diff options
Diffstat (limited to 'fs/cifs/smb2pdu.c')
| -rw-r--r-- | fs/cifs/smb2pdu.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index df12cf8bd979..7887cf50e5fb 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -2358,17 +2358,27 @@ qfsinf_exit: int SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, - u64 persistent_fid, u64 volatile_fid) + u64 persistent_fid, u64 volatile_fid, int level) { struct smb2_query_info_rsp *rsp = NULL; struct kvec iov; int rc = 0; - int resp_buftype; + int resp_buftype, max_len, min_len; struct cifs_ses *ses = tcon->ses; unsigned int rsp_len, offset; - rc = build_qfs_info_req(&iov, tcon, SMB_QUERY_FS_ATTRIBUTE_INFO, - sizeof(FILE_SYSTEM_ATTRIBUTE_INFO), + if (level == FS_DEVICE_INFORMATION) { + max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); + min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); + } else if (level == FS_ATTRIBUTE_INFORMATION) { + max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); + min_len = MIN_FS_ATTR_INFO_SIZE; + } else { + cifs_dbg(FYI, "Invalid qfsinfo level %d", level); + return -EINVAL; + } + + rc = build_qfs_info_req(&iov, tcon, level, max_len, persistent_fid, volatile_fid); if (rc) return rc; @@ -2382,12 +2392,17 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, rsp_len = le32_to_cpu(rsp->OutputBufferLength); offset = le16_to_cpu(rsp->OutputBufferOffset); - rc = validate_buf(offset, rsp_len, &rsp->hdr, MIN_FS_ATTR_INFO_SIZE); - if (!rc) { + rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len); + if (rc) + goto qfsattr_exit; + + if (level == FS_ATTRIBUTE_INFORMATION) memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset + (char *)&rsp->hdr, min_t(unsigned int, - rsp_len, sizeof(FILE_SYSTEM_ATTRIBUTE_INFO))); - } + rsp_len, max_len)); + else if (level == FS_DEVICE_INFORMATION) + memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset + + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO)); qfsattr_exit: free_rsp_buf(resp_buftype, iov.iov_base); |