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fs: simplify error handling

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Rely on cleanup helper and simplify error handling

Link: https://lore.kernel.org/r/20240607-vfs-listmount-reverse-v1-3-7877a2bfa5e5@kernel.org
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2024-06-07 16:55:36 +02:00
parent cb54ef4f05
commit 17e7016128
1 changed files with 6 additions and 12 deletions
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fs/namespace.c
+6 -12
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@@ -5050,7 +5050,7 @@ static struct mount *listmnt_next(struct mount *curr)
static ssize_t do_listmount(u64 mnt_parent_id, u64 last_mnt_id, u64 *mnt_ids,
size_t nr_mnt_ids)
{
struct path root;
struct path root __free(path_put) = {};
struct mnt_namespace *ns = current->nsproxy->mnt_ns;
struct path orig;
struct mount *r, *first;
@@ -5063,10 +5063,8 @@ static ssize_t do_listmount(u64 mnt_parent_id, u64 last_mnt_id, u64 *mnt_ids,
orig = root;
} else {
orig.mnt = lookup_mnt_in_ns(mnt_parent_id, ns);
if (!orig.mnt) {
ret = -ENOENT;
goto err;
}
if (!orig.mnt)
return -ENOENT;
orig.dentry = orig.mnt->mnt_root;
}
@@ -5075,14 +5073,12 @@ static ssize_t do_listmount(u64 mnt_parent_id, u64 last_mnt_id, u64 *mnt_ids,
* mounts to show users.
*/
if (!is_path_reachable(real_mount(orig.mnt), orig.dentry, &root) &&
!ns_capable_noaudit(&init_user_ns, CAP_SYS_ADMIN)) {
ret = -EPERM;
goto err;
}
!ns_capable_noaudit(&init_user_ns, CAP_SYS_ADMIN))
return -EPERM;
ret = security_sb_statfs(orig.dentry);
if (ret)
goto err;
return ret;
if (!last_mnt_id)
first = node_to_mount(rb_first(&ns->mounts));
@@ -5099,8 +5095,6 @@ static ssize_t do_listmount(u64 mnt_parent_id, u64 last_mnt_id, u64 *mnt_ids,
nr_mnt_ids--;
ret++;
}
err:
path_put(&root);
return ret;
}