cifs: Add support for parsing WSL-style symlinks

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Linux CIFS client currently does not implement readlink() for WSL-style
symlinks. It is only able to detect that file is of WSL-style symlink, but
is not able to read target symlink location.

Add this missing functionality and implement support for parsing content of
WSL-style symlink.

The important note is that symlink target location stored for WSL symlink
reparse point (IO_REPARSE_TAG_LX_SYMLINK) is in UTF-8 encoding instead of
UTF-16 (which is used in whole SMB protocol and also in all other symlink
styles). So for proper locale/cp support it is needed to do conversion from
UTF-8 to local_nls.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

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Pali Rohár 2024-09-28 13:21:24 +02:00 • committed by Steve French

parent dd26bc067e

commit 06a7adf318

2 changed files with 58 additions and 0 deletions

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49

fs/smb/client/reparse.c

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9

fs/smb/common/smb2pdu.h

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