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Date: Wed, 12 Feb 2014 19:21:38 +0800
From: Peng Tao <bergwolf@...il.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Peng Tao <bergwolf@...il.com>,
Andreas Dilger <andreas.dilger@...el.com>,
Oleg Drokin <oleg.drokin@...el.com>
Subject: [PATCH 1/3] staging/lustre/libcfs: remove user space code from kernel_user_comm.c
Cc: Andreas Dilger <andreas.dilger@...el.com>
Cc: Oleg Drokin <oleg.drokin@...el.com>
Signed-off-by: Peng Tao <bergwolf@...il.com>
---
.../lustre/lustre/libcfs/kernel_user_comm.c | 102 --------------------
1 files changed, 0 insertions(+), 102 deletions(-)
diff --git a/drivers/staging/lustre/lustre/libcfs/kernel_user_comm.c b/drivers/staging/lustre/lustre/libcfs/kernel_user_comm.c
index 7b2c315..b6ddc99 100644
--- a/drivers/staging/lustre/lustre/libcfs/kernel_user_comm.c
+++ b/drivers/staging/lustre/lustre/libcfs/kernel_user_comm.c
@@ -44,106 +44,6 @@
#include <linux/libcfs/libcfs.h>
-#ifdef LUSTRE_UTILS
-/* This is the userspace side. */
-
-/** Start the userspace side of a KUC pipe.
- * @param link Private descriptor for pipe/socket.
- * @param groups KUC broadcast group to listen to
- * (can be null for unicast to this pid)
- */
-int libcfs_ukuc_start(lustre_kernelcomm *link, int group)
-{
- int pfd[2];
-
- if (pipe(pfd) < 0)
- return -errno;
-
- memset(link, 0, sizeof(*link));
- link->lk_rfd = pfd[0];
- link->lk_wfd = pfd[1];
- link->lk_group = group;
- link->lk_uid = getpid();
- return 0;
-}
-
-int libcfs_ukuc_stop(lustre_kernelcomm *link)
-{
- if (link->lk_wfd > 0)
- close(link->lk_wfd);
- return close(link->lk_rfd);
-}
-
-#define lhsz sizeof(*kuch)
-
-/** Read a message from the link.
- * Allocates memory, returns handle
- *
- * @param link Private descriptor for pipe/socket.
- * @param buf Buffer to read into, must include size for kuc_hdr
- * @param maxsize Maximum message size allowed
- * @param transport Only listen to messages on this transport
- * (and the generic transport)
- */
-int libcfs_ukuc_msg_get(lustre_kernelcomm *link, char *buf, int maxsize,
- int transport)
-{
- struct kuc_hdr *kuch;
- int rc = 0;
-
- memset(buf, 0, maxsize);
-
- CDEBUG(D_KUC, "Waiting for message from kernel on fd %d\n",
- link->lk_rfd);
-
- while (1) {
- /* Read header first to get message size */
- rc = read(link->lk_rfd, buf, lhsz);
- if (rc <= 0) {
- rc = -errno;
- break;
- }
- kuch = (struct kuc_hdr *)buf;
-
- CDEBUG(D_KUC, "Received message mg=%x t=%d m=%d l=%d\n",
- kuch->kuc_magic, kuch->kuc_transport, kuch->kuc_msgtype,
- kuch->kuc_msglen);
-
- if (kuch->kuc_magic != KUC_MAGIC) {
- CERROR("bad message magic %x != %x\n",
- kuch->kuc_magic, KUC_MAGIC);
- rc = -EPROTO;
- break;
- }
-
- if (kuch->kuc_msglen > maxsize) {
- rc = -EMSGSIZE;
- break;
- }
-
- /* Read payload */
- rc = read(link->lk_rfd, buf + lhsz, kuch->kuc_msglen - lhsz);
- if (rc < 0) {
- rc = -errno;
- break;
- }
- if (rc < (kuch->kuc_msglen - lhsz)) {
- CERROR("short read: got %d of %d bytes\n",
- rc, kuch->kuc_msglen);
- rc = -EPROTO;
- break;
- }
-
- if (kuch->kuc_transport == transport ||
- kuch->kuc_transport == KUC_TRANSPORT_GENERIC) {
- return 0;
- }
- /* Drop messages for other transports */
- }
- return rc;
-}
-
-#else /* LUSTRE_UTILS */
/* This is the kernel side (liblustre as well). */
/**
@@ -338,5 +238,3 @@ int libcfs_kkuc_group_foreach(int group, libcfs_kkuc_cb_t cb_func,
return rc;
}
EXPORT_SYMBOL(libcfs_kkuc_group_foreach);
-
-#endif /* LUSTRE_UTILS */
--
1.7.7.6
--
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