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path: root/fs/nfs/callback_xdr.c
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2012-01-12nfs: check for integer overflow in decode_devicenotify_args()Dan Carpenter1-0/+4
On 32 bit, if n is too large then "n * sizeof(*args->devs)" could overflow and args->devs would be smaller than expected. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-11-04nfs: set vs_hidden on nfs4_callback_version4 (try #2)Jeff Layton1-0/+1
This service should not be registered with or unregistered from rpcbind. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-10-31NFS4: fix cb_recallany decode errorPeng Tao1-5/+6
craa_type_mask is bitmap4 per RFC5661. We need to expect a length before extracting bitmap value. Cc: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-08-04NFSv4.1: Fix the callback 'highest_used_slotid' behaviourTrond Myklebust1-17/+7
Currently, there is no guarantee that we will call nfs4_cb_take_slot() even though nfs4_callback_compound() will consistently call nfs4_cb_free_slot() provided the cb_process_state has set the 'clp' field. The result is that we can trigger the BUG_ON() upon the next call to nfs4_cb_take_slot(). This patch fixes the above problem by using the slot id that was taken in the CB_SEQUENCE operation as a flag for whether or not we need to call nfs4_cb_free_slot(). It also fixes an atomicity problem: we need to set tbl->highest_used_slotid atomically with the check for NFS4_SESSION_DRAINING, otherwise we end up racing with the various tests in nfs4_begin_drain_session(). Cc: stable@kernel.org [2.6.38+] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-05-29pnfs: CB_NOTIFY_DEVICEIDMarc Eshel1-1/+95
Note: This functionlaity is incomplete as all layout segments referring to the 'to be removed device id' need to be reaped, and all in flight I/O drained. [use be32 res in nfs4_callback_devicenotify] [use nfs_client to qualify deviceid for cb_notify_deviceid] [use global deviceid cache for CB_NOTIFY_DEVICEID] [refactor device cache _lookup_deviceid] [refactor device cache _find_get_deviceid] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Bug in new global-device-cache code] [layout_driver MUST set free_deviceid_node if using dev-cache] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-03-31Fix common misspellingsLucas De Marchi1-1/+1
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-01-25NFS do not find client in NFSv4 pg_authenticateAndy Adamson1-3/+2
The information required to find the nfs_client cooresponding to the incoming back channel request is contained in the NFS layer. Perform minimal checking in the RPC layer pg_authenticate method, and push more detailed checking into the NFS layer where the nfs_client can be found. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: CB_LAYOUTRECALL xdr codeFred Isaman1-1/+68
This is the xdr decoding for CB_LAYOUTRECALL. Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com> Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06NFS add session back channel drainingAndy Adamson1-0/+35
Currently session draining only drains the fore channel. The back channel processing must also be drained. Use the back channel highest_slot_used to indicate that a callback is being processed by the callback thread. Move the session complete to be per channel. When the session is draininig, wait for any current back channel processing to complete and stop all new back channel processing by returning NFS4ERR_DELAY to the back channel client. Drain the back channel, then the fore channel. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06NFS refactor nfs_find_client and reference client across callback processingAndy Adamson1-15/+24
Fixes a bug where the nfs_client could be freed during callback processing. Refactor nfs_find_client to use minorversion specific means to locate the correct nfs_client structure. In the NFS layer, V4.0 clients are found using the callback_ident field in the CB_COMPOUND header. V4.1 clients are found using the sessionID in the CB_SEQUENCE operation which is also compared against the sessionID associated with the back channel thread after a successful CREATE_SESSION. Each of these methods finds the one an only nfs_client associated with the incoming callback request - so nfs_find_client_next is not needed. In the RPC layer, the pg_authenticate call needs to find the nfs_client. For the v4.0 callback service, the callback identifier has not been decoded so a search by address, version, and minorversion is used. The sessionid for the sessions based callback service has (usually) not been set for the pg_authenticate on a CB_NULL call which can be sent prior to the return of a CREATE_SESSION call, so the sessionid associated with the back channel thread is not used to find the client in pg_authenticate for CB_NULL calls. Pass the referenced nfs_client to each CB_COMPOUND operation being proceesed via the new cb_process_state structure. The reference is held across cb_compound processing. Use the new cb_process_state struct to move the NFS4ERR_RETRY_UNCACHED_REP processing from process_op into nfs4_callback_sequence where it belongs. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo1-0/+1
implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-08nfs4: Make the v4 callback service hiddenSteve Dickson1-0/+1
To avoid hangs in the svc_unregister(), on version 4 mounts (and unmounts), when rpcbind is not running, make the nfs4 callback program an 'hidden' service by setting the 'vs_hidden' flag in the nfs4_callback_version structure. Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-02-10nfs41: cleanup callback code to use __be32 typeAndy Adamson1-15/+15
Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-02-10nfs41: implement cb_recall_slotAndy Adamson1-1/+21
Drain the fore channel and reset the max_slots to the new value. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-02-10nfs41: back channel drc minimal implementationAndy Adamson1-4/+15
For now the back channel ca_maxresponsesize_cached is 0 and there is no backchannel DRC. Return NFS4ERR_REP_TOO_BIG_TO_CACHE when a cb_sequence cachethis is true. When it is false, return NFS4ERR_RETRY_UNCACHED_REP as the next operation error. Remember the replay error accross compound operation processing. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-02-10nfs41: remove uneeded checks in callback processingAndy Adamson1-3/+2
All callback operations have arguments to decode and require processing. The preprocess_nfs4X_op functions catch unsupported or illegal ops so decode_args and process_op pointers are always non NULL. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-02-10nfs41: directly encode back channel errorAndy Adamson1-1/+4
Skip all other processing when error is encountered. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-02-10nfs41: fix wrong error on callback header xdr overflowAndy Adamson1-10/+18
Set NFS4ERR_RESOURCE as CB_COMPOUND status and do not return an op on decode_op_hdr or encode_op_hdr buffer overflow. NFS4ERR_RESOURCE is correct for v4.0. Will fix the return for v4.1 along with all the other NFS4ERR_RESOURCE errors in a later patch. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-12-05nfs41: V2 initial support for CB_RECALL_ANYAlexandros Batsakis1-1/+26
For now the clients returns _all_ the delegations of the specificed type it holds Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-12-05nfs41: add support for callback with RPC version number 4Alexandros Batsakis1-0/+7
The NFSv4.1 spec-29 (18.36.3) says that the server MUST use an ONC RPC (program) version number equal to 4 in callbacks sent to the client. For now we allow both versions 1 and 4. Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-09-21trivial: remove unnecessary semicolonsJoe Perches1-1/+1
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-06-17nfs41: Backchannel: update cb_sequence args and resultsRicardo Labiaga1-1/+1
Change the type of cs_addr and csr_status to 'struct sockaddr' and '__be32' since the cb_sequence processing function will use existing functionality that expects these types. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: verify CB_SEQUENCE position in callback compoundBenny Halevy1-0/+8
CB_SEQUENCE must appear first in the callback compound RPC. If it is not the first operation NFS4ERR_SEQUENCE_POS must be returned. If the first operation ni the CB_COMPOUND is not CB_SEQUENCE then NFS4ERR_OP_NOT_IN_SESSION must be returned. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: refactor op preprocessing out of process_op] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: cb_sequence xdr implementationBenny Halevy1-2/+170
[nfs41: get rid of READMEM and COPYMEM for callback_xdr.c] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: get rid of READ64 in callback_xdr.c] See http://linux-nfs.org/pipermail/pnfs/2009-June/007846.html Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: consider minorversion in callback_xdr:process_opBenny Halevy1-14/+71
Note that this patch changes the nfsv4.0 behavior also when CONFIG_NFS_V4_1 is not defined where NFS4ERR_MINOR_VERS_MISMATCH will be returned if the client received a CB_COMPOUND with minorversion != 0. Previously, it would have returned NFS4ERR_OP_ILLEGAL for CB_SEQUENCE. (or if the server is broken and sent OP_CB_GETATTR or OP_CB_RECALL with minorversion!=0, they would have been processed normally. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: refactor op preprocessing out of process_op] See http://linux-nfs.org/pipermail/pnfs/2009-June/007845.html [nfs41: define CB_NOTIFY_DEVICEID as not supported] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: decode minorversion 1 cb_compound headerBenny Halevy1-3/+4
decode cb_compound header conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Get rid of cb_compound_hdr_arg.callback_ident callback_ident is not used anywhere so we shouldn't waste any memory to store it. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: no need to break read_buf in decode_compound_hdr_arg] See http://linux-nfs.org/pipermail/pnfs/2009-June/007844.html Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: store minorversion in cb_compound_hdr_argBenny Halevy1-5/+7
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2008-05-16nfs: replace remaining __FUNCTION__ occurrencesHarvey Harrison1-9/+9
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-05-16NFSv4: Check the return value of decode_compound_hdr_arg()Trond Myklebust1-11/+11
If decode_compound_hdr_arg() returns a resource error, then we cannot proceed to process the callback. Return a 'GARBAGE_ARGS' rpc-level error to the caller instead. If, however, the minor version field is incorrect, then we need to propagate the resulting NFS4ERR_MINOR_VERS_MISMATCH error back as the compound status field (setting the nops field to 0). Finally, if encode_compound_hdr_res() returns an error, we need to return an RPC_SYSTEM_ERR to the caller. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-02-20nfs: fix sparse warningsHarvey Harrison1-3/+3
fs/nfs/nfs4state.c:788:34: warning: Using plain integer as NULL pointer fs/nfs/delegation.c:52:34: warning: Using plain integer as NULL pointer fs/nfs/idmap.c:312:12: warning: Using plain integer as NULL pointer fs/nfs/callback_xdr.c:257:6: warning: Using plain integer as NULL pointer fs/nfs/callback_xdr.c:270:6: warning: Using plain integer as NULL pointer fs/nfs/callback_xdr.c:281:6: warning: Using plain integer as NULL pointer Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Change cb_recallargs to pass "struct sockaddr *" instead of sockaddr_inChuck Lever1-1/+1
Change the addr field in the cb_recallargs struct to a "struct sockaddr *" to support non-IPv4 addresses. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Change cb_getattrargs to pass "struct sockaddr *" instead of sockaddr_inChuck Lever1-1/+1
Change the addr field in the cb_getattrargs struct to a "struct sockaddr *" to support non-IPv4 addresses. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Remove an unneeded check in decode_compound_header_arg()Chuck Lever1-1/+1
Clean up: The header tag length is unsigned, so checking that it is less than zero is unnecessary. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-07-19NFSv4: debug print ntohl(status) in nfs client callback xdr codeBenny Halevy1-5/+5
status in nfs client callback xdr code is passed in network order. print it in host order for better readability. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-02-12[PATCH] knfsd: SUNRPC: Provide room in svc_rqst for larger addressesChuck Lever1-2/+2
Expand the rq_addr field to allow it to contain larger addresses. Specifically, we replace a 'sockaddr_in' with a 'sockaddr_storage', then everywhere the 'sockaddr_in' was referenced, we use instead an accessor function (svc_addr_in) which safely casts the _storage to _in. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-10-20[PATCH] xdr annotations: fs/nfs/callback*Al Viro1-22/+22
on-the-wire data is big-endian [mostly pulled from Alexey's patch] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-20[PATCH] fs/nfs/callback* passes error values big-endianAl Viro1-30/+30
[pulled from Alexey's patch] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-20[PATCH] fix svc_procfunc declarationAl Viro1-2/+2
svc_procfunc instances return __be32, not int Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel1-1/+0
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-09NFSv4: really return status from decode_recall_args()Alexey Dobriyan1-1/+1
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-03-20NFSv4: Kill braindead gcc warningsTrond Myklebust1-12/+16
nfs4_open_revalidate: 'res' may be used uninitialized nfs4_callback_compound: ‘hdr_res.nops’ may be used uninitialized 'op_nr’ may be used uninitialized encode_getattr_res: ‘savep’ may be used uninitialized Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-06-22[PATCH] NFSv4: Fix an Oops in the callback code.Trond Myklebust1-1/+0
The changeset "trond.myklebust@fys.uio.no|ChangeSet|20050322152404|16979" (RPC: Ensure XDR iovec length is initialized correctly in call_header) causes the NFSv4 callback code to BUG() due to an incorrectly initialized scratch buffer. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-06-22[PATCH] NFS: Header file cleanup...Trond Myklebust1-0/+1
- Move NFSv4 state definitions into a private header file. - Clean up gunk in nfs_fs.h Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-04-16Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds1-0/+481
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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