Date: Mon, 17 Aug 2009 10:02:31 +0000 (UTC) From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r196310 - in stable/8/sys: . amd64/include/xen cddl/contrib/opensolaris cddl/contrib/opensolaris/uts/common/fs/zfs contrib/dev/acpica contrib/pf dev/ata dev/cxgb dev/mfi dev/xen/netfron... Message-ID: <200908171002.n7HA2VPr058241@svn.freebsd.org>
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Author: pjd Date: Mon Aug 17 10:02:31 2009 New Revision: 196310 URL: http://svn.freebsd.org/changeset/base/196310 Log: MFC r196309: getcwd() (when __getcwd() fails) works by stating current directory, going up (..), calling readdir and looking for previous directory inode. In case of .zfs/ directory this doesn't work, because .zfs/ is hidden by default, so it won't be visible in readdir output. Fix this by implementing VPTOCNP for snapshot directories, so __getcwd() doesn't fail and getcwd() doesn't have to use readdir method. This fixes /bin/pwd from within .zfs/snapshot/<name>/. Suggested by: kib Approved by: re (rwatson) Modified: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) stable/8/sys/dev/ata/ (props changed) stable/8/sys/dev/cxgb/ (props changed) stable/8/sys/dev/mfi/ (props changed) stable/8/sys/dev/xen/netfront/ (props changed) stable/8/sys/dev/xen/xenpci/ (props changed) stable/8/sys/modules/dtrace/dtnfsclient/ (props changed) stable/8/sys/modules/ip6_mroute_mod/ (props changed) stable/8/sys/modules/ipmi/ipmi_linux/ (props changed) stable/8/sys/netinet/ipfw/ip_dummynet.c (props changed) stable/8/sys/netinet/ipfw/ip_fw2.c (props changed) stable/8/sys/netinet/ipfw/ip_fw_nat.c (props changed) stable/8/sys/netinet/ipfw/ip_fw_pfil.c (props changed) stable/8/sys/netipx/spx_reass.c (props changed) stable/8/sys/xen/evtchn.h (props changed) stable/8/sys/xen/hypervisor.h (props changed) stable/8/sys/xen/xen_intr.h (props changed) Modified: stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c ============================================================================== --- stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c Mon Aug 17 10:00:18 2009 (r196309) +++ stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c Mon Aug 17 10:02:31 2009 (r196310) @@ -1195,6 +1195,48 @@ zfsctl_snapshot_lookup(ap) return (error); } +static int +zfsctl_snapshot_vptocnp(struct vop_vptocnp_args *ap) +{ + zfsvfs_t *zfsvfs = ap->a_vp->v_vfsp->vfs_data; + vnode_t *dvp, *vp; + zfsctl_snapdir_t *sdp; + zfs_snapentry_t *sep; + int error; + + ASSERT(zfsvfs->z_ctldir != NULL); + error = zfsctl_root_lookup(zfsvfs->z_ctldir, "snapshot", &dvp, + NULL, 0, NULL, kcred, NULL, NULL, NULL); + if (error != 0) + return (error); + sdp = dvp->v_data; + + mutex_enter(&sdp->sd_lock); + sep = avl_first(&sdp->sd_snaps); + while (sep != NULL) { + vp = sep->se_root; + if (vp == ap->a_vp) + break; + sep = AVL_NEXT(&sdp->sd_snaps, sep); + } + if (sep == NULL) { + mutex_exit(&sdp->sd_lock); + error = ENOENT; + } else { + size_t len; + + len = strlen(sep->se_name); + *ap->a_buflen -= len; + bcopy(sep->se_name, ap->a_buf + *ap->a_buflen, len); + mutex_exit(&sdp->sd_lock); + vhold(dvp); + *ap->a_vpp = dvp; + } + VN_RELE(dvp); + + return (error); +} + /* * These VP's should never see the light of day. They should always * be covered. @@ -1206,6 +1248,7 @@ static struct vop_vector zfsctl_ops_snap .vop_reclaim = zfsctl_common_reclaim, .vop_getattr = zfsctl_snapshot_getattr, .vop_fid = zfsctl_snapshot_fid, + .vop_vptocnp = zfsctl_snapshot_vptocnp, }; int
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