linux-toradex.git/fs/ubifs/io.c, branch v3.2.34

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

UBIFS: remove unnecessary stack variable

2011-05-16T07:31:40+00:00

This is patch removes an unnecessary 'offs' variable from 'ubifs_wbuf_write_nolock()'
- we can just keep 'wbuf->offs' up-to-date instead. This patch is very minor
the only motivation for it was that it is cleaner to keep wbuf->offs up-to-date
by the time we call 'ubifs_leb_write()'.

Signed-off-by: Artem Bityutskiy

UBIFS: fix minor stylistic issues

2011-05-13T16:23:53+00:00

Fix several minor stylistic issues:
* lines longer than 80 characters
* space before closing parenthesis ')'
* spaces in the indentations

Signed-off-by: Artem Bityutskiy

UBIFS: use max_write_size for write-buffers

2011-03-08T08:12:49+00:00

Switch write-buffers from 'c->min_io_size' to 'c->max_write_size' which
presumably has to be more write speed-efficient. However, when write-buffer
is synchronized, write only the the min. I/O units which contain the
data, do not write whole write-buffer. This is more space-efficient.

Additionally, this patch takes into account that the LEB might not start
from the max. write unit-aligned address.

Signed-off-by: Artem Bityutskiy