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 7.50 (Berkeley) 07/29/92 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 bp = getblk(vp, blkno, fs->lfs_bsize); 76 if (!bp) { 77 uprintf("\n%s: no inodes left\n", fs->lfs_fsmnt); 78 log(LOG_ERR, "uid %d on %s: out of inodes\n", 79 ap->a_cred->cr_uid, fs->lfs_fsmnt); 80 return (ENOSPC); 81 } 82 i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) * 83 fs->lfs_ifpb; 84 fs->lfs_free = i; 85 max = i + fs->lfs_ifpb; 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 += btodb(fs->lfs_bsize); 95 fs->lfs_bfree -= btodb(fs->lfs_bsize); 96 ip->i_size += fs->lfs_bsize; 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(ap->a_pvp->v_mount, new_ino, &vp)) 104 return (error); 105 *ap->a_vpp = vp; 106 vp->v_flag |= VDIROP; 107 ip = VTOI(vp); 108 VREF(ip->i_devvp); 109 110 /* Zero out the direct and indirect block addresses. */ 111 bzero(ip->i_db, (NDADDR + NIADDR) * sizeof(daddr_t)); 112 113 /* Set a new generation number for this inode. */ 114 if (++nextgennumber < (u_long)time.tv_sec) 115 nextgennumber = time.tv_sec; 116 ip->i_gen = nextgennumber; 117 118 /* Insert into the inode hash table. */ 119 ufs_ihashins(ip); 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 #ifdef VERBOSE 140 printf("lfs_vcreate: ino %d\n", ino); 141 #endif 142 /* Create the vnode. */ 143 if (error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) { 144 *vpp = NULL; 145 return (error); 146 } 147 148 /* Get a pointer to the private mount structure. */ 149 ump = VFSTOUFS(mp); 150 151 /* Initialize the inode. */ 152 MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK); 153 (*vpp)->v_data = ip; 154 ip->i_vnode = *vpp; 155 ip->i_devvp = ump->um_devvp; 156 ip->i_flag = 0; 157 ip->i_dev = ump->um_dev; 158 ip->i_number = ip->i_din.di_inum = ino; 159 ip->i_lfs = ump->um_lfs; 160 #ifdef QUOTA 161 for (i = 0; i < MAXQUOTAS; i++) 162 ip->i_dquot[i] = NODQUOT; 163 #endif 164 ip->i_lockf = 0; 165 ip->i_diroff = 0; 166 ip->i_mode = 0; 167 ip->i_size = 0; 168 ip->i_blocks = 0; 169 return (0); 170 } 171 172 /* Free an inode. */ 173 /* ARGUSED */ 174 int 175 lfs_vfree(ap) 176 struct vop_vfree_args /* { 177 struct vnode *a_pvp; 178 ino_t a_ino; 179 int a_mode; 180 } */ *ap; 181 { 182 SEGUSE *sup; 183 struct buf *bp; 184 struct ifile *ifp; 185 struct inode *ip; 186 struct lfs *fs; 187 daddr_t old_iaddr; 188 ino_t ino; 189 190 ip = VTOI(ap->a_pvp); 191 #ifdef VERBOSE 192 printf("lfs_vfree: free %d\n", ip->i_number); 193 #endif 194 /* Get the inode number and file system. */ 195 fs = ip->i_lfs; 196 ino = ip->i_number; 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 LFS_UBWRITE(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 LFS_UBWRITE(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