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2011-01-12fs: fix kernel-doc for dcache::d_validateRandy Dunlap
Fix function parameter kernel-doc for d_validate(): Warning(fs/dcache.c:1495): No description found for parameter 'parent' Warning(fs/dcache.c:1495): Excess function parameter 'dparent' description in 'd_validate' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12sanitize ecryptfs ->mount()Al Viro
kill ecryptfs_read_super(), reorder code allowing to use normal d_alloc_root() instead of opencoding it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch afsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12move internal-only parts of ncpfs headers to fs/ncpfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch ncpfsAl Viro
merge dentry_operations for root and non-root Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch 9pAl Viro
here we actually *want* ->d_op for root; setting it allows to get rid of kludge in v9fs_kill_super() since now we have proper ->d_release() for root and don't need to call it manually. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12pass default dentry_operations to mount_pseudo()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch hostfsAl Viro
->d_delete() doesn't matter for s_root anyway Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch affsAl Viro
either d_op instance would work for root, actually... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch configfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12take coda-private headers out of include/linuxAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch codaAl Viro
Coda ->d_revalidate() actually checks for root, ->d_delete() is irrelevant. So we can use the same d_op for all coda dentries Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch hpfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch btrfs, close racesAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch ocfs2, close racesAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch gfs2, close racesAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch cifsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch nfs to ->s_d_opAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch adfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch hfsplusAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch hfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12minixfs: kill dead codeAl Viro
->d_op of root stays NULL these days on minixfs Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch sysvAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch fuseAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch jfs to ->s_d_op, close exportfs racesAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12switch fat to ->s_d_op, close exportfs races thereAl Viro
don't bother with lock_super() in fat_fill_super() callers, while we are at it - there won't be any concurrency anyway. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12fix isofs d_op handlingAl Viro
switch to ->s_d_op; d_obtain_alias() will DTRT now Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12per-superblock default ->d_opAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12ceph: fsc->*_wq's aren't used in memory reclaim pathTejun Heo
fsc->*_wq's aren't depended upon during memory reclaim. Convert to alloc_workqueue() w/o WQ_MEM_RECLAIM. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Sage Weil <sage@newdream.net> Cc: ceph-devel@vger.kernel.org Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12ceph: Makefile: Remove unnessary codeTracey Dent
Remove the if and else conditional because the code is in mainline and there is no need in it being there. Also, Changed Makefile to use <modules>-y instead of <modules>-objs because -objs is deprecated and not mentioned in Documentation/kbuild/makefiles.txt. Signed-off-by: Tracey Dent <tdent48227@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12ceph: associate requests with opening sessionsSage Weil
Associate request with sessions that aren't yep open. This makes the debugfs mdsc request list more informative. Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12ceph: drop redundant r_mds fieldSage Weil
The r_mds field is redundant, since we can find the same information at r_session->s_mds, and when r_session is NULL then r_mds is meaningless. Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12ceph: implement DIRLAYOUTHASH feature to get dir layout from MDSSage Weil
This implements the DIRLAYOUTHASH protocol feature, which passes the dir layout over the wire from the MDS. This gives the client knowledge of the correct hash function to use for mapping dentries among dir fragments. Note that if this feature is _not_ present on the client but is on the MDS, the client may misdirect requests. This will result in a forward and degrade performance. It may also result in inaccurate NFS filehandle generation, which will prevent fh resolution when the inode is not present in the client cache and the parent directories have been fragmented. Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12ceph: add dir_layout to inodeSage Weil
Add a ceph_dir_layout to the inode, and calculate dentry hash values based on the parent directory's specified dir_hash function. This is needed because the old default Linux dcache hash function is extremely week and leads to a poor distribution of files among dir fragments. Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12quota: Fix deadlock during path resolutionJan Kara
As Al Viro pointed out path resolution during Q_QUOTAON calls to quotactl is prone to deadlocks. We hold s_umount semaphore for reading during the path resolution and resolution itself may need to acquire the semaphore for writing when e. g. autofs mountpoint is passed. Solve the problem by performing the resolution before we get hold of the superblock (and thus s_umount semaphore). The whole thing is complicated by the fact that some filesystems (OCFS2) ignore the path argument. So to distinguish between filesystem which want the path and which do not we introduce new .quota_on_meta callback which does not get the path. OCFS2 then uses this callback instead of old .quota_on. CC: Al Viro <viro@ZenIV.linux.org.uk> CC: Christoph Hellwig <hch@lst.de> CC: Ted Ts'o <tytso@mit.edu> CC: Joel Becker <joel.becker@oracle.com> Signed-off-by: Jan Kara <jack@suse.cz>
2011-01-12NTFS: writev() fix and maintenance/contact details updateAnton Altaparmakov
Fix writev() to not keep writing the first segment over and over again instead of moving onto subsequent segments and update the NTFS entry in MAINTAINERS to reflect that Tuxera Inc. now supports the NTFS driver. Signed-off-by: Anton Altaparmakov <anton@tuxera.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-12xfs: prevent NMI timeouts in cmn_errDave Chinner
We currently have a global error message buffer in cmn_err that is protected by a spin lock that disables interrupts. Recently there have been reports of NMI timeouts occurring when the console is being flooded by SCSI error reports due to cmn_err() getting stuck trying to print to the console while holding this lock (i.e. with interrupts disabled). The NMI watchdog is seeing this CPU as non-responding and so is triggering a panic. While the trigger for the reported case is SCSI errors, pretty much anything that spams the kernel log could cause this to occur. Realistically the only reason that we have the intemediate message buffer is to prepend the correct kernel log level prefix to the log message. The only reason we have the lock is to protect the global message buffer and the only reason the message buffer is global is to keep it off the stack. Hence if we can avoid needing a global message buffer we avoid needing the lock, and we can do this with a small amount of cleanup and some preprocessor tricks: 1. clean up xfs_cmn_err() panic mask functionality to avoid needing debug code in xfs_cmn_err() 2. remove the couple of "!" message prefixes that still exist that the existing cmn_err() code steps over. 3. redefine CE_* levels directly to KERN_* 4. redefine cmn_err() and friends to use printk() directly via variable argument length macros. By doing this, we can completely remove the cmn_err() code and the lock that is causing the problems, and rely solely on printk() serialisation to ensure that we don't get garbled messages. A series of followup patches is really needed to clean up all the cmn_err() calls and related messages properly, but that results in a series that is not easily back portable to enterprise kernels. Hence this initial fix is only to address the direct problem in the lowest impact way possible. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-01-11xfs: Add log level to assertion printkAnton Blanchard
I received a ppc64 bug report involving xfs but the assertion was filtered out by the console log level. Use KERN_CRIT to ensure it makes it out. Signed-off-by: Anton Blanchard <anton@samba.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-01-11xfs: fix an assignment within an ASSERT()Jesper Juhl
In fs/xfs/xfs_trans.c::xfs_trans_unreserve_and_mod_sb() at the out: label we have this: ASSERT(error = 0); I believe a comparison was intended, not an assignment. If I'm right, the patch below fixes that up. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-01-11xfs: fix error handling for synchronous writesChristoph Hellwig
If we get an IO error on a synchronous superblock write, we attach an error release function to it so that when the last reference goes away the release function is called and the buffer is invalidated and unlocked. The buffer is left locked until the release function is called so that other concurrent users of the buffer will be locked out until the buffer error is fully processed. Unfortunately, for the superblock buffer the filesyetm itself holds a reference to the buffer which prevents the reference count from dropping to zero and the release function being called. As a result, once an IO error occurs on a sync write, the buffer will never be unlocked and all future attempts to lock the buffer will hang. To make matters worse, this problems is not unique to such buffers; if there is a concurrent _xfs_buf_find() running, the lookup will grab a reference to the buffer and then wait on the buffer lock, preventing the reference count from ever falling to zero and hence unlocking the buffer. As such, the whole b_relse function implementation is broken because it cannot rely on the buffer reference count falling to zero to unlock the errored buffer. The synchronous write error path is the only path that uses this callback - it is used to ensure that the synchronous waiter gets the buffer error before the error state is cleared from the buffer by the release function. Given that the only sychronous buffer writes now go through xfs_bwrite and the error path in question can only occur for a write of a dirty, logged buffer, we can move most of the b_relse processing to happen inline in xfs_buf_iodone_callbacks, just like a normal I/O completion. In addition to that we make sure the error is not cleared in xfs_buf_iodone_callbacks, so that xfs_bwrite can reliably check it. Given that xfs_bwrite keeps the buffer locked until it has waited for it and checked the error this allows to reliably propagate the error to the caller, and make sure that the buffer is reliably unlocked. Given that xfs_buf_iodone_callbacks was the only instance of the b_relse callback we can remove it entirely. Based on earlier patches by Dave Chinner and Ajeet Yadav. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Ajeet Yadav <ajeet.yadav.77@gmail.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-01-11xfs: add FITRIM supportChristoph Hellwig
Allow manual discards from userspace using the FITRIM ioctl. This is not intended to be run during normal workloads, as the freepsace btree walks can cause large performance degradation. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-01-11xfs: ensure log covering transactions are synchronousDave Chinner
To ensure the log is covered and the filesystem idles correctly, we need to ensure that dummy transactions hit the disk and do not stay pinned in memory. If the superblock is pinned in memory, it can't be flushed so the log covering cannot make progress. The result is dependent on timing - more oftent han not we continue to issues a log covering transaction every 36s rather than idling after ~90s. Fix this by making the log covering transaction synchronous. To avoid additional log force from xfssyncd, make the log covering transaction take the place of the existing log force in the xfssyncd background sync process. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-01-11Merge branch 'nfs-for-2.6.38' of ↵Linus Torvalds
git://git.linux-nfs.org/projects/trondmy/nfs-2.6 * 'nfs-for-2.6.38' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (89 commits) NFS fix the setting of exchange id flag NFS: Don't use vm_map_ram() in readdir NFSv4: Ensure continued open and lockowner name uniqueness NFS: Move cl_delegations to the nfs_server struct NFS: Introduce nfs_detach_delegations() NFS: Move cl_state_owners and related fields to the nfs_server struct NFS: Allow walking nfs_client.cl_superblocks list outside client.c pnfs: layout roc code pnfs: update nfs4_callback_recallany to handle layouts pnfs: add CB_LAYOUTRECALL handling pnfs: CB_LAYOUTRECALL xdr code pnfs: change lo refcounting to atomic_t pnfs: check that partial LAYOUTGET return is ignored pnfs: add layout to client list before sending rpc pnfs: serialize LAYOUTGET(openstateid) pnfs: layoutget rpc code cleanup pnfs: change how lsegs are removed from layout list pnfs: change layout state seqlock to a spinlock pnfs: add prefix to struct pnfs_layout_hdr fields pnfs: add prefix to struct pnfs_layout_segment fields ...
2011-01-11Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6: UDF: Close small mem leak in udf_find_entry() udf: Fix directory corruption after extent merging udf: Protect udf_file_aio_write from possible races udf: Remove unnecessary bkl usages udf: Use of s_alloc_mutex to serialize udf_relocate_blocks() execution udf: Replace bkl with the UDF_I(inode)->i_data_sem for protect udf_inode_info struct udf: Remove BKL from free space counting functions udf: Call udf_add_free_space() for more blocks at once in udf_free_blocks() udf: Remove BKL from udf_put_super() and udf_remount_fs() udf: Protect default inode credentials by rwlock udf: Protect all modifications of LVID with s_alloc_mutex udf: Move handling of uniqueID into a helper function and protect it by a s_alloc_mutex udf: Remove BKL from udf_update_inode udf: Convert UDF_SB(sb)->s_flags to use bitops fs/udf: Add printf format/argument verification fs/udf: Use vzalloc (Evil merge: this also removes the BKL dependency from the Kconfig file)
2011-01-11Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (44 commits) ext4: fix trimming starting with block 0 with small blocksize ext4: revert buggy trim overflow patch ext4: don't pass entire map to check_eofblocks_fl ext4: fix memory leak in ext4_free_branches ext4: remove ext4_mb_return_to_preallocation() ext4: flush the i_completed_io_list during ext4_truncate ext4: add error checking to calls to ext4_handle_dirty_metadata() ext4: fix trimming of a single group ext4: fix uninitialized variable in ext4_register_li_request ext4: dynamically allocate the jbd2_inode in ext4_inode_info as necessary ext4: drop i_state_flags on architectures with 64-bit longs ext4: reorder ext4_inode_info structure elements to remove unneeded padding ext4: drop ec_type from the ext4_ext_cache structure ext4: use ext4_lblk_t instead of sector_t for logical blocks ext4: replace i_delalloc_reserved_flag with EXT4_STATE_DELALLOC_RESERVED ext4: fix 32bit overflow in ext4_ext_find_goal() ext4: add more error checks to ext4_mkdir() ext4: ext4_ext_migrate should use NULL not 0 ext4: Use ext4_error_file() to print the pathname to the corrupted inode ext4: use IS_ERR() to check for errors in ext4_error_file ...
2011-01-11Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: ext2: Resolve 'dereferencing pointer to incomplete type' when enabling EXT2_XATTR_DEBUG ext3: Remove redundant unlikely() ext2: Remove redundant unlikely() ext3: speed up file creates by optimizing rec_len functions ext2: speed up file creates by optimizing rec_len functions ext3: Add more journal error check ext3: Add journal error check in resize.c quota: Use %pV and __attribute__((format (printf in __quota_error and fix fallout ext3: Add FITRIM handling ext3: Add batched discard support for ext3 ext3: Add journal error check into ext3_rename() ext3: Use search_dirblock() in ext3_dx_find_entry() ext3: Avoid uninitialized memory references with a corrupted htree directory ext3: Return error code from generic_check_addressable ext3: Add journal error check into ext3_delete_entry() ext3: Add error check in ext3_mkdir() fs/ext3/super.c: Use printf extension %pV fs/ext2/super.c: Use printf extension %pV ext3: don't update sb journal_devnum when RO dev
2011-01-11Merge branch 'for-linus' of ↵Linus Torvalds
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: fs/9p: Don't set dentry->d_op in create routines fs/9p: fix spelling typo fs/9p: TREADLINK bugfix net/9p: Use proper data types fs/9p: Simplify the .L create operation fs/9p: Move dotl inode operations into a seperate file fs/9p: fix menu presentation fs/9p: Fix the return error on default acl removal fs/9p: Remove unnecessary semicolons
2011-01-11ext4: fix trimming starting with block 0 with small blocksizeJan Kara
When s_first_data_block is not zero (which happens e.g. when block size is 1KB) and trim ioctl is called to start trimming from block 0, the math in ext4_get_group_no_and_offset() overflows. The overall result is that ioctl returns EINVAL which is kind of unexpected and we probably don't want userspace tools to bother with internal details of filesystem structure. So just silently increase starting offset (and shorten length) when starting block is below s_first_data_block. CC: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-01-11nfsd4: allow restarting callbacksJ. Bruce Fields
If we lose the backchannel and then the client repairs the problem, resend any callbacks. We use a new cb_done flag to track whether there is still work to be done for the callback or whether it can be destroyed with the rpc. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-01-11nfsd4: simplify nfsd4_cb_prepareJ. Bruce Fields
Remove handling for a nonexistant case (status && !-EAGAIN). Signed-off-by: J. Bruce Fields <bfields@redhat.com>