Ejemplo n.º 1
0
/*
 * Allocate a particular inode with a particular version number, freeing
 * any previous versions of this inode that may have gone before.
 * Used by the roll-forward code.
 *
 * XXX this function does not have appropriate locking to be used on a live fs;
 * XXX but something similar could probably be used for an "undelete" call.
 *
 * Called with the Ifile inode locked.
 */
int
lfs_rf_valloc(struct lfs *fs, ino_t ino, int vers, struct lwp *l,
	      struct vnode **vpp)
{
	IFILE *ifp;
	struct buf *bp, *cbp;
	struct vnode *vp;
	struct inode *ip;
	ino_t tino, oldnext;
	int error;
	CLEANERINFO *cip;

	ASSERT_SEGLOCK(fs); /* XXX it doesn't, really */

	/*
	 * First, just try a vget. If the version number is the one we want,
	 * we don't have to do anything else.  If the version number is wrong,
	 * take appropriate action.
	 */
	error = VFS_VGET(fs->lfs_ivnode->v_mount, ino, &vp);
	if (error == 0) {
		DLOG((DLOG_RF, "lfs_rf_valloc[1]: ino %d vp %p\n", ino, vp));

		*vpp = vp;
		ip = VTOI(vp);
		if (ip->i_gen == vers)
			return 0;
		else if (ip->i_gen < vers) {
			lfs_truncate(vp, (off_t)0, 0, NOCRED);
			ip->i_gen = ip->i_ffs1_gen = vers;
			LFS_SET_UINO(ip, IN_CHANGE | IN_UPDATE);
			return 0;
		} else {
			DLOG((DLOG_RF, "ino %d: sought version %d, got %d\n",
			       ino, vers, ip->i_ffs1_gen));
			vput(vp);
			*vpp = NULLVP;
			return EEXIST;
		}
	}

	/*
	 * The inode is not in use.  Find it on the free list.
	 */
	/* If the Ifile is too short to contain this inum, extend it */
	while (VTOI(fs->lfs_ivnode)->i_size <= (ino /
		fs->lfs_ifpb + fs->lfs_cleansz + fs->lfs_segtabsz)
		<< fs->lfs_bshift) {
		lfs_extend_ifile(fs, NOCRED);
	}

	LFS_IENTRY(ifp, fs, ino, bp);
	oldnext = ifp->if_nextfree;
	ifp->if_version = vers;
	brelse(bp, 0);

	LFS_GET_HEADFREE(fs, cip, cbp, &ino);
	if (ino) {
		LFS_PUT_HEADFREE(fs, cip, cbp, oldnext);
	} else {
		tino = ino;
		while (1) {
			LFS_IENTRY(ifp, fs, tino, bp);
			if (ifp->if_nextfree == ino ||
			    ifp->if_nextfree == LFS_UNUSED_INUM)
				break;
			tino = ifp->if_nextfree;
			brelse(bp, 0);
		}
		if (ifp->if_nextfree == LFS_UNUSED_INUM) {
			brelse(bp, 0);
			return ENOENT;
		}
		ifp->if_nextfree = oldnext;
		LFS_BWRITE_LOG(bp);
	}

	error = lfs_ialloc(fs, fs->lfs_ivnode, ino, vers, &vp);
	if (error == 0) {
		/*
		 * Make it VREG so we can put blocks on it.  We will change
		 * this later if it turns out to be some other kind of file.
		 */
		ip = VTOI(vp);
		ip->i_mode = ip->i_ffs1_mode = IFREG;
		ip->i_nlink = ip->i_ffs1_nlink = 1;
		ufs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p, &vp);
		ip = VTOI(vp);

		DLOG((DLOG_RF, "lfs_rf_valloc: ino %d vp %p\n", ino, vp));

		/* The dirop-nature of this vnode is past */
		lfs_unmark_vnode(vp);
		(void)lfs_vunref(vp);
		vp->v_uflag &= ~VU_DIROP;
		mutex_enter(&lfs_lock);
		--lfs_dirvcount;
		--fs->lfs_dirvcount;
		TAILQ_REMOVE(&fs->lfs_dchainhd, ip, i_lfs_dchain);
		wakeup(&lfs_dirvcount);
		wakeup(&fs->lfs_dirvcount);
		mutex_exit(&lfs_lock);
	}
	*vpp = vp;
	return error;
}
Ejemplo n.º 2
0
static int
update_inoblk(struct lfs *fs, daddr_t offset, kauth_cred_t cred,
	      struct lwp *l)
{
	struct vnode *devvp, *vp;
	struct inode *ip;
	struct ufs1_dinode *dip;
	struct buf *dbp, *ibp;
	int error;
	daddr_t daddr;
	IFILE *ifp;
	SEGUSE *sup;

	devvp = VTOI(fs->lfs_ivnode)->i_devvp;

	/*
	 * Get the inode, update times and perms.
	 * DO NOT update disk blocks, we do that separately.
	 */
	error = bread(devvp, fsbtodb(fs, offset), fs->lfs_ibsize,
	    cred, 0, &dbp);
	if (error) {
		DLOG((DLOG_RF, "update_inoblk: bread returned %d\n", error));
		return error;
	}
	dip = ((struct ufs1_dinode *)(dbp->b_data)) + INOPB(fs);
	while (--dip >= (struct ufs1_dinode *)dbp->b_data) {
		if (dip->di_inumber > LFS_IFILE_INUM) {
			error = lfs_rf_valloc(fs, dip->di_inumber, dip->di_gen,
					      l, &vp);
			if (error) {
				DLOG((DLOG_RF, "update_inoblk: lfs_rf_valloc"
				      " returned %d\n", error));
				continue;
			}
			ip = VTOI(vp);
			if (dip->di_size != ip->i_size)
				lfs_truncate(vp, dip->di_size, 0, NOCRED);
			/* Get mode, link count, size, and times */
			memcpy(ip->i_din.ffs1_din, dip,
			       offsetof(struct ufs1_dinode, di_db[0]));

			/* Then the rest, except di_blocks */
			ip->i_flags = ip->i_ffs1_flags = dip->di_flags;
			ip->i_gen = ip->i_ffs1_gen = dip->di_gen;
			ip->i_uid = ip->i_ffs1_uid = dip->di_uid;
			ip->i_gid = ip->i_ffs1_gid = dip->di_gid;

			ip->i_mode = ip->i_ffs1_mode;
			ip->i_nlink = ip->i_ffs1_nlink;
			ip->i_size = ip->i_ffs1_size;

			LFS_SET_UINO(ip, IN_CHANGE | IN_UPDATE);

			/* Re-initialize to get type right */
			ufs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p,
				  &vp);
			vput(vp);

			/* Record change in location */
			LFS_IENTRY(ifp, fs, dip->di_inumber, ibp);
			daddr = ifp->if_daddr;
			ifp->if_daddr = dbtofsb(fs, dbp->b_blkno);
			error = LFS_BWRITE_LOG(ibp); /* Ifile */
			/* And do segment accounting */
			if (dtosn(fs, daddr) != dtosn(fs, dbtofsb(fs, dbp->b_blkno))) {
				if (daddr > 0) {
					LFS_SEGENTRY(sup, fs, dtosn(fs, daddr),
						     ibp);
					sup->su_nbytes -= sizeof (struct ufs1_dinode);
					LFS_WRITESEGENTRY(sup, fs,
							  dtosn(fs, daddr),
							  ibp);
				}
				LFS_SEGENTRY(sup, fs, dtosn(fs, dbtofsb(fs, dbp->b_blkno)),
					     ibp);
				sup->su_nbytes += sizeof (struct ufs1_dinode);
				LFS_WRITESEGENTRY(sup, fs,
						  dtosn(fs, dbtofsb(fs, dbp->b_blkno)),
						  ibp);
			}
		}
	}
Ejemplo n.º 3
0
void
lfs_itimes(struct inode *ip, const struct timespec *acc,
    const struct timespec *mod, const struct timespec *cre)
{
#ifdef _KERNEL
	struct timespec now;

	KASSERT(ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY));

	vfs_timestamp(&now);
#endif

	if (ip->i_flag & IN_ACCESS) {
#ifdef _KERNEL
		if (acc == NULL)
			acc = &now;
#endif
		ip->i_ffs1_atime = acc->tv_sec;
		ip->i_ffs1_atimensec = acc->tv_nsec;
		if (ip->i_lfs->lfs_is64 || lfs_sb_getversion(ip->i_lfs) > 1) {
			struct lfs *fs = ip->i_lfs;
			struct buf *ibp;
			IFILE *ifp;

			LFS_IENTRY(ifp, ip->i_lfs, ip->i_number, ibp);
			lfs_if_setatime_sec(fs, ifp, acc->tv_sec);
			lfs_if_setatime_nsec(fs, ifp, acc->tv_nsec);
			LFS_BWRITE_LOG(ibp);
			mutex_enter(&lfs_lock);
			fs->lfs_flags |= LFS_IFDIRTY;
			mutex_exit(&lfs_lock);
		} else {
			mutex_enter(&lfs_lock);
			LFS_SET_UINO(ip, IN_ACCESSED);
			mutex_exit(&lfs_lock);
		}
	}
	if (ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFY)) {
		if (ip->i_flag & (IN_UPDATE | IN_MODIFY)) {
#ifdef _KERNEL
			if (mod == NULL)
				mod = &now;
#endif
			ip->i_ffs1_mtime = mod->tv_sec;
			ip->i_ffs1_mtimensec = mod->tv_nsec;
			ip->i_modrev++;
		}
		if (ip->i_flag & (IN_CHANGE | IN_MODIFY)) {
#ifdef _KERNEL
			if (cre == NULL)
				cre = &now;
#endif
			ip->i_ffs1_ctime = cre->tv_sec;
			ip->i_ffs1_ctimensec = cre->tv_nsec;
		}
		mutex_enter(&lfs_lock);
		if (ip->i_flag & (IN_CHANGE | IN_UPDATE))
			LFS_SET_UINO(ip, IN_MODIFIED);
		if (ip->i_flag & IN_MODIFY)
			LFS_SET_UINO(ip, IN_ACCESSED);
		mutex_exit(&lfs_lock);
	}
	ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY);
}
Ejemplo n.º 4
0
/*
 * Actually mark the segment clean.
 * Must be called with the segment lock held.
 */
int
lfs_do_segclean(struct lfs *fs, unsigned long segnum)
{
	extern int lfs_dostats;
	struct buf *bp;
	CLEANERINFO *cip;
	SEGUSE *sup;

	if (lfs_dtosn(fs, fs->lfs_curseg) == segnum) {
		return (EBUSY);
	}

	LFS_SEGENTRY(sup, fs, segnum, bp);
	if (sup->su_nbytes) {
		DLOG((DLOG_CLEAN, "lfs_segclean: not cleaning segment %lu:"
		      " %d live bytes\n", segnum, sup->su_nbytes));
		brelse(bp, 0);
		return (EBUSY);
	}
	if (sup->su_flags & SEGUSE_ACTIVE) {
		DLOG((DLOG_CLEAN, "lfs_segclean: not cleaning segment %lu:"
		      " segment is active\n", segnum));
		brelse(bp, 0);
		return (EBUSY);
	}
	if (!(sup->su_flags & SEGUSE_DIRTY)) {
		DLOG((DLOG_CLEAN, "lfs_segclean: not cleaning segment %lu:"
		      " segment is already clean\n", segnum));
		brelse(bp, 0);
		return (EALREADY);
	}

	fs->lfs_avail += lfs_segtod(fs, 1);
	if (sup->su_flags & SEGUSE_SUPERBLOCK)
		fs->lfs_avail -= lfs_btofsb(fs, LFS_SBPAD);
	if (fs->lfs_version > 1 && segnum == 0 &&
	    fs->lfs_start < lfs_btofsb(fs, LFS_LABELPAD))
		fs->lfs_avail -= lfs_btofsb(fs, LFS_LABELPAD) - fs->lfs_start;
	mutex_enter(&lfs_lock);
	fs->lfs_bfree += sup->su_nsums * lfs_btofsb(fs, fs->lfs_sumsize) +
		lfs_btofsb(fs, sup->su_ninos * fs->lfs_ibsize);
	fs->lfs_dmeta -= sup->su_nsums * lfs_btofsb(fs, fs->lfs_sumsize) +
		lfs_btofsb(fs, sup->su_ninos * fs->lfs_ibsize);
	if (fs->lfs_dmeta < 0)
		fs->lfs_dmeta = 0;
	mutex_exit(&lfs_lock);
	sup->su_flags &= ~SEGUSE_DIRTY;
	LFS_WRITESEGENTRY(sup, fs, segnum, bp);

	LFS_CLEANERINFO(cip, fs, bp);
	++cip->clean;
	--cip->dirty;
	fs->lfs_nclean = cip->clean;
	cip->bfree = fs->lfs_bfree;
	mutex_enter(&lfs_lock);
	cip->avail = fs->lfs_avail - fs->lfs_ravail - fs->lfs_favail;
	wakeup(&fs->lfs_avail);
	mutex_exit(&lfs_lock);
	(void) LFS_BWRITE_LOG(bp);

	if (lfs_dostats)
		++lfs_stats.segs_reclaimed;

	return (0);
}
Ejemplo n.º 5
0
/*
 * Actually mark the segment clean.
 * Must be called with the segment lock held.
 */
int
lfs_do_segclean(struct lfs *fs, unsigned long segnum)
{
	extern int lfs_dostats;
	struct buf *bp;
	CLEANERINFO *cip;
	SEGUSE *sup;

	if (lfs_dtosn(fs, lfs_sb_getcurseg(fs)) == segnum) {
		return (EBUSY);
	}

	LFS_SEGENTRY(sup, fs, segnum, bp);
	if (sup->su_nbytes) {
		DLOG((DLOG_CLEAN, "lfs_segclean: not cleaning segment %lu:"
		      " %d live bytes\n", segnum, sup->su_nbytes));
		brelse(bp, 0);
		return (EBUSY);
	}
	if (sup->su_flags & SEGUSE_ACTIVE) {
		DLOG((DLOG_CLEAN, "lfs_segclean: not cleaning segment %lu:"
		      " segment is active\n", segnum));
		brelse(bp, 0);
		return (EBUSY);
	}
	if (!(sup->su_flags & SEGUSE_DIRTY)) {
		DLOG((DLOG_CLEAN, "lfs_segclean: not cleaning segment %lu:"
		      " segment is already clean\n", segnum));
		brelse(bp, 0);
		return (EALREADY);
	}

	lfs_sb_addavail(fs, lfs_segtod(fs, 1));
	if (sup->su_flags & SEGUSE_SUPERBLOCK)
		lfs_sb_subavail(fs, lfs_btofsb(fs, LFS_SBPAD));
	if (lfs_sb_getversion(fs) > 1 && segnum == 0 &&
	    lfs_sb_gets0addr(fs) < lfs_btofsb(fs, LFS_LABELPAD))
		lfs_sb_subavail(fs, lfs_btofsb(fs, LFS_LABELPAD) - lfs_sb_gets0addr(fs));
	mutex_enter(&lfs_lock);
	lfs_sb_addbfree(fs, sup->su_nsums * lfs_btofsb(fs, lfs_sb_getsumsize(fs)) +
		lfs_btofsb(fs, sup->su_ninos * lfs_sb_getibsize(fs)));
	lfs_sb_subdmeta(fs, sup->su_nsums * lfs_btofsb(fs, lfs_sb_getsumsize(fs)) +
		lfs_btofsb(fs, sup->su_ninos * lfs_sb_getibsize(fs)));
	if (lfs_sb_getdmeta(fs) < 0)
		lfs_sb_setdmeta(fs, 0);
	mutex_exit(&lfs_lock);
	sup->su_flags &= ~SEGUSE_DIRTY;
	LFS_WRITESEGENTRY(sup, fs, segnum, bp);

	LFS_CLEANERINFO(cip, fs, bp);
	lfs_ci_shiftdirtytoclean(fs, cip, 1);
	lfs_sb_setnclean(fs, lfs_ci_getclean(fs, cip));
	mutex_enter(&lfs_lock);
	lfs_ci_setbfree(fs, cip, lfs_sb_getbfree(fs));
	lfs_ci_setavail(fs, cip, lfs_sb_getavail(fs)
			- fs->lfs_ravail - fs->lfs_favail);
	wakeup(&fs->lfs_availsleep);
	mutex_exit(&lfs_lock);
	(void) LFS_BWRITE_LOG(bp);

	if (lfs_dostats)
		++lfs_stats.segs_reclaimed;

	return (0);
}