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2008-10-12provide generic_block_fiemap() only with BLOCK=yAdrian Bunk
This fixes the following compile error with CONFIG_BLOCK=n caused by commit 68c9d702bb72f367f3b148963ec6cf5e07ff7f65 ("generic block based fiemap implementation"): CC fs/ioctl.o fs/ioctl.c: In function 'generic_block_fiemap': fs/ioctl.c:249: error: storage size of 'tmp' isn't known fs/ioctl.c:272: error: invalid application of 'sizeof' to incomplete type 'struct buffer_head' fs/ioctl.c:280: error: implicit declaration of function 'buffer_mapped' fs/ioctl.c:249: warning: unused variable 'tmp' make[2]: *** [fs/ioctl.o] Error 1 Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Josef Bacik <jbacik@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-12[CIFS] cifs: remove pointless lock and unlock of GlobalMid_Lock in ↵Jeff Layton
header_assemble We lock GlobalMid_Lock in header_assemble and then immediately unlock it again without doing anything. Not sure what this was intended to do, but remove it. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-10-11Merge 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: (43 commits) ext4: Rename ext4dev to ext4 ext4: Avoid double dirtying of super block in ext4_put_super() Update ext4 MAINTAINERS file Hook ext4 to the vfs fiemap interface. generic block based fiemap implementation ocfs2: fiemap support vfs: vfs-level fiemap interface ext4: fix xattr deadlock jbd2: Fix buffer head leak when writing the commit block ext4: Add debugging markers that can be used by systemtap jbd2: abort instead of waiting for nonexistent transaction ext4: fix initialization of UNINIT bitmap blocks ext4: Remove old legacy block allocator ext4: Use readahead when reading an inode from the inode table ext4: Improve the documentation for ext4's /proc tunables ext4: Combine proc file handling into a single set of functions ext4: move /proc setup and teardown out of mballoc.c ext4: Don't use 'struct dentry' for internal lookups ext4/jbd2: Avoid WARN() messages when failing to write to the superblock ext4: use percpu data structures for lg_prealloc_list ...
2008-10-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: [CIFS] Check that last search entry resume key is valid [CIFS] make sure we have the right resume info before calling CIFSFindNext [CIFS] clean up error handling in cifs_unlink [CIFS] fix some settings of cifsAttrs after calling SetFileInfo and SetPathInfo cifs: explicitly revoke SPNEGO key after session setup cifs: Convert cifs to new aops. [CIFS] update DOS attributes in cifsInode if we successfully changed them cifs: remove NULL termination from rename target in CIFSSMBRenameOpenFIle cifs: work around samba returning -ENOENT on SetFileDisposition call cifs: fix inverted NULL check after kmalloc [CIFS] clean up upcall handling for dns_resolver keys [CIFS] fix busy-file renames and refactor cifs_rename logic cifs: add function to set file disposition [CIFS] add constants for string lengths of keynames in SPNEGO upcall string cifs: move rename and delete-on-close logic into helper function cifs: have find_writeable_file prefer filehandles opened by same task cifs: don't use GFP_KERNEL with GFP_NOFS [CIFS] use common code for turning off ATTR_READONLY in cifs_unlink cifs: clean up variables in cifs_unlink
2008-10-10ext4: add an option to control error handling on file dataHidehiro Kawai
If the journal doesn't abort when it gets an IO error in file data blocks, the file data corruption will spread silently. Because most of applications and commands do buffered writes without fsync(), they don't notice the IO error. It's scary for mission critical systems. On the other hand, if the journal aborts whenever it gets an IO error in file data blocks, the system will easily become inoperable. So this patch introduces a filesystem option to determine whether it aborts the journal or just call printk() when it gets an IO error in file data. If you mount an ext4 fs with data_err=abort option, it aborts on file data write error. If you mount it with data_err=ignore, it doesn't abort, just call printk(). data_err=ignore is the default. Here is the corresponding patch of the ext3 version: http://kerneltrap.org/mailarchive/linux-kernel/2008/9/9/3239374 Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-10-10jbd2: don't dirty original metadata buffer on abortHidehiro Kawai
Currently, original metadata buffers are dirtied when they are unfiled whether the journal has aborted or not. Eventually these buffers will be written-back to the filesystem by pdflush. This means some metadata buffers are written to the filesystem without journaling if the journal aborts. So if both journal abort and system crash happen at the same time, the filesystem would become inconsistent state. Additionally, replaying journaled metadata can overwrite the latest metadata on the filesystem partly. Because, if the journal gets aborted, journaled metadata are preserved and replayed during the next mount not to lose uncheckpointed metadata. This would also break the consistency of the filesystem. This patch prevents original metadata buffers from being dirtied on abort by clearing BH_JBDDirty flag from those buffers. Thus, no metadata buffers are written to the filesystem without journaling. Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-10-10ext4: add checks for errors from jbd2Hidehiro Kawai
If the journal has aborted due to a checkpointing failure, we have to keep the contents of the journal space. Otherwise, the filesystem will lose uncheckpointed metadata completely and become inconsistent. To avoid this, we need to keep needs_recovery flag if checkpoint has failed. With this patch, ext4_put_super() detects a checkpointing failure from the return value of journal_destroy(), then it invokes ext4_abort() to make the filesystem read only and keep needs_recovery flag. Errors from jbd2_journal_flush() are also handled by this patch in some places. Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-10-10jbd2: fix error handling for checkpoint ioHidehiro Kawai
When a checkpointing IO fails, current JBD2 code doesn't check the error and continue journaling. This means latest metadata can be lost from both the journal and filesystem. This patch leaves the failed metadata blocks in the journal space and aborts journaling in the case of jbd2_log_do_checkpoint(). To achieve this, we need to do: 1. don't remove the failed buffer from the checkpoint list where in the case of __try_to_free_cp_buf() because it may be released or overwritten by a later transaction 2. jbd2_log_do_checkpoint() is the last chance, remove the failed buffer from the checkpoint list and abort the journal 3. when checkpointing fails, don't update the journal super block to prevent the journaled contents from being cleaned. For safety, don't update j_tail and j_tail_sequence either 4. when checkpointing fails, notify this error to the ext4 layer so that ext4 don't clear the needs_recovery flag, otherwise the journaled contents are ignored and cleaned in the recovery phase 5. if the recovery fails, keep the needs_recovery flag 6. prevent jbd2_cleanup_journal_tail() from being called between __jbd2_journal_drop_transaction() and jbd2_journal_abort() (a possible race issue between jbd2_log_do_checkpoint()s called by jbd2_journal_flush() and __jbd2_log_wait_for_space()) Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-10-12jbd2: abort when failed to log metadata buffersHidehiro Kawai
If we failed to write metadata buffers to the journal space and succeeded to write the commit record, stale data can be written back to the filesystem as metadata in the recovery phase. To avoid this, when we failed to write out metadata buffers, abort the journal before writing the commit record. We can also avoid this kind of corruption by using the journal checksum feature because it can detect invalid metadata blocks in the journal and avoid them from being replayed. So we don't need to care about asynchronous commit record writeout with a checksum. Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-10-10ext4: Don't reuse released data blocks until transaction commitsAneesh Kumar K.V
We need to make sure we don't reuse the data blocks released during the transaction untill the transaction commits. We force this mode only for ordered and journalled mode. Writeback mode already don't provided data consistency. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-10-16ext4: Use an rbtree for tracking blocks freed during transaction.Aneesh Kumar K.V
With this patch we track the block freed during a transaction using red-black tree. We also make sure contiguous blocks freed are collected in one node in the tree. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-10-10ext4: Do mballoc init before doing filesystem recoveryAneesh Kumar K.V
During filesystem recovery we may be doing a truncate which expects some of the mballoc data structures to be initialized. So do ext4_mb_init before recovery. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-10-13ext4: Free ext4_prealloc_space using kmem_cache_freeAneesh Kumar K.V
We should use kmem_cache_free to free memory allocated via kmem_cache_alloc Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-10-13ext4: Fix Kconfig typo for ext4devManish Katiyar
Looks like there is one more instance where ext4dev should be changed to ext4 because the module name will be "ext4" unless EXT4DEV_COMPAT is selected. Signed-off-by: Manish Katiyar <mkatiyar@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-10-17ext4: Remove an old reference to ext4dev in Makefile commentMartin Michlmayr
Remove an old reference to ext4dev. Signed-off-by: Martin Michlmayr <tbm@cyrius.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-10-10ext4: Rename ext4dev to ext4Theodore Ts'o
The ext4 filesystem is getting stable enough that it's time to drop the "dev" prefix. Also remove the requirement for the TEST_FILESYS flag. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-10-10NFS: fix nfs_parse_ip_address() corner caseChuck Lever
Bruce observed that nfs_parse_ip_address() will successfully parse an IPv6 address that looks like this: "::1%" A scope delimiter is present, but there is no scope ID following it. This is harmless, as it would simply set the scope ID to zero. However, in some cases we would like to flag this as an improperly formed address. We are now also careful to reject addresses where garbage follows the address (up to the length of the string), instead of ignoring the non-address characters; and where the scope ID is nonsense (not a valid device name, but also not numeric). Before, both of these cases would result in a harmless zero scope ID. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-10-10NFS: Cleanup nfs_set_portJ. Bruce Fields
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-10-10Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm: dlm: choose better identifiers dlm: remove bkl dlm: fix address compare dlm: fix locking of lockspace list in dlm_scand dlm: detect available userspace daemon dlm: allow multiple lockspace creates
2008-10-10Fix barrier fail detection in XFSChristoph Hellwig
Currently we disable barriers as soon as we get a buffer in xlog_iodone that has the XBF_ORDERED flag cleared. But this can be the case not only for buffers where the barrier failed, but also the first buffer of a split log write in case of a log wraparound. Due to the disabled barriers we can easily get directory corruption on unclean shutdowns. So instead of using this check add a new buffer flag for failed barrier writes. This is a regression vs 2.6.26 caused by patch to use the right macro to check for the ORDERED flag, as we previously got true returned for every buffer. Thanks to Toei Rei for reporting the bug. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Eric Sandeen <sandeen@sandeen.net> Reviewed-by: David Chinner <david@fromorbit.com> Signed-off-by: Tim Shimmin <tes@sgi.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-10Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmwLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw: GFS2: Support for I/O barriers GFS2: Add UUID to GFS2 sb GFS2: high time to take some time over atime GFS2: The war on bloat GFS2: GFS2 will panic if you misspell any mount options GFS2: Direct IO write at end of file error GFS2: Use an IS_ERR test rather than a NULL test GFS2: Fix race relating to glock min-hold time GFS2: Fix & clean up GFS2 rename GFS2: rm on multiple nodes causes panic GFS2: Fix metafs mounts GFS2: Fix debugfs glock file iterator
2008-10-10Merge branch 'for-2.6.28' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-2.6.28' of git://git.kernel.dk/linux-2.6-block: (132 commits) doc/cdrom: Trvial documentation error, file not present block_dev: fix kernel-doc in new functions block: add some comments around the bio read-write flags block: mark bio_split_pool static block: Find bio sector offset given idx and offset block: gendisk integrity wrapper block: Switch blk_integrity_compare from bdev to gendisk block: Fix double put in blk_integrity_unregister block: Introduce integrity data ownership flag block: revert part of d7533ad0e132f92e75c1b2eb7c26387b25a583c1 bio.h: Remove unused conditional code block: remove end_{queued|dequeued}_request() block: change elevator to use __blk_end_request() gdrom: change to use __blk_end_request() memstick: change to use __blk_end_request() virtio_blk: change to use __blk_end_request() blktrace: use BLKTRACE_BDEV_SIZE as the name size for setup structure block: add lld busy state exporting interface block: Fix blk_start_queueing() to not kick a stopped queue include blktrace_api.h in headers_install ...
2008-10-10proc: remove kernel.maps_protectAlexey Dobriyan
After commit 831830b5a2b5d413407adf380ef62fe17d6fcbf2 aka "restrict reading from /proc/<pid>/maps to those who share ->mm or can ptrace" sysctl stopped being relevant because commit moved security checks from ->show time to ->start time (mm_for_maps()). Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Kees Cook <kees.cook@canonical.com>
2008-10-10proc: remove now unneeded ADDBUF macroAlexey Dobriyan
After local seq_file conversion it was forgotten. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2008-10-10[PATCH] proc: show personality via /proc/pid/personalityKees Cook
Make process personality flags visible in /proc. Since a process's personality is potentially sensitive (e.g. READ_IMPLIES_EXEC), make this file only readable by the process owner. Signed-off-by: Kees Cook <kees.cook@canonical.com> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2008-10-10[PATCH] signal, procfs: some lock_task_sighand() users do not need ↵Lai Jiangshan
rcu_read_lock() lock_task_sighand() make sure task->sighand is being protected, so we do not need rcu_read_lock(). [ exec() will get task->sighand->siglock before change task->sighand! ] But code using rcu_read_lock() _just_ to protect lock_task_sighand() only appear in procfs. (and some code in procfs use lock_task_sighand() without such redundant protection.) Other subsystem may put lock_task_sighand() into rcu_read_lock() critical region, but these rcu_read_lock() are used for protecting "for_each_process()", "find_task_by_vpid()" etc. , not for protecting lock_task_sighand(). Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> [ok from Oleg] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2008-10-10proc: move PROC_PAGE_MONITOR to fs/proc/KconfigAlexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2008-10-10proc: make grab_header() staticAdrian Bunk
Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2008-10-10proc: remove unused get_dma_list()Alexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2008-10-10proc: remove dummy vmcore_open()Alexey Dobriyan
Empty ->open is equivalent to always succeeding ->open. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2008-10-10proc: proc_sys_root tweakAlexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2008-10-10proc: fix return value of proc_reg_open() in "too late" caseAlexey Dobriyan
If ->open() wasn't called, returning 0 is misleading and, theoretically, oopsable: 1) remove_proc_entry clears ->proc_fops, drops lock, 2) ->open "succeeds", 3) ->release oopses, because it assumes ->open was called (single_release()). Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2008-10-09Don't allow splice() to files opened with O_APPENDLinus Torvalds
This is debatable, but while we're debating it, let's disallow the combination of splice and an O_APPEND destination. It's not entirely clear what the semantics of O_APPEND should be, and POSIX apparently expects pwrite() to ignore O_APPEND, for example. So we could make up any semantics we want, including the old ones. But Miklos convinced me that we should at least give it some thought, and that accepting writes at arbitrary offsets is wrong at least for IS_APPEND() files (which always have O_APPEND set, even if the reverse isn't true: you can obviously have O_APPEND set on a regular file). So disallow O_APPEND entirely for now. I doubt anybody cares, and this way we have one less gray area to worry about. Reported-and-argued-for-by: Miklos Szeredi <miklos@szeredi.hu> Acked-by: Jens Axboe <ens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-09NFS: Fix attribute updatesTrond Myklebust
This fixes a regression seen when running the Connectathon testsuite against an ext3 filesystem. The reason was that the inode was constantly being marked as 'just updated' by the jiffy wraparound test. This again meant that newer GETATTR calls were failing to pass the nfs_inode_attrs_need_update() test unless the changes caused a ctime update on the server, since they were perceived as having been started before the latest inode update. Given that nfs_inode_attrs_need_update() already checks for wraparound of nfsi->last_updated, we can drop the buggy "protection" in nfs_update_inode(). Also make a slight micro-optimisation of nfs_inode_attrs_need_update(): we are more often going to see time_after(fattr->time_start, nfsi->last_updated) be true, rather than seeing an update of ctime/size, so put that test first to ensure that we optimise away the ctime/size tests. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-10-09block_dev: fix kernel-doc in new functionsRandy Dunlap
Fix kernel-doc in new functions: Error(mmotm-2008-1002-1617//fs/block_dev.c:895): duplicate section name 'Description' Error(mmotm-2008-1002-1617//fs/block_dev.c:924): duplicate section name 'Description' Warning(mmotm-2008-1002-1617//fs/block_dev.c:1282): No description found for parameter 'pathname' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> cc: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: mark bio_split_pool staticDenis ChengRq
Since all bio_split calls refer the same single bio_split_pool, the bio_split function can use bio_split_pool directly instead of the mempool_t parameter; then the mempool_t parameter can be removed from bio_split param list, and bio_split_pool is only referred in fs/bio.c file, can be marked static. Signed-off-by: Denis ChengRq <crquan@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: Find bio sector offset given idx and offsetMartin K. Petersen
Helper function to find the sector offset in a bio given bvec index and page offset. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: Introduce integrity data ownership flagMartin K. Petersen
A filesystem might supply its own integrity metadata. Introduce a flag that indicates whether the filesystem or the block layer owns the integrity buffer. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: revert part of d7533ad0e132f92e75c1b2eb7c26387b25a583c1Jens Axboe
We need bdev_get_integrity() to support the pending md/dm patches. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: cleanup some of the integrity stuff in blkdev.hJens Axboe
Don't put functions that are only used in fs/bio-integrity.c in blkdev.h, it's much cleaner to just keep it in there. Also kill completely unused bdev_get_tag_size() Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: add bio_kmalloc()Jens Axboe
Not all callers need (or want!) the mempool backing guarentee, it essentially means that you can only use bio_alloc() for short allocations and not for preallocating some bio's at setup or init time. So add bio_kmalloc() which does the same thing as bio_alloc(), except it just uses kmalloc() as the backing instead of the bio mempools. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09Call flush_disk() after detecting an online resize.Andrew Patterson
We call flush_disk() to make sure the buffer cache for the disk is flushed after a disk resize. There are two resize cases, growing and shrinking. Given that users can shrink/then grow a disk before revalidate_disk() is called, we treat the grow case identically to shrinking. We need to flush the buffer cache after an online shrink because, as James Bottomley puts it, The two use cases for shrinking I can see are 1. planned: the fs is already shrunk to within the new boundaries and all data is relocated, so invalidate is fine (any dirty buffers that might exist in the shrunk region are there only because they were relocated but not yet written to their original location). 2. unplanned: In this case, the fs is probably toast, so whether we invalidate or not isn't going to make a whole lot of difference; it's still going to try to read or write from sectors beyond the new size and get I/O errors. Immediately invalidating shrunk disks will cause errors for outstanding I/Os for reads/write beyond the new end of the disk to be generated earlier then if we waited for the normal buffer cache operation. It also removes a potential security hole where we might keep old data around from beyond the end of the shrunk disk if the disk was not invalidated. Signed-off-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09Added flush_disk to factor out common buffer cache flushing code.Andrew Patterson
We need to be able to flush the buffer cache for for more than just when a disk is changed, so we factor out common cache flush code in check_disk_change() to an internal flush_disk() routine. This routine will then be used for both disk changes and disk resizes (in a later patch). Include the disk name in the text indicating that there are busy inodes on the device and increase the KERN severity of the message. Signed-off-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09Check for device resize when rescanning partitionsAndrew Patterson
Check for device resize in the rescan_partitions() routine. If the device has been resized, the bdev size is set to match. The rescan_partitions() routine is called when opening the device and when calling the BLKRRPART ioctl. Signed-off-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09Adjust block device size after an online resize of a disk.Andrew Patterson
The revalidate_disk routine now checks if a disk has been resized by comparing the gendisk capacity to the bdev inode size. If they are different (usually because the disk has been resized underneath the kernel) the bdev inode size is adjusted to match the capacity. Signed-off-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09Wrapper for lower-level revalidate_disk routines.Andrew Patterson
This is a wrapper for the lower-level revalidate_disk call-backs such as sd_revalidate_disk(). It allows us to perform pre and post operations when calling them. We will use this wrapper in a later patch to adjust block device sizes after an online resize (a _post_ operation). Signed-off-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: make blk_rq_map_user take a NULL user-space bufferFUJITA Tomonori
This patch changes blk_rq_map_user to accept a NULL user-space buffer with a READ command if rq_map_data is not NULL. Thus a caller can pass page frames to lk_rq_map_user to just set up a request and bios with page frames propely. bio_uncopy_user (called via blk_rq_unmap_user) doesn't copy data to user space with such request. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09bio: convert bio_copy_kern to use bio_copy_userFUJITA Tomonori
bio_copy_kern and bio_copy_user are very similar. This converts bio_copy_kern to use bio_copy_user. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: introduce struct rq_map_data to use reserved pagesFUJITA Tomonori
This patch introduces struct rq_map_data to enable bio_copy_use_iov() use reserved pages. Currently, bio_copy_user_iov allocates bounce pages but drivers/scsi/sg.c wants to allocate pages by itself and use them. struct rq_map_data can be used to pass allocated pages to bio_copy_user_iov. The current users of bio_copy_user_iov simply passes NULL (they don't want to use pre-allocated pages). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Douglas Gilbert <dougg@torque.net> Cc: Mike Christie <michaelc@cs.wisc.edu> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: add gfp_mask argument to blk_rq_map_user and blk_rq_map_user_iovFUJITA Tomonori
Currently, blk_rq_map_user and blk_rq_map_user_iov always do GFP_KERNEL allocation. This adds gfp_mask argument to blk_rq_map_user and blk_rq_map_user_iov so sg can use it (sg always does GFP_ATOMIC allocation). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Douglas Gilbert <dougg@torque.net> Cc: Mike Christie <michaelc@cs.wisc.edu> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>