bpftool: Mount bpffs on provided dir instead of parent dir #6614
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When pinning programs/objects under PATH (eg: during "bpftool prog loadall") the bpffs is mounted on the parent dir of PATH in the following situations: - the given dir exists but it is not bpffs. - the given dir doesn't exist and the parent dir is not bpffs. Mounting on the parent dir can also have the unintentional side- effect of hiding other files located under the parent dir. If the given dir exists but is not bpffs, then the bpffs should be mounted on the given dir and not its parent dir. Similarly, if the given dir doesn't exist and its parent dir is not bpffs, then the given dir should be created and the bpffs should be mounted on this new dir. Link: https://lore.kernel.org/bpf/2da44d24-74ae-a564-1764-afccf395eeec@isovalent.com/T/#t Closes: libbpf/bpftool#100 Fixes: 2a36c26 ("bpftool: Support bpffs mountpoint as pin path for prog loadall") Changes since v1: - Split "mount_bpffs_for_pin" into two functions. This is done to improve maintainability and readability. Changes since v2: - mount_bpffs_for_pin: rename to "create_and_mount_bpffs_dir". - mount_bpffs_given_file: rename to "mount_bpffs_given_file". - create_and_mount_bpffs_dir: - introduce "dir_exists" boolean. - remove new dir if "mnt_fs" fails. - improve error handling and error messages. Signed-off-by: Sahil Siddiq <icegambit91@gmail.com>
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=837147 expired. Closing PR. |
Pull request for series with
subject: bpftool: Mount bpffs on provided dir instead of parent dir
version: 3
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=837147