Commit Graph

41 Commits

Author SHA1 Message Date
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 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 ced2207036 [JFFS2] semaphore->mutex conversion
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22 15:13:40 +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
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 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
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
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
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
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
Linus Torvalds 936813a880 Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6:
  [MTD] NAND: Select chip before checking write protect status
  [MTD] CORE mtdchar.c: fix off-by-one error in lseek()
  [MTD] NAND: Fix typo in mtd/nand/ts7250.c
  [JFFS2][XATTR] coexistence between xattr and write buffering support.
  [JFFS2][XATTR] Fix wrong copyright
  [JFFS2][XATTR] Re-define xd->refcnt as atomic_t
  [JFFS2][XATTR] Fix memory leak with jffs2_xattr_ref
  [JFFS2][XATTR] rid unnecessary writing of delete marker.
  [JFFS2][XATTR] Fix ACL bug when updating null xattr by null ACL.
  [JFFS2][XATTR] using 'delete marker' for xdatum/xref deletion
  [MTD] Fix off-by-one error in physmap.c
  [MTD] Remove unused 'nr_banks' variable from ixp2000 map driver
  [MTD NAND] s3c2412 support in s3c2410.c
  [MTD] Initialize 'writesize'
  [MTD] NAND: ndfc fix address offset thinko
  [MTD] NAND: S3C2410 convert prinks to dev_*()s
  [MTD] NAND: Missing fixups
2006-06-27 19:13:56 -07:00
KaiGai Kohei c9f700f840 [JFFS2][XATTR] using 'delete marker' for xdatum/xref deletion
- When xdatum is removed, a new xdatum with 'delete marker' is
  written. (version==0xffffffff means 'delete marker')
- When xref is removed, a new xref with 'delete marker' is written.
  (odd-numbered xseqno means 'delete marker')

- delete_xattr_(datum/xref)_delay() are new deletion functions
  are added. We can only use them if we can detect the target
  obsolete xdatum/xref as a orphan or errir one.
  (e.g when inode deletion, or detecting crc error)

[1/3] jffs2-xattr-v6-01-delete_marker.patch

Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-27 16:16:26 +01:00
Akinobu Mita f116629d03 [PATCH] fs: use list_move()
This patch converts the combination of list_del(A) and list_add(A, B) to
list_move(A, B) under fs/.

Cc: Ian Kent <raven@themaw.net>
Acked-by: Joel Becker <joel.becker@oracle.com>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Cc: Hans Reiser <reiserfs-dev@namesys.com>
Cc: Urban Widmark <urban@teststation.com>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Mark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:18 -07:00
David Woodhouse fc6612f627 [JFFS2] When retiring nextblock, allocate a node_ref for the wasted space
Failing to do so makes the calculated length of the last node incorrect,
when we're not using eraseblock summaries.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-18 18:39:38 +01:00
David Woodhouse 9bfeb691e7 [JFFS2] Switch to using an array of jffs2_raw_node_refs instead of a list.
This allows us to drop another pointer from the struct jffs2_raw_node_ref,
shrinking it to 8 bytes on 32-bit machines (if the TEST_TOTLEN) paranoia
check is turned off, which will be committed soon).

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-26 21:19:05 +01:00
David Woodhouse 046b8b9808 [JFFS2] Add 'jeb' argument to jffs2_prealloc_raw_node_refs()
Preallocation of refs is shortly going to be a per-eraseblock thing,
rather than per-filesystem. Add the required argument to the function.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-25 01:50:35 +01:00
David Woodhouse c38c1b613d [JFFS2] jffs2_free_all_node_refs() doesn't free them all. Rename it.
... to jffs2_free_jeb_node_refs() since that's what it does.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-25 01:38:27 +01:00
David Woodhouse c7c16c8e76 [JFFS2] Revert Artem's Bunkage in debug messages.
Random unthinking 'cleanup' caused debug messages like this:
   Obsoleting node at 0x0006daf4 of len 0x3a4: <7>Dirtying

If messages are continuation of an existing line, they don't need
to be prefixed with KERN_DEBUG.

THINK. Or you will be replaced by a small shell script.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-24 14:24:02 +01:00
David Woodhouse 99988f7bbd [JFFS2] Introduce ref_next() macro for finding next physical node
Another part of the preparation for switching to an array...

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-24 09:04:17 +01:00
David Woodhouse 2f785402f3 [JFFS2] Reduce visibility of raw_node_ref to upper layers of JFFS2 code.
As the first step towards eliminating the ref->next_phys member and saving
memory by using an _array_ of struct jffs2_raw_node_ref per eraseblock,
stop the write functions from allocating their own refs; have them just
_reserve_ the appropriate number instead. Then jffs2_link_node_ref() can
just fill them in.

Use a linked list of pre-allocated refs in the superblock, for now. Once
we switch to an array, it'll just be a case of extending that array.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-24 02:04:45 +01:00
David Woodhouse 9fe4854cd1 [JFFS2] Remove flash offset argument from various functions.
We don't need the upper layers to deal with the physical offset. It's
_always_ c->nextblock->offset + c->sector_size - c->nextblock->free_size
so we might as well just let the actual write functions deal with that.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-23 00:38:06 +01:00
David Woodhouse 0eac940b8a [JFFS2] Add some preemptive BUG checks for XATTR code
In a couple of places, we assume that what's at the end of the
->next_in_ino list is a struct jffs2_inode_cache. Let's check
for that, since we expect it to change soon.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-22 16:29:23 +01:00
David Woodhouse fcb7578719 [JFFS2] Extend jffs2_link_node_ref() to link into per-inode list too.
Let's avoid the potential for forgetting to set ref->next_in_ino, by doing
it within jffs2_link_node_ref() instead.

This highlights the ugliness of what we're currently doing with
xattr_datum and xattr_ref structures -- we should find a nicer way of
dealing with that.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-22 15:23:10 +01:00
David Woodhouse ca89a517fa [JFFS2] Finally eliminate __totlen field from struct jffs2_raw_node_ref
Well, almost. We'll actually keep a 'TEST_TOTLEN' macro set for now, and keep
doing some paranoia checks to make sure it's all working correctly. But if
TEST_TOTLEN is unset, the size of struct jffs2_raw_node_ref drops from 16
bytes to 12 on 32-bit machines. That's a saving of about half a megabyte of
memory on the OLPC prototype board, with 125K or so nodes in its 512MiB of
flash.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21 13:29:11 +01:00
David Woodhouse b64335f2b7 [JFFS2] Add length argument to jffs2_add_physical_node_ref()
If __totlen is going away, we need to pass the length in separately.
Also stop callers from needlessly setting ref->next_phys to NULL,
since that's done for them... and since that'll also be going away soon.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21 04:36:45 +01:00
David Woodhouse f1f9671bd8 [JFFS2] Introduce jffs2_link_node_ref() function to reduce code duplication
The same sequence of code was repeated in many places, to add a new
struct jffs2_raw_node_ref to an eraseblock and adjust the space accounting
accordingly. Move it out-of-line.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20 19:45:26 +01:00
David Woodhouse 1417fc44ee [JFFS2] Reduce calls to ref_totlen() in jffs2_mark_node_obsolete()
We were calling ref_totlen() 18 times. Even before that becomes a real
function rather than just a dereference, apparently some compilers still
suck anyway. It'll _certainly_ suck after ref_totlen() becomes more
complicated, so calculate it once and don't rely on CSE.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20 16:20:19 +01:00
Thomas Gleixner 182ec4eee3 [JFFS2] Clean up trailing white spaces
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-07 14:18:56 +01:00
Artem B. Bityutskiy 733802d974 [JFFS2] Debug code simplification, update TODO
Simplify the debugging code further.
Update the TODO list

Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06 22:20:33 +01:00
Ferenc Havasi 34c0e90671 [JFFS2] Account summary space in reserved_size.
Always keep valid data in reserved_size.

It did not cause problems, but the reservation code was unoptimal
when centralized summary was active or the size of the erase block
was very small.

Signed-off-by: Ferenc Havasi <havasi@inf.u-szeged.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06 21:47:18 +01:00
Ferenc Havasi e631ddba58 [JFFS2] Add erase block summary support (mount time improvement)
The goal of summary is to speed up the mount time. Erase block summary (EBS)
stores summary information at the end of every (closed) erase block. It is
no longer necessary to scan all nodes separetly (and read all pages of them)
just read this "small" summary, where every information is stored which is
needed at mount time.

This summary information is stored in a JFFS2_FEATURE_RWCOMPAT_DELETE. During
the mount process if there is no summary info the orignal scan process will
be executed. EBS works with NAND and NOR flashes, too.

There is a user space tool called sumtool to generate this summary
information for a JFFS2 image.

Signed-off-by: Ferenc Havasi <havasi@inf.u-szeged.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06 21:29:48 +01:00
Artem B. Bityutskiy e0c8e42f8f [JFFS2] Debug code clean up - step 3
Various simplifiactions. printk format corrections.
Convert more code to use the new debug functions.

Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06 17:06:49 +01:00
Artem B. Bityutskiy 730554d946 [JFFS2] Debug code clean up - step 1
Move debug functions into a seperate source file

Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06 16:21:25 +01:00
Artem B. Bityuckiy 4132ace8d6 [JFFS2] Suppress annoying debug messages
Embrace uneeded messages in D1().

Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 13:20:00 +02:00
Artem B. Bityuckiy 6f401a40b5 [JFFS2] Add KERN_DEBUG level to printks
Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 13:09:44 +02:00
Artem B. Bityuckiy 437316d9b5 [JFFS2] Forbid to free inode_cache objects if its nlink isn't zero.
Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 13:02:39 +02:00
Artem B. Bityuckiy 31fbdf7aa5 [JFFS2] Fix NOR specific scan BUG
Fix fairly sad NOR-specific bug - during FS building ic->scan_dents
isn't zero, but jffs2_mark_node_obsolete() migt be called it tries to
finde the ic corresponding to ref - this requires ic->scan_dents = 0.

Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 12:47:15 +02:00
David Woodhouse 67e345d17f [JFFS2] Prevent ino cache removal for inodes in use
Don't remove inocache for inodes which are in read_inode() or
clear_inode() until they're done.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 12:46:14 +02:00
Estelle Hammache 9b88f47390 [JFFS2] Code cleanup
Code beautification and block filing correction for optimization.

Signed-off-by: Estelle Hammache <estelle.hammache@st.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 12:16:06 +02:00
Estelle Hammache 3118db3dfe [JFFS2] Fix refile of blocks due to write failure.
avoid segfault when nextblock was refiled because of a write failure
- avoid filing blocks on the clean list when they have wasted
space

Signed-off-by: Estelle Hammache <estelle.hammache@st.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23 12:14:34 +02:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00