Re: [RFC] f_pos in readdir() (was Re: [RFC][PATCH] vfs: always protect diretory file->fpos with inode mutex)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



> As for ->readdir(), I'd like to resurrect an old proposal to change the ABI
> of that sucker.  Quoting the thread from 4 years ago:

I'd love to see the readdir() interface cleaned up, yes please.

> Comments?

Hmm.  Do we want to think about letting callers copy the name to
userspace in fragments?

I was looking at current readdir paths and saw that btrfs has an
annoying wrinkle that its directory entries might be in large blocks
that span disjoint pages.  So it copies them to a kmalloced()ed buffer
to pass to filldir().

Maybe it wouldn't be worth having to track incomplete entries in the
core, but it'd be nice to get rid of this copy in btrfs.

(btrfs could also be more clever and only do this dance when the name
really does span pages.. it's very rare. :/).

- z
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Reiser Filesystem Development]     [Ceph FS]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Linux FS]     [Yosemite National Park]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Device Mapper]     [Linux Media]

  Powered by Linux