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2020-08-03netfilter: flowtable: Set offload timeout when adding flowRoi Dayan
On heavily loaded systems the GC can take time to go over all existing conns and reset their timeout. At that time other calls like from nf_conntrack_in() can call of nf_ct_is_expired() and see the conn as expired. To fix this when we set the offload bit we should also reset the timeout instead of counting on GC to finish first iteration over all conns before the initial timeout. Fixes: 90964016e5d3 ("netfilter: nf_conntrack: add IPS_OFFLOAD status bit") Signed-off-by: Roi Dayan <roid@mellanox.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-08-03netfilter: conntrack: Move nf_ct_offload_timeout to header fileRoi Dayan
To be used by callers from other modules. [ Rename DAY to NF_CT_DAY to avoid possible symbol name pollution issue --Pablo ] Signed-off-by: Roi Dayan <roid@mellanox.com> Reviewed-by: Oz Shlomo <ozsh@mellanox.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-08-03selftests: netfilter: add meta iif/oif match testFlorian Westphal
simple test case, but would have caught this: FAIL: iifgroupcount, want "packets 2", got table inet filter { counter iifgroupcount { packets 0 bytes 0 } } Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-08-03ceph: remove redundant initialization of variable mdsColin Ian King
The variable mds 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> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: fix use-after-free for fsc->mdscXiubo Li
If the ceph_mdsc_init() fails, it will free the mdsc already. Reported-by: syzbot+b57f46d8d6ea51960b8c@syzkaller.appspotmail.com Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: remove unused variables in ceph_mdsmap_decode()Jia Yang
Fix build warnings: fs/ceph/mdsmap.c: In function ‘ceph_mdsmap_decode’: fs/ceph/mdsmap.c:192:7: warning: variable ‘info_cv’ set but not used [-Wunused-but-set-variable] fs/ceph/mdsmap.c:177:7: warning: variable ‘state_seq’ set but not used [-Wunused-but-set-variable] fs/ceph/mdsmap.c:123:15: warning: variable ‘mdsmap_cv’ set but not used [-Wunused-but-set-variable] Note that p is increased in ceph_decode_*. Signed-off-by: Jia Yang <jiayang5@huawei.com> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: delete repeated words in fs/ceph/Randy Dunlap
Drop duplicated words "down" and "the" in fs/ceph/. [ idryomov: merge into a single patch ] Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: send client provided metric flags in client metadataXiubo Li
Send metric flags to the MDS, indicating what metrics the client supports. Currently that consists of cap statistics, and read, write and metadata latencies. URL: https://tracker.ceph.com/issues/43435 Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: periodically send perf metrics to MDSesXiubo Li
This will send the caps/read/write/metadata metrics to any available MDS once per second, which will be the same as the userland client. It will skip the MDS sessions which don't support the metric collection, as the MDSs will close socket connections when they get an unknown type message. We can disable the metric sending via the disable_send_metrics module parameter. [ jlayton: fix up endianness bug in ceph_mdsc_send_metrics() ] URL: https://tracker.ceph.com/issues/43215 Signed-off-by: Xiubo Li <xiubli@redhat.com> Signed-off-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: check the sesion state and return false in case it is closedXiubo Li
If the session is already in closed state, we should skip it. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03libceph: replace HTTP links with HTTPS onesAlexander A. Klimov
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. [ idryomov: Do the same for the CRUSH paper and replace ceph.newdream.net with ceph.io. ] Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: remove unnecessary cast in kfree()Xu Wang
Remove unnecassary casts in the argument to kfree. Signed-off-by: Xu Wang <vulab@iscas.ac.cn> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03libceph: just have osd_req_op_init() return a pointerJeff Layton
The caller can just ignore the return. No need for this wrapper that just casts the other function to void. [ idryomov: argument alignment ] Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: do not access the kiocb after aio requestsXiubo Li
In aio case, if the completion comes very fast just before the ceph_read_iter() returns to fs/aio.c, the kiocb will be freed in the completion callback, then if ceph_read_iter() access again we will potentially hit the use-after-free bug. [ jlayton: initialize direct_lock early, and use it everywhere ] URL: https://tracker.ceph.com/issues/45649 Signed-off-by: Xiubo Li <xiubli@redhat.com> Signed-off-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: clean up and optimize ceph_check_delayed_caps()Jeff Layton
Make this loop look a bit more sane. Also optimize away the spinlock release/reacquire if we can't get an inode reference. Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Xiubo Li <xiubli@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: fix potential mdsc use-after-free crashXiubo Li
Make sure the delayed work stopped before releasing the resources. cancel_delayed_work_sync() will only guarantee that the work finishes executing if the work is already in the ->worklist. That means after the cancel_delayed_work_sync() returns, it will leave the work requeued if it was rearmed at the end. That can lead to a use after free once the work struct is freed. Fix it by flushing the delayed work instead of trying to cancel it, and ensure that the work doesn't rearm if the mdsc is stopping. URL: https://tracker.ceph.com/issues/46293 Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: switch to WARN_ON_ONCE in encode_supported_features()Xiubo Li
...and let the errnos bubble up to the callers. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: add global total_caps to count the mdsc's total caps numberXiubo Li
This will help to reduce using the global mdsc->mutex lock in many places. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03ceph: add check_session_state() helper and make it globalXiubo Li
And remove the unsed mdsc parameter to simplify the code. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03mac80211: fix misplaced while instead of ifJohannes Berg
This never was intended to be a 'while' loop, it should've just been an 'if' instead of 'while'. Fix this. I noticed this while applying another patch from Ben that intended to fix a busy loop at this spot. Cc: stable@vger.kernel.org Fixes: b16798f5b907 ("mac80211: mark station unauthorized before key removal") Reported-by: Ben Greear <greearb@candelatech.com> Link: https://lore.kernel.org/r/20200803110209.253009ae41ff.I3522aad099392b31d5cf2dcca34cbac7e5832dde@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-08-03libceph: dump class and method names on method callsIlya Dryomov
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-03libceph: use target_copy() in send_linger()Ilya Dryomov
Instead of copying just oloc, oid and flags, copy the entire linger target. This is more for consistency than anything else, as send_linger() -> submit_request() -> __submit_request() sends the request regardless of what calc_target() says (i.e. both on CALC_TARGET_NO_ACTION and CALC_TARGET_NEED_RESEND). Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jeff Layton <jlayton@kernel.org>
2020-08-03nl80211: use eth_zero_addr() to clear mac addressMiaohe Lin
Use eth_zero_addr() to clear mac address instead of memset(). Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Link: https://lore.kernel.org/r/1596273349-24333-1-git-send-email-linmiaohe@huawei.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-08-03mac80211: use eth_zero_addr() to clear mac addressMiaohe Lin
Use eth_zero_addr() to clear mac address instead of memset(). Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Link: https://lore.kernel.org/r/1596273158-24183-1-git-send-email-linmiaohe@huawei.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-08-03mac8211: fix struct initialisationJohn Crispin
Sparse showed up with the following error. net/mac80211/agg-rx.c:480:43: warning: Using plain integer as NULL pointer Fixes: 2ab45876756f (mac80211: add support for the ADDBA extension element) Signed-off-by: John Crispin <john@phrozen.org> Link: https://lore.kernel.org/r/20200803084540.179908-1-john@phrozen.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-08-03mac80211: Handle special status codes in SAE commitJouni Malinen
SAE authentication has been extended with H2E (IEEE 802.11 REVmd) and PK (WFA) options. Those extensions use special status code values in the SAE commit messages (Authentication frame with transaction sequence number 1) to identify which extension is in use. mac80211 was interpreting those new values as the AP denying authentication and that resulted in failure to complete SAE authentication in some cases. Fix this by adding exceptions for the new status code values 126 and 127. Signed-off-by: Jouni Malinen <jouni@codeaurora.org> Link: https://lore.kernel.org/r/20200731183830.18735-1-jouni@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-08-03Revert "ALSA: hda: call runtime_allow() for all hda controllers"Hui Wang
This reverts commit 9a6418487b56 ("ALSA: hda: call runtime_allow() for all hda controllers"). The reverted patch already introduced some regressions on some machines: - on gemini-lake machines, the error of "azx_get_response timeout" happens in the hda driver. - on the machines with alc662 codec, the audio jack detection doesn't work anymore. Fixes: 9a6418487b56 ("ALSA: hda: call runtime_allow() for all hda controllers") BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=208511 Cc: <stable@vger.kernel.org> Signed-off-by: Hui Wang <hui.wang@canonical.com> Link: https://lore.kernel.org/r/20200803064638.6139-1-hui.wang@canonical.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
2020-08-02md/raid5: Allow degraded raid6 to do rmwChangSyun Peng
Degraded raid6 always do reconstruct-write now. With raid6 xor supported, we can do rmw in degraded raid6. This patch can reduce many read IOs to improve performance. If the failed disk is P, Q or the disk we want to write to, we may need to do reconstruct-write in max degraded raid6. In this situation we can not read enough data from handle_stripe_dirtying() so we have to set force_rcw in handle_stripe_fill() to read all data. Reviewed-by: Alex Wu <alexwu@synology.com> Reviewed-by: BingJing Chang <bingjingc@synology.com> Reviewed-by: Danny Shih <dannyshih@synology.com> Signed-off-by: ChangSyun Peng <allenpeng@synology.com> Signed-off-by: Song Liu <songliubraving@fb.com>
2020-08-02md/raid5: Fix Force reconstruct-write io stuck in degraded raid5ChangSyun Peng
In degraded raid5, we need to read parity to do reconstruct-write when data disks fail. However, we can not read parity from handle_stripe_dirtying() in force reconstruct-write mode. Reproducible Steps: 1. Create degraded raid5 mdadm -C /dev/md2 --assume-clean -l5 -n3 /dev/sda2 /dev/sdb2 missing 2. Set rmw_level to 0 echo 0 > /sys/block/md2/md/rmw_level 3. IO to raid5 Now some io may be stuck in raid5. We can use handle_stripe_fill() to read the parity in this situation. Cc: <stable@vger.kernel.org> # v4.4+ Reviewed-by: Alex Wu <alexwu@synology.com> Reviewed-by: BingJing Chang <bingjingc@synology.com> Reviewed-by: Danny Shih <dannyshih@synology.com> Signed-off-by: ChangSyun Peng <allenpeng@synology.com> Signed-off-by: Song Liu <songliubraving@fb.com>
2020-08-03Revert "xen/balloon: Fix crash when ballooning on x86 32 bit PAE"Roger Pau Monne
This reverts commit dfd74a1edfaba5864276a2859190a8d242d18952. This has been fixed by commit dca4436d1cf9e0d237c which added the out of bounds check to __add_memory, so that trying to add blocks past MAX_PHYSMEM_BITS will fail. Note the check in the Xen balloon driver was bogus anyway, as it checked the start address of the resource, but it should instead test the end address to assert the whole resource falls below MAX_PHYSMEM_BITS. Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/20200727091342.52325-4-roger.pau@citrix.com Signed-off-by: Juergen Gross <jgross@suse.com>
2020-08-03xen/balloon: make the balloon wait interruptibleRoger Pau Monne
So it can be killed, or else processes can get hung indefinitely waiting for balloon pages. Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200727091342.52325-3-roger.pau@citrix.com Signed-off-by: Juergen Gross <jgross@suse.com>
2020-08-03xen/balloon: fix accounting in alloc_xenballooned_pages error pathRoger Pau Monne
target_unpopulated is incremented with nr_pages at the start of the function, but the call to free_xenballooned_pages will only subtract pgno number of pages, and thus the rest need to be subtracted before returning or else accounting will be skewed. Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200727091342.52325-2-roger.pau@citrix.com Signed-off-by: Juergen Gross <jgross@suse.com>
2020-08-03ALSA: hda/ca0132 - Fix AE-5 microphone selection commands.Connor McAdams
The ca0113 command had the wrong group_id, 0x48 when it should've been 0x30. The front microphone selection should now work. Signed-off-by: Connor McAdams <conmanx360@gmail.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20200803002928.8638-3-conmanx360@gmail.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
2020-08-03ALSA: hda/ca0132 - Add new quirk ID for Recon3D.Connor McAdams
Add a new quirk ID for the Recon3D, as tested by me. Signed-off-by: Connor McAdams <conmanx360@gmail.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20200803002928.8638-2-conmanx360@gmail.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
2020-08-03ALSA: hda/ca0132 - Fix ZxR Headphone gain control get value.Connor McAdams
When the ZxR headphone gain control was added, the ca0132_switch_get function was not updated, which meant that the changes to the control state were not saved when entering/exiting alsamixer. Signed-off-by: Connor McAdams <conmanx360@gmail.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20200803002928.8638-1-conmanx360@gmail.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
2020-08-03Merge branch 'for-next' into for-linusTakashi Iwai
2020-08-02raid5: don't duplicate code for different paths in handle_stripeGuoqing Jiang
As we can see, R5_LOCKED is set and s.locked is increased whether R5_ReWrite is set or not, so move it to common path. Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by: Song Liu <songliubraving@fb.com>
2020-08-02raid5-cache: hold spinlock instead of mutex in r5c_journal_mode_showGuoqing Jiang
Replace mddev_lock with spin_lock to align with other show methods in raid5_attrs. Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by: Song Liu <songliubraving@fb.com>
2020-08-02md: print errno in super_writtenGuoqing Jiang
It is better to print errno instead of bi_status. Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by: Song Liu <songliubraving@fb.com>
2020-08-02md/raid5: remove the redundant setting of STRIPE_HANDLEGuoqing Jiang
The flag is already set before compare rcw with rmw, so it is not necessary to do it again. Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by: Song Liu <songliubraving@fb.com>
2020-08-02md: register new md sysfs file 'uuid' read-onlySebastian Parschauer
Report the UUID of the MD array in the following format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx This is useful if you don't want to wait for udev to identify array. And it is also easy for script to monitor it with the format. Signed-off-by: Sebastian Parschauer <s.parschauer@gmx.de> [Guoqing: mention the change in md.rst] Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by: Song Liu <songliubraving@fb.com>
2020-08-02md: fix max sectors calculation for super 1.0Xiao Ni
To grow size of super 1.0 raid array, it is necessary to check the device max usable size. Now it uses rdev->sectors for max usable size. If one disk is 500G and the raid device only uses the 100GB of this disk. rdev->sectors can't tell the real max usable size. The max usable size should be dev_size-(superblock_size+bitmap_size+badblock_size). Also, remove unnecessary sb_start update in super_1_rdev_size_change(). Signed-off-by: Xiao Ni <xni@redhat.com> Signed-off-by: Song Liu <songliubraving@fb.com>
2020-08-03xen: hypercall.h: fix duplicated wordRandy Dunlap
Change the repeated word "as" to "as a". Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Juergen Gross <jgross@suse.com> Cc: xen-devel@lists.xenproject.org Link: https://lore.kernel.org/r/20200726001731.19540-1-rdunlap@infradead.org Signed-off-by: Juergen Gross <jgross@suse.com>
2020-08-03xen/gntdev: gntdev.h: drop a duplicated wordRandy Dunlap
Drop the repeated word "of" in a comment. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Juergen Gross <jgross@suse.com> Cc: xen-devel@lists.xenproject.org Link: https://lore.kernel.org/r/20200719003317.21454-1-rdunlap@infradead.org Signed-off-by: Juergen Gross <jgross@suse.com>
2020-08-03xen/privcmd: Convert get_user_pages*() to pin_user_pages*()Souptick Joarder
In 2019, we introduced pin_user_pages*() and now we are converting get_user_pages*() to the new API as appropriate. [1] & [2] could be referred for more information. This is case 5 as per document [1]. [1] Documentation/core-api/pin_user_pages.rst [2] "Explicit pinning of user-space pages": https://lwn.net/Articles/807108/ Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Juergen Gross <jgross@suse.com> Reviewed-by: Paul Durrant <paul@xen.org> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Paul Durrant <xadimgnik@gmail.com> Link: https://lore.kernel.org/r/1594525195-28345-4-git-send-email-jrdr.linux@gmail.com Signed-off-by: Juergen Gross <jgross@suse.com>
2020-08-03xen/privcmd: Mark pages as dirtySouptick Joarder
pages need to be marked as dirty before unpinned it in unlock_pages() which was oversight. This is fixed now. Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Suggested-by: John Hubbard <jhubbard@nvidia.com> Reviewed-by: Juergen Gross <jgross@suse.com> Reviewed-by: Paul Durrant <paul@xen.org> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Paul Durrant <xadimgnik@gmail.com> Link: https://lore.kernel.org/r/1594525195-28345-3-git-send-email-jrdr.linux@gmail.com Signed-off-by: Juergen Gross <jgross@suse.com>
2020-08-03xen/privcmd: Corrected error handling pathSouptick Joarder
Previously, if lock_pages() end up partially mapping pages, it used to return -ERRNO due to which unlock_pages() have to go through each pages[i] till *nr_pages* to validate them. This can be avoided by passing correct number of partially mapped pages & -ERRNO separately, while returning from lock_pages() due to error. With this fix unlock_pages() doesn't need to validate pages[i] till *nr_pages* for error scenario and few condition checks can be ignored. Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Juergen Gross <jgross@suse.com> Reviewed-by: Paul Durrant <paul@xen.org> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Paul Durrant <xadimgnik@gmail.com> Link: https://lore.kernel.org/r/1594525195-28345-2-git-send-email-jrdr.linux@gmail.com Signed-off-by: Juergen Gross <jgross@suse.com>
2020-08-02list: add "list_del_init_careful()" to go with "list_empty_careful()"Linus Torvalds
That gives us ordering guarantees around the pair. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-02mm: rewrite wait_on_page_bit_common() logicLinus Torvalds
It turns out that wait_on_page_bit_common() had several problems, ranging from just unfair behavioe due to re-queueing at the end of the wait queue when re-trying, and an outright bug that could result in missed wakeups (but probably never happened in practice). This rewrites the whole logic to avoid both issues, by simply moving the logic to check (and possibly take) the bit lock into the wakeup path instead. That makes everything much more straightforward, and means that we never need to re-queue the wait entry: if we get woken up, we'll be notified through WQ_FLAG_WOKEN, and the wait queue entry will have been removed, and everything will have been done for us. Link: https://lore.kernel.org/lkml/CAHk-=wjJA2Z3kUFb-5s=6+n0qbTs8ELqKFt9B3pH85a8fGD73w@mail.gmail.com/ Link: https://lore.kernel.org/lkml/alpine.LSU.2.11.2007221359450.1017@eggly.anvils/ Reported-by: Oleg Nesterov <oleg@redhat.com> Reported-by: Hugh Dickins <hughd@google.com> Cc: Michal Hocko <mhocko@suse.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-02cifs: document and cleanup dfs mountPaulo Alcantara
cifs_mount() for DFS mounts is for a long time way too complex to follow, mostly because it lacks some documentation, does a lot of operations like resolving DFS roots and links, checking for path components, perform failover, crap code, etc. Besides adding some documentation to it, do some cleanup and ensure that the following is implemented and supported: * non-DFS mounts * DFS failover * DFS root mounts - tcon and cifs_sb must contain DFS path (NOT including prefix) - if prefix path, then save it in cifs_sb and it must not be changed * DFS link mounts - tcon and cifs_sb must contain DFS path (including prefix) - if prefix path, then save it in cifs_sb and it may be changed * prevent recursion on broken link referrals (MAX_NESTED_LINKS) * check every path component of the currently resolved target (including prefix), and chase them accordingly * make sure that DFS referrals go through newly resolved root servers Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
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