From patchwork Sun Dec 22 17:24:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Pali_Roh=C3=A1r?= X-Patchwork-Id: 13918224 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F1F5619068E; Sun, 22 Dec 2024 17:24:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734888268; cv=none; b=PfvvB5Jv6vSpvJszvVQOgskLZkQDunHnk0Zo7mU5ixg9VI3mILEELJWqDeTQ0tM8w3+nh1u2wxRXulCnx4sLvJwYWn43cyl6AnhJsZCx/hPjc+157h9xbDoa+U47gnfYef9JuGjbFJMFqAzLFa6rhqma53tolYtpV87idBQp15A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734888268; c=relaxed/simple; bh=WJK7TY5E0PYn0ZjBtJv7A7+wKin7P2WriV5KcJ0M7wI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=NDygbBnziwtMfasdWz85rShZb8lEyA3NuThITE+LGMn2CuXYiOuGFjbW1E6KLM3uToa83A2czyGUImwEAvQ2o48KcyeaibiqkUB5GTh0JPVdygJ+PbSIDc42wyUToRfEoX/l2dBNokXcB0p5qSWjQbUGoOckpSEOPpihT5U1Sq0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ku0M9Pjt; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Ku0M9Pjt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 379C2C4CEDC; Sun, 22 Dec 2024 17:24:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734888267; bh=WJK7TY5E0PYn0ZjBtJv7A7+wKin7P2WriV5KcJ0M7wI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ku0M9PjtDm2y1KBc5U9oR2mll+PMczTz99Fvfu7WeF4TJD3sE6eyxByvWOHk+KBPi H/vwYk4j+vIvFBGwVbV7ZYt8pFbAHHf5/3HsGoEsjX6IiqUkuojjkkxZb27KpICHA3 yJfy5sSnPV1kwruoBCI+LVepDeQqaODuCmlbiWGfgwdSt81ZSd6LP+jOEdXV0XW9kt DUE1u2qOWQSIGqmCp18ZOmjBJVUOzjG2dnEHHQK3z3K2hMN0Q8JHcXs813L0hIGBOf Q/U1UrQpfzKZk4rJs3A4br4VnpAcyUWQoIY4CGOoJMil5js86bkoB6HmTaJdfXbkhN U+2yuOqN0OKSA== Received: by pali.im (Postfix) id ABD3ED48; Sun, 22 Dec 2024 18:24:17 +0100 (CET) From: =?utf-8?q?Pali_Roh=C3=A1r?= To: Steve French , Paulo Alcantara , Ronnie Sahlberg , Namjae Jeon , Sergey Senozhatsky Cc: linux-cifs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/3] cifs: Rename struct reparse_posix_data to reparse_nfs_data_buffer and move to common/smb2pdu.h Date: Sun, 22 Dec 2024 18:24:04 +0100 Message-Id: <20241222172404.24755-4-pali@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241222172404.24755-1-pali@kernel.org> References: <20241222172404.24755-1-pali@kernel.org> Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Function parse_reparse_posix() parses NFS-style reparse points, which are used only by Windows NFS server since Windows Server 2012 version. This style is not understood by Microsoft POSIX/Interix/SFU/SUA subsystems. So make it clear that parse_reparse_posix() function and reparse_posix_data structure are not POSIX general, but rather NFS specific. All reparse buffer structures are defined in common/smb2pdu.h and have _buffer suffix. So move struct reparse_posix_data from client/cifspdu.h to common/smb2pdu.h and rename it to reparse_nfs_data_buffer for consistency. Note that also SMB specification in [MS-FSCC] document, section 2.1.2.6 defines it under name "Network File System (NFS) Reparse Data Buffer". So use this name for consistency. Having this structure in common/smb2pdu.h can be useful for ksmbd server code as NFS-style reparse points is the preferred way for implementing support for special files. Signed-off-by: Pali Rohár --- fs/smb/client/cifspdu.h | 14 -------------- fs/smb/client/reparse.c | 12 ++++++------ fs/smb/common/smb2pdu.h | 14 +++++++++++++- 3 files changed, 19 insertions(+), 21 deletions(-) diff --git a/fs/smb/client/cifspdu.h b/fs/smb/client/cifspdu.h index 2a29fa31c927..f4c348b5c4f1 100644 --- a/fs/smb/client/cifspdu.h +++ b/fs/smb/client/cifspdu.h @@ -1485,20 +1485,6 @@ struct file_notify_information { __u8 FileName[]; } __attribute__((packed)); -/* For IO_REPARSE_TAG_NFS */ -#define NFS_SPECFILE_LNK 0x00000000014B4E4C -#define NFS_SPECFILE_CHR 0x0000000000524843 -#define NFS_SPECFILE_BLK 0x00000000004B4C42 -#define NFS_SPECFILE_FIFO 0x000000004F464946 -#define NFS_SPECFILE_SOCK 0x000000004B434F53 -struct reparse_posix_data { - __le32 ReparseTag; - __le16 ReparseDataLength; - __u16 Reserved; - __le64 InodeType; /* LNK, FIFO, CHR etc. */ - __u8 DataBuffer[]; -} __attribute__((packed)); - struct cifs_quota_data { __u32 rsrvd1; /* 0 */ __u32 sid_size; diff --git a/fs/smb/client/reparse.c b/fs/smb/client/reparse.c index 40070e99fc8a..9fe9dd71a6fa 100644 --- a/fs/smb/client/reparse.c +++ b/fs/smb/client/reparse.c @@ -407,7 +407,7 @@ static int create_native_socket(const unsigned int xid, struct inode *inode, return rc; } -static int nfs_set_reparse_buf(struct reparse_posix_data *buf, +static int nfs_set_reparse_buf(struct reparse_nfs_data_buffer *buf, mode_t mode, dev_t dev, __le16 *symname_utf16, int symname_utf16_len, @@ -454,7 +454,7 @@ static int mknod_nfs(unsigned int xid, struct inode *inode, { struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifs_open_info_data data; - struct reparse_posix_data *p = NULL; + struct reparse_nfs_data_buffer *p = NULL; __le16 *symname_utf16 = NULL; int symname_utf16_len = 0; struct inode *new; @@ -478,7 +478,7 @@ static int mknod_nfs(unsigned int xid, struct inode *inode, goto out; } } else { - p = (struct reparse_posix_data *)buf; + p = (struct reparse_nfs_data_buffer *)buf; } rc = nfs_set_reparse_buf(p, mode, dev, symname_utf16, symname_utf16_len, &iov); if (rc) @@ -716,7 +716,7 @@ int smb2_mknod_reparse(unsigned int xid, struct inode *inode, } /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */ -static int parse_reparse_posix(struct reparse_posix_data *buf, +static int parse_reparse_nfs(struct reparse_nfs_data_buffer *buf, struct cifs_sb_info *cifs_sb, struct cifs_open_info_data *data) { @@ -1069,7 +1069,7 @@ int parse_reparse_point(struct reparse_data_buffer *buf, /* See MS-FSCC 2.1.2 */ switch (le32_to_cpu(buf->ReparseTag)) { case IO_REPARSE_TAG_NFS: - return parse_reparse_posix((struct reparse_posix_data *)buf, + return parse_reparse_nfs((struct reparse_nfs_data_buffer *)buf, cifs_sb, data); case IO_REPARSE_TAG_SYMLINK: return parse_reparse_native_symlink( @@ -1165,7 +1165,7 @@ static bool posix_reparse_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, struct cifs_open_info_data *data) { - struct reparse_posix_data *buf = (struct reparse_posix_data *)data->reparse.buf; + struct reparse_nfs_data_buffer *buf = (struct reparse_nfs_data_buffer *)data->reparse.buf; if (buf == NULL) return true; diff --git a/fs/smb/common/smb2pdu.h b/fs/smb/common/smb2pdu.h index 3c7c706c797d..3336df2ea5d4 100644 --- a/fs/smb/common/smb2pdu.h +++ b/fs/smb/common/smb2pdu.h @@ -1550,7 +1550,19 @@ struct reparse_symlink_data_buffer { __u8 PathBuffer[]; /* Variable Length */ } __packed; -/* See MS-FSCC 2.1.2.6 and cifspdu.h for struct reparse_posix_data */ +/* For IO_REPARSE_TAG_NFS - see MS-FSCC 2.1.2.6 */ +#define NFS_SPECFILE_LNK 0x00000000014B4E4C +#define NFS_SPECFILE_CHR 0x0000000000524843 +#define NFS_SPECFILE_BLK 0x00000000004B4C42 +#define NFS_SPECFILE_FIFO 0x000000004F464946 +#define NFS_SPECFILE_SOCK 0x000000004B434F53 +struct reparse_nfs_data_buffer { + __le32 ReparseTag; + __le16 ReparseDataLength; + __u16 Reserved; + __le64 InodeType; /* NFS_SPECFILE_* */ + __u8 DataBuffer[]; +} __packed; /* For IO_REPARSE_TAG_LX_SYMLINK */ struct reparse_wsl_symlink_data_buffer {