2223 строки
74 KiB
C
2223 строки
74 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 */
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/*
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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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*/
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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/inet.h>
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#include <linux/slab.h>
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#include <linux/scatterlist.h>
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#include <linux/mm.h>
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#include <linux/mempool.h>
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#include <linux/workqueue.h>
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#include <linux/utsname.h>
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#include <linux/sched/mm.h>
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#include <linux/netfs.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 <uapi/linux/cifs/cifs_mount.h>
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#include "../smbfs_common/smb2pdu.h"
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#include "smb2pdu.h"
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#define SMB_PATH_MAX 260
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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 persistent and resilient handle timeout (milliseconds).
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* Windows durable max was 960000 (16 minutes)
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*/
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#define SMB3_MAX_HANDLE_TIMEOUT 960000
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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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/* dns resolution intervals in seconds */
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#define SMB_DNS_RESOLVE_INTERVAL_MIN 120
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#define SMB_DNS_RESOLVE_INTERVAL_DEFAULT 600
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/* smb multichannel query server interfaces interval in seconds */
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#define SMB_INTERFACE_POLL_INTERVAL 600
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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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#define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */
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#define CIFS_DFS_ROOT_SES(ses) ((ses)->dfs_root_ses ?: (ses))
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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 connection */
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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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CifsInNegotiate,
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};
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/* associated with each smb session */
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enum ses_status_enum {
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SES_NEW = 0,
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SES_GOOD,
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SES_EXITING,
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SES_NEED_RECON,
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SES_IN_SETUP
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};
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/* associated with each tree connection to the server */
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enum tid_status_enum {
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TID_NEW = 0,
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TID_GOOD,
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TID_EXITING,
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TID_NEED_RECON,
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TID_NEED_TCON,
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TID_IN_TCON,
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TID_NEED_FILES_INVALIDATE, /* currently unused */
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TID_IN_FILES_INVALIDATE
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};
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enum securityEnum {
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Unspecified = 0, /* not specified */
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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 hashing related structure/fields, not specific to a sec mech */
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struct cifs_secmech {
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struct shash_desc *hmacmd5; /* hmacmd5 hash function, for NTLMv2/CR1 hashes */
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struct shash_desc *md5; /* md5 hash function, for CIFS/SMB1 signatures */
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struct shash_desc *hmacsha256; /* hmac-sha256 hash function, for SMB2 signatures */
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struct shash_desc *sha512; /* sha512 hash function, for SMB3.1.1 preauth hash */
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struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */
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struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */
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struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */
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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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struct cifs_open_info_data {
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char *symlink_target;
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union {
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struct smb2_file_all_info fi;
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struct smb311_posix_qinfo posix_fi;
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};
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};
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static inline void cifs_free_open_info(struct cifs_open_info_data *data)
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{
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kfree(data->symlink_target);
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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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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 smb3_fs_context;
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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 cifs_credits;
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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 TCP_Server_Info *,
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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 *server,
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const struct cifs_credits *credits,
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const int optype);
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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)(struct mid_q_entry *, struct TCP_Server_Info *);
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void (*downgrade_oplock)(struct TCP_Server_Info *server,
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struct cifsInodeInfo *cinode, __u32 oplock,
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unsigned int epoch, bool *purge_cache);
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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 xid,
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struct cifs_ses *ses,
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struct TCP_Server_Info *server);
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/* set negotiated write size */
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unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
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/* set negotiated read size */
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unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
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/* setup smb sessionn */
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int (*sess_setup)(const unsigned int, struct cifs_ses *,
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struct TCP_Server_Info *server,
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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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struct cifs_sb_info *);
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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 xid, struct cifs_tcon *tcon,
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struct cifs_sb_info *cifs_sb, const char *full_path,
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struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse);
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/* query file data from the server */
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int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon,
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struct cifsFileInfo *cfile, struct cifs_open_info_data *data);
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/* query reparse tag from srv to determine which type of special file */
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int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon,
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struct cifs_sb_info *cifs_sb, const char *path,
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__u32 *reparse_tag);
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/* get server index number */
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int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon,
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struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid,
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struct cifs_open_info_data *data);
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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 xid, struct inode *inode, umode_t mode,
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struct cifs_tcon *tcon, const char *name,
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struct cifs_sb_info *sb);
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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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struct cifs_sb_info *, const char *,
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char **, bool);
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/* open a file for non-posix mounts */
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int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock,
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void *buf);
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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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/* close a file, returning file attributes and timestamps */
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void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
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struct cifsFileInfo *pfile_info);
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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);
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/* check for STATUS_PENDING and process the response if yes */
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bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
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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 cifs_sb_info *, 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 */
|
|
void (*new_lease_key)(struct cifs_fid *);
|
|
int (*generate_signingkey)(struct cifs_ses *ses,
|
|
struct TCP_Server_Info *server);
|
|
int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *,
|
|
bool allocate_crypto);
|
|
int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
|
|
struct cifsFileInfo *src_file);
|
|
int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
|
|
struct cifsFileInfo *src_file, void __user *);
|
|
int (*notify)(const unsigned int xid, struct file *pfile,
|
|
void __user *pbuf, bool return_changes);
|
|
int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
|
|
struct cifs_sb_info *, const unsigned char *,
|
|
char *, unsigned int *);
|
|
int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
|
|
struct cifs_sb_info *, const unsigned char *,
|
|
char *, unsigned int *);
|
|
/* if we can do cache read operations */
|
|
bool (*is_read_op)(__u32);
|
|
/* set oplock level for the inode */
|
|
void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
|
|
bool *);
|
|
/* create lease context buffer for CREATE request */
|
|
char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
|
|
/* parse lease context buffer and return oplock/epoch info */
|
|
__u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
|
|
ssize_t (*copychunk_range)(const unsigned int,
|
|
struct cifsFileInfo *src_file,
|
|
struct cifsFileInfo *target_file,
|
|
u64 src_off, u64 len, u64 dest_off);
|
|
int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
|
|
struct cifsFileInfo *target_file, u64 src_off, u64 len,
|
|
u64 dest_off);
|
|
int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
|
|
ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
|
|
const unsigned char *, const unsigned char *, char *,
|
|
size_t, struct cifs_sb_info *);
|
|
int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
|
|
const char *, const void *, const __u16,
|
|
const struct nls_table *, struct cifs_sb_info *);
|
|
struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
|
|
const char *, u32 *, u32);
|
|
struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
|
|
const struct cifs_fid *, u32 *, 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 *, struct cifs_credits *);
|
|
/* adjust previously taken mtu credits to request size */
|
|
int (*adjust_credits)(struct TCP_Server_Info *server,
|
|
struct cifs_credits *credits,
|
|
const unsigned int payload_size);
|
|
/* 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 *);
|
|
/* ioctl passthrough for query_info */
|
|
int (*ioctl_query_info)(const unsigned int xid,
|
|
struct cifs_tcon *tcon,
|
|
struct cifs_sb_info *cifs_sb,
|
|
__le16 *path, int is_dir,
|
|
unsigned long p);
|
|
/* make unix special files (block, char, fifo, socket) */
|
|
int (*make_node)(unsigned int xid,
|
|
struct inode *inode,
|
|
struct dentry *dentry,
|
|
struct cifs_tcon *tcon,
|
|
const char *full_path,
|
|
umode_t mode,
|
|
dev_t device_number);
|
|
/* version specific fiemap implementation */
|
|
int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
|
|
struct fiemap_extent_info *, u64, u64);
|
|
/* version specific llseek implementation */
|
|
loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
|
|
/* Check for STATUS_IO_TIMEOUT */
|
|
bool (*is_status_io_timeout)(char *buf);
|
|
/* Check for STATUS_NETWORK_NAME_DELETED */
|
|
void (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv);
|
|
};
|
|
|
|
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)
|
|
#define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size)
|
|
#define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server))
|
|
|
|
/**
|
|
* CIFS superblock mount flags (mnt_cifs_flags) to consider when
|
|
* trying to reuse existing superblock for a new mount
|
|
*/
|
|
#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 | \
|
|
CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
|
|
CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
|
|
CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
|
|
|
|
/**
|
|
* Generic VFS superblock mount flags (s_flags) to consider when
|
|
* trying to reuse existing superblock for a new mount
|
|
*/
|
|
#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 smb3_fs_context *ctx;
|
|
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;
|
|
spinlock_t srv_lock; /* protect anything here that is not protected */
|
|
__u64 conn_id; /* connection identifier (useful for debugging) */
|
|
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;
|
|
/* updates to tcpStatus protected by cifs_tcp_ses_lock */
|
|
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*/
|
|
spinlock_t mid_lock; /* protect mid queue and it's entries */
|
|
struct list_head pending_mid_q;
|
|
bool noblocksnd; /* use blocking sendmsg */
|
|
bool noautotune; /* do not autotune send buf sizes */
|
|
bool nosharesock;
|
|
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 */
|
|
unsigned int max_in_flight; /* max number of requests that were on wire */
|
|
spinlock_t req_lock; /* protect the two values above */
|
|
struct mutex _srv_mutex;
|
|
unsigned int nofs_flag;
|
|
struct task_struct *tsk;
|
|
char server_GUID[16];
|
|
__u16 sec_mode;
|
|
bool sign; /* is signing enabled on this connection? */
|
|
bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
|
|
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, protected by GlobalMid_Lock */
|
|
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 */
|
|
__u32 reconnect_instance; /* incremented on each reconnect */
|
|
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_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 */
|
|
struct delayed_work resolve; /* dns resolution 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 */
|
|
atomic_t in_send; /* requests trying to send */
|
|
atomic_t num_waiters; /* blocked waiting to get in sendrecv */
|
|
#ifdef CONFIG_CIFS_STATS2
|
|
atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
|
|
atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
|
|
__u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
|
|
__u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
|
|
__u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
|
|
#endif /* STATS2 */
|
|
unsigned int max_read;
|
|
unsigned int max_write;
|
|
unsigned int min_offload;
|
|
__le16 compress_algorithm;
|
|
__u16 signing_algorithm;
|
|
__le16 cipher_type;
|
|
/* save initital negprot hash */
|
|
__u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
|
|
bool signing_negotiated; /* true if valid signing context rcvd from server */
|
|
bool posix_ext_supported;
|
|
struct delayed_work reconnect; /* reconnect workqueue job */
|
|
struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
|
|
unsigned long echo_interval;
|
|
|
|
/*
|
|
* Number of targets available for reconnect. The more targets
|
|
* the more tasks have to wait to let the demultiplex thread
|
|
* reconnect.
|
|
*/
|
|
int nr_targets;
|
|
bool noblockcnt; /* use non-blocking connect() */
|
|
|
|
/*
|
|
* If this is a session channel,
|
|
* primary_server holds the ref-counted
|
|
* pointer to primary channel connection for the session.
|
|
*/
|
|
#define CIFS_SERVER_IS_CHAN(server) (!!(server)->primary_server)
|
|
struct TCP_Server_Info *primary_server;
|
|
|
|
#ifdef CONFIG_CIFS_SWN_UPCALL
|
|
bool use_swn_dstaddr;
|
|
struct sockaddr_storage swn_dstaddr;
|
|
#endif
|
|
struct mutex refpath_lock; /* protects leaf_fullpath */
|
|
/*
|
|
* Canonical DFS full paths that were used to chase referrals in mount and reconnect.
|
|
*
|
|
* origin_fullpath: first or original referral path
|
|
* leaf_fullpath: last referral path (might be changed due to nested links in reconnect)
|
|
*
|
|
* current_fullpath: pointer to either origin_fullpath or leaf_fullpath
|
|
* NOTE: cannot be accessed outside cifs_reconnect() and smb2_reconnect()
|
|
*
|
|
* format: \\HOST\SHARE\[OPTIONAL PATH]
|
|
*/
|
|
char *origin_fullpath, *leaf_fullpath, *current_fullpath;
|
|
};
|
|
|
|
static inline bool is_smb1(struct TCP_Server_Info *server)
|
|
{
|
|
return HEADER_PREAMBLE_SIZE(server) != 0;
|
|
}
|
|
|
|
static inline void cifs_server_lock(struct TCP_Server_Info *server)
|
|
{
|
|
unsigned int nofs_flag = memalloc_nofs_save();
|
|
|
|
mutex_lock(&server->_srv_mutex);
|
|
server->nofs_flag = nofs_flag;
|
|
}
|
|
|
|
static inline void cifs_server_unlock(struct TCP_Server_Info *server)
|
|
{
|
|
unsigned int nofs_flag = server->nofs_flag;
|
|
|
|
mutex_unlock(&server->_srv_mutex);
|
|
memalloc_nofs_restore(nofs_flag);
|
|
}
|
|
|
|
struct cifs_credits {
|
|
unsigned int value;
|
|
unsigned int instance;
|
|
};
|
|
|
|
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_credits)
|
|
{
|
|
int num;
|
|
|
|
spin_lock(&server->req_lock);
|
|
num = *credits;
|
|
spin_unlock(&server->req_lock);
|
|
return num >= num_credits;
|
|
}
|
|
|
|
static inline void
|
|
add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
|
|
const int optype)
|
|
{
|
|
server->ops->add_credits(server, credits, optype);
|
|
}
|
|
|
|
static inline void
|
|
add_credits_and_wake_if(struct TCP_Server_Info *server,
|
|
const struct cifs_credits *credits, const int optype)
|
|
{
|
|
if (credits->value) {
|
|
server->ops->add_credits(server, credits, 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 int
|
|
adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
|
|
const unsigned int payload_size)
|
|
{
|
|
return server->ops->adjust_credits ?
|
|
server->ops->adjust_credits(server, credits, payload_size) : 0;
|
|
}
|
|
|
|
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_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)
|
|
|
|
#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:
|
|
*
|
|
* https://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 {
|
|
struct list_head iface_head;
|
|
struct kref refcount;
|
|
size_t speed;
|
|
unsigned int rdma_capable : 1;
|
|
unsigned int rss_capable : 1;
|
|
unsigned int is_active : 1; /* unset if non existent */
|
|
struct sockaddr_storage sockaddr;
|
|
};
|
|
|
|
/* release iface when last ref is dropped */
|
|
static inline void
|
|
release_iface(struct kref *ref)
|
|
{
|
|
struct cifs_server_iface *iface = container_of(ref,
|
|
struct cifs_server_iface,
|
|
refcount);
|
|
list_del_init(&iface->iface_head);
|
|
kfree(iface);
|
|
}
|
|
|
|
/*
|
|
* compare two interfaces a and b
|
|
* return 0 if everything matches.
|
|
* return 1 if a has higher link speed, or rdma capable, or rss capable
|
|
* return -1 otherwise.
|
|
*/
|
|
static inline int
|
|
iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
|
|
{
|
|
int cmp_ret = 0;
|
|
|
|
WARN_ON(!a || !b);
|
|
if (a->speed == b->speed) {
|
|
if (a->rdma_capable == b->rdma_capable) {
|
|
if (a->rss_capable == b->rss_capable) {
|
|
cmp_ret = memcmp(&a->sockaddr, &b->sockaddr,
|
|
sizeof(a->sockaddr));
|
|
if (!cmp_ret)
|
|
return 0;
|
|
else if (cmp_ret > 0)
|
|
return 1;
|
|
else
|
|
return -1;
|
|
} else if (a->rss_capable > b->rss_capable)
|
|
return 1;
|
|
else
|
|
return -1;
|
|
} else if (a->rdma_capable > b->rdma_capable)
|
|
return 1;
|
|
else
|
|
return -1;
|
|
} else if (a->speed > b->speed)
|
|
return 1;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
struct cifs_chan {
|
|
unsigned int in_reconnect : 1; /* if session setup in progress for this channel */
|
|
struct TCP_Server_Info *server;
|
|
struct cifs_server_iface *iface; /* interface in use */
|
|
__u8 signkey[SMB3_SIGN_KEY_SIZE];
|
|
};
|
|
|
|
/*
|
|
* 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 rlist; /* reconnect list */
|
|
struct list_head tcon_list;
|
|
struct cifs_tcon *tcon_ipc;
|
|
spinlock_t ses_lock; /* protect anything here that is not protected */
|
|
struct mutex session_mutex;
|
|
struct TCP_Server_Info *server; /* pointer to server info */
|
|
int ses_count; /* reference counter */
|
|
enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */
|
|
unsigned int 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 ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */
|
|
char *user_name; /* must not be null except during init of sess
|
|
and after mount option parsing we fill it */
|
|
char *domainName;
|
|
char *password;
|
|
char workstation_name[CIFS_MAX_WORKSTATION_LEN];
|
|
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 domainAuto:1;
|
|
__u16 session_flags;
|
|
__u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
|
|
__u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
|
|
__u8 smb3decryptionkey[SMB3_ENC_DEC_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;
|
|
/* ========= begin: protected by iface_lock ======== */
|
|
struct list_head iface_list;
|
|
size_t iface_count;
|
|
unsigned long iface_last_update; /* jiffies */
|
|
/* ========= end: protected by iface_lock ======== */
|
|
|
|
spinlock_t chan_lock;
|
|
/* ========= begin: protected by chan_lock ======== */
|
|
#define CIFS_MAX_CHANNELS 16
|
|
#define CIFS_ALL_CHANNELS_SET(ses) \
|
|
((1UL << (ses)->chan_count) - 1)
|
|
#define CIFS_ALL_CHANS_GOOD(ses) \
|
|
(!(ses)->chans_need_reconnect)
|
|
#define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \
|
|
((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
|
|
#define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \
|
|
((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
|
|
#define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \
|
|
test_bit((index), &(ses)->chans_need_reconnect)
|
|
#define CIFS_CHAN_IN_RECONNECT(ses, index) \
|
|
((ses)->chans[(index)].in_reconnect)
|
|
|
|
struct cifs_chan chans[CIFS_MAX_CHANNELS];
|
|
size_t chan_count;
|
|
size_t chan_max;
|
|
atomic_t chan_seq; /* round robin state */
|
|
|
|
/*
|
|
* chans_need_reconnect is a bitmap indicating which of the channels
|
|
* under this smb session needs to be reconnected.
|
|
* If not multichannel session, only one bit will be used.
|
|
*
|
|
* We will ask for sess and tcon reconnection only if all the
|
|
* channels are marked for needing reconnection. This will
|
|
* enable the sessions on top to continue to live till any
|
|
* of the channels below are active.
|
|
*/
|
|
unsigned long chans_need_reconnect;
|
|
/* ========= end: protected by chan_lock ======== */
|
|
struct cifs_ses *dfs_root_ses;
|
|
};
|
|
|
|
static inline bool
|
|
cap_unix(struct cifs_ses *ses)
|
|
{
|
|
return ses->server->vals->cap_unix & ses->capabilities;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
u32 cf_cifstag;
|
|
char *cf_symlink_target;
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
spinlock_t tc_lock; /* protect anything here that is not protected */
|
|
atomic_t num_local_opens; /* num of all opens including disconnected */
|
|
atomic_t num_remote_opens; /* num of all network opens on server */
|
|
struct list_head openFileList;
|
|
spinlock_t open_file_lock; /* protects list above */
|
|
struct cifs_ses *ses; /* pointer to session associated with */
|
|
char tree_name[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 tid_status_enum status;
|
|
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 nodelete:1;
|
|
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 */
|
|
bool use_witness:1; /* use witness protocol */
|
|
__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 handle_timeout; /* persistent and durable handle timeout in ms */
|
|
__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_volume *fscache; /* cookie for share */
|
|
#endif
|
|
struct list_head pending_opens; /* list of incomplete opens */
|
|
struct cached_fids *cfids;
|
|
/* BB add field for back pointer to sb struct(s)? */
|
|
#ifdef CONFIG_CIFS_DFS_UPCALL
|
|
struct list_head ulist; /* cache update list */
|
|
#endif
|
|
struct delayed_work query_interfaces; /* query interfaces workqueue job */
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
};
|
|
|
|
struct cifs_deferred_close {
|
|
struct list_head dlist;
|
|
struct tcon_link *tlink;
|
|
__u16 netfid;
|
|
__u64 persistent_fid;
|
|
__u64 volatile_fid;
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
__u16 type;
|
|
__u16 flags;
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
};
|
|
|
|
#define ACL_NO_MODE ((umode_t)(-1))
|
|
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];
|
|
__u32 access;
|
|
struct cifs_pending_open *pending_open;
|
|
unsigned int epoch;
|
|
#ifdef CONFIG_CIFS_DEBUG2
|
|
__u64 mid;
|
|
#endif /* CIFS_DEBUG2 */
|
|
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 swapfile:1;
|
|
bool oplock_break_cancelled:1;
|
|
unsigned int oplock_epoch; /* epoch from the lease break */
|
|
__u32 oplock_level; /* oplock/lease level from the lease break */
|
|
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 work_struct put; /* work for the final part of _put */
|
|
struct delayed_work deferred;
|
|
bool deferred_close_scheduled; /* Flag to indicate close is scheduled */
|
|
char *symlink_target;
|
|
};
|
|
|
|
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 TCP_Server_Info *server;
|
|
};
|
|
|
|
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;
|
|
/*
|
|
* Indicates if this aio_ctx is for direct_io,
|
|
* If yes, iter is a copy of the user passed iov_iter
|
|
*/
|
|
bool direct_io;
|
|
};
|
|
|
|
/* 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];
|
|
struct TCP_Server_Info *server;
|
|
#ifdef CONFIG_CIFS_SMB_DIRECT
|
|
struct smbd_mr *mr;
|
|
#endif
|
|
unsigned int pagesz;
|
|
unsigned int page_offset;
|
|
unsigned int tailsz;
|
|
struct cifs_credits credits;
|
|
unsigned int nr_pages;
|
|
struct page **pages;
|
|
};
|
|
|
|
/* 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;
|
|
struct TCP_Server_Info *server;
|
|
#ifdef CONFIG_CIFS_SMB_DIRECT
|
|
struct smbd_mr *mr;
|
|
#endif
|
|
unsigned int pagesz;
|
|
unsigned int page_offset;
|
|
unsigned int tailsz;
|
|
struct cifs_credits 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,
|
|
bool offload);
|
|
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) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE))
|
|
#define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
|
|
#define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE))
|
|
|
|
/*
|
|
* One of these for each file inode
|
|
*/
|
|
|
|
struct cifsInodeInfo {
|
|
struct netfs_inode netfs; /* Netfslib context and vfs inode */
|
|
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 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_FLAG_UNUSED (2) /* Unused flag */
|
|
#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 */
|
|
#define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */
|
|
#define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */
|
|
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 */
|
|
struct list_head deferred_closes; /* list of deferred closes */
|
|
spinlock_t deferred_lock; /* protection on deferred list */
|
|
bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */
|
|
char *symlink_target;
|
|
};
|
|
|
|
static inline struct cifsInodeInfo *
|
|
CIFS_I(struct inode *inode)
|
|
{
|
|
return container_of(inode, struct cifsInodeInfo, netfs.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 */
|
|
__u16 credits_received; /* number of credits from the response */
|
|
__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 */
|
|
struct task_struct *creator;
|
|
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 */
|
|
unsigned int optype; /* operation type */
|
|
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;
|
|
__u64 mid;
|
|
__u16 cmd;
|
|
};
|
|
|
|
/* Make code in transport.c a little cleaner by moving
|
|
update of optional stats into function below */
|
|
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);
|
|
}
|
|
|
|
#ifdef CONFIG_CIFS_STATS2
|
|
static inline void cifs_save_when_sent(struct mid_q_entry *mid)
|
|
{
|
|
mid->when_sent = jiffies;
|
|
}
|
|
#else
|
|
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;
|
|
int ttl;
|
|
};
|
|
|
|
struct file_list {
|
|
struct list_head list;
|
|
struct cifsFileInfo *cfile;
|
|
};
|
|
|
|
struct cifs_mount_ctx {
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct smb3_fs_context *fs_ctx;
|
|
unsigned int xid;
|
|
struct TCP_Server_Info *server;
|
|
struct cifs_ses *ses;
|
|
struct cifs_tcon *tcon;
|
|
struct cifs_ses *root_ses;
|
|
uuid_t mount_id;
|
|
char *origin_fullpath, *leaf_fullpath;
|
|
};
|
|
|
|
static inline void free_dfs_info_param(struct dfs_info3_param *param)
|
|
{
|
|
if (param) {
|
|
kfree(param->path_name);
|
|
kfree(param->node_name);
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
/* cifs_get_writable_file() flags */
|
|
#define FIND_WR_ANY 0
|
|
#define FIND_WR_FSUID_ONLY 1
|
|
#define FIND_WR_WITH_DELETE 2
|
|
|
|
#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_NON_BLOCKING 2 /* do not block waiting for credits */
|
|
#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_RSP_BUF 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_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */
|
|
/* Lower bitmask values are reserved by others below. */
|
|
#define CIFS_SESS_OP 0x2000 /* session setup request */
|
|
#define CIFS_OP_MASK 0x2780 /* mask request type */
|
|
|
|
#define CIFS_HAS_CREDITS 0x0400 /* already has credits */
|
|
#define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
|
|
#define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */
|
|
|
|
/* Security Flags: indicate type of session setup needed */
|
|
#define CIFSSEC_MAY_SIGN 0x00001
|
|
#define CIFSSEC_MAY_NTLMV2 0x00004
|
|
#define CIFSSEC_MAY_KRB5 0x00008
|
|
#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_NTLMV2 0x04004
|
|
#define CIFSSEC_MUST_KRB5 0x08008
|
|
#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 */
|
|
#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_NTLMV2)
|
|
#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | 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.
|
|
*/
|
|
|
|
/****************************************************************************
|
|
* Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according
|
|
* to the locking order. i.e. if two locks are to be held together, the lock that
|
|
* appears higher in this list needs to be taken before the other.
|
|
*
|
|
* If you hold a lock that is lower in this list, and you need to take a higher lock
|
|
* (or if you think that one of the functions that you're calling may need to), first
|
|
* drop the lock you hold, pick up the higher lock, then the lower one. This will
|
|
* ensure that locks are picked up only in one direction in the below table
|
|
* (top to bottom).
|
|
*
|
|
* Also, if you expect a function to be called with a lock held, explicitly document
|
|
* this in the comments on top of your function definition.
|
|
*
|
|
* And also, try to keep the critical sections (lock hold time) to be as minimal as
|
|
* possible. Blocking / calling other functions with a lock held always increase
|
|
* the risk of a possible deadlock.
|
|
*
|
|
* Following this rule will avoid unnecessary deadlocks, which can get really hard to
|
|
* debug. Also, any new lock that you introduce, please add to this list in the correct
|
|
* order.
|
|
*
|
|
* Please populate this list whenever you introduce new locks in your changes. Or in
|
|
* case I've missed some existing locks. Please ensure that it's added in the list
|
|
* based on the locking order expected.
|
|
*
|
|
* =====================================================================================
|
|
* Lock Protects Initialization fn
|
|
* =====================================================================================
|
|
* vol_list_lock
|
|
* vol_info->ctx_lock vol_info->ctx
|
|
* cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb
|
|
* TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session
|
|
* reconnect_mutex
|
|
* TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session
|
|
* cifs_ses->session_mutex cifs_ses sesInfoAlloc
|
|
* cifs_tcon
|
|
* cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc
|
|
* cifs_tcon->pending_opens
|
|
* cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc
|
|
* cifs_tcon->bytes_written
|
|
* cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc
|
|
* GlobalMid_Lock GlobalMaxActiveXid init_cifs
|
|
* GlobalCurrentXid
|
|
* GlobalTotalActiveXid
|
|
* TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change)
|
|
* TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session
|
|
* ->CurrentMid
|
|
* (any changes in mid_q_entry fields)
|
|
* TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session
|
|
* ->credits
|
|
* ->echo_credits
|
|
* ->oplock_credits
|
|
* ->reconnect_instance
|
|
* cifs_ses->ses_lock (anything that is not protected by another lock and can change)
|
|
* cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc
|
|
* ->iface_count
|
|
* ->iface_last_update
|
|
* cifs_ses->chan_lock cifs_ses->chans
|
|
* ->chans_need_reconnect
|
|
* ->chans_in_reconnect
|
|
* cifs_tcon->tc_lock (anything that is not protected by another lock and can change)
|
|
* cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode
|
|
* cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc
|
|
* cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once
|
|
* ->can_cache_brlcks
|
|
* cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc
|
|
* cached_fid->fid_mutex cifs_tcon->crfid tconInfoAlloc
|
|
* cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo
|
|
* cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo
|
|
* ->invalidHandle initiate_cifs_search
|
|
* ->oplock_break_cancelled
|
|
* cifs_aio_ctx->aio_mutex cifs_aio_ctx cifs_aio_ctx_alloc
|
|
****************************************************************************/
|
|
|
|
#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
|
|
*/
|
|
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.
|
|
* 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
|
|
*/
|
|
extern spinlock_t cifs_tcp_ses_lock;
|
|
|
|
/*
|
|
* Global transaction id (XID) information
|
|
*/
|
|
extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
|
|
extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
|
|
extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
|
|
extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */
|
|
|
|
/*
|
|
* Global counters, updated atomically
|
|
*/
|
|
extern atomic_t sesInfoAllocCount;
|
|
extern atomic_t tconInfoAllocCount;
|
|
extern atomic_t tcpSesNextId;
|
|
extern atomic_t tcpSesAllocCount;
|
|
extern atomic_t tcpSesReconnectCount;
|
|
extern atomic_t tconInfoReconnectCount;
|
|
|
|
/* Various Debug counters */
|
|
extern atomic_t buf_alloc_count; /* current number allocated */
|
|
extern atomic_t small_buf_alloc_count;
|
|
#ifdef CONFIG_CIFS_STATS2
|
|
extern atomic_t total_buf_alloc_count; /* total allocated over all time */
|
|
extern atomic_t total_small_buf_alloc_count;
|
|
extern unsigned int slow_rsp_threshold; /* number of secs before logging */
|
|
#endif
|
|
|
|
/* 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 enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
|
|
extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
|
|
extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */
|
|
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 */
|
|
extern atomic_t mid_count;
|
|
|
|
void cifs_oplock_break(struct work_struct *work);
|
|
void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
|
|
void smb2_deferred_work_close(struct work_struct *work);
|
|
|
|
extern const struct slow_work_ops cifs_oplock_break_ops;
|
|
extern struct workqueue_struct *cifsiod_wq;
|
|
extern struct workqueue_struct *decrypt_wq;
|
|
extern struct workqueue_struct *fileinfo_put_wq;
|
|
extern struct workqueue_struct *cifsoplockd_wq;
|
|
extern struct workqueue_struct *deferredclose_wq;
|
|
extern __u32 cifs_lock_secret;
|
|
|
|
extern mempool_t *cifs_mid_poolp;
|
|
|
|
/* Operations for different SMB versions */
|
|
#define SMB1_VERSION_STRING "1.0"
|
|
#define SMB20_VERSION_STRING "2.0"
|
|
#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
|
|
extern struct smb_version_operations smb1_operations;
|
|
extern struct smb_version_values smb1_values;
|
|
extern struct smb_version_operations smb20_operations;
|
|
extern struct smb_version_values smb20_values;
|
|
#endif /* CIFS_ALLOW_INSECURE_LEGACY */
|
|
#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"
|
|
#define ALT_SMB302_VERSION_STRING "3.0.2"
|
|
/*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;
|
|
|
|
static inline char *get_security_type_str(enum securityEnum sectype)
|
|
{
|
|
switch (sectype) {
|
|
case RawNTLMSSP:
|
|
return "RawNTLMSSP";
|
|
case Kerberos:
|
|
return "Kerberos";
|
|
case NTLMv2:
|
|
return "NTLMv2";
|
|
default:
|
|
return "Unknown";
|
|
}
|
|
}
|
|
|
|
static inline bool is_smb1_server(struct TCP_Server_Info *server)
|
|
{
|
|
return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
|
|
}
|
|
|
|
static inline bool is_tcon_dfs(struct cifs_tcon *tcon)
|
|
{
|
|
/*
|
|
* For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS
|
|
* Subsystem Notifies That a Share Is a DFS Share.
|
|
*
|
|
* For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server
|
|
* Application Updates a Share.
|
|
*/
|
|
if (!tcon || !tcon->ses || !tcon->ses->server)
|
|
return false;
|
|
return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :
|
|
tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);
|
|
}
|
|
|
|
static inline bool cifs_is_referral_server(struct cifs_tcon *tcon,
|
|
const struct dfs_info3_param *ref)
|
|
{
|
|
/*
|
|
* Check if all targets are capable of handling DFS referrals as per
|
|
* MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.
|
|
*/
|
|
return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));
|
|
}
|
|
|
|
static inline u64 cifs_flock_len(const struct file_lock *fl)
|
|
{
|
|
return (u64)fl->fl_end - fl->fl_start + 1;
|
|
}
|
|
|
|
static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses)
|
|
{
|
|
if (WARN_ON_ONCE(!ses || !ses->server))
|
|
return 0;
|
|
/*
|
|
* Make workstation name no more than 15 chars when using insecure dialects as some legacy
|
|
* servers do require it during NTLMSSP.
|
|
*/
|
|
if (ses->server->dialect <= SMB20_PROT_ID)
|
|
return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL);
|
|
return sizeof(ses->workstation_name);
|
|
}
|
|
|
|
static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src)
|
|
{
|
|
memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src));
|
|
dst->AccessFlags = src->AccessFlags;
|
|
dst->CurrentByteOffset = src->CurrentByteOffset;
|
|
dst->Mode = src->Mode;
|
|
dst->AlignmentRequirement = src->AlignmentRequirement;
|
|
dst->FileNameLength = src->FileNameLength;
|
|
}
|
|
|
|
static inline unsigned int cifs_get_num_sgs(const struct smb_rqst *rqst,
|
|
int num_rqst,
|
|
const u8 *sig)
|
|
{
|
|
unsigned int len, skip;
|
|
unsigned int nents = 0;
|
|
unsigned long addr;
|
|
int i, j;
|
|
|
|
/* Assumes the first rqst has a transform header as the first iov.
|
|
* I.e.
|
|
* rqst[0].rq_iov[0] is transform header
|
|
* rqst[0].rq_iov[1+] data to be encrypted/decrypted
|
|
* rqst[1+].rq_iov[0+] data to be encrypted/decrypted
|
|
*/
|
|
for (i = 0; i < num_rqst; i++) {
|
|
/*
|
|
* The first rqst has a transform header where the
|
|
* first 20 bytes are not part of the encrypted blob.
|
|
*/
|
|
for (j = 0; j < rqst[i].rq_nvec; j++) {
|
|
struct kvec *iov = &rqst[i].rq_iov[j];
|
|
|
|
skip = (i == 0) && (j == 0) ? 20 : 0;
|
|
addr = (unsigned long)iov->iov_base + skip;
|
|
if (unlikely(is_vmalloc_addr((void *)addr))) {
|
|
len = iov->iov_len - skip;
|
|
nents += DIV_ROUND_UP(offset_in_page(addr) + len,
|
|
PAGE_SIZE);
|
|
} else {
|
|
nents++;
|
|
}
|
|
}
|
|
nents += rqst[i].rq_npages;
|
|
}
|
|
nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE);
|
|
return nents;
|
|
}
|
|
|
|
/* We can not use the normal sg_set_buf() as we will sometimes pass a
|
|
* stack object as buf.
|
|
*/
|
|
static inline struct scatterlist *cifs_sg_set_buf(struct scatterlist *sg,
|
|
const void *buf,
|
|
unsigned int buflen)
|
|
{
|
|
unsigned long addr = (unsigned long)buf;
|
|
unsigned int off = offset_in_page(addr);
|
|
|
|
addr &= PAGE_MASK;
|
|
if (unlikely(is_vmalloc_addr((void *)addr))) {
|
|
do {
|
|
unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off);
|
|
|
|
sg_set_page(sg++, vmalloc_to_page((void *)addr), len, off);
|
|
|
|
off = 0;
|
|
addr += PAGE_SIZE;
|
|
buflen -= len;
|
|
} while (buflen);
|
|
} else {
|
|
sg_set_page(sg++, virt_to_page(addr), buflen, off);
|
|
}
|
|
return sg;
|
|
}
|
|
|
|
#endif /* _CIFS_GLOB_H */
|