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

Cache object: 4a82baab8c37f885a62b090db70154f4


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