| null_vfsops.c (245665) | null_vfsops.c (250978) |
|---|---|
| 1/*- 2 * Copyright (c) 1992, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software donated to Berkeley by 6 * Jan-Simon Pendry. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 18 unchanged lines hidden (view full) --- 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)null_vfsops.c 8.2 (Berkeley) 1/21/94 33 * 34 * @(#)lofs_vfsops.c 1.2 (Berkeley) 6/18/92 | 1/*- 2 * Copyright (c) 1992, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software donated to Berkeley by 6 * Jan-Simon Pendry. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 18 unchanged lines hidden (view full) --- 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)null_vfsops.c 8.2 (Berkeley) 1/21/94 33 * 34 * @(#)lofs_vfsops.c 1.2 (Berkeley) 6/18/92 |
| 35 * $FreeBSD: stable/9/sys/fs/nullfs/null_vfsops.c 245665 2013-01-19 06:39:49Z kib $ | 35 * $FreeBSD: stable/9/sys/fs/nullfs/null_vfsops.c 250978 2013-05-25 11:05:00Z kib $ |
| 36 */ 37 38/* 39 * Null Layer 40 * (See null_vnops.c for a description of what this does.) 41 */ 42 43#include <sys/param.h> --- 16 unchanged lines hidden (view full) --- 60static vfs_mount_t nullfs_mount; 61static vfs_quotactl_t nullfs_quotactl; 62static vfs_root_t nullfs_root; 63static vfs_sync_t nullfs_sync; 64static vfs_statfs_t nullfs_statfs; 65static vfs_unmount_t nullfs_unmount; 66static vfs_vget_t nullfs_vget; 67static vfs_extattrctl_t nullfs_extattrctl; | 36 */ 37 38/* 39 * Null Layer 40 * (See null_vnops.c for a description of what this does.) 41 */ 42 43#include <sys/param.h> --- 16 unchanged lines hidden (view full) --- 60static vfs_mount_t nullfs_mount; 61static vfs_quotactl_t nullfs_quotactl; 62static vfs_root_t nullfs_root; 63static vfs_sync_t nullfs_sync; 64static vfs_statfs_t nullfs_statfs; 65static vfs_unmount_t nullfs_unmount; 66static vfs_vget_t nullfs_vget; 67static vfs_extattrctl_t nullfs_extattrctl; |
| 68static vfs_reclaim_lowervp_t nullfs_reclaim_lowervp; | |
| 69 70/* 71 * Mount null layer 72 */ 73static int 74nullfs_mount(struct mount *mp) 75{ 76 int error = 0; --- 308 unchanged lines hidden (view full) --- 385static void 386nullfs_reclaim_lowervp(struct mount *mp, struct vnode *lowervp) 387{ 388 struct vnode *vp; 389 390 vp = null_hashget(mp, lowervp); 391 if (vp == NULL) 392 return; | 68 69/* 70 * Mount null layer 71 */ 72static int 73nullfs_mount(struct mount *mp) 74{ 75 int error = 0; --- 308 unchanged lines hidden (view full) --- 384static void 385nullfs_reclaim_lowervp(struct mount *mp, struct vnode *lowervp) 386{ 387 struct vnode *vp; 388 389 vp = null_hashget(mp, lowervp); 390 if (vp == NULL) 391 return; |
| 392 VTONULL(vp)->null_flags |= NULLV_NOUNLOCK; |
|
| 393 vgone(vp); | 393 vgone(vp); |
| 394 vn_lock(lowervp, LK_EXCLUSIVE | LK_RETRY); | 394 vput(vp); |
| 395} 396 | 395} 396 |
| 397static void 398nullfs_unlink_lowervp(struct mount *mp, struct vnode *lowervp) 399{ 400 struct vnode *vp; 401 struct null_node *xp; 402 403 vp = null_hashget(mp, lowervp); 404 if (vp == NULL) 405 return; 406 xp = VTONULL(vp); 407 xp->null_flags |= NULLV_DROP | NULLV_NOUNLOCK; 408 vhold(vp); 409 vunref(vp); 410 411 if (vp->v_usecount == 0) { 412 /* 413 * If vunref() dropped the last use reference on the 414 * nullfs vnode, it must be reclaimed, and its lock 415 * was split from the lower vnode lock. Need to do 416 * extra unlock before allowing the final vdrop() to 417 * free the vnode. 418 */ 419 KASSERT((vp->v_iflag & VI_DOOMED) != 0, 420 ("not reclaimed nullfs vnode %p", vp)); 421 VOP_UNLOCK(vp, 0); 422 } else { 423 /* 424 * Otherwise, the nullfs vnode still shares the lock 425 * with the lower vnode, and must not be unlocked. 426 * Also clear the NULLV_NOUNLOCK, the flag is not 427 * relevant for future reclamations. 428 */ 429 ASSERT_VOP_ELOCKED(vp, "unlink_lowervp"); 430 KASSERT((vp->v_iflag & VI_DOOMED) == 0, 431 ("reclaimed nullfs vnode %p", vp)); 432 xp->null_flags &= ~NULLV_NOUNLOCK; 433 } 434 vdrop(vp); 435} 436 |
|
| 397static struct vfsops null_vfsops = { 398 .vfs_extattrctl = nullfs_extattrctl, 399 .vfs_fhtovp = nullfs_fhtovp, 400 .vfs_init = nullfs_init, 401 .vfs_mount = nullfs_mount, 402 .vfs_quotactl = nullfs_quotactl, 403 .vfs_root = nullfs_root, 404 .vfs_statfs = nullfs_statfs, 405 .vfs_sync = nullfs_sync, 406 .vfs_uninit = nullfs_uninit, 407 .vfs_unmount = nullfs_unmount, 408 .vfs_vget = nullfs_vget, 409 .vfs_reclaim_lowervp = nullfs_reclaim_lowervp, | 437static struct vfsops null_vfsops = { 438 .vfs_extattrctl = nullfs_extattrctl, 439 .vfs_fhtovp = nullfs_fhtovp, 440 .vfs_init = nullfs_init, 441 .vfs_mount = nullfs_mount, 442 .vfs_quotactl = nullfs_quotactl, 443 .vfs_root = nullfs_root, 444 .vfs_statfs = nullfs_statfs, 445 .vfs_sync = nullfs_sync, 446 .vfs_uninit = nullfs_uninit, 447 .vfs_unmount = nullfs_unmount, 448 .vfs_vget = nullfs_vget, 449 .vfs_reclaim_lowervp = nullfs_reclaim_lowervp, |
| 450 .vfs_unlink_lowervp = nullfs_unlink_lowervp, |
|
| 410}; 411 412VFS_SET(null_vfsops, nullfs, VFCF_LOOPBACK | VFCF_JAIL); | 451}; 452 453VFS_SET(null_vfsops, nullfs, VFCF_LOOPBACK | VFCF_JAIL); |