path: root/fs/cifs/cifs_debug.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *   fs/cifs_debug.c
 *
 *   Copyright (C) International Business Machines  Corp., 2000,2005
 *
 *   Modified by Steve French (sfrench@us.ibm.com)
 */
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/uaccess.h>
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifsfs.h"
#ifdef CONFIG_CIFS_DFS_UPCALL
#include "dfs_cache.h"
#endif
#ifdef CONFIG_CIFS_SMB_DIRECT
#include "smbdirect.h"
#endif
#ifdef CONFIG_CIFS_SWN_UPCALL
#include "cifs_swn.h"
#endif

void
cifs_dump_mem(char *label, void *data, int length)
{
	pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
		       data, length, true);
}

void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
{
#ifdef CONFIG_CIFS_DEBUG2
	struct smb_hdr *smb = (struct smb_hdr *)buf;

	cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
		 smb->Command, smb->Status.CifsError,
		 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
	cifs_dbg(VFS, "smb buf %p len %u\n", smb,
		 server->ops->calc_smb_size(smb, server));
#endif /* CONFIG_CIFS_DEBUG2 */
}

void cifs_dump_mids(struct TCP_Server_Info *server)
{
#ifdef CONFIG_CIFS_DEBUG2
	struct list_head *tmp;
	struct mid_q_entry *mid_entry;

	if (server == NULL)
		return;

	cifs_dbg(VFS, "Dump pending requests:\n");
	spin_lock(&GlobalMid_Lock);
	list_for_each(tmp, &server->pending_mid_q) {
		mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
		cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
			 mid_entry->mid_state,
			 le16_to_cpu(mid_entry->command),
			 mid_entry->pid,
			 mid_entry->callback_data,
			 mid_entry->mid);
#ifdef CONFIG_CIFS_STATS2
		cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
			 mid_entry->large_buf,
			 mid_entry->resp_buf,
			 mid_entry->when_received,
			 jiffies);
#endif /* STATS2 */
		cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
			 mid_entry->multiRsp, mid_entry->multiEnd);
		if (mid_entry->resp_buf) {
			cifs_dump_detail(mid_entry->resp_buf, server);
			cifs_dump_mem("existing buf: ",
				mid_entry->resp_buf, 62);
		}
	}
	spin_unlock(&GlobalMid_Lock);
#endif /* CONFIG_CIFS_DEBUG2 */
}

#ifdef CONFIG_PROC_FS
static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
{
	__u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);

	seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
	if (tcon->nativeFileSystem)
		seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
	seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
		   le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
		   le32_to_cpu(tcon->fsAttrInfo.Attributes),
		   le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
		   tcon->tidStatus);
	if (dev_type == FILE_DEVICE_DISK)
		seq_puts(m, " type: DISK ");
	else if (dev_type == FILE_DEVICE_CD_ROM)
		seq_puts(m, " type: CDROM ");
	else
		seq_printf(m, " type: %d ", dev_type);

	seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);

	if ((tcon->seal) ||
	    (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
	    (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
		seq_printf(m, " Encrypted");
	if (tcon->nocase)
		seq_printf(m, " nocase");
	if (tcon->unix_ext)
		seq_printf(m, " POSIX Extensions");
	if (tcon->ses->server->ops->dump_share_caps)
		tcon->ses->server->ops->dump_share_caps(m, tcon);
#ifdef CONFIG_CIFS_SWN_UPCALL
	if (tcon->use_witness)
		seq_puts(m, " Witness");
#endif

	if (tcon->need_reconnect)
		seq_puts(m, "\tDISCONNECTED ");
	seq_putc(m, '\n');
}

static void
cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
{
	struct TCP_Server_Info *server = chan->server;

	seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
		   "\n\t\tNumber of credits: %d Dialect 0x%x"
		   "\n\t\tTCP status: %d Instance: %d"
		   "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
		   "\n\t\tIn Send: %d In MaxReq Wait: %d",
		   i+1, server->conn_id,
		   server->credits,
		   server->dialect,
		   server->tcpStatus,
		   server->reconnect_instance,
		   server->srv_count,
		   server->sec_mode,
		   in_flight(server),
		   atomic_read(&server->in_send),
		   atomic_read(&server->num_waiters));
}

static void