1 /* 2 * Copyright (c) 1991, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)lfs_alloc.c 8.7 (Berkeley) 05/14/95 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 #include <ufs/ufs/ufs_extern.h> 24 25 #include <ufs/lfs/lfs.h> 26 #include <ufs/lfs/lfs_extern.h> 27 28 extern u_long nextgennumber; 29 30 /* Allocate a new inode. */ 31 /* ARGSUSED */ 32 int 33 lfs_valloc(ap) 34 struct vop_valloc_args /* { 35 struct vnode *a_pvp; 36 int a_mode; 37 struct ucred *a_cred; 38 struct vnode **a_vpp; 39 } */ *ap; 40 { 41 struct lfs *fs; 42 struct buf *bp; 43 struct ifile *ifp; 44 struct inode *ip; 45 struct vnode *vp; 46 ufs_daddr_t blkno; 47 ino_t new_ino; 48 u_long i, max; 49 int error; 50 51 /* Get the head of the freelist. */ 52 fs = VTOI(ap->a_pvp)->i_lfs; 53 new_ino = fs->lfs_free; 54 #ifdef ALLOCPRINT 55 printf("lfs_ialloc: allocate inode %d\n", new_ino); 56 #endif 57 58 /* 59 * Remove the inode from the free list and write the new start 60 * of the free list into the superblock. 61 */ 62 LFS_IENTRY(ifp, fs, new_ino, bp); 63 if (ifp->if_daddr != LFS_UNUSED_DADDR) 64 panic("lfs_ialloc: inuse inode on the free list"); 65 fs->lfs_free = ifp->if_nextfree; 66 brelse(bp); 67 68 /* Extend IFILE so that the next lfs_valloc will succeed. */ 69 if (fs->lfs_free == LFS_UNUSED_INUM) { 70 vp = fs->lfs_ivnode; 71 ip = VTOI(vp); 72 blkno = lblkno(fs, ip->i_size); 73 lfs_balloc(vp, 0, fs->lfs_bsize, blkno, &bp); 74 ip->i_size += fs->lfs_bsize; 75 vnode_pager_setsize(vp, (u_long)ip->i_size); 76 vnode_pager_uncache(vp); 77 78 i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) * 79 fs->lfs_ifpb; 80 fs->lfs_free = i; 81 max = i + fs->lfs_ifpb; 82 for (ifp = (struct ifile *)bp->b_data; i < max; ++ifp) { 83 ifp->if_version = 1; 84 ifp->if_daddr = LFS_UNUSED_DADDR; 85 ifp->if_nextfree = ++i; 86 } 87 ifp--; 88 ifp->if_nextfree = LFS_UNUSED_INUM; 89 if (error = VOP_BWRITE(bp)) 90 return (error); 91 } 92 93 /* Create a vnode to associate with the inode. */ 94 if (error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp)) 95 return (error); 96 97 98 ip = VTOI(vp); 99 /* Zero out the direct and indirect block addresses. */ 100 bzero(&ip->i_din, sizeof(struct dinode)); 101 ip->i_din.di_inumber = new_ino; 102 103 /* Set a new generation number for this inode. */ 104 if (++nextgennumber < (u_long)time.tv_sec) 105 nextgennumber = time.tv_sec; 106 ip->i_gen = nextgennumber; 107 108 /* Insert into the inode hash table. */ 109 ufs_ihashins(ip); 110 111 if (error = ufs_vinit(vp->v_mount, lfs_specop_p, LFS_FIFOOPS, &vp)) { 112 vput(vp); 113 *ap->a_vpp = NULL; 114 return (error); 115 } 116 117 *ap->a_vpp = vp; 118 vp->v_flag |= VDIROP; 119 VREF(ip->i_devvp); 120 121 /* Set superblock modified bit and increment file count. */ 122 fs->lfs_fmod = 1; 123 ++fs->lfs_nfiles; 124 return (0); 125 } 126 127 /* Create a new vnode/inode pair and initialize what fields we can. */ 128 int 129 lfs_vcreate(mp, ino, vpp) 130 struct mount *mp; 131 ino_t ino; 132 struct vnode **vpp; 133 { 134 extern int (**lfs_vnodeop_p)(); 135 struct inode *ip; 136 struct ufsmount *ump; 137 int error, i; 138 139 /* Create the vnode. */ 140 if (error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) { 141 *vpp = NULL; 142 return (error); 143 } 144 145 /* Get a pointer to the private mount structure. */ 146 ump = VFSTOUFS(mp); 147 148 /* Initialize the inode. */ 149 MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK); 150 lockinit(&ip->i_lock, PINOD, "lfsinode", 0, 0); 151 (*vpp)->v_data = ip; 152 ip->i_vnode = *vpp; 153 ip->i_devvp = ump->um_devvp; 154 ip->i_flag = IN_MODIFIED; 155 ip->i_dev = ump->um_dev; 156 ip->i_number = ip->i_din.di_inumber = ino; 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 ufs_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