#include <linux/workqueue.h>
#include "cifs_fs_sb.h"
#include "cifsacl.h"
+#include <crypto/internal/hash.h>
+#include <linux/scatterlist.h>
+
/*
* The sizes of various internal tables and strings
*/
#define CIFS_MIN_RCV_POOL 4
+/*
+ * default attribute cache timeout (jiffies)
+ */
+#define CIFS_DEF_ACTIMEO (1 * HZ)
+
+/*
+ * max attribute cache timeout (jiffies) - 2^30
+ */
+#define CIFS_MAX_ACTIMEO (1 << 30)
+
/*
* MAX_REQ is the maximum number of requests that WE will send
* on one socket concurrently. It also matches the most common
* CIFS vfs client Status information (based on what we know.)
*/
- /* associated with each tcp and smb session */
+/* associated with each tcp and smb session */
enum statusEnum {
CifsNew = 0,
CifsGood,
/* Netbios frames protocol not supported at this time */
};
-struct mac_key {
+struct session_key {
unsigned int len;
- union {
- char ntlm[CIFS_SESS_KEY_SIZE + 16];
- char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
- struct {
- char key[16];
- struct ntlmv2_resp resp;
- } ntlmv2;
- } data;
+ char *response;
+};
+
+/* crypto security descriptor definition */
+struct sdesc {
+ struct shash_desc shash;
+ char ctx[];
+};
+
+/* crypto hashing related structure/fields, not specific to a sec mech */
+struct cifs_secmech {
+ struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
+ struct crypto_shash *md5; /* md5 hash function */
+ struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
+ struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
+};
+
+/* per smb session structure/fields */
+struct ntlmssp_auth {
+ __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
+ __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
+ unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
+ char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
};
struct cifs_cred {
int srv_count; /* reference counter */
/* 15 character server name + 0x20 16th byte indicating type = srv */
char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
+ enum statusEnum tcpStatus; /* what we think the status is */
char *hostname; /* hostname portion of UNC string */
struct socket *ssocket;
- union {
- struct sockaddr_in sockAddr;
- struct sockaddr_in6 sockAddr6;
- } addr;
+ struct sockaddr_storage dstaddr;
+ struct sockaddr_storage srcaddr; /* locally bind to this IP */
+#ifdef CONFIG_NET_NS
+ struct net *net;
+#endif
wait_queue_head_t response_q;
wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
struct list_head pending_mid_q;
- void *Server_NlsInfo; /* BB - placeholder for future NLS info */
- unsigned short server_codepage; /* codepage for the server */
- enum protocolEnum protocolType;
- char versionMajor;
- char versionMinor;
- bool svlocal:1; /* local server or remote */
bool noblocksnd; /* use blocking sendmsg */
bool noautotune; /* do not autotune send buf sizes */
bool tcp_nodelay;
atomic_t inFlight; /* number of requests on the wire to server */
-#ifdef CONFIG_CIFS_STATS2
- atomic_t inSend; /* requests trying to send */
- atomic_t num_waiters; /* blocked waiting to get in sendrecv */
-#endif
- enum statusEnum tcpStatus; /* what we think the status is */
struct mutex srv_mutex;
struct task_struct *tsk;
char server_GUID[16];
char secMode;
+ bool session_estab; /* mark when very first sess is established */
+ u16 dialect; /* dialect index that server chose */
enum securityEnum secType;
unsigned int maxReq; /* Clients should submit no more */
/* than maxReq distinct unanswered SMBs to the server when using */
/* multiplexed reads or writes */
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 max_vcs; /* maximum number of smb sessions, at least
those that can be specified uniquely with
vcnumbers */
- char sessid[4]; /* unique token id for this session */
- /* (returned on Negotiate */
int capabilities; /* allow selective disabling of caps by smb sess */
int timeAdj; /* Adjust for difference in server time zone in sec */
__u16 CurrentMid; /* multiplex id - rotating counter */
- char cryptKey[CIFS_CRYPTO_KEY_SIZE];
+ 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; /* needed for CIFS PDU signature */
- struct mac_key mac_signing_key;
- char ntlmv2_hash[16];
+ __u32 sequence_number; /* for signing, protected by srv_mutex */
+ struct session_key session_key;
unsigned long lstrp; /* when we got last response from this server */
- u16 dialect; /* dialect index that server chose */
+ struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
/* 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 sec_kerberosu2u; /* supports U2U Kerberos */
- bool sec_ntlmssp; /* supports NTLMSSP */
+ struct delayed_work echo; /* echo ping workqueue job */
#ifdef CONFIG_CIFS_FSCACHE
struct fscache_cookie *fscache; /* client index cache cookie */
#endif
+#ifdef CONFIG_CIFS_STATS2
+ atomic_t inSend; /* requests trying to send */
+ atomic_t num_waiters; /* blocked waiting to get in sendrecv */
+#endif
};
+/*
+ * 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
+
/*
* Session structure. One of these for each uid session with a particular host
*/
char userName[MAX_USERNAME_SIZE + 1];
char *domainName;
char *password;
+ struct session_key auth_key;
+ struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
bool need_reconnect:1; /* connection reset, uid now invalid */
};
/* no more than one of the following three session flags may be set */
/* BB add field for back pointer to sb struct(s)? */
};
+/*
+ * This is a refcounted and timestamped container for a tcon pointer. The
+ * container holds a tcon reference. It is considered safe to free one of
+ * these when the tl_count goes to 0. The tl_time is the time of the last
+ * "get" on the container.
+ */
+struct tcon_link {
+ struct rb_node tl_rbnode;
+ uid_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 cifsTconInfo *tl_tcon;
+};
+
+extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
+
+static inline struct cifsTconInfo *
+tlink_tcon(struct tcon_link *tlink)
+{
+ return tlink->tl_tcon;
+}
+
+extern void cifs_put_tlink(struct tcon_link *tlink);
+
+static inline struct tcon_link *
+cifs_get_tlink(struct tcon_link *tlink)
+{
+ if (tlink && !IS_ERR(tlink))
+ atomic_inc(&tlink->tl_count);
+ return tlink;
+}
+
+/* This function is always expected to succeed */
+extern struct cifsTconInfo *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
+
/*
* This info hangs off the cifsFileInfo structure, pointed to by llist.
* This is used to track byte stream locks on the file
__u16 netfid; /* file id from remote */
/* BB add lock scope info here if needed */ ;
/* lock scope id (0 if none) */
- struct file *pfile; /* needed for writepage */
- struct inode *pInode; /* needed for oplock break */
- struct vfsmount *mnt;
+ struct dentry *dentry;
+ unsigned int f_flags;
+ struct tcon_link *tlink;
struct mutex lock_mutex;
struct list_head llist; /* list of byte range locks we have. */
- bool closePend:1; /* file is marked to close */
bool invalidHandle:1; /* file closed via session abend */
bool oplock_break_cancelled:1;
- atomic_t count; /* reference count */
+ int count; /* refcount protected by cifs_file_list_lock */
struct mutex fh_mutex; /* prevents reopen race after dead ses*/
struct cifs_search_info srch_inf;
struct work_struct oplock_break; /* work for oplock breaks */
};
-/* Take a reference on the file private data */
+/*
+ * Take a reference on the file private data. Must be called with
+ * cifs_file_list_lock held.
+ */
static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
{
- atomic_inc(&cifs_file->count);
+ ++cifs_file->count;
}
-/* Release a reference on the file private data */
-static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
-{
- if (atomic_dec_and_test(&cifs_file->count)) {
- iput(cifs_file->pInode);
- kfree(cifs_file);
- }
-}
+void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
/*
* One of these for each file inode
struct list_head lockList;
/* BB add in lists for dirty pages i.e. write caching info for oplock */
struct list_head openFileList;
- int write_behind_rc;
__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
- unsigned long time; /* jiffies of last update/check of inode */
- bool clientCanCacheRead:1; /* read oplock */
- bool clientCanCacheAll:1; /* read and writebehind oplock */
- bool delete_pending:1; /* DELETE_ON_CLOSE is set */
- bool invalid_mapping:1; /* pagecache is invalid */
+ bool clientCanCacheRead; /* read oplock */
+ bool clientCanCacheAll; /* read and writebehind oplock */
+ bool delete_pending; /* DELETE_ON_CLOSE is set */
+ bool invalid_mapping; /* pagecache is invalid */
+ unsigned long time; /* jiffies of last update of inode */
u64 server_eof; /* current file size on server */
u64 uniqueid; /* server inode number */
+ u64 createtime; /* creation time on server */
#ifdef CONFIG_CIFS_FSCACHE
struct fscache_cookie *fscache;
#endif
#endif
+struct mid_q_entry;
+
+/*
+ * This is the prototype for the mid callback function. When creating one,
+ * take special care to avoid deadlocks. Things to bear in mind:
+ *
+ * - it will be called by cifsd
+ * - the GlobalMid_Lock will be held
+ * - the mid will be removed from the pending_mid_q list
+ */
+typedef void (mid_callback_t)(struct mid_q_entry *mid);
+
/* one of these for every pending CIFS request to the server */
struct mid_q_entry {
struct list_head qhead; /* mids waiting on reply from this server */
unsigned long when_sent; /* time when smb send finished */
unsigned long when_received; /* when demux complete (taken off wire) */
#endif
- struct task_struct *tsk; /* task waiting for response */
+ mid_callback_t *callback; /* call completion callback */
+ void *callback_data; /* general purpose pointer for callback */
struct smb_hdr *resp_buf; /* response buffer */
int midState; /* wish this were enum but can not pass to wait_event */
__u8 command; /* smb command code */
/* 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 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 {
u64 cf_uniqueid;
u64 cf_eof;
u64 cf_bytes;
+ u64 cf_createtime;
uid_t cf_uid;
gid_t cf_gid;
umode_t cf_mode;
#define MID_REQUEST_SUBMITTED 2
#define MID_RESPONSE_RECEIVED 4
#define MID_RETRY_NEEDED 8 /* session closed while this request out */
-#define MID_NO_RESP_NEEDED 0x10
+#define MID_RESPONSE_MALFORMED 0x10
/* Types of response buffer returned from SendReceive2 */
#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
#define CIFS_IOVEC 4 /* array of response buffers */
/* Type of Request to SendReceive2 */
-#define CIFS_STD_OP 0 /* normal request timeout */
-#define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
-#define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
-#define CIFS_BLOCKING_OP 4 /* operation can block */
-#define CIFS_ASYNC_OP 8 /* do not wait for response */
-#define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
+#define CIFS_BLOCKING_OP 1 /* operation can block */
+#define CIFS_ASYNC_OP 2 /* do not wait for response */
+#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
#define CIFS_NO_RESP 0x040 /* no response buffer required */
* GlobalMid_Lock protects:
* list operations on pending_mid_q and oplockQ
* updates to XID counters, multiplex id and SMB sequence numbers
- * GlobalSMBSesLock protects:
+ * cifs_file_list_lock protects:
* list operations on tcp and SMB session lists and tCon lists
* f_owner.lock protects certain per file struct operations
* mapping->page_lock protects certain per page operations
* the reference counters for the server, smb session, and tcon. Finally,
* changes to the tcon->tidStatus should be done while holding this lock.
*/
-GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock;
+GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
/*
* This lock protects the cifs_file->llist and cifs_file->flist
* If cifs_tcp_ses_lock and the lock below are both needed to be held, then
* the cifs_tcp_ses_lock must be grabbed first and released last.
*/
-GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
+GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
/* Outstanding dir notify requests */
GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
/* on midQ entries */
-GLOBAL_EXTERN char Local_System_Name[15];
-
/*
* Global counters, updated atomically
*/
GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
+/* reconnect after this many failed echo attempts */
+GLOBAL_EXTERN unsigned short echo_retries;
+
void cifs_oplock_break(struct work_struct *work);
void cifs_oplock_break_get(struct cifsFileInfo *cfile);
void cifs_oplock_break_put(struct cifsFileInfo *cfile);
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