From owner-svn-src-all@freebsd.org Wed Apr 17 23:09:08 2019 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 92766157C015; Wed, 17 Apr 2019 23:09:08 +0000 (UTC) (envelope-from erj@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 31B4E97882; Wed, 17 Apr 2019 23:09:08 +0000 (UTC) (envelope-from erj@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id B5899E201; Wed, 17 Apr 2019 23:09:07 +0000 (UTC) (envelope-from erj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x3HN97kN077262; Wed, 17 Apr 2019 23:09:07 GMT (envelope-from erj@FreeBSD.org) Received: (from erj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x3HN96Cv077258; Wed, 17 Apr 2019 23:09:06 GMT (envelope-from erj@FreeBSD.org) Message-Id: <201904172309.x3HN96Cv077258@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: erj set sender to erj@FreeBSD.org using -f From: Eric Joyner Date: Wed, 17 Apr 2019 23:09:06 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r346338 - in stable/12: share/man/man9 sys/net sys/sys X-SVN-Group: stable-12 X-SVN-Commit-Author: erj X-SVN-Commit-Paths: in stable/12: share/man/man9 sys/net sys/sys X-SVN-Commit-Revision: 346338 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 31B4E97882 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.98 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.98)[-0.981,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Apr 2019 23:09:08 -0000 Author: erj Date: Wed Apr 17 23:09:06 2019 New Revision: 346338 URL: https://svnweb.freebsd.org/changeset/base/346338 Log: MFC r345312 iflib: mark isc_driver_version as constant From Jake: The iflib core never modifies the isc_driver_version string. Allow drivers to safely assign pointers to constant buffers by marking this parameter const. (Additional comment by erj: This also adds a new sysctl_add_oid macro, SYSCTL_ADD_CONST_STRING, for displaying const strings). Submitted by: Jacob Keller Reviewed by: erj@, gallatin@, jhb@ Sponsored by: Intel Corporation Differential Revision: https://reviews.freebsd.org/D19577 Modified: stable/12/share/man/man9/sysctl.9 stable/12/sys/net/iflib.c stable/12/sys/net/iflib.h stable/12/sys/sys/sysctl.h Directory Properties: stable/12/ (props changed) Modified: stable/12/share/man/man9/sysctl.9 ============================================================================== --- stable/12/share/man/man9/sysctl.9 Wed Apr 17 23:02:37 2019 (r346337) +++ stable/12/share/man/man9/sysctl.9 Wed Apr 17 23:09:06 2019 (r346338) @@ -43,6 +43,7 @@ .Nm SYSCTL_ADD_S32 , .Nm SYSCTL_ADD_S64 , .Nm SYSCTL_ADD_STRING , +.Nm SYSCTL_ADD_CONST_STRING , .Nm SYSCTL_ADD_STRUCT , .Nm SYSCTL_ADD_U8 , .Nm SYSCTL_ADD_U16 , @@ -70,6 +71,7 @@ .Nm SYSCTL_S32 , .Nm SYSCTL_S64 , .Nm SYSCTL_STRING , +.Nm SYSCTL_CONST_STRING , .Nm SYSCTL_STRUCT , .Nm SYSCTL_U8 , .Nm SYSCTL_U16 , @@ -225,6 +227,16 @@ .Fa "const char *descr" .Fc .Ft struct sysctl_oid * +.Fo SYSCTL_ADD_CONST_STRING +.Fa "struct sysctl_ctx_list *ctx" +.Fa "struct sysctl_oid_list *parent" +.Fa "int number" +.Fa "const char *name" +.Fa "int ctlflags" +.Fa "const char *ptr" +.Fa "const char *descr" +.Fc +.Ft struct sysctl_oid * .Fo SYSCTL_ADD_STRUCT .Fa "struct sysctl_ctx_list *ctx" .Fa "struct sysctl_oid_list *parent" @@ -351,6 +363,7 @@ .Fn SYSCTL_S32 parent number name ctlflags ptr val descr .Fn SYSCTL_S64 parent number name ctlflags ptr val descr .Fn SYSCTL_STRING parent number name ctlflags arg len descr +.Fn SYSCTL_CONST_STRING parent number name ctlflags arg descr .Fn SYSCTL_STRUCT parent number name ctlflags ptr struct_type descr .Fn SYSCTL_U8 parent number name ctlflags ptr val descr .Fn SYSCTL_U16 parent number name ctlflags ptr val descr @@ -512,6 +525,11 @@ If the .Fa len argument in zero, the string length is computed at every access to the OID using .Xr strlen 3 . +Use the +.Fn SYSCTL_CONST_STRING +macro or the +.Fn SYSCTL_ADD_CONST_STRING +function to add a sysctl for a constant string. .Sh CREATING OPAQUE SYSCTLS The .Fn SYSCTL_OPAQUE @@ -558,6 +576,7 @@ Static sysctls are declared using one of the .Fn SYSCTL_S32 , .Fn SYSCTL_S64 , .Fn SYSCTL_STRING , +.Fn SYSCTL_CONST_STRING , .Fn SYSCTL_STRUCT , .Fn SYSCTL_U8 , .Fn SYSCTL_U16 , @@ -583,6 +602,7 @@ Dynamic nodes are created using one of the .Fn SYSCTL_ADD_S32 , .Fn SYSCTL_ADD_S64 , .Fn SYSCTL_ADD_STRING , +.Fn SYSCTL_ADD_CONST_STRING , .Fn SYSCTL_ADD_STRUCT , .Fn SYSCTL_ADD_U8 , .Fn SYSCTL_ADD_U16 , Modified: stable/12/sys/net/iflib.c ============================================================================== --- stable/12/sys/net/iflib.c Wed Apr 17 23:02:37 2019 (r346337) +++ stable/12/sys/net/iflib.c Wed Apr 17 23:09:06 2019 (r346338) @@ -6244,8 +6244,8 @@ iflib_add_device_sysctl_pre(if_ctx_t ctx) CTLFLAG_RD, NULL, "IFLIB fields"); oid_list = SYSCTL_CHILDREN(node); - SYSCTL_ADD_STRING(ctx_list, oid_list, OID_AUTO, "driver_version", - CTLFLAG_RD, ctx->ifc_sctx->isc_driver_version, 0, + SYSCTL_ADD_CONST_STRING(ctx_list, oid_list, OID_AUTO, "driver_version", + CTLFLAG_RD, ctx->ifc_sctx->isc_driver_version, "driver version"); SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_ntxqs", Modified: stable/12/sys/net/iflib.h ============================================================================== --- stable/12/sys/net/iflib.h Wed Apr 17 23:02:37 2019 (r346337) +++ stable/12/sys/net/iflib.h Wed Apr 17 23:09:06 2019 (r346338) @@ -248,7 +248,7 @@ struct if_shared_ctx { /* fields necessary for probe */ pci_vendor_info_t *isc_vendor_info; - char *isc_driver_version; + const char *isc_driver_version; /* optional function to transform the read values to match the table*/ void (*isc_parse_devinfo) (uint16_t *device_id, uint16_t *subvendor_id, uint16_t *subdevice_id, uint16_t *rev_id); Modified: stable/12/sys/sys/sysctl.h ============================================================================== --- stable/12/sys/sys/sysctl.h Wed Apr 17 23:02:37 2019 (r346337) +++ stable/12/sys/sys/sysctl.h Wed Apr 17 23:09:06 2019 (r346338) @@ -351,6 +351,25 @@ TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry); NULL); \ }) +/* Oid for a constant '\0' terminated string. */ +#define SYSCTL_CONST_STRING(parent, nbr, name, access, arg, descr) \ + SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \ + __DECONST(char *, arg), 0, sysctl_handle_string, "A", descr); \ + CTASSERT(!(access & CTLFLAG_WR)); \ + CTASSERT(((access) & CTLTYPE) == 0 || \ + ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING) + +#define SYSCTL_ADD_CONST_STRING(ctx, parent, nbr, name, access, arg, descr) \ +({ \ + char *__arg = __DECONST(char *, arg); \ + CTASSERT(!(access & CTLFLAG_WR)); \ + CTASSERT(((access) & CTLTYPE) == 0 || \ + ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING); \ + sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access), \ + __arg, 0, sysctl_handle_string, "A", __DESCR(descr), \ + NULL); \ +}) + /* Oid for a bool. If ptr is NULL, val is returned. */ #define SYSCTL_NULL_BOOL_PTR ((bool *)NULL) #define SYSCTL_BOOL(parent, nbr, name, access, ptr, val, descr) \