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Date: Mon, 14 Sep 2009 12:57:40 -0700
From: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To: Boaz Harrosh <bharrosh@...asas.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
linux-scsi <linux-scsi@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Greg KH <greg@...ah.com>,
Douglas Gilbert <dgilbert@...erlog.com>,
James Bottomley <James.Bottomley@...senPartnership.com>,
Hannes Reinecke <hare@...e.de>,
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
Mike Christie <michaelc@...wisc.edu>,
Joel Becker <joel.becker@...cle.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Christoph Hellwig <hch@....de>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Alan Stern <stern@...land.harvard.edu>,
Florian Haas <florian.haas@...bit.com>,
Philipp Reisner <philipp.reisner@...bit.com>
Subject: Re: [RFC PATCH 19/19] Target_Core_Mod Makefile/Kconfig and div64.c
On Sun, 2009-09-13 at 12:51 +0300, Boaz Harrosh wrote:
> On 09/12/2009 04:58 AM, Nicholas A. Bellinger wrote:
> > [RFC PATCH 19/19] Target_Core_Mod Makefile/Kconfig and div64.c
> >
> > This patch adds the remaining misc Makefile and Kconfig changes
> >
> > It also has wrappers for unsigned long division in div64c, that will be converted to
> > include/asm-generic/div64.h
> >
> > Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
> > diff --git a/drivers/target/div64.c b/drivers/target/div64.c
> > new file mode 100644
> > index 0000000..6d59864
> > --- /dev/null
> > +++ b/drivers/target/div64.c
> > @@ -0,0 +1,16 @@
> > +#include <asm/types.h>
> > +#include <asm/div64.h>
> > +
> > +#if BITS_PER_LONG == 32
> > +
> > +u64 __udivdi3(u64 a, u64 b)
> > +{
> > + do_div(a, b);
> > + return a;
> > +}
> > +
> > +u64 __umoddi3(u64 a, u64 b)
> > +{
> > + return do_div(a, b);
> > +}
> > +#endif
> > diff --git a/drivers/target/Makefile b/drivers/target/Makefile
>
> I like Kbuild better then Makefile. And so does the Kernel documentation.
> It says new code should use Kbuild
>
> > new file mode 100644
> > index 0000000..3e413b0
> > --- /dev/null
> > +++ b/drivers/target/Makefile
> > @@ -0,0 +1,96 @@
> > +CWD=$(shell pwd)
> > +
> > +PYX_ISCSI_VENDOR ?="Linux-iSCSI.org"
> > +
> > +# Transport Plugins and Devices.
> > + #
> > +LINUX_PARALLEL_SCSI ?= 1
> > +LINUX_STGT ?= 1
> > +LINUX_SCSI_MEDIA_ROM ?= 1
> > +LINUX_PARALLEL_ATA ?= 0
> > +LINUX_IBLOCK ?= 1
> > +LINUX_RAMDISK ?= 1
> > +LINUX_FILEIO ?= 1
> > +
> > +LINUX_VPD_PAGE_CHECK?=1
> > +LIO_TARGET_CONFIGFS?=1
> > +
> > +MODVER ?= 1
> > +USEGDB ?= 1
> > +DEBUG_DEV ?= 0
> > +SNMP_FEATURE ?= 1
> > +
>
> Now when in-Kernel don't you need to use Kconfig for all this "configuration".
>
> What's with the re-invent the wheel, here.
Ok, I will move all of these config items into Kbuild
>
> > +obj-$(CONFIG_TARGET_CORE) += target_core_mod.o
> > +target_core_mod-objs := target_core_configfs.o \
> > + target_core_device.o \
> > + target_core_hba.o \
> > + target_core_plugin.o \
> > + target_core_pr.o \
> > + target_core_alua.o \
> > + target_core_scdb.o \
> > + target_core_seobj.o \
> > + target_core_tmr.o \
> > + target_core_tpg.o \
> > + target_core_transport.o \
> > + target_core_ua.o \
> > + div64.o
> > +
> > +ifeq ($(LINUX_IBLOCK), 1)
> > +target_core_mod-objs += target_core_iblock.o
> > +EXTRA_CFLAGS += -DPYX_IBLOCK
> > +endif
> > +ifeq ($(LINUX_PARALLEL_SCSI), 1)
> > +target_core_mod-objs += target_core_pscsi.o
> > +EXTRA_CFLAGS += -DPARALLEL_SCSI
> > +endif
> > +ifeq ($(LINUX_STGT), 1)
> > +target_core_mod-objs += target_core_stgt.o
> > +EXTRA_CFLAGS += -DSTGT_PLUGIN
> > +endif
> > +ifeq ($(LINUX_RAMDISK), 1)
> > +target_core_mod-objs += target_core_rd.o
> > +EXTRA_CFLAGS += -DPYX_RAMDISK
> > +endif
> > +ifeq ($(LINUX_FILEIO), 1)
> > +target_core_mod-objs += target_core_file.o
> > +EXTRA_CFLAGS += -DPYX_FILEIO
> > +endif
> > +ifeq ($(SNMP_FEATURE), 1)
> > +target_core_mod-objs += target_core_mib.o
> > +EXTRA_CFLAGS += -DSNMP_SUPPORT
> > +endif
> > +ifeq ($(LINUX_VPD_PAGE_CHECK), 1)
> > +EXTRA_CFLAGS += -DLINUX_VPD_PAGE_CHECK
> > +endif
> > +ifeq ($(LINUX_SCSI_MEDIA_ROM), 1)
> > +EXTRA_CFLAGS += -DLINUX_SCSI_MEDIA_ROM
> > +endif
> > +ifeq ($(DEBUG_DEV), 1)
> > +EXTRA_CFLAGS += -DDEBUG_DEV
> > +endif
> > +
>
> You see what I mean. Try with Kconfig variables all this disappears.
Understood.
>
> > +
> > +EXTRA_CFLAGS+=-I$(CWD)/drivers/target/ -I$(CWD)/drivers/scsi/
> > +EXTRA_CFLAGS+=-D_TARGET -DLINUX -DLINUX_KERNEL_26 -DLINUX_SCSI_HOST_LOCK -DLINUX_USE_SIGHAND
>
> ?? are you sure
>
> > +EXTRA_CFLAGS+=-DLINUX_SCATTERLIST_HAS_PAGE -DPYX_ISCSI_VENDOR='"Linux-iSCSI.org"'
>
> And these are for ??
>
Ok, these are some legacy items that I missed, and can be safely
removed..
> <Makefile>
> > +
> > +all:
> > + $(MAKE) -C $(KERNEL_DIR) SUBDIRS=$(CWD) modules CWD=$(CWD) ARCH=$(ARCH) KBUILD_VERBOSE=0
> > +
> > +install ins:
> > + rm -f /lib/modules/`uname -r`/kernel/drivers/scsi/iscsi_target_mod.ko
> > + rm -f /lib/modules/`uname -r`/kernel/drivers/iscsi/iscsi_target_mod.ko
> > + mkdir -p /lib/modules/`uname -r`/kernel/drivers/iscsi
> > + cp -f iscsi_target_mod.ko /lib/modules/`uname -r`/kernel/drivers/iscsi
> > + cp -f target_core_mod.ko /lib/modules/`uname -r`/kernel/drivers/iscsi
> > + depmod -ae
> > +
> > +
> > +
> > +clean:
> > + rm -f $(foreach prog,$(target_core_mod-objs) $(obj-m),$(CWD)/$(prog)) $(CWD)/target_core_mod.mod.o
> > + rm -f target_core_mod.ko target_core_mod.mod.c
> > + rm -f .*.cmd ../common/.*.cmd .make_autoconfig *~
> > + rm -fr .tmp_versions
> > +
> </Makefile>
>
> OK this should go in a Makefile and kept out-of-tree
Ok, Got it
>
> > +
> > diff --git a/drivers/target/Kconfig b/drivers/target/Kconfig
> > new file mode 100644
> > index 0000000..04564f1
> > --- /dev/null
> > +++ b/drivers/target/Kconfig
> > @@ -0,0 +1,7 @@
> > +config TARGET_CORE
> > + tristate "Generic Target Core Engine and ConfigFS Infrastructure"
> > + select CONFIGFS_FS
> > + select SCSI_TGT
> > + default m
> > + ---help---
> > + Say Y here to enable the Storage Engine, Subsystem Plugins, and ConfigFS enabled control path for the Generic Target Engine.
> >
> >
>
> Lots of more configs missing here
>
Thanks for your comments Boaz!
--nab
> Cheers
> Boaz
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