/* $NetBSD: lfs_alloc.c,v 1.21 1999/04/16 16:23:46 perseant Exp $ */ /*- * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Konrad E. Schroder . * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)lfs_alloc.c 8.4 (Berkeley) 1/4/94 */ #if defined(_KERNEL) && !defined(_LKM) #include "opt_quota.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern struct lock ufs_hashlock; /* Allocate a new inode. */ /* ARGSUSED */ int lfs_valloc(v) void *v; { struct vop_valloc_args /* { struct vnode *a_pvp; int a_mode; struct ucred *a_cred; struct vnode **a_vpp; } */ *ap = v; struct lfs *fs; struct buf *bp; struct ifile *ifp; struct inode *ip; struct vnode *vp; ufs_daddr_t blkno; ino_t new_ino; u_long i, max; int error; fs = VTOI(ap->a_pvp)->i_lfs; /* * Prevent a race getting lfs_free - XXX - KS * (this should be a proper lock, in struct lfs) */ while(lockmgr(&ufs_hashlock, LK_EXCLUSIVE|LK_SLEEPFAIL, 0)) ; /* Get the head of the freelist. */ new_ino = fs->lfs_free; #ifdef DIAGNOSTIC if(new_ino == LFS_UNUSED_INUM) { #ifdef DEBUG lfs_dump_super(fs); #endif /* DEBUG */ panic("inode 0 allocated [1]"); } #endif /* DIAGNOSTIC */ #ifdef ALLOCPRINT printf("lfs_ialloc: allocate inode %d\n", new_ino); #endif /* * Remove the inode from the free list and write the new start * of the free list into the superblock. */ LFS_IENTRY(ifp, fs, new_ino, bp); if (ifp->if_daddr != LFS_UNUSED_DADDR) panic("lfs_ialloc: inuse inode %d on the free list", new_ino); fs->lfs_free = ifp->if_nextfree; brelse(bp); /* Extend IFILE so that the next lfs_valloc will succeed. */ if (fs->lfs_free == LFS_UNUSED_INUM) { vp = fs->lfs_ivnode; VOP_LOCK(vp,LK_EXCLUSIVE); ip = VTOI(vp); blkno = lblkno(fs, ip->i_ffs_size); lfs_balloc(vp, 0, fs->lfs_bsize, blkno, &bp); ip->i_ffs_size += fs->lfs_bsize; uvm_vnp_setsize(vp, ip->i_ffs_size); (void)uvm_vnp_uncache(vp); i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) * fs->lfs_ifpb; fs->lfs_free = i; #ifdef DIAGNOSTIC if(fs->lfs_free == LFS_UNUSED_INUM) panic("inode 0 allocated [2]"); #endif /* DIAGNOSTIC */ max = i + fs->lfs_ifpb; for (ifp = (struct ifile *)bp->b_data; i < max; ++ifp) { ifp->if_version = 1; ifp->if_daddr = LFS_UNUSED_DADDR; ifp->if_nextfree = ++i; } ifp--; ifp->if_nextfree = LFS_UNUSED_INUM; VOP_UNLOCK(vp,0); if ((error = VOP_BWRITE(bp)) != 0) { lockmgr(&ufs_hashlock, LK_RELEASE, 0); return (error); } } lockmgr(&ufs_hashlock, LK_RELEASE, 0); #ifdef DIAGNOSTIC if(fs->lfs_free == LFS_UNUSED_INUM) panic("inode 0 allocated [3]"); #endif /* DIAGNOSTIC */ /* Create a vnode to associate with the inode. */ if ((error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp)) != 0) return (error); ip = VTOI(vp); /* Zero out the direct and indirect block addresses. */ bzero(&ip->i_din, sizeof(ip->i_din)); ip->i_din.ffs_din.di_inumber = new_ino; /* Set a new generation number for this inode. */ ip->i_ffs_gen++; /* Insert into the inode hash table. */ ufs_ihashins(ip); error = ufs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p, &vp); if (error) { vput(vp); *ap->a_vpp = NULL; return (error); } *ap->a_vpp = vp; if(!(vp->v_flag & VDIROP)) { lfs_vref(vp); ++fs->lfs_dirvcount; } vp->v_flag |= VDIROP; VREF(ip->i_devvp); /* Set superblock modified bit and increment file count. */ fs->lfs_fmod = 1; ++fs->lfs_nfiles; return (0); } /* Create a new vnode/inode pair and initialize what fields we can. */ int lfs_vcreate(mp, ino, vpp) struct mount *mp; ino_t ino; struct vnode **vpp; { extern int (**lfs_vnodeop_p) __P((void *)); struct inode *ip; struct ufsmount *ump; int error; #ifdef QUOTA int i; #endif /* Create the vnode. */ if ((error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) != 0) { *vpp = NULL; return (error); } /* Get a pointer to the private mount structure. */ ump = VFSTOUFS(mp); /* Initialize the inode. */ ip = pool_get(&lfs_inode_pool, PR_WAITOK); lockinit(&ip->i_lock, PINOD, "lfsinode", 0, 0); (*vpp)->v_data = ip; ip->i_vnode = *vpp; ip->i_devvp = ump->um_devvp; ip->i_flag = IN_MODIFIED; ip->i_dev = ump->um_dev; ip->i_number = ip->i_din.ffs_din.di_inumber = ino; ip->i_lfs = ump->um_lfs; #ifdef QUOTA for (i = 0; i < MAXQUOTAS; i++) ip->i_dquot[i] = NODQUOT; #endif ip->i_lockf = 0; ip->i_diroff = 0; ip->i_ffs_mode = 0; ip->i_ffs_size = 0; ip->i_ffs_blocks = 0; ++ump->um_lfs->lfs_uinodes; return (0); } /* Free an inode. */ /* ARGUSED */ int lfs_vfree(v) void *v; { struct vop_vfree_args /* { struct vnode *a_pvp; ino_t a_ino; int a_mode; } */ *ap = v; SEGUSE *sup; struct buf *bp; struct ifile *ifp; struct inode *ip; struct lfs *fs; ufs_daddr_t old_iaddr; ino_t ino; int already_locked; /* Get the inode number and file system. */ ip = VTOI(ap->a_pvp); fs = ip->i_lfs; ino = ip->i_number; /* If we already hold ufs_hashlock, don't panic, just do it anyway */ already_locked = lockstatus(&ufs_hashlock) && ufs_hashlock.lk_lockholder == curproc->p_pid; while(WRITEINPROG(ap->a_pvp) || fs->lfs_seglock || (!already_locked && lockmgr(&ufs_hashlock, LK_EXCLUSIVE|LK_SLEEPFAIL, 0))) { if (WRITEINPROG(ap->a_pvp)) { tsleep(ap->a_pvp, (PRIBIO+1), "lfs_vfree", 0); } if (fs->lfs_seglock) { if (fs->lfs_lockpid == curproc->p_pid) { break; } else { tsleep(&fs->lfs_seglock, PRIBIO + 1, "lfs_vfr1", 0); } } } if (ip->i_flag & IN_CLEANING) { --fs->lfs_uinodes; ip->i_flag &= ~IN_CLEANING; } if (ip->i_flag & IN_MODIFIED) { --fs->lfs_uinodes; ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE); } #ifdef DEBUG_LFS if((int32_t)fs->lfs_uinodes<0) { printf("U1"); fs->lfs_uinodes=0; } #endif /* * Set the ifile's inode entry to unused, increment its version number * and link it into the free chain. */ LFS_IENTRY(ifp, fs, ino, bp); old_iaddr = ifp->if_daddr; ifp->if_daddr = LFS_UNUSED_DADDR; ++ifp->if_version; ifp->if_nextfree = fs->lfs_free; fs->lfs_free = ino; (void) VOP_BWRITE(bp); #ifdef DIAGNOSTIC if(fs->lfs_free == LFS_UNUSED_INUM) { panic("inode 0 freed"); } #endif /* DIAGNOSTIC */ if (old_iaddr != LFS_UNUSED_DADDR) { LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp); if (sup->su_nbytes < DINODE_SIZE) { sup->su_nbytes = DINODE_SIZE; #ifdef DIAGNOSTIC panic("lfs_vfree: negative byte count (segment %d)\n", datosn(fs, old_iaddr)); #endif /* DIAGNOSTIC */ } sup->su_nbytes -= DINODE_SIZE; (void) VOP_BWRITE(bp); } if(!already_locked) lockmgr(&ufs_hashlock, LK_RELEASE, 0); /* Set superblock modified bit and decrement file count. */ fs->lfs_fmod = 1; --fs->lfs_nfiles; return (0); }