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2020-04-16mISDN: make dmril and dmrim staticJason Yan
Fix the following sparse warning: drivers/isdn/hardware/mISDN/mISDNisar.c:746:12: warning: symbol 'dmril' was not declared. Should it be static? drivers/isdn/hardware/mISDN/mISDNisar.c:749:12: warning: symbol 'dmrim' was not declared. Should it be static? Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Jason Yan <yanaijie@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-16net: stmmac: dwmac-sunxi: Provide TX and RX fifo sizesFlorian Fainelli
After commit bfcb813203e619a8960a819bf533ad2a108d8105 ("net: dsa: configure the MTU for switch ports") my Lamobo R1 platform which uses an allwinner,sun7i-a20-gmac compatible Ethernet MAC started to fail by rejecting a MTU of 1536. The reason for that is that the DMA capabilities are not readable on this version of the IP, and there is also no 'tx-fifo-depth' property being provided in Device Tree. The property is documented as optional, and is not provided. Chen-Yu indicated that the FIFO sizes are 4KB for TX and 16KB for RX, so provide these values through platform data as an immediate fix until various Device Tree sources get updated accordingly. Fixes: eaf4fac47807 ("net: stmmac: Do not accept invalid MTU values") Suggested-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-16net: dsa: mt7530: fix tagged frames pass-through in VLAN-unaware modeDENG Qingfang
In VLAN-unaware mode, the Egress Tag (EG_TAG) field in Port VLAN Control register must be set to Consistent to let tagged frames pass through as is, otherwise their tags will be stripped. Fixes: 83163f7dca56 ("net: dsa: mediatek: add VLAN support for MT7530") Signed-off-by: DENG Qingfang <dqfext@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Tested-by: René van Dorst <opensource@vdorst.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-16dt-bindings: Fix misspellings of "Analog Devices"Geert Uytterhoeven
According to https://www.analog.com/, the company name is spelled "Analog Devices". Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rob Herring <robh@kernel.org>
2020-04-16Merge tag 'selinux-pr-20200416' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux Pull SELinux fix from Paul Moore: "One small SELinux fix to ensure we cleanup properly on an error condition" * tag 'selinux-pr-20200416' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux: selinux: free str on error in str_read()
2020-04-16Merge tag 'ceph-for-5.7-rc2' of git://github.com/ceph/ceph-clientLinus Torvalds
Pull ceph fixes from Ilya Dryomov: - a set of patches for a deadlock on "rbd map" error path - a fix for invalid pointer dereference and uninitialized variable use on asynchronous create and unlink error paths. * tag 'ceph-for-5.7-rc2' of git://github.com/ceph/ceph-client: ceph: fix potential bad pointer deref in async dirops cb's rbd: don't mess with a page vector in rbd_notify_op_lock() rbd: don't test rbd_dev->opts in rbd_dev_image_release() rbd: call rbd_dev_unprobe() after unwatching and flushing notifies rbd: avoid a deadlock on header_rwsem when flushing notifies
2020-04-16smb3: remove overly noisy debug line in signing errorsSteve French
A dump_stack call for signature related errors can be too noisy and not of much value in debugging such problems. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Shyam Prasad N <nspmangalore@gmail.com>
2020-04-16Merge tag 'trace-v5.7-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing fix from Steven Rostedt: "This fixes a small race between allocating a snapshot buffer and setting the snapshot trigger. On a slow machine, the trigger can occur before the snapshot is allocated causing a warning to be displayed in the ring buffer, and no snapshot triggering. Reversing the allocation and the enabling of the trigger fixes the problem" * tag 'trace-v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing: Fix the race between registering 'snapshot' event trigger and triggering 'snapshot' operation
2020-04-16keys: Fix proc_keys_next to increase position indexVasily Averin
If seq_file .next function does not change position index, read after some lseek can generate unexpected output: $ dd if=/proc/keys bs=1 # full usual output 0f6bfdf5 I--Q--- 2 perm 3f010000 1000 1000 user 4af2f79ab8848d0a: 740 1fb91b32 I--Q--- 3 perm 1f3f0000 1000 65534 keyring _uid.1000: 2 27589480 I--Q--- 1 perm 0b0b0000 0 0 user invocation_id: 16 2f33ab67 I--Q--- 152 perm 3f030000 0 0 keyring _ses: 2 33f1d8fa I--Q--- 4 perm 3f030000 1000 1000 keyring _ses: 1 3d427fda I--Q--- 2 perm 3f010000 1000 1000 user 69ec44aec7678e5a: 740 3ead4096 I--Q--- 1 perm 1f3f0000 1000 65534 keyring _uid_ses.1000: 1 521+0 records in 521+0 records out 521 bytes copied, 0,00123769 s, 421 kB/s But a read after lseek in middle of last line results in the partial last line and then a repeat of the final line: $ dd if=/proc/keys bs=500 skip=1 dd: /proc/keys: cannot skip to specified offset g _uid_ses.1000: 1 3ead4096 I--Q--- 1 perm 1f3f0000 1000 65534 keyring _uid_ses.1000: 1 0+1 records in 0+1 records out 97 bytes copied, 0,000135035 s, 718 kB/s and a read after lseek beyond end of file results in the last line being shown: $ dd if=/proc/keys bs=1000 skip=1 # read after lseek beyond end of file dd: /proc/keys: cannot skip to specified offset 3ead4096 I--Q--- 1 perm 1f3f0000 1000 65534 keyring _uid_ses.1000: 1 0+1 records in 0+1 records out 76 bytes copied, 0,000119981 s, 633 kB/s See https://bugzilla.kernel.org/show_bug.cgi?id=206283 Fixes: 1f4aace60b0e ("fs/seq_file.c: simplify seq_file iteration code ...") Signed-off-by: Vasily Averin <vvs@virtuozzo.com> Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-16ahci: Add Intel Comet Lake PCH-U PCI IDKai-Heng Feng
Add Intel Comet Lake PCH-U PCI ID to the list of supported controllers. Set default SATA LPM so the SoC can enter S0ix. Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-04-16xfs: move inode flush to the sync workqueueDarrick J. Wong
Move the inode dirty data flushing to a workqueue so that multiple threads can take advantage of a single thread's flushing work. The ratelimiting technique used in bdd4ee4 was not successful, because threads that skipped the inode flush scan due to ratelimiting would ENOSPC early, which caused occasional (but noticeable) changes in behavior and sporadic fstest regressions. Therefore, make all the writer threads wait on a single inode flush, which eliminates both the stampeding hordes of flushers and the small window in which a write could fail with ENOSPC because it lost the ratelimit race after even another thread freed space. Fixes: c6425702f21e ("xfs: ratelimit inode flush on buffered write ENOSPC") Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2020-04-16blk-mq: Put driver tag in blk_mq_dispatch_rq_list() when no budgetJohn Garry
If in blk_mq_dispatch_rq_list() we find no budget, then we break of the dispatch loop, but the request may keep the driver tag, evaulated in 'nxt' in the previous loop iteration. Fix by putting the driver tag for that request. Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-04-16proc, time/namespace: Show clock symbolic names in /proc/pid/timens_offsetsAndrei Vagin
Michael Kerrisk suggested to replace numeric clock IDs with symbolic names. Now the content of these files looks like this: $ cat /proc/774/timens_offsets monotonic 864000 0 boottime 1728000 0 For setting offsets, both representations of clocks (numeric and symbolic) can be used. As for compatibility, it is acceptable to change things as long as userspace doesn't care. The format of timens_offsets files is very new and there are no userspace tools yet which rely on this format. But three projects crun, util-linux and criu rely on the interface of setting time offsets and this is why it's required to continue supporting the numeric clock IDs on write. Fixes: 04a8682a71be ("fs/proc: Introduce /proc/pid/timens_offsets") Suggested-by: Michael Kerrisk <mtk.manpages@gmail.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Dmitry Safonov <0x7f454c46@gmail.com> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20200411154031.642557-1-avagin@gmail.com
2020-04-16irqchip/gic-v4.1: Update effective affinity of virtual SGIsMarc Zyngier
Although the vSGIs are not directly visible to the host, they still get moved around by the CPU hotplug, for example. This results in the kernel moaning on the console, such as: genirq: irq_chip GICv4.1-sgi did not update eff. affinity mask of irq 38 Updating the effective affinity on set_affinity() fixes it. Reviewed-by: Zenghui Yu <yuzenghui@huawei.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
2020-04-16irqchip/gic-v4.1: Add support for VPENDBASER's Dirty+Valid signalingMarc Zyngier
When a vPE is made resident, the GIC starts parsing the virtual pending table to deliver pending interrupts. This takes place asynchronously, and can at times take a long while. Long enough that the vcpu enters the guest and hits WFI before any interrupt has been signaled yet. The vcpu then exits, blocks, and now gets a doorbell. Rince, repeat. In order to avoid the above, a (optional on GICv4, mandatory on v4.1) feature allows the GIC to feedback to the hypervisor whether it is done parsing the VPT by clearing the GICR_VPENDBASER.Dirty bit. The hypervisor can then wait until the GIC is ready before actually running the vPE. Plug the detection code as well as polling on vPE schedule. While at it, tidy-up the kernel message that displays the GICv4 optional features. Reviewed-by: Zenghui Yu <yuzenghui@huawei.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
2020-04-16Merge tag 'perf-urgent-for-mingo-5.7-20200414' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent fixes from Arnaldo Carvalho de Melo: perf stat: Jin Yao: - Fix no metric header if --per-socket and --metric-only set build system: - Fix python building when built with clang, that was failing if the clang version doesn't support -fno-semantic-interposition. tools UAPI headers: Arnaldo Carvalho de Melo: - Update various copies of kernel headers, some ended up automatically updating build-time generated tables to enable tools such as 'perf trace' to decode syscalls and tracepoints arguments. Now the tools/perf build is free of UAPI drift warnings. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-04-16Merge branch 'linux-5.7' of git://github.com/skeggsb/linux into drm-fixesDave Airlie
Add missing module firmware for turings. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Ben Skeggs <skeggsb@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/ <CACAvsv4njTRpiNqOC54iRjpd=nu3pBG8i_fp8o_dp7AZE6hFWA@mail.gmail.com
2020-04-16drm/nouveau/sec2/gv100-: add missing MODULE_FIRMWARE()Ben Skeggs
ASB was failing to load on Turing GPUs when firmware is being loaded from initramfs, leaving the GPU in an odd state and causing suspend/ resume to fail. Add missing MODULE_FIRMWARE() lines for initramfs generators. Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Cc: <stable@vger.kernel.org> # 5.6
2020-04-15proc: Handle umounts cleanlyEric W. Biederman
syzbot writes: > KASAN: use-after-free Read in dput (2) > > proc_fill_super: allocate dentry failed > ================================================================== > BUG: KASAN: use-after-free in fast_dput fs/dcache.c:727 [inline] > BUG: KASAN: use-after-free in dput+0x53e/0xdf0 fs/dcache.c:846 > Read of size 4 at addr ffff88808a618cf0 by task syz-executor.0/8426 > > CPU: 0 PID: 8426 Comm: syz-executor.0 Not tainted 5.6.0-next-20200412-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x188/0x20d lib/dump_stack.c:118 > print_address_description.constprop.0.cold+0xd3/0x315 mm/kasan/report.c:382 > __kasan_report.cold+0x35/0x4d mm/kasan/report.c:511 > kasan_report+0x33/0x50 mm/kasan/common.c:625 > fast_dput fs/dcache.c:727 [inline] > dput+0x53e/0xdf0 fs/dcache.c:846 > proc_kill_sb+0x73/0xf0 fs/proc/root.c:195 > deactivate_locked_super+0x8c/0xf0 fs/super.c:335 > vfs_get_super+0x258/0x2d0 fs/super.c:1212 > vfs_get_tree+0x89/0x2f0 fs/super.c:1547 > do_new_mount fs/namespace.c:2813 [inline] > do_mount+0x1306/0x1b30 fs/namespace.c:3138 > __do_sys_mount fs/namespace.c:3347 [inline] > __se_sys_mount fs/namespace.c:3324 [inline] > __x64_sys_mount+0x18f/0x230 fs/namespace.c:3324 > do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 > entry_SYSCALL_64_after_hwframe+0x49/0xb3 > RIP: 0033:0x45c889 > Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007ffc1930ec48 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 > RAX: ffffffffffffffda RBX: 0000000001324914 RCX: 000000000045c889 > RDX: 0000000020000140 RSI: 0000000020000040 RDI: 0000000000000000 > RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 > R13: 0000000000000749 R14: 00000000004ca15a R15: 0000000000000013 Looking at the code now that it the internal mount of proc is no longer used it is possible to unmount proc. If proc is unmounted the fields of the pid namespace that were used for filesystem specific state are not reinitialized. Which means that proc_self and proc_thread_self can be pointers to already freed dentries. The reported user after free appears to be from mounting and unmounting proc followed by mounting proc again and using error injection to cause the new root dentry allocation to fail. This in turn results in proc_kill_sb running with proc_self and proc_thread_self still retaining their values from the previous mount of proc. Then calling dput on either proc_self of proc_thread_self will result in double put. Which KASAN sees as a use after free. Solve this by always reinitializing the filesystem state stored in the struct pid_namespace, when proc is unmounted. Reported-by: syzbot+72868dd424eb66c6b95f@syzkaller.appspotmail.com Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Fixes: 69879c01a0c3 ("proc: Remove the now unnecessary internal mount of proc") Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2020-04-15ext4: convert BUG_ON's to WARN_ON's in mballoc.cTheodore Ts'o
If the in-core buddy bitmap gets corrupted (or out of sync with the block bitmap), issue a WARN_ON and try to recover. In most cases this involves skipping trying to allocate out of a particular block group. We can end up declaring the file system corrupted, which is fair, since the file system probably should be checked before we proceed any further. Link: https://lore.kernel.org/r/20200414035649.293164-1-tytso@mit.edu Google-Bug-Id: 34811296 Google-Bug-Id: 34639169 Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-04-15ext4: increase wait time needed before reuse of deleted inode numbersTheodore Ts'o
Current wait times have proven to be too short to protect against inode reuses that lead to metadata inconsistencies. Now that we will retry the inode allocation if we can't find any recently deleted inodes, it's a lot safer to increase the recently deleted time from 5 seconds to a minute. Link: https://lore.kernel.org/r/20200414023925.273867-1-tytso@mit.edu Google-Bug-Id: 36602237 Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-04-15ext4: remove set but not used variable 'es' in ext4_jbd2.cJason Yan
Fix the following gcc warning: fs/ext4/ext4_jbd2.c:341:30: warning: variable 'es' set but not used [-Wunused-but-set-variable] struct ext4_super_block *es; ^~ Fixes: 2ea2fc775321 ("ext4: save all error info in save_error_info() and drop ext4_set_errno()") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Jason Yan <yanaijie@huawei.com> Link: https://lore.kernel.org/r/20200402034759.29957-1-yanaijie@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-04-15ext4: remove set but not used variable 'es'Jason Yan
Fix the following gcc warning: fs/ext4/super.c:599:27: warning: variable 'es' set but not used [-Wunused-but-set-variable] struct ext4_super_block *es; ^~ Fixes: 2ea2fc775321 ("ext4: save all error info in save_error_info() and drop ext4_set_errno()") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Jason Yan <yanaijie@huawei.com> Link: https://lore.kernel.org/r/20200402033939.25303-1-yanaijie@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-04-15ext4: do not zeroout extents beyond i_disksizeJan Kara
We do not want to create initialized extents beyond end of file because for e2fsck it is impossible to distinguish them from a case of corrupted file size / extent tree and so it complains like: Inode 12, i_size is 147456, should be 163840. Fix? no Code in ext4_ext_convert_to_initialized() and ext4_split_convert_extents() try to make sure it does not create initialized extents beyond inode size however they check against inode->i_size which is wrong. They should instead check against EXT4_I(inode)->i_disksize which is the current inode size on disk. That's what e2fsck is going to see in case of crash before all dirty data is written. This bug manifests as generic/456 test failure (with recent enough fstests where fsx got fixed to properly pass FALLOC_KEEP_SIZE_FL flags to the kernel) when run with dioread_lock mount option. CC: stable@vger.kernel.org Fixes: 21ca087a3891 ("ext4: Do not zero out uninitialized extents beyond i_size") Reviewed-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Link: https://lore.kernel.org/r/20200331105016.8674-1-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-04-15ext4: fix return-value types in several function commentsJosh Triplett
The documentation comments for ext4_read_block_bitmap_nowait and ext4_read_inode_bitmap describe them as returning NULL on error, but they return an ERR_PTR on error; update the documentation to match. The documentation comment for ext4_wait_block_bitmap describes it as returning 1 on error, but it returns -errno on error; update the documentation to match. Signed-off-by: Josh Triplett <josh@joshtriplett.org> Reviewed-by: Ritesh Harani <riteshh@linux.ibm.com> Link: https://lore.kernel.org/r/60a3f4996f4932c45515aaa6b75ca42f2a78ec9b.1585512514.git.josh@joshtriplett.org Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-04-15ext4: use non-movable memory for superblock readaheadRoman Gushchin
Since commit a8ac900b8163 ("ext4: use non-movable memory for the superblock") buffers for ext4 superblock were allocated using the sb_bread_unmovable() helper which allocated buffer heads out of non-movable memory blocks. It was necessarily to not block page migrations and do not cause cma allocation failures. However commit 85c8f176a611 ("ext4: preload block group descriptors") broke this by introducing pre-reading of the ext4 superblock. The problem is that __breadahead() is using __getblk() underneath, which allocates buffer heads out of movable memory. It resulted in page migration failures I've seen on a machine with an ext4 partition and a preallocated cma area. Fix this by introducing sb_breadahead_unmovable() and __breadahead_gfp() helpers which use non-movable memory for buffer head allocations and use them for the ext4 superblock readahead. Reviewed-by: Andreas Dilger <adilger@dilger.ca> Fixes: 85c8f176a611 ("ext4: preload block group descriptors") Signed-off-by: Roman Gushchin <guro@fb.com> Link: https://lore.kernel.org/r/20200229001411.128010-1-guro@fb.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-04-15ext4: use matching invalidatepage in ext4_writepageyangerkun
Run generic/388 with journal data mode sometimes may trigger the warning in ext4_invalidatepage. Actually, we should use the matching invalidatepage in ext4_writepage. Signed-off-by: yangerkun <yangerkun@huawei.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20200226041002.13914-1-yangerkun@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-04-15cifs: improve read performance for page size 64KB & cache=strict & vers=2.1+Jones Syue
Found a read performance issue when linux kernel page size is 64KB. If linux kernel page size is 64KB and mount options cache=strict & vers=2.1+, it does not support cifs_readpages(). Instead, it is using cifs_readpage() and cifs_read() with maximum read IO size 16KB, which is much slower than read IO size 1MB when negotiated SMB 2.1+. Since modern SMB server supported SMB 2.1+ and Max Read Size can reach more than 64KB (for example 1MB ~ 8MB), this patch check max_read instead of maxBuf to determine whether server support readpages() and improve read performance for page size 64KB & cache=strict & vers=2.1+, and for SMB1 it is more cleaner to initialize server->max_read to server->maxBuf. The client is a linux box with linux kernel 4.2.8, page size 64KB (CONFIG_ARM64_64K_PAGES=y), cpu arm 1.7GHz, and use mount.cifs as smb client. The server is another linux box with linux kernel 4.2.8, share a file '10G.img' with size 10GB, and use samba-4.7.12 as smb server. The client mount a share from the server with different cache options: cache=strict and cache=none, mount -tcifs //<server_ip>/Public /cache_strict -overs=3.0,cache=strict,username=<xxx>,password=<yyy> mount -tcifs //<server_ip>/Public /cache_none -overs=3.0,cache=none,username=<xxx>,password=<yyy> The client download a 10GbE file from the server across 1GbE network, dd if=/cache_strict/10G.img of=/dev/null bs=1M count=10240 dd if=/cache_none/10G.img of=/dev/null bs=1M count=10240 Found that cache=strict (without patch) is slower read throughput and smaller read IO size than cache=none. cache=strict (without patch): read throughput 40MB/s, read IO size is 16KB cache=strict (with patch): read throughput 113MB/s, read IO size is 1MB cache=none: read throughput 109MB/s, read IO size is 1MB Looks like if page size is 64KB, cifs_set_ops() would use cifs_addr_ops_smallbuf instead of cifs_addr_ops, /* check if server can support readpages */ if (cifs_sb_master_tcon(cifs_sb)->ses->server->maxBuf < PAGE_SIZE + MAX_CIFS_HDR_SIZE) inode->i_data.a_ops = &cifs_addr_ops_smallbuf; else inode->i_data.a_ops = &cifs_addr_ops; maxBuf is came from 2 places, SMB2_negotiate() and CIFSSMBNegotiate(), (SMB2_MAX_BUFFER_SIZE is 64KB) SMB2_negotiate(): /* set it to the maximum buffer size value we can send with 1 credit */ server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),       SMB2_MAX_BUFFER_SIZE); CIFSSMBNegotiate(): server->maxBuf = le32_to_cpu(pSMBr->MaxBufferSize); Page size 64KB and cache=strict lead to read_pages() use cifs_readpage() instead of cifs_readpages(), and then cifs_read() using maximum read IO size 16KB, which is much slower than maximum read IO size 1MB. (CIFSMaxBufSize is 16KB by default) /* FIXME: set up handlers for larger reads and/or convert to async */ rsize = min_t(unsigned int, cifs_sb->rsize, CIFSMaxBufSize); Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com> Signed-off-by: Jones Syue <jonessyue@qnap.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-04-15cifs: dump the session id and keys also for SMB2 sessionsRonnie Sahlberg
We already dump these keys for SMB3, lets also dump it for SMB2 sessions so that we can use the session key in wireshark to check and validate that the signatures are correct. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com>
2020-04-16Merge tag 'amd-drm-fixes-5.7-2020-04-15' of ↵Dave Airlie
git://people.freedesktop.org/~agd5f/linux into drm-fixes amd-drm-fixes-5.7-2020-04-15: amdgpu: - gfx10 fix - SMU7 overclocking fix - RAS fix - GPU reset fix - Fix a regression in a previous s/r fix - Add a gfxoff quirk Signed-off-by: Dave Airlie <airlied@redhat.com> From: Alex Deucher <alexdeucher@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200415221631.3924-1-alexander.deucher@amd.com
2020-04-16Merge tag 'drm-intel-fixes-2020-04-15' of ↵Dave Airlie
git://anongit.freedesktop.org/drm/drm-intel into drm-fixes - Fix guest page access by using the brand new VFIO dma r/w interface (Yan) - Fix for i915 perf read buffers (Ashutosh) Signed-off-by: Dave Airlie <airlied@redhat.com> From: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200415200349.GA2550694@intel.com
2020-04-15Merge tag 'efi-urgent-2020-04-15' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull EFI fixes from Ingo Molnar: "Misc EFI fixes, including the boot failure regression caused by the BSS section not being cleared by the loaders" * tag 'efi-urgent-2020-04-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi/x86: Revert struct layout change to fix kexec boot regression efi/x86: Don't remap text<->rodata gap read-only for mixed mode efi/x86: Fix the deletion of variables in mixed mode efi/libstub/file: Merge file name buffers to reduce stack usage Documentation/x86, efi/x86: Clarify EFI handover protocol and its requirements efi/arm: Deal with ADR going out of range in efi_enter_kernel() efi/x86: Always relocate the kernel for EFI handover entry efi/x86: Move efi stub globals from .bss to .data efi/libstub/x86: Remove redundant assignment to pointer hdr efi/cper: Use scnprintf() for avoiding potential buffer overflow
2020-04-15tipc: fix incorrect increasing of link windowTuong Lien
In commit 16ad3f4022bb ("tipc: introduce variable window congestion control"), we allow link window to change with the congestion avoidance algorithm. However, there is a bug that during the slow-start if packet retransmission occurs, the link will enter the fast-recovery phase, set its window to the 'ssthresh' which is never less than 300, so the link window suddenly increases to that limit instead of decreasing. Consequently, two issues have been observed: - For broadcast-link: it can leave a gap between the link queues that a new packet will be inserted and sent before the previous ones, i.e. not in-order. - For unicast: the algorithm does not work as expected, the link window jumps to the slow-start threshold whereas packet retransmission occurs. This commit fixes the issues by avoiding such the link window increase, but still decreasing if the 'ssthresh' is lowered. Fixes: 16ad3f4022bb ("tipc: introduce variable window congestion control") Acked-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-15Documentation: Fix tcp_challenge_ack_limit default valueCambda Zhu
The default value of tcp_challenge_ack_limit has been changed from 100 to 1000 and this patch fixes its documentation. Signed-off-by: Cambda Zhu <cambda@linux.alibaba.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-15net: tulip: make early_486_chipsets staticJason Yan
Fix the following sparse warning: drivers/net/ethernet/dec/tulip/tulip_core.c:1280:28: warning: symbol 'early_486_chipsets' was not declared. Should it be static? Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Jason Yan <yanaijie@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-15dt-bindings: net: ethernet-phy: add desciption for ethernet-phy-id1234.d400Johan Jonker
The description below is already in use in 'rk3228-evb.dts', 'rk3229-xms6.dts' and 'rk3328.dtsi' but somehow never added to a document, so add "ethernet-phy-id1234.d400", "ethernet-phy-ieee802.3-c22" for ethernet-phy nodes on Rockchip platforms to 'ethernet-phy.yaml'. Signed-off-by: Johan Jonker <jbx6244@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-15ipv6: remove redundant assignment to variable errColin Ian King
The variable err is being initialized with a value that is never read and it is being updated later with a new value. The initialization is redundant and can be removed. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-15dt-bindings: pwm: Fix cros-ec-pwm example dtc 'reg' warningRob Herring
The example for the CrOS EC PWM is incomplete and now generates a dtc warning: Documentation/devicetree/bindings/pwm/google,cros-ec-pwm.example.dts:17.11-23.11: Warning (unit_address_vs_reg): /example-0/cros-ec@0: node has a unit name, but no reg or ranges property Fixing this results in more warnings as a parent spi node is needed as well. Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Benson Leung <bleung@chromium.org> Cc: Enric Balletbo i Serra <enric.balletbo@collabora.com> Cc: Guenter Roeck <groeck@chromium.org> Cc: linux-pwm@vger.kernel.org Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Rob Herring <robh@kernel.org>
2020-04-15selinux: free str on error in str_read()Ondrej Mosnacek
In [see "Fixes:"] I missed the fact that str_read() may give back an allocated pointer even if it returns an error, causing a potential memory leak in filename_trans_read_one(). Fix this by making the function free the allocated string whenever it returns a non-zero value, which also makes its behavior more obvious and prevents repeating the same mistake in the future. Reported-by: coverity-bot <keescook+coverity-bot@chromium.org> Addresses-Coverity-ID: 1461665 ("Resource leaks") Fixes: c3a276111ea2 ("selinux: optimize storage of filename transitions") Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Paul Moore <paul@paul-moore.com>
2020-04-15scripts: documentation-file-ref-check: Add line break before exitTiezhu Yang
If execute ./scripts/documentation-file-ref-check in a directory which is not a git tree, it will exit without a line break, fix it. Without this patch: [loongson@localhost linux-5.7-rc1]$ ./scripts/documentation-file-ref-check Warning: can't check if file exists, as this is not a git tree[loongson@localhost linux-5.7-rc1]$ With this patch: [loongson@localhost linux-5.7-rc1]$ ./scripts/documentation-file-ref-check Warning: can't check if file exists, as this is not a git tree [loongson@localhost linux-5.7-rc1]$ Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/1586857308-2040-1-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-15scripts/kernel-doc: Add missing close-paren in c:function directivesPeter Maydell
When kernel-doc generates a 'c:function' directive for a function one of whose arguments is a function pointer, it fails to print the close-paren after the argument list of the function pointer argument. For instance: long work_on_cpu(int cpu, long (*fn) (void *, void * arg) in driver-api/basics.html is missing a ')' separating the "void *" of the 'fn' arguments from the ", void * arg" which is an argument to work_on_cpu(). Add the missing close-paren, so that we render the prototype correctly: long work_on_cpu(int cpu, long (*fn)(void *), void * arg) (Note that Sphinx stops rendering a space between the '(fn*)' and the '(void *)' once it gets something that's syntactically valid.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Link: https://lore.kernel.org/r/20200414143743.32677-1-peter.maydell@linaro.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-15docs: admin-guide: merge sections for the kernel.modprobe sysctlEric Biggers
Documentation for the kernel.modprobe sysctl was added both by commit 0317c5371e6a ("docs: merge debugging-modules.txt into sysctl/kernel.rst") and by commit 6e7158250625 ("docs: admin-guide: document the kernel.modprobe sysctl"), resulting in the same sysctl being documented in two places. Merge these into one place. Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Stephen Kitt <steve@sk2.org> Link: https://lore.kernel.org/r/20200414172430.230293-1-ebiggers@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-15docs: timekeeping: Use correct prototype for deprecated functionsChris Packham
Use the correct prototypes for do_gettimeofday(), getnstimeofday() and getnstimeofday64(). All of these returned void and passed the return value by reference. This should make the documentation of their deprecation and replacements easier to search for. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Acked-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20200414221222.23996-1-chris.packham@alliedtelesis.co.nz Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-15net/rds: Use ERR_PTR for rds_message_alloc_sgs()Jason Gunthorpe
Returning the error code via a 'int *ret' when the function returns a pointer is very un-kernely and causes gcc 10's static analysis to choke: net/rds/message.c: In function ‘rds_message_map_pages’: net/rds/message.c:358:10: warning: ‘ret’ may be used uninitialized in this function [-Wmaybe-uninitialized] 358 | return ERR_PTR(ret); Use a typical ERR_PTR return instead. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-15net: mscc: ocelot: fix untagged packet drops when enslaving to vlan aware bridgeVladimir Oltean
To rehash a previous explanation given in commit 1c44ce560b4d ("net: mscc: ocelot: fix vlan_filtering when enslaving to bridge before link is up"), the switch driver operates the in a mode where a single VLAN can be transmitted as untagged on a particular egress port. That is the "native VLAN on trunk port" use case. The configuration for this native VLAN is driven in 2 ways: - Set the egress port rewriter to strip the VLAN tag for the native VID (as it is egress-untagged, after all). - Configure the ingress port to drop untagged and priority-tagged traffic, if there is no native VLAN. The intention of this setting is that a trunk port with no native VLAN should not accept untagged traffic. Since both of the above configurations for the native VLAN should only be done if VLAN awareness is requested, they are actually done from the ocelot_port_vlan_filtering function, after the basic procedure of toggling the VLAN awareness flag of the port. But there's a problem with that simplistic approach: we are trying to juggle with 2 independent variables from a single function: - Native VLAN of the port - its value is held in port->vid. - VLAN awareness state of the port - currently there are some issues here, more on that later*. The actual problem can be seen when enslaving the switch ports to a VLAN filtering bridge: 0. The driver configures a pvid of zero for each port, when in standalone mode. While the bridge configures a default_pvid of 1 for each port that gets added as a slave to it. 1. The bridge calls ocelot_port_vlan_filtering with vlan_aware=true. The VLAN-filtering-dependent portion of the native VLAN configuration is done, considering that the native VLAN is 0. 2. The bridge calls ocelot_vlan_add with vid=1, pvid=true, untagged=true. The native VLAN changes to 1 (change which gets propagated to hardware). 3. ??? - nobody calls ocelot_port_vlan_filtering again, to reapply the VLAN-filtering-dependent portion of the native VLAN configuration, for the new native VLAN of 1. One can notice that after toggling "ip link set dev br0 type bridge vlan_filtering 0 && ip link set dev br0 type bridge vlan_filtering 1", the new native VLAN finally makes it through and untagged traffic finally starts flowing again. But obviously that shouldn't be needed. So it is clear that 2 independent variables need to both re-trigger the native VLAN configuration. So we introduce the second variable as ocelot_port->vlan_aware. *Actually both the DSA Felix driver and the Ocelot driver already had each its own variable: - Ocelot: ocelot_port_private->vlan_aware - Felix: dsa_port->vlan_filtering but the common Ocelot library needs to work with a single, common, variable, so there is some refactoring done to move the vlan_aware property from the private structure into the common ocelot_port structure. Fixes: 97bb69e1e36e ("net: mscc: ocelot: break apart ocelot_vlan_port_apply") Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Horatiu Vultur <horatiu.vultur@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfDavid S. Miller
Daniel Borkmann says: ==================== pull-request: bpf 2020-04-15 The following pull-request contains BPF updates for your *net* tree. We've added 10 non-merge commits during the last 3 day(s) which contain a total of 11 files changed, 238 insertions(+), 95 deletions(-). The main changes are: 1) Fix offset overflow for BPF_MEM BPF_DW insn mapping on arm32 JIT, from Luke Nelson and Xi Wang. 2) Prevent mprotect() to make frozen & mmap()'ed BPF map writeable again, from Andrii Nakryiko and Jann Horn. 3) Fix type of old_fd in bpf_xdp_set_link_opts to int in libbpf and add selftests, from Toke Høiland-Jørgensen. 4) Fix AF_XDP to check that headroom cannot be larger than the available space in the chunk, from Magnus Karlsson. 5) Fix reset of XDP prog when expected_fd is set, from David Ahern. 6) Fix a segfault in bpftool's struct_ops command when BTF is not available, from Daniel T. Lee. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-15Merge tag 'mac80211-for-net-2020-04-15' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 Johannes Berg says: ==================== A couple of fixes: * FTM responder policy netlink validation fix (but the only user validates again later) * kernel-doc fixes * a fix for a race in mac80211 radio registration vs. userspace * a mesh channel switch fix * a fix for a syzbot reported kasprintf() issue ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-15i2c: tegra: Synchronize DMA before terminationDmitry Osipenko
DMA transfer could be completed, but CPU (which handles DMA interrupt) may get too busy and can't handle the interrupt in a timely manner, despite of DMA IRQ being raised. In this case the DMA state needs to synchronized before terminating DMA transfer in order not to miss the DMA transfer completion. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-04-15i2c: tegra: Better handle case where CPU0 is busy for a long timeDmitry Osipenko
Boot CPU0 always handle I2C interrupt and under some rare circumstances (like running KASAN + NFS root) it may stuck in uninterruptible state for a significant time. In this case we will get timeout if I2C transfer is running on a sibling CPU, despite of IRQ being raised. In order to handle this rare condition, the IRQ status needs to be checked after completion timeout. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-04-15arm64: Delete the space separator in __emit_instFangrui Song
In assembly, many instances of __emit_inst(x) expand to a directive. In a few places __emit_inst(x) is used as an assembler macro argument. For example, in arch/arm64/kvm/hyp/entry.S ALTERNATIVE(nop, SET_PSTATE_PAN(1), ARM64_HAS_PAN, CONFIG_ARM64_PAN) expands to the following by the C preprocessor: alternative_insn nop, .inst (0xd500401f | ((0) << 16 | (4) << 5) | ((!!1) << 8)), 4, 1 Both comma and space are separators, with an exception that content inside a pair of parentheses/quotes is not split, so the clang integrated assembler splits the arguments to: nop, .inst, (0xd500401f | ((0) << 16 | (4) << 5) | ((!!1) << 8)), 4, 1 GNU as preprocesses the input with do_scrub_chars(). Its arm64 backend (along with many other non-x86 backends) sees: alternative_insn nop,.inst(0xd500401f|((0)<<16|(4)<<5)|((!!1)<<8)),4,1 # .inst(...) is parsed as one argument while its x86 backend sees: alternative_insn nop,.inst (0xd500401f|((0)<<16|(4)<<5)|((!!1)<<8)),4,1 # The extra space before '(' makes the whole .inst (...) parsed as two arguments The non-x86 backend's behavior is considered unintentional (https://sourceware.org/bugzilla/show_bug.cgi?id=25750). So drop the space separator inside `.inst (...)` to make the clang integrated assembler work. Suggested-by: Ilie Halip <ilie.halip@gmail.com> Signed-off-by: Fangrui Song <maskray@google.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Link: https://github.com/ClangBuiltLinux/linux/issues/939 Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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