From b8a0753a3bd2953ef6c24ddd18d15786808c2066 Mon Sep 17 00:00:00 2001
From: Vladimir Saveliev <Vladimir.Saveliev@sun.com>
Date: Fri, 16 Jul 2010 17:51:18 +0400
Subject: [PATCH] b=13698 llapi_get_version

this uses OBD_GET_VERSION ioctl to obtain lustre version

i=andreas.dilger
---
 lustre/include/lustre/liblustreapi.h |  1 +
 lustre/utils/liblustreapi.c          | 28 ++++++++++++++++++++++++++++
 lustre/utils/obd.c                   | 21 +++++++--------------
 3 files changed, 36 insertions(+), 14 deletions(-)

diff --git a/lustre/include/lustre/liblustreapi.h b/lustre/include/lustre/liblustreapi.h
index a48887d..2c035b2 100644
--- a/lustre/include/lustre/liblustreapi.h
+++ b/lustre/include/lustre/liblustreapi.h
@@ -204,6 +204,7 @@ extern int llapi_ls(int argc, char *argv[]);
 extern int llapi_fid2path(const char *device, const char *fidstr, char *path,
                           int pathlen, long long *recno, int *linkno);
 extern int llapi_path2fid(const char *path, lustre_fid *fid);
+extern int llapi_get_version(char *buffer, int buffer_size, char **version);
 
 /* Changelog interface.  priv is private state, managed internally
    by these functions */
diff --git a/lustre/utils/liblustreapi.c b/lustre/utils/liblustreapi.c
index 7631b51..0855805 100644
--- a/lustre/utils/liblustreapi.c
+++ b/lustre/utils/liblustreapi.c
@@ -3270,3 +3270,31 @@ int llapi_get_connect_flags(const char *mnt, __u64 *flags)
                           "ioctl on %s for getting connect flags failed", mnt);
         return rc;
 }
+
+int llapi_get_version(char *buffer, int buffer_size,
+                      char **version)
+{
+        int rc;
+        int fd;
+        struct obd_ioctl_data *data = (struct obd_ioctl_data *)buffer;
+
+        fd = open(OBD_DEV_PATH, O_RDONLY);
+        if (fd == -1)
+                return -errno;
+
+        memset(buffer, 0, buffer_size);
+        data->ioc_version = OBD_IOCTL_VERSION;
+        data->ioc_inllen1 = buffer_size - cfs_size_round(sizeof(*data));
+        data->ioc_inlbuf1 = buffer + cfs_size_round(sizeof(*data));
+        data->ioc_len = obd_ioctl_packlen(data);
+
+        rc = ioctl(fd, OBD_GET_VERSION, buffer);
+        if (rc == -1) {
+                rc = errno;
+                close(fd);
+                return -rc;
+        }
+        close(fd);
+        *version = data->ioc_bulk;
+        return 0;
+}
diff --git a/lustre/utils/obd.c b/lustre/utils/obd.c
index 619c96b..b0e0eb8 100644
--- a/lustre/utils/obd.c
+++ b/lustre/utils/obd.c
@@ -900,25 +900,18 @@ int jt_obd_abort_recovery(int argc, char **argv)
 int jt_get_version(int argc, char **argv)
 {
         int rc;
-        char rawbuf[MAX_IOC_BUFLEN], *buf = rawbuf;
-        struct obd_ioctl_data *data = (struct obd_ioctl_data *)buf;
+        char rawbuf[MAX_IOC_BUFLEN];
+        char *version;
 
         if (argc != 1)
                 return CMD_HELP;
 
-        memset(buf, 0, sizeof(rawbuf));
-        data->ioc_version = OBD_IOCTL_VERSION;
-        data->ioc_inllen1 = sizeof(rawbuf) - cfs_size_round(sizeof(*data));
-        data->ioc_inlbuf1 = buf + cfs_size_round(sizeof(*data));
-        data->ioc_len = obd_ioctl_packlen(data);
-
-        rc = l2_ioctl(OBD_DEV_ID, OBD_GET_VERSION, buf);
-        if (rc < 0)
+        rc = llapi_get_version(rawbuf, MAX_IOC_BUFLEN, &version);
+        if (rc)
                 fprintf(stderr, "error: %s: %s\n", jt_cmdname(argv[0]),
-                        strerror(rc = errno));
-        else {
-                printf("Lustre version: %s\n", data->ioc_bulk);
-        }
+                        strerror(-rc));
+        else
+                printf("Lustre version: %s\n", version);
 
         printf("lctl   version: %s\n", BUILD_VERSION);
         return rc;
-- 
1.8.3.1