smb3: add support for statfs for smb3.1.1 posix extensions
Output now matches expected stat -f output for all fields
except for Namelen and ID which were addressed in a companion
patch (which retrieves them from existing SMB3 mechanisms
and works whether POSIX enabled or not)
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 6852ff5..fa9fc3f 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -3938,6 +3938,27 @@ copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
return;
}
+#ifdef CONFIG_CIFS_SMB311
+static void
+copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
+ struct kstatfs *kst)
+{
+ kst->f_bsize = le32_to_cpu(response_data->BlockSize);
+ kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
+ kst->f_bfree = le64_to_cpu(response_data->BlocksAvail);
+ if (response_data->UserBlocksAvail == cpu_to_le64(-1))
+ kst->f_bavail = kst->f_bfree;
+ else
+ kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
+ if (response_data->TotalFileNodes != cpu_to_le64(-1))
+ kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
+ if (response_data->FreeFileNodes != cpu_to_le64(-1))
+ kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
+
+ return;
+}
+#endif /* SMB311 */
+
static int
build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
int outbuf_len, u64 persistent_fid, u64 volatile_fid)
@@ -3974,6 +3995,56 @@ build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
return 0;
}
+#ifdef CONFIG_CIFS_SMB311
+int
+SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
+{
+ struct smb_rqst rqst;
+ struct smb2_query_info_rsp *rsp = NULL;
+ struct kvec iov;
+ struct kvec rsp_iov;
+ int rc = 0;
+ int resp_buftype;
+ struct cifs_ses *ses = tcon->ses;
+ FILE_SYSTEM_POSIX_INFO *info = NULL;
+ int flags = 0;
+
+ rc = build_qfs_info_req(&iov, tcon, FS_POSIX_INFORMATION,
+ sizeof(FILE_SYSTEM_POSIX_INFO),
+ persistent_fid, volatile_fid);
+ if (rc)
+ return rc;
+
+ if (smb3_encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ memset(&rqst, 0, sizeof(struct smb_rqst));
+ rqst.rq_iov = &iov;
+ rqst.rq_nvec = 1;
+
+ rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
+ cifs_small_buf_release(iov.iov_base);
+ if (rc) {
+ cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
+ goto posix_qfsinf_exit;
+ }
+ rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
+
+ info = (FILE_SYSTEM_POSIX_INFO *)(
+ le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
+ rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
+ le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
+ sizeof(FILE_SYSTEM_POSIX_INFO));
+ if (!rc)
+ copy_posix_fs_info_to_kstatfs(info, fsdata);
+
+posix_qfsinf_exit:
+ free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+ return rc;
+}
+#endif /* SMB311 */
+
int
SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)