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ext4: convert extents KUnit test to sget_fc()

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The extents KUnit test uses sget() to get an initialized superblock for
its fake file_system_type. sget() predates fs_context and we want to
retire it. Switch this caller over to sget_fc().

Add a no-op ext_init_fs_context() so fs_context_for_mount() has
something to call on the fake fs_type. ext_set() now takes a struct
fs_context * (still a no-op). extents_kunit_init() allocates the fc,
hands it to sget_fc() and drops the fc reference once the sb is
published. sget_fc() does not retain a pointer to it.

No functional change for the test.

Link: https://patch.msgid.link/20260529-work-sget-v2-1-57bbe08604e4@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2026-05-29 10:43:40 +02:00
parent 254f49634e
commit badb2cc8cf
1 changed files with 18 additions and 4 deletions
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22
fs/ext4/extents-test.c
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@@ -37,6 +37,7 @@
#include <kunit/test.h>
#include <kunit/static_stub.h>
#include <linux/fs_context.h>
#include <linux/gfp_types.h>
#include <linux/stddef.h>
@@ -130,14 +131,20 @@ static void ext_kill_sb(struct super_block *sb)
generic_shutdown_super(sb);
}
static int ext_set(struct super_block *sb, void *data)
static int ext_init_fs_context(struct fs_context *fc)
{
return 0;
}
static int ext_set(struct super_block *sb, struct fs_context *fc)
{
return 0;
}
static struct file_system_type ext_fs_type = {
.name = "extents test",
.kill_sb = ext_kill_sb,
.name = "extents test",
.init_fs_context = ext_init_fs_context,
.kill_sb = ext_kill_sb,
};
static void extents_kunit_exit(struct kunit *test)
@@ -223,6 +230,7 @@ static int extents_kunit_init(struct kunit *test)
struct ext4_inode_info *ei;
struct inode *inode;
struct super_block *sb;
struct fs_context *fc;
struct ext4_sb_info *sbi = NULL;
struct kunit_ext_test_param *param =
(struct kunit_ext_test_param *)(test->param_value);
@@ -232,7 +240,13 @@ static int extents_kunit_init(struct kunit *test)
if (sbi == NULL)
return -ENOMEM;
sb = sget(&ext_fs_type, NULL, ext_set, 0, NULL);
fc = fs_context_for_mount(&ext_fs_type, 0);
if (IS_ERR(fc)) {
kfree(sbi);
return PTR_ERR(fc);
}
sb = sget_fc(fc, NULL, ext_set);
put_fs_context(fc);
if (IS_ERR(sb)) {
kfree(sbi);
return PTR_ERR(sb);