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b07687edee
If SMB2_OP_QUERY_INFO (called when POSIX extensions are not used) failed with STATUS_ACCESS_DENIED then it means that caller does not have permission to open the path with FILE_READ_ATTRIBUTES access and therefore cannot issue SMB2_OP_QUERY_INFO command. This will result in the -EACCES error from stat() sycall. There is an alternative way how to query limited information about path but still suitable for stat() syscall. SMB2 OPEN/CREATE operation returns in its successful response subset of query information. So try to open the path without FILE_READ_ATTRIBUTES but with MAXIMUM_ALLOWED access which will grant the maximum possible access to the file and the response will contain required query information for stat() syscall. This will improve smb2_query_path_info() to query also files which do not grant FILE_READ_ATTRIBUTES access to caller. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.