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ANDROID: fuse: Add flag for Android passthrough support

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Android does not work with unmodified Android passthrough.
This feature flag marks that those modifications are in place, and that
passthrough will function as Android expects.

Bug: 376007121
Test: cat /sys/fs/fuse/fuse_passthrough
Change-Id: I2cd2a6f646e2b6172b5ecc5cc699318395082f63
Signed-off-by: Daniel Rosenberg <drosen@google.com>
This commit is contained in:
Daniel Rosenberg
2025-02-10 16:01:25 -08:00
committed by Treehugger Robot
parent 7b7404ab99
commit 62ae9b0430
2 changed files with 26 additions and 4 deletions
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Documentation/ABI/testing/sysfs-fs-fuse
+8
View File
@@ -5,6 +5,14 @@ Description:
Read-only file that contains the word 'supported' if fuse-bpf is
supported, does not exist otherwise
What: /sys/fs/fuse/features/fuse_passthrough
Date: February 2025
Contact: Daniel Rosenberg <drosen@google.com>
Description:
Read-only file that contains the word 'supported' if fuse
passthrough with Android modifications is supported, does not
exist otherwise
What: /sys/fs/fuse/bpf_prog_type_fuse
Date: December 2022
Contact: Paul Lawrence <paullawrence@google.com>
fs/fuse/inode.c
+18 -4
View File
@@ -2242,6 +2242,17 @@ static void fuse_fs_cleanup(void)
static struct kobject *fuse_kobj;
#ifdef CONFIG_FUSE_PASSTHROUGH
static ssize_t fuse_passthrough_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buff)
{
return sysfs_emit(buff, "supported\n");
}
static struct kobj_attribute fuse_passthrough_attr =
__ATTR_RO(fuse_passthrough);
#endif
static ssize_t fuse_bpf_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buff)
{
@@ -2251,14 +2262,17 @@ static ssize_t fuse_bpf_show(struct kobject *kobj,
static struct kobj_attribute fuse_bpf_attr =
__ATTR_RO(fuse_bpf);
static struct attribute *bpf_features[] = {
static struct attribute *fuse_features[] = {
&fuse_bpf_attr.attr,
#ifdef CONFIG_FUSE_PASSTHROUGH
&fuse_passthrough_attr.attr,
#endif
NULL,
};
static const struct attribute_group bpf_features_group = {
static const struct attribute_group fuse_features_group = {
.name = "features",
.attrs = bpf_features,
.attrs = fuse_features,
};
/*
@@ -2286,7 +2300,7 @@ static const struct attribute_group bpf_attr_group = {
};
static const struct attribute_group *attribute_groups[] = {
&bpf_features_group,
&fuse_features_group,
&bpf_attr_group,
NULL
};