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* [CIFS] DFS build fixesSteve French2008-01-251-4/+8
| | | | | | Also includes a few minor changes suggested by Christoph Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] hold ses sem on tcp session reconnect during mountSteve French2008-01-031-3/+3
| | | | | Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] redo existing session setup if needed in cifs_mountJeff Layton2007-12-311-1/+9
| | | | | | | | | | | | | | | | | | | | | | | When cifs_mount finds an existing SMB session that it can use for a new mount, it does not check to see whether that session is in need of being reconnected. An easy way to reproduce: 1) mount //server/share1 2) watch /proc/fs/cifs/DebugData for the share to go DISCONNECTED 3) mount //server/share2 with same creds as in step 1. The second mount will fail because CIFSTCon returned -EAGAIN. If you do an operation in share1 and then reattempt the mount it will work (since the session is reestablished). The following patch fixes this by having cifs_mount check the status of the session when it picks an existing session and calling cifs_setup_session on it again if it's in need of reconnection. Thanks to Wojciech Pilorz for the initial bug report. Signed-off-by: Jeff Layton <jlayton@tupile.poochiereds.net> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Fix spurious reconnect on 2nd peek from read of SMB lengthPetr Tesarik2007-11-201-3/+3
| | | | | | | | | | | When retrying kernel_recvmsg() because of a short read, check returned length against the remaining length, not against total length. This avoids unneeded session reconnects which would otherwise occur when kernel_recvmsg() finally returns zero when asked to read zero bytes. Signed-off-by: Petr Tesarik <ptesarik@suse.cz> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] minor checkpatch cleanupSteve French2007-11-161-1/+1
| | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] add hostname field to TCP_Server_Info structJeff Layton2007-11-161-0/+36
| | | | | | | ...and populate it with the hostname portion of the UNC string. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] clean up error handling in cifs_mountJeff Layton2007-11-161-58/+30
| | | | | | | | | | | Move all of the kfree's sprinkled in the middle of the function to the end, and have the code set rc and just goto there on error. Also zero out the password string before freeing it. Looks like this should also fix a potential memory leak of the prepath string if an error occurs near the end of the function. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Fix buffer overflow if server sends corrupt response to smallSteve French2007-11-131-4/+5
| | | | | | | | | | | | | | | | | | | request In SendReceive() function in transport.c - it memcpy's message payload into a buffer passed via out_buf param. The function assumes that all buffers are of size (CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) , unfortunately it is also called with smaller (MAX_CIFS_SMALL_BUFFER_SIZE) buffers. There are eight callers (SMB worker functions) which are primarily affected by this change: TreeDisconnect, uLogoff, Close, findClose, SetFileSize, SetFileTimes, Lock and PosixLock CC: Dave Kleikamp <shaggy@austin.ibm.com> CC: Przemyslaw Wegrzyn <czajnik@czajsoft.pl> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [NET]: Add the helper kernel_sock_shutdown()Trond Myklebust2007-11-121-1/+1
| | | | | | | | | | | | | | | ...and fix a couple of bugs in the NBD, CIFS and OCFS2 socket handlers. Looking at the sock->op->shutdown() handlers, it looks as if all of them take a SHUT_RD/SHUT_WR/SHUT_RDWR argument instead of the RCV_SHUTDOWN/SEND_SHUTDOWN arguments. Add a helper, and then define the SHUT_* enum to ensure that kernel users of shutdown() don't get confused. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: Mark Fasheh <mark.fasheh@oracle.com> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CIFS] fix oops on second mount to same server when null auth is usedJeff Layton2007-11-091-1/+1
| | | | | | | | | | | | | | | | | | When a share is mounted using no username, cifs_mount sets volume_info.username as a NULL pointer, and the sesInfo userName as an empty string. The volume_info.username is passed to a couple of other functions to see if there is an existing unc or tcp connection that can be used. These functions assume that the username will be a valid string that can be passed to strncmp. If the pointer is NULL, then the kernel will oops if there's an existing session to which the string can be compared. This patch changes cifs_mount to set volume_info.username to an empty string in this situation, which prevents the oops and should make it so that the comparison to other null auth sessions match. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] If no Access Control Entries, set mode perm bits to zeroSteve French2007-11-011-1/+1
| | | | | | | Also clean up ACL code Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds2007-10-191-123/+139
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: (51 commits) [CIFS] log better errors on failed mounts [CIFS] Return better error when server requires signing but client forbids [CIFS] fix typo [CIFS] acl support part 4 [CIFS] Fix minor problems noticed by scan [CIFS] fix bad handling of EAGAIN error on kernel_recvmsg in cifs_demultiplex_thread [CIFS] build break [CIFS] endian fixes [CIFS] endian fixes in new acl code [CIFS] Fix some endianness problems in new acl code [CIFS] missing #endif from a previous patch [CIFS] formatting fixes [CIFS] Break up unicode_sessetup string functions [CIFS] parse server_GUID in SPNEGO negProt response [CIFS] [CIFS] Fix endian conversion problem in posix mkdir [CIFS] fix build break when lanman not enabled [CIFS] remove two sparse warnings [CIFS] remove compile warnings when debug disabled [CIFS] CIFS ACL support part 3 ...
| * [CIFS] fix bad handling of EAGAIN error on kernel_recvmsg in ↵Steve French2007-10-171-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cifs_demultiplex_thread When kernel_recvmsg returns -EAGAIN or -ERESTARTSYS, then cifs_demultiplex_thread sleeps for a bit and then tries the read again. When it does this, it's not zeroing out the length and that throws off the value of total_read. Fix it to zero out the length. Can cause memory corruption: If kernel_recvmsg returns an error and total_read is a large enough value, then we'll end up going through the loop again. total_read will be a bogus value, as will (pdu_length-total_read). When this happens we end up calling kernel_recvmsg with a bogus value (possibly larger than the current iov_len). At that point, memcpy_toiovec can overrun iov. It will start walking up the stack, casting other things that are there to struct iovecs (since it assumes that it's been passed an array of them). Any pointer on the stack at an address above the kvec is a candidate for corruption here. Many thanks to Ulrich Obergfell for pointing this out. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] formatting fixesCyrill Gorcunov2007-10-161-31/+26
| | | | | | | | | | Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] Fix cifsd so shuts down when signing fails during mountSteve French2007-10-041-1/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes two problems: 1) we dropped down to negotiating lanman if we did not recognize the mechanism (krb5 e.g.) 2) we did not stop cifsd (thus will fail when doing rmod cifs with slab free errors) when we fail tcon but have a bad session (which is the case in which signing is required but we don't allow signing on the client) It also turns on extended security flag in the header when passing "sec=krb5" on mount command (although kerberos support is not done of course) Acked-by: Jeff Layton <jlayton@redhat.com> CC: Shaggy <shaggy@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] remove some redundant argument checksMariusz Kozlowski2007-10-031-14/+8
| | | | | | | | | | | | | | | | | | This patch does kmalloc + memset conversion to kzalloc and removes some redundant argument checks. Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] CIFS support for named pipes (part 1)Steve French2007-09-281-2/+16
| | | | | | | | | | | | | | | | | | | | | | | | This allows cifs to mount to ipc shares (IPC$) which will allow user space applications to layer over authenticated cifs connections (useful for Wine and others that would want to put DCE/RPC over CIFS or run CIFS named pipes) Acked-by: Rob Shearman <rob@codeweavers.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] Support for CIFS ACLs (part 1)Steve French2007-09-241-2/+2
| | | | | | | | | | | | | | | | Add code to be able to dump CIFS ACL information when Query Posix ACL with cifsacl mount parm enabled. Signed-off-by: Shirish Pargoankar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] fix typo in previous commitSteve French2007-09-201-1/+1
| | | | | | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] Add warning message when broken server fails SetFSInfo callSteve French2007-09-201-1/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | A reasonably common NAS server returns an error on the SetFSInfo of the Unix capabilities. Log a message for this alerting the user that the server may have problems with the Unix extensions, and telling them what they can do to workaround it. Unfortunately the server does not return other clues that we could easily use to turn the Unix Extension support off automatically in this case (since they claim to support it). Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] Fix potential NULL pointer usage if kzalloc failsSteve French2007-09-151-5/+8
| | | | | | | | | | | | | | Potential problem was noticed by Cyrill Gorcunov CC: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] typo in earlier cifs_reconnect fixSteve French2007-09-151-1/+0
| | | | | | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] Fix warnings shown by newer version of sparseSteve French2007-08-311-33/+28
| | | | | | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] formatting cleanup found by checkpatchSteve French2007-08-301-28/+20
| | | | | | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] fix for incorrect session reconnectsSteve French2007-08-301-6/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | cifs reconnect could end up happening incorrectly due to the small initial tcp recvmsg response. When the socket was within three bytes of being full and the recvmsg returned only 1 to 3 bytes of the initial 4 byte read of the RFC1001 length field. Fortunately this seems to be less common on more current kernels, but this fixes it so cifs tries to retrieve all 4 bytes of the initial tcp read. Signed-off-by: Shirish Pargoankar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | Use helpers to obtain task pid in printksPavel Emelyanov2007-10-191-1/+1
|/ | | | | | | | | | | | | | | | The task_struct->pid member is going to be deprecated, so start using the helpers (task_pid_nr/task_pid_vnr/task_pid_nr_ns) in the kernel. The first thing to start with is the pid, printed to dmesg - in this case we may safely use task_pid_nr(). Besides, printks produce more (much more) than a half of all the explicit pid usage. [akpm@linux-foundation.org: git-drm went and changed lots of stuff] Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: Dave Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6Steve French2007-07-191-0/+1
|\ | | | | | | | | | | Conflicts: fs/cifs/export.c
| * Freezer: make kernel threads nonfreezable by defaultRafael J. Wysocki2007-07-171-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the freezer treats all tasks as freezable, except for the kernel threads that explicitly set the PF_NOFREEZE flag for themselves. This approach is problematic, since it requires every kernel thread to either set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't care for the freezing of tasks at all. It seems better to only require the kernel threads that want to or need to be frozen to use some freezer-related code and to remove any freezer-related code from the other (nonfreezable) kernel threads, which is done in this patch. The patch causes all kernel threads to be nonfreezable by default (ie. to have PF_NOFREEZE set by default) and introduces the set_freezable() function that should be called by the freezable kernel threads in order to unset PF_NOFREEZE. It also makes all of the currently freezable kernel threads call set_freezable(), so it shouldn't cause any (intentional) change of behaviour to appear. Additionally, it updates documentation to describe the freezing of tasks more accurately. [akpm@linux-foundation.org: build fixes] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | [CIFS] Allow disabling CIFS Unix Extensions as mount optionSteve French2007-07-181-7/+24
| | | | | | | | | | | | | | | | | | Previously the only way to do this was to umount all mounts to that server, turn off a proc setting (/proc/fs/cifs/LinuxExtensionsEnabled). Fixes Samba bugzilla bug number: 4582 (and also 2008) Signed-off-by: Steve French <sfrench@us.ibm.com>
* | [CIFS] More whitespace/formatting fixes (noticed by checkpatch)Steve French2007-07-171-15/+28
| | | | | | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
* | [CIFS] whitespace/formatting fixesSteve French2007-07-131-342/+413
| | | | | | | | | | | | | | | | | | This should be the last big batch of whitespace/formatting fixes. checkpatch warnings for the cifs directory are down about 90% and many of the remaining ones are harder to remove or make the code harder to read. Signed-off-by: Steve French <sfrench@us.ibm.com>
* | [CIFS] whitespace cleanupSteve French2007-07-101-199/+199
| | | | | | | | | | | | More than halfway there Signed-off-by: Steve French <sfrench@us.ibm.com>
* | [CIFS] Fix packet signatures for NTLMv2 caseSteve French2007-07-091-2/+2
| | | | | | | | | | Signed-off-by: Yehuda Sadeh Weinraub <Yehuda.Sadeh@expand.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | [CIFS] whitespace cleanupSteve French2007-06-271-26/+27
| | | | | | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
* | [CIFS] Do not allow signals in cifs_demultiplex_threadJeff2007-06-251-6/+7
| | | | | | | | | | | | | | | | | | Switch from send_sig to force_sig and do not allow signal for this background thread (the signal is needed to wakeup the thread when blocked in the network stack). Signed-off-by: Jeff Layton <jlayton@readhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | [CIFS] Add in some missing flags and cifs README and TODO correctionsSteve French2007-06-241-16/+37
|/ | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] typo in previous patchSteve French2007-05-241-3/+3
| | | | | | (also fixed missing space after if) Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Fix oops on failed cifs mount (in kthread_stop)Steve French2007-05-231-2/+12
| | | | | | | | | | | | | | If the cifs demultiplex thread wakes up and exits (zeroing server->tsk) before kthread_stop is called, the cifs_mount code could pass a null pointer to kthread_stop Thanks to akpm, Dave Young and Shaggy for suggesting earlier versions of this patch. CC: akpm@linux-foundatior.org Signed-off-by: Dave Young <hidave.darkstar@gmail.com> Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Make sec=none force an anonymous mountJeff Layton2007-05-051-4/+4
| | | | | | | | | | | | | | | | We had a customer report that attempting to make CIFS mount with a null username (i.e. doing an anonymous mount) doesn't work. Looking through the code, it looks like CIFS expects a NULL username from userspace in order to trigger an anonymous mount. The mount.cifs code doesn't seem to ever pass a null username to the kernel, however. It looks also like the kernel can take a sec=none option, but it only seems to look at it if the username is already NULL. This seems redundant and effectively makes sec=none useless. The following patch makes sec=none force an anonymous mount. Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Fix oops in reset_cifs_unix_caps on reconnectSteve French2007-05-031-1/+1
| | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] UID/GID override on CIFS mounts to SambaSteve French2007-04-301-36/+43
| | | | | | | | | | | | | | | | | | When CIFS Unix Extensions are negotiated we get the Unix uid and gid owners of the file from the server (on the Unix Query Path Info levels), but if the server's uids don't match the client uid's users were having to disable the Unix Extensions (which turned off features they still wanted). The changeset patch allows users to override uid and/or gid for file/directory owner with a default uid and/or gid specified at mount (as is often done when mounting from Linux cifs client to Windows server). This changeset also displays the uid and gid used by default in /proc/mounts (if applicable). Also cleans up code by adding some of the missing spaces after "if" keywords per-kernel style guidelines (as suggested by Randy Dunlap when he reviewed the patch). Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] prefixpath mounts to servers supporting posix paths used wrong slashSteve French2007-04-261-1/+7
| | | | | Acked-by: Alexander Bokovoy <abokovoy@ru.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Add IPv6 supportSteve French2007-04-251-4/+11
| | | | | | | | | | | | | | IPv6 support was started a few years ago in the cifs client, but lacked a kernel helper function for parsing the ascii form of the ipv6 address. Now that that is added (and now IPv6 is the default that some OS use now) it was fairly easy to finish the cifs ipv6 support. This requires that CIFS_EXPERIMENTAL be enabled and (at least until the mount.cifs module is modified to use a new ipv6 friendly call instead of gethostbyname) and the ipv6 address be passed on the mount as "ip=" mount option. Thanks Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Switch cifsd to kthread_run from kernel_threadIgor Mammedov2007-04-031-16/+16
| | | | | | | | | cifsd was the only cifs thread that had not been switched to the newer kthread interface Signed-off-by: Igor Mammedov <niallain at gmail.com> Signed-off-by: Wilhelm Meier <wilhelm.meier@fh-kl.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] on reconnect to Samba - reset the unix capabilitiesSteve French2007-02-141-44/+86
| | | | | | | | | | After temporary server or network failure and reconneciton, we were not resending the unix capabilities via SetFSInfo - which confused Samba posix byte range locking code. Discovered by jra Signed-off-by: Steve French <sfrench@us.ibm.com>
* [PATCH] Add include/linux/freezer.h and move definitions from sched.hNigel Cunningham2006-12-071-0/+1
| | | | | | | | | | | | | Move process freezing functions from include/linux/sched.h to freezer.h, so that modifications to the freezer or the kernel configuration don't require recompiling just about everything. [akpm@osdl.org: fix ueagle driver] Signed-off-by: Nigel Cunningham <nigel@suspend2.net> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [CIFS] Allow null user connectionsSteve French2006-10-301-1/+6
| | | | | | | | Some servers are configured to only allow null user mounts for guest access. Allow nul user (anonymous) mounts e.g. mount -t cifs //server/share /mnt -o username= Signed-off-by: Steve French <sfrench@us.ibm.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds2006-10-131-13/+22
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: (27 commits) [CIFS] Missing flags2 for DFS [CIFS] Workaround incomplete byte length returned by some [CIFS] cifs Kconfig: don't select CONNECTOR [CIFS] Level 1 QPathInfo needed for proper OS2 support [CIFS] fix typo in previous patch [CIFS] Fix old DOS time conversion to handle timezone [CIFS] Do not need to adjust for Jan/Feb for leap day [CIFS] Fix leaps year calculation for years after 2100 [CIFS] readdir (ffirst) enablement of accurate timestamps from legacy servers [CIFS] Fix compiler warning with previous patch [CIFS] Fix typo [CIFS] Allow for 15 minute TZs (e.g. Nepal) and be more explicit about [CIFS] Fix readdir of large directories for backlevel servers [CIFS] Allow LANMAN21 support even in both POSIX non-POSIX path [CIFS] Make use of newer QFSInfo dependent on capability bit instead of [CIFS] Do not send newer QFSInfo to legacy servers which can not support it [CIFS] Fix typo in name of new cifs_show_stats [CIFS] Rename server time zone field [CIFS] Handle legacy servers which return undefined time zone [CIFS] CIFS support for /proc/<pid>/mountstats part 1 ... Manual conflict resolution in fs/cifs/connect.c
| * [CIFS] Missing flags2 for DFSSteve French2006-10-121-1/+3
| | | | | | | | | | | | Partly suggested by Igor Mammedov Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] Do not send newer QFSInfo to legacy servers which can not support itSteve French2006-09-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Fix dialect negotiation to save off when we have negotiated lanman. This allows us to avoid sending some somewhat newer requests that the server can not handle and go directly to the older version (infolevel) of the same call. Make sure we try to negotiate a level which allows us to get the server OS (which we check so we can detect Win9x vs. other legacy servers and eventually work around the Win9x DOS time bug (they reverse date/time fields). Signed-off-by: Steve French <sfrench@us.ibm.com>
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