Opt_udp, Opt_tcp,
Opt_acl, Opt_noacl,
Opt_rdirplus, Opt_nordirplus,
+ Opt_sharecache, Opt_nosharecache,
/* Mount options that take integer arguments */
Opt_port,
{ Opt_noacl, "noacl" },
{ Opt_rdirplus, "rdirplus" },
{ Opt_nordirplus, "nordirplus" },
+ { Opt_sharecache, "sharecache" },
+ { Opt_nosharecache, "nosharecache" },
{ Opt_port, "port=%u" },
{ Opt_rsize, "rsize=%u" },
};
#endif
-static struct shrinker *acl_shrinker;
+static struct shrinker acl_shrinker = {
+ .shrink = nfs_access_cache_shrinker,
+ .seeks = DEFAULT_SEEKS,
+};
/*
* Register the NFS filesystems
if (ret < 0)
goto error_2;
#endif
- acl_shrinker = set_shrinker(DEFAULT_SEEKS, nfs_access_cache_shrinker);
+ register_shrinker(&acl_shrinker);
return 0;
#ifdef CONFIG_NFS_V4
*/
void __exit unregister_nfs_fs(void)
{
- if (acl_shrinker != NULL)
- remove_shrinker(acl_shrinker);
+ unregister_shrinker(&acl_shrinker);
#ifdef CONFIG_NFS_V4
unregister_filesystem(&nfs4_fs_type);
nfs_unregister_sysctl();
{ NFS_MOUNT_NONLM, ",nolock", "" },
{ NFS_MOUNT_NOACL, ",noacl", "" },
{ NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" },
+ { NFS_MOUNT_UNSHARED, ",nosharecache", ""},
{ 0, NULL, NULL }
};
const struct proc_nfs_info *nfs_infop;
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_port:
if (match_int(args, &option))
{
struct nfs_server *server = data, *old = NFS_SB(sb);
- if (old->nfs_client != server->nfs_client)
+ if (memcmp(&old->nfs_client->cl_addr,
+ &server->nfs_client->cl_addr,
+ sizeof(old->nfs_client->cl_addr)) != 0)
+ return 0;
+ /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */
+ if (old->flags & NFS_MOUNT_UNSHARED)
return 0;
if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0)
return 0;
return 1;
}
+#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
+
+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 0;
+Ebusy:
+ return -EBUSY;
+}
+
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_fh mntfh;
struct nfs_mount_data *data = raw_data;
struct dentry *mntroot;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
int error;
/* Validate the mount data */
goto out;
}
+ if (server->flags & NFS_MOUNT_UNSHARED)
+ compare_super = NULL;
+
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
+ s = sget(fs_type, compare_super, nfs_set_super, server);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_err_nosb;
}
if (s->s_fs_info != server) {
+ error = nfs_compare_mount_options(s, server, flags);
nfs_free_server(server);
server = NULL;
+ if (error < 0)
+ goto error_splat_super;
}
if (!s->s_root) {
struct super_block *s;
struct nfs_server *server;
struct dentry *mntroot;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
int error;
dprintk("--> nfs_xdev_get_sb()\n");
goto out_err_noserver;
}
+ if (server->flags & NFS_MOUNT_UNSHARED)
+ compare_super = NULL;
+
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ s = sget(&nfs_fs_type, compare_super, nfs_set_super, server);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_err_nosb;
}
if (s->s_fs_info != server) {
+ error = nfs_compare_mount_options(s, server, flags);
nfs_free_server(server);
server = NULL;
+ if (error < 0)
+ goto error_splat_super;
}
if (!s->s_root) {
*ip_addr = c;
break;
- default:
- goto out_bad_version;
+ default: {
+ unsigned int len;
+ struct nfs_parsed_mount_data args = {
+ .rsize = NFS_MAX_FILE_IO_SIZE,
+ .wsize = NFS_MAX_FILE_IO_SIZE,
+ .timeo = 600,
+ .retrans = 2,
+ .acregmin = 3,
+ .acregmax = 60,
+ .acdirmin = 30,
+ .acdirmax = 60,
+ .nfs_server.protocol = IPPROTO_TCP,
+ };
+
+ if (nfs_parse_mount_options((char *) *options, &args) == 0)
+ return -EINVAL;
+
+ if (!nfs_verify_server_address((struct sockaddr *)
+ &args.nfs_server.address))
+ return -EINVAL;
+ *addr = args.nfs_server.address;
+
+ switch (args.auth_flavor_len) {
+ case 0:
+ *authflavour = RPC_AUTH_UNIX;
+ break;
+ case 1:
+ *authflavour = (rpc_authflavor_t) args.auth_flavors[0];
+ break;
+ default:
+ goto out_inval_auth;
+ }
+
+ /*
+ * Translate to nfs4_mount_data, which nfs4_fill_super
+ * can deal with.
+ */
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (data == NULL)
+ return -ENOMEM;
+ *options = data;
+
+ data->version = 1;
+ data->flags = args.flags & NFS4_MOUNT_FLAGMASK;
+ data->rsize = args.rsize;
+ data->wsize = args.wsize;
+ data->timeo = args.timeo;
+ data->retrans = args.retrans;
+ data->acregmin = args.acregmin;
+ data->acregmax = args.acregmax;
+ data->acdirmin = args.acdirmin;
+ data->acdirmax = args.acdirmax;
+ data->proto = args.nfs_server.protocol;
+
+ /*
+ * Split "dev_name" into "hostname:mntpath".
+ */
+ c = strchr(dev_name, ':');
+ if (c == NULL)
+ return -EINVAL;
+ /* while calculating len, pretend ':' is '\0' */
+ len = c - dev_name;
+ if (len > NFS4_MAXNAMLEN)
+ return -EINVAL;
+ *hostname = kzalloc(len, GFP_KERNEL);
+ if (*hostname == NULL)
+ return -ENOMEM;
+ strncpy(*hostname, dev_name, len - 1);
+
+ c++; /* step over the ':' */
+ len = strlen(c);
+ if (len > NFS4_MAXPATHLEN)
+ return -EINVAL;
+ *mntpath = kzalloc(len + 1, GFP_KERNEL);
+ if (*mntpath == NULL)
+ return -ENOMEM;
+ strncpy(*mntpath, c, len);
+
+ dprintk("MNTPATH: %s\n", *mntpath);
+
+ *ip_addr = args.client_address;
+
+ break;
+ }
}
return 0;
out_no_address:
dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");
return -EINVAL;
-
-out_bad_version:
- dfprintk(MOUNT, "NFS4: bad nfs_mount_data version %d\n",
- data->version);
- return -EINVAL;
}
/*
struct nfs_fh mntfh;
struct dentry *mntroot;
char *mntpath = NULL, *hostname = NULL, *ip_addr = NULL;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
int error;
/* Validate the mount data */
goto out;
}
+ if (server->flags & NFS4_MOUNT_UNSHARED)
+ compare_super = NULL;
+
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
+ s = sget(fs_type, compare_super, nfs_set_super, server);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_free;
struct super_block *s;
struct nfs_server *server;
struct dentry *mntroot;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
int error;
dprintk("--> nfs4_xdev_get_sb()\n");
goto out_err_noserver;
}
+ if (server->flags & NFS4_MOUNT_UNSHARED)
+ compare_super = NULL;
+
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ s = sget(&nfs_fs_type, compare_super, nfs_set_super, server);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_err_nosb;
struct nfs_server *server;
struct dentry *mntroot;
struct nfs_fh mntfh;
+ int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
int error;
dprintk("--> nfs4_referral_get_sb()\n");
goto out_err_noserver;
}
+ if (server->flags & NFS4_MOUNT_UNSHARED)
+ compare_super = NULL;
+
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ s = sget(&nfs_fs_type, compare_super, nfs_set_super, server);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_err_nosb;
projects / linux-2.6-omap-h63xx.git / blobdiff