From: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Date: Thu, 28 Mar 2013 17:54:47 +0000 (+0400)
Subject: LU-3106 ofd: create additional symlinks to osd
X-Git-Tag: 2.3.65~32
X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=commitdiff_plain;h=498bc06f24720234b43d3b98f02fedd0688ab60f;hp=2d5f51b92f6eb45e9fd6ae57f8d9ec349049ea14

LU-3106 ofd: create additional symlinks to osd

to preserve compatibility with obdfilter stats:
read_cache_enable, readcache_max_filesize and
writethrough_cache_enable are accessible via
/proc/.../obdfilter/.. again.

Signed-off-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Change-Id: Iee5315a58c6434f4633692a80f57e68890f5c415
Reviewed-on: http://review.whamcloud.com/5873
Reviewed-by: John Hammond <johnlockwoodhammond@gmail.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
---

diff --git a/lustre/ofd/ofd_dev.c b/lustre/ofd/ofd_dev.c
index 29206b3..4c2fec3 100644
--- a/lustre/ofd/ofd_dev.c
+++ b/lustre/ofd/ofd_dev.c
@@ -472,18 +472,38 @@ static void ofd_procfs_add_brw_stats_symlink(struct ofd_device *ofd)
 	if (osd_dir == NULL)
 		return;
 
-	if (lprocfs_srch(osd_dir, "brw_stats") == NULL)
-		return;
-
-	lprocfs_add_symlink("brw_stats", obd->obd_proc_entry,
-			    "../../%s/%s/brw_stats",
-			    osd_root->name, osd_dir->name);
+	if (lprocfs_srch(osd_dir, "brw_stats") != NULL)
+		lprocfs_add_symlink("brw_stats", obd->obd_proc_entry,
+				    "../../%s/%s/brw_stats",
+				    osd_root->name, osd_dir->name);
+
+	if (lprocfs_srch(osd_dir, "read_cache_enable") != NULL)
+		lprocfs_add_symlink("read_cache_enable", obd->obd_proc_entry,
+				    "../../%s/%s/read_cache_enable",
+				    osd_root->name, osd_dir->name);
+
+	if (lprocfs_srch(osd_dir, "readcache_max_filesize") != NULL)
+		lprocfs_add_symlink("readcache_max_filesize",
+				    obd->obd_proc_entry,
+				    "../../%s/%s/readcache_max_filesize",
+				    osd_root->name, osd_dir->name);
+
+	if (lprocfs_srch(osd_dir, "writethrough_cache_enable") != NULL)
+		lprocfs_add_symlink("writethrough_cache_enable",
+				    obd->obd_proc_entry,
+				    "../../%s/%s/writethrough_cache_enable",
+				    osd_root->name, osd_dir->name);
 }
 
 static void ofd_procfs_fini(struct ofd_device *ofd)
 {
 	struct obd_device *obd = ofd_obd(ofd);
 
+	lprocfs_remove_proc_entry("writethrough_cache_enable",
+				  obd->obd_proc_entry);
+	lprocfs_remove_proc_entry("readcache_max_filesize",
+				  obd->obd_proc_entry);
+	lprocfs_remove_proc_entry("read_cache_enable", obd->obd_proc_entry);
 	lprocfs_remove_proc_entry("brw_stats", obd->obd_proc_entry);
 	lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
 	lprocfs_free_per_client_stats(obd);