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bpf: convert bpf_iter_new_fd() to FD_PREPARE()

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Link: https://patch.msgid.link/20251123-work-fd-prepare-v4-23-b6efa1706cfd@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2025-11-23 17:33:41 +01:00
parent f2573685bd
commit 798c2da490
1 changed files with 7 additions and 20 deletions
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27
kernel/bpf/bpf_iter.c
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@@ -634,37 +634,24 @@ static int prepare_seq_file(struct file *file, struct bpf_iter_link *link)
int bpf_iter_new_fd(struct bpf_link *link)
{
struct bpf_iter_link *iter_link;
struct file *file;
unsigned int flags;
int err, fd;
int err;
if (link->ops != &bpf_iter_link_lops)
return -EINVAL;
flags = O_RDONLY | O_CLOEXEC;
fd = get_unused_fd_flags(flags);
if (fd < 0)
return fd;
file = anon_inode_getfile("bpf_iter", &bpf_iter_fops, NULL, flags);
if (IS_ERR(file)) {
err = PTR_ERR(file);
goto free_fd;
}
FD_PREPARE(fdf, flags, anon_inode_getfile("bpf_iter", &bpf_iter_fops, NULL, flags));
if (fdf.err)
return fdf.err;
iter_link = container_of(link, struct bpf_iter_link, link);
err = prepare_seq_file(file, iter_link);
err = prepare_seq_file(fd_prepare_file(fdf), iter_link);
if (err)
goto free_file;
return err; /* Automatic cleanup handles fput */
fd_install(fd, file);
return fd;
free_file:
fput(file);
free_fd:
put_unused_fd(fd);
return err;
return fd_publish(fdf);
}
struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop)