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* [PATCH] introduce slave mountsRam Pai2005-11-07
| | | | | | | | | | A slave mount always has a master mount from which it receives mount/umount events. Unlike shared mount the event propagation does not flow from the slave mount to the master. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] shared mounts handling: umountRam Pai2005-11-07
| | | | | | | | | | An unmount of a mount creates a umount event on the parent. If the parent is a shared mount, it gets propagated to all mounts in the peer group. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] shared mounts handling: moveRam Pai2005-11-07
| | | | | | | | | | Implement handling of mount --move in presense of shared mounts (see Documentation/sharedsubtree.txt in the end of patch series for detailed description). Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] shared mount handling: bind and rbindRam Pai2005-11-07
| | | | | | | | | | Implement handling of MS_BIND in presense of shared mounts (see Documentation/sharedsubtree.txt in the end of patch series for detailed description). Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] introduce shared mountsRam Pai2005-11-07
| | | | | | | | | | | This creates shared mounts. A shared mount when bind-mounted to some mountpoint, propagates mount/umount events to each other. All the shared mounts that propagate events to each other belong to the same peer-group. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] beginning of the shared-subtree properRam Pai2005-11-07
| | | | | | | | | A private mount does not forward or receive propagation. This patch provides user the ability to convert any mount to private. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] making namespace_sem globalRam Pai2005-11-07
| | | | | | | | | | This removes the per-namespace semaphore in favor of a global semaphore. This can have an effect on namespace scalability. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mount expiry fixesRam Pai2005-11-07
| | | | | | | | | | | | - clean up the ugliness in may_umount_tree() - fix a bug in do_loopback(). after cloning a tree, do_loopback() unlinks only the topmost mount of the cloned tree, leaving behind the children mounts on their corresponding expiry list. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] umount_tree() locking changeRam Pai2005-11-07
| | | | | | | | | | | | | | | | umount is done under the protection of the namespace semaphore. This can lead to intresting deadlocks when the last reference to a mount is released, if filesystem code is in sufficiently nasty state. This collects all the to-be-released-mounts and releases them after releasing the namespace semaphore. That both reduces the time we are holding namespace semaphore and gets the things more robust. Idea proposed by Al Viro. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sanitize the interface of graft_tree().Ram Pai2005-11-07
| | | | | | | | | | | | | | | | Old semantics: graft_tree() grabs a reference on the vfsmount before returning success. New one: graft_tree() leaves that to caller. All the callers of graft_tree() immediately dropped that reference anyway. Changing the interface takes care of this unnecessary overhead. Idea proposed by Al Viro. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] lindent fs/namespace.cRam Pai2005-11-07
| | | | | | Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] make /proc/mounts pollableAl Viro2005-11-07
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] allow callers of seq_open do allocation themselvesAl Viro2005-11-07
| | | | | | | | | Allow caller of seq_open() to kmalloc() seq_file + whatever else they want and set ->private_data to it. seq_open() will then abstain from doing allocation itself. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] cleanups and bug fix in do_loopback()Al Viro2005-11-07
| | | | | | | | | | | | | | - check_mnt() on the source of binding should've been unconditional from the very beginning. My fault - as far I could've trace it, that's an old thinko made back in 2001. Kudos to Miklos for spotting it... Fixed. - code cleaned up. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] saner handling of auto_acct_off() and DQUOT_OFF() in umountAl Viro2005-11-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The way we currently deal with quota and process accounting that might keep vfsmount busy at umount time is inherently broken; we try to turn them off just in case (not quite correctly, at that) and a) pray umount doesn't fail (otherwise they'll stay turned off) b) pray nobody doesn anything funny just as we turn quota off Moreover, LSM provides hooks for doing the same sort of broken logics. The proper way to deal with that is to introduce the second kind of reference to vfsmount. Semantics: - when the last normal reference is dropped, all special ones are converted to normal ones and if there had been any, cleanup is done. - normal reference can be cloned into a special one - special reference can be converted to normal one; that's a no-op if we'd already passed the point of no return (i.e. mntput() had converted special references to normal and started cleanup). The way it works: e.g. starting process accounting converts the vfsmount reference pinned by the opened file into special one and turns it back to normal when it gets shut down; acct_auto_close() is done when no normal references are left. That way it does *not* obstruct umount(2) and it silently gets turned off when the last normal reference to vfsmount is gone. Which is exactly what we want... The same should be done by LSM module that holds some internal references to vfsmount and wants to shut them down on umount - it should make them special and security_sb_umount_close() will be called exactly when the last normal reference to vfsmount is gone. quota handling is even simpler - we don't use normal file IO anymore, so there's no need to hold vfsmounts at all. DQUOT_OFF() is done from deactivate_super(), where it really belongs. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/tglx/mtd-2.6Linus Torvalds2005-11-07
|\ | | | | | | Some manual fixups for clashing kfree() cleanups etc.
| * [JFFS2] Clean up trailing white spacesThomas Gleixner2005-11-07
| | | | | | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Fix broken compile when debug level = 2Artem B. Bityutskiy2005-11-06
| | | | | | | | | | Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Return 0, not number of bytes written, for success at commit_writeTodd Poynor2005-11-06
| | | | | | | | | | | | | | | | | | | | Some callers to block-layer commit_write function treat non-zero return as error, notably the loopback mount driver sometimes used in conjunction with JFFS2 on NAND flash for bad block avoidance, etc. Return zero for success as do various other commit_write functions. Signed-off-by: Todd Poynor <tpoynor@mvista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Fix dataflash supportArtem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | | | | | | | - assume wbuf may be of size which is not power of 2 - don't make strange assumption about not padding wbuf for DataFlash - use wbuf = DataFlash page and eraseblock >= 8 Dataflash pages From: Peter Menzebach <pm-mtd@mw-itcon.de> Acked-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Use memset(struct) instead of nulling struct members one by oneArtem B. Bityutskiy2005-11-06
| | | | | | | | | | Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Remove stale commentArtem B. Bityutskiy2005-11-06
| | | | | | | | | | Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Rename jffs2_summary_node to jffs2_raw_summaryFerenc Havasi2005-11-06
| | | | | | | | | | Signed-off-by: Ferenc Havasi <havasi@inf.u-szeged.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Debug code simplification, update TODOArtem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | | | 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>
| * [JFFS2] Account summary space in reserved_size.Ferenc Havasi2005-11-06
| | | | | | | | | | | | | | | | | | | | | | 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>
| * [JFFS2] Debug message format clean upArtem B. Bityutskiy2005-11-06
| | | | | | | | | | Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Call summary collector for all mtd devices with writev supportFerenc Havasi2005-11-06
| | | | | | | | | | | | | | | | | | Do the summary collection in the right place. If the device was not writebuffered but had c->mtd->writev function (e.g. blkmtd) the summary collector function was not called. Signed-off-by: Ferenc Havasi <havasi@inf.u-szeged.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Return real jffs2_sum_init() error codeFerenc Havasi2005-11-06
| | | | | | | | | | Signed-off-by: Ferenc Havasi <havasi@inf.u-szeged.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Add erase block summary support (mount time improvement)Ferenc Havasi2005-11-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * [JFFS2] Remove support for virtual blocksFerenc Havasi2005-11-06
| | | | | | | | | | | | | | | | | | | | | | Remove support for virtual blocks, which are build by concatenation of multiple physical erase blocks. For more information please read the MTD mailing list thread "[PATCH] remove support for virtual blocks" Signed-off-by: Ferenc Havasi <havasi@inf.u-szeged.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Solve BUG caused by frag->node representing a hole in fragtreeArtem B. Bityutskiy2005-11-06
| | | | | | | | | | Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Calculate CRC check starting point correctlyArtem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | | | | | | | 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>
| * [JFFS2] More message formatting cleanupsArtem B. Bityutskiy2005-11-06
| | | | | | | | | | Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Fix JFFS2 [mc]time handlingArtem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | From: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Make the JFFS2 messages a bit nicerArtem B. Bityutskiy2005-11-06
| | | | | | | | | | Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Teach JFFS2 about Sibley flashNicolas Pitre2005-11-06
| | | | | | | | | | | | | | Intels Sibley flash needs JFFS2 write buffer functionality Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Debug code clean up - step 7Artem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | | | 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>
| * [JFFS2] Correct buggy length checksArtem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | The previous changes introduced wrong length calculations. Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Debug code clean up - step 6Artem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | Remove extra noisy debugs Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Build fragtree in reverse orderArtem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | | | | | 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>
| * [JFFS2] Refine fragtree debug macrosArtem B. Bityutskiy2005-11-06
| | | | | | | | | | Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Move another fragtree-related function to nodelist.cArtem B. Bityutskiy2005-11-06
| | | | | | | | | | Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Fix up new debug code for eCos buildAndrew Lunn2005-11-06
| | | | | | | | | | | | | | The debug code cleanup broke the eCos build. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Debug code clean up - step 5Artem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | 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>
| * [JFFS2] Move scattered function into related filesArtem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | | | 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>
| * [JFFS2] Debug code clean up - step 4Artem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | Small comment cleanups. Remove a unused macro Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [jffs2] Remove compressor lzo and lzariFerenc Havasi2005-11-06
| | | | | | | | | | | | | | Remove unused compressor code Signed-off-by: Ferenc Havasi <havasi@inf.u-szeged.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * [JFFS2] Namespace clean upArtem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | | | 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>
| * [JFFS2] Debug code clean up - step 3Artem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | | | 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>
| * [JFFS2] Fix slab panicArtem B. Bityutskiy2005-11-06
| | | | | | | | | | | | | | | | | | | | When JFFS22 is unable to read the root inode, the bad root inode object is not freed and remains sticked in the jffs2_i slab cache. When we further try to free the slab cache (e.g., on rmmod jffs2), slab allocator subsystem panics. Fix this bug. Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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