linux-toradex.git/fs/ubifs/io.c, branch v3.6.9

UBI: Kill data type hint

2012-05-20T17:25:59+00:00

We do not need this feature and to our shame it even was not working
and there was a bug found very recently.
	-- Artem Bityutskiy

Without the data type hint UBI2 (fastmap) will be easier to implement.

Signed-off-by: Richard Weinberger 
Signed-off-by: Artem Bityutskiy

UBIFS: rename dumping functions

2012-05-16T16:15:56+00:00

This commit re-names all functions which dump something from "dbg_dump_*()" to
"ubifs_dump_*()". This is done for consistency with UBI and because this way it
will be more logical once we remove the debugging sompilation option.

Signed-off-by: Artem Bityutskiy

UBIFS: get rid of dbg_dump_stack

2012-05-16T16:04:54+00:00

In case of errors we almost always need the stack dump - it makes no sense
to compile it out. Remove the 'dbg_dump_stack()' function completely.

Signed-off-by: Artem Bityutskiy

UBIFS: remove custom list of superblocks

2011-07-04T07:54:33+00:00

This is a clean-up of the power-cut emulation code - remove the custom list of
superblocks which we maintained to find the superblock by the UBI volume
descriptor. We do not need that crud any longer, because now we can get the
superblock as a function argument.

Signed-off-by: Artem Bityutskiy

UBIFS: switch to ubifs_leb_write

2011-07-04T07:54:33+00:00

Stop using 'ubi_leb_write()' directly and switch to the 'ubifs_leb_write()'
helper.

Signed-off-by: Artem Bityutskiy

UBIFS: switch to ubifs_leb_read

2011-07-04T07:54:33+00:00

Instead of using 'ubi_read()' function directly, used the 'ubifs_leb_read()'
helper function instead. This allows to get rid of several redundant error
messages and make sure that we always have a stack dump on read errors.

Signed-off-by: Artem Bityutskiy

UBIFS: introduce more I/O helpers

2011-07-04T07:54:33+00:00

Introduce the following I/O helper functions: 'ubifs_leb_read()',
'ubifs_leb_write()', 'ubifs_leb_change()', 'ubifs_leb_unmap()',
'ubifs_leb_map()', 'ubifs_is_mapped().

The idea is to wrap all UBI I/O functions in order to encapsulate various
assertions and error path handling (error message, stack dump, switching to R/O
mode). And there are some other benefits of this which will be used in the
following patches.

This patch does not switch whole UBIFS to use these functions yet.

Signed-off-by: Artem Bityutskiy

UBIFS: always print stacktrace when switching to R/O mode

2011-07-04T07:54:33+00:00

When switching to R/O mode due to an I/O error, always dump the stack, not only
when debugging is enabled.

Signed-off-by: Artem Bityutskiy

UBIFS: assert no fixup when writing a node

2011-06-03T15:12:31+00:00

The current free space fixup can result in some writing to the UBI volume
when the space_fixup flag is set.

To catch instances where UBIFS is writing to the NAND while the space_fixup
flag is set, add an assert to ubifs_write_node().

Artem: tweaked the patch, added similar assertion to the write buffer
       write path.

Signed-off-by: Ben Gardiner 
Reviewed-by: Matthew L. Creech 
Signed-off-by: Artem Bityutskiy

UBIFS: synchronize write-buffer before switching to the next bud

2011-05-16T07:31:41+00:00

Currently when UBIFS fills up the current bud (which is the last in the journal
head) and switches to the next bud, it first writes the log reference node for
the next bud and only after this synchronizes the write-buffer of the previous
bud. This is not a big deal, but an unclean power cut may lead to a situation
when we have corruption in a next-to-last bud, although it is much more logical
that we have to have corruption only in the last bud.

This patch also removes write-buffer synchronization from
'ubifs_wbuf_seek_nolock()' because this is not needed anymore (we synchronize
the write-buffer explicitly everywhere now) and also because this is just
prone to various errors.

Signed-off-by: Artem Bityutskiy