Date: Tue, 19 Mar 2019 23:44:26 +0000 (UTC) From: Eric Joyner <erj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r345312 - in head: share/man/man9 sys/net sys/sys Message-ID: <201903192344.x2JNiQrn055852@repo.freebsd.org>
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Author: erj Date: Tue Mar 19 23:44:26 2019 New Revision: 345312 URL: https://svnweb.freebsd.org/changeset/base/345312 Log: 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. Submitted by: Jacob Keller <jacob.e.keller@intel.com> Reviewed by: erj@, gallatin@, jhb@ MFC after: 1 week Sponsored by: Intel Corporation Differential Revision: https://reviews.freebsd.org/D19577 Modified: head/share/man/man9/sysctl.9 head/sys/net/iflib.c head/sys/net/iflib.h head/sys/sys/sysctl.h Modified: head/share/man/man9/sysctl.9 ============================================================================== --- head/share/man/man9/sysctl.9 Tue Mar 19 21:46:21 2019 (r345311) +++ head/share/man/man9/sysctl.9 Tue Mar 19 23:44:26 2019 (r345312) @@ -48,6 +48,7 @@ .Nm SYSCTL_ADD_SBINTIME_MSEC , .Nm SYSCTL_ADD_SBINTIME_USEC , .Nm SYSCTL_ADD_STRING , +.Nm SYSCTL_ADD_CONST_STRING , .Nm SYSCTL_ADD_STRUCT , .Nm SYSCTL_ADD_U8 , .Nm SYSCTL_ADD_U16 , @@ -82,6 +83,7 @@ .Nm SYSCTL_SBINTIME_MSEC , .Nm SYSCTL_SBINTIME_USEC , .Nm SYSCTL_STRING , +.Nm SYSCTL_CONST_STRING , .Nm SYSCTL_STRUCT , .Nm SYSCTL_U8 , .Nm SYSCTL_U16 , @@ -291,6 +293,16 @@ .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" @@ -443,6 +455,7 @@ .Fn SYSCTL_SBINTIME_MSEC parent number name ctlflags ptr descr .Fn SYSCTL_SBINTIME_USEC parent number name ctlflags ptr 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 @@ -607,6 +620,11 @@ 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 @@ -658,6 +676,7 @@ Static sysctls are declared using one of the .Fn SYSCTL_SBINTIME_MSEC , .Fn SYSCTL_SBINTIME_USEC , .Fn SYSCTL_STRING , +.Fn SYSCTL_CONST_STRING , .Fn SYSCTL_STRUCT , .Fn SYSCTL_U8 , .Fn SYSCTL_U16 , @@ -690,6 +709,7 @@ Dynamic nodes are created using one of the .Fn SYSCTL_ADD_SBINTIME_MSEC , .Fn SYSCTL_ADD_SBINTIME_USEC , .Fn SYSCTL_ADD_STRING , +.Fn SYSCTL_ADD_CONST_STRING , .Fn SYSCTL_ADD_STRUCT , .Fn SYSCTL_ADD_U8 , .Fn SYSCTL_ADD_U16 , Modified: head/sys/net/iflib.c ============================================================================== --- head/sys/net/iflib.c Tue Mar 19 21:46:21 2019 (r345311) +++ head/sys/net/iflib.c Tue Mar 19 23:44:26 2019 (r345312) @@ -6257,8 +6257,8 @@ 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: head/sys/net/iflib.h ============================================================================== --- head/sys/net/iflib.h Tue Mar 19 21:46:21 2019 (r345311) +++ head/sys/net/iflib.h Tue Mar 19 23:44:26 2019 (r345312) @@ -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: head/sys/sys/sysctl.h ============================================================================== --- head/sys/sys/sysctl.h Tue Mar 19 21:46:21 2019 (r345311) +++ head/sys/sys/sysctl.h Tue Mar 19 23:44:26 2019 (r345312) @@ -354,6 +354,25 @@ 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) \
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