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UPSTREAM: ANDROID: fuse-bpf: Use stored bpf for create_open

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create_open would always take its parent directory's bpf for the created
object. Modify to use the bpf stored in fuse_dentry which is set by
lookup.

Bug: 291705489
Test: fuse_test passes, adb push file /sdcard/Android/data works
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Change-Id: I0a1ea2a291a8fdf67923f1827176b2ea96bd4c2d
This commit is contained in:
Paul Lawrence 2023-07-25 11:20:11 -07:00 • committed by Alexander Martinz
commit 65d60dffad
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GPG key ID: CF15BDD9A321A9B2
1 changed files with 8 additions and 8 deletions
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16
fs/fuse/backing.c
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@ -261,6 +261,7 @@ int fuse_create_open_backing(
struct file *file, unsigned int flags, umode_t mode)
{
struct fuse_inode *dir_fuse_inode = get_fuse_inode(dir);
struct fuse_dentry *fuse_entry = get_fuse_dentry(entry);
struct fuse_dentry *dir_fuse_dentry = get_fuse_dentry(entry->d_parent);
struct dentry *backing_dentry = NULL;
struct inode *inode = NULL;
@ -292,19 +293,19 @@ int fuse_create_open_backing(
if (err)
goto out;
if (get_fuse_dentry(entry)->backing_path.dentry)
path_put(&get_fuse_dentry(entry)->backing_path);
get_fuse_dentry(entry)->backing_path = (struct path) {
if (fuse_entry->backing_path.dentry)
path_put(&fuse_entry->backing_path);
fuse_entry->backing_path = (struct path) {
.mnt = dir_fuse_dentry->backing_path.mnt,
.dentry = backing_dentry,
};
path_get(&get_fuse_dentry(entry)->backing_path);
path_get(&fuse_entry->backing_path);
if (d_inode)
target_nodeid = get_fuse_inode(d_inode)->nodeid;
inode = fuse_iget_backing(dir->i_sb, target_nodeid,
get_fuse_dentry(entry)->backing_path.dentry->d_inode);
fuse_entry->backing_path.dentry->d_inode);
if (!inode) {
err = -EIO;
goto out;
@ -312,9 +313,8 @@ int fuse_create_open_backing(
if (get_fuse_inode(inode)->bpf)
bpf_prog_put(get_fuse_inode(inode)->bpf);
get_fuse_inode(inode)->bpf = dir_fuse_inode->bpf;
if (get_fuse_inode(inode)->bpf)
bpf_prog_inc(dir_fuse_inode->bpf);
get_fuse_inode(inode)->bpf = fuse_entry->bpf;
fuse_entry->bpf = NULL;
newent = d_splice_alias(inode, entry);
if (IS_ERR(newent)) {