*
* 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.
*
* Split from inode.c by David Howells <dhowells@redhat.com>
*
+ * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a
+ * particular server are held in the same superblock
+ * - NFS superblocks can have several effective roots to the dentry tree
+ * - directory type roots are spliced into the tree when a path from one root reaches the root
+ * of another (see nfs_lookup())
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#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/smp_lock.h>
#include <linux/seq_file.h>
#include <linux/mount.h>
+#include <linux/mnt_namespace.h>
+#include <linux/namei.h>
#include <linux/nfs_idmap.h>
#include <linux/vfs.h>
#include <linux/inet.h>
+#include <linux/in6.h>
+#include <linux/slab.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
-/* Maximum number of readahead requests
- * FIXME: this should really be a sysctl so that users may tune it to suit
- * their needs. People that do NFS over a slow network, might for
- * instance want to reduce it to something closer to 1 for improved
- * interactive response.
- */
-#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
+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_v4,
+ 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,
+ Opt_minorversion,
+
+ /* 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
+};
-/*
- * RPC cruft for NFS
- */
-static struct rpc_version * nfs_version[] = {
- NULL,
- NULL,
- &nfs_version2,
-#if defined(CONFIG_NFS_V3)
- &nfs_version3,
-#elif defined(CONFIG_NFS_V4)
- NULL,
-#endif
-#if defined(CONFIG_NFS_V4)
- &nfs_version4,
-#endif
+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_v4, "v4" },
+ { 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=%s" },
+ { Opt_rsize, "rsize=%s" },
+ { Opt_wsize, "wsize=%s" },
+ { Opt_bsize, "bsize=%s" },
+ { Opt_timeo, "timeo=%s" },
+ { Opt_retrans, "retrans=%s" },
+ { Opt_acregmin, "acregmin=%s" },
+ { Opt_acregmax, "acregmax=%s" },
+ { Opt_acdirmin, "acdirmin=%s" },
+ { Opt_acdirmax, "acdirmax=%s" },
+ { Opt_actimeo, "actimeo=%s" },
+ { Opt_namelen, "namlen=%s" },
+ { Opt_mountport, "mountport=%s" },
+ { Opt_mountvers, "mountvers=%s" },
+ { Opt_nfsvers, "nfsvers=%s" },
+ { Opt_nfsvers, "vers=%s" },
+ { Opt_minorversion, "minorversion=%s" },
+
+ { 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_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma,
+
+ Opt_xprt_err
+};
+
+static const match_table_t nfs_xprt_protocol_tokens = {
+ { Opt_xprt_udp, "udp" },
+ { Opt_xprt_udp6, "udp6" },
+ { Opt_xprt_tcp, "tcp" },
+ { Opt_xprt_tcp6, "tcp6" },
+ { Opt_xprt_rdma, "rdma" },
+
+ { Opt_xprt_err, NULL }
};
-static struct rpc_program nfs_program = {
- .name = "nfs",
- .number = NFS_PROGRAM,
- .nrvers = ARRAY_SIZE(nfs_version),
- .version = nfs_version,
- .stats = &nfs_rpcstat,
- .pipe_dir_name = "/nfs",
+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
};
-struct rpc_stat nfs_rpcstat = {
- .program = &nfs_program
+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,
-#ifdef CONFIG_NFS_V3_ACL
-static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
-static struct rpc_version * nfsacl_version[] = {
- [3] = &nfsacl_version3,
+ Opt_lookupcache_err
};
-struct rpc_program nfsacl_program = {
- .name = "nfsacl",
- .number = NFS_ACL_PROGRAM,
- .nrvers = ARRAY_SIZE(nfsacl_version),
- .version = nfsacl_version,
- .stats = &nfsacl_rpcstat,
+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 }
};
-#endif /* CONFIG_NFS_V3_ACL */
-static void nfs_umount_begin(struct vfsmount *, int);
+
+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_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *);
-static int nfs_clone_nfs_sb(struct file_system_type *fs_type,
+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_put_super(struct super_block *);
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,
.name = "nfs",
.get_sb = nfs_get_sb,
.kill_sb = nfs_kill_super,
- .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+ .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-struct file_system_type clone_nfs_fs_type = {
+struct file_system_type nfs_xdev_fs_type = {
.owner = THIS_MODULE,
.name = "nfs",
- .get_sb = nfs_clone_nfs_sb,
+ .get_sb = nfs_xdev_get_sb,
.kill_sb = nfs_kill_super,
- .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+ .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,
+ .put_super = nfs_put_super,
.statfs = nfs_statfs,
.clear_inode = nfs_clear_inode,
.umount_begin = nfs_umount_begin,
.show_options = nfs_show_options,
.show_stats = nfs_show_stats,
+ .remount_fs = nfs_remount,
};
#ifdef CONFIG_NFS_V4
+static int nfs4_validate_text_mount_data(void *options,
+ struct nfs_parsed_mount_data *args, const char *dev_name);
+static int nfs4_try_mount(int flags, const char *dev_name,
+ struct nfs_parsed_mount_data *data, struct vfsmount *mnt);
static int nfs4_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
-static int nfs_clone_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
-static int nfs_referral_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static int nfs4_remote_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static int nfs4_xdev_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static int nfs4_referral_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
static void nfs4_kill_super(struct super_block *sb);
static struct file_system_type nfs4_fs_type = {
.name = "nfs4",
.get_sb = nfs4_get_sb,
.kill_sb = nfs4_kill_super,
- .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+ .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+};
+
+static struct file_system_type nfs4_remote_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "nfs4",
+ .get_sb = nfs4_remote_get_sb,
+ .kill_sb = nfs4_kill_super,
+ .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+};
+
+struct file_system_type nfs4_xdev_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "nfs4",
+ .get_sb = nfs4_xdev_get_sb,
+ .kill_sb = nfs4_kill_super,
+ .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-struct file_system_type clone_nfs4_fs_type = {
+static struct file_system_type nfs4_remote_referral_fs_type = {
.owner = THIS_MODULE,
.name = "nfs4",
- .get_sb = nfs_clone_nfs4_sb,
+ .get_sb = nfs4_remote_referral_get_sb,
.kill_sb = nfs4_kill_super,
- .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+ .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-struct file_system_type nfs_referral_nfs4_fs_type = {
+struct file_system_type nfs4_referral_fs_type = {
.owner = THIS_MODULE,
.name = "nfs4",
- .get_sb = nfs_referral_nfs4_sb,
+ .get_sb = nfs4_referral_get_sb,
.kill_sb = nfs4_kill_super,
- .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+ .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,
+ .put_super = nfs_put_super,
.statfs = nfs_statfs,
.clear_inode = nfs4_clear_inode,
.umount_begin = nfs_umount_begin,
.show_options = nfs_show_options,
.show_stats = nfs_show_stats,
+ .remount_fs = nfs_remount,
};
#endif
-static const int nfs_set_port_min = 0;
-static const int nfs_set_port_max = 65535;
-
-static int param_set_port(const char *val, struct kernel_param *kp)
-{
- char *endp;
- int num = simple_strtol(val, &endp, 0);
- if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
- return -EINVAL;
- *((int *)kp->arg) = num;
- return 0;
-}
-
-module_param_call(callback_tcpport, param_set_port, param_get_int,
- &nfs_callback_set_tcpport, 0644);
-
-static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
-{
- char *endp;
- int num = simple_strtol(val, &endp, 0);
- int jif = num * HZ;
- if (endp == val || *endp || num < 0 || jif < num)
- return -EINVAL;
- *((int *)kp->arg) = jif;
- return 0;
-}
-
-module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
- &nfs_idmap_cache_timeout, 0644);
+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
+ 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)
{
+ 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
*/
static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
- struct super_block *sb = dentry->d_sb;
- struct nfs_server *server = NFS_SB(sb);
+ struct nfs_server *server = NFS_SB(dentry->d_sb);
unsigned char blockbits;
unsigned long blockres;
- struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
+ struct nfs_fh *fh = NFS_FH(dentry->d_inode);
struct nfs_fattr fattr;
struct nfs_fsstat res = {
.fattr = &fattr,
};
int error;
- lock_kernel();
-
- error = server->rpc_ops->statfs(server, rootfh, &res);
- buf->f_type = NFS_SUPER_MAGIC;
+ error = server->nfs_client->rpc_ops->statfs(server, fh, &res);
if (error < 0)
goto out_err;
+ buf->f_type = NFS_SUPER_MAGIC;
/*
* Current versions of glibc do not correctly handle the
* case where f_frsize != f_bsize. Eventually we want to
* report the value of wtmult in this field.
*/
- buf->f_frsize = sb->s_blocksize;
+ buf->f_frsize = dentry->d_sb->s_blocksize;
/*
* On most *nix systems, f_blocks, f_bfree, and f_bavail
* thus historically Linux's sys_statfs reports these
* fields in units of f_bsize.
*/
- buf->f_bsize = sb->s_blocksize;
- blockbits = sb->s_blocksize_bits;
+ buf->f_bsize = dentry->d_sb->s_blocksize;
+ blockbits = dentry->d_sb->s_blocksize_bits;
blockres = (1 << blockbits) - 1;
buf->f_blocks = (res.tbytes + blockres) >> blockbits;
buf->f_bfree = (res.fbytes + blockres) >> blockbits;
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;
}
+/*
+ * Map the security flavour number to a name
+ */
static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour)
{
- static struct {
+ static const struct {
rpc_authflavor_t flavour;
const char *str;
} sec_flavours[] = {
{ 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_netid(struct seq_file *m, struct nfs_server *nfss,
+ int showdefaults)
+{
+ struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address;
+
+ seq_printf(m, ",mountproto=");
+ switch (sap->sa_family) {
+ case AF_INET:
+ switch (nfss->mountd_protocol) {
+ case IPPROTO_UDP:
+ seq_printf(m, RPCBIND_NETID_UDP);
+ break;
+ case IPPROTO_TCP:
+ seq_printf(m, RPCBIND_NETID_TCP);
+ break;
+ default:
+ if (showdefaults)
+ seq_printf(m, "auto");
+ }
+ break;
+ case AF_INET6:
+ switch (nfss->mountd_protocol) {
+ case IPPROTO_UDP:
+ seq_printf(m, RPCBIND_NETID_UDP6);
+ break;
+ case IPPROTO_TCP:
+ seq_printf(m, RPCBIND_NETID_TCP6);
+ break;
+ default:
+ if (showdefaults)
+ seq_printf(m, "auto");
+ }
+ break;
+ default:
+ if (showdefaults)
+ seq_printf(m, "auto");
+ }
+}
+
+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=%pI6c", &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);
+
+ nfs_show_mountd_netid(m, nfss, showdefaults);
+}
+
/*
* 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 struct proc_nfs_info {
+ static const struct proc_nfs_info {
int flag;
- char *str;
- char *nostr;
+ const char *str;
+ const char *nostr;
} nfs_info[] = {
{ NFS_MOUNT_SOFT, ",soft", ",hard" },
- { NFS_MOUNT_INTR, ",intr", "" },
+ { 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 }
};
- struct proc_nfs_info *nfs_infop;
- char buf[12];
- char *proto;
-
- seq_printf(m, ",vers=%d", nfss->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);
+ const struct proc_nfs_info *nfs_infop;
+ struct nfs_client *clp = nfss->nfs_client;
+ 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 * nfss->retrans_timeo / HZ);
- seq_printf(m, ",retrans=%u", nfss->retrans_count);
+ seq_printf(m, ",proto=%s",
+ rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID));
+ 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->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->rpc_ops->version == 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 traversals
+ * 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)
{
struct nfs_server *server;
- struct rpc_clnt *rpc;
+ struct rpc_clnt *rpc;
- shrink_submounts(vfsmnt, &nfs_automount_list);
- if (!(flags & MNT_FORCE))
- return;
+ server = NFS_SB(sb);
/* -EIO all pending I/O */
- server = NFS_SB(vfsmnt->mnt_sb);
- rpc = server->client;
+ rpc = server->client_acl;
if (!IS_ERR(rpc))
rpc_killall_tasks(rpc);
- rpc = server->client_acl;
+ rpc = server->client;
if (!IS_ERR(rpc))
rpc_killall_tasks(rpc);
}
-/*
- * Obtain the root inode of the file system.
- */
-static struct inode *
-nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
+static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(unsigned int version)
{
- struct nfs_server *server = NFS_SB(sb);
- int error;
-
- error = server->rpc_ops->getroot(server, rootfh, fsinfo);
- if (error < 0) {
- dprintk("nfs_get_root: getattr error = %d\n", -error);
- return ERR_PTR(error);
+ struct nfs_parsed_mount_data *data;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (data) {
+ data->acregmin = NFS_DEF_ACREGMIN;
+ data->acregmax = NFS_DEF_ACREGMAX;
+ data->acdirmin = NFS_DEF_ACDIRMIN;
+ data->acdirmax = NFS_DEF_ACDIRMAX;
+ data->mount_server.port = NFS_UNSPEC_PORT;
+ data->nfs_server.port = NFS_UNSPEC_PORT;
+ data->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ data->auth_flavors[0] = RPC_AUTH_UNIX;
+ data->auth_flavor_len = 1;
+ data->version = version;
+ data->minorversion = 0;
}
-
- server->fsid = fsinfo->fattr->fsid;
- return nfs_fhget(sb, rootfh, fsinfo->fattr);
+ return data;
}
/*
- * Do NFS version-independent mount processing, and sanity checking
+ * 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_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
+static int nfs_verify_server_address(struct sockaddr *addr)
{
- struct nfs_server *server;
- struct inode *root_inode;
- struct nfs_fattr fattr;
- struct nfs_fsinfo fsinfo = {
- .fattr = &fattr,
- };
- struct nfs_pathconf pathinfo = {
- .fattr = &fattr,
- };
- int no_root_error = 0;
- unsigned long max_rpc_payload;
-
- /* We probably want something more informative here */
- snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
-
- server = NFS_SB(sb);
-
- sb->s_magic = NFS_SUPER_MAGIC;
-
- server->io_stats = nfs_alloc_iostats();
- if (server->io_stats == NULL)
- return -ENOMEM;
-
- root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
- /* Did getting the root inode fail? */
- if (IS_ERR(root_inode)) {
- no_root_error = PTR_ERR(root_inode);
- goto out_no_root;
+ switch (addr->sa_family) {
+ case AF_INET: {
+ struct sockaddr_in *sa = (struct sockaddr_in *)addr;
+ return sa->sin_addr.s_addr != htonl(INADDR_ANY);
}
- sb->s_root = d_alloc_root(root_inode);
- if (!sb->s_root) {
- no_root_error = -ENOMEM;
- goto out_no_root;
+ case AF_INET6: {
+ struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr;
+ return !ipv6_addr_any(sa);
}
- sb->s_root->d_op = server->rpc_ops->dentry_ops;
-
- /* mount time stamp, in seconds */
- server->mount_time = jiffies;
-
- /* Get some general file system info */
- if (server->namelen == 0 &&
- server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
- server->namelen = pathinfo.max_namelen;
- /* Work out a lot of parameters */
- if (server->rsize == 0)
- server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
- if (server->wsize == 0)
- server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
-
- if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
- server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
- if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
- server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
-
- max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
- if (server->rsize > max_rpc_payload)
- server->rsize = max_rpc_payload;
- if (server->rsize > NFS_MAX_FILE_IO_SIZE)
- server->rsize = NFS_MAX_FILE_IO_SIZE;
- server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-
- if (server->wsize > max_rpc_payload)
- server->wsize = max_rpc_payload;
- if (server->wsize > NFS_MAX_FILE_IO_SIZE)
- server->wsize = NFS_MAX_FILE_IO_SIZE;
- server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-
- if (sb->s_blocksize == 0)
- sb->s_blocksize = nfs_block_bits(server->wsize,
- &sb->s_blocksize_bits);
- server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
-
- server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
- if (server->dtsize > PAGE_CACHE_SIZE)
- server->dtsize = PAGE_CACHE_SIZE;
- if (server->dtsize > server->rsize)
- server->dtsize = server->rsize;
-
- if (server->flags & NFS_MOUNT_NOAC) {
- server->acregmin = server->acregmax = 0;
- server->acdirmin = server->acdirmax = 0;
- sb->s_flags |= MS_SYNCHRONOUS;
}
- server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
-
- nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
-
- server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
- server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
- /* We're airborne Set socket buffersize */
- rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
+ dfprintk(MOUNT, "NFS: Invalid IP address specified\n");
return 0;
- /* Yargs. It didn't work out. */
-out_no_root:
- dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
- if (!IS_ERR(root_inode))
- iput(root_inode);
- return no_root_error;
}
/*
- * Initialise the timeout values for a connection
+ * Select between a default port value and a user-specified port value.
+ * If a zero value is set, then autobind will be used.
*/
-static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
+static void nfs_set_port(struct sockaddr *sap, int *port,
+ const unsigned short default_port)
{
- to->to_initval = timeo * HZ / 10;
- to->to_retries = retrans;
- if (!to->to_retries)
- to->to_retries = 2;
-
- switch (proto) {
- case IPPROTO_TCP:
- if (!to->to_initval)
- to->to_initval = 60 * HZ;
- if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
- to->to_initval = NFS_MAX_TCP_TIMEOUT;
- to->to_increment = to->to_initval;
- to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
- to->to_exponential = 0;
- break;
- case IPPROTO_UDP:
- default:
- if (!to->to_initval)
- to->to_initval = 11 * HZ / 10;
- if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
- to->to_initval = NFS_MAX_UDP_TIMEOUT;
- to->to_maxval = NFS_MAX_UDP_TIMEOUT;
- to->to_exponential = 1;
- break;
- }
+ if (*port == NFS_UNSPEC_PORT)
+ *port = default_port;
+
+ rpc_set_port(sap, *port);
}
/*
- * Create an RPC client handle.
+ * Sanity check the NFS transport protocol.
+ *
*/
-static struct rpc_clnt *
-nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
+static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt)
{
- struct rpc_timeout timeparms;
- struct rpc_xprt *xprt = NULL;
- struct rpc_clnt *clnt = NULL;
- int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
-
- nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
-
- server->retrans_timeo = timeparms.to_initval;
- server->retrans_count = timeparms.to_retries;
-
- /* create transport and client */
- xprt = xprt_create_proto(proto, &server->addr, &timeparms);
- if (IS_ERR(xprt)) {
- dprintk("%s: cannot create RPC transport. Error = %ld\n",
- __FUNCTION__, PTR_ERR(xprt));
- return (struct rpc_clnt *)xprt;
- }
- clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
- server->rpc_ops->version, data->pseudoflavor);
- if (IS_ERR(clnt)) {
- dprintk("%s: cannot create RPC client. Error = %ld\n",
- __FUNCTION__, PTR_ERR(xprt));
- goto out_fail;
+ 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;
}
-
- clnt->cl_intr = 1;
- clnt->cl_softrtry = 1;
-
- return clnt;
-
-out_fail:
- return clnt;
}
/*
- * Clone a server record
+ * For text based NFSv2/v3 mounts, the mount protocol transport default
+ * settings should depend upon the specified NFS transport.
*/
-static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *data)
+static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt)
{
- struct nfs_server *server = NFS_SB(sb);
- struct nfs_server *parent = NFS_SB(data->sb);
- struct inode *root_inode;
- struct nfs_fsinfo fsinfo;
- void *err = ERR_PTR(-ENOMEM);
-
- sb->s_op = data->sb->s_op;
- sb->s_blocksize = data->sb->s_blocksize;
- sb->s_blocksize_bits = data->sb->s_blocksize_bits;
- sb->s_maxbytes = data->sb->s_maxbytes;
-
- server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
- server->io_stats = nfs_alloc_iostats();
- if (server->io_stats == NULL)
- goto out;
-
- server->client = rpc_clone_client(parent->client);
- if (IS_ERR((err = server->client)))
- goto out;
-
- if (!IS_ERR(parent->client_sys)) {
- server->client_sys = rpc_clone_client(parent->client_sys);
- if (IS_ERR((err = server->client_sys)))
- goto out;
- }
- if (!IS_ERR(parent->client_acl)) {
- server->client_acl = rpc_clone_client(parent->client_acl);
- if (IS_ERR((err = server->client_acl)))
- goto out;
+ 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;
}
- root_inode = nfs_fhget(sb, data->fh, data->fattr);
- if (!root_inode)
- goto out;
- sb->s_root = d_alloc_root(root_inode);
- if (!sb->s_root)
- goto out_put_root;
- fsinfo.fattr = data->fattr;
- if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0)
- nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
- sb->s_root->d_op = server->rpc_ops->dentry_ops;
- sb->s_flags |= MS_ACTIVE;
- return server;
-out_put_root:
- iput(root_inode);
-out:
- return err;
}
/*
- * Copy an existing superblock and attach revised data
+ * Parse the value of the 'sec=' option.
*/
-static int nfs_clone_generic_sb(struct nfs_clone_mount *data,
- struct super_block *(*fill_sb)(struct nfs_server *, struct nfs_clone_mount *),
- struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *),
- struct vfsmount *mnt)
+static int nfs_parse_security_flavors(char *value,
+ struct nfs_parsed_mount_data *mnt)
{
- struct nfs_server *server;
- struct nfs_server *parent = NFS_SB(data->sb);
- struct super_block *sb = ERR_PTR(-EINVAL);
- char *hostname;
- int error = -ENOMEM;
- int len;
+ substring_t args[MAX_OPT_ARGS];
- server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
- if (server == NULL)
- goto out_err;
- memcpy(server, parent, sizeof(*server));
- hostname = (data->hostname != NULL) ? data->hostname : parent->hostname;
- len = strlen(hostname) + 1;
- server->hostname = kmalloc(len, GFP_KERNEL);
- if (server->hostname == NULL)
- goto free_server;
- memcpy(server->hostname, hostname, len);
- error = rpciod_up();
- if (error != 0)
- goto free_hostname;
-
- sb = fill_sb(server, data);
- if (IS_ERR(sb)) {
- error = PTR_ERR(sb);
- goto kill_rpciod;
- }
-
- if (sb->s_root)
- goto out_rpciod_down;
+ dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value);
- server = fill_server(sb, data);
- if (IS_ERR(server)) {
- error = PTR_ERR(server);
- goto out_deactivate;
+ switch (match_token(value, nfs_secflavor_tokens, args)) {
+ case Opt_sec_none:
+ mnt->auth_flavors[0] = RPC_AUTH_NULL;
+ break;
+ case Opt_sec_sys:
+ mnt->auth_flavors[0] = RPC_AUTH_UNIX;
+ break;
+ case Opt_sec_krb5:
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5;
+ break;
+ case Opt_sec_krb5i:
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I;
+ break;
+ case Opt_sec_krb5p:
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P;
+ break;
+ case Opt_sec_lkey:
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY;
+ break;
+ case Opt_sec_lkeyi:
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI;
+ break;
+ case Opt_sec_lkeyp:
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP;
+ break;
+ case Opt_sec_spkm:
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM;
+ break;
+ case Opt_sec_spkmi:
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI;
+ break;
+ case Opt_sec_spkmp:
+ mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP;
+ break;
+ default:
+ return 0;
}
- return simple_set_mnt(mnt, sb);
-out_deactivate:
- up_write(&sb->s_umount);
- deactivate_super(sb);
- return error;
-out_rpciod_down:
- rpciod_down();
- kfree(server->hostname);
- kfree(server);
- return simple_set_mnt(mnt, sb);
-kill_rpciod:
- rpciod_down();
-free_hostname:
- kfree(server->hostname);
-free_server:
- kfree(server);
-out_err:
- return error;
+
+ mnt->auth_flavor_len = 1;
+ return 1;
}
/*
- * Set up an NFS2/3 superblock
- *
- * The way this works is that the mount process passes a structure
- * in the data argument which contains the server's IP address
- * and the root file handle obtained from the server's mount
- * daemon. We stash these away in the private superblock fields.
+ * 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_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
+static int nfs_parse_mount_options(char *raw,
+ struct nfs_parsed_mount_data *mnt)
{
- struct nfs_server *server;
- rpc_authflavor_t authflavor;
-
- server = NFS_SB(sb);
- sb->s_blocksize_bits = 0;
- sb->s_blocksize = 0;
- if (data->bsize)
- sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
- if (data->rsize)
- server->rsize = nfs_block_size(data->rsize, NULL);
- if (data->wsize)
- server->wsize = nfs_block_size(data->wsize, NULL);
- server->flags = data->flags & NFS_MOUNT_FLAGMASK;
-
- server->acregmin = data->acregmin*HZ;
- server->acregmax = data->acregmax*HZ;
- server->acdirmin = data->acdirmin*HZ;
- server->acdirmax = data->acdirmax*HZ;
-
- /* Start lockd here, before we might error out */
- if (!(server->flags & NFS_MOUNT_NONLM))
- lockd_up();
-
- server->namelen = data->namlen;
- server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
- if (!server->hostname)
- return -ENOMEM;
- strcpy(server->hostname, data->hostname);
-
- /* Check NFS protocol revision and initialize RPC op vector
- * and file handle pool. */
-#ifdef CONFIG_NFS_V3
- if (server->flags & NFS_MOUNT_VER3) {
- server->rpc_ops = &nfs_v3_clientops;
- server->caps |= NFS_CAP_READDIRPLUS;
- } else {
- server->rpc_ops = &nfs_v2_clientops;
- }
-#else
- server->rpc_ops = &nfs_v2_clientops;
-#endif
-
- /* Fill in pseudoflavor for mount version < 5 */
- if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
- data->pseudoflavor = RPC_AUTH_UNIX;
- authflavor = data->pseudoflavor; /* save for sb_init() */
- /* XXX maybe we want to add a server->pseudoflavor field */
-
- /* Create RPC client handles */
- server->client = nfs_create_client(server, data);
- if (IS_ERR(server->client))
- return PTR_ERR(server->client);
- /* RFC 2623, sec 2.3.2 */
- if (authflavor != RPC_AUTH_UNIX) {
- struct rpc_auth *auth;
-
- server->client_sys = rpc_clone_client(server->client);
- if (IS_ERR(server->client_sys))
- return PTR_ERR(server->client_sys);
- auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
- if (IS_ERR(auth))
- return PTR_ERR(auth);
- } else {
- atomic_inc(&server->client->cl_count);
- server->client_sys = server->client;
- }
- if (server->flags & NFS_MOUNT_VER3) {
-#ifdef CONFIG_NFS_V3_ACL
- if (!(server->flags & NFS_MOUNT_NOACL)) {
- server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
- /* No errors! Assume that Sun nfsacls are supported */
- if (!IS_ERR(server->client_acl))
- server->caps |= NFS_CAP_ACLS;
- }
-#else
- server->flags &= ~NFS_MOUNT_NOACL;
-#endif /* CONFIG_NFS_V3_ACL */
- /*
- * The VFS shouldn't apply the umask to mode bits. We will
- * do so ourselves when necessary.
- */
- sb->s_flags |= MS_POSIXACL;
- if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
- server->namelen = NFS3_MAXNAMLEN;
- sb->s_time_gran = 1;
- } else {
- if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
- server->namelen = NFS2_MAXNAMLEN;
+ char *p, *string, *secdata;
+ int rc, sloppy = 0, invalid_option = 0;
+ unsigned short protofamily = AF_UNSPEC;
+ unsigned short mountfamily = AF_UNSPEC;
+
+ if (!raw) {
+ dfprintk(MOUNT, "NFS: mount options string was NULL.\n");
+ return 1;
}
+ dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw);
- sb->s_op = &nfs_sops;
- return nfs_sb_init(sb, authflavor);
-}
-
-static int nfs_set_super(struct super_block *s, void *data)
-{
- s->s_fs_info = data;
- return set_anon_super(s, data);
-}
-
-static int nfs_compare_super(struct super_block *sb, void *data)
-{
- struct nfs_server *server = data;
- struct nfs_server *old = NFS_SB(sb);
+ secdata = alloc_secdata();
+ if (!secdata)
+ goto out_nomem;
- if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
- return 0;
- if (old->addr.sin_port != server->addr.sin_port)
- return 0;
- return !nfs_compare_fh(&old->fh, &server->fh);
-}
+ rc = security_sb_copy_data(raw, secdata);
+ if (rc)
+ goto out_security_failure;
-static int nfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
-{
- int error;
- struct nfs_server *server = NULL;
- struct super_block *s;
- struct nfs_fh *root;
- struct nfs_mount_data *data = raw_data;
+ rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts);
+ if (rc)
+ goto out_security_failure;
- error = -EINVAL;
- if (data == NULL) {
- dprintk("%s: missing data argument\n", __FUNCTION__);
- goto out_err_noserver;
- }
- if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
- dprintk("%s: bad mount version\n", __FUNCTION__);
- goto out_err_noserver;
- }
- 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);
- goto out_err_noserver;
- }
- 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);
- goto out_err_noserver;
- }
- case 5:
- memset(data->context, 0, sizeof(data->context));
- }
-#ifndef CONFIG_NFS_V3
- /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
- error = -EPROTONOSUPPORT;
- if (data->flags & NFS_MOUNT_VER3) {
- dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
- goto out_err_noserver;
- }
-#endif /* CONFIG_NFS_V3 */
+ free_secdata(secdata);
- error = -ENOMEM;
- server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
- if (!server)
- goto out_err_noserver;
- /* Zero out the NFS state stuff */
- init_nfsv4_state(server);
- server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
+ while ((p = strsep(&raw, ",")) != NULL) {
+ substring_t args[MAX_OPT_ARGS];
+ unsigned long option;
+ int token;
- root = &server->fh;
- if (data->flags & NFS_MOUNT_VER3)
- root->size = data->root.size;
- else
- root->size = NFS2_FHSIZE;
- error = -EINVAL;
- if (root->size > sizeof(root->data)) {
- dprintk("%s: invalid root filehandle\n", __FUNCTION__);
- goto out_err;
- }
- memcpy(root->data, data->root.data, root->size);
+ if (!*p)
+ continue;
- /* We now require that the mount process passes the remote address */
- memcpy(&server->addr, &data->addr, sizeof(server->addr));
- if (server->addr.sin_addr.s_addr == INADDR_ANY) {
- dprintk("%s: mount program didn't pass remote address!\n",
- __FUNCTION__);
- goto out_err;
- }
+ dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p);
- /* Fire up rpciod if not yet running */
- error = rpciod_up();
- if (error < 0) {
- dprintk("%s: couldn't start rpciod! Error = %d\n",
- __FUNCTION__, error);
- goto out_err;
- }
+ token = match_token(p, nfs_mount_option_tokens, args);
+ switch (token) {
- s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
- if (IS_ERR(s)) {
- error = PTR_ERR(s);
- goto out_err_rpciod;
- }
+ /*
+ * 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;
+ mnt->version = 2;
+ break;
+ case Opt_v3:
+ mnt->flags |= NFS_MOUNT_VER3;
+ mnt->version = 3;
+ break;
+#ifdef CONFIG_NFS_V4
+ case Opt_v4:
+ mnt->flags &= ~NFS_MOUNT_VER3;
+ mnt->version = 4;
+ break;
+#endif
+ 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:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0 || option > USHORT_MAX)
+ goto out_invalid_value;
+ mnt->nfs_server.port = option;
+ break;
+ case Opt_rsize:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0)
+ goto out_invalid_value;
+ mnt->rsize = option;
+ break;
+ case Opt_wsize:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0)
+ goto out_invalid_value;
+ mnt->wsize = option;
+ break;
+ case Opt_bsize:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0)
+ goto out_invalid_value;
+ mnt->bsize = option;
+ break;
+ case Opt_timeo:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0 || option == 0)
+ goto out_invalid_value;
+ mnt->timeo = option;
+ break;
+ case Opt_retrans:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0 || option == 0)
+ goto out_invalid_value;
+ mnt->retrans = option;
+ break;
+ case Opt_acregmin:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0)
+ goto out_invalid_value;
+ mnt->acregmin = option;
+ break;
+ case Opt_acregmax:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0)
+ goto out_invalid_value;
+ mnt->acregmax = option;
+ break;
+ case Opt_acdirmin:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0)
+ goto out_invalid_value;
+ mnt->acdirmin = option;
+ break;
+ case Opt_acdirmax:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0)
+ goto out_invalid_value;
+ mnt->acdirmax = option;
+ break;
+ case Opt_actimeo:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0)
+ goto out_invalid_value;
+ mnt->acregmin = mnt->acregmax =
+ mnt->acdirmin = mnt->acdirmax = option;
+ break;
+ case Opt_namelen:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0)
+ goto out_invalid_value;
+ mnt->namlen = option;
+ break;
+ case Opt_mountport:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0 || option > USHORT_MAX)
+ goto out_invalid_value;
+ mnt->mount_server.port = option;
+ break;
+ case Opt_mountvers:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0 ||
+ option < NFS_MNT_VERSION ||
+ option > NFS_MNT3_VERSION)
+ goto out_invalid_value;
+ mnt->mount_server.version = option;
+ break;
+ case Opt_nfsvers:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0)
+ goto out_invalid_value;
+ switch (option) {
+ case NFS2_VERSION:
+ mnt->flags &= ~NFS_MOUNT_VER3;
+ mnt->version = 2;
+ break;
+ case NFS3_VERSION:
+ mnt->flags |= NFS_MOUNT_VER3;
+ mnt->version = 3;
+ break;
+#ifdef CONFIG_NFS_V4
+ case NFS4_VERSION:
+ mnt->flags &= ~NFS_MOUNT_VER3;
+ mnt->version = 4;
+ break;
+#endif
+ default:
+ goto out_invalid_value;
+ }
+ break;
+ case Opt_minorversion:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = strict_strtoul(string, 10, &option);
+ kfree(string);
+ if (rc != 0)
+ goto out_invalid_value;
+ if (option > NFS4_MAX_MINOR_VERSION)
+ goto out_invalid_value;
+ mnt->minorversion = option;
+ 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) {
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "security flavor\n");
+ return 0;
+ }
+ break;
+ case Opt_proto:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ token = match_token(string,
+ nfs_xprt_protocol_tokens, args);
+
+ protofamily = AF_INET;
+ switch (token) {
+ case Opt_xprt_udp6:
+ protofamily = AF_INET6;
+ case Opt_xprt_udp:
+ mnt->flags &= ~NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
+ kfree(string);
+ break;
+ case Opt_xprt_tcp6:
+ protofamily = AF_INET6;
+ case Opt_xprt_tcp:
+ mnt->flags |= NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ kfree(string);
+ 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);
+ kfree(string);
+ break;
+ default:
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "transport protocol\n");
+ kfree(string);
+ return 0;
+ }
+ 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);
+
+ mountfamily = AF_INET;
+ switch (token) {
+ case Opt_xprt_udp6:
+ mountfamily = AF_INET6;
+ case Opt_xprt_udp:
+ mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
+ break;
+ case Opt_xprt_tcp6:
+ mountfamily = AF_INET6;
+ case Opt_xprt_tcp:
+ mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
+ break;
+ case Opt_xprt_rdma: /* not used for side protocols */
+ default:
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "transport protocol\n");
+ return 0;
+ }
+ break;
+ case Opt_addr:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ mnt->nfs_server.addrlen =
+ rpc_pton(string, strlen(string),
+ (struct sockaddr *)
+ &mnt->nfs_server.address,
+ sizeof(mnt->nfs_server.address));
+ kfree(string);
+ if (mnt->nfs_server.addrlen == 0)
+ goto out_invalid_address;
+ 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;
+ mnt->mount_server.addrlen =
+ rpc_pton(string, strlen(string),
+ (struct sockaddr *)
+ &mnt->mount_server.address,
+ sizeof(mnt->mount_server.address));
+ kfree(string);
+ if (mnt->mount_server.addrlen == 0)
+ goto out_invalid_address;
+ 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:
+ dfprintk(MOUNT, "NFS: invalid "
+ "lookupcache argument\n");
+ return 0;
+ };
+ 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:
+ invalid_option = 1;
+ dfprintk(MOUNT, "NFS: unrecognized mount option "
+ "'%s'\n", p);
+ }
+ }
+
+ if (!sloppy && invalid_option)
+ return 0;
+
+ /*
+ * verify that any proto=/mountproto= options match the address
+ * familiies in the addr=/mountaddr= options.
+ */
+ if (protofamily != AF_UNSPEC &&
+ protofamily != mnt->nfs_server.address.ss_family)
+ goto out_proto_mismatch;
+
+ if (mountfamily != AF_UNSPEC) {
+ if (mnt->mount_server.addrlen) {
+ if (mountfamily != mnt->mount_server.address.ss_family)
+ goto out_mountproto_mismatch;
+ } else {
+ if (mountfamily != mnt->nfs_server.address.ss_family)
+ goto out_mountproto_mismatch;
+ }
+ }
+
+ return 1;
+
+out_mountproto_mismatch:
+ printk(KERN_INFO "NFS: mount server address does not match mountproto= "
+ "option\n");
+ return 0;
+out_proto_mismatch:
+ printk(KERN_INFO "NFS: server address does not match proto= option\n");
+ return 0;
+out_invalid_address:
+ printk(KERN_INFO "NFS: bad IP address specified: %s\n", p);
+ return 0;
+out_invalid_value:
+ printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p);
+ return 0;
+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;
+}
+
+/*
+ * Match the requested auth flavors with the list returned by
+ * the server. Returns zero and sets the mount's authentication
+ * flavor on success; returns -EACCES if server does not support
+ * the requested flavor.
+ */
+static int nfs_walk_authlist(struct nfs_parsed_mount_data *args,
+ struct nfs_mount_request *request)
+{
+ unsigned int i, j, server_authlist_len = *(request->auth_flav_len);
+
+ /*
+ * Certain releases of Linux's mountd return an empty
+ * flavor list. To prevent behavioral regression with
+ * these servers (ie. rejecting mounts that used to
+ * succeed), revert to pre-2.6.32 behavior (no checking)
+ * if the returned flavor list is empty.
+ */
+ if (server_authlist_len == 0)
+ return 0;
+
+ /*
+ * We avoid sophisticated negotiating here, as there are
+ * plenty of cases where we can get it wrong, providing
+ * either too little or too much security.
+ *
+ * RFC 2623, section 2.7 suggests we SHOULD prefer the
+ * flavor listed first. However, some servers list
+ * AUTH_NULL first. Our caller plants AUTH_SYS, the
+ * preferred default, in args->auth_flavors[0] if user
+ * didn't specify sec= mount option.
+ */
+ for (i = 0; i < args->auth_flavor_len; i++)
+ for (j = 0; j < server_authlist_len; j++)
+ if (args->auth_flavors[i] == request->auth_flavs[j]) {
+ dfprintk(MOUNT, "NFS: using auth flavor %d\n",
+ request->auth_flavs[j]);
+ args->auth_flavors[0] = request->auth_flavs[j];
+ return 0;
+ }
+
+ dfprintk(MOUNT, "NFS: server does not support requested auth flavor\n");
+ nfs_umount(request);
+ return -EACCES;
+}
+
+/*
+ * 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)
+{
+ rpc_authflavor_t server_authlist[NFS_MAX_SECFLAVORS];
+ unsigned int server_authlist_len = ARRAY_SIZE(server_authlist);
+ 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,
+ .auth_flav_len = &server_authlist_len,
+ .auth_flavs = server_authlist,
+ };
+ int status;
+
+ if (args->mount_server.version == 0) {
+ switch (args->version) {
+ default:
+ args->mount_server.version = NFS_MNT3_VERSION;
+ break;
+ case 2:
+ args->mount_server.version = NFS_MNT_VERSION;
+ }
+ }
+ request.version = args->mount_server.version;
+
+ if (args->mount_server.hostname)
+ request.hostname = args->mount_server.hostname;
+ else
+ request.hostname = args->nfs_server.hostname;
+
+ /*
+ * 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;
+ nfs_set_port(request.sap, &args->mount_server.port, 0);
+
+ /*
+ * Now ask the mount server to map our export path
+ * to a file handle.
+ */
+ status = nfs_mount(&request);
+ if (status != 0) {
+ dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n",
+ request.hostname, status);
+ return status;
+ }
+
+ /*
+ * MNTv1 (NFSv2) does not support auth flavor negotiation.
+ */
+ if (args->mount_server.version != NFS_MNT3_VERSION)
+ return 0;
+ return nfs_walk_authlist(args, &request);
+}
+
+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;
+ struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
+
+ if (data == NULL)
+ goto out_no_data;
+
+ 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;
+ args->version = 3;
+ } else {
+ mntfh->size = NFS2_FHSIZE;
+ args->version = 2;
+ }
+
+
+ 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(sap, &data->addr, sizeof(data->addr));
+ args->nfs_server.addrlen = sizeof(data->addr);
+ if (!nfs_verify_server_address(sap))
+ 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(sap))
+ goto out_no_address;
+
+ if (args->version == 4)
+#ifdef CONFIG_NFS_V4
+ return nfs4_validate_text_mount_data(options,
+ args, dev_name);
+#else
+ goto out_v4_not_compiled;
+#endif
+
+ nfs_set_port(sap, &args->nfs_server.port, 0);
+
+ 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;
+ }
+ }
+
+#ifndef CONFIG_NFS_V3
+ if (args->version == 3)
+ 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 */
+
+#ifndef CONFIG_NFS_V4
+out_v4_not_compiled:
+ dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");
+ return -EPROTONOSUPPORT;
+#endif /* !CONFIG_NFS_V4 */
+
+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.port != nfss->port ||
+ data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen ||
+ !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address,
+ (struct sockaddr *)&nfss->nfs_client->cl_addr))
+ 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.port = nfss->port;
+ 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
+ */
+static inline void nfs_initialise_sb(struct super_block *sb)
+{
+ struct nfs_server *server = NFS_SB(sb);
+
+ sb->s_magic = NFS_SUPER_MAGIC;
+
+ /* We probably want something more informative here */
+ snprintf(sb->s_id, sizeof(sb->s_id),
+ "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
+
+ if (sb->s_blocksize == 0)
+ sb->s_blocksize = nfs_block_bits(server->wsize,
+ &sb->s_blocksize_bits);
+
+ if (server->flags & NFS_MOUNT_NOAC)
+ sb->s_flags |= MS_SYNCHRONOUS;
+
+ sb->s_bdi = &server->backing_dev_info;
+
+ nfs_super_set_maxbytes(sb, server->maxfilesize);
+}
+
+/*
+ * Finish setting up an NFS2/3 superblock
+ */
+static void nfs_fill_super(struct super_block *sb,
+ struct nfs_parsed_mount_data *data)
+{
+ struct nfs_server *server = NFS_SB(sb);
+
+ sb->s_blocksize_bits = 0;
+ sb->s_blocksize = 0;
+ if (data->bsize)
+ sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
+
+ if (server->nfs_client->rpc_ops->version == 3) {
+ /* The VFS shouldn't apply the umask to mode bits. We will do
+ * so ourselves when necessary.
+ */
+ sb->s_flags |= MS_POSIXACL;
+ sb->s_time_gran = 1;
+ }
+
+ sb->s_op = &nfs_sops;
+ nfs_initialise_sb(sb);
+}
+
+/*
+ * Finish setting up a cloned NFS2/3 superblock
+ */
+static void nfs_clone_super(struct super_block *sb,
+ const struct super_block *old_sb)
+{
+ struct nfs_server *server = NFS_SB(sb);
+
+ sb->s_blocksize_bits = old_sb->s_blocksize_bits;
+ sb->s_blocksize = old_sb->s_blocksize;
+ sb->s_maxbytes = old_sb->s_maxbytes;
+
+ if (server->nfs_client->rpc_ops->version == 3) {
+ /* The VFS shouldn't apply the umask to mode bits. We will do
+ * so ourselves when necessary.
+ */
+ sb->s_flags |= MS_POSIXACL;
+ sb->s_time_gran = 1;
+ }
+
+ sb->s_op = old_sb->s_op;
+ nfs_initialise_sb(sb);
+}
+
+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_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)
+ server->s_dev = s->s_dev;
+ 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_sb_mountdata *sb_mntdata = data;
+ struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb);
+ int mntflags = sb_mntdata->mntflags;
+
+ 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 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,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
+{
+ struct nfs_server *server = NULL;
+ struct super_block *s;
+ struct nfs_parsed_mount_data *data;
+ struct nfs_fh *mntfh;
+ struct dentry *mntroot;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
+ struct nfs_sb_mountdata sb_mntdata = {
+ .mntflags = flags,
+ };
+ int error = -ENOMEM;
+
+ data = nfs_alloc_parsed_mount_data(3);
+ 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(raw_data, data, mntfh, dev_name);
+ if (error < 0)
+ goto out;
+
+#ifdef CONFIG_NFS_V4
+ if (data->version == 4) {
+ error = nfs4_try_mount(flags, dev_name, data, mnt);
+ kfree(data->client_address);
+ kfree(data->nfs_server.export_path);
+ goto out;
+ }
+#endif /* CONFIG_NFS_V4 */
+
+ /* Get a volume representation */
+ server = nfs_create_server(data, mntfh);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ 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, 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_bdi;
+ }
+
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ nfs_fill_super(s, data);
+ nfs_fscache_get_super_cookie(
+ s, data ? data->fscache_uniq : NULL, NULL);
+ }
+
+ 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;
+ 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);
+ goto out;
+
+error_splat_root:
+ dput(mntroot);
+error_splat_super:
+ if (server && !s->s_root)
+ bdi_unregister(&server->backing_dev_info);
+error_splat_bdi:
+ deactivate_locked_super(s);
+ goto out;
+}
+
+/*
+ * Ensure that we unregister the bdi before kill_anon_super
+ * releases the device name
+ */
+static void nfs_put_super(struct super_block *s)
+{
+ struct nfs_server *server = NFS_SB(s);
+
+ bdi_unregister(&server->backing_dev_info);
+}
+
+/*
+ * Destroy an NFS2/3 superblock
+ */
+static void nfs_kill_super(struct super_block *s)
+{
+ struct nfs_server *server = NFS_SB(s);
+
+ kill_anon_super(s);
+ nfs_fscache_release_super_cookie(s);
+ nfs_free_server(server);
+}
+
+/*
+ * Clone an NFS2/3 server record on xdev traversal (FSID-change)
+ */
+static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *raw_data,
+ struct vfsmount *mnt)
+{
+ struct nfs_clone_mount *data = raw_data;
+ 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");
+
+ /* create a new volume representation */
+ server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ goto out_err_noserver;
+ }
+ sb_mntdata.server = server;
- if (s->s_root)
- goto out_rpciod_down;
+ if (server->flags & NFS_MOUNT_UNSHARED)
+ compare_super = NULL;
- s->s_flags = flags;
+ /* Get a superblock - note that we may end up sharing one that already exists */
+ s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata);
+ if (IS_ERR(s)) {
+ error = PTR_ERR(s);
+ goto out_err_nosb;
+ }
- error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
- if (error) {
- up_write(&s->s_umount);
- deactivate_super(s);
- return error;
+ if (s->s_fs_info != server) {
+ nfs_free_server(server);
+ server = NULL;
+ } else {
+ error = nfs_bdi_register(server);
+ if (error)
+ goto error_splat_bdi;
}
- s->s_flags |= MS_ACTIVE;
- return simple_set_mnt(mnt, s);
-out_rpciod_down:
- rpciod_down();
- kfree(server);
- return simple_set_mnt(mnt, s);
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ nfs_clone_super(s, data->sb);
+ nfs_fscache_get_super_cookie(s, NULL, data);
+ }
-out_err_rpciod:
- rpciod_down();
-out_err:
- kfree(server);
-out_err_noserver:
- return error;
-}
+ mntroot = nfs_get_root(s, data->fh);
+ if (IS_ERR(mntroot)) {
+ 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;
+ }
-static void nfs_kill_super(struct super_block *s)
-{
- struct nfs_server *server = NFS_SB(s);
+ s->s_flags |= MS_ACTIVE;
+ mnt->mnt_sb = s;
+ mnt->mnt_root = mntroot;
- kill_anon_super(s);
+ /* 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;
- if (!IS_ERR(server->client))
- rpc_shutdown_client(server->client);
- if (!IS_ERR(server->client_sys))
- rpc_shutdown_client(server->client_sys);
- if (!IS_ERR(server->client_acl))
- rpc_shutdown_client(server->client_acl);
+out_err_nosb:
+ nfs_free_server(server);
+out_err_noserver:
+ dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error);
+ return error;
- if (!(server->flags & NFS_MOUNT_NONLM))
- lockd_down(); /* release rpc.lockd */
+error_splat_super:
+ if (server && !s->s_root)
+ bdi_unregister(&server->backing_dev_info);
+error_splat_bdi:
+ deactivate_locked_super(s);
+ dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
+ return error;
+}
- rpciod_down(); /* release rpciod */
+#ifdef CONFIG_NFS_V4
- nfs_free_iostats(server->io_stats);
- kfree(server->hostname);
- kfree(server);
- nfs_release_automount_timer();
+/*
+ * Finish setting up a cloned NFS4 superblock
+ */
+static void nfs4_clone_super(struct super_block *sb,
+ const struct super_block *old_sb)
+{
+ sb->s_blocksize_bits = old_sb->s_blocksize_bits;
+ sb->s_blocksize = old_sb->s_blocksize;
+ sb->s_maxbytes = old_sb->s_maxbytes;
+ sb->s_time_gran = 1;
+ sb->s_op = old_sb->s_op;
+ nfs_initialise_sb(sb);
}
-static struct super_block *nfs_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
+/*
+ * Set up an NFS4 superblock
+ */
+static void nfs4_fill_super(struct super_block *sb)
{
- struct super_block *sb;
-
- server->fsid = data->fattr->fsid;
- nfs_copy_fh(&server->fh, data->fh);
- sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
- if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM))
- lockd_up();
- return sb;
+ sb->s_time_gran = 1;
+ sb->s_op = &nfs4_sops;
+ nfs_initialise_sb(sb);
}
-static int nfs_clone_nfs_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
+static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args)
{
- struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server, mnt);
+ args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3);
}
-#ifdef CONFIG_NFS_V4
-static struct rpc_clnt *nfs4_create_client(struct nfs_server *server,
- struct rpc_timeout *timeparms, int proto, rpc_authflavor_t flavor)
+static int nfs4_validate_text_mount_data(void *options,
+ struct nfs_parsed_mount_data *args,
+ const char *dev_name)
{
- struct nfs4_client *clp;
- struct rpc_xprt *xprt = NULL;
- struct rpc_clnt *clnt = NULL;
- int err = -EIO;
-
- clp = nfs4_get_client(&server->addr.sin_addr);
- if (!clp) {
- dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
- return ERR_PTR(err);
- }
+ struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
- /* Now create transport and client */
- down_write(&clp->cl_sem);
- if (IS_ERR(clp->cl_rpcclient)) {
- xprt = xprt_create_proto(proto, &server->addr, timeparms);
- if (IS_ERR(xprt)) {
- up_write(&clp->cl_sem);
- err = PTR_ERR(xprt);
- dprintk("%s: cannot create RPC transport. Error = %d\n",
- __FUNCTION__, err);
- goto out_fail;
- }
- /* Bind to a reserved port! */
- xprt->resvport = 1;
- clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
- server->rpc_ops->version, flavor);
- if (IS_ERR(clnt)) {
- up_write(&clp->cl_sem);
- err = PTR_ERR(clnt);
- dprintk("%s: cannot create RPC client. Error = %d\n",
- __FUNCTION__, err);
- goto out_fail;
- }
- clnt->cl_intr = 1;
- clnt->cl_softrtry = 1;
- clp->cl_rpcclient = clnt;
- memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr));
- nfs_idmap_new(clp);
+ nfs_set_port(sap, &args->nfs_server.port, NFS_PORT);
+
+ nfs_validate_transport_protocol(args);
+
+ nfs4_validate_mount_flags(args);
+
+ if (args->version != 4) {
+ dfprintk(MOUNT,
+ "NFS4: Illegal mount version\n");
+ return -EINVAL;
}
- list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
- clnt = rpc_clone_client(clp->cl_rpcclient);
- if (!IS_ERR(clnt))
- server->nfs4_state = clp;
- up_write(&clp->cl_sem);
- clp = NULL;
-
- if (IS_ERR(clnt)) {
- dprintk("%s: cannot create RPC client. Error = %d\n",
- __FUNCTION__, err);
- return clnt;
+
+ if (args->auth_flavor_len > 1) {
+ dfprintk(MOUNT,
+ "NFS4: Too many RPC auth flavours specified\n");
+ return -EINVAL;
}
- if (server->nfs4_state->cl_idmap == NULL) {
- dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
- return ERR_PTR(-ENOMEM);
+ if (args->client_address == NULL) {
+ dfprintk(MOUNT,
+ "NFS4: mount program didn't pass callback address\n");
+ return -EINVAL;
}
- if (clnt->cl_auth->au_flavor != flavor) {
- struct rpc_auth *auth;
+ return nfs_parse_devname(dev_name,
+ &args->nfs_server.hostname,
+ NFS4_MAXNAMLEN,
+ &args->nfs_server.export_path,
+ NFS4_MAXPATHLEN);
+}
+
+/*
+ * Validate NFSv4 mount options
+ */
+static int nfs4_validate_mount_data(void *options,
+ struct nfs_parsed_mount_data *args,
+ const char *dev_name)
+{
+ struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
+ struct nfs4_mount_data *data = (struct nfs4_mount_data *)options;
+ char *c;
+
+ if (data == NULL)
+ goto out_no_data;
- auth = rpcauth_create(flavor, clnt);
- if (IS_ERR(auth)) {
- dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
- return (struct rpc_clnt *)auth;
+ switch (data->version) {
+ case 1:
+ 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(sap, data->host_addr, data->host_addrlen))
+ return -EFAULT;
+ if (!nfs_verify_server_address(sap))
+ 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:
+ if (nfs_parse_mount_options((char *)options, args) == 0)
+ return -EINVAL;
+
+ if (!nfs_verify_server_address(sap))
+ return -EINVAL;
+
+ return nfs4_validate_text_mount_data(options, args, dev_name);
}
- return clnt;
- out_fail:
- if (clp)
- nfs4_put_client(clp);
- return ERR_PTR(err);
+ 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;
}
/*
- * Set up an NFS4 superblock
+ * Get the superblock for the NFS4 root partition
*/
-static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
+static int nfs4_remote_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
+ struct nfs_parsed_mount_data *data = raw_data;
+ struct super_block *s;
struct nfs_server *server;
- struct rpc_timeout timeparms;
- rpc_authflavor_t authflavour;
- int err = -EIO;
+ struct nfs_fh *mntfh;
+ struct dentry *mntroot;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
+ struct nfs_sb_mountdata sb_mntdata = {
+ .mntflags = flags,
+ };
+ int error = -ENOMEM;
- sb->s_blocksize_bits = 0;
- sb->s_blocksize = 0;
- server = NFS_SB(sb);
- if (data->rsize != 0)
- server->rsize = nfs_block_size(data->rsize, NULL);
- if (data->wsize != 0)
- server->wsize = nfs_block_size(data->wsize, NULL);
- server->flags = data->flags & NFS_MOUNT_FLAGMASK;
- server->caps = NFS_CAP_ATOMIC_OPEN;
-
- server->acregmin = data->acregmin*HZ;
- server->acregmax = data->acregmax*HZ;
- server->acdirmin = data->acdirmin*HZ;
- server->acdirmax = data->acdirmax*HZ;
-
- server->rpc_ops = &nfs_v4_clientops;
-
- nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
-
- server->retrans_timeo = timeparms.to_initval;
- server->retrans_count = timeparms.to_retries;
-
- /* Now create transport and client */
- 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);
- err = -EINVAL;
- goto out_fail;
- }
- if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) {
- err = -EFAULT;
- goto out_fail;
- }
+ mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL);
+ if (data == NULL || mntfh == NULL)
+ goto out_free_fh;
+
+ security_init_mnt_opts(&data->lsm_opts);
+
+ /* Get a volume representation */
+ server = nfs4_create_server(data, mntfh);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ 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(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata);
+ if (IS_ERR(s)) {
+ error = PTR_ERR(s);
+ goto out_free;
}
- server->client = nfs4_create_client(server, &timeparms, data->proto, authflavour);
- if (IS_ERR(server->client)) {
- err = PTR_ERR(server->client);
- dprintk("%s: cannot create RPC client. Error = %d\n",
- __FUNCTION__, err);
- goto out_fail;
+ if (s->s_fs_info != server) {
+ nfs_free_server(server);
+ server = NULL;
+ } else {
+ error = nfs_bdi_register(server);
+ if (error)
+ goto error_splat_bdi;
}
- sb->s_time_gran = 1;
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ nfs4_fill_super(s);
+ nfs_fscache_get_super_cookie(
+ s, data ? data->fscache_uniq : NULL, NULL);
+ }
- sb->s_op = &nfs4_sops;
- err = nfs_sb_init(sb, authflavour);
+ mntroot = nfs4_get_root(s, mntfh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
+ }
- out_fail:
- return err;
+ 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;
+ error = 0;
+
+out:
+ security_free_mnt_opts(&data->lsm_opts);
+out_free_fh:
+ kfree(mntfh);
+ return error;
+
+out_free:
+ nfs_free_server(server);
+ goto out;
+
+error_splat_root:
+ dput(mntroot);
+error_splat_super:
+ if (server && !s->s_root)
+ bdi_unregister(&server->backing_dev_info);
+error_splat_bdi:
+ deactivate_locked_super(s);
+ goto out;
}
-static int nfs4_compare_super(struct super_block *sb, void *data)
+static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type,
+ int flags, void *data, const char *hostname)
{
- struct nfs_server *server = data;
- struct nfs_server *old = NFS_SB(sb);
+ struct vfsmount *root_mnt;
+ char *root_devname;
+ size_t len;
- if (strcmp(server->hostname, old->hostname) != 0)
- return 0;
- if (strcmp(server->mnt_path, old->mnt_path) != 0)
- return 0;
- return 1;
+ len = strlen(hostname) + 3;
+ root_devname = kmalloc(len, GFP_KERNEL);
+ if (root_devname == NULL)
+ return ERR_PTR(-ENOMEM);
+ snprintf(root_devname, len, "%s:/", hostname);
+ root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data);
+ kfree(root_devname);
+ return root_mnt;
}
-static void *
-nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
+static void nfs_fix_devname(const struct path *path, struct vfsmount *mnt)
{
- 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);
- }
- dst[maxlen] = '\0';
- return dst;
+ char *page = (char *) __get_free_page(GFP_KERNEL);
+ char *devname, *tmp;
+
+ if (page == NULL)
+ return;
+ devname = nfs_path(path->mnt->mnt_devname,
+ path->mnt->mnt_root, path->dentry,
+ page, PAGE_SIZE);
+ if (IS_ERR(devname))
+ goto out_freepage;
+ tmp = kstrdup(devname, GFP_KERNEL);
+ if (tmp == NULL)
+ goto out_freepage;
+ kfree(mnt->mnt_devname);
+ mnt->mnt_devname = tmp;
+out_freepage:
+ free_page((unsigned long)page);
}
-static int nfs4_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
+static int nfs_follow_remote_path(struct vfsmount *root_mnt,
+ const char *export_path, struct vfsmount *mnt_target)
{
- int error;
- struct nfs_server *server;
+ struct mnt_namespace *ns_private;
+ struct nameidata nd;
struct super_block *s;
- struct nfs4_mount_data *data = raw_data;
- void *p;
+ int ret;
- 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;
- }
+ ns_private = create_mnt_ns(root_mnt);
+ ret = PTR_ERR(ns_private);
+ if (IS_ERR(ns_private))
+ goto out_mntput;
- server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
- if (!server)
- return -ENOMEM;
- /* Zero out the NFS state stuff */
- init_nfsv4_state(server);
- server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
+ ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt,
+ export_path, LOOKUP_FOLLOW, &nd);
- p = nfs_copy_user_string(NULL, &data->hostname, 256);
- if (IS_ERR(p))
- goto out_err;
- server->hostname = p;
+ put_mnt_ns(ns_private);
- p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
- if (IS_ERR(p))
+ if (ret != 0)
goto out_err;
- server->mnt_path = p;
- p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
- sizeof(server->ip_addr) - 1);
- if (IS_ERR(p))
- goto out_err;
+ s = nd.path.mnt->mnt_sb;
+ atomic_inc(&s->s_active);
+ mnt_target->mnt_sb = s;
+ mnt_target->mnt_root = dget(nd.path.dentry);
- /* We now require that the mount process passes the remote address */
- if (data->host_addrlen != sizeof(server->addr)) {
- error = -EINVAL;
- goto out_free;
- }
- if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
- error = -EFAULT;
- goto out_free;
- }
- if (server->addr.sin_family != AF_INET ||
- server->addr.sin_addr.s_addr == INADDR_ANY) {
- dprintk("%s: mount program didn't pass remote IP address!\n",
- __FUNCTION__);
- error = -EINVAL;
- goto out_free;
- }
+ /* Correct the device pathname */
+ nfs_fix_devname(&nd.path, mnt_target);
- /* Fire up rpciod if not yet running */
- error = rpciod_up();
- if (error < 0) {
- dprintk("%s: couldn't start rpciod! Error = %d\n",
- __FUNCTION__, error);
- goto out_free;
- }
+ path_put(&nd.path);
+ down_write(&s->s_umount);
+ return 0;
+out_mntput:
+ mntput(root_mnt);
+out_err:
+ return ret;
+}
- s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
+static int nfs4_try_mount(int flags, const char *dev_name,
+ struct nfs_parsed_mount_data *data,
+ struct vfsmount *mnt)
+{
+ char *export_path;
+ struct vfsmount *root_mnt;
+ int error;
- if (IS_ERR(s)) {
- error = PTR_ERR(s);
- goto out_free;
- }
+ dfprintk(MOUNT, "--> nfs4_try_mount()\n");
- if (s->s_root) {
- kfree(server->mnt_path);
- kfree(server->hostname);
- kfree(server);
- return simple_set_mnt(mnt, s);
- }
+ export_path = data->nfs_server.export_path;
+ data->nfs_server.export_path = "/";
+ root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, data,
+ data->nfs_server.hostname);
+ data->nfs_server.export_path = export_path;
- s->s_flags = flags;
+ error = PTR_ERR(root_mnt);
+ if (IS_ERR(root_mnt))
+ goto out;
- error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
- if (error) {
- up_write(&s->s_umount);
- deactivate_super(s);
- return error;
- }
- s->s_flags |= MS_ACTIVE;
- return simple_set_mnt(mnt, s);
-out_err:
- error = PTR_ERR(p);
-out_free:
- kfree(server->mnt_path);
- kfree(server->hostname);
- kfree(server);
+ error = nfs_follow_remote_path(root_mnt, export_path, mnt);
+
+out:
+ dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", error,
+ error != 0 ? " [error]" : "");
return error;
}
-static void nfs4_kill_super(struct super_block *sb)
+/*
+ * Get the superblock for an NFS4 mountpoint
+ */
+static int nfs4_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
- struct nfs_server *server = NFS_SB(sb);
+ struct nfs_parsed_mount_data *data;
+ int error = -ENOMEM;
- nfs_return_all_delegations(sb);
- kill_anon_super(sb);
+ data = nfs_alloc_parsed_mount_data(4);
+ if (data == NULL)
+ goto out_free_data;
- nfs4_renewd_prepare_shutdown(server);
+ /* Validate the mount data */
+ error = nfs4_validate_mount_data(raw_data, data, dev_name);
+ if (error < 0)
+ goto out;
- if (server->client != NULL && !IS_ERR(server->client))
- rpc_shutdown_client(server->client);
+ error = nfs4_try_mount(flags, dev_name, data, mnt);
- destroy_nfsv4_state(server);
+out:
+ kfree(data->client_address);
+ kfree(data->nfs_server.export_path);
+ kfree(data->nfs_server.hostname);
+ kfree(data->fscache_uniq);
+out_free_data:
+ kfree(data);
+ dprintk("<-- nfs4_get_sb() = %d%s\n", error,
+ error != 0 ? " [error]" : "");
+ return error;
+}
- rpciod_down();
+static void nfs4_kill_super(struct super_block *sb)
+{
+ struct nfs_server *server = NFS_SB(sb);
- nfs_free_iostats(server->io_stats);
- kfree(server->hostname);
- kfree(server);
- nfs_release_automount_timer();
+ dprintk("--> %s\n", __func__);
+ nfs_super_return_all_delegations(sb);
+ kill_anon_super(sb);
+ nfs_fscache_release_super_cookie(sb);
+ nfs_free_server(server);
+ dprintk("<-- %s\n", __func__);
}
/*
- * Constructs the SERVER-side path
+ * Clone an NFS4 server record on xdev traversal (FSID-change)
*/
-static inline char *nfs4_dup_path(const struct dentry *dentry)
+static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *raw_data,
+ struct vfsmount *mnt)
{
- char *page = (char *) __get_free_page(GFP_USER);
- char *path;
+ struct nfs_clone_mount *data = raw_data;
+ 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;
- path = nfs4_path(dentry, page, PAGE_SIZE);
- if (!IS_ERR(path)) {
- int len = PAGE_SIZE + page - path;
- char *tmp = path;
+ dprintk("--> nfs4_xdev_get_sb()\n");
- path = kmalloc(len, GFP_KERNEL);
- if (path)
- memcpy(path, tmp, len);
- else
- path = ERR_PTR(-ENOMEM);
+ /* create a new volume representation */
+ server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ goto out_err_noserver;
}
- free_page((unsigned long)page);
- return path;
-}
+ sb_mntdata.server = server;
-static struct super_block *nfs4_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
-{
- const struct dentry *dentry = data->dentry;
- struct nfs4_client *clp = server->nfs4_state;
- struct super_block *sb;
-
- server->fsid = data->fattr->fsid;
- nfs_copy_fh(&server->fh, data->fh);
- server->mnt_path = nfs4_dup_path(dentry);
- if (IS_ERR(server->mnt_path)) {
- sb = (struct super_block *)server->mnt_path;
- goto err;
+ 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(&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_bdi;
+ }
+
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ nfs4_clone_super(s, data->sb);
+ nfs_fscache_get_super_cookie(s, NULL, data);
+ }
+
+ mntroot = nfs4_get_root(s, data->fh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
}
- sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
- if (IS_ERR(sb) || sb->s_root)
- goto free_path;
- nfs4_server_capabilities(server, &server->fh);
-
- down_write(&clp->cl_sem);
- atomic_inc(&clp->cl_count);
- list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
- up_write(&clp->cl_sem);
- return sb;
-free_path:
- kfree(server->mnt_path);
-err:
- server->mnt_path = NULL;
- return sb;
+ 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;
+
+out_err_nosb:
+ nfs_free_server(server);
+out_err_noserver:
+ dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error);
+ return error;
+
+error_splat_super:
+ if (server && !s->s_root)
+ bdi_unregister(&server->backing_dev_info);
+error_splat_bdi:
+ deactivate_locked_super(s);
+ dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error);
+ return error;
}
-static int nfs_clone_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
+static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data,
+ struct vfsmount *mnt)
{
struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server, mnt);
-}
+ struct super_block *s;
+ 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;
-static struct super_block *nfs4_referral_sb(struct nfs_server *server, struct nfs_clone_mount *data)
-{
- struct super_block *sb = ERR_PTR(-ENOMEM);
- int len;
-
- len = strlen(data->mnt_path) + 1;
- server->mnt_path = kmalloc(len, GFP_KERNEL);
- if (server->mnt_path == NULL)
- goto err;
- memcpy(server->mnt_path, data->mnt_path, len);
- memcpy(&server->addr, data->addr, sizeof(struct sockaddr_in));
-
- sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
- if (IS_ERR(sb) || sb->s_root)
- goto free_path;
- return sb;
-free_path:
- kfree(server->mnt_path);
-err:
- server->mnt_path = NULL;
- return sb;
-}
+ dprintk("--> nfs4_referral_get_sb()\n");
-static struct nfs_server *nfs4_referral_server(struct super_block *sb, struct nfs_clone_mount *data)
-{
- struct nfs_server *server = NFS_SB(sb);
- struct rpc_timeout timeparms;
- int proto, timeo, retrans;
- void *err;
-
- proto = IPPROTO_TCP;
- /* Since we are following a referral and there may be alternatives,
- set the timeouts and retries to low values */
- timeo = 2;
- retrans = 1;
- nfs_init_timeout_values(&timeparms, proto, timeo, retrans);
-
- server->client = nfs4_create_client(server, &timeparms, proto, data->authflavor);
- if (IS_ERR((err = server->client)))
- goto out_err;
+ /* create a new volume representation */
+ server = nfs4_create_referral_server(data, &mntfh);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ goto out_err_noserver;
+ }
+ sb_mntdata.server = server;
- sb->s_time_gran = 1;
- sb->s_op = &nfs4_sops;
- err = ERR_PTR(nfs_sb_init(sb, data->authflavor));
- if (!IS_ERR(err))
- return server;
-out_err:
- return (struct nfs_server *)err;
+ 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(&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_bdi;
+ }
+
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ nfs4_fill_super(s);
+ nfs_fscache_get_super_cookie(s, NULL, data);
+ }
+
+ mntroot = nfs4_get_root(s, &mntfh);
+ if (IS_ERR(mntroot)) {
+ 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;
+
+out_err_nosb:
+ nfs_free_server(server);
+out_err_noserver:
+ dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
+ return error;
+
+error_splat_super:
+ if (server && !s->s_root)
+ bdi_unregister(&server->backing_dev_info);
+error_splat_bdi:
+ deactivate_locked_super(s);
+ dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
+ return error;
}
-static int nfs_referral_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
+/*
+ * Create an NFS4 server record on referral traversal
+ */
+static int nfs4_referral_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data,
+ struct vfsmount *mnt)
{
struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs4_referral_sb, nfs4_referral_server, mnt);
+ char *export_path;
+ struct vfsmount *root_mnt;
+ int error;
+
+ dprintk("--> nfs4_referral_get_sb()\n");
+
+ export_path = data->mnt_path;
+ data->mnt_path = "/";
+
+ root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type,
+ flags, data, data->hostname);
+ data->mnt_path = export_path;
+
+ error = PTR_ERR(root_mnt);
+ if (IS_ERR(root_mnt))
+ goto out;
+
+ error = nfs_follow_remote_path(root_mnt, export_path, mnt);
+out:
+ dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error,
+ error != 0 ? " [error]" : "");
+ return error;
}
-#endif
+#endif /* CONFIG_NFS_V4 */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff