cifs: append path to open_enter trace event

We do not dump the file path for smb3_open_enter ftrace
calls, which is a severe handicap while debugging
using ftrace evens. This change adds that info.

Unfortunately, we're not updating the path in open params
in many places; which I had to do as a part of this change.
SMB2_open gets path in utf16 format, but it's easier of
path is supplied as char pointer in oparms.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/cached_dir.c

@@ -184,6 +184,7 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
 
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = path,
 		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_FILE),
 		.desired_access = FILE_READ_ATTRIBUTES,
 		.disposition = FILE_OPEN,

fs/cifs/link.c

@@ -360,6 +360,7 @@ smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
 		.cifs_sb = cifs_sb,
+		.path = path,
 		.desired_access = GENERIC_READ,
 		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
 		.disposition = FILE_OPEN,
@@ -427,6 +428,7 @@ smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
 		.cifs_sb = cifs_sb,
+		.path = path,
 		.desired_access = GENERIC_WRITE,
 		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
 		.disposition = FILE_CREATE,

fs/cifs/smb2inode.c

@@ -107,6 +107,7 @@ static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 
 	vars->oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = full_path,
 		.desired_access = desired_access,
 		.disposition = create_disposition,
 		.create_options = cifs_create_options(cifs_sb, create_options),

fs/cifs/smb2ops.c

@@ -745,6 +745,7 @@ smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = "",
 		.desired_access = FILE_READ_ATTRIBUTES,
 		.disposition = FILE_OPEN,
 		.create_options = cifs_create_options(cifs_sb, 0),
@@ -788,6 +789,7 @@ smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = "",
 		.desired_access = FILE_READ_ATTRIBUTES,
 		.disposition = FILE_OPEN,
 		.create_options = cifs_create_options(cifs_sb, 0),
@@ -835,6 +837,7 @@ smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = full_path,
 		.desired_access = FILE_READ_ATTRIBUTES,
 		.disposition = FILE_OPEN,
 		.create_options = cifs_create_options(cifs_sb, 0),
@@ -1119,6 +1122,7 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = path,
 		.desired_access = FILE_WRITE_EA,
 		.disposition = FILE_OPEN,
 		.create_options = cifs_create_options(cifs_sb, 0),
@@ -2110,6 +2114,7 @@ smb3_notify(const unsigned int xid, struct file *pfile,
 	tcon = cifs_sb_master_tcon(cifs_sb);
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = path,
 		.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
 		.disposition = FILE_OPEN,
 		.create_options = cifs_create_options(cifs_sb, 0),
@@ -2182,6 +2187,7 @@ smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = path,
 		.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
 		.disposition = FILE_OPEN,
 		.create_options = cifs_create_options(cifs_sb, 0),
@@ -2514,6 +2520,7 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
 
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = path,
 		.desired_access = desired_access,
 		.disposition = FILE_OPEN,
 		.create_options = cifs_create_options(cifs_sb, 0),
@@ -2648,6 +2655,7 @@ smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = "",
 		.desired_access = FILE_READ_ATTRIBUTES,
 		.disposition = FILE_OPEN,
 		.create_options = cifs_create_options(cifs_sb, 0),
@@ -2942,6 +2950,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
 
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = full_path,
 		.desired_access = FILE_READ_ATTRIBUTES,
 		.disposition = FILE_OPEN,
 		.create_options = cifs_create_options(cifs_sb, create_options),
@@ -3082,6 +3091,7 @@ smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
 
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = full_path,
 		.desired_access = FILE_READ_ATTRIBUTES,
 		.disposition = FILE_OPEN,
 		.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
@@ -3222,6 +3232,7 @@ get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
 
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
+		.path = path,
 		.desired_access = READ_CONTROL,
 		.disposition = FILE_OPEN,
 		/*

fs/cifs/smb2pdu.c

@@ -2705,7 +2705,7 @@ int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
 	rqst.rq_nvec = n_iov;
 
 	/* no need to inc num_remote_opens because we close it just below */
-	trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, CREATE_NOT_FILE,
+	trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, full_path, CREATE_NOT_FILE,
 				    FILE_WRITE_ATTRIBUTES);
 	/* resource #4: response buffer */
 	rc = cifs_send_recv(xid, ses, server,
@@ -2973,7 +2973,7 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
 	if (rc)
 		goto creat_exit;
 
-	trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid,
+	trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid, oparms->path,
 		oparms->create_options, oparms->desired_access);
 
 	rc = cifs_send_recv(xid, ses, server,

fs/cifs/trace.h

@@ -701,13 +701,15 @@ DECLARE_EVENT_CLASS(smb3_open_enter_class,
 	TP_PROTO(unsigned int xid,
 		__u32	tid,
 		__u64	sesid,
+		const char *full_path,
 		int	create_options,
 		int	desired_access),
-	TP_ARGS(xid, tid, sesid, create_options, desired_access),
+	TP_ARGS(xid, tid, sesid, full_path, create_options, desired_access),
 	TP_STRUCT__entry(
 		__field(unsigned int, xid)
 		__field(__u32, tid)
 		__field(__u64, sesid)
+		__string(path, full_path)
 		__field(int, create_options)
 		__field(int, desired_access)
 	),
@@ -715,11 +717,12 @@ DECLARE_EVENT_CLASS(smb3_open_enter_class,
 		__entry->xid = xid;
 		__entry->tid = tid;
 		__entry->sesid = sesid;
+		__assign_str(path, full_path);
 		__entry->create_options = create_options;
 		__entry->desired_access = desired_access;
 	),
-	TP_printk("xid=%u sid=0x%llx tid=0x%x cr_opts=0x%x des_access=0x%x",
+	TP_printk("xid=%u sid=0x%llx tid=0x%x path=%s cr_opts=0x%x des_access=0x%x",
-		__entry->xid, __entry->sesid, __entry->tid,
+		__entry->xid, __entry->sesid, __entry->tid, __get_str(path),
 		__entry->create_options, __entry->desired_access)
 )
 
@@ -728,9 +731,10 @@ DEFINE_EVENT(smb3_open_enter_class, smb3_##name,  \
 	TP_PROTO(unsigned int xid,		\
 		__u32	tid,			\
 		__u64	sesid,			\
+		const char *full_path,		\
 		int	create_options,		\
 		int	desired_access),	\
-	TP_ARGS(xid, tid, sesid, create_options, desired_access))
+	TP_ARGS(xid, tid, sesid, full_path, create_options, desired_access))
 
 DEFINE_SMB3_OPEN_ENTER_EVENT(open_enter);
 DEFINE_SMB3_OPEN_ENTER_EVENT(posix_mkdir_enter);