1 /* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)lfs_alloc.c 8.4 (Berkeley) 01/04/94 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 lfs_balloc(vp, fs->lfs_bsize, blkno, &bp); 73 ip->i_size += fs->lfs_bsize; 74 vnode_pager_setsize(vp, (u_long)ip->i_size); 75 vnode_pager_uncache(vp); 76 77 i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) * 78 fs->lfs_ifpb; 79 fs->lfs_free = i; 80 max = i + fs->lfs_ifpb; 81 for (ifp = (struct ifile *)bp->b_data; i < max; ++ifp) { 82 ifp->if_version = 1; 83 ifp->if_daddr = LFS_UNUSED_DADDR; 84 ifp->if_nextfree = ++i; 85 } 86 ifp--; 87 ifp->if_nextfree = LFS_UNUSED_INUM; 88 if (error = VOP_BWRITE(bp)) 89 return (error); 90 } 91 92 /* Create a vnode to associate with the inode. */ 93 if (error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp)) 94 return (error); 95 96 97 ip = VTOI(vp); 98 /* Zero out the direct and indirect block addresses. */ 99 bzero(&ip->i_din, sizeof(struct dinode)); 100 ip->i_din.di_inumber = new_ino; 101 102 /* Set a new generation number for this inode. */ 103 if (++nextgennumber < (u_long)time.tv_sec) 104 nextgennumber = time.tv_sec; 105 ip->i_gen = nextgennumber; 106 107 /* Insert into the inode hash table. */ 108 ufs_ihashins(ip); 109 110 if (error = ufs_vinit(vp->v_mount, lfs_specop_p, LFS_FIFOOPS, &vp)) { 111 vput(vp); 112 *ap->a_vpp = NULL; 113 return (error); 114 } 115 116 *ap->a_vpp = vp; 117 vp->v_flag |= VDIROP; 118 VREF(ip->i_devvp); 119 120 /* Set superblock modified bit and increment file count. */ 121 fs->lfs_fmod = 1; 122 ++fs->lfs_nfiles; 123 return (0); 124 } 125 126 /* Create a new vnode/inode pair and initialize what fields we can. */ 127 int 128 lfs_vcreate(mp, ino, vpp) 129 struct mount *mp; 130 ino_t ino; 131 struct vnode **vpp; 132 { 133 extern int (**lfs_vnodeop_p)(); 134 struct inode *ip; 135 struct ufsmount *ump; 136 int error, i; 137 138 /* Create the vnode. */ 139 if (error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) { 140 *vpp = NULL; 141 return (error); 142 } 143 144 /* Get a pointer to the private mount structure. */ 145 ump = VFSTOUFS(mp); 146 147 /* Initialize the inode. */ 148 MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK); 149 (*vpp)->v_data = ip; 150 ip->i_vnode = *vpp; 151 ip->i_devvp = ump->um_devvp; 152 ip->i_flag = IN_MODIFIED; 153 ip->i_dev = ump->um_dev; 154 ip->i_number = ip->i_din.di_inumber = ino; 155 ip->i_din.di_spare[0] = 0xdeadbeef; 156 ip->i_din.di_spare[1] = 0xdeadbeef; 157 ip->i_lfs = ump->um_lfs; 158 #ifdef QUOTA 159 for (i = 0; i < MAXQUOTAS; i++) 160 ip->i_dquot[i] = NODQUOT; 161 #endif 162 ip->i_lockf = 0; 163 ip->i_diroff = 0; 164 ip->i_mode = 0; 165 ip->i_size = 0; 166 ip->i_blocks = 0; 167 ++ump->um_lfs->lfs_uinodes; 168 return (0); 169 } 170 171 /* Free an inode. */ 172 /* ARGUSED */ 173 int 174 lfs_vfree(ap) 175 struct vop_vfree_args /* { 176 struct vnode *a_pvp; 177 ino_t a_ino; 178 int a_mode; 179 } */ *ap; 180 { 181 SEGUSE *sup; 182 struct buf *bp; 183 struct ifile *ifp; 184 struct inode *ip; 185 struct lfs *fs; 186 daddr_t old_iaddr; 187 ino_t ino; 188 189 /* Get the inode number and file system. */ 190 ip = VTOI(ap->a_pvp); 191 fs = ip->i_lfs; 192 ino = ip->i_number; 193 if (ip->i_flag & IN_MODIFIED) { 194 --fs->lfs_uinodes; 195 ip->i_flag &= 196 ~(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE); 197 } 198 /* 199 * Set the ifile's inode entry to unused, increment its version number 200 * and link it into the free chain. 201 */ 202 LFS_IENTRY(ifp, fs, ino, bp); 203 old_iaddr = ifp->if_daddr; 204 ifp->if_daddr = LFS_UNUSED_DADDR; 205 ++ifp->if_version; 206 ifp->if_nextfree = fs->lfs_free; 207 fs->lfs_free = ino; 208 (void) VOP_BWRITE(bp); 209 210 if (old_iaddr != LFS_UNUSED_DADDR) { 211 LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp); 212 #ifdef DIAGNOSTIC 213 if (sup->su_nbytes < sizeof(struct dinode)) 214 panic("lfs_vfree: negative byte count (segment %d)\n", 215 datosn(fs, old_iaddr)); 216 #endif 217 sup->su_nbytes -= sizeof(struct dinode); 218 (void) VOP_BWRITE(bp); 219 } 220 221 /* Set superblock modified bit and decrement file count. */ 222 fs->lfs_fmod = 1; 223 --fs->lfs_nfiles; 224 return (0); 225 } 226