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linux/fs/smb/client/smb2inode.c
Paulo Alcantara ea41367b2a smb: client: introduce SMB2_OP_QUERY_WSL_EA 
Add a new command to smb2_compound_op() for querying WSL extended
attributes from reparse points.

Signed-off-by: Paulo Alcantara <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2024-03-10 19:33:58 -05:00

1277 lines
36 KiB
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// SPDX-License-Identifier: LGPL-2.1
/*
*
* Copyright (C) International Business Machines Corp., 2002, 2011
* Etersoft, 2012
* Author(s): Pavel Shilovsky (pshilovsky@samba.org),
* Steve French (sfrench@us.ibm.com)
*
*/
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <asm/div64.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
#include "cifs_unicode.h"
#include "fscache.h"
#include "smb2glob.h"
#include "smb2pdu.h"
#include "smb2proto.h"
#include "cached_dir.h"
#include "smb2status.h"
static struct reparse_data_buffer *reparse_buf_ptr(struct kvec *iov)
{
struct reparse_data_buffer *buf;
struct smb2_ioctl_rsp *io = iov->iov_base;
u32 off, count, len;
count = le32_to_cpu(io->OutputCount);
off = le32_to_cpu(io->OutputOffset);
if (check_add_overflow(off, count, &len) || len > iov->iov_len)
return ERR_PTR(-EIO);
buf = (struct reparse_data_buffer *)((u8 *)io + off);
len = sizeof(*buf);
if (count < len || count < le16_to_cpu(buf->ReparseDataLength) + len)
return ERR_PTR(-EIO);
return buf;
}
static inline __u32 file_create_options(struct dentry *dentry)
{
struct cifsInodeInfo *ci;
if (dentry) {
ci = CIFS_I(d_inode(dentry));
if (ci->cifsAttrs & ATTR_REPARSE)
return OPEN_REPARSE_POINT;
}
return 0;
}
/* Parse owner and group from SMB3.1.1 POSIX query info */
static int parse_posix_sids(struct cifs_open_info_data *data,
struct kvec *rsp_iov)
{
struct smb2_query_info_rsp *qi = rsp_iov->iov_base;
unsigned int out_len = le32_to_cpu(qi->OutputBufferLength);
unsigned int qi_len = sizeof(data->posix_fi);
int owner_len, group_len;
u8 *sidsbuf, *sidsbuf_end;
if (out_len <= qi_len)
return -EINVAL;
sidsbuf = (u8 *)qi + le16_to_cpu(qi->OutputBufferOffset) + qi_len;
sidsbuf_end = sidsbuf + out_len - qi_len;
owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end);
if (owner_len == -1)
return -EINVAL;
memcpy(&data->posix_owner, sidsbuf, owner_len);
group_len = posix_info_sid_size(sidsbuf + owner_len, sidsbuf_end);
if (group_len == -1)
return -EINVAL;
memcpy(&data->posix_group, sidsbuf + owner_len, group_len);
return 0;
}
struct wsl_query_ea {
__le32 next;
__u8 name_len;
__u8 name[SMB2_WSL_XATTR_NAME_LEN + 1];
} __packed;
#define NEXT_OFF cpu_to_le32(sizeof(struct wsl_query_ea))
static const struct wsl_query_ea wsl_query_eas[] = {
{ .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_UID, },
{ .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_GID, },
{ .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_MODE, },
{ .next = 0, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_DEV, },
};
static int check_wsl_eas(struct kvec *rsp_iov)
{
struct smb2_file_full_ea_info *ea;
struct smb2_query_info_rsp *rsp = rsp_iov->iov_base;
unsigned long addr;
u32 outlen, next;
u16 vlen;
u8 nlen;
u8 *end;
outlen = le32_to_cpu(rsp->OutputBufferLength);
if (outlen < SMB2_WSL_MIN_QUERY_EA_RESP_SIZE ||
outlen > SMB2_WSL_MAX_QUERY_EA_RESP_SIZE)
return -EINVAL;
ea = (void *)((u8 *)rsp_iov->iov_base +
le16_to_cpu(rsp->OutputBufferOffset));
end = (u8 *)rsp_iov->iov_base + rsp_iov->iov_len;
for (;;) {
if ((u8 *)ea > end - sizeof(*ea))
return -EINVAL;
nlen = ea->ea_name_length;
vlen = le16_to_cpu(ea->ea_value_length);
if (nlen != SMB2_WSL_XATTR_NAME_LEN ||
(u8 *)ea + nlen + 1 + vlen > end)
return -EINVAL;
switch (vlen) {
case 4:
if (strncmp(ea->ea_data, SMB2_WSL_XATTR_UID, nlen) &&
strncmp(ea->ea_data, SMB2_WSL_XATTR_GID, nlen) &&
strncmp(ea->ea_data, SMB2_WSL_XATTR_MODE, nlen))
return -EINVAL;
break;
case 8:
if (strncmp(ea->ea_data, SMB2_WSL_XATTR_DEV, nlen))
return -EINVAL;
break;
case 0:
if (!strncmp(ea->ea_data, SMB2_WSL_XATTR_UID, nlen) ||
!strncmp(ea->ea_data, SMB2_WSL_XATTR_GID, nlen) ||
!strncmp(ea->ea_data, SMB2_WSL_XATTR_MODE, nlen) ||
!strncmp(ea->ea_data, SMB2_WSL_XATTR_DEV, nlen))
break;
fallthrough;
default:
return -EINVAL;
}
next = le32_to_cpu(ea->next_entry_offset);
if (!next)
break;
if (!IS_ALIGNED(next, 4) ||
check_add_overflow((unsigned long)ea, next, &addr))
return -EINVAL;
ea = (void *)addr;
}
return 0;
}
/*
* note: If cfile is passed, the reference to it is dropped here.
* So make sure that you do not reuse cfile after return from this func.
*
* If passing @out_iov and @out_buftype, ensure to make them both large enough
* (>= 3) to hold all compounded responses. Caller is also responsible for
* freeing them up with free_rsp_buf().
*/
static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path,
struct cifs_open_parms *oparms, struct kvec *in_iov,
int *cmds, int num_cmds, struct cifsFileInfo *cfile,
struct kvec *out_iov, int *out_buftype, struct dentry *dentry)
{
struct reparse_data_buffer *rbuf;
struct smb2_compound_vars *vars = NULL;
struct kvec *rsp_iov, *iov;
struct smb_rqst *rqst;
int rc;
__le16 *utf16_path = NULL;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_fid fid;
struct cifs_ses *ses = tcon->ses;
struct TCP_Server_Info *server;
int num_rqst = 0, i;
int resp_buftype[MAX_COMPOUND];
struct smb2_query_info_rsp *qi_rsp = NULL;
struct cifs_open_info_data *idata;
struct inode *inode = NULL;
int flags = 0;
__u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
unsigned int size[2];
void *data[2];
unsigned int len;
int retries = 0, cur_sleep = 1;
replay_again:
/* reinitialize for possible replay */
flags = 0;
oplock = SMB2_OPLOCK_LEVEL_NONE;
num_rqst = 0;
server = cifs_pick_channel(ses);
vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
if (vars == NULL)
return -ENOMEM;
rqst = &vars->rqst[0];
rsp_iov = &vars->rsp_iov[0];
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
for (i = 0; i < ARRAY_SIZE(resp_buftype); i++)
resp_buftype[i] = CIFS_NO_BUFFER;
/* We already have a handle so we can skip the open */
if (cfile)
goto after_open;
/* Open */
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
if (!utf16_path) {
rc = -ENOMEM;
goto finished;
}
/* if there is an existing lease, reuse it */
/*
* note: files with hardlinks cause unexpected behaviour. As per MS-SMB2,
* lease keys are associated with the filepath. We are maintaining lease keys
* with the inode on the client. If the file has hardlinks, it is possible
* that the lease for a file be reused for an operation on its hardlink or
* vice versa.
* As a workaround, send request using an existing lease key and if the server
* returns STATUS_INVALID_PARAMETER, which maps to EINVAL, send the request
* again without the lease.
*/
if (dentry) {
inode = d_inode(dentry);
if (CIFS_I(inode)->lease_granted && server->ops->get_lease_key) {
oplock = SMB2_OPLOCK_LEVEL_LEASE;
server->ops->get_lease_key(inode, &fid);
}
}
vars->oparms = *oparms;
vars->oparms.fid = &fid;
rqst[num_rqst].rq_iov = &vars->open_iov[0];
rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
rc = SMB2_open_init(tcon, server,
&rqst[num_rqst], &oplock, &vars->oparms,
utf16_path);
kfree(utf16_path);
if (rc)
goto finished;
smb2_set_next_command(tcon, &rqst[num_rqst]);
after_open:
num_rqst++;
rc = 0;
for (i = 0; i < num_cmds; i++) {
/* Operation */
switch (cmds[i]) {
case SMB2_OP_QUERY_INFO:
rqst[num_rqst].rq_iov = &vars->qi_iov;
rqst[num_rqst].rq_nvec = 1;
if (cfile) {
rc = SMB2_query_info_init(tcon, server,
&rqst[num_rqst],
cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
FILE_ALL_INFORMATION,
SMB2_O_INFO_FILE, 0,
sizeof(struct smb2_file_all_info) +
PATH_MAX * 2, 0, NULL);
} else {
rc = SMB2_query_info_init(tcon, server,
&rqst[num_rqst],
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 && (!cfile || num_rqst > 1)) {
smb2_set_next_command(tcon, &rqst[num_rqst]);
smb2_set_related(&rqst[num_rqst]);
} else if (rc) {
goto finished;
}
num_rqst++;
trace_smb3_query_info_compound_enter(xid, ses->Suid,
tcon->tid, full_path);
break;
case SMB2_OP_POSIX_QUERY_INFO:
rqst[num_rqst].rq_iov = &vars->qi_iov;
rqst[num_rqst].rq_nvec = 1;
if (cfile) {
/* TBD: fix following to allow for longer SIDs */
rc = SMB2_query_info_init(tcon, server,
&rqst[num_rqst],
cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
SMB_FIND_FILE_POSIX_INFO,
SMB2_O_INFO_FILE, 0,
sizeof(struct smb311_posix_qinfo *) +
(PATH_MAX * 2) +
(sizeof(struct cifs_sid) * 2), 0, NULL);
} else {
rc = SMB2_query_info_init(tcon, server,
&rqst[num_rqst],
COMPOUND_FID,
COMPOUND_FID,
SMB_FIND_FILE_POSIX_INFO,
SMB2_O_INFO_FILE, 0,
sizeof(struct smb311_posix_qinfo *) +
(PATH_MAX * 2) +
(sizeof(struct cifs_sid) * 2), 0, NULL);
}
if (!rc && (!cfile || num_rqst > 1)) {
smb2_set_next_command(tcon, &rqst[num_rqst]);
smb2_set_related(&rqst[num_rqst]);
} else if (rc) {
goto finished;
}
num_rqst++;
trace_smb3_posix_query_info_compound_enter(xid, ses->Suid,
tcon->tid, full_path);
break;
case SMB2_OP_DELETE:
trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
break;
case SMB2_OP_MKDIR:
/*
* Directories are created through parameters in the
* SMB2_open() call.
*/
trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
break;
case SMB2_OP_RMDIR:
rqst[num_rqst].rq_iov = &vars->si_iov[0];
rqst[num_rqst].rq_nvec = 1;
size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
data[0] = &delete_pending[0];
rc = SMB2_set_info_init(tcon, server,
&rqst[num_rqst], COMPOUND_FID,
COMPOUND_FID, current->tgid,
FILE_DISPOSITION_INFORMATION,
SMB2_O_INFO_FILE, 0, data, size);
if (rc)
goto finished;
smb2_set_next_command(tcon, &rqst[num_rqst]);
smb2_set_related(&rqst[num_rqst++]);
trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
break;
case SMB2_OP_SET_EOF:
rqst[num_rqst].rq_iov = &vars->si_iov[0];
rqst[num_rqst].rq_nvec = 1;
size[0] = in_iov[i].iov_len;
data[0] = in_iov[i].iov_base;
if (cfile) {
rc = SMB2_set_info_init(tcon, server,
&rqst[num_rqst],
cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
current->tgid,
FILE_END_OF_FILE_INFORMATION,
SMB2_O_INFO_FILE, 0,
data, size);
} else {
rc = SMB2_set_info_init(tcon, server,
&rqst[num_rqst],
COMPOUND_FID,
COMPOUND_FID,
current->tgid,
FILE_END_OF_FILE_INFORMATION,
SMB2_O_INFO_FILE, 0,
data, size);
}
if (!rc && (!cfile || num_rqst > 1)) {
smb2_set_next_command(tcon, &rqst[num_rqst]);
smb2_set_related(&rqst[num_rqst]);
} else if (rc) {
goto finished;
}
num_rqst++;
trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
break;
case SMB2_OP_SET_INFO:
rqst[num_rqst].rq_iov = &vars->si_iov[0];
rqst[num_rqst].rq_nvec = 1;
size[0] = in_iov[i].iov_len;
data[0] = in_iov[i].iov_base;
if (cfile) {
rc = SMB2_set_info_init(tcon, server,
&rqst[num_rqst],
cfile->fid.persistent_fid,
cfile->fid.volatile_fid, current->tgid,
FILE_BASIC_INFORMATION,
SMB2_O_INFO_FILE, 0, data, size);
} else {
rc = SMB2_set_info_init(tcon, server,
&rqst[num_rqst],
COMPOUND_FID,
COMPOUND_FID, current->tgid,
FILE_BASIC_INFORMATION,
SMB2_O_INFO_FILE, 0, data, size);
}
if (!rc && (!cfile || num_rqst > 1)) {
smb2_set_next_command(tcon, &rqst[num_rqst]);
smb2_set_related(&rqst[num_rqst]);
} else if (rc) {
goto finished;
}
num_rqst++;
trace_smb3_set_info_compound_enter(xid, ses->Suid,
tcon->tid, full_path);
break;
case SMB2_OP_RENAME:
rqst[num_rqst].rq_iov = &vars->si_iov[0];
rqst[num_rqst].rq_nvec = 2;
len = in_iov[i].iov_len;
vars->rename_info.ReplaceIfExists = 1;
vars->rename_info.RootDirectory = 0;
vars->rename_info.FileNameLength = cpu_to_le32(len);
size[0] = sizeof(struct smb2_file_rename_info);
data[0] = &vars->rename_info;
size[1] = len + 2 /* null */;
data[1] = in_iov[i].iov_base;
if (cfile) {
rc = SMB2_set_info_init(tcon, server,
&rqst[num_rqst],
cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
current->tgid, FILE_RENAME_INFORMATION,
SMB2_O_INFO_FILE, 0, data, size);
} else {
rc = SMB2_set_info_init(tcon, server,
&rqst[num_rqst],
COMPOUND_FID, COMPOUND_FID,
current->tgid, FILE_RENAME_INFORMATION,
SMB2_O_INFO_FILE, 0, data, size);
}
if (!rc && (!cfile || num_rqst > 1)) {
smb2_set_next_command(tcon, &rqst[num_rqst]);
smb2_set_related(&rqst[num_rqst]);
} else if (rc) {
goto finished;
}
num_rqst++;
trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
break;
case SMB2_OP_HARDLINK:
rqst[num_rqst].rq_iov = &vars->si_iov[0];
rqst[num_rqst].rq_nvec = 2;
len = in_iov[i].iov_len;
vars->link_info.ReplaceIfExists = 0;
vars->link_info.RootDirectory = 0;
vars->link_info.FileNameLength = cpu_to_le32(len);
size[0] = sizeof(struct smb2_file_link_info);
data[0] = &vars->link_info;
size[1] = len + 2 /* null */;
data[1] = in_iov[i].iov_base;
rc = SMB2_set_info_init(tcon, server,
&rqst[num_rqst], COMPOUND_FID,
COMPOUND_FID, current->tgid,
FILE_LINK_INFORMATION,
SMB2_O_INFO_FILE, 0, data, size);
if (rc)
goto finished;
smb2_set_next_command(tcon, &rqst[num_rqst]);
smb2_set_related(&rqst[num_rqst++]);
trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
break;
case SMB2_OP_SET_REPARSE:
rqst[num_rqst].rq_iov = vars->io_iov;
rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
if (cfile) {
rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
FSCTL_SET_REPARSE_POINT,
in_iov[i].iov_base,
in_iov[i].iov_len, 0);
} else {
rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
COMPOUND_FID, COMPOUND_FID,
FSCTL_SET_REPARSE_POINT,
in_iov[i].iov_base,
in_iov[i].iov_len, 0);
}
if (!rc && (!cfile || num_rqst > 1)) {
smb2_set_next_command(tcon, &rqst[num_rqst]);
smb2_set_related(&rqst[num_rqst]);
} else if (rc) {
goto finished;
}
num_rqst++;
trace_smb3_set_reparse_compound_enter(xid, ses->Suid,
tcon->tid, full_path);
break;
case SMB2_OP_GET_REPARSE:
rqst[num_rqst].rq_iov = vars->io_iov;
rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
if (cfile) {
rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
FSCTL_GET_REPARSE_POINT,
NULL, 0, CIFSMaxBufSize);
} else {
rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
COMPOUND_FID, COMPOUND_FID,
FSCTL_GET_REPARSE_POINT,
NULL, 0, CIFSMaxBufSize);
}
if (!rc && (!cfile || num_rqst > 1)) {
smb2_set_next_command(tcon, &rqst[num_rqst]);
smb2_set_related(&rqst[num_rqst]);
} else if (rc) {
goto finished;
}
num_rqst++;
trace_smb3_get_reparse_compound_enter(xid, ses->Suid,
tcon->tid, full_path);
break;
case SMB2_OP_QUERY_WSL_EA:
rqst[num_rqst].rq_iov = &vars->ea_iov;
rqst[num_rqst].rq_nvec = 1;
if (cfile) {
rc = SMB2_query_info_init(tcon, server,
&rqst[num_rqst],
cfile->fid.persistent_fid,
cfile->fid.volatile_fid,
FILE_FULL_EA_INFORMATION,
SMB2_O_INFO_FILE, 0,
SMB2_WSL_MAX_QUERY_EA_RESP_SIZE,
sizeof(wsl_query_eas),
(void *)wsl_query_eas);
} else {
rc = SMB2_query_info_init(tcon, server,
&rqst[num_rqst],
COMPOUND_FID,
COMPOUND_FID,
FILE_FULL_EA_INFORMATION,
SMB2_O_INFO_FILE, 0,
SMB2_WSL_MAX_QUERY_EA_RESP_SIZE,
sizeof(wsl_query_eas),
(void *)wsl_query_eas);
}
if (!rc && (!cfile || num_rqst > 1)) {
smb2_set_next_command(tcon, &rqst[num_rqst]);
smb2_set_related(&rqst[num_rqst]);
} else if (rc) {
goto finished;
}
num_rqst++;
break;
default:
cifs_dbg(VFS, "Invalid command\n");
rc = -EINVAL;
}
}
if (rc)
goto finished;
/* We already have a handle so we can skip the close */
if (cfile)
goto after_close;
/* Close */
flags |= CIFS_CP_CREATE_CLOSE_OP;
rqst[num_rqst].rq_iov = &vars->close_iov;
rqst[num_rqst].rq_nvec = 1;
rc = SMB2_close_init(tcon, server,
&rqst[num_rqst], COMPOUND_FID,
COMPOUND_FID, false);
smb2_set_related(&rqst[num_rqst]);
if (rc)
goto finished;
after_close:
num_rqst++;
if (cfile) {
if (retries)
for (i = 1; i < num_rqst - 2; i++)
smb2_set_replay(server, &rqst[i]);
rc = compound_send_recv(xid, ses, server,
flags, num_rqst - 2,
&rqst[1], &resp_buftype[1],
&rsp_iov[1]);
} else {
if (retries)
for (i = 0; i < num_rqst; i++)
smb2_set_replay(server, &rqst[i]);
rc = compound_send_recv(xid, ses, server,
flags, num_rqst,
rqst, resp_buftype,
rsp_iov);
}
finished:
num_rqst = 0;
SMB2_open_free(&rqst[num_rqst++]);
if (rc == -EREMCHG) {
pr_warn_once("server share %s deleted\n", tcon->tree_name);
tcon->need_reconnect = true;
}
for (i = 0; i < num_cmds; i++) {
switch (cmds[i]) {
case SMB2_OP_QUERY_INFO:
idata = in_iov[i].iov_base;
if (rc == 0 && cfile && cfile->symlink_target) {
idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
if (!idata->symlink_target)
rc = -ENOMEM;
}
if (rc == 0) {
qi_rsp = (struct smb2_query_info_rsp *)
rsp_iov[i + 1].iov_base;
rc = smb2_validate_and_copy_iov(
le16_to_cpu(qi_rsp->OutputBufferOffset),
le32_to_cpu(qi_rsp->OutputBufferLength),
&rsp_iov[i + 1], sizeof(idata->fi), (char *)&idata->fi);
}
SMB2_query_info_free(&rqst[num_rqst++]);
if (rc)
trace_smb3_query_info_compound_err(xid, ses->Suid,
tcon->tid, rc);
else
trace_smb3_query_info_compound_done(xid, ses->Suid,
tcon->tid);
break;
case SMB2_OP_POSIX_QUERY_INFO:
idata = in_iov[i].iov_base;
if (rc == 0 && cfile && cfile->symlink_target) {
idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
if (!idata->symlink_target)
rc = -ENOMEM;
}
if (rc == 0) {
qi_rsp = (struct smb2_query_info_rsp *)
rsp_iov[i + 1].iov_base;
rc = smb2_validate_and_copy_iov(
le16_to_cpu(qi_rsp->OutputBufferOffset),
le32_to_cpu(qi_rsp->OutputBufferLength),
&rsp_iov[i + 1], sizeof(idata->posix_fi) /* add SIDs */,
(char *)&idata->posix_fi);
}
if (rc == 0)
rc = parse_posix_sids(idata, &rsp_iov[i + 1]);
SMB2_query_info_free(&rqst[num_rqst++]);
if (rc)
trace_smb3_posix_query_info_compound_err(xid, ses->Suid,
tcon->tid, rc);
else
trace_smb3_posix_query_info_compound_done(xid, ses->Suid,
tcon->tid);
break;
case SMB2_OP_DELETE:
if (rc)
trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc);
else {
/*
* If dentry (hence, inode) is NULL, lease break is going to
* take care of degrading leases on handles for deleted files.
*/
if (inode)
cifs_mark_open_handles_for_deleted_file(inode, full_path);
trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
}
break;
case SMB2_OP_MKDIR:
if (rc)
trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc);
else
trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
break;
case SMB2_OP_HARDLINK:
if (rc)
trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc);
else
trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
SMB2_set_info_free(&rqst[num_rqst++]);
break;
case SMB2_OP_RENAME:
if (rc)
trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc);
else
trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
SMB2_set_info_free(&rqst[num_rqst++]);
break;
case SMB2_OP_RMDIR:
if (rc)
trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc);
else
trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
SMB2_set_info_free(&rqst[num_rqst++]);
break;
case SMB2_OP_SET_EOF:
if (rc)
trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc);
else
trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
SMB2_set_info_free(&rqst[num_rqst++]);
break;
case SMB2_OP_SET_INFO:
if (rc)
trace_smb3_set_info_compound_err(xid, ses->Suid,
tcon->tid, rc);
else
trace_smb3_set_info_compound_done(xid, ses->Suid,
tcon->tid);
SMB2_set_info_free(&rqst[num_rqst++]);
break;
case SMB2_OP_SET_REPARSE:
if (rc) {
trace_smb3_set_reparse_compound_err(xid, ses->Suid,
tcon->tid, rc);
} else {
trace_smb3_set_reparse_compound_done(xid, ses->Suid,
tcon->tid);
}
SMB2_ioctl_free(&rqst[num_rqst++]);
break;
case SMB2_OP_GET_REPARSE:
if (!rc) {
iov = &rsp_iov[i + 1];
idata = in_iov[i].iov_base;
idata->reparse.io.iov = *iov;
idata->reparse.io.buftype = resp_buftype[i + 1];
rbuf = reparse_buf_ptr(iov);
if (IS_ERR(rbuf)) {
rc = PTR_ERR(rbuf);
trace_smb3_set_reparse_compound_err(xid, ses->Suid,
tcon->tid, rc);
} else {
idata->reparse.tag = le32_to_cpu(rbuf->ReparseTag);
trace_smb3_set_reparse_compound_done(xid, ses->Suid,
tcon->tid);
}
memset(iov, 0, sizeof(*iov));
resp_buftype[i + 1] = CIFS_NO_BUFFER;
} else {
trace_smb3_set_reparse_compound_err(xid, ses->Suid,
tcon->tid, rc);
}
SMB2_ioctl_free(&rqst[num_rqst++]);
break;
case SMB2_OP_QUERY_WSL_EA:
if (!rc) {
idata = in_iov[i].iov_base;
qi_rsp = rsp_iov[i + 1].iov_base;
data[0] = (u8 *)qi_rsp + le16_to_cpu(qi_rsp->OutputBufferOffset);
size[0] = le32_to_cpu(qi_rsp->OutputBufferLength);
rc = check_wsl_eas(&rsp_iov[i + 1]);
if (!rc) {
memcpy(idata->wsl.eas, data[0], size[0]);
idata->wsl.eas_len = size[0];
}
}
if (!rc) {
trace_smb3_query_wsl_ea_compound_done(xid, ses->Suid,
tcon->tid);
} else {
trace_smb3_query_wsl_ea_compound_err(xid, ses->Suid,
tcon->tid, rc);
}
SMB2_query_info_free(&rqst[num_rqst++]);
break;
}
}
SMB2_close_free(&rqst[num_rqst]);
num_cmds += 2;
if (out_iov && out_buftype) {
memcpy(out_iov, rsp_iov, num_cmds * sizeof(*out_iov));
memcpy(out_buftype, resp_buftype,
num_cmds * sizeof(*out_buftype));
} else {
for (i = 0; i < num_cmds; i++)
free_rsp_buf(resp_buftype[i], rsp_iov[i].iov_base);
}
num_cmds -= 2; /* correct num_cmds as there could be a retry */
kfree(vars);
if (is_replayable_error(rc) &&
smb2_should_replay(tcon, &retries, &cur_sleep))
goto replay_again;
if (cfile)
cifsFileInfo_put(cfile);
return rc;
}
static int parse_create_response(struct cifs_open_info_data *data,
struct cifs_sb_info *cifs_sb,
const struct kvec *iov)
{
struct smb2_create_rsp *rsp = iov->iov_base;
bool reparse_point = false;
u32 tag = 0;
int rc = 0;
switch (rsp->hdr.Status) {
case STATUS_IO_REPARSE_TAG_NOT_HANDLED:
reparse_point = true;
break;
case STATUS_STOPPED_ON_SYMLINK:
rc = smb2_parse_symlink_response(cifs_sb, iov,
&data->symlink_target);
if (rc)
return rc;
tag = IO_REPARSE_TAG_SYMLINK;
reparse_point = true;
break;
case STATUS_SUCCESS:
reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT);
break;
}
data->reparse_point = reparse_point;
data->reparse.tag = tag;
return rc;
}
int smb2_query_path_info(const unsigned int xid,
struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb,
const char *full_path,
struct cifs_open_info_data *data)
{
struct cifs_open_parms oparms;
__u32 create_options = 0;
struct cifsFileInfo *cfile;
struct cached_fid *cfid = NULL;
struct smb2_hdr *hdr;
struct kvec in_iov[3], out_iov[3] = {};
int out_buftype[3] = {};
int cmds[3];
bool islink;
int i, num_cmds = 0;
int rc, rc2;
data->adjust_tz = false;
data->reparse_point = false;
/*
* BB TODO: Add support for using cached root handle in SMB3.1.1 POSIX.
* Create SMB2_query_posix_info worker function to do non-compounded
* query when we already have an open file handle for this. For now this
* is fast enough (always using the compounded version).
*/
if (!tcon->posix_extensions) {
if (*full_path) {
rc = -ENOENT;
} else {
rc = open_cached_dir(xid, tcon, full_path,
cifs_sb, false, &cfid);
}
/* If it is a root and its handle is cached then use it */
if (!rc) {
if (cfid->file_all_info_is_valid) {
memcpy(&data->fi, &cfid->file_all_info,
sizeof(data->fi));
} else {
rc = SMB2_query_info(xid, tcon,
cfid->fid.persistent_fid,
cfid->fid.volatile_fid,
&data->fi);
}
close_cached_dir(cfid);
return rc;
}
cmds[num_cmds++] = SMB2_OP_QUERY_INFO;
} else {
cmds[num_cmds++] = SMB2_OP_POSIX_QUERY_INFO;
}
in_iov[0].iov_base = data;
in_iov[0].iov_len = sizeof(*data);
in_iov[1] = in_iov[0];
in_iov[2] = in_iov[0];
cifs_get_readable_path(tcon, full_path, &cfile);
oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_READ_ATTRIBUTES,
FILE_OPEN, create_options, ACL_NO_MODE);
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
&oparms, in_iov, cmds, num_cmds,
cfile, out_iov, out_buftype, NULL);
hdr = out_iov[0].iov_base;
/*
* If first iov is unset, then SMB session was dropped or we've got a
* cached open file (@cfile).
*/
if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
goto out;
switch (rc) {
case 0:
case -EOPNOTSUPP:
/*
* BB TODO: When support for special files added to Samba
* re-verify this path.
*/
rc = parse_create_response(data, cifs_sb, &out_iov[0]);
if (rc || !data->reparse_point)
goto out;
cmds[num_cmds++] = SMB2_OP_QUERY_WSL_EA;
/*
* Skip SMB2_OP_GET_REPARSE if symlink already parsed in create
* response.
*/
if (data->reparse.tag != IO_REPARSE_TAG_SYMLINK)
cmds[num_cmds++] = SMB2_OP_GET_REPARSE;
oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
FILE_READ_ATTRIBUTES | FILE_READ_EA,
FILE_OPEN, create_options |
OPEN_REPARSE_POINT, ACL_NO_MODE);
cifs_get_readable_path(tcon, full_path, &cfile);
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
&oparms, in_iov, cmds, num_cmds,
cfile, NULL, NULL, NULL);
break;
case -EREMOTE:
break;
default:
if (hdr->Status != STATUS_OBJECT_NAME_INVALID)
break;
rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
full_path, &islink);
if (rc2) {
rc = rc2;
goto out;
}
if (islink)
rc = -EREMOTE;
}
out:
for (i = 0; i < ARRAY_SIZE(out_buftype); i++)
free_rsp_buf(out_buftype[i], out_iov[i].iov_base);
return rc;
}
int
smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
struct cifs_tcon *tcon, const char *name,
struct cifs_sb_info *cifs_sb)
{
struct cifs_open_parms oparms;
oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES,
FILE_CREATE, CREATE_NOT_FILE, mode);
return smb2_compound_op(xid, tcon, cifs_sb,
name, &oparms, NULL,
&(int){SMB2_OP_MKDIR}, 1,
NULL, NULL, NULL, NULL);
}
void
smb2_mkdir_setinfo(struct inode *inode, const char *name,
struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
const unsigned int xid)
{
struct cifs_open_parms oparms;
FILE_BASIC_INFO data = {};
struct cifsInodeInfo *cifs_i;
struct cifsFileInfo *cfile;
struct kvec in_iov;
u32 dosattrs;
int tmprc;
in_iov.iov_base = &data;
in_iov.iov_len = sizeof(data);
cifs_i = CIFS_I(inode);
dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
data.Attributes = cpu_to_le32(dosattrs);
cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES,
FILE_CREATE, CREATE_NOT_FILE, ACL_NO_MODE);
tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
&oparms, &in_iov,
&(int){SMB2_OP_SET_INFO}, 1,
cfile, NULL, NULL, NULL);
if (tmprc == 0)
cifs_i->cifsAttrs = dosattrs;
}
int
smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
struct cifs_sb_info *cifs_sb)
{
struct cifs_open_parms oparms;
drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
oparms = CIFS_OPARMS(cifs_sb, tcon, name, DELETE,
FILE_OPEN, CREATE_NOT_FILE, ACL_NO_MODE);
return smb2_compound_op(xid, tcon, cifs_sb,
name, &oparms, NULL,
&(int){SMB2_OP_RMDIR}, 1,
NULL, NULL, NULL, NULL);
}
int
smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
struct cifs_sb_info *cifs_sb, struct dentry *dentry)
{
struct cifs_open_parms oparms;
oparms = CIFS_OPARMS(cifs_sb, tcon, name,
DELETE, FILE_OPEN,
CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
ACL_NO_MODE);
int rc = smb2_compound_op(xid, tcon, cifs_sb, name, &oparms,
NULL, &(int){SMB2_OP_DELETE}, 1,
NULL, NULL, NULL, dentry);
if (rc == -EINVAL) {
cifs_dbg(FYI, "invalid lease key, resending request without lease");
rc = smb2_compound_op(xid, tcon, cifs_sb, name, &oparms,
NULL, &(int){SMB2_OP_DELETE}, 1,
NULL, NULL, NULL, NULL);
}
return rc;
}
static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
const char *from_name, const char *to_name,
struct cifs_sb_info *cifs_sb,
__u32 create_options, __u32 access,
int command, struct cifsFileInfo *cfile,
struct dentry *dentry)
{
struct cifs_open_parms oparms;
struct kvec in_iov;
__le16 *smb2_to_name = NULL;
int rc;
smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
if (smb2_to_name == NULL) {
rc = -ENOMEM;
goto smb2_rename_path;
}
in_iov.iov_base = smb2_to_name;
in_iov.iov_len = 2 * UniStrnlen((wchar_t *)smb2_to_name, PATH_MAX);
oparms = CIFS_OPARMS(cifs_sb, tcon, from_name, access, FILE_OPEN,
create_options, ACL_NO_MODE);
rc = smb2_compound_op(xid, tcon, cifs_sb, from_name,
&oparms, &in_iov, &command, 1,
cfile, NULL, NULL, dentry);
smb2_rename_path:
kfree(smb2_to_name);
return rc;
}
int smb2_rename_path(const unsigned int xid,
struct cifs_tcon *tcon,
struct dentry *source_dentry,
const char *from_name, const char *to_name,
struct cifs_sb_info *cifs_sb)
{
struct cifsFileInfo *cfile;
__u32 co = file_create_options(source_dentry);
drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
int rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
co, DELETE, SMB2_OP_RENAME, cfile, source_dentry);
if (rc == -EINVAL) {
cifs_dbg(FYI, "invalid lease key, resending request without lease");
rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
co, DELETE, SMB2_OP_RENAME, cfile, NULL);
}
return rc;
}
int smb2_create_hardlink(const unsigned int xid,
struct cifs_tcon *tcon,
struct dentry *source_dentry,
const char *from_name, const char *to_name,
struct cifs_sb_info *cifs_sb)
{
__u32 co = file_create_options(source_dentry);
return smb2_set_path_attr(xid, tcon, from_name, to_name,
cifs_sb, co, FILE_READ_ATTRIBUTES,
SMB2_OP_HARDLINK, NULL, NULL);
}
int
smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
const char *full_path, __u64 size,
struct cifs_sb_info *cifs_sb, bool set_alloc,
struct dentry *dentry)
{
struct cifs_open_parms oparms;
struct cifsFileInfo *cfile;
struct kvec in_iov;
__le64 eof = cpu_to_le64(size);
int rc;
in_iov.iov_base = &eof;
in_iov.iov_len = sizeof(eof);
cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_DATA,
FILE_OPEN, 0, ACL_NO_MODE);
rc = smb2_compound_op(xid, tcon, cifs_sb,
full_path, &oparms, &in_iov,
&(int){SMB2_OP_SET_EOF}, 1,
cfile, NULL, NULL, dentry);
if (rc == -EINVAL) {
cifs_dbg(FYI, "invalid lease key, resending request without lease");
rc = smb2_compound_op(xid, tcon, cifs_sb,
full_path, &oparms, &in_iov,
&(int){SMB2_OP_SET_EOF}, 1,
cfile, NULL, NULL, NULL);
}
return rc;
}
int
smb2_set_file_info(struct inode *inode, const char *full_path,
FILE_BASIC_INFO *buf, const unsigned int xid)
{
struct cifs_open_parms oparms;
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct tcon_link *tlink;
struct cifs_tcon *tcon;
struct cifsFileInfo *cfile;
struct kvec in_iov = { .iov_base = buf, .iov_len = sizeof(*buf), };
int rc;
if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
(buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
(buf->Attributes == 0))
return 0; /* would be a no op, no sense sending this */
tlink = cifs_sb_tlink(cifs_sb);
if (IS_ERR(tlink))
return PTR_ERR(tlink);
tcon = tlink_tcon(tlink);
cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_ATTRIBUTES,
FILE_OPEN, 0, ACL_NO_MODE);
rc = smb2_compound_op(xid, tcon, cifs_sb,
full_path, &oparms, &in_iov,
&(int){SMB2_OP_SET_INFO}, 1,
cfile, NULL, NULL, NULL);
cifs_put_tlink(tlink);
return rc;
}
struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data,
struct super_block *sb,
const unsigned int xid,
struct cifs_tcon *tcon,
const char *full_path,
struct kvec *reparse_iov,
struct kvec *xattr_iov)
{
struct cifs_open_parms oparms;
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
struct cifsFileInfo *cfile;
struct inode *new = NULL;
struct kvec in_iov[2];
int cmds[2];
int rc;
oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
SYNCHRONIZE | DELETE |
FILE_READ_ATTRIBUTES |
FILE_WRITE_ATTRIBUTES,
FILE_CREATE,
CREATE_NOT_DIR | OPEN_REPARSE_POINT,
ACL_NO_MODE);
if (xattr_iov)
oparms.ea_cctx = xattr_iov;
cmds[0] = SMB2_OP_SET_REPARSE;
in_iov[0] = *reparse_iov;
in_iov[1].iov_base = data;
in_iov[1].iov_len = sizeof(*data);
if (tcon->posix_extensions) {
cmds[1] = SMB2_OP_POSIX_QUERY_INFO;
cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms,
in_iov, cmds, 2, cfile, NULL, NULL, NULL);
if (!rc) {
rc = smb311_posix_get_inode_info(&new, full_path,
data, sb, xid);
}
} else {
cmds[1] = SMB2_OP_QUERY_INFO;
cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms,
in_iov, cmds, 2, cfile, NULL, NULL, NULL);
if (!rc) {
rc = cifs_get_inode_info(&new, full_path,
data, sb, xid, NULL);
}
}
return rc ? ERR_PTR(rc) : new;
}
int smb2_query_reparse_point(const unsigned int xid,
struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb,
const char *full_path,
u32 *tag, struct kvec *rsp,
int *rsp_buftype)
{
struct cifs_open_parms oparms;
struct cifs_open_info_data data = {};
struct cifsFileInfo *cfile;
struct kvec in_iov = { .iov_base = &data, .iov_len = sizeof(data), };
int rc;
cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
cifs_get_readable_path(tcon, full_path, &cfile);
oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_READ_ATTRIBUTES,
FILE_OPEN, OPEN_REPARSE_POINT, ACL_NO_MODE);
rc = smb2_compound_op(xid, tcon, cifs_sb,
full_path, &oparms, &in_iov,
&(int){SMB2_OP_GET_REPARSE}, 1,
cfile, NULL, NULL, NULL);
if (rc)
goto out;
*tag = data.reparse.tag;
*rsp = data.reparse.io.iov;
*rsp_buftype = data.reparse.io.buftype;
memset(&data.reparse.io.iov, 0, sizeof(data.reparse.io.iov));
data.reparse.io.buftype = CIFS_NO_BUFFER;
out:
cifs_free_open_info(&data);
return rc;
}
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