Use shared vnode locks when invoking VOP_READDIR().

MFC after:	1 month

3 files changed, 4 insertions, 4 deletions

diff --git a/sys/compat/linux/linux_file.c b/sys/compat/linux/linux_file.c
index 3f19b4c..b368429 100644
--- a/sys/compat/linux/linux_file.c
+++ b/sys/compat/linux/linux_file.c
@@ -372,7 +372,7 @@ getdents_common(struct thread *td, struct linux_getdents64_args *args,
 	buflen = min(buflen, MAXBSIZE);
 	buf = malloc(buflen, M_TEMP, M_WAITOK);
 	lbuf = malloc(LINUX_MAXRECLEN, M_TEMP, M_WAITOK | M_ZERO);
-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
+	vn_lock(vp, LK_SHARED | LK_RETRY);
 
 again:
 	aiov.iov_base = buf;
diff --git a/sys/compat/linux/linux_getcwd.c b/sys/compat/linux/linux_getcwd.c
index 2ab69c5..6474d1e 100644
--- a/sys/compat/linux/linux_getcwd.c
+++ b/sys/compat/linux/linux_getcwd.c
@@ -163,7 +163,7 @@ linux_getcwd_scandir(lvpp, uvpp, bpp, bufp, td)
 	cn.cn_nameptr = "..";
 	cn.cn_namelen = 2;
 	cn.cn_consume = 0;
-	cn.cn_lkflags = LK_EXCLUSIVE;
+	cn.cn_lkflags = LK_SHARED;
 	
 	/*
 	 * At this point, lvp is locked and will be unlocked by the lookup.
diff --git a/sys/compat/svr4/svr4_misc.c b/sys/compat/svr4/svr4_misc.c
index bb1bf3d..ad56a11 100644
--- a/sys/compat/svr4/svr4_misc.c
+++ b/sys/compat/svr4/svr4_misc.c
@@ -278,7 +278,7 @@ svr4_sys_getdents64(td, uap)
 	buflen = max(DIRBLKSIZ, nbytes);
 	buflen = min(buflen, MAXBSIZE);
 	buf = malloc(buflen, M_TEMP, M_WAITOK);
-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
+	vn_lock(vp, LK_SHARED | LK_RETRY);
 again:
 	aiov.iov_base = buf;
 	aiov.iov_len = buflen;
@@ -447,7 +447,7 @@ svr4_sys_getdents(td, uap)
 
 	buflen = min(MAXBSIZE, uap->nbytes);
 	buf = malloc(buflen, M_TEMP, M_WAITOK);
-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
+	vn_lock(vp, LK_SHARED | LK_RETRY);
 	off = fp->f_offset;
 again:
 	aiov.iov_base = buf;