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UPSTREAM: ANDROID: fuse-bpf: Get correct inode in mkdir

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We were getting the inode with the parent inode info
Also change variable names to remove confusion
Also set bpf correctly in new inode

Bug: 293838958
Test: fuse_test, atest ScopedStorageDeviceTest,
	atest CtsScopedStorageHostTest
Signed-off-by: Paul Lawrence <paullawrence@google.com>
(cherry picked from https://android-review.googlesource.com/q/commit:12eb00420cad77d7b7fcfbd1088c921ae629e69d)
Merged-In: I0b6a6951599e0d211afd2243daacb98679503448
Change-Id: I0b6a6951599e0d211afd2243daacb98679503448
This commit is contained in:
Paul Lawrence 2023-08-29 11:17:44 -07:00 • committed by Alexander Martinz
commit 7b999dfdbb
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GPG key ID: CF15BDD9A321A9B2
1 changed files with 17 additions and 11 deletions
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28
fs/fuse/backing.c
View file

@ -1495,32 +1495,33 @@ int fuse_mkdir_initialize(
int fuse_mkdir_backing(
struct fuse_bpf_args *fa,
struct inode *dir, struct dentry *entry, umode_t mode)
struct inode *dir_inode, struct dentry *entry, umode_t mode)
{
int err = 0;
const struct fuse_mkdir_in *fmi = fa->in_args[0].value;
struct fuse_inode *fuse_inode = get_fuse_inode(dir);
struct inode *backing_inode = fuse_inode->backing_inode;
struct fuse_inode *dir_fuse_inode = get_fuse_inode(dir_inode);
struct inode *dir_backing_inode = dir_fuse_inode->backing_inode;
struct path backing_path = {};
struct inode *inode = NULL;
struct dentry *d;
//TODO Actually deal with changing the backing entry in mkdir
get_fuse_backing_path(entry, &backing_path);
if (!backing_path.dentry)
return -EBADF;
inode_lock_nested(backing_inode, I_MUTEX_PARENT);
inode_lock_nested(dir_backing_inode, I_MUTEX_PARENT);
mode = fmi->mode;
if (!IS_POSIXACL(backing_inode))
if (!IS_POSIXACL(dir_backing_inode))
mode &= ~fmi->umask;
err = vfs_mkdir(backing_inode, backing_path.dentry, mode);
err = vfs_mkdir(dir_backing_inode, backing_path.dentry, mode);
if (err)
goto out;
if (d_really_is_negative(backing_path.dentry) ||
unlikely(d_unhashed(backing_path.dentry))) {
d = lookup_one_len(entry->d_name.name, backing_path.dentry->d_parent,
entry->d_name.len);
struct dentry *d = lookup_one_len(entry->d_name.name,
backing_path.dentry->d_parent,
entry->d_name.len);
if (IS_ERR(d)) {
err = PTR_ERR(d);
goto out;
@ -1528,14 +1529,19 @@ int fuse_mkdir_backing(
dput(backing_path.dentry);
backing_path.dentry = d;
}
inode = fuse_iget_backing(dir->i_sb, fuse_inode->nodeid, backing_inode);
inode = fuse_iget_backing(dir_inode->i_sb, 0,
backing_path.dentry->d_inode);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out;
}
d_instantiate(entry, inode);
if (get_fuse_inode(inode)->bpf)
bpf_prog_put(get_fuse_inode(inode)->bpf);
get_fuse_inode(inode)->bpf = get_fuse_dentry(entry)->bpf;
get_fuse_dentry(entry)->bpf = NULL;
out:
inode_unlock(backing_inode);
inode_unlock(dir_backing_inode);
path_put(&backing_path);
return err;
}