mirror of https://gitee.com/openkylin/linux.git
NFS: Add enums and match tables for mount option parsing
This generic infrastructure works for both NFS and NFSv4 mounts. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever
Trond Myklebust
parent
013a8c1ab5
commit
bf0fd7680f
528
fs/nfs/super.c
528
fs/nfs/super.c
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@ -45,6 +45,7 @@
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#include <linux/inet.h>
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#include <linux/nfs_xdr.h>
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#include <linux/magic.h>
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#include <linux/parser.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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@ -57,6 +58,164 @@
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#define NFSDBG_FACILITY NFSDBG_VFS
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struct nfs_parsed_mount_data {
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int flags;
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int rsize, wsize;
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int timeo, retrans;
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int acregmin, acregmax,
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acdirmin, acdirmax;
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int namlen;
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unsigned int bsize;
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unsigned int auth_flavor_len;
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rpc_authflavor_t auth_flavors[1];
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char *client_address;
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struct {
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struct sockaddr_in address;
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unsigned int program;
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unsigned int version;
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unsigned short port;
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int protocol;
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} mount_server;
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struct {
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struct sockaddr_in address;
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char *hostname;
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char *export_path;
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unsigned int program;
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int protocol;
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} nfs_server;
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};
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enum {
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/* Mount options that take no arguments */
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Opt_soft, Opt_hard,
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Opt_intr, Opt_nointr,
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Opt_posix, Opt_noposix,
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Opt_cto, Opt_nocto,
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Opt_ac, Opt_noac,
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Opt_lock, Opt_nolock,
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Opt_v2, Opt_v3,
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Opt_udp, Opt_tcp,
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Opt_acl, Opt_noacl,
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Opt_rdirplus, Opt_nordirplus,
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/* Mount options that take integer arguments */
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Opt_port,
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Opt_rsize, Opt_wsize, Opt_bsize,
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Opt_timeo, Opt_retrans,
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Opt_acregmin, Opt_acregmax,
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Opt_acdirmin, Opt_acdirmax,
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Opt_actimeo,
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Opt_namelen,
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Opt_mountport,
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Opt_mountprog, Opt_mountvers,
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Opt_nfsprog, Opt_nfsvers,
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/* Mount options that take string arguments */
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Opt_sec, Opt_proto, Opt_mountproto,
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Opt_addr, Opt_mounthost, Opt_clientaddr,
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/* Mount options that are ignored */
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Opt_userspace, Opt_deprecated,
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Opt_err
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};
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static match_table_t nfs_mount_option_tokens = {
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{ Opt_userspace, "bg" },
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{ Opt_userspace, "fg" },
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{ Opt_soft, "soft" },
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{ Opt_hard, "hard" },
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{ Opt_intr, "intr" },
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{ Opt_nointr, "nointr" },
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{ Opt_posix, "posix" },
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{ Opt_noposix, "noposix" },
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{ Opt_cto, "cto" },
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{ Opt_nocto, "nocto" },
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{ Opt_ac, "ac" },
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{ Opt_noac, "noac" },
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{ Opt_lock, "lock" },
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{ Opt_nolock, "nolock" },
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{ Opt_v2, "v2" },
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{ Opt_v3, "v3" },
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{ Opt_udp, "udp" },
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{ Opt_tcp, "tcp" },
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{ Opt_acl, "acl" },
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{ Opt_noacl, "noacl" },
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{ Opt_rdirplus, "rdirplus" },
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{ Opt_nordirplus, "nordirplus" },
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{ Opt_port, "port=%u" },
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{ Opt_rsize, "rsize=%u" },
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{ Opt_wsize, "wsize=%u" },
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{ Opt_bsize, "bsize=%u" },
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{ Opt_timeo, "timeo=%u" },
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{ Opt_retrans, "retrans=%u" },
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{ Opt_acregmin, "acregmin=%u" },
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{ Opt_acregmax, "acregmax=%u" },
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{ Opt_acdirmin, "acdirmin=%u" },
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{ Opt_acdirmax, "acdirmax=%u" },
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{ Opt_actimeo, "actimeo=%u" },
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{ Opt_userspace, "retry=%u" },
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{ Opt_namelen, "namlen=%u" },
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{ Opt_mountport, "mountport=%u" },
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{ Opt_mountprog, "mountprog=%u" },
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{ Opt_mountvers, "mountvers=%u" },
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{ Opt_nfsprog, "nfsprog=%u" },
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{ Opt_nfsvers, "nfsvers=%u" },
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{ Opt_nfsvers, "vers=%u" },
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{ Opt_sec, "sec=%s" },
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{ Opt_proto, "proto=%s" },
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{ Opt_mountproto, "mountproto=%s" },
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{ Opt_addr, "addr=%s" },
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{ Opt_clientaddr, "clientaddr=%s" },
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{ Opt_mounthost, "mounthost=%s" },
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{ Opt_err, NULL }
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};
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enum {
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Opt_xprt_udp, Opt_xprt_tcp,
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Opt_xprt_err
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};
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static match_table_t nfs_xprt_protocol_tokens = {
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{ Opt_xprt_udp, "udp" },
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{ Opt_xprt_tcp, "tcp" },
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{ Opt_xprt_err, NULL }
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};
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enum {
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Opt_sec_none, Opt_sec_sys,
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Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
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Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp,
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Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp,
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Opt_sec_err
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};
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static match_table_t nfs_secflavor_tokens = {
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{ Opt_sec_none, "none" },
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{ Opt_sec_none, "null" },
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{ Opt_sec_sys, "sys" },
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{ Opt_sec_krb5, "krb5" },
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{ Opt_sec_krb5i, "krb5i" },
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{ Opt_sec_krb5p, "krb5p" },
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{ Opt_sec_lkey, "lkey" },
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{ Opt_sec_lkeyi, "lkeyi" },
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{ Opt_sec_lkeyp, "lkeyp" },
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{ Opt_sec_err, NULL }
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};
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static void nfs_umount_begin(struct vfsmount *, int);
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static int nfs_statfs(struct dentry *, struct kstatfs *);
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static int nfs_show_options(struct seq_file *, struct vfsmount *);
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@ -463,6 +622,375 @@ static int nfs_verify_server_address(struct sockaddr *addr)
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return 0;
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}
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/*
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* Error-check and convert a string of mount options from user space into
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* a data structure
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*/
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static int nfs_parse_mount_options(char *raw,
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struct nfs_parsed_mount_data *mnt)
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{
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char *p, *string;
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if (!raw) {
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dfprintk(MOUNT, "NFS: mount options string was NULL.\n");
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return 1;
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}
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dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw);
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while ((p = strsep(&raw, ",")) != NULL) {
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substring_t args[MAX_OPT_ARGS];
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int option, token;
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if (!*p)
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continue;
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dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p);
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token = match_token(p, nfs_mount_option_tokens, args);
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switch (token) {
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case Opt_soft:
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mnt->flags |= NFS_MOUNT_SOFT;
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break;
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case Opt_hard:
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mnt->flags &= ~NFS_MOUNT_SOFT;
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break;
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case Opt_intr:
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mnt->flags |= NFS_MOUNT_INTR;
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break;
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case Opt_nointr:
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mnt->flags &= ~NFS_MOUNT_INTR;
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break;
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case Opt_posix:
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mnt->flags |= NFS_MOUNT_POSIX;
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break;
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case Opt_noposix:
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mnt->flags &= ~NFS_MOUNT_POSIX;
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break;
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case Opt_cto:
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mnt->flags &= ~NFS_MOUNT_NOCTO;
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break;
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case Opt_nocto:
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mnt->flags |= NFS_MOUNT_NOCTO;
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break;
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case Opt_ac:
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mnt->flags &= ~NFS_MOUNT_NOAC;
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break;
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case Opt_noac:
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mnt->flags |= NFS_MOUNT_NOAC;
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break;
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case Opt_lock:
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mnt->flags &= ~NFS_MOUNT_NONLM;
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break;
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case Opt_nolock:
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mnt->flags |= NFS_MOUNT_NONLM;
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break;
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case Opt_v2:
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mnt->flags &= ~NFS_MOUNT_VER3;
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break;
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case Opt_v3:
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mnt->flags |= NFS_MOUNT_VER3;
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break;
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case Opt_udp:
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mnt->flags &= ~NFS_MOUNT_TCP;
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mnt->nfs_server.protocol = IPPROTO_UDP;
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mnt->timeo = 7;
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mnt->retrans = 5;
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break;
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case Opt_tcp:
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mnt->flags |= NFS_MOUNT_TCP;
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mnt->nfs_server.protocol = IPPROTO_TCP;
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mnt->timeo = 600;
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mnt->retrans = 2;
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break;
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case Opt_acl:
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mnt->flags &= ~NFS_MOUNT_NOACL;
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break;
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case Opt_noacl:
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mnt->flags |= NFS_MOUNT_NOACL;
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break;
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case Opt_rdirplus:
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mnt->flags &= ~NFS_MOUNT_NORDIRPLUS;
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break;
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case Opt_nordirplus:
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mnt->flags |= NFS_MOUNT_NORDIRPLUS;
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break;
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case Opt_port:
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if (match_int(args, &option))
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return 0;
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if (option < 0 || option > 65535)
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return 0;
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mnt->nfs_server.address.sin_port = htonl(option);
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break;
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case Opt_rsize:
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if (match_int(args, &mnt->rsize))
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return 0;
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break;
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case Opt_wsize:
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if (match_int(args, &mnt->wsize))
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return 0;
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break;
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case Opt_bsize:
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if (match_int(args, &option))
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return 0;
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if (option < 0)
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return 0;
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mnt->bsize = option;
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break;
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case Opt_timeo:
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if (match_int(args, &mnt->timeo))
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return 0;
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break;
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case Opt_retrans:
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if (match_int(args, &mnt->retrans))
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return 0;
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break;
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case Opt_acregmin:
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if (match_int(args, &mnt->acregmin))
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return 0;
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break;
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case Opt_acregmax:
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if (match_int(args, &mnt->acregmax))
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return 0;
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break;
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case Opt_acdirmin:
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if (match_int(args, &mnt->acdirmin))
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return 0;
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break;
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case Opt_acdirmax:
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if (match_int(args, &mnt->acdirmax))
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return 0;
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break;
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case Opt_actimeo:
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if (match_int(args, &option))
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return 0;
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if (option < 0)
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return 0;
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mnt->acregmin =
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mnt->acregmax =
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mnt->acdirmin =
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mnt->acdirmax = option;
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break;
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case Opt_namelen:
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if (match_int(args, &mnt->namlen))
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return 0;
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break;
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case Opt_mountport:
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if (match_int(args, &option))
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return 0;
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if (option < 0 || option > 65535)
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return 0;
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mnt->mount_server.port = option;
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break;
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case Opt_mountprog:
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if (match_int(args, &option))
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return 0;
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if (option < 0)
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return 0;
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mnt->mount_server.program = option;
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break;
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case Opt_mountvers:
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if (match_int(args, &option))
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return 0;
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if (option < 0)
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return 0;
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mnt->mount_server.version = option;
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break;
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case Opt_nfsprog:
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if (match_int(args, &option))
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return 0;
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if (option < 0)
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return 0;
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mnt->nfs_server.program = option;
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break;
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case Opt_nfsvers:
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if (match_int(args, &option))
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return 0;
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switch (option) {
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case 2:
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mnt->flags &= ~NFS_MOUNT_VER3;
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break;
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case 3:
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mnt->flags |= NFS_MOUNT_VER3;
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break;
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default:
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goto out_unrec_vers;
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}
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break;
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case Opt_sec:
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string = match_strdup(args);
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if (string == NULL)
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goto out_nomem;
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token = match_token(string, nfs_secflavor_tokens, args);
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kfree(string);
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/*
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* The flags setting is for v2/v3. The flavor_len
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* setting is for v4. v2/v3 also need to know the
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* difference between NULL and UNIX.
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*/
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switch (token) {
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case Opt_sec_none:
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mnt->flags &= ~NFS_MOUNT_SECFLAVOUR;
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mnt->auth_flavor_len = 0;
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mnt->auth_flavors[0] = RPC_AUTH_NULL;
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break;
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case Opt_sec_sys:
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mnt->flags &= ~NFS_MOUNT_SECFLAVOUR;
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mnt->auth_flavor_len = 0;
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mnt->auth_flavors[0] = RPC_AUTH_UNIX;
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break;
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case Opt_sec_krb5:
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mnt->flags |= NFS_MOUNT_SECFLAVOUR;
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mnt->auth_flavor_len = 1;
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mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5;
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break;
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case Opt_sec_krb5i:
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mnt->flags |= NFS_MOUNT_SECFLAVOUR;
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mnt->auth_flavor_len = 1;
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mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I;
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break;
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case Opt_sec_krb5p:
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mnt->flags |= NFS_MOUNT_SECFLAVOUR;
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mnt->auth_flavor_len = 1;
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mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P;
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break;
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case Opt_sec_lkey:
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mnt->flags |= NFS_MOUNT_SECFLAVOUR;
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mnt->auth_flavor_len = 1;
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mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY;
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break;
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case Opt_sec_lkeyi:
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mnt->flags |= NFS_MOUNT_SECFLAVOUR;
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mnt->auth_flavor_len = 1;
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mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI;
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break;
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case Opt_sec_lkeyp:
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mnt->flags |= NFS_MOUNT_SECFLAVOUR;
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mnt->auth_flavor_len = 1;
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mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP;
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break;
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case Opt_sec_spkm:
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mnt->flags |= NFS_MOUNT_SECFLAVOUR;
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mnt->auth_flavor_len = 1;
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mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM;
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break;
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case Opt_sec_spkmi:
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mnt->flags |= NFS_MOUNT_SECFLAVOUR;
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mnt->auth_flavor_len = 1;
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mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI;
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break;
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case Opt_sec_spkmp:
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mnt->flags |= NFS_MOUNT_SECFLAVOUR;
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mnt->auth_flavor_len = 1;
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mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP;
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break;
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default:
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goto out_unrec_sec;
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}
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break;
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case Opt_proto:
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string = match_strdup(args);
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if (string == NULL)
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goto out_nomem;
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token = match_token(string,
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nfs_xprt_protocol_tokens, args);
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kfree(string);
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switch (token) {
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case Opt_udp:
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mnt->flags &= ~NFS_MOUNT_TCP;
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mnt->nfs_server.protocol = IPPROTO_UDP;
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mnt->timeo = 7;
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mnt->retrans = 5;
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break;
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case Opt_tcp:
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mnt->flags |= NFS_MOUNT_TCP;
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mnt->nfs_server.protocol = IPPROTO_TCP;
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mnt->timeo = 600;
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mnt->retrans = 2;
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break;
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default:
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goto out_unrec_xprt;
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}
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||||
break;
|
||||
case Opt_mountproto:
|
||||
string = match_strdup(args);
|
||||
if (string == NULL)
|
||||
goto out_nomem;
|
||||
token = match_token(string,
|
||||
nfs_xprt_protocol_tokens, args);
|
||||
kfree(string);
|
||||
|
||||
switch (token) {
|
||||
case Opt_udp:
|
||||
mnt->mount_server.protocol = IPPROTO_UDP;
|
||||
break;
|
||||
case Opt_tcp:
|
||||
mnt->mount_server.protocol = IPPROTO_TCP;
|
||||
break;
|
||||
default:
|
||||
goto out_unrec_xprt;
|
||||
}
|
||||
break;
|
||||
case Opt_addr:
|
||||
string = match_strdup(args);
|
||||
if (string == NULL)
|
||||
goto out_nomem;
|
||||
mnt->nfs_server.address.sin_family = AF_INET;
|
||||
mnt->nfs_server.address.sin_addr.s_addr =
|
||||
in_aton(string);
|
||||
kfree(string);
|
||||
break;
|
||||
case Opt_clientaddr:
|
||||
string = match_strdup(args);
|
||||
if (string == NULL)
|
||||
goto out_nomem;
|
||||
mnt->client_address = string;
|
||||
break;
|
||||
case Opt_mounthost:
|
||||
string = match_strdup(args);
|
||||
if (string == NULL)
|
||||
goto out_nomem;
|
||||
mnt->mount_server.address.sin_family = AF_INET;
|
||||
mnt->mount_server.address.sin_addr.s_addr =
|
||||
in_aton(string);
|
||||
kfree(string);
|
||||
break;
|
||||
|
||||
case Opt_userspace:
|
||||
case Opt_deprecated:
|
||||
break;
|
||||
|
||||
default:
|
||||
goto out_unknown;
|
||||
}
|
||||
}
|
||||
|
||||
return 1;
|
||||
|
||||
out_nomem:
|
||||
printk(KERN_INFO "NFS: not enough memory to parse option\n");
|
||||
return 0;
|
||||
|
||||
out_unrec_vers:
|
||||
printk(KERN_INFO "NFS: unrecognized NFS version number\n");
|
||||
return 0;
|
||||
|
||||
out_unrec_xprt:
|
||||
printk(KERN_INFO "NFS: unrecognized transport protocol\n");
|
||||
return 0;
|
||||
|
||||
out_unrec_sec:
|
||||
printk(KERN_INFO "NFS: unrecognized security flavor\n");
|
||||
return 0;
|
||||
|
||||
out_unknown:
|
||||
printk(KERN_INFO "NFS: unknown mount option: %s\n", p);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Validate the NFS2/NFS3 mount data
|
||||
* - fills in the mount root filehandle
|
||||
|
|
|
|||
Loading…
Reference in New Issue