From: Patrick Steinhardt <ps@pks.im>
To: Jeff Hostetler via GitGitGadget <gitgitgadget@gmail.com>
Cc: git@vger.kernel.org, Jeff Hostetler <jeffhostetler@github.com>
Subject: Re: [PATCH 06/12] fsmonitor: clarify handling of directory events in callback
Date: Thu, 15 Feb 2024 10:32:25 +0100 [thread overview]
Message-ID: <Zc3aKSR53Ew4ImMP@tanuki> (raw)
In-Reply-To: <5b6f8bd1fe7b6c742b25a5a1ed95b528f352215e.1707857541.git.gitgitgadget@gmail.com>
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On Tue, Feb 13, 2024 at 08:52:15PM +0000, Jeff Hostetler via GitGitGadget wrote:
> From: Jeff Hostetler <jeffhostetler@github.com>
>
> Signed-off-by: Jeff Hostetler <jeffhostetler@github.com>
> ---
> fsmonitor.c | 47 +++++++++++++++++++++++++++++++++--------------
> 1 file changed, 33 insertions(+), 14 deletions(-)
>
> diff --git a/fsmonitor.c b/fsmonitor.c
> index 614270fa5e8..754fe20cfd0 100644
> --- a/fsmonitor.c
> +++ b/fsmonitor.c
> @@ -219,24 +219,40 @@ static void fsmonitor_refresh_callback_unqualified(
> }
> }
>
> -static void fsmonitor_refresh_callback_slash(
> +/*
> + * The daemon can decorate directory events, such as a move or rename,
> + * by adding a trailing slash to the observed name. Use this to
> + * explicitly invalidate the entire cone under that directory.
> + *
> + * The daemon can only reliably do that if the OS FSEvent contains
> + * sufficient information in the event.
> + *
> + * macOS FSEvents have enough information.
> + *
> + * Other platforms may or may not be able to do it (and it might
> + * depend on the type of event (for example, a daemon could lstat() an
> + * observed pathname after a rename, but not after a delete)).
> + *
> + * If we find an exact match in the index for a path with a trailing
> + * slash, it means that we matched a sparse-index directory in a
> + * cone-mode sparse-checkout (since that's the only time we have
> + * directories in the index). We should never see this in practice
> + * (because sparse directories should not be present and therefore
> + * not generating FS events). Either way, we can treat them in the
> + * same way and just invalidate the cache-entry and the untracked
> + * cache (and in this case, the forward cache-entry scan won't find
> + * anything and it doesn't hurt to let it run).
> + *
> + * Return the number of cache-entries that we invalidated. We will
> + * use this later to determine if we need to attempt a second
> + * case-insensitive search.
> + */
> +static int fsmonitor_refresh_callback_slash(
> struct index_state *istate, const char *name, int len, int pos)
> {
> int i;
> + int nr_in_cone = 0;
Should we return `size_t` instead of `int`?
Patrick
> - /*
> - * The daemon can decorate directory events, such as
> - * moves or renames, with a trailing slash if the OS
> - * FS Event contains sufficient information, such as
> - * MacOS.
> - *
> - * Use this to invalidate the entire cone under that
> - * directory.
> - *
> - * We do not expect an exact match because the index
> - * does not normally contain directory entries, so we
> - * start at the insertion point and scan.
> - */
> if (pos < 0)
> pos = -pos - 1;
>
> @@ -245,7 +261,10 @@ static void fsmonitor_refresh_callback_slash(
> if (!starts_with(istate->cache[i]->name, name))
> break;
> istate->cache[i]->ce_flags &= ~CE_FSMONITOR_VALID;
> + nr_in_cone++;
> }
> +
> + return nr_in_cone;
> }
>
> static void fsmonitor_refresh_callback(struct index_state *istate, char *name)
> --
> gitgitgadget
>
>
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next prev parent reply other threads:[~2024-02-15 9:33 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-13 20:52 [PATCH 00/12] FSMonitor edge cases on case-insensitive file systems Jeff Hostetler via GitGitGadget
2024-02-13 20:52 ` [PATCH 01/12] sparse-index: pass string length to index_file_exists() Jeff Hostetler via GitGitGadget
2024-02-13 22:07 ` Junio C Hamano
2024-02-20 17:34 ` Jeff Hostetler
2024-02-13 20:52 ` [PATCH 02/12] name-hash: add index_dir_exists2() Jeff Hostetler via GitGitGadget
2024-02-13 21:43 ` Junio C Hamano
2024-02-20 17:38 ` Jeff Hostetler
2024-02-20 19:34 ` Junio C Hamano
2024-02-15 9:31 ` Patrick Steinhardt
2024-02-13 20:52 ` [PATCH 03/12] t7527: add case-insensitve test for FSMonitor Jeff Hostetler via GitGitGadget
2024-02-13 20:52 ` [PATCH 04/12] fsmonitor: refactor refresh callback on directory events Jeff Hostetler via GitGitGadget
2024-02-15 9:32 ` Patrick Steinhardt
2024-02-20 18:54 ` Jeff Hostetler
2024-02-21 12:54 ` Patrick Steinhardt
2024-02-13 20:52 ` [PATCH 05/12] fsmonitor: refactor refresh callback for non-directory events Jeff Hostetler via GitGitGadget
2024-02-14 1:34 ` Junio C Hamano
2024-02-15 9:32 ` Patrick Steinhardt
2024-02-13 20:52 ` [PATCH 06/12] fsmonitor: clarify handling of directory events in callback Jeff Hostetler via GitGitGadget
2024-02-14 7:47 ` Junio C Hamano
2024-02-20 18:56 ` Jeff Hostetler
2024-02-20 19:24 ` Junio C Hamano
2024-02-15 9:32 ` Patrick Steinhardt [this message]
2024-02-20 19:10 ` Jeff Hostetler
2024-02-13 20:52 ` [PATCH 07/12] fsmonitor: refactor untracked-cache invalidation Jeff Hostetler via GitGitGadget
2024-02-14 16:46 ` Junio C Hamano
2024-02-15 9:32 ` Patrick Steinhardt
2024-02-13 20:52 ` [PATCH 08/12] fsmonitor: support case-insensitive directory events Jeff Hostetler via GitGitGadget
2024-02-15 9:32 ` Patrick Steinhardt
2024-02-13 20:52 ` [PATCH 09/12] fsmonitor: refactor non-directory callback Jeff Hostetler via GitGitGadget
2024-02-15 9:32 ` Patrick Steinhardt
2024-02-13 20:52 ` [PATCH 10/12] fsmonitor: support case-insensitive non-directory events Jeff Hostetler via GitGitGadget
2024-02-13 20:52 ` [PATCH 11/12] fsmonitor: refactor bit invalidation in refresh callback Jeff Hostetler via GitGitGadget
2024-02-15 9:32 ` Patrick Steinhardt
2024-02-13 20:52 ` [PATCH 12/12] t7527: update case-insenstive fsmonitor test Jeff Hostetler via GitGitGadget
2024-02-23 3:18 ` [PATCH v2 00/16] FSMonitor edge cases on case-insensitive file systems Jeff Hostetler via GitGitGadget
2024-02-23 3:18 ` [PATCH v2 01/16] name-hash: add index_dir_find() Jeff Hostetler via GitGitGadget
2024-02-23 6:37 ` Junio C Hamano
2024-02-23 3:18 ` [PATCH v2 02/16] t7527: add case-insensitve test for FSMonitor Jeff Hostetler via GitGitGadget
2024-02-23 3:18 ` [PATCH v2 03/16] t7527: temporarily disable case-insensitive tests Jeff Hostetler via GitGitGadget
2024-02-23 8:17 ` Junio C Hamano
2024-02-26 17:12 ` Jeff Hostetler
2024-02-23 3:18 ` [PATCH v2 04/16] fsmonitor: refactor refresh callback on directory events Jeff Hostetler via GitGitGadget
2024-02-23 8:18 ` Junio C Hamano
2024-02-23 3:18 ` [PATCH v2 05/16] fsmonitor: clarify handling of directory events in callback helper Jeff Hostetler via GitGitGadget
2024-02-23 3:18 ` [PATCH v2 06/16] fsmonitor: refactor refresh callback for non-directory events Jeff Hostetler via GitGitGadget
2024-02-23 8:18 ` Junio C Hamano
2024-02-25 12:30 ` Torsten Bögershausen
2024-02-25 17:24 ` Junio C Hamano
2024-02-23 3:18 ` [PATCH v2 07/16] dir: create untracked_cache_invalidate_trimmed_path() Jeff Hostetler via GitGitGadget
2024-02-25 12:35 ` Torsten Bögershausen
2024-02-23 3:18 ` [PATCH v2 08/16] fsmonitor: refactor untracked-cache invalidation Jeff Hostetler via GitGitGadget
2024-02-23 3:18 ` [PATCH v2 09/16] fsmonitor: move untracked invalidation into helper functions Jeff Hostetler via GitGitGadget
2024-02-23 17:36 ` Junio C Hamano
2024-02-26 18:45 ` Jeff Hostetler
2024-02-23 3:18 ` [PATCH v2 10/16] fsmonitor: return invalidated cache-entry count on directory event Jeff Hostetler via GitGitGadget
2024-02-23 3:18 ` [PATCH v2 11/16] fsmonitor: remove custom loop from non-directory path handler Jeff Hostetler via GitGitGadget
2024-02-23 17:47 ` Junio C Hamano
2024-02-23 3:18 ` [PATCH v2 12/16] fsmonitor: return invalided cache-entry count on non-directory event Jeff Hostetler via GitGitGadget
2024-02-23 17:51 ` Junio C Hamano
2024-02-23 3:18 ` [PATCH v2 13/16] fsmonitor: trace the new invalidated cache-entry count Jeff Hostetler via GitGitGadget
2024-02-23 17:53 ` Junio C Hamano
2024-02-23 3:18 ` [PATCH v2 14/16] fsmonitor: support case-insensitive events Jeff Hostetler via GitGitGadget
2024-02-23 18:14 ` Junio C Hamano
2024-02-26 20:41 ` Jeff Hostetler
2024-02-26 21:18 ` Junio C Hamano
2024-02-25 13:10 ` Torsten Bögershausen
2024-02-26 20:47 ` Jeff Hostetler
2024-02-23 3:18 ` [PATCH v2 15/16] fsmonitor: refactor bit invalidation in refresh callback Jeff Hostetler via GitGitGadget
2024-02-23 18:18 ` Junio C Hamano
2024-02-23 3:18 ` [PATCH v2 16/16] t7527: update case-insenstive fsmonitor test Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 00/14] FSMonitor edge cases on case-insensitive file systems Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 01/14] name-hash: add index_dir_find() Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 02/14] t7527: add case-insensitve test for FSMonitor Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 03/14] fsmonitor: refactor refresh callback on directory events Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 04/14] fsmonitor: clarify handling of directory events in callback helper Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 05/14] fsmonitor: refactor refresh callback for non-directory events Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 06/14] dir: create untracked_cache_invalidate_trimmed_path() Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 07/14] fsmonitor: refactor untracked-cache invalidation Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 08/14] fsmonitor: move untracked-cache invalidation into helper functions Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 09/14] fsmonitor: return invalidated cache-entry count on directory event Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 10/14] fsmonitor: remove custom loop from non-directory path handler Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 11/14] fsmonitor: return invalided cache-entry count on non-directory event Jeff Hostetler via GitGitGadget
2024-03-06 12:58 ` Patrick Steinhardt
2024-02-26 21:39 ` [PATCH v3 12/14] fsmonitor: trace the new invalidated cache-entry count Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 13/14] fsmonitor: refactor bit invalidation in refresh callback Jeff Hostetler via GitGitGadget
2024-02-26 21:39 ` [PATCH v3 14/14] fsmonitor: support case-insensitive events Jeff Hostetler via GitGitGadget
2024-03-06 12:58 ` Patrick Steinhardt
2024-02-27 1:40 ` [PATCH v3 00/14] FSMonitor edge cases on case-insensitive file systems Junio C Hamano
2024-03-06 12:58 ` Patrick Steinhardt
2024-03-06 17:09 ` Junio C Hamano
2024-03-06 18:10 ` Jeff Hostetler
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