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2007-10-239p: add virtio transportEric Van Hensbergen1-3/+5
This adds a transport to 9p for communicating between guests and a host using a virtio based transport. Signed-off-by: Eric Van Hensbergen <[email protected]>
2007-10-22exportfs: update documentationChristoph Hellwig1-72/+43
Update documentation to the current state of affairs. Remove duplicated method descruptions in exportfs.h and point to Documentation/filesystems/ Exporting instead. Add a little file header comment in expfs.c describing what's going on and mentioning Neils and my copyright [1]. Signed-off-by: Christoph Hellwig <[email protected]> Cc: Neil Brown <[email protected]> Cc: "J. Bruce Fields" <[email protected]> Cc: <[email protected]> Cc: Dave Kleikamp <[email protected]> Cc: Anton Altaparmakov <[email protected]> Cc: David Chinner <[email protected]> Cc: Timothy Shimmin <[email protected]> Cc: OGAWA Hirofumi <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Chris Mason <[email protected]> Cc: Jeff Mahoney <[email protected]> Cc: "Vladimir V. Saveliev" <[email protected]> Cc: Steven Whitehouse <[email protected]> Cc: Mark Fasheh <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-10-20proc.txt: Add /proc/stat fieldLeonardo Chiquitto1-3/+4
This patch updates the "cat /proc/stat" output found in Documentation/filesystems/proc.txt. Signed-off-by: Adrian Bunk <[email protected]>
2007-10-20docs/sysfs: add missing word to sysfs attribute explanationShaun Zinck1-1/+1
Add the obvious missing word. Signed-off-by: Shaun Zinck <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2007-10-20documentation/ext3: grammar fixesShaun Zinck1-7/+7
Fix some grammar in the explanation of the Journal Block Device layer. Signed-off-by: Shaun Zinck <[email protected]> Acked-by: Randy Dunlap <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2007-10-20Documentation/filesystems/vfs.txt: typo fixShaun Zinck1-1/+1
Signed-off-by: Shaun Zinck <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2007-10-20Documentation/filesystems/files.txt: remove rcuref_inc_lf() reverencesEric Dumazet1-3/+3
rcuref_inc_lf() is not used anymore. Replace it by atomic_inc_not_zero() Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2007-10-20typo fixesMatt LaPlante1-1/+1
Most of these fixes were already submitted for old kernel versions, and were approved, but for some reason they never made it into the releases. Because this is a consolidation of a couple old missed patches, it touches both Kconfigs and documentation texts. Signed-off-by: Matt LaPlante <[email protected]> Acked-by: Randy Dunlap <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2007-10-19Fix misspellings of "system", "controller", "interrupt" and "necessary".Robert P. J. Day1-1/+1
Fix the various misspellings of "system", controller", "interrupt" and "[un]necessary". Signed-off-by: Robert P. J. Day <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2007-10-17Merge branch 'for-linus' of ↵Linus Torvalds1-6/+16
git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: 9p: remove sysctl 9p: fix bad kconfig cross-dependency 9p: soften invalidation in loose_mode 9p: attach-per-user 9p: rename uid and gid parameters 9p: define session flags 9p: Make transports dynamic
2007-10-179p: attach-per-userLatchesar Ionkov1-0/+10
The 9P2000 protocol requires the authentication and permission checks to be done in the file server. For that reason every user that accesses the file server tree has to authenticate and attach to the server separately. Multiple users can share the same connection to the server. Currently v9fs does a single attach and executes all I/O operations as a single user. This makes using v9fs in multiuser environment unsafe as it depends on the client doing the permission checking. This patch improves the 9P2000 support by allowing every user to attach separately. The patch defines three modes of access (new mount option 'access'): - attach-per-user (access=user) (default mode for 9P2000.u) If a user tries to access a file served by v9fs for the first time, v9fs sends an attach command to the server (Tattach) specifying the user. If the attach succeeds, the user can access the v9fs tree. As there is no uname->uid (string->integer) mapping yet, this mode works only with the 9P2000.u dialect. - allow only one user to access the tree (access=<uid>) Only the user with uid can access the v9fs tree. Other users that attempt to access it will get EPERM error. - do all operations as a single user (access=any) (default for 9P2000) V9fs does a single attach and all operations are done as a single user. If this mode is selected, the v9fs behavior is identical with the current one. Signed-off-by: Latchesar Ionkov <[email protected]> Signed-off-by: Eric Van Hensbergen <[email protected]>
2007-10-179p: rename uid and gid parametersLatchesar Ionkov1-2/+2
Change the names of 'uid' and 'gid' parameters to the more appropriate 'dfltuid' and 'dfltgid'. This also sets the default uid/gid to -2 (aka nfsnobody) Signed-off-by: Latchesar Ionkov <[email protected]> Signed-off-by: Eric Van Hensbergen <[email protected]>
2007-10-179p: Make transports dynamicEric Van Hensbergen1-4/+4
This patch abstracts out the interfaces to underlying transports so that new transports can be added as modules. This should also allow kernel configuration of transports without ifdef-hell. Signed-off-by: Eric Van Hensbergen <[email protected]>
2007-10-17x86: expand /proc/interrupts to include missing vectors, v2Joe Korty1-1/+29
Add missing IRQs and IRQ descriptions to /proc/interrupts. /proc/interrupts is most useful when it displays every IRQ vector in use by the system, not just those somebody thought would be interesting. This patch inserts the following vector displays to the i386 and x86_64 platforms, as appropriate: rescheduling interrupts TLB flush interrupts function call interrupts thermal event interrupts threshold interrupts spurious interrupts A threshold interrupt occurs when ECC memory correction is occuring at too high a frequency. Thresholds are used by the ECC hardware as occasional ECC failures are part of normal operation, but long sequences of ECC failures usually indicate a memory chip that is about to fail. Thermal event interrupts occur when a temperature threshold has been exceeded for some CPU chip. IIRC, a thermal interrupt is also generated when the temperature drops back to a normal level. A spurious interrupt is an interrupt that was raised then lowered by the device before it could be fully processed by the APIC. Hence the apic sees the interrupt but does not know what device it came from. For this case the APIC hardware will assume a vector of 0xff. Rescheduling, call, and TLB flush interrupts are sent from one CPU to another per the needs of the OS. Typically, their statistics would be used to discover if an interrupt flood of the given type has been occuring. AK: merged v2 and v4 which had some more tweaks AK: replace Local interrupts with Local timer interrupts AK: Fixed description of interrupt types. [ tglx: arch/x86 adaptation ] [ mingo: small cleanup ] Signed-off-by: Joe Korty <[email protected]> Signed-off-by: Andi Kleen <[email protected]> Cc: Tim Hockin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]>
2007-10-17Documentation: add entries to filesystems/00-INDEX for several untracked filesDenis Cheng1-0/+6
Signed-off-by: Denis Cheng <[email protected]> Cc: Rob Landley <[email protected]> Cc: "Randy.Dunlap" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-10-17quota: send messages via netlinkJan Kara1-0/+59
Implement sending of quota messages via netlink interface. The advantage is that in userspace we can better decide what to do with the message - for example display a dialogue in your X session or just write the message to the console. As a bonus, we can get rid of problems with console locking deep inside filesystem code once we remove the old printing mechanism. Signed-off-by: Jan Kara <[email protected]> Cc: Randy Dunlap <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-10-17docs: ramdisk/initrd/initramfs correctionsRandy Dunlap1-7/+7
initrd/initramfs/ramdisk docs: - fix typos/spellos/grammar - clarify RAM disk config location - correct cpio option Acked-by: Bryan O'Sullivan <[email protected]> Acked-by: Rob Landley <[email protected]> Cc: Werner Almesberger <[email protected]> Cc: H. Peter Anvin <[email protected]> Signed-off-by: Randy Dunlap <[email protected]> Acked-by: Jesper Juhl <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-10-16fs: remove some AOP_TRUNCATED_PAGENick Piggin1-5/+1
prepare/commit_write no longer returns AOP_TRUNCATED_PAGE since OCFS2 and GFS2 were converted to the new aops, so we can make some simplifications for that. [[email protected]: fix warning] Signed-off-by: Nick Piggin <[email protected]> Cc: Michael Halcrow <[email protected]> Cc: Mark Fasheh <[email protected]> Cc: Steven Whitehouse <[email protected]> Signed-off-by: Michal Piotrowski <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-10-16fs: introduce write_begin, write_end, and perform_write aopsNick Piggin2-3/+51
These are intended to replace prepare_write and commit_write with more flexible alternatives that are also able to avoid the buffered write deadlock problems efficiently (which prepare_write is unable to do). [[email protected]: API design contributions, code review and fixes] [[email protected]: various fixes] [[email protected]: new aop block_write_begin fix] Signed-off-by: Nick Piggin <[email protected]> Signed-off-by: Mark Fasheh <[email protected]> Signed-off-by: Dmitriy Monakhov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-10-15Merge branch 'locks' of git://linux-nfs.org/~bfields/linuxLinus Torvalds3-0/+242
* 'locks' of git://linux-nfs.org/~bfields/linux: nfsd: remove IS_ISMNDLCK macro Rework /proc/locks via seq_files and seq_list helpers fs/locks.c: use list_for_each_entry() instead of list_for_each() NFS: clean up explicit check for mandatory locks AFS: clean up explicit check for mandatory locks 9PFS: clean up explicit check for mandatory locks GFS2: clean up explicit check for mandatory locks Cleanup macros for distinguishing mandatory locks Documentation: move locks.txt in filesystems/ locks: add warning about mandatory locking races Documentation: move mandatory locking documentation to filesystems/ locks: Fix potential OOPS in generic_setlease() Use list_first_entry in locks_wake_up_blocks locks: fix flock_lock_file() comment Memory shortage can result in inconsistent flocks state locks: kill redundant local variable locks: reverse order of posix_locks_conflict() arguments
2007-10-12NTFS: Fix a mount time deadlock.Anton Altaparmakov1-1/+3
Big thanks go to Mathias Kolehmainen for reporting the bug, providing debug output and testing the patches I sent him to get it working. The fix was to stop calling ntfs_attr_set() at mount time as that causes balance_dirty_pages_ratelimited() to be called which on systems with little memory actually tries to go and balance the dirty pages which tries to take the s_umount semaphore but because we are still in fill_super() across which the VFS holds s_umount for writing this results in a deadlock. We now do the dirty work by hand by submitting individual buffers. This has the annoying "feature" that mounting can take a few seconds if the journal is large as we have clear it all. One day someone should improve on this by deferring the journal clearing to a helper kernel thread so it can be done in the background but I don't have time for this at the moment and the current solution works fine so I am leaving it like this for now. Signed-off-by: Anton Altaparmakov <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-10-09Documentation: move locks.txt in filesystems/J. Bruce Fields2-0/+69
This documentation (about file locking) belongs in filesystems/. Signed-off-by: J. Bruce Fields <[email protected]>
2007-10-09locks: add warning about mandatory locking racesJ. Bruce Fields1-1/+20
The mandatory file locking implementation has long-standing races that probably render it useless. I know of no plans to fix them. Till we do, we should at least warn people. Signed-off-by: J. Bruce Fields <[email protected]>
2007-10-09Documentation: move mandatory locking documentation to filesystems/J. Bruce Fields2-0/+154
Shouldn't this mandatory-locking documentation be in the Documentation/filesystems directory? Give it a more descriptive name while we're at it, and update 00-INDEX with a more inclusive description of Documentation/filesystems (which has already talked about more than just individual filesystems). Signed-off-by: J. Bruce Fields <[email protected]> Acked-by: Randy Dunlap <[email protected]>
2007-09-11Merge branch 'upstream-linus' of ↵Linus Torvalds1-4/+9
git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: ocfs2: Fix calculation of i_blocks during truncate [PATCH] ocfs2: Fix a wrong cluster calculation. [PATCH] ocfs2: fix mount option parsing ocfs2: update docs for new features
2007-09-11Documentation/00-INDEX: notice ecryptfs.txt movedRob Landley1-0/+2
ecryptfs.txt moved into filesystems, make 00-INDEX follow. Signed-off-by: Rob Landley <[email protected]> Cc: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-09-11ocfs2: update docs for new featuresMark Fasheh1-4/+9
Update documentation listing ocfs2 features to reflect the current state of the file system. Add missing descriptions for some mount options which ocfs2 supports. Signed-off-by: Mark Fasheh <[email protected]>
2007-08-239p: update maintainers and documentationEric Van Hensbergen1-5/+19
Updates to the MAINTAINERS file and documentation for 9p to point to the swik wiki versus the outdated sf.net page. Also updated some email addresses and added pointers to papers which better describe the implementation and application of the Linux 9p client. Signed-off-by: Eric Van Hensbergen <[email protected]>
2007-07-31Documentation: document HFSPlusWyatt Banks1-0/+59
Documentation: document HFSPlus filesystem and its mount options. Signed-off-by: Wyatt Banks <[email protected]> Cc: "Randy.Dunlap" <[email protected]> Cc: Roman Zippel <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-19some kmalloc/memset ->kzalloc (tree wide)Yoann Padioleau1-4/+2
Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc). Here is a short excerpt of the semantic patch performing this transformation: @@ type T2; expression x; identifier f,fld; expression E; expression E1,E2; expression e1,e2,e3,y; statement S; @@ x = - kmalloc + kzalloc (E1,E2) ... when != \(x->fld=E;\|y=f(...,x,...);\|f(...,x,...);\|x=E;\|while(...) S\|for(e1;e2;e3) S\) - memset((T2)x,0,E1); @@ expression E1,E2,E3; @@ - kzalloc(E1 * E2,E3) + kcalloc(E1,E2,E3) [[email protected]: get kcalloc args the right way around] Signed-off-by: Yoann Padioleau <[email protected]> Cc: Richard Henderson <[email protected]> Cc: Ivan Kokshaysky <[email protected]> Acked-by: Russell King <[email protected]> Cc: Bryan Wu <[email protected]> Acked-by: Jiri Slaby <[email protected]> Cc: Dave Airlie <[email protected]> Acked-by: Roland Dreier <[email protected]> Cc: Jiri Kosina <[email protected]> Acked-by: Dmitry Torokhov <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Acked-by: Mauro Carvalho Chehab <[email protected]> Acked-by: Pierre Ossman <[email protected]> Cc: Jeff Garzik <[email protected]> Cc: "David S. Miller" <[email protected]> Acked-by: Greg KH <[email protected]> Cc: James Bottomley <[email protected]> Cc: "Antonino A. Daplas" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-19coredump masking: documentation for /proc/pid/coredump_filterKawai, Hidehiro1-0/+38
This patch adds the documentation for /proc/<pid>/coredump_filter. Signed-off-by: Hidehiro Kawai <[email protected]> Cc: Alan Cox <[email protected]> Cc: David Howells <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Nick Piggin <[email protected]> Cc: "Randy.Dunlap" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-19audit: rework execve auditPeter Zijlstra1-0/+7
The purpose of audit_bprm() is to log the argv array to a userspace daemon at the end of the execve system call. Since user-space hasn't had time to run, this array is still in pristine state on the process' stack; so no need to copy it, we can just grab it from there. In order to minimize the damage to audit_log_*() copy each string into a temporary kernel buffer first. Currently the audit code requires that the full argument vector fits in a single packet. So currently it does clip the argv size to a (sysctl) limit, but only when execve auditing is enabled. If the audit protocol gets extended to allow for multiple packets this check can be removed. Signed-off-by: Peter Zijlstra <[email protected]> Signed-off-by: Ollie Wild <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-19mm: fault feedback #1Nick Piggin1-1/+1
Change ->fault prototype. We now return an int, which contains VM_FAULT_xxx code in the low byte, and FAULT_RET_xxx code in the next byte. FAULT_RET_ code tells the VM whether a page was found, whether it has been locked, and potentially other things. This is not quite the way he wanted it yet, but that's changed in the next patch (which requires changes to arch code). This means we no longer set VM_CAN_INVALIDATE in the vma in order to say that a page is locked which requires filemap_nopage to go away (because we can no longer remain backward compatible without that flag), but we were going to do that anyway. struct fault_data is renamed to struct vm_fault as Linus asked. address is now a void __user * that we should firmly encourage drivers not to use without really good reason. The page is now returned via a page pointer in the vm_fault struct. Signed-off-by: Nick Piggin <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-19Document ->page_mkwrite() lockingMark Fasheh1-1/+10
There seems to be very little documentation about this callback in general. The locking in particular is a bit tricky, so it's worth having this in writing. Signed-off-by: Mark Fasheh <[email protected]> Cc: Nick Piggin <[email protected]> Cc: David Howells <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-19mm: merge populate and nopage into fault (fixes nonlinear)Nick Piggin1-0/+2
Nonlinear mappings are (AFAIKS) simply a virtual memory concept that encodes the virtual address -> file offset differently from linear mappings. ->populate is a layering violation because the filesystem/pagecache code should need to know anything about the virtual memory mapping. The hitch here is that the ->nopage handler didn't pass down enough information (ie. pgoff). But it is more logical to pass pgoff rather than have the ->nopage function calculate it itself anyway (because that's a similar layering violation). Having the populate handler install the pte itself is likewise a nasty thing to be doing. This patch introduces a new fault handler that replaces ->nopage and ->populate and (later) ->nopfn. Most of the old mechanism is still in place so there is a lot of duplication and nice cleanups that can be removed if everyone switches over. The rationale for doing this in the first place is that nonlinear mappings are subject to the pagefault vs invalidate/truncate race too, and it seemed stupid to duplicate the synchronisation logic rather than just consolidate the two. After this patch, MAP_NONBLOCK no longer sets up ptes for pages present in pagecache. Seems like a fringe functionality anyway. NOPAGE_REFAULT is removed. This should be implemented with ->fault, and no users have hit mainline yet. [[email protected]: cleanup] [[email protected]: doc. fixes for readahead] [[email protected]: build fix] Signed-off-by: Nick Piggin <[email protected]> Signed-off-by: Randy Dunlap <[email protected]> Cc: Mark Fasheh <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-17eCryptfs: Move ecryptfs docs into Documentation/filesystems/Josef 'Jeff' Sipek1-0/+77
Signed-off-by: Josef 'Jeff' Sipek <[email protected]> Acked-by: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-17handle kernelcore=: genericMel Gorman1-0/+15
This patch adds the kernelcore= parameter for x86. Once all patches are applied, a new command-line parameter exist and a new sysctl. This patch adds the necessary documentation. From: Yasunori Goto <[email protected]> When "kernelcore" boot option is specified, kernel can't boot up on ia64 because of an infinite loop. In addition, the parsing code can be handled in an architecture-independent manner. This patch uses common code to handle the kernelcore= parameter. It is only available to architectures that support arch-independent zone-sizing (i.e. define CONFIG_ARCH_POPULATES_NODE_MAP). Other architectures will ignore the boot parameter. [[email protected]: make cmdline_parse_kernelcore() static] Signed-off-by: Mel Gorman <[email protected]> Signed-off-by: Yasunori Goto <[email protected]> Acked-by: Andy Whitcroft <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-16Merge branch 'upstream-linus' of ↵Linus Torvalds2-10/+49
git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: (32 commits) [PATCH] ocfs2: zero_user_page conversion ocfs2: Support xfs style space reservation ioctls ocfs2: support for removing file regions ocfs2: update truncate handling of partial clusters ocfs2: btree support for removal of arbirtrary extents ocfs2: Support creation of unwritten extents ocfs2: support writing of unwritten extents ocfs2: small cleanup of ocfs2_write_begin_nolock() ocfs2: btree changes for unwritten extents ocfs2: abstract btree growing calls ocfs2: use all extent block suballocators ocfs2: plug truncate into cached dealloc routines ocfs2: simplify deallocation locking ocfs2: harden buffer check during mapping of page blocks ocfs2: shared writeable mmap ocfs2: factor out write aops into nolock variants ocfs2: rework ocfs2_buffered_write_cluster() ocfs2: take ip_alloc_sem during entire truncate ocfs2: Add "preferred slot" mount option [KJ PATCH] Replacing memset(<addr>,0,PAGE_SIZE) with clear_page() in fs/ocfs2/dlm/dlmrecovery.c ...
2007-07-16update Documentation/filesystems/vfs.txtBorislav Petkov1-13/+16
Update Documentation/filesystems/vfs.txt Signed-off-by: Borislav Petkov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-16update description in Documentation/filesystems/vfs.txtBorislav Petkov1-9/+13
Update the description of struct file_system_type and get_sb() in Documentation/filesystems/vfs.txt to match the current code. Signed-off-by: Borislav Petkov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-16Documentation: /proc/$pid/stat filesKees Cook1-7/+58
Documentation for the /proc/$pid/stat file. Signed-off-by: Kees Cook <[email protected]> Cc: Rob Landley <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-10configfs: config item dependancies.Joel Becker1-0/+27
Sometimes other drivers depend on particular configfs items. For example, ocfs2 mounts depend on a heartbeat region item. If that region item is removed with rmdir(2), the ocfs2 mount must BUG or go readonly. Not happy. This provides two additional API calls: configfs_depend_item() and configfs_undepend_item(). A client driver can call configfs_depend_item() on an existing item to tell configfs that it is depended on. configfs will then return -EBUSY from rmdir(2) for that item. When the item is no longer depended on, the client driver calls configfs_undepend_item() on it. These API cannot be called underneath any configfs callbacks, as they will conflict. They can block and allocate. A client driver probably shouldn't calling them of its own gumption. Rather it should be providing an API that external subsystems call. How does this work? Imagine the ocfs2 mount process. When it mounts, it asks for a heart region item. This is done via a call into the heartbeat code. Inside the heartbeat code, the region item is looked up. Here, the heartbeat code calls configfs_depend_item(). If it succeeds, then heartbeat knows the region is safe to give to ocfs2. If it fails, it was being torn down anyway, and heartbeat can gracefully pass up an error. [ Fixed some bad whitespace in configfs.txt. --Mark ] Signed-off-by: Joel Becker <[email protected]> Signed-off-by: Mark Fasheh <[email protected]>
2007-07-10configfs: accessing item hierarchy during rmdir(2)Joel Becker1-0/+12
Add a notification callback, ops->disconnect_notify(). It has the same prototype as ->drop_item(), but it will be called just before the item linkage is broken. This way, configfs users who want to do work while the object is still in the heirarchy have a chance. Client drivers will still need to config_item_put() in their ->drop_item(), if they implement it. They need do nothing in ->disconnect_notify(). They don't have to provide it if they don't care. But someone who wants to be notified before ci_parent is set to NULL can now be notified. Signed-off-by: Joel Becker <[email protected]> Signed-off-by: Mark Fasheh <[email protected]>
2007-07-10configfs: Convert subsystem semaphore to mutexJoel Becker2-10/+10
Convert the su_sem member of struct configfs_subsystem to a struct mutex, as that's what it is. Also convert all the users and update Documentation/configfs.txt and Documentation/configfs_example.c accordingly. [ Conflict in fs/dlm/config.c with commit 3168b0780d06ace875696f8a648d04d6089654e5 manually resolved. --Mark ] Inspired-by: Satyam Sharma <[email protected]> Signed-off-by: Joel Becker <[email protected]> Signed-off-by: Mark Fasheh <[email protected]>
2007-06-08mount -t tmpfs -o mpol=: check nodes onlineHugh Dickins1-5/+5
Randy Dunlap reports that a tmpfs, mounted with NUMA mpol= specifying an offline node, crashes as soon as data is allocated upon it. Now restrict it to online nodes, where before it restricted to MAX_NUMNODES. Signed-off-by: Hugh Dickins <[email protected]> Cc: Robin Holt <[email protected]> Cc: Christoph Lameter <[email protected]> Cc: Andi Kleen <[email protected]> Tested-and-acked-by: Randy Dunlap <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-05-24Documentation: Fix up docs still talking about i_semJosef 'Jeff' Sipek2-6/+7
.. it got changed to 'i_mutex' some time ago. Signed-off-by: Josef 'Jeff' Sipek <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-05-09trivial: s/i_sem /i_mutex/Artem Bityutskiy1-3/+3
This patch substitutes i_sem by i_mutex in Documentation/filesystems/Locking. The patch also removes a couple of trailing white-spaces. Signed-off-by: Artem Bityutskiy <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2007-05-09misc doc and kconfig typosMatt LaPlante4-4/+4
Fix various typos in kernel docs and Kconfigs, 2.6.21-rc4. Signed-off-by: Matt LaPlante <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2007-05-09Fix more "deprecated" spellos.Randy Dunlap1-1/+1
Signed-off-by: Randy Dunlap <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2007-05-08Merge branch 'for-linus' of ↵Linus Torvalds1-1/+7
git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6: JFS: Fix race waking up jfsIO kernel thread JFS: use __set_current_state() Copy i_flags to jfs inode flags on write JFS: document uid, gid, and umask mount options in jfs.txt
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