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* sunrpc: Const-ify struct sv_serv_opsChuck Lever2017-08-241-5/+5
| | | | | | | | Close an attack vector by moving the arrays of per-server methods to read-only memory. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* sunrpc: mark all struct svc_version instances as constChristoph Hellwig2017-05-151-1/+1
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Trond Myklebust <trond.myklebust@primarydata.com>
* NFSv4: Fix callback server shutdownTrond Myklebust2017-04-271-8/+16
| | | | | | | | | | | We want to use kthread_stop() in order to ensure the threads are shut down before we tear down the nfs_callback_info in nfs_callback_down. Tested-and-reviewed-by: Kinglong Mee <kinglongmee@gmail.com> Reported-by: Kinglong Mee <kinglongmee@gmail.com> Fixes: bb6aeba736ba9 ("NFSv4.x: Switch to using svc_set_num_threads()...") Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* NFSv4.x/callback: Create the callback service through svc_create_pooledKinglong Mee2017-04-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As the comments for svc_set_num_threads() said, " Destroying threads relies on the service threads filling in rqstp->rq_task, which only the nfs ones do. Assumes the serv has been created using svc_create_pooled()." If creating service through svc_create(), the svc_pool_map_put() will be called in svc_destroy(), but the pool map isn't used. So that, the reference of pool map will be drop, the next using of pool map will get a zero npools. [ 137.992130] divide error: 0000 [#1] SMP [ 137.992148] Modules linked in: nfsd(E) nfsv4 nfs fscache fuse tun bridge stp llc ip_set nfnetlink vmw_vsock_vmci_transport vsock snd_seq_midi snd_seq_midi_event vmw_balloon coretemp crct10dif_pclmul crc32_pclmul ppdev ghash_clmulni_intel intel_rapl_perf joydev snd_ens1371 gameport snd_ac97_codec ac97_bus snd_seq snd_pcm snd_rawmidi snd_timer snd_seq_device snd soundcore parport_pc parport nfit acpi_cpufreq tpm_tis tpm_tis_core tpm vmw_vmci i2c_piix4 shpchp auth_rpcgss nfs_acl lockd(E) grace sunrpc(E) xfs libcrc32c vmwgfx drm_kms_helper ttm crc32c_intel drm e1000 mptspi scsi_transport_spi serio_raw mptscsih mptbase ata_generic pata_acpi [last unloaded: nfsd] [ 137.992336] CPU: 0 PID: 4514 Comm: rpc.nfsd Tainted: G E 4.11.0-rc8+ #536 [ 137.992777] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015 [ 137.993757] task: ffff955984101d00 task.stack: ffff9873c2604000 [ 137.994231] RIP: 0010:svc_pool_for_cpu+0x2b/0x80 [sunrpc] [ 137.994768] RSP: 0018:ffff9873c2607c18 EFLAGS: 00010246 [ 137.995227] RAX: 0000000000000000 RBX: ffff95598376f000 RCX: 0000000000000002 [ 137.995673] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9559944aec00 [ 137.996156] RBP: ffff9873c2607c18 R08: ffff9559944aec28 R09: 0000000000000000 [ 137.996609] R10: 0000000001080002 R11: 0000000000000000 R12: ffff95598376f010 [ 137.997063] R13: ffff95598376f018 R14: ffff9559944aec28 R15: ffff9559944aec00 [ 137.997584] FS: 00007f755529eb40(0000) GS:ffff9559bb600000(0000) knlGS:0000000000000000 [ 137.998048] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 137.998548] CR2: 000055f3aecd9660 CR3: 0000000084290000 CR4: 00000000001406f0 [ 137.999052] Call Trace: [ 137.999517] svc_xprt_do_enqueue+0xef/0x260 [sunrpc] [ 138.000028] svc_xprt_received+0x47/0x90 [sunrpc] [ 138.000487] svc_add_new_perm_xprt+0x76/0x90 [sunrpc] [ 138.000981] svc_addsock+0x14b/0x200 [sunrpc] [ 138.001424] ? recalc_sigpending+0x1b/0x50 [ 138.001860] ? __getnstimeofday64+0x41/0xd0 [ 138.002346] ? do_gettimeofday+0x29/0x90 [ 138.002779] write_ports+0x255/0x2c0 [nfsd] [ 138.003202] ? _copy_from_user+0x4e/0x80 [ 138.003676] ? write_recoverydir+0x100/0x100 [nfsd] [ 138.004098] nfsctl_transaction_write+0x48/0x80 [nfsd] [ 138.004544] __vfs_write+0x37/0x160 [ 138.004982] ? selinux_file_permission+0xd7/0x110 [ 138.005401] ? security_file_permission+0x3b/0xc0 [ 138.005865] vfs_write+0xb5/0x1a0 [ 138.006267] SyS_write+0x55/0xc0 [ 138.006654] entry_SYSCALL_64_fastpath+0x1a/0xa9 [ 138.007071] RIP: 0033:0x7f7554b9dc30 [ 138.007437] RSP: 002b:00007ffc9f92c788 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 138.007807] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f7554b9dc30 [ 138.008168] RDX: 0000000000000002 RSI: 00005640cd536640 RDI: 0000000000000003 [ 138.008573] RBP: 00007ffc9f92c780 R08: 0000000000000001 R09: 0000000000000002 [ 138.008918] R10: 0000000000000064 R11: 0000000000000246 R12: 0000000000000004 [ 138.009254] R13: 00005640cdbf77a0 R14: 00005640cdbf7720 R15: 00007ffc9f92c238 [ 138.009610] Code: 0f 1f 44 00 00 48 8b 87 98 00 00 00 55 48 89 e5 48 83 78 08 00 74 10 8b 05 07 42 02 00 83 f8 01 74 40 83 f8 02 74 19 31 c0 31 d2 <f7> b7 88 00 00 00 5d 89 d0 48 c1 e0 07 48 03 87 90 00 00 00 c3 [ 138.010664] RIP: svc_pool_for_cpu+0x2b/0x80 [sunrpc] RSP: ffff9873c2607c18 [ 138.011061] ---[ end trace b3468224cafa7d11 ]--- Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* Merge tag 'nfs-for-4.11-2' of git://git.linux-nfs.org/projects/anna/linux-nfsLinus Torvalds2017-03-171-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull NFS client fixes from Anna Schumaker: "We have a handful of stable fixes to fix kernel warnings and other bugs that have been around for a while. We've also found a few other reference counting bugs and memory leaks since the initial 4.11 pull. Stable Bugfixes: - Fix decrementing nrequests in NFS v4.2 COPY to fix kernel warnings - Prevent a double free in async nfs4_exchange_id() - Squelch a kbuild sparse complaint for xprtrdma Other Bugfixes: - Fix a typo (NFS_ATTR_FATTR_GROUP_NAME) that causes a memory leak - Fix a reference leak that causes kernel warnings - Make nfs4_cb_sv_ops static to fix a sparse warning - Respect a server's max size in CREATE_SESSION - Handle errors from nfs4_pnfs_ds_connect - Flexfiles layout shouldn't mark devices as unavailable" * tag 'nfs-for-4.11-2' of git://git.linux-nfs.org/projects/anna/linux-nfs: pNFS/flexfiles: never nfs4_mark_deviceid_unavailable pNFS: return status from nfs4_pnfs_ds_connect NFSv4.1 respect server's max size in CREATE_SESSION NFS prevent double free in async nfs4_exchange_id nfs: make nfs4_cb_sv_ops static xprtrdma: Squelch kbuild sparse complaint NFS: fix the fault nrequests decreasing for nfs_inode COPY NFSv4: fix a reference leak caused WARNING messages nfs4: fix a typo of NFS_ATTR_FATTR_GROUP_NAME
| * nfs: make nfs4_cb_sv_ops staticJason Yan2017-03-171-2/+2
| | | | | | | | | | | | | | | | | | | | Fixes the following sparse warning: fs/nfs/callback.c:235:21: warning: symbol 'nfs4_cb_sv_ops' was not declared. Should it be static? Signed-off-by: Jason Yan <yanaijie@huawei.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* | sched/headers: Prepare for new header dependencies before moving code to ↵Ingo Molnar2017-03-021-0/+1
|/ | | | | | | | | | | | | | | | | | | | <linux/sched/signal.h> We are going to split <linux/sched/signal.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/signal.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* NFSv4.x: hide array-bounds warningArnd Bergmann2016-11-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | A correct bugfix introduced a harmless warning that shows up with gcc-7: fs/nfs/callback.c: In function 'nfs_callback_up': fs/nfs/callback.c:214:14: error: array subscript is outside array bounds [-Werror=array-bounds] What happens here is that the 'minorversion == 0' check tells the compiler that we assume minorversion can be something other than 0, but when CONFIG_NFS_V4_1 is disabled that would be invalid and result in an out-of-bounds access. The added check for IS_ENABLED(CONFIG_NFS_V4_1) tells gcc that this really can't happen, which makes the code slightly smaller and also avoids the warning. The bugfix that introduced the warning is marked for stable backports, we want this one backported to the same releases. Fixes: 98b0f80c2396 ("NFSv4.x: Fix a refcount leak in nfs_callback_up_net") Cc: stable@vger.kernel.org # v3.7+ Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* NFSv4.x: Add kernel parameter to control the callback serverTrond Myklebust2016-09-191-1/+4
| | | | | | | | | | | Add support for the kernel parameter nfs.callback_nr_threads to set the number of threads that will be assigned to the callback channel. Add support for the kernel parameter nfs.nfs.max_session_cb_slots to set the maximum size of the callback channel slot table. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* NFSv4.x: Switch to using svc_set_num_threads() to manage the callback threadsTrond Myklebust2016-09-191-66/+13
| | | | | | | This will allow us to bump the number of callback threads at will. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* NFSv4.x: Fix up the global tracking of the callback serverTrond Myklebust2016-09-191-5/+9
| | | | | | | | Ensure that the nfs_callback_info[] array correctly tracks the struct svc_serv. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* SUNRPC: Initialise struct svc_serv backchannel fields during __svc_create()Trond Myklebust2016-09-191-3/+0
| | | | | | | Clean up. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* NFSv4.x: Set up struct svc_serv_ops for the callback channelTrond Myklebust2016-09-191-18/+39
| | | | | | | | In order to manage the threads using svc_set_num_threads, we need to fill in a few extra fields. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* NFSv4.x: Fix a refcount leak in nfs_callback_up_netTrond Myklebust2016-08-301-0/+1
| | | | | | | | On error, the callers expect us to return without bumping nn->cb_users[]. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Cc: stable@vger.kernel.org # v3.7+
* NFS: Enable client side NFSv4.1 backchannel to use other transportsChuck Lever2015-11-021-32/+8
| | | | | | | | | Forechannel transports get their own "bc_up" method to create an endpoint for the backchannel service. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> [Anna Schumaker: Add forward declaration of struct net to xprt.h] Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* Merge tag 'nfs-for-4.3-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds2015-09-071-4/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull NFS client updates from Trond Myklebust: "Highlights include: Stable patches: - Fix atomicity of pNFS commit list updates - Fix NFSv4 handling of open(O_CREAT|O_EXCL|O_RDONLY) - nfs_set_pgio_error sometimes misses errors - Fix a thinko in xs_connect() - Fix borkage in _same_data_server_addrs_locked() - Fix a NULL pointer dereference of migration recovery ops for v4.2 client - Don't let the ctime override attribute barriers. - Revert "NFSv4: Remove incorrect check in can_open_delegated()" - Ensure flexfiles pNFS driver updates the inode after write finishes - flexfiles must not pollute the attribute cache with attrbutes from the DS - Fix a protocol error in layoutreturn - Fix a protocol issue with NFSv4.1 CLOSE stateids Bugfixes + cleanups - pNFS blocks bugfixes from Christoph - Various cleanups from Anna - More fixes for delegation corner cases - Don't fsync twice for O_SYNC/IS_SYNC files - Fix pNFS and flexfiles layoutstats bugs - pnfs/flexfiles: avoid duplicate tracking of mirror data - pnfs: Fix layoutget/layoutreturn/return-on-close serialisation issues - pnfs/flexfiles: error handling retries a layoutget before fallback to MDS Features: - Full support for the OPEN NFS4_CREATE_EXCLUSIVE4_1 mode from Kinglong - More RDMA client transport improvements from Chuck - Removal of the deprecated ib_reg_phys_mr() and ib_rereg_phys_mr() verbs from the SUNRPC, Lustre and core infiniband tree. - Optimise away the close-to-open getattr if there is no cached data" * tag 'nfs-for-4.3-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (108 commits) NFSv4: Respect the server imposed limit on how many changes we may cache NFSv4: Express delegation limit in units of pages Revert "NFS: Make close(2) asynchronous when closing NFS O_DIRECT files" NFS: Optimise away the close-to-open getattr if there is no cached data NFSv4.1/flexfiles: Clean up ff_layout_write_done_cb/ff_layout_commit_done_cb NFSv4.1/flexfiles: Mark the layout for return in ff_layout_io_track_ds_error() nfs: Remove unneeded checking of the return value from scnprintf nfs: Fix truncated client owner id without proto type NFSv4.1/flexfiles: Mark layout for return if the mirrors are invalid NFSv4.1/flexfiles: RW layouts are valid only if all mirrors are valid NFSv4.1/flexfiles: Fix incorrect usage of pnfs_generic_mark_devid_invalid() NFSv4.1/flexfiles: Fix freeing of mirrors NFSv4.1/pNFS: Don't request a minimal read layout beyond the end of file NFSv4.1/pnfs: Handle LAYOUTGET return values correctly NFSv4.1/pnfs: Don't ask for a read layout for an empty file. NFSv4.1: Fix a protocol issue with CLOSE stateids NFSv4.1/flexfiles: Don't mark the entire deviceid as bad for file errors SUNRPC: Prevent SYN+SYNACK+RST storms SUNRPC: xs_reset_transport must mark the connection as disconnected NFSv4.1/pnfs: Ensure layoutreturn reserves space for the opaque payload ...
| * NFS: Remove duplicate svc_xprt_put from nfs41_callback_upKinglong Mee2015-08-121-4/+0
| | | | | | | | | | | | | | | | | | | | | | The xprt created by svc_create_xprt have be added to serv->sv_permsocks. So putting the xprt directly is useless. Otherwise, there is a more svc_xprt_put after the xprt be freed. v2, same as v1. Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* | nfsd/sunrpc: turn enqueueing a svc_xprt into a svc_serv operationJeff Layton2015-08-101-0/+1
| | | | | | | | | | | | | | | | | | | | For now, all services use svc_xprt_do_enqueue, but once we add workqueue-based service support, we'll need to do something different. Signed-off-by: Shirley Ma <shirley.ma@oracle.com> Acked-by: Jeff Layton <jlayton@primarydata.com> Tested-by: Shirley Ma <shirley.ma@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | nfsd/sunrpc: add a new svc_serv_ops struct and move sv_shutdown into itJeff Layton2015-08-101-1/+4
|/ | | | | | | | | | | | | In later patches we'll need to abstract out more operations on a per-service level, besides sv_shutdown and sv_function. Declare a new svc_serv_ops struct to hold these operations, and move sv_shutdown into this struct. Signed-off-by: Shirley Ma <shirley.ma@oracle.com> Acked-by: Jeff Layton <jlayton@primarydata.com> Tested-by: Shirley Ma <shirley.ma@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfs: deny backchannel RPCs with an incorrect authflavor instead of dropping themJeff Layton2015-06-111-3/+3
| | | | | | | | | | A drop should really only be done when the frame is malformed or we have reason to think that there is some sort of DoS going on. When we get an RPC with bad auth, we should send back an error instead. Cc: Andy Adamson <William.Adamson@netapp.com> Signed-off-by: Jeff Layton <jeff.layton@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* nfs: fix high load average due to callback thread sleepingJeff Layton2015-04-231-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | Chuck pointed out a problem that crept in with commit 6ffa30d3f734 (nfs: don't call blocking operations while !TASK_RUNNING). Linux counts tasks in uninterruptible sleep against the load average, so this caused the system's load average to be pinned at at least 1 when there was a NFSv4.1+ mount active. Not a huge problem, but it's probably worth fixing before we get too many complaints about it. This patch converts the code back to use TASK_INTERRUPTIBLE sleep, simply has it flush any signals on each loop iteration. In practice no one should really be signalling this thread at all, so I think this is reasonably safe. With this change, there's also no need to game the hung task watchdog so we can also convert the schedule_timeout call back to a normal schedule. Cc: <stable@vger.kernel.org> Reported-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Jeff Layton <jeff.layton@primarydata.com> Tested-by: Chuck Lever <chuck.lever@oracle.com> Fixes: commit 6ffa30d3f734 (“nfs: don't call blocking . . .”) Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* nfs: don't call blocking operations while !TASK_RUNNINGJeff Layton2015-01-301-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Bruce reported seeing this warning pop when mounting using v4.1: ------------[ cut here ]------------ WARNING: CPU: 1 PID: 1121 at kernel/sched/core.c:7300 __might_sleep+0xbd/0xd0() do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff810ff58f>] prepare_to_wait+0x2f/0x90 Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace sunrpc fscache ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_timer ppdev joydev snd virtio_console virtio_balloon pcspkr serio_raw parport_pc parport pvpanic floppy soundcore i2c_piix4 virtio_blk virtio_net qxl drm_kms_helper ttm drm virtio_pci virtio_ring ata_generic virtio pata_acpi CPU: 1 PID: 1121 Comm: nfsv4.1-svc Not tainted 3.19.0-rc4+ #25 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140709_153950- 04/01/2014 0000000000000000 000000004e5e3f73 ffff8800b998fb48 ffffffff8186ac78 0000000000000000 ffff8800b998fba0 ffff8800b998fb88 ffffffff810ac9da ffff8800b998fb68 ffffffff81c923e7 00000000000004d9 0000000000000000 Call Trace: [<ffffffff8186ac78>] dump_stack+0x4c/0x65 [<ffffffff810ac9da>] warn_slowpath_common+0x8a/0xc0 [<ffffffff810aca65>] warn_slowpath_fmt+0x55/0x70 [<ffffffff810ff58f>] ? prepare_to_wait+0x2f/0x90 [<ffffffff810ff58f>] ? prepare_to_wait+0x2f/0x90 [<ffffffff810dd2ad>] __might_sleep+0xbd/0xd0 [<ffffffff8124c973>] kmem_cache_alloc_trace+0x243/0x430 [<ffffffff810d941e>] ? groups_alloc+0x3e/0x130 [<ffffffff810d941e>] groups_alloc+0x3e/0x130 [<ffffffffa0301b1e>] svcauth_unix_accept+0x16e/0x290 [sunrpc] [<ffffffffa0300571>] svc_authenticate+0xe1/0xf0 [sunrpc] [<ffffffffa02fc564>] svc_process_common+0x244/0x6a0 [sunrpc] [<ffffffffa02fd044>] bc_svc_process+0x1c4/0x260 [sunrpc] [<ffffffffa03d5478>] nfs41_callback_svc+0x128/0x1f0 [nfsv4] [<ffffffff810ff970>] ? wait_woken+0xc0/0xc0 [<ffffffffa03d5350>] ? nfs4_callback_svc+0x60/0x60 [nfsv4] [<ffffffff810d45bf>] kthread+0x11f/0x140 [<ffffffff810ea815>] ? local_clock+0x15/0x30 [<ffffffff810d44a0>] ? kthread_create_on_node+0x250/0x250 [<ffffffff81874bfc>] ret_from_fork+0x7c/0xb0 [<ffffffff810d44a0>] ? kthread_create_on_node+0x250/0x250 ---[ end trace 675220a11e30f4f2 ]--- nfs41_callback_svc does most of its work while in TASK_INTERRUPTIBLE, which is just wrong. Fix that by finishing the wait immediately if we've found that the list has something on it. Also, we don't expect this kthread to accept signals, so we should be using a TASK_UNINTERRUPTIBLE sleep instead. That however, opens us up hung task warnings from the watchdog, so have the schedule_timeout wake up every 60s if there's no callback activity. Reported-by: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Jeff Layton <jlayton@primarydata.com> Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* nfs: do not start the callback thread until we set rqstp->rq_taskTrond Myklebust2014-09-021-1/+2
| | | | | | | | This fixes an Oopsable race when starting up the callback server. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Reviewed-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfs: Ensure that nfs_callback_start_svc sets the server rq_task...Trond Myklebust2014-08-171-0/+1
| | | | | Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfs4: copy acceptor name from context to nfs_clientJeff Layton2014-07-121-0/+12
| | | | | | | | | | | | | | | The current CB_COMPOUND handling code tries to compare the principal name of the request with the cl_hostname in the client. This is not guaranteed to ever work, particularly if the client happened to mount a CNAME of the server or a non-fqdn. Fix this by instead comparing the cr_principal string with the acceptor name that we get from gssd. In the event that gssd didn't send one down (i.e. it was too old), then we fall back to trying to use the cl_hostname as we do today. Signed-off-by: Jeff Layton <jlayton@poochiereds.net> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* nfs: Use PTR_ERR_OR_ZERO in 'nfs41_callback_up' functionGeyslan G. Bem2013-10-281-2/+1
| | | | | | | Use 'PTR_ERR_OR_ZERO()' rather than 'IS_ERR(...) ? PTR_ERR(...) : 0'. Signed-off-by: Geyslan G. Bem <geyslan@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Merge tag 'nfs-for-3.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds2013-07-091-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull NFS client updates from Trond Myklebust: "Feature highlights include: - Add basic client support for NFSv4.2 - Add basic client support for Labeled NFS (selinux for NFSv4.2) - Fix the use of credentials in NFSv4.1 stateful operations, and add support for NFSv4.1 state protection. Bugfix highlights: - Fix another NFSv4 open state recovery race - Fix an NFSv4.1 back channel session regression - Various rpc_pipefs races - Fix another issue with NFSv3 auth negotiation Please note that Labeled NFS does require some additional support from the security subsystem. The relevant changesets have all been reviewed and acked by James Morris." * tag 'nfs-for-3.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (54 commits) NFS: Set NFS_CS_MIGRATION for NFSv4 mounts NFSv4.1 Refactor nfs4_init_session and nfs4_init_channel_attrs nfs: have NFSv3 try server-specified auth flavors in turn nfs: have nfs_mount fake up a auth_flavs list when the server didn't provide it nfs: move server_authlist into nfs_try_mount_request nfs: refactor "need_mount" code out of nfs_try_mount SUNRPC: PipeFS MOUNT notification optimization for dying clients SUNRPC: split client creation routine into setup and registration SUNRPC: fix races on PipeFS UMOUNT notifications SUNRPC: fix races on PipeFS MOUNT notifications NFSv4.1 use pnfs_device maxcount for the objectlayout gdia_maxcount NFSv4.1 use pnfs_device maxcount for the blocklayout gdia_maxcount NFSv4.1 Fix gdia_maxcount calculation to fit in ca_maxresponsesize NFS: Improve legacy idmapping fallback NFSv4.1 end back channel session draining NFS: Apply v4.1 capabilities to v4.2 NFSv4.1: Clean up layout segment comparison helper names NFSv4.1: layout segment comparison helpers should take 'const' parameters NFSv4: Move the DNS resolver into the NFSv4 module rpc_pipefs: only set rpc_dentry_ops if d_op isn't already set ...
| * NFSv4.2: Added NFS v4.2 support to the NFS clientSteve Dickson2013-06-081-0/+1
| | | | | | | | | | | | | | | | | | This enable NFSv4.2 support. To enable this code the CONFIG_NFS_V4_2 Kconfig define needs to be set and the -o v4.2 mount option need to be used. Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | drivers: avoid parsing names as kthread_run() format stringsKees Cook2013-07-031-3/+2
|/ | | | | | | | | | Calling kthread_run with a single name parameter causes it to be handled as a format string. Many callers are passing potentially dynamic string content, so use "%s" in those cases to avoid any potential accidents. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nfs: allow the v4.1 callback thread to freezeJeff Layton2013-04-051-0/+3
| | | | | | | | | | | The v4.1 callback thread has set_freezable() at the top, but it doesn't ever try to freeze within the loop. Have it call try_to_freeze() at the top of the loop. If a freeze event occurs, recheck kthread_should_stop() after thawing. Reported-by: Yanchuan Nian <ycnian@gmail.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Fix the return value for nfs_callback_start_svcTrond Myklebust2012-10-161-1/+1
| | | | | | | | returning PTR_ERR(cb_info->task) just after we have set it to NULL looks like a typo... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Stanislav Kinsbursky <skinsbursky@parallels.com>
* Merge branch 'for-3.7' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2012-10-131-14/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull nfsd update from J Bruce Fields: "Another relatively quiet cycle. There was some progress on my remaining 4.1 todo's, but a couple of them were just of the form "check that we do X correctly", so didn't have much affect on the code. Other than that, a bunch of cleanup and some bugfixes (including an annoying NFSv4.0 state leak and a busy-loop in the server that could cause it to peg the CPU without making progress)." * 'for-3.7' of git://linux-nfs.org/~bfields/linux: (46 commits) UAPI: (Scripted) Disintegrate include/linux/sunrpc UAPI: (Scripted) Disintegrate include/linux/nfsd nfsd4: don't allow reclaims of expired clients nfsd4: remove redundant callback probe nfsd4: expire old client earlier nfsd4: separate session allocation and initialization nfsd4: clean up session allocation nfsd4: minor free_session cleanup nfsd4: new_conn_from_crses should only allocate nfsd4: separate connection allocation and initialization nfsd4: reject bad forechannel attrs earlier nfsd4: enforce per-client sessions/no-sessions distinction nfsd4: set cl_minorversion at create time nfsd4: don't pin clientids to pseudoflavors nfsd4: fix bind_conn_to_session xdr comment nfsd4: cast readlink() bug argument NFSD: pass null terminated buf to kstrtouint() nfsd: remove duplicate init in nfsd4_cb_recall nfsd4: eliminate redundant nfs4_free_stateid fs/nfsd/nfs4idmap.c: adjust inconsistent IS_ERR and PTR_ERR ...
| * svcrpc: remove handling of unknown errors from svc_recvJ. Bruce Fields2012-08-211-14/+2
| | | | | | | | | | | | | | | | | | svc_recv() returns only -EINTR or -EAGAIN. If we really want to worry about the case where it has a bug that causes it to return something else, we could stick a WARN() in svc_recv. But it's silly to require every caller to have all this boilerplate to handle that case. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | NFSv4: Fix the minor version callback channel startupTrond Myklebust2012-10-011-14/+13
| | | | | | | | | | | | | | The current spaghetti code confuses some versions of gcc (and just looks ugly as hell)! Clean up... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: add debug messages to callback down functionStanislav Kinsbursky2012-10-011-0/+2
| | | | | | | | | | Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: callback per-net usage counting introducedStanislav Kinsbursky2012-10-011-2/+17
| | | | | | | | | | | | | | | | This patch also introduces refcount-aware nfs_callback_down_net() wrapper for svc_shutdown_net(). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: make nfs_callback_tcpport6 per network contextStanislav Kinsbursky2012-10-011-4/+2
| | | | | | | | | | Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: make nfs_callback_tcpport per network contextStanislav Kinsbursky2012-10-011-2/+4
| | | | | | | | | | Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: callback up - users counting cleanupStanislav Kinsbursky2012-10-011-12/+10
| | | | | | | | | | | | | | | | | | | | Usage coutner now increased only is the service was started sccessfully. Even if service is running already, then goto is not required anymore, because service creation and start will be skipped. With this patch code looks clearer. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: callback service start function introducedStanislav Kinsbursky2012-10-011-32/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This is just a code move, which from my POW makes code looks better. I.e. now on start we have 3 different stages: 1) Service creation. 2) Service per-net data allocation. 3) Service start. Patch also renames goto label "out_err:" into "err_start:" to reflect new changes. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: callback up - transport backchannel cleanupStanislav Kinsbursky2012-10-011-17/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | No need to assign transports backchannel server explicitly in nfs41_callback_up() - there is nfs_callback_bc_serv() function for this. By using it, nfs4_callback_up() and nfs41_callback_up() can be called without transport argument. Note: service have to be passed to nfs_callback_bc_serv() instead of callback, since callback link can be uninitialized. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: move per-net callback thread initialization to nfs_callback_up_net()Stanislav Kinsbursky2012-10-011-47/+86
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | v4: 1) Callback transport creation routine selection by version simlified. This new function in now called before nfs_minorversion_callback_svc_setup()). Also few small changes: 1) current network namespace in nfs_callback_up() was replaced by transport net. 2) svc_shutdown_net() was moved prior to callback usage counter decrement (because in case of per-net data allocation faulure svc_shutdown_net() have to be skipped). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: callback service creation function introducedStanislav Kinsbursky2012-10-011-14/+49
| | | | | | | | | | | | | | | | | | This function creates service if it's not exist, or increase usage counter of the existent, and returns pointer to it. Usage counter will be droppepd by svc_destroy() later in nfs_callback_up(). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: pass net to nfs_callback_down()Stanislav Kinsbursky2012-10-011-2/+2
|/ | | | | Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: increase number of permitted callback connections.NeilBrown2012-07-311-0/+4
| | | | | | | | | | | | | | | | | | | | By default a sunrpc service is limited to (N+3)*20 connections where N is the number of threads. This is 80 when N==1. If this number is exceeded a warning is printed suggesting that the number of threads be increased. However with services which run a single thread, this is impossible. For such services there is a ->sv_maxconn setting that can be used to forcibly increase the limit, and silence the message. This is used by lockd. The nfs client uses a sunrpc service to handle callbacks and it too is single-threaded, so to avoid the useless messages, and to allow a reasonable number of concurrent connections, we need to set ->sv_maxconn. 1024 seems like a good number. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Keep module parameters in the generic NFS clientBryan Schumaker2012-07-301-24/+0
| | | | | Otherwise we break backwards compatibility when v4 becomes a modules. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: hard-code init_net for NFS callback transportsStanislav Kinsbursky2012-06-141-6/+5
| | | | | | | | | | | In case of destroying mount namespace on child reaper exit, nsproxy is zeroed to the point already. So, dereferencing of it is invalid. This patch hard-code "init_net" for all network namespace references for NFS callback services. This will be fixed with proper NFS callback containerization. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: move principal name into svc_credJ. Bruce Fields2012-05-311-1/+1
| | | | | | | | Instead of keeping the principal name associated with a request in a structure that's private to auth_gss and using an accessor function, move it to svc_cred. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* SUNRPC: move per-net operations from svc_destroy()Stanislav Kinsbursky2012-05-311-0/+3
| | | | | | | | | | | | | | | | The idea is to separate service destruction and per-net operations, because these are two different things and the mix looks ugly. Notes: 1) For NFS server this patch looks ugly (sorry for that). But these place will be rewritten soon during NFSd containerization. 2) LockD per-net counter increase int lockd_up() was moved prior to make_socks() to make lockd_down_net() call safe in case of error. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* SUNRPC: new svc_bind() routine introducedStanislav Kinsbursky2012-05-311-0/+8
| | | | | | | | | | | | | | | This new routine is responsible for service registration in a specified network context. The idea is to separate service creation from per-net operations. Note also: since registering service with svc_bind() can fail, the service will be destroyed and during destruction it will try to unregister itself from rpcbind. In this case unregistration has to be skipped. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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