Commit Graph

20 Commits

Author SHA1 Message Date
Jerzy Grzegorek
086f333f39 Normalize separator size to 80
Signed-off-by: Jerzy Grzegorek <jerzy.grzegorek@trzebnica.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-06-07 10:54:54 +02:00
Yann E. MORIN
d8286a993a package/genext2fs: add host variant
genext2fs is built only if the user selected an ext2 root filesystem.

However, some use-cases can't live with the full target/ dir on the
root filesystem, and requires separate partitions (eg. for /usr).
In this case, the user would not select an ext2 root fs in the
Buildrooot menu, and would only generate a tarball of the rootfs.
This tarball would then be used from a post-image script to build
the actual required FSes.

But then, genext2fs is not built, since the ext2 root FS was not
selected.

As for the other filesystem generators, provide a host variant of
genext2fs (genext2fs is already host-package aware, so only needs
adding a Kconfig entry).

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-06-03 23:06:30 +02:00
Yann E. MORIN
60474dcec6 fs/ext2: further fix to the UUID
Turned out that setting a nil-UUID is no better than clearing it.

What currently happens is as follows:
  - first, genext2fs does not generate a UUID
  - then we tune2fs to upgrade the filesystem
  - then we run fsck, which generates a random UUID
  - then we re-run tune2fs to set a nil-UUID

So, on the target, if the file system is improperly unmounted (eg.
with a power failure), on next boot, fsck may be run, and a new
random UUID will be generated.

*However*, fsck improperly updates the filesystem when it adds the
UUID, and there are a few group descriptor checksum errors.

Those errors will go undetected until the next fsck, which will then
block for user input (bad on embedded systems, bad).

Fix that by systematically generating a random UUID _before_ we call
to fsck.

A random UUID is not so bad, after all, since there are already so
many sources of unpredictability in the filesystem: files date and
ordering, files content (date, paths...) which renders a fixed UUID
unneeded.

And it is still possible to set the UUID in a post-image script if
needed, anyway.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Peter Korsgaard <jacmet@uclibc.org>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-05-29 00:18:37 +02:00
Yann E. MORIN
a9825c06b8 fs/ext2: explicitly set a NULL UUID
"tune2fs -U clear" creates an invalid filesystem, that fsck.ext2
whines about later:

    $ make rootfs-ext2
    [--SNIP--]

    $ ./host/usr/sbin/fsck.ext4 images/rootfs.ext2
    e2fsck 1.42.7 (21-Jan-2013)
    Filesystem did not have a UUID; generating one.
    images/rootfs.ext2: clean, 4616/5120 files, 53171/131072 blocks

    $ ./host/usr/sbin/fsck.ext4 -f images/rootfs.ext2
    e2fsck 1.42.7 (21-Jan-2013)
    One or more block group descriptor checksums are invalid.  Fix<y>? yes
    Group descriptor 0 checksum is 0x4131, should be 0x8bdb.  FIXED.
    [--SNIP--]

So we set an explicitly NULL UUID instead.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-05-28 12:38:30 +02:00
Gustavo Zacarias
5419651bfa fs/common: add support for LZO and XZ compression methods
Add support for LZO and XZ compression methods to cpio, ext2, tar and
ubifs filesystem targets.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-04-24 22:18:13 +02:00
Peter Korsgaard
0fab0a4afd fs/ext2: bump journal overhead to 1300 blocks
A quick test with a ~3.5MB ext4 filesystem shows that 1081 blocks isn't
enough:

tune2fs 1.42.7 (21-Jan-2013)

Please run e2fsck on the filesystem.

Creating journal inode:
Journal size too big for filesystem.

So bump it a bit. Overestimating the journal size is probably not really
a big deal for the kind of systems using ext3/4 anyway.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-04-12 14:57:36 +02:00
Yann E. MORIN
a2a266e0cf fs/ext2: remove count- and time-based fsck
Set the count- and time-based checks intervals to 0, thus effectively
disabling automatic checks at boot (after a suggestion by Arnout).

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-04-12 14:45:47 +02:00
Yann E. MORIN
5fd27fc849 fs/ext2: add support for ext2 rev0 and rev1
Some bootloaders have a buggy ext2 support, and require ext2 rev1
instead of the traditional ext2 rev0 that genext2fs produces.

tune2fs accepts only one '-O list' at a time, so we need to construct
a list of -O options.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-04-12 14:43:22 +02:00
Yann E. MORIN
aaefab09c7 fs/ext2: add a symlink 'rootfs.ext#' -> 'rootfs.ext2'
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-04-12 14:42:31 +02:00
Yann E. MORIN
69036c20f1 fs/ext2: add ability to build ext3/4 too
Use the host-e2fsprogs to tune2fs the generated rootfs.ext2 image,
and upgrade it to either one of ext2, ext3 or ext4.

Since calling tune2fs may require running e2fsck (tune2fs will warn
to do so when certain FS options are changed), we systematically call
e2fsck. This makes the code path simpler, and as a side-effect checks
that genext2fs did not generate garbage.

In turn, e2fsck will unconditionally add a UUID to the filesystem,
which is bad for reproducibility, so we call tune2fs again to remove
the UUID. This does not require checking the filesystem.

To ensure compatibility of Buildroot's .config, leave ext2 as the
default. Boards' .config can override this at will.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Peter Korsgaard <jacmet@uclibc.org>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-04-12 14:39:24 +02:00
Yann E. MORIN
5fbef61480 fs/ext2: enclose the ext2 options in if...endif
Use a 'if...endif' construct instead of repeating the
'depends on' for each symbols.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Acked-by: Arnout Vandecappelle <arnout@mind.be>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-04-12 14:39:04 +02:00
Arnout Vandecappelle (Essensium/Mind)
847895d295 fs/common.mk: delay evaluation of variables
This makes things easier to understand and more consistent with the pkg-infra.
For example, it removes the need for '$$@' in the CMD variables of fs/*/*.mk.

It also makes it possible to update the variables later, e.g. in the package
override file.

It also makes sure that the date will be recorded correctly in Yann E. Morin's
patch that logs the MESSAGE macros to a file.

The fs/*/*.mk must be updated as well because the '$@' shouldn't be quoted
anymore in the CMD variables or the hooks.

The $(eval ...) for the dependencies is redundant, because the $(ROOTFS_TARGET)
variable is already eval'd. Note that it is only redundant if the evaluation of
the uses of the variable is also delayed.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-01-20 20:53:29 +01:00
Peter Korsgaard
acd062778f fs/ext2: remove redundant BR2_TARGET_ROOTFS_EXT2_SQUASH option
The generic fs handling does a chmod -R 0:0 $(TARGET_DIR), so there's no
need for a specific option to enforce this when making an ext2fs image.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-01-14 11:15:28 +01:00
Peter Korsgaard
319815a5d5 fs/ext2: don't enable by default
It's pretty uncommon to use ext2fs on embedded systems, so don't enable
it by default.

Adjust defconfigs to match.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-01-14 10:12:23 +01:00
Peter Korsgaard
eeea3ea6a8 genext2fs.sh: improve number of blocks calculation
Closes #2929

Instead of just adding a fixed amount to the blocks used, try to
estimate the real space needed according to the filesystem structure
(bitmaps, inodes, blocks).

The side effect of this is that we no longer significantly overestimate
the size needed for small file systems.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-30 23:10:21 +01:00
Peter Korsgaard
fb951b9342 fs/ext2: fix blocks/inodes calculation
With the ROOTFS_TARGET conversion, EXT2_OPTS gets evaluated very early
(before TARGET_DIR is populated with files), so the calculated
blocks/inodes numbers are wrong.

Fix it by moving the calculation to a shell script wrapper around
genext2fs, so it only gets executed just before genext2fs runs.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-04-19 14:33:14 +02:00
Peter Korsgaard
7b7e1bc3fb fs/ext2: fix typo
BR2_TARGET_ROOTFS_EXT2_RESBLKS is an int, so test against 0 rather than
the empty string - Otherwise the test is always true and a -m option
without arguments is added to the argument list, causing genext2fs to
get confused.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-04-19 11:03:45 +02:00
Thomas Petazzoni
0b79c5022d fs/*/Config.in: remove useless configuration comments
The dependency on gzip, bzip2 and lzma are properly handled
automatically. No need to tell the user about this.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-04-09 11:04:36 +02:00
Thomas Petazzoni
3474716bff Coherent naming for .mk files in fs/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-04-09 11:04:36 +02:00
Thomas Petazzoni
0585241505 Move all filesystem generation code to fs/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-04-09 11:04:36 +02:00