ dfprintk(MOUNT, "NFS: ignoring mount option "
+ "'%s'\n", p);
break;
default:
- goto out_unknown;
+ errors++;
+ dfprintk(MOUNT, "NFS: unrecognized mount option "
+ "'%s'\n", p);
}
}
- nfs_set_port((struct sockaddr *)&mnt->nfs_server.address,
- mnt->nfs_server.port);
-
return 1;
out_nomem:
@@ -1120,21 +1292,6 @@ out_security_failure:
free_secdata(secdata);
printk(KERN_INFO "NFS: security options invalid: %d\n", rc);
return 0;
-out_unrec_vers:
- printk(KERN_INFO "NFS: unrecognized NFS version number\n");
- return 0;
-
-out_unrec_xprt:
- printk(KERN_INFO "NFS: unrecognized transport protocol\n");
- return 0;
-
-out_unrec_sec:
- printk(KERN_INFO "NFS: unrecognized security flavor\n");
- return 0;
-
-out_unknown:
- printk(KERN_INFO "NFS: unknown mount option: %s\n", p);
- return 0;
}
/*
@@ -1188,11 +1345,146 @@ static int nfs_try_mount(struct nfs_parsed_mount_data *args,
if (status == 0)
return 0;
- dfprintk(MOUNT, "NFS: unable to mount server %s, error %d",
+ dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n",
hostname, status);
return status;
}
+static int nfs_parse_simple_hostname(const char *dev_name,
+ char **hostname, size_t maxnamlen,
+ char **export_path, size_t maxpathlen)
+{
+ size_t len;
+ char *colon, *comma;
+
+ colon = strchr(dev_name, ':');
+ if (colon == NULL)
+ goto out_bad_devname;
+
+ len = colon - dev_name;
+ if (len > maxnamlen)
+ goto out_hostname;
+
+ /* N.B. caller will free nfs_server.hostname in all cases */
+ *hostname = kstrndup(dev_name, len, GFP_KERNEL);
+ if (!*hostname)
+ goto out_nomem;
+
+ /* kill possible hostname list: not supported */
+ comma = strchr(*hostname, ',');
+ if (comma != NULL) {
+ if (comma == *hostname)
+ goto out_bad_devname;
+ *comma = '\0';
+ }
+
+ colon++;
+ len = strlen(colon);
+ if (len > maxpathlen)
+ goto out_path;
+ *export_path = kstrndup(colon, len, GFP_KERNEL);
+ if (!*export_path)
+ goto out_nomem;
+
+ dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path);
+ return 0;
+
+out_bad_devname:
+ dfprintk(MOUNT, "NFS: device name not in host:path format\n");
+ return -EINVAL;
+
+out_nomem:
+ dfprintk(MOUNT, "NFS: not enough memory to parse device name\n");
+ return -ENOMEM;
+
+out_hostname:
+ dfprintk(MOUNT, "NFS: server hostname too long\n");
+ return -ENAMETOOLONG;
+
+out_path:
+ dfprintk(MOUNT, "NFS: export pathname too long\n");
+ return -ENAMETOOLONG;
+}
+
+/*
+ * Hostname has square brackets around it because it contains one or
+ * more colons. We look for the first closing square bracket, and a
+ * colon must follow it.
+ */
+static int nfs_parse_protected_hostname(const char *dev_name,
+ char **hostname, size_t maxnamlen,
+ char **export_path, size_t maxpathlen)
+{
+ size_t len;
+ char *start, *end;
+
+ start = (char *)(dev_name + 1);
+
+ end = strchr(start, ']');
+ if (end == NULL)
+ goto out_bad_devname;
+ if (*(end + 1) != ':')
+ goto out_bad_devname;
+
+ len = end - start;
+ if (len > maxnamlen)
+ goto out_hostname;
+
+ /* N.B. caller will free nfs_server.hostname in all cases */
+ *hostname = kstrndup(start, len, GFP_KERNEL);
+ if (*hostname == NULL)
+ goto out_nomem;
+
+ end += 2;
+ len = strlen(end);
+ if (len > maxpathlen)
+ goto out_path;
+ *export_path = kstrndup(end, len, GFP_KERNEL);
+ if (!*export_path)
+ goto out_nomem;
+
+ return 0;
+
+out_bad_devname:
+ dfprintk(MOUNT, "NFS: device name not in host:path format\n");
+ return -EINVAL;
+
+out_nomem:
+ dfprintk(MOUNT, "NFS: not enough memory to parse device name\n");
+ return -ENOMEM;
+
+out_hostname:
+ dfprintk(MOUNT, "NFS: server hostname too long\n");
+ return -ENAMETOOLONG;
+
+out_path:
+ dfprintk(MOUNT, "NFS: export pathname too long\n");
+ return -ENAMETOOLONG;
+}
+
+/*
+ * Split "dev_name" into "hostname:export_path".
+ *
+ * The leftmost colon demarks the split between the server's hostname
+ * and the export path. If the hostname starts with a left square
+ * bracket, then it may contain colons.
+ *
+ * Note: caller frees hostname and export path, even on error.
+ */
+static int nfs_parse_devname(const char *dev_name,
+ char **hostname, size_t maxnamlen,
+ char **export_path, size_t maxpathlen)
+{
+ if (*dev_name == '[')
+ return nfs_parse_protected_hostname(dev_name,
+ hostname, maxnamlen,
+ export_path, maxpathlen);
+
+ return nfs_parse_simple_hostname(dev_name,
+ hostname, maxnamlen,
+ export_path, maxpathlen);
+}
+
/*
* Validate the NFS2/NFS3 mount data
* - fills in the mount root filehandle
@@ -1222,16 +1514,14 @@ static int nfs_validate_mount_data(void *options,
args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP);
args->rsize = NFS_MAX_FILE_IO_SIZE;
args->wsize = NFS_MAX_FILE_IO_SIZE;
- args->timeo = 600;
- args->retrans = 2;
- args->acregmin = 3;
- args->acregmax = 60;
- args->acdirmin = 30;
- args->acdirmax = 60;
+ args->acregmin = NFS_DEF_ACREGMIN;
+ args->acregmax = NFS_DEF_ACREGMAX;
+ args->acdirmin = NFS_DEF_ACDIRMIN;
+ args->acdirmax = NFS_DEF_ACDIRMAX;
args->mount_server.port = 0; /* autobind unless user sets port */
- args->mount_server.protocol = XPRT_TRANSPORT_UDP;
args->nfs_server.port = 0; /* autobind unless user sets port */
args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ args->auth_flavors[0] = RPC_AUTH_UNIX;
switch (data->version) {
case 1:
@@ -1289,7 +1579,9 @@ static int nfs_validate_mount_data(void *options,
args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL);
args->namlen = data->namlen;
args->bsize = data->bsize;
- args->auth_flavors[0] = data->pseudoflavor;
+
+ if (data->flags & NFS_MOUNT_SECFLAVOUR)
+ args->auth_flavors[0] = data->pseudoflavor;
if (!args->nfs_server.hostname)
goto out_nomem;
@@ -1321,8 +1613,6 @@ static int nfs_validate_mount_data(void *options,
break;
default: {
- unsigned int len;
- char *c;
int status;
if (nfs_parse_mount_options((char *)options, args) == 0)
@@ -1332,21 +1622,22 @@ static int nfs_validate_mount_data(void *options,
&args->nfs_server.address))
goto out_no_address;
- c = strchr(dev_name, ':');
- if (c == NULL)
- return -EINVAL;
- len = c - dev_name;
- /* N.B. caller will free nfs_server.hostname in all cases */
- args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL);
- if (!args->nfs_server.hostname)
- goto out_nomem;
+ nfs_set_port((struct sockaddr *)&args->nfs_server.address,
+ args->nfs_server.port);
- c++;
- if (strlen(c) > NFS_MAXPATHLEN)
- return -ENAMETOOLONG;
- args->nfs_server.export_path = c;
+ nfs_set_mount_transport_protocol(args);
+
+ status = nfs_parse_devname(dev_name,
+ &args->nfs_server.hostname,
+ PAGE_SIZE,
+ &args->nfs_server.export_path,
+ NFS_MAXPATHLEN);
+ if (!status)
+ status = nfs_try_mount(args, mntfh);
+
+ kfree(args->nfs_server.export_path);
+ args->nfs_server.export_path = NULL;
- status = nfs_try_mount(args, mntfh);
if (status)
return status;
@@ -1354,9 +1645,6 @@ static int nfs_validate_mount_data(void *options,
}
}
- if (!(args->flags & NFS_MOUNT_SECFLAVOUR))
- args->auth_flavors[0] = RPC_AUTH_UNIX;
-
#ifndef CONFIG_NFS_V3
if (args->flags & NFS_MOUNT_VER3)
goto out_v3_not_compiled;
@@ -1396,6 +1684,80 @@ out_invalid_fh:
return -EINVAL;
}
+static int
+nfs_compare_remount_data(struct nfs_server *nfss,
+ struct nfs_parsed_mount_data *data)
+{
+ if (data->flags != nfss->flags ||
+ data->rsize != nfss->rsize ||
+ data->wsize != nfss->wsize ||
+ data->retrans != nfss->client->cl_timeout->to_retries ||
+ data->auth_flavors[0] != nfss->client->cl_auth->au_flavor ||
+ data->acregmin != nfss->acregmin / HZ ||
+ data->acregmax != nfss->acregmax / HZ ||
+ data->acdirmin != nfss->acdirmin / HZ ||
+ data->acdirmax != nfss->acdirmax / HZ ||
+ data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) ||
+ data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen ||
+ memcmp(&data->nfs_server.address, &nfss->nfs_client->cl_addr,
+ data->nfs_server.addrlen) != 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int
+nfs_remount(struct super_block *sb, int *flags, char *raw_data)
+{
+ int error;
+ struct nfs_server *nfss = sb->s_fs_info;
+ struct nfs_parsed_mount_data *data;
+ struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data;
+ struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data;
+ u32 nfsvers = nfss->nfs_client->rpc_ops->version;
+
+ /*
+ * Userspace mount programs that send binary options generally send
+ * them populated with default values. We have no way to know which
+ * ones were explicitly specified. Fall back to legacy behavior and
+ * just return success.
+ */
+ if ((nfsvers == 4 && options4->version == 1) ||
+ (nfsvers <= 3 && options->version >= 1 &&
+ options->version <= 6))
+ return 0;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (data == NULL)
+ return -ENOMEM;
+
+ /* fill out struct with values from existing mount */
+ data->flags = nfss->flags;
+ data->rsize = nfss->rsize;
+ data->wsize = nfss->wsize;
+ data->retrans = nfss->client->cl_timeout->to_retries;
+ data->auth_flavors[0] = nfss->client->cl_auth->au_flavor;
+ data->acregmin = nfss->acregmin / HZ;
+ data->acregmax = nfss->acregmax / HZ;
+ data->acdirmin = nfss->acdirmin / HZ;
+ data->acdirmax = nfss->acdirmax / HZ;
+ data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ;
+ data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen;
+ memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr,
+ data->nfs_server.addrlen);
+
+ /* overwrite those values with any that were specified */
+ error = nfs_parse_mount_options((char *)options, data);
+ if (error < 0)
+ goto out;
+
+ /* compare new mount options with old ones */
+ error = nfs_compare_remount_data(nfss, data);
+out:
+ kfree(data);
+ return error;
+}
+
/*
* Initialise the common bits of the superblock
*/
@@ -1811,14 +2173,13 @@ static int nfs4_validate_mount_data(void *options,
args->rsize = NFS_MAX_FILE_IO_SIZE;
args->wsize = NFS_MAX_FILE_IO_SIZE;
- args->timeo = 600;
- args->retrans = 2;
- args->acregmin = 3;
- args->acregmax = 60;
- args->acdirmin = 30;
- args->acdirmax = 60;
+ args->acregmin = NFS_DEF_ACREGMIN;
+ args->acregmax = NFS_DEF_ACREGMAX;
+ args->acdirmin = NFS_DEF_ACDIRMIN;
+ args->acdirmax = NFS_DEF_ACDIRMAX;
args->nfs_server.port = NFS_PORT; /* 2049 unless user set port= */
- args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ args->auth_flavors[0] = RPC_AUTH_UNIX;
+ args->auth_flavor_len = 0;
switch (data->version) {
case 1:
@@ -1834,18 +2195,13 @@ static int nfs4_validate_mount_data(void *options,
&args->nfs_server.address))
goto out_no_address;
- switch (data->auth_flavourlen) {
- case 0:
- args->auth_flavors[0] = RPC_AUTH_UNIX;
- break;
- case 1:
+ if (data->auth_flavourlen) {
+ if (data->auth_flavourlen > 1)
+ goto out_inval_auth;
if (copy_from_user(&args->auth_flavors[0],
data->auth_flavours,
sizeof(args->auth_flavors[0])))
return -EFAULT;
- break;
- default:
- goto out_inval_auth;
}
c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN);
@@ -1879,10 +2235,11 @@ static int nfs4_validate_mount_data(void *options,
args->acdirmin = data->acdirmin;
args->acdirmax = data->acdirmax;
args->nfs_server.protocol = data->proto;
+ nfs_validate_transport_protocol(args);
break;
default: {
- unsigned int len;
+ int status;
if (nfs_parse_mount_options((char *)options, args) == 0)
return -EINVAL;
@@ -1891,44 +2248,25 @@ static int nfs4_validate_mount_data(void *options,
&args->nfs_server.address))
return -EINVAL;
- switch (args->auth_flavor_len) {
- case 0:
- args->auth_flavors[0] = RPC_AUTH_UNIX;
- break;
- case 1:
- break;
- default:
- goto out_inval_auth;
- }
+ nfs_set_port((struct sockaddr *)&args->nfs_server.address,
+ args->nfs_server.port);
- /*
- * Split "dev_name" into "hostname:mntpath".
- */
- c = strchr(dev_name, ':');
- if (c == NULL)
- return -EINVAL;
- /* while calculating len, pretend ':' is '\0' */
- len = c - dev_name;
- if (len > NFS4_MAXNAMLEN)
- return -ENAMETOOLONG;
- /* N.B. caller will free nfs_server.hostname in all cases */
- args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL);
- if (!args->nfs_server.hostname)
- goto out_nomem;
-
- c++; /* step over the ':' */
- len = strlen(c);
- if (len > NFS4_MAXPATHLEN)
- return -ENAMETOOLONG;
- args->nfs_server.export_path = kstrndup(c, len, GFP_KERNEL);
- if (!args->nfs_server.export_path)
- goto out_nomem;
+ nfs_validate_transport_protocol(args);
- dprintk("NFS: MNTPATH: '%s'\n", args->nfs_server.export_path);
+ if (args->auth_flavor_len > 1)
+ goto out_inval_auth;
if (args->client_address == NULL)
goto out_no_client_address;
+ status = nfs_parse_devname(dev_name,
+ &args->nfs_server.hostname,
+ NFS4_MAXNAMLEN,
+ &args->nfs_server.export_path,
+ NFS4_MAXPATHLEN);
+ if (status < 0)
+ return status;
+
break;
}
}
@@ -1944,10 +2282,6 @@ out_inval_auth:
data->auth_flavourlen);
return -EINVAL;
-out_nomem:
- dfprintk(MOUNT, "NFS4: not enough memory to handle mount options\n");
- return -ENOMEM;
-
out_no_address:
dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");
return -EINVAL;
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-17 05:59:04 +0000