e2fsprogs calls filesystems larger than 3MB but smaller than 512MB "small", which has some implications:
- blocksize 1024 instead of 4096 - inode_ratio 4096 instead of 16384 - inode_size 128 instead of 256 The outcome of the inode size dropping to 128 bytes is that they cannot store 64-bit timestamps, so are not Y2038-safe. A previous attempt to solve this problem[1] changed some of the canned wic files to pass -T default to mkfs.ext4, but this only covered wic images and not traditional images. Also, actually small filesystems, for example a core-image-minimal, will happily be tens of megabytes and with the "default" options will result in an image which runs out of blocks before it runs out of space: mkfs.ext4: Could not allocate block in ext2 filesystem while populating file system Considering that many OpenEmbedded images are in fact "small", being 2038-safe is worth the marginal increase is disk usage. This patch alters the small configuration in native builds so that it also has 256-byte inodes. Target is unchanged so that standard behaviour is maintained outside of the build. This is actually the same underlying patch that Mathieu Dubois-Briand sent in April, but the wic change in [1] was accepted instead. I believe that is the wrong approach and this approach covers more cases. [ YOCTO #14478 ] [1] openembedded-core eecbe62 [2] https://lists.openembedded.org/g/openembedded-core/message/150298 Signed-off-by: Ross Burton <ross.bur...@arm.com> --- .../e2fsprogs/big-inodes-for-small-fs.patch | 22 +++++++++++++++++++ .../e2fsprogs/e2fsprogs_1.46.2.bb | 1 + 2 files changed, 23 insertions(+) create mode 100644 meta/recipes-devtools/e2fsprogs/e2fsprogs/big-inodes-for-small-fs.patch diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs/big-inodes-for-small-fs.patch b/meta/recipes-devtools/e2fsprogs/e2fsprogs/big-inodes-for-small-fs.patch new file mode 100644 index 0000000000..caeb560d32 --- /dev/null +++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs/big-inodes-for-small-fs.patch @@ -0,0 +1,22 @@ +Ensure "small" file systems also have the default inode size (256 bytes) so that +can store 64-bit timestamps and work past 2038. + +The "small" type is any size >3MB and <512MB, which covers a lot of relatively +small filesystems built by OE, especially when they're sized to fit the contents +and expand to the storage on boot. + +Upstream-Status: Inappropriate +Signed-off-by: Ross Burton <ross.bur...@arm.com> + +diff --git a/misc/mke2fs.conf.in b/misc/mke2fs.conf.in +index 01e35cf8..29f41dc0 100644 +--- a/misc/mke2fs.conf.in ++++ b/misc/mke2fs.conf.in +@@ -16,7 +16,6 @@ + } + small = { + blocksize = 1024 +- inode_size = 128 + inode_ratio = 4096 + } + floppy = { diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.46.2.bb b/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.46.2.bb index fc022f37de..94243296ae 100644 --- a/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.46.2.bb +++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.46.2.bb @@ -10,6 +10,7 @@ SRC_URI += "file://remove.ldconfig.call.patch \ SRC_URI_append_class-native = " file://e2fsprogs-fix-missing-check-for-permission-denied.patch \ file://quiet-debugfs.patch \ + file://big-inodes-for-small-fs.patch \ " -- 2.25.1
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