lfs_alloc.c revision 1.9
1 /* $NetBSD: lfs_alloc.c,v 1.9 1997/07/04 20:22:17 drochner Exp $ */ 2 3 /* 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)lfs_alloc.c 8.4 (Berkeley) 1/4/94 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/buf.h> 42 #include <sys/vnode.h> 43 #include <sys/syslog.h> 44 #include <sys/mount.h> 45 #include <sys/malloc.h> 46 47 #include <vm/vm.h> 48 49 #include <ufs/ufs/quota.h> 50 #include <ufs/ufs/inode.h> 51 #include <ufs/ufs/ufsmount.h> 52 #include <ufs/ufs/ufs_extern.h> 53 54 #include <ufs/lfs/lfs.h> 55 #include <ufs/lfs/lfs_extern.h> 56 57 /* Allocate a new inode. */ 58 /* ARGSUSED */ 59 int 60 lfs_valloc(v) 61 void *v; 62 { 63 struct vop_valloc_args /* { 64 struct vnode *a_pvp; 65 int a_mode; 66 struct ucred *a_cred; 67 struct vnode **a_vpp; 68 } */ *ap = v; 69 struct lfs *fs; 70 struct buf *bp; 71 struct ifile *ifp; 72 struct inode *ip; 73 struct vnode *vp; 74 daddr_t blkno; 75 ino_t new_ino; 76 u_long i, max; 77 int error; 78 79 /* Get the head of the freelist. */ 80 fs = VTOI(ap->a_pvp)->i_lfs; 81 new_ino = fs->lfs_free; 82 #ifdef ALLOCPRINT 83 printf("lfs_ialloc: allocate inode %d\n", new_ino); 84 #endif 85 86 /* 87 * Remove the inode from the free list and write the new start 88 * of the free list into the superblock. 89 */ 90 LFS_IENTRY(ifp, fs, new_ino, bp); 91 if (ifp->if_daddr != LFS_UNUSED_DADDR) 92 panic("lfs_ialloc: inuse inode on the free list"); 93 fs->lfs_free = ifp->if_nextfree; 94 brelse(bp); 95 96 /* Extend IFILE so that the next lfs_valloc will succeed. */ 97 if (fs->lfs_free == LFS_UNUSED_INUM) { 98 vp = fs->lfs_ivnode; 99 ip = VTOI(vp); 100 blkno = lblkno(fs, ip->i_ffs_size); 101 lfs_balloc(vp, fs->lfs_bsize, blkno, &bp); 102 ip->i_ffs_size += fs->lfs_bsize; 103 vnode_pager_setsize(vp, ip->i_ffs_size); 104 vnode_pager_uncache(vp); 105 106 i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) * 107 fs->lfs_ifpb; 108 fs->lfs_free = i; 109 max = i + fs->lfs_ifpb; 110 for (ifp = (struct ifile *)bp->b_data; i < max; ++ifp) { 111 ifp->if_version = 1; 112 ifp->if_daddr = LFS_UNUSED_DADDR; 113 ifp->if_nextfree = ++i; 114 } 115 ifp--; 116 ifp->if_nextfree = LFS_UNUSED_INUM; 117 if ((error = VOP_BWRITE(bp)) != 0) 118 return (error); 119 } 120 121 /* Create a vnode to associate with the inode. */ 122 if ((error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp)) != 0) 123 return (error); 124 125 126 ip = VTOI(vp); 127 /* Zero out the direct and indirect block addresses. */ 128 bzero(&ip->i_din.ffs_din, sizeof(struct dinode)); 129 ip->i_din.ffs_din.di_inumber = new_ino; 130 131 /* Set a new generation number for this inode. */ 132 ip->i_ffs_gen++; 133 134 /* Insert into the inode hash table. */ 135 ufs_ihashins(ip); 136 137 error = ufs_vinit(vp->v_mount, lfs_specop_p, LFS_FIFOOPS, &vp); 138 if (error) { 139 vput(vp); 140 *ap->a_vpp = NULL; 141 return (error); 142 } 143 144 *ap->a_vpp = vp; 145 vp->v_flag |= VDIROP; 146 VREF(ip->i_devvp); 147 148 /* Set superblock modified bit and increment file count. */ 149 fs->lfs_fmod = 1; 150 ++fs->lfs_nfiles; 151 return (0); 152 } 153 154 /* Create a new vnode/inode pair and initialize what fields we can. */ 155 int 156 lfs_vcreate(mp, ino, vpp) 157 struct mount *mp; 158 ino_t ino; 159 struct vnode **vpp; 160 { 161 extern int (**lfs_vnodeop_p) __P((void *)); 162 struct inode *ip; 163 struct ufsmount *ump; 164 int error; 165 #ifdef QUOTA 166 int i; 167 #endif 168 169 /* Create the vnode. */ 170 if ((error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) != 0) { 171 *vpp = NULL; 172 return (error); 173 } 174 175 /* Get a pointer to the private mount structure. */ 176 ump = VFSTOUFS(mp); 177 178 /* Initialize the inode. */ 179 MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK); 180 (*vpp)->v_data = ip; 181 ip->i_vnode = *vpp; 182 ip->i_devvp = ump->um_devvp; 183 ip->i_flag = IN_MODIFIED; 184 ip->i_dev = ump->um_dev; 185 ip->i_number = ip->i_din.ffs_din.di_inumber = ino; 186 ip->i_din.ffs_din.di_spare[0] = 0xdeadbeef; 187 ip->i_din.ffs_din.di_spare[1] = 0xdeadbeef; 188 ip->i_lfs = ump->um_lfs; 189 #ifdef QUOTA 190 for (i = 0; i < MAXQUOTAS; i++) 191 ip->i_dquot[i] = NODQUOT; 192 #endif 193 ip->i_lockf = 0; 194 ip->i_diroff = 0; 195 ip->i_ffs_mode = 0; 196 ip->i_ffs_size = 0; 197 ip->i_ffs_blocks = 0; 198 ++ump->um_lfs->lfs_uinodes; 199 return (0); 200 } 201 202 /* Free an inode. */ 203 /* ARGUSED */ 204 int 205 lfs_vfree(v) 206 void *v; 207 { 208 struct vop_vfree_args /* { 209 struct vnode *a_pvp; 210 ino_t a_ino; 211 int a_mode; 212 } */ *ap = v; 213 SEGUSE *sup; 214 struct buf *bp; 215 struct ifile *ifp; 216 struct inode *ip; 217 struct lfs *fs; 218 daddr_t old_iaddr; 219 ino_t ino; 220 221 /* Get the inode number and file system. */ 222 ip = VTOI(ap->a_pvp); 223 fs = ip->i_lfs; 224 ino = ip->i_number; 225 if (ip->i_flag & IN_MODIFIED) { 226 --fs->lfs_uinodes; 227 ip->i_flag &= 228 ~(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE); 229 } 230 /* 231 * Set the ifile's inode entry to unused, increment its version number 232 * and link it into the free chain. 233 */ 234 LFS_IENTRY(ifp, fs, ino, bp); 235 old_iaddr = ifp->if_daddr; 236 ifp->if_daddr = LFS_UNUSED_DADDR; 237 ++ifp->if_version; 238 ifp->if_nextfree = fs->lfs_free; 239 fs->lfs_free = ino; 240 (void) VOP_BWRITE(bp); 241 242 if (old_iaddr != LFS_UNUSED_DADDR) { 243 LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp); 244 #ifdef DIAGNOSTIC 245 if (sup->su_nbytes < sizeof(struct dinode)) 246 panic("lfs_vfree: negative byte count (segment %d)\n", 247 datosn(fs, old_iaddr)); 248 #endif 249 sup->su_nbytes -= sizeof(struct dinode); 250 (void) VOP_BWRITE(bp); 251 } 252 253 /* Set superblock modified bit and decrement file count. */ 254 fs->lfs_fmod = 1; 255 --fs->lfs_nfiles; 256 return (0); 257 } 258
Indexes created Tue Sep 23 02:09:52 GMT 2025