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2008-07-09SUNRPC: Use only rpcbind v2 for AF_INET requestsChuck Lever
Some server vendors support the higher versions of rpcbind only for AF_INET6. The kernel doesn't need to use v3 or v4 for AF_INET anyway, so change the kernel's rpcbind client to query AF_INET servers over rpcbind v2 only. This has a few interesting benefits: 1. If the rpcbind request is going over TCP, and the server doesn't support rpcbind versions 3 or 4, the client reduces by two the number of ephemeral ports left in TIME_WAIT for each rpcbind request. This will help during NFS mount storms. 2. The rpcbind interaction with servers that don't support rpcbind versions 3 or 4 will use less network traffic. Also helpful during mount storms. 3. We can eliminate the kernel build option that controls whether the kernel's rpcbind client uses rpcbind version 3 and 4 for AF_INET servers. Less complicated kernel configuration... Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09nfs4: fix potential race with rapid nfs_callback_up/down cycleJeff Layton
If the nfsv4 callback thread is rapidly brought up and down, it's possible that nfs_callback_svc might never get a chance to run. If this happens, the cleanup at thread exit might never occur, throwing the refcounting off and nfs_callback_info in an incorrect state. Move the clean functions into nfs_callback_down. Also change the nfs_callback_info struct to track the svc_rqst rather than svc_serv since we need to know that to call svc_exit_thread. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09nfs4: remove BKL from nfs_callback_up and nfs_callback_downJeff Layton
The nfs_callback_mutex is sufficient protection. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09nfs: initialize timeout variable in nfs4_proc_setclientid_confirmBenny Halevy
gcc (4.3.0) rightfully warns about this: /usr0/export/dev/bhalevy/git/linux-pnfs-bh-nfs41/fs/nfs/nfs4proc.c: In function ‘nfs4_proc_setclientid_confirm’: /usr0/export/dev/bhalevy/git/linux-pnfs-bh-nfs41/fs/nfs/nfs4proc.c:2936: warning: ‘timeout’ may be used uninitialized in this function nfs4_delay that's passed a pointer to 'timeout' is looking at its value and sets it up to some value in the range: NFS4_POLL_RETRY_MIN..NFS4_POLL_RETRY_MAX if (*timeout <= 0) *timeout = NFS4_POLL_RETRY_MIN; if (*timeout > NFS4_POLL_RETRY_MAX) *timeout = NFS4_POLL_RETRY_MAX; Therefore it will end up set to some sane, though rather indeterministic, value. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: handle interface identifiers in incoming IPv6 addressesChuck Lever
Add support in the kernel NFS client's address parser for interface identifiers. IPv6 link-local addresses require an additional "interface identifier", which is a network device name or an integer that indexes the array of local network interfaces. They are suffixed to the address with a '%'. For example: fe80::215:c5ff:fe3b:e1b2%2 indicates an interface index of 2. Or fe80::215:c5ff:fe3b:e1b2%eth0 indicates that requests should be routed through the eth0 device. Without the interface ID, link-local addresses are not usable for NFS. Both the kernel NFS client mount option parser and the mount.nfs command can take either form. The mount.nfs command always passes the address through getnameinfo(3), which usually re-writes interface indices as device names. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Add string length argument to nfs_parse_server_addressChuck Lever
To make nfs_parse_server_address() more generally useful, allow it to accept input strings that are not terminated with '\0'. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Support raw IPv6 address hostnames during NFS mount operationChuck Lever
Traditionally the mount command has looked for a ":" to separate the server's hostname from the export path in the mounted on device name, like this: mount server:/export /mounted/on/dir The server's hostname is "server" and the export path is "/export". You can also substitute a specific IPv4 network address for the server hostname, like this: mount 192.168.0.55:/export /mounted/on/dir Raw IPv6 addresses present a problem, however, because they look something like this: fe80::200:5aff:fe00:30b Note the use of colons. To get around the presence of colons, copy the Solaris convention used for mounting IPv6 servers by address: wrap a raw IPv6 address with square brackets. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Use common device name parsing logic for NFSv4 and NFSv2/v3Chuck Lever
To support passing a raw IPv6 address as a server hostname, we need to expand the logic that handles splitting the passed-in device name into a server hostname and export path Start by pulling device name parsing out of the mount option validation functions and into separate helper functions. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Fix a dependency on CONFIG_NFS_V4 in nfs_remountTrond Myklebust
Fix the 'nfs4_fs_type' undeclared error in nfs_remount when compiling sans NFSv4... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Jeff Layton <jlayton@redhat.com>
2008-07-09NFS: Allow redirtying of a completed unstable write.Trond Myklebust
Currently, if an unstable write completes, we cannot redirty the page in order to reflect a new change in the page data until after we've sent a COMMIT request. This patch allows a page rewrite to proceed without the unnecessary COMMIT step, putting it immediately back onto the dirty page list, undoing the VM unstable write accounting, and removing the NFS_PAGE_TAG_COMMIT tag from the NFS radix tree. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Clean up nfs_update_request()Trond Myklebust
Simplify the loop in nfs_update_request by moving into a separate function the code that attempts to update an existing cached NFS write. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: missing newline in NFS mount debugging messageChuck Lever
Clean up. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Treat "intr" and "nointr" options as deprecatedChuck Lever
Clean up: the "intr" and "nointr" mount options were recently retired. Document this in the NFS mount option parser. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Allow any value for the "retry" optionChuck Lever
The kernel NFS mount option parser should ignore the retry= mount option since it is meaningful only in user space. Today it expects a number rather than arbitrary text, so it ignores the option if the value is numeric, but chokes if there are other characters in the value. Change it to allow any text (except ",") as its value. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Ensure we zap only the access and acl caches when setting new aclsTrond Myklebust
...and ensure that we obey the NFS_INO_INVALID_ACL flag when retrieving the acls. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Fix a warning in nfs4_async_handle_errorTrond Myklebust
We're not modifying the nfs_server when we call nfs_inc_server_stats and friends, so allow the compiler to pass 'const' pointers too. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Move fs/nfs/iostat.h to include/linuxChuck Lever
The fs/nfs/iostat.h header has definitions that were designed to be exposed to user space. Move these definitions under include/linux so user space can use the definitions in applications that read /proc/self/mountstats. Also address a handful of coding style issues called out by checkpatch.pl in fs/nfs/iostat.h. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Remove the redundant file_open entry from struct nfs_rpc_opsTrond Myklebust
All instances are set to nfs_open(), so we should just remove the redundant indirection. Ditto for the file_release op Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Fix the ftruncate() credential problemTrond Myklebust
ftruncate() access checking is supposed to be performed at open() time, just like reads and writes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09rpc: bring back cl_chattyOlga Kornievskaia
The cl_chatty flag alows us to control whether a given rpc client leaves "server X not responding, timed out" messages in the syslog. Such messages make sense for ordinary nfs clients (where an unresponsive server means applications on the mountpoint are probably hanging), but not for the callback client (which can fail more commonly, with the only result just of disabling some optimizations). Previously cl_chatty was removed, do to lack of users; reinstate it, and use it for the nfsd's callback client. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: implement option checking when remounting NFS filesystems (resend)Jeff Layton
When remounting an NFS or NFS4 filesystem, the new NFS options are not respected, yet the remount will still return success. This patch adds a remount_fs sb op for NFS that checks any new nfs mount options against the existing ones and fails the mount if any have changed. This is only implemented for string-based mount options since doing this with binary options isn't really feasible. This is essentially the same as the original patch I sent out, but adds a check to see if the addr= option has changed. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09fs/nfs/nfsroot.c: remove CVS keywordAdrian Bunk
This patch removes a CVS keyword that wasn't updated for a long time from a comment. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Fix trace debugging nits in write.cChuck Lever
Clean up: fix a few dprintk messages that still need to show the RPC task ID correctly, and be sure we use the preferred %lld or %llu instead of %Ld or %Lu. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Use NFSDBG_FILE for all fopsChuck Lever
Clean up: some fops use NFSDBG_FILE, some use NFSDBG_VFS. Let's use NFSDBG_FILE for all fops, and consistently report file names instead of inode numbers. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Add debugging facility for NFS aopsChuck Lever
Recent work in fs/nfs/file.c neglected to add appropriate trace debugging for the NFS client's address space operations. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Make nfs_open methods consistentChuck Lever
Clean up: Report the same debugging info and count function calls the same for files and directories in nfs_opendir() and nfs_file_open(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Make nfs_llseek methods consistentChuck Lever
Clean up: Report the same debugging info in nfs_llseek_dir() and nfs_llseek_file(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Make nfs_fsync methods consistentChuck Lever
Clean up: Report the same debugging info, count function calls the same, and use similar function naming in nfs_fsync_dir() and nfs_fsync(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Update help text for CONFIG_NFS_FSChuck Lever
Clean up: refresh the help text for Kconfig items related to the NFS client. Remove obsolete URLs, and make the language consistent among the options. Also move the ROOT_NFS config option next to the options related to the NFS client. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: do_setlk(): don't flush caches when we have a delegationTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Revert commit 44dd151dTrond Myklebust
Revert commit 44dd151d "NFS: Don't mark a written page as uptodate until it is on disk". While it is true that the write may fail, that is always the case. There is no reason why we should treat data on pages that are not already marked as PG_uptodate as being special. The only thing we gain is a noticeable slowdown when re-reading these pages. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Optimise append writes with holesTrond Myklebust
If a file is being extended, and we're creating a hole, we might as well declare the entire page to be up to date. This patch significantly improves the write performance for sparse files in the case where lseek(SEEK_END) is used to append several non-contiguous writes at intervals of < PAGE_SIZE. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Add correct bounds checking to NFSv2 locksTrond Myklebust
NFSv2 file locking currently fails the Connectathon tests, because the calls to the VFS locking code do not return an EINVAL error if the struct file_lock overflows the 32-bit boundaries. The problem is due to the fact that we occasionally call helpers from fs/locks.c in order to avoid RPC calls to the server when we know that a local process holds the lock. These helpers are, of course, always 64-bit enabled, so EINVAL is not returned in cases when it would if the call had gone to the NLM code. For consistency, we therefore add support for a bounds-checking helper. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Fix a preemption count leak in nfs_update_requestTrond Myklebust
The commit 2785259631697ebb0749a3782cca206e2e542939 (nfs: use GFP_NOFS preloads for radix-tree insertion) appears to have introduced a bug: We only want to call radix_tree_preload() once after creating a request. Calling it every time we loop after we created the request, will cause preemption count leaks. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Nick Piggin <npiggin@suse.de>
2008-07-09NFS: Reduce the stack usage in NFSv3 create operationsTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Reduce the stack usage in NFSv4 create operationsTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-08Merge branch 'hotfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6Linus Torvalds
* 'hotfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: SUNRPC: Fix an rpcbind breakage for the case of IPv6 lookups SUNRPC: Fix a double-free in rpcbind NFS: Fix readdir cache invalidation
2008-07-08reiserfs: discard prealloc in reiserfs_delete_inodeJeff Mahoney
With the removal of struct file from the xattr code, reiserfs_file_release() isn't used anymore, so the prealloc isn't discarded. This causes hangs later down the line. This patch adds it to reiserfs_delete_inode. In most cases it will be a no-op due to it already having been called, but will avoid hangs with xattrs. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-08NFS: Fix readdir cache invalidationTrond Myklebust
invalidate_inode_pages2_range() takes page offset arguments, not byte ranges. Another thought is that individual pages might perhaps get evicted by VM pressure, in which case we might perhaps want to re-read not only the evicted page, but all subsequent pages too (in case the server returns more/less data per page so that the alignment of the next entry changes). We should therefore remove the condition that we only do this on page->index==0. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-05Fix pagemap_read() use of struct mm_walkAndrew Morton
Fix some issues in pagemap_read noted by Alexey: - initialize pagemap_walk.mm to "mm" , so the code starts working as advertised - initialize ->private to "&pm" so it wouldn't immediately oops in pagemap_pte_hole() - unstatic struct pagemap_walk, so two threads won't fsckup each other (including those started by root, including flipping ->mm when you don't have permissions) - pagemap_read() contains two calls to ptrace_may_attach(), second one looks unneeded. - avoid possible kmalloc(0) and integer wraparound. Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> [ Personally, I'd just remove the functionality entirely - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-05Fix clear_refs_write() use of struct mm_walkAndrew Morton
Don't use a static entry, so as to prevent races during concurrent use of this function. Reported-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04security: filesystem capabilities: fix fragile setuid fixup codeAndrew G. Morgan
This commit includes a bugfix for the fragile setuid fixup code in the case that filesystem capabilities are supported (in access()). The effect of this fix is gated on filesystem capability support because changing securebits is only supported when filesystem capabilities support is configured.) [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Andrew G. Morgan <morgan@kernel.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04add kernel-doc for simple_read_from_buffer and memory_read_from_bufferAkinobu Mita
Add kernel-doc comments describing simple_read_from_buffer and memory_read_from_buffer. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Christoph Hellwig <hch@lst.de> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04ntfs: update help textJess Guerrero
The url in the help text for ntfs should be updated. Acked-by: Anton Altaparmakov <aia21@cantab.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04ecryptfs: remove unnecessary mux from ecryptfs_init_ecryptfs_miscdev()Michael Halcrow
The misc_mtx should provide all the protection required to keep the daemon hash table sane during miscdev registration. Since this mutex is causing gratuitous lockdep warnings, this patch removes it. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Reported-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04reiserfs: add missing unlock to an error path in reiserfs_quota_write()Jan Kara
When write in reiserfs_quota_write() fails, we have to properly release i_mutex. One error path has been missing the unlock... Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04ext4: add missing unlock to an error path in ext4_quota_write()Jan Kara
When write in ext4_quota_write() fails, we have to properly release i_mutex. One error path has been missing the unlock... Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04ext3: add missing unlock to error path in ext3_quota_write()Jan Kara
When write in ext3_quota_write() fails, we have to properly release i_mutex. One error path has been missing the unlock... Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-039p: fix O_APPEND in legacy modeEric Van Hensbergen
The legacy protocol's open operation doesn't handle an append operation (it is expected that the client take care of it). We were incorrectly passing the extended protocol's flag through even in legacy mode. This was reported in bugzilla report #10689. This patch fixes the problem by disallowing extended protocol open modes from being passed in legacy mode and implemented append functionality on the client side by adding a seek after the open. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2008-07-01Properly notify block layer of sync writesJens Axboe
fsync_buffers_list() and sync_dirty_buffer() both issue async writes and then immediately wait on them. Conceptually, that makes them sync writes and we should treat them as such so that the IO schedulers can handle them appropriately. This patch fixes a write starvation issue that Lin Ming reported, where xx is stuck for more than 2 minutes because of a large number of synchronous IO in the system: INFO: task kjournald:20558 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kjournald D ffff810010820978 6712 20558 2 ffff81022ddb1d10 0000000000000046 ffff81022e7baa10 ffffffff803ba6f2 ffff81022ecd0000 ffff8101e6dc9160 ffff81022ecd0348 000000008048b6cb 0000000000000086 ffff81022c4e8d30 0000000000000000 ffffffff80247537 Call Trace: [<ffffffff803ba6f2>] kobject_get+0x12/0x17 [<ffffffff80247537>] getnstimeofday+0x2f/0x83 [<ffffffff8029c1ac>] sync_buffer+0x0/0x3f [<ffffffff8066d195>] io_schedule+0x5d/0x9f [<ffffffff8029c1e7>] sync_buffer+0x3b/0x3f [<ffffffff8066d3f0>] __wait_on_bit+0x40/0x6f [<ffffffff8029c1ac>] sync_buffer+0x0/0x3f [<ffffffff8066d48b>] out_of_line_wait_on_bit+0x6c/0x78 [<ffffffff80243909>] wake_bit_function+0x0/0x23 [<ffffffff8029e3ad>] sync_dirty_buffer+0x98/0xcb [<ffffffff8030056b>] journal_commit_transaction+0x97d/0xcb6 [<ffffffff8023a676>] lock_timer_base+0x26/0x4b [<ffffffff8030300a>] kjournald+0xc1/0x1fb [<ffffffff802438db>] autoremove_wake_function+0x0/0x2e [<ffffffff80302f49>] kjournald+0x0/0x1fb [<ffffffff802437bb>] kthread+0x47/0x74 [<ffffffff8022de51>] schedule_tail+0x28/0x5d [<ffffffff8020cac8>] child_rip+0xa/0x12 [<ffffffff80243774>] kthread+0x0/0x74 [<ffffffff8020cabe>] child_rip+0x0/0x12 Lin Ming confirms that this patch fixes the issue. I've run tests with it for the past week and no ill effects have been observed, so I'm proposing it for inclusion into 2.6.26. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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