nandfs_ifile.c

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    1 /*-
    2  * Copyright (c) 2010-2012 Semihalf.
    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  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/10.4/sys/fs/nandfs/nandfs_ifile.c 235537 2012-05-17 10:11:18Z gber $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/conf.h>
   33 #include <sys/kernel.h>
   34 #include <sys/lock.h>
   35 #include <sys/malloc.h>
   36 #include <sys/mount.h>
   37 #include <sys/mutex.h>
   38 #include <sys/namei.h>
   39 #include <sys/sysctl.h>
   40 #include <sys/vnode.h>
   41 #include <sys/buf.h>
   42 #include <sys/bio.h>
   43 
   44 #include <vm/vm.h>
   45 #include <vm/vm_param.h>
   46 #include <vm/vm_kern.h>
   47 #include <vm/vm_page.h>
   48 
   49 #include <fs/nandfs/nandfs_mount.h>
   50 #include <fs/nandfs/nandfs.h>
   51 #include <fs/nandfs/nandfs_subr.h>
   52 
   53 int
   54 nandfs_node_create(struct nandfsmount *nmp, struct nandfs_node **node,
   55     uint16_t mode)
   56 {
   57         struct nandfs_alloc_request req;
   58         struct nandfs_device *nandfsdev;
   59         struct nandfs_mdt *mdt;
   60         struct nandfs_node *ifile;
   61         struct nandfs_inode *inode;
   62         struct vnode *vp;
   63         uint32_t entry;
   64         int error = 0;
   65 
   66         nandfsdev = nmp->nm_nandfsdev;
   67         mdt = &nandfsdev->nd_ifile_mdt;
   68         ifile = nmp->nm_ifile_node;
   69         vp = NTOV(ifile);
   70 
   71         VOP_LOCK(vp, LK_EXCLUSIVE);
   72         /* Allocate new inode in ifile */
   73         req.entrynum = nandfsdev->nd_last_ino + 1;
   74         error = nandfs_find_free_entry(mdt, ifile, &req);
   75         if (error) {
   76                 VOP_UNLOCK(vp, 0);
   77                 return (error);
   78         }
   79 
   80         error = nandfs_get_entry_block(mdt, ifile, &req, &entry, 1);
   81         if (error) {
   82                 VOP_UNLOCK(vp, 0);
   83                 return (error);
   84         }
   85 
   86         /* Inode initialization */
   87         inode = ((struct nandfs_inode *) req.bp_entry->b_data) + entry;
   88         nandfs_inode_init(inode, mode);
   89 
   90         error = nandfs_alloc_entry(mdt, &req);
   91         if (error) {
   92                 VOP_UNLOCK(vp, 0);
   93                 return (error);
   94         }
   95 
   96         VOP_UNLOCK(vp, 0);
   97 
   98         nandfsdev->nd_last_ino = req.entrynum;
   99         error = nandfs_get_node(nmp, req.entrynum, node);
  100         DPRINTF(IFILE, ("%s: node: %p ino: %#jx\n",
  101             __func__, node, (uintmax_t)((*node)->nn_ino)));
  102 
  103         return (error);
  104 }
  105 
  106 int
  107 nandfs_node_destroy(struct nandfs_node *node)
  108 {
  109         struct nandfs_alloc_request req;
  110         struct nandfsmount *nmp;
  111         struct nandfs_mdt *mdt;
  112         struct nandfs_node *ifile;
  113         struct vnode *vp;
  114         int error = 0;
  115 
  116         nmp = node->nn_nmp;
  117         req.entrynum = node->nn_ino;
  118         mdt = &nmp->nm_nandfsdev->nd_ifile_mdt;
  119         ifile = nmp->nm_ifile_node;
  120         vp = NTOV(ifile);
  121 
  122         DPRINTF(IFILE, ("%s: destroy node: %p ino: %#jx\n",
  123             __func__, node, (uintmax_t)node->nn_ino));
  124         VOP_LOCK(vp, LK_EXCLUSIVE);
  125 
  126         error = nandfs_find_entry(mdt, ifile, &req);
  127         if (error) {
  128                 nandfs_error("%s: finding entry error:%d node %p(%jx)",
  129                     __func__, error, node, node->nn_ino);
  130                 VOP_UNLOCK(vp, 0);
  131                 return (error);
  132         }
  133 
  134         nandfs_inode_destroy(&node->nn_inode);
  135 
  136         error = nandfs_free_entry(mdt, &req);
  137         if (error) {
  138                 nandfs_error("%s: freing entry error:%d node %p(%jx)",
  139                     __func__, error, node, node->nn_ino);
  140                 VOP_UNLOCK(vp, 0);
  141                 return (error);
  142         }
  143 
  144         VOP_UNLOCK(vp, 0);
  145         DPRINTF(IFILE, ("%s: freed node %p ino %#jx\n",
  146             __func__, node, (uintmax_t)node->nn_ino));
  147         return (error);
  148 }
  149 
  150 int
  151 nandfs_node_update(struct nandfs_node *node)
  152 {
  153         struct nandfs_alloc_request req;
  154         struct nandfsmount *nmp;
  155         struct nandfs_mdt *mdt;
  156         struct nandfs_node *ifile;
  157         struct nandfs_inode *inode;
  158         uint32_t index;
  159         int error = 0;
  160 
  161         nmp = node->nn_nmp;
  162         ifile = nmp->nm_ifile_node;
  163         ASSERT_VOP_LOCKED(NTOV(ifile), __func__);
  164 
  165         req.entrynum = node->nn_ino;
  166         mdt = &nmp->nm_nandfsdev->nd_ifile_mdt;
  167 
  168         DPRINTF(IFILE, ("%s: node:%p ino:%#jx\n",
  169             __func__, &node->nn_inode, (uintmax_t)node->nn_ino));
  170 
  171         error = nandfs_get_entry_block(mdt, ifile, &req, &index, 0);
  172         if (error) {
  173                 printf("nandfs_get_entry_block returned with ERROR=%d\n",
  174                     error);
  175                 return (error);
  176         }
  177 
  178         inode = ((struct nandfs_inode *) req.bp_entry->b_data) + index;
  179         memcpy(inode, &node->nn_inode, sizeof(*inode));
  180         error = nandfs_dirty_buf(req.bp_entry, 0);
  181 
  182         return (error);
  183 }
  184 
  185 int
  186 nandfs_get_node_entry(struct nandfsmount *nmp, struct nandfs_inode **inode,
  187     uint64_t ino, struct buf **bp)
  188 {
  189         struct nandfs_alloc_request req;
  190         struct nandfs_mdt *mdt;
  191         struct nandfs_node *ifile;
  192         struct vnode *vp;
  193         uint32_t index;
  194         int error = 0;
  195 
  196         req.entrynum = ino;
  197         mdt = &nmp->nm_nandfsdev->nd_ifile_mdt;
  198         ifile = nmp->nm_ifile_node;
  199         vp = NTOV(ifile);
  200 
  201         VOP_LOCK(vp, LK_EXCLUSIVE);
  202         error = nandfs_get_entry_block(mdt, ifile, &req, &index, 0);
  203         if (error) {
  204                 VOP_UNLOCK(vp, 0);
  205                 return (error);
  206         }
  207 
  208         *inode = ((struct nandfs_inode *) req.bp_entry->b_data) + index;
  209         *bp = req.bp_entry;
  210         VOP_UNLOCK(vp, 0);
  211         return (0);
  212 }
  213

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

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