sys/vfs/nwfs/nwfs_vfsops.c

   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: src/sys/nwfs/nwfs_vfsops.c,v 1.6.2.6 2001/10/25 19:18:54 dillon Exp $
  33  * $DragonFly: src/sys/vfs/nwfs/nwfs_vfsops.c,v 1.30 2008/01/06 16:55:53 swildner Exp $
  34  */
  35 #include "opt_ncp.h"
  36 #ifndef NCP
  37 #error "NWFS requires NCP protocol"
  38 #endif
  39
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42 #include <sys/proc.h>
  43 #include <sys/kernel.h>
  44 #include <sys/sysctl.h>
  45 #include <sys/vnode.h>
  46 #include <sys/mount.h>
  47 #include <sys/stat.h>
  48 #include <sys/malloc.h>
  49 #include <sys/buf.h>
  50
  51 #include <netproto/ncp/ncp.h>
  52 #include <netproto/ncp/ncp_conn.h>
  53 #include <netproto/ncp/ncp_subr.h>
  54 #include <netproto/ncp/ncp_ncp.h>
  55 #include <netproto/ncp/ncp_nls.h>
  56
  57 #include "nwfs.h"
  58 #include "nwfs_node.h"
  59 #include "nwfs_subr.h"
  60
  61 extern struct vop_ops nwfs_vnode_vops;
  62
  63 int nwfs_debuglevel = 0;
  64
  65 static int nwfs_version = NWFS_VERSION;
  66
  67 SYSCTL_DECL(_vfs_nwfs);
  68 SYSCTL_NODE(_vfs, OID_AUTO, nwfs, CTLFLAG_RW, 0, "Netware file system");
  69 SYSCTL_INT(_vfs_nwfs, OID_AUTO, version, CTLFLAG_RD, &nwfs_version, 0, "");
  70 SYSCTL_INT(_vfs_nwfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nwfs_debuglevel, 0, "");
  71
  72 static int nwfs_mount(struct mount *, char *, caddr_t, struct ucred *);
  73 static int nwfs_root(struct mount *, struct vnode **);
  74 static int nwfs_statfs(struct mount *, struct statfs *, struct ucred *);
  75 static int nwfs_sync(struct mount *, int);
  76 static int nwfs_unmount(struct mount *, int);
  77 static int nwfs_init(struct vfsconf *vfsp);
  78 static int nwfs_uninit(struct vfsconf *vfsp);
  79
  80 static struct vfsops nwfs_vfsops = {
  81         .vfs_mount =            nwfs_mount,
  82         .vfs_unmount =          nwfs_unmount,
  83         .vfs_root =             nwfs_root,
  84         .vfs_statfs =           nwfs_statfs,
  85         .vfs_sync =             nwfs_sync,
  86         .vfs_init =             nwfs_init,
  87         .vfs_uninit =           nwfs_uninit
  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         MALLOC(pe, char *, 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                 kfree(pe, M_NWFSDATA);
 127                 return error;
 128         }
 129         return 0;
 130 }
 131 /*
 132  * mp - path - addr in user space of mount point (ie /usr or whatever)
 133  * data - addr in user space of mount params
 134  */
 135 static int
 136 nwfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
 137 {
 138         struct nwfs_args args;    /* will hold data from mount request */
 139         int error;
 140         struct nwmount *nmp = NULL;
 141         struct ncp_conn *conn = NULL;
 142         struct ncp_handle *handle = NULL;
 143         struct vnode *vp;
 144         char *pc,*pe;
 145
 146         if (data == NULL) {
 147                 nwfs_printf("missing data argument\n");
 148                 return 1;
 149         }
 150         if (mp->mnt_flag & MNT_UPDATE) {
 151                 nwfs_printf("MNT_UPDATE not implemented");
 152                 return (EOPNOTSUPP);
 153         }
 154         error = copyin(data, (caddr_t)&args, sizeof(struct nwfs_args));
 155         if (error)
 156                 return (error);
 157         if (args.version != NWFS_VERSION) {
 158                 nwfs_printf("mount version mismatch: kernel=%d, mount=%d\n",NWFS_VERSION,args.version);
 159                 return (1);
 160         }
 161         error = ncp_conn_getbyref(args.connRef,curthread,cred,NCPM_EXECUTE,&conn);
 162         if (error) {
 163                 nwfs_printf("invalid connection reference %d\n",args.connRef);
 164                 return (error);
 165         }
 166         error = ncp_conn_gethandle(conn, NULL, &handle);
 167         if (error) {
 168                 nwfs_printf("can't get connection handle\n");
 169                 return (error);
 170         }
 171         ncp_conn_unlock(conn,curthread);        /* we keep the ref */
 172         mp->mnt_stat.f_iosize = conn->buffer_size;
 173         /* We must malloc our own mount info */
 174         MALLOC(nmp,struct nwmount *,sizeof(struct nwmount),M_NWFSDATA, M_WAITOK|M_USE_RESERVE|M_ZERO);
 175         mp->mnt_data = (qaddr_t)nmp;
 176         nmp->connh = handle;
 177         nmp->n_root = NULL;
 178         nmp->n_id = nwfsid++;
 179         nmp->m = args;
 180         nmp->m.file_mode = (nmp->m.file_mode &
 181                             (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
 182         nmp->m.dir_mode  = (nmp->m.dir_mode &
 183                             (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
 184         if ((error = nwfs_initnls(nmp)) != 0) goto bad;
 185         pc = mp->mnt_stat.f_mntfromname;
 186         pe = pc+sizeof(mp->mnt_stat.f_mntfromname);
 187         bzero(pc, MNAMELEN);
 188         *(pc++) = '/';
 189         pc = index(strncpy(pc, conn->li.server, pe-pc-2),0);
 190         if (pc < pe-1) {
 191                 *(pc++) = ':';
 192                 pc=index(strncpy(pc, conn->li.user, pe-pc-2),0);
 193                 if (pc < pe-1) {
 194                         *(pc++) = '/';
 195                         strncpy(pc, nmp->m.mounted_vol, pe-pc-2);
 196                 }
 197         }
 198         /* protect against invalid mount points */
 199         nmp->m.mount_point[sizeof(nmp->m.mount_point)-1] = '\0';
 200
 201         vfs_add_vnodeops(mp, &nwfs_vnode_vops, &mp->mnt_vn_norm_ops);
 202
 203         vfs_getnewfsid(mp);
 204         error = nwfs_root(mp, &vp);
 205         if (error)
 206                 goto bad;
 207         /*
 208          * Lose the lock but keep the ref.
 209          */
 210         vn_unlock(vp);
 211         NCPVODEBUG("rootvp.vrefcnt=%d\n",vp->v_sysref.refcnt);
 212         return error;
 213 bad:
 214         if (nmp)
 215                 kfree(nmp, M_NWFSDATA);
 216         if (handle)
 217                 ncp_conn_puthandle(handle, NULL, 0);
 218         return error;
 219 }
 220
 221 /* Unmount the filesystem described by mp. */
 222 static int
 223 nwfs_unmount(struct mount *mp, int mntflags)
 224 {
 225         struct nwmount *nmp = VFSTONWFS(mp);
 226         struct ncp_conn *conn;
 227         int error, flags;
 228
 229         NCPVODEBUG("nwfs_unmount: flags=%04x\n",mntflags);
 230         flags = 0;
 231         if (mntflags & MNT_FORCE)
 232                 flags |= FORCECLOSE;
 233         /* There is 1 extra root vnode reference from nwfs_mount(). */
 234         error = vflush(mp, 1, flags);
 235         if (error)
 236                 return (error);
 237         conn = NWFSTOCONN(nmp);
 238         ncp_conn_puthandle(nmp->connh,NULL,0);
 239         if (ncp_conn_lock(conn, curthread, proc0.p_ucred, NCPM_WRITE | NCPM_EXECUTE) == 0) {
 240                 if(ncp_disconnect(conn))
 241                         ncp_conn_unlock(conn, curthread);
 242         }
 243         mp->mnt_data = (qaddr_t)0;
 244         if (nmp->m.flags & NWFS_MOUNT_HAVE_NLS)
 245                 kfree(nmp->m.nls.to_lower, M_NWFSDATA);
 246         kfree(nmp, M_NWFSDATA);
 247         mp->mnt_flag &= ~MNT_LOCAL;
 248         return (error);
 249 }
 250
 251 /*  Return locked vnode to root of a filesystem */
 252 static int
 253 nwfs_root(struct mount *mp, struct vnode **vpp)
 254 {
 255         struct vnode *vp;
 256         struct nwmount *nmp;
 257         struct nwnode *np;
 258         struct ncp_conn *conn;
 259         struct nw_entry_info fattr;
 260         struct thread *td = curthread;  /* XXX */
 261         struct ucred *cred;
 262         int error, nsf, opt;
 263         u_char vol;
 264
 265         KKASSERT(td->td_proc);
 266         cred = td->td_proc->p_ucred;
 267
 268         nmp = VFSTONWFS(mp);
 269         conn = NWFSTOCONN(nmp);
 270         if (nmp->n_root) {
 271                 *vpp = NWTOV(nmp->n_root);
 272                 while (vget(*vpp, LK_EXCLUSIVE) != 0) /* XXX */
 273                         ;
 274                 return 0;
 275         }
 276         error = ncp_lookup_volume(conn, nmp->m.mounted_vol, &vol,
 277                 &nmp->n_rootent.f_id, td, cred);
 278         if (error)
 279                 return ENOENT;
 280         nmp->n_volume = vol;
 281         error = ncp_get_namespaces(conn, vol, &nsf, td, cred);
 282         if (error)
 283                 return ENOENT;
 284         if (nsf & NW_NSB_OS2) {
 285                 NCPVODEBUG("volume %s has os2 namespace\n",nmp->m.mounted_vol);
 286                 if ((nmp->m.flags & NWFS_MOUNT_NO_OS2) == 0) {
 287                         nmp->name_space = NW_NS_OS2;
 288                         nmp->m.nls.opt &= ~NWHP_DOS;
 289                 }
 290         }
 291         opt = nmp->m.nls.opt;
 292         nsf = opt & (NWHP_UPPER | NWHP_LOWER);
 293         if (opt & NWHP_DOS) {
 294                 if (nsf == (NWHP_UPPER | NWHP_LOWER)) {
 295                         nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER);
 296                 } else if (nsf == 0) {
 297                         nmp->m.nls.opt |= NWHP_LOWER;
 298                 }
 299         } else {
 300                 if (nsf == (NWHP_UPPER | NWHP_LOWER)) {
 301                         nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER);
 302                 }
 303         }
 304         if (nmp->m.root_path[0]) {
 305                 nmp->m.root_path[0]--;
 306                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
 307                     -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred);
 308                 if (error) {
 309                         NCPFATAL("Invalid root path specified\n");
 310                         return ENOENT;
 311                 }
 312                 nmp->n_rootent.f_parent = fattr.dirEntNum;
 313                 nmp->m.root_path[0]++;
 314                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
 315                     -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred);
 316                 if (error) {
 317                         NCPFATAL("Invalid root path specified\n");
 318                         return ENOENT;
 319                 }
 320                 nmp->n_rootent.f_id = fattr.dirEntNum;
 321         } else {
 322                 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
 323                     0, NULL, &fattr, td, cred);
 324                 if (error) {
 325                         NCPFATAL("Can't obtain volume info\n");
 326                         return ENOENT;
 327                 }
 328                 fattr.nameLen = strlen(strcpy(fattr.entryName, NWFS_ROOTVOL));
 329                 nmp->n_rootent.f_parent = nmp->n_rootent.f_id;
 330         }
 331         error = nwfs_nget(mp, nmp->n_rootent, &fattr, NULL, &vp);
 332         if (error)
 333                 return (error);
 334         vp->v_flag |= VROOT;
 335         np = VTONW(vp);
 336         if (nmp->m.root_path[0] == 0)
 337                 np->n_flag |= NVOLUME;
 338         nmp->n_root = np;
 339 /*      error = VOP_GETATTR(vp, &vattr);
 340         if (error) {
 341                 vput(vp);
 342                 NCPFATAL("Can't get root directory entry\n");
 343                 return error;
 344         }*/
 345         *vpp = vp;
 346         return (0);
 347 }
 348
 349 /*ARGSUSED*/
 350 int
 351 nwfs_init(struct vfsconf *vfsp)
 352 {
 353 #ifndef SMP
 354         int name[2];
 355         int olen, ncpu, plen, error;
 356
 357         name[0] = CTL_HW;
 358         name[1] = HW_NCPU;
 359         error = kernel_sysctl(name, 2, &ncpu, &olen, NULL, 0, &plen);
 360         if (error == 0 && ncpu > 1)
 361                 kprintf("warning: nwfs module compiled without SMP support.");
 362 #endif
 363         nwfs_hash_init();
 364         nwfs_pbuf_freecnt = nswbuf / 2 + 1;
 365         NCPVODEBUG("always happy to load!\n");
 366         return (0);
 367 }
 368
 369 /*ARGSUSED*/
 370 int
 371 nwfs_uninit(struct vfsconf *vfsp)
 372 {
 373
 374         nwfs_hash_free();
 375         NCPVODEBUG("unloaded\n");
 376         return (0);
 377 }
 378
 379 /*
 380  * nwfs_statfs call
 381  */
 382 int
 383 nwfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
 384 {
 385         struct nwmount *nmp = VFSTONWFS(mp);
 386         int error = 0, secsize;
 387         struct nwnode *np = nmp->n_root;
 388         struct ncp_volume_info vi;
 389
 390         if (np == NULL) return EINVAL;
 391         error = ncp_get_volume_info_with_number(NWFSTOCONN(nmp), nmp->n_volume,
 392                                                 &vi, curthread, cred);
 393         if (error) return error;
 394         secsize = 512;                  /* XXX how to get real value ??? */
 395         sbp->f_spare2=0;                /* placeholder */
 396         /* fundamental file system block size */
 397         sbp->f_bsize = vi.sectors_per_block*secsize;
 398         /* optimal transfer block size */
 399         sbp->f_iosize = NWFSTOCONN(nmp)->buffer_size;
 400         /* total data blocks in file system */
 401         sbp->f_blocks= vi.total_blocks;
 402         /* free blocks in fs */
 403         sbp->f_bfree = vi.free_blocks + vi.purgeable_blocks;
 404         /* free blocks avail to non-superuser */
 405         sbp->f_bavail= vi.free_blocks+vi.purgeable_blocks;
 406         /* total file nodes in file system */
 407         sbp->f_files = vi.total_dir_entries;
 408         /* free file nodes in fs */
 409         sbp->f_ffree = vi.available_dir_entries;
 410         sbp->f_flags = 0;               /* copy of mount exported flags */
 411         if (sbp != &mp->mnt_stat) {
 412                 sbp->f_fsid = mp->mnt_stat.f_fsid;      /* file system id */
 413                 sbp->f_owner = mp->mnt_stat.f_owner;    /* user that mounted the filesystem */
 414                 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */
 415                 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
 416         }
 417         strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN);
 418         return 0;
 419 }
 420
 421 /*
 422  * Flush out the buffer cache
 423  */
 424 /* ARGSUSED */
 425 static int
 426 nwfs_sync(struct mount *mp, int waitfor)
 427 {
 428         struct vnode *vp;
 429         int error, allerror = 0;
 430         /*
 431          * Force stale buffer cache information to be flushed.
 432          */
 433 loop:
 434         for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist);
 435              vp != NULL;
 436              vp = TAILQ_NEXT(vp, v_nmntvnodes)) {
 437                 /*
 438                  * If the vnode that we are about to sync is no longer
 439                  * associated with this mount point, start over.
 440                  */
 441                 if (vp->v_mount != mp)
 442                         goto loop;
 443                 if (vn_islocked(vp) || RB_EMPTY(&vp->v_rbdirty_tree) ||
 444                     waitfor == MNT_LAZY)
 445                         continue;
 446                 if (vget(vp, LK_EXCLUSIVE))
 447                         goto loop;
 448                 /* XXX vp may not be retained */
 449                 error = VOP_FSYNC(vp, waitfor);
 450                 if (error)
 451                         allerror = error;
 452                 vput(vp);
 453         }
 454         return (allerror);
 455 }