nandfs_bmap.c

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    1 /*-
    2  * Copyright (c) 2010-2012 Semihalf
    3  * Copyright (c) 2008, 2009 Reinoud Zandijk
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * From: NetBSD: nilfs_subr.c,v 1.4 2009/07/29 17:06:57 reinoud
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/10.4/sys/fs/nandfs/nandfs_bmap.c 235537 2012-05-17 10:11:18Z gber $");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/namei.h>
   35 #include <sys/kernel.h>
   36 #include <sys/stat.h>
   37 #include <sys/buf.h>
   38 #include <sys/bio.h>
   39 #include <sys/proc.h>
   40 #include <sys/mount.h>
   41 #include <sys/vnode.h>
   42 #include <sys/signalvar.h>
   43 #include <sys/malloc.h>
   44 #include <sys/dirent.h>
   45 #include <sys/lockf.h>
   46 #include <sys/ktr.h>
   47 
   48 #include <vm/vm.h>
   49 #include <vm/vm_extern.h>
   50 #include <vm/vm_object.h>
   51 #include <vm/vnode_pager.h>
   52 
   53 #include <machine/_inttypes.h>
   54 
   55 #include <vm/vm.h>
   56 #include <vm/vm_extern.h>
   57 #include <vm/vm_object.h>
   58 #include <vm/vnode_pager.h>
   59 
   60 #include "nandfs_mount.h"
   61 #include "nandfs.h"
   62 #include "nandfs_subr.h"
   63 #include "bmap.h"
   64 
   65 nandfs_lbn_t
   66 nandfs_get_maxfilesize(struct nandfs_device *fsdev)
   67 {
   68 
   69         return (get_maxfilesize(fsdev));
   70 }
   71 
   72 int
   73 nandfs_bmap_lookup(struct nandfs_node *node, nandfs_lbn_t lblk,
   74     nandfs_daddr_t *vblk)
   75 {
   76         int error = 0;
   77 
   78         if (node->nn_ino == NANDFS_GC_INO && lblk >= 0)
   79                 *vblk = lblk;
   80         else
   81                 error = bmap_lookup(node, lblk, vblk);
   82 
   83         DPRINTF(TRANSLATE, ("%s: error %d ino %#jx lblocknr %#jx -> %#jx\n",
   84             __func__, error, (uintmax_t)node->nn_ino, (uintmax_t)lblk,
   85             (uintmax_t)*vblk));
   86 
   87         if (error)
   88                 nandfs_error("%s: returned %d", __func__, error);
   89 
   90         return (error);
   91 }
   92 
   93 int
   94 nandfs_bmap_insert_block(struct nandfs_node *node, nandfs_lbn_t lblk,
   95     struct buf *bp)
   96 {
   97         struct nandfs_device *fsdev;
   98         nandfs_daddr_t vblk;
   99         int error;
  100 
  101         fsdev = node->nn_nandfsdev;
  102 
  103         vblk = 0;
  104         if (node->nn_ino != NANDFS_DAT_INO) {
  105                 error = nandfs_vblock_alloc(fsdev, &vblk);
  106                 if (error)
  107                         return (error);
  108         }
  109 
  110         nandfs_buf_set(bp, NANDFS_VBLK_ASSIGNED);
  111         nandfs_vblk_set(bp, vblk);
  112 
  113         error = bmap_insert_block(node, lblk, vblk);
  114         if (error) {
  115                 nandfs_vblock_free(fsdev, vblk);
  116                 return (error);
  117         }
  118 
  119         return (0);
  120 }
  121 
  122 int
  123 nandfs_bmap_dirty_blocks(struct nandfs_node *node, struct buf *bp, int force)
  124 {
  125         int error;
  126 
  127         error = bmap_dirty_meta(node, bp->b_lblkno, force);
  128         if (error)
  129                 nandfs_error("%s: cannot dirty buffer %p\n",
  130                     __func__, bp);
  131 
  132         return (error);
  133 }
  134 
  135 static int
  136 nandfs_bmap_update_mapping(struct nandfs_node *node, nandfs_lbn_t lblk,
  137     nandfs_daddr_t blknr)
  138 {
  139         int error;
  140 
  141         DPRINTF(BMAP,
  142             ("%s: node: %p ino: %#jx lblk: %#jx vblk: %#jx\n",
  143             __func__, node, (uintmax_t)node->nn_ino, (uintmax_t)lblk,
  144             (uintmax_t)blknr));
  145 
  146         error = bmap_insert_block(node, lblk, blknr);
  147 
  148         return (error);
  149 }
  150 
  151 int
  152 nandfs_bmap_update_block(struct nandfs_node *node, struct buf *bp,
  153     nandfs_lbn_t blknr)
  154 {
  155         nandfs_lbn_t lblk;
  156         int error;
  157 
  158         lblk = bp->b_lblkno;
  159         nandfs_vblk_set(bp, blknr);
  160 
  161         DPRINTF(BMAP, ("%s: node: %p ino: %#jx bp: %p lblk: %#jx blk: %#jx\n",
  162             __func__, node, (uintmax_t)node->nn_ino, bp,
  163             (uintmax_t)lblk, (uintmax_t)blknr));
  164 
  165         error = nandfs_bmap_update_mapping(node, lblk, blknr);
  166         if (error) {
  167                 nandfs_error("%s: cannot update lblk:%jx to blk:%jx for "
  168                     "node:%p, error:%d\n", __func__, (uintmax_t)lblk,
  169                     (uintmax_t)blknr, node, error);
  170                 return (error);
  171         }
  172 
  173         return (error);
  174 }
  175 
  176 int
  177 nandfs_bmap_update_dat(struct nandfs_node *node, nandfs_daddr_t oldblk,
  178     struct buf *bp)
  179 {
  180         struct nandfs_device *fsdev;
  181         nandfs_daddr_t vblk = 0;
  182         int error;
  183 
  184         if (node->nn_ino == NANDFS_DAT_INO)
  185                 return (0);
  186 
  187         if (nandfs_buf_check(bp, NANDFS_VBLK_ASSIGNED)) {
  188                 nandfs_buf_clear(bp, NANDFS_VBLK_ASSIGNED);
  189                 return (0);
  190         }
  191 
  192         fsdev = node->nn_nandfsdev;
  193 
  194         /* First alloc new virtual block.... */
  195         error = nandfs_vblock_alloc(fsdev, &vblk);
  196         if (error)
  197                 return (error);
  198 
  199         error = nandfs_bmap_update_block(node, bp, vblk);
  200         if (error)
  201                 return (error);
  202 
  203         /* Then we can end up with old one */
  204         nandfs_vblock_end(fsdev, oldblk);
  205 
  206         DPRINTF(BMAP,
  207             ("%s: ino %#jx block %#jx: update vblk %#jx to %#jx\n",
  208             __func__, (uintmax_t)node->nn_ino, (uintmax_t)bp->b_lblkno,
  209             (uintmax_t)oldblk, (uintmax_t)vblk));
  210         return (error);
  211 }
  212 
  213 int
  214 nandfs_bmap_truncate_mapping(struct nandfs_node *node, nandfs_lbn_t oblk,
  215     nandfs_lbn_t nblk)
  216 {
  217         nandfs_lbn_t todo;
  218         int error;
  219 
  220         todo = oblk - nblk;
  221 
  222         DPRINTF(BMAP, ("%s: node %p oblk %jx nblk %jx truncate by %jx\n",
  223             __func__, node, oblk, nblk, todo));
  224 
  225         error = bmap_truncate_mapping(node, oblk, todo);
  226         if (error)
  227                 return (error);
  228 
  229         return (error);
  230 }

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FreeBSD/Linux Kernel Cross Reference sys/fs/nandfs/nandfs_bmap.c

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sys/fs/nandfs/nandfs_bmap.c