Messages in this thread | | | Date | Wed, 18 Jun 2008 19:48:05 -0700 | From | Joel Becker <> | Subject | [RFC PATCHES] Re: Is configfs the right solution for configuration based fs? |
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On Tue, Jun 10, 2008 at 10:12:52AM +1000, Ben Nizette wrote: >
Thanks, Ben, for providing constructive comments. I know I replied later with some of the known issues. Here are some tentative solutions! (Why now, you ask? I just finished up something and had a free moment)
> What's the first one, sysfs..? ioctl (eww..)? I do think they solve > different problems, both have their place. IMHO sysfs is forced to do > configuration in some situations where it just doesn't fit. Prolly 'coz > sysfs have the easy __DEVICE_ATTR kinda macros where as configfs takes > more effort to get flying. <snip> > That and a bit of wider use would probably see configfs growing helper > macros like those which make sysfs attributes a piece of cake to > implement.
Ask, and ye shall receive. I've actually been meaning to look at this for a while. Please check out the branch configfs-attr-macros at my git tree. Actually, here is the configfs.h with macros, and configfs_example_macros.c using them. Let me know if this fits the bill.
[config-attr-macros:include/linux/configfs.h] http://oss.oracle.com/git/jlbec/linux-2.6.git/?p=jlbec/linux-2.6.git;a=blob;f=include/linux/configfs.h;h=8be4507ab98f49f43c5212cbafe62178df9a517b;hb=c085c60b185d7431935397e43a868325d8f1da6c
[config-attr-macros:Documentation/filesystems/configfs/configfs_example_macros.c] http://oss.oracle.com/git/jlbec/linux-2.6.git/?p=jlbec/linux-2.6.git;a=blob;f=Documentation/filesystems/configfs/configfs_example_macros.c;h=c2ece748abdf30a7d67dd9ea25c5e6ac93fbc005;hb=c085c60b185d7431935397e43a868325d8f1da6c
Compare and contrast with the original configfs_example.c (now configfs_example_explicit.c on that branch). The diff is available here: http://oss.oracle.com/git/jlbec/linux-2.6.git/?p=jlbec/linux-2.6.git;a=commitdiff;h=c085c60b185d7431935397e43a868325d8f1da6c
> And the trival problem that, ISTR, failing the make_group method always > reports -ENOMEM to userspace, no matter what the actual problem was. I > think I had a patch around to pass the error code from make_group back > up through to userspace, I wonder what happened to that...
I've also attacked this one. The change is in the make-item-errors branch. It's already scheduled for linux-next. Diff available here: http://oss.oracle.com/git/jlbec/linux-2.6.git/?p=jlbec/linux-2.6.git;a=commitdiff;h=34fbb494fecfd82bcbf9ed698ef305500228a84c
Joel
--
Life's Little Instruction Book #226
"When someone hugs you, let them be the first to let go."
Joel Becker Principal Software Developer Oracle E-mail: joel.becker@oracle.com Phone: (650) 506-8127
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