The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/nfs/nfs_var.h

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    1 /*      $NetBSD: nfs_var.h,v 1.90 2010/03/02 23:19:09 pooka Exp $       */
    2 
    3 /*-
    4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Christos Zoulas.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 /*
   33  * XXX needs <nfs/rpcv2.h> and <nfs/nfs.h> because of typedefs
   34  */
   35 
   36 #ifdef _KERNEL
   37 #include <sys/mallocvar.h>
   38 #include <sys/pool.h>
   39 
   40 struct vnode;
   41 struct uio;
   42 struct proc;
   43 struct buf;
   44 struct nfs_diskless;
   45 struct sockaddr_in;
   46 struct nfs_dlmount;
   47 struct vnode;
   48 struct nfsd;
   49 struct mbuf;
   50 struct file;
   51 struct nfssvc_sock;
   52 struct nfsmount;
   53 struct socket;
   54 struct nfsreq;
   55 struct vattr;
   56 struct nameidata;
   57 struct nfsnode;
   58 struct sillyrename;
   59 struct componentname;
   60 struct nfsd_srvargs;
   61 struct nfsrv_descript;
   62 struct nfs_fattr;
   63 struct nfsdircache;
   64 union nethostaddr;
   65 
   66 /* nfs_bio.c */
   67 int nfs_bioread(struct vnode *, struct uio *, int, kauth_cred_t, int);
   68 struct buf *nfs_getcacheblk(struct vnode *, daddr_t, int, struct lwp *);
   69 int nfs_vinvalbuf(struct vnode *, int, kauth_cred_t, struct lwp *, int);
   70 int nfs_flushstalebuf(struct vnode *, kauth_cred_t, struct lwp *, int);
   71 #define NFS_FLUSHSTALEBUF_MYWRITE       1       /* assume writes are ours */
   72 int nfs_asyncio(struct buf *);
   73 int nfs_doio(struct buf *);
   74 
   75 /* nfs_boot.c */
   76 /* see nfsdiskless.h */
   77 
   78 /* nfs_kq.c */
   79 void nfs_kqinit(void);
   80 void nfs_kqfini(void);
   81 
   82 /* nfs_node.c */
   83 void nfs_rbtinit(struct nfsmount *);
   84 void nfs_node_init(void);
   85 void nfs_node_done(void);
   86 
   87 int nfs_nget1(struct mount *, nfsfh_t *, int, struct nfsnode **, int);
   88 #define nfs_nget(mp, fhp, fhsize, npp) \
   89         nfs_nget1((mp), (fhp), (fhsize), (npp), 0)
   90 
   91 /* nfs_vnops.c */
   92 int nfs_null(struct vnode *, kauth_cred_t, struct lwp *);
   93 int nfs_setattrrpc(struct vnode *, struct vattr *, kauth_cred_t, struct lwp *);
   94 int nfs_readlinkrpc(struct vnode *, struct uio *, kauth_cred_t);
   95 int nfs_readrpc(struct vnode *, struct uio *);
   96 int nfs_writerpc(struct vnode *, struct uio *, int *, bool, bool *);
   97 int nfs_mknodrpc(struct vnode *, struct vnode **, struct componentname *,
   98         struct vattr *);
   99 int nfs_removeit(struct sillyrename *);
  100 int nfs_removerpc(struct vnode *, const char *, int, kauth_cred_t,
  101         struct lwp *);
  102 int nfs_renameit(struct vnode *, struct componentname *, struct sillyrename *);
  103 int nfs_renamerpc(struct vnode *, const char *, int, struct vnode *,
  104         const char *, int, kauth_cred_t, struct lwp *);
  105 int nfs_readdirrpc(struct vnode *, struct uio *, kauth_cred_t);
  106 int nfs_readdirplusrpc(struct vnode *, struct uio *, kauth_cred_t);
  107 int nfs_sillyrename(struct vnode *, struct vnode *, struct componentname *,
  108         bool);
  109 int nfs_lookitup(struct vnode *, const char *, int, kauth_cred_t,
  110         struct lwp *, struct nfsnode **);
  111 int nfs_commit(struct vnode *, off_t, uint32_t, struct lwp *);
  112 int nfs_flush(struct vnode *, kauth_cred_t, int, struct lwp *, int);
  113 
  114 /* nfs_serv.c */
  115 int nfsrv3_access(struct nfsrv_descript *, struct nfssvc_sock *,
  116         struct lwp *, struct mbuf **);
  117 int nfsrv_getattr(struct nfsrv_descript *, struct nfssvc_sock *,
  118         struct lwp *, struct mbuf **);
  119 int nfsrv_setattr(struct nfsrv_descript *, struct nfssvc_sock *,
  120         struct lwp *, struct mbuf **);
  121 int nfsrv_lookup(struct nfsrv_descript *, struct nfssvc_sock *,
  122         struct lwp *, struct mbuf **);
  123 int nfsrv_readlink(struct nfsrv_descript *, struct nfssvc_sock *,
  124         struct lwp *, struct mbuf **);
  125 int nfsrv_read(struct nfsrv_descript *, struct nfssvc_sock *,
  126         struct lwp *, struct mbuf **);
  127 int nfsrv_write(struct nfsrv_descript *, struct nfssvc_sock *,
  128         struct lwp *, struct mbuf **);
  129 int nfsrv_writegather(struct nfsrv_descript **, struct nfssvc_sock *,
  130         struct lwp *, struct mbuf **);
  131 void nfsrvw_coalesce(struct nfsrv_descript *, struct nfsrv_descript *);
  132 int nfsrv_create(struct nfsrv_descript *, struct nfssvc_sock *,
  133         struct lwp *, struct mbuf **);
  134 int nfsrv_mknod(struct nfsrv_descript *, struct nfssvc_sock *,
  135         struct lwp *, struct mbuf **);
  136 int nfsrv_remove(struct nfsrv_descript *, struct nfssvc_sock *,
  137         struct lwp *, struct mbuf **);
  138 int nfsrv_rename(struct nfsrv_descript *, struct nfssvc_sock *,
  139         struct lwp *, struct mbuf **);
  140 int nfsrv_link(struct nfsrv_descript *, struct nfssvc_sock *,
  141         struct lwp *, struct mbuf **);
  142 int nfsrv_symlink(struct nfsrv_descript *, struct nfssvc_sock *,
  143         struct lwp *, struct mbuf **);
  144 int nfsrv_mkdir(struct nfsrv_descript *, struct nfssvc_sock *,
  145         struct lwp *, struct mbuf **);
  146 int nfsrv_rmdir(struct nfsrv_descript *, struct nfssvc_sock *,
  147         struct lwp *, struct mbuf **);
  148 int nfsrv_readdir(struct nfsrv_descript *, struct nfssvc_sock *,
  149         struct lwp *, struct mbuf **);
  150 int nfsrv_readdirplus(struct nfsrv_descript *, struct nfssvc_sock *,
  151         struct lwp *, struct mbuf **);
  152 int nfsrv_commit(struct nfsrv_descript *, struct nfssvc_sock *,
  153         struct lwp *, struct mbuf **);
  154 int nfsrv_statfs(struct nfsrv_descript *, struct nfssvc_sock *,
  155         struct lwp *, struct mbuf **);
  156 int nfsrv_fsinfo(struct nfsrv_descript *, struct nfssvc_sock *,
  157         struct lwp *, struct mbuf **);
  158 int nfsrv_pathconf(struct nfsrv_descript *, struct nfssvc_sock *,
  159         struct lwp *, struct mbuf **);
  160 int nfsrv_null(struct nfsrv_descript *, struct nfssvc_sock *,
  161         struct lwp *, struct mbuf **);
  162 int nfsrv_noop(struct nfsrv_descript *, struct nfssvc_sock *,
  163         struct lwp *, struct mbuf **);
  164 int nfsrv_access(struct vnode *, int, kauth_cred_t, int, struct lwp *, int);
  165 
  166 /* nfs_socket.c */
  167 int nfs_connect(struct nfsmount *, struct nfsreq *, struct lwp *);
  168 int nfs_reconnect(struct nfsreq *);
  169 void nfs_disconnect(struct nfsmount *);
  170 void nfs_safedisconnect(struct nfsmount *);
  171 int nfs_send(struct socket *, struct mbuf *, struct mbuf *, struct nfsreq *,
  172         struct lwp *);
  173 int nfs_request(struct nfsnode *, struct mbuf *, int, struct lwp *,
  174         kauth_cred_t, struct mbuf **, struct mbuf **, char **, int *);
  175 int nfs_rephead(int, struct nfsrv_descript *, struct nfssvc_sock *,
  176         int, int, u_quad_t *, struct mbuf **, struct mbuf **, char **);
  177 void nfs_timer(void *);
  178 void nfs_timer_init(void);
  179 void nfs_timer_fini(void);
  180 void nfs_timer_start(void);
  181 void nfs_timer_srvinit(bool (*)(void));
  182 void nfs_timer_srvfini(void);
  183 int nfs_sigintr(struct nfsmount *, struct nfsreq *, struct lwp *);
  184 int nfs_getreq(struct nfsrv_descript *, struct nfsd *, int);
  185 int nfs_msg(struct lwp *, const char *, const char *);
  186 void nfsrv_soupcall(struct socket *, void *, int, int);
  187 void nfsrv_rcv(struct nfssvc_sock *);
  188 int nfsrv_getstream(struct nfssvc_sock *, int);
  189 int nfsrv_dorec(struct nfssvc_sock *, struct nfsd *, struct nfsrv_descript **,
  190     bool *);
  191 void nfsrv_wakenfsd(struct nfssvc_sock *);
  192 int nfsdsock_lock(struct nfssvc_sock *, bool);
  193 void nfsdsock_unlock(struct nfssvc_sock *);
  194 int nfsdsock_drain(struct nfssvc_sock *);
  195 int nfsdsock_sendreply(struct nfssvc_sock *, struct nfsrv_descript *);
  196 void nfsdreq_init(void);
  197 void nfsdreq_fini(void);
  198 struct nfsrv_descript *nfsdreq_alloc(void);
  199 void nfsdreq_free(struct nfsrv_descript *);
  200 bool nfsrv_timer(void);
  201 int nfs_rcvlock(struct nfsmount *, struct nfsreq *);
  202 void nfs_rcvunlock(struct nfsmount *);
  203 
  204 void nfsdsock_setbits(struct nfssvc_sock *, int);
  205 void nfsdsock_clearbits(struct nfssvc_sock *, int);
  206 bool nfsdsock_testbits(struct nfssvc_sock *, int);
  207 
  208 /*
  209  * Estimate rto for an nfs rpc sent via. an unreliable datagram.
  210  * Use the mean and mean deviation of rtt for the appropriate type of rpc
  211  * for the frequent rpcs and a default for the others.
  212  * The justification for doing "other" this way is that these rpcs
  213  * happen so infrequently that timer est. would probably be stale.
  214  * Also, since many of these rpcs are
  215  * non-idempotent, a conservative timeout is desired.
  216  * getattr, lookup - A+2D
  217  * read, write     - A+4D
  218  * other           - nm_timeo
  219  */
  220 #define NFS_RTO(n, t) \
  221         ((t) == 0 ? (n)->nm_timeo : \
  222          ((t) < 3 ? \
  223           (((((n)->nm_srtt[t-1] + 3) >> 2) + (n)->nm_sdrtt[t-1] + 1) >> 1) : \
  224           ((((n)->nm_srtt[t-1] + 7) >> 3) + (n)->nm_sdrtt[t-1] + 1)))
  225 #define NFS_SRTT(r)     (r)->r_nmp->nm_srtt[nfs_proct[(r)->r_procnum] - 1]
  226 #define NFS_SDRTT(r)    (r)->r_nmp->nm_sdrtt[nfs_proct[(r)->r_procnum] - 1]
  227 
  228 extern int nfsrtton;
  229 extern struct nfsrtt nfsrtt;
  230 extern const int nfs_proct[];
  231 
  232 extern const struct timeval nfs_err_interval;
  233 extern struct timeval nfs_reply_last_err_time;
  234 extern struct timeval nfs_timer_last_err_time;
  235 
  236 
  237 /* nfs_srvcache.c */
  238 void nfsrv_initcache(void);
  239 void nfsrv_finicache(void);
  240 int nfsrv_getcache(struct nfsrv_descript *, struct nfssvc_sock *,
  241         struct mbuf **);
  242 void nfsrv_updatecache(struct nfsrv_descript *, int, struct mbuf *);
  243 void nfsrv_cleancache(void);
  244 
  245 /* nfs_subs.c */
  246 struct mbuf *nfsm_reqh(struct nfsnode *, u_long, int, char **);
  247 struct mbuf *nfsm_rpchead(kauth_cred_t, int, int, int, int, char *, int,
  248         char *, struct mbuf *, int, struct mbuf **, u_int32_t *);
  249 int nfsm_mbuftouio(struct mbuf **, struct uio *, int, char **);
  250 int nfsm_uiotombuf(struct uio *, struct mbuf **, int, char **);
  251 int nfsm_disct(struct mbuf **, char **, int, int, char **);
  252 int nfs_adv(struct mbuf **, char **, int, int);
  253 int nfsm_strtmbuf(struct mbuf **, char **, const char *, long);
  254 u_long nfs_dirhash(off_t);
  255 void nfs_initdircache(struct vnode *);
  256 void nfs_initdirxlatecookie(struct vnode *);
  257 struct nfsdircache *nfs_searchdircache(struct vnode *, off_t, int, int *);
  258 struct nfsdircache *nfs_enterdircache(struct vnode *, off_t, off_t, int,
  259         daddr_t);
  260 void nfs_putdircache(struct nfsnode *, struct nfsdircache *);
  261 void nfs_invaldircache(struct vnode *, int);
  262 #define NFS_INVALDIRCACHE_FORCE         1
  263 #define NFS_INVALDIRCACHE_KEEPEOF       2
  264 void nfs_init(void);
  265 void nfs_fini(void);
  266 int nfsm_loadattrcache(struct vnode **, struct mbuf **, char **,
  267         struct vattr *, int flags);
  268 int nfs_loadattrcache(struct vnode **, struct nfs_fattr *, struct vattr *,
  269         int flags);
  270 int nfs_getattrcache(struct vnode *, struct vattr *);
  271 void nfs_delayedtruncate(struct vnode *);
  272 int nfs_check_wccdata(struct nfsnode *, const struct timespec *,
  273         struct timespec *, bool);
  274 int nfs_namei(struct nameidata *, nfsrvfh_t *, uint32_t, struct nfssvc_sock *,
  275         struct mbuf *, struct mbuf **, char **, struct vnode **, struct lwp *,
  276         int, int);
  277 void nfs_zeropad(struct mbuf *, int, int);
  278 void nfsm_srvwcc(struct nfsrv_descript *, int, struct vattr *, int,
  279         struct vattr *, struct mbuf **, char **);
  280 void nfsm_srvpostopattr(struct nfsrv_descript *, int, struct vattr *,
  281         struct mbuf **, char **);
  282 void nfsm_srvfattr(struct nfsrv_descript *, struct vattr *, struct nfs_fattr *);
  283 int nfsrv_fhtovp(nfsrvfh_t *, int, struct vnode **, kauth_cred_t,
  284         struct nfssvc_sock *, struct mbuf *, int *, int, int);
  285 int nfs_ispublicfh(const nfsrvfh_t *);
  286 int netaddr_match(int, union nethostaddr *, struct mbuf *);
  287 time_t nfs_attrtimeo(struct nfsmount *, struct nfsnode *);
  288 
  289 /* flags for nfs_loadattrcache and friends */
  290 #define NAC_NOTRUNC     1       /* don't truncate file size */
  291 
  292 void nfs_clearcommit(struct mount *);
  293 void nfs_merge_commit_ranges(struct vnode *);
  294 int nfs_in_committed_range(struct vnode *, off_t, off_t);
  295 int nfs_in_tobecommitted_range(struct vnode *, off_t, off_t);
  296 void nfs_add_committed_range(struct vnode *, off_t, off_t);
  297 void nfs_del_committed_range(struct vnode *, off_t, off_t);
  298 void nfs_add_tobecommitted_range(struct vnode *, off_t, off_t);
  299 void nfs_del_tobecommitted_range(struct vnode *, off_t, off_t);
  300 
  301 int nfsrv_errmap(struct nfsrv_descript *, int);
  302 void nfs_cookieheuristic(struct vnode *, int *, struct lwp *, kauth_cred_t);
  303 
  304 u_int32_t nfs_getxid(void);
  305 void nfs_renewxid(struct nfsreq *);
  306 
  307 int nfsrv_composefh(struct vnode *, nfsrvfh_t *, bool);
  308 int nfsrv_comparefh(const nfsrvfh_t *, const nfsrvfh_t *);
  309 void nfsrv_copyfh(nfsrvfh_t *, const nfsrvfh_t *);
  310 
  311 extern const enum vtype nv2tov_type[8];
  312 extern const enum vtype nv3tov_type[8];
  313 
  314 extern u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers,
  315         rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr,
  316         rpc_auth_kerb;
  317 extern u_int32_t nfs_prog;
  318 extern const int nfsv3_procid[NFS_NPROCS];
  319 extern int nfs_ticks;
  320 
  321 /* nfs_syscalls.c */
  322 struct sys_getfh_args;
  323 struct sys_nfssvc_args;
  324 int sys_getfh(struct lwp *, const struct sys_getfh_args *, register_t *);
  325 int sys_nfssvc(struct lwp *, const struct sys_nfssvc_args *, register_t *);
  326 int nfssvc_addsock(struct file *, struct mbuf *);
  327 int nfssvc_nfsd(struct nfsd_srvargs *, void *, struct lwp *);
  328 void nfsrv_zapsock(struct nfssvc_sock *);
  329 void nfsrv_slpderef(struct nfssvc_sock *);
  330 void nfsrv_init(int);
  331 void nfsrv_fini(void);
  332 void nfs_iodinit(void);
  333 void nfs_iodfini(void);
  334 int nfs_set_niothreads(int);
  335 int nfs_getauth(struct nfsmount *, struct nfsreq *, kauth_cred_t, char **,
  336         int *, char *, int *, NFSKERBKEY_T);
  337 int nfs_getnickauth(struct nfsmount *, kauth_cred_t, char **, int *, char *,
  338         int);
  339 int nfs_savenickauth(struct nfsmount *, kauth_cred_t, int, NFSKERBKEY_T,
  340         struct mbuf **, char **, struct mbuf *);
  341 
  342 /* nfs_export.c */
  343 extern struct nfs_public nfs_pub;
  344 int mountd_set_exports_list(const struct mountd_exports_list *, struct lwp *,
  345     struct mount *);
  346 int netexport_check(const fsid_t *, struct mbuf *, struct mount **, int *,
  347     kauth_cred_t *);
  348 void netexport_rdlock(void);
  349 void netexport_rdunlock(void);
  350 void netexport_init(void);
  351 void netexport_fini(void);
  352 #endif /* _KERNEL */

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