This fixes couple of races which lead to infinite wait of park completion
with the following backtraces:
[20801.303319] Call Trace:
[20801.303321] ? __schedule+0x284/0x650
[20801.303323] schedule+0x33/0xc0
[20801.303324] schedule_timeout+0x1bc/0x210
[20801.303326] ? schedule+0x3d/0xc0
[20801.303327] ? schedule_timeout+0x1bc/0x210
[20801.303329] ? preempt_count_add+0x79/0xb0
[20801.303330] wait_for_completion+0xa5/0x120
[20801.303331] ? wake_up_q+0x70/0x70
[20801.303333] kthread_park+0x48/0x80
[20801.303335] io_finish_async+0x2c/0x70
[20801.303336] io_ring_ctx_wait_and_kill+0x95/0x180
[20801.303338] io_uring_release+0x1c/0x20
[20801.303339] __fput+0xad/0x210
[20801.303341] task_work_run+0x8f/0xb0
[20801.303342] exit_to_usermode_loop+0xa0/0xb0
[20801.303343] do_syscall_64+0xe0/0x100
[20801.303349] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[20801.303380] Call Trace:
[20801.303383] ? __schedule+0x284/0x650
[20801.303384] schedule+0x33/0xc0
[20801.303386] io_sq_thread+0x38a/0x410
[20801.303388] ? __switch_to_asm+0x40/0x70
[20801.303390] ? wait_woken+0x80/0x80
[20801.303392] ? _raw_spin_lock_irqsave+0x17/0x40
[20801.303394] ? io_submit_sqes+0x120/0x120
[20801.303395] kthread+0x112/0x130
[20801.303396] ? kthread_create_on_node+0x60/0x60
[20801.303398] ret_from_fork+0x35/0x40
o kthread_park() waits for park completion, so io_sq_thread() loop
should check kthread_should_park() along with khread_should_stop(),
otherwise if kthread_park() is called before prepare_to_wait()
the following schedule() never returns:
CPU#0 CPU#1
io_sq_thread_stop(): io_sq_thread():
while(!kthread_should_stop() && !ctx->sqo_stop) {
ctx->sqo_stop = 1;
kthread_park()
prepare_to_wait();
if (kthread_should_stop() {
}
schedule(); <<< nobody checks park flag,
<<< so schedule and never return
o if the flag ctx->sqo_stop is observed by the io_sq_thread() loop
it is quite possible, that kthread_should_park() check and the
following kthread_parkme() is never called, because kthread_park()
has not been yet called, but few moments later is is called and
waits there for park completion, which never happens, because
kthread has already exited:
CPU#0 CPU#1
io_sq_thread_stop(): io_sq_thread():
ctx->sqo_stop = 1;
while(!kthread_should_stop() && !ctx->sqo_stop) {
<<< observe sqo_stop and exit the loop
}
if (kthread_should_park())
kthread_parkme(); <<< never called, since was
<<< never parked
kthread_park() <<< waits forever for park completion
In the current patch we quit the loop by only kthread_should_park()
check (kthread_park() is synchronous, so kthread_should_stop() is
never observed), and we abandon ->sqo_stop flag, since it is racy.
At the end of the io_sq_thread() we unconditionally call parmke(),
since we've exited the loop by the park flag.
Signed-off-by: Roman Penyaev <rpenyaev@suse.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
We always pass in 0 for the cqe flags argument, since the support for
"this read hit page cache" hint was dropped.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The test case we have is rightfully failing with the current kernel:
io_uring_setup(1, 0x7ffe2cafebe0), flags: IORING_SETUP_SQPOLL|IORING_SETUP_SQ_AFF, resv: 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000, sq_thread_cpu: 4
expected -1, got 3
This is in a vm, and CPU3 is the last valid one, hence asking for 4
should fail the setup with -EINVAL, not succeed. The problem is that
we're using array_index_nospec() with nr_cpu_ids as the index, hence we
wrap and end up using CPU0 instead of CPU4. This makes the setup
succeed where it should be failing.
We don't need to use array_index_nospec() as we're not indexing any
array with this. Instead just compare with nr_cpu_ids directly. This
is fine as we're checking with cpu_online() afterwards.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
When punting to workers the SQE gets copied after the initial try.
There is a race condition between reading SQE data for the initial try
and copying it for punting it to the workers.
For example io_rw_done calls kiocb->ki_complete even if it was prepared
for IORING_OP_FSYNC (and would be NULL).
The easiest solution for now is to alway prepare again in the worker.
req->file is safe to prepare though as long as it is checked before use.
Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
- fscrypt framework usage updates
- One huge fix for xattr unlink
- Cleanup of fscrypt ifdefs
- Fix for our new UBIFS auth feature
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Merge tag 'upstream-5.2-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/rw/ubifs
Pull UBI/UBIFS updates from Richard Weinberger:
- fscrypt framework usage updates
- One huge fix for xattr unlink
- Cleanup of fscrypt ifdefs
- Fix for our new UBIFS auth feature
* tag 'upstream-5.2-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
ubi: wl: Fix uninitialized variable
ubifs: Drop unnecessary setting of zbr->znode
ubifs: Remove ifdefs around CONFIG_UBIFS_ATIME_SUPPORT
ubifs: Remove #ifdef around CONFIG_FS_ENCRYPTION
ubifs: Limit number of xattrs per inode
ubifs: orphan: Handle xattrs like files
ubifs: journal: Handle xattrs like files
ubifs: find.c: replace swap function with built-in one
ubifs: Do not skip hash checking in data nodes
ubifs: work around high stack usage with clang
ubifs: remove unused function __ubifs_shash_final
ubifs: remove unnecessary #ifdef around fscrypt_ioctl_get_policy()
ubifs: remove unnecessary calls to set up directory key
- Kconfig cleanups
- Fix cpu_all_mask() usage
- Various bug fixes
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Merge tag 'for-linus-5.2-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/rw/uml
Pull UML updates from Richard Weinberger:
- Kconfig cleanups
- Fix cpu_all_mask() usage
- Various bug fixes
* tag 'for-linus-5.2-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: irq: don't set the chip for all irqs
um: define set_pte_at() as a static inline function, not a macro
um: remove uses of variable length arrays
um: remove unused variable
uml: fix a boot splat wrt use of cpu_all_mask
um: Do not unlock mutex that is not hold.
hostfs: fix mismatch between link_file definition and declaration
arch: um: drivers: Kconfig: pedantic formatting
arch: um: Kconfig: pedantic indention cleanups
um: Revert to using stack for pt_regs in signal handling
Pull vfs mount fix from Al Viro:
"Fix for umount -l/mount --move race caught by syzbot yesterday..."
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
do_move_mount(): fix an unsafe use of is_anon_ns()
Stable bugfixes:
- Fall back to MDS if no deviceid is found rather than aborting # v4.11+
- NFS4: Fix v4.0 client state corruption when mount
Features:
- Much improved handling of soft mounts with NFS v4.0
- Reduce risk of false positive timeouts
- Faster failover of reads and writes after a timeout
- Added a "softerr" mount option to return ETIMEDOUT instead of
EIO to the application after a timeout
- Increase number of xprtrdma backchannel requests
- Add additional xprtrdma tracepoints
- Improved send completion batching for xprtrdma
Other bugfixes and cleanups:
- Return -EINVAL when NFS v4.2 is passed an invalid dedup mode
- Reduce usage of GFP_ATOMIC pages in SUNRPC
- Various minor NFS over RDMA cleanups and bugfixes
- Use the correct container namespace for upcalls
- Don't share superblocks between user namespaces
- Various other container fixes
- Make nfs_match_client() killable to prevent soft lockups
- Don't mark all open state for recovery when handling recallable state revoked flag
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Merge tag 'nfs-for-5.2-1' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client updates from Anna Schumaker:
"Highlights include:
Stable bugfixes:
- Fall back to MDS if no deviceid is found rather than aborting # v4.11+
- NFS4: Fix v4.0 client state corruption when mount
Features:
- Much improved handling of soft mounts with NFS v4.0:
- Reduce risk of false positive timeouts
- Faster failover of reads and writes after a timeout
- Added a "softerr" mount option to return ETIMEDOUT instead of
EIO to the application after a timeout
- Increase number of xprtrdma backchannel requests
- Add additional xprtrdma tracepoints
- Improved send completion batching for xprtrdma
Other bugfixes and cleanups:
- Return -EINVAL when NFS v4.2 is passed an invalid dedup mode
- Reduce usage of GFP_ATOMIC pages in SUNRPC
- Various minor NFS over RDMA cleanups and bugfixes
- Use the correct container namespace for upcalls
- Don't share superblocks between user namespaces
- Various other container fixes
- Make nfs_match_client() killable to prevent soft lockups
- Don't mark all open state for recovery when handling recallable
state revoked flag"
* tag 'nfs-for-5.2-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (69 commits)
SUNRPC: Rebalance a kref in auth_gss.c
NFS: Fix a double unlock from nfs_match,get_client
nfs: pass the correct prototype to read_cache_page
NFSv4: don't mark all open state for recovery when handling recallable state revoked flag
SUNRPC: Fix an error code in gss_alloc_msg()
SUNRPC: task should be exit if encode return EKEYEXPIRED more times
NFS4: Fix v4.0 client state corruption when mount
PNFS fallback to MDS if no deviceid found
NFS: make nfs_match_client killable
lockd: Store the lockd client credential in struct nlm_host
NFS: When mounting, don't share filesystems between different user namespaces
NFS: Convert NFSv2 to use the container user namespace
NFSv4: Convert the NFS client idmapper to use the container user namespace
NFS: Convert NFSv3 to use the container user namespace
SUNRPC: Use namespace of listening daemon in the client AUTH_GSS upcall
SUNRPC: Use the client user namespace when encoding creds
NFS: Store the credential of the mount process in the nfs_server
SUNRPC: Cache cred of process creating the rpc_client
xprtrdma: Remove stale comment
xprtrdma: Update comments that reference ib_drain_qp
...
Now that nfs_match_client drops the nfs_client_lock, we should be
careful
to always return it in the same condition: locked.
Fixes: 950a578c61 ("NFS: make nfs_match_client killable")
Reported-by: syzbot+228a82b263b5da91883d@syzkaller.appspotmail.com
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Fix the callbacks NFS passes to read_cache_page to actually have the
proper type expected. Casting around function pointers can easily
hide typing bugs, and defeats control flow protection.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Only delegations and layouts can be recalled, so it shouldn't be
necessary to recover all opens when handling the status bit
SEQ4_STATUS_RECALLABLE_STATE_REVOKED. We'll still wind up calling
nfs41_open_expired() when a TEST_STATEID returns NFS4ERR_DELEG_REVOKED.
Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Reviewed-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
stat command with soft mount never return after server is stopped.
When alloc a new client, the state of the client will be set to
NFS4CLNT_LEASE_EXPIRED.
When the server is stopped, the state manager will work, and accord
the state to recover. But the state is NFS4CLNT_LEASE_EXPIRED, it
will drain the slot table and lead other task to wait queue, until
the client recovered. Then the stat command is hung.
When discover server trunking, the client will renew the lease,
but check the client state, it lead the client state corruption.
So, we need to call state manager to recover it when detect server
ip trunking.
Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
If we fail to find a good deviceid while trying to pnfs instead of
propogating an error back fallback to doing IO to the MDS. Currently,
code with fals the IO with EINVAL.
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Fixes: 8d40b0f148 ("NFS filelayout:call GETDEVICEINFO after pnfs_layout_process completes"
Cc: stable@vger.kernel.org # v4.11+
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
the pagecache" patch series which greatly improves our small IO
performance and helps us pass more xfstests than before.
fix: orangefs: truncate before updating size
Pagecache series: all the rest
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Merge tag 'for-linus-5.2-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux
Pull orangefs updates from Mike Marshall:
"This includes one fix and our "Orangefs through the pagecache" patch
series which greatly improves our small IO performance and helps us
pass more xfstests than before.
Fix:
- orangefs: truncate before updating size
Pagecache series:
- all the rest"
* tag 'for-linus-5.2-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux: (23 commits)
orangefs: truncate before updating size
orangefs: copy Orangefs-sized blocks into the pagecache if possible.
orangefs: pass slot index back to readpage.
orangefs: remember count when reading.
orangefs: add orangefs_revalidate_mapping
orangefs: implement writepages
orangefs: write range tracking
orangefs: avoid fsync service operation on flush
orangefs: skip inode writeout if nothing to write
orangefs: move do_readv_writev to direct_IO
orangefs: do not return successful read when the client-core disappeared
orangefs: implement writepage
orangefs: migrate to generic_file_read_iter
orangefs: service ops done for writeback are not killable
orangefs: remove orangefs_readpages
orangefs: reorganize setattr functions to track attribute changes
orangefs: let setattr write to cached inode
orangefs: set up and use backing_dev_info
orangefs: hold i_lock during inode_getattr
orangefs: update attributes rather than relying on server
...
What triggers it is a race between mount --move and umount -l
of the source; we should reject it (the source is parentless *and*
not the root of anon namespace at that), but the check for namespace
being an anon one is broken in that case - is_anon_ns() needs
ns to be non-NULL. Better fixed here than in is_anon_ns(), since
the rest of the callers is guaranteed to get a non-NULL argument...
Reported-by: syzbot+494c7ddf66acac0ad747@syzkaller.appspotmail.com
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
"gfs2: Fix loop in gfs2_rbm_find (v2)"
A rework of a fix we ended up reverting in 5.0 because of an iozone
performance regression.
"gfs2: read journal in large chunks" and
"gfs2: fix race between gfs2_freeze_func and unmount"
An improved version of a commit we also ended up reverting in 5.0
because of a regression in xfstest generic/311. It turns out that the
journal changes were mostly innocent and that unfreeze didn't wait for
the freeze to complete, which caused the filesystem to be unmounted
before it was actually idle.
"gfs2: Fix occasional glock use-after-free"
"gfs2: Fix iomap write page reclaim deadlock"
"gfs2: Fix lru_count going negative"
Fixes for various problems reported and partially fixed by Citrix
engineers. Thank you very much.
"gfs2: clean_journal improperly set sd_log_flush_head"
Another fix from Bob.
A few other minor cleanups.
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Merge tag 'gfs2-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull GFS2 updates from Andreas Gruenbacher:
"We've got the following patches ready for this merge window:
- "gfs2: Fix loop in gfs2_rbm_find (v2)"
A rework of a fix we ended up reverting in 5.0 because of an
iozone performance regression.
- "gfs2: read journal in large chunks"
"gfs2: fix race between gfs2_freeze_func and unmount"
An improved version of a commit we also ended up reverting in 5.0
because of a regression in xfstest generic/311. It turns out that
the journal changes were mostly innocent and that unfreeze didn't
wait for the freeze to complete, which caused the filesystem to be
unmounted before it was actually idle.
- "gfs2: Fix occasional glock use-after-free"
"gfs2: Fix iomap write page reclaim deadlock"
"gfs2: Fix lru_count going negative"
Fixes for various problems reported and partially fixed by Citrix
engineers. Thank you very much.
- "gfs2: clean_journal improperly set sd_log_flush_head"
Another fix from Bob.
- .. and a few other minor cleanups"
* tag 'gfs2-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
gfs2: read journal in large chunks
gfs2: Fix iomap write page reclaim deadlock
gfs2: fix race between gfs2_freeze_func and unmount
gfs2: Rename gfs2_trans_{add_unrevoke => remove_revoke}
gfs2: Rename sd_log_le_{revoke,ordered}
gfs2: Remove unnecessary extern declarations
gfs2: Remove misleading comments in gfs2_evict_inode
gfs2: Replace gl_revokes with a GLF flag
gfs2: Fix occasional glock use-after-free
gfs2: clean_journal improperly set sd_log_flush_head
gfs2: Fix lru_count going negative
gfs2: Fix loop in gfs2_rbm_find (v2)
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Merge tag '5.2-smb3' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"CIFS/SMB3 changes:
- three fixes for stable
- add fiemap support
- improve zero-range support
- various RDMA (smb direct fixes)
I have an additional set of fixes (for improved handling of sparse
files, mode bits, POSIX extensions) that are still being tested that
are not included in this pull request but I expect to send in the next
week"
* tag '5.2-smb3' of git://git.samba.org/sfrench/cifs-2.6: (29 commits)
cifs: update module internal version number
SMB3: Clean up query symlink when reparse point
cifs: fix strcat buffer overflow and reduce raciness in smb21_set_oplock_level()
Negotiate and save preferred compression algorithms
cifs: rename and clarify CIFS_ASYNC_OP and CIFS_NO_RESP
cifs: fix credits leak for SMB1 oplock breaks
smb3: Add protocol structs for change notify support
cifs: fix smb3_zero_range for Azure
cifs: zero-range does not require the file is sparse
Add new flag on SMB3.1.1 read
cifs: add fiemap support
SMB3: Add defines for new negotiate contexts
cifs: fix bi-directional fsctl passthrough calls
cifs: smbd: take an array of reqeusts when sending upper layer data
SMB3: Add handling for different FSCTL access flags
cifs: Add support for FSCTL passthrough that write data to the server
cifs: remove superfluous inode_lock in cifs_{strict_}fsync
cifs: Call MID callback before destroying transport
cifs: smbd: Retry on memory registration failure
cifs: smbd: Indicate to retry on transport sending failure
...
Pull networking updates from David Miller:
"Highlights:
1) Support AES128-CCM ciphers in kTLS, from Vakul Garg.
2) Add fib_sync_mem to control the amount of dirty memory we allow to
queue up between synchronize RCU calls, from David Ahern.
3) Make flow classifier more lockless, from Vlad Buslov.
4) Add PHY downshift support to aquantia driver, from Heiner
Kallweit.
5) Add SKB cache for TCP rx and tx, from Eric Dumazet. This reduces
contention on SLAB spinlocks in heavy RPC workloads.
6) Partial GSO offload support in XFRM, from Boris Pismenny.
7) Add fast link down support to ethtool, from Heiner Kallweit.
8) Use siphash for IP ID generator, from Eric Dumazet.
9) Pull nexthops even further out from ipv4/ipv6 routes and FIB
entries, from David Ahern.
10) Move skb->xmit_more into a per-cpu variable, from Florian
Westphal.
11) Improve eBPF verifier speed and increase maximum program size,
from Alexei Starovoitov.
12) Eliminate per-bucket spinlocks in rhashtable, and instead use bit
spinlocks. From Neil Brown.
13) Allow tunneling with GUE encap in ipvs, from Jacky Hu.
14) Improve link partner cap detection in generic PHY code, from
Heiner Kallweit.
15) Add layer 2 encap support to bpf_skb_adjust_room(), from Alan
Maguire.
16) Remove SKB list implementation assumptions in SCTP, your's truly.
17) Various cleanups, optimizations, and simplifications in r8169
driver. From Heiner Kallweit.
18) Add memory accounting on TX and RX path of SCTP, from Xin Long.
19) Switch PHY drivers over to use dynamic featue detection, from
Heiner Kallweit.
20) Support flow steering without masking in dpaa2-eth, from Ioana
Ciocoi.
21) Implement ndo_get_devlink_port in netdevsim driver, from Jiri
Pirko.
22) Increase the strict parsing of current and future netlink
attributes, also export such policies to userspace. From Johannes
Berg.
23) Allow DSA tag drivers to be modular, from Andrew Lunn.
24) Remove legacy DSA probing support, also from Andrew Lunn.
25) Allow ll_temac driver to be used on non-x86 platforms, from Esben
Haabendal.
26) Add a generic tracepoint for TX queue timeouts to ease debugging,
from Cong Wang.
27) More indirect call optimizations, from Paolo Abeni"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1763 commits)
cxgb4: Fix error path in cxgb4_init_module
net: phy: improve pause mode reporting in phy_print_status
dt-bindings: net: Fix a typo in the phy-mode list for ethernet bindings
net: macb: Change interrupt and napi enable order in open
net: ll_temac: Improve error message on error IRQ
net/sched: remove block pointer from common offload structure
net: ethernet: support of_get_mac_address new ERR_PTR error
net: usb: smsc: fix warning reported by kbuild test robot
staging: octeon-ethernet: Fix of_get_mac_address ERR_PTR check
net: dsa: support of_get_mac_address new ERR_PTR error
net: dsa: sja1105: Fix status initialization in sja1105_get_ethtool_stats
vrf: sit mtu should not be updated when vrf netdev is the link
net: dsa: Fix error cleanup path in dsa_init_module
l2tp: Fix possible NULL pointer dereference
taprio: add null check on sched_nest to avoid potential null pointer dereference
net: mvpp2: cls: fix less than zero check on a u32 variable
net_sched: sch_fq: handle non connected flows
net_sched: sch_fq: do not assume EDT packets are ordered
net: hns3: use devm_kcalloc when allocating desc_cb
net: hns3: some cleanup for struct hns3_enet_ring
...
miscellaneous cleanups.
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Merge tag 'fscrypt_for_linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt
Pull fscrypt updates from Ted Ts'o:
"Clean up fscrypt's dcache revalidation support, and other
miscellaneous cleanups"
* tag 'fscrypt_for_linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
fscrypt: cache decrypted symlink target in ->i_link
vfs: use READ_ONCE() to access ->i_link
fscrypt: fix race where ->lookup() marks plaintext dentry as ciphertext
fscrypt: only set dentry_operations on ciphertext dentries
fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when unaliasing directory
fscrypt: fix race allowing rename() and link() of ciphertext dentries
fscrypt: clean up and improve dentry revalidation
fscrypt: use READ_ONCE() to access ->i_crypt_info
fscrypt: remove WARN_ON_ONCE() when decryption fails
fscrypt: drop inode argument from fscrypt_get_ctx()
Two of the common symlink formats use reparse points
(unlike mfsymlinks and also unlike the SMB1 posix
extensions). This is the first part of the fixes
to allow these reparse points (NFS style and Windows
symlinks) to be resolved properly as symlinks by the
client.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Change strcat to strncpy in the "None" case to fix a buffer overflow
when cinode->oplock is reset to 0 by another thread accessing the same
cinode. It is never valid to append "None" to any other message.
Consolidate multiple writes to cinode->oplock to reduce raciness.
Signed-off-by: Christoph Probst <kernel@probst.it>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
New negotiate context (3) allows the server and client to
negotiate which compression algorithms to use. Add support
for this and save it off in the server structure.
Also now displayed in /proc/fs/cifs/DebugData (see below example
to Windows 10) where compression algoirthm "LZ77" was negotiated:
Servers:
Number of credits: 326 Dialect 0x311 COMPRESS_LZ77 signed
1) Name: 192.168.92.17 Uses: 1 Capability: 0x300067 Session Status: 1 TCP status: 1 Instance: 1
See MS-XCA and MS-SMB2 2.2.3.1 for more details.
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
The flags were named confusingly.
CIFS_ASYNC_OP now just means that we will not block waiting for credits
to become available so we thus rename this to be CIFS_NON_BLOCKING.
Change CIFS_NO_RESP to CIFS_NO_RSP_BUF to clarify that we will actually get a
response from the server but we will not get/do not want a response buffer.
Delete CIFSSMBNotify. This is an SMB1 function that is not used.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
For SMB1 oplock breaks we would grab one credit while sending the PDU
but we would never relese the credit back since we will never receive a
response to this from the server. Eventuallt this would lead to a hang
once all credits are leaked.
Fix this by defining a new flag CIFS_NO_SRV_RSP which indicates that there
is no server response to this command and thus we need to add any credits back
immediately after sending the PDU.
CC: Stable <stable@vger.kernel.org> #v5.0+
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Add the SMB3 protocol flag definitions and structs for
change notify. Future patches will add the hooks to
allow it to be invoked from the client.
See MS-FSCC 2.6 and MS-SMB2 2.2.35
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
For zero-range that also extend the file we were sending this as a
compound of two different operations; a fsctl to set-zero-data for the range
and then an additional set-info to extend the file size.
This does not work for Azure since it does not support this fsctl which leads
to fallocate(FALLOC_FL_ZERO_RANGE) failing but still changing the file size.
To fix this we un-compound this and send these two operations as separate
commands, firsat one command to set-zero-data for the range and it this
was successful we proceed to send a set-info to update the file size.
This fixes xfstest generic/469 for Azure servers.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Remove the conditional to fail zero-range if the file is not flagged as sparse.
You can still zero out a range in SMB2 even for non-sparse files.
Tested with stock windows16 server.
Fixes 5 xfstests (033, 149, 155, 180, 349)
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Useful for improved copy performance as well as for
applications which query allocated ranges of sparse
files.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
See the latest MS-SMB2 protocol specification updates.
These will be needed for implementing compression support
on the wire for example.
Signed-off-by: Steve French <stfrench@microsoft.com>
SMB2 Ioctl responses from servers may respond with both the request blob from
the client followed by the actual reply blob for ioctls that are bi-directional.
In that case we can not assume that the reply blob comes immediately after the
ioctl response structure.
This fixes FSCTLs such as SMB2:FSCTL_QUERY_ALLOCATED_RANGES
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
To support compounding, __smb_send_rqst() now sends an array of requests to
the transport layer.
Change smbd_send() to take an array of requests, and send them in as few
packets as possible.
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
DesiredAccess field in SMB3 open request needs
to be set differently for READ vs. WRITE ioctls
(not just ones that request both).
Originally noticed by Pavel
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Add support to pass a blob to the server in FSCTL passthrough.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Originally, filemap_write_and_wait took the i_mutex internally, but
commit 02c24a8218 pushed the mutex acquisition into the individual
fsync routines, leaving it up to the subsystem maintainers to remove
it if it wasn't needed.
For cifs, I see no reason to take the inode_lock here. All of the
operations inside that lock are protected in other ways.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
When transport is being destroyed, it's possible that some processes may
hold memory registrations that need to be deregistred.
Call them first so nobody is using transport resources, and it can be
destroyed.
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Memory registration failure doesn't mean this I/O has failed, it means the
transport is hitting I/O error or needs reconnect. This error is not from
the server.
Indicate this error to upper layer, and let upper layer decide how to
reconnect and proceed with this I/O.
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Failure to send a packet doesn't mean it's a permanent failure, it can't be
returned to user process. This I/O should be retried or failed based on
server packet response and transport health. This logic is handled by the
upper layer.
Give this decision to upper layer.
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
When packets are waiting for outbound I/O and interrupted, return the
proper error code to user process.
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Now upper layer is handling the transport shutdown and reconnect, remove
the code that handling transport shutdown on RDMA disconnect.
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
On transport recoonect, upper layer CIFS code destroys the current
transport and then recoonect. This code path is not used by SMBD, in that
SMBD destroys its transport on RDMA disconnect notification independent of
CIFS upper layer behavior.
This approach adds some costs to SMBD layer to handle transport shutdown
and restart, and to deal with several racing conditions on reconnecting
transport.
Re-work this code path by introducing a new smbd_destroy. This function is
called form upper layer to ask SMBD to destroy the transport. SMBD will no
longer need to destroy the transport by itself while worrying about data
transfer is in progress. The upper layer guarantees the transport is
locked.
change log:
v2: fix build errors when CONFIG_CIFS_SMB_DIRECT is not configured
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
if we mount A then mount A again with nodfs, we shouldn't reuse the
superblock. document the purpose of the defines as well.
there are most likely more flags that needs to be added to this mask,
in fact the logic to find them should be which flag should
be *ignored* when trying to reuse an existing sb.
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Missing parameter that should be displayed in the mount list
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Kenneth D'souza <kdsouza@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
As per MS-DFSC, when a DFS cache entry is expired and it is a DFS
link, then a new DFS referral must be sent to root server in order to
refresh the expired entry.
This patch ensures that all new DFS referrals for refreshing the cache
are sent to DFS root.
Signed-off-by: Paulo Alcantara (SUSE) <paulo@paulo.ac>
Signed-off-by: Steve French <stfrench@microsoft.com>
A trivial patch.
cpu_to_le32() is capable enough to detect __builtin_constant_p()
and to use an appropriate compile time ___constant_swahb32()
function.
So we can use cpu_to_le32() instead of __constant_cpu_to_le32().
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
using Unicode 12.1. Also, the usual largish number of cleanups and bug
fixes.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 updates from Ted Ts'o:
"Add as a feature case-insensitive directories (the casefold feature)
using Unicode 12.1.
Also, the usual largish number of cleanups and bug fixes"
* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (25 commits)
ext4: export /sys/fs/ext4/feature/casefold if Unicode support is present
ext4: fix ext4_show_options for file systems w/o journal
unicode: refactor the rule for regenerating utf8data.h
docs: ext4.rst: document case-insensitive directories
ext4: Support case-insensitive file name lookups
ext4: include charset encoding information in the superblock
MAINTAINERS: add Unicode subsystem entry
unicode: update unicode database unicode version 12.1.0
unicode: introduce test module for normalized utf8 implementation
unicode: implement higher level API for string handling
unicode: reduce the size of utf8data[]
unicode: introduce code for UTF-8 normalization
unicode: introduce UTF-8 character database
ext4: actually request zeroing of inode table after grow
ext4: cond_resched in work-heavy group loops
ext4: fix use-after-free race with debug_want_extra_isize
ext4: avoid drop reference to iloc.bh twice
ext4: ignore e_value_offs for xattrs with value-in-ea-inode
ext4: protect journal inode's blocks using block_validity
ext4: use BUG() instead of BUG_ON(1)
...
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Merge tag 'afs-next-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull AFS updates from David Howells:
"A set of fix and development patches for AFS for 5.2.
Summary:
- Fix the AFS file locking so that sqlite can run on an AFS mount and
also so that firefox and gnome can use a homedir that's mounted
through AFS.
This required emulation of fine-grained locking when the server
will only support whole-file locks and no upgrade/downgrade. Four
modes are provided, settable by mount parameter:
"flock=local" - No reference to the server
"flock=openafs" - Fine-grained locks are local-only, whole-file
locks require sufficient server locks
"flock=strict" - All locks require sufficient server locks
"flock=write" - Always get an exclusive server lock
If the volume is a read-only or backup volume, then flock=local for
that volume.
- Log extra information for a couple of cases where the client mucks
up somehow: AFS vnode with undefined type and dir check failure -
in both cases we seem to end up with unfilled data, but the issues
happen infrequently and are difficult to reproduce at will.
- Implement silly rename for unlink() and rename().
- Set i_blocks so that du can get some information about usage.
- Fix xattr handlers to return the right amount of data and to not
overflow buffers.
- Implement getting/setting raw AFS and YFS ACLs as xattrs"
* tag 'afs-next-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Implement YFS ACL setting
afs: Get YFS ACLs and information through xattrs
afs: implement acl setting
afs: Get an AFS3 ACL as an xattr
afs: Fix getting the afs.fid xattr
afs: Fix the afs.cell and afs.volume xattr handlers
afs: Calculate i_blocks based on file size
afs: Log more information for "kAFS: AFS vnode with undefined type\n"
afs: Provide mount-time configurable byte-range file locking emulation
afs: Add more tracepoints
afs: Implement sillyrename for unlink and rename
afs: Add directory reload tracepoint
afs: Handle lock rpc ops failing on a file that got deleted
afs: Improve dir check failure reports
afs: Add file locking tracepoints
afs: Further fix file locking
afs: Fix AFS file locking to allow fine grained locks
afs: Calculate lock extend timer from set/extend reply reception
afs: Split wait from afs_make_call()
