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 7.52 (Berkeley) 08/21/92 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 if (!bp) { 74 uprintf("\n%s: no inodes left\n", fs->lfs_fsmnt); 75 log(LOG_ERR, "uid %d on %s: out of inodes\n", 76 ap->a_cred->cr_uid, fs->lfs_fsmnt); 77 return (ENOSPC); 78 } 79 i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) * 80 fs->lfs_ifpb; 81 fs->lfs_free = i; 82 max = i + fs->lfs_ifpb; 83 for (ifp = (struct ifile *)bp->b_un.b_words; i < max; ++ifp) { 84 ifp->if_version = 1; 85 ifp->if_daddr = LFS_UNUSED_DADDR; 86 ifp->if_nextfree = ++i; 87 } 88 ifp--; 89 ifp->if_nextfree = LFS_UNUSED_INUM; 90 91 ip->i_blocks += btodb(fs->lfs_bsize); 92 fs->lfs_bfree -= btodb(fs->lfs_bsize); 93 ip->i_size += fs->lfs_bsize; 94 vnode_pager_setsize(vp, (u_long)ip->i_size); 95 vnode_pager_uncache(vp); 96 if (error = VOP_BWRITE(bp)) 97 return (error); 98 } 99 100 /* Create a vnode to associate with the inode. */ 101 if (error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp)) 102 return (error); 103 *ap->a_vpp = vp; 104 vp->v_flag |= VDIROP; 105 ip = VTOI(vp); 106 VREF(ip->i_devvp); 107 108 /* Zero out the direct and indirect block addresses. */ 109 bzero(ip->i_db, (NDADDR + NIADDR) * sizeof(daddr_t)); 110 111 /* Set a new generation number for this inode. */ 112 if (++nextgennumber < (u_long)time.tv_sec) 113 nextgennumber = time.tv_sec; 114 ip->i_gen = nextgennumber; 115 116 /* Insert into the inode hash table. */ 117 ufs_ihashins(ip); 118 119 /* Set superblock modified bit and increment file count. */ 120 fs->lfs_fmod = 1; 121 ++fs->lfs_nfiles; 122 return (0); 123 } 124 125 /* Create a new vnode/inode pair and initialize what fields we can. */ 126 int 127 lfs_vcreate(mp, ino, vpp) 128 struct mount *mp; 129 ino_t ino; 130 struct vnode **vpp; 131 { 132 extern int (**lfs_vnodeop_p)(); 133 struct inode *ip; 134 struct ufsmount *ump; 135 int error, i; 136 137 /* Create the vnode. */ 138 if (error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) { 139 *vpp = NULL; 140 return (error); 141 } 142 143 /* Get a pointer to the private mount structure. */ 144 ump = VFSTOUFS(mp); 145 146 /* Initialize the inode. */ 147 MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK); 148 (*vpp)->v_data = ip; 149 ip->i_vnode = *vpp; 150 ip->i_devvp = ump->um_devvp; 151 ip->i_flag = IMOD; 152 ip->i_dev = ump->um_dev; 153 ip->i_number = ip->i_din.di_inum = ino; 154 ip->i_lfs = ump->um_lfs; 155 #ifdef QUOTA 156 for (i = 0; i < MAXQUOTAS; i++) 157 ip->i_dquot[i] = NODQUOT; 158 #endif 159 ip->i_lockf = 0; 160 ip->i_diroff = 0; 161 ip->i_mode = 0; 162 ip->i_size = 0; 163 ip->i_blocks = 0; 164 ++ump->um_lfs->lfs_uinodes; 165 return (0); 166 } 167 168 /* Free an inode. */ 169 /* ARGUSED */ 170 int 171 lfs_vfree(ap) 172 struct vop_vfree_args /* { 173 struct vnode *a_pvp; 174 ino_t a_ino; 175 int a_mode; 176 } */ *ap; 177 { 178 SEGUSE *sup; 179 struct buf *bp; 180 struct ifile *ifp; 181 struct inode *ip; 182 struct lfs *fs; 183 daddr_t old_iaddr; 184 ino_t ino; 185 int error; 186 187 /* Get the inode number and file system. */ 188 ip = VTOI(ap->a_pvp); 189 fs = ip->i_lfs; 190 ino = ip->i_number; 191 if (ip->i_flag & IMOD) { 192 --fs->lfs_uinodes; 193 ip->i_flag &= ~(IMOD | IACC | IUPD | ICHG); 194 } 195 /* 196 * Set the ifile's inode entry to unused, increment its version number 197 * and link it into the free chain. 198 */ 199 LFS_IENTRY(ifp, fs, ino, bp); 200 old_iaddr = ifp->if_daddr; 201 ifp->if_daddr = LFS_UNUSED_DADDR; 202 ++ifp->if_version; 203 ifp->if_nextfree = fs->lfs_free; 204 fs->lfs_free = ino; 205 (void) VOP_BWRITE(bp); 206 207 if (old_iaddr != LFS_UNUSED_DADDR) { 208 LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp); 209 #ifdef DIAGNOSTIC 210 if (sup->su_nbytes < sizeof(struct dinode)) 211 panic("lfs_vfree: negative byte count (segment %d)\n", 212 datosn(fs, old_iaddr)); 213 #endif 214 sup->su_nbytes -= sizeof(struct dinode); 215 (void) VOP_BWRITE(bp); 216 } 217 218 /* Set superblock modified bit and decrement file count. */ 219 fs->lfs_fmod = 1; 220 --fs->lfs_nfiles; 221 return (0); 222 } 223