diff options
Diffstat (limited to 'fs/cifs/smb2ops.c')
| -rw-r--r-- | fs/cifs/smb2ops.c | 87 |
1 files changed, 86 insertions, 1 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index b744221f685d..c6c6450d0f38 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1118,6 +1118,86 @@ req_res_key_exit: return rc; } +static int +smb2_ioctl_query_info(const unsigned int xid, + struct cifsFileInfo *file, + unsigned long p) +{ + struct cifs_tcon *tcon = tlink_tcon(file->tlink); + struct cifs_ses *ses = tcon->ses; + char __user *arg = (char __user *)p; + struct smb_query_info qi; + struct smb_query_info __user *pqi; + int rc = 0; + int flags = 0; + struct smb_rqst rqst; + struct kvec iov[1]; + struct kvec rsp_iov; + int resp_buftype; + struct smb2_query_info_rsp *rsp = NULL; + void *buffer; + + if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) + return -EFAULT; + + if (qi.output_buffer_length > 1024) + return -EINVAL; + + if (!ses || !(ses->server)) + return -EIO; + + if (smb3_encryption_required(tcon)) + flags |= CIFS_TRANSFORM_REQ; + + buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL); + if (buffer == NULL) + return -ENOMEM; + + if (copy_from_user(buffer, arg + sizeof(struct smb_query_info), + qi.output_buffer_length)) { + kfree(buffer); + return -EFAULT; + } + + memset(&rqst, 0, sizeof(struct smb_rqst)); + memset(&iov, 0, sizeof(iov)); + rqst.rq_iov = iov; + rqst.rq_nvec = 1; + + rc = SMB2_query_info_init(tcon, &rqst, file->fid.persistent_fid, + file->fid.volatile_fid, + qi.file_info_class, qi.info_type, + qi.additional_information, + qi.input_buffer_length, + qi.output_buffer_length, buffer); + kfree(buffer); + if (rc) + goto iqinf_exit; + + rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); + rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; + if (rc) + goto iqinf_exit; + + pqi = (struct smb_query_info __user *)arg; + if (le32_to_cpu(rsp->OutputBufferLength) < qi.input_buffer_length) + qi.input_buffer_length = le32_to_cpu(rsp->OutputBufferLength); + if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length, + sizeof(qi.input_buffer_length))) { + rc = -EFAULT; + goto iqinf_exit; + } + if (copy_to_user(pqi + 1, rsp->Buffer, qi.input_buffer_length)) { + rc = -EFAULT; + goto iqinf_exit; + } + + iqinf_exit: + SMB2_query_info_free(&rqst); + free_rsp_buf(resp_buftype, rsp); + return rc; +} + static ssize_t smb2_copychunk_range(const unsigned int xid, struct cifsFileInfo *srcfile, @@ -1697,7 +1777,8 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID, FS_FULL_SIZE_INFORMATION, SMB2_O_INFO_FILESYSTEM, 0, - sizeof(struct smb2_fs_full_size_info)); + sizeof(struct smb2_fs_full_size_info), 0, + NULL); if (rc) goto qfs_exit; smb2_set_next_command(server, &rqst[1]); @@ -3364,6 +3445,7 @@ struct smb_version_operations smb20_operations = { .set_acl = set_smb2_acl, #endif /* CIFS_ACL */ .next_header = smb2_next_header, + .ioctl_query_info = smb2_ioctl_query_info, }; struct smb_version_operations smb21_operations = { @@ -3459,6 +3541,7 @@ struct smb_version_operations smb21_operations = { .set_acl = set_smb2_acl, #endif /* CIFS_ACL */ .next_header = smb2_next_header, + .ioctl_query_info = smb2_ioctl_query_info, }; struct smb_version_operations smb30_operations = { @@ -3563,6 +3646,7 @@ struct smb_version_operations smb30_operations = { .set_acl = set_smb2_acl, #endif /* CIFS_ACL */ .next_header = smb2_next_header, + .ioctl_query_info = smb2_ioctl_query_info, }; struct smb_version_operations smb311_operations = { @@ -3668,6 +3752,7 @@ struct smb_version_operations smb311_operations = { .set_acl = set_smb2_acl, #endif /* CIFS_ACL */ .next_header = smb2_next_header, + .ioctl_query_info = smb2_ioctl_query_info, }; struct smb_version_values smb20_values = { |