From: Andreas Gruenbacher Subject: [PATCH v12 49/49] nfs: Add support for the v4.1 dacl attribute Date: Fri, 23 Oct 2015 20:42:02 +0200 Message-ID: <1445625722-13791-50-git-send-email-agruenba@redhat.com> References: <1445625722-13791-1-git-send-email-agruenba@redhat.com> Cc: Andreas Gruenbacher To: Alexander Viro , "Theodore Ts'o" , Andreas Dilger , "J. Bruce Fields" , Jeff Layton , Trond Myklebust , Anna Schumaker , Dave Chinner , linux-ext4@vger.kernel.org, xfs@oss.sgi.com, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-api@vger.kernel.org Return-path: In-Reply-To: <1445625722-13791-1-git-send-email-agruenba@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org The dacl attribute includes Automatic Inheritance flags not supported by the acl attribute. it is only supported in NFS version 4.1 and higher. On systems where NFS version 4.0 is still the default, an additional mount option is needed: mount -t nfs4 -o vers=4.1 [...] Signed-off-by: Andreas Gruenbacher --- fs/nfs/nfs4proc.c | 2 +- fs/nfs/nfs4xdr.c | 54 ++++++++++++++++++++++++++++++++++++++++++------- include/linux/nfs_xdr.h | 2 +- 3 files changed, 49 insertions(+), 9 deletions(-) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 7bb2dea..191369f 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -4556,7 +4556,7 @@ static struct richacl *__nfs4_get_acl_uncached(struct inode *inode) struct nfs_server *server = NFS_SERVER(inode); struct page *pages[DIV_ROUND_UP(NFS4ACL_SIZE_MAX, PAGE_SIZE)] = {}; struct nfs_getaclargs args = { - .fh = NFS_FH(inode), + .inode = inode, .acl_pages = pages, .acl_len = ARRAY_SIZE(pages) * PAGE_SIZE, }; diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 2f1d6be..a73f7c6 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -1661,9 +1661,16 @@ encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compoun encode_nfs4_stateid(xdr, &zero_stateid); /* Encode attribute bitmap. */ - p = reserve_space(xdr, 2*4); - *p++ = cpu_to_be32(1); - *p = cpu_to_be32(FATTR4_WORD0_ACL); + if (arg->server->attr_bitmask[1] & FATTR4_WORD1_DACL) { + p = reserve_space(xdr, 3*4); + *p++ = cpu_to_be32(2); + *p++ = 0; + *p = cpu_to_be32(FATTR4_WORD1_DACL); + } else { + p = reserve_space(xdr, 2*4); + *p++ = cpu_to_be32(1); + *p = cpu_to_be32(FATTR4_WORD0_ACL); + } attrlen_offset = xdr->buf->len; xdr_reserve_space(xdr, 4); /* to be backfilled later */ @@ -2498,9 +2505,12 @@ static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr, encode_compound_hdr(xdr, req, &hdr); encode_sequence(xdr, &args->seq_args, &hdr); - encode_putfh(xdr, args->fh, &hdr); + encode_putfh(xdr, NFS_FH(args->inode), &hdr); replen = hdr.replen + op_decode_hdr_maxsz + 1; - encode_getattr_two(xdr, FATTR4_WORD0_ACL, FATTR4_WORD1_MODE, &hdr); + if (NFS_SERVER(args->inode)->attr_bitmask[1] & FATTR4_WORD1_DACL) + encode_getattr_two(xdr, 0, FATTR4_WORD1_MODE | FATTR4_WORD1_DACL, &hdr); + else + encode_getattr_two(xdr, FATTR4_WORD0_ACL, FATTR4_WORD1_MODE, &hdr); xdr_inline_pages(&req->rq_rcv_buf, replen << 2, args->acl_pages, 0, args->acl_len); @@ -5402,12 +5412,25 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U))) return -EIO; - if (likely(bitmap[0] & FATTR4_WORD0_ACL)) { + + if (bitmap[0] & FATTR4_WORD0_ACL) { + struct richace *ace; + + if (bitmap[1] & FATTR4_WORD1_DACL) + return -EIO; + acl = decode_acl_entries(xdr, res->server); if (IS_ERR(acl)) return PTR_ERR(acl); + + status = -EIO; + richacl_for_each_entry(ace, acl) { + if (ace->e_flags & RICHACE_INHERITED_ACE) + goto out; + } + bitmap[0] &= ~FATTR4_WORD0_ACL; - } else + } else if (!(bitmap[1] & FATTR4_WORD1_DACL)) return -EOPNOTSUPP; status = -EIO; @@ -5417,6 +5440,23 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, status = decode_attr_mode(xdr, bitmap, &res->mode); if (status < 0) goto out; + + if (bitmap[1] & FATTR4_WORD1_DACL) { + unsigned int flags; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + flags = be32_to_cpup(p); + + acl = decode_acl_entries(xdr, res->server); + if (IS_ERR(acl)) + return PTR_ERR(acl); + + acl->a_flags = flags; + bitmap[1] &= ~FATTR4_WORD1_DACL; + } status = 0; out: diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 337c341..9c2a078 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -695,7 +695,7 @@ struct nfs_setaclres { struct nfs_getaclargs { struct nfs4_sequence_args seq_args; - struct nfs_fh * fh; + struct inode * inode; size_t acl_len; struct page ** acl_pages; }; -- 2.5.0