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The generated VCALL always uses the first vp which in the case of /link/
might not be handled by the same FS as the directory (e.g. special device files)...so it must be special-cased. This bug is seen when doing "ln /dev/console /dev/foo" or equivilent and first appeared after I fixed the argument order of VOP_LINK. YUCK! There really needs to be a way of specifying what vp to use in the VCALL; doing this could fix the strategy and bwrite special-cases, too.
This commit is contained in:
David Greenman
parent
e9a9607fbb
commit
083c109df6
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=9430
@ -32,7 +32,7 @@
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# SUCH DAMAGE.
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#
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# @(#)vnode_if.sh 8.1 (Berkeley) 6/10/93
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# $Id$
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# $Id: vnode_if.sh,v 1.2 1994/08/02 07:43:34 davidg Exp $
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#
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# Script to produce VFS front-end sugar.
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@ -372,6 +372,27 @@ static inline int VOP_BWRITE(bp)
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a.a_bp = bp;
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return (VCALL((bp)->b_vp, VOFFSET(vop_bwrite), &a));
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}
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struct vop_link_args {
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struct vnodeop_desc *a_desc;
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struct vnode *a_vp;
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struct vnode *a_tdvp;
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struct componentname *a_cnp;
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};
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extern struct vnodeop_desc vop_link_desc;
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static inline int VOP_LINK(vp, tdvp, cnp)
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struct vnode *vp;
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struct vnode *tdvp;
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struct componentname *cnp;
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{
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struct vop_link_args a;
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a.a_desc = VDESC(vop_link);
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a.a_vp = vp;
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a.a_tdvp = tdvp;
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a.a_cnp = cnp;
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return (VCALL(tdvp, VOFFSET(vop_link), &a));
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}
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END_OF_SPECIAL_CASES
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cat << END_OF_SPECIAL_CASES >> $CFILE
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@ -403,6 +424,22 @@ struct vnodeop_desc vop_bwrite_desc = {
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VDESC_NO_OFFSET,
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NULL,
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};
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int vop_link_vp_offsets[] = {
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VOPARG_OFFSETOF(struct vop_link_args,a_vp),
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VOPARG_OFFSETOF(struct vop_link_args,a_tdvp),
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VDESC_NO_OFFSET
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};
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struct vnodeop_desc vop_link_desc = {
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0,
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"vop_link",
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VDESC_VP1_WILLRELE,
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vop_link_vp_offsets,
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VDESC_NO_OFFSET,
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VDESC_NO_OFFSET,
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VDESC_NO_OFFSET,
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VOPARG_OFFSETOF(struct vop_link_args,a_cnp),
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NULL,
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};
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END_OF_SPECIAL_CASES
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# Add the vfs_op_descs array to the C file.
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@ -412,6 +449,7 @@ $AWK '
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printf("\t&vop_default_desc, /* MUST BE FIRST */\n");
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printf("\t&vop_strategy_desc, /* XXX: SPECIAL CASE */\n");
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printf("\t&vop_bwrite_desc, /* XXX: SPECIAL CASE */\n");
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printf("\t&vop_link_desc, /* XXX: SPECIAL CASE */\n");
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}
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END {
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printf("\tNULL\n};\n");
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@ -32,7 +32,7 @@
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# SUCH DAMAGE.
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#
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# @(#)vnode_if.sh 8.1 (Berkeley) 6/10/93
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# $Id$
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# $Id: vnode_if.sh,v 1.2 1994/08/02 07:43:34 davidg Exp $
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#
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# Script to produce VFS front-end sugar.
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@ -372,6 +372,27 @@ static inline int VOP_BWRITE(bp)
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a.a_bp = bp;
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return (VCALL((bp)->b_vp, VOFFSET(vop_bwrite), &a));
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}
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struct vop_link_args {
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struct vnodeop_desc *a_desc;
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struct vnode *a_vp;
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struct vnode *a_tdvp;
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struct componentname *a_cnp;
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};
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extern struct vnodeop_desc vop_link_desc;
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static inline int VOP_LINK(vp, tdvp, cnp)
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struct vnode *vp;
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struct vnode *tdvp;
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struct componentname *cnp;
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{
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struct vop_link_args a;
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a.a_desc = VDESC(vop_link);
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a.a_vp = vp;
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a.a_tdvp = tdvp;
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a.a_cnp = cnp;
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return (VCALL(tdvp, VOFFSET(vop_link), &a));
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}
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END_OF_SPECIAL_CASES
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cat << END_OF_SPECIAL_CASES >> $CFILE
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@ -403,6 +424,22 @@ struct vnodeop_desc vop_bwrite_desc = {
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VDESC_NO_OFFSET,
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NULL,
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};
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int vop_link_vp_offsets[] = {
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VOPARG_OFFSETOF(struct vop_link_args,a_vp),
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VOPARG_OFFSETOF(struct vop_link_args,a_tdvp),
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VDESC_NO_OFFSET
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};
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struct vnodeop_desc vop_link_desc = {
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0,
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"vop_link",
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VDESC_VP1_WILLRELE,
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vop_link_vp_offsets,
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VDESC_NO_OFFSET,
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VDESC_NO_OFFSET,
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VDESC_NO_OFFSET,
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VOPARG_OFFSETOF(struct vop_link_args,a_cnp),
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NULL,
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};
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END_OF_SPECIAL_CASES
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# Add the vfs_op_descs array to the C file.
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@ -412,6 +449,7 @@ $AWK '
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printf("\t&vop_default_desc, /* MUST BE FIRST */\n");
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printf("\t&vop_strategy_desc, /* XXX: SPECIAL CASE */\n");
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printf("\t&vop_bwrite_desc, /* XXX: SPECIAL CASE */\n");
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printf("\t&vop_link_desc, /* XXX: SPECIAL CASE */\n");
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}
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END {
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printf("\tNULL\n};\n");
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@ -31,7 +31,7 @@
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# SUCH DAMAGE.
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#
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# @(#)vnode_if.src 8.3 (Berkeley) 2/3/94
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# $Id: vnode_if.src,v 1.3 1994/09/28 16:45:12 dfr Exp $
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# $Id: vnode_if.src,v 1.4 1995/06/28 07:06:41 davidg Exp $
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#
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vop_lookup {
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IN struct vnode *dvp;
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@ -148,11 +148,15 @@ vop_remove {
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IN struct componentname *cnp;
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};
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vop_link {
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IN struct vnode *vp;
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IN WILLRELE struct vnode *tdvp;
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IN struct componentname *cnp;
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};
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# Gack. The generated VCALL uses the first vp which might
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# not be handled by the same FS as the directory (e.g. special
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# device files)...so it's special-cased.
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#
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#vop_link {
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# IN struct vnode *vp;
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# IN WILLRELE struct vnode *tdvp;
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# IN struct componentname *cnp;
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#};
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vop_rename {
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IN WILLRELE struct vnode *fdvp;
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@ -32,7 +32,7 @@
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# SUCH DAMAGE.
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#
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# @(#)vnode_if.sh 8.1 (Berkeley) 6/10/93
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# $Id$
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# $Id: vnode_if.sh,v 1.2 1994/08/02 07:43:34 davidg Exp $
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#
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# Script to produce VFS front-end sugar.
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@ -372,6 +372,27 @@ static inline int VOP_BWRITE(bp)
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a.a_bp = bp;
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return (VCALL((bp)->b_vp, VOFFSET(vop_bwrite), &a));
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}
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struct vop_link_args {
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struct vnodeop_desc *a_desc;
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struct vnode *a_vp;
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struct vnode *a_tdvp;
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struct componentname *a_cnp;
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};
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extern struct vnodeop_desc vop_link_desc;
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static inline int VOP_LINK(vp, tdvp, cnp)
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struct vnode *vp;
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struct vnode *tdvp;
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struct componentname *cnp;
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{
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struct vop_link_args a;
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a.a_desc = VDESC(vop_link);
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a.a_vp = vp;
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a.a_tdvp = tdvp;
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a.a_cnp = cnp;
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return (VCALL(tdvp, VOFFSET(vop_link), &a));
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}
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END_OF_SPECIAL_CASES
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cat << END_OF_SPECIAL_CASES >> $CFILE
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@ -403,6 +424,22 @@ struct vnodeop_desc vop_bwrite_desc = {
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VDESC_NO_OFFSET,
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NULL,
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};
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int vop_link_vp_offsets[] = {
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VOPARG_OFFSETOF(struct vop_link_args,a_vp),
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VOPARG_OFFSETOF(struct vop_link_args,a_tdvp),
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VDESC_NO_OFFSET
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};
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struct vnodeop_desc vop_link_desc = {
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0,
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"vop_link",
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VDESC_VP1_WILLRELE,
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vop_link_vp_offsets,
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VDESC_NO_OFFSET,
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VDESC_NO_OFFSET,
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VDESC_NO_OFFSET,
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VOPARG_OFFSETOF(struct vop_link_args,a_cnp),
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NULL,
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};
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END_OF_SPECIAL_CASES
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# Add the vfs_op_descs array to the C file.
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@ -412,6 +449,7 @@ $AWK '
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printf("\t&vop_default_desc, /* MUST BE FIRST */\n");
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printf("\t&vop_strategy_desc, /* XXX: SPECIAL CASE */\n");
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printf("\t&vop_bwrite_desc, /* XXX: SPECIAL CASE */\n");
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printf("\t&vop_link_desc, /* XXX: SPECIAL CASE */\n");
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}
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END {
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printf("\tNULL\n};\n");
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