Commit Graph

8 Commits

Author SHA1 Message Date
Artem Bityutskiy ba2f48f70e UBIFS: mark unused key objects as invalid
When scanning the flash, UBIFS builds a list of flash nodes of type
'struct ubifs_scan_node'. Each scanned node has a 'snod->key' field. This field
is valid for most of the nodes, but invalid for some node type, e.g., truncation
nodes. It is safer to explicitly initialize such keys to something invalid,
rather than leaving them initialized to all zeros, which has key type of
UBIFS_INO_KEY.

This patch introduces new "fake" key type UBIFS_INVALID_KEY and initializes
unused 'snod->key' objects to this type. It also adds debugging assertions in
the TNC code to make sure no one ever tries to look these nodes up in the TNC.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2010-08-30 10:19:08 +03:00
Artem Bityutskiy e3c3efc243 UBIFS: add inode size debugging check
Add one more check to UBIFS - a check that makes sure that there
are no data nodes beyond inode size. And few commantaries fixes
along the line.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Reviewed-by: Adrian Hunter <Adrian.Hunter@nokia.com>
2009-09-10 09:58:11 +03:00
Subrata Modak b5148da40c UBIFS: remove unused functions
Remove 'xent_key_init_hash()' and 'data_key_init_flash()' functions,
as they are unot used anywhere.

Signed-off-by: Subrata Modak <subrata@linux.vnet.ibm.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-07-24 15:14:54 +03:00
Artem Bityutskiy cb4f952db3 UBIFS: amend key_hash return value
... which should be uint32_t, not int.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-03-08 13:29:41 +02:00
Kukkonen Mika 5dd7cbc083 UBIFS: avoid unnecessary checks
I have a habit of compiling kernel with
EXTRA_CFLAGS="-Wextra -Wno-unused -Wno-sign-compare -Wno-missing-field-initializers"
and so fs/ubifs/key.h give lots (~10) of these every time:

CC      fs/ubifs/tnc_misc.o
In file included from fs/ubifs/ubifs.h:1725,
from fs/ubifs/tnc_misc.c:30:
fs/ubifs/key.h: In function 'key_r5_hash':
fs/ubifs/key.h:64: warning: comparison of unsigned expression >= 0 is always true
fs/ubifs/key.h: In function 'key_test_hash':
fs/ubifs/key.h:81: warning: comparison of unsigned expression >= 0 is always true

This patch fixes the warnings.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-12-03 13:14:11 +02:00
Harvey Harrison 0ecb9529a4 UBIFS: endian handling fixes and annotations
Noticed by sparse:
fs/ubifs/file.c:75:2: warning: restricted __le64 degrades to integer
fs/ubifs/file.c:629:4: warning: restricted __le64 degrades to integer
fs/ubifs/dir.c:431:3: warning: restricted __le64 degrades to integer

This should be checked to ensure the ubifs_assert is working as
intended, I've done the suggested annotation in this patch.

fs/ubifs/sb.c:298:6: warning: incorrect type in assignment (different base types)
fs/ubifs/sb.c:298:6:    expected int [signed] [assigned] tmp
fs/ubifs/sb.c:298:6:    got restricted __le64 [usertype] <noident>
fs/ubifs/sb.c:299:19: warning: incorrect type in assignment (different base types)
fs/ubifs/sb.c:299:19:    expected restricted __le64 [usertype] atime_sec
fs/ubifs/sb.c:299:19:    got int [signed] [assigned] tmp
fs/ubifs/sb.c:300:19: warning: incorrect type in assignment (different base types)
fs/ubifs/sb.c:300:19:    expected restricted __le64 [usertype] ctime_sec
fs/ubifs/sb.c:300:19:    got int [signed] [assigned] tmp
fs/ubifs/sb.c:301:19: warning: incorrect type in assignment (different base types)
fs/ubifs/sb.c:301:19:    expected restricted __le64 [usertype] mtime_sec
fs/ubifs/sb.c:301:19:    got int [signed] [assigned] tmp

This looks like a bugfix as your tmp was a u32 so there was truncation in
the atime, mtime, ctime value, probably not intentional, add a tmp_le64
and use it here.

fs/ubifs/key.h:348:9: warning: cast to restricted __le32
fs/ubifs/key.h:348:9: warning: cast to restricted __le32
fs/ubifs/key.h:419:9: warning: cast to restricted __le32

Read from the annotated union member instead.

fs/ubifs/recovery.c:175:13: warning: incorrect type in assignment (different base types)
fs/ubifs/recovery.c:175:13:    expected unsigned int [unsigned] [usertype] save_flags
fs/ubifs/recovery.c:175:13:    got restricted __le32 [usertype] flags
fs/ubifs/recovery.c:186:13: warning: incorrect type in assignment (different base types)
fs/ubifs/recovery.c:186:13:    expected restricted __le32 [usertype] flags
fs/ubifs/recovery.c:186:13:    got unsigned int [unsigned] [usertype] save_flags

Do byteshifting at compile time of the flag value.  Annotate the saved_flags
as le32.

fs/ubifs/debug.c:368:10: warning: cast to restricted __le32
fs/ubifs/debug.c:368:10: warning: cast from restricted __le64

Should be checked if the truncation was intentional, I've changed the
printk to print the full width.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-11-06 11:06:19 +02:00
Adrian Hunter 4793e7c5e1 UBIFS: add bulk-read facility
Some flash media are capable of reading sequentially at faster rates.
UBIFS bulk-read facility is designed to take advantage of that, by
reading in one go consecutive data nodes that are also located
consecutively in the same LEB.

Read speed on Arm platform with OneNAND goes from 17 MiB/s to
19 MiB/s.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
2008-09-30 11:12:56 +03:00
Artem Bityutskiy 1e51764a3c UBIFS: add new flash file system
This is a new flash file system. See
http://www.linux-mtd.infradead.org/doc/ubifs.html

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
2008-07-15 17:35:15 +03:00