7a5cfb1965
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
384 lines
11 KiB
C
384 lines
11 KiB
C
/*
|
|
* SMB2 version specific operations
|
|
*
|
|
* Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License v2 as published
|
|
* by the Free Software Foundation.
|
|
*
|
|
* 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 "cifsglob.h"
|
|
#include "smb2pdu.h"
|
|
#include "smb2proto.h"
|
|
#include "cifsproto.h"
|
|
#include "cifs_debug.h"
|
|
|
|
static int
|
|
change_conf(struct TCP_Server_Info *server)
|
|
{
|
|
server->credits += server->echo_credits + server->oplock_credits;
|
|
server->oplock_credits = server->echo_credits = 0;
|
|
switch (server->credits) {
|
|
case 0:
|
|
return -1;
|
|
case 1:
|
|
server->echoes = false;
|
|
server->oplocks = false;
|
|
cERROR(1, "disabling echoes and oplocks");
|
|
break;
|
|
case 2:
|
|
server->echoes = true;
|
|
server->oplocks = false;
|
|
server->echo_credits = 1;
|
|
cFYI(1, "disabling oplocks");
|
|
break;
|
|
default:
|
|
server->echoes = true;
|
|
server->oplocks = true;
|
|
server->echo_credits = 1;
|
|
server->oplock_credits = 1;
|
|
}
|
|
server->credits -= server->echo_credits + server->oplock_credits;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
|
|
const int optype)
|
|
{
|
|
int *val, rc = 0;
|
|
spin_lock(&server->req_lock);
|
|
val = server->ops->get_credits_field(server, optype);
|
|
*val += add;
|
|
server->in_flight--;
|
|
if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
|
|
rc = change_conf(server);
|
|
spin_unlock(&server->req_lock);
|
|
wake_up(&server->request_q);
|
|
if (rc)
|
|
cifs_reconnect(server);
|
|
}
|
|
|
|
static void
|
|
smb2_set_credits(struct TCP_Server_Info *server, const int val)
|
|
{
|
|
spin_lock(&server->req_lock);
|
|
server->credits = val;
|
|
spin_unlock(&server->req_lock);
|
|
}
|
|
|
|
static int *
|
|
smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
|
|
{
|
|
switch (optype) {
|
|
case CIFS_ECHO_OP:
|
|
return &server->echo_credits;
|
|
case CIFS_OBREAK_OP:
|
|
return &server->oplock_credits;
|
|
default:
|
|
return &server->credits;
|
|
}
|
|
}
|
|
|
|
static unsigned int
|
|
smb2_get_credits(struct mid_q_entry *mid)
|
|
{
|
|
return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static struct mid_q_entry *
|
|
smb2_find_mid(struct TCP_Server_Info *server, char *buf)
|
|
{
|
|
struct mid_q_entry *mid;
|
|
struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
|
|
|
|
spin_lock(&GlobalMid_Lock);
|
|
list_for_each_entry(mid, &server->pending_mid_q, qhead) {
|
|
if ((mid->mid == hdr->MessageId) &&
|
|
(mid->mid_state == MID_REQUEST_SUBMITTED) &&
|
|
(mid->command == hdr->Command)) {
|
|
spin_unlock(&GlobalMid_Lock);
|
|
return mid;
|
|
}
|
|
}
|
|
spin_unlock(&GlobalMid_Lock);
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
smb2_dump_detail(void *buf)
|
|
{
|
|
#ifdef CONFIG_CIFS_DEBUG2
|
|
struct smb2_hdr *smb = (struct smb2_hdr *)buf;
|
|
|
|
cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d",
|
|
smb->Command, smb->Status, smb->Flags, smb->MessageId,
|
|
smb->ProcessId);
|
|
cERROR(1, "smb buf %p len %u", smb, smb2_calc_size(smb));
|
|
#endif
|
|
}
|
|
|
|
static bool
|
|
smb2_need_neg(struct TCP_Server_Info *server)
|
|
{
|
|
return server->max_read == 0;
|
|
}
|
|
|
|
static int
|
|
smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
|
|
{
|
|
int rc;
|
|
ses->server->CurrentMid = 0;
|
|
rc = SMB2_negotiate(xid, ses);
|
|
/* BB we probably don't need to retry with modern servers */
|
|
if (rc == -EAGAIN)
|
|
rc = -EHOSTDOWN;
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
|
|
struct cifs_sb_info *cifs_sb, const char *full_path)
|
|
{
|
|
int rc;
|
|
__u64 persistent_fid, volatile_fid;
|
|
__le16 *utf16_path;
|
|
|
|
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
|
|
if (!utf16_path)
|
|
return -ENOMEM;
|
|
|
|
rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
|
|
FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, NULL);
|
|
if (rc) {
|
|
kfree(utf16_path);
|
|
return rc;
|
|
}
|
|
|
|
rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
|
|
kfree(utf16_path);
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
|
|
struct cifs_sb_info *cifs_sb, const char *full_path,
|
|
u64 *uniqueid, FILE_ALL_INFO *data)
|
|
{
|
|
*uniqueid = le64_to_cpu(data->IndexNumber);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
struct cifs_fid *fid, FILE_ALL_INFO *data)
|
|
{
|
|
int rc;
|
|
struct smb2_file_all_info *smb2_data;
|
|
|
|
smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
|
|
GFP_KERNEL);
|
|
if (smb2_data == NULL)
|
|
return -ENOMEM;
|
|
|
|
rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
|
|
smb2_data);
|
|
if (!rc)
|
|
move_smb2_info_to_cifs(data, smb2_data);
|
|
kfree(smb2_data);
|
|
return rc;
|
|
}
|
|
|
|
static char *
|
|
smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
|
|
struct cifs_tcon *tcon)
|
|
{
|
|
int pplen = vol->prepath ? strlen(vol->prepath) : 0;
|
|
char *full_path = NULL;
|
|
|
|
/* if no prefix path, simply set path to the root of share to "" */
|
|
if (pplen == 0) {
|
|
full_path = kzalloc(2, GFP_KERNEL);
|
|
return full_path;
|
|
}
|
|
|
|
cERROR(1, "prefixpath is not supported for SMB2 now");
|
|
return NULL;
|
|
}
|
|
|
|
static bool
|
|
smb2_can_echo(struct TCP_Server_Info *server)
|
|
{
|
|
return server->echoes;
|
|
}
|
|
|
|
static void
|
|
smb2_clear_stats(struct cifs_tcon *tcon)
|
|
{
|
|
#ifdef CONFIG_CIFS_STATS
|
|
int i;
|
|
for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
|
|
atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
|
|
atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
|
|
{
|
|
#ifdef CONFIG_CIFS_STATS
|
|
atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
|
|
atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
|
|
seq_printf(m, "\nNegotiates: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_NEGOTIATE_HE]),
|
|
atomic_read(&failed[SMB2_NEGOTIATE_HE]));
|
|
seq_printf(m, "\nSessionSetups: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
|
|
atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
|
|
#define SMB2LOGOFF 0x0002 /* trivial request/resp */
|
|
seq_printf(m, "\nLogoffs: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_LOGOFF_HE]),
|
|
atomic_read(&failed[SMB2_LOGOFF_HE]));
|
|
seq_printf(m, "\nTreeConnects: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
|
|
atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
|
|
seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
|
|
atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
|
|
seq_printf(m, "\nCreates: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_CREATE_HE]),
|
|
atomic_read(&failed[SMB2_CREATE_HE]));
|
|
seq_printf(m, "\nCloses: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_CLOSE_HE]),
|
|
atomic_read(&failed[SMB2_CLOSE_HE]));
|
|
seq_printf(m, "\nFlushes: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_FLUSH_HE]),
|
|
atomic_read(&failed[SMB2_FLUSH_HE]));
|
|
seq_printf(m, "\nReads: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_READ_HE]),
|
|
atomic_read(&failed[SMB2_READ_HE]));
|
|
seq_printf(m, "\nWrites: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_WRITE_HE]),
|
|
atomic_read(&failed[SMB2_WRITE_HE]));
|
|
seq_printf(m, "\nLocks: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_LOCK_HE]),
|
|
atomic_read(&failed[SMB2_LOCK_HE]));
|
|
seq_printf(m, "\nIOCTLs: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_IOCTL_HE]),
|
|
atomic_read(&failed[SMB2_IOCTL_HE]));
|
|
seq_printf(m, "\nCancels: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_CANCEL_HE]),
|
|
atomic_read(&failed[SMB2_CANCEL_HE]));
|
|
seq_printf(m, "\nEchos: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_ECHO_HE]),
|
|
atomic_read(&failed[SMB2_ECHO_HE]));
|
|
seq_printf(m, "\nQueryDirectories: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
|
|
atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
|
|
seq_printf(m, "\nChangeNotifies: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
|
|
atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
|
|
seq_printf(m, "\nQueryInfos: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_QUERY_INFO_HE]),
|
|
atomic_read(&failed[SMB2_QUERY_INFO_HE]));
|
|
seq_printf(m, "\nSetInfos: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_SET_INFO_HE]),
|
|
atomic_read(&failed[SMB2_SET_INFO_HE]));
|
|
seq_printf(m, "\nOplockBreaks: %d sent %d failed",
|
|
atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
|
|
atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
|
|
{
|
|
/* struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); */
|
|
cfile->fid.persistent_fid = fid->persistent_fid;
|
|
cfile->fid.volatile_fid = fid->volatile_fid;
|
|
/* cifs_set_oplock_level(cinode, oplock); */
|
|
/* cinode->can_cache_brlcks = cinode->clientCanCacheAll; */
|
|
}
|
|
|
|
static int
|
|
smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
|
|
struct cifs_fid *fid)
|
|
{
|
|
return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
|
|
}
|
|
|
|
static int
|
|
smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
|
|
struct cifs_fid *fid)
|
|
{
|
|
return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
|
|
}
|
|
|
|
struct smb_version_operations smb21_operations = {
|
|
.setup_request = smb2_setup_request,
|
|
.setup_async_request = smb2_setup_async_request,
|
|
.check_receive = smb2_check_receive,
|
|
.add_credits = smb2_add_credits,
|
|
.set_credits = smb2_set_credits,
|
|
.get_credits_field = smb2_get_credits_field,
|
|
.get_credits = smb2_get_credits,
|
|
.get_next_mid = smb2_get_next_mid,
|
|
.find_mid = smb2_find_mid,
|
|
.check_message = smb2_check_message,
|
|
.dump_detail = smb2_dump_detail,
|
|
.clear_stats = smb2_clear_stats,
|
|
.print_stats = smb2_print_stats,
|
|
.need_neg = smb2_need_neg,
|
|
.negotiate = smb2_negotiate,
|
|
.sess_setup = SMB2_sess_setup,
|
|
.logoff = SMB2_logoff,
|
|
.tree_connect = SMB2_tcon,
|
|
.tree_disconnect = SMB2_tdis,
|
|
.is_path_accessible = smb2_is_path_accessible,
|
|
.can_echo = smb2_can_echo,
|
|
.echo = SMB2_echo,
|
|
.query_path_info = smb2_query_path_info,
|
|
.get_srv_inum = smb2_get_srv_inum,
|
|
.query_file_info = smb2_query_file_info,
|
|
.build_path_to_root = smb2_build_path_to_root,
|
|
.mkdir = smb2_mkdir,
|
|
.mkdir_setinfo = smb2_mkdir_setinfo,
|
|
.rmdir = smb2_rmdir,
|
|
.unlink = smb2_unlink,
|
|
.open = smb2_open_file,
|
|
.set_fid = smb2_set_fid,
|
|
.close = smb2_close_file,
|
|
.flush = smb2_flush_file,
|
|
};
|
|
|
|
struct smb_version_values smb21_values = {
|
|
.version_string = SMB21_VERSION_STRING,
|
|
.header_size = sizeof(struct smb2_hdr),
|
|
.max_header_size = MAX_SMB2_HDR_SIZE,
|
|
.lock_cmd = SMB2_LOCK,
|
|
.cap_unix = 0,
|
|
.cap_nt_find = SMB2_NT_FIND,
|
|
.cap_large_files = SMB2_LARGE_FILES,
|
|
};
|