nandfs_ifile.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2010-2012 Semihalf.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/conf.h>
   35 #include <sys/kernel.h>
   36 #include <sys/lock.h>
   37 #include <sys/malloc.h>
   38 #include <sys/mount.h>
   39 #include <sys/mutex.h>
   40 #include <sys/namei.h>
   41 #include <sys/sysctl.h>
   42 #include <sys/vnode.h>
   43 #include <sys/buf.h>
   44 #include <sys/bio.h>
   45 
   46 #include <vm/vm.h>
   47 #include <vm/vm_param.h>
   48 #include <vm/vm_kern.h>
   49 #include <vm/vm_page.h>
   50 
   51 #include <fs/nandfs/nandfs_mount.h>
   52 #include <fs/nandfs/nandfs.h>
   53 #include <fs/nandfs/nandfs_subr.h>
   54 
   55 int
   56 nandfs_node_create(struct nandfsmount *nmp, struct nandfs_node **node,
   57     uint16_t mode)
   58 {
   59         struct nandfs_alloc_request req;
   60         struct nandfs_device *nandfsdev;
   61         struct nandfs_mdt *mdt;
   62         struct nandfs_node *ifile;
   63         struct nandfs_inode *inode;
   64         struct vnode *vp;
   65         uint32_t entry;
   66         int error = 0;
   67 
   68         nandfsdev = nmp->nm_nandfsdev;
   69         mdt = &nandfsdev->nd_ifile_mdt;
   70         ifile = nmp->nm_ifile_node;
   71         vp = NTOV(ifile);
   72 
   73         VOP_LOCK(vp, LK_EXCLUSIVE);
   74         /* Allocate new inode in ifile */
   75         req.entrynum = nandfsdev->nd_last_ino + 1;
   76         error = nandfs_find_free_entry(mdt, ifile, &req);
   77         if (error) {
   78                 VOP_UNLOCK(vp, 0);
   79                 return (error);
   80         }
   81 
   82         error = nandfs_get_entry_block(mdt, ifile, &req, &entry, 1);
   83         if (error) {
   84                 VOP_UNLOCK(vp, 0);
   85                 return (error);
   86         }
   87 
   88         /* Inode initialization */
   89         inode = ((struct nandfs_inode *) req.bp_entry->b_data) + entry;
   90         nandfs_inode_init(inode, mode);
   91 
   92         error = nandfs_alloc_entry(mdt, &req);
   93         if (error) {
   94                 VOP_UNLOCK(vp, 0);
   95                 return (error);
   96         }
   97 
   98         VOP_UNLOCK(vp, 0);
   99 
  100         nandfsdev->nd_last_ino = req.entrynum;
  101         error = nandfs_get_node(nmp, req.entrynum, node);
  102         DPRINTF(IFILE, ("%s: node: %p ino: %#jx\n",
  103             __func__, node, (uintmax_t)((*node)->nn_ino)));
  104 
  105         return (error);
  106 }
  107 
  108 int
  109 nandfs_node_destroy(struct nandfs_node *node)
  110 {
  111         struct nandfs_alloc_request req;
  112         struct nandfsmount *nmp;
  113         struct nandfs_mdt *mdt;
  114         struct nandfs_node *ifile;
  115         struct vnode *vp;
  116         int error = 0;
  117 
  118         nmp = node->nn_nmp;
  119         req.entrynum = node->nn_ino;
  120         mdt = &nmp->nm_nandfsdev->nd_ifile_mdt;
  121         ifile = nmp->nm_ifile_node;
  122         vp = NTOV(ifile);
  123 
  124         DPRINTF(IFILE, ("%s: destroy node: %p ino: %#jx\n",
  125             __func__, node, (uintmax_t)node->nn_ino));
  126         VOP_LOCK(vp, LK_EXCLUSIVE);
  127 
  128         error = nandfs_find_entry(mdt, ifile, &req);
  129         if (error) {
  130                 nandfs_error("%s: finding entry error:%d node %p(%jx)",
  131                     __func__, error, node, node->nn_ino);
  132                 VOP_UNLOCK(vp, 0);
  133                 return (error);
  134         }
  135 
  136         nandfs_inode_destroy(&node->nn_inode);
  137 
  138         error = nandfs_free_entry(mdt, &req);
  139         if (error) {
  140                 nandfs_error("%s: freing entry error:%d node %p(%jx)",
  141                     __func__, error, node, node->nn_ino);
  142                 VOP_UNLOCK(vp, 0);
  143                 return (error);
  144         }
  145 
  146         VOP_UNLOCK(vp, 0);
  147         DPRINTF(IFILE, ("%s: freed node %p ino %#jx\n",
  148             __func__, node, (uintmax_t)node->nn_ino));
  149         return (error);
  150 }
  151 
  152 int
  153 nandfs_node_update(struct nandfs_node *node)
  154 {
  155         struct nandfs_alloc_request req;
  156         struct nandfsmount *nmp;
  157         struct nandfs_mdt *mdt;
  158         struct nandfs_node *ifile;
  159         struct nandfs_inode *inode;
  160         uint32_t index;
  161         int error = 0;
  162 
  163         nmp = node->nn_nmp;
  164         ifile = nmp->nm_ifile_node;
  165         ASSERT_VOP_LOCKED(NTOV(ifile), __func__);
  166 
  167         req.entrynum = node->nn_ino;
  168         mdt = &nmp->nm_nandfsdev->nd_ifile_mdt;
  169 
  170         DPRINTF(IFILE, ("%s: node:%p ino:%#jx\n",
  171             __func__, &node->nn_inode, (uintmax_t)node->nn_ino));
  172 
  173         error = nandfs_get_entry_block(mdt, ifile, &req, &index, 0);
  174         if (error) {
  175                 printf("nandfs_get_entry_block returned with ERROR=%d\n",
  176                     error);
  177                 return (error);
  178         }
  179 
  180         inode = ((struct nandfs_inode *) req.bp_entry->b_data) + index;
  181         memcpy(inode, &node->nn_inode, sizeof(*inode));
  182         error = nandfs_dirty_buf(req.bp_entry, 0);
  183 
  184         return (error);
  185 }
  186 
  187 int
  188 nandfs_get_node_entry(struct nandfsmount *nmp, struct nandfs_inode **inode,
  189     uint64_t ino, struct buf **bp)
  190 {
  191         struct nandfs_alloc_request req;
  192         struct nandfs_mdt *mdt;
  193         struct nandfs_node *ifile;
  194         struct vnode *vp;
  195         uint32_t index;
  196         int error = 0;
  197 
  198         req.entrynum = ino;
  199         mdt = &nmp->nm_nandfsdev->nd_ifile_mdt;
  200         ifile = nmp->nm_ifile_node;
  201         vp = NTOV(ifile);
  202 
  203         VOP_LOCK(vp, LK_EXCLUSIVE);
  204         error = nandfs_get_entry_block(mdt, ifile, &req, &index, 0);
  205         if (error) {
  206                 VOP_UNLOCK(vp, 0);
  207                 return (error);
  208         }
  209 
  210         *inode = ((struct nandfs_inode *) req.bp_entry->b_data) + index;
  211         *bp = req.bp_entry;
  212         VOP_UNLOCK(vp, 0);
  213         return (0);
  214 }
  215

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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