CIFS: Add statfs support for SMB2
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 566d86b..994c184 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1971,3 +1971,84 @@
return rc;
}
+
+static void
+copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
+ struct kstatfs *kst)
+{
+ kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
+ le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
+ kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
+ kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
+ kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
+ return;
+}
+
+static int
+build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
+ int outbuf_len, u64 persistent_fid, u64 volatile_fid)
+{
+ int rc;
+ struct smb2_query_info_req *req;
+
+ cFYI(1, "Query FSInfo level %d", level);
+
+ if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
+ return -EIO;
+
+ rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ req->InfoType = SMB2_O_INFO_FILESYSTEM;
+ req->FileInfoClass = level;
+ req->PersistentFileId = persistent_fid;
+ req->VolatileFileId = volatile_fid;
+ /* 4 for rfc1002 length field and 1 for pad */
+ req->InputBufferOffset =
+ cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
+ req->OutputBufferLength = cpu_to_le32(
+ outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
+
+ iov->iov_base = (char *)req;
+ /* 4 for rfc1002 length field */
+ iov->iov_len = get_rfc1002_length(req) + 4;
+ return 0;
+}
+
+int
+SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
+{
+ struct smb2_query_info_rsp *rsp = NULL;
+ struct kvec iov;
+ int rc = 0;
+ int resp_buftype;
+ struct cifs_ses *ses = tcon->ses;
+ struct smb2_fs_full_size_info *info = NULL;
+
+ rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
+ sizeof(struct smb2_fs_full_size_info),
+ persistent_fid, volatile_fid);
+ if (rc)
+ return rc;
+
+ rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
+ if (rc) {
+ cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
+ goto qinf_exit;
+ }
+ rsp = (struct smb2_query_info_rsp *)iov.iov_base;
+
+ info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
+ le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
+ rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
+ le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
+ sizeof(struct smb2_fs_full_size_info));
+ if (!rc)
+ copy_fs_info_to_kstatfs(info, fsdata);
+
+qinf_exit:
+ free_rsp_buf(resp_buftype, iov.iov_base);
+ return rc;
+}