1832 lines
61 KiB
C
1832 lines
61 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/mempool.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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#include <uapi/linux/cifs/cifs_mount.h>
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#include "smb2pdu.h"
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#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
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#define CIFS_PORT 445
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#define RFC1001_PORT 139
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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 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
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#define CIFS_MIN_RCV_POOL 4
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#define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
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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.
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*/
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#define CIFS_MAX_REQ 32767
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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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/* maximum length of ip addr as a string (including ipv6 and sctp) */
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#define SERVER_NAME_LENGTH 80
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#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
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/* echo interval in seconds */
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#define SMB_ECHO_INTERVAL_MIN 1
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#define SMB_ECHO_INTERVAL_MAX 600
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#define SMB_ECHO_INTERVAL_DEFAULT 60
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/* maximum number of PDUs in one compound */
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#define MAX_COMPOUND 5
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/*
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* Default number of credits to keep available for SMB3.
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* This value is chosen somewhat arbitrarily. The Windows client
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* defaults to 128 credits, the Windows server allows clients up to
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* 512 credits (or 8K for later versions), and the NetApp server
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* does not limit clients at all. Choose a high enough default value
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* such that the client shouldn't limit performance, but allow mount
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* to override (until you approach 64K, where we limit credits to 65000
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* to reduce possibility of seeing more server credit overflow bugs.
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*/
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#define SMB2_MAX_CREDITS_AVAILABLE 32000
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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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Unspecified = 0, /* not specified */
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LANMAN, /* 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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Kerberos, /* Kerberos via SPNEGO */
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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 crypto_shash *hmacsha256; /* hmac-sha256 hash function */
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struct crypto_shash *cmacaes; /* block-cipher based MAC function */
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struct crypto_shash *sha512; /* sha512 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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struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
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struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
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struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
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struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
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struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
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};
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/* per smb session structure/fields */
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struct ntlmssp_auth {
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bool sesskey_per_smbsess; /* whether session key is per smb session */
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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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/*
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* A smb_rqst represents a complete request to be issued to a server. It's
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* formed by a kvec array, followed by an array of pages. Page data is assumed
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* to start at the beginning of the first page.
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*/
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struct smb_rqst {
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struct kvec *rq_iov; /* array of kvecs */
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unsigned int rq_nvec; /* number of kvecs in array */
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struct page **rq_pages; /* pointer to array of page ptrs */
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unsigned int rq_offset; /* the offset to the 1st page */
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unsigned int rq_npages; /* number pages in array */
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unsigned int rq_pagesz; /* page size to use */
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unsigned int rq_tailsz; /* length of last page */
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};
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enum smb_version {
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Smb_1 = 1,
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Smb_20,
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Smb_21,
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Smb_30,
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Smb_302,
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Smb_311,
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Smb_3any,
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Smb_default,
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Smb_version_err
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};
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struct mid_q_entry;
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struct TCP_Server_Info;
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struct cifsFileInfo;
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struct cifs_ses;
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struct cifs_tcon;
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struct dfs_info3_param;
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struct cifs_fattr;
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struct smb_vol;
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struct cifs_fid;
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struct cifs_readdata;
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struct cifs_writedata;
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struct cifs_io_parms;
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struct cifs_search_info;
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struct cifsInodeInfo;
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struct cifs_open_parms;
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struct smb_version_operations {
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int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
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struct mid_q_entry *);
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bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
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/* setup request: allocate mid, sign message */
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struct mid_q_entry *(*setup_request)(struct cifs_ses *,
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struct smb_rqst *);
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/* setup async request: allocate mid, sign message */
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struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
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struct smb_rqst *);
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/* check response: verify signature, map error */
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int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
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bool);
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void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
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const int);
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void (*set_credits)(struct TCP_Server_Info *, const int);
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int * (*get_credits_field)(struct TCP_Server_Info *, const int);
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unsigned int (*get_credits)(struct mid_q_entry *);
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__u64 (*get_next_mid)(struct TCP_Server_Info *);
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void (*revert_current_mid)(struct TCP_Server_Info *server,
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const unsigned int val);
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/* data offset from read response message */
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unsigned int (*read_data_offset)(char *);
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/*
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* Data length from read response message
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* When in_remaining is true, the returned data length is in
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* message field DataRemaining for out-of-band data read (e.g through
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* Memory Registration RDMA write in SMBD).
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* Otherwise, the returned data length is in message field DataLength.
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*/
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unsigned int (*read_data_length)(char *, bool in_remaining);
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/* map smb to linux error */
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int (*map_error)(char *, bool);
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/* find mid corresponding to the response message */
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struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
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void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
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void (*clear_stats)(struct cifs_tcon *);
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void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
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void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
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/* verify the message */
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int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
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bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
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int (*handle_cancelled_mid)(char *, struct TCP_Server_Info *);
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void (*downgrade_oplock)(struct TCP_Server_Info *,
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struct cifsInodeInfo *, bool);
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/* process transaction2 response */
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bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
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char *, int);
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/* check if we need to negotiate */
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bool (*need_neg)(struct TCP_Server_Info *);
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/* negotiate to the server */
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int (*negotiate)(const unsigned int, struct cifs_ses *);
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/* set negotiated write size */
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unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
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/* set negotiated read size */
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unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
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/* setup smb sessionn */
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int (*sess_setup)(const unsigned int, struct cifs_ses *,
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const struct nls_table *);
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/* close smb session */
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int (*logoff)(const unsigned int, struct cifs_ses *);
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/* connect to a server share */
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int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
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struct cifs_tcon *, const struct nls_table *);
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/* close tree connecion */
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int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
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/* get DFS referrals */
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int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
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const char *, struct dfs_info3_param **,
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unsigned int *, const struct nls_table *, int);
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/* informational QFS call */
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void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
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/* check if a path is accessible or not */
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int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
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struct cifs_sb_info *, const char *);
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/* query path data from the server */
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int (*query_path_info)(const unsigned int, struct cifs_tcon *,
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struct cifs_sb_info *, const char *,
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FILE_ALL_INFO *, bool *, bool *);
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/* query file data from the server */
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int (*query_file_info)(const unsigned int, struct cifs_tcon *,
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struct cifs_fid *, FILE_ALL_INFO *);
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/* get server index number */
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int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
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struct cifs_sb_info *, const char *,
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u64 *uniqueid, FILE_ALL_INFO *);
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/* set size by path */
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int (*set_path_size)(const unsigned int, struct cifs_tcon *,
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const char *, __u64, struct cifs_sb_info *, bool);
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/* set size by file handle */
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int (*set_file_size)(const unsigned int, struct cifs_tcon *,
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struct cifsFileInfo *, __u64, bool);
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/* set attributes */
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int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
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const unsigned int);
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int (*set_compression)(const unsigned int, struct cifs_tcon *,
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struct cifsFileInfo *);
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/* check if we can send an echo or nor */
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bool (*can_echo)(struct TCP_Server_Info *);
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/* send echo request */
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int (*echo)(struct TCP_Server_Info *);
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/* create directory */
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int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
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umode_t mode, struct cifs_tcon *tcon,
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const char *full_path,
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struct cifs_sb_info *cifs_sb);
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int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
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struct cifs_sb_info *);
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/* set info on created directory */
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void (*mkdir_setinfo)(struct inode *, const char *,
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struct cifs_sb_info *, struct cifs_tcon *,
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const unsigned int);
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/* remove directory */
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int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
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struct cifs_sb_info *);
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/* unlink file */
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int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
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struct cifs_sb_info *);
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/* open, rename and delete file */
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int (*rename_pending_delete)(const char *, struct dentry *,
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const unsigned int);
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/* send rename request */
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int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
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const char *, struct cifs_sb_info *);
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/* send create hardlink request */
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int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
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const char *, const char *,
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struct cifs_sb_info *);
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/* query symlink target */
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int (*query_symlink)(const unsigned int, struct cifs_tcon *,
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const char *, char **, struct cifs_sb_info *);
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/* open a file for non-posix mounts */
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int (*open)(const unsigned int, struct cifs_open_parms *,
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__u32 *, FILE_ALL_INFO *);
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/* set fid protocol-specific info */
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void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
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/* close a file */
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void (*close)(const unsigned int, struct cifs_tcon *,
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struct cifs_fid *);
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/* send a flush request to the server */
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int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
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/* async read from the server */
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int (*async_readv)(struct cifs_readdata *);
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/* async write to the server */
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int (*async_writev)(struct cifs_writedata *,
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void (*release)(struct kref *));
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/* sync read from the server */
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int (*sync_read)(const unsigned int, struct cifs_fid *,
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struct cifs_io_parms *, unsigned int *, char **,
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int *);
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/* sync write to the server */
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int (*sync_write)(const unsigned int, struct cifs_fid *,
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struct cifs_io_parms *, unsigned int *, struct kvec *,
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unsigned long);
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/* open dir, start readdir */
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int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
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const char *, struct cifs_sb_info *,
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struct cifs_fid *, __u16,
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struct cifs_search_info *);
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/* continue readdir */
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int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
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struct cifs_fid *,
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__u16, struct cifs_search_info *srch_inf);
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/* close dir */
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int (*close_dir)(const unsigned int, struct cifs_tcon *,
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struct cifs_fid *);
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/* calculate a size of SMB message */
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unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
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/* check for STATUS_PENDING and process it in a positive case */
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bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
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/* check for STATUS_NETWORK_SESSION_EXPIRED */
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bool (*is_session_expired)(char *);
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/* send oplock break response */
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int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
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struct cifsInodeInfo *);
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/* query remote filesystem */
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int (*queryfs)(const unsigned int, struct cifs_tcon *,
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struct kstatfs *);
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/* send mandatory brlock to the server */
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int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
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__u64, __u32, int, int, bool);
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/* unlock range of mandatory locks */
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int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
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const unsigned int);
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/* push brlocks from the cache to the server */
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int (*push_mand_locks)(struct cifsFileInfo *);
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/* get lease key of the inode */
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void (*get_lease_key)(struct inode *, struct cifs_fid *);
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/* set lease key of the inode */
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void (*set_lease_key)(struct inode *, struct cifs_fid *);
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/* generate new lease key */
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void (*new_lease_key)(struct cifs_fid *);
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int (*generate_signingkey)(struct cifs_ses *);
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int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
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int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
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struct cifsFileInfo *src_file);
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int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
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struct cifsFileInfo *src_file, void __user *);
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int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
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struct cifs_sb_info *, const unsigned char *,
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char *, unsigned int *);
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int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
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struct cifs_sb_info *, const unsigned char *,
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char *, unsigned int *);
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/* if we can do cache read operations */
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bool (*is_read_op)(__u32);
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/* set oplock level for the inode */
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void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
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bool *);
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/* create lease context buffer for CREATE request */
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char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
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/* parse lease context buffer and return oplock/epoch info */
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__u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
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ssize_t (*copychunk_range)(const unsigned int,
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struct cifsFileInfo *src_file,
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struct cifsFileInfo *target_file,
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u64 src_off, u64 len, u64 dest_off);
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int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
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struct cifsFileInfo *target_file, u64 src_off, u64 len,
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u64 dest_off);
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int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
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ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
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const unsigned char *, const unsigned char *, char *,
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size_t, struct cifs_sb_info *);
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int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
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const char *, const void *, const __u16,
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const struct nls_table *, struct cifs_sb_info *);
|
|
struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
|
|
const char *, u32 *);
|
|
struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
|
|
const struct cifs_fid *, u32 *);
|
|
int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
|
|
int);
|
|
/* writepages retry size */
|
|
unsigned int (*wp_retry_size)(struct inode *);
|
|
/* get mtu credits */
|
|
int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
|
|
unsigned int *, unsigned int *);
|
|
/* check if we need to issue closedir */
|
|
bool (*dir_needs_close)(struct cifsFileInfo *);
|
|
long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
|
|
loff_t);
|
|
/* init transform request - used for encryption for now */
|
|
int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
|
|
struct smb_rqst *, struct smb_rqst *);
|
|
int (*is_transform_hdr)(void *buf);
|
|
int (*receive_transform)(struct TCP_Server_Info *,
|
|
struct mid_q_entry **, char **, int *);
|
|
enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
|
|
enum securityEnum);
|
|
int (*next_header)(char *);
|
|
};
|
|
|
|
struct smb_version_values {
|
|
char *version_string;
|
|
__u16 protocol_id;
|
|
__u32 req_capabilities;
|
|
__u32 large_lock_type;
|
|
__u32 exclusive_lock_type;
|
|
__u32 shared_lock_type;
|
|
__u32 unlock_lock_type;
|
|
size_t header_preamble_size;
|
|
size_t header_size;
|
|
size_t max_header_size;
|
|
size_t read_rsp_size;
|
|
__le16 lock_cmd;
|
|
unsigned int cap_unix;
|
|
unsigned int cap_nt_find;
|
|
unsigned int cap_large_files;
|
|
__u16 signing_enabled;
|
|
__u16 signing_required;
|
|
size_t create_lease_size;
|
|
};
|
|
|
|
#define HEADER_SIZE(server) (server->vals->header_size)
|
|
#define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
|
|
|
|
struct smb_vol {
|
|
char *username;
|
|
char *password;
|
|
char *domainname;
|
|
char *UNC;
|
|
char *iocharset; /* local code page for mapping to and from Unicode */
|
|
char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
|
|
char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
|
|
kuid_t cred_uid;
|
|
kuid_t linux_uid;
|
|
kgid_t linux_gid;
|
|
kuid_t backupuid;
|
|
kgid_t backupgid;
|
|
umode_t file_mode;
|
|
umode_t dir_mode;
|
|
enum securityEnum sectype; /* sectype requested via mnt opts */
|
|
bool sign; /* was signing requested via mnt opts? */
|
|
bool retry:1;
|
|
bool intr:1;
|
|
bool setuids:1;
|
|
bool setuidfromacl:1;
|
|
bool override_uid:1;
|
|
bool override_gid:1;
|
|
bool dynperm:1;
|
|
bool noperm:1;
|
|
bool no_psx_acl:1; /* set if posix acl support should be disabled */
|
|
bool cifs_acl:1;
|
|
bool backupuid_specified; /* mount option backupuid is specified */
|
|
bool backupgid_specified; /* mount option backupgid is specified */
|
|
bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
|
|
bool server_ino:1; /* use inode numbers from server ie UniqueId */
|
|
bool direct_io:1;
|
|
bool strict_io:1; /* strict cache behavior */
|
|
bool remap:1; /* set to remap seven reserved chars in filenames */
|
|
bool sfu_remap:1; /* remap seven reserved chars ala SFU */
|
|
bool posix_paths:1; /* unset to not ask for posix pathnames. */
|
|
bool no_linux_ext:1;
|
|
bool linux_ext:1;
|
|
bool sfu_emul:1;
|
|
bool nullauth:1; /* attempt to authenticate with null user */
|
|
bool nocase:1; /* request case insensitive filenames */
|
|
bool nobrl:1; /* disable sending byte range locks to srv */
|
|
bool nohandlecache:1; /* disable caching dir handles if srvr probs */
|
|
bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
|
|
bool seal:1; /* request transport encryption on share */
|
|
bool nodfs:1; /* Do not request DFS, even if available */
|
|
bool local_lease:1; /* check leases only on local system, not remote */
|
|
bool noblocksnd:1;
|
|
bool noautotune:1;
|
|
bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
|
|
bool no_lease:1; /* disable requesting leases */
|
|
bool fsc:1; /* enable fscache */
|
|
bool mfsymlinks:1; /* use Minshall+French Symlinks */
|
|
bool multiuser:1;
|
|
bool rwpidforward:1; /* pid forward for read/write operations */
|
|
bool nosharesock:1;
|
|
bool persistent:1;
|
|
bool nopersistent:1;
|
|
bool resilient:1; /* noresilient not required since not fored for CA */
|
|
bool domainauto:1;
|
|
bool rdma:1;
|
|
unsigned int rsize;
|
|
unsigned int wsize;
|
|
bool sockopt_tcp_nodelay:1;
|
|
unsigned long actimeo; /* attribute cache timeout (jiffies) */
|
|
struct smb_version_operations *ops;
|
|
struct smb_version_values *vals;
|
|
char *prepath;
|
|
struct sockaddr_storage dstaddr; /* destination address */
|
|
struct sockaddr_storage srcaddr; /* allow binding to a local IP */
|
|
struct nls_table *local_nls;
|
|
unsigned int echo_interval; /* echo interval in secs */
|
|
__u64 snapshot_time; /* needed for timewarp tokens */
|
|
unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
|
|
};
|
|
|
|
#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
|
|
CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
|
|
CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
|
|
CIFS_MOUNT_MAP_SFM_CHR | \
|
|
CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
|
|
CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
|
|
CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
|
|
CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
|
|
CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
|
|
CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
|
|
CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
|
|
|
|
#define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
|
|
SB_NODEV | SB_SYNCHRONOUS)
|
|
|
|
struct cifs_mnt_data {
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct smb_vol *vol;
|
|
int flags;
|
|
};
|
|
|
|
static inline unsigned int
|
|
get_rfc1002_length(void *buf)
|
|
{
|
|
return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
|
|
}
|
|
|
|
static inline void
|
|
inc_rfc1001_len(void *buf, int count)
|
|
{
|
|
be32_add_cpu((__be32 *)buf, count);
|
|
}
|
|
|
|
struct TCP_Server_Info {
|
|
struct list_head tcp_ses_list;
|
|
struct list_head smb_ses_list;
|
|
int srv_count; /* reference counter */
|
|
/* 15 character server name + 0x20 16th byte indicating type = srv */
|
|
char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
|
|
struct smb_version_operations *ops;
|
|
struct smb_version_values *vals;
|
|
enum statusEnum tcpStatus; /* what we think the status is */
|
|
char *hostname; /* hostname portion of UNC string */
|
|
struct socket *ssocket;
|
|
struct sockaddr_storage dstaddr;
|
|
struct sockaddr_storage srcaddr; /* locally bind to this IP */
|
|
#ifdef CONFIG_NET_NS
|
|
struct net *net;
|
|
#endif
|
|
wait_queue_head_t response_q;
|
|
wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
|
|
struct list_head pending_mid_q;
|
|
bool noblocksnd; /* use blocking sendmsg */
|
|
bool noautotune; /* do not autotune send buf sizes */
|
|
bool tcp_nodelay;
|
|
unsigned int credits; /* send no more requests at once */
|
|
unsigned int max_credits; /* can override large 32000 default at mnt */
|
|
unsigned int in_flight; /* number of requests on the wire to server */
|
|
spinlock_t req_lock; /* protect the two values above */
|
|
struct mutex srv_mutex;
|
|
struct task_struct *tsk;
|
|
char server_GUID[16];
|
|
__u16 sec_mode;
|
|
bool sign; /* is signing enabled on this connection? */
|
|
bool session_estab; /* mark when very first sess is established */
|
|
int echo_credits; /* echo reserved slots */
|
|
int oplock_credits; /* oplock break reserved slots */
|
|
bool echoes:1; /* enable echoes */
|
|
__u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
|
|
u16 dialect; /* dialect index that server chose */
|
|
bool oplocks:1; /* enable oplocks */
|
|
unsigned int maxReq; /* Clients should submit no more */
|
|
/* than maxReq distinct unanswered SMBs to the server when using */
|
|
/* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
|
|
unsigned int maxBuf; /* maxBuf specifies the maximum */
|
|
/* message size the server can send or receive for non-raw SMBs */
|
|
/* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
|
|
/* when socket is setup (and during reconnect) before NegProt sent */
|
|
unsigned int max_rw; /* maxRw specifies the maximum */
|
|
/* message size the server can send or receive for */
|
|
/* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
|
|
unsigned int capabilities; /* selective disabling of caps by smb sess */
|
|
int timeAdj; /* Adjust for difference in server time zone in sec */
|
|
__u64 CurrentMid; /* multiplex id - rotating counter */
|
|
char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
|
|
/* 16th byte of RFC1001 workstation name is always null */
|
|
char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
|
|
__u32 sequence_number; /* for signing, protected by srv_mutex */
|
|
struct session_key session_key;
|
|
unsigned long lstrp; /* when we got last response from this server */
|
|
struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
|
|
#define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
|
|
#define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
|
|
#define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
|
|
char negflavor; /* NEGOTIATE response flavor */
|
|
/* extended security flavors that server supports */
|
|
bool sec_ntlmssp; /* supports NTLMSSP */
|
|
bool sec_kerberosu2u; /* supports U2U Kerberos */
|
|
bool sec_kerberos; /* supports plain Kerberos */
|
|
bool sec_mskerberos; /* supports legacy MS Kerberos */
|
|
bool large_buf; /* is current buffer large? */
|
|
/* use SMBD connection instead of socket */
|
|
bool rdma;
|
|
/* point to the SMBD connection if RDMA is used instead of socket */
|
|
struct smbd_connection *smbd_conn;
|
|
struct delayed_work echo; /* echo ping workqueue job */
|
|
char *smallbuf; /* pointer to current "small" buffer */
|
|
char *bigbuf; /* pointer to current "big" buffer */
|
|
/* Total size of this PDU. Only valid from cifs_demultiplex_thread */
|
|
unsigned int pdu_size;
|
|
unsigned int total_read; /* total amount of data read in this pass */
|
|
#ifdef CONFIG_CIFS_FSCACHE
|
|
struct fscache_cookie *fscache; /* client index cache cookie */
|
|
#endif
|
|
#ifdef CONFIG_CIFS_STATS2
|
|
atomic_t in_send; /* requests trying to send */
|
|
atomic_t num_waiters; /* blocked waiting to get in sendrecv */
|
|
atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
|
|
#endif /* STATS2 */
|
|
unsigned int max_read;
|
|
unsigned int max_write;
|
|
__le16 cipher_type;
|
|
/* save initital negprot hash */
|
|
__u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
|
|
bool posix_ext_supported;
|
|
struct delayed_work reconnect; /* reconnect workqueue job */
|
|
struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
|
|
unsigned long echo_interval;
|
|
};
|
|
|
|
static inline unsigned int
|
|
in_flight(struct TCP_Server_Info *server)
|
|
{
|
|
unsigned int num;
|
|
spin_lock(&server->req_lock);
|
|
num = server->in_flight;
|
|
spin_unlock(&server->req_lock);
|
|
return num;
|
|
}
|
|
|
|
static inline bool
|
|
has_credits(struct TCP_Server_Info *server, int *credits)
|
|
{
|
|
int num;
|
|
spin_lock(&server->req_lock);
|
|
num = *credits;
|
|
spin_unlock(&server->req_lock);
|
|
return num > 0;
|
|
}
|
|
|
|
static inline void
|
|
add_credits(struct TCP_Server_Info *server, const unsigned int add,
|
|
const int optype)
|
|
{
|
|
server->ops->add_credits(server, add, optype);
|
|
}
|
|
|
|
static inline void
|
|
add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
|
|
const int optype)
|
|
{
|
|
if (add) {
|
|
server->ops->add_credits(server, add, optype);
|
|
wake_up(&server->request_q);
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
set_credits(struct TCP_Server_Info *server, const int val)
|
|
{
|
|
server->ops->set_credits(server, val);
|
|
}
|
|
|
|
static inline __le64
|
|
get_next_mid64(struct TCP_Server_Info *server)
|
|
{
|
|
return cpu_to_le64(server->ops->get_next_mid(server));
|
|
}
|
|
|
|
static inline __le16
|
|
get_next_mid(struct TCP_Server_Info *server)
|
|
{
|
|
__u16 mid = server->ops->get_next_mid(server);
|
|
/*
|
|
* The value in the SMB header should be little endian for easy
|
|
* on-the-wire decoding.
|
|
*/
|
|
return cpu_to_le16(mid);
|
|
}
|
|
|
|
static inline void
|
|
revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
|
|
{
|
|
if (server->ops->revert_current_mid)
|
|
server->ops->revert_current_mid(server, val);
|
|
}
|
|
|
|
static inline void
|
|
revert_current_mid_from_hdr(struct TCP_Server_Info *server,
|
|
const struct smb2_sync_hdr *shdr)
|
|
{
|
|
unsigned int num = le16_to_cpu(shdr->CreditCharge);
|
|
|
|
return revert_current_mid(server, num > 0 ? num : 1);
|
|
}
|
|
|
|
static inline __u16
|
|
get_mid(const struct smb_hdr *smb)
|
|
{
|
|
return le16_to_cpu(smb->Mid);
|
|
}
|
|
|
|
static inline bool
|
|
compare_mid(__u16 mid, const struct smb_hdr *smb)
|
|
{
|
|
return mid == le16_to_cpu(smb->Mid);
|
|
}
|
|
|
|
/*
|
|
* When the server supports very large reads and writes via POSIX extensions,
|
|
* we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
|
|
* including the RFC1001 length.
|
|
*
|
|
* Note that this might make for "interesting" allocation problems during
|
|
* writeback however as we have to allocate an array of pointers for the
|
|
* pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
|
|
*
|
|
* For reads, there is a similar problem as we need to allocate an array
|
|
* of kvecs to handle the receive, though that should only need to be done
|
|
* once.
|
|
*/
|
|
#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
|
|
#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
|
|
|
|
/*
|
|
* When the server doesn't allow large posix writes, only allow a rsize/wsize
|
|
* of 2^17-1 minus the size of the call header. That allows for a read or
|
|
* write up to the maximum size described by RFC1002.
|
|
*/
|
|
#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
|
|
#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
|
|
|
|
/*
|
|
* The default wsize is 1M. find_get_pages seems to return a maximum of 256
|
|
* pages in a single call. With PAGE_SIZE == 4k, this means we can fill
|
|
* a single wsize request with a single call.
|
|
*/
|
|
#define CIFS_DEFAULT_IOSIZE (1024 * 1024)
|
|
|
|
/*
|
|
* Windows only supports a max of 60kb reads and 65535 byte writes. Default to
|
|
* those values when posix extensions aren't in force. In actuality here, we
|
|
* use 65536 to allow for a write that is a multiple of 4k. Most servers seem
|
|
* to be ok with the extra byte even though Windows doesn't send writes that
|
|
* are that large.
|
|
*
|
|
* Citation:
|
|
*
|
|
* http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
|
|
*/
|
|
#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
|
|
#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
|
|
|
|
/*
|
|
* Macros to allow the TCP_Server_Info->net field and related code to drop out
|
|
* when CONFIG_NET_NS isn't set.
|
|
*/
|
|
|
|
#ifdef CONFIG_NET_NS
|
|
|
|
static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
|
|
{
|
|
return srv->net;
|
|
}
|
|
|
|
static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
|
|
{
|
|
srv->net = net;
|
|
}
|
|
|
|
#else
|
|
|
|
static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
|
|
{
|
|
return &init_net;
|
|
}
|
|
|
|
static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
struct cifs_server_iface {
|
|
size_t speed;
|
|
unsigned int rdma_capable : 1;
|
|
unsigned int rss_capable : 1;
|
|
struct sockaddr_storage sockaddr;
|
|
};
|
|
|
|
/*
|
|
* Session structure. One of these for each uid session with a particular host
|
|
*/
|
|
struct cifs_ses {
|
|
struct list_head smb_ses_list;
|
|
struct list_head tcon_list;
|
|
struct cifs_tcon *tcon_ipc;
|
|
struct mutex session_mutex;
|
|
struct TCP_Server_Info *server; /* pointer to server info */
|
|
int ses_count; /* reference counter */
|
|
enum statusEnum status;
|
|
unsigned overrideSecFlg; /* if non-zero override global sec flags */
|
|
char *serverOS; /* name of operating system underlying server */
|
|
char *serverNOS; /* name of network operating system of server */
|
|
char *serverDomain; /* security realm of server */
|
|
__u64 Suid; /* remote smb uid */
|
|
kuid_t linux_uid; /* overriding owner of files on the mount */
|
|
kuid_t cred_uid; /* owner of credentials */
|
|
unsigned int capabilities;
|
|
char serverName[SERVER_NAME_LEN_WITH_NULL];
|
|
char *user_name; /* must not be null except during init of sess
|
|
and after mount option parsing we fill it */
|
|
char *domainName;
|
|
char *password;
|
|
struct session_key auth_key;
|
|
struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
|
|
enum securityEnum sectype; /* what security flavor was specified? */
|
|
bool sign; /* is signing required? */
|
|
bool need_reconnect:1; /* connection reset, uid now invalid */
|
|
bool domainAuto:1;
|
|
__u16 session_flags;
|
|
__u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
|
|
__u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
|
|
__u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
|
|
__u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
|
|
|
|
/*
|
|
* Network interfaces available on the server this session is
|
|
* connected to.
|
|
*
|
|
* Other channels can be opened by connecting and binding this
|
|
* session to interfaces from this list.
|
|
*
|
|
* iface_lock should be taken when accessing any of these fields
|
|
*/
|
|
spinlock_t iface_lock;
|
|
struct cifs_server_iface *iface_list;
|
|
size_t iface_count;
|
|
unsigned long iface_last_update; /* jiffies */
|
|
};
|
|
|
|
static inline bool
|
|
cap_unix(struct cifs_ses *ses)
|
|
{
|
|
return ses->server->vals->cap_unix & ses->capabilities;
|
|
}
|
|
|
|
struct cached_fid {
|
|
bool is_valid:1; /* Do we have a useable root fid */
|
|
struct kref refcount;
|
|
struct cifs_fid *fid;
|
|
struct mutex fid_mutex;
|
|
struct cifs_tcon *tcon;
|
|
struct work_struct lease_break;
|
|
};
|
|
|
|
/*
|
|
* there is one of these for each connection to a resource on a particular
|
|
* session
|
|
*/
|
|
struct cifs_tcon {
|
|
struct list_head tcon_list;
|
|
int tc_count;
|
|
struct list_head rlist; /* reconnect list */
|
|
struct list_head openFileList;
|
|
spinlock_t open_file_lock; /* protects list above */
|
|
struct cifs_ses *ses; /* pointer to session associated with */
|
|
char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
|
|
char *nativeFileSystem;
|
|
char *password; /* for share-level security */
|
|
__u32 tid; /* The 4 byte tree id */
|
|
__u16 Flags; /* optional support bits */
|
|
enum statusEnum tidStatus;
|
|
atomic_t num_smbs_sent;
|
|
union {
|
|
struct {
|
|
atomic_t num_writes;
|
|
atomic_t num_reads;
|
|
atomic_t num_flushes;
|
|
atomic_t num_oplock_brks;
|
|
atomic_t num_opens;
|
|
atomic_t num_closes;
|
|
atomic_t num_deletes;
|
|
atomic_t num_mkdirs;
|
|
atomic_t num_posixopens;
|
|
atomic_t num_posixmkdirs;
|
|
atomic_t num_rmdirs;
|
|
atomic_t num_renames;
|
|
atomic_t num_t2renames;
|
|
atomic_t num_ffirst;
|
|
atomic_t num_fnext;
|
|
atomic_t num_fclose;
|
|
atomic_t num_hardlinks;
|
|
atomic_t num_symlinks;
|
|
atomic_t num_locks;
|
|
atomic_t num_acl_get;
|
|
atomic_t num_acl_set;
|
|
} cifs_stats;
|
|
struct {
|
|
atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
|
|
atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
|
|
} smb2_stats;
|
|
} stats;
|
|
__u64 bytes_read;
|
|
__u64 bytes_written;
|
|
spinlock_t stat_lock; /* protects the two fields above */
|
|
FILE_SYSTEM_DEVICE_INFO fsDevInfo;
|
|
FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
|
|
FILE_SYSTEM_UNIX_INFO fsUnixInfo;
|
|
bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
|
|
bool pipe:1; /* set if connection to pipe share */
|
|
bool print:1; /* set if connection to printer share */
|
|
bool retry:1;
|
|
bool nocase:1;
|
|
bool nohandlecache:1; /* if strange server resource prob can turn off */
|
|
bool seal:1; /* transport encryption for this mounted share */
|
|
bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
|
|
for this mount even if server would support */
|
|
bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
|
|
bool local_lease:1; /* check leases (only) on local system not remote */
|
|
bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
|
|
bool broken_sparse_sup; /* if server or share does not support sparse */
|
|
bool need_reconnect:1; /* connection reset, tid now invalid */
|
|
bool need_reopen_files:1; /* need to reopen tcon file handles */
|
|
bool use_resilient:1; /* use resilient instead of durable handles */
|
|
bool use_persistent:1; /* use persistent instead of durable handles */
|
|
bool no_lease:1; /* Do not request leases on files or directories */
|
|
__le32 capabilities;
|
|
__u32 share_flags;
|
|
__u32 maximal_access;
|
|
__u32 vol_serial_number;
|
|
__le64 vol_create_time;
|
|
__u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
|
|
__u32 ss_flags; /* sector size flags */
|
|
__u32 perf_sector_size; /* best sector size for perf */
|
|
__u32 max_chunks;
|
|
__u32 max_bytes_chunk;
|
|
__u32 max_bytes_copy;
|
|
#ifdef CONFIG_CIFS_FSCACHE
|
|
u64 resource_id; /* server resource id */
|
|
struct fscache_cookie *fscache; /* cookie for share */
|
|
#endif
|
|
struct list_head pending_opens; /* list of incomplete opens */
|
|
struct cached_fid crfid; /* Cached root fid */
|
|
/* BB add field for back pointer to sb struct(s)? */
|
|
};
|
|
|
|
/*
|
|
* This is a refcounted and timestamped container for a tcon pointer. The
|
|
* container holds a tcon reference. It is considered safe to free one of
|
|
* these when the tl_count goes to 0. The tl_time is the time of the last
|
|
* "get" on the container.
|
|
*/
|
|
struct tcon_link {
|
|
struct rb_node tl_rbnode;
|
|
kuid_t tl_uid;
|
|
unsigned long tl_flags;
|
|
#define TCON_LINK_MASTER 0
|
|
#define TCON_LINK_PENDING 1
|
|
#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);
|
|
extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
|
|
|
|
static inline struct cifs_tcon *
|
|
tlink_tcon(struct tcon_link *tlink)
|
|
{
|
|
return tlink->tl_tcon;
|
|
}
|
|
|
|
static inline struct tcon_link *
|
|
cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
|
|
{
|
|
return cifs_sb->master_tlink;
|
|
}
|
|
|
|
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);
|
|
|
|
#define CIFS_OPLOCK_NO_CHANGE 0xfe
|
|
|
|
struct cifs_pending_open {
|
|
struct list_head olist;
|
|
struct tcon_link *tlink;
|
|
__u8 lease_key[16];
|
|
__u32 oplock;
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
struct list_head blist; /* pointer to locks blocked on this */
|
|
wait_queue_head_t block_q;
|
|
__u64 offset;
|
|
__u64 length;
|
|
__u32 pid;
|
|
__u32 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 cifs_open_parms {
|
|
struct cifs_tcon *tcon;
|
|
struct cifs_sb_info *cifs_sb;
|
|
int disposition;
|
|
int desired_access;
|
|
int create_options;
|
|
const char *path;
|
|
struct cifs_fid *fid;
|
|
umode_t mode;
|
|
bool reconnect:1;
|
|
};
|
|
|
|
struct cifs_fid {
|
|
__u16 netfid;
|
|
__u64 persistent_fid; /* persist file id for smb2 */
|
|
__u64 volatile_fid; /* volatile file id for smb2 */
|
|
__u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
|
|
__u8 create_guid[16];
|
|
struct cifs_pending_open *pending_open;
|
|
unsigned int epoch;
|
|
bool purge_cache;
|
|
};
|
|
|
|
struct cifs_fid_locks {
|
|
struct list_head llist;
|
|
struct cifsFileInfo *cfile; /* fid that owns locks */
|
|
struct list_head locks; /* locks held by fid above */
|
|
};
|
|
|
|
struct cifsFileInfo {
|
|
/* following two lists are protected by tcon->open_file_lock */
|
|
struct list_head tlist; /* pointer to next fid owned by tcon */
|
|
struct list_head flist; /* next fid (file instance) for this inode */
|
|
/* lock list below protected by cifsi->lock_sem */
|
|
struct cifs_fid_locks *llist; /* brlocks held by this fid */
|
|
kuid_t uid; /* allows finding which FileInfo structure */
|
|
__u32 pid; /* process id who opened file */
|
|
struct cifs_fid fid; /* file id from remote */
|
|
struct list_head rlist; /* reconnect list */
|
|
/* BB add lock scope info here if needed */ ;
|
|
/* lock scope id (0 if none) */
|
|
struct dentry *dentry;
|
|
struct tcon_link *tlink;
|
|
unsigned int f_flags;
|
|
bool invalidHandle:1; /* file closed via session abend */
|
|
bool oplock_break_cancelled:1;
|
|
int count;
|
|
spinlock_t file_info_lock; /* protects four flag/count fields above */
|
|
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;
|
|
__u64 persistent_fid; /* persist file id for smb2 */
|
|
__u64 volatile_fid; /* volatile file id for smb2 */
|
|
__u32 pid;
|
|
__u64 offset;
|
|
unsigned int length;
|
|
struct cifs_tcon *tcon;
|
|
};
|
|
|
|
struct cifs_aio_ctx {
|
|
struct kref refcount;
|
|
struct list_head list;
|
|
struct mutex aio_mutex;
|
|
struct completion done;
|
|
struct iov_iter iter;
|
|
struct kiocb *iocb;
|
|
struct cifsFileInfo *cfile;
|
|
struct bio_vec *bv;
|
|
loff_t pos;
|
|
unsigned int npages;
|
|
ssize_t rc;
|
|
unsigned int len;
|
|
unsigned int total_len;
|
|
bool should_dirty;
|
|
};
|
|
|
|
struct cifs_readdata;
|
|
|
|
/* asynchronous read support */
|
|
struct cifs_readdata {
|
|
struct kref refcount;
|
|
struct list_head list;
|
|
struct completion done;
|
|
struct cifsFileInfo *cfile;
|
|
struct address_space *mapping;
|
|
struct cifs_aio_ctx *ctx;
|
|
__u64 offset;
|
|
unsigned int bytes;
|
|
unsigned int got_bytes;
|
|
pid_t pid;
|
|
int result;
|
|
struct work_struct work;
|
|
int (*read_into_pages)(struct TCP_Server_Info *server,
|
|
struct cifs_readdata *rdata,
|
|
unsigned int len);
|
|
int (*copy_into_pages)(struct TCP_Server_Info *server,
|
|
struct cifs_readdata *rdata,
|
|
struct iov_iter *iter);
|
|
struct kvec iov[2];
|
|
#ifdef CONFIG_CIFS_SMB_DIRECT
|
|
struct smbd_mr *mr;
|
|
#endif
|
|
unsigned int pagesz;
|
|
unsigned int page_offset;
|
|
unsigned int tailsz;
|
|
unsigned int credits;
|
|
unsigned int nr_pages;
|
|
struct page **pages;
|
|
};
|
|
|
|
struct cifs_writedata;
|
|
|
|
/* asynchronous write support */
|
|
struct cifs_writedata {
|
|
struct kref refcount;
|
|
struct list_head list;
|
|
struct completion done;
|
|
enum writeback_sync_modes sync_mode;
|
|
struct work_struct work;
|
|
struct cifsFileInfo *cfile;
|
|
struct cifs_aio_ctx *ctx;
|
|
__u64 offset;
|
|
pid_t pid;
|
|
unsigned int bytes;
|
|
int result;
|
|
#ifdef CONFIG_CIFS_SMB_DIRECT
|
|
struct smbd_mr *mr;
|
|
#endif
|
|
unsigned int pagesz;
|
|
unsigned int page_offset;
|
|
unsigned int tailsz;
|
|
unsigned int credits;
|
|
unsigned int nr_pages;
|
|
struct page **pages;
|
|
};
|
|
|
|
/*
|
|
* Take a reference on the file private data. Must be called with
|
|
* cfile->file_info_lock held.
|
|
*/
|
|
static inline void
|
|
cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
|
|
{
|
|
++cifs_file->count;
|
|
}
|
|
|
|
struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
|
|
void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr);
|
|
void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
|
|
|
|
#define CIFS_CACHE_READ_FLG 1
|
|
#define CIFS_CACHE_HANDLE_FLG 2
|
|
#define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
|
|
#define CIFS_CACHE_WRITE_FLG 4
|
|
#define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
|
|
#define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
|
|
|
|
#define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
|
|
#define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
|
|
#define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
|
|
|
|
/*
|
|
* One of these for each file inode
|
|
*/
|
|
|
|
struct cifsInodeInfo {
|
|
bool can_cache_brlcks;
|
|
struct list_head llist; /* locks helb by this inode */
|
|
/*
|
|
* NOTE: Some code paths call down_read(lock_sem) twice, so
|
|
* we must always use use cifs_down_write() instead of down_write()
|
|
* for this semaphore to avoid deadlocks.
|
|
*/
|
|
struct rw_semaphore lock_sem; /* protect the fields above */
|
|
/* BB add in lists for dirty pages i.e. write caching info for oplock */
|
|
struct list_head openFileList;
|
|
spinlock_t open_file_lock; /* protects openFileList */
|
|
__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
|
|
unsigned int oplock; /* oplock/lease level we have */
|
|
unsigned int epoch; /* used to track lease state changes */
|
|
#define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
|
|
#define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
|
|
#define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
|
|
#define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
|
|
#define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
|
|
#define CIFS_INO_LOCK (5) /* lock bit for synchronization */
|
|
unsigned long flags;
|
|
spinlock_t writers_lock;
|
|
unsigned int writers; /* Number of writers on this inode */
|
|
unsigned long time; /* jiffies of last update of inode */
|
|
u64 server_eof; /* current file size on server -- protected by i_lock */
|
|
u64 uniqueid; /* server inode number */
|
|
u64 createtime; /* creation time on server */
|
|
__u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
|
|
#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 struct cifs_sb_info *
|
|
CIFS_FILE_SB(struct file *file)
|
|
{
|
|
return CIFS_SB(file_inode(file)->i_sb);
|
|
}
|
|
|
|
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)
|
|
{
|
|
char old_delim, *pos;
|
|
|
|
if (delim == '/')
|
|
old_delim = '\\';
|
|
else
|
|
old_delim = '/';
|
|
|
|
pos = path;
|
|
while ((pos = strchr(pos, old_delim)))
|
|
*pos = delim;
|
|
}
|
|
|
|
#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);
|
|
}
|
|
|
|
|
|
/*
|
|
* This is the prototype for the mid receive function. This function is for
|
|
* receiving the rest of the SMB frame, starting with the WordCount (which is
|
|
* just after the MID in struct smb_hdr). Note:
|
|
*
|
|
* - This will be called by cifsd, with no locks held.
|
|
* - The mid will still be on the pending_mid_q.
|
|
* - mid->resp_buf will point to the current buffer.
|
|
*
|
|
* Returns zero on a successful receive, or an error. The receive state in
|
|
* the TCP_Server_Info will also be updated.
|
|
*/
|
|
typedef int (mid_receive_t)(struct TCP_Server_Info *server,
|
|
struct mid_q_entry *mid);
|
|
|
|
/*
|
|
* This is the prototype for the mid callback function. This is called once the
|
|
* mid has been received off of the socket. 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);
|
|
|
|
/*
|
|
* This is the protopyte for mid handle function. This is called once the mid
|
|
* has been recognized after decryption of the message.
|
|
*/
|
|
typedef int (mid_handle_t)(struct TCP_Server_Info *server,
|
|
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 */
|
|
struct kref refcount;
|
|
struct TCP_Server_Info *server; /* server corresponding to this mid */
|
|
__u64 mid; /* multiplex id */
|
|
__u16 credits; /* number of credits consumed by this mid */
|
|
__u32 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_receive_t *receive; /* call receive callback */
|
|
mid_callback_t *callback; /* call completion callback */
|
|
mid_handle_t *handle; /* call handle mid callback */
|
|
void *callback_data; /* general purpose pointer for callback */
|
|
void *resp_buf; /* pointer to received SMB header */
|
|
unsigned int resp_buf_size;
|
|
int mid_state; /* wish this were enum but can not pass to wait_event */
|
|
unsigned int mid_flags;
|
|
__le16 command; /* smb command code */
|
|
bool large_buf:1; /* if valid response, is pointer to large buf */
|
|
bool multiRsp:1; /* multiple trans2 responses for one request */
|
|
bool multiEnd:1; /* both received */
|
|
bool decrypted:1; /* decrypted entry */
|
|
};
|
|
|
|
struct close_cancelled_open {
|
|
struct cifs_fid fid;
|
|
struct cifs_tcon *tcon;
|
|
struct work_struct work;
|
|
};
|
|
|
|
/* 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
|
|
#define CIFS_FATTR_UNKNOWN_NLINK 0x10
|
|
#define CIFS_FATTR_FAKE_ROOT_INO 0x20
|
|
|
|
struct cifs_fattr {
|
|
u32 cf_flags;
|
|
u32 cf_cifsattrs;
|
|
u64 cf_uniqueid;
|
|
u64 cf_eof;
|
|
u64 cf_bytes;
|
|
u64 cf_createtime;
|
|
kuid_t cf_uid;
|
|
kgid_t cf_gid;
|
|
umode_t cf_mode;
|
|
dev_t cf_rdev;
|
|
unsigned int cf_nlink;
|
|
unsigned int cf_dtype;
|
|
struct timespec64 cf_atime;
|
|
struct timespec64 cf_mtime;
|
|
struct timespec64 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);
|
|
}
|
|
|
|
static inline bool is_interrupt_error(int error)
|
|
{
|
|
switch (error) {
|
|
case -EINTR:
|
|
case -ERESTARTSYS:
|
|
case -ERESTARTNOHAND:
|
|
case -ERESTARTNOINTR:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static inline bool is_retryable_error(int error)
|
|
{
|
|
if (is_interrupt_error(error) || error == -EAGAIN)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
#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
|
|
|
|
/* Flags */
|
|
#define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
|
|
#define MID_DELETED 2 /* Mid has been dequeued/deleted */
|
|
|
|
/* 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 */
|
|
|
|
/* Type of request operation */
|
|
#define CIFS_ECHO_OP 0x080 /* echo request */
|
|
#define CIFS_OBREAK_OP 0x0100 /* oplock break request */
|
|
#define CIFS_NEG_OP 0x0200 /* negotiate request */
|
|
#define CIFS_OP_MASK 0x0380 /* mask request type */
|
|
|
|
#define CIFS_HAS_CREDITS 0x0400 /* already has credits */
|
|
#define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
|
|
|
|
/* 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 */
|
|
#define CIFSSEC_MUST_LANMAN 0
|
|
#define CIFSSEC_MUST_PLNTXT 0
|
|
#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_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
|
|
#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
|
|
* tcp_ses_lock protects:
|
|
* list operations on tcp and SMB session lists
|
|
* tcon->open_file_lock protects the list of open files hanging off the tcon
|
|
* inode->open_file_lock protects the openFileList hanging off the inode
|
|
* cfile->file_info_lock protects counters and fields in cifs file struct
|
|
* f_owner.lock protects certain per file struct operations
|
|
* mapping->page_lock protects certain per page operations
|
|
*
|
|
* Note that the cifs_tcon.open_file_lock should be taken before
|
|
* not after the cifsInodeInfo.open_file_lock
|
|
*
|
|
* 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.
|
|
* generally the locks should be taken in order tcp_ses_lock before
|
|
* tcon->open_file_lock and that before file->file_info_lock since the
|
|
* structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
|
|
*/
|
|
GLOBAL_EXTERN spinlock_t cifs_tcp_ses_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;
|
|
GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
|
|
GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
|
|
|
|
/* Various Debug counters */
|
|
GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
|
|
#ifdef CONFIG_CIFS_STATS2
|
|
GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
|
|
GLOBAL_EXTERN atomic_t totSmBufAllocCount;
|
|
#endif
|
|
GLOBAL_EXTERN atomic_t smBufAllocCount;
|
|
GLOBAL_EXTERN atomic_t midCount;
|
|
|
|
/* Misc globals */
|
|
extern bool enable_oplocks; /* enable or disable oplocks */
|
|
extern bool lookupCacheEnabled;
|
|
extern unsigned int global_secflags; /* if on, session setup sent
|
|
with more secure ntlmssp2 challenge/resp */
|
|
extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
|
|
extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
|
|
extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
|
|
extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
|
|
extern unsigned int cifs_min_small; /* min size of small buf pool */
|
|
extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
|
|
extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
|
|
|
|
#ifdef CONFIG_CIFS_ACL
|
|
GLOBAL_EXTERN struct rb_root uidtree;
|
|
GLOBAL_EXTERN struct rb_root gidtree;
|
|
GLOBAL_EXTERN spinlock_t siduidlock;
|
|
GLOBAL_EXTERN spinlock_t sidgidlock;
|
|
GLOBAL_EXTERN struct rb_root siduidtree;
|
|
GLOBAL_EXTERN struct rb_root sidgidtree;
|
|
GLOBAL_EXTERN spinlock_t uidsidlock;
|
|
GLOBAL_EXTERN spinlock_t gidsidlock;
|
|
#endif /* CONFIG_CIFS_ACL */
|
|
|
|
void cifs_oplock_break(struct work_struct *work);
|
|
void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
|
|
|
|
extern const struct slow_work_ops cifs_oplock_break_ops;
|
|
extern struct workqueue_struct *cifsiod_wq;
|
|
extern struct workqueue_struct *cifsoplockd_wq;
|
|
extern __u32 cifs_lock_secret;
|
|
|
|
extern mempool_t *cifs_mid_poolp;
|
|
|
|
/* Operations for different SMB versions */
|
|
#define SMB1_VERSION_STRING "1.0"
|
|
extern struct smb_version_operations smb1_operations;
|
|
extern struct smb_version_values smb1_values;
|
|
#define SMB20_VERSION_STRING "2.0"
|
|
extern struct smb_version_operations smb20_operations;
|
|
extern struct smb_version_values smb20_values;
|
|
#define SMB21_VERSION_STRING "2.1"
|
|
extern struct smb_version_operations smb21_operations;
|
|
extern struct smb_version_values smb21_values;
|
|
#define SMBDEFAULT_VERSION_STRING "default"
|
|
extern struct smb_version_values smbdefault_values;
|
|
#define SMB3ANY_VERSION_STRING "3"
|
|
extern struct smb_version_values smb3any_values;
|
|
#define SMB30_VERSION_STRING "3.0"
|
|
extern struct smb_version_operations smb30_operations;
|
|
extern struct smb_version_values smb30_values;
|
|
#define SMB302_VERSION_STRING "3.02"
|
|
/*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
|
|
extern struct smb_version_values smb302_values;
|
|
#define SMB311_VERSION_STRING "3.1.1"
|
|
#define ALT_SMB311_VERSION_STRING "3.11"
|
|
extern struct smb_version_operations smb311_operations;
|
|
extern struct smb_version_values smb311_values;
|
|
#endif /* _CIFS_GLOB_H */
|