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 7.42 (Berkeley) 05/04/92 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(pvp, notused, cred, vpp) 33 struct vnode *pvp, **vpp; 34 int notused; 35 struct ucred *cred; 36 { 37 struct lfs *fs; 38 struct buf *bp; 39 struct ifile *ifp; 40 struct inode *ip; 41 struct vnode *vp; 42 daddr_t blkno; 43 ino_t new_ino; 44 u_long i, max; 45 int error; 46 47 #ifdef VERBOSE 48 printf("lfs_valloc\n"); 49 #endif 50 /* Get the head of the freelist. */ 51 fs = VTOI(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 printf("Extending ifile: blkno = %d\n", blkno); 73 bp = getblk(vp, blkno, fs->lfs_bsize); 74 if (!bp) { 75 uprintf("\n%s: no inodes left\n", fs->lfs_fsmnt); 76 log(LOG_ERR, "uid %d on %s: out of inodes\n", 77 cred->cr_uid, fs->lfs_fsmnt); 78 return (ENOSPC); 79 } 80 i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) * 81 fs->lfs_ifpb; 82 printf("Extending ifile: first inum = %d\n", i); 83 fs->lfs_free = i; 84 max = i + fs->lfs_ifpb; 85 printf("Extending ifile: max inum = %d\n", max); 86 for (ifp = (struct ifile *)bp->b_un.b_words; i < max; ++ifp) { 87 ifp->if_version = 1; 88 ifp->if_daddr = LFS_UNUSED_DADDR; 89 ifp->if_nextfree = ++i; 90 } 91 ifp--; 92 ifp->if_nextfree = LFS_UNUSED_INUM; 93 94 ++ip->i_blocks; /* XXX This may not be right. */ 95 ip->i_size += fs->lfs_bsize; 96 printf("Extending ifile: blocks = %d size = %d\n", ip->i_blocks, ip->i_size); 97 vnode_pager_setsize(vp, (u_long)ip->i_size); 98 vnode_pager_uncache(vp); 99 LFS_UBWRITE(bp); 100 } 101 102 /* Create a vnode to associate with the inode. */ 103 if (error = lfs_vcreate(pvp->v_mount, new_ino, &vp)) 104 return (error); 105 *vpp = vp; 106 ip = VTOI(vp); 107 VREF(ip->i_devvp); 108 109 /* Zero out the direct and indirect block addresses. */ 110 bzero(ip->i_db, (NDADDR + NIADDR) * sizeof(daddr_t)); 111 112 /* Set a new generation number for this inode. */ 113 if (++nextgennumber < (u_long)time.tv_sec) 114 nextgennumber = time.tv_sec; 115 ip->i_gen = nextgennumber; 116 117 /* Insert into the inode hash table. */ 118 ufs_ihashins(ip); 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 struct vnodeops lfs_vnodeops; 134 struct inode *ip; 135 struct ufsmount *ump; 136 int error, i; 137 138 #ifdef VERBOSE 139 printf("lfs_vcreate: ino %d\n", ino); 140 #endif 141 /* Create the vnode. */ 142 if (error = getnewvnode(VT_LFS, mp, &lfs_vnodeops, vpp)) { 143 *vpp = NULL; 144 return (error); 145 } 146 147 /* Get a pointer to the private mount structure. */ 148 ump = VFSTOUFS(mp); 149 150 /* Initialize the inode. */ 151 MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK); 152 (*vpp)->v_data = ip; 153 ip->i_vnode = *vpp; 154 ip->i_devvp = ump->um_devvp; 155 ip->i_flag = 0; 156 ip->i_dev = ump->um_dev; 157 ip->i_number = ip->i_din.di_inum = ino; 158 ip->i_lfs = ump->um_lfs; 159 #ifdef QUOTA 160 for (i = 0; i < MAXQUOTAS; i++) 161 ip->i_dquot[i] = NODQUOT; 162 #endif 163 ip->i_lockf = 0; 164 ip->i_diroff = 0; 165 ip->i_mode = 0; 166 ip->i_size = 0; 167 return (0); 168 } 169 170 /* Free an inode. */ 171 /* ARGUSED */ 172 void 173 lfs_vfree(vp, notused1, notused2) 174 struct vnode *vp; 175 ino_t notused1; 176 int notused2; 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; 185 186 ip = VTOI(vp); 187 #ifdef VERBOSE 188 printf("lfs_vfree: free %d\n", ip->i_number); 189 #endif 190 /* Get the inode number and file system. */ 191 fs = ip->i_lfs; 192 ino = ip->i_number; 193 194 /* 195 * Set the ifile's inode entry to unused, increment its version number 196 * and link it into the free chain. 197 */ 198 LFS_IENTRY(ifp, fs, ino, bp); 199 old_iaddr = ifp->if_daddr; 200 ifp->if_daddr = LFS_UNUSED_DADDR; 201 ++ifp->if_version; 202 ifp->if_nextfree = fs->lfs_free; 203 fs->lfs_free = ino; 204 LFS_UBWRITE(bp); 205 206 if (old_iaddr != LFS_UNUSED_DADDR) { 207 LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp); 208 #ifdef DIAGNOSTIC 209 if (sup->su_nbytes < sizeof(struct dinode)) 210 panic("lfs_vfree: negative byte count (segment %d)\n", 211 datosn(fs, old_iaddr)); 212 #endif 213 sup->su_nbytes -= sizeof(struct dinode); 214 LFS_UBWRITE(bp); 215 } 216 217 /* Set superblock modified bit and decrement file count. */ 218 fs->lfs_fmod = 1; 219 --fs->lfs_nfiles; 220 } 221