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  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/9.0/sys/fs/nwfs/nwfs_vfsops.c 213363 2010-10-02 17:58:57Z alc $
   27  */
   28 
   29 #include <sys/param.h>
   30 #include <sys/systm.h>
   31 #include <sys/proc.h>
   32 #include <sys/kernel.h>
   33 #include <sys/sysctl.h>
   34 #include <sys/vnode.h>
   35 #include <sys/mount.h>
   36 #include <sys/stat.h>
   37 #include <sys/malloc.h>
   38 #include <sys/bio.h>
   39 #include <sys/buf.h>
   40 
   41 #include <netncp/ncp.h>
   42 #include <netncp/ncp_conn.h>
   43 #include <netncp/ncp_subr.h>
   44 #include <netncp/ncp_ncp.h>
   45 #include <netncp/ncp_nls.h>
   46 
   47 #include <fs/nwfs/nwfs.h>
   48 #include <fs/nwfs/nwfs_node.h>
   49 #include <fs/nwfs/nwfs_subr.h>
   50 
   51 int nwfs_debuglevel = 0;
   52 
   53 static int nwfs_version = NWFS_VERSION;
   54 
   55 SYSCTL_DECL(_vfs_nwfs);
   56 SYSCTL_NODE(_vfs, OID_AUTO, nwfs, CTLFLAG_RW, 0, "Netware filesystem");
   57 SYSCTL_INT(_vfs_nwfs, OID_AUTO, version, CTLFLAG_RD, &nwfs_version, 0, "");
   58 SYSCTL_INT(_vfs_nwfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nwfs_debuglevel, 0, "");
   59 
   60 MODULE_DEPEND(nwfs, ncp, 1, 1, 1);
   61 MODULE_DEPEND(nwfs, libmchain, 1, 1, 1);
   62 
   63 static vfs_cmount_t     nwfs_cmount;
   64 static vfs_mount_t      nwfs_mount;
   65 static vfs_quotactl_t   nwfs_quotactl;
   66 static vfs_root_t       nwfs_root;
   67 static vfs_statfs_t     nwfs_statfs;
   68 static vfs_unmount_t    nwfs_unmount;
   69 static vfs_init_t       nwfs_init;
   70 static vfs_uninit_t     nwfs_uninit;
   71 
   72 static struct vfsops nwfs_vfsops = {
   73         .vfs_init =             nwfs_init,
   74         .vfs_mount =            nwfs_mount,
   75         .vfs_cmount =           nwfs_cmount,
   76         .vfs_quotactl =         nwfs_quotactl,
   77         .vfs_root =             nwfs_root,
   78         .vfs_statfs =           nwfs_statfs,
   79         .vfs_sync =             vfs_stdsync,
   80         .vfs_uninit =           nwfs_uninit,
   81         .vfs_unmount =          nwfs_unmount,
   82 };
   83 
   84 
   85 VFS_SET(nwfs_vfsops, nwfs, VFCF_NETWORK);
   86 
   87 int nwfs_pbuf_freecnt = -1;     /* start out unlimited */
   88 static int nwfsid = 1;
   89 
   90 static int
   91 nwfs_initnls(struct nwmount *nmp) {
   92         char    *pc, *pe;
   93         int     error = 0;
   94 #define COPY_TABLE(t,d) { \
   95                 if (t) { \
   96                         error = copyin((t), pc, 256); \
   97                         if (error) break; \
   98                 } else \
   99                         bcopy(d, pc, 256); \
  100                 (t) = pc; pc += 256; \
  101         }
  102 
  103         nmp->m.nls.opt |= NWHP_NLS | NWHP_DOS;
  104         if ((nmp->m.flags & NWFS_MOUNT_HAVE_NLS) == 0) {
  105                 nmp->m.nls.to_lower = ncp_defnls.to_lower;
  106                 nmp->m.nls.to_upper = ncp_defnls.to_upper;
  107                 nmp->m.nls.n2u = ncp_defnls.n2u;
  108                 nmp->m.nls.u2n = ncp_defnls.u2n;
  109                 return 0;
  110         }
  111         pe = malloc(256 * 4, M_NWFSDATA, M_WAITOK);
  112         pc = pe;
  113         do {
  114                 COPY_TABLE(nmp->m.nls.to_lower, ncp_defnls.to_lower);
  115                 COPY_TABLE(nmp->m.nls.to_upper, ncp_defnls.to_upper);
  116                 COPY_TABLE(nmp->m.nls.n2u, ncp_defnls.n2u);
  117                 COPY_TABLE(nmp->m.nls.u2n, ncp_defnls.u2n);
  118         } while(0);
  119         if (error) {
  120                 free(pe, M_NWFSDATA);
  121                 return error;
  122         }
  123         return 0;
  124 }
  125 
  126 static int nwfs_cmount(struct mntarg *ma, void *data, int flags)
  127 {
  128         struct nwfs_args args;    /* will hold data from mount request */
  129         int error;
  130 
  131         error = copyin(data, &args, sizeof(struct nwfs_args));
  132         if (error)
  133                 return (error);
  134 
  135         /*
  136          * XXX: cheap cop-out here, args contains a structure I don't
  137          * XXX: know how we should handle, and I don't see any immediate
  138          * XXX: prospect of avoiding a mount_nwfs(8) binary anyway.
  139          */
  140         ma = mount_arg(ma, "nwfs_args", &args, sizeof args);
  141 
  142         error = kernel_mount(ma, flags);
  143 
  144         return (error);
  145 }
  146 
  147 /*
  148  * mp - path - addr in user space of mount point (ie /usr or whatever)
  149  * data - addr in user space of mount params 
  150  */
  151 static int nwfs_mount(struct mount *mp)
  152 {
  153         struct nwfs_args args;    /* will hold data from mount request */
  154         int error;
  155         struct nwmount *nmp = NULL;
  156         struct ncp_conn *conn = NULL;
  157         struct ncp_handle *handle = NULL;
  158         struct vnode *vp;
  159         struct thread *td;
  160         char *pc,*pe;
  161 
  162         td = curthread;
  163         if (mp->mnt_flag & MNT_ROOTFS)
  164                 return (EOPNOTSUPP);
  165         if (mp->mnt_flag & MNT_UPDATE) {
  166                 nwfs_printf("MNT_UPDATE not implemented");
  167                 return (EOPNOTSUPP);
  168         }
  169         error = vfs_copyopt(mp->mnt_optnew, "nwfs_args", &args, sizeof args);
  170         if (error)
  171                 return (error);
  172         if (args.version != NWFS_VERSION) {
  173                 nwfs_printf("mount version mismatch: kernel=%d, mount=%d\n",NWFS_VERSION,args.version);
  174                 return (1);
  175         }
  176         error = ncp_conn_getbyref(args.connRef, td , td->td_ucred,NCPM_EXECUTE,&conn);
  177         if (error) {
  178                 nwfs_printf("invalid connection refernce %d\n",args.connRef);
  179                 return (error);
  180         }
  181         error = ncp_conn_gethandle(conn, NULL, &handle);
  182         if (error) {
  183                 nwfs_printf("can't get connection handle\n");
  184                 return (error);
  185         }
  186         ncp_conn_unlock(conn, td);      /* we keep the ref */
  187         mp->mnt_stat.f_iosize = conn->buffer_size;
  188         /* We must malloc our own mount info */
  189         nmp = malloc(sizeof(struct nwmount), M_NWFSDATA, M_WAITOK | M_ZERO);
  190         if (nmp == NULL) {
  191                 nwfs_printf("could not alloc nwmount\n");
  192                 error = ENOMEM;
  193                 goto bad;
  194         }
  195         mp->mnt_data = nmp;
  196         nmp->connh = handle;
  197         nmp->n_root = NULL;
  198         nmp->n_id = nwfsid++;
  199         nmp->m = args;
  200         nmp->m.file_mode = (nmp->m.file_mode &
  201                             (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
  202         nmp->m.dir_mode  = (nmp->m.dir_mode &
  203                             (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
  204         if ((error = nwfs_initnls(nmp)) != 0) goto bad;
  205         pc = mp->mnt_stat.f_mntfromname;
  206         pe = pc+sizeof(mp->mnt_stat.f_mntfromname);
  207         bzero(pc, MNAMELEN);
  208         *(pc++) = '/';
  209         pc = index(strncpy(pc, conn->li.server, pe-pc-2),0);
  210         if (pc < pe-1) {
  211                 *(pc++) = ':';
  212                 pc=index(strncpy(pc, conn->li.user, pe-pc-2),0);
  213                 if (pc < pe-1) {
  214                         *(pc++) = '/';
  215                         strncpy(pc, nmp->m.mounted_vol, pe-pc-2);
  216                 }
  217         }
  218         /* protect against invalid mount points */
  219         nmp->m.mount_point[sizeof(nmp->m.mount_point)-1] = '\0';
  220         vfs_getnewfsid(mp);
  221         error = nwfs_root(mp, LK_EXCLUSIVE, &vp);
  222         if (error)
  223                 goto bad;
  224         /*
  225          * Lose the lock but keep the ref.
  226          */
  227         VOP_UNLOCK(vp, 0);
  228         NCPVODEBUG("rootvp.vrefcnt=%d\n",vrefcnt(vp));
  229         return error;
  230 bad:
  231         if (nmp)
  232                 free(nmp, M_NWFSDATA);
  233         if (handle)
  234                 ncp_conn_puthandle(handle, NULL, 0);
  235         return error;
  236 }
  237 
  238 /* Unmount the filesystem described by mp. */
  239 static int
  240 nwfs_unmount(struct mount *mp, int mntflags)
  241 {
  242         struct thread *td;
  243         struct nwmount *nmp = VFSTONWFS(mp);
  244         struct ncp_conn *conn;
  245         int error, flags;
  246 
  247         NCPVODEBUG("nwfs_unmount: flags=%04x\n",mntflags);
  248         td = curthread;
  249         flags = 0;
  250         if (mntflags & MNT_FORCE)
  251                 flags |= FORCECLOSE;
  252         /* There is 1 extra root vnode reference from nwfs_mount(). */
  253         error = vflush(mp, 1, flags, td);
  254         if (error)
  255                 return (error);
  256         conn = NWFSTOCONN(nmp);
  257         ncp_conn_puthandle(nmp->connh,NULL,0);
  258         if (ncp_conn_lock(conn, td, td->td_ucred,NCPM_WRITE | NCPM_EXECUTE) == 0) {
  259                 if(ncp_conn_free(conn))
  260                         ncp_conn_unlock(conn, td);
  261         }
  262         mp->mnt_data = NULL;
  263         if (nmp->m.flags & NWFS_MOUNT_HAVE_NLS)
  264                 free(nmp->m.nls.to_lower, M_NWFSDATA);
  265         free(nmp, M_NWFSDATA);
  266         MNT_ILOCK(mp);
  267         mp->mnt_flag &= ~MNT_LOCAL;
  268         MNT_IUNLOCK(mp);
  269         return (error);
  270 }
  271 
  272 /*  Return locked vnode to root of a filesystem */
  273 static int
  274 nwfs_root(struct mount *mp, int flags, struct vnode **vpp) {
  275         struct vnode *vp;
  276         struct nwmount *nmp;
  277         struct nwnode *np;
  278         struct ncp_conn *conn;
  279         struct nw_entry_info fattr;
  280         struct thread *td;
  281         struct ucred *cred;
  282         int error, nsf, opt;
  283         u_char vol;
  284 
  285         td = curthread;
  286         cred = td->td_ucred;
  287 
  288         nmp = VFSTONWFS(mp);
  289         conn = NWFSTOCONN(nmp);
  290         if (nmp->n_root) {
  291                 *vpp = NWTOV(nmp->n_root);
  292                 while (vget(*vpp, LK_EXCLUSIVE, curthread) != 0)
  293                         ;
  294                 return 0;
  295         }
  296         error = ncp_lookup_volume(conn, nmp->m.mounted_vol, &vol, 
  297                 &nmp->n_rootent.f_id, td, cred);
  298         if (error)
  299                 return ENOENT;
  300         nmp->n_volume = vol;
  301         error = ncp_get_namespaces(conn, vol, &nsf, td, cred);
  302         if (error)
  303                 return ENOENT;
  304         if (nsf & NW_NSB_OS2) {
  305                 NCPVODEBUG("volume %s has os2 namespace\n",nmp->m.mounted_vol);
  306                 if ((nmp->m.flags & NWFS_MOUNT_NO_OS2) == 0) {
  307                         nmp->name_space = NW_NS_OS2;
  308                         nmp->m.nls.opt &= ~NWHP_DOS;
  309                 }
  310         }
  311         opt = nmp->m.nls.opt;
  312         nsf = opt & (NWHP_UPPER | NWHP_LOWER);
  313         if (opt & NWHP_DOS) {
  314                 if (nsf == (NWHP_UPPER | NWHP_LOWER)) {
  315                         nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER);
  316                 } else if (nsf == 0) {
  317                         nmp->m.nls.opt |= NWHP_LOWER;
  318                 }
  319         } else {
  320                 if (nsf == (NWHP_UPPER | NWHP_LOWER)) {
  321                         nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER);
  322                 }
  323         }
  324         if (nmp->m.root_path[0]) {
  325                 nmp->m.root_path[0]--;
  326                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
  327                     -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred);
  328                 if (error) {
  329                         NCPFATAL("Invalid root path specified\n");
  330                         return ENOENT;
  331                 }
  332                 nmp->n_rootent.f_parent = fattr.dirEntNum;
  333                 nmp->m.root_path[0]++;
  334                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
  335                     -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred);
  336                 if (error) {
  337                         NCPFATAL("Invalid root path specified\n");
  338                         return ENOENT;
  339                 }
  340                 nmp->n_rootent.f_id = fattr.dirEntNum;
  341         } else {
  342                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
  343                     0, NULL, &fattr, td, cred);
  344                 if (error) {
  345                         NCPFATAL("Can't obtain volume info\n");
  346                         return ENOENT;
  347                 }
  348                 fattr.nameLen = strlen(strcpy(fattr.entryName, "#.ROOT"));
  349                 nmp->n_rootent.f_parent = nmp->n_rootent.f_id;
  350         }
  351         error = nwfs_nget(mp, nmp->n_rootent, &fattr, NULL, &vp);
  352         if (error)
  353                 return (error);
  354         vp->v_vflag |= VV_ROOT;
  355         np = VTONW(vp);
  356         if (nmp->m.root_path[0] == 0)
  357                 np->n_flag |= NVOLUME;
  358         nmp->n_root = np;
  359 /*      error = VOP_GETATTR(vp, &vattr, cred, td);
  360         if (error) {
  361                 vput(vp);
  362                 NCPFATAL("Can't get root directory entry\n");
  363                 return error;
  364         }*/
  365         *vpp = vp;
  366         return (0);
  367 }
  368 
  369 /*
  370  * Do operations associated with quotas, not supported
  371  */
  372 /* ARGSUSED */
  373 static int
  374 nwfs_quotactl(mp, cmd, uid, arg)
  375         struct mount *mp;
  376         int cmd;
  377         uid_t uid;
  378         void *arg;
  379 {
  380         NCPVODEBUG("return EOPNOTSUPP\n");
  381         return (EOPNOTSUPP);
  382 }
  383 
  384 /*ARGSUSED*/
  385 int
  386 nwfs_init(struct vfsconf *vfsp)
  387 {
  388         nwfs_hash_init();
  389         nwfs_pbuf_freecnt = nswbuf / 2 + 1;
  390         NCPVODEBUG("always happy to load!\n");
  391         return (0);
  392 }
  393 
  394 /*ARGSUSED*/
  395 int
  396 nwfs_uninit(struct vfsconf *vfsp)
  397 {
  398 
  399         nwfs_hash_free();
  400         NCPVODEBUG("unloaded\n");
  401         return (0);
  402 }
  403 
  404 /*
  405  * nwfs_statfs call
  406  */
  407 int
  408 nwfs_statfs(mp, sbp)
  409         struct mount *mp;
  410         struct statfs *sbp;
  411 {
  412         struct nwmount *nmp = VFSTONWFS(mp);
  413         struct thread *td = curthread;
  414         int error = 0, secsize;
  415         struct nwnode *np = nmp->n_root;
  416         struct ncp_volume_info vi;
  417 
  418         if (np == NULL) return EINVAL;
  419         error = ncp_get_volume_info_with_number(NWFSTOCONN(nmp),
  420             nmp->n_volume, &vi, td, td->td_ucred);
  421         if (error) return error;
  422         secsize = 512;                  /* XXX how to get real value ??? */
  423         /* fundamental filesystem block size */
  424         sbp->f_bsize = vi.sectors_per_block*secsize;
  425         /* optimal transfer block size */
  426         sbp->f_iosize = NWFSTOCONN(nmp)->buffer_size;
  427         /* total data blocks in filesystem */
  428         sbp->f_blocks= vi.total_blocks;
  429         /* free blocks in fs */
  430         sbp->f_bfree = vi.free_blocks + vi.purgeable_blocks;
  431         /* free blocks avail to non-superuser */
  432         sbp->f_bavail= vi.free_blocks+vi.purgeable_blocks;
  433         /* total file nodes in filesystem */
  434         sbp->f_files = vi.total_dir_entries;
  435         /* free file nodes in fs */
  436         sbp->f_ffree = vi.available_dir_entries;
  437         sbp->f_flags = 0;               /* copy of mount exported flags */
  438         return 0;
  439 }

Cache object: 350640d33563a812adf3c00df5bedd11


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