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When CAP_NT_SMBS was not negotiated then do not issue CIFSSMBQPathInfo() and CIFSSMBQFileInfo() commands. CIFSSMBQPathInfo() is not supported by non-NT Win9x SMB server and CIFSSMBQFileInfo() returns from Win9x SMB server bogus data in Attributes field (for example lot of files are marked as reparse points, even Win9x does not support them and read-only bit is not marked for read-only files). Correct information is returned by CIFSFindFirst() or SMBQueryInformation() command. So as a fallback in cifs_query_path_info() function use CIFSFindFirst() with SMB_FIND_FILE_FULL_DIRECTORY_INFO level which is supported by both NT and non-NT servers and as a last option use SMBQueryInformation() as it was before. And in function cifs_query_file_info() immediately returns -EOPNOTSUPP when not communicating with NT server. Client then revalidate inode entry by the cifs_query_path_info() call, which is working fine. So fstat() syscall on already opened file will receive correct information. Note that both fallback functions in non-UNICODE mode expands wildcards. Therefore those fallback functions cannot be used on paths which contain SMB wildcard characters (* ? " > <). CIFSFindFirst() returns all 4 time attributes as opposite of SMBQueryInformation() which returns only one. With this change it is possible to query all 4 times attributes from Win9x server and at the same time, client minimize sending of unsupported commands to server. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com> |
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| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
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| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.