| ffs_snapshot.c (92640) | ffs_snapshot.c (92728) |
|---|---|
| 1/* 2 * Copyright 2000 Marshall Kirk McKusick. All Rights Reserved. 3 * 4 * Further information about snapshots can be obtained from: 5 * 6 * Marshall Kirk McKusick http://www.mckusick.com/softdep/ 7 * 1614 Oxford Street mckusick@mckusick.com 8 * Berkeley, CA 94709-1608 +1-510-843-9542 --- 17 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)ffs_snapshot.c 8.11 (McKusick) 7/23/00 | 1/* 2 * Copyright 2000 Marshall Kirk McKusick. All Rights Reserved. 3 * 4 * Further information about snapshots can be obtained from: 5 * 6 * Marshall Kirk McKusick http://www.mckusick.com/softdep/ 7 * 1614 Oxford Street mckusick@mckusick.com 8 * Berkeley, CA 94709-1608 +1-510-843-9542 --- 17 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)ffs_snapshot.c 8.11 (McKusick) 7/23/00 |
| 34 * $FreeBSD: head/sys/ufs/ffs/ffs_snapshot.c 92640 2002-03-19 04:09:21Z bde $ | 34 * $FreeBSD: head/sys/ufs/ffs/ffs_snapshot.c 92728 2002-03-19 22:40:48Z alfred $ |
| 35 */ 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/conf.h> 40#include <sys/bio.h> 41#include <sys/buf.h> 42#include <sys/proc.h> --- 12 unchanged lines hidden (view full) --- 55#include <ufs/ufs/ufs_extern.h> 56 57#include <ufs/ffs/fs.h> 58#include <ufs/ffs/ffs_extern.h> 59 60#define KERNCRED thread0.td_ucred 61#define DEBUG 1 62 | 35 */ 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/conf.h> 40#include <sys/bio.h> 41#include <sys/buf.h> 42#include <sys/proc.h> --- 12 unchanged lines hidden (view full) --- 55#include <ufs/ufs/ufs_extern.h> 56 57#include <ufs/ffs/fs.h> 58#include <ufs/ffs/ffs_extern.h> 59 60#define KERNCRED thread0.td_ucred 61#define DEBUG 1 62 |
| 63static int cgaccount __P((int, struct vnode *, struct buf *, int)); 64static int expunge __P((struct vnode *, struct inode *, struct fs *, 65 int (*) __P((struct vnode *, ufs_daddr_t *, ufs_daddr_t *, struct fs *, 66 ufs_daddr_t, int)), int)); 67static int indiracct __P((struct vnode *, struct vnode *, int, ufs_daddr_t, 68 int, int, int, int, struct fs *, int (*) __P((struct vnode *, 69 ufs_daddr_t *, ufs_daddr_t *, struct fs *, ufs_daddr_t, int)), int)); 70static int fullacct __P((struct vnode *, ufs_daddr_t *, ufs_daddr_t *, 71 struct fs *, ufs_daddr_t, int)); 72static int snapacct __P((struct vnode *, ufs_daddr_t *, ufs_daddr_t *, 73 struct fs *, ufs_daddr_t, int)); 74static int mapacct __P((struct vnode *, ufs_daddr_t *, ufs_daddr_t *, 75 struct fs *, ufs_daddr_t, int)); 76static int ffs_copyonwrite __P((struct vnode *, struct buf *)); 77static int readblock __P((struct buf *, daddr_t)); | 63static int cgaccount(int, struct vnode *, struct buf *, int); 64static int expunge(struct vnode *, struct inode *, struct fs *, 65 int (*)(struct vnode *, ufs_daddr_t *, ufs_daddr_t *, struct fs *, 66 ufs_daddr_t, int), int); 67static int indiracct(struct vnode *, struct vnode *, int, ufs_daddr_t, 68 int, int, int, int, struct fs *, int (*)(struct vnode *, 69 ufs_daddr_t *, ufs_daddr_t *, struct fs *, ufs_daddr_t, int), int); 70static int fullacct(struct vnode *, ufs_daddr_t *, ufs_daddr_t *, 71 struct fs *, ufs_daddr_t, int); 72static int snapacct(struct vnode *, ufs_daddr_t *, ufs_daddr_t *, 73 struct fs *, ufs_daddr_t, int); 74static int mapacct(struct vnode *, ufs_daddr_t *, ufs_daddr_t *, 75 struct fs *, ufs_daddr_t, int); 76static int ffs_copyonwrite(struct vnode *, struct buf *); 77static int readblock(struct buf *, daddr_t); |
| 78 79/* 80 * To ensure the consistency of snapshots across crashes, we must 81 * synchronously write out copied blocks before allowing the 82 * originals to be modified. Because of the rather severe speed 83 * penalty that this imposes, the following flag allows this 84 * crash persistence to be disabled. 85 */ --- 523 unchanged lines hidden (view full) --- 609 * that this snapshot knows that it need not copy them 610 * if the other snapshot holding them is freed. 611 */ 612static int 613expunge(snapvp, cancelip, fs, acctfunc, expungetype) 614 struct vnode *snapvp; 615 struct inode *cancelip; 616 struct fs *fs; | 78 79/* 80 * To ensure the consistency of snapshots across crashes, we must 81 * synchronously write out copied blocks before allowing the 82 * originals to be modified. Because of the rather severe speed 83 * penalty that this imposes, the following flag allows this 84 * crash persistence to be disabled. 85 */ --- 523 unchanged lines hidden (view full) --- 609 * that this snapshot knows that it need not copy them 610 * if the other snapshot holding them is freed. 611 */ 612static int 613expunge(snapvp, cancelip, fs, acctfunc, expungetype) 614 struct vnode *snapvp; 615 struct inode *cancelip; 616 struct fs *fs; |
| 617 int (*acctfunc) __P((struct vnode *, ufs_daddr_t *, ufs_daddr_t *, 618 struct fs *, ufs_daddr_t, int)); | 617 int (*acctfunc)(struct vnode *, ufs_daddr_t *, ufs_daddr_t *, 618 struct fs *, ufs_daddr_t, int); |
| 619 int expungetype; 620{ 621 int i, len, error, numblks, blksperindir; 622 ufs_daddr_t lbn, rlbn, blkno, indiroff; 623 struct thread *td = curthread; 624 struct dinode *dip; 625 struct buf *bp; 626 --- 66 unchanged lines hidden (view full) --- 693 struct vnode *cancelvp; 694 int level; 695 ufs_daddr_t blkno; 696 int lbn; 697 int rlbn; 698 int remblks; 699 int blksperindir; 700 struct fs *fs; | 619 int expungetype; 620{ 621 int i, len, error, numblks, blksperindir; 622 ufs_daddr_t lbn, rlbn, blkno, indiroff; 623 struct thread *td = curthread; 624 struct dinode *dip; 625 struct buf *bp; 626 --- 66 unchanged lines hidden (view full) --- 693 struct vnode *cancelvp; 694 int level; 695 ufs_daddr_t blkno; 696 int lbn; 697 int rlbn; 698 int remblks; 699 int blksperindir; 700 struct fs *fs; |
| 701 int (*acctfunc) __P((struct vnode *, ufs_daddr_t *, ufs_daddr_t *, 702 struct fs *, ufs_daddr_t, int)); | 701 int (*acctfunc)(struct vnode *, ufs_daddr_t *, ufs_daddr_t *, 702 struct fs *, ufs_daddr_t, int); |
| 703 int expungetype; 704{ 705 int subblksperindir, error, last, num, i; 706 struct indir indirs[NIADDR + 2]; 707 ufs_daddr_t *bap; 708 struct buf *bp; 709 710 if ((error = ufs_getlbns(cancelvp, rlbn, indirs, &num)) != 0) --- 688 unchanged lines hidden --- | 703 int expungetype; 704{ 705 int subblksperindir, error, last, num, i; 706 struct indir indirs[NIADDR + 2]; 707 ufs_daddr_t *bap; 708 struct buf *bp; 709 710 if ((error = ufs_getlbns(cancelvp, rlbn, indirs, &num)) != 0) --- 688 unchanged lines hidden --- |