linux/fs/cifs/smb2ops.c

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/*
* 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 <linux/pagemap.h>
#include <linux/vfs.h>
#include <linux/falloc.h>
#include <linux/scatterlist.h>
#include <linux/uuid.h>
#include <crypto/aead.h>
#include "cifsglob.h"
#include "smb2pdu.h"
#include "smb2proto.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifs_unicode.h"
#include "smb2status.h"
#include "smb2glob.h"
#include "cifs_ioctl.h"
#include "smbdirect.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;
cifs_dbg(VFS, "disabling echoes and oplocks\n");
break;
case 2:
server->echoes = true;
server->oplocks = false;
server->echo_credits = 1;
cifs_dbg(FYI, "disabling oplocks\n");
break;
default:
server->echoes = true;
if (enable_oplocks) {
server->oplocks = true;
server->oplock_credits = 1;
} else
server->oplocks = false;
server->echo_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;
if (*val > 65000) {
*val = 65000; /* Don't get near 64K credits, avoid srv bugs */
printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
}
server->in_flight--;
if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
rc = change_conf(server);
/*
* Sometimes server returns 0 credits on oplock break ack - we need to
* rebalance credits in this case.
*/
else if (server->in_flight > 0 && server->oplock_credits == 0 &&
server->oplocks) {
if (server->credits > 1) {
server->credits--;
server->oplock_credits++;
}
}
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)
{
struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
return le16_to_cpu(shdr->CreditRequest);
}
static int
smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
unsigned int *num, unsigned int *credits)
{
int rc = 0;
unsigned int scredits;
spin_lock(&server->req_lock);
while (1) {
if (server->credits <= 0) {
spin_unlock(&server->req_lock);
cifs_num_waiters_inc(server);
rc = wait_event_killable(server->request_q,
has_credits(server, &server->credits));
cifs_num_waiters_dec(server);
if (rc)
return rc;
spin_lock(&server->req_lock);
} else {
if (server->tcpStatus == CifsExiting) {
spin_unlock(&server->req_lock);
return -ENOENT;
}
scredits = server->credits;
/* can deadlock with reopen */
if (scredits == 1) {
*num = SMB2_MAX_BUFFER_SIZE;
*credits = 0;
break;
}
/* leave one credit for a possible reopen */
scredits--;
*num = min_t(unsigned int, size,
scredits * SMB2_MAX_BUFFER_SIZE);
*credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
server->credits -= *credits;
server->in_flight++;
break;
}
}
spin_unlock(&server->req_lock);
return rc;
}
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_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
__u64 wire_mid = le64_to_cpu(shdr->MessageId);
if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
cifs_dbg(VFS, "encrypted frame parsing not supported yet");
return NULL;
}
spin_lock(&GlobalMid_Lock);
list_for_each_entry(mid, &server->pending_mid_q, qhead) {
if ((mid->mid == wire_mid) &&
(mid->mid_state == MID_REQUEST_SUBMITTED) &&
(mid->command == shdr->Command)) {
spin_unlock(&GlobalMid_Lock);
return mid;
}
}
spin_unlock(&GlobalMid_Lock);
return NULL;
}
static void
smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
{
#ifdef CONFIG_CIFS_DEBUG2
struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
shdr->ProcessId);
cifs_dbg(VFS, "smb buf %p len %u\n", buf,
server->ops->calc_smb_size(buf, server));
#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 unsigned int
smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
{
struct TCP_Server_Info *server = tcon->ses->server;
unsigned int wsize;
/* start with specified wsize, or default */
wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
wsize = min_t(unsigned int, wsize, server->max_write);
#ifdef CONFIG_CIFS_SMB_DIRECT
if (server->rdma) {
if (server->sign)
wsize = min_t(unsigned int,
wsize, server->smbd_conn->max_fragmented_send_size);
else
wsize = min_t(unsigned int,
wsize, server->smbd_conn->max_readwrite_size);
}
#endif
if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
return wsize;
}
static unsigned int
smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
{
struct TCP_Server_Info *server = tcon->ses->server;
unsigned int rsize;
/* start with specified rsize, or default */
rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
rsize = min_t(unsigned int, rsize, server->max_read);
#ifdef CONFIG_CIFS_SMB_DIRECT
if (server->rdma) {
if (server->sign)
rsize = min_t(unsigned int,
rsize, server->smbd_conn->max_fragmented_recv_size);
else
rsize = min_t(unsigned int,
rsize, server->smbd_conn->max_readwrite_size);
}
#endif
if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
return rsize;
}
Query network adapter info at mount time for debugging When CONFIG_CIFS_STATS2 enabled query adapter info for debugging It is easy now in SMB3 to query the information about the server's network interfaces (and at least Windows 8 and above do this, if not other clients) there are some useful pieces of information you can get including: - all of the network interfaces that the server advertises (not just the one you are mounting over), and with SMB3 supporting multichannel this helps with more than just failover (also aggregating multiple sockets under one mount) - whether the adapter supports RSS (useful to know if you want to estimate whether setting up two or more socket connections to the same address is going to be faster due to RSS offload in the adapter) - whether the server supports RDMA - whether the server has IPv6 interfaces (if you connected over IPv4 but prefer IPv6 e.g.) - what the link speed is (you might want to reconnect over a higher speed interface if available) (Of course we could also rerequest this on every mount cheaplly to the same server, as Windows apparently does, so we can update the adapter info on new mounts, and also on every reconnect if the network interface drops temporarily - so we don't have to rely on info from the first mount to this server) It is trivial to request this information - and certainly will be useful when we get to the point of doing multichannel (and eventually RDMA), but some of this (linkspeed etc.) info may help for debugging in the meantime. Enable this request when CONFIG_CIFS_STATS2 is on (only for smb3 mounts since it is an SMB3 or later ioctl). Signed-off-by: Steve French <smfrench@gmail.com>
2013-10-14 06:21:53 +00:00
#ifdef CONFIG_CIFS_STATS2
static int
SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
{
int rc;
unsigned int ret_data_len = 0;
struct network_interface_info_ioctl_rsp *out_buf;
rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
NULL /* no data input */, 0 /* no data input */,
(char **)&out_buf, &ret_data_len);
if (rc != 0)
cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
cifs_dbg(VFS, "server returned bad net interface info buf\n");
rc = -EINVAL;
} else {
Query network adapter info at mount time for debugging When CONFIG_CIFS_STATS2 enabled query adapter info for debugging It is easy now in SMB3 to query the information about the server's network interfaces (and at least Windows 8 and above do this, if not other clients) there are some useful pieces of information you can get including: - all of the network interfaces that the server advertises (not just the one you are mounting over), and with SMB3 supporting multichannel this helps with more than just failover (also aggregating multiple sockets under one mount) - whether the adapter supports RSS (useful to know if you want to estimate whether setting up two or more socket connections to the same address is going to be faster due to RSS offload in the adapter) - whether the server supports RDMA - whether the server has IPv6 interfaces (if you connected over IPv4 but prefer IPv6 e.g.) - what the link speed is (you might want to reconnect over a higher speed interface if available) (Of course we could also rerequest this on every mount cheaplly to the same server, as Windows apparently does, so we can update the adapter info on new mounts, and also on every reconnect if the network interface drops temporarily - so we don't have to rely on info from the first mount to this server) It is trivial to request this information - and certainly will be useful when we get to the point of doing multichannel (and eventually RDMA), but some of this (linkspeed etc.) info may help for debugging in the meantime. Enable this request when CONFIG_CIFS_STATS2 is on (only for smb3 mounts since it is an SMB3 or later ioctl). Signed-off-by: Steve French <smfrench@gmail.com>
2013-10-14 06:21:53 +00:00
/* Dump info on first interface */
cifs_dbg(FYI, "Adapter Capability 0x%x\t",
le32_to_cpu(out_buf->Capability));
cifs_dbg(FYI, "Link Speed %lld\n",
le64_to_cpu(out_buf->LinkSpeed));
}
kfree(out_buf);
Query network adapter info at mount time for debugging When CONFIG_CIFS_STATS2 enabled query adapter info for debugging It is easy now in SMB3 to query the information about the server's network interfaces (and at least Windows 8 and above do this, if not other clients) there are some useful pieces of information you can get including: - all of the network interfaces that the server advertises (not just the one you are mounting over), and with SMB3 supporting multichannel this helps with more than just failover (also aggregating multiple sockets under one mount) - whether the adapter supports RSS (useful to know if you want to estimate whether setting up two or more socket connections to the same address is going to be faster due to RSS offload in the adapter) - whether the server supports RDMA - whether the server has IPv6 interfaces (if you connected over IPv4 but prefer IPv6 e.g.) - what the link speed is (you might want to reconnect over a higher speed interface if available) (Of course we could also rerequest this on every mount cheaplly to the same server, as Windows apparently does, so we can update the adapter info on new mounts, and also on every reconnect if the network interface drops temporarily - so we don't have to rely on info from the first mount to this server) It is trivial to request this information - and certainly will be useful when we get to the point of doing multichannel (and eventually RDMA), but some of this (linkspeed etc.) info may help for debugging in the meantime. Enable this request when CONFIG_CIFS_STATS2 is on (only for smb3 mounts since it is an SMB3 or later ioctl). Signed-off-by: Steve French <smfrench@gmail.com>
2013-10-14 06:21:53 +00:00
return rc;
}
#endif /* STATS2 */
void
smb2_cached_lease_break(struct work_struct *work)
{
struct cached_fid *cfid = container_of(work,
struct cached_fid, lease_break);
mutex_lock(&cfid->fid_mutex);
if (cfid->is_valid) {
cifs_dbg(FYI, "clear cached root file handle\n");
SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
cfid->fid->volatile_fid);
cfid->is_valid = false;
}
mutex_unlock(&cfid->fid_mutex);
}
/*
* Open the directory at the root of a share
*/
int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
{
struct cifs_open_parms oparams;
int rc;
__le16 srch_path = 0; /* Null - since an open of top of share */
u8 oplock = SMB2_OPLOCK_LEVEL_II;
mutex_lock(&tcon->crfid.fid_mutex);
if (tcon->crfid.is_valid) {
cifs_dbg(FYI, "found a cached root file handle\n");
memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
mutex_unlock(&tcon->crfid.fid_mutex);
return 0;
}
oparams.tcon = tcon;
oparams.create_options = 0;
oparams.desired_access = FILE_READ_ATTRIBUTES;
oparams.disposition = FILE_OPEN;
oparams.fid = pfid;
oparams.reconnect = false;
rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
if (rc == 0) {
memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
tcon->crfid.tcon = tcon;
tcon->crfid.is_valid = true;
}
mutex_unlock(&tcon->crfid.fid_mutex);
return rc;
}
static void
smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
{
int rc;
__le16 srch_path = 0; /* Null - open root of share */
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
bool no_cached_open = tcon->nohandlecache;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
if (no_cached_open)
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
NULL);
else
rc = open_shroot(xid, tcon, &fid);
if (rc)
return;
Query network adapter info at mount time for debugging When CONFIG_CIFS_STATS2 enabled query adapter info for debugging It is easy now in SMB3 to query the information about the server's network interfaces (and at least Windows 8 and above do this, if not other clients) there are some useful pieces of information you can get including: - all of the network interfaces that the server advertises (not just the one you are mounting over), and with SMB3 supporting multichannel this helps with more than just failover (also aggregating multiple sockets under one mount) - whether the adapter supports RSS (useful to know if you want to estimate whether setting up two or more socket connections to the same address is going to be faster due to RSS offload in the adapter) - whether the server supports RDMA - whether the server has IPv6 interfaces (if you connected over IPv4 but prefer IPv6 e.g.) - what the link speed is (you might want to reconnect over a higher speed interface if available) (Of course we could also rerequest this on every mount cheaplly to the same server, as Windows apparently does, so we can update the adapter info on new mounts, and also on every reconnect if the network interface drops temporarily - so we don't have to rely on info from the first mount to this server) It is trivial to request this information - and certainly will be useful when we get to the point of doing multichannel (and eventually RDMA), but some of this (linkspeed etc.) info may help for debugging in the meantime. Enable this request when CONFIG_CIFS_STATS2 is on (only for smb3 mounts since it is an SMB3 or later ioctl). Signed-off-by: Steve French <smfrench@gmail.com>
2013-10-14 06:21:53 +00:00
#ifdef CONFIG_CIFS_STATS2
SMB3_request_interfaces(xid, tcon);
#endif /* STATS2 */
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_ATTRIBUTE_INFORMATION);
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_DEVICE_INFORMATION);
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
if (no_cached_open)
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
return;
}
static void
smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
{
int rc;
__le16 srch_path = 0; /* Null - open root of share */
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
if (rc)
return;
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_ATTRIBUTE_INFORMATION);
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_DEVICE_INFORMATION);
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
return;
}
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;
__le16 *utf16_path;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
if ((*full_path == 0) && tcon->crfid.is_valid)
return 0;
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
if (rc) {
kfree(utf16_path);
return rc;
}
rc = SMB2_close(xid, tcon, fid.persistent_fid, 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) + PATH_MAX * 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;
}
#ifdef CONFIG_CIFS_XATTR
static ssize_t
move_smb2_ea_to_cifs(char *dst, size_t dst_size,
struct smb2_file_full_ea_info *src, size_t src_size,
const unsigned char *ea_name)
{
int rc = 0;
unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
char *name, *value;
size_t name_len, value_len, user_name_len;
while (src_size > 0) {
name = &src->ea_data[0];
name_len = (size_t)src->ea_name_length;
value = &src->ea_data[src->ea_name_length + 1];
value_len = (size_t)le16_to_cpu(src->ea_value_length);
if (name_len == 0) {
break;
}
if (src_size < 8 + name_len + 1 + value_len) {
cifs_dbg(FYI, "EA entry goes beyond length of list\n");
rc = -EIO;
goto out;
}
if (ea_name) {
if (ea_name_len == name_len &&
memcmp(ea_name, name, name_len) == 0) {
rc = value_len;
if (dst_size == 0)
goto out;
if (dst_size < value_len) {
rc = -ERANGE;
goto out;
}
memcpy(dst, value, value_len);
goto out;
}
} else {
/* 'user.' plus a terminating null */
user_name_len = 5 + 1 + name_len;
rc += user_name_len;
if (dst_size >= user_name_len) {
dst_size -= user_name_len;
memcpy(dst, "user.", 5);
dst += 5;
memcpy(dst, src->ea_data, name_len);
dst += name_len;
*dst = 0;
++dst;
} else if (dst_size == 0) {
/* skip copy - calc size only */
} else {
/* stop before overrun buffer */
rc = -ERANGE;
break;
}
}
if (!src->next_entry_offset)
break;
if (src_size < le32_to_cpu(src->next_entry_offset)) {
/* stop before overrun buffer */
rc = -ERANGE;
break;
}
src_size -= le32_to_cpu(src->next_entry_offset);
src = (void *)((char *)src +
le32_to_cpu(src->next_entry_offset));
}
/* didn't find the named attribute */
if (ea_name)
rc = -ENODATA;
out:
return (ssize_t)rc;
}
static ssize_t
smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
const unsigned char *path, const unsigned char *ea_name,
char *ea_data, size_t buf_size,
struct cifs_sb_info *cifs_sb)
{
int rc;
__le16 *utf16_path;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
struct smb2_file_full_ea_info *smb2_data;
int ea_buf_size = SMB2_MIN_EA_BUF;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_EA;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
kfree(utf16_path);
if (rc) {
cifs_dbg(FYI, "open failed rc=%d\n", rc);
return rc;
}
while (1) {
smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
if (smb2_data == NULL) {
SMB2_close(xid, tcon, fid.persistent_fid,
fid.volatile_fid);
return -ENOMEM;
}
rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
fid.volatile_fid,
ea_buf_size, smb2_data);
if (rc != -E2BIG)
break;
kfree(smb2_data);
ea_buf_size <<= 1;
if (ea_buf_size > SMB2_MAX_EA_BUF) {
cifs_dbg(VFS, "EA size is too large\n");
SMB2_close(xid, tcon, fid.persistent_fid,
fid.volatile_fid);
return -ENOMEM;
}
}
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
/*
* If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
* not an error. Otherwise, the specified ea_name was not found.
*/
if (!rc)
rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
SMB2_MAX_EA_BUF, ea_name);
else if (!ea_name && rc == -ENODATA)
rc = 0;
kfree(smb2_data);
return rc;
}
static int
smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
const char *path, const char *ea_name, const void *ea_value,
const __u16 ea_value_len, const struct nls_table *nls_codepage,
struct cifs_sb_info *cifs_sb)
{
int rc;
__le16 *utf16_path;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
struct smb2_file_full_ea_info *ea;
int ea_name_len = strlen(ea_name);
int len;
if (ea_name_len > 255)
return -EINVAL;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
oparms.tcon = tcon;
oparms.desired_access = FILE_WRITE_EA;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
kfree(utf16_path);
if (rc) {
cifs_dbg(FYI, "open failed rc=%d\n", rc);
return rc;
}
len = sizeof(ea) + ea_name_len + ea_value_len + 1;
ea = kzalloc(len, GFP_KERNEL);
if (ea == NULL) {
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
return -ENOMEM;
}
ea->ea_name_length = ea_name_len;
ea->ea_value_length = cpu_to_le16(ea_value_len);
memcpy(ea->ea_data, ea_name, ea_name_len + 1);
memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
len);
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
return rc;
}
#endif
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_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
{
seq_puts(m, "\n\tShare Capabilities:");
if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
seq_puts(m, " DFS,");
if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
seq_puts(m, " CONTINUOUS AVAILABILITY,");
if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
seq_puts(m, " SCALEOUT,");
if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
seq_puts(m, " CLUSTER,");
if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
seq_puts(m, " ASYMMETRIC,");
if (tcon->capabilities == 0)
seq_puts(m, " None");
if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
seq_puts(m, " Aligned,");
if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
seq_puts(m, " Partition Aligned,");
if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
seq_puts(m, " SSD,");
if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
seq_puts(m, " TRIM-support,");
seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
if (tcon->perf_sector_size)
seq_printf(m, "\tOptimal sector size: 0x%x",
tcon->perf_sector_size);
seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
}
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]));
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(d_inode(cfile->dentry));
struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
cfile->fid.persistent_fid = fid->persistent_fid;
cfile->fid.volatile_fid = fid->volatile_fid;
server->ops->set_oplock_level(cinode, oplock, fid->epoch,
&fid->purge_cache);
cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
memcpy(cfile->fid.create_guid, fid->create_guid, 16);
}
static void
smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *fid)
{
SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
}
static int
SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid,
struct copychunk_ioctl *pcchunk)
{
int rc;
unsigned int ret_data_len;
struct resume_key_req *res_key;
rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
NULL, 0 /* no input */,
(char **)&res_key, &ret_data_len);
if (rc) {
cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
goto req_res_key_exit;
}
if (ret_data_len < sizeof(struct resume_key_req)) {
cifs_dbg(VFS, "Invalid refcopy resume key length\n");
rc = -EINVAL;
goto req_res_key_exit;
}
memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
req_res_key_exit:
kfree(res_key);
return rc;
}
static ssize_t
smb2_copychunk_range(const unsigned int xid,
struct cifsFileInfo *srcfile,
struct cifsFileInfo *trgtfile, u64 src_off,
u64 len, u64 dest_off)
{
int rc;
unsigned int ret_data_len;
struct copychunk_ioctl *pcchunk;
struct copychunk_ioctl_rsp *retbuf = NULL;
struct cifs_tcon *tcon;
int chunks_copied = 0;
bool chunk_sizes_updated = false;
ssize_t bytes_written, total_bytes_written = 0;
pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
if (pcchunk == NULL)
return -ENOMEM;
cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
/* Request a key from the server to identify the source of the copy */
rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
srcfile->fid.persistent_fid,
srcfile->fid.volatile_fid, pcchunk);
/* Note: request_res_key sets res_key null only if rc !=0 */
if (rc)
goto cchunk_out;
/* For now array only one chunk long, will make more flexible later */
pcchunk->ChunkCount = cpu_to_le32(1);
pcchunk->Reserved = 0;
pcchunk->Reserved2 = 0;
tcon = tlink_tcon(trgtfile->tlink);
while (len > 0) {
pcchunk->SourceOffset = cpu_to_le64(src_off);
pcchunk->TargetOffset = cpu_to_le64(dest_off);
pcchunk->Length =
cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
/* Request server copy to target from src identified by key */
rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
true /* is_fsctl */, (char *)pcchunk,
sizeof(struct copychunk_ioctl), (char **)&retbuf,
&ret_data_len);
if (rc == 0) {
if (ret_data_len !=
sizeof(struct copychunk_ioctl_rsp)) {
cifs_dbg(VFS, "invalid cchunk response size\n");
rc = -EIO;
goto cchunk_out;
}
if (retbuf->TotalBytesWritten == 0) {
cifs_dbg(FYI, "no bytes copied\n");
rc = -EIO;
goto cchunk_out;
}
/*
* Check if server claimed to write more than we asked
*/
if (le32_to_cpu(retbuf->TotalBytesWritten) >
le32_to_cpu(pcchunk->Length)) {
cifs_dbg(VFS, "invalid copy chunk response\n");
rc = -EIO;
goto cchunk_out;
}
if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
cifs_dbg(VFS, "invalid num chunks written\n");
rc = -EIO;
goto cchunk_out;
}
chunks_copied++;
bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
src_off += bytes_written;
dest_off += bytes_written;
len -= bytes_written;
total_bytes_written += bytes_written;
cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
le32_to_cpu(retbuf->ChunksWritten),
le32_to_cpu(retbuf->ChunkBytesWritten),
bytes_written);
} else if (rc == -EINVAL) {
if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
goto cchunk_out;
cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
le32_to_cpu(retbuf->ChunksWritten),
le32_to_cpu(retbuf->ChunkBytesWritten),
le32_to_cpu(retbuf->TotalBytesWritten));
/*
* Check if this is the first request using these sizes,
* (ie check if copy succeed once with original sizes
* and check if the server gave us different sizes after
* we already updated max sizes on previous request).
* if not then why is the server returning an error now
*/
if ((chunks_copied != 0) || chunk_sizes_updated)
goto cchunk_out;
/* Check that server is not asking us to grow size */
if (le32_to_cpu(retbuf->ChunkBytesWritten) <
tcon->max_bytes_chunk)
tcon->max_bytes_chunk =
le32_to_cpu(retbuf->ChunkBytesWritten);
else
goto cchunk_out; /* server gave us bogus size */
/* No need to change MaxChunks since already set to 1 */
chunk_sizes_updated = true;
} else
goto cchunk_out;
}
cchunk_out:
kfree(pcchunk);
kfree(retbuf);
if (rc)
return rc;
else
return total_bytes_written;
}
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);
}
static unsigned int
smb2_read_data_offset(char *buf)
{
struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
return rsp->DataOffset;
}
static unsigned int
smb2_read_data_length(char *buf, bool in_remaining)
{
struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
if (in_remaining)
return le32_to_cpu(rsp->DataRemaining);
return le32_to_cpu(rsp->DataLength);
}
static int
smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
struct cifs_io_parms *parms, unsigned int *bytes_read,
char **buf, int *buf_type)
{
parms->persistent_fid = pfid->persistent_fid;
parms->volatile_fid = pfid->volatile_fid;
return SMB2_read(xid, parms, bytes_read, buf, buf_type);
}
static int
smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
struct cifs_io_parms *parms, unsigned int *written,
struct kvec *iov, unsigned long nr_segs)
{
parms->persistent_fid = pfid->persistent_fid;
parms->volatile_fid = pfid->volatile_fid;
return SMB2_write(xid, parms, written, iov, nr_segs);
}
/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
{
struct cifsInodeInfo *cifsi;
int rc;
cifsi = CIFS_I(inode);
/* if file already sparse don't bother setting sparse again */
if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
return true; /* already sparse */
if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
return true; /* already not sparse */
/*
* Can't check for sparse support on share the usual way via the
* FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
* since Samba server doesn't set the flag on the share, yet
* supports the set sparse FSCTL and returns sparse correctly
* in the file attributes. If we fail setting sparse though we
* mark that server does not support sparse files for this share
* to avoid repeatedly sending the unsupported fsctl to server
* if the file is repeatedly extended.
*/
if (tcon->broken_sparse_sup)
return false;
rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
true /* is_fctl */,
&setsparse, 1, NULL, NULL);
if (rc) {
tcon->broken_sparse_sup = true;
cifs_dbg(FYI, "set sparse rc = %d\n", rc);
return false;
}
if (setsparse)
cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
else
cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
return true;
}
static int
smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
{
__le64 eof = cpu_to_le64(size);
struct inode *inode;
/*
* If extending file more than one page make sparse. Many Linux fs
* make files sparse by default when extending via ftruncate
*/
inode = d_inode(cfile->dentry);
if (!set_alloc && (size > inode->i_size + 8192)) {
__u8 set_sparse = 1;
/* whether set sparse succeeds or not, extend the file */
smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
}
return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, cfile->pid, &eof, false);
}
static int
smb2_duplicate_extents(const unsigned int xid,
struct cifsFileInfo *srcfile,
struct cifsFileInfo *trgtfile, u64 src_off,
u64 len, u64 dest_off)
{
int rc;
unsigned int ret_data_len;
struct duplicate_extents_to_file dup_ext_buf;
struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
/* server fileays advertise duplicate extent support with this flag */
if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
return -EOPNOTSUPP;
dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
dup_ext_buf.ByteCount = cpu_to_le64(len);
cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
src_off, dest_off, len);
rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
if (rc)
goto duplicate_extents_out;
rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
trgtfile->fid.volatile_fid,
FSCTL_DUPLICATE_EXTENTS_TO_FILE,
true /* is_fsctl */,
(char *)&dup_ext_buf,
sizeof(struct duplicate_extents_to_file),
NULL,
&ret_data_len);
if (ret_data_len > 0)
cifs_dbg(FYI, "non-zero response length in duplicate extents");
duplicate_extents_out:
return rc;
}
static int
smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile)
{
return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid);
}
static int
smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile)
{
struct fsctl_set_integrity_information_req integr_info;
unsigned int ret_data_len;
integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
integr_info.Flags = 0;
integr_info.Reserved = 0;
return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
FSCTL_SET_INTEGRITY_INFORMATION,
true /* is_fsctl */,
(char *)&integr_info,
sizeof(struct fsctl_set_integrity_information_req),
NULL,
&ret_data_len);
}
static int
smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile, void __user *ioc_buf)
{
char *retbuf = NULL;
unsigned int ret_data_len = 0;
int rc;
struct smb_snapshot_array snapshot_in;
rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
FSCTL_SRV_ENUMERATE_SNAPSHOTS,
true /* is_fsctl */,
NULL, 0 /* no input data */,
(char **)&retbuf,
&ret_data_len);
cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
rc, ret_data_len);
if (rc)
return rc;
if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
/* Fixup buffer */
if (copy_from_user(&snapshot_in, ioc_buf,
sizeof(struct smb_snapshot_array))) {
rc = -EFAULT;
kfree(retbuf);
return rc;
}
if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
rc = -ERANGE;
kfree(retbuf);
return rc;
}
if (ret_data_len > snapshot_in.snapshot_array_size)
ret_data_len = snapshot_in.snapshot_array_size;
if (copy_to_user(ioc_buf, retbuf, ret_data_len))
rc = -EFAULT;
}
kfree(retbuf);
return rc;
}
static int
smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
const char *path, struct cifs_sb_info *cifs_sb,
struct cifs_fid *fid, __u16 search_flags,
struct cifs_search_info *srch_inf)
{
__le16 *utf16_path;
int rc;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
kfree(utf16_path);
if (rc) {
cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
return rc;
}
srch_inf->entries_in_buffer = 0;
srch_inf->index_of_last_entry = 0;
rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
fid->volatile_fid, 0, srch_inf);
if (rc) {
cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
}
return rc;
}
static int
smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *fid, __u16 search_flags,
struct cifs_search_info *srch_inf)
{
return SMB2_query_directory(xid, tcon, fid->persistent_fid,
fid->volatile_fid, 0, srch_inf);
}
static int
smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *fid)
{
return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
}
/*
* If we negotiate SMB2 protocol and get STATUS_PENDING - update
* the number of credits and return true. Otherwise - return false.
*/
static bool
smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
{
struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
if (shdr->Status != STATUS_PENDING)
return false;
if (!length) {
spin_lock(&server->req_lock);
server->credits += le16_to_cpu(shdr->CreditRequest);
spin_unlock(&server->req_lock);
wake_up(&server->request_q);
}
return true;
}
static bool
smb2_is_session_expired(char *buf)
{
struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
shdr->Status != STATUS_USER_SESSION_DELETED)
return false;
cifs_dbg(FYI, "Session expired or deleted\n");
return true;
}
static int
smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
struct cifsInodeInfo *cinode)
{
if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
return SMB2_lease_break(0, tcon, cinode->lease_key,
smb2_get_lease_state(cinode));
return SMB2_oplock_break(0, tcon, fid->persistent_fid,
fid->volatile_fid,
CIFS_CACHE_READ(cinode) ? 1 : 0);
}
static int
smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
struct kstatfs *buf)
{
int rc;
__le16 srch_path = 0; /* Null - open root of share */
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
if (rc)
return rc;
buf->f_type = SMB2_MAGIC_NUMBER;
rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
buf);
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
return rc;
}
static bool
smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
{
return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
ob1->fid.volatile_fid == ob2->fid.volatile_fid;
}
static int
smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
__u64 length, __u32 type, int lock, int unlock, bool wait)
{
if (unlock && !lock)
type = SMB2_LOCKFLAG_UNLOCK;
return SMB2_lock(xid, tlink_tcon(cfile->tlink),
cfile->fid.persistent_fid, cfile->fid.volatile_fid,
current->tgid, length, offset, type, wait);
}
static void
smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
{
memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
}
static void
smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
{
memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
}
static void
smb2_new_lease_key(struct cifs_fid *fid)
{
generate_random_uuid(fid->lease_key);
}
static int
smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
const char *search_name,
struct dfs_info3_param **target_nodes,
unsigned int *num_of_nodes,
const struct nls_table *nls_codepage, int remap)
{
int rc;
__le16 *utf16_path = NULL;
int utf16_path_len = 0;
struct cifs_tcon *tcon;
struct fsctl_get_dfs_referral_req *dfs_req = NULL;
struct get_dfs_referral_rsp *dfs_rsp = NULL;
u32 dfs_req_size = 0, dfs_rsp_size = 0;
cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
/*
* Try to use the IPC tcon, otherwise just use any
*/
tcon = ses->tcon_ipc;
if (tcon == NULL) {
spin_lock(&cifs_tcp_ses_lock);
tcon = list_first_entry_or_null(&ses->tcon_list,
struct cifs_tcon,
tcon_list);
if (tcon)
tcon->tc_count++;
spin_unlock(&cifs_tcp_ses_lock);
}
if (tcon == NULL) {
cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
ses);
rc = -ENOTCONN;
goto out;
}
utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
&utf16_path_len,
nls_codepage, remap);
if (!utf16_path) {
rc = -ENOMEM;
goto out;
}
dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
if (!dfs_req) {
rc = -ENOMEM;
goto out;
}
/* Highest DFS referral version understood */
dfs_req->MaxReferralLevel = DFS_VERSION;
/* Path to resolve in an UTF-16 null-terminated string */
memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
do {
rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
FSCTL_DFS_GET_REFERRALS,
true /* is_fsctl */,
(char *)dfs_req, dfs_req_size,
(char **)&dfs_rsp, &dfs_rsp_size);
} while (rc == -EAGAIN);
if (rc) {
if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
goto out;
}
rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
num_of_nodes, target_nodes,
nls_codepage, remap, search_name,
true /* is_unicode */);
if (rc) {
cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
goto out;
}
out:
if (tcon && !tcon->ipc) {
/* ipc tcons are not refcounted */
spin_lock(&cifs_tcp_ses_lock);
tcon->tc_count--;
spin_unlock(&cifs_tcp_ses_lock);
}
kfree(utf16_path);
kfree(dfs_req);
kfree(dfs_rsp);
return rc;
}
#define SMB2_SYMLINK_STRUCT_SIZE \
(sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
static int
smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
const char *full_path, char **target_path,
struct cifs_sb_info *cifs_sb)
{
int rc;
__le16 *utf16_path;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
struct kvec err_iov = {NULL, 0};
struct smb2_err_rsp *err_buf = NULL;
int resp_buftype;
struct smb2_symlink_err_rsp *symlink;
unsigned int sub_len;
unsigned int sub_offset;
unsigned int print_len;
unsigned int print_offset;
cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
&resp_buftype);
if (!rc || !err_iov.iov_base) {
rc = -ENOENT;
goto querty_exit;
}
err_buf = err_iov.iov_base;
if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
rc = -ENOENT;
goto querty_exit;
}
/* open must fail on symlink - reset rc */
rc = 0;
symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
sub_len = le16_to_cpu(symlink->SubstituteNameLength);
sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
print_len = le16_to_cpu(symlink->PrintNameLength);
print_offset = le16_to_cpu(symlink->PrintNameOffset);
if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
rc = -ENOENT;
goto querty_exit;
}
if (err_iov.iov_len <
SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
rc = -ENOENT;
goto querty_exit;
}
*target_path = cifs_strndup_from_utf16(
(char *)symlink->PathBuffer + sub_offset,
sub_len, true, cifs_sb->local_nls);
if (!(*target_path)) {
rc = -ENOMEM;
goto querty_exit;
}
convert_delimiter(*target_path, '/');
cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
querty_exit:
free_rsp_buf(resp_buftype, err_buf);
kfree(utf16_path);
return rc;
}
#ifdef CONFIG_CIFS_ACL
static struct cifs_ntsd *
get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
const struct cifs_fid *cifsfid, u32 *pacllen)
{
struct cifs_ntsd *pntsd = NULL;
unsigned int xid;
int rc = -EOPNOTSUPP;
struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
if (IS_ERR(tlink))
return ERR_CAST(tlink);
xid = get_xid();
cifs_dbg(FYI, "trying to get acl\n");
rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
cifsfid->volatile_fid, (void **)&pntsd, pacllen);
free_xid(xid);
cifs_put_tlink(tlink);
cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
if (rc)
return ERR_PTR(rc);
return pntsd;
}
static struct cifs_ntsd *
get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
const char *path, u32 *pacllen)
{
struct cifs_ntsd *pntsd = NULL;
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
unsigned int xid;
int rc;
struct cifs_tcon *tcon;
struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
struct cifs_fid fid;
struct cifs_open_parms oparms;
__le16 *utf16_path;
cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
if (IS_ERR(tlink))
return ERR_CAST(tlink);
tcon = tlink_tcon(tlink);
xid = get_xid();
if (backup_cred(cifs_sb))
oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
else
oparms.create_options = 0;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path) {
rc = -ENOMEM;
free_xid(xid);
return ERR_PTR(rc);
}
oparms.tcon = tcon;
oparms.desired_access = READ_CONTROL;
oparms.disposition = FILE_OPEN;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
kfree(utf16_path);
if (!rc) {
rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
fid.volatile_fid, (void **)&pntsd, pacllen);
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
}
cifs_put_tlink(tlink);
free_xid(xid);
cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
if (rc)
return ERR_PTR(rc);
return pntsd;
}
#ifdef CONFIG_CIFS_ACL
static int
set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
struct inode *inode, const char *path, int aclflag)
{
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
unsigned int xid;
int rc, access_flags = 0;
struct cifs_tcon *tcon;
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
struct cifs_fid fid;
struct cifs_open_parms oparms;
__le16 *utf16_path;
cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
if (IS_ERR(tlink))
return PTR_ERR(tlink);
tcon = tlink_tcon(tlink);
xid = get_xid();
if (backup_cred(cifs_sb))
oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
else
oparms.create_options = 0;
if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
access_flags = WRITE_OWNER;
else
access_flags = WRITE_DAC;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path) {
rc = -ENOMEM;
free_xid(xid);
return rc;
}
oparms.tcon = tcon;
oparms.desired_access = access_flags;
oparms.disposition = FILE_OPEN;
oparms.path = path;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
kfree(utf16_path);
if (!rc) {
rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
fid.volatile_fid, pnntsd, acllen, aclflag);
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
}
cifs_put_tlink(tlink);
free_xid(xid);
return rc;
}
#endif /* CIFS_ACL */
/* Retrieve an ACL from the server */
static struct cifs_ntsd *
get_smb2_acl(struct cifs_sb_info *cifs_sb,
struct inode *inode, const char *path,
u32 *pacllen)
{
struct cifs_ntsd *pntsd = NULL;
struct cifsFileInfo *open_file = NULL;
if (inode)
open_file = find_readable_file(CIFS_I(inode), true);
if (!open_file)
return get_smb2_acl_by_path(cifs_sb, path, pacllen);
pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
cifsFileInfo_put(open_file);
return pntsd;
}
#endif
static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
loff_t offset, loff_t len, bool keep_size)
{
struct inode *inode;
struct cifsInodeInfo *cifsi;
struct cifsFileInfo *cfile = file->private_data;
struct file_zero_data_information fsctl_buf;
long rc;
unsigned int xid;
xid = get_xid();
inode = d_inode(cfile->dentry);
cifsi = CIFS_I(inode);
/* if file not oplocked can't be sure whether asking to extend size */
if (!CIFS_CACHE_READ(cifsi))
if (keep_size == false) {
rc = -EOPNOTSUPP;
free_xid(xid);
return rc;
}
/*
* Must check if file sparse since fallocate -z (zero range) assumes
* non-sparse allocation
*/
if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
rc = -EOPNOTSUPP;
free_xid(xid);
return rc;
}
/*
* need to make sure we are not asked to extend the file since the SMB3
* fsctl does not change the file size. In the future we could change
* this to zero the first part of the range then set the file size
* which for a non sparse file would zero the newly extended range
*/
if (keep_size == false)
if (i_size_read(inode) < offset + len) {
rc = -EOPNOTSUPP;
free_xid(xid);
return rc;
}
cifs_dbg(FYI, "offset %lld len %lld", offset, len);
fsctl_buf.FileOffset = cpu_to_le64(offset);
fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
true /* is_fctl */, (char *)&fsctl_buf,
sizeof(struct file_zero_data_information), NULL, NULL);
free_xid(xid);
return rc;
}
static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
loff_t offset, loff_t len)
{
struct inode *inode;
struct cifsInodeInfo *cifsi;
struct cifsFileInfo *cfile = file->private_data;
struct file_zero_data_information fsctl_buf;
long rc;
unsigned int xid;
__u8 set_sparse = 1;
xid = get_xid();
inode = d_inode(cfile->dentry);
cifsi = CIFS_I(inode);
/* Need to make file sparse, if not already, before freeing range. */
/* Consider adding equivalent for compressed since it could also work */
if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
rc = -EOPNOTSUPP;
free_xid(xid);
return rc;
}
cifs_dbg(FYI, "offset %lld len %lld", offset, len);
fsctl_buf.FileOffset = cpu_to_le64(offset);
fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
true /* is_fctl */, (char *)&fsctl_buf,
sizeof(struct file_zero_data_information), NULL, NULL);
free_xid(xid);
return rc;
}
static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
loff_t off, loff_t len, bool keep_size)
{
struct inode *inode;
struct cifsInodeInfo *cifsi;
struct cifsFileInfo *cfile = file->private_data;
long rc = -EOPNOTSUPP;
unsigned int xid;
xid = get_xid();
inode = d_inode(cfile->dentry);
cifsi = CIFS_I(inode);
/* if file not oplocked can't be sure whether asking to extend size */
if (!CIFS_CACHE_READ(cifsi))
if (keep_size == false) {
free_xid(xid);
return rc;
}
/*
* Files are non-sparse by default so falloc may be a no-op
* Must check if file sparse. If not sparse, and not extending
* then no need to do anything since file already allocated
*/
if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
if (keep_size == true)
rc = 0;
/* check if extending file */
else if (i_size_read(inode) >= off + len)
/* not extending file and already not sparse */
rc = 0;
/* BB: in future add else clause to extend file */
else
rc = -EOPNOTSUPP;
free_xid(xid);
return rc;
}
if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
/*
* Check if falloc starts within first few pages of file
* and ends within a few pages of the end of file to
* ensure that most of file is being forced to be
* fallocated now. If so then setting whole file sparse
* ie potentially making a few extra pages at the beginning
* or end of the file non-sparse via set_sparse is harmless.
*/
if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
rc = -EOPNOTSUPP;
free_xid(xid);
return rc;
}
rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
}
/* BB: else ... in future add code to extend file and set sparse */
free_xid(xid);
return rc;
}
static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
loff_t off, loff_t len)
{
/* KEEP_SIZE already checked for by do_fallocate */
if (mode & FALLOC_FL_PUNCH_HOLE)
return smb3_punch_hole(file, tcon, off, len);
else if (mode & FALLOC_FL_ZERO_RANGE) {
if (mode & FALLOC_FL_KEEP_SIZE)
return smb3_zero_range(file, tcon, off, len, true);
return smb3_zero_range(file, tcon, off, len, false);
} else if (mode == FALLOC_FL_KEEP_SIZE)
return smb3_simple_falloc(file, tcon, off, len, true);
else if (mode == 0)
return smb3_simple_falloc(file, tcon, off, len, false);
return -EOPNOTSUPP;
}
cifs: Wait for writebacks to complete before attempting write. Problem reported in Red Hat bz 1040329 for strict writes where we cache only when we hold oplock and write direct to the server when we don't. When we receive an oplock break, we first change the oplock value for the inode in cifsInodeInfo->oplock to indicate that we no longer hold the oplock before we enqueue a task to flush changes to the backing device. Once we have completed flushing the changes, we return the oplock to the server. There are 2 ways here where we can have data corruption 1) While we flush changes to the backing device as part of the oplock break, we can have processes write to the file. These writes check for the oplock, find none and attempt to write directly to the server. These direct writes made while we are flushing from cache could be overwritten by data being flushed from the cache causing data corruption. 2) While a thread runs in cifs_strict_writev, the machine could receive and process an oplock break after the thread has checked the oplock and found that it allows us to cache and before we have made changes to the cache. In that case, we end up with a dirty page in cache when we shouldn't have any. This will be flushed later and will overwrite all subsequent writes to the part of the file represented by this page. Before making any writes to the server, we need to confirm that we are not in the process of flushing data to the server and if we are, we should wait until the process is complete before we attempt the write. We should also wait for existing writes to complete before we process an oplock break request which changes oplock values. We add a version specific downgrade_oplock() operation to allow for differences in the oplock values set for the different smb versions. Cc: stable@vger.kernel.org Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2014-03-11 16:11:47 +00:00
static void
smb2_downgrade_oplock(struct TCP_Server_Info *server,
struct cifsInodeInfo *cinode, bool set_level2)
{
if (set_level2)
server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
0, NULL);
else
server->ops->set_oplock_level(cinode, 0, 0, NULL);
}
static void
smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
unsigned int epoch, bool *purge_cache)
{
oplock &= 0xFF;
if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
return;
if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
cinode->oplock = CIFS_CACHE_RHW_FLG;
cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
&cinode->vfs_inode);
} else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
cinode->oplock = CIFS_CACHE_RW_FLG;
cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
&cinode->vfs_inode);
} else if (oplock == SMB2_OPLOCK_LEVEL_II) {
cinode->oplock = CIFS_CACHE_READ_FLG;
cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
&cinode->vfs_inode);
} else
cinode->oplock = 0;
}
static void
smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
unsigned int epoch, bool *purge_cache)
{
char message[5] = {0};
oplock &= 0xFF;
if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
return;
cinode->oplock = 0;
if (oplock & SMB2_LEASE_READ_CACHING_HE) {
cinode->oplock |= CIFS_CACHE_READ_FLG;
strcat(message, "R");
}
if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
strcat(message, "H");
}
if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
cinode->oplock |= CIFS_CACHE_WRITE_FLG;
strcat(message, "W");
}
if (!cinode->oplock)
strcat(message, "None");
cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
&cinode->vfs_inode);
}
static void
smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
unsigned int epoch, bool *purge_cache)
{
unsigned int old_oplock = cinode->oplock;
smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
if (purge_cache) {
*purge_cache = false;
if (old_oplock == CIFS_CACHE_READ_FLG) {
if (cinode->oplock == CIFS_CACHE_READ_FLG &&
(epoch - cinode->epoch > 0))
*purge_cache = true;
else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
(epoch - cinode->epoch > 1))
*purge_cache = true;
else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
(epoch - cinode->epoch > 1))
*purge_cache = true;
else if (cinode->oplock == 0 &&
(epoch - cinode->epoch > 0))
*purge_cache = true;
} else if (old_oplock == CIFS_CACHE_RH_FLG) {
if (cinode->oplock == CIFS_CACHE_RH_FLG &&
(epoch - cinode->epoch > 0))
*purge_cache = true;
else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
(epoch - cinode->epoch > 1))
*purge_cache = true;
}
cinode->epoch = epoch;
}
}
static bool
smb2_is_read_op(__u32 oplock)
{
return oplock == SMB2_OPLOCK_LEVEL_II;
}
static bool
smb21_is_read_op(__u32 oplock)
{
return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
!(oplock & SMB2_LEASE_WRITE_CACHING_HE);
}
static __le32
map_oplock_to_lease(u8 oplock)
{
if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
else if (oplock == SMB2_OPLOCK_LEVEL_II)
return SMB2_LEASE_READ_CACHING;
else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
SMB2_LEASE_WRITE_CACHING;
return 0;
}
static char *
smb2_create_lease_buf(u8 *lease_key, u8 oplock)
{
struct create_lease *buf;
buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
if (!buf)
return NULL;
buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
buf->ccontext.DataOffset = cpu_to_le16(offsetof
(struct create_lease, lcontext));
buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
buf->ccontext.NameOffset = cpu_to_le16(offsetof
(struct create_lease, Name));
buf->ccontext.NameLength = cpu_to_le16(4);
/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
buf->Name[0] = 'R';
buf->Name[1] = 'q';
buf->Name[2] = 'L';
buf->Name[3] = 's';
return (char *)buf;
}
static char *
smb3_create_lease_buf(u8 *lease_key, u8 oplock)
{
struct create_lease_v2 *buf;
buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
if (!buf)
return NULL;
buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
buf->ccontext.DataOffset = cpu_to_le16(offsetof
(struct create_lease_v2, lcontext));
buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
buf->ccontext.NameOffset = cpu_to_le16(offsetof
(struct create_lease_v2, Name));
buf->ccontext.NameLength = cpu_to_le16(4);
/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
buf->Name[0] = 'R';
buf->Name[1] = 'q';
buf->Name[2] = 'L';
buf->Name[3] = 's';
return (char *)buf;
}
static __u8
smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
{
struct create_lease *lc = (struct create_lease *)buf;
*epoch = 0; /* not used */
if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
return SMB2_OPLOCK_LEVEL_NOCHANGE;
return le32_to_cpu(lc->lcontext.LeaseState);
}
static __u8
smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
{
struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
*epoch = le16_to_cpu(lc->lcontext.Epoch);
if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
return SMB2_OPLOCK_LEVEL_NOCHANGE;
if (lease_key)
memcpy(lease_key, &lc->lcontext.LeaseKeyLow,
SMB2_LEASE_KEY_SIZE);
return le32_to_cpu(lc->lcontext.LeaseState);
}
static unsigned int
smb2_wp_retry_size(struct inode *inode)
{
return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
SMB2_MAX_BUFFER_SIZE);
}
static bool
smb2_dir_needs_close(struct cifsFileInfo *cfile)
{
return !cfile->invalidHandle;
}
static void
fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
struct smb_rqst *old_rq)
{
struct smb2_sync_hdr *shdr =
(struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
tr_hdr->Flags = cpu_to_le16(0x01);
get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
}
/* We can not use the normal sg_set_buf() as we will sometimes pass a
* stack object as buf.
*/
static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
unsigned int buflen)
{
sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
}
/* Assumes:
* rqst->rq_iov[0] is rfc1002 length
* rqst->rq_iov[1] is tranform header
* rqst->rq_iov[2+] data to be encrypted/decrypted
*/
static struct scatterlist *
init_sg(struct smb_rqst *rqst, u8 *sign)
{
unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages;
unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
struct scatterlist *sg;
unsigned int i;
unsigned int j;
sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
if (!sg)
return NULL;
sg_init_table(sg, sg_len);
smb2_sg_set_buf(&sg[0], rqst->rq_iov[1].iov_base + 20, assoc_data_len);
for (i = 1; i < rqst->rq_nvec - 1; i++)
smb2_sg_set_buf(&sg[i], rqst->rq_iov[i+1].iov_base,
rqst->rq_iov[i+1].iov_len);
for (j = 0; i < sg_len - 1; i++, j++) {
unsigned int len, offset;
rqst_page_get_length(rqst, j, &len, &offset);
sg_set_page(&sg[i], rqst->rq_pages[j], len, offset);
}
smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
return sg;
}
static int
smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
{
struct cifs_ses *ses;
u8 *ses_enc_key;
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
if (ses->Suid != ses_id)
continue;
ses_enc_key = enc ? ses->smb3encryptionkey :
ses->smb3decryptionkey;
memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
spin_unlock(&cifs_tcp_ses_lock);
return 0;
}
spin_unlock(&cifs_tcp_ses_lock);
return 1;
}
/*
* Encrypt or decrypt @rqst message. @rqst has the following format:
* iov[0] - rfc1002 length
* iov[1] - transform header (associate data),
* iov[2-N] and pages - data to encrypt.
* On success return encrypted data in iov[2-N] and pages, leave iov[0-1]
* untouched.
*/
static int
crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
{
struct smb2_transform_hdr *tr_hdr =
(struct smb2_transform_hdr *)rqst->rq_iov[1].iov_base;
unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
int rc = 0;
struct scatterlist *sg;
u8 sign[SMB2_SIGNATURE_SIZE] = {};
u8 key[SMB3_SIGN_KEY_SIZE];
struct aead_request *req;
char *iv;
unsigned int iv_len;
DECLARE_CRYPTO_WAIT(wait);
struct crypto_aead *tfm;
unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
if (rc) {
cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
enc ? "en" : "de");
return 0;
}
rc = smb3_crypto_aead_allocate(server);
if (rc) {
cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
return rc;
}
tfm = enc ? server->secmech.ccmaesencrypt :
server->secmech.ccmaesdecrypt;
rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
if (rc) {
cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
return rc;
}
rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
if (rc) {
cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
return rc;
}
req = aead_request_alloc(tfm, GFP_KERNEL);
if (!req) {
cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
return -ENOMEM;
}
if (!enc) {
memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
crypt_len += SMB2_SIGNATURE_SIZE;
}
sg = init_sg(rqst, sign);
if (!sg) {
cifs_dbg(VFS, "%s: Failed to init sg", __func__);
rc = -ENOMEM;
goto free_req;
}
iv_len = crypto_aead_ivsize(tfm);
iv = kzalloc(iv_len, GFP_KERNEL);
if (!iv) {
cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
rc = -ENOMEM;
goto free_sg;
}
iv[0] = 3;
memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
aead_request_set_crypt(req, sg, sg, crypt_len, iv);
aead_request_set_ad(req, assoc_data_len);
aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
crypto_req_done, &wait);
rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
: crypto_aead_decrypt(req), &wait);
if (!rc && enc)
memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
kfree(iv);
free_sg:
kfree(sg);
free_req:
kfree(req);
return rc;
}
/*
* This is called from smb_send_rqst. At this point we have the rfc1002
* header as the first element in the vector.
*/
static int
smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
struct smb_rqst *old_rq)
{
struct kvec *iov;
struct page **pages;
struct smb2_transform_hdr *tr_hdr;
unsigned int npages = old_rq->rq_npages;
unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
int i;
int rc = -ENOMEM;
pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
if (!pages)
return rc;
new_rq->rq_pages = pages;
new_rq->rq_offset = old_rq->rq_offset;
new_rq->rq_npages = old_rq->rq_npages;
new_rq->rq_pagesz = old_rq->rq_pagesz;
new_rq->rq_tailsz = old_rq->rq_tailsz;
for (i = 0; i < npages; i++) {
pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
if (!pages[i])
goto err_free_pages;
}
/* Make space for one extra iov to hold the transform header */
iov = kmalloc_array(old_rq->rq_nvec + 1, sizeof(struct kvec),
GFP_KERNEL);
if (!iov)
goto err_free_pages;
/* copy all iovs from the old except the 1st one (rfc1002 length) */
memcpy(&iov[2], &old_rq->rq_iov[1],
sizeof(struct kvec) * (old_rq->rq_nvec - 1));
/* copy the rfc1002 iov */
iov[0].iov_base = old_rq->rq_iov[0].iov_base;
iov[0].iov_len = old_rq->rq_iov[0].iov_len;
new_rq->rq_iov = iov;
new_rq->rq_nvec = old_rq->rq_nvec + 1;
tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
if (!tr_hdr)
goto err_free_iov;
/* fill the 2nd iov with a transform header */
fill_transform_hdr(tr_hdr, orig_len, old_rq);
new_rq->rq_iov[1].iov_base = tr_hdr;
new_rq->rq_iov[1].iov_len = sizeof(struct smb2_transform_hdr);
/* Update rfc1002 header */
inc_rfc1001_len(new_rq->rq_iov[0].iov_base,
sizeof(struct smb2_transform_hdr));
/* copy pages form the old */
for (i = 0; i < npages; i++) {
char *dst, *src;
unsigned int offset, len;
rqst_page_get_length(new_rq, i, &len, &offset);
dst = (char *) kmap(new_rq->rq_pages[i]) + offset;
src = (char *) kmap(old_rq->rq_pages[i]) + offset;
memcpy(dst, src, len);
kunmap(new_rq->rq_pages[i]);
kunmap(old_rq->rq_pages[i]);
}
rc = crypt_message(server, new_rq, 1);
cifs_dbg(FYI, "encrypt message returned %d", rc);
if (rc)
goto err_free_tr_hdr;
return rc;
err_free_tr_hdr:
kfree(tr_hdr);
err_free_iov:
kfree(iov);
err_free_pages:
for (i = i - 1; i >= 0; i--)
put_page(pages[i]);
kfree(pages);
return rc;
}
static void
smb3_free_transform_rq(struct smb_rqst *rqst)
{
int i = rqst->rq_npages - 1;
for (; i >= 0; i--)
put_page(rqst->rq_pages[i]);
kfree(rqst->rq_pages);
/* free transform header */
kfree(rqst->rq_iov[1].iov_base);
kfree(rqst->rq_iov);
}
static int
smb3_is_transform_hdr(void *buf)
{
struct smb2_transform_hdr *trhdr = buf;
return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
}
static int
decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
unsigned int buf_data_size, struct page **pages,
unsigned int npages, unsigned int page_data_size)
{
struct kvec iov[3];
struct smb_rqst rqst = {NULL};
int rc;
iov[0].iov_base = NULL;
iov[0].iov_len = 0;
iov[1].iov_base = buf;
iov[1].iov_len = sizeof(struct smb2_transform_hdr);
iov[2].iov_base = buf + sizeof(struct smb2_transform_hdr);
iov[2].iov_len = buf_data_size;
rqst.rq_iov = iov;
rqst.rq_nvec = 3;
rqst.rq_pages = pages;
rqst.rq_npages = npages;
rqst.rq_pagesz = PAGE_SIZE;
rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
rc = crypt_message(server, &rqst, 0);
cifs_dbg(FYI, "decrypt message returned %d\n", rc);
if (rc)
return rc;
memmove(buf, iov[2].iov_base, buf_data_size);
server->total_read = buf_data_size + page_data_size;
return rc;
}
static int
read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
unsigned int npages, unsigned int len)
{
int i;
int length;
for (i = 0; i < npages; i++) {
struct page *page = pages[i];
size_t n;
n = len;
if (len >= PAGE_SIZE) {
/* enough data to fill the page */
n = PAGE_SIZE;
len -= n;
} else {
zero_user(page, len, PAGE_SIZE - len);
len = 0;
}
length = cifs_read_page_from_socket(server, page, 0, n);
if (length < 0)
return length;
server->total_read += length;
}
return 0;
}
static int
init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
unsigned int cur_off, struct bio_vec **page_vec)
{
struct bio_vec *bvec;
int i;
bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
if (!bvec)
return -ENOMEM;
for (i = 0; i < npages; i++) {
bvec[i].bv_page = pages[i];
bvec[i].bv_offset = (i == 0) ? cur_off : 0;
bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
data_size -= bvec[i].bv_len;
}
if (data_size != 0) {
cifs_dbg(VFS, "%s: something went wrong\n", __func__);
kfree(bvec);
return -EIO;
}
*page_vec = bvec;
return 0;
}
static int
handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
char *buf, unsigned int buf_len, struct page **pages,
unsigned int npages, unsigned int page_data_size)
{
unsigned int data_offset;
unsigned int data_len;
unsigned int cur_off;
unsigned int cur_page_idx;
unsigned int pad_len;
struct cifs_readdata *rdata = mid->callback_data;
struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
struct bio_vec *bvec = NULL;
struct iov_iter iter;
struct kvec iov;
int length;
bool use_rdma_mr = false;
if (shdr->Command != SMB2_READ) {
cifs_dbg(VFS, "only big read responses are supported\n");
return -ENOTSUPP;
}
if (server->ops->is_session_expired &&
server->ops->is_session_expired(buf)) {
cifs_reconnect(server);
wake_up(&server->response_q);
return -1;
}
if (server->ops->is_status_pending &&
server->ops->is_status_pending(buf, server, 0))
return -1;
rdata->result = server->ops->map_error(buf, false);
if (rdata->result != 0) {
cifs_dbg(FYI, "%s: server returned error %d\n",
__func__, rdata->result);
dequeue_mid(mid, rdata->result);
return 0;
}
data_offset = server->ops->read_data_offset(buf);
#ifdef CONFIG_CIFS_SMB_DIRECT
use_rdma_mr = rdata->mr;
#endif
data_len = server->ops->read_data_length(buf, use_rdma_mr);
if (data_offset < server->vals->read_rsp_size) {
/*
* win2k8 sometimes sends an offset of 0 when the read
* is beyond the EOF. Treat it as if the data starts just after
* the header.
*/
cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
__func__, data_offset);
data_offset = server->vals->read_rsp_size;
} else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
/* data_offset is beyond the end of smallbuf */
cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
__func__, data_offset);
rdata->result = -EIO;
dequeue_mid(mid, rdata->result);
return 0;
}
pad_len = data_offset - server->vals->read_rsp_size;
if (buf_len <= data_offset) {
/* read response payload is in pages */
cur_page_idx = pad_len / PAGE_SIZE;
cur_off = pad_len % PAGE_SIZE;
if (cur_page_idx != 0) {
/* data offset is beyond the 1st page of response */
cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
__func__, data_offset);
rdata->result = -EIO;
dequeue_mid(mid, rdata->result);
return 0;
}
if (data_len > page_data_size - pad_len) {
/* data_len is corrupt -- discard frame */
rdata->result = -EIO;
dequeue_mid(mid, rdata->result);
return 0;
}
rdata->result = init_read_bvec(pages, npages, page_data_size,
cur_off, &bvec);
if (rdata->result != 0) {
dequeue_mid(mid, rdata->result);
return 0;
}
iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
} else if (buf_len >= data_offset + data_len) {
/* read response payload is in buf */
WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
iov.iov_base = buf + data_offset;
iov.iov_len = data_len;
iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
} else {
/* read response payload cannot be in both buf and pages */
WARN_ONCE(1, "buf can not contain only a part of read data");
rdata->result = -EIO;
dequeue_mid(mid, rdata->result);
return 0;
}
/* set up first iov for signature check */
rdata->iov[0].iov_base = buf;
rdata->iov[0].iov_len = 4;
rdata->iov[1].iov_base = buf + 4;
rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
rdata->iov[0].iov_base, server->vals->read_rsp_size);
length = rdata->copy_into_pages(server, rdata, &iter);
kfree(bvec);
if (length < 0)
return length;
dequeue_mid(mid, false);
return length;
}
static int
receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
{
char *buf = server->smallbuf;
struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
unsigned int npages;
struct page **pages;
unsigned int len;
unsigned int buflen = server->pdu_size;
int rc;
int i = 0;
len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
if (rc < 0)
return rc;
server->total_read += rc;
len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
server->vals->read_rsp_size;
npages = DIV_ROUND_UP(len, PAGE_SIZE);
pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
if (!pages) {
rc = -ENOMEM;
goto discard_data;
}
for (; i < npages; i++) {
pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
if (!pages[i]) {
rc = -ENOMEM;
goto discard_data;
}
}
/* read read data into pages */
rc = read_data_into_pages(server, pages, npages, len);
if (rc)
goto free_pages;
rc = cifs_discard_remaining_data(server);
if (rc)
goto free_pages;
rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
pages, npages, len);
if (rc)
goto free_pages;
*mid = smb2_find_mid(server, buf);
if (*mid == NULL)
cifs_dbg(FYI, "mid not found\n");
else {
cifs_dbg(FYI, "mid found\n");
(*mid)->decrypted = true;
rc = handle_read_data(server, *mid, buf,
server->vals->read_rsp_size,
pages, npages, len);
}
free_pages:
for (i = i - 1; i >= 0; i--)
put_page(pages[i]);
kfree(pages);
return rc;
discard_data:
cifs_discard_remaining_data(server);
goto free_pages;
}
static int
receive_encrypted_standard(struct TCP_Server_Info *server,
struct mid_q_entry **mid)
{
int length;
char *buf = server->smallbuf;
unsigned int pdu_length = server->pdu_size;
unsigned int buf_size;
struct mid_q_entry *mid_entry;
/* switch to large buffer if too big for a small one */
if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
server->large_buf = true;
memcpy(server->bigbuf, buf, server->total_read);
buf = server->bigbuf;
}
/* now read the rest */
length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
pdu_length - HEADER_SIZE(server) + 1);
if (length < 0)
return length;
server->total_read += length;
buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
if (length)
return length;
mid_entry = smb2_find_mid(server, buf);
if (mid_entry == NULL)
cifs_dbg(FYI, "mid not found\n");
else {
cifs_dbg(FYI, "mid found\n");
mid_entry->decrypted = true;
}
*mid = mid_entry;
if (mid_entry && mid_entry->handle)
return mid_entry->handle(server, mid_entry);
return cifs_handle_standard(server, mid_entry);
}
static int
smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
{
char *buf = server->smallbuf;
unsigned int pdu_length = server->pdu_size;
struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
if (pdu_length < sizeof(struct smb2_transform_hdr) +
sizeof(struct smb2_sync_hdr)) {
cifs_dbg(VFS, "Transform message is too small (%u)\n",
pdu_length);
cifs_reconnect(server);
wake_up(&server->response_q);
return -ECONNABORTED;
}
if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
cifs_dbg(VFS, "Transform message is broken\n");
cifs_reconnect(server);
wake_up(&server->response_q);
return -ECONNABORTED;
}
if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
return receive_encrypted_read(server, mid);
return receive_encrypted_standard(server, mid);
}
int
smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
{
char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
return handle_read_data(server, mid, buf, server->pdu_size,
NULL, 0, 0);
}
static int
smb2_next_header(char *buf)
{
struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
return sizeof(struct smb2_transform_hdr) +
le32_to_cpu(t_hdr->OriginalMessageSize);
return le32_to_cpu(hdr->NextCommand);
}
struct smb_version_operations smb20_operations = {
.compare_fids = smb2_compare_fids,
.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,
.wait_mtu_credits = cifs_wait_mtu_credits,
.get_next_mid = smb2_get_next_mid,
.read_data_offset = smb2_read_data_offset,
.read_data_length = smb2_read_data_length,
.map_error = map_smb2_to_linux_error,
.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,
.is_oplock_break = smb2_is_valid_oplock_break,
.handle_cancelled_mid = smb2_handle_cancelled_mid,
cifs: Wait for writebacks to complete before attempting write. Problem reported in Red Hat bz 1040329 for strict writes where we cache only when we hold oplock and write direct to the server when we don't. When we receive an oplock break, we first change the oplock value for the inode in cifsInodeInfo->oplock to indicate that we no longer hold the oplock before we enqueue a task to flush changes to the backing device. Once we have completed flushing the changes, we return the oplock to the server. There are 2 ways here where we can have data corruption 1) While we flush changes to the backing device as part of the oplock break, we can have processes write to the file. These writes check for the oplock, find none and attempt to write directly to the server. These direct writes made while we are flushing from cache could be overwritten by data being flushed from the cache causing data corruption. 2) While a thread runs in cifs_strict_writev, the machine could receive and process an oplock break after the thread has checked the oplock and found that it allows us to cache and before we have made changes to the cache. In that case, we end up with a dirty page in cache when we shouldn't have any. This will be flushed later and will overwrite all subsequent writes to the part of the file represented by this page. Before making any writes to the server, we need to confirm that we are not in the process of flushing data to the server and if we are, we should wait until the process is complete before we attempt the write. We should also wait for existing writes to complete before we process an oplock break request which changes oplock values. We add a version specific downgrade_oplock() operation to allow for differences in the oplock values set for the different smb versions. Cc: stable@vger.kernel.org Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2014-03-11 16:11:47 +00:00
.downgrade_oplock = smb2_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb2_negotiate_wsize,
.negotiate_rsize = smb2_negotiate_rsize,
.sess_setup = SMB2_sess_setup,
.logoff = SMB2_logoff,
.tree_connect = SMB2_tcon,
.tree_disconnect = SMB2_tdis,
.qfs_tcon = smb2_qfs_tcon,
.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,
.set_path_size = smb2_set_path_size,
.set_file_size = smb2_set_file_size,
.set_file_info = smb2_set_file_info,
.set_compression = smb2_set_compression,
.mkdir = smb2_mkdir,
.mkdir_setinfo = smb2_mkdir_setinfo,
.rmdir = smb2_rmdir,
.unlink = smb2_unlink,
.rename = smb2_rename_path,
.create_hardlink = smb2_create_hardlink,
.query_symlink = smb2_query_symlink,
.query_mf_symlink = smb3_query_mf_symlink,
.create_mf_symlink = smb3_create_mf_symlink,
.open = smb2_open_file,
.set_fid = smb2_set_fid,
.close = smb2_close_file,
.flush = smb2_flush_file,
.async_readv = smb2_async_readv,
.async_writev = smb2_async_writev,
.sync_read = smb2_sync_read,
.sync_write = smb2_sync_write,
.query_dir_first = smb2_query_dir_first,
.query_dir_next = smb2_query_dir_next,
.close_dir = smb2_close_dir,
.calc_smb_size = smb2_calc_size,
.is_status_pending = smb2_is_status_pending,
.is_session_expired = smb2_is_session_expired,
.oplock_response = smb2_oplock_response,
.queryfs = smb2_queryfs,
.mand_lock = smb2_mand_lock,
.mand_unlock_range = smb2_unlock_range,
.push_mand_locks = smb2_push_mandatory_locks,
.get_lease_key = smb2_get_lease_key,
.set_lease_key = smb2_set_lease_key,
.new_lease_key = smb2_new_lease_key,
.calc_signature = smb2_calc_signature,
.is_read_op = smb2_is_read_op,
.set_oplock_level = smb2_set_oplock_level,
.create_lease_buf = smb2_create_lease_buf,
.parse_lease_buf = smb2_parse_lease_buf,
.copychunk_range = smb2_copychunk_range,
.wp_retry_size = smb2_wp_retry_size,
.dir_needs_close = smb2_dir_needs_close,
.get_dfs_refer = smb2_get_dfs_refer,
.select_sectype = smb2_select_sectype,
#ifdef CONFIG_CIFS_XATTR
.query_all_EAs = smb2_query_eas,
.set_EA = smb2_set_ea,
#endif /* CIFS_XATTR */
#ifdef CONFIG_CIFS_ACL
.get_acl = get_smb2_acl,
.get_acl_by_fid = get_smb2_acl_by_fid,
.set_acl = set_smb2_acl,
#endif /* CIFS_ACL */
.next_header = smb2_next_header,
};
struct smb_version_operations smb21_operations = {
.compare_fids = smb2_compare_fids,
.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,
.wait_mtu_credits = smb2_wait_mtu_credits,
.get_next_mid = smb2_get_next_mid,
.read_data_offset = smb2_read_data_offset,
.read_data_length = smb2_read_data_length,
.map_error = map_smb2_to_linux_error,
.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,
.is_oplock_break = smb2_is_valid_oplock_break,
.handle_cancelled_mid = smb2_handle_cancelled_mid,
cifs: Wait for writebacks to complete before attempting write. Problem reported in Red Hat bz 1040329 for strict writes where we cache only when we hold oplock and write direct to the server when we don't. When we receive an oplock break, we first change the oplock value for the inode in cifsInodeInfo->oplock to indicate that we no longer hold the oplock before we enqueue a task to flush changes to the backing device. Once we have completed flushing the changes, we return the oplock to the server. There are 2 ways here where we can have data corruption 1) While we flush changes to the backing device as part of the oplock break, we can have processes write to the file. These writes check for the oplock, find none and attempt to write directly to the server. These direct writes made while we are flushing from cache could be overwritten by data being flushed from the cache causing data corruption. 2) While a thread runs in cifs_strict_writev, the machine could receive and process an oplock break after the thread has checked the oplock and found that it allows us to cache and before we have made changes to the cache. In that case, we end up with a dirty page in cache when we shouldn't have any. This will be flushed later and will overwrite all subsequent writes to the part of the file represented by this page. Before making any writes to the server, we need to confirm that we are not in the process of flushing data to the server and if we are, we should wait until the process is complete before we attempt the write. We should also wait for existing writes to complete before we process an oplock break request which changes oplock values. We add a version specific downgrade_oplock() operation to allow for differences in the oplock values set for the different smb versions. Cc: stable@vger.kernel.org Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2014-03-11 16:11:47 +00:00
.downgrade_oplock = smb2_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb2_negotiate_wsize,
.negotiate_rsize = smb2_negotiate_rsize,
.sess_setup = SMB2_sess_setup,
.logoff = SMB2_logoff,
.tree_connect = SMB2_tcon,
.tree_disconnect = SMB2_tdis,
.qfs_tcon = smb2_qfs_tcon,
.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,
.set_path_size = smb2_set_path_size,
.set_file_size = smb2_set_file_size,
.set_file_info = smb2_set_file_info,
.set_compression = smb2_set_compression,
.mkdir = smb2_mkdir,
.mkdir_setinfo = smb2_mkdir_setinfo,
.rmdir = smb2_rmdir,
.unlink = smb2_unlink,
.rename = smb2_rename_path,
.create_hardlink = smb2_create_hardlink,
.query_symlink = smb2_query_symlink,
.query_mf_symlink = smb3_query_mf_symlink,
.create_mf_symlink = smb3_create_mf_symlink,
.open = smb2_open_file,
.set_fid = smb2_set_fid,
.close = smb2_close_file,
.flush = smb2_flush_file,
.async_readv = smb2_async_readv,
.async_writev = smb2_async_writev,
.sync_read = smb2_sync_read,
.sync_write = smb2_sync_write,
.query_dir_first = smb2_query_dir_first,
.query_dir_next = smb2_query_dir_next,
.close_dir = smb2_close_dir,
.calc_smb_size = smb2_calc_size,
.is_status_pending = smb2_is_status_pending,
.is_session_expired = smb2_is_session_expired,
.oplock_response = smb2_oplock_response,
.queryfs = smb2_queryfs,
.mand_lock = smb2_mand_lock,
.mand_unlock_range = smb2_unlock_range,
.push_mand_locks = smb2_push_mandatory_locks,
.get_lease_key = smb2_get_lease_key,
.set_lease_key = smb2_set_lease_key,
.new_lease_key = smb2_new_lease_key,
.calc_signature = smb2_calc_signature,
.is_read_op = smb21_is_read_op,
.set_oplock_level = smb21_set_oplock_level,
.create_lease_buf = smb2_create_lease_buf,
.parse_lease_buf = smb2_parse_lease_buf,
.copychunk_range = smb2_copychunk_range,
.wp_retry_size = smb2_wp_retry_size,
.dir_needs_close = smb2_dir_needs_close,
.enum_snapshots = smb3_enum_snapshots,
.get_dfs_refer = smb2_get_dfs_refer,
.select_sectype = smb2_select_sectype,
#ifdef CONFIG_CIFS_XATTR
.query_all_EAs = smb2_query_eas,
.set_EA = smb2_set_ea,
#endif /* CIFS_XATTR */
#ifdef CONFIG_CIFS_ACL
.get_acl = get_smb2_acl,
.get_acl_by_fid = get_smb2_acl_by_fid,
.set_acl = set_smb2_acl,
#endif /* CIFS_ACL */
.next_header = smb2_next_header,
};
struct smb_version_operations smb30_operations = {
.compare_fids = smb2_compare_fids,
.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,
.wait_mtu_credits = smb2_wait_mtu_credits,
.get_next_mid = smb2_get_next_mid,
.read_data_offset = smb2_read_data_offset,
.read_data_length = smb2_read_data_length,
.map_error = map_smb2_to_linux_error,
.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,
.dump_share_caps = smb2_dump_share_caps,
.is_oplock_break = smb2_is_valid_oplock_break,
.handle_cancelled_mid = smb2_handle_cancelled_mid,
cifs: Wait for writebacks to complete before attempting write. Problem reported in Red Hat bz 1040329 for strict writes where we cache only when we hold oplock and write direct to the server when we don't. When we receive an oplock break, we first change the oplock value for the inode in cifsInodeInfo->oplock to indicate that we no longer hold the oplock before we enqueue a task to flush changes to the backing device. Once we have completed flushing the changes, we return the oplock to the server. There are 2 ways here where we can have data corruption 1) While we flush changes to the backing device as part of the oplock break, we can have processes write to the file. These writes check for the oplock, find none and attempt to write directly to the server. These direct writes made while we are flushing from cache could be overwritten by data being flushed from the cache causing data corruption. 2) While a thread runs in cifs_strict_writev, the machine could receive and process an oplock break after the thread has checked the oplock and found that it allows us to cache and before we have made changes to the cache. In that case, we end up with a dirty page in cache when we shouldn't have any. This will be flushed later and will overwrite all subsequent writes to the part of the file represented by this page. Before making any writes to the server, we need to confirm that we are not in the process of flushing data to the server and if we are, we should wait until the process is complete before we attempt the write. We should also wait for existing writes to complete before we process an oplock break request which changes oplock values. We add a version specific downgrade_oplock() operation to allow for differences in the oplock values set for the different smb versions. Cc: stable@vger.kernel.org Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2014-03-11 16:11:47 +00:00
.downgrade_oplock = smb2_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb2_negotiate_wsize,
.negotiate_rsize = smb2_negotiate_rsize,
.sess_setup = SMB2_sess_setup,
.logoff = SMB2_logoff,
.tree_connect = SMB2_tcon,
.tree_disconnect = SMB2_tdis,
.qfs_tcon = smb3_qfs_tcon,
.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,
.set_path_size = smb2_set_path_size,
.set_file_size = smb2_set_file_size,
.set_file_info = smb2_set_file_info,
.set_compression = smb2_set_compression,
.mkdir = smb2_mkdir,
.mkdir_setinfo = smb2_mkdir_setinfo,
.rmdir = smb2_rmdir,
.unlink = smb2_unlink,
.rename = smb2_rename_path,
.create_hardlink = smb2_create_hardlink,
.query_symlink = smb2_query_symlink,
.query_mf_symlink = smb3_query_mf_symlink,
.create_mf_symlink = smb3_create_mf_symlink,
.open = smb2_open_file,
.set_fid = smb2_set_fid,
.close = smb2_close_file,
.flush = smb2_flush_file,
.async_readv = smb2_async_readv,
.async_writev = smb2_async_writev,
.sync_read = smb2_sync_read,
.sync_write = smb2_sync_write,
.query_dir_first = smb2_query_dir_first,
.query_dir_next = smb2_query_dir_next,
.close_dir = smb2_close_dir,
.calc_smb_size = smb2_calc_size,
.is_status_pending = smb2_is_status_pending,
.is_session_expired = smb2_is_session_expired,
.oplock_response = smb2_oplock_response,
.queryfs = smb2_queryfs,
.mand_lock = smb2_mand_lock,
.mand_unlock_range = smb2_unlock_range,
.push_mand_locks = smb2_push_mandatory_locks,
.get_lease_key = smb2_get_lease_key,
.set_lease_key = smb2_set_lease_key,
.new_lease_key = smb2_new_lease_key,
.generate_signingkey = generate_smb30signingkey,
.calc_signature = smb3_calc_signature,
.set_integrity = smb3_set_integrity,
.is_read_op = smb21_is_read_op,
.set_oplock_level = smb3_set_oplock_level,
.create_lease_buf = smb3_create_lease_buf,
.parse_lease_buf = smb3_parse_lease_buf,
.copychunk_range = smb2_copychunk_range,
.duplicate_extents = smb2_duplicate_extents,
.validate_negotiate = smb3_validate_negotiate,
.wp_retry_size = smb2_wp_retry_size,
.dir_needs_close = smb2_dir_needs_close,
.fallocate = smb3_fallocate,
.enum_snapshots = smb3_enum_snapshots,
.init_transform_rq = smb3_init_transform_rq,
.free_transform_rq = smb3_free_transform_rq,
.is_transform_hdr = smb3_is_transform_hdr,
.receive_transform = smb3_receive_transform,
.get_dfs_refer = smb2_get_dfs_refer,
.select_sectype = smb2_select_sectype,
#ifdef CONFIG_CIFS_XATTR
.query_all_EAs = smb2_query_eas,
.set_EA = smb2_set_ea,
#endif /* CIFS_XATTR */
#ifdef CONFIG_CIFS_ACL
.get_acl = get_smb2_acl,
.get_acl_by_fid = get_smb2_acl_by_fid,
.set_acl = set_smb2_acl,
#endif /* CIFS_ACL */
.next_header = smb2_next_header,
};
#ifdef CONFIG_CIFS_SMB311
struct smb_version_operations smb311_operations = {
.compare_fids = smb2_compare_fids,
.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,
.wait_mtu_credits = smb2_wait_mtu_credits,
.get_next_mid = smb2_get_next_mid,
.read_data_offset = smb2_read_data_offset,
.read_data_length = smb2_read_data_length,
.map_error = map_smb2_to_linux_error,
.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,
.dump_share_caps = smb2_dump_share_caps,
.is_oplock_break = smb2_is_valid_oplock_break,
.handle_cancelled_mid = smb2_handle_cancelled_mid,
.downgrade_oplock = smb2_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb2_negotiate_wsize,
.negotiate_rsize = smb2_negotiate_rsize,
.sess_setup = SMB2_sess_setup,
.logoff = SMB2_logoff,
.tree_connect = SMB2_tcon,
.tree_disconnect = SMB2_tdis,
.qfs_tcon = smb3_qfs_tcon,
.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,
.set_path_size = smb2_set_path_size,
.set_file_size = smb2_set_file_size,
.set_file_info = smb2_set_file_info,
.set_compression = smb2_set_compression,
.mkdir = smb2_mkdir,
.mkdir_setinfo = smb2_mkdir_setinfo,
.rmdir = smb2_rmdir,
.unlink = smb2_unlink,
.rename = smb2_rename_path,
.create_hardlink = smb2_create_hardlink,
.query_symlink = smb2_query_symlink,
.query_mf_symlink = smb3_query_mf_symlink,
.create_mf_symlink = smb3_create_mf_symlink,
.open = smb2_open_file,
.set_fid = smb2_set_fid,
.close = smb2_close_file,
.flush = smb2_flush_file,
.async_readv = smb2_async_readv,
.async_writev = smb2_async_writev,
.sync_read = smb2_sync_read,
.sync_write = smb2_sync_write,
.query_dir_first = smb2_query_dir_first,
.query_dir_next = smb2_query_dir_next,
.close_dir = smb2_close_dir,
.calc_smb_size = smb2_calc_size,
.is_status_pending = smb2_is_status_pending,
.is_session_expired = smb2_is_session_expired,
.oplock_response = smb2_oplock_response,
.queryfs = smb2_queryfs,
.mand_lock = smb2_mand_lock,
.mand_unlock_range = smb2_unlock_range,
.push_mand_locks = smb2_push_mandatory_locks,
.get_lease_key = smb2_get_lease_key,
.set_lease_key = smb2_set_lease_key,
.new_lease_key = smb2_new_lease_key,
.generate_signingkey = generate_smb311signingkey,
.calc_signature = smb3_calc_signature,
.set_integrity = smb3_set_integrity,
.is_read_op = smb21_is_read_op,
.set_oplock_level = smb3_set_oplock_level,
.create_lease_buf = smb3_create_lease_buf,
.parse_lease_buf = smb3_parse_lease_buf,
.copychunk_range = smb2_copychunk_range,
.duplicate_extents = smb2_duplicate_extents,
/* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
.wp_retry_size = smb2_wp_retry_size,
.dir_needs_close = smb2_dir_needs_close,
.fallocate = smb3_fallocate,
.enum_snapshots = smb3_enum_snapshots,
.init_transform_rq = smb3_init_transform_rq,
.free_transform_rq = smb3_free_transform_rq,
.is_transform_hdr = smb3_is_transform_hdr,
.receive_transform = smb3_receive_transform,
.get_dfs_refer = smb2_get_dfs_refer,
.select_sectype = smb2_select_sectype,
#ifdef CONFIG_CIFS_XATTR
.query_all_EAs = smb2_query_eas,
.set_EA = smb2_set_ea,
#endif /* CIFS_XATTR */
.next_header = smb2_next_header,
};
#endif /* CIFS_SMB311 */
struct smb_version_values smb20_values = {
.version_string = SMB20_VERSION_STRING,
.protocol_id = SMB20_PROT_ID,
.req_capabilities = 0, /* MBZ */
.large_lock_type = 0,
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_sync_hdr),
.header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
.cap_unix = 0,
.cap_nt_find = SMB2_NT_FIND,
.cap_large_files = SMB2_LARGE_FILES,
.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
.create_lease_size = sizeof(struct create_lease),
};
struct smb_version_values smb21_values = {
.version_string = SMB21_VERSION_STRING,
.protocol_id = SMB21_PROT_ID,
.req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
.large_lock_type = 0,
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_sync_hdr),
.header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
.cap_unix = 0,
.cap_nt_find = SMB2_NT_FIND,
.cap_large_files = SMB2_LARGE_FILES,
.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
.create_lease_size = sizeof(struct create_lease),
};
struct smb_version_values smb3any_values = {
.version_string = SMB3ANY_VERSION_STRING,
.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
.large_lock_type = 0,
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_sync_hdr),
.header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
.cap_unix = 0,
.cap_nt_find = SMB2_NT_FIND,
.cap_large_files = SMB2_LARGE_FILES,
.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
.create_lease_size = sizeof(struct create_lease_v2),
};
struct smb_version_values smbdefault_values = {
.version_string = SMBDEFAULT_VERSION_STRING,
.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
.large_lock_type = 0,
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_sync_hdr),
.header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
.cap_unix = 0,
.cap_nt_find = SMB2_NT_FIND,
.cap_large_files = SMB2_LARGE_FILES,
.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
.create_lease_size = sizeof(struct create_lease_v2),
};
struct smb_version_values smb30_values = {
.version_string = SMB30_VERSION_STRING,
.protocol_id = SMB30_PROT_ID,
.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
.large_lock_type = 0,
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_sync_hdr),
.header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
.cap_unix = 0,
.cap_nt_find = SMB2_NT_FIND,
.cap_large_files = SMB2_LARGE_FILES,
.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
.create_lease_size = sizeof(struct create_lease_v2),
};
struct smb_version_values smb302_values = {
.version_string = SMB302_VERSION_STRING,
.protocol_id = SMB302_PROT_ID,
.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
.large_lock_type = 0,
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_sync_hdr),
.header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
.cap_unix = 0,
.cap_nt_find = SMB2_NT_FIND,
.cap_large_files = SMB2_LARGE_FILES,
.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
.create_lease_size = sizeof(struct create_lease_v2),
};
#ifdef CONFIG_CIFS_SMB311
struct smb_version_values smb311_values = {
.version_string = SMB311_VERSION_STRING,
.protocol_id = SMB311_PROT_ID,
.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
.large_lock_type = 0,
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_sync_hdr),
.header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
.cap_unix = 0,
.cap_nt_find = SMB2_NT_FIND,
.cap_large_files = SMB2_LARGE_FILES,
.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
.create_lease_size = sizeof(struct create_lease_v2),
};
#endif /* SMB311 */