struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type) { struct nfs_server *server = NFS_SERVER(inode); struct nfs_fattr fattr; struct page *pages[NFSACL_MAXPAGES] = { }; struct nfs3_getaclargs args = { .fh = NFS_FH(inode), /* The xdr layer may allocate pages here. */ .pages = pages, }; struct nfs3_getaclres res = { .fattr = &fattr, }; struct rpc_message msg = { .rpc_argp = &args, .rpc_resp = &res, }; struct posix_acl *acl; int status, count; if (!nfs_server_capable(inode, NFS_CAP_ACLS)) return ERR_PTR(-EOPNOTSUPP); status = nfs_revalidate_inode(server, inode); if (status < 0) return ERR_PTR(status); if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) nfs_zap_acl_cache(inode); acl = nfs3_get_cached_acl(inode, type); if (acl != ERR_PTR(-EAGAIN)) return acl; acl = NULL; /* * Only get the access acl when explicitly requested: We don't * need it for access decisions, and only some applications use * it. Applications which request the access acl first are not * penalized from this optimization. */ if (type == ACL_TYPE_ACCESS) args.mask |= NFS_ACLCNT|NFS_ACL; if (S_ISDIR(inode->i_mode)) args.mask |= NFS_DFACLCNT|NFS_DFACL; if (args.mask == 0) return NULL; dprintk("NFS call getacl\n"); msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_GETACL]; nfs_fattr_init(&fattr); status = rpc_call_sync(server->client_acl, &msg, 0); dprintk("NFS reply getacl: %d\n", status); /* pages may have been allocated at the xdr layer. */ for (count = 0; count < NFSACL_MAXPAGES && args.pages[count]; count++) __free_page(args.pages[count]); switch (status) { case 0: status = nfs_refresh_inode(inode, &fattr); break; case -EPFNOSUPPORT: case -EPROTONOSUPPORT: dprintk("NFS_V3_ACL extension not supported; disabling\n"); server->caps &= ~NFS_CAP_ACLS; case -ENOTSUPP: status = -EOPNOTSUPP; default: goto getout; } if ((args.mask & res.mask) != args.mask) { status = -EIO; goto getout; } if (res.acl_access != NULL) { if (posix_acl_equiv_mode(res.acl_access, NULL) == 0) { posix_acl_release(res.acl_access); res.acl_access = NULL; } } nfs3_cache_acls(inode, (res.mask & NFS_ACL) ? res.acl_access : ERR_PTR(-EINVAL), (res.mask & NFS_DFACL) ? res.acl_default : ERR_PTR(-EINVAL)); switch(type) { case ACL_TYPE_ACCESS: acl = res.acl_access; res.acl_access = NULL; break; case ACL_TYPE_DEFAULT: acl = res.acl_default; res.acl_default = NULL; } getout: posix_acl_release(res.acl_access); posix_acl_release(res.acl_default); if (status != 0) { posix_acl_release(acl); acl = ERR_PTR(status); } return acl; }
static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, struct posix_acl *dfacl) { struct nfs_server *server = NFS_SERVER(inode); struct nfs_fattr fattr; struct page *pages[NFSACL_MAXPAGES] = { }; struct nfs3_setaclargs args = { .inode = inode, .mask = NFS_ACL, .acl_access = acl, .pages = pages, }; struct rpc_message msg = { .rpc_argp = &args, .rpc_resp = &fattr, }; int status, count; status = -EOPNOTSUPP; if (!nfs_server_capable(inode, NFS_CAP_ACLS)) goto out; /* We are doing this here, because XDR marshalling can only return -ENOMEM. */ status = -ENOSPC; if (acl != NULL && acl->a_count > NFS_ACL_MAX_ENTRIES) goto out; if (dfacl != NULL && dfacl->a_count > NFS_ACL_MAX_ENTRIES) goto out; if (S_ISDIR(inode->i_mode)) { args.mask |= NFS_DFACL; args.acl_default = dfacl; } dprintk("NFS call setacl\n"); nfs_begin_data_update(inode); msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_SETACL]; status = rpc_call_sync(server->client_acl, &msg, 0); spin_lock(&inode->i_lock); NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS; spin_unlock(&inode->i_lock); nfs_end_data_update(inode); dprintk("NFS reply setacl: %d\n", status); /* pages may have been allocated at the xdr layer. */ for (count = 0; count < NFSACL_MAXPAGES && args.pages[count]; count++) __free_page(args.pages[count]); switch (status) { case 0: status = nfs_refresh_inode(inode, &fattr); nfs3_cache_acls(inode, acl, dfacl); break; case -EPFNOSUPPORT: case -EPROTONOSUPPORT: dprintk("NFS_V3_ACL SETACL RPC not supported" "(will not retry)\n"); server->caps &= ~NFS_CAP_ACLS; case -ENOTSUPP: status = -EOPNOTSUPP; } out: return status; }