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* mtd: do not use mtd->block_markbad directlyArtem Bityutskiy2012-01-091-3/+0
| | | | | | | | Instead, use the new 'mtd_can_have_bb()', or just rely on 'mtd_block_markbad()' return code, which will be -EOPNOTSUPP if bad blocks are not supported. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_block_markbad interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_write_oob interfaceArtem Bityutskiy2012-01-091-1/+1
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_read_oob interfaceArtem Bityutskiy2012-01-091-2/+2
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_write interfaceArtem Bityutskiy2012-01-091-9/+9
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: introduce mtd_read interfaceArtem Bityutskiy2012-01-091-4/+5
| | | | | Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: rename MTD_OOB_* to MTD_OPS_*Brian Norris2011-09-111-3/+3
| | | | | | | | | | These modes are not necessarily for OOB only. Particularly, MTD_OOB_RAW affected operations on in-band page data as well. To clarify these options and to emphasize that their effect is applied per-operation, we change the primary prefix to MTD_OPS_. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
* jffs2: use mutex_is_locked() in __jffs2_flush_wbuf()Alexey Khoroshilov2011-09-111-2/+1
| | | | | | | | Use a helper to test if a mutex is held instead of a hack with mutex_trylock(). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
* Fix common misspellingsLucas De Marchi2011-03-311-1/+1
| | | | | | Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
* jffs2: Rename jffs2_erase_pending_trigger() to jffs2_dirty_trigger()Joakim Tjernlund2010-05-191-1/+1
| | | | | | | | | Now that we do erases from GC and trigger the GC thread to do them instead of using kupdated, this function is misnamed. It's only used for triggering wbuf flush on NAND flash now. Rename it accordingly. Signed-off-by: Joakim Tjernlund <joakim.tjernlund@transmode.se> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* jffs2: Use jffs2_garbage_collect_trigger() to trigger pending erasesDavid Woodhouse2010-05-191-3/+3
| | | | | | This is now done in a GC pass; we don't need to trigger kupdated to do it. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* JFFS2: add missing verify buffer allocation/deallocationMassimo Cirillo2009-09-031-0/+10
| | | | | | | | | | | | | | | 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
* [JFFS2] Write buffer offset adjustment for NOR-ECC (Sibley) flashAlexander Belyakov2008-10-181-4/+1
| | | | | | | | | | | | | 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>
* [JFFS2] Track parent inode for directories (for NFS export)David Woodhouse2008-05-011-1/+1
| | | | | | | | 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>
* [JFFS2] Invert last argument of jffs2_gc_fetch_inode(), make it boolean.David Woodhouse2008-05-011-1/+1
| | | | | | | 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>
* [JFFS2] semaphore->mutex conversionDavid Woodhouse2008-04-221-8/+8
| | | | Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [JFFS2] add write verify on dataflash.michael2008-04-221-0/+12
| | | | | | | | | 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>
* [JFFS2] Correct cleanmarker checks -- we should use only 8 bytesDavid Woodhouse2007-08-091-2/+2
| | | | | | | | | | Commit a7a6ace1406f95c3edb8365788f85984377f3832 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>
* [JFFS2] Add support for write-buffer verification.David Woodhouse2007-07-111-10/+63
| | | | | | | | | | 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>
* [JFFS2] Whitespace cleanups.David Woodhouse2007-07-101-2/+2
| | | | | | Convert many spaces to tabs; one or two other minor cosmetic fixes. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [JFFS2] Don't advance c->wbuf_ofs to next eraseblock after wbuf flushDavid Woodhouse2007-05-051-1/+4
| | | | | | | | | | | 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>
* Merge branch 'master' of ↵David Woodhouse2007-04-271-0/+24
|\ | | | | | | | | | | | | | | | | | | 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>
| * JFFS2: add UBI supportArtem Bityutskiy2007-04-271-0/+24
| | | | | | | | | | | | | | 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>
* | [JFFS2] Tidy up licensing/copyright boilerplate.David Woodhouse2007-04-251-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | [JFFS2] Fix cross-endian build.David Woodhouse2007-04-231-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | [JFFS2] Disable summary after wbuf recoveryAdrian Hunter2007-04-171-0/+3
|/ | | | | | | | | | | | | | | | | 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>
* [JFFS2] print a message when marking bad blockArtem Bityutskiy2007-03-091-1/+1
| | | | | | | | 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>
* [JFFS2] Fix writebuffer recovery in the first page of a blockVitaly Wool2007-03-081-1/+4
| | | | | | | | | | | | | 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>
* [JFFS2] printk warning fixesAndrew Morton2007-02-181-9/+9
| | | | | | | | | | | | | | | 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>
* [JFFS2] Use MTD_OOB_AUTO to automatically place cleanmarker on NANDArtem Bityutskiy2007-02-091-136/+67
| | | | | | | | | | | | | | | | | 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>
* Merge branch 'master' of ↵David Woodhouse2007-01-181-0/+1
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
| * [PATCH] severing fs.h, radix-tree.h -> sched.hAl Viro2006-12-041-0/+1
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | [MTD] [NAND] remove len/ooblen confusion.Vitaly Wool2006-11-281-12/+9
|/ | | | | | | | | | | | | | | | | | | | As was discussed between Ricard Wanderlöf, David Woodhouse, Artem Bityutskiy and me, the current API for reading/writing OOB is confusing. The thing that introduces confusion is the need to specify ops.len together with ops.ooblen for reads/writes that concern only OOB not data area. So, ops.len is overloaded: when ops.datbuf != NULL it serves to specify the length of the data read, and when ops.datbuf == NULL, it serves to specify the full OOB read length. The patch inlined below is the slightly updated version of the previous patch serving the same purpose, but with the new Artem's comments taken into account. Artem, BTW, thanks a lot for your valuable input! Signed-off-by: Vitaly Wool <vwool@ru.mvista.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [PATCH] fs: use list_move()Akinobu Mita2006-06-261-2/+1
| | | | | | | | | | | | | | | | 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>
* [MTD] NAND Signal that a bitflip was corrected by ECCThomas Gleixner2006-05-291-15/+17
| | | | | | | | Return -EUCLEAN on read when a bitflip was detected and corrected, so the clients can react and eventually copy the affected block to a spare one. Make all in kernel users aware of the change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] Rework the out of band handling completelyThomas Gleixner2006-05-291-112/+118
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hopefully the last iteration on this! The handling of out of band data on NAND was accompanied by tons of fruitless discussions and halfarsed patches to make it work for a particular problem. Sufficiently annoyed by I all those "I know it better" mails and the resonable amount of discarded "it solves my problem" patches, I finally decided to go for the big rework. After removing the _ecc variants of mtd read/write functions the solution to satisfy the various requirements was to refactor the read/write _oob functions in mtd. The major change is that read/write_oob now takes a pointer to an operation descriptor structure "struct mtd_oob_ops".instead of having a function with at least seven arguments. read/write_oob which should probably renamed to a more descriptive name, can do the following tasks: - read/write out of band data - read/write data content and out of band data - read/write raw data content and out of band data (ecc disabled) struct mtd_oob_ops has a mode field, which determines the oob handling mode. Aside of the MTD_OOB_RAW mode, which is intended to be especially for diagnostic purposes and some internal functions e.g. bad block table creation, the other two modes are for mtd clients: MTD_OOB_PLACE puts/gets the given oob data exactly to/from the place which is described by the ooboffs and ooblen fields of the mtd_oob_ops strcuture. It's up to the caller to make sure that the byte positions are not used by the ECC placement algorithms. MTD_OOB_AUTO puts/gets the given oob data automaticaly to/from the places in the out of band area which are described by the oobfree tuples in the ecclayout data structre which is associated to the devicee. The decision whether data plus oob or oob only handling is done depends on the setting of the datbuf member of the data structure. When datbuf == NULL then the internal read/write_oob functions are selected, otherwise the read/write data routines are invoked. Tested on a few platforms with all variants. Please be aware of possible regressions for your particular device / application scenario Disclaimer: Any whining will be ignored from those who just contributed "hot air blurb" and never sat down to tackle the underlying problem of the mess in the NAND driver grown over time and the big chunk of work to fix up the existing users. The problem was not the holiness of the existing MTD interfaces. The problems was the lack of time to go for the big overhaul. It's easy to add more mess to the existing one, but it takes alot of effort to go for a real solution. Improvements and bugfixes are welcome! Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] NAND Replace oobinfo by ecclayoutThomas Gleixner2006-05-291-35/+16
| | | | | | | | | The nand_oobinfo structure is not fitting the newer error correction demands anymore. Replace it by struct nand_ecclayout and fixup the users all over the place. Keep the nand_oobinfo based ioctl for user space compability reasons. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [MTD] NAND Consolidate oobinfo handlingThomas Gleixner2006-05-291-1/+1
| | | | | | | | | The info structure for out of band data was copied into the mtd structure. Make it a pointer and remove the ability to set it from userspace. The position of ecc bytes is defined by the hardware and should not be changed by software. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [JFFS2] Fix wbuf recovery of f->metadata->raw node.David Woodhouse2006-05-271-1/+5
| | | | | | A data node might not be in the fraglist; it could be f->metadata. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [JFFS2] Switch to using an array of jffs2_raw_node_refs instead of a list.David Woodhouse2006-05-261-84/+203
| | | | | | | | 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>
* [JFFS2] Add 'jeb' argument to jffs2_prealloc_raw_node_refs()David Woodhouse2006-05-251-4/+4
| | | | | | | 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>
* Merge branch 'master' of git://git.infradead.org/~gleixner/mtd-nand-2.6.gitDavid Woodhouse2006-05-241-20/+8
|\
| * [MTD] Remove read/write _ecc variantsThomas Gleixner2006-05-231-20/+8
| | | | | | | | | | | | | | MTD clients are agnostic of FLASH which needs ECC suppport. Remove the functions and fixup the callers. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | [JFFS2] Reduce visibility of raw_node_ref to upper layers of JFFS2 code.David Woodhouse2006-05-241-17/+9
|/ | | | | | | | | | | | | 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>
* Merge branch 'master' of /home/tglx/work/kernel/git/mtd-2.6/Thomas Gleixner2006-05-231-42/+10
|\ | | | | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Remove flash offset argument from various functions.David Woodhouse2006-05-231-1/+3
| | | | | | | | | | | | | | | | 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>
| * [MTD] Merge STMicro NOR_ECC code with Intel Sibley codeJoern Engel2006-05-221-33/+3
| | | | | | | | | | | | | | | | | | In 2002, STMicro started producing NOR flashes with internal ECC protection for small blocks (8 or 16 bytes). Support for those flashes was added by me. In 2005, Intel Sibley flashes copied this strategy and Nico added support for those. Merge the code for both. Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>
| * [MTD] Introduce writesizeJoern Engel2006-05-221-3/+3
| | | | | | | | | | | | | | | | At least two flashes exists that have the concept of a minimum write unit, similar to NAND pages, but no other NAND characteristics. Therefore, rename the minimum write unit to "writesize" for all flashes, including NAND. Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>
| * [JFFS2] Extend jffs2_link_node_ref() to link into per-inode list too.David Woodhouse2006-05-221-4/+2
| | | | | | | | | | | | | | | | | | | | | | 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>
* | [JFFS2] Simplify writebuffer handlingThomas Gleixner2006-05-231-170/+102
|/ | | | | | | | | | The writev based write buffer implementation was far to complex as in most use cases the write buffer had to be handled anyway. Simplify the write buffer handling and use mtd->write instead. From extensive testing no performance impact has been noted. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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