diff options
| -rw-r--r-- | fs/cifs/Makefile | 2 | ||||
| -rw-r--r-- | fs/cifs/cifsglob.h | 5 | ||||
| -rw-r--r-- | fs/cifs/cifsproto.h | 1 | ||||
| -rw-r--r-- | fs/cifs/smb1ops.c | 1 | ||||
| -rw-r--r-- | fs/cifs/smb2ops.c | 17 | ||||
| -rw-r--r-- | fs/cifs/smb2pdu.h | 59 | ||||
| -rw-r--r-- | fs/cifs/smb2proto.h | 5 | ||||
| -rw-r--r-- | fs/cifs/smb2transport.c | 151 | ||||
| -rw-r--r-- | fs/cifs/transport.c | 13 |
9 files changed, 246 insertions, 8 deletions
diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile index 4a7727143721..a73d7f888846 100644 --- a/fs/cifs/Makefile +++ b/fs/cifs/Makefile @@ -16,4 +16,4 @@ cifs-$(CONFIG_CIFS_DFS_UPCALL) += dns_resolve.o cifs_dfs_ref.o cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cache.o -cifs-$(CONFIG_CIFS_SMB2) += smb2ops.o smb2maperror.o +cifs-$(CONFIG_CIFS_SMB2) += smb2ops.o smb2maperror.o smb2transport.o diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 6d18962c9903..3575f0f832b1 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -22,6 +22,7 @@ #include <linux/in.h> #include <linux/in6.h> #include <linux/slab.h> +#include <linux/mempool.h> #include <linux/workqueue.h> #include "cifs_fs_sb.h" #include "cifsacl.h" @@ -218,6 +219,7 @@ struct smb_version_values { size_t header_size; size_t max_header_size; size_t read_rsp_size; + __le16 lock_cmd; }; #define HEADER_SIZE(server) (server->vals->header_size) @@ -812,6 +814,7 @@ 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 */ + struct TCP_Server_Info *server; /* server corresponding to this mid */ __u64 mid; /* multiplex id */ __u32 pid; /* process id */ __u32 sequence_number; /* for CIFS signing */ @@ -1153,6 +1156,8 @@ void cifs_oplock_break(struct work_struct *work); extern const struct slow_work_ops cifs_oplock_break_ops; extern struct workqueue_struct *cifsiod_wq; +extern mempool_t *cifs_mid_poolp; + /* Operations for different SMB versions */ #define SMB1_VERSION_STRING "1.0" extern struct smb_version_operations smb1_operations; diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 8797e4064662..88967d0885bf 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -68,6 +68,7 @@ extern char *cifs_compose_mount_options(const char *sb_mountdata, extern struct mid_q_entry *AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server); extern void DeleteMidQEntry(struct mid_q_entry *midEntry); +extern void cifs_wake_up_task(struct mid_q_entry *mid); extern int cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov, unsigned int nvec, mid_receive_t *receive, mid_callback_t *callback, void *cbdata, diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c index 728595f096c9..8f873863142a 100644 --- a/fs/cifs/smb1ops.c +++ b/fs/cifs/smb1ops.c @@ -445,4 +445,5 @@ struct smb_version_values smb1_values = { .header_size = sizeof(struct smb_hdr), .max_header_size = MAX_CIFS_HDR_SIZE, .read_rsp_size = sizeof(READ_RSP), + .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX), }; diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index f065e89756a1..09530f416123 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -18,10 +18,27 @@ */ #include "cifsglob.h" +#include "smb2pdu.h" +#include "smb2proto.h" + +static __u64 +smb2_get_next_mid(struct TCP_Server_Info *server) +{ + __u64 mid; + /* for SMB2 we need the current value */ + spin_lock(&GlobalMid_Lock); + mid = server->CurrentMid++; + spin_unlock(&GlobalMid_Lock); + return mid; +} struct smb_version_operations smb21_operations = { + .setup_request = smb2_setup_request, + .check_receive = smb2_check_receive, + .get_next_mid = smb2_get_next_mid, }; struct smb_version_values smb21_values = { .version_string = SMB21_VERSION_STRING, + .lock_cmd = SMB2_LOCK, }; diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index d35ac689f24b..c7f52e363d37 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -27,6 +27,65 @@ #include <net/sock.h> /* + * Note that, due to trying to use names similar to the protocol specifications, + * there are many mixed case field names in the structures below. Although + * this does not match typical Linux kernel style, it is necessary to be + * be able to match against the protocol specfication. + * + * SMB2 commands + * Some commands have minimal (wct=0,bcc=0), or uninteresting, responses + * (ie no useful data other than the SMB error code itself) and are marked such. + * Knowing this helps avoid response buffer allocations and copy in some cases. + */ + +/* List of commands in host endian */ +#define SMB2_NEGOTIATE_HE 0x0000 +#define SMB2_SESSION_SETUP_HE 0x0001 +#define SMB2_LOGOFF_HE 0x0002 /* trivial request/resp */ +#define SMB2_TREE_CONNECT_HE 0x0003 +#define SMB2_TREE_DISCONNECT_HE 0x0004 /* trivial req/resp */ +#define SMB2_CREATE_HE 0x0005 +#define SMB2_CLOSE_HE 0x0006 +#define SMB2_FLUSH_HE 0x0007 /* trivial resp */ +#define SMB2_READ_HE 0x0008 +#define SMB2_WRITE_HE 0x0009 +#define SMB2_LOCK_HE 0x000A +#define SMB2_IOCTL_HE 0x000B +#define SMB2_CANCEL_HE 0x000C +#define SMB2_ECHO_HE 0x000D +#define SMB2_QUERY_DIRECTORY_HE 0x000E +#define SMB2_CHANGE_NOTIFY_HE 0x000F +#define SMB2_QUERY_INFO_HE 0x0010 +#define SMB2_SET_INFO_HE 0x0011 +#define SMB2_OPLOCK_BREAK_HE 0x0012 + +/* The same list in little endian */ +#define SMB2_NEGOTIATE cpu_to_le16(SMB2_NEGOTIATE_HE) +#define SMB2_SESSION_SETUP cpu_to_le16(SMB2_SESSION_SETUP_HE) +#define SMB2_LOGOFF cpu_to_le16(SMB2_LOGOFF_HE) +#define SMB2_TREE_CONNECT cpu_to_le16(SMB2_TREE_CONNECT_HE) +#define SMB2_TREE_DISCONNECT cpu_to_le16(SMB2_TREE_DISCONNECT_HE) +#define SMB2_CREATE cpu_to_le16(SMB2_CREATE_HE) +#define SMB2_CLOSE cpu_to_le16(SMB2_CLOSE_HE) +#define SMB2_FLUSH cpu_to_le16(SMB2_FLUSH_HE) +#define SMB2_READ cpu_to_le16(SMB2_READ_HE) +#define SMB2_WRITE cpu_to_le16(SMB2_WRITE_HE) +#define SMB2_LOCK cpu_to_le16(SMB2_LOCK_HE) +#define SMB2_IOCTL cpu_to_le16(SMB2_IOCTL_HE) +#define SMB2_CANCEL cpu_to_le16(SMB2_CANCEL_HE) +#define SMB2_ECHO cpu_to_le16(SMB2_ECHO_HE) +#define SMB2_QUERY_DIRECTORY cpu_to_le16(SMB2_QUERY_DIRECTORY_HE) +#define SMB2_CHANGE_NOTIFY cpu_to_le16(SMB2_CHANGE_NOTIFY_HE) +#define SMB2_QUERY_INFO cpu_to_le16(SMB2_QUERY_INFO_HE) +#define SMB2_SET_INFO cpu_to_le16(SMB2_SET_INFO_HE) +#define SMB2_OPLOCK_BREAK cpu_to_le16(SMB2_OPLOCK_BREAK_HE) + +#define NUMBER_OF_SMB2_COMMANDS 0x0013 + +/* BB FIXME - analyze following length BB */ +#define MAX_SMB2_HDR_SIZE 0x78 /* 4 len + 64 hdr + (2*24 wct) + 2 bct + 2 pad */ + +/* * SMB2 Header Definition * * "MBZ" : Must be Zero diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index 08249eecdf69..0e59afb5edf9 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -34,4 +34,9 @@ struct statfs; */ extern int map_smb2_to_linux_error(char *buf, bool log_err); +extern int smb2_check_receive(struct mid_q_entry *mid, + struct TCP_Server_Info *server, bool log_error); +extern int smb2_setup_request(struct cifs_ses *ses, struct kvec *iov, + unsigned int nvec, struct mid_q_entry **ret_mid); + #endif /* _SMB2PROTO_H */ diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c new file mode 100644 index 000000000000..b4b6b9a6c0fb --- /dev/null +++ b/fs/cifs/smb2transport.c @@ -0,0 +1,151 @@ +/* + * fs/cifs/smb2transport.c + * + * Copyright (C) International Business Machines Corp., 2002, 2011 + * Etersoft, 2012 + * Author(s): Steve French (sfrench@us.ibm.com) + * Jeremy Allison (jra@samba.org) 2006 + * Pavel Shilovsky (pshilovsky@samba.org) 2012 + * + * This library is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published + * by the Free Software Foundation; either version 2.1 of the License, or + * (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/fs.h> +#include <linux/list.h> +#include <linux/wait.h> +#include <linux/net.h> +#include <linux/delay.h> +#include <linux/uaccess.h> +#include <asm/processor.h> +#include <linux/mempool.h> +#include "smb2pdu.h" +#include "cifsglob.h" +#include "cifsproto.h" +#include "smb2proto.h" +#include "cifs_debug.h" +#include "smb2status.h" + +/* + * Set message id for the request. Should be called after wait_for_free_request + * and when srv_mutex is held. + */ +static inline void +smb2_seq_num_into_buf(struct TCP_Server_Info *server, struct smb2_hdr *hdr) +{ + hdr->MessageId = get_next_mid(server); +} + +static struct mid_q_entry * +smb2_mid_entry_alloc(const struct smb2_hdr *smb_buffer, + struct TCP_Server_Info *server) +{ + struct mid_q_entry *temp; + + if (server == NULL) { + cERROR(1, "Null TCP session in smb2_mid_entry_alloc"); + return NULL; + } + + temp = mempool_alloc(cifs_mid_poolp, GFP_NOFS); + if (temp == NULL) + return temp; + else { + memset(temp, 0, sizeof(struct mid_q_entry)); + temp->mid = smb_buffer->MessageId; /* always LE */ + temp->pid = current->pid; + temp->command = smb_buffer->Command; /* Always LE */ + temp->when_alloc = jiffies; + temp->server = server; + + /* + * The default is for the mid to be synchronous, so the + * default callback just wakes up the current task. + */ + temp->callback = cifs_wake_up_task; + temp->callback_data = current; + } + + atomic_inc(&midCount); + temp->mid_state = MID_REQUEST_ALLOCATED; + return temp; +} + +static int +smb2_get_mid_entry(struct cifs_ses *ses, struct smb2_hdr *buf, + struct mid_q_entry **mid) +{ + if (ses->server->tcpStatus == CifsExiting) + return -ENOENT; + + if (ses->server->tcpStatus == CifsNeedReconnect) { + cFYI(1, "tcp session dead - return to caller to retry"); + return -EAGAIN; + } + + if (ses->status != CifsGood) { + /* check if SMB2 session is bad because we are setting it up */ + if ((buf->Command != SMB2_SESSION_SETUP) && + (buf->Command != SMB2_NEGOTIATE)) + return -EAGAIN; + /* else ok - we are setting up session */ + } + *mid = smb2_mid_entry_alloc(buf, ses->server); + if (*mid == NULL) + return -ENOMEM; + spin_lock(&GlobalMid_Lock); + list_add_tail(&(*mid)->qhead, &ses->server->pending_mid_q); + spin_unlock(&GlobalMid_Lock); + return 0; +} + +int +smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server, + bool log_error) +{ + unsigned int len = get_rfc1002_length(mid->resp_buf); + + dump_smb(mid->resp_buf, min_t(u32, 80, len)); + /* convert the length into a more usable form */ + /* BB - uncomment with SMB2 signing implementation */ + /* if ((len > 24) && + (server->sec_mode & (SECMODE_SIGN_REQUIRED|SECMODE_SIGN_ENABLED))) { + if (smb2_verify_signature(mid->resp_buf, server)) + cERROR(1, "Unexpected SMB signature"); + } */ + + return map_smb2_to_linux_error(mid->resp_buf, log_error); +} + +int +smb2_setup_request(struct cifs_ses *ses, struct kvec *iov, + unsigned int nvec, struct mid_q_entry **ret_mid) +{ + int rc; + struct smb2_hdr *hdr = (struct smb2_hdr *)iov[0].iov_base; + struct mid_q_entry *mid; + + smb2_seq_num_into_buf(ses->server, hdr); + + rc = smb2_get_mid_entry(ses, hdr, &mid); + if (rc) + return rc; + /* rc = smb2_sign_smb2(iov, nvec, ses->server); + if (rc) + delete_mid(mid); */ + *ret_mid = mid; + return rc; +} + +/* BB add missing functions here */ diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 904702db2526..bcc02b476f6e 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -35,10 +35,8 @@ #include "cifsproto.h" #include "cifs_debug.h" -extern mempool_t *cifs_mid_poolp; - -static void -wake_up_task(struct mid_q_entry *mid) +void +cifs_wake_up_task(struct mid_q_entry *mid) { wake_up_process(mid->callback_data); } @@ -65,12 +63,13 @@ AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server) /* do_gettimeofday(&temp->when_sent);*/ /* easier to use jiffies */ /* when mid allocated can be before when sent */ temp->when_alloc = jiffies; + temp->server = server; /* * The default is for the mid to be synchronous, so the * default callback just wakes up the current task. */ - temp->callback = wake_up_task; + temp->callback = cifs_wake_up_task; temp->callback_data = current; } @@ -83,6 +82,7 @@ void DeleteMidQEntry(struct mid_q_entry *midEntry) { #ifdef CONFIG_CIFS_STATS2 + __le16 command = midEntry->server->vals->lock_cmd; unsigned long now; #endif midEntry->mid_state = MID_FREE; @@ -96,8 +96,7 @@ DeleteMidQEntry(struct mid_q_entry *midEntry) /* commands taking longer than one second are indications that something is wrong, unless it is quite a slow link or server */ if ((now - midEntry->when_alloc) > HZ) { - if ((cifsFYI & CIFS_TIMER) && - (midEntry->command != cpu_to_le16(SMB_COM_LOCKING_ANDX))) { + if ((cifsFYI & CIFS_TIMER) && (midEntry->command != command)) { printk(KERN_DEBUG " CIFS slow rsp: cmd %d mid %llu", midEntry->command, midEntry->mid); printk(" A: 0x%lx S: 0x%lx R: 0x%lx\n", |