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* NFS: remove needless check in nfs_opendir()Carsten Otte2006-04-19
| | | | | | | | | Local variable res was initialized to 0 - no check needed here. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: nfs_show_stats; for_each_possible_cpu(), not NR_CPUSJohn Hawkes2006-04-19
| | | | | | | | | Convert a for-loop that explicitly references "NR_CPUS" into the potentially more efficient for_each_possible_cpu() construct. Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS,SUNRPC: Fix compiler warnings if CONFIG_PROC_FS & CONFIG_SYSCTL are unsetTrond Myklebust2006-04-19
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* VFS: Fix another open intent OopsTrond Myklebust2006-04-19
| | | | | | | If the call to nfs_intent_set_file() fails to open a file in nfs4_proc_create(), we should return an error. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* [PATCH] Make most file operations structs in fs/ constArjan van de Ven2006-03-28
| | | | | | | | | | | | | | This is a conversion to make the various file_operations structs in fs/ const. Basically a regexp job, with a few manual fixups The goal is both to increase correctness (harder to accidentally write to shared datastructures) and reducing the false sharing of cachelines with things that get dirty in .data (while .rodata is nicely read only and thus cache clean) Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mempool: use mempool_create_slab_pool()Matthew Dobson2006-03-26
| | | | | | | | | | Modify well over a dozen mempool users to call mempool_create_slab_pool() rather than calling mempool_create() with extra arguments, saving about 30 lines of code and increasing readability. Signed-off-by: Matthew Dobson <colpatch@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Make address_space_operations->invalidatepage return voidNeilBrown2006-03-26
| | | | | | | | | | | | | | | | The return value of this function is never used, so let's be honest and declare it as void. Some places where invalidatepage returned 0, I have inserted comments suggesting a BUG_ON. [akpm@osdl.org: JBD BUG fix] [akpm@osdl.org: rework for git-nfs] [akpm@osdl.org: don't go BUG in block_invalidate_page()] Signed-off-by: Neil Brown <neilb@suse.de> Acked-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sem2mutex: fs/Ingo Molnar2006-03-26
| | | | | | | | | | | | | | | | | | Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org> Cc: Robert Love <rml@tech9.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Neil Brown <neilb@cse.unsw.edu.au> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge git://git.linux-nfs.org/pub/linux/nfs-2.6Linus Torvalds2006-03-25
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.linux-nfs.org/pub/linux/nfs-2.6: (103 commits) SUNRPC,RPCSEC_GSS: spkm3--fix config dependencies SUNRPC,RPCSEC_GSS: spkm3: import contexts using NID_cast5_cbc LOCKD: Make nlmsvc_traverse_shares return void LOCKD: nlmsvc_traverse_blocks return is unused SUNRPC,RPCSEC_GSS: fix krb5 sequence numbers. NFSv4: Dont list system.nfs4_acl for filesystems that don't support it. SUNRPC,RPCSEC_GSS: remove unnecessary kmalloc of a checksum SUNRPC: Ensure rpc_call_async() always calls tk_ops->rpc_release() SUNRPC: Fix memory barriers for req->rq_received NFS: Fix a race in nfs_sync_inode() NFS: Clean up nfs_flush_list() NFS: Fix a race with PG_private and nfs_release_page() NFSv4: Ensure the callback daemon flushes signals SUNRPC: Fix a 'Busy inodes' error in rpc_pipefs NFS, NLM: Allow blocking locks to respect signals NFS: Make nfs_fhget() return appropriate error values NFSv4: Fix an oops in nfs4_fill_super lockd: blocks should hold a reference to the nlm_file NFSv4: SETCLIENTID_CONFIRM should handle NFS4ERR_DELAY/NFS4ERR_RESOURCE NFSv4: Send the delegation stateid for SETATTR calls ...
| * NFSv4: Dont list system.nfs4_acl for filesystems that don't support it.J. Bruce Fields2006-03-20
| | | | | | | | | | | | | | | | | | | | Thanks to Frank Filz for pointing out that we list system.nfs4_acl extended attribute even on filesystems where we don't actually support nfs4_acl. This is inconsistent with the e.g. ext3 POSIX ACL behaviour, and seems to annoy cp. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * SUNRPC: Ensure rpc_call_async() always calls tk_ops->rpc_release()Trond Myklebust2006-03-20
| | | | | | | | | | | | | | Currently this will not happen if we exit before rpc_new_task() was called. Also fix up rpc_run_task() to do the same (for consistency). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Fix a race in nfs_sync_inode()Trond Myklebust2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Kudos to Neil Brown for spotting the problem: "in nfs_sync_inode, there is effectively the sequence: nfs_wait_on_requests nfs_flush_inode nfs_commit_inode This seems a bit racy to me as if the only requests are on the ->commit list, and nfs_commit_inode is called separately after nfs_wait_on_requests completes, and before nfs_commit_inode start (say: by nfs_write_inode) then none of these function will return >0, yet there will be some pending request that aren't waited for." The solution is to search for requests to wait upon, search for dirty requests, and search for uncommitted requests while holding the nfsi->req_lock The patch also cleans up nfs_sync_inode(), getting rid of the redundant FLUSH_WAIT flag. It turns out that we were always setting it. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Clean up nfs_flush_list()Trond Myklebust2006-03-20
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Fix a race with PG_private and nfs_release_page()Trond Myklebust2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We don't need to set PG_private for readahead pages, since they never get unlocked while I/O is in progress. However there is a small race in nfs_readpage_release() whereby the page may be unlocked, and have PG_private set. Fix is to have PG_private set only for the case of writes... Also fix a bug in nfs_clear_page_writeback(): Don't attempt to clear the radix_tree tag if we've already deleted the radix tree entry. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Ensure the callback daemon flushes signalsTrond Myklebust2006-03-20
| | | | | | | | | | | | | | | | | | | | If the callback daemon is signalled, but is unable to exit because it still has users, then we need to flush signals. If not, then svc_recv() can never sleep, and so we hang. If we flush signals, then we also have to be prepared to resend them when we want the thread to exit. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS, NLM: Allow blocking locks to respect signalsTrond Myklebust2006-03-20
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Make nfs_fhget() return appropriate error valuesTrond Myklebust2006-03-20
| | | | | | | | | | | | | | Currently it returns NULL, which usually gets interpreted as ENOMEM. In fact it can mean a host of issues. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Fix an oops in nfs4_fill_superTrond Myklebust2006-03-20
| | | | | | | | | | | | | | | | | | | | The mount statistics patches introduced a call to nfs_free_iostats that is not only redundant, but actually causes an oops. Also fix a memory leak due to the lack of a call to nfs_free_iostats on unmount. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: SETCLIENTID_CONFIRM should handle NFS4ERR_DELAY/NFS4ERR_RESOURCETrond Myklebust2006-03-20
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Send the delegation stateid for SETATTR callsTrond Myklebust2006-03-20
| | | | | | | | | | | | | | In the case where we hold a delegation stateid, use that in for inside SETATTR calls. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Ensure nfs_callback_down() calls svc_destroy()Trond Myklebust2006-03-20
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NLM: Fix nlmclnt_test to not copy private part of locksTrond Myklebust2006-03-20
| | | | | | | | | | | | | | The struct file_lock does not carry a properly initialised lock, so don't copy it as if it were. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: O_DIRECT needs to use a completionTrond Myklebust2006-03-20
| | | | | | | | | | | | | | | | Now that we have aio writes, it is possible for dreq->outstanding to be zero, but for the I/O not to have completed. Convert struct nfs_direct_req to use a completion to signal when the I/O is done. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Clean up nfs_get_user_pagesTrond Myklebust2006-03-20
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: fix compiler warnings on 64-bit platformsChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | Introduced by NFS aio+dio patches. Test plan: Compile kernel with CONFIG_NFS enabled on 64-bit hardware. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Uninline nfs_writedata_(alloc|free) and nfs_readdata_(alloc|free)Trond Myklebust2006-03-20
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Debugging code for nfs_direct_(read|write)_schedule()Trond Myklebust2006-03-20
| | | | | | | | | | | | Make sure that we're doing our list accounting correctly. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: O_DIRECT async IO may lose contextTrond Myklebust2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | The struct nfs_direct_req currently keeps a pointer to the file descriptor without referencing it. This may cause problems if the parent process is killed. The nfs_open_context should normally have all the information that we're currently using the filp for, and unlike fput(), is safe to release from an rpciod process context. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * nfs: Use UNSTABLE + COMMIT for NFS O_DIRECT writesTrond Myklebust2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently NFS O_DIRECT writes use FILE_SYNC so that a COMMIT is not necessary. This simplifies the internal logic, but this could be a difficult workload for some servers. Instead, let's send UNSTABLE writes, and after they all complete, send a COMMIT for the dirty range. After the COMMIT returns successfully, then do the wake_up or fire off aio_complete(). Test plan: Async direct I/O tests against Solaris (or any server that requires committed unstable writes). Reboot server during test. Based on an earlier patch by Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Make nfs_commit_alloc() externTrond Myklebust2006-03-20
| | | | | | | | | | | | We need to use nfs_commit_alloc() in fs/nfs/direct.c. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: fix data_update accounting in NFS direct I/O pathChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | ^C against "iozone -I" is hitting the assertion in nfs_clear_inode(). Test plan: "iozone -i0 -I -a -c" against a slow server, then control C. This should not cause an oops. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Replace atomic_t variables in nfs_direct_req with a single spin lockChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three atomic_t variables cause a lot of bus locking. Because they are all used in the same places in the code, just use a single spin lock. Now that the atomic_t variables are gone, we can remove the request size limitation since the code no longer depends on the limited width of atomic_t on some platforms. Test plan: Compile with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled. Millions of fsx operations, iozone, OraSim. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: clean up comments and tab damage in direct.cChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | Clean up tab damage and comments. Replace "file_offset" with more commonly used "pos". Test plan: Compile with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: support EIOCBQUEUED return in direct write pathChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For async iocb's, the NFS direct write path now returns EIOCBQUEUED, and calls aio_complete when all the requested writes are finished. The synchronous part of the NFS direct write path behaves exactly as it was before. Shared mapped NFS files will have some coherency difficulties when accessed concurrently with aio+dio. Will need to explore how this is handled in the local file system case. Test plan: aio-stress with "-O". OraSim. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: make iocb available everywhere in direct write pathChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | Pass the iocb argument all the way down to the direct write request scheduler, and make it available in nfs_direct_write_result. Test plan: Compile the kernel with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled. Millions of fsx-odirect ops. OraSim. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: remove support for multi-segment iovs in the direct write pathChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | Eliminate the persistent use of automatic storage in all parts of the NFS client's direct write path to pave the way for introducing support for aio against files opened with the O_DIRECT flag. Test plan: Compile the kernel with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled. Millions of fsx-odirect ops. OraSim. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: make direct write path generate write requests concurrentlyChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Duplicate infrastructure from direct read path that will allow write path to generate multiple write requests concurrently. This will enable us to add support for aio in this path. Temporarily we will lose the ability to do UNSTABLE writes followed by a COMMIT in the direct write path. However, all applications I am aware of that use NFS O_DIRECT currently write in relatively small chunks, so this should not be inconvenient in any way. Test plan: Millions of fsx-odirect ops. OraSim. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: create common routine for handling direct I/O completionChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | Factor out the common piece of completing an NFS direct I/O request. Test plan: Compile kernel with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: create common routine for allocating nfs_direct_reqChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | Factor out a small common piece of the path that allocate nfs_direct_req structures. Test plan: Compile kernel with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: create common routine for waiting for direct I/O to completeChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We're about to add asynchrony to the NFS direct write path. Begin by abstracting out the common pieces in the read path. The first piece is nfs_direct_read_wait, which works the same whether the process is waiting for a read or a write. Test plan: Compile kernel with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: support EIOCBQUEUED return in direct read pathChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | For async iocb's, the NFS direct read path should return EIOCBQUEUED and call aio_complete when all the requested reads are finished. The synchronous part of the NFS direct read path behaves exactly as it was before. Test plan: aio-stress with "-O". OraSim. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: make iocb available everywhere in direct read pathChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | Pass the iocb argument all the way down to the direct read request scheduler, and make it available in nfs_direct_read_result. Test plan: Compile the kernel with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled. Millions of fsx-odirect ops. OraSim. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: remove support for multi-segment iovs in the direct read pathChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | Eliminate the persistent use of automatic storage in all parts of the NFS client's direct read path to pave the way for introducing support for aio against files opened with the O_DIRECT flag. Test plan: Compile the kernel with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled. Millions of fsx-odirect ops. OraSim. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: use size_t type for holding rsize bytes in NFS O_DIRECT read pathChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | size_t is used for holding byte counts, so use it for variables storing rsize. Note that the write path will be updated as we add support for async O_DIRECT writes. Test plan: Need to verify that existing comparisons against new size_t variables behave correctly. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: update comments and function definitions in fs/nfs/direct.cChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | Update to latest coding style standards. Remove block comments on statically defined functions, and place function definitions all on one line. Test plan: Compile kernel with CONFIG_NFS and CONFIG_NFS_DIRECTIO. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: clean up NFS client's a_ops->direct_IO methodChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The NFS client's a_ops->direct_IO method, nfs_direct_IO, is required to be present to allow NFS files to be opened with O_DIRECT, but is never called because the NFS client shunts reads and writes to files opened with O_DIRECT directly to its own routines. Gut the nfs_direct_IO function. This eliminates the only part of the NFS client's direct I/O path that requires support for multi-segment iovs, allowing further simplification in subsequent patches. Test plan: Compile the kernel with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled. Millions of fsx-odirect ops. OraSim. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Cleanup of NFS read codeTrond Myklebust2006-03-20
| | | | | | | | | | | | | | | | Same callback hierarchy inversion as for the NFS write calls. This patch is not strictly speaking needed by the O_DIRECT code, but avoids confusing differences between the asynchronous read and write code. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Cleanup of NFS write code in preparation for asynchronous o_directTrond Myklebust2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch inverts the callback hierarchy for NFS write calls. Instead of having the NFSv2/v3/v4-specific code set up the RPC callback ops, we allow the original caller to do so. This allows for more flexibility w.r.t. how to set up and tear down the nfs_write_data structure while still allowing the NFSv3/v4 code to perform error handling. The greater flexibility is needed by the asynchronous O_DIRECT code, which wants to be able to hold on to the original nfs_write_data structures after the WRITE RPC call has completed in order to be able to replay them if the COMMIT call determines that the server has rebooted. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * locks,lockd: fix race in nlmsvc_testlockAndy Adamson2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | posix_test_lock() returns a pointer to a struct file_lock which is unprotected and can be removed while in use by the caller. Move the conflicting lock from the return to a parameter, and copy the conflicting lock. In most cases the caller ends up putting the copy of the conflicting lock on the stack. On i386, sizeof(struct file_lock) appears to be about 100 bytes. We're assuming that's reasonable. Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: directory trace messagesChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reuse NFSDBG_DIRCACHE and NFSDBG_LOOKUPCACHE to provide additional diagnostic messages that trace the operation of the NFS client's directory behavior. A few new messages are now generated when NFSDBG_VFS is active, as well, to trace normal VFS activity. This compromise provides better trace debugging for those who use pre-built kernels, without adding a lot of extra noise to the standard debug settings. Test-plan: Enable NFS trace debugging with flags 1, 2, or 4. You should be able to see different types of trace messages with each flag setting. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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