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docs: ioctl-number: document fscrypt ioctl numbers
authorEric Biggers <ebiggers@google.com>
Wed, 9 Oct 2019 23:34:18 +0000 (16:34 -0700)
committerEric Biggers <ebiggers@google.com>
Mon, 21 Oct 2019 20:22:08 +0000 (13:22 -0700)
commit680c60e09007783da527869b226891b2cb3b2584
tree0f38c08fbb7688dfecf9afcab26cb5bfc99d55e6tree | snapshot
parent628ee242f2c0a0d07b14eba99bca49c4ce0b8112commit | diff
docs: ioctl-number: document fscrypt ioctl numbers

The 'f' ioctls with numbers 19-26 decimal are currently used for fscrypt
(a.k.a. ext4/f2fs/ubifs encryption), and up to 39 decimal is reserved
for future fscrypt use, as per the comment in fs/ext4/ext4.h.  So the
reserved range is 13-27 hex.

Document this in ioctl-number.rst.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Documentation/ioctl/ioctl-number.rst diff | blob | history
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