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cifs: add passthrough for smb2 setinfo

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Add support to send smb2 set-info commands from userspace.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Paulo Alcantara <palcantara@suse.de>
This commit is contained in:
Ronnie Sahlberg 2019-07-25 13:08:43 +10:00 committed by Steve French
parent 86e14e1205
commit 0e90696dc2
2 changed files with 26 additions and 4 deletions
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1
fs/cifs/cifs_ioctl.h
View File

@ -46,6 +46,7 @@ struct smb_snapshot_array {
/* query_info flags */
#define PASSTHRU_QUERY_INFO 0x00000000
#define PASSTHRU_FSCTL 0x00000001
#define PASSTHRU_SET_INFO 0x00000002
struct smb_query_info {
__u32 info_type;
__u32 file_info_class;

29
fs/cifs/smb2ops.c
View File

@ -1369,7 +1369,10 @@ smb2_ioctl_query_info(const unsigned int xid,
struct cifs_fid fid;
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];
unsigned int size[2];
void *data[2];
memset(rqst, 0, sizeof(rqst));
resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
@ -1404,7 +1407,6 @@ smb2_ioctl_query_info(const unsigned int xid,
memset(&oparms, 0, sizeof(oparms));
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
oparms.disposition = FILE_OPEN;
if (is_dir)
oparms.create_options = CREATE_NOT_FILE;
@ -1413,9 +1415,6 @@ smb2_ioctl_query_info(const unsigned int xid,
oparms.fid = &fid;
oparms.reconnect = false;
/*
* FSCTL codes encode the special access they need in the fsctl code.
*/
if (qi.flags & PASSTHRU_FSCTL) {
switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
@ -1431,6 +1430,10 @@ smb2_ioctl_query_info(const unsigned int xid,
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, &rqst[0], &oplock, &oparms, path);
@ -1454,6 +1457,24 @@ smb2_ioctl_query_info(const unsigned int xid,
qi.output_buffer_length,
CIFSMaxBufSize);
}
} else if (qi.flags == PASSTHRU_SET_INFO) {
/* Can eventually relax perm check since server enforces too */
if (!capable(CAP_SYS_ADMIN))
rc = -EPERM;
else {
memset(&si_iov, 0, sizeof(si_iov));
rqst[1].rq_iov = si_iov;
rqst[1].rq_nvec = 1;
size[0] = 8;
data[0] = buffer;
rc = SMB2_set_info_init(tcon, &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) {
memset(&qi_iov, 0, sizeof(qi_iov));
rqst[1].rq_iov = qi_iov;