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2012-08-22Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull ceph fixes from Sage Weil: "Jim's fix closes a narrow race introduced with the msgr changes. One fix resolves problems with debugfs initialization that Yan found when multiple client instances are created (e.g., two clusters mounted, or rbd + cephfs), another one fixes problems with mounting a nonexistent server subdirectory, and the last one fixes a divide by zero error from unsanitized ioctl input that Dan Carpenter found." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: ceph: avoid divide by zero in __validate_layout() libceph: avoid truncation due to racing banners ceph: tolerate (and warn on) extraneous dentry from mds libceph: delay debugfs initialization until we learn global_id
2012-08-22Merge tag 'nfs-for-3.6-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds
Pull NFS client bugfixes from Trond Myklebust: - NFSv3 mounts need to fail if the FSINFO rpc call fails - Ensure that the NFS commit cache gets torn down when we unload the NFS module. - Fix memory scribble issues when interrupting a LAYOUTGET rpc call - Fix NFSv4 legacy idmapper regressions - Fix issues with the NFSv4 getacl command - Fix a regression when using the legacy "mount -t nfs4" * tag 'nfs-for-3.6-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: NFSv3: Ensure that do_proc_get_root() reports errors correctly NFSv4: Ensure that nfs4_alloc_client cleans up on error. NFS: return -ENOKEY when the upcall fails to map the name NFS: Clear key construction data if the idmap upcall fails NFSv4: Don't use private xdr_stream fields in decode_getacl NFSv4: Fix the acl cache size calculation NFSv4: Fix pointer arithmetic in decode_getacl NFS: Alias the nfs module to nfs4 NFS: Fix a regression when loading the NFS v4 module NFSv4.1: Remove a bogus BUG_ON() in nfs4_layoutreturn_done pnfs-obj: Better IO pattern in case of unaligned offset NFS41: add pg_layout_private to nfs_pageio_descriptor pnfs: nfs4_proc_layoutget returns void pnfs: defer release of pages in layoutget nfs: tear down caches in nfs_init_writepagecache when allocation fails
2012-08-22Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull assorted fixes - mostly vfs - from Al Viro: "Assorted fixes, with an unexpected detour into vfio refcounting logics (fell out when digging in an analog of eventpoll race in there)." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: task_work: add a scheduling point in task_work_run() fs: fix fs/namei.c kernel-doc warnings eventpoll: use-after-possible-free in epoll_create1() vfio: grab vfio_device reference *before* exposing the sucker via fd_install() vfio: get rid of vfio_device_put()/vfio_group_get_device* races vfio: get rid of open-coding kref_put_mutex introduce kref_put_mutex() vfio: don't dereference after kfree... mqueue: lift mnt_want_write() outside ->i_mutex, clean up a bit
2012-08-22fs: fix fs/namei.c kernel-doc warningsRandy Dunlap
Fix kernel-doc warnings in fs/namei.c: Warning(fs/namei.c:360): No description found for parameter 'inode' Warning(fs/namei.c:672): No description found for parameter 'nd' Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-22eventpoll: use-after-possible-free in epoll_create1()Al Viro
As soon as we'd installed the file into descriptor table, it can get closed by another thread. Freeing ep in process... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-21ceph: avoid divide by zero in __validate_layout()Sage Weil
If "l->stripe_unit" is zero the the mod on the next line will cause a divide by zero bug. This comes from the copy_from_user() in ceph_ioctl_set_layout_policy(). Passing 0 is valid, though (it means "do not change") so avoid the % check in that case. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
2012-08-21ceph: tolerate (and warn on) extraneous dentry from mdsSage Weil
If the MDS gives us a dentry and we weren't prepared to handle it, WARN_ON_ONCE instead of crashing. Reported-by: Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
2012-08-20vfs: missed source of ->f_pos racesAl Viro
compat_sys_{read,write}v() need the same "pass a copy of file->f_pos" thing as sys_{read,write}{,v}(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-08-20libceph: delay debugfs initialization until we learn global_idSage Weil
The debugfs directory includes the cluster fsid and our unique global_id. We need to delay the initialization of the debug entry until we have learned both the fsid and our global_id from the monitor or else the second client can't create its debugfs entry and will fail (and multiple client instances aren't properly reflected in debugfs). Reported by: Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Yehuda Sadeh <yehuda@inktank.com>
2012-08-20NFSv3: Ensure that do_proc_get_root() reports errors correctlyTrond Myklebust
If the rpc call to NFS3PROC_FSINFO fails, then we need to report that error so that the mount fails. Otherwise we can end up with a superblock with completely unusable values for block sizes, maxfilesize, etc. Reported-by: Yuanming Chen <hikvision_linux@163.com> Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-08-20NFSv4: Ensure that nfs4_alloc_client cleans up on error.Trond Myklebust
Any pointer that was allocated through nfs_alloc_client() needs to be freed via a call to nfs_free_client(). Reported-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-08-18Merge branch 'vfs-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs Pull vfs fixes from Miklos Szeredi. This mainly fixes some confusion about whether the open 'mode' variable passed around should contain the full file type (S_IFREG etc) information or just the permission mode. In particular, the lack of proper file type information had confused fuse. * 'vfs-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs: vfs: fix propagation of atomic_open create error on negative dentry fuse: check create mode in atomic open vfs: pass right create mode to may_o_create() vfs: atomic_open(): fix create mode usage vfs: canonicalize create mode in build_open_flags()
2012-08-17Merge tag 'ext4_for_linus_stable' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 bug fixes from Ted Ts'o: "The following are all bug fixes and regressions. The most notable are the ones which cause problems for ext4 on RAID --- a performance problem when mounting very large filesystems, and a kernel OOPS when doing an rm -rf on large directory hierarchies on fast devices." * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: fix kernel BUG on large-scale rm -rf commands ext4: fix long mount times on very big file systems ext4: don't call ext4_error while block group is locked ext4: avoid kmemcheck complaint from reading uninitialized memory ext4: make sure the journal sb is written in ext4_clear_journal_err()
2012-08-17autofs4 - fix expire checkIan Kent
In some cases when an autofs indirect mount is contained in a file system that is marked as shared (such as when systemd does the equivalent of "mount --make-rshared /" early in the boot), mounts stop expiring. When this happens the first expiry check on a mountpoint dentry in autofs_expire_indirect() sees a mountpoint dentry with a higher than minimal reference count. Consequently the dentry is condidered busy and the actual expiry check is never done. This particular check was originally meant as an optimisation to detect a path walk in progress but with the addition of rcu-walk it can be ineffective anyway. Removing the test allows automounts to expire again since the actual expire check doesn't rely on the dentry reference count. Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-08-17ext4: fix kernel BUG on large-scale rm -rf commandsTheodore Ts'o
Commit 968dee7722: "ext4: fix hole punch failure when depth is greater than 0" introduced a regression in v3.5.1/v3.6-rc1 which caused kernel crashes when users ran run "rm -rf" on large directory hierarchy on ext4 filesystems on RAID devices: BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 Process rm (pid: 18229, threadinfo ffff8801276bc000, task ffff880123631710) Call Trace: [<ffffffff81236483>] ? __ext4_handle_dirty_metadata+0x83/0x110 [<ffffffff812353d3>] ext4_ext_truncate+0x193/0x1d0 [<ffffffff8120a8cf>] ? ext4_mark_inode_dirty+0x7f/0x1f0 [<ffffffff81207e05>] ext4_truncate+0xf5/0x100 [<ffffffff8120cd51>] ext4_evict_inode+0x461/0x490 [<ffffffff811a1312>] evict+0xa2/0x1a0 [<ffffffff811a1513>] iput+0x103/0x1f0 [<ffffffff81196d84>] do_unlinkat+0x154/0x1c0 [<ffffffff8118cc3a>] ? sys_newfstatat+0x2a/0x40 [<ffffffff81197b0b>] sys_unlinkat+0x1b/0x50 [<ffffffff816135e9>] system_call_fastpath+0x16/0x1b Code: 8b 4d 20 0f b7 41 02 48 8d 04 40 48 8d 04 81 49 89 45 18 0f b7 49 02 48 83 c1 01 49 89 4d 00 e9 ae f8 ff ff 0f 1f 00 49 8b 45 28 <48> 8b 40 28 49 89 45 20 e9 85 f8 ff ff 0f 1f 80 00 00 00 RIP [<ffffffff81233164>] ext4_ext_remove_space+0xa34/0xdf0 This could be reproduced as follows: The problem in commit 968dee7722 was that caused the variable 'i' to be left uninitialized if the truncate required more space than was available in the journal. This resulted in the function ext4_ext_truncate_extend_restart() returning -EAGAIN, which caused ext4_ext_remove_space() to restart the truncate operation after starting a new jbd2 handle. Reported-by: Maciej Żenczykowski <maze@google.com> Reported-by: Marti Raudsepp <marti@juffo.org> Tested-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
2012-08-17ext4: fix long mount times on very big file systemsTheodore Ts'o
Commit 8aeb00ff85a: "ext4: fix overhead calculation used by ext4_statfs()" introduced a O(n**2) calculation which makes very large file systems take forever to mount. Fix this with an optimization for non-bigalloc file systems. (For bigalloc file systems the overhead needs to be set in the the superblock.) Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
2012-08-17ext4: don't call ext4_error while block group is lockedTheodore Ts'o
While in ext4_validate_block_bitmap(), if an block allocation bitmap is found to be invalid, we call ext4_error() while the block group is still locked. This causes ext4_commit_super() to call a function which might sleep while in an atomic context. There's no need to keep the block group locked at this point, so hoist the ext4_error() call up to ext4_validate_block_bitmap() and release the block group spinlock before calling ext4_error(). The reported stack trace can be found at: http://article.gmane.org/gmane.comp.file-systems.ext4/33731 Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
2012-08-16NFS: return -ENOKEY when the upcall fails to map the nameBryan Schumaker
This allows the normal error-paths to handle the error, rather than making a special call to complete_request_key() just for this instance. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Tested-by: William Dauchy <wdauchy@gmail.com> Cc: stable@vger.kernel.org [>= 3.4] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-08-16NFS: Clear key construction data if the idmap upcall failsBryan Schumaker
idmap_pipe_downcall already clears this field if the upcall succeeds, but if it fails (rpc.idmapd isn't running) the field will still be set on the next call triggering a BUG_ON(). This patch tries to handle all possible ways that the upcall could fail and clear the idmap key data for each one. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Tested-by: William Dauchy <wdauchy@gmail.com> Cc: stable@vger.kernel.org [>= 3.4] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-08-16NFSv4: Don't use private xdr_stream fields in decode_getaclTrond Myklebust
Instead of using the private field xdr->p from struct xdr_stream, use the public xdr_stream_pos(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-08-16NFSv4: Fix the acl cache size calculationTrond Myklebust
Currently, we do not take into account the size of the 16 byte struct nfs4_cached_acl header, when deciding whether or not we should cache the acl data. Consequently, we will end up allocating an 8k buffer in order to fit a maximum size 4k acl. This patch adjusts the calculation so that we limit the cache size to 4k for the acl header+data. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-08-16NFSv4: Fix pointer arithmetic in decode_getaclTrond Myklebust
Resetting the cursor xdr->p to a previous value is not a safe practice: if the xdr_stream has crossed out of the initial iovec, then a bunch of other fields would need to be reset too. Fix this issue by using xdr_enter_page() so that the buffer gets page aligned at the bitmap _before_ we decode it. Also fix the confusion of the ACL length with the page buffer length by not adding the base offset to the ACL length... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@vger.kernel.org
2012-08-16NFS: Alias the nfs module to nfs4bjschuma@gmail.com
This allows distros to remove the line from their modprobe configuration. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-08-16NFS: Fix a regression when loading the NFS v4 modulebjschuma@gmail.com
Some systems have a modprobe.d/nfs.conf file that sets an nfs4 alias pointing to nfs.ko, rather than nfs4.ko. This can prevent the v4 module from loading on mount, since the kernel sees that something named "nfs4" has already been loaded. To work around this, I've renamed the modules to "nfsv2.ko" "nfsv3.ko" and "nfsv4.ko". I also had to move the nfs4_fs_type back to nfs.ko to ensure that `mount -t nfs4` still works. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-08-16autofs4 - fix get_next_positive_subdir()Ian Kent
Following a report of a crash during an automount expire I found that the locking in fs/autofs4/expire.c:get_next_positive_subdir() was wrong. Not only is the locking wrong but the function is more complex than it needs to be. The function is meant to calculate (and dget) the next entry in the list of directories contained in the root of an autofs mount point (an autofs indirect mount to be precise). The main problem was that the d_lock of the owner of the list was not being taken when walking the list, which lead to list corruption under load. The only other lock that needs to be taken is against the next dentry candidate so it can be checked for usability. Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-08-16Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse Pull fuse updates from Miklos Szeredi. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: fuse: verify all ioctl retry iov elements fuse: add missing INIT flag descriptions fuse: add missing INIT flags fuse: update attributes on aio_read fuse: invalidate inode mapping if mtime changes fuse: add FUSE_AUTO_INVAL_DATA init flag
2012-08-16vfs: fix propagation of atomic_open create error on negative dentrySage Weil
If ->atomic_open() returns -ENOENT, we take care to return the create error (e.g., EACCES), if any. Do the same when ->atomic_open() returns 1 and provides a negative dentry. This fixes a regression where an unprivileged open O_CREAT fails with ENOENT instead of EACCES, introduced with the new atomic_open code. It is tested by the open/08.t test in the pjd posix test suite, and was observed on top of fuse (backed by ceph-fuse). Signed-off-by: Sage Weil <sage@inktank.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
2012-08-15fuse: check create mode in atomic openMiklos Szeredi
Verify that the VFS is passing us a complete create mode with the S_IFREG to atomic open. Reported-by: Steve <steveamigauk@yahoo.co.uk> Reported-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Tested-by: Richard W.M. Jones <rjones@redhat.com>
2012-08-15vfs: pass right create mode to may_o_create()Miklos Szeredi
Pass the umask-ed create mode to may_o_create() instead of the original one. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Tested-by: Richard W.M. Jones <rjones@redhat.com>
2012-08-15vfs: atomic_open(): fix create mode usageMiklos Szeredi
Don't mask S_ISREG off the create mode before passing to ->atomic_open(). Other methods (->create, ->mknod) also get the complete file mode and filesystems expect it. Reported-by: Steve <steveamigauk@yahoo.co.uk> Reported-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Tested-by: Richard W.M. Jones <rjones@redhat.com>
2012-08-15vfs: canonicalize create mode in build_open_flags()Miklos Szeredi
Userspace can pass weird create mode in open(2) that we canonicalize to "(mode & S_IALLUGO) | S_IFREG" in vfs_create(). The problem is that we use the uncanonicalized mode before calling vfs_create() with unforseen consequences. So do the canonicalization early in build_open_flags(). Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Tested-by: Richard W.M. Jones <rjones@redhat.com> CC: stable@vger.kernel.org
2012-08-12Merge branch 'for-linus-3.6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs Pull btrfs merge fix from Chris Mason: "This fixes a merge error in rc1. The calls to mnt_want_write should have been removed." * 'for-linus-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: remove mnt_want_write call in btrfs_mksubvol
2012-08-09Btrfs: remove mnt_want_write call in btrfs_mksubvolAlexander Block
We got a recursive lock in mksubvol because the caller already held a lock. I think we got into this due to a merge error. Commit a874a63 removed the mnt_want_write call from btrfs_mksubvol and added a replacement call to mnt_want_write_file in btrfs_ioctl_snap_create_transid. Commit e7848683 however tried to move all calls to mnt_want_write above i_mutex. So somewhere while merging this, it got mixed up. The solution is to remove the mnt_want_write call completely from mksubvol. Reported-by: David Sterba <dave@jikos.cz> Signed-off-by: Alexander Block <ablock84@googlemail.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-08NFSv4.1: Remove a bogus BUG_ON() in nfs4_layoutreturn_doneTrond Myklebust
Ever since commit 0a57cdac3f (NFSv4.1 send layoutreturn to fence disconnected data server) we've been sending layoutreturn calls while there is potentially still outstanding I/O to the data servers. The reason we do this is to avoid races between replayed writes to the MDS and the original writes to the DS. When this happens, the BUG_ON() in nfs4_layoutreturn_done can be triggered because it assumes that we would never call layoutreturn without knowing that all I/O to the DS is finished. The fix is to remove the BUG_ON() now that the assumptions behind the test are obsolete. Reported-by: Boaz Harrosh <bharrosh@panasas.com> Reported-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@vger.kernel.org [>=3.5]
2012-08-06fuse: verify all ioctl retry iov elementsZach Brown
Commit 7572777eef78ebdee1ecb7c258c0ef94d35bad16 attempted to verify that the total iovec from the client doesn't overflow iov_length() but it only checked the first element. The iovec could still overflow by starting with a small element. The obvious fix is to check all the elements. The overflow case doesn't look dangerous to the kernel as the copy is limited by the length after the overflow. This fix restores the intention of returning an error instead of successfully copying less than the iovec represented. I found this by code inspection. I built it but don't have a test case. I'm cc:ing stable because the initial commit did as well. Signed-off-by: Zach Brown <zab@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: <stable@vger.kernel.org> [2.6.37+]
2012-08-05ext4: avoid kmemcheck complaint from reading uninitialized memoryTheodore Ts'o
Commit 03179fe923 introduced a kmemcheck complaint in ext4_da_get_block_prep() because we save and restore ei->i_da_metadata_calc_last_lblock even though it is left uninitialized in the case where i_da_metadata_calc_len is zero. This doesn't hurt anything, but silencing the kmemcheck complaint makes it easier for people to find real bugs. Addresses https://bugzilla.kernel.org/show_bug.cgi?id=45631 (which is marked as a regression). Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
2012-08-05ext4: make sure the journal sb is written in ext4_clear_journal_err()Theodore Ts'o
After we transfer set the EXT4_ERROR_FS bit in the file system superblock, it's not enough to call jbd2_journal_clear_err() to clear the error indication from journal superblock --- we need to call jbd2_journal_update_sb_errno() as well. Otherwise, when the root file system is mounted read-only, the journal is replayed, and the error indicator is transferred to the superblock --- but the s_errno field in the jbd2 superblock is left set (since although we cleared it in memory, we never flushed it out to disk). This can end up confusing e2fsck. We should make e2fsck more robust in this case, but the kernel shouldn't be leaving things in this confused state, either. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@kernel.org
2012-08-04missed mnt_drop_write() in do_dentry_open()Al Viro
This one ought to be __mnt_drop_write(), to match __mnt_want_write() in the beginning... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04UBIFS: nuke pdflush from commentsArtem Bityutskiy
The pdflush thread is long gone, so this patch removes references to pdflush from UBIFS comments. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04gfs2: nuke pdflush from commentsArtem Bityutskiy
The pdflush thread is long gone, so this patch removes references to pdflush from gfs comments. Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04nilfs2: nuke write_super from commentsArtem Bityutskiy
The '->write_super' superblock method is gone, and this patch removes all the references to 'write_super' from ntfs. Cc: KONISHI Ryusuke <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04hfs: nuke write_super from commentsArtem Bityutskiy
The '->write_super' superblock method is gone, and this patch removes all the references to 'write_super' from hfs. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04vfs: nuke pdflush from commentsArtem Bityutskiy
The pdflush thread is long gone, so this patch removes references to pdflush from vfs comments. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04jbd/jbd2: nuke write_super from commentsArtem Bityutskiy
The '->write_super' superblock method is gone, and this patch removes all the references to 'write_super' from various jbd and jbd2. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jan Kara <jack@suse.cz> Cc: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04btrfs: nuke pdflush from commentsArtem Bityutskiy
The pdflush thread is long gone, so this patch removes references to pdflush from btrfs comments. Cc: Chris Mason <chris.mason@fusionio.com> Cc: linux-btrfs@vger.kernel.org Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04btrfs: nuke write_super from commentsArtem Bityutskiy
The '->write_super' superblock method is gone, and this patch removes all the references to 'write_super' from btrfs. Cc: Chris Mason <chris.mason@fusionio.com> Cc: linux-btrfs@vger.kernel.org Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04ext4: nuke pdflush from commentsArtem Bityutskiy
The pdflush thread is long gone, so this patch removes references to pdflush from ext4 comments. Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04ext4: nuke write_super from commentsArtem Bityutskiy
The '->write_super' superblock method is gone, and this patch removes all the references to 'write_super' from ext3. Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04ext3: nuke write_super from commentsArtem Bityutskiy
The '->write_super' superblock method is gone, and this patch removes all the references to 'write_super' from ext3. Cc: Jan Kara <jack@suse.cz> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-04vfs: kill write_super and sync_supersArtem Bityutskiy
Finally we can kill the 'sync_supers' kernel thread along with the '->write_super()' superblock operation because all the users are gone. Now every file-system is supposed to self-manage own superblock and its dirty state. The nice thing about killing this thread is that it improves power management. Indeed, 'sync_supers' is a source of monotonic system wake-ups - it woke up every 5 seconds no matter what - even if there were no dirty superblocks and even if there were no file-systems using this service (e.g., btrfs and journalled ext4 do not need it). So it was wasting power most of the time. And because the thread was in the core of the kernel, all systems had to have it. So I am quite happy to make it go away. Interestingly, this thread is a left-over from the pdflush kernel thread which was a self-forking kernel thread responsible for all the write-back in old Linux kernels. It was turned into per-block device BDI threads, and 'sync_supers' was a left-over. Thus, R.I.P, pdflush as well. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>