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/fs/nwfs/nwfs_vfsops.c

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    1 /*-
    2  * Copyright (c) 1999, 2000 Boris Popov
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *    This product includes software developed by Boris Popov.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * $FreeBSD: releng/8.4/sys/fs/nwfs/nwfs_vfsops.c 191990 2009-05-11 15:33:26Z attilio $
   33  */
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/proc.h>
   38 #include <sys/kernel.h>
   39 #include <sys/sysctl.h>
   40 #include <sys/vnode.h>
   41 #include <sys/mount.h>
   42 #include <sys/stat.h>
   43 #include <sys/malloc.h>
   44 #include <sys/bio.h>
   45 #include <sys/buf.h>
   46 
   47 #include <netncp/ncp.h>
   48 #include <netncp/ncp_conn.h>
   49 #include <netncp/ncp_subr.h>
   50 #include <netncp/ncp_ncp.h>
   51 #include <netncp/ncp_nls.h>
   52 
   53 #include <fs/nwfs/nwfs.h>
   54 #include <fs/nwfs/nwfs_node.h>
   55 #include <fs/nwfs/nwfs_subr.h>
   56 
   57 int nwfs_debuglevel = 0;
   58 
   59 static int nwfs_version = NWFS_VERSION;
   60 
   61 SYSCTL_DECL(_vfs_nwfs);
   62 SYSCTL_NODE(_vfs, OID_AUTO, nwfs, CTLFLAG_RW, 0, "Netware filesystem");
   63 SYSCTL_INT(_vfs_nwfs, OID_AUTO, version, CTLFLAG_RD, &nwfs_version, 0, "");
   64 SYSCTL_INT(_vfs_nwfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nwfs_debuglevel, 0, "");
   65 
   66 MODULE_DEPEND(nwfs, ncp, 1, 1, 1);
   67 MODULE_DEPEND(nwfs, libmchain, 1, 1, 1);
   68 
   69 static vfs_cmount_t     nwfs_cmount;
   70 static vfs_mount_t      nwfs_mount;
   71 static vfs_quotactl_t   nwfs_quotactl;
   72 static vfs_root_t       nwfs_root;
   73 static vfs_statfs_t     nwfs_statfs;
   74 static vfs_unmount_t    nwfs_unmount;
   75 static vfs_init_t       nwfs_init;
   76 static vfs_uninit_t     nwfs_uninit;
   77 
   78 static struct vfsops nwfs_vfsops = {
   79         .vfs_init =             nwfs_init,
   80         .vfs_mount =            nwfs_mount,
   81         .vfs_cmount =           nwfs_cmount,
   82         .vfs_quotactl =         nwfs_quotactl,
   83         .vfs_root =             nwfs_root,
   84         .vfs_statfs =           nwfs_statfs,
   85         .vfs_sync =             vfs_stdsync,
   86         .vfs_uninit =           nwfs_uninit,
   87         .vfs_unmount =          nwfs_unmount,
   88 };
   89 
   90 
   91 VFS_SET(nwfs_vfsops, nwfs, VFCF_NETWORK);
   92 
   93 int nwfs_pbuf_freecnt = -1;     /* start out unlimited */
   94 static int nwfsid = 1;
   95 
   96 static int
   97 nwfs_initnls(struct nwmount *nmp) {
   98         char    *pc, *pe;
   99         int     error = 0;
  100 #define COPY_TABLE(t,d) { \
  101                 if (t) { \
  102                         error = copyin((t), pc, 256); \
  103                         if (error) break; \
  104                 } else \
  105                         bcopy(d, pc, 256); \
  106                 (t) = pc; pc += 256; \
  107         }
  108 
  109         nmp->m.nls.opt |= NWHP_NLS | NWHP_DOS;
  110         if ((nmp->m.flags & NWFS_MOUNT_HAVE_NLS) == 0) {
  111                 nmp->m.nls.to_lower = ncp_defnls.to_lower;
  112                 nmp->m.nls.to_upper = ncp_defnls.to_upper;
  113                 nmp->m.nls.n2u = ncp_defnls.n2u;
  114                 nmp->m.nls.u2n = ncp_defnls.u2n;
  115                 return 0;
  116         }
  117         pe = malloc(256 * 4, M_NWFSDATA, M_WAITOK);
  118         pc = pe;
  119         do {
  120                 COPY_TABLE(nmp->m.nls.to_lower, ncp_defnls.to_lower);
  121                 COPY_TABLE(nmp->m.nls.to_upper, ncp_defnls.to_upper);
  122                 COPY_TABLE(nmp->m.nls.n2u, ncp_defnls.n2u);
  123                 COPY_TABLE(nmp->m.nls.u2n, ncp_defnls.u2n);
  124         } while(0);
  125         if (error) {
  126                 free(pe, M_NWFSDATA);
  127                 return error;
  128         }
  129         return 0;
  130 }
  131 
  132 static int nwfs_cmount(struct mntarg *ma, void *data, int flags)
  133 {
  134         struct nwfs_args args;    /* will hold data from mount request */
  135         int error;
  136 
  137         error = copyin(data, &args, sizeof(struct nwfs_args));
  138         if (error)
  139                 return (error);
  140 
  141         /*
  142          * XXX: cheap cop-out here, args contains a structure I don't
  143          * XXX: know how we should handle, and I don't see any immediate
  144          * XXX: prospect of avoiding a mount_nwfs(8) binary anyway.
  145          */
  146         ma = mount_arg(ma, "nwfs_args", &args, sizeof args);
  147 
  148         error = kernel_mount(ma, flags);
  149 
  150         return (error);
  151 }
  152 
  153 /*
  154  * mp - path - addr in user space of mount point (ie /usr or whatever)
  155  * data - addr in user space of mount params 
  156  */
  157 static int nwfs_mount(struct mount *mp)
  158 {
  159         struct nwfs_args args;    /* will hold data from mount request */
  160         int error;
  161         struct nwmount *nmp = NULL;
  162         struct ncp_conn *conn = NULL;
  163         struct ncp_handle *handle = NULL;
  164         struct vnode *vp;
  165         struct thread *td;
  166         char *pc,*pe;
  167 
  168         td = curthread;
  169         if (mp->mnt_flag & MNT_ROOTFS)
  170                 return (EOPNOTSUPP);
  171         if (mp->mnt_flag & MNT_UPDATE) {
  172                 nwfs_printf("MNT_UPDATE not implemented");
  173                 return (EOPNOTSUPP);
  174         }
  175         error = vfs_copyopt(mp->mnt_optnew, "nwfs_args", &args, sizeof args);
  176         if (error)
  177                 return (error);
  178         if (args.version != NWFS_VERSION) {
  179                 nwfs_printf("mount version mismatch: kernel=%d, mount=%d\n",NWFS_VERSION,args.version);
  180                 return (1);
  181         }
  182         error = ncp_conn_getbyref(args.connRef, td , td->td_ucred,NCPM_EXECUTE,&conn);
  183         if (error) {
  184                 nwfs_printf("invalid connection refernce %d\n",args.connRef);
  185                 return (error);
  186         }
  187         error = ncp_conn_gethandle(conn, NULL, &handle);
  188         if (error) {
  189                 nwfs_printf("can't get connection handle\n");
  190                 return (error);
  191         }
  192         ncp_conn_unlock(conn, td);      /* we keep the ref */
  193         mp->mnt_stat.f_iosize = conn->buffer_size;
  194         /* We must malloc our own mount info */
  195         nmp = malloc(sizeof(struct nwmount),M_NWFSDATA,
  196             M_WAITOK | M_USE_RESERVE | M_ZERO);
  197         if (nmp == NULL) {
  198                 nwfs_printf("could not alloc nwmount\n");
  199                 error = ENOMEM;
  200                 goto bad;
  201         }
  202         mp->mnt_data = nmp;
  203         nmp->connh = handle;
  204         nmp->n_root = NULL;
  205         nmp->n_id = nwfsid++;
  206         nmp->m = args;
  207         nmp->m.file_mode = (nmp->m.file_mode &
  208                             (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
  209         nmp->m.dir_mode  = (nmp->m.dir_mode &
  210                             (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
  211         if ((error = nwfs_initnls(nmp)) != 0) goto bad;
  212         pc = mp->mnt_stat.f_mntfromname;
  213         pe = pc+sizeof(mp->mnt_stat.f_mntfromname);
  214         bzero(pc, MNAMELEN);
  215         *(pc++) = '/';
  216         pc = index(strncpy(pc, conn->li.server, pe-pc-2),0);
  217         if (pc < pe-1) {
  218                 *(pc++) = ':';
  219                 pc=index(strncpy(pc, conn->li.user, pe-pc-2),0);
  220                 if (pc < pe-1) {
  221                         *(pc++) = '/';
  222                         strncpy(pc, nmp->m.mounted_vol, pe-pc-2);
  223                 }
  224         }
  225         /* protect against invalid mount points */
  226         nmp->m.mount_point[sizeof(nmp->m.mount_point)-1] = '\0';
  227         vfs_getnewfsid(mp);
  228         error = nwfs_root(mp, LK_EXCLUSIVE, &vp);
  229         if (error)
  230                 goto bad;
  231         /*
  232          * Lose the lock but keep the ref.
  233          */
  234         VOP_UNLOCK(vp, 0);
  235         NCPVODEBUG("rootvp.vrefcnt=%d\n",vrefcnt(vp));
  236         return error;
  237 bad:
  238         if (nmp)
  239                 free(nmp, M_NWFSDATA);
  240         if (handle)
  241                 ncp_conn_puthandle(handle, NULL, 0);
  242         return error;
  243 }
  244 
  245 /* Unmount the filesystem described by mp. */
  246 static int
  247 nwfs_unmount(struct mount *mp, int mntflags)
  248 {
  249         struct thread *td;
  250         struct nwmount *nmp = VFSTONWFS(mp);
  251         struct ncp_conn *conn;
  252         int error, flags;
  253 
  254         NCPVODEBUG("nwfs_unmount: flags=%04x\n",mntflags);
  255         td = curthread;
  256         flags = 0;
  257         if (mntflags & MNT_FORCE)
  258                 flags |= FORCECLOSE;
  259         /* There is 1 extra root vnode reference from nwfs_mount(). */
  260         error = vflush(mp, 1, flags, td);
  261         if (error)
  262                 return (error);
  263         conn = NWFSTOCONN(nmp);
  264         ncp_conn_puthandle(nmp->connh,NULL,0);
  265         if (ncp_conn_lock(conn, td, td->td_ucred,NCPM_WRITE | NCPM_EXECUTE) == 0) {
  266                 if(ncp_conn_free(conn))
  267                         ncp_conn_unlock(conn, td);
  268         }
  269         mp->mnt_data = NULL;
  270         if (nmp->m.flags & NWFS_MOUNT_HAVE_NLS)
  271                 free(nmp->m.nls.to_lower, M_NWFSDATA);
  272         free(nmp, M_NWFSDATA);
  273         MNT_ILOCK(mp);
  274         mp->mnt_flag &= ~MNT_LOCAL;
  275         MNT_IUNLOCK(mp);
  276         return (error);
  277 }
  278 
  279 /*  Return locked vnode to root of a filesystem */
  280 static int
  281 nwfs_root(struct mount *mp, int flags, struct vnode **vpp) {
  282         struct vnode *vp;
  283         struct nwmount *nmp;
  284         struct nwnode *np;
  285         struct ncp_conn *conn;
  286         struct nw_entry_info fattr;
  287         struct thread *td;
  288         struct ucred *cred;
  289         int error, nsf, opt;
  290         u_char vol;
  291 
  292         td = curthread;
  293         cred = td->td_ucred;
  294 
  295         nmp = VFSTONWFS(mp);
  296         conn = NWFSTOCONN(nmp);
  297         if (nmp->n_root) {
  298                 *vpp = NWTOV(nmp->n_root);
  299                 while (vget(*vpp, LK_EXCLUSIVE, curthread) != 0)
  300                         ;
  301                 return 0;
  302         }
  303         error = ncp_lookup_volume(conn, nmp->m.mounted_vol, &vol, 
  304                 &nmp->n_rootent.f_id, td, cred);
  305         if (error)
  306                 return ENOENT;
  307         nmp->n_volume = vol;
  308         error = ncp_get_namespaces(conn, vol, &nsf, td, cred);
  309         if (error)
  310                 return ENOENT;
  311         if (nsf & NW_NSB_OS2) {
  312                 NCPVODEBUG("volume %s has os2 namespace\n",nmp->m.mounted_vol);
  313                 if ((nmp->m.flags & NWFS_MOUNT_NO_OS2) == 0) {
  314                         nmp->name_space = NW_NS_OS2;
  315                         nmp->m.nls.opt &= ~NWHP_DOS;
  316                 }
  317         }
  318         opt = nmp->m.nls.opt;
  319         nsf = opt & (NWHP_UPPER | NWHP_LOWER);
  320         if (opt & NWHP_DOS) {
  321                 if (nsf == (NWHP_UPPER | NWHP_LOWER)) {
  322                         nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER);
  323                 } else if (nsf == 0) {
  324                         nmp->m.nls.opt |= NWHP_LOWER;
  325                 }
  326         } else {
  327                 if (nsf == (NWHP_UPPER | NWHP_LOWER)) {
  328                         nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER);
  329                 }
  330         }
  331         if (nmp->m.root_path[0]) {
  332                 nmp->m.root_path[0]--;
  333                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
  334                     -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred);
  335                 if (error) {
  336                         NCPFATAL("Invalid root path specified\n");
  337                         return ENOENT;
  338                 }
  339                 nmp->n_rootent.f_parent = fattr.dirEntNum;
  340                 nmp->m.root_path[0]++;
  341                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
  342                     -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred);
  343                 if (error) {
  344                         NCPFATAL("Invalid root path specified\n");
  345                         return ENOENT;
  346                 }
  347                 nmp->n_rootent.f_id = fattr.dirEntNum;
  348         } else {
  349                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
  350                     0, NULL, &fattr, td, cred);
  351                 if (error) {
  352                         NCPFATAL("Can't obtain volume info\n");
  353                         return ENOENT;
  354                 }
  355                 fattr.nameLen = strlen(strcpy(fattr.entryName, "#.ROOT"));
  356                 nmp->n_rootent.f_parent = nmp->n_rootent.f_id;
  357         }
  358         error = nwfs_nget(mp, nmp->n_rootent, &fattr, NULL, &vp);
  359         if (error)
  360                 return (error);
  361         vp->v_vflag |= VV_ROOT;
  362         np = VTONW(vp);
  363         if (nmp->m.root_path[0] == 0)
  364                 np->n_flag |= NVOLUME;
  365         nmp->n_root = np;
  366 /*      error = VOP_GETATTR(vp, &vattr, cred, td);
  367         if (error) {
  368                 vput(vp);
  369                 NCPFATAL("Can't get root directory entry\n");
  370                 return error;
  371         }*/
  372         *vpp = vp;
  373         return (0);
  374 }
  375 
  376 /*
  377  * Do operations associated with quotas, not supported
  378  */
  379 /* ARGSUSED */
  380 static int
  381 nwfs_quotactl(mp, cmd, uid, arg)
  382         struct mount *mp;
  383         int cmd;
  384         uid_t uid;
  385         void *arg;
  386 {
  387         NCPVODEBUG("return EOPNOTSUPP\n");
  388         return (EOPNOTSUPP);
  389 }
  390 
  391 /*ARGSUSED*/
  392 int
  393 nwfs_init(struct vfsconf *vfsp)
  394 {
  395         nwfs_hash_init();
  396         nwfs_pbuf_freecnt = nswbuf / 2 + 1;
  397         NCPVODEBUG("always happy to load!\n");
  398         return (0);
  399 }
  400 
  401 /*ARGSUSED*/
  402 int
  403 nwfs_uninit(struct vfsconf *vfsp)
  404 {
  405 
  406         nwfs_hash_free();
  407         NCPVODEBUG("unloaded\n");
  408         return (0);
  409 }
  410 
  411 /*
  412  * nwfs_statfs call
  413  */
  414 int
  415 nwfs_statfs(mp, sbp)
  416         struct mount *mp;
  417         struct statfs *sbp;
  418 {
  419         struct nwmount *nmp = VFSTONWFS(mp);
  420         struct thread *td = curthread;
  421         int error = 0, secsize;
  422         struct nwnode *np = nmp->n_root;
  423         struct ncp_volume_info vi;
  424 
  425         if (np == NULL) return EINVAL;
  426         error = ncp_get_volume_info_with_number(NWFSTOCONN(nmp),
  427             nmp->n_volume, &vi, td, td->td_ucred);
  428         if (error) return error;
  429         secsize = 512;                  /* XXX how to get real value ??? */
  430         /* fundamental filesystem block size */
  431         sbp->f_bsize = vi.sectors_per_block*secsize;
  432         /* optimal transfer block size */
  433         sbp->f_iosize = NWFSTOCONN(nmp)->buffer_size;
  434         /* total data blocks in filesystem */
  435         sbp->f_blocks= vi.total_blocks;
  436         /* free blocks in fs */
  437         sbp->f_bfree = vi.free_blocks + vi.purgeable_blocks;
  438         /* free blocks avail to non-superuser */
  439         sbp->f_bavail= vi.free_blocks+vi.purgeable_blocks;
  440         /* total file nodes in filesystem */
  441         sbp->f_files = vi.total_dir_entries;
  442         /* free file nodes in fs */
  443         sbp->f_ffree = vi.available_dir_entries;
  444         sbp->f_flags = 0;               /* copy of mount exported flags */
  445         return 0;
  446 }

Cache object: 9f1741eaed44c6615f8caf586940d987


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