Commit Graph

119 Commits

Author SHA1 Message Date
Andy Adamson 869a9d375d NFSv4.1 Fail data server I/O if stateid represents a lost lock
Signed-off-by: Andy Adamson <andros@netapp.com>
Link: http://lkml.kernel.org/r/1393954269-3974-1-git-send-email-andros@netapp.com
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-03-05 11:55:24 -05:00
Trond Myklebust 905e7dafbe NFSv4.1: Cleanup
It is now completely safe to call nfs41_sequence_free_slot with a NULL
slot.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-01-29 12:26:57 -05:00
Andy Adamson f9c96fcc50 NFSv4.1 free slot before resending I/O to MDS
Fix a dynamic session slot leak where a slot is preallocated and I/O is
resent through the MDS.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-01-29 11:54:55 -05:00
Weston Andros Adamson 471252cd8b pnfs: fix BUG in filelayout_recover_commit_reqs
cond_resched_lock(cinfo->lock) is called everywhere else while holding
the cinfo->lock spinlock.  Not holding this lock while calling
transfer_commit_list in filelayout_recover_commit_reqs causes the BUG
below.

It's true that we can't hold this lock while calling pnfs_put_lseg,
because that might try to lock the inode lock - which might be the
same lock as cinfo->lock.

To reproduce, mount a 2 DS pynfs server and run an O_DIRECT command
that crosses a stripe boundary and is not page aligned, such as:

 dd if=/dev/zero of=/mnt/f bs=17000 count=1 oflag=direct

BUG: sleeping function called from invalid context at linux/fs/nfs/nfs4filelayout.c:1161
in_atomic(): 0, irqs_disabled(): 0, pid: 27, name: kworker/0:1
2 locks held by kworker/0:1/27:
 #0:  (events){.+.+.+}, at: [<ffffffff810501d7>] process_one_work+0x175/0x3a5
 #1:  ((&dreq->work)){+.+...}, at: [<ffffffff810501d7>] process_one_work+0x175/0x3a5
CPU: 0 PID: 27 Comm: kworker/0:1 Not tainted 3.13.0-rc3-branch-dros_testing+ #21
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/31/2013
Workqueue: events nfs_direct_write_schedule_work [nfs]
 0000000000000000 ffff88007a39bbb8 ffffffff81491256 ffff88007b87a130  ffff88007a39bbd8 ffffffff8105f103 ffff880079614000 ffff880079617d40  ffff88007a39bc20 ffffffffa011603e ffff880078988b98 0000000000000000
Call Trace:
 [<ffffffff81491256>] dump_stack+0x4d/0x66
 [<ffffffff8105f103>] __might_sleep+0x100/0x105
 [<ffffffffa011603e>] transfer_commit_list+0x94/0xf1 [nfs_layout_nfsv41_files]
 [<ffffffffa01160d6>] filelayout_recover_commit_reqs+0x3b/0x68 [nfs_layout_nfsv41_files]
 [<ffffffffa00ba53a>] nfs_direct_write_reschedule+0x9f/0x1d6 [nfs]
 [<ffffffff810705df>] ? mark_lock+0x1df/0x224
 [<ffffffff8106e617>] ? trace_hardirqs_off_caller+0x37/0xa4
 [<ffffffff8106e691>] ? trace_hardirqs_off+0xd/0xf
 [<ffffffffa00ba8f8>] nfs_direct_write_schedule_work+0x9d/0xb7 [nfs]
 [<ffffffff810501d7>] ? process_one_work+0x175/0x3a5
 [<ffffffff81050258>] process_one_work+0x1f6/0x3a5
 [<ffffffff810501d7>] ? process_one_work+0x175/0x3a5
 [<ffffffff8105187e>] worker_thread+0x149/0x1f5
 [<ffffffff81051735>] ? rescuer_thread+0x28d/0x28d
 [<ffffffff81056d74>] kthread+0xd2/0xda
 [<ffffffff81056ca2>] ? __kthread_parkme+0x61/0x61
 [<ffffffff8149e66c>] ret_from_fork+0x7c/0xb0
 [<ffffffff81056ca2>] ? __kthread_parkme+0x61/0x61

Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-01-21 14:12:18 -07:00
Niels de Vos 1e8968c5b0 NFS: dprintk() should not print negative fileids and inode numbers
A fileid in NFS is a uint64. There are some occurrences where dprintk()
outputs a signed fileid. This leads to confusion and more difficult to
read debugging (negative fileids matching positive inode numbers).

Signed-off-by: Niels de Vos <ndevos@redhat.com>
CC: Santosh Pradhan <spradhan@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-01-05 15:51:23 -05:00
Andy Adamson 0e20162ed1 NFSv4.1 Use MDS auth flavor for data server connection
Commit 4edaa308 "NFS: Use "krb5i" to establish NFSv4 state whenever possible"
uses the nfs_client cl_rpcclient for all state management operations, and
will use krb5i or auth_sys with no regard to the mount command authflavor
choice.

The MDS, as any NFSv4.1 mount point, uses the nfs_server rpc client for all
non-state management operations with a different nfs_server for each fsid
encountered traversing the mount point, each with a potentially different
auth flavor.

pNFS data servers are not mounted in the normal sense as there is no associated
nfs_server structure. Data servers can also export multiple fsids, each with
a potentially different auth flavor.

Data servers need to use the same authflavor as the MDS server rpc client for
non-state management operations. Populate a list of rpc clients with the MDS
server rpc client auth flavor for the DS to use.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-09-06 14:49:16 -04:00
Trond Myklebust cc668ab30b NFSv4: Add tracepoints for debugging reads and writes
Set up tracepoints to track read, write and commit, as well as
pNFS reads and writes and commits to the data server.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-08-22 08:58:26 -04:00
Trond Myklebust cd5875fefe NFSv4.1: Use layout credentials for get_deviceinfo calls
This is not strictly needed, since get_deviceinfo is not allowed to
return NFS4ERR_ACCESS or NFS4ERR_WRONG_CRED, but lets do it anyway
for consistency with other pNFS operations.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-06-06 16:24:37 -04:00
Trond Myklebust 9b20614988 NFSv4: The stateid must remain the same for replayed RPC calls
If we replay a READ or WRITE call, we should not be changing the
stateid. Currently, we may end up doing so, because the stateid
is only selected at xdr encode time.

This patch ensures that we select the stateid after we get an NFSv4.1
session slot, and that we keep that same stateid across retries.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-25 12:04:10 -04:00
Trond Myklebust c58c844187 NFS: Don't accept more reads/writes if the open context recovery failed
If the state recovery failed, we want to ensure that the application
doesn't try to use the same file descriptor for more reads or writes.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-25 12:04:10 -04:00
Trond Myklebust 5d422301f9 NFSv4: Fail I/O if the state recovery fails irrevocably
If state recovery fails with an ESTALE or a ENOENT, then we shouldn't
keep retrying. Instead, mark the stateid as being invalid and
fail the I/O with an EIO error.
For other operations such as POSIX and BSD file locking, truncate
etc, fail with an EBADF to indicate that this file descriptor is no
longer valid.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-25 12:04:10 -04:00
Trond Myklebust 2495680434 NFSv4.1: Always clear the NFS_INO_LAYOUTCOMMIT in layoutreturn
Note that clearing NFS_INO_LAYOUTCOMMIT is tricky, since it requires
you to also clear the NFS_LSEG_LAYOUTCOMMIT bits from the layout
segments.
The only two sites that need to do this are the ones that call
pnfs_return_layout() without first doing a layout commit.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Benny Halevy <bhalevy@tonian.com>
Cc: stable@vger.kernel.org
2013-03-21 10:31:21 -04:00
Benny Halevy 78f33277f9 pnfs: fix resend_to_mds for directio
Pass the directio request on pageio_init to clean up the API.

Percolate pg_dreq from original nfs_pageio_descriptor to the
pnfs_{read,write}_done_resend_to_mds and use it on respective
call to nfs_pageio_init_{read,write} on the newly created
nfs_pageio_descriptor.

Reproduced by command:
 mount -o vers=4.1 server:/ /mnt
 dd bs=128k count=8 if=/dev/zero of=/mnt/dd.out oflag=direct

BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
IP: [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
PGD 34786067 PUD 34794067 PMD 0
Oops: 0002 [#1] SMP
Modules linked in: nfs_layout_nfsv41_files nfsv4 nfs nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc btrfs zlib_deflate libcrc32c ipv6 autofs4
CPU 1
Pid: 259, comm: kworker/1:2 Not tainted 3.8.0-rc6 #2 Bochs Bochs
RIP: 0010:[<ffffffffa021a3a8>]  [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
RSP: 0018:ffff880038f8fa68  EFLAGS: 00010206
RAX: ffffffffa021a6a9 RBX: ffff880038f8fb48 RCX: 00000000000a0000
RDX: ffffffffa021e616 RSI: ffff8800385e9a40 RDI: 0000000000000028
RBP: ffff880038f8fa68 R08: ffffffff81ad6720 R09: ffff8800385e9510
R10: ffffffffa0228450 R11: ffff880038e87418 R12: ffff8800385e9a40
R13: ffff8800385e9a70 R14: ffff880038f8fb38 R15: ffffffffa0148878
FS:  0000000000000000(0000) GS:ffff88003e400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000028 CR3: 0000000034789000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process kworker/1:2 (pid: 259, threadinfo ffff880038f8e000, task ffff880038302480)
Stack:
 ffff880038f8fa78 ffffffffa021a6bf ffff880038f8fa88 ffffffffa021bb82
 ffff880038f8fae8 ffffffffa021f454 ffff880038f8fae8 ffffffff8109689d
 ffff880038f8fab8 ffffffff00000006 0000000000000000 ffff880038f8fb48
Call Trace:
 [<ffffffffa021a6bf>] nfs_direct_pgio_init+0x16/0x18 [nfs]
 [<ffffffffa021bb82>] nfs_pgheader_init+0x6a/0x6c [nfs]
 [<ffffffffa021f454>] nfs_generic_pg_writepages+0x51/0xf8 [nfs]
 [<ffffffff8109689d>] ? mark_held_locks+0x71/0x99
 [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
 [<ffffffffa021bc25>] nfs_pageio_doio+0x1a/0x43 [nfs]
 [<ffffffffa021be7c>] nfs_pageio_complete+0x16/0x2c [nfs]
 [<ffffffffa02608be>] pnfs_write_done_resend_to_mds+0x95/0xc5 [nfsv4]
 [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
 [<ffffffffa028e27f>] filelayout_reset_write+0x8c/0x99 [nfs_layout_nfsv41_files]
 [<ffffffffa028e5f9>] filelayout_write_done_cb+0x4d/0xc1 [nfs_layout_nfsv41_files]
 [<ffffffffa024587a>] nfs4_write_done+0x36/0x49 [nfsv4]
 [<ffffffffa021f996>] nfs_writeback_done+0x53/0x1cc [nfs]
 [<ffffffffa021fb1d>] nfs_writeback_done_common+0xe/0x10 [nfs]
 [<ffffffffa028e03d>] filelayout_write_call_done+0x28/0x2a [nfs_layout_nfsv41_files]
 [<ffffffffa01488a1>] rpc_exit_task+0x29/0x87 [sunrpc]
 [<ffffffffa014a0c9>] __rpc_execute+0x11d/0x3cc [sunrpc]
 [<ffffffff810969dc>] ? trace_hardirqs_on_caller+0x117/0x173
 [<ffffffffa014a39f>] rpc_async_schedule+0x27/0x32 [sunrpc]
 [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
 [<ffffffff8105f8c1>] process_one_work+0x226/0x422
 [<ffffffff8105f7f4>] ? process_one_work+0x159/0x422
 [<ffffffff81094757>] ? lock_acquired+0x210/0x249
 [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
 [<ffffffff810600d8>] worker_thread+0x126/0x1c4
 [<ffffffff8105ffb2>] ? manage_workers+0x240/0x240
 [<ffffffff81064ef8>] kthread+0xb1/0xb9
 [<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65
 [<ffffffff815206ec>] ret_from_fork+0x7c/0xb0
 [<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65
Code: 00 83 38 02 74 12 48 81 4b 50 00 00 01 00 c7 83 60 07 00 00 01 00 00 00 48 89 df e8 55 fe ff ff 5b 41 5c 5d c3 66 90 55 48 89 e5 <f0> ff 07 5d c3 55 48 89 e5 f0 ff 0f 0f 94 c0 84 c0 0f 95 c0 0f
RIP  [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
 RSP <ffff880038f8fa68>
CR2: 0000000000000028

Signed-off-by: Benny Halevy <bhalevy@tonian.com>
Cc: stable@kernel.org [>= 3.6]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-02-24 10:07:36 -05:00
Andy Adamson eb96d5c97b SUNRPC handle EKEYEXPIRED in call_refreshresult
Currently, when an RPCSEC_GSS context has expired or is non-existent
and the users (Kerberos) credentials have also expired or are non-existent,
the client receives the -EKEYEXPIRED error and tries to refresh the context
forever.  If an application is performing I/O, or other work against the share,
the application hangs, and the user is not prompted to refresh/establish their
credentials. This can result in a denial of service for other users.

Users are expected to manage their Kerberos credential lifetimes to mitigate
this issue.

Move the -EKEYEXPIRED handling into the RPC layer. Try tk_cred_retry number
of times to refresh the gss_context, and then return -EACCES to the application.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-12 15:36:02 -05:00
Trond Myklebust d9afbd1b08 NFSv4.1: Simplify the sequence setup
Nobody calls nfs4_setup_sequence or nfs41_setup_sequence without
also calling rpc_call_start() on success. This commit therefore
folds the rpc_call_start call into nfs41_setup_sequence().

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-06 00:30:48 +01:00
Trond Myklebust 76e697ba7e NFSv4.1: Move slot table and session struct definitions to nfs4session.h
Clean up. Gather NFSv4.1 slot definitions in fs/nfs/nfs4session.h.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-06 00:30:46 +01:00
Trond Myklebust bc5a89b337 NFSv4.1: Remove assertion BUG_ON()s from the files and generic layout code
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-11-04 14:43:39 -05:00
Trond Myklebust 1813badd98 NFSv4.1: Use kcalloc() to allocate zeroed arrays instead of kzalloc()
Don't circumvent the array size checks.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-15 10:49:43 -04:00
Trond Myklebust d527e5c15d NFSv4.1: Do not call pnfs_return_layout() from an rpciod context
Move the call to pnfs_return_layout() to the read and write rpc_release()
callbacks, so that it gets called from nfsiod, which is a more appropriate
context.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-15 10:49:43 -04:00
Trond Myklebust 8fcdc31b3d NFSv4.1: Kill nfs4_ds_disconnect()
There is nothing to prevent another thread from dereferencing ds->ds_clp
during or after the call to nfs4_ds_disconnect(), and Oopsing due to the
resulting NULL pointer.

Instead, we should just rely on filelayout_mark_devid_invalid() to keep
us out of trouble by avoiding that deviceid.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-15 10:49:42 -04:00
Trond Myklebust 8006bfba36 NFSv4.1: Get rid of the NFS_LAYOUT_DESTROYED state
We already have a mechanism for blocking LAYOUTGET by means of the
plh_block_lgets counter. The only "service" that NFS_LAYOUT_DESTROYED
provides at this point is to block layoutget once the layout segment
list is empty, which basically means that you have to wait until
the pnfs_layout_hdr is destroyed before you can do pNFS on that file
again.

This patch enables the reuse of the pnfs_layout_hdr if the layout
segment list is empty.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-09-28 16:03:16 -04:00
Trond Myklebust 965938b83b NFSv4.1: Get rid of pNFS layout state "NFS_LAYOUT_INVALID"
In all cases where we set NFS_LAYOUT_INVALID, we also set NFS_LAYOUT_DESTROYED.
Furthermore, in all cases where we test for NFS_LAYOUT_INVALID, we should
also be testing for NFS_LAYOUT_DESTROYED, since the latter means that
we hold no valid layout segments.
Ergo the two are redundant.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-09-28 16:03:12 -04:00
Trond Myklebust 1dfed2737d NFSv4.1: pNFS data servers may be temporarily offline
In cases where the pNFS data server is just temporarily out of service,
we want to mark it as such, and then try again later. Typically that will
be in cases of network connection errors etc.
This patch allows us to mark the devices as being "unavailable" for such
transient errors, and will make them available for retries after a
2 minute timeout period.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-09-28 16:03:09 -04:00
Trond Myklebust 78e4e05c64 NFSv4.1: Replace get_device_info() with filelayout_get_device_info()
Fix the namespace pollution issue.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-09-28 16:03:08 -04:00
Trond Myklebust 9369a431bc NFSv4.1: Cleanup; add "pnfs_" prefix to put_lseg() and get_lseg()
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-09-28 16:03:07 -04:00
Andy Adamson baf6c2a44a NFSv4.1 don't send LAYOUTCOMMIT if data resent through MDS
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-07-16 14:37:00 -04:00
Andy Adamson 82c7c7a5a9 NFSv4.1 return the LAYOUT for each file with failed DS connection I/O
First mark the deviceid invalid to prevent any future use. Then fence all
files involved in I/O to a DS with a connection error by sending a
LAYOUTRETURN.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-07-16 14:36:52 -04:00
Trond Myklebust 2f2c63bc22 NFS: Cleanup - only store the write verifier in struct nfs_page
The 'committed' field is not needed once we have put the struct nfs_page
on the right list.

Also correct the type of the verifier: it is not an array of __be32, but
simply an 8 byte long opaque array.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-06-28 17:20:50 -04:00
Trond Myklebust 9f594791dd NFSv4.1: Handle other occurrences of NFS4ERR_CONN_NOT_BOUND_TO_SESSION
Let nfs4_schedule_session_recovery() handle the details of choosing
between resetting the session, and other session related recovery.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-27 14:33:07 -04:00
Bryan Schumaker 497826af60 NFS: Fix compiler warnings
The "struct inode *inode" was only used in a dprintk, so compiling with
CONFIG_SUNRPC_DEBUG off triggers a warning.  To get around this, I
remove the "struct inode *inode" variable and instead change the
dprintk()s to use hdr->inode instead.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-22 16:43:04 -04:00
Andy Adamson bd4aeffb5b NFSv4.1 skip rpc_call_done only on disconnected DS slot_table_waitq tasks
We reset all I/O on a disconnected data server through the pgio layer indicated
by the NFS_IOHDR_REDO flag.

Differentiate between on-the-wire tasks returning with an error which must
call rpc_call_done and tasks woken from the data server slot_table_waitq
waiting for a session slot with a status of zero which call rpc_exit in
rpc_prepare and need to skip rpc_call_done.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-22 16:42:42 -04:00
Andy Adamson 996074cb8c NFSv4.1 Just use nfs_put_client in filelayout release
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-22 16:42:37 -04:00
Andy Adamson d42e78737c NFSv4.1 fix null state reference in filelayout_async_handle_error
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-22 16:42:28 -04:00
Trond Myklebust 53b8ee3464 NFSv4.1: Fix a bad reference count issue in the pNFS commit code
filelayout_scan_commit_lists needs to bump the reference count on
the struct nfs_page just like nfs_scan_commit_list().

Reported-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-22 16:36:27 -04:00
Andy Adamson 041245c88a NFSv4.1 resend LAYOUTGET on data server invalid layout errors
The "invalid layout" class of errors is handled by destroying the layout and
getting a new layout from the server.  Currently, the layout must be
destroyed before a new layout can be obtained.

This means that all references (e.g.lsegs) to the "to be destroyed" layout
header must be dropped before it can be destroyed. This in turn means waiting
for all in flight RPC's using the old layout as well as draining the data
server session slot table wait queue.

Set the NFS_LAYOUT_INVALID flag to redirect I/O to the MDS while waiting for
the old layout to be destroyed.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-19 17:55:33 -04:00
Andy Adamson b4a2967e52 NFSv4.1 dereference a disconnected data server client record
When the last DS io is processed, the data server client record will be
freed.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-19 17:55:32 -04:00
Andy Adamson 3a7936c3fc NFSv4.1 ref count nfs_client across filelayout data server io
Prepare to put a dis-connected DS client record.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-19 17:55:32 -04:00
Andy Adamson 0a57cdac3f NFSv4.1 send layoutreturn to fence disconnected data server
Let the MDS know that you are redirecting I/O from pNFS to MDS.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-19 17:55:31 -04:00
Andy Adamson 671fb89695 NFSv4.1 wake up all tasks on un-connected DS slot table waitq
The DS has a connection error (invalid deviceid). Drain the fore channel
slot table waitq.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-19 17:55:31 -04:00
Andy Adamson 0ad2f378e1 NFSv4.1 Check invalid deviceid upon slot table waitq wakeup
Tasks sleeping on the slot table waitq wake to the rpc_prepare_task state.
Reset the task for io through the MDS if the deviceid is invalid.

The reset functions put the io pages through the pageio layer which has the
advantage of re-coalescing which allows for the MDS and DS having different
r/wsizes. Exit the awakened task without executing the rpc_call_done routine.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-19 17:55:31 -04:00
Andy Adamson e7dd79af01 NFSv4.1: mark deviceid invalid on filelayout DS connection errors
This prevents the use of any layout for i/o that references the deviceid.
I/O is redirected through the MDS.

Redirect the unhandled failed I/O to the MDS without marking either the
layout or the deviceid invalid.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-19 17:54:20 -04:00
Andy Adamson 9f0ec176b3 NFSv4.1 set RPC_TASK_SOFTCONN for filelayout DS RPC calls
RPC_TASK_SOFTCONN returns connection errors to the caller which allows the pNFS
file layout to quickly try the MDS or perhaps another DS.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-19 17:54:19 -04:00
Andy Adamson 90fecfcb34 NFSv4.1 cleanup filelayout invalid layout handling
The invalid layout bits are should only be used to block LAYOUTGETs.

Do not invalidate a layout on deviceid invalidation.
Do not invalidate a layout on un-handled READ, WRITE, COMMIT errors.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-19 17:54:19 -04:00
Andy Adamson 554d458d79 NFSv4.1: cleanup filelayout invalid deviceid handling
Move the invalid deviceid test into nfs4_fl_prepare_ds, called by the
filelayout read, write, and commit routines. NFS4_DEVICE_ID_NEG_ENTRY
is no longer needed.
Remove redundant printk's - filelayout_mark_devid_invalid prints a KERN_WARNING.

An invalid device prevents pNFS io.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-19 17:54:18 -04:00
Fred Isaman df0117481c NFS: Prevent garbage cinfo->ds from leaking out
This is a bugfix that applies on top of the previous directio patches,
that fixes a bug introduced in "NFS: create struct nfs_commit_info".

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-04-27 14:10:39 -04:00
Fred Isaman 1763da1234 NFS: rewrite directio write to use async coalesce code
This also has the advantage that it allows directio to use pnfs.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-04-27 14:10:39 -04:00
Fred Isaman f453a54a01 NFS: create nfs_commit_completion_ops
Factors out the code that needs to change when directio
starts using these code paths.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-04-27 14:10:38 -04:00
Fred Isaman ea2cf2282b NFS: create struct nfs_commit_info
It is COMMIT that is handled the most differently between
the paged and direct paths.  Create a structure that encapsulates
everything either path needs to know about the commit state.

We could use void to hide some of the layout driver stuff, but
Trond suggests pulling it out to ensure type checking, given the
huge changes being made, and the fact that it doesn't interfere
with other drivers.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-04-27 14:10:38 -04:00
Fred Isaman 1825a0d08f NFS: prepare coalesce testing for directio
The coalesce code made assumptions that will no longer be true once
non-page aligned io occurs.  This introduces no change in
current behavior, but allows for more general situations to come.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-04-27 14:10:38 -04:00
Fred Isaman 6c75dc0d49 NFS: merge _full and _partial write rpc_ops
Decouple nfs_pgio_header and nfs_write_data, and have (possibly
multiple) nfs_write_datas each take a refcount on nfs_pgio_header.

For the moment keeps nfs_write_header as a way to preallocate a single
nfs_write_data with the nfs_pgio_header.  The code doesn't need this,
and would be prettier without, but given the amount of churn I am
already introducing I didn't want to play with tuning new mempools.

This also fixes bug in pnfs_ld_handle_write_error.  In the case of
desc->pg_bsize < PAGE_CACHE_SIZE, the pages list was empty, causing
replay attempt to do nothing.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-04-27 14:10:37 -04:00