Understanding Android mount output.

# initramfs
rootfs on / type rootfs (ro,seclabel)
# devfs
tmpfs on /dev type tmpfs (rw,seclabel,nosuid,relatime,size=3933144k,nr_inodes=983286,mode=755)
# pts
devpts on /dev/pts type devpts (rw,seclabel,relatime,mode=600)
# cgroups
none on /dev/stune type cgroup (rw,nosuid,nodev,noexec,relatime,schedtune)
none on /dev/cpuctl type cgroup (rw,nosuid,nodev,noexec,relatime,cpu)
none on /dev/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset,noprefix,release_agent=/sbin/cpuset_release_agent)
# cgroup2
cg2_bpf on /dev/cg2_bpf type cgroup2 (rw,nosuid,nodev,noexec,relatime)
# some unknown USB shit
adb on /dev/usb-ffs/adb type functionfs (rw,relatime)
# proc
proc on /proc type proc (rw,relatime,gid=3009,hidepid=2)
# sys
sysfs on /sys type sysfs (rw,seclabel,relatime)
# wtf?
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
# https://en.wikipedia.org/wiki/Debugfs
debugfs on /sys/kernel/debug type debugfs (rw,seclabel,relatime)
# https://www.phoronix.com/scan.php?page=news_item&px=TraceFS-Linux-Tracing-FS
tracefs on /sys/kernel/debug/tracing type tracefs (rw,seclabel,relatime)
# https://lwn.net/Articles/421297/
# https://www.fsl.cs.stonybrook.edu/docs/tracefs-fast04/index.html
pstore on /sys/fs/pstore type pstore (rw,seclabel,nosuid,nodev,noexec,relatime)
# cgroups
none on /sys/fs/cgroup type tmpfs (rw,seclabel,relatime,size=3933144k,nr_inodes=983286,mode=750,gid=1000)
# cgroups
none on /sys/fs/cgroup/freezer type cgroup (rw,relatime,freezer)
# ?
tmpfs on /mnt type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,size=3933144k,nr_inodes=983286,mode=755,gid=1000)
# Vendor partition
/dev/block/bootdevice/by-name/persist on /mnt/vendor/persist type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)

/data/media on /mnt/runtime/default/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=1015,multiuser,mask=6,derive_gid,default_normal,reserved=100MB)
/data/media on /mnt/runtime/read/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=23,derive_gid,default_normal,reserved=100MB)
/data/media on /mnt/runtime/write/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=7,derive_gid,default_normal,reserved=100MB)
/dev/block/platform/soc/1da4000.ufshc/by-name/system on /system type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr)
/dev/block/platform/soc/1da4000.ufshc/by-name/vendor on /vendor type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr)
/dev/block/bootdevice/by-name/modem on /vendor/firmware_mnt type vfat (ro,context=u:object_r:firmware_file:s0,relatime,gid=1000,fmask=0337,dmask=0227,codepage=437,iocharset=iso8859-1,shortname=lower,errors=remount-ro)
/dev/block/bootdevice/by-name/bluetooth on /vendor/bt_firmware type vfat (ro,context=u:object_r:bt_firmware_file:s0,relatime,uid=1002,gid=3002,fmask=0337,dmask=0227,codepage=437,iocharset=iso8859-1,shortname=lower,errors=remount-ro)
/dev/block/bootdevice/by-name/dsp on /vendor/dsp type ext4 (ro,seclabel,nosuid,nodev,relatime,data=ordered)
none on /acct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct)
none on /config type configfs (rw,nosuid,nodev,noexec,relatime)
/dev/block/bootdevice/by-name/userdata on /data type ext4 (rw,seclabel,nosuid,nodev,noatime,discard,noauto_da_alloc,data=ordered)
/dev/block/bootdevice/by-name/cache on /cache type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)
tmpfs on /sbin type tmpfs (rw,seclabel,relatime,size=3933144k,nr_inodes=983286,mode=755)
/sbin/.magisk/block/persist on /sbin/.magisk/mirror/persist type ext4 (rw,seclabel,relatime,data=ordered)
rootfs on /sbin/charger type rootfs (ro,seclabel)
rootfs on /sbin/charger_log type rootfs (ro,seclabel)
/sbin/.magisk/block/system on /sbin/.magisk/mirror/system type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr)
/sbin/.magisk/block/vendor on /sbin/.magisk/mirror/vendor type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr)
/sbin/.magisk/block/data on /sbin/.magisk/mirror/data type ext4 (rw,seclabel,relatime,discard,noauto_da_alloc,data=ordered)
/sbin/.magisk/block/data on /sbin/.magisk/modules type ext4 (rw,seclabel,relatime,discard,noauto_da_alloc,data=ordered)
tmpfs on /storage type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,size=3933144k,nr_inodes=983286,mode=755,gid=1000)
/data/media on /storage/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=7,derive_gid,default_normal,reserved=100MB)
tmpfs on /storage/self type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,size=3933144k,nr_inodes=983286,mode=755,gid=1000)