From 696f6d3ffc3e01fc0a8d5d9a7740d52bf2b6a7e5 Mon Sep 17 00:00:00 2001
From: bobijam <bobijam>
Date: Tue, 23 Sep 2008 02:45:40 +0000
Subject: [PATCH] Branch b1_8_gate b=15966 o=komal.nawandar i=adilger
 i=zhenyu.xu (bobijam)

Description: Re-disable certain /proc logging
Details    : Enable and disable client's offset_stats, extents_stats and
             extents_stats_per_process stats logging on the fly.b=15966
---
 lustre/llite/lproc_llite.c | 50 +++++++++++++++++++++++++++++++++++++---------
 1 file changed, 41 insertions(+), 9 deletions(-)

diff --git a/lustre/llite/lproc_llite.c b/lustre/llite/lproc_llite.c
index 3730392..596098d 100644
--- a/lustre/llite/lproc_llite.c
+++ b/lustre/llite/lproc_llite.c
@@ -1119,8 +1119,9 @@ static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
         do_gettimeofday(&now);
 
         if (!sbi->ll_rw_stats_on) {
-                seq_printf(seq, "Disabled\n"
-                                "Write anything in this file to activate\n");
+                seq_printf(seq, "disabled\n"
+                                "write anything in this file to activate, "
+                                "then 0 or \"[D/d]isabled\" to deactivate\n");
                 return 0;
         }
         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
@@ -1149,8 +1150,18 @@ static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
         struct ll_sb_info *sbi = seq->private;
         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
         int i;
+        int value = 1, rc = 0;
+
+        rc = lprocfs_write_helper(buf, len, &value);
+        if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
+                       strcmp(buf, "Disabled") == 0))
+                value = 0;
+
+        if (value == 0)
+                sbi->ll_rw_stats_on = 0;
+        else
+                sbi->ll_rw_stats_on = 1;
 
-        sbi->ll_rw_stats_on = 1;
         spin_lock(&sbi->ll_pp_extent_lock);
         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
                 io_extents->pp_extents[i].pid = 0;
@@ -1172,8 +1183,9 @@ static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
         do_gettimeofday(&now);
 
         if (!sbi->ll_rw_stats_on) {
-                seq_printf(seq, "Disabled\n"
-                                "Write anything in this file to activate\n");
+                seq_printf(seq, "disabled\n"
+                                "write anything in this file to activate, "
+                                "then 0 or \"[D/d]isabled\" to deactivate\n");
                 return 0;
         }
         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
@@ -1197,8 +1209,17 @@ static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
         struct ll_sb_info *sbi = seq->private;
         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
         int i;
+        int value = 1, rc = 0;
+
+        rc = lprocfs_write_helper(buf, len, &value);
+        if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
+                       strcmp(buf, "Disabled") == 0))
+                value = 0;
 
-        sbi->ll_rw_stats_on = 1;
+        if (value == 0)
+                sbi->ll_rw_stats_on = 0;
+        else
+                sbi->ll_rw_stats_on = 1;
         spin_lock(&sbi->ll_pp_extent_lock);
         for(i = 0; i <= LL_PROCESS_HIST_MAX; i++)
         {
@@ -1330,8 +1351,9 @@ static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
         do_gettimeofday(&now);
 
         if (!sbi->ll_rw_stats_on) {
-                seq_printf(seq, "Disabled\n"
-                                "Write anything in this file to activate\n");
+                seq_printf(seq, "disabled\n"
+                                "write anything in this file to activate, "
+                                "then 0 or \"[D/d]isabled\" to deactivate\n");
                 return 0;
         }
         spin_lock(&sbi->ll_process_lock);
@@ -1380,8 +1402,18 @@ static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
         struct ll_sb_info *sbi = seq->private;
         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
+        int value = 1, rc = 0;
+
+        rc = lprocfs_write_helper(buf, len, &value);
 
-        sbi->ll_rw_stats_on = 1;
+        if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
+                           strcmp(buf, "Disabled") == 0))
+                value = 0;
+
+        if (value == 0)
+                sbi->ll_rw_stats_on = 0;
+        else
+                sbi->ll_rw_stats_on = 1;
 
         spin_lock(&sbi->ll_process_lock);
         sbi->ll_offset_process_count = 0;
-- 
1.8.3.1