android_system_sepolicy/public/e2fs.te
Kelvin Zhang 2b413622ce Give vold permission to wipe a block device
During mountFstab call, vold might need to wipe and re-format a device.
See code in system/vold/model/PublicVolume.cpp , PublicVolume::doFormat
Allow IOCTLs such as BLKDISCARDZEROES for wiping.

Test: th
Bug: 279808236
Change-Id: I0bebf850aa45ece6227fa5c3e9c3fdb38164f79e
2023-08-02 14:27:08 -07:00

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type e2fs, domain, coredomain;
type e2fs_exec, system_file_type, exec_type, file_type;
allow e2fs devpts:chr_file { read write getattr ioctl };
allow e2fs dev_type:blk_file getattr;
allow e2fs block_device:dir search;
allow e2fs userdata_block_device:blk_file rw_file_perms;
allow e2fs metadata_block_device:blk_file rw_file_perms;
allow e2fs dm_device:blk_file rw_file_perms;
allow e2fs zoned_block_device:blk_file rw_file_perms;
# Vold needs to capture mkfs.ext4's output
allow e2fs vold:fd use;
# Need to be able to format a partition
allow e2fs sysfs_dm:dir r_dir_perms;
allow e2fs sysfs_dm:file r_file_perms;
allowxperm e2fs { userdata_block_device metadata_block_device dm_device zoned_block_device }:blk_file ioctl {
BLKSECDISCARD BLKDISCARD BLKPBSZGET BLKDISCARDZEROES BLKROGET BLKREPORTZONE BLKRESETZONE
};
allow e2fs {
proc_filesystems
proc_mounts
proc_swaps
}:file r_file_perms;
# access /sys/fs/ext4/features
allow e2fs sysfs_fs_ext4_features:dir search;
allow e2fs sysfs_fs_ext4_features:file r_file_perms;
# access SELinux context files
allow e2fs file_contexts_file:file r_file_perms;