From patchwork Sun Sep 27 22:09:22 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Gruenbacher X-Patchwork-Id: 7274221 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 965DD9F1D5 for ; Sun, 27 Sep 2015 22:21:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5448420562 for ; Sun, 27 Sep 2015 22:21:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E39CE204E2 for ; Sun, 27 Sep 2015 22:21:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756560AbbI0WMq (ORCPT ); Sun, 27 Sep 2015 18:12:46 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35097 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753290AbbI0WMn (ORCPT ); Sun, 27 Sep 2015 18:12:43 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (Postfix) with ESMTPS id A681D368E3; Sun, 27 Sep 2015 22:12:43 +0000 (UTC) Received: from nuc.home.com (vpn1-4-81.ams2.redhat.com [10.36.4.81]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t8RM9ce1030610; Sun, 27 Sep 2015 18:12:38 -0400 From: Andreas Gruenbacher To: Alexander Viro , "Theodore Ts'o" , Andreas Dilger , "J. Bruce Fields" , Jeff Layton , Trond Myklebust , Anna Schumaker , linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-api@vger.kernel.org Subject: [PATCH v8 31/41] nfsd: Add support for the v4.1 dacl attribute Date: Mon, 28 Sep 2015 00:09:22 +0200 Message-Id: <1443391772-10171-32-git-send-email-agruenba@redhat.com> In-Reply-To: <1443391772-10171-1-git-send-email-agruenba@redhat.com> References: <1443391772-10171-1-git-send-email-agruenba@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Richacls support the Automatic Inheritance permission propagation mechanism as specified in NFSv4.1. Over NFS, this requires support for the dacl attribute: compared to the acl attribute, the dacl attribute has an additional flags field which indicates when Automatic Inheritance is in use. The server will only indicate dacl attribute support in protocol version 4.1 and later, on file systems with richacl support. This commit also adds support for the NFSv4.1 NFS4_ACE_WRITE_RETENTION and NFS4_ACE_WRITE_RETENTION_HOLD ACL permissions. Signed-off-by: Andreas Gruenbacher Acked-by: J. Bruce Fields --- fs/nfsd/nfs4proc.c | 3 +- fs/nfsd/nfs4xdr.c | 219 ++++++++++++++++++++++++++++++---------------- fs/nfsd/nfsd.h | 6 +- include/linux/nfs4.h | 1 + include/uapi/linux/nfs4.h | 3 +- 5 files changed, 155 insertions(+), 77 deletions(-) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 1bcfda2..a053e78 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1781,7 +1781,8 @@ static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; u32 ret = 0; - if (bmap0 & FATTR4_WORD0_ACL) + if (bmap0 & FATTR4_WORD0_ACL || + bmap1 & FATTR4_WORD1_DACL) return svc_max_payload(rqstp); if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) return svc_max_payload(rqstp); diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 682a7d8..33d028c 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -301,6 +301,68 @@ nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) DECODE_TAIL; } +static unsigned int +nfsd4_ace_mask(int minorversion) +{ + return minorversion == 0 ? NFS40_ACE_MASK_ALL : NFS4_ACE_MASK_ALL; +} + +static __be32 +nfsd4_decode_acl_entries(struct nfsd4_compoundargs *argp, struct richacl **acl, + unsigned short flags_mask, unsigned int ace_mask, + int *plen) +{ + struct richace *ace; + u32 dummy32; + char *buf; + int len = 0; + + DECODE_HEAD; + + flags_mask &= RICHACE_VALID_FLAGS & ~RICHACE_SPECIAL_WHO; + + READ_BUF(4); len += 4; + dummy32 = be32_to_cpup(p++); + + if (dummy32 > NFSD4_ACL_MAX) + return nfserr_fbig; + + *acl = svcxdr_alloc_richacl(argp, dummy32); + if (*acl == NULL) + return nfserr_jukebox; + + richacl_for_each_entry(ace, *acl) { + READ_BUF(16); len += 16; + + dummy32 = be32_to_cpup(p++); + if (dummy32 > RICHACE_ACCESS_DENIED_ACE_TYPE) + return nfserr_inval; + ace->e_type = dummy32; + + dummy32 = be32_to_cpup(p++); + if (dummy32 & ~flags_mask) + return nfserr_inval; + ace->e_flags = dummy32; + + dummy32 = be32_to_cpup(p++); + if (dummy32 & ~ace_mask) + return nfserr_inval; + ace->e_mask = dummy32; + + dummy32 = be32_to_cpup(p++); + READ_BUF(dummy32); + len += XDR_QUADLEN(dummy32) << 2; + READMEM(buf, dummy32); + status = nfsd4_decode_ace_who(ace, argp->rqstp, + buf, dummy32); + if (status) + return status; + } + *plen += len; + + DECODE_TAIL; +} + static __be32 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr, struct richacl **acl, @@ -312,6 +374,7 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, DECODE_HEAD; iattr->ia_valid = 0; + *acl = NULL; if ((status = nfsd4_decode_bitmap(argp, bmval))) return status; @@ -325,50 +388,18 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, iattr->ia_valid |= ATTR_SIZE; } if (bmval[0] & FATTR4_WORD0_ACL) { - u32 nace; - struct richace *ace; - - READ_BUF(4); len += 4; - nace = be32_to_cpup(p++); - - if (nace > NFSD4_ACL_MAX) - return nfserr_fbig; + if (bmval[1] & FATTR4_WORD1_DACL) + return nfserr_inval; - *acl = svcxdr_alloc_richacl(argp, nace); - if (*acl == NULL) + status = nfsd4_decode_acl_entries(argp, acl, + ~NFS4_ACE_INHERITED_ACE, + nfsd4_ace_mask(argp->minorversion), + &len); + if (status) + return status; + else if (*acl == NULL) return nfserr_jukebox; - - richacl_for_each_entry(ace, *acl) { - READ_BUF(16); len += 16; - - dummy32 = be32_to_cpup(p++); - if (dummy32 > RICHACE_ACCESS_DENIED_ACE_TYPE) - return nfserr_inval; - ace->e_type = dummy32; - - dummy32 = be32_to_cpup(p++); - if (dummy32 & (~RICHACE_VALID_FLAGS | - RICHACE_INHERITED_ACE | - RICHACE_SPECIAL_WHO)) - return nfserr_inval; - ace->e_flags = dummy32; - - dummy32 = be32_to_cpup(p++); - if (dummy32 & ~NFS4_ACE_MASK_ALL) - return nfserr_inval; - ace->e_mask = dummy32; - - dummy32 = be32_to_cpup(p++); - READ_BUF(dummy32); - len += XDR_QUADLEN(dummy32) << 2; - READMEM(buf, dummy32); - status = nfsd4_decode_ace_who(ace, argp->rqstp, - buf, dummy32); - if (status) - return status; - } - } else - *acl = NULL; + } if (bmval[1] & FATTR4_WORD1_MODE) { READ_BUF(4); len += 4; @@ -436,6 +467,22 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, goto xdr_error; } } + if (bmval[1] & FATTR4_WORD1_DACL) { + READ_BUF(4); + len += 4; + dummy32 = be32_to_cpup(p++); + if (dummy32 & (~RICHACL_VALID_FLAGS | RICHACL_MASKED)) + return nfserr_inval; + status = nfsd4_decode_acl_entries(argp, acl, + ~0, + nfsd4_ace_mask(argp->minorversion), + &len); + if (status) + return status; + else if (*acl == NULL) + return nfserr_jukebox; + (*acl)->a_flags = dummy32; + } label->len = 0; #ifdef CONFIG_NFSD_V4_SECURITY_LABEL @@ -2272,6 +2319,42 @@ out_resource: return nfserr_resource; } +static __be32 nfsd4_encode_acl_entries(struct xdr_stream *xdr, + struct richacl *acl, struct svc_rqst *rqstp, + unsigned short flags_mask, unsigned int ace_mask) +{ + __be32 *p; + + flags_mask &= ~RICHACE_SPECIAL_WHO; + + p = xdr_reserve_space(xdr, 4); + if (!p) + return nfserr_resource; + + if (acl == NULL) { + *p++ = cpu_to_be32(0); + } else { + struct richace *ace; + + *p++ = cpu_to_be32(acl->a_count); + + richacl_for_each_entry(ace, acl) { + __be32 status; + + p = xdr_reserve_space(xdr, 4*3); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(ace->e_type); + *p++ = cpu_to_be32(ace->e_flags & flags_mask); + *p++ = cpu_to_be32(ace->e_mask & ace_mask); + status = nfsd4_encode_ace_who(xdr, rqstp, ace); + if (status) + return status; + } + } + return 0; +} + /* * Note: @fhp can be NULL; in this case, we might have to compose the filehandle * ourselves. @@ -2342,15 +2425,16 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, goto out; fhp = tempfh; } - if (bmval0 & FATTR4_WORD0_ACL) { + if ((bmval0 & FATTR4_WORD0_ACL) || (bmval1 & FATTR4_WORD1_DACL)) { acl = nfsd4_get_acl(rqstp, dentry); if (IS_ERR(acl)) { err = PTR_ERR(acl); acl = NULL; } - if (err == -EOPNOTSUPP) + if (err == -EOPNOTSUPP) { bmval0 &= ~FATTR4_WORD0_ACL; - else if (err == -EINVAL) { + bmval1 &= ~FATTR4_WORD1_DACL; + } else if (err == -EINVAL) { status = nfserr_attrnotsupp; goto out; } else if (err != 0) @@ -2389,6 +2473,8 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, if (!IS_ACL(d_inode(dentry))) word0 &= ~FATTR4_WORD0_ACL; + if (!IS_RICHACL(d_inode(dentry))) + word1 &= ~FATTR4_WORD1_DACL; if (!contextsupport) word2 &= ~FATTR4_WORD2_SECURITY_LABEL; if (!word2) { @@ -2502,35 +2588,12 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, *p++ = cpu_to_be32(rdattr_err); } if (bmval0 & FATTR4_WORD0_ACL) { - struct richace *ace; - - if (acl == NULL) { - p = xdr_reserve_space(xdr, 4); - if (!p) - goto out_resource; - - *p++ = cpu_to_be32(0); - goto out_acl; - } - p = xdr_reserve_space(xdr, 4); - if (!p) - goto out_resource; - *p++ = cpu_to_be32(acl->a_count); - - richacl_for_each_entry(ace, acl) { - p = xdr_reserve_space(xdr, 4*3); - if (!p) - goto out_resource; - *p++ = cpu_to_be32(ace->e_type); - *p++ = cpu_to_be32(ace->e_flags & - ~(RICHACE_SPECIAL_WHO | RICHACE_INHERITED_ACE)); - *p++ = cpu_to_be32(ace->e_mask & NFS4_ACE_MASK_ALL); - status = nfsd4_encode_ace_who(xdr, rqstp, ace); - if (status) - goto out; - } + status = nfsd4_encode_acl_entries(xdr, acl, rqstp, + ~NFS4_ACE_INHERITED_ACE, + nfsd4_ace_mask(minorversion)); + if (status) + goto out; } -out_acl: if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { p = xdr_reserve_space(xdr, 4); if (!p) @@ -2746,6 +2809,16 @@ out_acl: } p = xdr_encode_hyper(p, ino); } + if (bmval1 & FATTR4_WORD1_DACL) { + p = xdr_reserve_space(xdr, 4); + if (!p) + goto out_resource; + *p++ = cpu_to_be32(acl->a_flags); + status = nfsd4_encode_acl_entries(xdr, acl, rqstp, + ~0, nfsd4_ace_mask(minorversion)); + if (status) + goto out; + } #ifdef CONFIG_NFSD_PNFS if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type); diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h index cf98052..cb5c3ed 100644 --- a/fs/nfsd/nfsd.h +++ b/fs/nfsd/nfsd.h @@ -339,7 +339,8 @@ void nfsd_lockd_shutdown(void); NFSD4_SUPPORTED_ATTRS_WORD0 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ - (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1) + (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1 | \ + FATTR4_WORD1_DACL) #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \ @@ -386,7 +387,8 @@ static inline u32 nfsd_suppattrs2(u32 minorversion) (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL) #define NFSD_WRITEABLE_ATTRS_WORD1 \ (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ - | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) + | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET \ + | FATTR4_WORD1_DACL) #ifdef CONFIG_NFSD_V4_SECURITY_LABEL #define NFSD_WRITEABLE_ATTRS_WORD2 FATTR4_WORD2_SECURITY_LABEL #else diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index 1422fc6..682ced3 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -394,6 +394,7 @@ enum lock_type4 { #define FATTR4_WORD1_TIME_MODIFY (1UL << 21) #define FATTR4_WORD1_TIME_MODIFY_SET (1UL << 22) #define FATTR4_WORD1_MOUNTED_ON_FILEID (1UL << 23) +#define FATTR4_WORD1_DACL (1UL << 26) #define FATTR4_WORD1_FS_LAYOUT_TYPES (1UL << 30) #define FATTR4_WORD2_LAYOUT_TYPES (1UL << 0) #define FATTR4_WORD2_LAYOUT_BLKSIZE (1UL << 1) diff --git a/include/uapi/linux/nfs4.h b/include/uapi/linux/nfs4.h index 2b871e0..b850ffd 100644 --- a/include/uapi/linux/nfs4.h +++ b/include/uapi/linux/nfs4.h @@ -121,7 +121,8 @@ #define NFS4_ACE_GENERIC_READ 0x00120081 #define NFS4_ACE_GENERIC_WRITE 0x00160106 #define NFS4_ACE_GENERIC_EXECUTE 0x001200A0 -#define NFS4_ACE_MASK_ALL 0x001F01FF +#define NFS40_ACE_MASK_ALL 0x001F01FF +#define NFS4_ACE_MASK_ALL 0x001F07FF #define EXCHGID4_FLAG_SUPP_MOVED_REFER 0x00000001 #define EXCHGID4_FLAG_SUPP_MOVED_MIGR 0x00000002