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/6.0/sys/fs/nwfs/nwfs_vfsops.c 150786 2005-10-01 17:39:50Z phk $
   33  */
   34 #include "opt_ncp.h"
   35 #ifndef NCP
   36 #error "NWFS requires NCP protocol"
   37 #endif
   38 
   39 #include <sys/param.h>
   40 #include <sys/systm.h>
   41 #include <sys/proc.h>
   42 #include <sys/kernel.h>
   43 #include <sys/sysctl.h>
   44 #include <sys/vnode.h>
   45 #include <sys/mount.h>
   46 #include <sys/stat.h>
   47 #include <sys/malloc.h>
   48 #include <sys/bio.h>
   49 #include <sys/buf.h>
   50 
   51 #include <netncp/ncp.h>
   52 #include <netncp/ncp_conn.h>
   53 #include <netncp/ncp_subr.h>
   54 #include <netncp/ncp_ncp.h>
   55 #include <netncp/ncp_nls.h>
   56 
   57 #include <fs/nwfs/nwfs.h>
   58 #include <fs/nwfs/nwfs_node.h>
   59 #include <fs/nwfs/nwfs_subr.h>
   60 
   61 int nwfs_debuglevel = 0;
   62 
   63 static int nwfs_version = NWFS_VERSION;
   64 
   65 SYSCTL_DECL(_vfs_nwfs);
   66 SYSCTL_NODE(_vfs, OID_AUTO, nwfs, CTLFLAG_RW, 0, "Netware filesystem");
   67 SYSCTL_INT(_vfs_nwfs, OID_AUTO, version, CTLFLAG_RD, &nwfs_version, 0, "");
   68 SYSCTL_INT(_vfs_nwfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nwfs_debuglevel, 0, "");
   69 
   70 MODULE_DEPEND(nwfs, ncp, 1, 1, 1);
   71 MODULE_DEPEND(nwfs, libmchain, 1, 1, 1);
   72 
   73 static vfs_cmount_t     nwfs_cmount;
   74 static vfs_mount_t      nwfs_mount;
   75 static vfs_quotactl_t   nwfs_quotactl;
   76 static vfs_root_t       nwfs_root;
   77 static vfs_statfs_t     nwfs_statfs;
   78 static vfs_unmount_t    nwfs_unmount;
   79 static vfs_init_t       nwfs_init;
   80 static vfs_uninit_t     nwfs_uninit;
   81 
   82 static struct vfsops nwfs_vfsops = {
   83         .vfs_init =             nwfs_init,
   84         .vfs_mount =            nwfs_mount,
   85         .vfs_cmount =           nwfs_cmount,
   86         .vfs_quotactl =         nwfs_quotactl,
   87         .vfs_root =             nwfs_root,
   88         .vfs_statfs =           nwfs_statfs,
   89         .vfs_sync =             vfs_stdsync,
   90         .vfs_uninit =           nwfs_uninit,
   91         .vfs_unmount =          nwfs_unmount,
   92 };
   93 
   94 
   95 VFS_SET(nwfs_vfsops, nwfs, VFCF_NETWORK);
   96 
   97 int nwfs_pbuf_freecnt = -1;     /* start out unlimited */
   98 static int nwfsid = 1;
   99 
  100 static int
  101 nwfs_initnls(struct nwmount *nmp) {
  102         char    *pc, *pe;
  103         int     error = 0;
  104 #define COPY_TABLE(t,d) { \
  105                 if (t) { \
  106                         error = copyin((t), pc, 256); \
  107                         if (error) break; \
  108                 } else \
  109                         bcopy(d, pc, 256); \
  110                 (t) = pc; pc += 256; \
  111         }
  112 
  113         nmp->m.nls.opt |= NWHP_NLS | NWHP_DOS;
  114         if ((nmp->m.flags & NWFS_MOUNT_HAVE_NLS) == 0) {
  115                 nmp->m.nls.to_lower = ncp_defnls.to_lower;
  116                 nmp->m.nls.to_upper = ncp_defnls.to_upper;
  117                 nmp->m.nls.n2u = ncp_defnls.n2u;
  118                 nmp->m.nls.u2n = ncp_defnls.u2n;
  119                 return 0;
  120         }
  121         MALLOC(pe, char *, 256 * 4, M_NWFSDATA, M_WAITOK);
  122         pc = pe;
  123         do {
  124                 COPY_TABLE(nmp->m.nls.to_lower, ncp_defnls.to_lower);
  125                 COPY_TABLE(nmp->m.nls.to_upper, ncp_defnls.to_upper);
  126                 COPY_TABLE(nmp->m.nls.n2u, ncp_defnls.n2u);
  127                 COPY_TABLE(nmp->m.nls.u2n, ncp_defnls.u2n);
  128         } while(0);
  129         if (error) {
  130                 free(pe, M_NWFSDATA);
  131                 return error;
  132         }
  133         return 0;
  134 }
  135 
  136 static int nwfs_cmount(struct mntarg *ma, void *data, int flags,
  137                       struct thread *td)
  138 {
  139         struct nwfs_args args;    /* will hold data from mount request */
  140         int error;
  141 
  142         error = copyin(data, (caddr_t)&args, sizeof(struct nwfs_args));
  143         if (error)
  144                 return (error);
  145 
  146         /*
  147          * XXX: cheap cop-out here, args contains a structure I don't
  148          * XXX: know how we should handle, and I don't see any immediate
  149          * XXX: prospect of avoiding a mount_nwfs(8) binary anyway.
  150          */
  151         ma = mount_arg(ma, "nwfs_args", &args, sizeof args);
  152 
  153         error = kernel_mount(ma, flags);
  154 
  155         return (error);
  156 }
  157 
  158 /*
  159  * mp - path - addr in user space of mount point (ie /usr or whatever)
  160  * data - addr in user space of mount params 
  161  */
  162 static int nwfs_mount(struct mount *mp, struct thread *td)
  163 {
  164         struct nwfs_args args;    /* will hold data from mount request */
  165         int error;
  166         struct nwmount *nmp = NULL;
  167         struct ncp_conn *conn = NULL;
  168         struct ncp_handle *handle = NULL;
  169         struct vnode *vp;
  170         char *pc,*pe;
  171 
  172         if (mp->mnt_flag & MNT_ROOTFS)
  173                 return (EOPNOTSUPP);
  174         if (mp->mnt_flag & MNT_UPDATE) {
  175                 nwfs_printf("MNT_UPDATE not implemented");
  176                 return (EOPNOTSUPP);
  177         }
  178         error = vfs_copyopt(mp->mnt_optnew, "nwfs_args", &args, sizeof args);
  179         if (error)
  180                 return (error);
  181         if (args.version != NWFS_VERSION) {
  182                 nwfs_printf("mount version mismatch: kernel=%d, mount=%d\n",NWFS_VERSION,args.version);
  183                 return (1);
  184         }
  185         error = ncp_conn_getbyref(args.connRef, td , td->td_ucred,NCPM_EXECUTE,&conn);
  186         if (error) {
  187                 nwfs_printf("invalid connection refernce %d\n",args.connRef);
  188                 return (error);
  189         }
  190         error = ncp_conn_gethandle(conn, NULL, &handle);
  191         if (error) {
  192                 nwfs_printf("can't get connection handle\n");
  193                 return (error);
  194         }
  195         ncp_conn_unlock(conn, td);      /* we keep the ref */
  196         mp->mnt_stat.f_iosize = conn->buffer_size;
  197         /* We must malloc our own mount info */
  198         MALLOC(nmp,struct nwmount *,sizeof(struct nwmount),M_NWFSDATA,
  199             M_WAITOK | M_USE_RESERVE | M_ZERO);
  200         if (nmp == NULL) {
  201                 nwfs_printf("could not alloc nwmount\n");
  202                 error = ENOMEM;
  203                 goto bad;
  204         }
  205         mp->mnt_data = (qaddr_t)nmp;
  206         nmp->connh = handle;
  207         nmp->n_root = NULL;
  208         nmp->n_id = nwfsid++;
  209         nmp->m = args;
  210         nmp->m.file_mode = (nmp->m.file_mode &
  211                             (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
  212         nmp->m.dir_mode  = (nmp->m.dir_mode &
  213                             (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
  214         if ((error = nwfs_initnls(nmp)) != 0) goto bad;
  215         pc = mp->mnt_stat.f_mntfromname;
  216         pe = pc+sizeof(mp->mnt_stat.f_mntfromname);
  217         bzero(pc, MNAMELEN);
  218         *(pc++) = '/';
  219         pc = index(strncpy(pc, conn->li.server, pe-pc-2),0);
  220         if (pc < pe-1) {
  221                 *(pc++) = ':';
  222                 pc=index(strncpy(pc, conn->li.user, pe-pc-2),0);
  223                 if (pc < pe-1) {
  224                         *(pc++) = '/';
  225                         strncpy(pc, nmp->m.mounted_vol, pe-pc-2);
  226                 }
  227         }
  228         /* protect against invalid mount points */
  229         nmp->m.mount_point[sizeof(nmp->m.mount_point)-1] = '\0';
  230         vfs_getnewfsid(mp);
  231         error = nwfs_root(mp, LK_EXCLUSIVE, &vp, td);
  232         if (error)
  233                 goto bad;
  234         /*
  235          * Lose the lock but keep the ref.
  236          */
  237         VOP_UNLOCK(vp, 0, curthread);
  238         NCPVODEBUG("rootvp.vrefcnt=%d\n",vrefcnt(vp));
  239         return error;
  240 bad:
  241         if (nmp)
  242                 free(nmp, M_NWFSDATA);
  243         if (handle)
  244                 ncp_conn_puthandle(handle, NULL, 0);
  245         return error;
  246 }
  247 
  248 /* Unmount the filesystem described by mp. */
  249 static int
  250 nwfs_unmount(struct mount *mp, int mntflags, struct thread *td)
  251 {
  252         struct nwmount *nmp = VFSTONWFS(mp);
  253         struct ncp_conn *conn;
  254         int error, flags;
  255 
  256         NCPVODEBUG("nwfs_unmount: flags=%04x\n",mntflags);
  257         flags = 0;
  258         if (mntflags & MNT_FORCE)
  259                 flags |= FORCECLOSE;
  260         /* There is 1 extra root vnode reference from nwfs_mount(). */
  261         error = vflush(mp, 1, flags, td);
  262         if (error)
  263                 return (error);
  264         conn = NWFSTOCONN(nmp);
  265         ncp_conn_puthandle(nmp->connh,NULL,0);
  266         if (ncp_conn_lock(conn, td, td->td_ucred,NCPM_WRITE | NCPM_EXECUTE) == 0) {
  267                 if(ncp_conn_free(conn))
  268                         ncp_conn_unlock(conn, td);
  269         }
  270         mp->mnt_data = (qaddr_t)0;
  271         if (nmp->m.flags & NWFS_MOUNT_HAVE_NLS)
  272                 free(nmp->m.nls.to_lower, M_NWFSDATA);
  273         free(nmp, M_NWFSDATA);
  274         mp->mnt_flag &= ~MNT_LOCAL;
  275         return (error);
  276 }
  277 
  278 /*  Return locked vnode to root of a filesystem */
  279 static int
  280 nwfs_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td) {
  281         struct vnode *vp;
  282         struct nwmount *nmp;
  283         struct nwnode *np;
  284         struct ncp_conn *conn;
  285         struct nw_entry_info fattr;
  286         struct ucred *cred =  td->td_ucred;
  287         int error, nsf, opt;
  288         u_char vol;
  289 
  290         nmp = VFSTONWFS(mp);
  291         conn = NWFSTOCONN(nmp);
  292         if (nmp->n_root) {
  293                 *vpp = NWTOV(nmp->n_root);
  294                 while (vget(*vpp, LK_EXCLUSIVE, curthread) != 0)
  295                         ;
  296                 return 0;
  297         }
  298         error = ncp_lookup_volume(conn, nmp->m.mounted_vol, &vol, 
  299                 &nmp->n_rootent.f_id, td, cred);
  300         if (error)
  301                 return ENOENT;
  302         nmp->n_volume = vol;
  303         error = ncp_get_namespaces(conn, vol, &nsf, td, cred);
  304         if (error)
  305                 return ENOENT;
  306         if (nsf & NW_NSB_OS2) {
  307                 NCPVODEBUG("volume %s has os2 namespace\n",nmp->m.mounted_vol);
  308                 if ((nmp->m.flags & NWFS_MOUNT_NO_OS2) == 0) {
  309                         nmp->name_space = NW_NS_OS2;
  310                         nmp->m.nls.opt &= ~NWHP_DOS;
  311                 }
  312         }
  313         opt = nmp->m.nls.opt;
  314         nsf = opt & (NWHP_UPPER | NWHP_LOWER);
  315         if (opt & NWHP_DOS) {
  316                 if (nsf == (NWHP_UPPER | NWHP_LOWER)) {
  317                         nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER);
  318                 } else if (nsf == 0) {
  319                         nmp->m.nls.opt |= NWHP_LOWER;
  320                 }
  321         } else {
  322                 if (nsf == (NWHP_UPPER | NWHP_LOWER)) {
  323                         nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER);
  324                 }
  325         }
  326         if (nmp->m.root_path[0]) {
  327                 nmp->m.root_path[0]--;
  328                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
  329                     -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred);
  330                 if (error) {
  331                         NCPFATAL("Invalid root path specified\n");
  332                         return ENOENT;
  333                 }
  334                 nmp->n_rootent.f_parent = fattr.dirEntNum;
  335                 nmp->m.root_path[0]++;
  336                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
  337                     -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred);
  338                 if (error) {
  339                         NCPFATAL("Invalid root path specified\n");
  340                         return ENOENT;
  341                 }
  342                 nmp->n_rootent.f_id = fattr.dirEntNum;
  343         } else {
  344                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
  345                     0, NULL, &fattr, td, cred);
  346                 if (error) {
  347                         NCPFATAL("Can't obtain volume info\n");
  348                         return ENOENT;
  349                 }
  350                 fattr.nameLen = strlen(strcpy(fattr.entryName, "#.ROOT"));
  351                 nmp->n_rootent.f_parent = nmp->n_rootent.f_id;
  352         }
  353         error = nwfs_nget(mp, nmp->n_rootent, &fattr, NULL, &vp);
  354         if (error)
  355                 return (error);
  356         vp->v_vflag |= VV_ROOT;
  357         np = VTONW(vp);
  358         if (nmp->m.root_path[0] == 0)
  359                 np->n_flag |= NVOLUME;
  360         nmp->n_root = np;
  361 /*      error = VOP_GETATTR(vp, &vattr, cred, td);
  362         if (error) {
  363                 vput(vp);
  364                 NCPFATAL("Can't get root directory entry\n");
  365                 return error;
  366         }*/
  367         *vpp = vp;
  368         return (0);
  369 }
  370 
  371 /*
  372  * Do operations associated with quotas, not supported
  373  */
  374 /* ARGSUSED */
  375 static int
  376 nwfs_quotactl(mp, cmd, uid, arg, td)
  377         struct mount *mp;
  378         int cmd;
  379         uid_t uid;
  380         caddr_t arg;
  381         struct thread *td;
  382 {
  383         NCPVODEBUG("return EOPNOTSUPP\n");
  384         return (EOPNOTSUPP);
  385 }
  386 
  387 /*ARGSUSED*/
  388 int
  389 nwfs_init(struct vfsconf *vfsp)
  390 {
  391         nwfs_hash_init();
  392         nwfs_pbuf_freecnt = nswbuf / 2 + 1;
  393         NCPVODEBUG("always happy to load!\n");
  394         return (0);
  395 }
  396 
  397 /*ARGSUSED*/
  398 int
  399 nwfs_uninit(struct vfsconf *vfsp)
  400 {
  401 
  402         nwfs_hash_free();
  403         NCPVODEBUG("unloaded\n");
  404         return (0);
  405 }
  406 
  407 /*
  408  * nwfs_statfs call
  409  */
  410 int
  411 nwfs_statfs(mp, sbp, td)
  412         struct mount *mp;
  413         struct statfs *sbp;
  414         struct thread *td;
  415 {
  416         struct nwmount *nmp = VFSTONWFS(mp);
  417         int error = 0, secsize;
  418         struct nwnode *np = nmp->n_root;
  419         struct ncp_volume_info vi;
  420 
  421         if (np == NULL) return EINVAL;
  422         error = ncp_get_volume_info_with_number(NWFSTOCONN(nmp),
  423             nmp->n_volume, &vi, td, td->td_ucred);
  424         if (error) return error;
  425         secsize = 512;                  /* XXX how to get real value ??? */
  426         /* fundamental filesystem block size */
  427         sbp->f_bsize = vi.sectors_per_block*secsize;
  428         /* optimal transfer block size */
  429         sbp->f_iosize = NWFSTOCONN(nmp)->buffer_size;
  430         /* total data blocks in filesystem */
  431         sbp->f_blocks= vi.total_blocks;
  432         /* free blocks in fs */
  433         sbp->f_bfree = vi.free_blocks + vi.purgeable_blocks;
  434         /* free blocks avail to non-superuser */
  435         sbp->f_bavail= vi.free_blocks+vi.purgeable_blocks;
  436         /* total file nodes in filesystem */
  437         sbp->f_files = vi.total_dir_entries;
  438         /* free file nodes in fs */
  439         sbp->f_ffree = vi.available_dir_entries;
  440         sbp->f_flags = 0;               /* copy of mount exported flags */
  441         return 0;
  442 }

Cache object: 42c639b3edf69172c8ac7c1bb83aae26


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