Commit Graph

577 Commits

Author SHA1 Message Date
David Woodhouse a7790532f5 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
The SmartMedia FTL code depends on new kfifo bits from 2.6.33
2010-02-26 19:06:24 +00:00
Andrew Morton 91f8026603 JFFS2: avoid using C++ keyword `new' in userspace-visible header
Addresses http://bugzilla.kernel.org/show_bug.cgi?id=14995

Reported-by: R. Diez <rdiezmail-kernelbugzilla@yahoo.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-02-25 12:51:41 +00:00
Linus Torvalds bac5e54c29 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (38 commits)
  direct I/O fallback sync simplification
  ocfs: stop using do_sync_mapping_range
  cleanup blockdev_direct_IO locking
  make generic_acl slightly more generic
  sanitize xattr handler prototypes
  libfs: move EXPORT_SYMBOL for d_alloc_name
  vfs: force reval of target when following LAST_BIND symlinks (try #7)
  ima: limit imbalance msg
  Untangling ima mess, part 3: kill dead code in ima
  Untangling ima mess, part 2: deal with counters
  Untangling ima mess, part 1: alloc_file()
  O_TRUNC open shouldn't fail after file truncation
  ima: call ima_inode_free ima_inode_free
  IMA: clean up the IMA counts updating code
  ima: only insert at inode creation time
  ima: valid return code from ima_inode_alloc
  fs: move get_empty_filp() deffinition to internal.h
  Sanitize exec_permission_lite()
  Kill cached_lookup() and real_lookup()
  Kill path_lookup_open()
  ...

Trivial conflicts in fs/direct-io.c
2009-12-16 12:04:02 -08:00
Linus Torvalds 60d9aa758c Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (90 commits)
  jffs2: Fix long-standing bug with symlink garbage collection.
  mtd: OneNAND: Fix test of unsigned in onenand_otp_walk()
  mtd: cfi_cmdset_0002, fix lock imbalance
  Revert "mtd: move mxcnd_remove to .exit.text"
  mtd: m25p80: add support for Macronix MX25L4005A
  kmsg_dump: fix build for CONFIG_PRINTK=n
  mtd: nandsim: add support for 4KiB pages
  mtd: mtdoops: refactor as a kmsg_dumper
  mtd: mtdoops: make record size configurable
  mtd: mtdoops: limit the maximum mtd partition size
  mtd: mtdoops: keep track of used/unused pages in an array
  mtd: mtdoops: several minor cleanups
  core: Add kernel message dumper to call on oopses and panics
  mtd: add ARM pismo support
  mtd: pxa3xx_nand: Fix PIO data transfer
  mtd: nand: fix multi-chip suspend problem
  mtd: add support for switching old SST chips into QRY mode
  mtd: fix M29W800D dev_id and uaddr
  mtd: don't use PF_MEMALLOC
  mtd: Add bad block table overrides to Davinci NAND driver
  ...

Fixed up conflicts (mostly trivial) in
	drivers/mtd/devices/m25p80.c
	drivers/mtd/maps/pcmciamtd.c
	drivers/mtd/nand/pxa3xx_nand.c
	kernel/printk.c
2009-12-16 10:23:43 -08:00
Christoph Hellwig 431547b3c4 sanitize xattr handler prototypes
Add a flags argument to struct xattr_handler and pass it to all xattr
handler methods.  This allows using the same methods for multiple
handlers, e.g. for the ACL methods which perform exactly the same action
for the access and default ACLs, just using a different underlying
attribute.  With a little more groundwork it'll also allow sharing the
methods for the regular user/trusted/secure handlers in extN, ocfs2 and
jffs2 like it's already done for xfs in this patch.

Also change the inode argument to the handlers to a dentry to allow
using the handlers mechnism for filesystems that require it later,
e.g. cifs.

[with GFS2 bits updated by Steven Whitehouse <swhiteho@redhat.com>]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-16 12:16:49 -05:00
David Woodhouse 2e16cfca6e jffs2: Fix long-standing bug with symlink garbage collection.
Ever since jffs2_garbage_collect_metadata() was first half-written in
February 2001, it's been broken on architectures where 'char' is signed.
When garbage collecting a symlink with target length above 127, the payload
length would end up negative, causing interesting and bad things to happen.

Cc: stable@kernel.org
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-12-16 03:27:20 +00:00
Jiri Kosina d014d04386 Merge branch 'for-next' into for-linus
Conflicts:

	kernel/irq/chip.c
2009-12-07 18:36:35 +01:00
André Goddard Rosa af901ca181 tree-wide: fix assorted typos all over the place
That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-12-04 15:39:55 +01:00
David Woodhouse 199bc9ff5c jffs2: Fix memory corruption in jffs2_read_inode_range()
In 2.6.23 kernel, commit a32ea1e1f9
("Fix read/truncate race") fixed a race in the generic code, and as a
side effect, now do_generic_file_read() can ask us to readpage() past
the i_size. This seems to be correctly handled by the block routines
(e.g. block_read_full_page() fills the page with zeroes in case if
somebody is trying to read past the last inode's block).

JFFS2 doesn't handle this; it assumes that it won't be asked to read
pages which don't exist -- and thus that there will be at least _one_
valid 'frag' on the page it's being asked to read. It will fill any
holes with the following memset:

  memset(buf, 0, min(end, frag->ofs + frag->size) - offset);

When the 'closest smaller match' returned by jffs2_lookup_node_frag() is
actually on a previous page and ends before 'offset', that results in:

  memset(buf, 0, <huge unsigned negative>);

Hopefully, in most cases the corruption is fatal, and quickly causing
random oopses, like this:

  root@10.0.0.4:~/ltp-fs-20090531# ./testcases/kernel/fs/ftest/ftest01
  Unable to handle kernel paging request for data at address 0x00000008
  Faulting instruction address: 0xc01cd980
  Oops: Kernel access of bad area, sig: 11 [#1]
  [...]
  NIP [c01cd980] rb_insert_color+0x38/0x184
  LR [c0043978] enqueue_hrtimer+0x88/0xc4
  Call Trace:
  [c6c63b60] [c004f9a8] tick_sched_timer+0xa0/0xe4 (unreliable)
  [c6c63b80] [c0043978] enqueue_hrtimer+0x88/0xc4
  [c6c63b90] [c0043a48] __run_hrtimer+0x94/0xbc
  [c6c63bb0] [c0044628] hrtimer_interrupt+0x140/0x2b8
  [c6c63c10] [c000f8e8] timer_interrupt+0x13c/0x254
  [c6c63c30] [c001352c] ret_from_except+0x0/0x14
  --- Exception: 901 at memset+0x38/0x5c
      LR = jffs2_read_inode_range+0x144/0x17c
  [c6c63cf0] [00000000] (null) (unreliable)

This patch fixes the issue, plus fixes all LTP tests on NAND/UBI with
JFFS2 filesystem that were failing since 2.6.23 (seems like the bug
above also broke the truncation).

Reported-By: Anton Vorontsov <avorontsov@ru.mvista.com>
Tested-By: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-11-30 13:52:40 -08:00
Roel Kluin 0fed784b0f JFFS2: fix min/max confusion
MAX_SUMMARY_SIZE was meant as a limit, not as a minimum

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-11-30 09:59:48 +00:00
Roel Kluin e670e41ae0 jffs2: Fix error return in jffs2_do_read_inode_internal()
The returned error should stay negative

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-11-30 09:52:32 +00:00
Linus Torvalds a7c367b95a Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (58 commits)
  mtd: jedec_probe: add PSD4256G6V id
  mtd: OneNand support for Nomadik 8815 SoC (on NHK8815 board)
  mtd: nand: driver for Nomadik 8815 SoC (on NHK8815 board)
  m25p80: Add Spansion S25FL129P serial flashes
  jffs2: Use SLAB_HWCACHE_ALIGN for jffs2_raw_{dirent,inode} slabs
  mtd: sh_flctl: register sh_flctl using platform_driver_probe()
  mtd: nand: txx9ndfmc: transfer 512 byte at a time if possible
  mtd: nand: fix tmio_nand ecc correction
  mtd: nand: add __nand_correct_data helper function
  mtd: cfi_cmdset_0002: add 0xFF intolerance for M29W128G
  mtd: inftl: fix fold chain block number
  mtd: jedec: fix compilation problem with I28F640C3B definition
  mtd: nand: fix ECC Correction bug for SMC ordering for NDFC driver
  mtd: ofpart: Check availability of reg property instead of name property
  driver/Makefile: Initialize "mtd" and "spi" before "net"
  mtd: omap: adding DMA mode support in nand prefetch/post-write
  mtd: omap: add support for nand prefetch-read and post-write
  mtd: add nand support for w90p910 (v2)
  mtd: maps: add mtd-ram support to physmap_of
  mtd: pxa3xx_nand: add single-bit error corrections reporting
  ...
2009-09-23 10:07:49 -07:00
Alexey Dobriyan ac4cfdd6d1 const: mark remaining export_operations const
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-22 07:17:24 -07:00
David Woodhouse 6469f540ea Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
	drivers/mtd/mtdcore.c

Merged in order that I can apply the Nomadik nand/onenand support patches.
2009-09-20 05:55:36 -07:00
David Woodhouse dd799983e9 jffs2: Use SLAB_HWCACHE_ALIGN for jffs2_raw_{dirent,inode} slabs
We may end up doing DMA to/from these. Until the new MTD API fixes the
issues, this should stop things from falling over.

Original idea from Gilles Casse <list@gcasse.net>

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-09-19 16:14:01 -07:00
Linus Torvalds 18f4c64477 jffs2/jfs/xfs: switch over to 'check_acl' rather than 'permission()'
This avoids an indirect call in the VFS for each path component lookup.

Well, at least as long as you own the directory in question, and the ACL
check is unnecessary.

Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-08 11:09:04 -07:00
Gerard Lledo 91e0955b57 jffs2: move jffs2_gcd_mtd threads to the new kthread API
Move the jffs2 garbage collecting thread to the new kthread API.

Signed-off-by: Gerard Lledo <gerard.lledo@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-09-04 09:53:35 +01:00
Massimo Cirillo bc8cec0dff JFFS2: add missing verify buffer allocation/deallocation
The function jffs2_nor_wbuf_flash_setup() doesn't allocate the verify buffer
if CONFIG_JFFS2_FS_WBUF_VERIFY is defined, so causing a kernel panic when
that macro is enabled and the verify function is called. Similarly the
jffs2_nor_wbuf_flash_cleanup() must free the buffer if
CONFIG_JFFS2_FS_WBUF_VERIFY is enabled.
The following patch fixes the problem.
The following patch applies to 2.6.30 kernel.

Signed-off-by: Massimo Cirillo <maxcir@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@kernel.org
2009-09-03 15:01:34 +01:00
Anders Grafström 57ca7deb06 jffs2: Fix return value from jffs2_do_readpage_nolock()
This fixes "kernel BUG at fs/jffs2/file.c:251!".
This pseudocode hopefully illustrates the scenario that triggers it:

jffs2_write_begin {
     jffs2_do_readpage_nolock {
         jffs2_read_inode_range {
             jffs2_read_dnode {
                 Data CRC 33c102e9 != calculated CRC 0ef77e7b for node at 005d42e4
                 return -EIO;
             }
         }
         ClearPageUptodate(pg);
         return 0;
     }
}

jffs2_write_end {
     BUG_ON(!PageUptodate(pg));
}

Signed-off-by: Anders Grafström <grfstrm@users.sourceforge.net>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-08-04 12:13:06 +01:00
Alexey Dobriyan 405f55712d headers: smp_lock.h redux
* Remove smp_lock.h from files which don't need it (including some headers!)
* Add smp_lock.h to files which do need it
* Make smp_lock.h include conditional in hardirq.h
  It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT

  This will make hardirq.h inclusion cheaper for every PREEMPT=n config
  (which includes allmodconfig/allyesconfig, BTW)

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-12 12:22:34 -07:00
Joe Perches ad361c9884 Remove multiple KERN_ prefixes from printk formats
Commit 5fd29d6ccb ("printk: clean up
handling of log-levels and newlines") changed printk semantics.  printk
lines with multiple KERN_<level> prefixes are no longer emitted as
before the patch.

<level> is now included in the output on each additional use.

Remove all uses of multiple KERN_<level>s in formats.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-08 10:30:03 -07:00
Linus Torvalds 5c5d4e8eaf Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6:
  mtd: nand: fix build failure and incorrect return from omap_wait()
  mtd: Use BLOCK_NIL consistently in NFTL/INFTL
  mtd: m25p80 timeout too short for worst-case m25p16 devices
  mtd: atmel_nand: Fix typo s/parititions/partitions/
  mtd: cmdlineparts: Use 64-bit format when printing a debug message.
  mtd: maps: Remove BUS_ID_SIZE from integrator_flash
  jffs2: fix another potential leak on error path in scan.c
2009-07-01 11:25:46 -07:00
Al Viro 72c04902d1 Get "no acls for this inode" right, fix shmem breakage
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-24 16:58:48 -04:00
Al Viro 073aaa1b14 helpers for acl caching + switch to those
helpers: get_cached_acl(inode, type), set_cached_acl(inode, type, acl),
forget_cached_acl(inode, type).

ubifs/xattr.c needed includes reordered, the rest is a plain switchover.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-24 08:17:07 -04:00
Al Viro 290c263bf8 switch jffs2 to inode->i_acl
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-24 08:17:05 -04:00
David Woodhouse 4839641333 jffs2: fix another potential leak on error path in scan.c
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-06-23 01:34:19 +01:00
Linus Torvalds ac1b7c378e Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (63 commits)
  mtd: OneNAND: Allow setting of boundary information when built as module
  jffs2: leaking jffs2_summary in function jffs2_scan_medium
  mtd: nand: Fix memory leak on txx9ndfmc probe failure.
  mtd: orion_nand: use burst reads with double word accesses
  mtd/nand: s3c6400 support for s3c2410 driver
  [MTD] [NAND] S3C2410: Use DIV_ROUND_UP
  [MTD] [NAND] S3C2410: Deal with unaligned lengths in S3C2440 buffer read/write
  [MTD] [NAND] S3C2410: Allow the machine code to get the BBT table from NAND
  [MTD] [NAND] S3C2410: Added a kerneldoc for s3c2410_nand_set
  mtd: physmap_of: Add multiple regions and concatenation support
  mtd: nand: max_retries off by one in mxc_nand
  mtd: nand: s3c2410_nand_setrate(): use correct macros for 2412/2440
  mtd: onenand: add bbt_wait & unlock_all as replaceable for some platform
  mtd: Flex-OneNAND support
  mtd: nand: add OMAP2/OMAP3 NAND driver
  mtd: maps: Blackfin async: fix memory leaks in probe/remove funcs
  mtd: uclinux: mark local stuff static
  mtd: uclinux: do not allow to be built as a module
  mtd: uclinux: allow systems to override map addr/size
  mtd: blackfin NFC: fix hang when using NAND on BF527-EZKITs
  ...
2009-06-22 16:56:22 -07:00
Christian Engelmayer a2ab0ce09e jffs2: leaking jffs2_summary in function jffs2_scan_medium
In case of an error returned by file_dirty() 's' is not freed as the cleanup
path is skipped.

Reported by Coverity.

Signed-off-by: Christian Engelmayer <christian.engelmayer@frequentis.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-06-15 11:17:46 +01:00
Christoph Hellwig d579ed00aa jffs2: call jffs2_write_super from jffs2_sync_fs
The call to ->write_super from __sync_filesystem will go away, so make
sure jffs2 performs the same actions from inside ->sync_fs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-11 21:36:16 -04:00
Alessio Igor Bogani 337eb00a2c Push BKL down into ->remount_fs()
[xfs, btrfs, capifs, shmem don't need BKL, exempt]

Signed-off-by: Alessio Igor Bogani <abogani@texware.it>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-11 21:36:11 -04:00
Christoph Hellwig ebc1ac1645 ->write_super lock_super pushdown
Push down lock_super into ->write_super instances and remove it from the
caller.

Following filesystem don't need ->s_lock in ->write_super and are skipped:

 * bfs, nilfs2 - no other uses of s_lock and have internal locks in
	->write_super
 * ext2 - uses BKL in ext2_write_super and has internal calls without s_lock
 * reiserfs - no other uses of s_lock as has reiserfs_write_lock (BKL) in
 	->write_super
 * xfs - no other uses of s_lock and uses internal lock (buffer lock on
	superblock buffer) to serialize ->write_super.  Also xfs_fs_write_super
	is superflous and will go away in the next merge window

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-11 21:36:09 -04:00
Christoph Hellwig 01ba687577 jffs2: move jffs2_write_super to super.c
jffs2_write_super is only called from super.c and doesn't use any
functionality from fs.c.  So move it over to super.c and make it
static there.

[should go in through the vfs tree as it is a requirement for the
 next patch]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-11 21:36:09 -04:00
Christoph Hellwig 6cfd014842 push BKL down into ->put_super
Move BKL into ->put_super from the only caller.  A couple of
filesystems had trivial enough ->put_super (only kfree and NULLing of
s_fs_info + stuff in there) to not get any locking: coda, cramfs, efs,
hugetlbfs, omfs, qnx4, shmem, all others got the full treatment.  Most
of them probably don't need it, but I'd rather sort that out individually.
Preferably after all the other BKL pushdowns in that area.

[AV: original used to move lock_super() down as well; these changes are
removed since we don't do lock_super() at all in generic_shutdown_super()
now]
[AV: fuse, btrfs and xfs are known to need no damn BKL, exempt]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-11 21:36:07 -04:00
Christoph Hellwig 8c85e12512 remove ->write_super call in generic_shutdown_super
We just did a full fs writeout using sync_filesystem before, and if
that's not enough for the filesystem it can perform it's own writeout
in ->put_super, which many filesystems already do.

Move a call to foofs_write_super into every foofs_put_super for now to
guarantee identical behaviour until it's cleaned up by the individual
filesystem maintainers.

Exceptions:

 - affs already has identical copy & pasted code at the beginning of
   affs_put_super so no need to do it twice.
 - xfs does the right thing without it and I have changes pending for
   the xfs tree touching this are so I don't really need conflicts
   here..

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-11 21:36:06 -04:00
Joakim Tjernlund 81e2962801 jffs2: Fix corruption when flash erase/write failure
Erase errors such as:
"Newly-erased block contained word 0xa4ef223e at offset 0x0296a014"
and failure to write the clean marker,
moves the offending erase block to erasing list before calling
jffs2_erase_failed(). This is bad as jffs2_erase_failed() will
also move the block to the bad_list, but is now moving the
wrong block, causing FS corruption.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-05-29 10:44:46 +01:00
Linus Torvalds 22ae77bc7a Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (53 commits)
  [MTD] struct device - replace bus_id with dev_name(), dev_set_name()
  [MTD] [NOR] Fixup for Numonyx M29W128 chips
  [MTD] mtdpart: Make ecc_stats more realistic.
  powerpc/85xx: TQM8548: Update DTS file for multi-chip support
  powerpc: NAND: FSL UPM: document new bindings
  [MTD] [NAND] FSL-UPM: Add wait flags to support board/chip specific delays
  [MTD] [NAND] FSL-UPM: add multi chip support
  [MTD] [NOR] Add device parent info to physmap_of
  [MTD] [NAND] Add support for NAND on the Socrates board
  [MTD] [NAND] Add support for 4KiB pages.
  [MTD] sysfs support should not depend on CONFIG_PROC_FS
  [MTD] [NAND] Add parent info for CAFÉ controller
  [MTD] support driver model updates
  [MTD] driver model updates (part 2)
  [MTD] driver model updates
  [MTD] [NAND] move gen_nand's probe function to .devinit.text
  [MTD] [MAPS] move sa1100 flash's probe function to .devinit.text
  [MTD] fix use after free in register_mtd_blktrans
  [MTD] [MAPS] Drop now unused sharpsl-flash map
  [MTD] ofpart: Check name property to determine partition nodes.
  ...

Manually fix trivial conflict in drivers/mtd/maps/Makefile
2009-04-06 14:56:26 -07:00
Al Viro ce3b0f8d5c New helper - current_umask()
current->fs->umask is what most of fs_struct users are doing.
Put that into a helper function.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-03-31 23:00:26 -04:00
Roel Kluin fc371a25ea [JFFS2] jffs2_acl_count() tests < 0 on unsigned
size_t s is unsigned and cannot be less than 0.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-03-20 13:18:50 +00:00
Wei Yongjun c6d59cdd41 [JFFS2] kmem_cache_alloc/memset -> kmem_cache_zalloc
Used kmem_cache_zalloc instead of kmem_cache_alloc/memset.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-03-20 12:24:45 +00:00
Thomas Gleixner 4c41bd0ec9 [JFFS2] fix mount crash caused by removed nodes
At scan time we observed following scenario:

   node A inserted
   node B inserted
   node C inserted -> sets overlapped flag on node B

   node A is removed due to CRC failure -> overlapped flag on node B remains

   while (tn->overlapped)
   	 tn = tn_prev(tn);

   ==> crash, when tn_prev(B) is referenced.

When the ultimate node is removed at scan time and the overlapped flag
is set on the penultimate node, then nothing updates the overlapped
flag of that node. The overlapped iterators blindly expect that the
ultimate node does not have the overlapped flag set, which causes the
scan code to crash.

It would be a huge overhead to go through the node chain on node
removal and fix up the overlapped flags, so detecting such a case on
the fly in the overlapped iterators is a simpler and reliable
solution.

Cc: stable@kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-02-21 11:09:29 +01:00
Andres Salomon efab0b5d3e [JFFS2] force the jffs2 GC daemon to behave a bit better
I've noticed some pretty poor behavior on OLPC machines after bootup, when
gdm/X are starting.  The GCD monopolizes the scheduler (which in turns
means it gets to do more nand i/o), which results in processes taking much
much longer than they should to start.

As an example, on an OLPC machine going from OFW to a usable X (via
auto-login gdm) takes 2m 30s.  The majority of this time is consumed by
the switch into graphical mode.  With this patch, we cut a full 60s off of
bootup time.  After bootup, things are much snappier as well.

Note that we have seen a CRC node error with this patch that causes the machine
to fail to boot, but we've also seen that problem without this patch.

Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-02-14 08:59:04 +00:00
Artem Bityutskiy ab5610b434 [JFFS2] remove junk prototypes
'rb_prev()', 'rb_next()' and 'rb_replace_node()' are declared in
include/linux/rbtree.h, no need for JFFS2 to re-declare them. I
believe these are left-overs from the old days when the common
RB tree code did not have those call and JFFS2 had private
implementation.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-01-09 21:05:21 +00:00
David Woodhouse 353816f43d Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
	arch/arm/mach-pxa/corgi.c
	arch/arm/mach-pxa/poodle.c
	arch/arm/mach-pxa/spitz.c
2009-01-05 10:50:33 +01:00
Nick Piggin 54566b2c15 fs: symlink write_begin allocation context fix
With the write_begin/write_end aops, page_symlink was broken because it
could no longer pass a GFP_NOFS type mask into the point where the
allocations happened.  They are done in write_begin, which would always
assume that the filesystem can be entered from reclaim.  This bug could
cause filesystem deadlocks.

The funny thing with having a gfp_t mask there is that it doesn't really
allow the caller to arbitrarily tinker with the context in which it can be
called.  It couldn't ever be GFP_ATOMIC, for example, because it needs to
take the page lock.  The only thing any callers care about is __GFP_FS
anyway, so turn that into a single flag.

Add a new flag for write_begin, AOP_FLAG_NOFS.  Filesystems can now act on
this flag in their write_begin function.  Change __grab_cache_page to
accept a nofs argument as well, to honour that flag (while we're there,
change the name to grab_cache_page_write_begin which is more instructive
and does away with random leading underscores).

This is really a more flexible way to go in the end anyway -- if a
filesystem happens to want any extra allocations aside from the pagecache
ones in ints write_begin function, it may now use GFP_KERNEL (rather than
GFP_NOFS) for common case allocations (eg.  ocfs2_alloc_write_ctxt, for a
random example).

[kosaki.motohiro@jp.fujitsu.com: fix ubifs]
[kosaki.motohiro@jp.fujitsu.com: fix fuse]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: <stable@kernel.org>		[2.6.28.x]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ Cleaned up the calling convention: just pass in the AOP flags
  untouched to the grab_cache_page_write_begin() function.  That
  just simplifies everybody, and may even allow future expansion of the
  logic.   - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-04 13:33:20 -08:00
David Woodhouse 0bc4382ae9 [JFFS2] Clean up fs/jffs2/compr_rubin.c
Triggered by a smaller cleanup from Jianjun Kong <jianjun@zeuux.org>

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-12-10 15:34:49 +00:00
Adrian Hunter 69423d99fc [MTD] update internal API to support 64-bit device size
MTD internal API presently uses 32-bit values to represent
device size.  This patch updates them to 64-bits but leaves
the external API unchanged.  Extending the external API
is a separate issue for several reasons.  First, no one
needs it at the moment.  Secondly, whether the implementation
is done with IOCTLs, sysfs or both is still debated.  Thirdly
external API changes require the internal API to be accepted
first.

Note that although the MTD API will be able to support 64-bit
device sizes, existing drivers do not and are not required
to do so, although NAND base has been updated.

In general, changing from 32-bit to 64-bit values cause little
or no changes to the majority of the code with the following
exceptions:
    	- printk message formats
    	- division and modulus of 64-bit values
    	- NAND base support
	- 32-bit local variables used by mtdpart and mtdconcat
	- naughtily assuming one structure maps to another
	in MEMERASE ioctl

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-12-10 13:37:21 +00:00
Linus Torvalds c361948712 Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6:
  [JFFS2] fix race condition in jffs2_lzo_compress()
  [MTD] [NOR] Fix cfi_send_gen_cmd handling of x16 devices in x8 mode (v4)
  [JFFS2] Fix lack of locking in thread_should_wake()
  [JFFS2] Fix build failure with !CONFIG_JFFS2_FS_WRITEBUFFER
  [MTD] [NAND] OMAP2: remove duplicated #include
2008-11-06 15:43:13 -08:00
Geert Uytterhoeven dc8a0843a4 [JFFS2] fix race condition in jffs2_lzo_compress()
deflate_mutex protects the globals lzo_mem and lzo_compress_buf.  However,
jffs2_lzo_compress() unlocks deflate_mutex _before_ it has copied out the
compressed data from lzo_compress_buf.  Correct this by moving the mutex
unlock after the copy.

In addition, document what deflate_mutex actually protects.

Cc: stable@kernel.org
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: Richard Purdie <rpurdie@openedhand.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-11-05 23:22:02 +01:00
David Woodhouse b27cf88e95 [JFFS2] Fix lack of locking in thread_should_wake()
The thread_should_wake() function trawls through the list of 'very
dirty' eraseblocks, determining whether the background GC thread should
wake. Doing this without holding the appropriate locks is a bad idea.

OLPC Trac #8615

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@kernel.org
2008-10-31 14:52:24 +00:00
Christoph Hellwig 3222a3e55f [PATCH] fix ->llseek for more directories
With this patch all directory fops instances that have a readdir
that doesn't take the BKL are switched to generic_file_llseek.

Signed-off-by: Christoph Hellwig <hch@lst.de>
2008-10-23 05:13:21 -04:00
David Woodhouse 8966c5e0fc [JFFS2] Use d_splice_alias() not d_add() in jffs2_lookup()
Now that JFFS2 can be exported by NFS, we need to get this right.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-10-23 05:13:12 -04:00
David Woodhouse 5f556aab90 [JFFS2] Reinstate NFS exportability
Now that the readdir/lookup deadlock issues have been dealt with, we can
export JFFS2 file systems again.

(For now, you have to specify fsid manually; we should add a method to
the export_ops to handle that too.)

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-10-23 05:13:07 -04:00
Steve Glendinning f04de505e3 [JFFS2] Fix build failure with !CONFIG_JFFS2_FS_WRITEBUFFER
Build failure introduced by 5bf1723723
[JFFS2] Write buffer offset adjustment for NOR-ECC (Sibley) flash

Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-21 13:37:43 +01:00
Alexander Belyakov 5bf1723723 [JFFS2] Write buffer offset adjustment for NOR-ECC (Sibley) flash
After choosing new c->nextblock, don't leave the wbuf offset field
occasionally pointing at the start of the next physical eraseblock.
This was causing a BUG() on NOR-ECC (Sibley) flash, where we start
writing after the cleanmarker.

Among other this fix should cover write buffer offset adjustment
after flushing the last page of an eraseblock.

Signed-off-by: Alexander Belyakov <abelyako@googlemail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-18 11:54:09 +01:00
Geert Uytterhoeven faa5c2a15e [JFFS2] Correct parameter names of jffs2_compress() in comments
Make the parameter names of jffs2_compress() in its comments match with the
actual implementation

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-17 15:56:44 +01:00
David Howells 3fc678a0e6 CRED: Wrap task credential accesses in the JFFS2 filesystem
Wrap access to task credentials so that they can be separated more easily from
the task_struct during the introduction of COW creds.

Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().

Change some task->e?[ug]id to task_e?[ug]id().  In some places it makes more
sense to use RCU directly rather than a convenient wrapper; these will be
addressed by later patches.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-09-01 11:32:59 +01:00
David Woodhouse 9d7548d4ca Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-09-01 11:32:13 +01:00
Alexey Dobriyan 31db6e9ea1 [JFFS2] Move JFFS2 config options out of fs/Kconfig
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-09-01 11:29:52 +01:00
Adrian Bunk 7a8fc9b248 removed unused #include <linux/version.h>'s
This patch lets the files using linux/version.h match the files that
#include it.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-23 12:14:12 -07:00
David Woodhouse 75caf6b5ac [JFFS2] Fill in f_fsid field in jffs2_statfs()
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-08-18 16:23:53 +01:00
Adrian Hunter bde86fec7c [JFFS2] Correct symlink name too long error code
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-08-14 09:58:29 +01:00
Adrian Hunter bb0eb217c9 [MTD] Define and use MTD_FAIL_ADDR_UNKNOWN instead of 0xffffffff
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-08-12 11:02:15 +01:00
David Woodhouse b7600dba6d [JFFS2] Fix allocation of summary buffer
We can't use vmalloc for the buffer we use for writing summaries,
because some drivers may want to DMA from it. So limit the size to 64KiB
and use kmalloc for it instead.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-08-01 10:07:51 +01:00
Linus Torvalds 9ee08c2df4 Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (57 commits)
  [MTD] [NAND] subpage read feature as a way to increase performance. 
  CPUFREQ: S3C24XX NAND driver frequency scaling support.
  [MTD][NAND] au1550nd: remove unused variable
  [MTD] jedec_probe: Fix SST 16-bit chip detection
  [MTD][MTDPART] Fix a division by zero bug
  [MTD][MTDPART] Cleanup and document the erase region handling
  [MTD][MTDPART] Handle most checkpatch findings
  [MTD][MTDPART] Seperate main loop from per-partition code in add_mtd_partition
  [MTD] physmap: resume already suspended chips on failure to suspend
  [MTD] physmap: Fix suspend/resume/shutdown bugs.
  [MTD] [NOR] Fix -ETIMEO errors in CFI driver
  [MTD] [NAND] fsl_elbc_nand: fix section mismatch with CONFIG_MTD_OF_PARTS=y
  [JFFS2] Use .unlocked_ioctl
  [MTD] Fix const assignment in the MTD command line partitioning driver
  [MTD] [NOR] gen_probe: No debug message when debugging is disabled
  [MTD] [NAND] remove __PPC__ hardcoded address from DiskOnChip drivers
  [MTD] [MAPS] Remove the bast-flash driver.
  [MTD] [NAND] fsl_elbc_nand: ecclayout cleanups
  [MTD] [NAND] fsl_elbc_nand: implement support for flash-based BBT
  [MTD] [NAND] fsl_elbc_nand: fix OOB workability for large page NAND chips
  ...
2008-07-26 20:30:56 -07:00
Al Viro e6305c43ed [PATCH] sanitize ->permission() prototype
* kill nameidata * argument; map the 3 bits in ->flags anybody cares
  about to new MAY_... ones and pass with the mask.
* kill redundant gfs2_iop_permission()
* sanitize ecryptfs_permission()
* fix remaining places where ->permission() instances might barf on new
  MAY_... found in mask.

The obvious next target in that direction is permission(9)

folded fix for nfs_permission() breakage from Miklos Szeredi <mszeredi@suse.cz>

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-07-26 20:53:14 -04:00
Alexey Dobriyan 51cc50685a SL*B: drop kmem cache argument from constructor
Kmem cache passed to constructor is only needed for constructors that are
themselves multiplexeres.  Nobody uses this "feature", nor does anybody uses
passed kmem cache in non-trivial way, so pass only pointer to object.

Non-trivial places are:
	arch/powerpc/mm/init_64.c
	arch/powerpc/mm/hugetlbpage.c

This is flag day, yes.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Jon Tollefson <kniht@linux.vnet.ibm.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Matt Mackall <mpm@selenic.com>
[akpm@linux-foundation.org: fix arch/powerpc/mm/hugetlbpage.c]
[akpm@linux-foundation.org: fix mm/slab.c]
[akpm@linux-foundation.org: fix ubifs]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-26 12:00:07 -07:00
Stoyan Gaydarov 0533400b78 [JFFS2] Use .unlocked_ioctl
This changes the .ioctl to the .unlocked_ioctl version.

Signed-off-by: Stoyan Gaydarov <stoyboyker@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-07-11 18:33:42 +01:00
Linus Torvalds 2c4aabcca8 Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6:
  [MTD][NOR] Add physical address to point() method
  [JFFS2] Track parent inode for directories (for NFS export)
  [JFFS2] Invert last argument of jffs2_gc_fetch_inode(), make it boolean.
  [JFFS2] Quiet lockdep false positive.
  [JFFS2] Clean up jffs2_alloc_inode() and jffs2_i_init_once()
  [MTD] Delete long-unused jedec.h header file.
  [MTD] [NAND] at91_nand: use at91_nand_{en,dis}able consistently.
2008-05-01 11:15:28 -07:00
Jared Hulbert a98889f3d8 [MTD][NOR] Add physical address to point() method
Adding the ability to get a physical address from point() in addition
to virtual address.  This physical address is required for XIP of
userspace code from flash.

Signed-off-by: Jared Hulbert <jaredeh@gmail.com>
Reviewed-by: Jörn Engel <joern@logfs.org>
Acked-by: Nicolas Pitre <nico@cam.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-05-01 18:59:11 +01:00
David Woodhouse 27c72b040c [JFFS2] Track parent inode for directories (for NFS export)
To support NFS export, we need to know the parent inode of directories.
Rather than growing the jffs2_inode_cache structure, share space with
the nlink field -- which was always set to 1 for directories anyway.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-05-01 18:47:17 +01:00
David Woodhouse 1b690b4878 [JFFS2] Invert last argument of jffs2_gc_fetch_inode(), make it boolean.
We don't actually care about nlink; we only care whether the inode in
question is unlinked or not.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-05-01 17:24:28 +01:00
David Woodhouse 590fe34c47 [JFFS2] Quiet lockdep false positive.
Don't hold f->sem while calling into jffs2_do_create(). It makes lockdep
unhappy, and we don't really need it -- the _reason_ it's a false
positive is because nobody else can see this inode yet and so nobody
will be trying to lock it anyway.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-05-01 15:53:28 +01:00
David Woodhouse 4e571aba7b [JFFS2] Clean up jffs2_alloc_inode() and jffs2_i_init_once()
Ditch a couple of pointless casts from void *, and use the normal
variable name 'f' for jffs2_inode_info pointers -- especially since
it actually shows up in lockdep reports.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-05-01 12:29:37 +01:00
Harvey Harrison 8e24eea728 fs: replace remaining __FUNCTION__ occurrences
__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-30 08:29:54 -07:00
David Woodhouse 2c61cb250c [JFFS2] Introduce dbg_readinode2 log level, use it to shut read_dnode() up
We haven't seen bugs in this for a while now, since the rewrite. No need
to be _quite_ so verbose...

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-23 16:43:15 +01:00
David Woodhouse 422b120238 [JFFS2] Fix jffs2_reserve_space() when all blocks are pending erasure.
When _all_ the blocks were on the erase_pending_list, we could't find a
block to GC from but there was no _actually_ free space, and
jffs2_reserve_space() would get a little unhappy.

Handle this case by returning -EAGAIN from jffs2_garbage_collect_pass().
There are two callers of that function -- jffs2_flush_wbuf_gc(), which
will interpret it as an error and flush the writebuffer by other means,
and jffs2_reserve_space(), which we modify to respond to -EAGAIN with an
immediate call to jffs2_erase_pending_blocks() and another run round the
loop.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-23 16:01:37 +01:00
David Woodhouse e2bc322bf0 [JFFS2] Add erase_checking_list to hold blocks being marked.
Just to keep the debug code happy when it's adding all the blocks up.
Otherwise, they disappear for a while while the locks are dropped to
check them and write the cleanmarker.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-23 14:15:24 +01:00
Anders Grafström 8a0f572397 [JFFS2] Return values of jffs2_block_check_erase error paths
It looks the error paths in jffs2_block_check_erase() have wrong return 
values. A block that failed to be erased never gets marked as bad.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-23 10:06:46 +01:00
David Woodhouse 19e56ceae7 [JFFS2] Finally remove redundant ref->__totlen field.
Haven't had any complaints about it recently, despite having the test
code enabled to verify that the calculated length is correct.

Kill it off, just by #undef TEST_TOTLEN for now; removing it for real
can come a little later.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-23 01:26:12 +01:00
David Woodhouse 27e6b8e388 [JFFS2] Honour TEST_TOTLEN macro in debugging code. ref->__totlen is going!
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-23 01:25:33 +01:00
David Woodhouse 85a62db624 [JFFS2] Add paranoia debugging for superblock counts
The problem fixed in commit 014b164e13
(space leak with in-band cleanmarkers) would have been caught a lot
quicker if our paranoid debugging mode had included adding up the size
counts from all the eraseblocks and comparing the totals with the counts
in the superblock. Add that.

Make jffs2_mark_erased_block() file the newly-erased block on the
free_list before calling the debug function, to make it happy.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-23 01:24:17 +01:00
David Woodhouse 014b164e13 [JFFS2] Fix free space leak with in-band cleanmarkers
We were accounting for the cleanmarker by calling jffs2_link_node_ref()
(without locking!), which adjusted both superblock and per-eraseblock
accounting, subtracting the size of the cleanmarker from {jeb,c}->free_size
and adding it to {jeb,c}->used_size.

But only _then_ were we adding the size of the newly-erased block back
to the superblock counts, and we were adding each of jeb->{free,used}_size
to the corresponding superblock counts. Thus, the size of the cleanmarker
was effectively subtracted from the superblock's free_size _twice_.

Fix this, by always adding a full eraseblock size to c->free_size when
we've erased a block. And call jffs2_link_node_ref() under the proper
lock, while we're at it.

Thanks to Alexander Yurchenko and/or Damir Shayhutdinov for (almost)
pinpointing the problem.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22 23:54:38 +01:00
David Woodhouse cf9d1e428c [JFFS2] Self-sufficient #includes in jffs2_fs_i.h: include <linux/mutex.h>
... instead of <linux/semaphore.h> which we don't need any more anyway.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22 23:53:26 +01:00
David Woodhouse ced2207036 [JFFS2] semaphore->mutex conversion
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22 15:13:40 +01:00
michael cca1584171 [JFFS2] add write verify on dataflash.
Add the write verification buffer to the dataflash.  The mtd_dataflash has
the CONFIG_DATAFLASH_WRITE_VERIFY so is better a change to Kconfig.

Signed-off-by: Michael Trimarchi <trimarchimichael@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22 12:35:50 +01:00
David Woodhouse 25dc30b4cd [JFFS2] fix sparse warnings in gc.c
fs/jffs2/gc.c:1147:29: warning: symbol 'jeb' shadows an earlier one
fs/jffs2/gc.c:1084:89: originally declared here
fs/jffs2/gc.c:1197:29: warning: symbol 'jeb' shadows an earlier one
fs/jffs2/gc.c:1084:89: originally declared here

Rename the unused 'jeb' argument to avoid this. We could potentially
remove the argument, but GCC should be doing that anyway.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22 12:35:47 +01:00
Harvey Harrison bf66737ca8 [JFFS2] fix sparse warning in write.c
fs/jffs2/write.c:585:28: warning: symbol 'fd' shadows an earlier one
fs/jffs2/write.c:536:27: originally declared here

No need to redeclare fd, use the original one, after this point,
fd is always reassigned before it used again.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22 12:35:46 +01:00
David Woodhouse 8ca646abb4 [JFFS2] Fix sparse warning in nodemgmt.c
fs/jffs2/nodemgmt.c:60:8: warning: symbol 'ret' shadows an earlier one
fs/jffs2/nodemgmt.c:45:6: originally declared here

(reported by Harvey Harrison)

Just remove the offending declaration of 'int ret' and use the earlier one.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22 12:35:44 +01:00
Harvey Harrison f876a59dae [JFFS2] include function prototype for jffs2_ioctl
fs/jffs2/ioctl.c:14:5: warning: symbol 'jffs2_ioctl' was not declared.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22 12:35:42 +01:00
David Woodhouse f838bad1b3 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-04-22 12:34:25 +01:00
Matthew Wilcox 6188e10d38 Convert asm/semaphore.h users to linux/semaphore.h
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
2008-04-18 22:22:54 -04:00
Alexey Korolev abe2f41430 JFFS2 Fix of panics caused by wrong condition for hole frag creation in write_begin
This fixes a regression introduced in commit
205c109a7a when switching to
write_begin/write_end operations in JFFS2.

The page offset is miscalculated, leading to corruption of the fragment
lists and subsequently to memory corruption and panics.

[ Side note: the bug is a fairly direct result of the naming.  Nick was
  likely misled by the use of "offs", since we tend to use the notion of
  "offset" not as an absolute position, but as an offset _within_ a page
  or allocation.

  Alternatively, a "pgoff_t" is a page index, but not a byte offset -
  our VM naming can be a bit confusing.

  So in this case, a VM person would likely have called this a "pos",
  not an "offs", or perhaps talked about byte offsets rather than page
  offsets (since it's counted in bytes, not pages).    - Linus ]

Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Signed-off-by: Vasiliy Leonenko <vasiliy.leonenko@mail.ru>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-14 15:43:14 -07:00
David Woodhouse dd919660aa [JFFS2] Use ALLOC_DELETION priority for truncation to zero length
This is going to obsolete all previous nodes, so treat it as deletion.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-02-25 15:25:25 +00:00
David Woodhouse b28ba9fa01 [JFFS2] Set i_blocks when truncating files
Addresses OLPC trac #6480

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-02-25 15:20:50 +00:00
Linus Torvalds a8e98d6d51 Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (120 commits)
  [MTD] Fix mtdoops.c compilation
  [MTD] [NOR] fix startup lock when using multiple nor flash chips
  [MTD] [DOC200x] eccbuf is statically defined and always evaluate to true
  [MTD] Fix maps/physmap.c compilation with CONFIG_PM
  [MTD] onenand: Add panic_write function to the onenand driver
  [MTD] mtdoops: Use the panic_write function when present
  [MTD] Add mtd panic_write function pointer
  [MTD] [NAND] Freescale enhanced Local Bus Controller FCM NAND support.
  [MTD] physmap.c: Add support for multiple resources
  [MTD] [NAND] Fix misparenthesization introduced by commit 78b65179...
  [MTD] [NAND] Fix Blackfin NFC ECC calculating bug with page size 512 bytes
  [MTD] [NAND] Remove wrong operation in PM function of the BF54x NFC driver
  [MTD] [NAND] Remove unused variable in plat_nand_remove
  [MTD] Unlocking all Intel flash that is locked on power up.
  [MTD] [NAND] at91_nand: Make mtdparts option can override board info
  [MTD] mtdoops: Various minor cleanups
  [MTD] mtdoops: Ensure sequential write to the buffer
  [MTD] mtdoops: Perform write operations in a workqueue
  [MTD] mtdoops: Add further error return code checking
  [MTD] [NOR] Test devtype, not definition in flash_probe(), drivers/mtd/devices/lart.c
  ...
2008-02-07 10:20:31 -08:00
David Howells 5451f79f5f iget: stop JFFS2 from using iget() and read_inode()
Stop the JFFS2 filesystem from using iget() and read_inode().  Replace
jffs2_read_inode() with jffs2_iget(), and call that instead of iget().
jffs2_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.

jffs2_do_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-07 08:42:28 -08:00
David Howells e231c2ee64 Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p)
Convert instances of ERR_PTR(PTR_ERR(p)) to ERR_CAST(p) using:

perl -spi -e 's/ERR_PTR[(]PTR_ERR[(](.*)[)][)]/ERR_CAST(\1)/' `grep -rl 'ERR_PTR[(]*PTR_ERR' fs crypto net security`

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-07 08:42:26 -08:00
Robert P. J. Day e1b8513d21 Typoes: "whith" -> "with"
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
2008-02-03 15:14:02 +02:00
David Woodhouse c1f3ee120b Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git 2008-02-03 18:30:32 +11:00
Julia Lawall 36f97bc617 [JFFS2] Add missing call to posix_acl_release
posix_acl_clone does a memory allocation and sets a reference count, so
posix_acl_release is needed afterwards to free it.

The problem was fixed using the following semantic patch.
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
type T;
identifier E;
expression E1, E2;
int ret;
statement S;
@@

  T E;
  <+...
(
  E = \(posix_acl_clone\|posix_acl_alloc\|posix_acl_dup\)(...);
  if (E == NULL) S
|
  if ((E = \(posix_acl_clone\|posix_acl_alloc\|posix_acl_dup\)(...)) == NULL) S
)
  ... when != E2 = E
      when strict
(
  posix_acl_release(E);
|
  E1 = E;
|
+ posix_acl_release(E);
  return;
|
+ posix_acl_release(E);
  return ret;
)
  ...+>
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: KaiGai Kohei <kaigai@ak.jp.nec.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-01-08 07:48:58 +00:00
Rafael J. Wysocki e136e769d4 Freezer: Fix JFFS2 garbage collector freezing issue (rev. 2)
Fix breakage caused by commit d5d8c5976d
"freezer: do not send signals to kernel threads" in
jffs2_garbage_collect_thread() that assumed it would be sent signals
by the freezer.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Pete MacKay <armlinux@architechnical.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2007-12-04 01:35:41 -05:00
Alexey Korolev c2056e1e1d [JFFS2] Fix return value check for mtd->point() in check_node_data()
If we ask it to map 'len' bytes of the device, don't compare against 
some other number and whine that it's different. That's a little silly.

Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-11-28 11:54:55 +00:00
David Woodhouse 92525726df [JFFS2] Fix data CRC checking on NOR flash.
We were failing to check the data CRC on data nodes on non-writebuffered
flash, which led to "interesting" behaviour on unclean shutdowns.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-11-21 12:08:16 -05:00
Adrian Bunk 050416e933 [JFFS2] make jffs2_get_acl() static
jffs2_get_acl() can now become static again.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: KaiGai Kohei <kaigai@ak.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-11-06 08:36:49 +00:00
David Woodhouse 6d88202e39 [JFFS2] Fix misapplied patch causing compile breakage
Somehow, the patch in commit 15953580e7
was misapplied and part of the old list-traversal remained. Remove it.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-11-06 08:29:59 +00:00
David Woodhouse 857013b87b [JFFS2] Don't strip sgid bit from inode permissions
<viro> dwmw2: anyway, removing sgid from directories or from
       files without S_IXGRP is a plain and simple bug
<viro> these days you don't need that logics at all - simply remove it

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-11-01 16:27:38 -04:00
David Woodhouse 15953580e7 [JFFS2] Improve getdents vs. f_pos handling on NOR flash.
Commit a491486a20 started obliterating
dirents directly on the medium, when jffs2_can_mark_obsolete(). Removing
them immediately from the f->dents list, however, screws up handling of
f_pos within a directory -- because the offset is equivalent to the
number of entries through the list we are, and the existence of
deletion dirents served to provide 'placeholders' for unlinked
entries. Now, 'rm -r' doesn't even manage to unlink everything in the
directory.

Revert to keeping 'deletion' dirents in the list, at least in memory
even though we no longer write anything to the medium.

Spotted, debugged and mostly fixed by Joakim Tjernlund

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-11-01 16:25:56 -04:00
David Woodhouse 8d6ea587d9 [JFFS2] Prevent return of initialised variable in jffs2_init_acl_post()
Spotted by the Coverity checker, and pointed out by Adrian Bunk.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-10-27 10:36:44 -04:00
Nick Piggin 2a754b51aa [JFFS2] Fix return value from jffs2_write_end()
jffs2_write_end() is sometimes passing back a "written" length greater 
than the length we passed into it, leading to a BUG at mm/filemap.c:1749 
when used with unionfs.

It happens because we actually write more than was requested, to reduce 
log fragmentation. These "longer" writes are fine, but they shouldn't 
get propagated back to the vm/vfs.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-10-22 10:24:44 +01:00
KaiGai Kohei cfc8dc6f6f [JFFS2] Tidy up fix for ACL/permissions problem.
[In commit 9ed437c50d we fixed a problem 
with standard permissions on newly-created inodes, when POSIX ACLs are 
enabled. This cleans it up...]

The attached patch separate jffs2_init_acl() into two parts.

The one is jffs2_init_acl_pre() called from jffs2_new_inode().
It compute ACL oriented inode->i_mode bits, and allocate in-memory ACL
objects associated with the new inode just before when inode meta
infomation is written to the medium.

The other is jffs2_init_acl_post() called from jffs2_symlink(),
jffs2_mkdir(), jffs2_mknod() and jffs2_do_create().
It actually writes in-memory ACL objects into the medium next to
the success of writing meta-information.

In the current implementation, we have to write a same inode meta
infomation twice when inode->i_mode is updated by the default ACL.
However, we can avoid the behavior by putting an updated i_mode
before it is written at first, as jffs2_init_acl_pre() doing.

Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-10-20 14:10:54 +01:00
Pavel Emelyanov ba25f9dcc4 Use helpers to obtain task pid in printks
The task_struct->pid member is going to be deprecated, so start
using the helpers (task_pid_nr/task_pid_vnr/task_pid_nr_ns) in
the kernel.

The first thing to start with is the pid, printed to dmesg - in
this case we may safely use task_pid_nr(). Besides, printks produce
more (much more) than a half of all the explicit pid usage.

[akpm@linux-foundation.org: git-drm went and changed lots of stuff]
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Dave Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 11:53:43 -07:00
Christoph Lameter 4ba9b9d0ba Slab API: remove useless ctor parameter and reorder parameters
Slab constructors currently have a flags parameter that is never used.  And
the order of the arguments is opposite to other slab functions.  The object
pointer is placed before the kmem_cache pointer.

Convert

        ctor(void *object, struct kmem_cache *s, unsigned long flags)

to

        ctor(struct kmem_cache *s, void *object)

throughout the kernel

[akpm@linux-foundation.org: coupla fixes]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:45 -07:00
Nick Piggin 205c109a7a jffs2: convert to new aops
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16 09:42:57 -07:00
David Woodhouse b160292cc2 Merge Linux 2.6.23 2007-10-13 14:43:54 +01:00
David Woodhouse 4fc8a60786 [JFFS2] Remove stray debugging printk
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-10-13 14:29:39 +01:00
David Woodhouse b534e70cf5 [JFFS2] Handle dirents on the flash with embedded zero bytes in names.
In three places: summary scan, normal scan, REF_PRISTINE GC.

Just truncate at the NUL, since that was the correct thing to do in the
only case where this (inexplicable) breakage has been seen.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-10-13 11:35:58 +01:00
David Woodhouse 69ca4378aa [JFFS2] Check for creation of dirents with embedded zero bytes in name.
I have no idea how this happened, but OLPC trac #4184 suggests that it
did. Catch it early.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-10-13 11:33:50 +01:00
David Woodhouse a8c68f3264 [JFFS2] Don't count all 'very dirty' blocks except in debug mode
... where we'll actually print the count in a debug message.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-10-13 11:32:16 +01:00
David Woodhouse 2665ea842d [JFFS2] Check whether garbage-collection actually obsoleted its victim.
In OLPC trac #4184 we found a case where a corrupted node didn't
actually get obsoleted when we tried to garbage-collect it. So we wrote
out many million copies of it, in repeated attempts to obsolete it,
until the flash became full. Don't Do That.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-10-13 11:31:23 +01:00
David Woodhouse 85becc535b [JFFS2] Relax threshold for triggering GC due to dirty blocks.
Instead of matching resv_blocks_gcmerge, which is only about 3, instead
match resv_blocks_gctrigger, which includes a proportion of the total
device size.

These ought to become tunable from userspace, at some point.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-10-13 11:29:07 +01:00
David Woodhouse 8fb870df5a [JFFS2] Trigger garbage collection when very_dirty_list size becomes excessive
With huge amounts of free space, we weren't bothering to GC for while a
while, and pathological numbers of obsolete nodes were accumulating,
seriously affecting performance on NAND flash (OLPC trac #3978)

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-10-06 15:12:58 -04:00
Andy Lowe 59d8235be2 [JFFS2] Fix unpoint length
Fix a couple of instances in JFFS2 where the unpoint() routine is
being called with the wrong length in cases where the point() routine
truncated a request.

Signed-off-by: Andy Lowe <alowe@mvista.com>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-09-23 18:41:17 +01:00
Jason Lunz fc0e01974c [JFFS2] fix write deadlock regression
I've bisected the deadlock when many small appends are done on jffs2 down to
this commit:

commit 6fe6900e1e
Author: Nick Piggin <npiggin@suse.de>
Date:   Sun May 6 14:49:04 2007 -0700

    mm: make read_cache_page synchronous

    Ensure pages are uptodate after returning from read_cache_page, which allows
    us to cut out most of the filesystem-internal PageUptodate calls.

    I didn't have a great look down the call chains, but this appears to fixes 7
    possible use-before uptodate in hfs, 2 in hfsplus, 1 in jfs, a few in
    ecryptfs, 1 in jffs2, and a possible cleared data overwritten with readpage in
    block2mtd.  All depending on whether the filler is async and/or can return
    with a !uptodate page.

It introduced a wait to read_cache_page, as well as a
read_cache_page_async function equivalent to the old read_cache_page
without any callers.

Switching jffs2_gc_fetch_page to read_cache_page_async for the old
behavior makes the deadlocks go away, but maybe reintroduces the
use-before-uptodate problem? I don't understand the mm/fs interaction
well enough to say.

[It's fine. dwmw2.]

Signed-off-by: Jason Lunz <lunz@falooley.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-09-02 18:18:38 +01:00
David Woodhouse ac0c955d50 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2007-08-23 10:43:14 +01:00
Andrew Morton f4e35647f5 [JFFS2] fix printk warning in jffs2_block_check_erase()
fs/jffs2/erase.c: In function 'jffs2_block_check_erase':
fs/jffs2/erase.c:355: warning: format '%08x' expects type 'unsigned int', but argument 3 has type 'long unsigned int'

and

fs/jffs2/erase.c: In function 'jffs2_erase_pending_blocks':
fs/jffs2/erase.c:404: warning: 'bad_offset' may be used uninitialized in this function

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-08-22 12:41:48 +01:00
David Woodhouse 9ed437c50d [JFFS2] Fix ACL vs. mode handling.
When POSIX ACL support was enabled, we weren't writing correct
legacy modes to the medium on inode creation, or when the ACL was set.
This meant that the permissions would be incorrect after the file system
was remounted.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-08-22 12:39:19 +01:00
David Woodhouse b574864333 JFFS2 locking regression fix.
Commit a491486a20 introduced a locking
problem in JFFS2 -- we up() the alloc_sem when we weren't previously
holding it. This leads to all kinds of fun behaviour later.

There was a _reason_ for the
	if (1 /* alternative path needs testing */ ||
which the above-mentioned commit removed :)

Discovered and debugged by Giulio Fedel <giulio.fedel@andorsystems.com>

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-20 22:44:27 -07:00
David Woodhouse 09b3fba562 [JFFS2] Correct cleanmarker checks -- we should use only 8 bytes
Commit a7a6ace140 revamped the OOB
handling but accidentally switched to 12-byte cleanmarkers, which is
incompatible with what 'flash_eraseall -j' will do. So using
flash_eraseall -j and then trying to mount the 'empty' flash will fail,
because the cleanmarkers aren't recognised.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-08-09 17:28:20 +08:00
David Woodhouse b8e3ec30c2 [JFFS2] Print correct node offset when complaining about broken data CRC
Debugging the hardware problems in OLPC trac #1905 would be a whole lot
easier if the correct node offsets were printed for the offending nodes.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-08-02 21:43:46 +01:00
David Woodhouse 7b687707d7 [JFFS2] Fix suspend failure with JFFS2 GC thread.
The try_to_freeze() call was in the wrong place; we need it in the
signal-pending loop now that a pending freeze also makes
signal_pending() return true.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-08-02 21:43:03 +01:00
David Woodhouse 71c2339775 [JFFS2] Deletion dirents should be REF_NORMAL, not REF_PRISTINE.
Otherwise they'll never actually get garbage-collected.
Noted by Jonathan Larmour.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-08-02 21:39:50 +01:00
Joakim Tjernlund 5bd5c03c31 [JFFS2] Prevent oops after 'node added in wrong place' debug check
jffs2_add_physical_node_ref() should never really return error -- it's
an internal debugging check which triggered. We really need to work out
why and stop it happening. But in the meantime, let's make the failure
mode a little less nasty.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-08-02 21:36:35 +01:00
David Woodhouse 39fe5434cb Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2007-07-23 10:20:10 +01:00
Paul Mundt 20c2df83d2 mm: Remove slab destructors from kmem_cache_create().
Slab destructors were no longer supported after Christoph's
c59def9f22 change. They've been
BUGs for both slab and slub, and slob never supported them
either.

This rips out support for the dtor pointer from kmem_cache_create()
completely and fixes up every single callsite in the kernel (there were
about 224, not including the slab allocator definitions themselves,
or the documentation references).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 10:11:58 +09:00
Satyam Sharma 3bd858ab1c Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid check
Introduce is_owner_or_cap() macro in fs.h, and convert over relevant
users to it. This is done because we want to avoid bugs in the future
where we check for only effective fsuid of the current task against a
file's owning uid, without simultaneously checking for CAP_FOWNER as
well, thus violating its semantics.
[ XFS uses special macros and structures, and in general looked ...
untouchable, so we leave it alone -- but it has been looked over. ]

The (current->fsuid != inode->i_uid) check in generic_permission() and
exec_permission_lite() is left alone, because those operations are
covered by CAP_DAC_OVERRIDE and CAP_DAC_READ_SEARCH. Similarly operations
falling under the purview of CAP_CHOWN and CAP_LEASE are also left alone.

Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in>
Cc: Al Viro <viro@ftp.linux.org.uk>
Acked-by: Serge E. Hallyn <serge@hallyn.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 12:00:03 -07:00
Rafael J. Wysocki 8314418629 Freezer: make kernel threads nonfreezable by default
Currently, the freezer treats all tasks as freezable, except for the kernel
threads that explicitly set the PF_NOFREEZE flag for themselves.  This
approach is problematic, since it requires every kernel thread to either
set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't
care for the freezing of tasks at all.

It seems better to only require the kernel threads that want to or need to
be frozen to use some freezer-related code and to remove any
freezer-related code from the other (nonfreezable) kernel threads, which is
done in this patch.

The patch causes all kernel threads to be nonfreezable by default (ie.  to
have PF_NOFREEZE set by default) and introduces the set_freezable()
function that should be called by the freezable kernel threads in order to
unset PF_NOFREEZE.  It also makes all of the currently freezable kernel
threads call set_freezable(), so it shouldn't cause any (intentional)
change of behaviour to appear.  Additionally, it updates documentation to
describe the freezing of tasks more accurately.

[akpm@linux-foundation.org: build fixes]
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:02 -07:00
David Woodhouse 0fc72b81d3 [JFFS2] Add declaration of jffs2_lzo_{init,exit} to compr.h
fs/jffs2/compr.c: In function ‘jffs2_compressors_init’:
fs/jffs2/compr.c:320: warning: implicit declaration of function ‘jffs2_lzo_init’
fs/jffs2/compr.c: In function ‘jffs2_compressors_exit’:
fs/jffs2/compr.c:346: warning: implicit declaration of function ‘jffs2_lzo_exit’

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-07-11 15:33:14 +01:00
Richard Purdie 3b23c1f5fa [JFFS2] Add a "favourlzo" compression mode
Add a "favourlzo" compression mode to jffs2 which tries to
optimise by size but gives lzo an advantage when comparing sizes.
This means the faster lzo algorithm can be preferred when there
isn't much difference in compressed size (the exact threshold can
be changed).

Signed-off-by: Richard Purdie <rpurdie@openedhand.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-07-11 15:04:38 +01:00
Richard Purdie c799aca31b [JFFS2] Add LZO compression support.
Add LZO1X compression/decompression support to jffs2.

LZO's interface doesn't entirely match that required by jffs2 so a
buffer and memcpy is unavoidable.

Signed-off-by: Richard Purdie <rpurdie@openedhand.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-07-11 15:03:53 +01:00
David Woodhouse db1b39d8b8 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2007-07-11 14:55:48 +01:00
David Woodhouse a6bc432e29 [JFFS2] Add support for write-buffer verification.
We've seen some evil corruption issues, where the corruption seems to be
introduced after the JFFS2 crc32 is calculated but before the NAND
controller calculates the ECC. So it's in RAM or in the PCI DMA
transfer; not on the flash. Attempt to catch it earlier by (optionally)
reading back from the flash immediately after writing it.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-07-11 14:23:54 +01:00
David Woodhouse ef53cb02ff [JFFS2] Whitespace cleanups.
Convert many spaces to tabs; one or two other minor cosmetic fixes.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-07-10 10:01:22 +01:00
Jens Axboe 5ffc4ef45b sendfile: remove .sendfile from filesystems that use generic_file_sendfile()
They can use generic_file_splice_read() instead. Since sys_sendfile() now
prefers that, there should be no change in behaviour.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-10 08:04:13 +02:00
David Woodhouse b2e25235fe [JFFS2] Print correct node offset when complaining about broken data CRC
Debugging the hardware problems in OLPC trac #1905 would be a whole lot
easier if the correct node offsets were printed for the offending nodes.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-07-05 01:57:26 -04:00
David Woodhouse e2baf4ed16 [JFFS2] Fix readinode failure when read_dnode() detects CRC failure.
We should have stopped returning 1 from read_dnode() to indicate
failure. We can just mark the damn thing obsolete immediately. But I
missed a case where we don't.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-07-04 10:24:29 -04:00
David Woodhouse 14c6381ee4 [JFFS2] Fix readinode failure when read_dnode() detects CRC failure.
We should have stopped returning 1 from read_dnode() to indicate
failure. We can just mark the damn thing obsolete immediately. But I
missed a case where we don't.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-07-03 16:51:19 -04:00
David Woodhouse 43dfa07fbb [JFFS2] Deletion dirents should be REF_NORMAL, not REF_PRISTINE.
Otherwise they'll never actually get garbage-collected.
Noted by Jonathan Larmour.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-06-29 13:39:57 +01:00
David Woodhouse e716dd3644 [JFFS2] Fix suspend failure with JFFS2 GC thread.
The try_to_freeze() call was in the wrong place; we need it in the
signal-pending loop now that a pending freeze also makes
signal_pending() return true.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-06-28 19:49:36 +01:00
David Woodhouse 66bfaeaa90 [JFFS2] Improve diagnostic output for 'node added in wrong place' check
Jocke has seen this fail. We want to know why.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-06-28 19:03:11 +01:00
Joakim Tjernlund d364fb18cd [JFFS2] Reduce time for which erase_free_sem is held during erase.
With current desing erase_free_sem is locked every time the flash
block is being erased. For NOR flashes - ~1 second is needed to erase
single flash block. In the worst case scenario erase_free_sem may be
locked for a couple of seconds when the number of blocks is being
erased (e.g. after large file was removed). When erase_free_sem is
locked all read/write operations for given JFFS2 partition are locked
too - in effect from time to time access to the JFFS2 partition is
locked for a number of seconds. This fix makes critical section in
flash erasing procedure shorter - now erase_free_sem is locked around
erase_completion_lock spinlock only.

Originally from Radoslaw Bisewski
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-06-28 19:02:15 +01:00
Joakim Tjernlund f79c44980a [JFFS2] Prevent oops after 'node added in wrong place' debug check
jffs2_add_physical_node_ref() should never really return error -- it's
an internal debugging check which triggered. We really need to work out
why and stop it happening. But in the meantime, let's make the failure
mode a little less nasty.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-06-28 18:55:27 +01:00
Joakim Tjernlund fab2c39912 [JFFS2] Use point(), if available, to check newly erased blocks.
Faster and won't trash the D-cache.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-06-28 18:41:22 +01:00
Joakim Tjernlund fd5324909e [JFFS2] Fix hanging close for /dev/mtd character device.
When pdflush is erasing lots of sectors, drivers calling
mtd->sync will hang until all blocks are erased. Be nicer.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-06-28 18:37:48 +01:00
Linus Torvalds ec4883b015 Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6:
  [JFFS2] Fix obsoletion of metadata nodes in jffs2_add_tn_to_tree()
  [MTD] Fix error checking after get_mtd_device() in get_sb_mtd functions
  [JFFS2] Fix buffer length calculations in jffs2_get_inode_nodes()
  [JFFS2] Fix potential memory leak of dead xattrs on unmount.
  [JFFS2] Fix BUG() caused by failing to discard xattrs on deleted files.
  [MTD] generalise the handling of MTD-specific superblocks
  [MTD] [MAPS] don't force uclinux mtd map to be root dev
2007-06-04 17:54:09 -07:00
David Woodhouse 0477d24e2a [JFFS2] Fix obsoletion of metadata nodes in jffs2_add_tn_to_tree()
We should keep the mdata node with higher version number, not just the
one we happen to find latest. Doh.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-06-01 20:04:43 +01:00
Artem Bityutskiy ea55d30798 [JFFS2] Fix buffer length calculations in jffs2_get_inode_nodes()
If we have already read enough bytes, no need to call read_more().

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-06-01 13:20:29 +01:00
David Woodhouse 2ad8ee7135 [JFFS2] Fix potential memory leak of dead xattrs on unmount.
An xattr_datum which ends up orphaned should be freed by the GC 
thread. But if we umount before the GC thread is finished, or if we 
mount read-only and the GC thread never runs, they might never be 
freed. Clean them up during unmount, if there are any left.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-05-20 11:30:38 -04:00
David Woodhouse 8ae5d31263 [JFFS2] Fix BUG() caused by failing to discard xattrs on deleted files.
When we cannot mark nodes as obsolete, such as on NAND flash, we end up 
having to delete inodes with !nlink in jffs2_build_remove_unlinked_inode().
However, jffs2_build_xattr_subsystem() runs later than this, and will
attach an xref to the dead inode. Then later when the last nodes of that
dead inode are erased we hit a BUG() in jffs2_del_ino_cache() 
because we're not supposed to get there with an xattr still attached to 
the inode which is being killed.

The simple fix is to refrain from attaching xattrs to inodes with zero 
nlink, in jffs2_build_xattr_subsystem(). It's it's OK to trust nlink 
here because the file system isn't actually mounted yet, so there's no 
chance that a zero-nlink file could actually be alive still because 
it's open.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-05-20 11:28:22 -04:00
Christoph Lameter a35afb830f Remove SLAB_CTOR_CONSTRUCTOR
SLAB_CTOR_CONSTRUCTOR is always specified. No point in checking it.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Steven French <sfrench@us.ibm.com>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Dave Kleikamp <shaggy@austin.ibm.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Anton Altaparmakov <aia21@cantab.net>
Cc: Mark Fasheh <mark.fasheh@oracle.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@ucw.cz>
Cc: David Chinner <dgc@sgi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-17 05:23:04 -07:00
David Howells acaebfd8a7 [MTD] generalise the handling of MTD-specific superblocks
Generalise the handling of MTD-specific superblocks so that JFFS2 and ROMFS
can both share it.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-05-11 12:14:15 +01:00
Linus Torvalds ba7cc09c9c Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (21 commits)
  [MTD] [CHIPS] Remove MTD_OBSOLETE_CHIPS (jedec, amd_flash, sharp)
  [MTD] Delete allegedly obsolete "bank_size" field of mtd_info.
  [MTD] Remove unnecessary user space check from mtd.h.
  [MTD] [MAPS] Remove flash maps for no longer supported 405LP boards
  [MTD] [MAPS] Fix missing printk() parameter in physmap_of.c MTD driver
  [MTD] [NAND] platform NAND driver: add driver
  [MTD] [NAND] platform NAND driver: update header
  [JFFS2] Simplify and clean up jffs2_add_tn_to_tree() some more.
  [JFFS2] Remove another bogus optimisation in jffs2_add_tn_to_tree()
  [JFFS2] Remove broken insert_point optimisation in jffs2_add_tn_to_tree()
  [JFFS2] Remember to calculate overlap on nodes which replace older nodes
  [JFFS2] Don't advance c->wbuf_ofs to next eraseblock after wbuf flush
  [MTD] [NAND] at91_nand.c: CMDLINE_PARTS support
  [MTD] [NAND] Tidy up handling of page number in nand_block_bad()
  [MTD] block2mtd_paramline[] mustn't be __initdata
  [MTD] [NAND] Support multiple chips in CAFÉ driver
  [MTD] [NAND] Rename cafe.c to cafe_nand.c and remove the multi-obj magic
  [MTD] [NAND] Use rslib for CAFÉ ECC
  [RSLIB] Support non-canonical GF representations
  [JFFS2] Remove dead file histo_mips.h
  ...
2007-05-09 13:10:11 -07:00
David Woodhouse 1c97964520 [JFFS2] Simplify and clean up jffs2_add_tn_to_tree() some more.
Fixing at least a couple more bugs in the process.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-05-08 00:19:54 +01:00
Christoph Lameter 50953fe9e0 slab allocators: Remove SLAB_DEBUG_INITIAL flag
I have never seen a use of SLAB_DEBUG_INITIAL.  It is only supported by
SLAB.

I think its purpose was to have a callback after an object has been freed
to verify that the state is the constructor state again?  The callback is
performed before each freeing of an object.

I would think that it is much easier to check the object state manually
before the free.  That also places the check near the code object
manipulation of the object.

Also the SLAB_DEBUG_INITIAL callback is only performed if the kernel was
compiled with SLAB debugging on.  If there would be code in a constructor
handling SLAB_DEBUG_INITIAL then it would have to be conditional on
SLAB_DEBUG otherwise it would just be dead code.  But there is no such code
in the kernel.  I think SLUB_DEBUG_INITIAL is too problematic to make real
use of, difficult to understand and there are easier ways to accomplish the
same effect (i.e.  add debug code before kfree).

There is a related flag SLAB_CTOR_VERIFY that is frequently checked to be
clear in fs inode caches.  Remove the pointless checks (they would even be
pointless without removeal of SLAB_DEBUG_INITIAL) from the fs constructors.

This is the last slab flag that SLUB did not support.  Remove the check for
unimplemented flags from SLUB.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-07 12:12:57 -07:00
David Woodhouse fcf3cafb3e [JFFS2] Remove another bogus optimisation in jffs2_add_tn_to_tree()
We attempted to insert new nodes into the tree by just using
rb_replace_node to let them replace an earlier node which they
completely overlapped. However, that could place the new node into the
wrong place in the tree, since its start could be node only before the
start of the victim, but before the node _before_ the victim in the tree
(if that previous node actually ends _after_ the new node, thus isn't
entirely overlapped and wasn't itself chosen to be the victim).

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-05-07 13:16:13 +01:00
David Woodhouse 96dd8d25d1 [JFFS2] Remove broken insert_point optimisation in jffs2_add_tn_to_tree()
The original code would remember, during the first pass over the tree,
a suitable place to start the insertion from when we eventually come
to add a new node.

The optimisation was broken, and we sometimes ended up inserting a new
node in the wrong place because we started the insertion from the wrong
point.

Just ditch the optimisation and start the insertion from the root of the
tree, for now. I'll try it again when I'm feeling cleverer.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-05-06 14:41:40 +01:00
David Woodhouse 1123e2a859 [JFFS2] Remember to calculate overlap on nodes which replace older nodes
This fixes a problem Artem found with the integck test tool -- we
weren't correctly keeping track of the 'overlap' flag in some cases,
which led to the nodes being played back in an incorrect order and file
corruption.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-05-05 16:29:34 +01:00
David Woodhouse 3fddb6c985 [JFFS2] Don't advance c->wbuf_ofs to next eraseblock after wbuf flush
After flushing the last page of an eraseblock, don't leave the
wbuf 'offset' field pointing at the start of the next physical
eraseblock. This was causing a BUG() on NOR-ECC (Sibley) flash, where
we start writing a little further in, after the cleanmarker.

Debugged by Alexander Belyakov <abelyako@googlemail.com>

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-05-05 09:52:49 +01:00
David Woodhouse 7c96b7a146 [JFFS2] Remove dead file histo_mips.h
Its contents were subsumed into compr_rubin.c in a previous
commit, but I forgot to git-rm it.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-05-02 08:36:21 +01:00
David Woodhouse d1da4e50e5 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:

	drivers/mtd/Kconfig

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-27 19:16:19 +01:00
Artem Bityutskiy 0029da3bf4 JFFS2: add UBI support
This patch make JFFS2 able to work with UBI volumes via the emulated MTD
devices which are directly mapped to these volumes.

Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
2007-04-27 14:24:08 +03:00
Andrew Morton f6449f4ece [JFFS2] Fix compr_rubin.c build after include file elimination.
It seems to be silly season lately.

(Oops, test builds are more useful if the file in question is actually
configured on. dwmw2).

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-26 07:27:04 +01:00
David Woodhouse 61c4b23770 [JFFS2] Handle inodes with only a single metadata node with non-zero isize
This should never happen unless there's corruption on the medium and the
actual data nodes go missing. But the failure mode (an oops when we assume
the fragtree isn't empty and go looking for its last node) isn't useful.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-25 17:04:23 +01:00
David Woodhouse c00c310eac [JFFS2] Tidy up licensing/copyright boilerplate.
In particular, remove the bit in the LICENCE file about contacting
Red Hat for alternative arrangements. Their errant IS department broke
that arrangement a long time ago -- the policy of collecting copyright
assignments from contributors came to an end when the plug was pulled on
the servers hosting the project, without notice or reason.

We do still dual-license it for use with eCos, with the GPL+exception
licence approved by the FSF as being GPL-compatible. It's just that nobody
has the right to license it differently.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-25 14:16:47 +01:00
Joakim Tjernlund 0dec4c8bc6 [JFFS2] Better fix for all-zero node headers
No need to check for all-zero header since the header cannot
be zero due to other checks.

Replace the all-zero header check in readinode.c with a
check for the magic word.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-25 04:13:06 +01:00
David Woodhouse df8e96f391 [JFFS2] Improve read_inode memory usage, v2.
We originally used to read every node and allocate a jffs2_tmp_dnode_info
structure for each, before processing them in (reverse) version order
and discarding the ones which are obsoleted by later nodes.

With huge logfiles, this behaviour caused memory problems. For example, a
file involved in OLPC trac #1292 has 1822391 nodes, and would cause the XO
machine to run out of memory during the first stage of read_inode().

Instead of just inserting nodes into a tree in version order as we find
them, we now put them into a tree in order of their offset within the
file, which allows us to immediately discard nodes which are completely
obsoleted.

We don't use a full tree with 'fragments' pointing to the real data
structure, as we do in the normal fragtree. We sort only on the start
address, and add an 'overlapped' flag to the tmp_dnode_info to indicate
that the node in question is (partially) overlapped by another.

When the scan is complete, we start at the end of the file, adding each
node to a real fragtree as before. Where the node is non-overlapped, we
just add it (it doesn't matter that it's not the latest version; there is
no overlap). When the node at the end of the tree _is_ overlapped, we sort
it and all its overlapping nodes into version order and then add them to
the fragtree in that order.

This 'early discard' reduces the peak allocation of tmp_dnode_info
structures from 1.8M to a mere 62872 (3.5%) in the degenerate case
referenced above.

This version of the patch also correctly rememembers the highest node
version# seen for an inode when it's scanned.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-25 03:23:42 +01:00
David Woodhouse 44b998e1eb [JFFS2] Improve failure mode if inode checking leaves unchecked space.
We should never find the unchecked size is non-zero after we've finished
checking all inodes. If it happens, used to BUG(), leaving the alloc_sem
held and deadlocking. Instead, just return -ENOSPC after complaining. The
GC thread will die, but read-only operation should be able to continue and
the file system should be unmountable.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-23 12:11:46 +01:00
David Woodhouse 566865a2a4 [JFFS2] Fix cross-endian build.
When compiling a LE-capable JFFS2 on PowerPC, wbuf.c fails to compile:

fs/jffs2/wbuf.c:973: error: braced-group within expression allowed only inside a function
fs/jffs2/wbuf.c:973: error: initializer element is not constant
fs/jffs2/wbuf.c:973: error: (near initialization for ‘oob_cleanmarker.magic’)
fs/jffs2/wbuf.c:974: error: braced-group within expression allowed only inside a function
fs/jffs2/wbuf.c:974: error: initializer element is not constant
fs/jffs2/wbuf.c:974: error: (near initialization for ‘oob_cleanmarker.nodetype’)
fs/jffs2/wbuf.c:975: error: braced-group within expression allowed only inside a function
fs/jffs2/wbuf.c:976: error: initializer element is not constant
fs/jffs2/wbuf.c:976: error: (near initialization for ‘oob_cleanmarker.totlen’)

Provide constant_cpu_to_je{16,32} functions, and use them for initialising the
offending structure.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-23 12:07:17 +01:00
Joakim Tjernlund a491486a20 [JFFS2] Obsolete dirent nodes immediately on unlink, where possible.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-20 23:09:28 -04:00
Joakim Tjernlund c2aecda79c [JFFS2] Speed up mount for directly-mapped NOR flash
Remove excessive scanning of empty flash after a clean
marker for users of the point/unpoint method. cfi_cmdset_0001
uses point/unpoint by default iff flash mapping is linear.
The speedup is several orders of magnitude if FS is less than
half full.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-17 14:07:34 -04:00
Artem Bityutskiy 10731f8300 [JFFS2] fix buffer sise calculations in jffs2_get_inode_nodes()
In read inode we have an optimization which prevents one
min. I/O unit (e.g. NAND page) to be read more then once.

Namely, at the beginning we do not know which node type we read,
so we read so we assume we read the directory entry, because it
has the smallest node header. When we read it, we read up to the
next min. I/O unit, just because if later we'll need to read more,
we already have this data.

If it turns out to be that the node is not directory entry, and
we need more data, and we did not read it because it sits in the
next min. I/O unit, we read the whole next (or several next)
min. I/O unit(s). And if it happens to be that we read a data node,
and we've read part of its data, we calculate partial CRC.
So if later we need to check data CRC, we'll only read the rest
of the data from further min. I/O units and continue CRC checking.

This code was a bit messy and buggy. The bug was that it assumed
relatively large min. I/O unit, so that the largest node header
could overlap only one min. I/O unit boundary.

This parch clean-ups the code a bit and fixes this bug.
The patch was not tested on flash with small min. I/O unit, like
NOR-ECC, nut it was tested on NAND with 512 bytes NAND page, so
it at least does not break NAND. It was also tested with mtdram
so it should not break NOR.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-17 14:05:48 -04:00
Adrian Hunter 7f762ab24c [JFFS2] Disable summary after wbuf recovery
After a write error, any data in the write buffer must
be relocated.  This is handled by the jffs2_wbuf_recover
function.  This function does not fix up the erase block
summary information that is collected for writing at the
end of the block, which results in an incorrect summary
(or BUG if the summary was found to be empty).

As the summary is not essential (it is an optimisation),
it may be disabled for the current erase block when this
situation arises.  This patch does that.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-17 13:56:44 -04:00
Adrian Hunter 99c2594f0e [JFFS2] Prevent list corruption when handling write errors
If a write error occurs, the affected block is placed on the
bad_used_list.  In the case that the write error occured
when writing summary data the block was also being placed on
the dirty_list, which caused list corruption and ultimately
a soft lockup in jffs2_mark_node_obsolete. This fixes that.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-17 13:56:23 -04:00
Artem Bityutskiy b0afbbec49 [JFFS2] fix deadlock on error path
When the MTD driver returns write failure, the following deadlock
occurs:

We are in __jffs2_flush_wbuf(), we hold &c->wbuf_sem. Write failure.
jffs2_wbuf_recover()->jffs2_reserve_space_gc()->jffs2_do_reserve_space()
->jffs2_erase_pending_blocks()->jffs2_flash_read()

and it tries to lock &c->wbuf_sem again. Deadlock.

Reported-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-17 13:53:51 -04:00
Thomas Gleixner 53043002ef [JFFS2] check node crc before doing anything else
Check the node CRC on scan before doing anything else with the node.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-17 18:26:18 +01:00
Robert P. J. Day 8dc64fca75 [JFFS2] Delete everything related to obsolete JFFS2_PROC option
Delete everything related to the apparently non-existent kernel config
option JFFS2_PROC.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-02 14:11:25 -04:00
Robert P. J. Day 3a6effe81f [JFFS2] Remove superfluous source file fs/jffs2/comprtest.c
Delete the obsolete source file fs/jffs2/comprtest.c.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-03-10 10:16:36 +01:00
Artem Bityutskiy 0feba829ee [JFFS2] print a message when marking bad block
New bad eraseblock is an event which is important enough to be printed
about.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-03-09 12:29:39 +00:00
David Woodhouse c7258a4477 [JFFS2] Check for all-zero node headers
Due to a poor choice of CRC32 seed, a node header which is all zeroes
would pass the CRC32 check. Explicitly check for this case, and treat it
as we do a CRC failure.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-03-09 11:44:00 +00:00
David Woodhouse f8a922c7bb [JFFS2] Use yield() between GC passes in background thread.
The garbage collection thread is strictly an optimisation. Everything it
does would also be done just-in-time in the context of something in
userspace trying to access the file system.

Sometimes, however, it's a pessimisation. Especially during early boot
when it's checksumming nodes and scanning inodes which are shortly going
to be pulled in by read_inode anyway. We end up building the rbtree of
node coverage twice for the same inode.

By switching to yield() instead of cond_resched() in the main loop, we
observe boot times on the OLPC system going down from about 100 seconds to
60.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-03-08 10:28:30 +00:00
Vitaly Wool 180bfb31fe [JFFS2] Fix writebuffer recovery in the first page of a block
For the case when nand_write_page fail with -EIO for the first page in an
eraseblock, jffs2_wbuf_recover ends up producing a BUG in jffs2_block_refile
as jeb->first_node is not yet set up (it's set up later in jffs2_wbuf_recover).
This BUG is not really a bug; it's just jffs2_wbuf_recover calling
jffs2_block_refile with the wrong second parameter.
This patch takes care of this situation.

Signed-off-by: Vitaly Wool <vwool@ru.mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-03-08 09:18:31 +00:00
Linus Torvalds 4935361766 Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (49 commits)
  [MTD] [NAND] S3C2412 fix hw ecc
  [MTD] [NAND] Work around false compiler warning in CAFÉ driver
  [JFFS2] printk warning fixes
  [MTD] [MAPS] ichxrom warning fix
  [MTD] [MAPS] amd76xrom warning fix
  [MTD] [MAPS] esb2rom warning fixes
  [MTD] [MAPS] ck804xrom warning fix
  [MTD] [MAPS] netsc520 warning fix
  [MTD] [MAPS] sc520cdp warning fix
  [MTD] [ONENAND] onenand_base warning fix
  [MTD] [NAND] eXcite nand flash driver
  [MTD] Improve heuristic for detecting wrong-endian RedBoot partition table
  [MTD] Fix RedBoot partition parsing regression harder.
  [MTD] [NAND] S3C2410: Hardware ECC correction code
  [JFFS2] Use MTD_OOB_AUTO to automatically place cleanmarker on NAND
  [MTD] Clarify OOB-operation interface comments
  [MTD] remove unused ecctype,eccsize fields from struct mtd_info
  [MTD] [NOR] Intel: remove ugly PROGREGION macros
  [MTD] [NOR] STAA: use writesize instead off eccsize to represent ECC block
  [MTD] OneNAND: Invalidate bufferRAM after erase
  ...
2007-02-19 13:34:11 -08:00
Andrew Morton 7be26bfb2e [JFFS2] printk warning fixes
fs/jffs2/wbuf.c: In function 'jffs2_check_oob_empty':
fs/jffs2/wbuf.c:993: warning: format '%d' expects type 'int', but argument 3 has type 'size_t'
fs/jffs2/wbuf.c:993: warning: format '%d' expects type 'int', but argument 4 has type 'size_t'
fs/jffs2/wbuf.c: In function 'jffs2_check_nand_cleanmarker':
fs/jffs2/wbuf.c:1036: warning: format '%d' expects type 'int', but argument 3 has type 'size_t'
fs/jffs2/wbuf.c:1036: warning: format '%d' expects type 'int', but argument 4 has type 'size_t'
fs/jffs2/wbuf.c: In function 'jffs2_write_nand_cleanmarker':
fs/jffs2/wbuf.c:1062: warning: format '%d' expects type 'int', but argument 3 has type 'size_t'
fs/jffs2/wbuf.c:1062: warning: format '%d' expects type 'int', but argument 4 has type 'size_t'

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-02-18 16:43:14 +00:00
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00
Josef 'Jeff' Sipek ee9b6d61a2 [PATCH] Mark struct super_operations const
This patch is inspired by Arjan's "Patch series to mark struct
file_operations and struct inode_operations const".

Compile tested with gcc & sparse.

Signed-off-by: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12 09:48:47 -08:00
Arjan van de Ven 92e1d5be91 [PATCH] mark struct inode_operations const 2
Many struct inode_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12 09:48:46 -08:00
Artem Bityutskiy a7a6ace140 [JFFS2] Use MTD_OOB_AUTO to automatically place cleanmarker on NAND
Nowadays MTD supports an MTD_OOB_AUTO option which allows users
to access free bytes in NAND's OOB as a contiguous buffer, although
it may be highly discontinuous.

This patch teaches JFFS2 to use this nice feature instead of the
old MTD_OOB_PLACE option. This for example caused problems with
OneNAND. Now JFFS2 does not care how are the free bytes situated.

This may change position of the clean marker on some flashes,
but this is not a problem. JFFS2 will just re-erase the empty
eraseblocks and write the new (correct) clean marker.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-02-09 15:34:08 +00:00
Dmitry Adamushko cfa72397cf JFFS2: memory leak in jffs2_do_mount_fs()
If  jffs2_sum_init()  fails,  c->blocks is not freed neither in
jffs2_do_mount_fs() nor in jffs2_do_fill_super().

Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-02-09 15:00:21 +00:00
David Woodhouse 9cdf083f98 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2007-01-18 10:34:51 +11:00
David Woodhouse e499e01d23 [JFFS2] debug.h: include <linux/sched.h> for current->pid
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-01-13 08:19:03 +08:00
Kyungmin Park abb536e7ac [JFFS2] use the ref_offset macro
Don't use ref->flash_offset directly in debugging code, use the ref_offset macro instead.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
2007-01-10 14:03:20 +02:00