- if (vp->v_type != VREG) {
- ZFS_EXIT(zfsvfs);
- return (ENODEV);
- }
-
- /*
- * If file is locked, disallow mapping.
- */
- if (MANDMODE(zp->z_mode) && vn_has_flocks(vp)) {
- ZFS_EXIT(zfsvfs);
- return (EAGAIN);
- }
-
- as_rangelock(as);
- error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags);
- if (error != 0) {
- as_rangeunlock(as);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- vn_a.vp = vp;
- vn_a.offset = (u_offset_t)off;
- vn_a.type = flags & MAP_TYPE;
- vn_a.prot = prot;
- vn_a.maxprot = maxprot;
- vn_a.cred = cr;
- vn_a.amp = NULL;
- vn_a.flags = flags & ~MAP_TYPE;
- vn_a.szc = 0;
- vn_a.lgrp_mem_policy_flags = 0;
-
- error = as_map(as, *addrp, len, segvn_create, &vn_a);
-
- as_rangeunlock(as);
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/* ARGSUSED */
-static int
-zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr,
- size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr)
-{
- uint64_t pages = btopr(len);
-
- atomic_add_64(&VTOZ(vp)->z_mapcnt, pages);
- return (0);
-}
-
-/*
- * The reason we push dirty pages as part of zfs_delmap() is so that we get a
- * more accurate mtime for the associated file. Since we don't have a way of
- * detecting when the data was actually modified, we have to resort to
- * heuristics. If an explicit msync() is done, then we mark the mtime when the
- * last page is pushed. The problem occurs when the msync() call is omitted,
- * which by far the most common case:
- *
- * open()
- * mmap()
- * <modify memory>
- * munmap()
- * close()
- * <time lapse>
- * putpage() via fsflush
- *
- * If we wait until fsflush to come along, we can have a modification time that
- * is some arbitrary point in the future. In order to prevent this in the
- * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is
- * torn down.
- */
-/* ARGSUSED */
-static int
-zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr,
- size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr)
-{
- uint64_t pages = btopr(len);
-
- ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages);
- atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages);
-
- if ((flags & MAP_SHARED) && (prot & PROT_WRITE) &&
- vn_has_cached_data(vp))
- (void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr, ct);
-