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2010-06-22SUNRPC: Fix a re-entrancy bug in xs_tcp_read_calldir()Trond Myklebust
If the attempt to read the calldir fails, then instead of storing the read bytes, we currently discard them. This leads to a garbage final result when upon re-entry to the same routine, we read the remaining bytes. Fixes the regression in bugzilla number 16213. Please see https://bugzilla.kernel.org/show_bug.cgi?id=16213 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org
2010-05-26sunrpc: fix leak on error on socket xprt setupJ. Bruce Fields
Also collect exit code together while we're at it. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-25sunrpc: use formatting of module name in SUNRPCAlex Riesen
gcc-4.3.3 produces the warning: "format not a string literal and no format arguments" Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Chuck Lever <cel@citi.umich.edu> Cc: David S. Miller <davem@davemloft.net> Acked-by: Tom Talpey <tmtalpey@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-25kernel-wide: replace USHORT_MAX, SHORT_MAX and SHORT_MIN with USHRT_MAX, ↵Alexey Dobriyan
SHRT_MAX and SHRT_MIN - C99 knows about USHRT_MAX/SHRT_MAX/SHRT_MIN, not USHORT_MAX/SHORT_MAX/SHORT_MIN. - Make SHRT_MIN of type s16, not int, for consistency. [akpm@linux-foundation.org: fix drivers/dma/timb_dma.c] [akpm@linux-foundation.org: fix security/keys/keyring.c] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-24Merge branch 'bkl/ioctl' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing * 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing: uml: Pushdown the bkl from harddog_kern ioctl sunrpc: Pushdown the bkl from sunrpc cache ioctl sunrpc: Pushdown the bkl from ioctl autofs4: Pushdown the bkl from ioctl uml: Convert to unlocked_ioctls to remove implicit BKL ncpfs: BKL ioctl pushdown coda: Clean-up whitespace problems in pioctl.c coda: BKL ioctl pushdown drivers: Push down BKL into various drivers isdn: Push down BKL into ioctl functions scsi: Push down BKL into ioctl functions dvb: Push down BKL into ioctl functions smbfs: Push down BKL into ioctl function coda/psdev: Remove BKL from ioctl function um/mmapper: Remove BKL usage sn_hwperf: Kill BKL usage hfsplus: Push down BKL into ioctl function
2010-05-22sunrpc: Pushdown the bkl from sunrpc cache ioctlFrederic Weisbecker
Pushdown the bkl to cache_ioctl_pipefs. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: Nfs <linux-nfs@vger.kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: John Kacur <jkacur@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de>
2010-05-22sunrpc: Pushdown the bkl from ioctlFrederic Weisbecker
Pushdown the bkl to rpc_pipe_ioctl. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: Nfs <linux-nfs@vger.kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: John Kacur <jkacur@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de>
2010-05-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1674 commits) qlcnic: adding co maintainer ixgbe: add support for active DA cables ixgbe: dcb, do not tag tc_prio_control frames ixgbe: fix ixgbe_tx_is_paused logic ixgbe: always enable vlan strip/insert when DCB is enabled ixgbe: remove some redundant code in setting FCoE FIP filter ixgbe: fix wrong offset to fc_frame_header in ixgbe_fcoe_ddp ixgbe: fix header len when unsplit packet overflows to data buffer ipv6: Never schedule DAD timer on dead address ipv6: Use POSTDAD state ipv6: Use state_lock to protect ifa state ipv6: Replace inet6_ifaddr->dead with state cxgb4: notify upper drivers if the device is already up when they load cxgb4: keep interrupts available when the ports are brought down cxgb4: fix initial addition of MAC address cnic: Return SPQ credit to bnx2x after ring setup and shutdown. cnic: Convert cnic_local_flags to atomic ops. can: Fix SJA1000 command register writes on SMP systems bridge: fix build for CONFIG_SYSFS disabled ARCNET: Limit com20020 PCI ID matches for SOHARD cards ... Fix up various conflicts with pcmcia tree drivers/net/ {pcmcia/3c589_cs.c, wireless/orinoco/orinoco_cs.c and wireless/orinoco/spectrum_cs.c} and feature removal (Documentation/feature-removal-schedule.txt). Also fix a non-content conflict due to pm_qos_requirement getting renamed in the PM tree (now pm_qos_request) in net/mac80211/scan.c
2010-05-19Merge branch 'for-2.6.35' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
* 'for-2.6.35' of git://linux-nfs.org/~bfields/linux: (45 commits) Revert "nfsd4: distinguish expired from stale stateids" nfsd: safer initialization order in find_file() nfs4: minor callback code simplification, comment NFSD: don't report compiled-out versions as present nfsd4: implement reclaim_complete nfsd4: nfsd4_destroy_session must set callback client under the state lock nfsd4: keep a reference count on client while in use nfsd4: mark_client_expired nfsd4: introduce nfs4_client.cl_refcount nfsd4: refactor expire_client nfsd4: extend the client_lock to cover cl_lru nfsd4: use list_move in move_to_confirmed nfsd4: fold release_session into expire_client nfsd4: rename sessionid_lock to client_lock nfsd4: fix bare destroy_session null dereference nfsd4: use local variable in nfs4svc_encode_compoundres nfsd: further comment typos sunrpc: centralise most calls to svc_xprt_received nfsd4: fix unlikely race in session replay case nfsd4: fix filehandle comment ...
2010-05-19Merge branch 'nfs-for-2.6.35' of ↵Linus Torvalds
git://git.linux-nfs.org/projects/trondmy/nfs-2.6 * 'nfs-for-2.6.35' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (78 commits) SUNRPC: Don't spam gssd with upcall requests when the kerberos key expired SUNRPC: Reorder the struct rpc_task fields SUNRPC: Remove the 'tk_magic' debugging field SUNRPC: Move the task->tk_bytes_sent and tk_rtt to struct rpc_rqst NFS: Don't call iput() in nfs_access_cache_shrinker NFS: Clean up nfs_access_zap_cache() NFS: Don't run nfs_access_cache_shrinker() when the mask is GFP_NOFS SUNRPC: Ensure rpcauth_prune_expired() respects the nr_to_scan parameter SUNRPC: Ensure memory shrinker doesn't waste time in rpcauth_prune_expired() SUNRPC: Dont run rpcauth_cache_shrinker() when gfp_mask is GFP_NOFS NFS: Read requests can use GFP_KERNEL. NFS: Clean up nfs_create_request() NFS: Don't use GFP_KERNEL in rpcsec_gss downcalls NFSv4: Don't use GFP_KERNEL allocations in state recovery SUNRPC: Fix xs_setup_bc_tcp() SUNRPC: Replace jiffies-based metrics with ktime-based metrics ktime: introduce ktime_to_ms() SUNRPC: RPC metrics and RTT estimator should use same RTT value NFS: Calldata for nfs4_renew_done() NFS: Squelch compiler warning in nfs_add_server_stats() ...
2010-05-19Merge branch 'bkl/procfs' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing * 'bkl/procfs' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing: sunrpc: Include missing smp_lock.h procfs: Kill the bkl in ioctl procfs: Push down the bkl from ioctl procfs: Use generic_file_llseek in /proc/vmcore procfs: Use generic_file_llseek in /proc/kmsg procfs: Use generic_file_llseek in /proc/kcore procfs: Kill BKL in llseek on proc base
2010-05-17net: Remove unnecessary returns from void function()sJoe Perches
This patch removes from net/ (but not any netfilter files) all the unnecessary return; statements that precede the last closing brace of void functions. It does not remove the returns that are immediately preceded by a label as gcc doesn't like that. Done via: $ grep -rP --include=*.[ch] -l "return;\n}" net/ | \ xargs perl -i -e 'local $/ ; while (<>) { s/\n[ \t\n]+return;\n}/\n}/g; print; }' Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-17sunrpc: Include missing smp_lock.hFrederic Weisbecker
Now that cache_ioctl_procfs() calls the bkl explicitly, we need to include the relevant header as well. This fixes the following build error: net/sunrpc/cache.c: In function 'cache_ioctl_procfs': net/sunrpc/cache.c:1355: error: implicit declaration of function 'lock_kernel' net/sunrpc/cache.c:1359: error: implicit declaration of function 'unlock_kernel' Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-05-17procfs: Push down the bkl from ioctlFrederic Weisbecker
Push down the bkl from procfs's ioctl main handler to its users. Only three procfs users implement an ioctl (non unlocked) handler. Turn them into unlocked_ioctl and push down the Devil inside. v2: PDE(inode)->data doesn't need to be under bkl v3: And don't forget to git-add the result v4: Use wrappers to pushdown instead of an invasive and error prone handlers surgery. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: John Kacur <jkacur@redhat.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Alexey Dobriyan <adobriyan@gmail.com>
2010-05-14SUNRPC: Don't spam gssd with upcall requests when the kerberos key expiredTrond Myklebust
Now that the rpc.gssd daemon can explicitly tell us that the key expired, we should cache that information to avoid spamming gssd. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Remove the 'tk_magic' debugging fieldTrond Myklebust
It has not triggered in almost a decade. Time to get rid of it... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Move the task->tk_bytes_sent and tk_rtt to struct rpc_rqstTrond Myklebust
It seems strange to maintain stats for bytes_sent in one structure, and bytes received in another. Try to assemble all the RPC request-related stats in struct rpc_rqst Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Ensure rpcauth_prune_expired() respects the nr_to_scan parameterTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Ensure memory shrinker doesn't waste time in rpcauth_prune_expired()Trond Myklebust
The 'cred_unused' list, that is traversed by rpcauth_cache_shrinker is ordered by time. If we hit a credential that is under the 60 second garbage collection moratorium, we should exit because we know at that point that all successive credentials are subject to the same moratorium... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Dont run rpcauth_cache_shrinker() when gfp_mask is GFP_NOFSTrond Myklebust
Under some circumstances, put_rpccred() can end up allocating memory, so check the gfp_mask to prevent deadlocks. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14NFS: Don't use GFP_KERNEL in rpcsec_gss downcallsTrond Myklebust
Again, we can deadlock if the memory reclaim triggers a writeback that requires a rpcsec_gss credential lookup. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Fix xs_setup_bc_tcp()Trond Myklebust
It is a BUG for anybody to call this function without setting args->bc_xprt. Trying to return an error value is just wrong, since the user cannot fix this: it is a programming error, not a user error. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Replace jiffies-based metrics with ktime-based metricsChuck Lever
Currently RPC performance metrics that tabulate elapsed time use jiffies time values. This is problematic on systems that use slow jiffies (for instance 100HZ systems built for paravirtualized environments). It is also a problem for computing precise latency statistics for advanced network transports, such as InfiniBand, that can have round-trip latencies significanly faster than a single clock tick. For the RPC client, adopt the high resolution time stamp mechanism already used by the network layer and blktrace: ktime. We use ktime format time stamps for all internal computations, and convert to milliseconds for presentation. As a result, we need only addition operations in the performance critical paths; multiply/divide is required only for presentation. We could report RTT metrics in microseconds. In fact the mountstats format is versioned to accomodate exactly this kind of interface improvement. For now, however, we'll stay with millisecond precision for presentation to maintain backwards compatibility with the handful of currently deployed user space tools. At a later point, we'll move to an API such as BDI_STATS where a finer timestamp precision can be reported. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: RPC metrics and RTT estimator should use same RTT valueChuck Lever
Compute an RPC request's RTT once, and use that value both for reporting RPC metrics, and for adjusting the RTT context used by the RPC client's RTT estimator algorithm. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Fail over more quickly on connect errorsTrond Myklebust
We should not allow soft tasks to wait for longer than the major timeout period when waiting for a reconnect to occur. Remove the field xprt->connect_timeout since it has been obsoleted by xprt->reestablish_timeout. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Move the test for XPRT_CONNECTING into xprt_connect()Trond Myklebust
This fixes a bug with setting xprt->stat.connect_start. Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Cleanup - make rpc_new_task() call rpc_release_calldata on failureTrond Myklebust
Also have it return an ERR_PTR(-ENOMEM) instead of a null pointer. Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Clean up xprt_release()Trond Myklebust
Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Advertise rc4-hmac enctype support in the rpcsec_gss/krb5 upcallTrond Myklebust
Update the upcall info indicating which Kerberos enctypes the kernel supports Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Add support for rc4-hmac encryptionKevin Coffman
Add necessary changes to add kernel support for the rc4-hmac Kerberos encryption type used by Microsoft and described in rfc4757. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Use confounder length in wrap codeKevin Coffman
All encryption types use a confounder at the beginning of the wrap token. In all encryption types except arcfour-hmac, the confounder is the same as the blocksize. arcfour-hmac has a blocksize of one, but uses an eight byte confounder. Add an entry to the crypto framework definitions for the confounder length and change the wrap/unwrap code to use the confounder length rather than assuming it is always the blocksize. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gssd_krb5: More arcfour-hmac supportKevin Coffman
For the arcfour-hmac support, the make_seq_num and get_seq_num functions need access to the kerberos context structure. This will be used in a later patch. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Save the raw session key in the contextKevin Coffman
This is needed for deriving arcfour-hmac keys "on the fly" using the sequence number or checksu Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gssd_krb5: arcfour-hmac supportKevin Coffman
For arcfour-hmac support, the make_checksum function needs a usage field to correctly calculate the checksum differently for MIC and WRAP tokens. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Advertise AES enctype support in the rpcsec_gss/krb5 upcallTrond Myklebust
Update upcall info indicating which Kerberos enctypes the kernel supports Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: add remaining pieces to enable AES encryption supportKevin Coffman
Add the remaining pieces to enable support for Kerberos AES encryption types. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: add support for new token formats in rfc4121Kevin Coffman
This is a step toward support for AES encryption types which are required to use the new token formats defined in rfc4121. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> [SteveD: Fixed a typo in gss_verify_mic_v2()] Signed-off-by: Steve Dickson <steved@redhat.com> [Trond: Got rid of the TEST_ROTATE/TEST_EXTRA_COUNT crap] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14xdr: Add an export for the helper function write_bytes_to_xdr_buf()Kevin Coffman
Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Advertise triple-des enctype support in the rpcsec_gss/krb5 upcallTrond Myklebust
Update the upcall info indicating which Kerberos enctypes the kernel supports. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: add support for triple-des encryptionKevin Coffman
Add the final pieces to support the triple-des encryption type. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Add upcall info indicating supported kerberos enctypesTrond Myklebust
The text based upcall now indicates which Kerberos encryption types are supported by the kernel rpcsecgss code. This is used by gssd to determine which encryption types it should attempt to negotiate when creating a context with a server. The server principal's database and keytab encryption types are what limits what it should negotiate. Therefore, its keytab should be created with only the enctypes listed by this file. Currently we support des-cbc-crc, des-cbc-md4 and des-cbc-md5 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: handle new context format from gssdKevin Coffman
For encryption types other than DES, gssd sends down context information in a new format. This new format includes the information needed to support the new Kerberos GSS-API tokens defined in rfc4121. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: import functionality to derive keys into the kernelKevin Coffman
Import the code to derive Kerberos keys from a base key into the kernel. This will allow us to change the format of the context information sent down from gssd to include only a single key. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: add ability to have a keyed checksum (hmac)Kevin Coffman
Encryption types besides DES may use a keyed checksum (hmac). Modify the make_checksum() function to allow for a key and take care of enctype-specific processing such as truncating the resulting hash. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: introduce encryption type frameworkKevin Coffman
Add enctype framework and change functions to use the generic values from it rather than the values hard-coded for des. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: prepare for new context formatKevin Coffman
Prepare for new context format by splitting out the old "v1" context processing function Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: split up functions in preparation of adding new enctypesKevin Coffman
Add encryption type to the krb5 context structure and use it to switch to the correct functions depending on the encryption type. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Don't expect blocksize to always be 8 when calculating paddingJ. Bruce Fields
Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Added and improved code commentsKevin Coffman
Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Introduce encryption type frameworkKevin Coffman
Make the client and server code consistent regarding the extra buffer space made available for the auth code when wrapping data. Add some comments/documentation about the available buffer space in the xdr_buf head and tail when gss_wrap is called. Add a compile-time check to make sure we are not exceeding the available buffer space. Add a central function to shift head data. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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