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 7.51 (Berkeley) 08/01/92 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 LFS_UBWRITE(bp); 97 } 98 99 /* Create a vnode to associate with the inode. */ 100 if (error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp)) 101 return (error); 102 *ap->a_vpp = vp; 103 vp->v_flag |= VDIROP; 104 ip = VTOI(vp); 105 VREF(ip->i_devvp); 106 107 /* Zero out the direct and indirect block addresses. */ 108 bzero(ip->i_db, (NDADDR + NIADDR) * sizeof(daddr_t)); 109 110 /* Set a new generation number for this inode. */ 111 if (++nextgennumber < (u_long)time.tv_sec) 112 nextgennumber = time.tv_sec; 113 ip->i_gen = nextgennumber; 114 115 /* Insert into the inode hash table. */ 116 ufs_ihashins(ip); 117 118 /* Set superblock modified bit and increment file count. */ 119 fs->lfs_fmod = 1; 120 ++fs->lfs_nfiles; 121 return (0); 122 } 123 124 /* Create a new vnode/inode pair and initialize what fields we can. */ 125 int 126 lfs_vcreate(mp, ino, vpp) 127 struct mount *mp; 128 ino_t ino; 129 struct vnode **vpp; 130 { 131 extern int (**lfs_vnodeop_p)(); 132 struct inode *ip; 133 struct ufsmount *ump; 134 int error, i; 135 136 /* Create the vnode. */ 137 if (error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) { 138 *vpp = NULL; 139 return (error); 140 } 141 142 /* Get a pointer to the private mount structure. */ 143 ump = VFSTOUFS(mp); 144 145 /* Initialize the inode. */ 146 MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK); 147 (*vpp)->v_data = ip; 148 ip->i_vnode = *vpp; 149 ip->i_devvp = ump->um_devvp; 150 ip->i_flag = 0; 151 ip->i_dev = ump->um_dev; 152 ip->i_number = ip->i_din.di_inum = ino; 153 ip->i_lfs = ump->um_lfs; 154 #ifdef QUOTA 155 for (i = 0; i < MAXQUOTAS; i++) 156 ip->i_dquot[i] = NODQUOT; 157 #endif 158 ip->i_lockf = 0; 159 ip->i_diroff = 0; 160 ip->i_mode = 0; 161 ip->i_size = 0; 162 ip->i_blocks = 0; 163 return (0); 164 } 165 166 /* Free an inode. */ 167 /* ARGUSED */ 168 int 169 lfs_vfree(ap) 170 struct vop_vfree_args /* { 171 struct vnode *a_pvp; 172 ino_t a_ino; 173 int a_mode; 174 } */ *ap; 175 { 176 SEGUSE *sup; 177 struct buf *bp; 178 struct ifile *ifp; 179 struct inode *ip; 180 struct lfs *fs; 181 daddr_t old_iaddr; 182 ino_t ino; 183 184 /* Get the inode number and file system. */ 185 ip = VTOI(ap->a_pvp); 186 fs = ip->i_lfs; 187 ino = ip->i_number; 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 LFS_UBWRITE(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 LFS_UBWRITE(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