Date: Sun, 1 Dec 2019 15:59:04 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r355262 - stable/11/sys/fs/tmpfs Message-ID: <201912011559.xB1Fx4nP050894@repo.freebsd.org>
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Author: kib Date: Sun Dec 1 15:59:04 2019 New Revision: 355262 URL: https://svnweb.freebsd.org/changeset/base/355262 Log: MFC r355061: tmpfs: resolve deadlock between rename and unmount. Modified: stable/11/sys/fs/tmpfs/tmpfs_vnops.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/fs/tmpfs/tmpfs_vnops.c ============================================================================== --- stable/11/sys/fs/tmpfs/tmpfs_vnops.c Sun Dec 1 15:29:48 2019 (r355261) +++ stable/11/sys/fs/tmpfs/tmpfs_vnops.c Sun Dec 1 15:59:04 2019 (r355262) @@ -786,7 +786,6 @@ tmpfs_rename(struct vop_rename_args *v) struct vnode *tdvp = v->a_tdvp; struct vnode *tvp = v->a_tvp; struct componentname *tcnp = v->a_tcnp; - struct mount *mp = NULL; char *newname; struct tmpfs_dirent *de; struct tmpfs_mount *tmp; @@ -823,18 +822,10 @@ tmpfs_rename(struct vop_rename_args *v) */ if (fdvp != tdvp && fdvp != tvp) { if (vn_lock(fdvp, LK_EXCLUSIVE | LK_NOWAIT) != 0) { - mp = tdvp->v_mount; - error = vfs_busy(mp, 0); - if (error != 0) { - mp = NULL; - goto out; - } error = tmpfs_rename_relock(fdvp, &fvp, tdvp, &tvp, fcnp, tcnp); - if (error != 0) { - vfs_unbusy(mp); + if (error != 0) return (error); - } ASSERT_VOP_ELOCKED(fdvp, "tmpfs_rename: fdvp not locked"); ASSERT_VOP_ELOCKED(tdvp, @@ -1077,9 +1068,6 @@ out: /* Release source nodes. */ vrele(fdvp); vrele(fvp); - - if (mp != NULL) - vfs_unbusy(mp); return (error); }
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