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/smbfs/smbfs_vfsops.c

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    1 /*-
    2  * Copyright (c) 2000-2001, 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  * $FreeBSD$
   33  */
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/proc.h>
   38 #include <sys/bio.h>
   39 #include <sys/buf.h>
   40 #include <sys/kernel.h>
   41 #include <sys/sysctl.h>
   42 #include <sys/vnode.h>
   43 #include <sys/mount.h>
   44 #include <sys/stat.h>
   45 #include <sys/malloc.h>
   46 #include <sys/module.h>
   47 #include <sys/sx.h>
   48 
   49 
   50 #include <netsmb/smb.h>
   51 #include <netsmb/smb_conn.h>
   52 #include <netsmb/smb_subr.h>
   53 #include <netsmb/smb_dev.h>
   54 
   55 #include <fs/smbfs/smbfs.h>
   56 #include <fs/smbfs/smbfs_node.h>
   57 #include <fs/smbfs/smbfs_subr.h>
   58 
   59 static int smbfs_debuglevel = 0;
   60 
   61 static int smbfs_version = SMBFS_VERSION;
   62 
   63 #ifdef SMBFS_USEZONE
   64 #include <vm/vm.h>
   65 #include <vm/vm_extern.h>
   66 
   67 vm_zone_t smbfsmount_zone;
   68 #endif
   69 
   70 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem");
   71 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, "");
   72 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, "");
   73 
   74 static MALLOC_DEFINE(M_SMBFSHASH, "smbfs_hash", "SMBFS hash table");
   75 
   76 static vfs_init_t       smbfs_init;
   77 static vfs_uninit_t     smbfs_uninit;
   78 static vfs_cmount_t     smbfs_cmount;
   79 static vfs_mount_t      smbfs_mount;
   80 static vfs_root_t       smbfs_root;
   81 static vfs_quotactl_t   smbfs_quotactl;
   82 static vfs_statfs_t     smbfs_statfs;
   83 static vfs_unmount_t    smbfs_unmount;
   84 
   85 static struct vfsops smbfs_vfsops = {
   86         .vfs_init =             smbfs_init,
   87         .vfs_cmount =           smbfs_cmount,
   88         .vfs_mount =            smbfs_mount,
   89         .vfs_quotactl =         smbfs_quotactl,
   90         .vfs_root =             smbfs_root,
   91         .vfs_statfs =           smbfs_statfs,
   92         .vfs_sync =             vfs_stdsync,
   93         .vfs_uninit =           smbfs_uninit,
   94         .vfs_unmount =          smbfs_unmount,
   95 };
   96 
   97 
   98 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK);
   99 
  100 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION);
  101 MODULE_DEPEND(smbfs, libiconv, 1, 1, 2);
  102 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1);
  103 
  104 int smbfs_pbuf_freecnt = -1;    /* start out unlimited */
  105 
  106 static int
  107 smbfs_cmount(struct mntarg *ma, void * data, int flags)
  108 {
  109         struct smbfs_args args;
  110         int error;
  111 
  112         error = copyin(data, &args, sizeof(struct smbfs_args));
  113         if (error)
  114                 return error;
  115 
  116         if (args.version != SMBFS_VERSION) {
  117                 printf("mount version mismatch: kernel=%d, mount=%d\n",
  118                     SMBFS_VERSION, args.version);
  119                 return EINVAL;
  120         }
  121         ma = mount_argf(ma, "dev", "%d", args.dev);
  122         ma = mount_argb(ma, args.flags & SMBFS_MOUNT_SOFT, "nosoft");
  123         ma = mount_argb(ma, args.flags & SMBFS_MOUNT_INTR, "nointr");
  124         ma = mount_argb(ma, args.flags & SMBFS_MOUNT_STRONG, "nostrong");
  125         ma = mount_argb(ma, args.flags & SMBFS_MOUNT_HAVE_NLS, "nohave_nls");
  126         ma = mount_argb(ma, !(args.flags & SMBFS_MOUNT_NO_LONG), "nolong");
  127         ma = mount_arg(ma, "rootpath", args.root_path, -1);
  128         ma = mount_argf(ma, "uid", "%d", args.uid);
  129         ma = mount_argf(ma, "gid", "%d", args.gid);
  130         ma = mount_argf(ma, "file_mode", "%d", args.file_mode);
  131         ma = mount_argf(ma, "dir_mode", "%d", args.dir_mode);
  132         ma = mount_argf(ma, "caseopt", "%d", args.caseopt);
  133 
  134         error = kernel_mount(ma, flags);
  135 
  136         return (error);
  137 }
  138 
  139 static const char *smbfs_opts[] = {
  140         "dev", "soft", "intr", "strong", "have_nls", "long",
  141         "mountpoint", "rootpath", "uid", "gid", "file_mode", "dir_mode",
  142         "caseopt", "errmsg", NULL
  143 };
  144 
  145 static int
  146 smbfs_mount(struct mount *mp)
  147 {
  148         struct smbmount *smp = NULL;
  149         struct smb_vc *vcp;
  150         struct smb_share *ssp = NULL;
  151         struct vnode *vp;
  152         struct thread *td;
  153         struct smb_cred scred;
  154         int error, v;
  155         char *pc, *pe;
  156 
  157         td = curthread;
  158         if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS))
  159                 return EOPNOTSUPP;
  160 
  161         if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) {
  162                 vfs_mount_error(mp, "%s", "Invalid option");
  163                 return (EINVAL);
  164         }
  165 
  166         smb_makescred(&scred, td, td->td_ucred);
  167         if (1 != vfs_scanopt(mp->mnt_optnew, "dev", "%d", &v)) {
  168                 vfs_mount_error(mp, "No dev option");
  169                 return (EINVAL);
  170         }
  171         error = smb_dev2share(v, SMBM_EXEC, &scred, &ssp);
  172         if (error) {
  173                 printf("invalid device handle %d (%d)\n", v, error);
  174                 vfs_mount_error(mp, "invalid device handle %d (%d)\n", v, error);
  175                 return error;
  176         }
  177         vcp = SSTOVC(ssp);
  178         smb_share_unlock(ssp, 0);
  179         mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax;
  180 
  181 #ifdef SMBFS_USEZONE
  182         smp = zalloc(smbfsmount_zone);
  183 #else
  184         smp = malloc(sizeof(*smp), M_SMBFSDATA,
  185             M_WAITOK|M_USE_RESERVE);
  186 #endif
  187         if (smp == NULL) {
  188                 printf("could not alloc smbmount\n");
  189                 vfs_mount_error(mp, "could not alloc smbmount", v, error);
  190                 error = ENOMEM;
  191                 goto bad;
  192         }
  193         bzero(smp, sizeof(*smp));
  194         mp->mnt_data = smp;
  195         smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen);
  196         if (smp->sm_hash == NULL)
  197                 goto bad;
  198         sx_init(&smp->sm_hashlock, "smbfsh");
  199         smp->sm_share = ssp;
  200         smp->sm_root = NULL;
  201         if (1 != vfs_scanopt(mp->mnt_optnew,
  202             "caseopt", "%d", &smp->sm_caseopt)) {
  203                 vfs_mount_error(mp, "Invalid caseopt");
  204                 error = EINVAL;
  205                 goto bad;
  206         }
  207         if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) {
  208                 vfs_mount_error(mp, "Invalid uid");
  209                 error = EINVAL;
  210                 goto bad;
  211         }
  212         smp->sm_uid = v;
  213 
  214         if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) {
  215                 vfs_mount_error(mp, "Invalid gid");
  216                 error = EINVAL;
  217                 goto bad;
  218         }
  219         smp->sm_gid = v;
  220 
  221         if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) {
  222                 vfs_mount_error(mp, "Invalid file_mode");
  223                 error = EINVAL;
  224                 goto bad;
  225         }
  226         smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
  227 
  228         if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) {
  229                 vfs_mount_error(mp, "Invalid dir_mode");
  230                 error = EINVAL;
  231                 goto bad;
  232         }
  233         smp->sm_dir_mode  = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
  234 
  235         vfs_flagopt(mp->mnt_optnew,
  236             "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG);
  237 
  238 /*      simple_lock_init(&smp->sm_npslock);*/
  239         pc = mp->mnt_stat.f_mntfromname;
  240         pe = pc + sizeof(mp->mnt_stat.f_mntfromname);
  241         bzero(pc, MNAMELEN);
  242         *pc++ = '/';
  243         *pc++ = '/';
  244         pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0);
  245         if (pc < pe-1) {
  246                 *(pc++) = '@';
  247                 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0);
  248                 if (pc < pe - 1) {
  249                         *(pc++) = '/';
  250                         strncpy(pc, ssp->ss_name, pe - pc - 2);
  251                 }
  252         }
  253         vfs_getnewfsid(mp);
  254         error = smbfs_root(mp, LK_EXCLUSIVE, &vp);
  255         if (error) {
  256                 vfs_mount_error(mp, "smbfs_root error: %d", error);
  257                 goto bad;
  258         }
  259         VOP_UNLOCK(vp, 0);
  260         SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp));
  261 
  262 #ifdef DIAGNOSTICS
  263         SMBERROR("mp=%p\n", mp);
  264 #endif
  265         return error;
  266 bad:
  267         if (smp) {
  268                 if (smp->sm_hash)
  269                         free(smp->sm_hash, M_SMBFSHASH);
  270                 sx_destroy(&smp->sm_hashlock);
  271 #ifdef SMBFS_USEZONE
  272                 zfree(smbfsmount_zone, smp);
  273 #else
  274                 free(smp, M_SMBFSDATA);
  275 #endif
  276         }
  277         if (ssp)
  278                 smb_share_put(ssp, &scred);
  279         return error;
  280 }
  281 
  282 /* Unmount the filesystem described by mp. */
  283 static int
  284 smbfs_unmount(struct mount *mp, int mntflags)
  285 {
  286         struct thread *td;
  287         struct smbmount *smp = VFSTOSMBFS(mp);
  288         struct smb_cred scred;
  289         int error, flags;
  290 
  291         SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags);
  292         td = curthread;
  293         flags = 0;
  294         if (mntflags & MNT_FORCE)
  295                 flags |= FORCECLOSE;
  296         /*
  297          * Keep trying to flush the vnode list for the mount while 
  298          * some are still busy and we are making progress towards
  299          * making them not busy. This is needed because smbfs vnodes
  300          * reference their parent directory but may appear after their
  301          * parent in the list; one pass over the vnode list is not
  302          * sufficient in this case.
  303          */
  304         do {
  305                 smp->sm_didrele = 0;
  306                 /* There is 1 extra root vnode reference from smbfs_mount(). */
  307                 error = vflush(mp, 1, flags, td);
  308         } while (error == EBUSY && smp->sm_didrele != 0);
  309         if (error)
  310                 return error;
  311         smb_makescred(&scred, td, td->td_ucred);
  312         error = smb_share_lock(smp->sm_share, LK_EXCLUSIVE);
  313         if (error)
  314                 return error;
  315         smb_share_put(smp->sm_share, &scred);
  316         mp->mnt_data = NULL;
  317 
  318         if (smp->sm_hash)
  319                 free(smp->sm_hash, M_SMBFSHASH);
  320         sx_destroy(&smp->sm_hashlock);
  321 #ifdef SMBFS_USEZONE
  322         zfree(smbfsmount_zone, smp);
  323 #else
  324         free(smp, M_SMBFSDATA);
  325 #endif
  326         MNT_ILOCK(mp);
  327         mp->mnt_flag &= ~MNT_LOCAL;
  328         MNT_IUNLOCK(mp);
  329         return error;
  330 }
  331 
  332 /* 
  333  * Return locked root vnode of a filesystem
  334  */
  335 static int
  336 smbfs_root(struct mount *mp, int flags, struct vnode **vpp)
  337 {
  338         struct smbmount *smp = VFSTOSMBFS(mp);
  339         struct vnode *vp;
  340         struct smbnode *np;
  341         struct smbfattr fattr;
  342         struct thread *td;
  343         struct ucred *cred;
  344         struct smb_cred scred;
  345         int error;
  346 
  347         td = curthread;
  348         cred = td->td_ucred;
  349 
  350         if (smp == NULL) {
  351                 SMBERROR("smp == NULL (bug in umount)\n");
  352                 vfs_mount_error(mp, "smp == NULL (bug in umount)");
  353                 return EINVAL;
  354         }
  355         if (smp->sm_root) {
  356                 *vpp = SMBTOV(smp->sm_root);
  357                 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td);
  358         }
  359         smb_makescred(&scred, td, cred);
  360         error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred);
  361         if (error)
  362                 return error;
  363         error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp);
  364         if (error)
  365                 return error;
  366         ASSERT_VOP_LOCKED(vp, "smbfs_root");
  367         vp->v_vflag |= VV_ROOT;
  368         np = VTOSMB(vp);
  369         smp->sm_root = np;
  370         *vpp = vp;
  371         return 0;
  372 }
  373 
  374 /*
  375  * Do operations associated with quotas, not supported
  376  */
  377 /* ARGSUSED */
  378 static int
  379 smbfs_quotactl(mp, cmd, uid, arg)
  380         struct mount *mp;
  381         int cmd;
  382         uid_t uid;
  383         void *arg;
  384 {
  385         SMBVDEBUG("return EOPNOTSUPP\n");
  386         return EOPNOTSUPP;
  387 }
  388 
  389 /*ARGSUSED*/
  390 int
  391 smbfs_init(struct vfsconf *vfsp)
  392 {
  393 #ifdef SMBFS_USEZONE
  394         smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1);
  395 #endif
  396         smbfs_pbuf_freecnt = nswbuf / 2 + 1;
  397         SMBVDEBUG("done.\n");
  398         return 0;
  399 }
  400 
  401 /*ARGSUSED*/
  402 int
  403 smbfs_uninit(struct vfsconf *vfsp)
  404 {
  405 
  406         SMBVDEBUG("done.\n");
  407         return 0;
  408 }
  409 
  410 /*
  411  * smbfs_statfs call
  412  */
  413 int
  414 smbfs_statfs(struct mount *mp, struct statfs *sbp)
  415 {
  416         struct thread *td = curthread;
  417         struct smbmount *smp = VFSTOSMBFS(mp);
  418         struct smbnode *np = smp->sm_root;
  419         struct smb_share *ssp = smp->sm_share;
  420         struct smb_cred scred;
  421         int error = 0;
  422 
  423         if (np == NULL) {
  424                 vfs_mount_error(mp, "np == NULL");
  425                 return EINVAL;
  426         }
  427         
  428         sbp->f_iosize = SSTOVC(ssp)->vc_txmax;          /* optimal transfer block size */
  429         smb_makescred(&scred, td, td->td_ucred);
  430 
  431         if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0)
  432                 error = smbfs_smb_statfs2(ssp, sbp, &scred);
  433         else
  434                 error = smbfs_smb_statfs(ssp, sbp, &scred);
  435         if (error)
  436                 return error;
  437         sbp->f_flags = 0;               /* copy of mount exported flags */
  438         return 0;
  439 }

Cache object: 7c8df711c9c36b67e79678f1cafe019c


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