1 /* 2 * Copyright (c) 1991 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)lfs_alloc.c 7.53 (Berkeley) 08/25/92 8 */ 9 10 #include <sys/param.h> 11 #include <sys/kernel.h> 12 #include <sys/buf.h> 13 #include <sys/vnode.h> 14 #include <sys/syslog.h> 15 #include <sys/mount.h> 16 #include <sys/malloc.h> 17 18 #include <vm/vm.h> 19 20 #include <ufs/ufs/quota.h> 21 #include <ufs/ufs/inode.h> 22 #include <ufs/ufs/ufsmount.h> 23 24 #include <ufs/lfs/lfs.h> 25 #include <ufs/lfs/lfs_extern.h> 26 27 extern u_long nextgennumber; 28 29 /* Allocate a new inode. */ 30 /* ARGSUSED */ 31 int 32 lfs_valloc(ap) 33 struct vop_valloc_args /* { 34 struct vnode *a_pvp; 35 int a_mode; 36 struct ucred *a_cred; 37 struct vnode **a_vpp; 38 } */ *ap; 39 { 40 struct lfs *fs; 41 struct buf *bp; 42 struct ifile *ifp; 43 struct inode *ip; 44 struct vnode *vp; 45 daddr_t blkno; 46 ino_t new_ino; 47 u_long i, max; 48 int error; 49 50 /* Get the head of the freelist. */ 51 fs = VTOI(ap->a_pvp)->i_lfs; 52 new_ino = fs->lfs_free; 53 #ifdef ALLOCPRINT 54 printf("lfs_ialloc: allocate inode %d\n", new_ino); 55 #endif 56 57 /* 58 * Remove the inode from the free list and write the new start 59 * of the free list into the superblock. 60 */ 61 LFS_IENTRY(ifp, fs, new_ino, bp); 62 if (ifp->if_daddr != LFS_UNUSED_DADDR) 63 panic("lfs_ialloc: inuse inode on the free list"); 64 fs->lfs_free = ifp->if_nextfree; 65 brelse(bp); 66 67 /* Extend IFILE so that the next lfs_valloc will succeed. */ 68 if (fs->lfs_free == LFS_UNUSED_INUM) { 69 vp = fs->lfs_ivnode; 70 ip = VTOI(vp); 71 blkno = lblkno(fs, ip->i_size); 72 bp = getblk(vp, blkno, fs->lfs_bsize); 73 i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) * 74 fs->lfs_ifpb; 75 fs->lfs_free = i; 76 max = i + fs->lfs_ifpb; 77 for (ifp = (struct ifile *)bp->b_un.b_words; i < max; ++ifp) { 78 ifp->if_version = 1; 79 ifp->if_daddr = LFS_UNUSED_DADDR; 80 ifp->if_nextfree = ++i; 81 } 82 ifp--; 83 ifp->if_nextfree = LFS_UNUSED_INUM; 84 85 ip->i_blocks += btodb(fs->lfs_bsize); 86 fs->lfs_bfree -= btodb(fs->lfs_bsize); 87 ip->i_size += fs->lfs_bsize; 88 vnode_pager_setsize(vp, (u_long)ip->i_size); 89 vnode_pager_uncache(vp); 90 if (error = VOP_BWRITE(bp)) 91 return (error); 92 } 93 94 /* Create a vnode to associate with the inode. */ 95 if (error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp)) 96 return (error); 97 *ap->a_vpp = vp; 98 vp->v_flag |= VDIROP; 99 ip = VTOI(vp); 100 VREF(ip->i_devvp); 101 102 /* Zero out the direct and indirect block addresses. */ 103 bzero(ip->i_db, (NDADDR + NIADDR) * sizeof(daddr_t)); 104 105 /* Set a new generation number for this inode. */ 106 if (++nextgennumber < (u_long)time.tv_sec) 107 nextgennumber = time.tv_sec; 108 ip->i_gen = nextgennumber; 109 110 /* Insert into the inode hash table. */ 111 ufs_ihashins(ip); 112 113 /* Set superblock modified bit and increment file count. */ 114 fs->lfs_fmod = 1; 115 ++fs->lfs_nfiles; 116 return (0); 117 } 118 119 /* Create a new vnode/inode pair and initialize what fields we can. */ 120 int 121 lfs_vcreate(mp, ino, vpp) 122 struct mount *mp; 123 ino_t ino; 124 struct vnode **vpp; 125 { 126 extern int (**lfs_vnodeop_p)(); 127 struct inode *ip; 128 struct ufsmount *ump; 129 int error, i; 130 131 /* Create the vnode. */ 132 if (error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) { 133 *vpp = NULL; 134 return (error); 135 } 136 137 /* Get a pointer to the private mount structure. */ 138 ump = VFSTOUFS(mp); 139 140 /* Initialize the inode. */ 141 MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK); 142 (*vpp)->v_data = ip; 143 ip->i_vnode = *vpp; 144 ip->i_devvp = ump->um_devvp; 145 ip->i_flag = IMOD; 146 ip->i_dev = ump->um_dev; 147 ip->i_number = ip->i_din.di_inum = ino; 148 ip->i_lfs = ump->um_lfs; 149 #ifdef QUOTA 150 for (i = 0; i < MAXQUOTAS; i++) 151 ip->i_dquot[i] = NODQUOT; 152 #endif 153 ip->i_lockf = 0; 154 ip->i_diroff = 0; 155 ip->i_mode = 0; 156 ip->i_size = 0; 157 ip->i_blocks = 0; 158 ++ump->um_lfs->lfs_uinodes; 159 return (0); 160 } 161 162 /* Free an inode. */ 163 /* ARGUSED */ 164 int 165 lfs_vfree(ap) 166 struct vop_vfree_args /* { 167 struct vnode *a_pvp; 168 ino_t a_ino; 169 int a_mode; 170 } */ *ap; 171 { 172 SEGUSE *sup; 173 struct buf *bp; 174 struct ifile *ifp; 175 struct inode *ip; 176 struct lfs *fs; 177 daddr_t old_iaddr; 178 ino_t ino; 179 int error; 180 181 /* Get the inode number and file system. */ 182 ip = VTOI(ap->a_pvp); 183 fs = ip->i_lfs; 184 ino = ip->i_number; 185 if (ip->i_flag & IMOD) { 186 --fs->lfs_uinodes; 187 ip->i_flag &= ~(IMOD | IACC | IUPD | ICHG); 188 } 189 /* 190 * Set the ifile's inode entry to unused, increment its version number 191 * and link it into the free chain. 192 */ 193 LFS_IENTRY(ifp, fs, ino, bp); 194 old_iaddr = ifp->if_daddr; 195 ifp->if_daddr = LFS_UNUSED_DADDR; 196 ++ifp->if_version; 197 ifp->if_nextfree = fs->lfs_free; 198 fs->lfs_free = ino; 199 (void) VOP_BWRITE(bp); 200 201 if (old_iaddr != LFS_UNUSED_DADDR) { 202 LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp); 203 #ifdef DIAGNOSTIC 204 if (sup->su_nbytes < sizeof(struct dinode)) 205 panic("lfs_vfree: negative byte count (segment %d)\n", 206 datosn(fs, old_iaddr)); 207 #endif 208 sup->su_nbytes -= sizeof(struct dinode); 209 (void) VOP_BWRITE(bp); 210 } 211 212 /* Set superblock modified bit and decrement file count. */ 213 fs->lfs_fmod = 1; 214 --fs->lfs_nfiles; 215 return (0); 216 } 217