forked from Minki/linux
e7ddee9037
The code that allows these structs to be shared is extremely racy. Disable the sharing of SMB and tcon structs for now until we can come up with a way to do this that's race free. We want to continue to share TCP sessions, however since they are required for multiuser mounts. For that, implement a new (hopefully race-free) scheme. Add a new global list of TCP sessions, and take care to get a reference to it whenever we're dealing with one. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
775 lines
20 KiB
C
775 lines
20 KiB
C
/*
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* fs/cifs_debug.c
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*
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* Copyright (C) International Business Machines Corp., 2000,2005
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*
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* Modified by Steve French (sfrench@us.ibm.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/fs.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
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#include <linux/module.h>
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#include <linux/proc_fs.h>
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#include <asm/uaccess.h>
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#include "cifspdu.h"
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#include "cifsglob.h"
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#include "cifsproto.h"
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#include "cifs_debug.h"
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#include "cifsfs.h"
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void
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cifs_dump_mem(char *label, void *data, int length)
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{
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int i, j;
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int *intptr = data;
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char *charptr = data;
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char buf[10], line[80];
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printk(KERN_DEBUG "%s: dump of %d bytes of data at 0x%p\n",
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label, length, data);
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for (i = 0; i < length; i += 16) {
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line[0] = 0;
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for (j = 0; (j < 4) && (i + j * 4 < length); j++) {
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sprintf(buf, " %08x", intptr[i / 4 + j]);
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strcat(line, buf);
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}
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buf[0] = ' ';
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buf[2] = 0;
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for (j = 0; (j < 16) && (i + j < length); j++) {
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buf[1] = isprint(charptr[i + j]) ? charptr[i + j] : '.';
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strcat(line, buf);
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}
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printk(KERN_DEBUG "%s\n", line);
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}
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}
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#ifdef CONFIG_CIFS_DEBUG2
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void cifs_dump_detail(struct smb_hdr *smb)
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{
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cERROR(1, ("Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d",
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smb->Command, smb->Status.CifsError,
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smb->Flags, smb->Flags2, smb->Mid, smb->Pid));
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cERROR(1, ("smb buf %p len %d", smb, smbCalcSize_LE(smb)));
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}
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void cifs_dump_mids(struct TCP_Server_Info *server)
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{
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struct list_head *tmp;
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struct mid_q_entry *mid_entry;
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if (server == NULL)
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return;
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cERROR(1, ("Dump pending requests:"));
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spin_lock(&GlobalMid_Lock);
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list_for_each(tmp, &server->pending_mid_q) {
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mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
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cERROR(1, ("State: %d Cmd: %d Pid: %d Tsk: %p Mid %d",
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mid_entry->midState,
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(int)mid_entry->command,
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mid_entry->pid,
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mid_entry->tsk,
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mid_entry->mid));
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#ifdef CONFIG_CIFS_STATS2
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cERROR(1, ("IsLarge: %d buf: %p time rcv: %ld now: %ld",
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mid_entry->largeBuf,
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mid_entry->resp_buf,
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mid_entry->when_received,
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jiffies));
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#endif /* STATS2 */
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cERROR(1, ("IsMult: %d IsEnd: %d", mid_entry->multiRsp,
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mid_entry->multiEnd));
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if (mid_entry->resp_buf) {
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cifs_dump_detail(mid_entry->resp_buf);
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cifs_dump_mem("existing buf: ",
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mid_entry->resp_buf, 62);
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}
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}
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spin_unlock(&GlobalMid_Lock);
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}
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#endif /* CONFIG_CIFS_DEBUG2 */
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#ifdef CONFIG_PROC_FS
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static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
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{
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struct list_head *tmp;
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struct list_head *tmp1;
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struct mid_q_entry *mid_entry;
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struct cifsSesInfo *ses;
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struct cifsTconInfo *tcon;
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int i;
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seq_puts(m,
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"Display Internal CIFS Data Structures for Debugging\n"
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"---------------------------------------------------\n");
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seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
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seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
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seq_printf(m, "Servers:");
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i = 0;
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read_lock(&GlobalSMBSeslock);
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list_for_each(tmp, &GlobalSMBSessionList) {
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i++;
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ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
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if ((ses->serverDomain == NULL) || (ses->serverOS == NULL) ||
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(ses->serverNOS == NULL)) {
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seq_printf(m, "\nentry for %s not fully "
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"displayed\n\t", ses->serverName);
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} else {
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seq_printf(m,
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"\n%d) Name: %s Domain: %s Mounts: %d OS:"
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" %s \n\tNOS: %s\tCapability: 0x%x\n\tSMB"
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" session status: %d\t",
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i, ses->serverName, ses->serverDomain,
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atomic_read(&ses->inUse),
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ses->serverOS, ses->serverNOS,
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ses->capabilities, ses->status);
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}
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if (ses->server) {
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seq_printf(m, "TCP status: %d\n\tLocal Users To "
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"Server: %d SecMode: 0x%x Req On Wire: %d",
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ses->server->tcpStatus,
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ses->server->srv_count,
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ses->server->secMode,
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atomic_read(&ses->server->inFlight));
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#ifdef CONFIG_CIFS_STATS2
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seq_printf(m, " In Send: %d In MaxReq Wait: %d",
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atomic_read(&ses->server->inSend),
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atomic_read(&ses->server->num_waiters));
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#endif
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seq_puts(m, "\nMIDs:\n");
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spin_lock(&GlobalMid_Lock);
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list_for_each(tmp1, &ses->server->pending_mid_q) {
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mid_entry = list_entry(tmp1, struct
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mid_q_entry,
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qhead);
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seq_printf(m, "State: %d com: %d pid:"
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" %d tsk: %p mid %d\n",
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mid_entry->midState,
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(int)mid_entry->command,
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mid_entry->pid,
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mid_entry->tsk,
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mid_entry->mid);
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}
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spin_unlock(&GlobalMid_Lock);
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}
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}
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read_unlock(&GlobalSMBSeslock);
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seq_putc(m, '\n');
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seq_puts(m, "Shares:");
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i = 0;
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read_lock(&GlobalSMBSeslock);
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list_for_each(tmp, &GlobalTreeConnectionList) {
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__u32 dev_type;
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i++;
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tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
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dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
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seq_printf(m, "\n%d) %s Uses: %d ", i,
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tcon->treeName, atomic_read(&tcon->useCount));
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if (tcon->nativeFileSystem) {
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seq_printf(m, "Type: %s ",
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tcon->nativeFileSystem);
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}
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seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
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"\nPathComponentMax: %d Status: %d",
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le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
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le32_to_cpu(tcon->fsAttrInfo.Attributes),
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le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
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tcon->tidStatus);
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if (dev_type == FILE_DEVICE_DISK)
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seq_puts(m, " type: DISK ");
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else if (dev_type == FILE_DEVICE_CD_ROM)
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seq_puts(m, " type: CDROM ");
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else
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seq_printf(m, " type: %d ", dev_type);
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if (tcon->need_reconnect)
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seq_puts(m, "\tDISCONNECTED ");
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}
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read_unlock(&GlobalSMBSeslock);
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seq_putc(m, '\n');
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/* BB add code to dump additional info such as TCP session info now */
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return 0;
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}
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static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, cifs_debug_data_proc_show, NULL);
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}
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static const struct file_operations cifs_debug_data_proc_fops = {
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.owner = THIS_MODULE,
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.open = cifs_debug_data_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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#ifdef CONFIG_CIFS_STATS
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static ssize_t cifs_stats_proc_write(struct file *file,
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const char __user *buffer, size_t count, loff_t *ppos)
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{
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char c;
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int rc;
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struct list_head *tmp;
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struct cifsTconInfo *tcon;
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rc = get_user(c, buffer);
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if (rc)
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return rc;
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if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
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read_lock(&GlobalSMBSeslock);
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#ifdef CONFIG_CIFS_STATS2
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atomic_set(&totBufAllocCount, 0);
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atomic_set(&totSmBufAllocCount, 0);
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#endif /* CONFIG_CIFS_STATS2 */
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list_for_each(tmp, &GlobalTreeConnectionList) {
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tcon = list_entry(tmp, struct cifsTconInfo,
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cifsConnectionList);
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atomic_set(&tcon->num_smbs_sent, 0);
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atomic_set(&tcon->num_writes, 0);
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atomic_set(&tcon->num_reads, 0);
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atomic_set(&tcon->num_oplock_brks, 0);
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atomic_set(&tcon->num_opens, 0);
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atomic_set(&tcon->num_closes, 0);
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atomic_set(&tcon->num_deletes, 0);
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atomic_set(&tcon->num_mkdirs, 0);
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atomic_set(&tcon->num_rmdirs, 0);
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atomic_set(&tcon->num_renames, 0);
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atomic_set(&tcon->num_t2renames, 0);
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atomic_set(&tcon->num_ffirst, 0);
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atomic_set(&tcon->num_fnext, 0);
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atomic_set(&tcon->num_fclose, 0);
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atomic_set(&tcon->num_hardlinks, 0);
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atomic_set(&tcon->num_symlinks, 0);
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atomic_set(&tcon->num_locks, 0);
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}
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read_unlock(&GlobalSMBSeslock);
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}
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return count;
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}
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static int cifs_stats_proc_show(struct seq_file *m, void *v)
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{
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int i;
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struct list_head *tmp;
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struct cifsTconInfo *tcon;
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seq_printf(m,
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"Resources in use\nCIFS Session: %d\n",
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sesInfoAllocCount.counter);
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seq_printf(m, "Share (unique mount targets): %d\n",
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tconInfoAllocCount.counter);
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seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
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bufAllocCount.counter,
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cifs_min_rcv + tcpSesAllocCount.counter);
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seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
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smBufAllocCount.counter, cifs_min_small);
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#ifdef CONFIG_CIFS_STATS2
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seq_printf(m, "Total Large %d Small %d Allocations\n",
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atomic_read(&totBufAllocCount),
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atomic_read(&totSmBufAllocCount));
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#endif /* CONFIG_CIFS_STATS2 */
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seq_printf(m, "Operations (MIDs): %d\n", midCount.counter);
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seq_printf(m,
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"\n%d session %d share reconnects\n",
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tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
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seq_printf(m,
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"Total vfs operations: %d maximum at one time: %d\n",
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GlobalCurrentXid, GlobalMaxActiveXid);
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i = 0;
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read_lock(&GlobalSMBSeslock);
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list_for_each(tmp, &GlobalTreeConnectionList) {
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i++;
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tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
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seq_printf(m, "\n%d) %s", i, tcon->treeName);
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if (tcon->need_reconnect)
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seq_puts(m, "\tDISCONNECTED ");
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seq_printf(m, "\nSMBs: %d Oplock Breaks: %d",
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atomic_read(&tcon->num_smbs_sent),
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atomic_read(&tcon->num_oplock_brks));
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seq_printf(m, "\nReads: %d Bytes: %lld",
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atomic_read(&tcon->num_reads),
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(long long)(tcon->bytes_read));
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seq_printf(m, "\nWrites: %d Bytes: %lld",
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atomic_read(&tcon->num_writes),
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(long long)(tcon->bytes_written));
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seq_printf(m,
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"\nLocks: %d HardLinks: %d Symlinks: %d",
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atomic_read(&tcon->num_locks),
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atomic_read(&tcon->num_hardlinks),
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atomic_read(&tcon->num_symlinks));
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seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
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atomic_read(&tcon->num_opens),
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atomic_read(&tcon->num_closes),
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atomic_read(&tcon->num_deletes));
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seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
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atomic_read(&tcon->num_mkdirs),
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atomic_read(&tcon->num_rmdirs));
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seq_printf(m, "\nRenames: %d T2 Renames %d",
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atomic_read(&tcon->num_renames),
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atomic_read(&tcon->num_t2renames));
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seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
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atomic_read(&tcon->num_ffirst),
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atomic_read(&tcon->num_fnext),
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atomic_read(&tcon->num_fclose));
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}
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read_unlock(&GlobalSMBSeslock);
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seq_putc(m, '\n');
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return 0;
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}
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static int cifs_stats_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, cifs_stats_proc_show, NULL);
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}
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static const struct file_operations cifs_stats_proc_fops = {
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.owner = THIS_MODULE,
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.open = cifs_stats_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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.write = cifs_stats_proc_write,
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};
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#endif /* STATS */
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static struct proc_dir_entry *proc_fs_cifs;
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static const struct file_operations cifsFYI_proc_fops;
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static const struct file_operations cifs_oplock_proc_fops;
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static const struct file_operations cifs_lookup_cache_proc_fops;
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static const struct file_operations traceSMB_proc_fops;
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static const struct file_operations cifs_multiuser_mount_proc_fops;
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static const struct file_operations cifs_security_flags_proc_fops;
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static const struct file_operations cifs_experimental_proc_fops;
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static const struct file_operations cifs_linux_ext_proc_fops;
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void
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cifs_proc_init(void)
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{
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proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
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if (proc_fs_cifs == NULL)
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return;
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proc_fs_cifs->owner = THIS_MODULE;
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proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
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#ifdef CONFIG_CIFS_STATS
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proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
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#endif /* STATS */
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proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
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proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
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proc_create("OplockEnabled", 0, proc_fs_cifs, &cifs_oplock_proc_fops);
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proc_create("Experimental", 0, proc_fs_cifs,
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&cifs_experimental_proc_fops);
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proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
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&cifs_linux_ext_proc_fops);
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proc_create("MultiuserMount", 0, proc_fs_cifs,
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&cifs_multiuser_mount_proc_fops);
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proc_create("SecurityFlags", 0, proc_fs_cifs,
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&cifs_security_flags_proc_fops);
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proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
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&cifs_lookup_cache_proc_fops);
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}
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void
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cifs_proc_clean(void)
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{
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if (proc_fs_cifs == NULL)
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return;
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remove_proc_entry("DebugData", proc_fs_cifs);
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remove_proc_entry("cifsFYI", proc_fs_cifs);
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remove_proc_entry("traceSMB", proc_fs_cifs);
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#ifdef CONFIG_CIFS_STATS
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remove_proc_entry("Stats", proc_fs_cifs);
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#endif
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remove_proc_entry("MultiuserMount", proc_fs_cifs);
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remove_proc_entry("OplockEnabled", proc_fs_cifs);
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remove_proc_entry("SecurityFlags", proc_fs_cifs);
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remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
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remove_proc_entry("Experimental", proc_fs_cifs);
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remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
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remove_proc_entry("fs/cifs", NULL);
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}
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static int cifsFYI_proc_show(struct seq_file *m, void *v)
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{
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seq_printf(m, "%d\n", cifsFYI);
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return 0;
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}
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static int cifsFYI_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, cifsFYI_proc_show, NULL);
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}
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static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
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size_t count, loff_t *ppos)
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{
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char c;
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int rc;
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rc = get_user(c, buffer);
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if (rc)
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return rc;
|
|
if (c == '0' || c == 'n' || c == 'N')
|
|
cifsFYI = 0;
|
|
else if (c == '1' || c == 'y' || c == 'Y')
|
|
cifsFYI = 1;
|
|
else if ((c > '1') && (c <= '9'))
|
|
cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
|
|
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations cifsFYI_proc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = cifsFYI_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.write = cifsFYI_proc_write,
|
|
};
|
|
|
|
static int cifs_oplock_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
seq_printf(m, "%d\n", oplockEnabled);
|
|
return 0;
|
|
}
|
|
|
|
static int cifs_oplock_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, cifs_oplock_proc_show, NULL);
|
|
}
|
|
|
|
static ssize_t cifs_oplock_proc_write(struct file *file,
|
|
const char __user *buffer, size_t count, loff_t *ppos)
|
|
{
|
|
char c;
|
|
int rc;
|
|
|
|
rc = get_user(c, buffer);
|
|
if (rc)
|
|
return rc;
|
|
if (c == '0' || c == 'n' || c == 'N')
|
|
oplockEnabled = 0;
|
|
else if (c == '1' || c == 'y' || c == 'Y')
|
|
oplockEnabled = 1;
|
|
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations cifs_oplock_proc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = cifs_oplock_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.write = cifs_oplock_proc_write,
|
|
};
|
|
|
|
static int cifs_experimental_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
seq_printf(m, "%d\n", experimEnabled);
|
|
return 0;
|
|
}
|
|
|
|
static int cifs_experimental_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, cifs_experimental_proc_show, NULL);
|
|
}
|
|
|
|
static ssize_t cifs_experimental_proc_write(struct file *file,
|
|
const char __user *buffer, size_t count, loff_t *ppos)
|
|
{
|
|
char c;
|
|
int rc;
|
|
|
|
rc = get_user(c, buffer);
|
|
if (rc)
|
|
return rc;
|
|
if (c == '0' || c == 'n' || c == 'N')
|
|
experimEnabled = 0;
|
|
else if (c == '1' || c == 'y' || c == 'Y')
|
|
experimEnabled = 1;
|
|
else if (c == '2')
|
|
experimEnabled = 2;
|
|
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations cifs_experimental_proc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = cifs_experimental_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.write = cifs_experimental_proc_write,
|
|
};
|
|
|
|
static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
seq_printf(m, "%d\n", linuxExtEnabled);
|
|
return 0;
|
|
}
|
|
|
|
static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, cifs_linux_ext_proc_show, NULL);
|
|
}
|
|
|
|
static ssize_t cifs_linux_ext_proc_write(struct file *file,
|
|
const char __user *buffer, size_t count, loff_t *ppos)
|
|
{
|
|
char c;
|
|
int rc;
|
|
|
|
rc = get_user(c, buffer);
|
|
if (rc)
|
|
return rc;
|
|
if (c == '0' || c == 'n' || c == 'N')
|
|
linuxExtEnabled = 0;
|
|
else if (c == '1' || c == 'y' || c == 'Y')
|
|
linuxExtEnabled = 1;
|
|
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations cifs_linux_ext_proc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = cifs_linux_ext_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.write = cifs_linux_ext_proc_write,
|
|
};
|
|
|
|
static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
seq_printf(m, "%d\n", lookupCacheEnabled);
|
|
return 0;
|
|
}
|
|
|
|
static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, cifs_lookup_cache_proc_show, NULL);
|
|
}
|
|
|
|
static ssize_t cifs_lookup_cache_proc_write(struct file *file,
|
|
const char __user *buffer, size_t count, loff_t *ppos)
|
|
{
|
|
char c;
|
|
int rc;
|
|
|
|
rc = get_user(c, buffer);
|
|
if (rc)
|
|
return rc;
|
|
if (c == '0' || c == 'n' || c == 'N')
|
|
lookupCacheEnabled = 0;
|
|
else if (c == '1' || c == 'y' || c == 'Y')
|
|
lookupCacheEnabled = 1;
|
|
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations cifs_lookup_cache_proc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = cifs_lookup_cache_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.write = cifs_lookup_cache_proc_write,
|
|
};
|
|
|
|
static int traceSMB_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
seq_printf(m, "%d\n", traceSMB);
|
|
return 0;
|
|
}
|
|
|
|
static int traceSMB_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, traceSMB_proc_show, NULL);
|
|
}
|
|
|
|
static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
char c;
|
|
int rc;
|
|
|
|
rc = get_user(c, buffer);
|
|
if (rc)
|
|
return rc;
|
|
if (c == '0' || c == 'n' || c == 'N')
|
|
traceSMB = 0;
|
|
else if (c == '1' || c == 'y' || c == 'Y')
|
|
traceSMB = 1;
|
|
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations traceSMB_proc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = traceSMB_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.write = traceSMB_proc_write,
|
|
};
|
|
|
|
static int cifs_multiuser_mount_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
seq_printf(m, "%d\n", multiuser_mount);
|
|
return 0;
|
|
}
|
|
|
|
static int cifs_multiuser_mount_proc_open(struct inode *inode, struct file *fh)
|
|
{
|
|
return single_open(fh, cifs_multiuser_mount_proc_show, NULL);
|
|
}
|
|
|
|
static ssize_t cifs_multiuser_mount_proc_write(struct file *file,
|
|
const char __user *buffer, size_t count, loff_t *ppos)
|
|
{
|
|
char c;
|
|
int rc;
|
|
|
|
rc = get_user(c, buffer);
|
|
if (rc)
|
|
return rc;
|
|
if (c == '0' || c == 'n' || c == 'N')
|
|
multiuser_mount = 0;
|
|
else if (c == '1' || c == 'y' || c == 'Y')
|
|
multiuser_mount = 1;
|
|
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations cifs_multiuser_mount_proc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = cifs_multiuser_mount_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.write = cifs_multiuser_mount_proc_write,
|
|
};
|
|
|
|
static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
seq_printf(m, "0x%x\n", extended_security);
|
|
return 0;
|
|
}
|
|
|
|
static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, cifs_security_flags_proc_show, NULL);
|
|
}
|
|
|
|
static ssize_t cifs_security_flags_proc_write(struct file *file,
|
|
const char __user *buffer, size_t count, loff_t *ppos)
|
|
{
|
|
unsigned int flags;
|
|
char flags_string[12];
|
|
char c;
|
|
|
|
if ((count < 1) || (count > 11))
|
|
return -EINVAL;
|
|
|
|
memset(flags_string, 0, 12);
|
|
|
|
if (copy_from_user(flags_string, buffer, count))
|
|
return -EFAULT;
|
|
|
|
if (count < 3) {
|
|
/* single char or single char followed by null */
|
|
c = flags_string[0];
|
|
if (c == '0' || c == 'n' || c == 'N') {
|
|
extended_security = CIFSSEC_DEF; /* default */
|
|
return count;
|
|
} else if (c == '1' || c == 'y' || c == 'Y') {
|
|
extended_security = CIFSSEC_MAX;
|
|
return count;
|
|
} else if (!isdigit(c)) {
|
|
cERROR(1, ("invalid flag %c", c));
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
/* else we have a number */
|
|
|
|
flags = simple_strtoul(flags_string, NULL, 0);
|
|
|
|
cFYI(1, ("sec flags 0x%x", flags));
|
|
|
|
if (flags <= 0) {
|
|
cERROR(1, ("invalid security flags %s", flags_string));
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (flags & ~CIFSSEC_MASK) {
|
|
cERROR(1, ("attempt to set unsupported security flags 0x%x",
|
|
flags & ~CIFSSEC_MASK));
|
|
return -EINVAL;
|
|
}
|
|
/* flags look ok - update the global security flags for cifs module */
|
|
extended_security = flags;
|
|
if (extended_security & CIFSSEC_MUST_SIGN) {
|
|
/* requiring signing implies signing is allowed */
|
|
extended_security |= CIFSSEC_MAY_SIGN;
|
|
cFYI(1, ("packet signing now required"));
|
|
} else if ((extended_security & CIFSSEC_MAY_SIGN) == 0) {
|
|
cFYI(1, ("packet signing disabled"));
|
|
}
|
|
/* BB should we turn on MAY flags for other MUST options? */
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations cifs_security_flags_proc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = cifs_security_flags_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.write = cifs_security_flags_proc_write,
|
|
};
|
|
#else
|
|
inline void cifs_proc_init(void)
|
|
{
|
|
}
|
|
|
|
inline void cifs_proc_clean(void)
|
|
{
|
|
}
|
|
#endif /* PROC_FS */
|