From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin-patches@cygwin.com
Subject: Re: [PATCH 01/11] syscalls.cc: unlink_nt: Try FILE_DISPOSITION_IGNORE_READONLY_ATTRIBUTE first
Date: Mon, 18 Jan 2021 15:39:34 +0100 [thread overview]
Message-ID: <20210118143934.GG59030@calimero.vinschen.de> (raw)
In-Reply-To: <51b3e03d-9a97-d83f-1858-751a9a51394e@wijen.net>
On Jan 18 15:30, Ben wrote:
>
>
> On 18-01-2021 13:22, Corinna Vinschen via Cygwin-patches wrote:
> > On Jan 18 13:11, Ben wrote:
> >>
> >>
> >> On 18-01-2021 11:45, Corinna Vinschen via Cygwin-patches wrote:
> >>> Rather than calling NtSetInformationFile here again, we should rather
> >>> just skip the transaction stuff on 1809 and later. I'd suggest adding
> >>> another wincap flag like, say, "has_posix_ro_override", being true
> >>> for 1809 and later. Then we can skip the transaction handling if
> >>> wincap.has_posix_ro_override () and just add the
> >>> FILE_DISPOSITION_IGNORE_READONLY_ATTRIBUTE flag to fdie.Flags, if
> >>> it's available.
> >>
> >> Hmmm, I'm not sure if I follow you: This extra NtSetInformationFile is not
> >> related to the transaction stuff?
> >
> > Right, sorry. I meant the
> >
> > if (pc.file_attributes () & FILE_ATTRIBUTE_READONLY)
> >
> > bracketed code in fact. What I meant is to keep it at
> >
> > open
> > if (ro)
> > setattributes
> > setinformation
> > ...
> >
> > and only add the required additional flag.
>
> Ah, yes I understand. The extra NtSetInformation was there for
> the fallback without FILE_DISPOSITION_IGNORE_READONLY_ATTRIBUTE
>
> I have seen bordercases, but I have not seen NtSetInformation fail
> FILE_DISPOSITION_IGNORE_READONLY_ATTRIBUTE and succeed without.
> Even if it would, Your suggestion does save a bunch of code...
>
> >
> >
> >> Also I have seen NtSetInformationFile fail with STATUS_INVALID_PARAMETER.
> >
> > That should only occur on pre-1809 then, and adding the extra wincap
> > would fix that.
>
> Do note: This can also happen post-1809 with a driver that hasn't implemented it yet.
I'm sure, but that code path is called on non-remote ntfs only anyway.
Corinna
next prev parent reply other threads:[~2021-01-18 14:39 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-15 13:45 [PATCH 00/11] Improve rm speed Ben Wijen
2021-01-15 13:45 ` [PATCH 01/11] syscalls.cc: unlink_nt: Try FILE_DISPOSITION_IGNORE_READONLY_ATTRIBUTE first Ben Wijen
2021-01-18 10:25 ` Corinna Vinschen
2021-01-18 10:45 ` Corinna Vinschen
2021-01-18 12:11 ` Ben
2021-01-18 12:22 ` Corinna Vinschen
2021-01-18 14:30 ` Ben
2021-01-18 14:39 ` Corinna Vinschen [this message]
2021-01-18 14:59 ` Ben
2021-01-15 13:45 ` [PATCH 02/11] syscalls.cc: Deduplicate _remove_r Ben Wijen
2021-01-18 10:56 ` Corinna Vinschen
2021-01-18 12:40 ` Ben
2021-01-18 13:04 ` Corinna Vinschen
2021-01-18 13:51 ` Ben
2021-01-18 14:49 ` Corinna Vinschen
2021-01-18 14:58 ` Ben
2021-01-15 13:45 ` [PATCH 03/11] syscalls.cc: Fix num_links Ben Wijen
2021-01-18 11:01 ` Corinna Vinschen
2021-01-15 13:45 ` [PATCH 04/11] syscalls.cc: Use EISDIR Ben Wijen
2021-01-18 11:06 ` Corinna Vinschen
2021-01-15 13:45 ` [PATCH 05/11] Cygwin: Move post-dir unlink check Ben Wijen
2021-01-18 11:08 ` Corinna Vinschen
2021-01-18 14:31 ` Ben
2021-01-18 14:52 ` Corinna Vinschen
2021-01-15 13:45 ` [PATCH 06/11] cxx.cc: Fix dynamic initialization for static local variables Ben Wijen
2021-01-18 11:33 ` Corinna Vinschen
2021-01-15 13:45 ` [PATCH 07/11] syscalls.cc: Implement non-path_conv dependent _unlink_nt Ben Wijen
2021-01-18 10:51 ` Ben
2021-01-15 13:45 ` [PATCH 08/11] path.cc: Allow to skip filesystem checks Ben Wijen
2021-01-18 11:36 ` Corinna Vinschen
2021-01-18 17:15 ` Ben
2021-01-19 9:25 ` Corinna Vinschen
2021-01-15 13:45 ` [PATCH 09/11] mount.cc: Implement poor-man's cache Ben Wijen
2021-01-18 11:51 ` Corinna Vinschen
2021-02-03 11:38 ` Ben
2021-02-04 19:37 ` Corinna Vinschen
2021-01-15 13:45 ` [PATCH 10/11] syscalls.cc: Expose shallow-pathconv unlink_nt Ben Wijen
2021-01-15 13:45 ` [PATCH 11/11] dir.cc: Try unlink_nt first Ben Wijen
2021-01-18 12:13 ` Corinna Vinschen
2021-01-18 17:07 ` Ben
2021-01-18 17:18 ` Ben
2021-01-19 9:54 ` Corinna Vinschen
2021-01-20 16:10 ` [PATCH v2 0/8] Improve rm speed Ben Wijen
2021-01-20 16:10 ` [PATCH v2 1/8] syscalls.cc: unlink_nt: Try FILE_DISPOSITION_IGNORE_READONLY_ATTRIBUTE Ben Wijen
2021-01-22 10:52 ` Corinna Vinschen
2021-01-22 15:47 ` [PATCH v3 " Ben Wijen
2021-01-25 10:30 ` Corinna Vinschen
2021-01-20 16:10 ` [PATCH v2 2/8] syscalls.cc: Deduplicate remove Ben Wijen
2021-01-22 12:22 ` Corinna Vinschen
2021-01-22 15:47 ` [PATCH v3 " Ben Wijen
2021-01-25 18:58 ` Corinna Vinschen
2021-01-20 16:10 ` [PATCH v2 3/8] Cygwin: Move post-dir unlink check Ben Wijen
2021-01-22 12:35 ` Corinna Vinschen
2021-01-20 16:10 ` [PATCH v2 4/8] syscalls.cc: Implement non-path_conv dependent _unlink_nt Ben Wijen
2021-01-26 11:34 ` Corinna Vinschen
2021-02-03 11:03 ` Ben
2021-02-04 19:29 ` Corinna Vinschen
2021-01-20 16:10 ` [PATCH v2 5/8] path.cc: Allow to skip filesystem checks Ben Wijen
2021-01-20 16:10 ` [PATCH v2 6/8] syscalls.cc: Expose shallow-pathconv unlink_nt Ben Wijen
2021-01-26 11:45 ` Corinna Vinschen
2021-01-20 16:10 ` [PATCH v2 7/8] dir.cc: Try unlink_nt first Ben Wijen
2021-01-26 11:46 ` Corinna Vinschen
2021-01-27 9:22 ` Ben
2021-01-20 16:10 ` [PATCH v2 8/8] fhandler_disk_file.cc: Use path_conv's IndexNumber Ben Wijen
2021-01-26 12:15 ` Corinna Vinschen
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