From: Steve French stfrench@microsoft.com
[ Upstream commit c281bc0c7412308c7ec0888904f7c99353da4796 ]
echo 0 > /proc/fs/cifs/Stats is supposed to reset the stats but there were four (see example below) that were not reset (bytes read and witten, total vfs ops and max ops at one time).
... 0 session 0 share reconnects Total vfs operations: 100 maximum at one time: 2
1) \localhost\test SMBs: 0 Bytes read: 502092 Bytes written: 31457286 TreeConnects: 0 total 0 failed TreeDisconnects: 0 total 0 failed ...
This patch fixes cifs_stats_proc_write to properly reset those four.
Signed-off-by: Steve French stfrench@microsoft.com Reviewed-by: Aurelien Aptel aaptel@suse.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- fs/cifs/cifs_debug.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index bfe999505815..6107077169bf 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -367,6 +367,10 @@ static ssize_t cifs_stats_proc_write(struct file *file, atomic_set(&totBufAllocCount, 0); atomic_set(&totSmBufAllocCount, 0); #endif /* CONFIG_CIFS_STATS2 */ + spin_lock(&GlobalMid_Lock); + GlobalMaxActiveXid = 0; + GlobalCurrentXid = 0; + spin_unlock(&GlobalMid_Lock); spin_lock(&cifs_tcp_ses_lock); list_for_each(tmp1, &cifs_tcp_ses_list) { server = list_entry(tmp1, struct TCP_Server_Info, @@ -379,6 +383,10 @@ static ssize_t cifs_stats_proc_write(struct file *file, struct cifs_tcon, tcon_list); atomic_set(&tcon->num_smbs_sent, 0); + spin_lock(&tcon->stat_lock); + tcon->bytes_read = 0; + tcon->bytes_written = 0; + spin_unlock(&tcon->stat_lock); if (server->ops->clear_stats) server->ops->clear_stats(tcon); }