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UPSTREAM: ANDROID: fuse-bpf: Support inotify

Browse source 
Test: fuse_test, atest CtsOsTestCases:android.os.cts.FileObserverTest
Bug: 202785178
Signed-off-by: Daniel Rosenberg <drosen@google.com>
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Signed-off-by: Alessio Balsini <balsini@google.com>
Change-Id: I88719a8ab23c2042fb8f50462f023e247aa4b6c3
This commit is contained in:
Paul Lawrence 2022-01-12 19:29:56 +00:00 • committed by Alexander Martinz
commit 73ed3d189e
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GPG key ID: CF15BDD9A321A9B2
3 changed files with 46 additions and 0 deletions
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23
fs/fuse/backing.c
View file

@ -1026,6 +1026,29 @@ void *fuse_revalidate_finalize(struct fuse_args *fa, struct inode *dir,
return 0;
}
int fuse_canonical_path_initialize(struct fuse_args *fa,
struct fuse_dummy_io *fdi,
const struct path *path,
struct path *canonical_path)
{
fa->opcode = FUSE_CANONICAL_PATH;
return 0;
}
int fuse_canonical_path_backing(struct fuse_args *fa, const struct path *path,
struct path *canonical_path)
{
get_fuse_backing_path(path->dentry, canonical_path);
return 0;
}
void *fuse_canonical_path_finalize(struct fuse_args *fa,
const struct path *path,
struct path *canonical_path)
{
return NULL;
}
int fuse_mknod_initialize(
struct fuse_args *fa, struct fuse_mknod_in *fmi,
struct inode *dir, struct dentry *entry, umode_t mode, dev_t rdev)

13
fs/fuse/dir.c
View file

@ -331,6 +331,19 @@ static void fuse_dentry_canonical_path(const struct path *path, struct path *can
char *path_name;
int err;
#ifdef CONFIG_FUSE_BPF
struct fuse_err_ret fer;
fer = fuse_bpf_backing(inode, struct fuse_dummy_io,
fuse_canonical_path_initialize,
fuse_canonical_path_backing,
fuse_canonical_path_finalize, path,
canonical_path);
if (fer.ret)
return;
#endif
path_name = (char *)get_zeroed_page(GFP_KERNEL);
if (!path_name)
goto default_path;

10
fs/fuse/fuse_i.h
View file

@ -1521,6 +1521,16 @@ int fuse_revalidate_backing(struct fuse_args *fa, struct inode *dir,
void *fuse_revalidate_finalize(struct fuse_args *fa, struct inode *dir,
struct dentry *entry, unsigned int flags);
int fuse_canonical_path_initialize(struct fuse_args *fa,
struct fuse_dummy_io *fdi,
const struct path *path,
struct path *canonical_path);
int fuse_canonical_path_backing(struct fuse_args *fa, const struct path *path,
struct path *canonical_path);
void *fuse_canonical_path_finalize(struct fuse_args *fa,
const struct path *path,
struct path *canonical_path);
struct fuse_getattr_io {
struct fuse_getattr_in fgi;
struct fuse_attr_out fao;