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2009-10-01const: constify remaining file_operationsAlexey Dobriyan
[akpm@linux-foundation.org: fix KVM] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-24headers: utsname.h reduxAlexey Dobriyan
* remove asm/atomic.h inclusion from linux/utsname.h -- not needed after kref conversion * remove linux/utsname.h inclusion from files which do not need it NOTE: it looks like fs/binfmt_elf.c do not need utsname.h, however due to some personality stuff it _is_ needed -- cowardly leave ELF-related headers and files alone. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-23Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: (85 commits) ocfs2: Use buffer IO if we are appending a file. ocfs2: add spinlock protection when dealing with lockres->purge. dlmglue.c: add missed mlog lines ocfs2: __ocfs2_abort() should not enable panic for local mounts ocfs2: Add ioctl for reflink. ocfs2: Enable refcount tree support. ocfs2: Implement ocfs2_reflink. ocfs2: Add preserve to reflink. ocfs2: Create reflinked file in orphan dir. ocfs2: Use proper parameter for some inode operation. ocfs2: Make transaction extend more efficient. ocfs2: Don't merge in 1st refcount ops of reflink. ocfs2: Modify removing xattr process for refcount. ocfs2: Add reflink support for xattr. ocfs2: Create an xattr indexed block if needed. ocfs2: Call refcount tree remove process properly. ocfs2: Attach xattr clusters to refcount tree. ocfs2: Abstract ocfs2 xattr tree extend rec iteration process. ocfs2: Abstract the creation of xattr block. ocfs2: Remove inode from ocfs2_xattr_bucket_get_name_value. ...
2009-09-23seq_file: constify seq_operationsJames Morris
Make all seq_operations structs const, to help mitigate against revectoring user-triggerable function pointers. This is derived from the grsecurity patch, although generated from scratch because it's simpler than extracting the changes from there. Signed-off-by: James Morris <jmorris@namei.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Acked-by: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-23ocfs2: add spinlock protection when dealing with lockres->purge.Wengang Wang
when we check/modify lockres->purge, we should with the protection of lockres->spinlock. in dlm_purge_lockres(), the checking/modifying is not with the protectin. this patch fixes it. Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-11writeback: add name to backing_dev_infoJens Axboe
This enables us to track who does what and print info. Its main use is catching dirty inodes on the default_backing_dev_info, so we can fix that up. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-08-21ocfs2/dlm: Wait on lockres instead of erroring cancel requestsGoldwyn Rodrigues
In case a downconvert is queued, and a flock receives a signal, BUG_ON(lockres->l_action != OCFS2_AST_INVALID) is triggered because a lock cancel triggers a dlmunlock while an AST is scheduled. To avoid this, allow a LKM_CANCEL to pass through, and let it wait on __dlm_wait_on_lockres(). Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de> Acked-off-by: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-07-31ocfs2: Remove redundant BUG_ON in __dlm_queue_ast()Goldwyn Rodrigues
We BUG_ON() the same thing twice. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-07-08ocfs2: trivial fix for s/migrate/migration/ in dlmrecovery.c loggingJeff Liu
in dlmrecovery.c:1121, replace 'migrate' to 'migration' to keep the consistency by comparing to other lines with the similar log info in the same file. Signed-off-by: Jeff Liu <jeff.liu@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-04-03ocfs2/dlm: Tweak mle_state outputSunil Mushran
The debugfs file, mle_state, now prints the number of largest number of mles in one hash link. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: Do not purge lockres that is being migrated dlm_purge_lockres()Sunil Mushran
This patch attempts to fix a fine race between purging and migration. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: Remove struct dlm_lock_name in struct dlm_master_list_entrySunil Mushran
This patch removes struct dlm_lock_name and adds the entries directly to struct dlm_master_list_entry. Under the new scheme, both mles that are backed by a lockres or not, will have the name populated in mle->mname. This allows us to get rid of code that was figuring out the location of the mle name. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: Show the number of lockres/mles in dlm_stateSunil Mushran
This patch shows the number of lockres' and mles in the debugfs file, dlm_state. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: dlm_set_lockres_owner() and dlm_change_lockres_owner() inlinedSunil Mushran
This patch inlines dlm_set_lockres_owner() and dlm_change_lockres_owner(). Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: Improve lockres countsSunil Mushran
This patch replaces the lockres counts that tracked the number number of locally and remotely mastered lockres' with a current and total count. The total count is the number of lockres' that have been created since the dlm domain was created. The number of locally and remotely mastered counts can be computed using the locking_state output. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: Track number of mlesSunil Mushran
The lifetime of a mle is limited to the duration of the lockres mastery process. While typically this lifetime is fairly short, we have noticed the number of mles explode under certain circumstances. This patch tracks the number of each different types of mles and should help us determine how best to speed up the mastery process. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: Indent dlm_cleanup_master_list()Sunil Mushran
The previous patch explicitly did not indent dlm_cleanup_master_list() so as to make the patch readable. This patch properly indents the function. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: Activate dlm->master_hash for master list entriesSunil Mushran
With this patch, the mles are stored in a hash and not a simple list. This should improve the mle lookup time when the number of outstanding masteries is large. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: Create and destroy the dlm->master_hashSunil Mushran
This patch adds code to create and destroy the dlm->master_hash. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: Refactor dlm_clean_master_list()Sunil Mushran
This patch refactors dlm_clean_master_list() so as to make it easier to convert the mle list to a hash. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: Clean up struct dlm_lock_nameSunil Mushran
For master mle, the name it stored in the attached lockres in struct qstr. For block and migration mle, the name is stored inline in struct dlm_lock_name. This patch attempts to make struct dlm_lock_name look like a struct qstr. While we could use struct qstr, we don't because we want to avoid having to malloc and free the lockname string as the mle's lifetime is fairly short. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-04-03ocfs2/dlm: Encapsulate adding and removing of mle from dlm->master_listSunil Mushran
This patch encapsulates adding and removing of the mle from the dlm->master_list. This patch is part of the series of patches that converts the mle list to a mle hash. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-02-26ocfs2/dlm: Make dlm_assert_master_handler() kill itself instead of the asserterSunil Mushran
In dlm_assert_master_handler(), if we get an incorrect assert master from a node that, we reply with EINVAL asking the asserter to die. The problem is that an assert is sent after so many hoops, it is invariably the node that thinks the asserter is wrong, is actually wrong. So instead of killing the asserter, this patch kills the assertee. This patch papers over a race that is still being addressed. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Acked-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-02-26ocfs2/dlm: Use ast_lock to protect ast_listSunil Mushran
The code was using dlm->spinlock instead of dlm->ast_lock to protect the ast_list. This patch fixes the issue. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Acked-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-02-26ocfs2/dlm: Retract fix for race between purge and migrateSunil Mushran
Mainline commit d4f7e650e55af6b235871126f747da88600e8040 attempts to delay the dlm_thread from sending the drop ref message if the lockres is being migrated. The problem is that we make the dlm_thread wait for the migration to complete. This causes a deadlock as dlm_thread also participates in the lockres migration process. A better fix for the original oss bugzilla#1012 is in testing. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Acked-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-06Merge branch 'upstream-linus' of ↵Linus Torvalds
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: (138 commits) ocfs2: Access the right buffer_head in ocfs2_merge_rec_left. ocfs2: use min_t in ocfs2_quota_read() ocfs2: remove unneeded lvb casts ocfs2: Add xattr support checking in init_security ocfs2: alloc xattr bucket in ocfs2_xattr_set_handle ocfs2: calculate and reserve credits for xattr value in mknod ocfs2/xattr: fix credits calculation during index create ocfs2/xattr: Always updating ctime during xattr set. ocfs2/xattr: Remove extend_trans call and add its credits from the beginning ocfs2/dlm: Fix race during lockres mastery ocfs2/dlm: Fix race in adding/removing lockres' to/from the tracking list ocfs2/dlm: Hold off sending lockres drop ref message while lockres is migrating ocfs2/dlm: Clean up errors in dlm_proxy_ast_handler() ocfs2/dlm: Fix a race between migrate request and exit domain ocfs2: One more hamming code optimization. ocfs2: Another hamming code optimization. ocfs2: Don't hand-code xor in ocfs2_hamming_encode(). ocfs2: Enable metadata checksums. ocfs2: Validate superblock with checksum and ecc. ocfs2: Checksum and ECC for directory blocks. ...
2009-01-05zero i_uid/i_gid on inode allocationAl Viro
... and don't bother in callers. Don't bother with zeroing i_blocks, while we are at it - it's already been zeroed. i_mode is not worth the effort; it has no common default value. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-01-05ocfs2/dlm: Fix race during lockres masterySunil Mushran
dlm_get_lock_resource() is supposed to return a lock resource with a proper master. If multiple concurrent threads attempt to lookup the lockres for the same lockid while the lock mastery in underway, one or more threads are likely to return a lockres without a proper master. This patch makes the threads wait in dlm_get_lock_resource() while the mastery is underway, ensuring all threads return the lockres with a proper master. This issue is known to be limited to users using the flock() syscall. For all other fs operations, the ocfs2 dlmglue layer serializes the dlm op for each lockid. Users encountering this bug will see flock() return EINVAL and dmesg have the following error: ERROR: Dlm error "DLM_BADARGS" while calling dlmlock on resource <LOCKID>: bad api args Reported-by: Coly Li <coyli@suse.de> Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05ocfs2/dlm: Fix race in adding/removing lockres' to/from the tracking listSunil Mushran
This patch adds a new lock, dlm->tracking_lock, to protect adding/removing lockres' to/from the dlm->tracking_list. We were previously using dlm->spinlock for the same, but that proved inadequate as we could be freeing a lockres from a context that did not hold that lock. As the new lock only protects this list, we can explicitly take it when removing the lockres from the tracking list. This bug was exposed when testing multiple processes concurrently flock() the same file. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05ocfs2/dlm: Hold off sending lockres drop ref message while lockres is migratingSunil Mushran
During lockres purge, o2dlm sends a drop reference message to the lockres master. This patch delays the message if the lockres is being migrated. Fixes oss bugzilla#1012 http://oss.oracle.com/bugzilla/show_bug.cgi?id=1012 Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05ocfs2/dlm: Clean up errors in dlm_proxy_ast_handler()Sunil Mushran
Patch cleans printed errors in dlm_proxy_ast_handler(). The errors now includes the node number that sent the (b)ast. Also it reduces the number of endian swaps of the cookie. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05ocfs2/dlm: Fix a race between migrate request and exit domainSunil Mushran
Patch address a racing migrate request message and an exit domain message. Instead of blocking exit domains for the duration of the migrate, we ignore failure to deliver that message. This is because an exiting domain should not have any active locks and thus has no role to play in the migration. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-12-04Merge branch 'master' into nextJames Morris
Conflicts: fs/nfsd/nfs4recover.c Manually fixed above to use new creds API functions, e.g. nfs4_save_creds(). Signed-off-by: James Morris <jmorris@namei.org>
2008-12-01ocfs2: fix return value set in init_dlmfs_fs()Coly Li
In init_dlmfs_fs(), if calling kmem_cache_create() failed, the code will use return value from calling bdi_init(). The correct behavior should be set status as -ENOMEM before going to "bail:". Signed-off-by: Coly Li <coyli@suse.de> Acked-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-12-01ocfs2: comments typo fixColy Li
This patch fixes two typos in comments of ocfs2. Signed-off-by: Coly Li <coyli@suse.de> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-11-13CRED: Wrap task credential accesses in the OCFS2 filesystemDavid Howells
Wrap access to task credentials so that they can be separated more easily from the task_struct during the introduction of COW creds. Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id(). Change some task->e?[ug]id to task_e?[ug]id(). In some places it makes more sense to use RCU directly rather than a convenient wrapper; these will be addressed by later patches. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: James Morris <jmorris@namei.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Acked-by: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <joel.becker@oracle.com> Cc: ocfs2-devel@oss.oracle.com Signed-off-by: James Morris <jmorris@namei.org>
2008-07-26SL*B: drop kmem cache argument from constructorAlexey Dobriyan
Kmem cache passed to constructor is only needed for constructors that are themselves multiplexeres. Nobody uses this "feature", nor does anybody uses passed kmem cache in non-trivial way, so pass only pointer to object. Non-trivial places are: arch/powerpc/mm/init_64.c arch/powerpc/mm/hugetlbpage.c This is flag day, yes. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Christoph Lameter <cl@linux-foundation.org> Cc: Jon Tollefson <kniht@linux.vnet.ibm.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Matt Mackall <mpm@selenic.com> [akpm@linux-foundation.org: fix arch/powerpc/mm/hugetlbpage.c] [akpm@linux-foundation.org: fix mm/slab.c] [akpm@linux-foundation.org: fix ubifs] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-07[PATCH] ocfs2/dlm: Fixes oops in dlm_new_lockres()Sunil Mushran
Patch fixes a race that can result in an oops while adding a lockres to the dlm lockres tracking list. Bug introduced by mainline commit 29576f8bb54045be944ba809d4fca1ad77c94165. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-05-30[PATCH 2/3] ocfs2/dlm: Silence build warningsSunil Mushran
This patch silences the build warnings concerning dlm_debug_init() and friends when building without CONFIG_DEBUG_FS enabled. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-05-01ocfs2/dlm: dlmdebug.c: make 2 functions staticAdrian Bunk
This patch makes the following needlessly global functions static: - stringify_lockname() - dlm_debug_put() Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-30mm: bdi: add separate writeback accounting capabilityMiklos Szeredi
Add a new BDI capability flag: BDI_CAP_NO_ACCT_WB. If this flag is set, then don't update the per-bdi writeback stats from test_set_page_writeback() and test_clear_page_writeback(). Misc cleanups: - convert bdi_cap_writeback_dirty() and friends to static inline functions - create a flag that includes all three dirty/writeback related flags, since almst all users will want to have them toghether Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-18ocfs2: Only build ocfs2/dlm with the o2cb stack moduleMark Fasheh
fs/ocfs2/dlm/ocfs2_dlm.ko and fs/ocfs2/dlm/ocfs2_dlmfs.ko get built if CONFIG_FS_OCFS2 is specified. This isn't quite how it should happen any more - the "o2cb" dlm modules should only be built if CONFIG_FS_OCFS2_O2CB is set, so update the dlm Makefile accordingly. Signed-off-by: Mark Fasheh <mfasheh@suse.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Joel Becker <joel.becker@oracle.com>
2008-04-18ocfs2/dlm: Cleanup lockres printSunil Mushran
A previous patch added KERN_NOTICE to printks printing the lockres that cluttered the output. This patch removes the log level. For people concerned with syslog clutter, please note we now use this facility to print lockres only during an error. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2/dlm: Fix lockname in lockres print functionSunil Mushran
__dlm_print_one_lock_resource was printing lockname incorrectly. Also, we now use printk directly instead of mlog as the latter prints the line context which is not useful for this print. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2/dlm: Move dlm_print_one_mle() from dlmmaster.c to dlmdebug.cSunil Mushran
This patch helps in consolidating debugging related functions in dlmdebug.c. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2/dlm: Dumps the purgelist into a debugfs fileSunil Mushran
This patch dumps all the lockres' on the purgelist it can fit in one page into a debugfs file. Useful for debugging. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2/dlm: Dumps the mles into a debugfs fileSunil Mushran
This patch dumps all mles it can fit in one page into a debugfs file. Useful for debugging. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2/dlm: Move struct dlm_master_list_entry to dlmcommon.hSunil Mushran
This patch moves some mle related definitions from dlmmaster.c to dlmcommon.h. Future patches need these definitions to dump mle debugging information. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.beckeroracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2/dlm: Dumps the lockres' into a debugfs fileSunil Mushran
This patch dumps all the lockres' alongwith all the locks into a debugfs file. Useful for debugging. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2/dlm: Dump the dlm state in a debugfs fileSunil Mushran
This patch dumps the dlm state (dlm_ctxt) into a debugfs file. Useful for debugging. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>