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Message-Id: <20200401203239.163679-4-ebiggers@kernel.org> Date: Wed, 1 Apr 2020 13:32:38 -0700 From: Eric Biggers <ebiggers@...nel.org> To: linux-ext4@...r.kernel.org Cc: linux-fscrypt@...r.kernel.org Subject: [PATCH 3/4] ext4.5: document the stable_inodes feature From: Eric Biggers <ebiggers@...gle.com> Signed-off-by: Eric Biggers <ebiggers@...gle.com> --- misc/ext4.5.in | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/misc/ext4.5.in b/misc/ext4.5.in index 1db61a5f..90bc4f88 100644 --- a/misc/ext4.5.in +++ b/misc/ext4.5.in @@ -299,6 +299,20 @@ feature is essentially a more extreme version of sparse_super and is designed to allow a much larger percentage of the disk to have contiguous blocks available for data files. .TP +.B stable_inodes +.br +Marks the filesystem's inode numbers and UUID as stable. +.BR resize2fs (8) +will not allow shrinking a filesystem with this feature, nor +will +.BR tune2fs (8) +allow changing its UUID. This feature allows the use of specialized encryption +settings that make use of the inode numbers and UUID. Note that the +.B encrypt +feature still needs to be enabled separately. +.B stable_inodes +is a "compat" feature, so old kernels will allow it. +.TP .B uninit_bg .br This ext4 file system feature indicates that the block group descriptors @@ -788,6 +802,8 @@ ext4, 4.13 ext4, 5.2 .IP "\fBverity\fR" 2i ext4, 5.4 +.IP "\fBstable_inodes\fR" 2i +ext4, 5.5 .SH SEE ALSO .BR mke2fs (8), .BR mke2fs.conf (5), -- 2.26.0.rc2.310.g2932bb562d-goog
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