From db145db021abf75aa1a5810e631425055cfbed47 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 14 May 2022 10:36:59 -0400 Subject: NFSv4: Add encoders/decoders for the NFSv4.1 dacl and sacl attributes Add the ability to set or retrieve the acl using the NFSv4.1 'dacl' and 'sacl' attributes to the NFSv4 xdr encoders/decoders. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/nfs4proc.c | 9 ++++-- fs/nfs/nfs4xdr.c | 95 ++++++++++++++++++++++++++++++++++++------------------- 2 files changed, 68 insertions(+), 36 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index e6c830d4db0b..b2ddbaf32a95 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -5911,9 +5911,11 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, struct page **pages; struct nfs_getaclargs args = { .fh = NFS_FH(inode), + .acl_type = type, .acl_len = buflen, }; struct nfs_getaclres res = { + .acl_type = type, .acl_len = buflen, }; struct rpc_message msg = { @@ -6028,9 +6030,10 @@ static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, struct nfs_server *server = NFS_SERVER(inode); struct page *pages[NFS4ACL_MAXPAGES]; struct nfs_setaclargs arg = { - .fh = NFS_FH(inode), - .acl_pages = pages, - .acl_len = buflen, + .fh = NFS_FH(inode), + .acl_type = type, + .acl_len = buflen, + .acl_pages = pages, }; struct nfs_setaclres res; struct rpc_message msg = { diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 86a5f6516928..0b41e00e754f 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -1680,19 +1680,35 @@ encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr) encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr); } -static void -encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg, - struct compound_hdr *hdr) +static void nfs4_acltype_to_bitmap(enum nfs4_acl_type type, __u32 bitmap[2]) { - __be32 *p; + switch (type) { + default: + bitmap[0] = FATTR4_WORD0_ACL; + bitmap[1] = 0; + break; + case NFS4ACL_DACL: + bitmap[0] = 0; + bitmap[1] = FATTR4_WORD1_DACL; + break; + case NFS4ACL_SACL: + bitmap[0] = 0; + bitmap[1] = FATTR4_WORD1_SACL; + } +} + +static void encode_setacl(struct xdr_stream *xdr, + const struct nfs_setaclargs *arg, + struct compound_hdr *hdr) +{ + __u32 bitmap[2]; + + nfs4_acltype_to_bitmap(arg->acl_type, bitmap); encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr); encode_nfs4_stateid(xdr, &zero_stateid); - p = reserve_space(xdr, 2*4); - *p++ = cpu_to_be32(1); - *p = cpu_to_be32(FATTR4_WORD0_ACL); - p = reserve_space(xdr, 4); - *p = cpu_to_be32(arg->acl_len); + xdr_encode_bitmap4(xdr, bitmap, ARRAY_SIZE(bitmap)); + encode_uint32(xdr, arg->acl_len); xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len); } @@ -2587,11 +2603,11 @@ static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr, struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - const __u32 nfs4_acl_bitmap[1] = { - [0] = FATTR4_WORD0_ACL, - }; + __u32 nfs4_acl_bitmap[2]; uint32_t replen; + nfs4_acltype_to_bitmap(args->acl_type, nfs4_acl_bitmap); + encode_compound_hdr(xdr, req, &hdr); encode_sequence(xdr, &args->seq_args, &hdr); encode_putfh(xdr, args->fh, &hdr); @@ -5386,7 +5402,7 @@ decode_restorefh(struct xdr_stream *xdr) } static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, - struct nfs_getaclres *res) + struct nfs_getaclres *res, enum nfs4_acl_type type) { unsigned int savep; uint32_t attrlen, @@ -5404,26 +5420,39 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) goto out; - if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U))) - return -EIO; - if (likely(bitmap[0] & FATTR4_WORD0_ACL)) { - - /* The bitmap (xdr len + bitmaps) and the attr xdr len words - * are stored with the acl data to handle the problem of - * variable length bitmaps.*/ - res->acl_data_offset = xdr_page_pos(xdr); - res->acl_len = attrlen; - - /* Check for receive buffer overflow */ - if (res->acl_len > xdr_stream_remaining(xdr) || - res->acl_len + res->acl_data_offset > xdr->buf->page_len) { - res->acl_flags |= NFS4_ACL_TRUNC; - dprintk("NFS: acl reply: attrlen %u > page_len %zu\n", - attrlen, xdr_stream_remaining(xdr)); - } - } else - status = -EOPNOTSUPP; + switch (type) { + default: + if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U))) + return -EIO; + if (!(bitmap[0] & FATTR4_WORD0_ACL)) + return -EOPNOTSUPP; + break; + case NFS4ACL_DACL: + if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_DACL - 1U))) + return -EIO; + if (!(bitmap[1] & FATTR4_WORD1_DACL)) + return -EOPNOTSUPP; + break; + case NFS4ACL_SACL: + if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_SACL - 1U))) + return -EIO; + if (!(bitmap[1] & FATTR4_WORD1_SACL)) + return -EOPNOTSUPP; + } + /* The bitmap (xdr len + bitmaps) and the attr xdr len words + * are stored with the acl data to handle the problem of + * variable length bitmaps.*/ + res->acl_data_offset = xdr_page_pos(xdr); + res->acl_len = attrlen; + + /* Check for receive buffer overflow */ + if (res->acl_len > xdr_stream_remaining(xdr) || + res->acl_len + res->acl_data_offset > xdr->buf->page_len) { + res->acl_flags |= NFS4_ACL_TRUNC; + dprintk("NFS: acl reply: attrlen %u > page_len %zu\n", + attrlen, xdr_stream_remaining(xdr)); + } out: return status; } @@ -6486,7 +6515,7 @@ nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr, status = decode_putfh(xdr); if (status) goto out; - status = decode_getacl(xdr, rqstp, res); + status = decode_getacl(xdr, rqstp, res, res->acl_type); out: return status; -- cgit v1.2.3