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authorSteve French <stfrench@microsoft.com>2018-10-19 17:14:32 -0500
committerSteve French <stfrench@microsoft.com>2018-10-23 21:16:06 -0500
commitfae8044c03c3c03e06b384a6122b78a6c3a0b6a7 (patch)
tree555b3632da5b6e5e529fa14ebbc7740b4a5a98f3 /fs/cifs/file.c
parent8d8b26e58432cb2840048b9f8aea286be6f75de5 (diff)
downloadlinux-fae8044c03c3c03e06b384a6122b78a6c3a0b6a7.tar.bz2
smb3: show number of current open files in /proc/fs/cifs/Stats
To allow better debugging (for example applications with handle leaks, or complex reconnect scenarios) display the number of open files (on the client) and number of open server file handles for each tcon in /proc/fs/cifs/Stats. Note that open files on server is one larger than local due to handle caching (in this case of the root of the share). In this example there are two local open files, and three (two file and one directory handle) open on the server. Sample output: $ cat /proc/fs/cifs/Stats Resources in use CIFS Session: 1 Share (unique mount targets): 2 SMB Request/Response Buffer: 1 Pool size: 5 SMB Small Req/Resp Buffer: 1 Pool size: 30 Operations (MIDs): 0 0 session 0 share reconnects Total vfs operations: 36 maximum at one time: 2 1) \\localhost\test SMBs: 69 Bytes read: 27 Bytes written: 0 Open files: 2 total (local), 3 open on server TreeConnects: 1 total 0 failed TreeDisconnects: 0 total 0 failed Creates: 19 total 0 failed Closes: 16 total 0 failed ... Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/file.c')
-rw-r--r--fs/cifs/file.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 84477e995246..c620d4b5d5d4 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -334,6 +334,7 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
server->ops->set_fid(cfile, fid, oplock);
list_add(&cfile->tlist, &tcon->openFileList);
+ atomic_inc(&tcon->num_local_opens);
/* if readable file instance put first in list*/
if (file->f_mode & FMODE_READ)
@@ -395,6 +396,7 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
/* remove it from the lists */
list_del(&cifs_file->flist);
list_del(&cifs_file->tlist);
+ atomic_dec(&tcon->num_local_opens);
if (list_empty(&cifsi->openFileList)) {
cifs_dbg(FYI, "closing last open instance for inode %p\n",