Attachment 9446 Details for Bug 19331 – file.diff

[patch] file.diff

file.diff (text/plain), 2.20 KB, created by Vladimir N.Silyaev on 2000-06-16 12:40:01 UTC

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Creator: Vladimir N.Silyaev

Created: 2000-06-16 12:40:01 UTC

Size: 2.20 KB

patch

obsolete

>--- vfs_cache.c.orig	Mon Feb 14 01:09:01 2000
>+++ vfs_cache.c	Fri May 26 06:11:22 2000
>@@ -587,3 +587,97 @@
> 	return (error);
> }
> 
>+/*
>+ * Thus begins the fullpath magic.
>+ */
>+
>+#undef STATNODE
>+#define STATNODE(name)							\
>+	static u_int name;						\
>+	SYSCTL_INT(_vfs_cache, OID_AUTO, name, CTLFLAG_RD, &name, 0, "")
>+
>+static int disablefullpath;
>+SYSCTL_INT(_debug, OID_AUTO, disablefullpath, CTLFLAG_RW,
>+    &disablefullpath, 0, "");
>+
>+STATNODE(numfullpathcalls);
>+STATNODE(numfullpathfail1);
>+STATNODE(numfullpathfail2);
>+STATNODE(numfullpathfail3);
>+STATNODE(numfullpathfail4);
>+STATNODE(numfullpathfound);
>+
>+int
>+textvp_fullpath(struct proc *p, char **retbuf, char **retfreebuf) {
>+	char *bp, *buf;
>+	int i, slash_prefixed;
>+	struct filedesc *fdp;
>+	struct namecache *ncp;
>+	struct vnode *vp, *textvp;
>+
>+	numfullpathcalls++;
>+	if (disablefullpath)
>+		return (ENODEV);
>+	textvp = p->p_textvp;
>+	if (textvp == NULL)
>+		return (EINVAL);
>+	buf = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
>+	bp = buf + MAXPATHLEN - 1;
>+	*bp = '\0';
>+	fdp = p->p_fd;
>+	slash_prefixed = 0;
>+	for (vp = textvp; vp != fdp->fd_rdir && vp != rootvnode;) {
>+		if (vp->v_flag & VROOT) {
>+			if (vp->v_mount == NULL) {	/* forced unmount */
>+				free(buf, M_TEMP);
>+				return (EBADF);
>+			}
>+			vp = vp->v_mount->mnt_vnodecovered;
>+			continue;
>+		}
>+		if (vp != textvp && vp->v_dd->v_id != vp->v_ddid) {
>+			numfullpathfail1++;
>+			free(buf, M_TEMP);
>+			return (ENOTDIR);
>+		}
>+		ncp = TAILQ_FIRST(&vp->v_cache_dst);
>+		if (!ncp) {
>+			numfullpathfail2++;
>+			free(buf, M_TEMP);
>+			return (ENOENT);
>+		}
>+		if (vp != textvp && ncp->nc_dvp != vp->v_dd) {
>+			numfullpathfail3++;
>+			free(buf, M_TEMP);
>+			return (EBADF);
>+		}
>+		for (i = ncp->nc_nlen - 1; i >= 0; i--) {
>+			if (bp == buf) {
>+				numfullpathfail4++;
>+				free(buf, M_TEMP);
>+				return (ENOMEM);
>+			}
>+			*--bp = ncp->nc_name[i];
>+		}
>+		if (bp == buf) {
>+			numfullpathfail4++;
>+			free(buf, M_TEMP);
>+			return (ENOMEM);
>+		}
>+		*--bp = '/';
>+		slash_prefixed = 1;
>+		vp = ncp->nc_dvp;
>+	}
>+	if (!slash_prefixed) {
>+		if (bp == buf) {
>+			numfullpathfail4++;
>+			free(buf, M_TEMP);
>+			return (ENOMEM);
>+		}
>+		*--bp = '/';
>+	}
>+	numfullpathfound++;
>+	*retbuf = bp; 
>+	*retfreebuf = buf;
>+	return (0);
>+}

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Attachments on bug 19331: 9446