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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Fri, 29 Jul 2022 15:56:00 -0400
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Subject: [PATCH] Make debug=file show which file filters get run.
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If one of the file filters breaks things, it's hard to figure out where
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it has happened.
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This makes grub log which filter is being run, which makes it easier to
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figure out where you are in the sequence of events.
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Signed-off-by: Peter Jones <pjones@redhat.com>
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(cherry picked from commit d3d6518a13b5440a3be6c66b0ae47447182f2891)
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---
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grub-core/kern/file.c | 11 +++++++++++
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1 file changed, 11 insertions(+)
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diff --git a/grub-core/kern/file.c b/grub-core/kern/file.c
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index ed69fc0f0f..3f175630ea 100644
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--- a/grub-core/kern/file.c
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+++ b/grub-core/kern/file.c
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@@ -30,6 +30,14 @@ void (*EXPORT_VAR (grub_grubnet_fini)) (void);
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grub_file_filter_t grub_file_filters[GRUB_FILE_FILTER_MAX];
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+static char *filter_names[] = {
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+ [GRUB_FILE_FILTER_VERIFY] = "GRUB_FILE_FILTER_VERIFY",
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+ [GRUB_FILE_FILTER_GZIO] = "GRUB_FILE_FILTER_GZIO",
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+ [GRUB_FILE_FILTER_XZIO] = "GRUB_FILE_FILTER_XZIO",
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+ [GRUB_FILE_FILTER_LZOPIO] = "GRUB_FILE_FILTER_LZOPIO",
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+ [GRUB_FILE_FILTER_MAX] = "GRUB_FILE_FILTER_MAX"
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+};
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+
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/* Get the device part of the filename NAME. It is enclosed by parentheses. */
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char *
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grub_file_get_device_name (const char *name)
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@@ -121,6 +129,9 @@ grub_file_open (const char *name, enum grub_file_type type)
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if (grub_file_filters[filter])
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{
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last_file = file;
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+ if (filter < GRUB_FILE_FILTER_MAX)
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+ grub_dprintf ("file", "Running %s file filter\n",
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+ filter_names[filter]);
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file = grub_file_filters[filter] (file, type);
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if (file && file != last_file)
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{
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