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path: root/fs/jffs2/readinode.c
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2009-06-24switch jffs2 to inode->i_aclAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-02-21[JFFS2] fix mount crash caused by removed nodesThomas Gleixner
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>
2008-05-01[MTD][NOR] Add physical address to point() methodJared Hulbert
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[JFFS2] Track parent inode for directories (for NFS export)David Woodhouse
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>
2008-04-23[JFFS2] Introduce dbg_readinode2 log level, use it to shut read_dnode() upDavid Woodhouse
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>
2008-04-22[JFFS2] semaphore->mutex conversionDavid Woodhouse
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-02-07Merge git://git.infradead.org/mtd-2.6Linus Torvalds
* 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 ...
2008-02-03Typoes: "whith" -> "with"Robert P. J. Day
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Adrian Bunk <bunk@kernel.org>
2007-11-28[JFFS2] Fix return value check for mtd->point() in check_node_data()Alexey Korolev
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>
2007-11-21[JFFS2] Fix data CRC checking on NOR flash.David Woodhouse
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>
2007-09-23[JFFS2] Fix unpoint lengthAndy Lowe
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>
2007-07-10[JFFS2] Whitespace cleanups.David Woodhouse
Convert many spaces to tabs; one or two other minor cosmetic fixes. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-07-05[JFFS2] Print correct node offset when complaining about broken data CRCDavid Woodhouse
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>
2007-07-03[JFFS2] Fix readinode failure when read_dnode() detects CRC failure.David Woodhouse
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>
2007-06-29[JFFS2] Deletion dirents should be REF_NORMAL, not REF_PRISTINE.David Woodhouse
Otherwise they'll never actually get garbage-collected. Noted by Jonathan Larmour. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-06-01[JFFS2] Fix obsoletion of metadata nodes in jffs2_add_tn_to_tree()David Woodhouse
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[JFFS2] Fix buffer length calculations in jffs2_get_inode_nodes()Artem Bityutskiy
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>
2007-05-08[JFFS2] Simplify and clean up jffs2_add_tn_to_tree() some more.David Woodhouse
Fixing at least a couple more bugs in the process. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-05-07[JFFS2] Remove another bogus optimisation in jffs2_add_tn_to_tree()David Woodhouse
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>
2007-05-06[JFFS2] Remove broken insert_point optimisation in jffs2_add_tn_to_tree()David Woodhouse
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>
2007-05-05[JFFS2] Remember to calculate overlap on nodes which replace older nodesDavid Woodhouse
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>
2007-04-25[JFFS2] Handle inodes with only a single metadata node with non-zero isizeDavid Woodhouse
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[JFFS2] Tidy up licensing/copyright boilerplate.David Woodhouse
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[JFFS2] Better fix for all-zero node headersJoakim Tjernlund
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[JFFS2] Improve read_inode memory usage, v2.David Woodhouse
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>
2007-04-17[JFFS2] fix buffer sise calculations in jffs2_get_inode_nodes()Artem Bityutskiy
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>
2007-03-09[JFFS2] Check for all-zero node headersDavid Woodhouse
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>
2006-12-10[JFFS2] replace kmalloc+memset with kzallocYan Burman
Replace kmalloc+memset with kzalloc Signed-off-by: Yan Burman <burman.yan@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-07-02[JFFS2][XATTR] Fix memory leak in POSIX-ACL supportKaiGai Kohei
jffs2_clear_acl() which releases acl caches allocated by kmalloc() was defined but it was never called. Thus, we faced to the risk of memory leaking. This patch plugs jffs2_clear_acl() into jffs2_do_clear_inode(). It ensures to release acl cache when inode is cleared. Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-27[JFFS2][XATTR] Fix memory leak with jffs2_xattr_refKaiGai Kohei
If xattr_ref is associated with an orphan inode_cache on filesystem mounting, those xattr_refs are not released even if this inode_cache is released. This patch enables to call jffs2_xattr_delete_inode() for such a irregular inode_cachde too. Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-20Merge git://git.infradead.org/~dwmw2/rbtree-2.6Linus Torvalds
* git://git.infradead.org/~dwmw2/rbtree-2.6: [RBTREE] Switch rb_colour() et al to en_US spelling of 'color' for consistency Update UML kernel/physmem.c to use rb_parent() accessor macro [RBTREE] Update hrtimers to use rb_parent() accessor macro. [RBTREE] Add explicit alignment to sizeof(long) for struct rb_node. [RBTREE] Merge colour and parent fields of struct rb_node. [RBTREE] Remove dead code in rb_erase() [RBTREE] Update JFFS2 to use rb_parent() accessor macro. [RBTREE] Update eventpoll.c to use rb_parent() accessor macro. [RBTREE] Update key.c to use rb_parent() accessor macro. [RBTREE] Update ext3 to use rb_parent() accessor macro. [RBTREE] Change rbtree off-tree marking in I/O schedulers. [RBTREE] Add accessor macros for colour and parent fields of rb_node
2006-06-18[JFFS2] Check CRC32 on dirent and data nodes each time they're readDavid Woodhouse
Also, make sure dirents are marked REF_UNCHECKED when we 'discover' them through eraseblock summary. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-18[JFFS2] Don't trust node headers before the CRC is checked.David Woodhouse
Especially when summary code is used, we can have in-memory data structures referencing certain nodes without them actually being readable on the flash. Discard the nodes gracefully in that case, rather than triggering a BUG(). Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-04-21[RBTREE] Update JFFS2 to use rb_parent() accessor macro.David Woodhouse
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-04-11[PATCH] jffs2: fix printk warningsRandy Dunlap
Fix printk format warnings in jffs2. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-03-09[PATCH] mtd: 64 bit fixesAtsushi Nemoto
Fix some bugs in mtd/jffs2 on 64bit platform. The MEMGETBADBLOCK/MEMSETBADBLOCK ioctl are not listed in compat_ioctl.h. And some variables in jffs2 are declared as uint32_t but used to hold size_t values. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Thomas Gleixner <tglx@linutronix.de> Acked-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07[JFFS2] Clean up trailing white spacesThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Debug code simplification, update TODOArtem B. Bityutskiy
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[JFFS2] Calculate CRC check starting point correctlyArtem B. Bityutskiy
When data starts from the beginning of NAND page, 'len' must be zero, not c->wbuf_page. Thanks to Zoltan Sogor for reporting this problem. Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Fix JFFS2 [mc]time handlingArtem B. Bityutskiy
From: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Debug code clean up - step 7Artem B. Bityutskiy
Remove more noisy debugs. Add current->pid to debug messages. Remove bogus includes. Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Correct buggy length checksArtem B. Bityutskiy
The previous changes introduced wrong length calculations. Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Debug code clean up - step 6Artem B. Bityutskiy
Remove extra noisy debugs Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Build fragtree in reverse orderArtem B. Bityutskiy
Instead of building fragtree starting from node with the smallest version number, start from the highest. This helps to avoid reading and checking obsolete nodes. Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Move another fragtree-related function to nodelist.cArtem B. Bityutskiy
Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Fix up new debug code for eCos buildAndrew Lunn
The debug code cleanup broke the eCos build. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Debug code clean up - step 5Artem B. Bityutskiy
Replace the D1(printk()) style debugging with the new debug macros Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Move scattered function into related filesArtem B. Bityutskiy
Move functions to read inodes into readinode.c Move functions to handle fragtree and dentry lists into nodelist.[ch] Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Namespace clean upArtem B. Bityutskiy
Rename functions to a name matching the functionality. Remove stall debug code Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Debug code clean up - step 3Artem B. Bityutskiy
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>