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linux/fs/cifs/smb2ops.c
Paulo Alcantara c88f7dcd6d cifs: support nested dfs links over reconnect 
Mounting a dfs link that has nested links was already supported at
mount(2), so make it work over reconnect as well.

Make the following case work:

* mount //root/dfs/link /mnt -o ...
  - final share: /server/share

* in server settings
  - change target folder of /root/dfs/link3 to /server/share2
  - change target folder of /root/dfs/link2 to /root/dfs/link3
  - change target folder of /root/dfs/link to /root/dfs/link2

* mount -o remount,... /mnt
 - refresh all dfs referrals
 - mark current connection for failover
 - cifs_reconnect() reconnects to root server
 - tree_connect()
   * checks that /root/dfs/link2 is a link, then chase it
   * checks that root/dfs/link3 is a link, then chase it
   * finally tree connect to /server/share2

If the mounted share is no longer accessible and a reconnect had been
triggered, the client will retry it from both last referral
path (/root/dfs/link3) and original referral path (/root/dfs/link).

Any new referral paths found while chasing dfs links over reconnect,
it will be updated to TCP_Server_Info::leaf_fullpath, accordingly.

Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-10 16:30:13 -06:00

5934 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* SMB2 version specific operations
*
* Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
*/
#include <linux/pagemap.h>
#include <linux/vfs.h>
#include <linux/falloc.h>
#include <linux/scatterlist.h>
#include <linux/uuid.h>
#include <linux/sort.h>
#include <crypto/aead.h>
#include <linux/fiemap.h>
#include "cifsfs.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"
#include "fs_context.h"
/* Change credits for different ops and return the total number of credits */
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 0;
case 1:
server->echoes = false;
server->oplocks = false;
break;
case 2:
server->echoes = true;
server->oplocks = false;
server->echo_credits = 1;
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 server->credits + server->echo_credits + server->oplock_credits;
}
static void
smb2_add_credits(struct TCP_Server_Info *server,
const struct cifs_credits *credits, const int optype)
{
int *val, rc = -1;
int scredits, in_flight;
unsigned int add = credits->value;
unsigned int instance = credits->instance;
bool reconnect_detected = false;
bool reconnect_with_invalid_credits = false;
spin_lock(&server->req_lock);
val = server->ops->get_credits_field(server, optype);
/* eg found case where write overlapping reconnect messed up credits */
if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
reconnect_with_invalid_credits = true;
if ((instance == 0) || (instance == server->reconnect_instance))
*val += add;
else
reconnect_detected = true;
if (*val > 65000) {
*val = 65000; /* Don't get near 64K credits, avoid srv bugs */
pr_warn_once("server overflowed SMB3 credits\n");
}
server->in_flight--;
if (server->in_flight == 0 &&
((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
((optype & CIFS_OP_MASK) != CIFS_SESS_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++;
}
}
scredits = *val;
in_flight = server->in_flight;
spin_unlock(&server->req_lock);
wake_up(&server->request_q);
if (reconnect_detected) {
trace_smb3_reconnect_detected(server->CurrentMid,
server->conn_id, server->hostname, scredits, add, in_flight);
cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
add, instance);
}
if (reconnect_with_invalid_credits) {
trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
server->conn_id, server->hostname, scredits, add, in_flight);
cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
optype, scredits, add);
}
if (server->tcpStatus == CifsNeedReconnect
|| server->tcpStatus == CifsExiting)
return;
switch (rc) {
case -1:
/* change_conf hasn't been executed */
break;
case 0:
cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
break;
case 1:
cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
break;
case 2:
cifs_dbg(FYI, "disabling oplocks\n");
break;
default:
/* change_conf rebalanced credits for different types */
break;
}
trace_smb3_add_credits(server->CurrentMid,
server->conn_id, server->hostname, scredits, add, in_flight);
cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
}
static void
smb2_set_credits(struct TCP_Server_Info *server, const int val)
{
int scredits, in_flight;
spin_lock(&server->req_lock);
server->credits = val;
if (val == 1)
server->reconnect_instance++;
scredits = server->credits;
in_flight = server->in_flight;
spin_unlock(&server->req_lock);
trace_smb3_set_credits(server->CurrentMid,
server->conn_id, server->hostname, scredits, val, in_flight);
cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
/* don't log while holding the lock */
if (val == 1)
cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
}
static int *
smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
{
switch (optype) {
case CIFS_ECHO_OP:
return &server->echo_credits;
case CIFS_OBREAK_OP:
return &server->oplock_credits;
default:
return &server->credits;
}
}
static unsigned int
smb2_get_credits(struct mid_q_entry *mid)
{
return mid->credits_received;
}
static int
smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
unsigned int *num, struct cifs_credits *credits)
{
int rc = 0;
unsigned int scredits, in_flight;
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, 1));
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 <= 8) {
*num = SMB2_MAX_BUFFER_SIZE;
credits->value = 0;
credits->instance = 0;
break;
}
/* leave some credits for reopen and other ops */
scredits -= 8;
*num = min_t(unsigned int, size,
scredits * SMB2_MAX_BUFFER_SIZE);
credits->value =
DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
credits->instance = server->reconnect_instance;
server->credits -= credits->value;
server->in_flight++;
if (server->in_flight > server->max_in_flight)
server->max_in_flight = server->in_flight;
break;
}
}
scredits = server->credits;
in_flight = server->in_flight;
spin_unlock(&server->req_lock);
trace_smb3_add_credits(server->CurrentMid,
server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
__func__, credits->value, scredits);
return rc;
}
static int
smb2_adjust_credits(struct TCP_Server_Info *server,
struct cifs_credits *credits,
const unsigned int payload_size)
{
int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
int scredits, in_flight;
if (!credits->value || credits->value == new_val)
return 0;
if (credits->value < new_val) {
trace_smb3_too_many_credits(server->CurrentMid,
server->conn_id, server->hostname, 0, credits->value - new_val, 0);
cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
credits->value, new_val);
return -ENOTSUPP;
}
spin_lock(&server->req_lock);
if (server->reconnect_instance != credits->instance) {
scredits = server->credits;
in_flight = server->in_flight;
spin_unlock(&server->req_lock);
trace_smb3_reconnect_detected(server->CurrentMid,
server->conn_id, server->hostname, scredits,
credits->value - new_val, in_flight);
cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
credits->value - new_val);
return -EAGAIN;
}
server->credits += credits->value - new_val;
scredits = server->credits;
in_flight = server->in_flight;
spin_unlock(&server->req_lock);
wake_up(&server->request_q);
trace_smb3_add_credits(server->CurrentMid,
server->conn_id, server->hostname, scredits,
credits->value - new_val, in_flight);
cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
__func__, credits->value - new_val, scredits);
credits->value = new_val;
return 0;
}
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 void
smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
{
spin_lock(&GlobalMid_Lock);
if (server->CurrentMid >= val)
server->CurrentMid -= val;
spin_unlock(&GlobalMid_Lock);
}
static struct mid_q_entry *
__smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
{
struct mid_q_entry *mid;
struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
__u64 wire_mid = le64_to_cpu(shdr->MessageId);
if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
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)) {
kref_get(&mid->refcount);
if (dequeue) {
list_del_init(&mid->qhead);
mid->mid_flags |= MID_DELETED;
}
spin_unlock(&GlobalMid_Lock);
return mid;
}
}
spin_unlock(&GlobalMid_Lock);
return NULL;
}
static struct mid_q_entry *
smb2_find_mid(struct TCP_Server_Info *server, char *buf)
{
return __smb2_find_mid(server, buf, false);
}
static struct mid_q_entry *
smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
{
return __smb2_find_mid(server, buf, true);
}
static void
smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
{
#ifdef CONFIG_CIFS_DEBUG2
struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
shdr->Id.SyncId.ProcessId);
cifs_server_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;
spin_lock(&GlobalMid_Lock);
cifs_ses_server(ses)->CurrentMid = 0;
spin_unlock(&GlobalMid_Lock);
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 smb3_fs_context *ctx)
{
struct TCP_Server_Info *server = tcon->ses->server;
unsigned int wsize;
/* start with specified wsize, or default */
wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
wsize = min_t(unsigned int, wsize, server->max_write);
if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
return wsize;
}
static unsigned int
smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
{
struct TCP_Server_Info *server = tcon->ses->server;
unsigned int wsize;
/* start with specified wsize, or default */
wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
wsize = min_t(unsigned int, wsize, server->max_write);
#ifdef CONFIG_CIFS_SMB_DIRECT
if (server->rdma) {
if (server->sign)
/*
* Account for SMB2 data transfer packet header and
* possible encryption header
*/
wsize = min_t(unsigned int,
wsize,
server->smbd_conn->max_fragmented_send_size -
SMB2_READWRITE_PDU_HEADER_SIZE -
sizeof(struct smb2_transform_hdr));
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 smb3_fs_context *ctx)
{
struct TCP_Server_Info *server = tcon->ses->server;
unsigned int rsize;
/* start with specified rsize, or default */
rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
rsize = min_t(unsigned int, rsize, server->max_read);
if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
return rsize;
}
static unsigned int
smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
{
struct TCP_Server_Info *server = tcon->ses->server;
unsigned int rsize;
/* start with specified rsize, or default */
rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
rsize = min_t(unsigned int, rsize, server->max_read);
#ifdef CONFIG_CIFS_SMB_DIRECT
if (server->rdma) {
if (server->sign)
/*
* Account for SMB2 data transfer packet header and
* possible encryption header
*/
rsize = min_t(unsigned int,
rsize,
server->smbd_conn->max_fragmented_recv_size -
SMB2_READWRITE_PDU_HEADER_SIZE -
sizeof(struct smb2_transform_hdr));
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;
}
static int
parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
size_t buf_len,
struct cifs_server_iface **iface_list,
size_t *iface_count)
{
struct network_interface_info_ioctl_rsp *p;
struct sockaddr_in *addr4;
struct sockaddr_in6 *addr6;
struct iface_info_ipv4 *p4;
struct iface_info_ipv6 *p6;
struct cifs_server_iface *info;
ssize_t bytes_left;
size_t next = 0;
int nb_iface = 0;
int rc = 0;
*iface_list = NULL;
*iface_count = 0;
/*
* Fist pass: count and sanity check
*/
bytes_left = buf_len;
p = buf;
while (bytes_left >= sizeof(*p)) {
nb_iface++;
next = le32_to_cpu(p->Next);
if (!next) {
bytes_left -= sizeof(*p);
break;
}
p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
bytes_left -= next;
}
if (!nb_iface) {
cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
rc = -EINVAL;
goto out;
}
/* Azure rounds the buffer size up 8, to a 16 byte boundary */
if ((bytes_left > 8) || p->Next)
cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
/*
* Second pass: extract info to internal structure
*/
*iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
if (!*iface_list) {
rc = -ENOMEM;
goto out;
}
info = *iface_list;
bytes_left = buf_len;
p = buf;
while (bytes_left >= sizeof(*p)) {
info->speed = le64_to_cpu(p->LinkSpeed);
info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
le32_to_cpu(p->Capability));
switch (p->Family) {
/*
* The kernel and wire socket structures have the same
* layout and use network byte order but make the
* conversion explicit in case either one changes.
*/
case INTERNETWORK:
addr4 = (struct sockaddr_in *)&info->sockaddr;
p4 = (struct iface_info_ipv4 *)p->Buffer;
addr4->sin_family = AF_INET;
memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
/* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
addr4->sin_port = cpu_to_be16(CIFS_PORT);
cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
&addr4->sin_addr);
break;
case INTERNETWORKV6:
addr6 = (struct sockaddr_in6 *)&info->sockaddr;
p6 = (struct iface_info_ipv6 *)p->Buffer;
addr6->sin6_family = AF_INET6;
memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
/* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
addr6->sin6_flowinfo = 0;
addr6->sin6_scope_id = 0;
addr6->sin6_port = cpu_to_be16(CIFS_PORT);
cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
&addr6->sin6_addr);
break;
default:
cifs_dbg(VFS,
"%s: skipping unsupported socket family\n",
__func__);
goto next_iface;
}
(*iface_count)++;
info++;
next_iface:
next = le32_to_cpu(p->Next);
if (!next)
break;
p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
bytes_left -= next;
}
if (!*iface_count) {
rc = -EINVAL;
goto out;
}
out:
if (rc) {
kfree(*iface_list);
*iface_count = 0;
*iface_list = NULL;
}
return rc;
}
static int compare_iface(const void *ia, const void *ib)
{
const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
}
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 = NULL;
struct cifs_server_iface *iface_list;
size_t iface_count;
struct cifs_ses *ses = tcon->ses;
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 */,
CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
if (rc == -EOPNOTSUPP) {
cifs_dbg(FYI,
"server does not support query network interfaces\n");
goto out;
} else if (rc != 0) {
cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
goto out;
}
rc = parse_server_interfaces(out_buf, ret_data_len,
&iface_list, &iface_count);
if (rc)
goto out;
/* sort interfaces from fastest to slowest */
sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
spin_lock(&ses->iface_lock);
kfree(ses->iface_list);
ses->iface_list = iface_list;
ses->iface_count = iface_count;
ses->iface_last_update = jiffies;
spin_unlock(&ses->iface_lock);
out:
kfree(out_buf);
return rc;
}
static void
smb2_close_cached_fid(struct kref *ref)
{
struct cached_fid *cfid = container_of(ref, struct cached_fid,
refcount);
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);
}
/*
* We only check validity above to send SMB2_close,
* but we still need to invalidate these entries
* when this function is called
*/
cfid->is_valid = false;
cfid->file_all_info_is_valid = false;
cfid->has_lease = false;
if (cfid->dentry) {
dput(cfid->dentry);
cfid->dentry = NULL;
}
}
void close_cached_dir(struct cached_fid *cfid)
{
mutex_lock(&cfid->fid_mutex);
kref_put(&cfid->refcount, smb2_close_cached_fid);
mutex_unlock(&cfid->fid_mutex);
}
void close_cached_dir_lease_locked(struct cached_fid *cfid)
{
if (cfid->has_lease) {
cfid->has_lease = false;
kref_put(&cfid->refcount, smb2_close_cached_fid);
}
}
void close_cached_dir_lease(struct cached_fid *cfid)
{
mutex_lock(&cfid->fid_mutex);
close_cached_dir_lease_locked(cfid);
mutex_unlock(&cfid->fid_mutex);
}
void
smb2_cached_lease_break(struct work_struct *work)
{
struct cached_fid *cfid = container_of(work,
struct cached_fid, lease_break);
close_cached_dir_lease(cfid);
}
/*
* Open the and cache a directory handle.
* Only supported for the root handle.
*/
int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
const char *path,
struct cifs_sb_info *cifs_sb,
struct cached_fid **cfid)
{
struct cifs_ses *ses = tcon->ses;
struct TCP_Server_Info *server = ses->server;
struct cifs_open_parms oparms;
struct smb2_create_rsp *o_rsp = NULL;
struct smb2_query_info_rsp *qi_rsp = NULL;
int resp_buftype[2];
struct smb_rqst rqst[2];
struct kvec rsp_iov[2];
struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
struct kvec qi_iov[1];
int rc, flags = 0;
__le16 utf16_path = 0; /* Null - since an open of top of share */
u8 oplock = SMB2_OPLOCK_LEVEL_II;
struct cifs_fid *pfid;
struct dentry *dentry;
if (tcon->nohandlecache)
return -ENOTSUPP;
if (cifs_sb->root == NULL)
return -ENOENT;
if (strlen(path))
return -ENOENT;
dentry = cifs_sb->root;
mutex_lock(&tcon->crfid.fid_mutex);
if (tcon->crfid.is_valid) {
cifs_dbg(FYI, "found a cached root file handle\n");
*cfid = &tcon->crfid;
kref_get(&tcon->crfid.refcount);
mutex_unlock(&tcon->crfid.fid_mutex);
return 0;
}
/*
* We do not hold the lock for the open because in case
* SMB2_open needs to reconnect, it will end up calling
* cifs_mark_open_files_invalid() which takes the lock again
* thus causing a deadlock
*/
mutex_unlock(&tcon->crfid.fid_mutex);
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
if (!server->ops->new_lease_key)
return -EIO;
pfid = tcon->crfid.fid;
server->ops->new_lease_key(pfid);
memset(rqst, 0, sizeof(rqst));
resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
memset(rsp_iov, 0, sizeof(rsp_iov));
/* Open */
memset(&open_iov, 0, sizeof(open_iov));
rqst[0].rq_iov = open_iov;
rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
oparms.tcon = tcon;
oparms.create_options = cifs_create_options(cifs_sb, 0);
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.fid = pfid;
oparms.reconnect = false;
rc = SMB2_open_init(tcon, server,
&rqst[0], &oplock, &oparms, &utf16_path);
if (rc)
goto oshr_free;
smb2_set_next_command(tcon, &rqst[0]);
memset(&qi_iov, 0, sizeof(qi_iov));
rqst[1].rq_iov = qi_iov;
rqst[1].rq_nvec = 1;
rc = SMB2_query_info_init(tcon, server,
&rqst[1], COMPOUND_FID,
COMPOUND_FID, FILE_ALL_INFORMATION,
SMB2_O_INFO_FILE, 0,
sizeof(struct smb2_file_all_info) +
PATH_MAX * 2, 0, NULL);
if (rc)
goto oshr_free;
smb2_set_related(&rqst[1]);
rc = compound_send_recv(xid, ses, server,
flags, 2, rqst,
resp_buftype, rsp_iov);
mutex_lock(&tcon->crfid.fid_mutex);
/*
* Now we need to check again as the cached root might have
* been successfully re-opened from a concurrent process
*/
if (tcon->crfid.is_valid) {
/* work was already done */
/* stash fids for close() later */
struct cifs_fid fid = {
.persistent_fid = pfid->persistent_fid,
.volatile_fid = pfid->volatile_fid,
};
/*
* caller expects this func to set the fid in crfid to valid
* cached root, so increment the refcount.
*/
kref_get(&tcon->crfid.refcount);
mutex_unlock(&tcon->crfid.fid_mutex);
if (rc == 0) {
/* close extra handle outside of crit sec */
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
}
rc = 0;
goto oshr_free;
}
/* Cached root is still invalid, continue normaly */
if (rc) {
if (rc == -EREMCHG) {
tcon->need_reconnect = true;
pr_warn_once("server share %s deleted\n",
tcon->treeName);
}
goto oshr_exit;
}
atomic_inc(&tcon->num_remote_opens);
o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
oparms.fid->persistent_fid = le64_to_cpu(o_rsp->PersistentFileId);
oparms.fid->volatile_fid = le64_to_cpu(o_rsp->VolatileFileId);
#ifdef CONFIG_CIFS_DEBUG2
oparms.fid->mid = le64_to_cpu(o_rsp->hdr.MessageId);
#endif /* CIFS_DEBUG2 */
tcon->crfid.tcon = tcon;
tcon->crfid.is_valid = true;
tcon->crfid.dentry = dentry;
dget(dentry);
kref_init(&tcon->crfid.refcount);
/* BB TBD check to see if oplock level check can be removed below */
if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
/*
* See commit 2f94a3125b87. Increment the refcount when we
* get a lease for root, release it if lease break occurs
*/
kref_get(&tcon->crfid.refcount);
tcon->crfid.has_lease = true;
smb2_parse_contexts(server, o_rsp,
&oparms.fid->epoch,
oparms.fid->lease_key, &oplock,
NULL, NULL);
} else
goto oshr_exit;
qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
goto oshr_exit;
if (!smb2_validate_and_copy_iov(
le16_to_cpu(qi_rsp->OutputBufferOffset),
sizeof(struct smb2_file_all_info),
&rsp_iov[1], sizeof(struct smb2_file_all_info),
(char *)&tcon->crfid.file_all_info))
tcon->crfid.file_all_info_is_valid = true;
tcon->crfid.time = jiffies;
oshr_exit:
mutex_unlock(&tcon->crfid.fid_mutex);
oshr_free:
SMB2_open_free(&rqst[0]);
SMB2_query_info_free(&rqst[1]);
free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
if (rc == 0)
*cfid = &tcon->crfid;
return rc;
}
int open_cached_dir_by_dentry(struct cifs_tcon *tcon,
struct dentry *dentry,
struct cached_fid **cfid)
{
mutex_lock(&tcon->crfid.fid_mutex);
if (tcon->crfid.dentry == dentry) {
cifs_dbg(FYI, "found a cached root file handle by dentry\n");
*cfid = &tcon->crfid;
kref_get(&tcon->crfid.refcount);
mutex_unlock(&tcon->crfid.fid_mutex);
return 0;
}
mutex_unlock(&tcon->crfid.fid_mutex);
return -ENOENT;
}
static void
smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb)
{
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;
struct cached_fid *cfid = NULL;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = cifs_create_options(cifs_sb, 0);
oparms.fid = &fid;
oparms.reconnect = false;
rc = open_cached_dir(xid, tcon, "", cifs_sb, &cfid);
if (rc == 0)
memcpy(&fid, cfid->fid, sizeof(struct cifs_fid));
else
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
NULL, NULL);
if (rc)
return;
SMB3_request_interfaces(xid, tcon);
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_VOLUME_INFORMATION);
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
if (cfid == NULL)
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
else
close_cached_dir(cfid);
}
static void
smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb)
{
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 = cifs_create_options(cifs_sb, 0);
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, 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);
}
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 = cifs_create_options(cifs_sb, 0);
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, 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 buf_size = dst_size;
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;
if (buf_size == 0) {
/* skip copy - calc size only */
rc += user_name_len;
} else 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;
rc += user_name_len;
} 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;
struct kvec rsp_iov = {NULL, 0};
int buftype = CIFS_NO_BUFFER;
struct smb2_query_info_rsp *rsp;
struct smb2_file_full_ea_info *info = NULL;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
rc = smb2_query_info_compound(xid, tcon, utf16_path,
FILE_READ_EA,
FILE_FULL_EA_INFORMATION,
SMB2_O_INFO_FILE,
CIFSMaxBufSize -
MAX_SMB2_CREATE_RESPONSE_SIZE -
MAX_SMB2_CLOSE_RESPONSE_SIZE,
&rsp_iov, &buftype, cifs_sb);
if (rc) {
/*
* 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 (!ea_name && rc == -ENODATA)
rc = 0;
goto qeas_exit;
}
rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength),
&rsp_iov,
sizeof(struct smb2_file_full_ea_info));
if (rc)
goto qeas_exit;
info = (struct smb2_file_full_ea_info *)(
le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
le32_to_cpu(rsp->OutputBufferLength), ea_name);
qeas_exit:
kfree(utf16_path);
free_rsp_buf(buftype, rsp_iov.iov_base);
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)
{
struct cifs_ses *ses = tcon->ses;
struct TCP_Server_Info *server = cifs_pick_channel(ses);
__le16 *utf16_path = NULL;
int ea_name_len = strlen(ea_name);
int flags = CIFS_CP_CREATE_CLOSE_OP;
int len;
struct smb_rqst rqst[3];
int resp_buftype[3];
struct kvec rsp_iov[3];
struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
struct cifs_open_parms oparms;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_fid fid;
struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
unsigned int size[1];
void *data[1];
struct smb2_file_full_ea_info *ea = NULL;
struct kvec close_iov[1];
struct smb2_query_info_rsp *rsp;
int rc, used_len = 0;
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
if (ea_name_len > 255)
return -EINVAL;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
memset(rqst, 0, sizeof(rqst));
resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
memset(rsp_iov, 0, sizeof(rsp_iov));
if (ses->server->ops->query_all_EAs) {
if (!ea_value) {
rc = ses->server->ops->query_all_EAs(xid, tcon, path,
ea_name, NULL, 0,
cifs_sb);
if (rc == -ENODATA)
goto sea_exit;
} else {
/* If we are adding a attribute we should first check
* if there will be enough space available to store
* the new EA. If not we should not add it since we
* would not be able to even read the EAs back.
*/
rc = smb2_query_info_compound(xid, tcon, utf16_path,
FILE_READ_EA,
FILE_FULL_EA_INFORMATION,
SMB2_O_INFO_FILE,
CIFSMaxBufSize -
MAX_SMB2_CREATE_RESPONSE_SIZE -
MAX_SMB2_CLOSE_RESPONSE_SIZE,
&rsp_iov[1], &resp_buftype[1], cifs_sb);
if (rc == 0) {
rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
used_len = le32_to_cpu(rsp->OutputBufferLength);
}
free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
resp_buftype[1] = CIFS_NO_BUFFER;
memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
rc = 0;
/* Use a fudge factor of 256 bytes in case we collide
* with a different set_EAs command.
*/
if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
used_len + ea_name_len + ea_value_len + 1) {
rc = -ENOSPC;
goto sea_exit;
}
}
}
/* Open */
memset(&open_iov, 0, sizeof(open_iov));
rqst[0].rq_iov = open_iov;
rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
memset(&oparms, 0, sizeof(oparms));
oparms.tcon = tcon;
oparms.desired_access = FILE_WRITE_EA;
oparms.disposition = FILE_OPEN;
oparms.create_options = cifs_create_options(cifs_sb, 0);
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open_init(tcon, server,
&rqst[0], &oplock, &oparms, utf16_path);
if (rc)
goto sea_exit;
smb2_set_next_command(tcon, &rqst[0]);
/* Set Info */
memset(&si_iov, 0, sizeof(si_iov));
rqst[1].rq_iov = si_iov;
rqst[1].rq_nvec = 1;
len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
ea = kzalloc(len, GFP_KERNEL);
if (ea == NULL) {
rc = -ENOMEM;
goto sea_exit;
}
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);
size[0] = len;
data[0] = ea;
rc = SMB2_set_info_init(tcon, server,
&rqst[1], COMPOUND_FID,
COMPOUND_FID, current->tgid,
FILE_FULL_EA_INFORMATION,
SMB2_O_INFO_FILE, 0, data, size);
smb2_set_next_command(tcon, &rqst[1]);
smb2_set_related(&rqst[1]);
/* Close */
memset(&close_iov, 0, sizeof(close_iov));
rqst[2].rq_iov = close_iov;
rqst[2].rq_nvec = 1;
rc = SMB2_close_init(tcon, server,
&rqst[2], COMPOUND_FID, COMPOUND_FID, false);
smb2_set_related(&rqst[2]);
rc = compound_send_recv(xid, ses, server,
flags, 3, rqst,
resp_buftype, rsp_iov);
/* no need to bump num_remote_opens because handle immediately closed */
sea_exit:
kfree(ea);
kfree(utf16_path);
SMB2_open_free(&rqst[0]);
SMB2_set_info_free(&rqst[1]);
SMB2_close_free(&rqst[2]);
free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
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)
{
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);
}
}
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)
{
atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
/*
* Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
* totals (requests sent) since those SMBs are per-session not per tcon
*/
seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
(long long)(tcon->bytes_read),
(long long)(tcon->bytes_written));
seq_printf(m, "\nOpen files: %d total (local), %d open on server",
atomic_read(&tcon->num_local_opens),
atomic_read(&tcon->num_remote_opens));
seq_printf(m, "\nTreeConnects: %d total %d failed",
atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
seq_printf(m, "\nTreeDisconnects: %d total %d failed",
atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
seq_printf(m, "\nCreates: %d total %d failed",
atomic_read(&sent[SMB2_CREATE_HE]),
atomic_read(&failed[SMB2_CREATE_HE]));
seq_printf(m, "\nCloses: %d total %d failed",
atomic_read(&sent[SMB2_CLOSE_HE]),
atomic_read(&failed[SMB2_CLOSE_HE]));
seq_printf(m, "\nFlushes: %d total %d failed",
atomic_read(&sent[SMB2_FLUSH_HE]),
atomic_read(&failed[SMB2_FLUSH_HE]));
seq_printf(m, "\nReads: %d total %d failed",
atomic_read(&sent[SMB2_READ_HE]),
atomic_read(&failed[SMB2_READ_HE]));
seq_printf(m, "\nWrites: %d total %d failed",
atomic_read(&sent[SMB2_WRITE_HE]),
atomic_read(&failed[SMB2_WRITE_HE]));
seq_printf(m, "\nLocks: %d total %d failed",
atomic_read(&sent[SMB2_LOCK_HE]),
atomic_read(&failed[SMB2_LOCK_HE]));
seq_printf(m, "\nIOCTLs: %d total %d failed",
atomic_read(&sent[SMB2_IOCTL_HE]),
atomic_read(&failed[SMB2_IOCTL_HE]));
seq_printf(m, "\nQueryDirectories: %d total %d failed",
atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
seq_printf(m, "\nChangeNotifies: %d total %d failed",
atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
seq_printf(m, "\nQueryInfos: %d total %d failed",
atomic_read(&sent[SMB2_QUERY_INFO_HE]),
atomic_read(&failed[SMB2_QUERY_INFO_HE]));
seq_printf(m, "\nSetInfos: %d total %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]));
}
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;
cfile->fid.access = fid->access;
#ifdef CONFIG_CIFS_DEBUG2
cfile->fid.mid = fid->mid;
#endif /* CIFS_DEBUG2 */
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 void
smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile)
{
struct smb2_file_network_open_info file_inf;
struct inode *inode;
int rc;
rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, &file_inf);
if (rc)
return;
inode = d_inode(cfile->dentry);
spin_lock(&inode->i_lock);
CIFS_I(inode)->time = jiffies;
/* Creation time should not need to be updated on close */
if (file_inf.LastWriteTime)
inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
if (file_inf.ChangeTime)
inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
if (file_inf.LastAccessTime)
inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
/*
* i_blocks is not related to (i_size / i_blksize),
* but instead 512 byte (2**9) size is required for
* calculating num blocks.
*/
if (le64_to_cpu(file_inf.AllocationSize) > 4096)
inode->i_blocks =
(512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
/* End of file and Attributes should not have to be updated on close */
spin_unlock(&inode->i_lock);
}
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 */, CIFSMaxBufSize,
(char **)&res_key, &ret_data_len);
if (rc == -EOPNOTSUPP) {
pr_warn_once("Server share %s does not support copy range\n", tcon->treeName);
goto req_res_key_exit;
} else if (rc) {
cifs_tcon_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_tcon_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;
}
struct iqi_vars {
struct smb_rqst rqst[3];
struct kvec rsp_iov[3];
struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
struct kvec qi_iov[1];
struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
struct kvec close_iov[1];
};
static int
smb2_ioctl_query_info(const unsigned int xid,
struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb,
__le16 *path, int is_dir,
unsigned long p)
{
struct iqi_vars *vars;
struct smb_rqst *rqst;
struct kvec *rsp_iov;
struct cifs_ses *ses = tcon->ses;
struct TCP_Server_Info *server = cifs_pick_channel(ses);
char __user *arg = (char __user *)p;
struct smb_query_info qi;
struct smb_query_info __user *pqi;
int rc = 0;
int flags = CIFS_CP_CREATE_CLOSE_OP;
struct smb2_query_info_rsp *qi_rsp = NULL;
struct smb2_ioctl_rsp *io_rsp = NULL;
void *buffer = NULL;
int resp_buftype[3];
struct cifs_open_parms oparms;
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_fid fid;
unsigned int size[2];
void *data[2];
int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
if (vars == NULL)
return -ENOMEM;
rqst = &vars->rqst[0];
rsp_iov = &vars->rsp_iov[0];
resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
goto e_fault;
if (qi.output_buffer_length > 1024) {
kfree(vars);
return -EINVAL;
}
if (!ses || !server) {
kfree(vars);
return -EIO;
}
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
buffer = memdup_user(arg + sizeof(struct smb_query_info),
qi.output_buffer_length);
if (IS_ERR(buffer)) {
kfree(vars);
return PTR_ERR(buffer);
}
/* Open */
rqst[0].rq_iov = &vars->open_iov[0];
rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
memset(&oparms, 0, sizeof(oparms));
oparms.tcon = tcon;
oparms.disposition = FILE_OPEN;
oparms.create_options = cifs_create_options(cifs_sb, create_options);
oparms.fid = &fid;
oparms.reconnect = false;
if (qi.flags & PASSTHRU_FSCTL) {
switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
break;
case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
oparms.desired_access = GENERIC_ALL;
break;
case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
oparms.desired_access = GENERIC_READ;
break;
case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
oparms.desired_access = GENERIC_WRITE;
break;
}
} else if (qi.flags & PASSTHRU_SET_INFO) {
oparms.desired_access = GENERIC_WRITE;
} else {
oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
}
rc = SMB2_open_init(tcon, server,
&rqst[0], &oplock, &oparms, path);
if (rc)
goto iqinf_exit;
smb2_set_next_command(tcon, &rqst[0]);
/* Query */
if (qi.flags & PASSTHRU_FSCTL) {
/* Can eventually relax perm check since server enforces too */
if (!capable(CAP_SYS_ADMIN))
rc = -EPERM;
else {
rqst[1].rq_iov = &vars->io_iov[0];
rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
rc = SMB2_ioctl_init(tcon, server,
&rqst[1],
COMPOUND_FID, COMPOUND_FID,
qi.info_type, true, buffer,
qi.output_buffer_length,
CIFSMaxBufSize -
MAX_SMB2_CREATE_RESPONSE_SIZE -
MAX_SMB2_CLOSE_RESPONSE_SIZE);
}
} else if (qi.flags == PASSTHRU_SET_INFO) {
/* Can eventually relax perm check since server enforces too */
if (!capable(CAP_SYS_ADMIN))
rc = -EPERM;
else {
rqst[1].rq_iov = &vars->si_iov[0];
rqst[1].rq_nvec = 1;
size[0] = 8;
data[0] = buffer;
rc = SMB2_set_info_init(tcon, server,
&rqst[1],
COMPOUND_FID, COMPOUND_FID,
current->tgid,
FILE_END_OF_FILE_INFORMATION,
SMB2_O_INFO_FILE, 0, data, size);
}
} else if (qi.flags == PASSTHRU_QUERY_INFO) {
rqst[1].rq_iov = &vars->qi_iov[0];
rqst[1].rq_nvec = 1;
rc = SMB2_query_info_init(tcon, server,
&rqst[1], COMPOUND_FID,
COMPOUND_FID, qi.file_info_class,
qi.info_type, qi.additional_information,
qi.input_buffer_length,
qi.output_buffer_length, buffer);
} else { /* unknown flags */
cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
qi.flags);
rc = -EINVAL;
}
if (rc)
goto iqinf_exit;
smb2_set_next_command(tcon, &rqst[1]);
smb2_set_related(&rqst[1]);
/* Close */
rqst[2].rq_iov = &vars->close_iov[0];
rqst[2].rq_nvec = 1;
rc = SMB2_close_init(tcon, server,
&rqst[2], COMPOUND_FID, COMPOUND_FID, false);
if (rc)
goto iqinf_exit;
smb2_set_related(&rqst[2]);
rc = compound_send_recv(xid, ses, server,
flags, 3, rqst,
resp_buftype, rsp_iov);
if (rc)
goto iqinf_exit;
/* No need to bump num_remote_opens since handle immediately closed */
if (qi.flags & PASSTHRU_FSCTL) {
pqi = (struct smb_query_info __user *)arg;
io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
if (qi.input_buffer_length > 0 &&
le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
> rsp_iov[1].iov_len)
goto e_fault;
if (copy_to_user(&pqi->input_buffer_length,
&qi.input_buffer_length,
sizeof(qi.input_buffer_length)))
goto e_fault;
if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
(const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
qi.input_buffer_length))
goto e_fault;
} else {
pqi = (struct smb_query_info __user *)arg;
qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
if (copy_to_user(&pqi->input_buffer_length,
&qi.input_buffer_length,
sizeof(qi.input_buffer_length)))
goto e_fault;
if (copy_to_user(pqi + 1, qi_rsp->Buffer,
qi.input_buffer_length))
goto e_fault;
}
iqinf_exit:
cifs_small_buf_release(rqst[0].rq_iov[0].iov_base);
cifs_small_buf_release(rqst[1].rq_iov[0].iov_base);
cifs_small_buf_release(rqst[2].rq_iov[0].iov_base);
free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
kfree(vars);
kfree(buffer);
return rc;
e_fault:
rc = -EFAULT;
goto iqinf_exit;
}
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, "%s: about to call request res key\n", __func__);
/* 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 */
kfree(retbuf);
retbuf = NULL;
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), CIFSMaxBufSize,
(char **)&retbuf, &ret_data_len);
if (rc == 0) {
if (ret_data_len !=
sizeof(struct copychunk_ioctl_rsp)) {
cifs_tcon_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_tcon_dbg(VFS, "Invalid copy chunk response\n");
rc = -EIO;
goto cchunk_out;
}
if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
cifs_tcon_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, CIFSMaxBufSize, 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);
}
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 inode *inode;
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\n",
src_off, dest_off, len);
inode = d_inode(trgtfile->dentry);
if (inode->i_size < dest_off + len) {
rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
if (rc)
goto duplicate_extents_out;
/*
* Although also could set plausible allocation size (i_blocks)
* here in addition to setting the file size, in reflink
* it is likely that the target file is sparse. Its allocation
* size will be queried on next revalidate, but it is important
* to make sure that file's cached size is updated immediately
*/
cifs_setsize(inode, dest_off + len);
}
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),
CIFSMaxBufSize, NULL,
&ret_data_len);
if (ret_data_len > 0)
cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
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),
CIFSMaxBufSize, NULL,
&ret_data_len);
}
/* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
#define GMT_TOKEN_SIZE 50
#define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
/*
* Input buffer contains (empty) struct smb_snapshot array with size filled in
* For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
*/
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;
u32 max_response_size;
struct smb_snapshot_array snapshot_in;
/*
* On the first query to enumerate the list of snapshots available
* for this volume the buffer begins with 0 (number of snapshots
* which can be returned is zero since at that point we do not know
* how big the buffer needs to be). On the second query,
* it (ret_data_len) is set to number of snapshots so we can
* know to set the maximum response size larger (see below).
*/
if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
return -EFAULT;
/*
* Note that for snapshot queries that servers like Azure expect that
* the first query be minimal size (and just used to get the number/size
* of previous versions) so response size must be specified as EXACTLY
* sizeof(struct snapshot_array) which is 16 when rounded up to multiple
* of eight bytes.
*/
if (ret_data_len == 0)
max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
else
max_response_size = CIFSMaxBufSize;
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 */, max_response_size,
(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;
}
/*
* Check for min size, ie not large enough to fit even one GMT
* token (snapshot). On the first ioctl some users may pass in
* smaller size (or zero) to simply get the size of the array
* so the user space caller can allocate sufficient memory
* and retry the ioctl again with larger array size sufficient
* to hold all of the snapshot GMT tokens on the second try.
*/
if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
ret_data_len = sizeof(struct smb_snapshot_array);
/*
* We return struct SRV_SNAPSHOT_ARRAY, followed by
* the snapshot array (of 50 byte GMT tokens) each
* representing an available previous version of the data
*/
if (ret_data_len > (snapshot_in.snapshot_array_size +
sizeof(struct smb_snapshot_array)))
ret_data_len = snapshot_in.snapshot_array_size +
sizeof(struct smb_snapshot_array);
if (copy_to_user(ioc_buf, retbuf, ret_data_len))
rc = -EFAULT;
}
kfree(retbuf);
return rc;
}
static int
smb3_notify(const unsigned int xid, struct file *pfile,
void __user *ioc_buf)
{
struct smb3_notify notify;
struct dentry *dentry = pfile->f_path.dentry;
struct inode *inode = file_inode(pfile);
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct cifs_open_parms oparms;
struct cifs_fid fid;
struct cifs_tcon *tcon;
const unsigned char *path;
void *page = alloc_dentry_path();
__le16 *utf16_path = NULL;
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
int rc = 0;
path = build_path_from_dentry(dentry, page);
if (IS_ERR(path)) {
rc = PTR_ERR(path);
goto notify_exit;
}
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (utf16_path == NULL) {
rc = -ENOMEM;
goto notify_exit;
}
if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
rc = -EFAULT;
goto notify_exit;
}
tcon = cifs_sb_master_tcon(cifs_sb);
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
oparms.disposition = FILE_OPEN;
oparms.create_options = cifs_create_options(cifs_sb, 0);
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
NULL);
if (rc)
goto notify_exit;
rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
notify.watch_tree, notify.completion_filter);
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
notify_exit:
free_dentry_path(page);
kfree(utf16_path);
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;
struct smb_rqst rqst[2];
struct kvec rsp_iov[2];
int resp_buftype[2];
struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
int rc, flags = 0;
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct smb2_query_directory_rsp *qd_rsp = NULL;
struct smb2_create_rsp *op_rsp = NULL;
struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
int retry_count = 0;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
memset(rqst, 0, sizeof(rqst));
resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
memset(rsp_iov, 0, sizeof(rsp_iov));
/* Open */
memset(&open_iov, 0, sizeof(open_iov));
rqst[0].rq_iov = open_iov;
rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
oparms.disposition = FILE_OPEN;
oparms.create_options = cifs_create_options(cifs_sb, 0);
oparms.fid = fid;
oparms.reconnect = false;
rc = SMB2_open_init(tcon, server,
&rqst[0], &oplock, &oparms, utf16_path);
if (rc)
goto qdf_free;
smb2_set_next_command(tcon, &rqst[0]);
/* Query directory */
srch_inf->entries_in_buffer = 0;
srch_inf->index_of_last_entry = 2;
memset(&qd_iov, 0, sizeof(qd_iov));
rqst[1].rq_iov = qd_iov;
rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
rc = SMB2_query_directory_init(xid, tcon, server,
&rqst[1],
COMPOUND_FID, COMPOUND_FID,
0, srch_inf->info_level);
if (rc)
goto qdf_free;
smb2_set_related(&rqst[1]);
again:
rc = compound_send_recv(xid, tcon->ses, server,
flags, 2, rqst,
resp_buftype, rsp_iov);
if (rc == -EAGAIN && retry_count++ < 10)
goto again;
/* If the open failed there is nothing to do */
op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
goto qdf_free;
}
fid->persistent_fid = le64_to_cpu(op_rsp->PersistentFileId);
fid->volatile_fid = le64_to_cpu(op_rsp->VolatileFileId);
/* Anything else than ENODATA means a genuine error */
if (rc && rc != -ENODATA) {
SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
trace_smb3_query_dir_err(xid, fid->persistent_fid,
tcon->tid, tcon->ses->Suid, 0, 0, rc);
goto qdf_free;
}
atomic_inc(&tcon->num_remote_opens);
qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
trace_smb3_query_dir_done(xid, fid->persistent_fid,
tcon->tid, tcon->ses->Suid, 0, 0);
srch_inf->endOfSearch = true;
rc = 0;
goto qdf_free;
}
rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
srch_inf);
if (rc) {
trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
tcon->ses->Suid, 0, 0, rc);
goto qdf_free;
}
resp_buftype[1] = CIFS_NO_BUFFER;
trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
qdf_free:
kfree(utf16_path);
SMB2_open_free(&rqst[0]);
SMB2_query_directory_free(&rqst[1]);
free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
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)
{
struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
int scredits, in_flight;
if (shdr->Status != STATUS_PENDING)
return false;
if (shdr->CreditRequest) {
spin_lock(&server->req_lock);
server->credits += le16_to_cpu(shdr->CreditRequest);
scredits = server->credits;
in_flight = server->in_flight;
spin_unlock(&server->req_lock);
wake_up(&server->request_q);
trace_smb3_add_credits(server->CurrentMid,
server->conn_id, server->hostname, scredits,
le16_to_cpu(shdr->CreditRequest), in_flight);
cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
__func__, le16_to_cpu(shdr->CreditRequest), scredits);
}
return true;
}
static bool
smb2_is_session_expired(char *buf)
{
struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
shdr->Status != STATUS_USER_SESSION_DELETED)
return false;
trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
le64_to_cpu(shdr->SessionId),
le16_to_cpu(shdr->Command),
le64_to_cpu(shdr->MessageId));
cifs_dbg(FYI, "Session expired or deleted\n");
return true;
}
static bool
smb2_is_status_io_timeout(char *buf)
{
struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
if (shdr->Status == STATUS_IO_TIMEOUT)
return true;
else
return false;
}
static void
smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
{
struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
struct list_head *tmp, *tmp1;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
return;
spin_lock(&cifs_tcp_ses_lock);
list_for_each(tmp, &server->smb_ses_list) {
ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
list_for_each(tmp1, &ses->tcon_list) {
tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
tcon->need_reconnect = true;
spin_unlock(&cifs_tcp_ses_lock);
pr_warn_once("Server share %s deleted.\n",
tcon->treeName);
return;
}
}
}
spin_unlock(&cifs_tcp_ses_lock);
}
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);
}
void
smb2_set_related(struct smb_rqst *rqst)
{
struct smb2_hdr *shdr;
shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
if (shdr == NULL) {
cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
return;
}
shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
}
char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
void
smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
{
struct smb2_hdr *shdr;
struct cifs_ses *ses = tcon->ses;
struct TCP_Server_Info *server = ses->server;
unsigned long len = smb_rqst_len(server, rqst);
int i, num_padding;
shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
if (shdr == NULL) {
cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
return;
}
/* SMB headers in a compound are 8 byte aligned. */
/* No padding needed */
if (!(len & 7))
goto finished;
num_padding = 8 - (len & 7);
if (!smb3_encryption_required(tcon)) {
/*
* If we do not have encryption then we can just add an extra
* iov for the padding.
*/
rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
rqst->rq_nvec++;
len += num_padding;
} else {
/*
* We can not add a small padding iov for the encryption case
* because the encryption framework can not handle the padding
* iovs.
* We have to flatten this into a single buffer and add
* the padding to it.
*/
for (i = 1; i < rqst->rq_nvec; i++) {
memcpy(rqst->rq_iov[0].iov_base +
rqst->rq_iov[0].iov_len,
rqst->rq_iov[i].iov_base,
rqst->rq_iov[i].iov_len);
rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
}
memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
0, num_padding);
rqst->rq_iov[0].iov_len += num_padding;
len += num_padding;
rqst->rq_nvec = 1;
}
finished:
shdr->NextCommand = cpu_to_le32(len);
}
/*
* Passes the query info response back to the caller on success.
* Caller need to free this with free_rsp_buf().
*/
int
smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
__le16 *utf16_path, u32 desired_access,
u32 class, u32 type, u32 output_len,
struct kvec *rsp, int *buftype,
struct cifs_sb_info *cifs_sb)
{
struct cifs_ses *ses = tcon->ses;
struct TCP_Server_Info *server = cifs_pick_channel(ses);
int flags = CIFS_CP_CREATE_CLOSE_OP;
struct smb_rqst rqst[3];
int resp_buftype[3];
struct kvec rsp_iov[3];
struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
struct kvec qi_iov[1];
struct kvec close_iov[1];
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
int rc;
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
memset(rqst, 0, sizeof(rqst));
resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
memset(rsp_iov, 0, sizeof(rsp_iov));
memset(&open_iov, 0, sizeof(open_iov));
rqst[0].rq_iov = open_iov;
rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
oparms.tcon = tcon;
oparms.desired_access = desired_access;
oparms.disposition = FILE_OPEN;
oparms.create_options = cifs_create_options(cifs_sb, 0);
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open_init(tcon, server,
&rqst[0], &oplock, &oparms, utf16_path);
if (rc)
goto qic_exit;
smb2_set_next_command(tcon, &rqst[0]);
memset(&qi_iov, 0, sizeof(qi_iov));
rqst[1].rq_iov = qi_iov;
rqst[1].rq_nvec = 1;
rc = SMB2_query_info_init(tcon, server,
&rqst[1], COMPOUND_FID, COMPOUND_FID,
class, type, 0,
output_len, 0,
NULL);
if (rc)
goto qic_exit;
smb2_set_next_command(tcon, &rqst[1]);
smb2_set_related(&rqst[1]);
memset(&close_iov, 0, sizeof(close_iov));
rqst[2].rq_iov = close_iov;
rqst[2].rq_nvec = 1;
rc = SMB2_close_init(tcon, server,
&rqst[2], COMPOUND_FID, COMPOUND_FID, false);
if (rc)
goto qic_exit;
smb2_set_related(&rqst[2]);
rc = compound_send_recv(xid, ses, server,
flags, 3, rqst,
resp_buftype, rsp_iov);
if (rc) {
free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
if (rc == -EREMCHG) {
tcon->need_reconnect = true;
pr_warn_once("server share %s deleted\n",
tcon->treeName);
}
goto qic_exit;
}
*rsp = rsp_iov[1];
*buftype = resp_buftype[1];
qic_exit:
SMB2_open_free(&rqst[0]);
SMB2_query_info_free(&rqst[1]);
SMB2_close_free(&rqst[2]);
free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
return rc;
}
static int
smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
{
struct smb2_query_info_rsp *rsp;
struct smb2_fs_full_size_info *info = NULL;
__le16 utf16_path = 0; /* Null - open root of share */
struct kvec rsp_iov = {NULL, 0};
int buftype = CIFS_NO_BUFFER;
int rc;
rc = smb2_query_info_compound(xid, tcon, &utf16_path,
FILE_READ_ATTRIBUTES,
FS_FULL_SIZE_INFORMATION,
SMB2_O_INFO_FILESYSTEM,
sizeof(struct smb2_fs_full_size_info),
&rsp_iov, &buftype, cifs_sb);
if (rc)
goto qfs_exit;
rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
buf->f_type = SMB2_MAGIC_NUMBER;
info = (struct smb2_fs_full_size_info *)(
le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength),
&rsp_iov,
sizeof(struct smb2_fs_full_size_info));
if (!rc)
smb2_copy_fs_info_to_kstatfs(info, buf);
qfs_exit:
free_rsp_buf(buftype, rsp_iov.iov_base);
return rc;
}
static int
smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, 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;
if (!tcon->posix_extensions)
return smb2_queryfs(xid, tcon, cifs_sb, buf);
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = cifs_create_options(cifs_sb, 0);
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
NULL, NULL);
if (rc)
return rc;
rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
fid.volatile_fid, buf);
buf->f_type = SMB2_MAGIC_NUMBER;
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;
int retry_count = 0;
cifs_dbg(FYI, "%s: path: %s\n", __func__, 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, CIFSMaxBufSize,
(char **)&dfs_rsp, &dfs_rsp_size);
if (!is_retryable_error(rc))
break;
usleep_range(512, 2048);
} while (++retry_count < 5);
if (rc) {
if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, 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_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
goto out;
}
out:
if (tcon && !tcon->ipc) {
/* ipc tcons are not refcounted */
spin_lock(&cifs_tcp_ses_lock);
tcon->tc_count--;
/* tc_count can never go negative */
WARN_ON(tcon->tc_count < 0);
spin_unlock(&cifs_tcp_ses_lock);
}
kfree(utf16_path);
kfree(dfs_req);
kfree(dfs_rsp);
return rc;
}
static int
parse_reparse_posix(struct reparse_posix_data *symlink_buf,
u32 plen, char **target_path,
struct cifs_sb_info *cifs_sb)
{
unsigned int len;
/* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
len = le16_to_cpu(symlink_buf->ReparseDataLength);
if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
cifs_dbg(VFS, "%lld not a supported symlink type\n",
le64_to_cpu(symlink_buf->InodeType));
return -EOPNOTSUPP;
}
*target_path = cifs_strndup_from_utf16(
symlink_buf->PathBuffer,
len, true, cifs_sb->local_nls);
if (!(*target_path))
return -ENOMEM;
convert_delimiter(*target_path, '/');
cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
return 0;
}
static int
parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
u32 plen, char **target_path,
struct cifs_sb_info *cifs_sb)
{
unsigned int sub_len;
unsigned int sub_offset;
/* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
if (sub_offset + 20 > plen ||
sub_offset + sub_len + 20 > plen) {
cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
return -EIO;
}
*target_path = cifs_strndup_from_utf16(
symlink_buf->PathBuffer + sub_offset,
sub_len, true, cifs_sb->local_nls);
if (!(*target_path))
return -ENOMEM;
convert_delimiter(*target_path, '/');
cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
return 0;
}
static int
parse_reparse_point(struct reparse_data_buffer *buf,
u32 plen, char **target_path,
struct cifs_sb_info *cifs_sb)
{
if (plen < sizeof(struct reparse_data_buffer)) {
cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
plen);
return -EIO;
}
if (plen < le16_to_cpu(buf->ReparseDataLength) +
sizeof(struct reparse_data_buffer)) {
cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
plen);
return -EIO;
}
/* See MS-FSCC 2.1.2 */
switch (le32_to_cpu(buf->ReparseTag)) {
case IO_REPARSE_TAG_NFS:
return parse_reparse_posix(
(struct reparse_posix_data *)buf,
plen, target_path, cifs_sb);
case IO_REPARSE_TAG_SYMLINK:
return parse_reparse_symlink(
(struct reparse_symlink_data_buffer *)buf,
plen, target_path, cifs_sb);
default:
cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
le32_to_cpu(buf->ReparseTag));
return -EOPNOTSUPP;
}
}
#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,
struct cifs_sb_info *cifs_sb, const char *full_path,
char **target_path, bool is_reparse_point)
{
int rc;
__le16 *utf16_path = NULL;
__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;
struct smb2_symlink_err_rsp *symlink;
struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
unsigned int sub_len;
unsigned int sub_offset;
unsigned int print_len;
unsigned int print_offset;
int flags = CIFS_CP_CREATE_CLOSE_OP;
struct smb_rqst rqst[3];
int resp_buftype[3];
struct kvec rsp_iov[3];
struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
struct kvec close_iov[1];
struct smb2_create_rsp *create_rsp;
struct smb2_ioctl_rsp *ioctl_rsp;
struct reparse_data_buffer *reparse_buf;
int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
u32 plen;
cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
*target_path = NULL;
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
memset(rqst, 0, sizeof(rqst));
resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
memset(rsp_iov, 0, sizeof(rsp_iov));
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
/* Open */
memset(&open_iov, 0, sizeof(open_iov));
rqst[0].rq_iov = open_iov;
rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
memset(&oparms, 0, sizeof(oparms));
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = cifs_create_options(cifs_sb, create_options);
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open_init(tcon, server,
&rqst[0], &oplock, &oparms, utf16_path);
if (rc)
goto querty_exit;
smb2_set_next_command(tcon, &rqst[0]);
/* IOCTL */
memset(&io_iov, 0, sizeof(io_iov));
rqst[1].rq_iov = io_iov;
rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
rc = SMB2_ioctl_init(tcon, server,
&rqst[1], fid.persistent_fid,
fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
true /* is_fctl */, NULL, 0,
CIFSMaxBufSize -
MAX_SMB2_CREATE_RESPONSE_SIZE -
MAX_SMB2_CLOSE_RESPONSE_SIZE);
if (rc)
goto querty_exit;
smb2_set_next_command(tcon, &rqst[1]);
smb2_set_related(&rqst[1]);
/* Close */
memset(&close_iov, 0, sizeof(close_iov));
rqst[2].rq_iov = close_iov;
rqst[2].rq_nvec = 1;
rc = SMB2_close_init(tcon, server,
&rqst[2], COMPOUND_FID, COMPOUND_FID, false);
if (rc)
goto querty_exit;
smb2_set_related(&rqst[2]);
rc = compound_send_recv(xid, tcon->ses, server,
flags, 3, rqst,
resp_buftype, rsp_iov);
create_rsp = rsp_iov[0].iov_base;
if (create_rsp && create_rsp->hdr.Status)
err_iov = rsp_iov[0];
ioctl_rsp = rsp_iov[1].iov_base;
/*
* Open was successful and we got an ioctl response.
*/
if ((rc == 0) && (is_reparse_point)) {
/* See MS-FSCC 2.3.23 */
reparse_buf = (struct reparse_data_buffer *)
((char *)ioctl_rsp +
le32_to_cpu(ioctl_rsp->OutputOffset));
plen = le32_to_cpu(ioctl_rsp->OutputCount);
if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
rsp_iov[1].iov_len) {
cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
plen);
rc = -EIO;
goto querty_exit;
}
rc = parse_reparse_point(reparse_buf, plen, target_path,
cifs_sb);
goto querty_exit;
}
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 = -EINVAL;
goto querty_exit;
}
symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
rc = -EINVAL;
goto querty_exit;
}
/* open must fail on symlink - reset rc */
rc = 0;
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 = -EINVAL;
goto querty_exit;
}
if (err_iov.iov_len <
SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
rc = -EINVAL;
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:
cifs_dbg(FYI, "query symlink rc %d\n", rc);
kfree(utf16_path);
SMB2_open_free(&rqst[0]);
SMB2_ioctl_free(&rqst[1]);
SMB2_close_free(&rqst[2]);
free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
return rc;
}
int
smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path,
__u32 *tag)
{
int rc;
__le16 *utf16_path = NULL;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
int flags = CIFS_CP_CREATE_CLOSE_OP;
struct smb_rqst rqst[3];
int resp_buftype[3];
struct kvec rsp_iov[3];
struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
struct kvec close_iov[1];
struct smb2_ioctl_rsp *ioctl_rsp;
struct reparse_data_buffer *reparse_buf;
u32 plen;
cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
memset(rqst, 0, sizeof(rqst));
resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
memset(rsp_iov, 0, sizeof(rsp_iov));
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
/*
* setup smb2open - TODO add optimization to call cifs_get_readable_path
* to see if there is a handle already open that we can use
*/
memset(&open_iov, 0, sizeof(open_iov));
rqst[0].rq_iov = open_iov;
rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
memset(&oparms, 0, sizeof(oparms));
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT);
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open_init(tcon, server,
&rqst[0], &oplock, &oparms, utf16_path);
if (rc)
goto query_rp_exit;
smb2_set_next_command(tcon, &rqst[0]);
/* IOCTL */
memset(&io_iov, 0, sizeof(io_iov));
rqst[1].rq_iov = io_iov;
rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
rc = SMB2_ioctl_init(tcon, server,
&rqst[1], COMPOUND_FID,
COMPOUND_FID, FSCTL_GET_REPARSE_POINT,
true /* is_fctl */, NULL, 0,
CIFSMaxBufSize -
MAX_SMB2_CREATE_RESPONSE_SIZE -
MAX_SMB2_CLOSE_RESPONSE_SIZE);
if (rc)
goto query_rp_exit;
smb2_set_next_command(tcon, &rqst[1]);
smb2_set_related(&rqst[1]);
/* Close */
memset(&close_iov, 0, sizeof(close_iov));
rqst[2].rq_iov = close_iov;
rqst[2].rq_nvec = 1;
rc = SMB2_close_init(tcon, server,
&rqst[2], COMPOUND_FID, COMPOUND_FID, false);
if (rc)
goto query_rp_exit;
smb2_set_related(&rqst[2]);
rc = compound_send_recv(xid, tcon->ses, server,
flags, 3, rqst,
resp_buftype, rsp_iov);
ioctl_rsp = rsp_iov[1].iov_base;
/*
* Open was successful and we got an ioctl response.
*/
if (rc == 0) {
/* See MS-FSCC 2.3.23 */
reparse_buf = (struct reparse_data_buffer *)
((char *)ioctl_rsp +
le32_to_cpu(ioctl_rsp->OutputOffset));
plen = le32_to_cpu(ioctl_rsp->OutputCount);
if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
rsp_iov[1].iov_len) {
cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
plen);
rc = -EIO;
goto query_rp_exit;
}
*tag = le32_to_cpu(reparse_buf->ReparseTag);
}
query_rp_exit:
kfree(utf16_path);
SMB2_open_free(&rqst[0]);
SMB2_ioctl_free(&rqst[1]);
SMB2_close_free(&rqst[2]);
free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
return rc;
}
static struct cifs_ntsd *
get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
{
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,
info);
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, u32 info)
{
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();
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;
/*
* When querying an ACL, even if the file is a symlink we want to open
* the source not the target, and so the protocol requires that the
* client specify this flag when opening a reparse point
*/
oparms.create_options = cifs_create_options(cifs_sb, 0) | OPEN_REPARSE_POINT;
oparms.fid = &fid;
oparms.reconnect = false;
if (info & SACL_SECINFO)
oparms.desired_access |= SYSTEM_SECURITY;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, 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,
info);
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;
}
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 (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
access_flags |= WRITE_OWNER;
if (aclflag & CIFS_ACL_SACL)
access_flags |= SYSTEM_SECURITY;
if (aclflag & CIFS_ACL_DACL)
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.create_options = cifs_create_options(cifs_sb, 0);
oparms.disposition = FILE_OPEN;
oparms.path = path;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, 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;
}
/* 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, u32 info)
{
struct cifs_ntsd *pntsd = NULL;
struct cifsFileInfo *open_file = NULL;
if (inode && !(info & SACL_SECINFO))
open_file = find_readable_file(CIFS_I(inode), true);
if (!open_file || (info & SACL_SECINFO))
return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
cifsFileInfo_put(open_file);
return pntsd;
}
static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
loff_t offset, loff_t len, bool keep_size)
{
struct cifs_ses *ses = tcon->ses;
struct inode *inode;
struct cifsInodeInfo *cifsi;
struct cifsFileInfo *cfile = file->private_data;
struct file_zero_data_information fsctl_buf;
long rc;
unsigned int xid;
__le64 eof;
xid = get_xid();
inode = d_inode(cfile->dentry);
cifsi = CIFS_I(inode);
trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
ses->Suid, offset, len);
/*
* We zero the range through ioctl, so we need remove the page caches
* first, otherwise the data may be inconsistent with the server.
*/
truncate_pagecache_range(inode, offset, offset + len - 1);
/* if file not oplocked can't be sure whether asking to extend size */
if (!CIFS_CACHE_READ(cifsi))
if (keep_size == false) {
rc = -EOPNOTSUPP;
trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
tcon->tid, ses->Suid, offset, len, rc);
free_xid(xid);
return rc;
}
cifs_dbg(FYI, "Offset %lld len %lld\n", 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,
(char *)&fsctl_buf,
sizeof(struct file_zero_data_information),
0, NULL, NULL);
if (rc)
goto zero_range_exit;
/*
* do we also need to change the size of the file?
*/
if (keep_size == false && i_size_read(inode) < offset + len) {
eof = cpu_to_le64(offset + len);
rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, cfile->pid, &eof);
}
zero_range_exit:
free_xid(xid);
if (rc)
trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
ses->Suid, offset, len, rc);
else
trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
ses->Suid, offset, len);
return rc;
}
static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
loff_t offset, loff_t len)
{
struct inode *inode;
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);
/* 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;
}
filemap_invalidate_lock(inode->i_mapping);
/*
* We implement the punch hole through ioctl, so we need remove the page
* caches first, otherwise the data may be inconsistent with the server.
*/
truncate_pagecache_range(inode, offset, offset + len - 1);
cifs_dbg(FYI, "Offset %lld len %lld\n", 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),
CIFSMaxBufSize, NULL, NULL);
free_xid(xid);
filemap_invalidate_unlock(inode->i_mapping);
return rc;
}
static int smb3_simple_fallocate_write_range(unsigned int xid,
struct cifs_tcon *tcon,
struct cifsFileInfo *cfile,
loff_t off, loff_t len,
char *buf)
{
struct cifs_io_parms io_parms = {0};
int nbytes;
int rc = 0;
struct kvec iov[2];
io_parms.netfid = cfile->fid.netfid;
io_parms.pid = current->tgid;
io_parms.tcon = tcon;
io_parms.persistent_fid = cfile->fid.persistent_fid;
io_parms.volatile_fid = cfile->fid.volatile_fid;
while (len) {
io_parms.offset = off;
io_parms.length = len;
if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
io_parms.length = SMB2_MAX_BUFFER_SIZE;
/* iov[0] is reserved for smb header */
iov[1].iov_base = buf;
iov[1].iov_len = io_parms.length;
rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
if (rc)
break;
if (nbytes > len)
return -EINVAL;
buf += nbytes;
off += nbytes;
len -= nbytes;
}
return rc;
}
static int smb3_simple_fallocate_range(unsigned int xid,
struct cifs_tcon *tcon,
struct cifsFileInfo *cfile,
loff_t off, loff_t len)
{
struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
u32 out_data_len;
char *buf = NULL;
loff_t l;
int rc;
in_data.file_offset = cpu_to_le64(off);
in_data.length = cpu_to_le64(len);
rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
FSCTL_QUERY_ALLOCATED_RANGES, true,
(char *)&in_data, sizeof(in_data),
1024 * sizeof(struct file_allocated_range_buffer),
(char **)&out_data, &out_data_len);
if (rc)
goto out;
buf = kzalloc(1024 * 1024, GFP_KERNEL);
if (buf == NULL) {
rc = -ENOMEM;
goto out;
}
tmp_data = out_data;
while (len) {
/*
* The rest of the region is unmapped so write it all.
*/
if (out_data_len == 0) {
rc = smb3_simple_fallocate_write_range(xid, tcon,
cfile, off, len, buf);
goto out;
}
if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
rc = -EINVAL;
goto out;
}
if (off < le64_to_cpu(tmp_data->file_offset)) {
/*
* We are at a hole. Write until the end of the region
* or until the next allocated data,
* whichever comes next.
*/
l = le64_to_cpu(tmp_data->file_offset) - off;
if (len < l)
l = len;
rc = smb3_simple_fallocate_write_range(xid, tcon,
cfile, off, l, buf);
if (rc)
goto out;
off = off + l;
len = len - l;
if (len == 0)
goto out;
}
/*
* We are at a section of allocated data, just skip forward
* until the end of the data or the end of the region
* we are supposed to fallocate, whichever comes first.
*/
l = le64_to_cpu(tmp_data->length);
if (len < l)
l = len;
off += l;
len -= l;
tmp_data = &tmp_data[1];
out_data_len -= sizeof(struct file_allocated_range_buffer);
}
out:
kfree(out_data);
kfree(buf);
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;
__le64 eof;
xid = get_xid();
inode = d_inode(cfile->dentry);
cifsi = CIFS_I(inode);
trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
tcon->ses->Suid, off, len);
/* if file not oplocked can't be sure whether asking to extend size */
if (!CIFS_CACHE_READ(cifsi))
if (keep_size == false) {
trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
tcon->tid, tcon->ses->Suid, off, len, rc);
free_xid(xid);
return rc;
}
/*
* Extending the file
*/
if ((keep_size == false) && i_size_read(inode) < off + len) {
rc = inode_newsize_ok(inode, off + len);
if (rc)
goto out;
if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
smb2_set_sparse(xid, tcon, cfile, inode, false);
eof = cpu_to_le64(off + len);
rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, cfile->pid, &eof);
if (rc == 0) {
cifsi->server_eof = off + len;
cifs_setsize(inode, off + len);
cifs_truncate_page(inode->i_mapping, inode->i_size);
truncate_setsize(inode, off + len);
}
goto out;
}
/*
* Files are non-sparse by default so falloc may be a no-op
* Must check if file sparse. If not sparse, and since we are not
* extending then no need to do anything since file already allocated
*/
if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
rc = 0;
goto out;
}
if (keep_size == true) {
/*
* We can not preallocate pages beyond the end of the file
* in SMB2
*/
if (off >= i_size_read(inode)) {
rc = 0;
goto out;
}
/*
* For fallocates that are partially beyond the end of file,
* clamp len so we only fallocate up to the end of file.
*/
if (off + len > i_size_read(inode)) {
len = i_size_read(inode) - off;
}
}
if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
/*
* At this point, we are trying to fallocate an internal
* regions of a sparse file. Since smb2 does not have a
* fallocate command we have two otions on how to emulate this.
* We can either turn the entire file to become non-sparse
* which we only do if the fallocate is for virtually
* the whole file, or we can overwrite the region with zeroes
* using SMB2_write, which could be prohibitevly expensive
* if len is large.
*/
/*
* We are only trying to fallocate a small region so
* just write it with zero.
*/
if (len <= 1024 * 1024) {
rc = smb3_simple_fallocate_range(xid, tcon, cfile,
off, len);
goto out;
}
/*
* 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;
goto out;
}
}
smb2_set_sparse(xid, tcon, cfile, inode, false);
rc = 0;
out:
if (rc)
trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
tcon->ses->Suid, off, len, rc);
else
trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
tcon->ses->Suid, off, len);
free_xid(xid);
return rc;
}
static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
loff_t off, loff_t len)
{
int rc;
unsigned int xid;
struct cifsFileInfo *cfile = file->private_data;
__le64 eof;
xid = get_xid();
if (off >= i_size_read(file->f_inode) ||
off + len >= i_size_read(file->f_inode)) {
rc = -EINVAL;
goto out;
}
rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
i_size_read(file->f_inode) - off - len, off);
if (rc < 0)
goto out;
eof = cpu_to_le64(i_size_read(file->f_inode) - len);
rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, cfile->pid, &eof);
if (rc < 0)
goto out;
rc = 0;
out:
free_xid(xid);
return rc;
}
static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
loff_t off, loff_t len)
{
int rc;
unsigned int xid;
struct cifsFileInfo *cfile = file->private_data;
__le64 eof;
__u64 count;
xid = get_xid();
if (off >= i_size_read(file->f_inode)) {
rc = -EINVAL;
goto out;
}
count = i_size_read(file->f_inode) - off;
eof = cpu_to_le64(i_size_read(file->f_inode) + len);
rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, cfile->pid, &eof);
if (rc < 0)
goto out;
rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
if (rc < 0)
goto out;
rc = smb3_zero_range(file, tcon, off, len, 1);
if (rc < 0)
goto out;
rc = 0;
out:
free_xid(xid);
return rc;
}
static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
{
struct cifsFileInfo *wrcfile, *cfile = file->private_data;
struct cifsInodeInfo *cifsi;
struct inode *inode;
int rc = 0;
struct file_allocated_range_buffer in_data, *out_data = NULL;
u32 out_data_len;
unsigned int xid;
if (whence != SEEK_HOLE && whence != SEEK_DATA)
return generic_file_llseek(file, offset, whence);
inode = d_inode(cfile->dentry);
cifsi = CIFS_I(inode);
if (offset < 0 || offset >= i_size_read(inode))
return -ENXIO;
xid = get_xid();
/*
* We need to be sure that all dirty pages are written as they
* might fill holes on the server.
* Note that we also MUST flush any written pages since at least
* some servers (Windows2016) will not reflect recent writes in
* QUERY_ALLOCATED_RANGES until SMB2_flush is called.
*/
wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
if (wrcfile) {
filemap_write_and_wait(inode->i_mapping);
smb2_flush_file(xid, tcon, &wrcfile->fid);
cifsFileInfo_put(wrcfile);
}
if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
if (whence == SEEK_HOLE)
offset = i_size_read(inode);
goto lseek_exit;
}
in_data.file_offset = cpu_to_le64(offset);
in_data.length = cpu_to_le64(i_size_read(inode));
rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
FSCTL_QUERY_ALLOCATED_RANGES, true,
(char *)&in_data, sizeof(in_data),
sizeof(struct file_allocated_range_buffer),
(char **)&out_data, &out_data_len);
if (rc == -E2BIG)
rc = 0;
if (rc)
goto lseek_exit;
if (whence == SEEK_HOLE && out_data_len == 0)
goto lseek_exit;
if (whence == SEEK_DATA && out_data_len == 0) {
rc = -ENXIO;
goto lseek_exit;
}
if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
rc = -EINVAL;
goto lseek_exit;
}
if (whence == SEEK_DATA) {
offset = le64_to_cpu(out_data->file_offset);
goto lseek_exit;
}
if (offset < le64_to_cpu(out_data->file_offset))
goto lseek_exit;
offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
lseek_exit:
free_xid(xid);
kfree(out_data);
if (!rc)
return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
else
return rc;
}
static int smb3_fiemap(struct cifs_tcon *tcon,
struct cifsFileInfo *cfile,
struct fiemap_extent_info *fei, u64 start, u64 len)
{
unsigned int xid;
struct file_allocated_range_buffer in_data, *out_data;
u32 out_data_len;
int i, num, rc, flags, last_blob;
u64 next;
rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
if (rc)
return rc;
xid = get_xid();
again:
in_data.file_offset = cpu_to_le64(start);
in_data.length = cpu_to_le64(len);
rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
FSCTL_QUERY_ALLOCATED_RANGES, true,
(char *)&in_data, sizeof(in_data),
1024 * sizeof(struct file_allocated_range_buffer),
(char **)&out_data, &out_data_len);
if (rc == -E2BIG) {
last_blob = 0;
rc = 0;
} else
last_blob = 1;
if (rc)
goto out;
if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
rc = -EINVAL;
goto out;
}
if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
rc = -EINVAL;
goto out;
}
num = out_data_len / sizeof(struct file_allocated_range_buffer);
for (i = 0; i < num; i++) {
flags = 0;
if (i == num - 1 && last_blob)
flags |= FIEMAP_EXTENT_LAST;
rc = fiemap_fill_next_extent(fei,
le64_to_cpu(out_data[i].file_offset),
le64_to_cpu(out_data[i].file_offset),
le64_to_cpu(out_data[i].length),
flags);
if (rc < 0)
goto out;
if (rc == 1) {
rc = 0;
goto out;
}
}
if (!last_blob) {
next = le64_to_cpu(out_data[num - 1].file_offset) +
le64_to_cpu(out_data[num - 1].length);
len = len - (next - start);
start = next;
goto again;
}
out:
free_xid(xid);
kfree(out_data);
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 == FALLOC_FL_COLLAPSE_RANGE)
return smb3_collapse_range(file, tcon, off, len);
else if (mode == FALLOC_FL_INSERT_RANGE)
return smb3_insert_range(file, tcon, off, len);
else if (mode == 0)
return smb3_simple_falloc(file, tcon, off, len, false);
return -EOPNOTSUPP;
}
static void
smb2_downgrade_oplock(struct TCP_Server_Info *server,
struct cifsInodeInfo *cinode, __u32 oplock,
unsigned int epoch, bool *purge_cache)
{
server->ops->set_oplock_level(cinode, oplock, 0, NULL);
}
static void
smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
unsigned int epoch, bool *purge_cache);
static void
smb3_downgrade_oplock(struct TCP_Server_Info *server,
struct cifsInodeInfo *cinode, __u32 oplock,
unsigned int epoch, bool *purge_cache)
{
unsigned int old_state = cinode->oplock;
unsigned int old_epoch = cinode->epoch;
unsigned int new_state;
if (epoch > old_epoch) {
smb21_set_oplock_level(cinode, oplock, 0, NULL);
cinode->epoch = epoch;
}
new_state = cinode->oplock;
*purge_cache = false;
if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
(new_state & CIFS_CACHE_READ_FLG) == 0)
*purge_cache = true;
else if (old_state == new_state && (epoch - old_epoch > 1))
*purge_cache = true;
}
static void
smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
unsigned int epoch, bool *purge_cache)
{
oplock &= 0xFF;
cinode->lease_granted = false;
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};
unsigned int new_oplock = 0;
oplock &= 0xFF;
cinode->lease_granted = true;
if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
return;
/* Check if the server granted an oplock rather than a lease */
if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
return smb2_set_oplock_level(cinode, oplock, epoch,
purge_cache);
if (oplock & SMB2_LEASE_READ_CACHING_HE) {
new_oplock |= CIFS_CACHE_READ_FLG;
strcat(message, "R");
}
if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
new_oplock |= CIFS_CACHE_HANDLE_FLG;
strcat(message, "H");
}
if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
new_oplock |= CIFS_CACHE_WRITE_FLG;
strcat(message, "W");
}
if (!new_oplock)
strncpy(message, "None", sizeof(message));
cinode->oplock = new_oplock;
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;
memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
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;
memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
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.LeaseKey, 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)->ctx->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, __le16 cipher_type)
{
struct smb2_hdr *shdr =
(struct smb2_hdr *)old_rq->rq_iov[0].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);
if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
(cipher_type == SMB2_ENCRYPTION_AES256_GCM))
get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
else
get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_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)
{
void *addr;
/*
* VMAP_STACK (at least) puts stack into the vmalloc address space
*/
if (is_vmalloc_addr(buf))
addr = vmalloc_to_page(buf);
else
addr = virt_to_page(buf);
sg_set_page(sg, addr, buflen, offset_in_page(buf));
}
/* Assumes the first rqst has a transform header as the first iov.
* I.e.
* rqst[0].rq_iov[0] is transform header
* rqst[0].rq_iov[1+] data to be encrypted/decrypted
* rqst[1+].rq_iov[0+] data to be encrypted/decrypted
*/
static struct scatterlist *
init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
{
unsigned int sg_len;
struct scatterlist *sg;
unsigned int i;
unsigned int j;
unsigned int idx = 0;
int skip;
sg_len = 1;
for (i = 0; i < num_rqst; i++)
sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
if (!sg)
return NULL;
sg_init_table(sg, sg_len);
for (i = 0; i < num_rqst; i++) {
for (j = 0; j < rqst[i].rq_nvec; j++) {
/*
* The first rqst has a transform header where the
* first 20 bytes are not part of the encrypted blob
*/
skip = (i == 0) && (j == 0) ? 20 : 0;
smb2_sg_set_buf(&sg[idx++],
rqst[i].rq_iov[j].iov_base + skip,
rqst[i].rq_iov[j].iov_len - skip);
}
for (j = 0; j < rqst[i].rq_npages; j++) {
unsigned int len, offset;
rqst_page_get_length(&rqst[i], j, &len, &offset);
sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
}
}
smb2_sg_set_buf(&sg[idx], 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(server, &cifs_tcp_ses_list, tcp_ses_list) {
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
if (ses->Suid == ses_id) {
ses_enc_key = enc ? ses->smb3encryptionkey :
ses->smb3decryptionkey;
memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
spin_unlock(&cifs_tcp_ses_lock);
return 0;
}
}
}
spin_unlock(&cifs_tcp_ses_lock);
return -EAGAIN;
}
/*
* Encrypt or decrypt @rqst message. @rqst[0] has the following format:
* iov[0] - transform header (associate data),
* iov[1-N] - SMB2 header and pages - data to encrypt.
* On success return encrypted data in iov[1-N] and pages, leave iov[0]
* untouched.
*/
static int
crypt_message(struct TCP_Server_Info *server, int num_rqst,
struct smb_rqst *rqst, int enc)
{
struct smb2_transform_hdr *tr_hdr =
(struct smb2_transform_hdr *)rqst[0].rq_iov[0].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_ENC_DEC_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, le64_to_cpu(tr_hdr->SessionId), enc, key);
if (rc) {
cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
enc ? "en" : "de");
return rc;
}
rc = smb3_crypto_aead_allocate(server);
if (rc) {
cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
return rc;
}
tfm = enc ? server->secmech.ccmaesencrypt :
server->secmech.ccmaesdecrypt;
if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
(server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
else
rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
if (rc) {
cifs_server_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_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
return rc;
}
req = aead_request_alloc(tfm, GFP_KERNEL);
if (!req) {
cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
return -ENOMEM;
}
if (!enc) {
memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
crypt_len += SMB2_SIGNATURE_SIZE;
}
sg = init_sg(num_rqst, rqst, sign);
if (!sg) {
cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
rc = -ENOMEM;
goto free_req;
}
iv_len = crypto_aead_ivsize(tfm);
iv = kzalloc(iv_len, GFP_KERNEL);
if (!iv) {
cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
rc = -ENOMEM;
goto free_sg;
}
if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
(server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
else {
iv[0] = 3;
memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_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;
}
void
smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
{
int i, j;
for (i = 0; i < num_rqst; i++) {
if (rqst[i].rq_pages) {
for (j = rqst[i].rq_npages - 1; j >= 0; j--)
put_page(rqst[i].rq_pages[j]);
kfree(rqst[i].rq_pages);
}
}
}
/*
* This function will initialize new_rq and encrypt the content.
* The first entry, new_rq[0], only contains a single iov which contains
* a smb2_transform_hdr and is pre-allocated by the caller.
* This function then populates new_rq[1+] with the content from olq_rq[0+].
*
* The end result is an array of smb_rqst structures where the first structure
* only contains a single iov for the transform header which we then can pass
* to crypt_message().
*
* new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
* new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
*/
static int
smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
struct smb_rqst *new_rq, struct smb_rqst *old_rq)
{
struct page **pages;
struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
unsigned int npages;
unsigned int orig_len = 0;
int i, j;
int rc = -ENOMEM;
for (i = 1; i < num_rqst; i++) {
npages = old_rq[i - 1].rq_npages;
pages = kmalloc_array(npages, sizeof(struct page *),
GFP_KERNEL);
if (!pages)
goto err_free;
new_rq[i].rq_pages = pages;
new_rq[i].rq_npages = npages;
new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
orig_len += smb_rqst_len(server, &old_rq[i - 1]);
for (j = 0; j < npages; j++) {
pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
if (!pages[j])
goto err_free;
}
/* copy pages form the old */
for (j = 0; j < npages; j++) {
char *dst, *src;
unsigned int offset, len;
rqst_page_get_length(&new_rq[i], j, &len, &offset);
dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
memcpy(dst, src, len);
kunmap(new_rq[i].rq_pages[j]);
kunmap(old_rq[i - 1].rq_pages[j]);
}
}
/* fill the 1st iov with a transform header */
fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
rc = crypt_message(server, num_rqst, new_rq, 1);
cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
if (rc)
goto err_free;
return rc;
err_free:
smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
return rc;
}
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,
bool is_offloaded)
{
struct kvec iov[2];
struct smb_rqst rqst = {NULL};
int rc;
iov[0].iov_base = buf;
iov[0].iov_len = sizeof(struct smb2_transform_hdr);
iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
iov[1].iov_len = buf_data_size;
rqst.rq_iov = iov;
rqst.rq_nvec = 2;
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, 1, &rqst, 0);
cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
if (rc)
return rc;
memmove(buf, iov[1].iov_base, buf_data_size);
if (!is_offloaded)
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,
bool is_offloaded)
{
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_hdr *shdr = (struct smb2_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_server_dbg(VFS, "only big read responses are supported\n");
return -ENOTSUPP;
}
if (server->ops->is_session_expired &&
server->ops->is_session_expired(buf)) {
if (!is_offloaded)
cifs_reconnect(server);
return -1;
}
if (server->ops->is_status_pending &&
server->ops->is_status_pending(buf, server))
return -1;
/* set up first two iov to get credits */
rdata->iov[0].iov_base = buf;
rdata->iov[0].iov_len = 0;
rdata->iov[1].iov_base = buf;
rdata->iov[1].iov_len =
min_t(unsigned int, buf_len, server->vals->read_rsp_size);
cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
rdata->iov[0].iov_base, rdata->iov[0].iov_len);
cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
rdata->iov[1].iov_base, rdata->iov[1].iov_len);
rdata->result = server->ops->map_error(buf, true);
if (rdata->result != 0) {
cifs_dbg(FYI, "%s: server returned error %d\n",
__func__, rdata->result);
/* normal error on read response */
if (is_offloaded)
mid->mid_state = MID_RESPONSE_RECEIVED;
else
dequeue_mid(mid, false);
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;
if (is_offloaded)
mid->mid_state = MID_RESPONSE_MALFORMED;
else
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;
if (is_offloaded)
mid->mid_state = MID_RESPONSE_MALFORMED;
else
dequeue_mid(mid, rdata->result);
return 0;
}
if (data_len > page_data_size - pad_len) {
/* data_len is corrupt -- discard frame */
rdata->result = -EIO;
if (is_offloaded)
mid->mid_state = MID_RESPONSE_MALFORMED;
else
dequeue_mid(mid, rdata->result);
return 0;
}
rdata->result = init_read_bvec(pages, npages, page_data_size,
cur_off, &bvec);
if (rdata->result != 0) {
if (is_offloaded)
mid->mid_state = MID_RESPONSE_MALFORMED;
else
dequeue_mid(mid, rdata->result);
return 0;
}
iov_iter_bvec(&iter, WRITE, 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, &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;
if (is_offloaded)
mid->mid_state = MID_RESPONSE_MALFORMED;
else
dequeue_mid(mid, rdata->result);
return 0;
}
length = rdata->copy_into_pages(server, rdata, &iter);
kfree(bvec);
if (length < 0)
return length;
if (is_offloaded)
mid->mid_state = MID_RESPONSE_RECEIVED;
else
dequeue_mid(mid, false);
return length;
}
struct smb2_decrypt_work {
struct work_struct decrypt;
struct TCP_Server_Info *server;
struct page **ppages;
char *buf;
unsigned int npages;
unsigned int len;
};
static void smb2_decrypt_offload(struct work_struct *work)
{
struct smb2_decrypt_work *dw = container_of(work,
struct smb2_decrypt_work, decrypt);
int i, rc;
struct mid_q_entry *mid;
rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
dw->ppages, dw->npages, dw->len, true);
if (rc) {
cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
goto free_pages;
}
dw->server->lstrp = jiffies;
mid = smb2_find_dequeue_mid(dw->server, dw->buf);
if (mid == NULL)
cifs_dbg(FYI, "mid not found\n");
else {
mid->decrypted = true;
rc = handle_read_data(dw->server, mid, dw->buf,
dw->server->vals->read_rsp_size,
dw->ppages, dw->npages, dw->len,
true);
if (rc >= 0) {
#ifdef CONFIG_CIFS_STATS2
mid->when_received = jiffies;
#endif
if (dw->server->ops->is_network_name_deleted)
dw->server->ops->is_network_name_deleted(dw->buf,
dw->server);
mid->callback(mid);
} else {
spin_lock(&GlobalMid_Lock);
if (dw->server->tcpStatus == CifsNeedReconnect) {
mid->mid_state = MID_RETRY_NEEDED;
spin_unlock(&GlobalMid_Lock);
mid->callback(mid);
} else {
mid->mid_state = MID_REQUEST_SUBMITTED;
mid->mid_flags &= ~(MID_DELETED);
list_add_tail(&mid->qhead,
&dw->server->pending_mid_q);
spin_unlock(&GlobalMid_Lock);
}
}
cifs_mid_q_entry_release(mid);
}
free_pages:
for (i = dw->npages-1; i >= 0; i--)
put_page(dw->ppages[i]);
kfree(dw->ppages);
cifs_small_buf_release(dw->buf);
kfree(dw);
}
static int
receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
int *num_mids)
{
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;
struct smb2_decrypt_work *dw;
*num_mids = 1;
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;
/*
* For large reads, offload to different thread for better performance,
* use more cores decrypting which can be expensive
*/
if ((server->min_offload) && (server->in_flight > 1) &&
(server->pdu_size >= server->min_offload)) {
dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
if (dw == NULL)
goto non_offloaded_decrypt;
dw->buf = server->smallbuf;
server->smallbuf = (char *)cifs_small_buf_get();
INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
dw->npages = npages;
dw->server = server;
dw->ppages = pages;
dw->len = len;
queue_work(decrypt_wq, &dw->decrypt);
*num_mids = 0; /* worker thread takes care of finding mid */
return -1;
}
non_offloaded_decrypt:
rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
pages, npages, len, false);
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, false);
if (rc >= 0) {
if (server->ops->is_network_name_deleted) {
server->ops->is_network_name_deleted(buf,
server);
}
}
}
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 **mids, char **bufs,
int *num_mids)
{
int ret, length;
char *buf = server->smallbuf;
struct smb2_hdr *shdr;
unsigned int pdu_length = server->pdu_size;
unsigned int buf_size;
struct mid_q_entry *mid_entry;
int next_is_large;
char *next_buffer = NULL;
*num_mids = 0;
/* 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, false);
if (length)
return length;
next_is_large = server->large_buf;
one_more:
shdr = (struct smb2_hdr *)buf;
if (shdr->NextCommand) {
if (next_is_large)
next_buffer = (char *)cifs_buf_get();
else
next_buffer = (char *)cifs_small_buf_get();
memcpy(next_buffer,
buf + le32_to_cpu(shdr->NextCommand),
pdu_length - le32_to_cpu(shdr->NextCommand));
}
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_entry->resp_buf_size = server->pdu_size;
}
if (*num_mids >= MAX_COMPOUND) {
cifs_server_dbg(VFS, "too many PDUs in compound\n");
return -1;
}
bufs[*num_mids] = buf;
mids[(*num_mids)++] = mid_entry;
if (mid_entry && mid_entry->handle)
ret = mid_entry->handle(server, mid_entry);
else
ret = cifs_handle_standard(server, mid_entry);
if (ret == 0 && shdr->NextCommand) {
pdu_length -= le32_to_cpu(shdr->NextCommand);
server->large_buf = next_is_large;
if (next_is_large)
server->bigbuf = buf = next_buffer;
else
server->smallbuf = buf = next_buffer;
goto one_more;
} else if (ret != 0) {
/*
* ret != 0 here means that we didn't get to handle_mid() thus
* server->smallbuf and server->bigbuf are still valid. We need
* to free next_buffer because it is not going to be used
* anywhere.
*/
if (next_is_large)
free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
else
free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
}
return ret;
}
static int
smb3_receive_transform(struct TCP_Server_Info *server,
struct mid_q_entry **mids, char **bufs, int *num_mids)
{
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_hdr)) {
cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
pdu_length);
cifs_reconnect(server);
return -ECONNABORTED;
}
if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
cifs_server_dbg(VFS, "Transform message is broken\n");
cifs_reconnect(server);
return -ECONNABORTED;
}
/* TODO: add support for compounds containing READ. */
if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
return receive_encrypted_read(server, &mids[0], num_mids);
}
return receive_encrypted_standard(server, mids, bufs, num_mids);
}
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, false);
}
static int
smb2_next_header(char *buf)
{
struct smb2_hdr *hdr = (struct smb2_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);
}
static int
smb2_make_node(unsigned int xid, struct inode *inode,
struct dentry *dentry, struct cifs_tcon *tcon,
const char *full_path, umode_t mode, dev_t dev)
{
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
int rc = -EPERM;
FILE_ALL_INFO *buf = NULL;
struct cifs_io_parms io_parms = {0};
__u32 oplock = 0;
struct cifs_fid fid;
struct cifs_open_parms oparms;
unsigned int bytes_written;
struct win_dev *pdev;
struct kvec iov[2];
/*
* Check if mounted with mount parm 'sfu' mount parm.
* SFU emulation should work with all servers, but only
* supports block and char device (no socket & fifo),
* and was used by default in earlier versions of Windows
*/
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
goto out;
/*
* TODO: Add ability to create instead via reparse point. Windows (e.g.
* their current NFS server) uses this approach to expose special files
* over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
*/
if (!S_ISCHR(mode) && !S_ISBLK(mode))
goto out;
cifs_dbg(FYI, "sfu compat create special file\n");
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
if (buf == NULL) {
rc = -ENOMEM;
goto out;
}
oparms.tcon = tcon;
oparms.cifs_sb = cifs_sb;
oparms.desired_access = GENERIC_WRITE;
oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
CREATE_OPTION_SPECIAL);
oparms.disposition = FILE_CREATE;
oparms.path = full_path;
oparms.fid = &fid;
oparms.reconnect = false;
if (tcon->ses->server->oplocks)
oplock = REQ_OPLOCK;
else
oplock = 0;
rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
if (rc)
goto out;
/*
* BB Do not bother to decode buf since no local inode yet to put
* timestamps in, but we can reuse it safely.
*/
pdev = (struct win_dev *)buf;
io_parms.pid = current->tgid;
io_parms.tcon = tcon;
io_parms.offset = 0;
io_parms.length = sizeof(struct win_dev);
iov[1].iov_base = buf;
iov[1].iov_len = sizeof(struct win_dev);
if (S_ISCHR(mode)) {
memcpy(pdev->type, "IntxCHR", 8);
pdev->major = cpu_to_le64(MAJOR(dev));
pdev->minor = cpu_to_le64(MINOR(dev));
rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
&bytes_written, iov, 1);
} else if (S_ISBLK(mode)) {
memcpy(pdev->type, "IntxBLK", 8);
pdev->major = cpu_to_le64(MAJOR(dev));
pdev->minor = cpu_to_le64(MINOR(dev));
rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
&bytes_written, iov, 1);
}
tcon->ses->server->ops->close(xid, tcon, &fid);
d_drop(dentry);
/* FIXME: add code here to set EAs */
out:
kfree(buf);
return rc;
}
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,
.revert_current_mid = smb2_revert_current_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,
.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 */
.get_acl = get_smb2_acl,
.get_acl_by_fid = get_smb2_acl_by_fid,
.set_acl = set_smb2_acl,
.next_header = smb2_next_header,
.ioctl_query_info = smb2_ioctl_query_info,
.make_node = smb2_make_node,
.fiemap = smb3_fiemap,
.llseek = smb3_llseek,
.is_status_io_timeout = smb2_is_status_io_timeout,
.is_network_name_deleted = smb2_is_network_name_deleted,
};
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,
.adjust_credits = smb2_adjust_credits,
.get_next_mid = smb2_get_next_mid,
.revert_current_mid = smb2_revert_current_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,
.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,
.notify = smb3_notify,
.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 */
.get_acl = get_smb2_acl,
.get_acl_by_fid = get_smb2_acl_by_fid,
.set_acl = set_smb2_acl,
.next_header = smb2_next_header,
.ioctl_query_info = smb2_ioctl_query_info,
.make_node = smb2_make_node,
.fiemap = smb3_fiemap,
.llseek = smb3_llseek,
.is_status_io_timeout = smb2_is_status_io_timeout,
.is_network_name_deleted = smb2_is_network_name_deleted,
};
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,
.adjust_credits = smb2_adjust_credits,
.get_next_mid = smb2_get_next_mid,
.revert_current_mid = smb2_revert_current_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 = smb3_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb3_negotiate_wsize,
.negotiate_rsize = smb3_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,
/* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
.query_reparse_tag = smb2_query_reparse_tag,
.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,
.close_getattr = smb2_close_getattr,
.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,
.notify = smb3_notify,
.init_transform_rq = smb3_init_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 */
.get_acl = get_smb2_acl,
.get_acl_by_fid = get_smb2_acl_by_fid,
.set_acl = set_smb2_acl,
.next_header = smb2_next_header,
.ioctl_query_info = smb2_ioctl_query_info,
.make_node = smb2_make_node,
.fiemap = smb3_fiemap,
.llseek = smb3_llseek,
.is_status_io_timeout = smb2_is_status_io_timeout,
.is_network_name_deleted = smb2_is_network_name_deleted,
};
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,
.adjust_credits = smb2_adjust_credits,
.get_next_mid = smb2_get_next_mid,
.revert_current_mid = smb2_revert_current_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 = smb3_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb3_negotiate_wsize,
.negotiate_rsize = smb3_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,
.query_reparse_tag = smb2_query_reparse_tag,
.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,
.posix_mkdir = smb311_posix_mkdir,
.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,
.close_getattr = smb2_close_getattr,
.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 = smb311_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,
.notify = smb3_notify,
.init_transform_rq = smb3_init_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 */
.get_acl = get_smb2_acl,
.get_acl_by_fid = get_smb2_acl_by_fid,
.set_acl = set_smb2_acl,
.next_header = smb2_next_header,
.ioctl_query_info = smb2_ioctl_query_info,
.make_node = smb2_make_node,
.fiemap = smb3_fiemap,
.llseek = smb3_llseek,
.is_status_io_timeout = smb2_is_status_io_timeout,
.is_network_name_deleted = smb2_is_network_name_deleted,
};
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_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_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 | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
.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_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 | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
.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_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 | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
.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_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 | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
.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_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 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 | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
.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_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),
};
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