From patchwork Thu Sep 29 15:30:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Brauner X-Patchwork-Id: 12994307 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 53A01C433F5 for ; Thu, 29 Sep 2022 15:34:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235091AbiI2Pev (ORCPT ); Thu, 29 Sep 2022 11:34:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48218 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235729AbiI2Pc7 (ORCPT ); Thu, 29 Sep 2022 11:32:59 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 93621174213; Thu, 29 Sep 2022 08:32:09 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 1A716B824F3; Thu, 29 Sep 2022 15:32:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 26B61C433C1; Thu, 29 Sep 2022 15:32:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1664465526; bh=T6JM9aDn7FbCOKTzSH+a9h2WaVoXSHz/txqN3vtn7uU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KrvOti2zSD7UASf6pZK6AF+HwGU4p8NzQoz1e7Q5pzTxZXTou3uB1a+5NYB02eeF2 lzqGeB6LWW4bBIVpPbjIVh7Y2J+Dw5mC6ujNcf+pwlf2RLnbRNrn4bFMYhWdz+8hEf xZNBMQktq4nH6ctPkee78rhXb7Tceb6faohOYU6ZgbYm1Dhl9j/vD2KFCW+v4N1JCc BQmb45Gme3+S6ibDlYIupTCGRT00mBHxUq+w+3aIq8nnAWZV8bYq4RiiQUntHuzLdQ 8J49i1S1dAAsiuYlhyNiFi9dRopYEwOSEF/w6IjUigRD58y4cPIoVgZR2wywCMopiV NDQn678u6+cLw== From: Christian Brauner To: linux-fsdevel@vger.kernel.org Cc: Christian Brauner , Seth Forshee , Christoph Hellwig , Al Viro , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Hyunchul Lee , Sergey Senozhatsky , linux-cifs@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH v4 28/30] cifs: use stub posix acl handlers Date: Thu, 29 Sep 2022 17:30:38 +0200 Message-Id: <20220929153041.500115-29-brauner@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220929153041.500115-1-brauner@kernel.org> References: <20220929153041.500115-1-brauner@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=15493; i=brauner@kernel.org; h=from:subject; bh=T6JM9aDn7FbCOKTzSH+a9h2WaVoXSHz/txqN3vtn7uU=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMSSb7hL/emNxSs+B2zPWxzufe/gr+9a7vT8K/9875ShWmnmo WfVsSUcpC4MYF4OsmCKLQ7tJuNxynorNRpkaMHNYmUCGMHBxCsBEnnsx/K+eGvC65ttmO/vTm6NUdz uF/vlo4/7q/eo781JWpub5XvZhZLgsbnLTtj1HXGvuIy5n47VpPDMrUq+c9g9r/h3qePGjMjsA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Now that cifs supports the get and set acl inode operations and the vfs has been switched to the new posi api, cifs can simply rely on the stub posix acl handlers. The custom xattr handlers and associated unused helpers can be removed. Signed-off-by: Christian Brauner (Microsoft) --- Notes: /* v2 */ unchanged /* v3 */ unchanged /* v4 */ "Sedat Dilek (DHL Supply Chain)" : - s/CONFIG_XFS_POSIX_ACL/CONFIG_FS_POSIX_ACL/ fs/cifs/cifsproto.h | 8 -- fs/cifs/cifssmb.c | 298 -------------------------------------------- fs/cifs/xattr.c | 68 +--------- 3 files changed, 4 insertions(+), 370 deletions(-) diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 279e867dee2e..9259da1b885d 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -542,18 +542,10 @@ extern int CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid, struct cifs_ntsd **acl_inf, __u32 *buflen); extern int CIFSSMBSetCIFSACL(const unsigned int, struct cifs_tcon *, __u16, struct cifs_ntsd *, __u32, int); -extern int CIFSSMBGetPosixACL(const unsigned int xid, struct cifs_tcon *tcon, - const unsigned char *searchName, - char *acl_inf, const int buflen, const int acl_type, - const struct nls_table *nls_codepage, int remap_special_chars); extern int cifs_do_get_acl(const unsigned int xid, struct cifs_tcon *tcon, const unsigned char *searchName, struct posix_acl **acl, const int acl_type, const struct nls_table *nls_codepage, int remap); -extern int CIFSSMBSetPosixACL(const unsigned int xid, struct cifs_tcon *tcon, - const unsigned char *fileName, - const char *local_acl, const int buflen, const int acl_type, - const struct nls_table *nls_codepage, int remap_special_chars); extern int cifs_do_set_acl(const unsigned int xid, struct cifs_tcon *tcon, const unsigned char *fileName, const struct posix_acl *acl, const int acl_type, diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 7b47d0def5d2..ddef789a6fcb 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -2914,304 +2914,6 @@ CIFSSMB_set_compression(const unsigned int xid, struct cifs_tcon *tcon, #ifdef CONFIG_CIFS_POSIX -/*Convert an Access Control Entry from wire format to local POSIX xattr format*/ -static void cifs_convert_ace(struct posix_acl_xattr_entry *ace, - struct cifs_posix_ace *cifs_ace) -{ - /* u8 cifs fields do not need le conversion */ - ace->e_perm = cpu_to_le16(cifs_ace->cifs_e_perm); - ace->e_tag = cpu_to_le16(cifs_ace->cifs_e_tag); - ace->e_id = cpu_to_le32(le64_to_cpu(cifs_ace->cifs_uid)); -/* - cifs_dbg(FYI, "perm %d tag %d id %d\n", - ace->e_perm, ace->e_tag, ace->e_id); -*/ - - return; -} - -/* Convert ACL from CIFS POSIX wire format to local Linux POSIX ACL xattr */ -static int cifs_copy_posix_acl(char *trgt, char *src, const int buflen, - const int acl_type, const int size_of_data_area) -{ - int size = 0; - int i; - __u16 count; - struct cifs_posix_ace *pACE; - struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)src; - struct posix_acl_xattr_header *local_acl = (void *)trgt; - - if (le16_to_cpu(cifs_acl->version) != CIFS_ACL_VERSION) - return -EOPNOTSUPP; - - if (acl_type == ACL_TYPE_ACCESS) { - count = le16_to_cpu(cifs_acl->access_entry_count); - pACE = &cifs_acl->ace_array[0]; - size = sizeof(struct cifs_posix_acl); - size += sizeof(struct cifs_posix_ace) * count; - /* check if we would go beyond end of SMB */ - if (size_of_data_area < size) { - cifs_dbg(FYI, "bad CIFS POSIX ACL size %d vs. %d\n", - size_of_data_area, size); - return -EINVAL; - } - } else if (acl_type == ACL_TYPE_DEFAULT) { - count = le16_to_cpu(cifs_acl->access_entry_count); - size = sizeof(struct cifs_posix_acl); - size += sizeof(struct cifs_posix_ace) * count; -/* skip past access ACEs to get to default ACEs */ - pACE = &cifs_acl->ace_array[count]; - count = le16_to_cpu(cifs_acl->default_entry_count); - size += sizeof(struct cifs_posix_ace) * count; - /* check if we would go beyond end of SMB */ - if (size_of_data_area < size) - return -EINVAL; - } else { - /* illegal type */ - return -EINVAL; - } - - size = posix_acl_xattr_size(count); - if ((buflen == 0) || (local_acl == NULL)) { - /* used to query ACL EA size */ - } else if (size > buflen) { - return -ERANGE; - } else /* buffer big enough */ { - struct posix_acl_xattr_entry *ace = (void *)(local_acl + 1); - - local_acl->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION); - for (i = 0; i < count ; i++) { - cifs_convert_ace(&ace[i], pACE); - pACE++; - } - } - return size; -} - -static void convert_ace_to_cifs_ace(struct cifs_posix_ace *cifs_ace, - const struct posix_acl_xattr_entry *local_ace) -{ - cifs_ace->cifs_e_perm = le16_to_cpu(local_ace->e_perm); - cifs_ace->cifs_e_tag = le16_to_cpu(local_ace->e_tag); - /* BB is there a better way to handle the large uid? */ - if (local_ace->e_id == cpu_to_le32(-1)) { - /* Probably no need to le convert -1 on any arch but can not hurt */ - cifs_ace->cifs_uid = cpu_to_le64(-1); - } else - cifs_ace->cifs_uid = cpu_to_le64(le32_to_cpu(local_ace->e_id)); -/* - cifs_dbg(FYI, "perm %d tag %d id %d\n", - ace->e_perm, ace->e_tag, ace->e_id); -*/ -} - -/* Convert ACL from local Linux POSIX xattr to CIFS POSIX ACL wire format */ -static __u16 ACL_to_cifs_posix(char *parm_data, const char *pACL, - const int buflen, const int acl_type) -{ - __u16 rc = 0; - struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)parm_data; - struct posix_acl_xattr_header *local_acl = (void *)pACL; - struct posix_acl_xattr_entry *ace = (void *)(local_acl + 1); - int count; - int i; - - if ((buflen == 0) || (pACL == NULL) || (cifs_acl == NULL)) - return 0; - - count = posix_acl_xattr_count((size_t)buflen); - cifs_dbg(FYI, "setting acl with %d entries from buf of length %d and version of %d\n", - count, buflen, le32_to_cpu(local_acl->a_version)); - if (le32_to_cpu(local_acl->a_version) != 2) { - cifs_dbg(FYI, "unknown POSIX ACL version %d\n", - le32_to_cpu(local_acl->a_version)); - return 0; - } - cifs_acl->version = cpu_to_le16(1); - if (acl_type == ACL_TYPE_ACCESS) { - cifs_acl->access_entry_count = cpu_to_le16(count); - cifs_acl->default_entry_count = cpu_to_le16(0xFFFF); - } else if (acl_type == ACL_TYPE_DEFAULT) { - cifs_acl->default_entry_count = cpu_to_le16(count); - cifs_acl->access_entry_count = cpu_to_le16(0xFFFF); - } else { - cifs_dbg(FYI, "unknown ACL type %d\n", acl_type); - return 0; - } - for (i = 0; i < count; i++) - convert_ace_to_cifs_ace(&cifs_acl->ace_array[i], &ace[i]); - if (rc == 0) { - rc = (__u16)(count * sizeof(struct cifs_posix_ace)); - rc += sizeof(struct cifs_posix_acl); - /* BB add check to make sure ACL does not overflow SMB */ - } - return rc; -} - -int -CIFSSMBGetPosixACL(const unsigned int xid, struct cifs_tcon *tcon, - const unsigned char *searchName, - char *acl_inf, const int buflen, const int acl_type, - const struct nls_table *nls_codepage, int remap) -{ -/* SMB_QUERY_POSIX_ACL */ - TRANSACTION2_QPI_REQ *pSMB = NULL; - TRANSACTION2_QPI_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned; - int name_len; - __u16 params, byte_count; - - cifs_dbg(FYI, "In GetPosixACL (Unix) for path %s\n", searchName); - -queryAclRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, - searchName, PATH_MAX, nls_codepage, - remap); - name_len++; /* trailing null */ - name_len *= 2; - pSMB->FileName[name_len] = 0; - pSMB->FileName[name_len+1] = 0; - } else { - name_len = copy_path_name(pSMB->FileName, searchName); - } - - params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ; - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max data count below from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(4000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - pSMB->ParameterOffset = cpu_to_le16( - offsetof(struct smb_com_transaction2_qpi_req, - InformationLevel) - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION); - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_POSIX_ACL); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->stats.cifs_stats.num_acl_get); - if (rc) { - cifs_dbg(FYI, "Send error in Query POSIX ACL = %d\n", rc); - } else { - /* decode response */ - - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - /* BB also check enough total bytes returned */ - if (rc || get_bcc(&pSMBr->hdr) < 2) - rc = -EIO; /* bad smb */ - else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - __u16 count = le16_to_cpu(pSMBr->t2.DataCount); - rc = cifs_copy_posix_acl(acl_inf, - (char *)&pSMBr->hdr.Protocol+data_offset, - buflen, acl_type, count); - } - } - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto queryAclRetry; - return rc; -} - -int -CIFSSMBSetPosixACL(const unsigned int xid, struct cifs_tcon *tcon, - const unsigned char *fileName, - const char *local_acl, const int buflen, - const int acl_type, - const struct nls_table *nls_codepage, int remap) -{ - struct smb_com_transaction2_spi_req *pSMB = NULL; - struct smb_com_transaction2_spi_rsp *pSMBr = NULL; - char *parm_data; - int name_len; - int rc = 0; - int bytes_returned = 0; - __u16 params, byte_count, data_count, param_offset, offset; - - cifs_dbg(FYI, "In SetPosixACL (Unix) for path %s\n", fileName); -setAclRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { - name_len = copy_path_name(pSMB->FileName, fileName); - } - params = 6 + name_len; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find max SMB size from sess */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_spi_req, - InformationLevel) - 4; - offset = param_offset + params; - parm_data = ((char *) &pSMB->hdr.Protocol) + offset; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - - /* convert to on the wire format for POSIX ACL */ - data_count = ACL_to_cifs_posix(parm_data, local_acl, buflen, acl_type); - - if (data_count == 0) { - rc = -EOPNOTSUPP; - goto setACLerrorExit; - } - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION); - pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_ACL); - byte_count = 3 /* pad */ + params + data_count; - pSMB->DataCount = cpu_to_le16(data_count); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) - cifs_dbg(FYI, "Set POSIX ACL returned %d\n", rc); - -setACLerrorExit: - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto setAclRetry; - return rc; -} - #ifdef CONFIG_FS_POSIX_ACL /** * cifs_init_posix_acl - convert ACL from cifs to POSIX ACL format diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c index 998fa51f9b68..5f2fb2fd2e37 100644 --- a/fs/cifs/xattr.c +++ b/fs/cifs/xattr.c @@ -200,32 +200,6 @@ static int cifs_xattr_set(const struct xattr_handler *handler, } break; } - -#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY - case XATTR_ACL_ACCESS: -#ifdef CONFIG_CIFS_POSIX - if (!value) - goto out; - if (sb->s_flags & SB_POSIXACL) - rc = CIFSSMBSetPosixACL(xid, pTcon, full_path, - value, (const int)size, - ACL_TYPE_ACCESS, cifs_sb->local_nls, - cifs_remap(cifs_sb)); -#endif /* CONFIG_CIFS_POSIX */ - break; - - case XATTR_ACL_DEFAULT: -#ifdef CONFIG_CIFS_POSIX - if (!value) - goto out; - if (sb->s_flags & SB_POSIXACL) - rc = CIFSSMBSetPosixACL(xid, pTcon, full_path, - value, (const int)size, - ACL_TYPE_DEFAULT, cifs_sb->local_nls, - cifs_remap(cifs_sb)); -#endif /* CONFIG_CIFS_POSIX */ - break; -#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ } out: @@ -366,27 +340,6 @@ static int cifs_xattr_get(const struct xattr_handler *handler, } break; } -#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY - case XATTR_ACL_ACCESS: -#ifdef CONFIG_CIFS_POSIX - if (sb->s_flags & SB_POSIXACL) - rc = CIFSSMBGetPosixACL(xid, pTcon, full_path, - value, size, ACL_TYPE_ACCESS, - cifs_sb->local_nls, - cifs_remap(cifs_sb)); -#endif /* CONFIG_CIFS_POSIX */ - break; - - case XATTR_ACL_DEFAULT: -#ifdef CONFIG_CIFS_POSIX - if (sb->s_flags & SB_POSIXACL) - rc = CIFSSMBGetPosixACL(xid, pTcon, full_path, - value, size, ACL_TYPE_DEFAULT, - cifs_sb->local_nls, - cifs_remap(cifs_sb)); -#endif /* CONFIG_CIFS_POSIX */ - break; -#endif /* ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ } /* We could add an additional check for streams ie @@ -525,21 +478,6 @@ static const struct xattr_handler smb3_ntsd_full_xattr_handler = { .set = cifs_xattr_set, }; - -static const struct xattr_handler cifs_posix_acl_access_xattr_handler = { - .name = XATTR_NAME_POSIX_ACL_ACCESS, - .flags = XATTR_ACL_ACCESS, - .get = cifs_xattr_get, - .set = cifs_xattr_set, -}; - -static const struct xattr_handler cifs_posix_acl_default_xattr_handler = { - .name = XATTR_NAME_POSIX_ACL_DEFAULT, - .flags = XATTR_ACL_DEFAULT, - .get = cifs_xattr_get, - .set = cifs_xattr_set, -}; - const struct xattr_handler *cifs_xattr_handlers[] = { &cifs_user_xattr_handler, &cifs_os2_xattr_handler, @@ -549,7 +487,9 @@ const struct xattr_handler *cifs_xattr_handlers[] = { &smb3_ntsd_xattr_handler, /* alias for above since avoiding "cifs" */ &cifs_cifs_ntsd_full_xattr_handler, &smb3_ntsd_full_xattr_handler, /* alias for above since avoiding "cifs" */ - &cifs_posix_acl_access_xattr_handler, - &cifs_posix_acl_default_xattr_handler, +#ifdef CONFIG_FS_POSIX_ACL + &posix_acl_access_xattr_handler, + &posix_acl_default_xattr_handler, +#endif NULL };