*
* nfs superblock handling functions
*
- * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some
+ * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
* experimental NFS changes. Modularisation taken straight from SYS5 fs.
*
* Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/metrics.h>
+#include <linux/sunrpc/xprtsock.h>
+#include <linux/sunrpc/xprtrdma.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_mount.h>
#include <linux/nfs4_mount.h>
#include <linux/nfs_idmap.h>
#include <linux/vfs.h>
#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>
#include <asm/system.h>
#include <asm/uaccess.h>
#include "delegation.h"
#include "iostat.h"
#include "internal.h"
+#include "fscache.h"
#define NFSDBG_FACILITY NFSDBG_VFS
-static void nfs_umount_begin(struct vfsmount *, int);
+enum {
+ /* Mount options that take no arguments */
+ Opt_soft, Opt_hard,
+ Opt_posix, Opt_noposix,
+ Opt_cto, Opt_nocto,
+ Opt_ac, Opt_noac,
+ Opt_lock, Opt_nolock,
+ Opt_v2, Opt_v3,
+ Opt_udp, Opt_tcp, Opt_rdma,
+ Opt_acl, Opt_noacl,
+ Opt_rdirplus, Opt_nordirplus,
+ Opt_sharecache, Opt_nosharecache,
+ Opt_resvport, Opt_noresvport,
+ Opt_fscache, Opt_nofscache,
+
+ /* Mount options that take integer arguments */
+ Opt_port,
+ Opt_rsize, Opt_wsize, Opt_bsize,
+ Opt_timeo, Opt_retrans,
+ Opt_acregmin, Opt_acregmax,
+ Opt_acdirmin, Opt_acdirmax,
+ Opt_actimeo,
+ Opt_namelen,
+ Opt_mountport,
+ Opt_mountvers,
+ Opt_nfsvers,
+
+ /* Mount options that take string arguments */
+ Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost,
+ Opt_addr, Opt_mountaddr, Opt_clientaddr,
+ Opt_lookupcache,
+ Opt_fscache_uniq,
+
+ /* Special mount options */
+ Opt_userspace, Opt_deprecated, Opt_sloppy,
+
+ Opt_err
+};
+
+static const 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_deprecated, "intr" },
+ { Opt_deprecated, "nointr" },
+ { Opt_posix, "posix" },
+ { Opt_noposix, "noposix" },
+ { Opt_cto, "cto" },
+ { Opt_nocto, "nocto" },
+ { Opt_ac, "ac" },
+ { Opt_noac, "noac" },
+ { Opt_lock, "lock" },
+ { Opt_nolock, "nolock" },
+ { Opt_v2, "v2" },
+ { Opt_v3, "v3" },
+ { Opt_udp, "udp" },
+ { Opt_tcp, "tcp" },
+ { Opt_rdma, "rdma" },
+ { Opt_acl, "acl" },
+ { Opt_noacl, "noacl" },
+ { Opt_rdirplus, "rdirplus" },
+ { Opt_nordirplus, "nordirplus" },
+ { Opt_sharecache, "sharecache" },
+ { Opt_nosharecache, "nosharecache" },
+ { Opt_resvport, "resvport" },
+ { Opt_noresvport, "noresvport" },
+ { Opt_fscache, "fsc" },
+ { Opt_fscache_uniq, "fsc=%s" },
+ { Opt_nofscache, "nofsc" },
+
+ { Opt_port, "port=%u" },
+ { Opt_rsize, "rsize=%u" },
+ { Opt_wsize, "wsize=%u" },
+ { Opt_bsize, "bsize=%u" },
+ { Opt_timeo, "timeo=%u" },
+ { Opt_retrans, "retrans=%u" },
+ { Opt_acregmin, "acregmin=%u" },
+ { Opt_acregmax, "acregmax=%u" },
+ { Opt_acdirmin, "acdirmin=%u" },
+ { Opt_acdirmax, "acdirmax=%u" },
+ { Opt_actimeo, "actimeo=%u" },
+ { Opt_namelen, "namlen=%u" },
+ { Opt_mountport, "mountport=%u" },
+ { Opt_mountvers, "mountvers=%u" },
+ { Opt_nfsvers, "nfsvers=%u" },
+ { Opt_nfsvers, "vers=%u" },
+
+ { Opt_sec, "sec=%s" },
+ { Opt_proto, "proto=%s" },
+ { Opt_mountproto, "mountproto=%s" },
+ { Opt_addr, "addr=%s" },
+ { Opt_clientaddr, "clientaddr=%s" },
+ { Opt_mounthost, "mounthost=%s" },
+ { Opt_mountaddr, "mountaddr=%s" },
+
+ { Opt_lookupcache, "lookupcache=%s" },
+
+ { Opt_err, NULL }
+};
+
+enum {
+ Opt_xprt_udp, Opt_xprt_tcp, Opt_xprt_rdma,
+
+ Opt_xprt_err
+};
+
+static const match_table_t nfs_xprt_protocol_tokens = {
+ { Opt_xprt_udp, "udp" },
+ { Opt_xprt_tcp, "tcp" },
+ { Opt_xprt_rdma, "rdma" },
+
+ { Opt_xprt_err, NULL }
+};
+
+enum {
+ Opt_sec_none, Opt_sec_sys,
+ Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
+ Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp,
+ Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp,
+
+ Opt_sec_err
+};
+
+static const match_table_t nfs_secflavor_tokens = {
+ { Opt_sec_none, "none" },
+ { Opt_sec_none, "null" },
+ { Opt_sec_sys, "sys" },
+
+ { Opt_sec_krb5, "krb5" },
+ { Opt_sec_krb5i, "krb5i" },
+ { Opt_sec_krb5p, "krb5p" },
+
+ { Opt_sec_lkey, "lkey" },
+ { Opt_sec_lkeyi, "lkeyi" },
+ { Opt_sec_lkeyp, "lkeyp" },
+
+ { Opt_sec_spkm, "spkm3" },
+ { Opt_sec_spkmi, "spkm3i" },
+ { Opt_sec_spkmp, "spkm3p" },
+
+ { Opt_sec_err, NULL }
+};
+
+enum {
+ Opt_lookupcache_all, Opt_lookupcache_positive,
+ Opt_lookupcache_none,
+
+ Opt_lookupcache_err
+};
+
+static match_table_t nfs_lookupcache_tokens = {
+ { Opt_lookupcache_all, "all" },
+ { Opt_lookupcache_positive, "pos" },
+ { Opt_lookupcache_positive, "positive" },
+ { Opt_lookupcache_none, "none" },
+
+ { Opt_lookupcache_err, NULL }
+};
+
+
+static void nfs_umount_begin(struct super_block *);
static int nfs_statfs(struct dentry *, struct kstatfs *);
static int nfs_show_options(struct seq_file *, struct vfsmount *);
static int nfs_show_stats(struct seq_file *, struct vfsmount *);
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 int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
static struct file_system_type nfs_fs_type = {
.owner = THIS_MODULE,
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-static struct super_operations nfs_sops = {
+static const struct super_operations nfs_sops = {
.alloc_inode = nfs_alloc_inode,
.destroy_inode = nfs_destroy_inode,
.write_inode = nfs_write_inode,
.umount_begin = nfs_umount_begin,
.show_options = nfs_show_options,
.show_stats = nfs_show_stats,
+ .remount_fs = nfs_remount,
};
#ifdef CONFIG_NFS_V4
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-static struct super_operations nfs4_sops = {
+static const struct super_operations nfs4_sops = {
.alloc_inode = nfs_alloc_inode,
.destroy_inode = nfs_destroy_inode,
.write_inode = nfs_write_inode,
.umount_begin = nfs_umount_begin,
.show_options = nfs_show_options,
.show_stats = nfs_show_stats,
+ .remount_fs = nfs_remount,
};
#endif
-static struct shrinker *acl_shrinker;
+static struct shrinker acl_shrinker = {
+ .shrink = nfs_access_cache_shrinker,
+ .seeks = DEFAULT_SEEKS,
+};
/*
* Register the NFS filesystems
if (ret < 0)
goto error_0;
-#ifdef CONFIG_NFS_V4
ret = nfs_register_sysctl();
if (ret < 0)
goto error_1;
+#ifdef CONFIG_NFS_V4
ret = register_filesystem(&nfs4_fs_type);
if (ret < 0)
goto error_2;
#endif
- acl_shrinker = set_shrinker(DEFAULT_SEEKS, nfs_access_cache_shrinker);
+ register_shrinker(&acl_shrinker);
return 0;
#ifdef CONFIG_NFS_V4
error_2:
nfs_unregister_sysctl();
+#endif
error_1:
unregister_filesystem(&nfs_fs_type);
-#endif
error_0:
return ret;
}
*/
void __exit unregister_nfs_fs(void)
{
- if (acl_shrinker != NULL)
- remove_shrinker(acl_shrinker);
+ unregister_shrinker(&acl_shrinker);
#ifdef CONFIG_NFS_V4
unregister_filesystem(&nfs4_fs_type);
- nfs_unregister_sysctl();
#endif
+ nfs_unregister_sysctl();
unregister_filesystem(&nfs_fs_type);
}
+void nfs_sb_active(struct super_block *sb)
+{
+ struct nfs_server *server = NFS_SB(sb);
+
+ if (atomic_inc_return(&server->active) == 1)
+ atomic_inc(&sb->s_active);
+}
+
+void nfs_sb_deactive(struct super_block *sb)
+{
+ struct nfs_server *server = NFS_SB(sb);
+
+ if (atomic_dec_and_test(&server->active))
+ deactivate_super(sb);
+}
+
/*
* Deliver file system statistics to userspace
*/
};
int error;
- lock_kernel();
-
error = server->nfs_client->rpc_ops->statfs(server, fh, &res);
- buf->f_type = NFS_SUPER_MAGIC;
if (error < 0)
goto out_err;
+ buf->f_type = NFS_SUPER_MAGIC;
/*
* Current versions of glibc do not correctly handle the
buf->f_ffree = res.afiles;
buf->f_namelen = server->namelen;
- out:
- unlock_kernel();
+
return 0;
out_err:
- dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
- buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
- goto out;
-
+ dprintk("%s: statfs error = %d\n", __func__, -error);
+ return error;
}
/*
{ RPC_AUTH_GSS_SPKM, "spkm" },
{ RPC_AUTH_GSS_SPKMI, "spkmi" },
{ RPC_AUTH_GSS_SPKMP, "spkmp" },
- { -1, "unknown" }
+ { UINT_MAX, "unknown" }
};
int i;
- for (i=0; sec_flavours[i].flavour != -1; i++) {
+ for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) {
if (sec_flavours[i].flavour == flavour)
break;
}
return sec_flavours[i].str;
}
+static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss,
+ int showdefaults)
+{
+ struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address;
+
+ switch (sap->sa_family) {
+ case AF_INET: {
+ struct sockaddr_in *sin = (struct sockaddr_in *)sap;
+ seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr);
+ break;
+ }
+ case AF_INET6: {
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
+ seq_printf(m, ",mountaddr=%pI6", &sin6->sin6_addr);
+ break;
+ }
+ default:
+ if (showdefaults)
+ seq_printf(m, ",mountaddr=unspecified");
+ }
+
+ if (nfss->mountd_version || showdefaults)
+ seq_printf(m, ",mountvers=%u", nfss->mountd_version);
+ if (nfss->mountd_port || showdefaults)
+ seq_printf(m, ",mountport=%u", nfss->mountd_port);
+
+ switch (nfss->mountd_protocol) {
+ case IPPROTO_UDP:
+ seq_printf(m, ",mountproto=udp");
+ break;
+ case IPPROTO_TCP:
+ seq_printf(m, ",mountproto=tcp");
+ break;
+ default:
+ if (showdefaults)
+ seq_printf(m, ",mountproto=auto");
+ }
+}
+
/*
* Describe the mount options in force on this server representation
*/
-static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
+static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss,
+ int showdefaults)
{
static const struct proc_nfs_info {
int flag;
const char *nostr;
} nfs_info[] = {
{ NFS_MOUNT_SOFT, ",soft", ",hard" },
- { NFS_MOUNT_INTR, ",intr", "" },
+ { NFS_MOUNT_INTR, ",intr", ",nointr" },
+ { NFS_MOUNT_POSIX, ",posix", "" },
{ NFS_MOUNT_NOCTO, ",nocto", "" },
{ NFS_MOUNT_NOAC, ",noac", "" },
{ NFS_MOUNT_NONLM, ",nolock", "" },
{ NFS_MOUNT_NOACL, ",noacl", "" },
+ { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" },
+ { NFS_MOUNT_UNSHARED, ",nosharecache", "" },
+ { NFS_MOUNT_NORESVPORT, ",noresvport", "" },
{ 0, NULL, NULL }
};
const struct proc_nfs_info *nfs_infop;
struct nfs_client *clp = nfss->nfs_client;
- char buf[12];
- const char *proto;
-
- seq_printf(m, ",vers=%d", clp->rpc_ops->version);
- seq_printf(m, ",rsize=%d", nfss->rsize);
- seq_printf(m, ",wsize=%d", nfss->wsize);
- if (nfss->acregmin != 3*HZ || showdefaults)
- seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
- if (nfss->acregmax != 60*HZ || showdefaults)
- seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
- if (nfss->acdirmin != 30*HZ || showdefaults)
- seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
- if (nfss->acdirmax != 60*HZ || showdefaults)
- seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
+ u32 version = clp->rpc_ops->version;
+
+ seq_printf(m, ",vers=%u", version);
+ seq_printf(m, ",rsize=%u", nfss->rsize);
+ seq_printf(m, ",wsize=%u", nfss->wsize);
+ if (nfss->bsize != 0)
+ seq_printf(m, ",bsize=%u", nfss->bsize);
+ seq_printf(m, ",namlen=%u", nfss->namelen);
+ if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults)
+ seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ);
+ if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults)
+ seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ);
+ if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults)
+ seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ);
+ 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)
seq_puts(m, nfs_infop->str);
else
seq_puts(m, nfs_infop->nostr);
}
- switch (nfss->client->cl_xprt->prot) {
- case IPPROTO_TCP:
- proto = "tcp";
- break;
- case IPPROTO_UDP:
- proto = "udp";
- break;
- default:
- snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
- proto = buf;
- }
- seq_printf(m, ",proto=%s", proto);
- seq_printf(m, ",timeo=%lu", 10U * clp->retrans_timeo / HZ);
- seq_printf(m, ",retrans=%u", clp->retrans_count);
+ seq_printf(m, ",proto=%s",
+ rpc_peeraddr2str(nfss->client, RPC_DISPLAY_PROTO));
+ if (version == 4) {
+ if (nfss->port != NFS_PORT)
+ seq_printf(m, ",port=%u", nfss->port);
+ } else
+ if (nfss->port)
+ seq_printf(m, ",port=%u", nfss->port);
+
+ seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ);
+ seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries);
seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor));
+
+ if (version != 4)
+ nfs_show_mountd_options(m, nfss, showdefaults);
+
+#ifdef CONFIG_NFS_V4
+ if (clp->rpc_ops->version == 4)
+ seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr);
+#endif
+ if (nfss->options & NFS_OPTION_FSCACHE)
+ seq_printf(m, ",fsc");
}
/*
nfs_show_mount_options(m, nfss, 0);
- seq_puts(m, ",addr=");
- seq_escape(m, nfss->nfs_client->cl_hostname, " \t\n\\");
+ seq_printf(m, ",addr=%s",
+ rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient,
+ RPC_DISPLAY_ADDR));
return 0;
}
seq_printf(m, "\n\tcaps:\t");
seq_printf(m, "caps=0x%x", nfss->caps);
- seq_printf(m, ",wtmult=%d", nfss->wtmult);
- seq_printf(m, ",dtsize=%d", nfss->dtsize);
- seq_printf(m, ",bsize=%d", nfss->bsize);
- seq_printf(m, ",namelen=%d", nfss->namelen);
+ seq_printf(m, ",wtmult=%u", nfss->wtmult);
+ seq_printf(m, ",dtsize=%u", nfss->dtsize);
+ seq_printf(m, ",bsize=%u", nfss->bsize);
+ seq_printf(m, ",namlen=%u", nfss->namelen);
#ifdef CONFIG_NFS_V4
- if (nfss->nfs_client->cl_nfsversion == 4) {
+ if (nfss->nfs_client->rpc_ops->version == 4) {
seq_printf(m, "\n\tnfsv4:\t");
seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
/*
* Display security flavor in effect for this mount
*/
- seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor);
+ seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor);
if (auth->au_flavor)
- seq_printf(m, ",pseudoflavor=%d", auth->au_flavor);
+ seq_printf(m, ",pseudoflavor=%u", auth->au_flavor);
/*
* Display superblock I/O counters
totals.events[i] += stats->events[i];
for (i = 0; i < __NFSIOS_BYTESMAX; i++)
totals.bytes[i] += stats->bytes[i];
+#ifdef CONFIG_NFS_FSCACHE
+ for (i = 0; i < __NFSIOS_FSCACHEMAX; i++)
+ totals.fscache[i] += stats->fscache[i];
+#endif
preempt_enable();
}
seq_printf(m, "\n\tbytes:\t");
for (i = 0; i < __NFSIOS_BYTESMAX; i++)
seq_printf(m, "%Lu ", totals.bytes[i]);
+#ifdef CONFIG_NFS_FSCACHE
+ if (nfss->options & NFS_OPTION_FSCACHE) {
+ seq_printf(m, "\n\tfsc:\t");
+ for (i = 0; i < __NFSIOS_FSCACHEMAX; i++)
+ seq_printf(m, "%Lu ", totals.bytes[i]);
+ }
+#endif
seq_printf(m, "\n");
rpc_print_iostats(m, nfss->client);
* Begin unmount by attempting to remove all automounted mountpoints we added
* in response to xdev traversals and referrals
*/
-static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
+static void nfs_umount_begin(struct super_block *sb)
{
- shrink_submounts(vfsmnt, &nfs_automount_list);
+ struct nfs_server *server;
+ struct rpc_clnt *rpc;
+
+ lock_kernel();
+
+ server = NFS_SB(sb);
+ /* -EIO all pending I/O */
+ rpc = server->client_acl;
+ if (!IS_ERR(rpc))
+ rpc_killall_tasks(rpc);
+ rpc = server->client;
+ if (!IS_ERR(rpc))
+ rpc_killall_tasks(rpc);
+
+ unlock_kernel();
}
/*
- * Validate the NFS2/NFS3 mount data
- * - fills in the mount root filehandle
+ * Sanity-check a server address provided by the mount command.
+ *
+ * Address family must be initialized, and address must not be
+ * the ANY address for that family.
*/
-static int nfs_validate_mount_data(struct nfs_mount_data *data,
- struct nfs_fh *mntfh)
+static int nfs_verify_server_address(struct sockaddr *addr)
{
- if (data == NULL) {
- dprintk("%s: missing data argument\n", __FUNCTION__);
- return -EINVAL;
+ switch (addr->sa_family) {
+ case AF_INET: {
+ struct sockaddr_in *sa = (struct sockaddr_in *)addr;
+ return sa->sin_addr.s_addr != htonl(INADDR_ANY);
+ }
+ case AF_INET6: {
+ struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr;
+ return !ipv6_addr_any(sa);
+ }
}
- if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
- dprintk("%s: bad mount version\n", __FUNCTION__);
- return -EINVAL;
+ 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;
}
- switch (data->version) {
- case 1:
- data->namlen = 0;
- case 2:
- data->bsize = 0;
- case 3:
- if (data->flags & NFS_MOUNT_VER3) {
- dprintk("%s: mount structure version %d does not support NFSv3\n",
- __FUNCTION__,
- data->version);
- return -EINVAL;
- }
- data->root.size = NFS2_FHSIZE;
- memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
- case 4:
- if (data->flags & NFS_MOUNT_SECFLAVOUR) {
- dprintk("%s: mount structure version %d does not support strong security\n",
- __FUNCTION__,
- data->version);
- return -EINVAL;
+ sap->sa_family = AF_UNSPEC;
+ *addr_len = 0;
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static int 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 ((string + str_len) == delim)
+ return 1;
+
+ if (*delim != IPV6_SCOPE_DELIMITER)
+ return 0;
+
+ if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
+ return 0;
+
+ 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 {
+ if (strict_strtoul(p, 10, &scope_id) == 0) {
+ kfree(p);
+ return 0;
}
- case 5:
- memset(data->context, 0, sizeof(data->context));
+ }
+
+ kfree(p);
+
+ sin6->sin6_scope_id = scope_id;
+ dfprintk(MOUNT, "NFS: IPv6 scope ID = %lu\n", scope_id);
+ return 1;
}
- /* Set the pseudoflavor */
- if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
- data->pseudoflavor = RPC_AUTH_UNIX;
+ return 0;
+}
-#ifndef CONFIG_NFS_V3
- /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
- if (data->flags & NFS_MOUNT_VER3) {
- dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
- return -EPROTONOSUPPORT;
+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) != 0) {
+ if (nfs_parse_ipv6_scope_id(string, str_len,
+ delim, sin6) != 0)
+ return;
+ }
}
-#endif /* CONFIG_NFS_V3 */
- /* We now require that the mount process passes the remote address */
- if (data->addr.sin_addr.s_addr == INADDR_ANY) {
- dprintk("%s: mount program didn't pass remote address!\n",
- __FUNCTION__);
- return -EINVAL;
+ 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
+
+/*
+ * Construct a sockaddr based on the contents of a string that contains
+ * an IP address in presentation format.
+ *
+ * If there is a problem constructing the new sockaddr, set the address
+ * family to AF_UNSPEC.
+ */
+void nfs_parse_ip_address(char *string, size_t str_len,
+ struct sockaddr *sap, size_t *addr_len)
+{
+ unsigned int i, colons;
+
+ colons = 0;
+ for (i = 0; i < str_len; i++)
+ if (string[i] == ':')
+ colons++;
+
+ 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;
+ }
+}
+
+/*
+ * 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. 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, sloppy = 0, errors = 0;
+
+ if (!raw) {
+ dfprintk(MOUNT, "NFS: mount options string was NULL.\n");
+ return 1;
+ }
+ dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw);
+
+ secdata = alloc_secdata();
+ if (!secdata)
+ goto out_nomem;
+
+ rc = security_sb_copy_data(raw, secdata);
+ if (rc)
+ goto out_security_failure;
+
+ rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts);
+ if (rc)
+ goto out_security_failure;
+
+ free_secdata(secdata);
+
+ while ((p = strsep(&raw, ",")) != NULL) {
+ substring_t args[MAX_OPT_ARGS];
+ int option, token;
+
+ if (!*p)
+ continue;
+
+ dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p);
+
+ 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_posix:
+ mnt->flags |= NFS_MOUNT_POSIX;
+ break;
+ case Opt_noposix:
+ mnt->flags &= ~NFS_MOUNT_POSIX;
+ break;
+ case Opt_cto:
+ mnt->flags &= ~NFS_MOUNT_NOCTO;
+ break;
+ case Opt_nocto:
+ mnt->flags |= NFS_MOUNT_NOCTO;
+ break;
+ case Opt_ac:
+ mnt->flags &= ~NFS_MOUNT_NOAC;
+ break;
+ case Opt_noac:
+ mnt->flags |= NFS_MOUNT_NOAC;
+ break;
+ case Opt_lock:
+ mnt->flags &= ~NFS_MOUNT_NONLM;
+ break;
+ case Opt_nolock:
+ mnt->flags |= NFS_MOUNT_NONLM;
+ break;
+ case Opt_v2:
+ mnt->flags &= ~NFS_MOUNT_VER3;
+ break;
+ case Opt_v3:
+ mnt->flags |= NFS_MOUNT_VER3;
+ break;
+ case Opt_udp:
+ mnt->flags &= ~NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
+ break;
+ case Opt_tcp:
+ mnt->flags |= NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ break;
+ case Opt_rdma:
+ mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
+ xprt_load_transport(p);
+ break;
+ case Opt_acl:
+ mnt->flags &= ~NFS_MOUNT_NOACL;
+ break;
+ case Opt_noacl:
+ mnt->flags |= NFS_MOUNT_NOACL;
+ break;
+ case Opt_rdirplus:
+ mnt->flags &= ~NFS_MOUNT_NORDIRPLUS;
+ break;
+ case Opt_nordirplus:
+ mnt->flags |= NFS_MOUNT_NORDIRPLUS;
+ break;
+ case Opt_sharecache:
+ mnt->flags &= ~NFS_MOUNT_UNSHARED;
+ break;
+ case Opt_nosharecache:
+ mnt->flags |= NFS_MOUNT_UNSHARED;
+ break;
+ case Opt_resvport:
+ mnt->flags &= ~NFS_MOUNT_NORESVPORT;
+ break;
+ case Opt_noresvport:
+ mnt->flags |= NFS_MOUNT_NORESVPORT;
+ break;
+ case Opt_fscache:
+ mnt->options |= NFS_OPTION_FSCACHE;
+ kfree(mnt->fscache_uniq);
+ mnt->fscache_uniq = NULL;
+ break;
+ case Opt_nofscache:
+ mnt->options &= ~NFS_OPTION_FSCACHE;
+ kfree(mnt->fscache_uniq);
+ mnt->fscache_uniq = NULL;
+ break;
+ case Opt_fscache_uniq:
+ string = match_strdup(args);
+ if (!string)
+ goto out_nomem;
+ kfree(mnt->fscache_uniq);
+ mnt->fscache_uniq = string;
+ mnt->options |= NFS_OPTION_FSCACHE;
+ break;
+
+ /*
+ * options that take numeric values
+ */
+ case Opt_port:
+ 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, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("rsize");
+ } else
+ mnt->rsize = option;
+ break;
+ case Opt_wsize:
+ 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) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("bsize");
+ } else
+ mnt->bsize = option;
+ break;
+ case Opt_timeo:
+ 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, &option) || option <= 0) {
+ errors++;
+ nfs_parse_invalid_value("retrans");
+ } else
+ mnt->retrans = option;
+ break;
+ case Opt_acregmin:
+ 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, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("acregmax");
+ } else
+ mnt->acregmax = option;
+ break;
+ case Opt_acdirmin:
+ 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, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("acdirmax");
+ } else
+ mnt->acdirmax = option;
+ break;
+ case Opt_actimeo:
+ 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, &option) || option < 0) {
+ errors++;
+ nfs_parse_invalid_value("namlen");
+ } else
+ mnt->namlen = option;
+ break;
+ case Opt_mountport:
+ 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) ||
+ 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)) {
+ errors++;
+ nfs_parse_invalid_value("nfsvers");
+ break;
+ }
+ switch (option) {
+ case NFS2_VERSION:
+ mnt->flags &= ~NFS_MOUNT_VER3;
+ break;
+ case NFS3_VERSION:
+ mnt->flags |= NFS_MOUNT_VER3;
+ break;
+ default:
+ 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;
+ rc = nfs_parse_security_flavors(string, mnt);
+ kfree(string);
+ if (!rc) {
+ errors++;
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "security flavor\n");
+ }
+ break;
+ case Opt_proto:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ token = match_token(string,
+ nfs_xprt_protocol_tokens, args);
+
+ switch (token) {
+ case Opt_xprt_udp:
+ mnt->flags &= ~NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
+ break;
+ case Opt_xprt_tcp:
+ mnt->flags |= NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ break;
+ case Opt_xprt_rdma:
+ /* vector side protocols to TCP */
+ mnt->flags |= NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
+ xprt_load_transport(string);
+ break;
+ default:
+ errors++;
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "transport protocol\n");
+ }
+ kfree(string);
+ break;
+ case Opt_mountproto:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ token = match_token(string,
+ nfs_xprt_protocol_tokens, args);
+ kfree(string);
+
+ switch (token) {
+ case Opt_xprt_udp:
+ mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
+ break;
+ case Opt_xprt_tcp:
+ mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
+ break;
+ case Opt_xprt_rdma: /* not used for side protocols */
+ default:
+ errors++;
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "transport protocol\n");
+ }
+ break;
+ case Opt_addr:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ nfs_parse_ip_address(string, strlen(string),
+ (struct sockaddr *)
+ &mnt->nfs_server.address,
+ &mnt->nfs_server.addrlen);
+ kfree(string);
+ break;
+ case Opt_clientaddr:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ kfree(mnt->client_address);
+ mnt->client_address = string;
+ break;
+ case Opt_mounthost:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ kfree(mnt->mount_server.hostname);
+ mnt->mount_server.hostname = string;
+ break;
+ case Opt_mountaddr:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ nfs_parse_ip_address(string, strlen(string),
+ (struct sockaddr *)
+ &mnt->mount_server.address,
+ &mnt->mount_server.addrlen);
+ kfree(string);
+ break;
+ case Opt_lookupcache:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ token = match_token(string,
+ nfs_lookupcache_tokens, args);
+ kfree(string);
+ switch (token) {
+ case Opt_lookupcache_all:
+ mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE);
+ break;
+ case Opt_lookupcache_positive:
+ mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE;
+ mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG;
+ break;
+ case Opt_lookupcache_none:
+ mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE;
+ break;
+ default:
+ errors++;
+ dfprintk(MOUNT, "NFS: invalid "
+ "lookupcache argument\n");
+ };
+ 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:
+ errors++;
+ dfprintk(MOUNT, "NFS: unrecognized mount option "
+ "'%s'\n", p);
+ }
+ }
+
+ if (errors > 0) {
+ dfprintk(MOUNT, "NFS: parsing encountered %d error%s\n",
+ errors, (errors == 1 ? "" : "s"));
+ if (!sloppy)
+ return 0;
+ }
+ return 1;
+
+out_nomem:
+ printk(KERN_INFO "NFS: not enough memory to parse option\n");
+ return 0;
+out_security_failure:
+ free_secdata(secdata);
+ printk(KERN_INFO "NFS: security options invalid: %d\n", rc);
+ return 0;
+}
+
+/*
+ * Use the remote server's MOUNT service to request the NFS file handle
+ * corresponding to the provided path.
+ */
+static int nfs_try_mount(struct nfs_parsed_mount_data *args,
+ struct nfs_fh *root_fh)
+{
+ struct nfs_mount_request request = {
+ .sap = (struct sockaddr *)
+ &args->mount_server.address,
+ .dirpath = args->nfs_server.export_path,
+ .protocol = args->mount_server.protocol,
+ .fh = root_fh,
+ .noresvport = args->flags & NFS_MOUNT_NORESVPORT,
+ };
+ int status;
+
+ if (args->mount_server.version == 0) {
+ if (args->flags & NFS_MOUNT_VER3)
+ args->mount_server.version = NFS_MNT3_VERSION;
+ else
+ args->mount_server.version = NFS_MNT_VERSION;
}
+ request.version = args->mount_server.version;
- /* Prepare the root filehandle */
- if (data->flags & NFS_MOUNT_VER3)
- mntfh->size = data->root.size;
+ if (args->mount_server.hostname)
+ request.hostname = args->mount_server.hostname;
else
- mntfh->size = NFS2_FHSIZE;
+ request.hostname = args->nfs_server.hostname;
- if (mntfh->size > sizeof(mntfh->data)) {
- dprintk("%s: invalid root filehandle\n", __FUNCTION__);
- return -EINVAL;
+ /*
+ * Construct the mount server's address.
+ */
+ if (args->mount_server.address.ss_family == AF_UNSPEC) {
+ memcpy(request.sap, &args->nfs_server.address,
+ args->nfs_server.addrlen);
+ args->mount_server.addrlen = args->nfs_server.addrlen;
+ }
+ request.salen = args->mount_server.addrlen;
+
+ /*
+ * autobind will be used if mount_server.port == 0
+ */
+ nfs_set_port(request.sap, args->mount_server.port);
+
+ /*
+ * Now ask the mount server to map our export path
+ * to a file handle.
+ */
+ status = nfs_mount(&request);
+ if (status == 0)
+ return 0;
+
+ dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n",
+ request.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
+ *
+ * For option strings, user space handles the following behaviors:
+ *
+ * + DNS: mapping server host name to IP address ("addr=" option)
+ *
+ * + failure mode: how to behave if a mount request can't be handled
+ * immediately ("fg/bg" option)
+ *
+ * + retry: how often to retry a mount request ("retry=" option)
+ *
+ * + breaking back: trying proto=udp after proto=tcp, v2 after v3,
+ * mountproto=tcp after mountproto=udp, and so on
+ */
+static int nfs_validate_mount_data(void *options,
+ struct nfs_parsed_mount_data *args,
+ struct nfs_fh *mntfh,
+ const char *dev_name)
+{
+ struct nfs_mount_data *data = (struct nfs_mount_data *)options;
+
+ if (data == NULL)
+ goto out_no_data;
+
+ args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP);
+ args->rsize = NFS_MAX_FILE_IO_SIZE;
+ args->wsize = NFS_MAX_FILE_IO_SIZE;
+ 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->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:
+ data->namlen = 0;
+ case 2:
+ data->bsize = 0;
+ case 3:
+ if (data->flags & NFS_MOUNT_VER3)
+ goto out_no_v3;
+ data->root.size = NFS2_FHSIZE;
+ memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
+ case 4:
+ if (data->flags & NFS_MOUNT_SECFLAVOUR)
+ goto out_no_sec;
+ case 5:
+ memset(data->context, 0, sizeof(data->context));
+ case 6:
+ if (data->flags & NFS_MOUNT_VER3) {
+ if (data->root.size > NFS3_FHSIZE || data->root.size == 0)
+ goto out_invalid_fh;
+ mntfh->size = data->root.size;
+ } else
+ mntfh->size = NFS2_FHSIZE;
+
+
+ memcpy(mntfh->data, data->root.data, mntfh->size);
+ if (mntfh->size < sizeof(mntfh->data))
+ memset(mntfh->data + mntfh->size, 0,
+ sizeof(mntfh->data) - mntfh->size);
+
+ /*
+ * Translate to nfs_parsed_mount_data, which nfs_fill_super
+ * can deal with.
+ */
+ args->flags = data->flags & NFS_MOUNT_FLAGMASK;
+ args->rsize = data->rsize;
+ args->wsize = data->wsize;
+ args->timeo = data->timeo;
+ args->retrans = data->retrans;
+ args->acregmin = data->acregmin;
+ args->acregmax = data->acregmax;
+ args->acdirmin = data->acdirmin;
+ args->acdirmax = data->acdirmax;
+
+ memcpy(&args->nfs_server.address, &data->addr,
+ sizeof(data->addr));
+ args->nfs_server.addrlen = sizeof(data->addr);
+ if (!nfs_verify_server_address((struct sockaddr *)
+ &args->nfs_server.address))
+ goto out_no_address;
+
+ if (!(data->flags & NFS_MOUNT_TCP))
+ args->nfs_server.protocol = XPRT_TRANSPORT_UDP;
+ /* N.B. caller will free nfs_server.hostname in all cases */
+ args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL);
+ args->namlen = data->namlen;
+ args->bsize = data->bsize;
+
+ if (data->flags & NFS_MOUNT_SECFLAVOUR)
+ args->auth_flavors[0] = data->pseudoflavor;
+ if (!args->nfs_server.hostname)
+ goto out_nomem;
+
+ /*
+ * The legacy version 6 binary mount data from userspace has a
+ * field used only to transport selinux information into the
+ * the kernel. To continue to support that functionality we
+ * have a touch of selinux knowledge here in the NFS code. The
+ * userspace code converted context=blah to just blah so we are
+ * converting back to the full string selinux understands.
+ */
+ if (data->context[0]){
+#ifdef CONFIG_SECURITY_SELINUX
+ int rc;
+ char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL);
+ if (!opts_str)
+ return -ENOMEM;
+ strcpy(opts_str, "context=");
+ data->context[NFS_MAX_CONTEXT_LEN] = '\0';
+ strcat(opts_str, &data->context[0]);
+ rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts);
+ kfree(opts_str);
+ if (rc)
+ return rc;
+#else
+ return -EINVAL;
+#endif
+ }
+
+ break;
+ default: {
+ int status;
+
+ if (nfs_parse_mount_options((char *)options, args) == 0)
+ return -EINVAL;
+
+ if (!nfs_verify_server_address((struct sockaddr *)
+ &args->nfs_server.address))
+ goto out_no_address;
+
+ nfs_set_port((struct sockaddr *)&args->nfs_server.address,
+ args->nfs_server.port);
+
+ 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;
+
+ if (status)
+ return status;
+
+ break;
+ }
}
- memcpy(mntfh->data, data->root.data, mntfh->size);
- if (mntfh->size < sizeof(mntfh->data))
- memset(mntfh->data + mntfh->size, 0,
- sizeof(mntfh->data) - mntfh->size);
+#ifndef CONFIG_NFS_V3
+ if (args->flags & NFS_MOUNT_VER3)
+ goto out_v3_not_compiled;
+#endif /* !CONFIG_NFS_V3 */
+
+ return 0;
+
+out_no_data:
+ dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n");
+ return -EINVAL;
+
+out_no_v3:
+ dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n",
+ data->version);
+ return -EINVAL;
+
+out_no_sec:
+ dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n");
+ return -EINVAL;
+
+#ifndef CONFIG_NFS_V3
+out_v3_not_compiled:
+ dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n");
+ return -EPROTONOSUPPORT;
+#endif /* !CONFIG_NFS_V3 */
+
+out_nomem:
+ dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n");
+ return -ENOMEM;
+
+out_no_address:
+ dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
+ return -EINVAL;
+
+out_invalid_fh:
+ dfprintk(MOUNT, "NFS: invalid root filehandle\n");
+ 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 || options4->version == 1)) ||
+ (nfsvers <= 3 && (!options || (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
*/
/*
* Finish setting up an NFS2/3 superblock
*/
-static void nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data)
+static void nfs_fill_super(struct super_block *sb,
+ struct nfs_parsed_mount_data *data)
{
struct nfs_server *server = NFS_SB(sb);
nfs_initialise_sb(sb);
}
-static int nfs_set_super(struct super_block *s, void *_server)
+static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags)
+{
+ const struct nfs_server *a = s->s_fs_info;
+ const struct rpc_clnt *clnt_a = a->client;
+ const struct rpc_clnt *clnt_b = b->client;
+
+ if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK))
+ goto Ebusy;
+ if (a->nfs_client != b->nfs_client)
+ goto Ebusy;
+ if (a->flags != b->flags)
+ goto Ebusy;
+ if (a->wsize != b->wsize)
+ goto Ebusy;
+ if (a->rsize != b->rsize)
+ goto Ebusy;
+ if (a->acregmin != b->acregmin)
+ goto Ebusy;
+ if (a->acregmax != b->acregmax)
+ goto Ebusy;
+ if (a->acdirmin != b->acdirmin)
+ goto Ebusy;
+ if (a->acdirmax != b->acdirmax)
+ goto Ebusy;
+ if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor)
+ goto Ebusy;
+ return 1;
+Ebusy:
+ return 0;
+}
+
+struct nfs_sb_mountdata {
+ struct nfs_server *server;
+ int mntflags;
+};
+
+static int nfs_set_super(struct super_block *s, void *data)
{
- struct nfs_server *server = _server;
+ struct nfs_sb_mountdata *sb_mntdata = data;
+ struct nfs_server *server = sb_mntdata->server;
int ret;
+ s->s_flags = sb_mntdata->mntflags;
s->s_fs_info = server;
ret = set_anon_super(s, server);
if (ret == 0)
return ret;
}
+static int nfs_compare_super_address(struct nfs_server *server1,
+ struct nfs_server *server2)
+{
+ struct sockaddr *sap1, *sap2;
+
+ sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr;
+ sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr;
+
+ if (sap1->sa_family != sap2->sa_family)
+ return 0;
+
+ switch (sap1->sa_family) {
+ case AF_INET: {
+ struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1;
+ struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2;
+ if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr)
+ return 0;
+ if (sin1->sin_port != sin2->sin_port)
+ return 0;
+ break;
+ }
+ case AF_INET6: {
+ struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1;
+ struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2;
+ if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
+ return 0;
+ if (sin1->sin6_port != sin2->sin6_port)
+ return 0;
+ break;
+ }
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
static int nfs_compare_super(struct super_block *sb, void *data)
{
- struct nfs_server *server = data, *old = NFS_SB(sb);
+ struct nfs_sb_mountdata *sb_mntdata = data;
+ struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb);
+ int mntflags = sb_mntdata->mntflags;
- if (old->nfs_client != server->nfs_client)
+ if (!nfs_compare_super_address(old, server))
+ return 0;
+ /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */
+ if (old->flags & NFS_MOUNT_UNSHARED)
return 0;
if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0)
return 0;
- return 1;
+ return nfs_compare_mount_options(sb, server, mntflags);
+}
+
+static int nfs_bdi_register(struct nfs_server *server)
+{
+ return bdi_register_dev(&server->backing_dev_info, server->s_dev);
}
static int nfs_get_sb(struct file_system_type *fs_type,
{
struct nfs_server *server = NULL;
struct super_block *s;
- struct nfs_fh mntfh;
- struct nfs_mount_data *data = raw_data;
+ struct nfs_parsed_mount_data *data;
+ struct nfs_fh *mntfh;
struct dentry *mntroot;
- int error;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
+ struct nfs_sb_mountdata sb_mntdata = {
+ .mntflags = flags,
+ };
+ int error = -ENOMEM;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL);
+ if (data == NULL || mntfh == NULL)
+ goto out_free_fh;
+
+ security_init_mnt_opts(&data->lsm_opts);
/* Validate the mount data */
- error = nfs_validate_mount_data(data, &mntfh);
+ error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name);
if (error < 0)
- return error;
+ goto out;
/* Get a volume representation */
- server = nfs_create_server(data, &mntfh);
+ server = nfs_create_server(data, mntfh);
if (IS_ERR(server)) {
error = PTR_ERR(server);
- goto out_err_noserver;
+ goto out;
}
+ sb_mntdata.server = server;
+
+ if (server->flags & NFS_MOUNT_UNSHARED)
+ compare_super = NULL;
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
+ s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_err_nosb;
if (s->s_fs_info != server) {
nfs_free_server(server);
server = NULL;
+ } else {
+ error = nfs_bdi_register(server);
+ if (error)
+ goto error_splat_super;
}
if (!s->s_root) {
/* initial superblock/root creation */
- s->s_flags = flags;
nfs_fill_super(s, data);
+ nfs_fscache_get_super_cookie(s, data);
}
- mntroot = nfs_get_root(s, &mntfh);
+ mntroot = nfs_get_root(s, mntfh);
if (IS_ERR(mntroot)) {
error = PTR_ERR(mntroot);
goto error_splat_super;
}
+ error = security_sb_set_mnt_opts(s, &data->lsm_opts);
+ if (error)
+ goto error_splat_root;
+
s->s_flags |= MS_ACTIVE;
mnt->mnt_sb = s;
mnt->mnt_root = mntroot;
- return 0;
+ error = 0;
+
+out:
+ kfree(data->nfs_server.hostname);
+ kfree(data->mount_server.hostname);
+ kfree(data->fscache_uniq);
+ security_free_mnt_opts(&data->lsm_opts);
+out_free_fh:
+ kfree(mntfh);
+ kfree(data);
+ return error;
out_err_nosb:
nfs_free_server(server);
-out_err_noserver:
- return error;
+ goto out;
+error_splat_root:
+ dput(mntroot);
error_splat_super:
- up_write(&s->s_umount);
- deactivate_super(s);
- return error;
+ deactivate_locked_super(s);
+ goto out;
}
/*
{
struct nfs_server *server = NFS_SB(s);
+ bdi_unregister(&server->backing_dev_info);
kill_anon_super(s);
+ nfs_fscache_release_super_cookie(s);
nfs_free_server(server);
}
struct super_block *s;
struct nfs_server *server;
struct dentry *mntroot;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
+ struct nfs_sb_mountdata sb_mntdata = {
+ .mntflags = flags,
+ };
int error;
dprintk("--> nfs_xdev_get_sb()\n");
error = PTR_ERR(server);
goto out_err_noserver;
}
+ sb_mntdata.server = server;
+
+ if (server->flags & NFS_MOUNT_UNSHARED)
+ compare_super = NULL;
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_err_nosb;
if (s->s_fs_info != server) {
nfs_free_server(server);
server = NULL;
+ } else {
+ error = nfs_bdi_register(server);
+ if (error)
+ goto error_splat_super;
}
if (!s->s_root) {
/* initial superblock/root creation */
- s->s_flags = flags;
nfs_clone_super(s, data->sb);
}
error = PTR_ERR(mntroot);
goto error_splat_super;
}
+ if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) {
+ dput(mntroot);
+ error = -ESTALE;
+ goto error_splat_super;
+ }
s->s_flags |= MS_ACTIVE;
mnt->mnt_sb = s;
mnt->mnt_root = mntroot;
+ /* clone any lsm security options from the parent to the new sb */
+ security_sb_clone_mnt_opts(data->sb, s);
+
dprintk("<-- nfs_xdev_get_sb() = 0\n");
return 0;
return error;
error_splat_super:
- up_write(&s->s_umount);
- deactivate_super(s);
+ deactivate_locked_super(s);
dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
return error;
}
nfs_initialise_sb(sb);
}
-static void *nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
+/*
+ * Validate NFSv4 mount options
+ */
+static int nfs4_validate_mount_data(void *options,
+ struct nfs_parsed_mount_data *args,
+ const char *dev_name)
{
- void *p = NULL;
-
- if (!src->len)
- return ERR_PTR(-EINVAL);
- if (src->len < maxlen)
- maxlen = src->len;
- if (dst == NULL) {
- p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
- if (p == NULL)
- return ERR_PTR(-ENOMEM);
- }
- if (copy_from_user(dst, src->data, maxlen)) {
- kfree(p);
- return ERR_PTR(-EFAULT);
+ struct sockaddr_in *ap;
+ struct nfs4_mount_data *data = (struct nfs4_mount_data *)options;
+ char *c;
+
+ if (data == NULL)
+ goto out_no_data;
+
+ args->rsize = NFS_MAX_FILE_IO_SIZE;
+ args->wsize = NFS_MAX_FILE_IO_SIZE;
+ 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->auth_flavors[0] = RPC_AUTH_UNIX;
+ args->auth_flavor_len = 0;
+
+ switch (data->version) {
+ case 1:
+ ap = (struct sockaddr_in *)&args->nfs_server.address;
+ if (data->host_addrlen > sizeof(args->nfs_server.address))
+ goto out_no_address;
+ if (data->host_addrlen == 0)
+ goto out_no_address;
+ args->nfs_server.addrlen = data->host_addrlen;
+ if (copy_from_user(ap, data->host_addr, data->host_addrlen))
+ return -EFAULT;
+ if (!nfs_verify_server_address((struct sockaddr *)
+ &args->nfs_server.address))
+ goto out_no_address;
+
+ 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;
+ }
+
+ c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN);
+ if (IS_ERR(c))
+ return PTR_ERR(c);
+ args->nfs_server.hostname = c;
+
+ c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN);
+ if (IS_ERR(c))
+ return PTR_ERR(c);
+ args->nfs_server.export_path = c;
+ dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c);
+
+ c = strndup_user(data->client_addr.data, 16);
+ if (IS_ERR(c))
+ return PTR_ERR(c);
+ args->client_address = c;
+
+ /*
+ * Translate to nfs_parsed_mount_data, which nfs4_fill_super
+ * can deal with.
+ */
+
+ args->flags = data->flags & NFS4_MOUNT_FLAGMASK;
+ args->rsize = data->rsize;
+ args->wsize = data->wsize;
+ args->timeo = data->timeo;
+ args->retrans = data->retrans;
+ args->acregmin = data->acregmin;
+ args->acregmax = data->acregmax;
+ args->acdirmin = data->acdirmin;
+ args->acdirmax = data->acdirmax;
+ args->nfs_server.protocol = data->proto;
+ nfs_validate_transport_protocol(args);
+
+ break;
+ default: {
+ int status;
+
+ if (nfs_parse_mount_options((char *)options, args) == 0)
+ return -EINVAL;
+
+ if (!nfs_verify_server_address((struct sockaddr *)
+ &args->nfs_server.address))
+ return -EINVAL;
+
+ nfs_set_port((struct sockaddr *)&args->nfs_server.address,
+ args->nfs_server.port);
+
+ nfs_validate_transport_protocol(args);
+
+ 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;
+ }
}
- dst[maxlen] = '\0';
- return dst;
+
+ return 0;
+
+out_no_data:
+ dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n");
+ return -EINVAL;
+
+out_inval_auth:
+ dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n",
+ data->auth_flavourlen);
+ return -EINVAL;
+
+out_no_address:
+ dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");
+ return -EINVAL;
+
+out_no_client_address:
+ dfprintk(MOUNT, "NFS4: mount program didn't pass callback address\n");
+ return -EINVAL;
}
/*
static int nfs4_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
- struct nfs4_mount_data *data = raw_data;
+ struct nfs_parsed_mount_data *data;
struct super_block *s;
struct nfs_server *server;
- struct sockaddr_in addr;
- rpc_authflavor_t authflavour;
- struct nfs_fh mntfh;
+ struct nfs_fh *mntfh;
struct dentry *mntroot;
- char *mntpath = NULL, *hostname = NULL, ip_addr[16];
- void *p;
- int error;
-
- if (data == NULL) {
- dprintk("%s: missing data argument\n", __FUNCTION__);
- return -EINVAL;
- }
- if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
- dprintk("%s: bad mount version\n", __FUNCTION__);
- return -EINVAL;
- }
-
- /* We now require that the mount process passes the remote address */
- if (data->host_addrlen != sizeof(addr))
- return -EINVAL;
-
- if (copy_from_user(&addr, data->host_addr, sizeof(addr)))
- return -EFAULT;
-
- if (addr.sin_family != AF_INET ||
- addr.sin_addr.s_addr == INADDR_ANY
- ) {
- dprintk("%s: mount program didn't pass remote IP address!\n",
- __FUNCTION__);
- return -EINVAL;
- }
- /* RFC3530: The default port for NFS is 2049 */
- if (addr.sin_port == 0)
- addr.sin_port = htons(NFS_PORT);
-
- /* Grab the authentication type */
- authflavour = RPC_AUTH_UNIX;
- if (data->auth_flavourlen != 0) {
- if (data->auth_flavourlen != 1) {
- dprintk("%s: Invalid number of RPC auth flavours %d.\n",
- __FUNCTION__, data->auth_flavourlen);
- error = -EINVAL;
- goto out_err_noserver;
- }
-
- if (copy_from_user(&authflavour, data->auth_flavours,
- sizeof(authflavour))) {
- error = -EFAULT;
- goto out_err_noserver;
- }
- }
-
- p = nfs_copy_user_string(NULL, &data->hostname, 256);
- if (IS_ERR(p))
- goto out_err;
- hostname = p;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
+ struct nfs_sb_mountdata sb_mntdata = {
+ .mntflags = flags,
+ };
+ int error = -ENOMEM;
- p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
- if (IS_ERR(p))
- goto out_err;
- mntpath = p;
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL);
+ if (data == NULL || mntfh == NULL)
+ goto out_free_fh;
- dprintk("MNTPATH: %s\n", mntpath);
+ security_init_mnt_opts(&data->lsm_opts);
- p = nfs_copy_user_string(ip_addr, &data->client_addr,
- sizeof(ip_addr) - 1);
- if (IS_ERR(p))
- goto out_err;
+ /* Validate the mount data */
+ error = nfs4_validate_mount_data(raw_data, data, dev_name);
+ if (error < 0)
+ goto out;
/* Get a volume representation */
- server = nfs4_create_server(data, hostname, &addr, mntpath, ip_addr,
- authflavour, &mntfh);
+ server = nfs4_create_server(data, mntfh);
if (IS_ERR(server)) {
error = PTR_ERR(server);
- goto out_err_noserver;
+ goto out;
}
+ sb_mntdata.server = server;
+
+ if (server->flags & NFS4_MOUNT_UNSHARED)
+ compare_super = NULL;
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
+ s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_free;
if (s->s_fs_info != server) {
nfs_free_server(server);
server = NULL;
+ } else {
+ error = nfs_bdi_register(server);
+ if (error)
+ goto error_splat_super;
}
if (!s->s_root) {
/* initial superblock/root creation */
- s->s_flags = flags;
nfs4_fill_super(s);
+ nfs_fscache_get_super_cookie(s, data);
}
- mntroot = nfs4_get_root(s, &mntfh);
+ mntroot = nfs4_get_root(s, mntfh);
if (IS_ERR(mntroot)) {
error = PTR_ERR(mntroot);
goto error_splat_super;
}
+ error = security_sb_set_mnt_opts(s, &data->lsm_opts);
+ if (error)
+ goto error_splat_root;
+
s->s_flags |= MS_ACTIVE;
mnt->mnt_sb = s;
mnt->mnt_root = mntroot;
- kfree(mntpath);
- kfree(hostname);
- return 0;
-
-out_err:
- error = PTR_ERR(p);
- goto out_err_noserver;
+ error = 0;
+
+out:
+ kfree(data->client_address);
+ kfree(data->nfs_server.export_path);
+ kfree(data->nfs_server.hostname);
+ kfree(data->fscache_uniq);
+ security_free_mnt_opts(&data->lsm_opts);
+out_free_fh:
+ kfree(mntfh);
+ kfree(data);
+ return error;
out_free:
nfs_free_server(server);
-out_err_noserver:
- kfree(mntpath);
- kfree(hostname);
- return error;
+ goto out;
+error_splat_root:
+ dput(mntroot);
error_splat_super:
- up_write(&s->s_umount);
- deactivate_super(s);
- goto out_err_noserver;
+ deactivate_locked_super(s);
+ goto out;
}
static void nfs4_kill_super(struct super_block *sb)
{
struct nfs_server *server = NFS_SB(sb);
- nfs_return_all_delegations(sb);
+ nfs_super_return_all_delegations(sb);
kill_anon_super(sb);
nfs4_renewd_prepare_shutdown(server);
+ nfs_fscache_release_super_cookie(sb);
nfs_free_server(server);
}
struct super_block *s;
struct nfs_server *server;
struct dentry *mntroot;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
+ struct nfs_sb_mountdata sb_mntdata = {
+ .mntflags = flags,
+ };
int error;
dprintk("--> nfs4_xdev_get_sb()\n");
error = PTR_ERR(server);
goto out_err_noserver;
}
+ sb_mntdata.server = server;
+
+ if (server->flags & NFS4_MOUNT_UNSHARED)
+ compare_super = NULL;
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_err_nosb;
if (s->s_fs_info != server) {
nfs_free_server(server);
server = NULL;
+ } else {
+ error = nfs_bdi_register(server);
+ if (error)
+ goto error_splat_super;
}
if (!s->s_root) {
/* initial superblock/root creation */
- s->s_flags = flags;
nfs4_clone_super(s, data->sb);
}
error = PTR_ERR(mntroot);
goto error_splat_super;
}
+ if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) {
+ dput(mntroot);
+ error = -ESTALE;
+ goto error_splat_super;
+ }
s->s_flags |= MS_ACTIVE;
mnt->mnt_sb = s;
mnt->mnt_root = mntroot;
+ security_sb_clone_mnt_opts(data->sb, s);
+
dprintk("<-- nfs4_xdev_get_sb() = 0\n");
return 0;
return error;
error_splat_super:
- up_write(&s->s_umount);
- deactivate_super(s);
+ deactivate_locked_super(s);
dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error);
return error;
}
struct nfs_server *server;
struct dentry *mntroot;
struct nfs_fh mntfh;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
+ struct nfs_sb_mountdata sb_mntdata = {
+ .mntflags = flags,
+ };
int error;
dprintk("--> nfs4_referral_get_sb()\n");
error = PTR_ERR(server);
goto out_err_noserver;
}
+ sb_mntdata.server = server;
+
+ if (server->flags & NFS4_MOUNT_UNSHARED)
+ compare_super = NULL;
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_err_nosb;
if (s->s_fs_info != server) {
nfs_free_server(server);
server = NULL;
+ } else {
+ error = nfs_bdi_register(server);
+ if (error)
+ goto error_splat_super;
}
if (!s->s_root) {
/* initial superblock/root creation */
- s->s_flags = flags;
nfs4_fill_super(s);
}
error = PTR_ERR(mntroot);
goto error_splat_super;
}
+ if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) {
+ dput(mntroot);
+ error = -ESTALE;
+ goto error_splat_super;
+ }
s->s_flags |= MS_ACTIVE;
mnt->mnt_sb = s;
mnt->mnt_root = mntroot;
+ security_sb_clone_mnt_opts(data->sb, s);
+
dprintk("<-- nfs4_referral_get_sb() = 0\n");
return 0;
return error;
error_splat_super:
- up_write(&s->s_umount);
- deactivate_super(s);
+ deactivate_locked_super(s);
dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
return error;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff