03776f4516
Split cifs_lock into several functions and let CIFSSMBLock get pid as an argument. Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
1003 lines
31 KiB
C
1003 lines
31 KiB
C
/*
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* fs/cifs/cifsglob.h
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*
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* Copyright (C) International Business Machines Corp., 2002,2008
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* Author(s): Steve French (sfrench@us.ibm.com)
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* Jeremy Allison (jra@samba.org)
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library 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 Lesser General Public License for more details.
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*
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*/
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#ifndef _CIFS_GLOB_H
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#define _CIFS_GLOB_H
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include "cifs_fs_sb.h"
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#include "cifsacl.h"
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#include <crypto/internal/hash.h>
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#include <linux/scatterlist.h>
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/*
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* The sizes of various internal tables and strings
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*/
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#define MAX_UID_INFO 16
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#define MAX_SES_INFO 2
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#define MAX_TCON_INFO 4
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#define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
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#define MAX_SERVER_SIZE 15
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#define MAX_SHARE_SIZE 80
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#define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
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#define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
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#define CIFS_MIN_RCV_POOL 4
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/*
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* default attribute cache timeout (jiffies)
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*/
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#define CIFS_DEF_ACTIMEO (1 * HZ)
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/*
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* max attribute cache timeout (jiffies) - 2^30
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*/
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#define CIFS_MAX_ACTIMEO (1 << 30)
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/*
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* MAX_REQ is the maximum number of requests that WE will send
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* on one socket concurrently. It also matches the most common
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* value of max multiplex returned by servers. We may
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* eventually want to use the negotiated value (in case
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* future servers can handle more) when we are more confident that
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* we will not have problems oveloading the socket with pending
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* write data.
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*/
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#define CIFS_MAX_REQ 50
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#define RFC1001_NAME_LEN 15
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#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
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/* currently length of NIP6_FMT */
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#define SERVER_NAME_LENGTH 40
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#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
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/* used to define string lengths for reversing unicode strings */
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/* (256+1)*2 = 514 */
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/* (max path length + 1 for null) * 2 for unicode */
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#define MAX_NAME 514
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#include "cifspdu.h"
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#ifndef XATTR_DOS_ATTRIB
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#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
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#endif
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/*
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* CIFS vfs client Status information (based on what we know.)
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*/
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/* associated with each tcp and smb session */
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enum statusEnum {
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CifsNew = 0,
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CifsGood,
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CifsExiting,
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CifsNeedReconnect,
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CifsNeedNegotiate
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};
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enum securityEnum {
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LANMAN = 0, /* Legacy LANMAN auth */
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NTLM, /* Legacy NTLM012 auth with NTLM hash */
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NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
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RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
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/* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
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Kerberos, /* Kerberos via SPNEGO */
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};
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enum protocolEnum {
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TCP = 0,
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SCTP
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/* Netbios frames protocol not supported at this time */
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};
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struct session_key {
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unsigned int len;
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char *response;
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};
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/* crypto security descriptor definition */
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struct sdesc {
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struct shash_desc shash;
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char ctx[];
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};
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/* crypto hashing related structure/fields, not specific to a sec mech */
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struct cifs_secmech {
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struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
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struct crypto_shash *md5; /* md5 hash function */
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struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
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struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
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};
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/* per smb session structure/fields */
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struct ntlmssp_auth {
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__u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
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__u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
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unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
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char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
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};
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struct cifs_cred {
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int uid;
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int gid;
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int mode;
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int cecount;
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struct cifs_sid osid;
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struct cifs_sid gsid;
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struct cifs_ntace *ntaces;
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struct cifs_ace *aces;
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};
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/*
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*****************************************************************
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* Except the CIFS PDUs themselves all the
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* globally interesting structs should go here
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*****************************************************************
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*/
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struct smb_vol {
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char *username;
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char *password;
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char *domainname;
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char *UNC;
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char *UNCip;
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char *iocharset; /* local code page for mapping to and from Unicode */
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char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
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char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
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uid_t cred_uid;
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uid_t linux_uid;
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gid_t linux_gid;
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uid_t backupuid;
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gid_t backupgid;
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mode_t file_mode;
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mode_t dir_mode;
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unsigned secFlg;
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bool retry:1;
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bool intr:1;
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bool setuids:1;
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bool override_uid:1;
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bool override_gid:1;
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bool dynperm:1;
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bool noperm:1;
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bool no_psx_acl:1; /* set if posix acl support should be disabled */
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bool cifs_acl:1;
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bool backupuid_specified; /* mount option backupuid is specified */
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bool backupgid_specified; /* mount option backupgid is specified */
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bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
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bool server_ino:1; /* use inode numbers from server ie UniqueId */
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bool direct_io:1;
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bool strict_io:1; /* strict cache behavior */
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bool remap:1; /* set to remap seven reserved chars in filenames */
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bool posix_paths:1; /* unset to not ask for posix pathnames. */
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bool no_linux_ext:1;
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bool sfu_emul:1;
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bool nullauth:1; /* attempt to authenticate with null user */
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bool nocase:1; /* request case insensitive filenames */
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bool nobrl:1; /* disable sending byte range locks to srv */
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bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
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bool seal:1; /* request transport encryption on share */
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bool nodfs:1; /* Do not request DFS, even if available */
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bool local_lease:1; /* check leases only on local system, not remote */
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bool noblocksnd:1;
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bool noautotune:1;
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bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
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bool fsc:1; /* enable fscache */
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bool mfsymlinks:1; /* use Minshall+French Symlinks */
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bool multiuser:1;
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bool rwpidforward:1; /* pid forward for read/write operations */
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unsigned int rsize;
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unsigned int wsize;
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bool sockopt_tcp_nodelay:1;
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unsigned short int port;
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unsigned long actimeo; /* attribute cache timeout (jiffies) */
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char *prepath;
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struct sockaddr_storage srcaddr; /* allow binding to a local IP */
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struct nls_table *local_nls;
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};
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#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
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CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
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CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
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CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
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CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
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CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
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CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
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CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
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CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
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CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
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#define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
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MS_NODEV | MS_SYNCHRONOUS)
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struct cifs_mnt_data {
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struct cifs_sb_info *cifs_sb;
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struct smb_vol *vol;
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int flags;
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};
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struct TCP_Server_Info {
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struct list_head tcp_ses_list;
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struct list_head smb_ses_list;
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int srv_count; /* reference counter */
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/* 15 character server name + 0x20 16th byte indicating type = srv */
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char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
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enum statusEnum tcpStatus; /* what we think the status is */
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char *hostname; /* hostname portion of UNC string */
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struct socket *ssocket;
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struct sockaddr_storage dstaddr;
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struct sockaddr_storage srcaddr; /* locally bind to this IP */
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#ifdef CONFIG_NET_NS
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struct net *net;
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#endif
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wait_queue_head_t response_q;
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wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
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struct list_head pending_mid_q;
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bool noblocksnd; /* use blocking sendmsg */
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bool noautotune; /* do not autotune send buf sizes */
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bool tcp_nodelay;
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atomic_t inFlight; /* number of requests on the wire to server */
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struct mutex srv_mutex;
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struct task_struct *tsk;
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char server_GUID[16];
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char sec_mode;
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bool session_estab; /* mark when very first sess is established */
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u16 dialect; /* dialect index that server chose */
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enum securityEnum secType;
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unsigned int maxReq; /* Clients should submit no more */
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/* than maxReq distinct unanswered SMBs to the server when using */
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/* multiplexed reads or writes */
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unsigned int maxBuf; /* maxBuf specifies the maximum */
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/* message size the server can send or receive for non-raw SMBs */
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/* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
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/* when socket is setup (and during reconnect) before NegProt sent */
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unsigned int max_rw; /* maxRw specifies the maximum */
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/* message size the server can send or receive for */
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/* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
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unsigned int max_vcs; /* maximum number of smb sessions, at least
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those that can be specified uniquely with
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vcnumbers */
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int capabilities; /* allow selective disabling of caps by smb sess */
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int timeAdj; /* Adjust for difference in server time zone in sec */
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__u16 CurrentMid; /* multiplex id - rotating counter */
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char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
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/* 16th byte of RFC1001 workstation name is always null */
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char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
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__u32 sequence_number; /* for signing, protected by srv_mutex */
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struct session_key session_key;
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unsigned long lstrp; /* when we got last response from this server */
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struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
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/* extended security flavors that server supports */
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bool sec_ntlmssp; /* supports NTLMSSP */
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bool sec_kerberosu2u; /* supports U2U Kerberos */
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bool sec_kerberos; /* supports plain Kerberos */
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bool sec_mskerberos; /* supports legacy MS Kerberos */
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struct delayed_work echo; /* echo ping workqueue job */
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#ifdef CONFIG_CIFS_FSCACHE
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struct fscache_cookie *fscache; /* client index cache cookie */
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#endif
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#ifdef CONFIG_CIFS_STATS2
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atomic_t in_send; /* requests trying to send */
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atomic_t num_waiters; /* blocked waiting to get in sendrecv */
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#endif
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};
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/*
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* Macros to allow the TCP_Server_Info->net field and related code to drop out
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* when CONFIG_NET_NS isn't set.
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*/
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#ifdef CONFIG_NET_NS
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static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
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{
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return srv->net;
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}
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static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
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{
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srv->net = net;
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}
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#else
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static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
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{
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return &init_net;
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}
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static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
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{
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}
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#endif
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/*
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* Session structure. One of these for each uid session with a particular host
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*/
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struct cifs_ses {
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struct list_head smb_ses_list;
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struct list_head tcon_list;
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struct mutex session_mutex;
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struct TCP_Server_Info *server; /* pointer to server info */
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int ses_count; /* reference counter */
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enum statusEnum status;
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unsigned overrideSecFlg; /* if non-zero override global sec flags */
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__u16 ipc_tid; /* special tid for connection to IPC share */
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__u16 flags;
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__u16 vcnum;
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char *serverOS; /* name of operating system underlying server */
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char *serverNOS; /* name of network operating system of server */
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char *serverDomain; /* security realm of server */
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int Suid; /* remote smb uid */
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uid_t linux_uid; /* overriding owner of files on the mount */
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uid_t cred_uid; /* owner of credentials */
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int capabilities;
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char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
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TCP names - will ipv6 and sctp addresses fit? */
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char *user_name; /* must not be null except during init of sess
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and after mount option parsing we fill it */
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char *domainName;
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char *password;
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struct session_key auth_key;
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struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
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bool need_reconnect:1; /* connection reset, uid now invalid */
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};
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/* no more than one of the following three session flags may be set */
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#define CIFS_SES_NT4 1
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#define CIFS_SES_OS2 2
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#define CIFS_SES_W9X 4
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/* following flag is set for old servers such as OS2 (and Win95?)
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which do not negotiate NTLM or POSIX dialects, but instead
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negotiate one of the older LANMAN dialects */
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#define CIFS_SES_LANMAN 8
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/*
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* there is one of these for each connection to a resource on a particular
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* session
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*/
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struct cifs_tcon {
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struct list_head tcon_list;
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int tc_count;
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struct list_head openFileList;
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struct cifs_ses *ses; /* pointer to session associated with */
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char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
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char *nativeFileSystem;
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char *password; /* for share-level security */
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__u16 tid; /* The 2 byte tree id */
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__u16 Flags; /* optional support bits */
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enum statusEnum tidStatus;
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#ifdef CONFIG_CIFS_STATS
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atomic_t num_smbs_sent;
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atomic_t num_writes;
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atomic_t num_reads;
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atomic_t num_flushes;
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atomic_t num_oplock_brks;
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atomic_t num_opens;
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atomic_t num_closes;
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atomic_t num_deletes;
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atomic_t num_mkdirs;
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atomic_t num_posixopens;
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atomic_t num_posixmkdirs;
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atomic_t num_rmdirs;
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atomic_t num_renames;
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atomic_t num_t2renames;
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atomic_t num_ffirst;
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atomic_t num_fnext;
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atomic_t num_fclose;
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atomic_t num_hardlinks;
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atomic_t num_symlinks;
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atomic_t num_locks;
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atomic_t num_acl_get;
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atomic_t num_acl_set;
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#ifdef CONFIG_CIFS_STATS2
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unsigned long long time_writes;
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unsigned long long time_reads;
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unsigned long long time_opens;
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unsigned long long time_deletes;
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unsigned long long time_closes;
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unsigned long long time_mkdirs;
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unsigned long long time_rmdirs;
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unsigned long long time_renames;
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unsigned long long time_t2renames;
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unsigned long long time_ffirst;
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unsigned long long time_fnext;
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unsigned long long time_fclose;
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#endif /* CONFIG_CIFS_STATS2 */
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__u64 bytes_read;
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__u64 bytes_written;
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spinlock_t stat_lock;
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#endif /* CONFIG_CIFS_STATS */
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FILE_SYSTEM_DEVICE_INFO fsDevInfo;
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FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
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FILE_SYSTEM_UNIX_INFO fsUnixInfo;
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bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
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bool retry:1;
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bool nocase:1;
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bool seal:1; /* transport encryption for this mounted share */
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bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
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for this mount even if server would support */
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bool local_lease:1; /* check leases (only) on local system not remote */
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bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
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bool need_reconnect:1; /* connection reset, tid now invalid */
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#ifdef CONFIG_CIFS_FSCACHE
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u64 resource_id; /* server resource id */
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struct fscache_cookie *fscache; /* cookie for share */
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#endif
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/* BB add field for back pointer to sb struct(s)? */
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};
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/*
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* This is a refcounted and timestamped container for a tcon pointer. The
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* container holds a tcon reference. It is considered safe to free one of
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* these when the tl_count goes to 0. The tl_time is the time of the last
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* "get" on the container.
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*/
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struct tcon_link {
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struct rb_node tl_rbnode;
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uid_t tl_uid;
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unsigned long tl_flags;
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#define TCON_LINK_MASTER 0
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#define TCON_LINK_PENDING 1
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#define TCON_LINK_IN_TREE 2
|
|
unsigned long tl_time;
|
|
atomic_t tl_count;
|
|
struct cifs_tcon *tl_tcon;
|
|
};
|
|
|
|
extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
|
|
|
|
static inline struct cifs_tcon *
|
|
tlink_tcon(struct tcon_link *tlink)
|
|
{
|
|
return tlink->tl_tcon;
|
|
}
|
|
|
|
extern void cifs_put_tlink(struct tcon_link *tlink);
|
|
|
|
static inline struct tcon_link *
|
|
cifs_get_tlink(struct tcon_link *tlink)
|
|
{
|
|
if (tlink && !IS_ERR(tlink))
|
|
atomic_inc(&tlink->tl_count);
|
|
return tlink;
|
|
}
|
|
|
|
/* This function is always expected to succeed */
|
|
extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
|
|
|
|
/*
|
|
* This info hangs off the cifsFileInfo structure, pointed to by llist.
|
|
* This is used to track byte stream locks on the file
|
|
*/
|
|
struct cifsLockInfo {
|
|
struct list_head llist; /* pointer to next cifsLockInfo */
|
|
__u64 offset;
|
|
__u64 length;
|
|
__u32 pid;
|
|
__u8 type;
|
|
};
|
|
|
|
/*
|
|
* One of these for each open instance of a file
|
|
*/
|
|
struct cifs_search_info {
|
|
loff_t index_of_last_entry;
|
|
__u16 entries_in_buffer;
|
|
__u16 info_level;
|
|
__u32 resume_key;
|
|
char *ntwrk_buf_start;
|
|
char *srch_entries_start;
|
|
char *last_entry;
|
|
const char *presume_name;
|
|
unsigned int resume_name_len;
|
|
bool endOfSearch:1;
|
|
bool emptyDir:1;
|
|
bool unicode:1;
|
|
bool smallBuf:1; /* so we know which buf_release function to call */
|
|
};
|
|
|
|
struct cifsFileInfo {
|
|
struct list_head tlist; /* pointer to next fid owned by tcon */
|
|
struct list_head flist; /* next fid (file instance) for this inode */
|
|
unsigned int uid; /* allows finding which FileInfo structure */
|
|
__u32 pid; /* process id who opened file */
|
|
__u16 netfid; /* file id from remote */
|
|
/* BB add lock scope info here if needed */ ;
|
|
/* lock scope id (0 if none) */
|
|
struct dentry *dentry;
|
|
unsigned int f_flags;
|
|
struct tcon_link *tlink;
|
|
struct mutex lock_mutex;
|
|
struct list_head llist; /* list of byte range locks we have. */
|
|
bool invalidHandle:1; /* file closed via session abend */
|
|
bool oplock_break_cancelled:1;
|
|
int count; /* refcount protected by cifs_file_list_lock */
|
|
struct mutex fh_mutex; /* prevents reopen race after dead ses*/
|
|
struct cifs_search_info srch_inf;
|
|
struct work_struct oplock_break; /* work for oplock breaks */
|
|
};
|
|
|
|
struct cifs_io_parms {
|
|
__u16 netfid;
|
|
__u32 pid;
|
|
__u64 offset;
|
|
unsigned int length;
|
|
struct cifs_tcon *tcon;
|
|
};
|
|
|
|
/*
|
|
* Take a reference on the file private data. Must be called with
|
|
* cifs_file_list_lock held.
|
|
*/
|
|
static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
|
|
{
|
|
++cifs_file->count;
|
|
}
|
|
|
|
void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
|
|
|
|
/*
|
|
* One of these for each file inode
|
|
*/
|
|
|
|
struct cifsInodeInfo {
|
|
struct list_head lockList;
|
|
/* BB add in lists for dirty pages i.e. write caching info for oplock */
|
|
struct list_head openFileList;
|
|
__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
|
|
bool clientCanCacheRead; /* read oplock */
|
|
bool clientCanCacheAll; /* read and writebehind oplock */
|
|
bool delete_pending; /* DELETE_ON_CLOSE is set */
|
|
bool invalid_mapping; /* pagecache is invalid */
|
|
unsigned long time; /* jiffies of last update of inode */
|
|
u64 server_eof; /* current file size on server */
|
|
u64 uniqueid; /* server inode number */
|
|
u64 createtime; /* creation time on server */
|
|
#ifdef CONFIG_CIFS_FSCACHE
|
|
struct fscache_cookie *fscache;
|
|
#endif
|
|
struct inode vfs_inode;
|
|
};
|
|
|
|
static inline struct cifsInodeInfo *
|
|
CIFS_I(struct inode *inode)
|
|
{
|
|
return container_of(inode, struct cifsInodeInfo, vfs_inode);
|
|
}
|
|
|
|
static inline struct cifs_sb_info *
|
|
CIFS_SB(struct super_block *sb)
|
|
{
|
|
return sb->s_fs_info;
|
|
}
|
|
|
|
static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
|
|
{
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
|
|
return '/';
|
|
else
|
|
return '\\';
|
|
}
|
|
|
|
static inline void
|
|
convert_delimiter(char *path, char delim)
|
|
{
|
|
int i;
|
|
char old_delim;
|
|
|
|
if (path == NULL)
|
|
return;
|
|
|
|
if (delim == '/')
|
|
old_delim = '\\';
|
|
else
|
|
old_delim = '/';
|
|
|
|
for (i = 0; path[i] != '\0'; i++) {
|
|
if (path[i] == old_delim)
|
|
path[i] = delim;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_CIFS_STATS
|
|
#define cifs_stats_inc atomic_inc
|
|
|
|
static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
|
|
unsigned int bytes)
|
|
{
|
|
if (bytes) {
|
|
spin_lock(&tcon->stat_lock);
|
|
tcon->bytes_written += bytes;
|
|
spin_unlock(&tcon->stat_lock);
|
|
}
|
|
}
|
|
|
|
static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
|
|
unsigned int bytes)
|
|
{
|
|
spin_lock(&tcon->stat_lock);
|
|
tcon->bytes_read += bytes;
|
|
spin_unlock(&tcon->stat_lock);
|
|
}
|
|
#else
|
|
|
|
#define cifs_stats_inc(field) do {} while (0)
|
|
#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
|
|
#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
|
|
|
|
#endif
|
|
|
|
struct mid_q_entry;
|
|
|
|
/*
|
|
* This is the prototype for the mid callback function. When creating one,
|
|
* take special care to avoid deadlocks. Things to bear in mind:
|
|
*
|
|
* - it will be called by cifsd, with no locks held
|
|
* - the mid will be removed from any lists
|
|
*/
|
|
typedef void (mid_callback_t)(struct mid_q_entry *mid);
|
|
|
|
/* one of these for every pending CIFS request to the server */
|
|
struct mid_q_entry {
|
|
struct list_head qhead; /* mids waiting on reply from this server */
|
|
__u16 mid; /* multiplex id */
|
|
__u16 pid; /* process id */
|
|
__u32 sequence_number; /* for CIFS signing */
|
|
unsigned long when_alloc; /* when mid was created */
|
|
#ifdef CONFIG_CIFS_STATS2
|
|
unsigned long when_sent; /* time when smb send finished */
|
|
unsigned long when_received; /* when demux complete (taken off wire) */
|
|
#endif
|
|
mid_callback_t *callback; /* call completion callback */
|
|
void *callback_data; /* general purpose pointer for callback */
|
|
struct smb_hdr *resp_buf; /* response buffer */
|
|
int midState; /* wish this were enum but can not pass to wait_event */
|
|
__u8 command; /* smb command code */
|
|
bool largeBuf:1; /* if valid response, is pointer to large buf */
|
|
bool multiRsp:1; /* multiple trans2 responses for one request */
|
|
bool multiEnd:1; /* both received */
|
|
};
|
|
|
|
/* Make code in transport.c a little cleaner by moving
|
|
update of optional stats into function below */
|
|
#ifdef CONFIG_CIFS_STATS2
|
|
|
|
static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
|
|
{
|
|
atomic_inc(&server->in_send);
|
|
}
|
|
|
|
static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
|
|
{
|
|
atomic_dec(&server->in_send);
|
|
}
|
|
|
|
static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
|
|
{
|
|
atomic_inc(&server->num_waiters);
|
|
}
|
|
|
|
static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
|
|
{
|
|
atomic_dec(&server->num_waiters);
|
|
}
|
|
|
|
static inline void cifs_save_when_sent(struct mid_q_entry *mid)
|
|
{
|
|
mid->when_sent = jiffies;
|
|
}
|
|
#else
|
|
static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
|
|
{
|
|
}
|
|
static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
|
|
{
|
|
}
|
|
|
|
static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
|
|
{
|
|
}
|
|
|
|
static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
|
|
{
|
|
}
|
|
|
|
static inline void cifs_save_when_sent(struct mid_q_entry *mid)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/* for pending dnotify requests */
|
|
struct dir_notify_req {
|
|
struct list_head lhead;
|
|
__le16 Pid;
|
|
__le16 PidHigh;
|
|
__u16 Mid;
|
|
__u16 Tid;
|
|
__u16 Uid;
|
|
__u16 netfid;
|
|
__u32 filter; /* CompletionFilter (for multishot) */
|
|
int multishot;
|
|
struct file *pfile;
|
|
};
|
|
|
|
struct dfs_info3_param {
|
|
int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
|
|
int path_consumed;
|
|
int server_type;
|
|
int ref_flag;
|
|
char *path_name;
|
|
char *node_name;
|
|
};
|
|
|
|
/*
|
|
* common struct for holding inode info when searching for or updating an
|
|
* inode with new info
|
|
*/
|
|
|
|
#define CIFS_FATTR_DFS_REFERRAL 0x1
|
|
#define CIFS_FATTR_DELETE_PENDING 0x2
|
|
#define CIFS_FATTR_NEED_REVAL 0x4
|
|
#define CIFS_FATTR_INO_COLLISION 0x8
|
|
|
|
struct cifs_fattr {
|
|
u32 cf_flags;
|
|
u32 cf_cifsattrs;
|
|
u64 cf_uniqueid;
|
|
u64 cf_eof;
|
|
u64 cf_bytes;
|
|
u64 cf_createtime;
|
|
uid_t cf_uid;
|
|
gid_t cf_gid;
|
|
umode_t cf_mode;
|
|
dev_t cf_rdev;
|
|
unsigned int cf_nlink;
|
|
unsigned int cf_dtype;
|
|
struct timespec cf_atime;
|
|
struct timespec cf_mtime;
|
|
struct timespec cf_ctime;
|
|
};
|
|
|
|
static inline void free_dfs_info_param(struct dfs_info3_param *param)
|
|
{
|
|
if (param) {
|
|
kfree(param->path_name);
|
|
kfree(param->node_name);
|
|
kfree(param);
|
|
}
|
|
}
|
|
|
|
static inline void free_dfs_info_array(struct dfs_info3_param *param,
|
|
int number_of_items)
|
|
{
|
|
int i;
|
|
if ((number_of_items == 0) || (param == NULL))
|
|
return;
|
|
for (i = 0; i < number_of_items; i++) {
|
|
kfree(param[i].path_name);
|
|
kfree(param[i].node_name);
|
|
}
|
|
kfree(param);
|
|
}
|
|
|
|
#define MID_FREE 0
|
|
#define MID_REQUEST_ALLOCATED 1
|
|
#define MID_REQUEST_SUBMITTED 2
|
|
#define MID_RESPONSE_RECEIVED 4
|
|
#define MID_RETRY_NEEDED 8 /* session closed while this request out */
|
|
#define MID_RESPONSE_MALFORMED 0x10
|
|
#define MID_SHUTDOWN 0x20
|
|
|
|
/* Types of response buffer returned from SendReceive2 */
|
|
#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
|
|
#define CIFS_SMALL_BUFFER 1
|
|
#define CIFS_LARGE_BUFFER 2
|
|
#define CIFS_IOVEC 4 /* array of response buffers */
|
|
|
|
/* Type of Request to SendReceive2 */
|
|
#define CIFS_BLOCKING_OP 1 /* operation can block */
|
|
#define CIFS_ASYNC_OP 2 /* do not wait for response */
|
|
#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
|
|
#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
|
|
#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
|
|
#define CIFS_NO_RESP 0x040 /* no response buffer required */
|
|
|
|
/* Security Flags: indicate type of session setup needed */
|
|
#define CIFSSEC_MAY_SIGN 0x00001
|
|
#define CIFSSEC_MAY_NTLM 0x00002
|
|
#define CIFSSEC_MAY_NTLMV2 0x00004
|
|
#define CIFSSEC_MAY_KRB5 0x00008
|
|
#ifdef CONFIG_CIFS_WEAK_PW_HASH
|
|
#define CIFSSEC_MAY_LANMAN 0x00010
|
|
#define CIFSSEC_MAY_PLNTXT 0x00020
|
|
#else
|
|
#define CIFSSEC_MAY_LANMAN 0
|
|
#define CIFSSEC_MAY_PLNTXT 0
|
|
#endif /* weak passwords */
|
|
#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
|
|
#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
|
|
|
|
#define CIFSSEC_MUST_SIGN 0x01001
|
|
/* note that only one of the following can be set so the
|
|
result of setting MUST flags more than once will be to
|
|
require use of the stronger protocol */
|
|
#define CIFSSEC_MUST_NTLM 0x02002
|
|
#define CIFSSEC_MUST_NTLMV2 0x04004
|
|
#define CIFSSEC_MUST_KRB5 0x08008
|
|
#ifdef CONFIG_CIFS_WEAK_PW_HASH
|
|
#define CIFSSEC_MUST_LANMAN 0x10010
|
|
#define CIFSSEC_MUST_PLNTXT 0x20020
|
|
#ifdef CONFIG_CIFS_UPCALL
|
|
#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
|
|
#else
|
|
#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
|
|
#endif /* UPCALL */
|
|
#else /* do not allow weak pw hash */
|
|
#ifdef CONFIG_CIFS_UPCALL
|
|
#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
|
|
#else
|
|
#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
|
|
#endif /* UPCALL */
|
|
#endif /* WEAK_PW_HASH */
|
|
#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
|
|
#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
|
|
|
|
#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
|
|
#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
|
|
#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
|
|
/*
|
|
*****************************************************************
|
|
* All constants go here
|
|
*****************************************************************
|
|
*/
|
|
|
|
#define UID_HASH (16)
|
|
|
|
/*
|
|
* Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
|
|
* following to be declared.
|
|
*/
|
|
|
|
/****************************************************************************
|
|
* Locking notes. All updates to global variables and lists should be
|
|
* protected by spinlocks or semaphores.
|
|
*
|
|
* Spinlocks
|
|
* ---------
|
|
* GlobalMid_Lock protects:
|
|
* list operations on pending_mid_q and oplockQ
|
|
* updates to XID counters, multiplex id and SMB sequence numbers
|
|
* cifs_file_list_lock protects:
|
|
* list operations on tcp and SMB session lists and tCon lists
|
|
* f_owner.lock protects certain per file struct operations
|
|
* mapping->page_lock protects certain per page operations
|
|
*
|
|
* Semaphores
|
|
* ----------
|
|
* sesSem operations on smb session
|
|
* tconSem operations on tree connection
|
|
* fh_sem file handle reconnection operations
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef DECLARE_GLOBALS_HERE
|
|
#define GLOBAL_EXTERN
|
|
#else
|
|
#define GLOBAL_EXTERN extern
|
|
#endif
|
|
|
|
/*
|
|
* the list of TCP_Server_Info structures, ie each of the sockets
|
|
* connecting our client to a distinct server (ip address), is
|
|
* chained together by cifs_tcp_ses_list. The list of all our SMB
|
|
* sessions (and from that the tree connections) can be found
|
|
* by iterating over cifs_tcp_ses_list
|
|
*/
|
|
GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
|
|
|
|
/*
|
|
* This lock protects the cifs_tcp_ses_list, the list of smb sessions per
|
|
* tcp session, and the list of tcon's per smb session. It also protects
|
|
* the reference counters for the server, smb session, and tcon. Finally,
|
|
* changes to the tcon->tidStatus should be done while holding this lock.
|
|
*/
|
|
GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
|
|
|
|
/*
|
|
* This lock protects the cifs_file->llist and cifs_file->flist
|
|
* list operations, and updates to some flags (cifs_file->invalidHandle)
|
|
* It will be moved to either use the tcon->stat_lock or equivalent later.
|
|
* If cifs_tcp_ses_lock and the lock below are both needed to be held, then
|
|
* the cifs_tcp_ses_lock must be grabbed first and released last.
|
|
*/
|
|
GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
|
|
|
|
#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
|
|
/* Outstanding dir notify requests */
|
|
GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
|
|
/* DirNotify response queue */
|
|
GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
|
|
#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
|
|
|
|
/*
|
|
* Global transaction id (XID) information
|
|
*/
|
|
GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
|
|
GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
|
|
GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
|
|
GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
|
|
/* on midQ entries */
|
|
/*
|
|
* Global counters, updated atomically
|
|
*/
|
|
GLOBAL_EXTERN atomic_t sesInfoAllocCount;
|
|
GLOBAL_EXTERN atomic_t tconInfoAllocCount;
|
|
GLOBAL_EXTERN atomic_t tcpSesAllocCount;
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GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
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GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
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/* Various Debug counters */
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GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
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#ifdef CONFIG_CIFS_STATS2
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GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
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GLOBAL_EXTERN atomic_t totSmBufAllocCount;
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#endif
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GLOBAL_EXTERN atomic_t smBufAllocCount;
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GLOBAL_EXTERN atomic_t midCount;
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/* Misc globals */
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GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
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to be established on existing mount if we
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have the uid/password or Kerberos credential
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or equivalent for current user */
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/* enable or disable oplocks */
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GLOBAL_EXTERN bool enable_oplocks;
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GLOBAL_EXTERN unsigned int lookupCacheEnabled;
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GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
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with more secure ntlmssp2 challenge/resp */
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GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
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GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
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GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
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GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
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GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
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GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
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/* reconnect after this many failed echo attempts */
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GLOBAL_EXTERN unsigned short echo_retries;
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#ifdef CONFIG_CIFS_ACL
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GLOBAL_EXTERN struct rb_root uidtree;
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GLOBAL_EXTERN struct rb_root gidtree;
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GLOBAL_EXTERN spinlock_t siduidlock;
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GLOBAL_EXTERN spinlock_t sidgidlock;
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GLOBAL_EXTERN struct rb_root siduidtree;
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GLOBAL_EXTERN struct rb_root sidgidtree;
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GLOBAL_EXTERN spinlock_t uidsidlock;
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GLOBAL_EXTERN spinlock_t gidsidlock;
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#endif /* CONFIG_CIFS_ACL */
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|
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void cifs_oplock_break(struct work_struct *work);
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extern const struct slow_work_ops cifs_oplock_break_ops;
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#endif /* _CIFS_GLOB_H */
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