Esempio n. 1
0
int
fuse_vncache_lookup(vnode_t dvp, vnode_t *vpp, struct componentname *cnp)
{
#if M_OSXFUSE_ENABLE_BIG_LOCK
    /*
     * Make sure that biglock is actually held by the thread calling us before
     * trying to unlock it. fuse_vncache_lookup is called by notification
     * handlers that do not hold biglock. Trying to unlock it in this case would
     * result in a kernel panic.
     */

    struct fuse_data *data = fuse_get_mpdata(vnode_mount(dvp));
    bool biglock_locked = fuse_biglock_have_lock(data->biglock);

    if (biglock_locked) {
        fuse_biglock_unlock(data->biglock);
    }
#endif /* M_OSXFUSE_ENABLE_BIG_LOCK */
    int ret = cache_lookup(dvp, vpp, cnp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
    if (biglock_locked) {
        fuse_biglock_lock(data->biglock);
    }
#endif

#if FUSE_TRACE_VNCACHE
    IOLog("osxfuse: cache lookup ret=%d, dvp=%p, *vpp=%p, %s\n",
          ret, dvp, *vpp, cnp->cn_nameptr);
#endif
    return ret;
}
Esempio n. 2
0
static int
fuse_sync_callback(vnode_t vp, void *cargs)
{
    int type;
    struct fuse_sync_cargs *args;
    struct fuse_vnode_data *fvdat;
    struct fuse_filehandle *fufh;
    struct fuse_data       *data;
    mount_t mp;

    if (!vnode_hasdirtyblks(vp)) {
        return VNODE_RETURNED;
    }

    mp = vnode_mount(vp);

    if (fuse_isdeadfs_mp(mp)) {
        return VNODE_RETURNED_DONE;
    }

    data = fuse_get_mpdata(mp);

    if (!fuse_implemented(data, (vnode_isdir(vp)) ?
        FSESS_NOIMPLBIT(FSYNCDIR) : FSESS_NOIMPLBIT(FSYNC))) {
        return VNODE_RETURNED;
    }

    args = (struct fuse_sync_cargs *)cargs;
    fvdat = VTOFUD(vp);

#if M_OSXFUSE_ENABLE_BIG_LOCK
    fuse_biglock_unlock(data->biglock);
#endif
    cluster_push(vp, 0);
#if M_OSXFUSE_ENABLE_BIG_LOCK
    fuse_biglock_lock(data->biglock);
#endif

    for (type = 0; type < FUFH_MAXTYPE; type++) {
        fufh = &(fvdat->fufh[type]);
        if (FUFH_IS_VALID(fufh)) {
            (void)fuse_internal_fsync_fh(vp, args->context, fufh,
                                         FUSE_OP_FOREGROUNDED);
        }
    }

    /*
     * In general:
     *
     * - can use vnode_isinuse() if the need be
     * - vnode and UBC are in lock-step
     * - note that umount will call ubc_sync_range()
     */

    return VNODE_RETURNED;
}
Esempio n. 3
0
static errno_t
fuse_vfsop_sync(mount_t mp, int waitfor, vfs_context_t context)
{
    uint64_t mntflags;
    struct fuse_sync_cargs args;
    int allerror = 0;

    fuse_trace_printf_vfsop();

    mntflags = vfs_flags(mp);

    if (fuse_isdeadfs_mp(mp)) {
        return 0;
    }

    if (vfs_isupdate(mp)) {
        return 0;
    }

    if (vfs_isrdonly(mp)) {
        return EROFS; // should panic!?
    }

    /*
     * Write back each (modified) fuse node.
     */
    args.context = context;
    args.waitfor = waitfor;
    args.error = 0;

#if M_FUSE4X_ENABLE_BIGLOCK
    struct fuse_data *data = fuse_get_mpdata(mp);
    fuse_biglock_unlock(data->biglock);
#endif
    vnode_iterate(mp, 0, fuse_sync_callback, (void *)&args);
#if M_FUSE4X_ENABLE_BIGLOCK
    fuse_biglock_lock(data->biglock);
#endif

    if (args.error) {
        allerror = args.error;
    }

    /*
     * For other types of stale file system information, such as:
     *
     * - fs control info
     * - quota information
     * - modified superblock
     */

    return allerror;
}
Esempio n. 4
0
__inline__
int
fuse_vncache_lookup(vnode_t dvp, vnode_t *vpp, struct componentname *cnp)
{
#if M_OSXFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_OSXFUSE_ENABLE_HUGE_LOCK
    struct fuse_data *data = fuse_get_mpdata(vnode_mount(dvp));
    fuse_biglock_unlock(data->biglock);
#endif
    int ret = cache_lookup(dvp, vpp, cnp);
#if M_OSXFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_OSXFUSE_ENABLE_HUGE_LOCK
    fuse_biglock_lock(data->biglock);
#endif

#if FUSE_TRACE_VNCACHE
    IOLog("OSXFUSE: cache lookup ret=%d, dvp=%p, *vpp=%p, %s\n",
          ret, dvp, *vpp, cnp->cn_nameptr);
#endif
    return ret;
}
Esempio n. 5
0
void
fuse_vncache_purge(vnode_t vp)
{
#if FUSE_TRACE_VNCACHE
    IOLog("osxfuse: cache purge vp=%p\n", vp);
#endif

#if M_OSXFUSE_ENABLE_BIG_LOCK
    struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
    bool biglock_locked = fuse_biglock_have_lock(data->biglock);

    if (biglock_locked) {
        fuse_biglock_unlock(data->biglock);
    }
#endif /* M_OSXFUSE_ENABLE_BIG_LOCK */
    cache_purge(vp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
    if (biglock_locked) {
        fuse_biglock_lock(data->biglock);
    }
#endif
}
Esempio n. 6
0
void
fuse_vncache_enter(vnode_t dvp, vnode_t vp, struct componentname *cnp)
{
#if FUSE_TRACE_VNCACHE
    IOLog("osxfuse: cache enter dvp=%p, vp=%p, %s\n", dvp, vp, cnp->cn_nameptr);
#endif

#if M_OSXFUSE_ENABLE_BIG_LOCK
    struct fuse_data *data = fuse_get_mpdata(vnode_mount(dvp));
    bool biglock_locked = fuse_biglock_have_lock(data->biglock);

    if (biglock_locked) {
        fuse_biglock_unlock(data->biglock);
    }
#endif /* M_OSXFUSE_ENABLE_BIG_LOCK */
    cache_enter(dvp, vp, cnp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
    if (biglock_locked) {
        fuse_biglock_lock(data->biglock);
    }
#endif
}
Esempio n. 7
0
static errno_t
fuse_vfsop_unmount(mount_t mp, int mntflags, vfs_context_t context)
{
    int   err        = 0;
    int   flags      = 0;

    fuse_device_t          fdev;
    struct fuse_data      *data;
    struct fuse_dispatcher fdi;

    vnode_t fuse_rootvp = NULLVP;

    fuse_trace_printf_vfsop();

    if (mntflags & MNT_FORCE) {
        flags |= FORCECLOSE;
    }

    data = fuse_get_mpdata(mp);
    if (!data) {
        panic("fuse4x: no mount private data in vfs_unmount");
    }

#if M_FUSE4X_ENABLE_BIGLOCK
    fuse_biglock_lock(data->biglock);
#endif

    fdev = data->fdev;

    if (fdata_dead_get(data)) {

        /*
         * If the file system daemon is dead, it's pointless to try to do
         * any unmount-time operations that go out to user space. Therefore,
         * we pretend that this is a force unmount. However, this isn't of much
         * use. That's because if any non-root vnode is in use, the vflush()
         * that the kernel does before calling our VFS_UNMOUNT will fail
         * if the original unmount wasn't forcible already. That earlier
         * vflush is called with SKIPROOT though, so it wouldn't bail out
         * on the root vnode being in use.
         *
         * If we want, we could set FORCECLOSE here so that a non-forced
         * unmount will be "upgraded" to a forced unmount if the root vnode
         * is busy (you are cd'd to the mount point, for example). It's not
         * quite pure to do that though.
         *
         *    flags |= FORCECLOSE;
         *    log("fuse4x: forcing unmount on a dead file system\n");
         */

    } else if (!(data->dataflags & FSESS_INITED)) {
        flags |= FORCECLOSE;
        log("fuse4x: forcing unmount on not-yet-alive file system\n");
        fdata_set_dead(data);
    }

    fuse_rootvp = data->rootvp;

    fuse_trace_printf("%s: Calling vflush(mp, fuse_rootvp, flags=0x%X);\n", __FUNCTION__, flags);
#if M_FUSE4X_ENABLE_BIGLOCK
    fuse_biglock_unlock(data->biglock);
#endif
    err = vflush(mp, fuse_rootvp, flags);
#if M_FUSE4X_ENABLE_BIGLOCK
    fuse_biglock_lock(data->biglock);
#endif
    fuse_trace_printf("%s:   Done.\n", __FUNCTION__);
    if (err) {
#if M_FUSE4X_ENABLE_BIGLOCK
        fuse_biglock_unlock(data->biglock);
#endif
        return err;
    }

    if (vnode_isinuse(fuse_rootvp, 1) && !(flags & FORCECLOSE)) {
#if M_FUSE4X_ENABLE_BIGLOCK
        fuse_biglock_unlock(data->biglock);
#endif
        return EBUSY;
    }

    if (fdata_dead_get(data)) {
        goto alreadydead;
    }

    fdisp_init(&fdi, 0 /* no data to send along */);
    fdisp_make(&fdi, FUSE_DESTROY, mp, FUSE_ROOT_ID, context);

    fuse_trace_printf("%s: Waiting for reply from FUSE_DESTROY.\n", __FUNCTION__);
    err = fdisp_wait_answ(&fdi);
    fuse_trace_printf("%s:   Reply received.\n", __FUNCTION__);
    if (!err) {
        fuse_ticket_drop(fdi.tick);
    }

    /*
     * Note that dounmount() signals a VQ_UNMOUNT VFS event.
     */

    fdata_set_dead(data);

alreadydead:

    fuse_trace_printf("%s: Calling vnode_rele(fuse_rootp);\n", __FUNCTION__);
#if M_FUSE4X_ENABLE_BIGLOCK
    fuse_biglock_unlock(data->biglock);
#endif
    vnode_rele(fuse_rootvp); /* We got this reference in fuse_vfsop_mount(). */
#if M_FUSE4X_ENABLE_BIGLOCK
    fuse_biglock_lock(data->biglock);
#endif
    fuse_trace_printf("%s:   Done.\n", __FUNCTION__);

    data->rootvp = NULLVP;

    fuse_trace_printf("%s: Calling vflush(mp, NULLVP, FORCECLOSE);\n", __FUNCTION__);
#if M_FUSE4X_ENABLE_BIGLOCK
    fuse_biglock_unlock(data->biglock);
#endif
    (void)vflush(mp, NULLVP, FORCECLOSE);
#if M_FUSE4X_ENABLE_BIGLOCK
    fuse_biglock_lock(data->biglock);
#endif
    fuse_trace_printf("%s:   Done.\n", __FUNCTION__);

    fuse_lck_mtx_lock(fdev->mtx);

    vfs_setfsprivate(mp, NULL);
    data->dataflags &= ~FSESS_MOUNTED;
    OSAddAtomic(-1, (SInt32 *)&fuse_mount_count);

#if M_FUSE4X_ENABLE_BIGLOCK
    fuse_biglock_unlock(data->biglock);
#endif

    if (!(data->dataflags & FSESS_OPENED)) {

        /* fdev->data was left for us to clean up */

        fuse_device_close_final(fdev);

        /* fdev->data is gone now */
    }

    fuse_lck_mtx_unlock(fdev->mtx);

    return 0;
}
Esempio n. 8
0
static errno_t
fuse_vfsop_mount(mount_t mp, __unused vnode_t devvp, user_addr_t udata,
                 vfs_context_t context)
{
    int err      = 0;
    int mntopts  = 0;
    bool mounted = false;

    uint32_t max_read = ~0;

    size_t len;

    fuse_device_t      fdev = NULL;
    struct fuse_data  *data = NULL;
    fuse_mount_args    fusefs_args;
    struct vfsstatfs  *vfsstatfsp = vfs_statfs(mp);

#if M_FUSE4X_ENABLE_BIGLOCK
    lck_mtx_t         *biglock;
#endif

    fuse_trace_printf_vfsop();

    if (vfs_isupdate(mp)) {
        return ENOTSUP;
    }

    err = copyin(udata, &fusefs_args, sizeof(fusefs_args));
    if (err) {
        return EINVAL;
    }

    /*
     * Interesting flags that we can receive from mount or may want to
     * otherwise forcibly set include:
     *
     *     MNT_ASYNC
     *     MNT_AUTOMOUNTED
     *     MNT_DEFWRITE
     *     MNT_DONTBROWSE
     *     MNT_IGNORE_OWNERSHIP
     *     MNT_JOURNALED
     *     MNT_NODEV
     *     MNT_NOEXEC
     *     MNT_NOSUID
     *     MNT_NOUSERXATTR
     *     MNT_RDONLY
     *     MNT_SYNCHRONOUS
     *     MNT_UNION
     */

    err = ENOTSUP;

#if M_FUSE4X_ENABLE_UNSUPPORTED
    vfs_setlocklocal(mp);
#endif /* M_FUSE4X_ENABLE_UNSUPPORTED */

    /** Option Processing. **/

    if (*fusefs_args.fstypename) {
        size_t typenamelen = strlen(fusefs_args.fstypename);
        if (typenamelen > FUSE_FSTYPENAME_MAXLEN) {
            return EINVAL;
        }
        snprintf(vfsstatfsp->f_fstypename, MFSTYPENAMELEN, "%s%s",
                 FUSE_FSTYPENAME_PREFIX, fusefs_args.fstypename);
    }

    if (!*fusefs_args.fsname)
        return EINVAL;

    if ((fusefs_args.daemon_timeout > FUSE_MAX_DAEMON_TIMEOUT) ||
            (fusefs_args.daemon_timeout < FUSE_MIN_DAEMON_TIMEOUT)) {
        return EINVAL;
    }

    if ((fusefs_args.init_timeout > FUSE_MAX_INIT_TIMEOUT) ||
            (fusefs_args.init_timeout < FUSE_MIN_INIT_TIMEOUT)) {
        return EINVAL;
    }

    if (fusefs_args.altflags & FUSE_MOPT_SPARSE) {
        mntopts |= FSESS_SPARSE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_AUTO_CACHE) {
        mntopts |= FSESS_AUTO_CACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_AUTO_XATTR) {
        if (fusefs_args.altflags & FUSE_MOPT_NATIVE_XATTR) {
            return EINVAL;
        }
        mntopts |= FSESS_AUTO_XATTR;
    } else if (fusefs_args.altflags & FUSE_MOPT_NATIVE_XATTR) {
        mntopts |= FSESS_NATIVE_XATTR;
    }

    if (fusefs_args.altflags & FUSE_MOPT_JAIL_SYMLINKS) {
        mntopts |= FSESS_JAIL_SYMLINKS;
    }

    /*
     * Note that unlike Linux, which keeps allow_root in user-space and
     * passes allow_other in that case to the kernel, we let allow_root
     * reach the kernel. The 'if' ordering is important here.
     */
    if (fusefs_args.altflags & FUSE_MOPT_ALLOW_ROOT) {
        int is_member = 0;
        if ((kauth_cred_ismember_gid(kauth_cred_get(), fuse_admin_group, &is_member) != 0) || !is_member) {
            log("fuse4x: caller is not a member of fuse4x admin group. "
                "Either add user (id=%d) to group (id=%d), "
                "or set correct '" SYSCTL_FUSE4X_TUNABLES_ADMIN "' sysctl value.\n",
                kauth_cred_getuid(kauth_cred_get()), fuse_admin_group);
            return EPERM;
        }
        mntopts |= FSESS_ALLOW_ROOT;
    } else if (fusefs_args.altflags & FUSE_MOPT_ALLOW_OTHER) {
        if (!fuse_allow_other && !fuse_vfs_context_issuser(context)) {
            int is_member = 0;
            if ((kauth_cred_ismember_gid(kauth_cred_get(), fuse_admin_group, &is_member) != 0) || !is_member) {
                log("fuse4x: caller is not a member of fuse4x admin group. "
                    "Either add user (id=%d) to group (id=%d), "
                    "or set correct '" SYSCTL_FUSE4X_TUNABLES_ADMIN "' sysctl value.\n",
                    kauth_cred_getuid(kauth_cred_get()), fuse_admin_group);
                return EPERM;
            }
        }
        mntopts |= FSESS_ALLOW_OTHER;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_APPLEDOUBLE) {
        mntopts |= FSESS_NO_APPLEDOUBLE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_APPLEXATTR) {
        mntopts |= FSESS_NO_APPLEXATTR;
    }

    if ((fusefs_args.altflags & FUSE_MOPT_FSID) && (fusefs_args.fsid != 0)) {
        fsid_t   fsid;
        mount_t  other_mp;
        uint32_t target_dev;

        target_dev = FUSE_MAKEDEV(FUSE_CUSTOM_FSID_DEVICE_MAJOR,
                                  fusefs_args.fsid);

        fsid.val[0] = target_dev;
        fsid.val[1] = FUSE_CUSTOM_FSID_VAL1;

        other_mp = vfs_getvfs(&fsid);
        if (other_mp != NULL) {
            return EPERM;
        }

        vfsstatfsp->f_fsid.val[0] = target_dev;
        vfsstatfsp->f_fsid.val[1] = FUSE_CUSTOM_FSID_VAL1;

    } else {
        vfs_getnewfsid(mp);
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_ATTRCACHE) {
        mntopts |= FSESS_NO_ATTRCACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_READAHEAD) {
        mntopts |= FSESS_NO_READAHEAD;
    }

    if (fusefs_args.altflags & (FUSE_MOPT_NO_UBC | FUSE_MOPT_DIRECT_IO)) {
        mntopts |= FSESS_NO_UBC;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_VNCACHE) {
        mntopts |= FSESS_NO_VNCACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NEGATIVE_VNCACHE) {
        if (mntopts & FSESS_NO_VNCACHE) {
            return EINVAL;
        }
        mntopts |= FSESS_NEGATIVE_VNCACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_SYNCWRITES) {

        /* Cannot mix 'nosyncwrites' with 'noubc' or 'noreadahead'. */
        if (mntopts & (FSESS_NO_READAHEAD | FSESS_NO_UBC)) {
            log("fuse4x: cannot mix 'nosyncwrites' with 'noubc' or 'noreadahead'\n");
            return EINVAL;
        }

        mntopts |= FSESS_NO_SYNCWRITES;
        vfs_clearflags(mp, MNT_SYNCHRONOUS);
        vfs_setflags(mp, MNT_ASYNC);

        /* We check for this only if we have nosyncwrites in the first place. */
        if (fusefs_args.altflags & FUSE_MOPT_NO_SYNCONCLOSE) {
            mntopts |= FSESS_NO_SYNCONCLOSE;
        }

    } else {
        vfs_clearflags(mp, MNT_ASYNC);
        vfs_setflags(mp, MNT_SYNCHRONOUS);
    }

    if (mntopts & FSESS_NO_UBC) {
        /* If no buffer cache, disallow exec from file system. */
        vfs_setflags(mp, MNT_NOEXEC);
    }

    vfs_setauthopaque(mp);
    vfs_setauthopaqueaccess(mp);

    if ((fusefs_args.altflags & FUSE_MOPT_DEFAULT_PERMISSIONS) &&
            (fusefs_args.altflags & FUSE_MOPT_DEFER_PERMISSIONS)) {
        return EINVAL;
    }

    if (fusefs_args.altflags & FUSE_MOPT_DEFAULT_PERMISSIONS) {
        mntopts |= FSESS_DEFAULT_PERMISSIONS;
        vfs_clearauthopaque(mp);
    }

    if (fusefs_args.altflags & FUSE_MOPT_DEFER_PERMISSIONS) {
        mntopts |= FSESS_DEFER_PERMISSIONS;
    }

    if (fusefs_args.altflags & FUSE_MOPT_EXTENDED_SECURITY) {
        mntopts |= FSESS_EXTENDED_SECURITY;
        vfs_setextendedsecurity(mp);
    }

    if (fusefs_args.altflags & FUSE_MOPT_LOCALVOL) {
        vfs_setflags(mp, MNT_LOCAL);
    }
    /* done checking incoming option bits */

    err = 0;

    vfs_setfsprivate(mp, NULL);

    fdev = fuse_device_get(fusefs_args.rdev);
    if (!fdev) {
        log("fuse4x: invalid device file (number=%d)\n", fusefs_args.rdev);
        return EINVAL;
    }

    fuse_lck_mtx_lock(fdev->mtx);

    data = fdev->data;

    if (!data) {
        fuse_lck_mtx_unlock(fdev->mtx);
        return ENXIO;
    }

#if M_FUSE4X_ENABLE_BIGLOCK
    biglock = data->biglock;
    fuse_biglock_lock(biglock);
#endif

    if (data->dataflags & FSESS_MOUNTED) {
#if M_FUSE4X_ENABLE_BIGLOCK
        fuse_biglock_unlock(biglock);
#endif
        fuse_lck_mtx_unlock(fdev->mtx);
        return EALREADY;
    }

    if (!(data->dataflags & FSESS_OPENED)) {
        fuse_lck_mtx_unlock(fdev->mtx);
        err = ENXIO;
        goto out;
    }

    data->dataflags |= FSESS_MOUNTED;
    OSAddAtomic(1, (SInt32 *)&fuse_mount_count);
    mounted = true;

    if (fdata_dead_get(data)) {
        fuse_lck_mtx_unlock(fdev->mtx);
        err = ENOTCONN;
        goto out;
    }

    if (!data->daemoncred) {
        panic("fuse4x: daemon found but identity unknown");
    }

    if (fuse_vfs_context_issuser(context) &&
            kauth_cred_getuid(vfs_context_ucred(context)) != kauth_cred_getuid(data->daemoncred)) {
        fuse_lck_mtx_unlock(fdev->mtx);
        err = EPERM;
        log("fuse4x: fuse daemon running by user_id=%d does not have privileges to mount on directory %s owned by user_id=%d\n",
            kauth_cred_getuid(data->daemoncred), vfsstatfsp->f_mntonname, kauth_cred_getuid(vfs_context_ucred(context)));
        goto out;
    }

    data->mp = mp;
    data->fdev = fdev;
    data->dataflags |= mntopts;

    data->daemon_timeout.tv_sec =  fusefs_args.daemon_timeout;
    data->daemon_timeout.tv_nsec = 0;
    if (data->daemon_timeout.tv_sec) {
        data->daemon_timeout_p = &(data->daemon_timeout);
    } else {
        data->daemon_timeout_p = NULL;
    }

    data->init_timeout.tv_sec = fusefs_args.init_timeout;
    data->init_timeout.tv_nsec = 0;

    data->max_read = max_read;
    data->fssubtype = fusefs_args.fssubtype;
    data->mountaltflags = fusefs_args.altflags;
    data->noimplflags = (uint64_t)0;

    data->blocksize = fuse_round_size(fusefs_args.blocksize,
                                      FUSE_MIN_BLOCKSIZE, FUSE_MAX_BLOCKSIZE);

    data->iosize = fuse_round_size(fusefs_args.iosize,
                                   FUSE_MIN_IOSIZE, FUSE_MAX_IOSIZE);

    if (data->iosize < data->blocksize) {
        data->iosize = data->blocksize;
    }

    data->userkernel_bufsize = FUSE_DEFAULT_USERKERNEL_BUFSIZE;

    copystr(fusefs_args.fsname, vfsstatfsp->f_mntfromname,
            MNAMELEN - 1, &len);
    bzero(vfsstatfsp->f_mntfromname + len, MNAMELEN - len);

    copystr(fusefs_args.volname, data->volname, MAXPATHLEN - 1, &len);
    bzero(data->volname + len, MAXPATHLEN - len);

    /* previous location of vfs_setioattr() */

    vfs_setfsprivate(mp, data);

    fuse_lck_mtx_unlock(fdev->mtx);

    /* Send a handshake message to the daemon. */
    fuse_send_init(data, context);

    struct vfs_attr vfs_attr;
    VFSATTR_INIT(&vfs_attr);
    // Our vfs_getattr() doesn't look at most *_IS_ACTIVE()'s
    err = fuse_vfsop_getattr(mp, &vfs_attr, context);
    if (!err) {
        vfsstatfsp->f_bsize  = vfs_attr.f_bsize;
        vfsstatfsp->f_iosize = vfs_attr.f_iosize;
        vfsstatfsp->f_blocks = vfs_attr.f_blocks;
        vfsstatfsp->f_bfree  = vfs_attr.f_bfree;
        vfsstatfsp->f_bavail = vfs_attr.f_bavail;
        vfsstatfsp->f_bused  = vfs_attr.f_bused;
        vfsstatfsp->f_files  = vfs_attr.f_files;
        vfsstatfsp->f_ffree  = vfs_attr.f_ffree;
        // vfsstatfsp->f_fsid already handled above
        vfsstatfsp->f_owner  = kauth_cred_getuid(data->daemoncred);
        vfsstatfsp->f_flags  = vfs_flags(mp);
        // vfsstatfsp->f_fstypename already handled above
        // vfsstatfsp->f_mntonname handled elsewhere
        // vfsstatfsp->f_mnfromname already handled above
        vfsstatfsp->f_fssubtype = data->fssubtype;
    }
    if (fusefs_args.altflags & FUSE_MOPT_BLOCKSIZE) {
        vfsstatfsp->f_bsize = data->blocksize;
    } else {
        //data->blocksize = vfsstatfsp->f_bsize;
    }
    if (fusefs_args.altflags & FUSE_MOPT_IOSIZE) {
        vfsstatfsp->f_iosize = data->iosize;
    } else {
        //data->iosize = (uint32_t)vfsstatfsp->f_iosize;
        vfsstatfsp->f_iosize = data->iosize;
    }

out:
    if (err) {
        vfs_setfsprivate(mp, NULL);

        fuse_lck_mtx_lock(fdev->mtx);
        data = fdev->data; /* again */
        if (mounted) {
            OSAddAtomic(-1, (SInt32 *)&fuse_mount_count);
        }
        if (data) {
            data->dataflags &= ~FSESS_MOUNTED;
            if (!(data->dataflags & FSESS_OPENED)) {
#if M_FUSE4X_ENABLE_BIGLOCK
                assert(biglock == data->biglock);
                fuse_biglock_unlock(biglock);
#endif
                fuse_device_close_final(fdev);
                /* data is gone now */
            }
        }
        fuse_lck_mtx_unlock(fdev->mtx);
    } else {
        vnode_t fuse_rootvp = NULLVP;
        err = fuse_vfsop_root(mp, &fuse_rootvp, context);
        if (err) {
            goto out; /* go back and follow error path */
        }
        err = vnode_ref(fuse_rootvp);
        (void)vnode_put(fuse_rootvp);
        if (err) {
            goto out; /* go back and follow error path */
        } else {
            struct vfsioattr ioattr;

            vfs_ioattr(mp, &ioattr);
            ioattr.io_devblocksize = data->blocksize;
            vfs_setioattr(mp, &ioattr);
        }
    }

#if M_FUSE4X_ENABLE_BIGLOCK
    fuse_lck_mtx_lock(fdev->mtx);
    data = fdev->data; /* ...and again */
    if(data) {
        assert(data->biglock == biglock);
        fuse_biglock_unlock(biglock);
    }
    fuse_lck_mtx_unlock(fdev->mtx);
#endif

    return err;
}
Esempio n. 9
0
errno_t
FSNodeGetOrCreateFileVNodeByID(vnode_t              *vnPtr,
                               uint32_t              flags,
                               struct fuse_abi_data *feo,
                               mount_t               mp,
                               vnode_t               dvp,
                               vfs_context_t         context,
                               uint32_t             *oflags)
{
    int   err;

    vnode_t  vn    = NULLVP;
    HNodeRef hn    = NULL;

    struct fuse_vnode_data *fvdat   = NULL;
    struct fuse_data       *mntdata = NULL;
    fuse_device_t           dummy_device;

    struct fuse_abi_data fa;

    enum vtype vtyp;

    fuse_abi_data_init(&fa, feo->fad_version, fuse_entry_out_get_attr(feo));

    vtyp = IFTOVT(fuse_attr_get_mode(&fa));

    if ((vtyp >= VBAD) || (vtyp == VNON)) {
        return EINVAL;
    }

    int      markroot   = (flags & FN_IS_ROOT) ? 1 : 0;
    uint64_t size       = (flags & FN_IS_ROOT) ? 0 : fuse_attr_get_size(&fa);
    uint32_t rdev       = (flags & FN_IS_ROOT) ? 0 : fuse_attr_get_rdev(&fa);
    uint64_t generation = fuse_entry_out_get_generation(feo);

    mntdata = fuse_get_mpdata(mp);
    dummy_device = mntdata->fdev;

    err = HNodeLookupCreatingIfNecessary(dummy_device, fuse_entry_out_get_nodeid(feo),
                                         0 /* fork index */, &hn, &vn);
    if ((err == 0) && (vn == NULL)) {

        struct vnode_fsparam params;

        fvdat = (struct fuse_vnode_data *)FSNodeGenericFromHNode(hn);

        if (!fvdat->fInitialised) {

            fvdat->fInitialised = true;

            /* self */
            fvdat->vp           = NULLVP; /* hold on */
            fvdat->nodeid       = fuse_entry_out_get_nodeid(feo);
            fvdat->generation   = generation;

            /* parent */
            fvdat->parentvp     = dvp;
            if (dvp) {
                fvdat->parent_nodeid = VTOI(dvp);
            } else {
                fvdat->parent_nodeid = 0;
            }

            /* I/O */
            {
                int k;
                for (k = 0; k < FUFH_MAXTYPE; k++) {
                    FUFH_USE_RESET(&(fvdat->fufh[k]));
                }
            }

            /* flags */
            fvdat->flag         = flags;
            fvdat->c_flag       = 0;

            /* meta */

            /* XXX: truncation */
            fvdat->entry_valid.tv_sec  = (time_t)fuse_entry_out_get_entry_valid(feo);

            fvdat->entry_valid.tv_nsec = fuse_entry_out_get_entry_valid_nsec(feo);

            /* XXX: truncation */
            fvdat->attr_valid.tv_sec   = 0;

            fvdat->attr_valid.tv_nsec  = 0;

            /* XXX: truncation */
            fvdat->modify_time.tv_sec  = (time_t)fuse_attr_get_mtime(&fa);

            fvdat->modify_time.tv_nsec = fuse_attr_get_mtimensec(&fa);

            fvdat->filesize            = size;
            fvdat->nlookup             = 0;
            fvdat->vtype               = vtyp;

            /* locking */
            fvdat->createlock = lck_mtx_alloc_init(fuse_lock_group,
                                                   fuse_lock_attr);
            fvdat->creator = current_thread();
#if M_OSXFUSE_ENABLE_TSLOCKING
            fvdat->nodelock = lck_rw_alloc_init(fuse_lock_group,
                                                fuse_lock_attr);
            fvdat->nodelockowner = NULL;
            fvdat->truncatelock  = lck_rw_alloc_init(fuse_lock_group,
                                                     fuse_lock_attr);
#endif
        }

        if (err == 0) {
            params.vnfs_mp     = mp;
            params.vnfs_vtype  = vtyp;
            params.vnfs_str    = NULL;
            params.vnfs_dvp    = dvp; /* NULLVP for the root vnode */
            params.vnfs_fsnode = hn;

#if M_OSXFUSE_ENABLE_SPECFS
            if ((vtyp == VBLK) || (vtyp == VCHR)) {
                params.vnfs_vops = fuse_spec_operations;
                params.vnfs_rdev = (dev_t)rdev;
#else
            if (0) {
#endif
#if M_OSXFUSE_ENABLE_FIFOFS
            } else if (vtyp == VFIFO) {
                params.vnfs_vops = fuse_fifo_operations;
                params.vnfs_rdev = 0;
                (void)rdev;
#else
            } else if (0) {
#endif
            } else {
                params.vnfs_vops = fuse_vnode_operations;
                params.vnfs_rdev = 0;
                (void)rdev;
            }

            params.vnfs_marksystem = 0;
            params.vnfs_cnp        = NULL;
            params.vnfs_flags      = VNFS_NOCACHE | VNFS_CANTCACHE;
            params.vnfs_filesize   = size;
            params.vnfs_markroot   = markroot;

#if M_OSXFUSE_ENABLE_BIG_LOCK
            fuse_biglock_unlock(mntdata->biglock);
#endif
            err = vnode_create(VNCREATE_FLAVOR, (uint32_t)sizeof(params),
                               &params, &vn);
#if M_OSXFUSE_ENABLE_BIG_LOCK
            fuse_biglock_lock(mntdata->biglock);
#endif
        }

        if (err == 0) {
            if (markroot) {
                fvdat->parentvp = vn;
            } else {
                fvdat->parentvp = dvp;
            }
            if (oflags) {
                *oflags |= MAKEENTRY;
            }

            /* Need VT_OSXFUSE from xnu */
            vnode_settag(vn, VT_OTHER);

            cache_attrs(vn, fuse_entry_out, feo);

            HNodeAttachVNodeSucceeded(hn, 0 /* forkIndex */, vn);
            FUSE_OSAddAtomic(1, (SInt32 *)&fuse_vnodes_current);
        } else {
            if (HNodeAttachVNodeFailed(hn, 0 /* forkIndex */)) {
                FSNodeScrub(fvdat);
                HNodeScrubDone(hn);
            }
        }
    }

    if (err == 0) {
        if (vnode_vtype(vn) != vtyp) {
            IOLog("osxfuse: vnode changed type behind us (old=%d, new=%d)\n",
                  vnode_vtype(vn), vtyp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
            fuse_biglock_unlock(mntdata->biglock);
#endif
            fuse_internal_vnode_disappear(vn, context, REVOKE_SOFT);
            vnode_put(vn);
#if M_OSXFUSE_ENABLE_BIG_LOCK
            fuse_biglock_lock(mntdata->biglock);
#endif
            err = EIO;
        } else if (VTOFUD(vn)->generation != generation) {
            IOLog("osxfuse: vnode changed generation\n");
#if M_OSXFUSE_ENABLE_BIG_LOCK
            fuse_biglock_unlock(mntdata->biglock);
#endif
            fuse_internal_vnode_disappear(vn, context, REVOKE_SOFT);
            vnode_put(vn);
#if M_OSXFUSE_ENABLE_BIG_LOCK
            fuse_biglock_lock(mntdata->biglock);
#endif
            err = ESTALE;
        }
    }

    if (err == 0) {
        *vnPtr = vn;
    }

    /* assert((err == 0) == (*vnPtr != NULL); */

    return err;
}

int
fuse_vget_i(vnode_t              *vpp,
            uint32_t              flags,
            struct fuse_abi_data *feo,
            struct componentname *cnp,
            vnode_t               dvp,
            mount_t               mp,
            vfs_context_t         context)
{
    int err = 0;

    if (!feo) {
        return EINVAL;
    }

    err = FSNodeGetOrCreateFileVNodeByID(vpp, flags, feo, mp, dvp,
                                         context, NULL);
    if (err) {
        return err;
    }

    if (!fuse_isnovncache_mp(mp) && (cnp->cn_flags & MAKEENTRY)) {
        fuse_vncache_enter(dvp, *vpp, cnp);
    }

/* found: */

    VTOFUD(*vpp)->nlookup++;

    return 0;
}
Esempio n. 10
0
/*
 * Because of the vagaries of how a filehandle can be used, we try not to
 * be too smart in here (we try to be smart elsewhere). It is required that
 * you come in here only if you really do not have the said filehandle--else
 * we panic.
 */
int
fuse_filehandle_get(vnode_t       vp,
                    vfs_context_t context,
                    fufh_type_t   fufh_type,
                    int           mode)
{
    struct fuse_dispatcher  fdi;
    struct fuse_abi_data    foi;
    struct fuse_abi_data    foo;
    struct fuse_filehandle *fufh;
    struct fuse_vnode_data *fvdat = VTOFUD(vp);

    struct fuse_data        *data = fuse_get_mpdata(vnode_mount(vp));

    int err    = 0;
    int oflags = 0;
    int op     = FUSE_OPEN;

    fuse_trace_printf("fuse_filehandle_get(vp=%p, fufh_type=%d, mode=%x)\n",
                      vp, fufh_type, mode);

    fufh = &(fvdat->fufh[fufh_type]);

    if (FUFH_IS_VALID(fufh)) {
        panic("osxfuse: filehandle_get called despite valid fufh (type=%d)",
              fufh_type);
        /* NOTREACHED */
    }

    /*
     * Note that this means we are effectively FILTERING OUT open() flags.
     */
    (void)mode;
    oflags = fuse_filehandle_xlate_to_oflags(fufh_type);

    if (vnode_isdir(vp)) {
        op = FUSE_OPENDIR;
        if (fufh_type != FUFH_RDONLY) {
            IOLog("osxfuse: non-rdonly fufh requested for directory\n");
            fufh_type = FUFH_RDONLY;
        }
    }

    if (vnode_islnk(vp) && (mode & O_SYMLINK)) {
        oflags |= O_SYMLINK;
    }

    if ((mode & O_TRUNC) && (data->dataflags & FSESS_ATOMIC_O_TRUNC)) {
        oflags |= O_TRUNC;
    }

    fdisp_init_abi(&fdi, fuse_open_in, data);
    fdisp_make_vp(&fdi, op, vp, context);
    fuse_abi_data_init(&foi, DATOI(data), fdi.indata);

    fuse_open_in_set_flags(&foi, oflags);

    FUSE_OSAddAtomic(1, (SInt32 *)&fuse_fh_upcall_count);
    err = fdisp_wait_answ(&fdi);
    if (err) {
#if M_OSXFUSE_ENABLE_UNSUPPORTED
        const char *vname = vnode_getname(vp);
#endif /* M_OSXFUSE_ENABLE_UNSUPPORTED */
        if (err == ENOENT) {
            /*
             * See comment in fuse_vnop_reclaim().
             */
            cache_purge(vp);
        }
#if M_OSXFUSE_ENABLE_UNSUPPORTED
        IOLog("osxfuse: filehandle_get: failed for %s "
              "(type=%d, err=%d, caller=%p)\n",
              (vname) ? vname : "?", fufh_type, err,
               __builtin_return_address(0));
        if (vname) {
            vnode_putname(vname);
        }
#endif /* M_OSXFUSE_ENABLE_UNSUPPORTED */
        if (err == ENOENT) {
#if M_OSXFUSE_ENABLE_BIG_LOCK
            fuse_biglock_unlock(data->biglock);
#endif
            fuse_internal_vnode_disappear(vp, context, REVOKE_SOFT);
#if M_OSXFUSE_ENABLE_BIG_LOCK
            fuse_biglock_lock(data->biglock);
#endif
        }
        return err;
    }
    FUSE_OSAddAtomic(1, (SInt32 *)&fuse_fh_current);

    fuse_abi_data_init(&foo, DATOI(data), fdi.answ);

    fufh->fh_id = fuse_open_out_get_fh(&foo);
    fufh->open_count = 1;
    fufh->open_flags = oflags;
    fufh->fuse_open_flags = fuse_open_out_get_open_flags(&foo);
    fufh->aux_count = 0;

    fuse_ticket_release(fdi.tick);

    return 0;
}
Esempio n. 11
0
__private_extern__
int
fuse_internal_remove(vnode_t               dvp,
                     vnode_t               vp,
                     struct componentname *cnp,
                     enum fuse_opcode      op,
                     vfs_context_t         context)
{
    struct fuse_dispatcher fdi;

    struct vnode_attr *vap = VTOVA(vp);
    int need_invalidate = 0;
    uint64_t target_nlink = 0;
    mount_t mp = vnode_mount(vp);

    int err = 0;

    fdisp_init(&fdi, cnp->cn_namelen + 1);
    fdisp_make_vp(&fdi, op, dvp, context);

    memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
    ((char *)fdi.indata)[cnp->cn_namelen] = '\0';

    if ((vap->va_nlink > 1) && vnode_isreg(vp)) {
        need_invalidate = 1;
        target_nlink = vap->va_nlink;
    }

    if (!(err = fdisp_wait_answ(&fdi))) {
        fuse_ticket_drop(fdi.tick);
    }

    fuse_invalidate_attr(dvp);
    fuse_invalidate_attr(vp);

    /*
     * XXX: M_MACFUSE_INVALIDATE_CACHED_VATTRS_UPON_UNLINK
     *
     * Consider the case where vap->va_nlink > 1 for the entity being
     * removed. In our world, other in-memory vnodes that share a link
     * count each with this one may not know right way that this one just
     * got deleted. We should let them know, say, through a vnode_iterate()
     * here and a callback that does fuse_invalidate_attr(vp) on each
     * relevant vnode.
     */
    if (need_invalidate && !err) {
        if (!vfs_busy(mp, LK_NOWAIT)) {
#if M_MACFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_MACFUSE_ENABLE_HUGE_LOCK
            struct fuse_data *data = fuse_get_mpdata(mp);
            fuse_biglock_unlock(data->biglock);
#endif
            vnode_iterate(mp, 0, fuse_internal_remove_callback,
                          (void *)&target_nlink);
#if M_MACFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_MACFUSE_ENABLE_HUGE_LOCK
            fuse_biglock_lock(data->biglock);
#endif
            vfs_unbusy(mp);
        } else {
            IOLog("MacFUSE: skipping link count fixup upon remove\n");
        }
    }

    return err;
}
Esempio n. 12
0
__private_extern__
int
fuse_internal_access(vnode_t                   vp,
                     int                       action,
                     vfs_context_t             context,
                     struct fuse_access_param *facp)
{
    int err = 0;
    int default_error = 0;
    uint32_t mask = 0;
    int dataflags;
    mount_t mp;
    struct fuse_dispatcher fdi;
    struct fuse_access_in *fai;
    struct fuse_data      *data;

    fuse_trace_printf_func();

    mp = vnode_mount(vp);

    data = fuse_get_mpdata(mp);
    dataflags = data->dataflags;

    /* Allow for now; let checks be handled inline later. */
    if (fuse_isdeferpermissions_mp(mp)) {
        return 0;
    }

    if (facp->facc_flags & FACCESS_FROM_VNOP) {
        default_error = ENOTSUP;
    }

    /*
     * (action & KAUTH_VNODE_GENERIC_WRITE_BITS) on a read-only file system
     * would have been handled by higher layers.
     */

    if (!fuse_implemented(data, FSESS_NOIMPLBIT(ACCESS))) {
        return default_error;
    }

    /* Unless explicitly permitted, deny everyone except the fs owner. */
    if (!vnode_isvroot(vp) && !(facp->facc_flags & FACCESS_NOCHECKSPY)) {
        if (!(dataflags & FSESS_ALLOW_OTHER)) {
            int denied = fuse_match_cred(data->daemoncred,
                                         vfs_context_ucred(context));
            if (denied) {
                return EPERM;
            }
        }
        facp->facc_flags |= FACCESS_NOCHECKSPY;
    }

    if (!(facp->facc_flags & FACCESS_DO_ACCESS)) {
        return default_error;
    }

    if (vnode_isdir(vp)) {
        if (action & (KAUTH_VNODE_LIST_DIRECTORY   |
                      KAUTH_VNODE_READ_EXTATTRIBUTES)) {
            mask |= R_OK;
        }
        if (action & (KAUTH_VNODE_ADD_FILE         |
                      KAUTH_VNODE_ADD_SUBDIRECTORY |
                      KAUTH_VNODE_DELETE_CHILD)) {
            mask |= W_OK;
        }
        if (action & KAUTH_VNODE_SEARCH) {
            mask |= X_OK;
        }
    } else {
        if (action & (KAUTH_VNODE_READ_DATA | KAUTH_VNODE_READ_EXTATTRIBUTES)) {
            mask |= R_OK;
        }
        if (action & (KAUTH_VNODE_WRITE_DATA | KAUTH_VNODE_APPEND_DATA)) {
            mask |= W_OK;
        }
        if (action & KAUTH_VNODE_EXECUTE) {
            mask |= X_OK;
        }
    }

    if (action & (KAUTH_VNODE_WRITE_ATTRIBUTES    |
                  KAUTH_VNODE_WRITE_EXTATTRIBUTES |
                  KAUTH_VNODE_WRITE_SECURITY)) {
        mask |= W_OK;
    }

    bzero(&fdi, sizeof(fdi));

    fdisp_init(&fdi, sizeof(*fai));
    fdisp_make_vp(&fdi, FUSE_ACCESS, vp, context);

    fai = fdi.indata;
    fai->mask = F_OK;
    fai->mask |= mask;

    if (!(err = fdisp_wait_answ(&fdi))) {
        fuse_ticket_drop(fdi.tick);
    }

    if (err == ENOSYS) {
        /*
         * Make sure we don't come in here again.
         */
        vfs_clearauthopaque(mp);
        fuse_clear_implemented(data, FSESS_NOIMPLBIT(ACCESS));
        err = default_error;
    }

    if (err == ENOENT) {

        const char *vname = NULL;

#if M_MACFUSE_ENABLE_UNSUPPORTED
        vname = vnode_getname(vp);
#endif /* M_MACFUSE_ENABLE_UNSUPPORTED */

        IOLog("MacFUSE: disappearing vnode %p (name=%s type=%d action=%x)\n",
              vp, (vname) ? vname : "?", vnode_vtype(vp), action);

#if M_MACFUSE_ENABLE_UNSUPPORTED
        if (vname) {
            vnode_putname(vname);
        }
#endif /* M_MACFUSE_ENABLE_UNSUPPORTED */

        /*
         * On 10.4, I think I can get Finder to lock because of /.Trashes/<uid>
         * unless I use REVOKE_NONE here.
         */
         
#if M_MACFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_MACFUSE_ENABLE_HUGE_LOCK
        fuse_biglock_unlock(data->biglock);
#endif
        fuse_internal_vnode_disappear(vp, context, REVOKE_SOFT);
#if M_MACFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_MACFUSE_ENABLE_HUGE_LOCK
        fuse_biglock_lock(data->biglock);
#endif
    }

    return err;
}
Esempio n. 13
0
static errno_t
fuse_vfsop_mount(mount_t mp, __unused vnode_t devvp, user_addr_t udata,
                 vfs_context_t context)
{
    int err      = 0;
    int mntopts  = 0;
    bool mounted = false;

    uint32_t drandom  = 0;
    uint32_t max_read = ~0;

    size_t len;

    fuse_device_t      fdev = NULL;
    struct fuse_data  *data = NULL;
    fuse_mount_args    fusefs_args;
    struct vfsstatfs  *vfsstatfsp = vfs_statfs(mp);

    kern_return_t kr;
    thread_t      init_thread;

#if M_OSXFUSE_ENABLE_BIG_LOCK
    fuse_biglock_t    *biglock;
#endif

    fuse_trace_printf_vfsop();

    if (vfs_isupdate(mp)) {
        return ENOTSUP;
    }

    err = copyin(udata, &fusefs_args, sizeof(fusefs_args));
    if (err) {
        return EINVAL;
    }

    /*
     * Interesting flags that we can receive from mount or may want to
     * otherwise forcibly set include:
     *
     *     MNT_ASYNC
     *     MNT_AUTOMOUNTED
     *     MNT_DEFWRITE
     *     MNT_DONTBROWSE
     *     MNT_IGNORE_OWNERSHIP
     *     MNT_JOURNALED
     *     MNT_NODEV
     *     MNT_NOEXEC
     *     MNT_NOSUID
     *     MNT_NOUSERXATTR
     *     MNT_RDONLY
     *     MNT_SYNCHRONOUS
     *     MNT_UNION
     */

#if M_OSXFUSE_ENABLE_UNSUPPORTED
    vfs_setlocklocal(mp);
#endif /* M_OSXFUSE_ENABLE_UNSUPPORTED */

    /** Option Processing. **/

    if (fusefs_args.altflags & FUSE_MOPT_FSTYPENAME) {
        size_t typenamelen = strlen(fusefs_args.fstypename);
        if ((typenamelen <= 0) || (typenamelen > FUSE_FSTYPENAME_MAXLEN)) {
            return EINVAL;
        }
        snprintf(vfsstatfsp->f_fstypename, MFSTYPENAMELEN, "%s%s",
                 OSXFUSE_FSTYPENAME_PREFIX, fusefs_args.fstypename);
    }

    if ((fusefs_args.daemon_timeout > FUSE_MAX_DAEMON_TIMEOUT) ||
        (fusefs_args.daemon_timeout < FUSE_MIN_DAEMON_TIMEOUT)) {
        return EINVAL;
    }

    if (fusefs_args.altflags & FUSE_MOPT_SPARSE) {
        mntopts |= FSESS_SPARSE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_SLOW_STATFS) {
        mntopts |= FSESS_SLOW_STATFS;
    }

    if (fusefs_args.altflags & FUSE_MOPT_AUTO_CACHE) {
        mntopts |= FSESS_AUTO_CACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_AUTO_XATTR) {
        if (fusefs_args.altflags & FUSE_MOPT_NATIVE_XATTR) {
            return EINVAL;
        }
        mntopts |= FSESS_AUTO_XATTR;
    } else if (fusefs_args.altflags & FUSE_MOPT_NATIVE_XATTR) {
        mntopts |= FSESS_NATIVE_XATTR;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_BROWSE) {
        vfs_setflags(mp, MNT_DONTBROWSE);
    }

    if (fusefs_args.altflags & FUSE_MOPT_JAIL_SYMLINKS) {
        mntopts |= FSESS_JAIL_SYMLINKS;
    }

    /*
     * Note that unlike Linux, which keeps allow_root in user-space and
     * passes allow_other in that case to the kernel, we let allow_root
     * reach the kernel. The 'if' ordering is important here.
     */
    if (fusefs_args.altflags & FUSE_MOPT_ALLOW_ROOT) {
        int is_member = 0;
        if ((kauth_cred_ismember_gid(kauth_cred_get(), fuse_admin_group,
                                     &is_member) == 0) && is_member) {
            mntopts |= FSESS_ALLOW_ROOT;
        } else {
            IOLog("OSXFUSE: caller not a member of OSXFUSE admin group (%d)\n",
                  fuse_admin_group);
            return EPERM;
        }
    } else if (fusefs_args.altflags & FUSE_MOPT_ALLOW_OTHER) {
        if (!fuse_allow_other && !fuse_vfs_context_issuser(context)) {
            int is_member = 0;
            if ((kauth_cred_ismember_gid(kauth_cred_get(), fuse_admin_group,
                                         &is_member) != 0) || !is_member) {
                return EPERM;
            }
        }
        mntopts |= FSESS_ALLOW_OTHER;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_APPLEDOUBLE) {
        mntopts |= FSESS_NO_APPLEDOUBLE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_APPLEXATTR) {
        mntopts |= FSESS_NO_APPLEXATTR;
    }

    if ((fusefs_args.altflags & FUSE_MOPT_FSID) && (fusefs_args.fsid != 0)) {
        fsid_t   fsid;
        mount_t  other_mp;
        uint32_t target_dev;

        target_dev = FUSE_MAKEDEV(FUSE_CUSTOM_FSID_DEVICE_MAJOR,
                                  fusefs_args.fsid);

        fsid.val[0] = target_dev;
        fsid.val[1] = FUSE_CUSTOM_FSID_VAL1;

        other_mp = vfs_getvfs(&fsid);
        if (other_mp != NULL) {
            return EPERM;
        }

        vfsstatfsp->f_fsid.val[0] = target_dev;
        vfsstatfsp->f_fsid.val[1] = FUSE_CUSTOM_FSID_VAL1;

    } else {
        vfs_getnewfsid(mp);
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_LOCALCACHES) {
        mntopts |= FSESS_NO_ATTRCACHE;
        mntopts |= FSESS_NO_READAHEAD;
        mntopts |= FSESS_NO_UBC;
        mntopts |= FSESS_NO_VNCACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_ATTRCACHE) {
        mntopts |= FSESS_NO_ATTRCACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_READAHEAD) {
        mntopts |= FSESS_NO_READAHEAD;
    }

    if (fusefs_args.altflags & (FUSE_MOPT_NO_UBC | FUSE_MOPT_DIRECT_IO)) {
        mntopts |= FSESS_NO_UBC;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_VNCACHE) {
        mntopts |= FSESS_NO_VNCACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NEGATIVE_VNCACHE) {
        if (mntopts & FSESS_NO_VNCACHE) {
            return EINVAL;
        }
        mntopts |= FSESS_NEGATIVE_VNCACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_SYNCWRITES) {

        /* Cannot mix 'nosyncwrites' with 'noubc' or 'noreadahead'. */
        if (mntopts & (FSESS_NO_READAHEAD | FSESS_NO_UBC)) {
            return EINVAL;
        }

        mntopts |= FSESS_NO_SYNCWRITES;
        vfs_clearflags(mp, MNT_SYNCHRONOUS);
        vfs_setflags(mp, MNT_ASYNC);

        /* We check for this only if we have nosyncwrites in the first place. */
        if (fusefs_args.altflags & FUSE_MOPT_NO_SYNCONCLOSE) {
            mntopts |= FSESS_NO_SYNCONCLOSE;
        }

    } else {
        vfs_clearflags(mp, MNT_ASYNC);
        vfs_setflags(mp, MNT_SYNCHRONOUS);
    }

    if (mntopts & FSESS_NO_UBC) {
        /* If no buffer cache, disallow exec from file system. */
        vfs_setflags(mp, MNT_NOEXEC);
    }

    vfs_setauthopaque(mp);
    vfs_setauthopaqueaccess(mp);

    if ((fusefs_args.altflags & FUSE_MOPT_DEFAULT_PERMISSIONS) &&
        (fusefs_args.altflags & FUSE_MOPT_DEFER_PERMISSIONS)) {
        return EINVAL;
    }

    if (fusefs_args.altflags & FUSE_MOPT_DEFAULT_PERMISSIONS) {
        mntopts |= FSESS_DEFAULT_PERMISSIONS;
        vfs_clearauthopaque(mp);
    }

    if (fusefs_args.altflags & FUSE_MOPT_DEFER_PERMISSIONS) {
        mntopts |= FSESS_DEFER_PERMISSIONS;
    }

    if (fusefs_args.altflags & FUSE_MOPT_EXTENDED_SECURITY) {
        mntopts |= FSESS_EXTENDED_SECURITY;
        vfs_setextendedsecurity(mp);
    }

    if (fusefs_args.altflags & FUSE_MOPT_LOCALVOL) {
        mntopts |= FSESS_LOCALVOL;
        vfs_setflags(mp, MNT_LOCAL);
    }

    /* done checking incoming option bits */

    err = 0;

    vfs_setfsprivate(mp, NULL);

    fdev = fuse_device_get(fusefs_args.rdev);
    if (!fdev) {
        return EINVAL;
    }

    fuse_device_lock(fdev);

    drandom = fuse_device_get_random(fdev);
    if (fusefs_args.random != drandom) {
        fuse_device_unlock(fdev);
        IOLog("OSXFUSE: failing mount because of mismatched random\n");
        return EINVAL;
    }

    data = fuse_device_get_mpdata(fdev);

    if (!data) {
        fuse_device_unlock(fdev);
        return ENXIO;
    }

#if M_OSXFUSE_ENABLE_BIG_LOCK
    biglock = data->biglock;
    fuse_biglock_lock(biglock);
#endif

    if (data->mount_state != FM_NOTMOUNTED) {
#if M_OSXFUSE_ENABLE_BIG_LOCK
        fuse_biglock_unlock(biglock);
#endif
        fuse_device_unlock(fdev);
        return EALREADY;
    }

    if (!(data->dataflags & FSESS_OPENED)) {
        fuse_device_unlock(fdev);
        err = ENXIO;
        goto out;
    }

    data->mount_state = FM_MOUNTED;
    OSAddAtomic(1, (SInt32 *)&fuse_mount_count);
    mounted = true;

    if (fdata_dead_get(data)) {
        fuse_device_unlock(fdev);
        err = ENOTCONN;
        goto out;
    }

    if (!data->daemoncred) {
        panic("OSXFUSE: daemon found but identity unknown");
    }

    if (fuse_vfs_context_issuser(context) &&
        kauth_cred_getuid(vfs_context_ucred(context)) != kauth_cred_getuid(data->daemoncred)) {
        fuse_device_unlock(fdev);
        err = EPERM;
        goto out;
    }

    data->mp = mp;
    data->fdev = fdev;
    data->dataflags |= mntopts;

    data->daemon_timeout.tv_sec =  fusefs_args.daemon_timeout;
    data->daemon_timeout.tv_nsec = 0;
    if (data->daemon_timeout.tv_sec) {
        data->daemon_timeout_p = &(data->daemon_timeout);
    } else {
        data->daemon_timeout_p = (struct timespec *)0;
    }

    data->max_read = max_read;
    data->fssubtype = fusefs_args.fssubtype;
    data->mountaltflags = fusefs_args.altflags;
    data->noimplflags = (uint64_t)0;

    data->blocksize = fuse_round_size(fusefs_args.blocksize,
                                      FUSE_MIN_BLOCKSIZE, FUSE_MAX_BLOCKSIZE);

    data->iosize = fuse_round_size(fusefs_args.iosize,
                                   FUSE_MIN_IOSIZE, FUSE_MAX_IOSIZE);

    if (data->iosize < data->blocksize) {
        data->iosize = data->blocksize;
    }

    data->userkernel_bufsize = FUSE_DEFAULT_USERKERNEL_BUFSIZE;

    copystr(fusefs_args.fsname, vfsstatfsp->f_mntfromname,
            MNAMELEN - 1, &len);
    bzero(vfsstatfsp->f_mntfromname + len, MNAMELEN - len);

    copystr(fusefs_args.volname, data->volname, MAXPATHLEN - 1, &len);
    bzero(data->volname + len, MAXPATHLEN - len);

    /* previous location of vfs_setioattr() */

    vfs_setfsprivate(mp, data);

    fuse_device_unlock(fdev);

    /* Send a handshake message to the daemon. */
    kr = kernel_thread_start(fuse_internal_init, data, &init_thread);
    if (kr != KERN_SUCCESS) {
        IOLog("OSXFUSE: could not start init thread\n");
        err = ENOTCONN;
    } else {
        thread_deallocate(init_thread);
    }

out:
    if (err) {
        vfs_setfsprivate(mp, NULL);

        fuse_device_lock(fdev);
        data = fuse_device_get_mpdata(fdev); /* again */
        if (mounted) {
            OSAddAtomic(-1, (SInt32 *)&fuse_mount_count);
        }
        if (data) {
            data->mount_state = FM_NOTMOUNTED;
            if (!(data->dataflags & FSESS_OPENED)) {
#if M_OSXFUSE_ENABLE_BIG_LOCK
                assert(biglock == data->biglock);
                fuse_biglock_unlock(biglock);
#endif
                fuse_device_close_final(fdev);
                /* data is gone now */
            }
        }
        fuse_device_unlock(fdev);
    } else {
        vnode_t fuse_rootvp = NULLVP;
        err = fuse_vfsop_root(mp, &fuse_rootvp, context);
        if (err) {
            goto out; /* go back and follow error path */
        }
        err = vnode_ref(fuse_rootvp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
        /*
         * Even though fuse_rootvp will not be reclaimed when calling vnode_put
         * because we incremented its usecount by calling vnode_ref release
         * biglock just to be safe.
         */
        fuse_biglock_unlock(biglock);
#endif /* M_OSXFUSE_ENABLE_BIG_LOCK */
        (void)vnode_put(fuse_rootvp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
        fuse_biglock_lock(biglock);
#endif
        if (err) {
            goto out; /* go back and follow error path */
        } else {
            struct vfsioattr ioattr;

            vfs_ioattr(mp, &ioattr);
            ioattr.io_maxreadcnt = ioattr.io_maxwritecnt = data->iosize;
            ioattr.io_segreadcnt = ioattr.io_segwritecnt = data->iosize / PAGE_SIZE;
            ioattr.io_maxsegreadsize = ioattr.io_maxsegwritesize = data->iosize;
            ioattr.io_devblocksize = data->blocksize;
            vfs_setioattr(mp, &ioattr);
        }
    }

#if M_OSXFUSE_ENABLE_BIG_LOCK
    fuse_device_lock(fdev);
    data = fuse_device_get_mpdata(fdev); /* ...and again */
    if(data) {
        assert(data->biglock == biglock);
        fuse_biglock_unlock(biglock);
    }
    fuse_device_unlock(fdev);
#endif

    return err;
}
Esempio n. 14
0
static errno_t
fuse_vfsop_setattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t context)
{
    int error = 0;

    fuse_trace_printf_vfsop();

    kauth_cred_t cred = vfs_context_ucred(context);

    if (!fuse_vfs_context_issuser(context) &&
        (kauth_cred_getuid(cred) != vfs_statfs(mp)->f_owner)) {
        return EACCES;
    }

    struct fuse_data *data = fuse_get_mpdata(mp);

    if (VFSATTR_IS_ACTIVE(fsap, f_vol_name)) {

        if (!fuse_implemented(data, FSESS_NOIMPLBIT(SETVOLNAME))) {
            error = ENOTSUP;
            goto out;
        }

        if (fsap->f_vol_name[0] == 0) {
            error = EINVAL;
            goto out;
        }

        size_t namelen = strlen(fsap->f_vol_name);
        if (namelen >= MAXPATHLEN) {
            error = ENAMETOOLONG;
            goto out;
        }

        vnode_t root_vp;

        error = fuse_vfsop_root(mp, &root_vp, context);
        if (error) {
            goto out;
        }

        struct fuse_dispatcher fdi;
        fdisp_init(&fdi, namelen + 1);
        fdisp_make_vp(&fdi, FUSE_SETVOLNAME, root_vp, context);
        memcpy((char *)fdi.indata, fsap->f_vol_name, namelen);
        ((char *)fdi.indata)[namelen] = '\0';

        error = fdisp_wait_answ(&fdi);
        if (!error) {
            fuse_ticket_release(fdi.tick);
        }

#if M_OSXFUSE_ENABLE_BIG_LOCK
        fuse_biglock_unlock(data->biglock);
#endif
        (void)vnode_put(root_vp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
        fuse_biglock_lock(data->biglock);
#endif

        if (error) {
            if (error == ENOSYS) {
                error = ENOTSUP;
                fuse_clear_implemented(data, FSESS_NOIMPLBIT(SETVOLNAME));
            }
            goto out;
        }

        copystr(fsap->f_vol_name, data->volname, MAXPATHLEN - 1, &namelen);
        bzero(data->volname + namelen, MAXPATHLEN - namelen);

        VFSATTR_SET_SUPPORTED(fsap, f_vol_name);
    }

out:
    return error;
}