Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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651 B
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22 lines
651 B
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.. SPDX-License-Identifier: GPL-2.0
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.. _fs_kfuncs-header-label:
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=====================
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BPF filesystem kfuncs
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=====================
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BPF LSM programs need to access filesystem data from LSM hooks. The following
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BPF kfuncs can be used to get these data.
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* ``bpf_get_file_xattr()``
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* ``bpf_get_fsverity_digest()``
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To avoid recursions, these kfuncs follow the following rules:
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1. These kfuncs are only permitted from BPF LSM function.
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2. These kfuncs should not call into other LSM hooks, i.e. security_*(). For
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example, ``bpf_get_file_xattr()`` does not use ``vfs_getxattr()``, because
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the latter calls LSM hook ``security_inode_getxattr``.
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