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 7.49 (Berkeley) 07/23/92 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 #ifdef VERBOSE 51 printf("lfs_valloc\n"); 52 #endif 53 /* Get the head of the freelist. */ 54 fs = VTOI(ap->a_pvp)->i_lfs; 55 new_ino = fs->lfs_free; 56 #ifdef ALLOCPRINT 57 printf("lfs_ialloc: allocate inode %d\n", new_ino); 58 #endif 59 60 /* 61 * Remove the inode from the free list and write the new start 62 * of the free list into the superblock. 63 */ 64 LFS_IENTRY(ifp, fs, new_ino, bp); 65 if (ifp->if_daddr != LFS_UNUSED_DADDR) 66 panic("lfs_ialloc: inuse inode on the free list"); 67 fs->lfs_free = ifp->if_nextfree; 68 brelse(bp); 69 70 /* Extend IFILE so that the next lfs_valloc will succeed. */ 71 if (fs->lfs_free == LFS_UNUSED_INUM) { 72 vp = fs->lfs_ivnode; 73 ip = VTOI(vp); 74 blkno = lblkno(fs, ip->i_size); 75 printf("Extending ifile: blkno = %d\n", blkno); 76 bp = getblk(vp, blkno, fs->lfs_bsize); 77 if (!bp) { 78 uprintf("\n%s: no inodes left\n", fs->lfs_fsmnt); 79 log(LOG_ERR, "uid %d on %s: out of inodes\n", 80 ap->a_cred->cr_uid, fs->lfs_fsmnt); 81 return (ENOSPC); 82 } 83 i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) * 84 fs->lfs_ifpb; 85 printf("Extending ifile: first inum = %d\n", i); 86 fs->lfs_free = i; 87 max = i + fs->lfs_ifpb; 88 printf("Extending ifile: max inum = %d\n", max); 89 for (ifp = (struct ifile *)bp->b_un.b_words; i < max; ++ifp) { 90 ifp->if_version = 1; 91 ifp->if_daddr = LFS_UNUSED_DADDR; 92 ifp->if_nextfree = ++i; 93 } 94 ifp--; 95 ifp->if_nextfree = LFS_UNUSED_INUM; 96 97 ip->i_blocks += btodb(fs->lfs_bsize); 98 fs->lfs_bfree -= btodb(fs->lfs_bsize); 99 ip->i_size += fs->lfs_bsize; 100 printf("Extending ifile: blocks = %d size = %d\n", ip->i_blocks, ip->i_size); 101 vnode_pager_setsize(vp, (u_long)ip->i_size); 102 vnode_pager_uncache(vp); 103 LFS_UBWRITE(bp); 104 } 105 106 /* Create a vnode to associate with the inode. */ 107 if (error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp)) 108 return (error); 109 *ap->a_vpp = vp; 110 vp->v_flag |= VDIROP; 111 ip = VTOI(vp); 112 VREF(ip->i_devvp); 113 114 /* Zero out the direct and indirect block addresses. */ 115 bzero(ip->i_db, (NDADDR + NIADDR) * sizeof(daddr_t)); 116 117 /* Set a new generation number for this inode. */ 118 if (++nextgennumber < (u_long)time.tv_sec) 119 nextgennumber = time.tv_sec; 120 ip->i_gen = nextgennumber; 121 122 /* Insert into the inode hash table. */ 123 ufs_ihashins(ip); 124 125 /* Set superblock modified bit and increment file count. */ 126 fs->lfs_fmod = 1; 127 ++fs->lfs_nfiles; 128 return (0); 129 } 130 131 /* Create a new vnode/inode pair and initialize what fields we can. */ 132 int 133 lfs_vcreate(mp, ino, vpp) 134 struct mount *mp; 135 ino_t ino; 136 struct vnode **vpp; 137 { 138 extern int (**lfs_vnodeop_p)(); 139 struct inode *ip; 140 struct ufsmount *ump; 141 int error, i; 142 143 #ifdef VERBOSE 144 printf("lfs_vcreate: ino %d\n", ino); 145 #endif 146 /* Create the vnode. */ 147 if (error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) { 148 *vpp = NULL; 149 return (error); 150 } 151 152 /* Get a pointer to the private mount structure. */ 153 ump = VFSTOUFS(mp); 154 155 /* Initialize the inode. */ 156 MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK); 157 (*vpp)->v_data = ip; 158 ip->i_vnode = *vpp; 159 ip->i_devvp = ump->um_devvp; 160 ip->i_flag = 0; 161 ip->i_dev = ump->um_dev; 162 ip->i_number = ip->i_din.di_inum = ino; 163 ip->i_lfs = ump->um_lfs; 164 #ifdef QUOTA 165 for (i = 0; i < MAXQUOTAS; i++) 166 ip->i_dquot[i] = NODQUOT; 167 #endif 168 ip->i_lockf = 0; 169 ip->i_diroff = 0; 170 ip->i_mode = 0; 171 ip->i_size = 0; 172 ip->i_blocks = 0; 173 return (0); 174 } 175 176 /* Free an inode. */ 177 /* ARGUSED */ 178 int 179 lfs_vfree(ap) 180 struct vop_vfree_args /* { 181 struct vnode *a_pvp; 182 ino_t a_ino; 183 int a_mode; 184 } */ *ap; 185 { 186 SEGUSE *sup; 187 struct buf *bp; 188 struct ifile *ifp; 189 struct inode *ip; 190 struct lfs *fs; 191 daddr_t old_iaddr; 192 ino_t ino; 193 194 ip = VTOI(ap->a_pvp); 195 #ifdef VERBOSE 196 printf("lfs_vfree: free %d\n", ip->i_number); 197 #endif 198 /* Get the inode number and file system. */ 199 fs = ip->i_lfs; 200 ino = ip->i_number; 201 202 /* 203 * Set the ifile's inode entry to unused, increment its version number 204 * and link it into the free chain. 205 */ 206 LFS_IENTRY(ifp, fs, ino, bp); 207 old_iaddr = ifp->if_daddr; 208 ifp->if_daddr = LFS_UNUSED_DADDR; 209 ++ifp->if_version; 210 ifp->if_nextfree = fs->lfs_free; 211 fs->lfs_free = ino; 212 LFS_UBWRITE(bp); 213 214 if (old_iaddr != LFS_UNUSED_DADDR) { 215 LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp); 216 #ifdef DIAGNOSTIC 217 if (sup->su_nbytes < sizeof(struct dinode)) 218 panic("lfs_vfree: negative byte count (segment %d)\n", 219 datosn(fs, old_iaddr)); 220 #endif 221 sup->su_nbytes -= sizeof(struct dinode); 222 LFS_UBWRITE(bp); 223 } 224 225 /* Set superblock modified bit and decrement file count. */ 226 fs->lfs_fmod = 1; 227 --fs->lfs_nfiles; 228 return (0); 229 } 230