Refactor mount operations to use procfd and new mount API#2094

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giuseppe:procfd-refactor

Commits on May 19, 2026

linux: fix NULL pointer dereference

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linux: open procfd early and store in private_data

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linux: use fsetxattr with procfd in do_mount

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linux: use fchmodat/fchownat with procfd in libcrun_create_dev

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linux: use procfd to read /proc/self/cgroup in do_mount_cgroup_v1

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linux: use procfd to stat source_mountfd in process_single_mount

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linux: use procfd in do_masked_or_readonly_path

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linux: use procfd in do_masked_or_readonly_path keep_flags fallback

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linux: use procfd in get_shared_empty_dir_cached and mount_masked_dir

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linux: use procfd to read unified cgroup path

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linux: try mount_setattr in do_remount

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linux: try mount_setattr in make_parent_mount_private

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linux: use fstat to detect root in make_parent_mount_private

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linux: fix swapped args in do_mount_setattr for readonly paths

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linux: use new mount API in do_mount when available

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linux: pre-open needed devices in parent for userns containers

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linux: use fchmodat/fchownat in libcrun_create_dev

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linux: change signature for open_mount_of_type
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linux: move pivot_root before container mounts

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tests: check directory type instead of nlink for masked paths

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linux: read copy-symlink targets before pivot_root

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linux: defer mount namespace creation to pivot_root

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linux: add OPEN_TREE_NAMESPACE support

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Revert "linux: add OPEN_TREE_NAMESPACE support"
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Refactor mount operations to use procfd and new mount API#2094

Refactor mount operations to use procfd and new mount API#2094
giuseppe wants to merge 24 commits into
containers:mainfrom
giuseppe:procfd-refactor

Commits on May 19, 2026

linux: fix NULL pointer dereference

linux: open procfd early and store in private_data

linux: use fsetxattr with procfd in do_mount

linux: use fchmodat/fchownat with procfd in libcrun_create_dev

linux: use procfd to read /proc/self/cgroup in do_mount_cgroup_v1

linux: use procfd to stat source_mountfd in process_single_mount

linux: use procfd in do_masked_or_readonly_path

linux: use procfd in do_masked_or_readonly_path keep_flags fallback

linux: use procfd in get_shared_empty_dir_cached and mount_masked_dir

linux: use procfd to read unified cgroup path

linux: try mount_setattr in do_remount

linux: try mount_setattr in make_parent_mount_private

linux: use fstat to detect root in make_parent_mount_private

linux: fix swapped args in do_mount_setattr for readonly paths

linux: use new mount API in do_mount when available

linux: pre-open needed devices in parent for userns containers

linux: use fchmodat/fchownat in libcrun_create_dev

linux: change signature for open_mount_of_type

linux: move pivot_root before container mounts

tests: check directory type instead of nlink for masked paths

linux: read copy-symlink targets before pivot_root

linux: defer mount namespace creation to pivot_root

linux: add OPEN_TREE_NAMESPACE support

Revert "linux: add OPEN_TREE_NAMESPACE support"