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2020-12-14cifs: remove actimeo from cifs_sbRonnie Sahlberg
Can now be accessed via the ctx Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: remove [gu]id/backup[gu]id/file_mode/dir_mode from cifs_sbRonnie Sahlberg
We can already access these from cifs_sb->ctx so we no longer need a local copy in cifs_sb. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: remove some minor warnings pointed out by kernel test robotSteve French
Correct some trivial warnings caused when new file unc.c was created. For example: In file included from fs/cifs/unc.c:11: >> fs/cifs/cifsproto.h:44:28: warning: 'struct TCP_Server_Info' declared inside parameter list will not be visible outside of this definition or declaration 44 | extern int smb_send(struct TCP_Server_Info *, struct smb_hdr *, Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: remove various function description warningsSteve French
When compiling with W=1 I noticed various functions that did not follow proper style in describing (in the comments) the parameters passed in to the function. For example: fs/cifs/inode.c:2236: warning: Function parameter or member 'mode' not described in 'cifs_wait_bit_killable' I did not address the style warnings in two of the six files (connect.c and misc.c) in order to reduce risk of merge conflict with pending patches. We can update those later. Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: Simplify reconnect code when dfs upcall is enabledSamuel Cabrero
Some witness notifications, like client move, tell the client to reconnect to a specific IP address. In this situation the DFS failover code path has to be skipped so clean up as much as possible the cifs_reconnect() code. Signed-off-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: Send witness register messages to userspace daemon in echo taskSamuel Cabrero
If the daemon starts after mounting a share, or if it crashes, this provides a mechanism to register again. Signed-off-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: Add witness information to debug data dumpSamuel Cabrero
+ Indicate if witness feature is supported + Indicate if witness is used when dumping tcons + Dumps witness registrations. Example: Witness registrations: Id: 1 Refs: 1 Network name: 'fs.fover.ad'(y) Share name: 'share1'(y) \ Ip address: 192.168.103.200(n) Signed-off-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: Set witness notification handler for messages from userspace daemonSamuel Cabrero
+ Set a handler for the witness notification messages received from the userspace daemon. + Handle the resource state change notification. When the resource becomes unavailable or available set the tcp status to CifsNeedReconnect for all channels. Signed-off-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: Send witness register and unregister commands to userspace daemonSamuel Cabrero
+ Define the generic netlink family commands and message attributes to communicate with the userspace daemon + The register and unregister commands are sent when connecting or disconnecting a tree. The witness registration keeps a pointer to the tcon and has the same lifetime. + Each registration has an id allocated by an IDR. This id is sent to the userspace daemon in the register command, and will be included in the notification messages from the userspace daemon to retrieve from the IDR the matching registration. + The authentication information is bundled in the register message. If kerberos is used the message just carries a flag. Signed-off-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: minor updates to KconfigSteve French
Correct references to fs/cifs/README which has been replaced by Documentation/filesystems/admin-guide/cifs/usage.rst, and also correct a typo. Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: add witness mount option and data structsSamuel Cabrero
Add 'witness' mount option to register for witness notifications. Signed-off-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: Register generic netlink familySamuel Cabrero
Register a new generic netlink family to talk to the witness service userspace daemon. Signed-off-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: cleanup misc.cSteve French
misc.c was getting a little large, move two of the UNC parsing relating functions to a new C file unc.c which makes the coding of the upcoming witness protocol patch series a little cleaner as well. Suggested-by: Rafal Szczesniak <rafal@elbingbrewery.org> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: minor kernel style fixes for commentsSteve French
Trivial fix for a few comments which didn't follow kernel style Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: Make extract_sharename function publicSamuel Cabrero
Move the function to misc.c Signed-off-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: Make extract_hostname function publicSamuel Cabrero
Move the function to misc.c and give it a public header. Signed-off-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14MIPS: Select ARCH_KEEP_MEMBLOCK if DEBUG_KERNEL to enable sysfs memblock debugTiezhu Yang
In the current code, CONFIG_ARCH_KEEP_MEMBLOCK is not set for MIPS arch, memblock_discard() will discard memory and reserved arrays if they were allocated, select ARCH_KEEP_MEMBLOCK if DEBUG_KERNEL to give a chance to track "memory" and "reserved" memblocks after early boot, with this patch, we can see the following two sysfs interfaces under DEBUG_FS. /sys/kernel/debug/memblock/memory /sys/kernel/debug/memblock/reserved Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-12-14mips: lib: uncached: fix non-standard usage of variable 'sp'Anders Roxell
When building mips tinyconfig with clang the following warning show up: arch/mips/lib/uncached.c:45:6: warning: variable 'sp' is uninitialized when used here [-Wuninitialized] if (sp >= (long)CKSEG0 && sp < (long)CKSEG2) ^~ arch/mips/lib/uncached.c:40:18: note: initialize the variable 'sp' to silence this warning register long sp __asm__("$sp"); ^ = 0 1 warning generated. Rework to make an explicit inline move, instead of the non-standard use of specifying registers for local variables. This is what's written from the gcc-10 manual [1] about specifying registers for local variables: "6.47.5.2 Specifying Registers for Local Variables ................................................. [...] "The only supported use for this feature is to specify registers for input and output operands when calling Extended 'asm' (*note Extended Asm::). [...]". [1] https://docs.w3cub.com/gcc~10/local-register-variables Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Reported-by: Nathan Chancellor <natechancellor@gmail.com> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-12-14Merge tag 'asoc-v5.11' of ↵Takashi Iwai
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus ASoC: Updates for v5.11 There's a lot of changes here but mostly cleanups and driver specific things, the most user visible change is the support for boot time selection of Intel DSP firmware which will make it easier for people to move over to the preferred modern implementations in distros and other large scale deployments. This also includes a merge of the new auxillary bus which was done in anticipation of use by the Intel DSP drivers which didn't quite make it. - Lots more cleanups and simplifications from Morimoto-san. - Support for some basic DPCM systems in the audio graph card from Sameer Pujar. - Remove some old pre-DT Freescale drivers for platforms that are now DT only. - Move selection of which Intel DSP implementation to use to boot time rather than requiring it to be selected at build time. - Support for Allwinner H6 I2S, Analog Devices ADAU1372, Intel Alderlake-S, GMediatek MT8192, NXP i.MX HDMI and XCVR, Realtek RT715, Qualcomm SM8250 and simple GPIO based muxes.
2020-12-14dt-bindings: Remove PicoXcell bindingsRob Herring
PicoXcell has had nothing but treewide cleanups for at least the last 8 years and no signs of activity. The most recent activity is a yocto vendor kernel based on v3.0 in 2015. Cc: linux-crypto@vger.kernel.org Acked-by: Jamie Iles <jamie@jamieiles.com> Link: https://lore.kernel.org/r/20201210200315.2965567-5-robh@kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
2020-12-14ARM: dts: lpc32xx: Remove unused and undocumented 'pnx,timeout'Rob Herring
'pnx,timeout' is unused, undocumented and 'pnx' is not a vendor prefix, so let's remove it. Acked-by: Vladimir Zapolskiy <vz@mleia.com> Cc: Sylvain Lemieux <slemieux.tyco@gmail.com> Link: https://lore.kernel.org/r/20201210175238.2721550-1-robh@kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
2020-12-14ovl: unprivieged mountsMiklos Szeredi
Enable unprivileged user namespace mounts of overlayfs. Overlayfs's permission model (*) ensures that the mounter itself cannot gain additional privileges by the act of creating an overlayfs mount. This feature request is coming from the "rootless" container crowd. (*) Documentation/filesystems/overlayfs.txt#Permission model Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2020-12-14ovl: do not get metacopy for userxattrMiklos Szeredi
When looking up an inode on the lower layer for which the mounter lacks read permisison the metacopy check will fail. This causes the lookup to fail as well, even though the directory is readable. So ignore EACCES for the "userxattr" case and assume no metacopy for the unreadable file. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2020-12-14ovl: do not fail because of O_NOATIMEMiklos Szeredi
In case the file cannot be opened with O_NOATIME because of lack of capabilities, then clear O_NOATIME instead of failing. Remove WARN_ON(), since it would now trigger if O_NOATIME was cleared. Noticed by Amir Goldstein. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2020-12-14ovl: do not fail when setting origin xattrMiklos Szeredi
Comment above call already says this, but only EOPNOTSUPP is ignored, other failures are not. For example setting "user.*" will fail with EPERM on symlink/special. Ignore this error as well. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2020-12-14ovl: user xattrMiklos Szeredi
Optionally allow using "user.overlay." namespace instead of "trusted.overlay." This is necessary for overlayfs to be able to be mounted in an unprivileged namepsace. Make the option explicit, since it makes the filesystem format be incompatible. Disable redirect_dir and metacopy options, because these would allow privilege escalation through direct manipulation of the "user.overlay.redirect" or "user.overlay.metacopy" xattrs. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Reviewed-by: Amir Goldstein <amir73il@gmail.com>
2020-12-14ovl: simplify file spliceMiklos Szeredi
generic_file_splice_read() and iter_file_splice_write() will call back into f_op->iter_read() and f_op->iter_write() respectively. These already do the real file lookup and cred override. So the code in ovl_splice_read() and ovl_splice_write() is redundant. In addition the ovl_file_accessed() call in ovl_splice_write() is incorrect, though probably harmless. Fix by calling generic_file_splice_read() and iter_file_splice_write() directly. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2020-12-14ovl: make ioctl() safeMiklos Szeredi
ovl_ioctl_set_flags() does a capability check using flags, but then the real ioctl double-fetches flags and uses potentially different value. The "Check the capability before cred override" comment misleading: user can skip this check by presenting benign flags first and then overwriting them to non-benign flags. Just remove the cred override for now, hoping this doesn't cause a regression. The proper solution is to create a new setxflags i_op (patches are in the works). Xfstests don't show a regression. Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Fixes: dab5ca8fd9dd ("ovl: add lsattr/chattr support") Cc: <stable@vger.kernel.org> # v4.19
2020-12-14ovl: check privs before decoding file handleMiklos Szeredi
CAP_DAC_READ_SEARCH is required by open_by_handle_at(2) so check it in ovl_decode_real_fh() as well to prevent privilege escalation for unprivileged overlay mounts. [Amir] If the mounter is not capable in init ns, ovl_check_origin() and ovl_verify_index() will not function as expected and this will break index and nfs export features. So check capability in ovl_can_decode_fh(), to auto disable those features. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2020-12-14vfs: verify source area in vfs_dedupe_file_range_one()Miklos Szeredi
Call remap_verify_area() on the source file as well as the destination. When called from vfs_dedupe_file_range() the check as already been performed, but not so if called from layered fs (overlayfs, etc...) Could ommit the redundant check in vfs_dedupe_file_range(), but leave for now to get error early (for fear of breaking backward compatibility). This call shouldn't be performance sensitive. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2020-12-14vfs: move cap_convert_nscap() call into vfs_setxattr()Miklos Szeredi
cap_convert_nscap() does permission checking as well as conversion of the xattr value conditionally based on fs's user-ns. This is needed by overlayfs and probably other layered fs (ecryptfs) and is what vfs_foo() is supposed to do anyway. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Acked-by: James Morris <jamorris@linux.microsoft.com>
2020-12-14Merge branch 'for-5.11' into for-linusPetr Mladek
2020-12-14Merge branch 'for-5.11-null-console' into for-linusPetr Mladek
2020-12-14can: m_can: use struct m_can_classdev as drvdataMarc Kleine-Budde
The m_can driver's suspend and resume functions (m_can_class_suspend() and m_can_class_resume()) make use of dev_get_drvdata() and assume that the drvdata is a pointer to the struct net_device. With upcoming conversion of the tcan4x5x driver to pm_runtime this assumption is no longer valid. As the suspend and resume functions actually need a struct m_can_classdev pointer, change the m_can_platform and the m_can_pci driver to hold a pointer to struct m_can_classdev instead, as the tcan4x5x driver already does. Link: https://lore.kernel.org/r/20201212175518.139651-8-mkl@pengutronix.de Reviewed-by: Sean Nyekjaer <sean@geanix.com> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2020-12-14can: m_can: let m_can_class_allocate_dev() allocate driver specific private dataMarc Kleine-Budde
This patch enhances m_can_class_allocate_dev() to allocate driver specific private data. The driver's private data struct must contain struct m_can_classdev as its first member followed by the remaining private data. Link: https://lore.kernel.org/r/20201212175518.139651-7-mkl@pengutronix.de Reviewed-by: Sean Nyekjaer <sean@geanix.com> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2020-12-14can: m_can: m_can_clk_start(): make use of pm_runtime_resume_and_get()Marc Kleine-Budde
With patch | dd8088d5a896 PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter the usual pm_runtime_get_sync() and pm_runtime_put_noidle() in-case-of-error dance is no longer needed. Convert the m_can driver to use this function. Link: https://lore.kernel.org/r/20201212175518.139651-6-mkl@pengutronix.de Reviewed-by: Sean Nyekjaer <sean@geanix.com> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2020-12-14can: m_can: m_can_config_endisable(): mark as staticMarc Kleine-Budde
The function m_can_config_endisable() is not used outside of the m_can driver, so mark it as static. Link: https://lore.kernel.org/r/20201212175518.139651-5-mkl@pengutronix.de Reviewed-by: Sean Nyekjaer <sean@geanix.com> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2020-12-14can: m_can: use cdev as name for struct m_can_classdev uniformlyMarc Kleine-Budde
This patch coverts the m_can driver to use cdev as name for struct m_can_classdev uniformly throughout the whole driver. Link: https://lore.kernel.org/r/20201212175518.139651-4-mkl@pengutronix.de Reviewed-by: Sean Nyekjaer <sean@geanix.com> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2020-12-14can: m_can: convert indention to kernel coding styleMarc Kleine-Budde
This patch converts the indention in the m_can driver to kernel coding style. Link: https://lore.kernel.org/r/20201212175518.139651-3-mkl@pengutronix.de Reviewed-by: Sean Nyekjaer <sean@geanix.com> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2020-12-14can: m_can: update link to M_CAN user manualMarc Kleine-Budde
Old versions of the user manual are regularly depublished, so change link to the linux-can github page, which has a mirror off all published datasheets. Link: https://lore.kernel.org/r/20201212175518.139651-2-mkl@pengutronix.de Reviewed-by: Sean Nyekjaer <sean@geanix.com> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2020-12-14powerpc/64s: Mark the kuap/kuep functions non __initAneesh Kumar K.V
The kernel calls these functions on CPU online and hence they must not be marked __init. Otherwise if the memory they occupied has been reused the system can crash in various ways. Sachin reported it caused his LPAR to spontaneously restart with no other output. With xmon enabled it may drop into xmon with a dump like: cpu 0x1: Vector: 700 (Program Check) at [c000000003c5fcb0] pc: 00000000011e0a78 lr: 00000000011c51d4 sp: c000000003c5ff50 msr: 8000000000081001 current = 0xc000000002c12b00 paca = 0xc000000003cff280 irqmask: 0x03 irq_happened: 0x01 pid = 0, comm = swapper/1 ... [c000000003c5ff50] 0000000000087c38 (unreliable) [c000000003c5ff70] 000000000003870c [c000000003c5ff90] 000000000000d108 Fixes: 3b47b7549ead ("powerpc/book3s64/kuap: Move KUAP related function outside radix") Reported-by: Sachin Sant <sachinp@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> [mpe: Expand change log with details and xmon output] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20201214080121.358567-1-aneesh.kumar@linux.ibm.com
2020-12-14NFSv4.2/pnfs: Don't use READ_PLUS with pNFS yetTrond Myklebust
We have no way of tracking server READ_PLUS support in pNFS for now, so just disable it. Reported-by: "Mkrtchyan, Tigran" <tigran.mkrtchyan@desy.de> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-14NFSv4.2: Deal with potential READ_PLUS data extent buffer overflowTrond Myklebust
If the server returns more data than we have buffer space for, then we need to truncate and exit early. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-14NFSv4.2: Don't error when exiting early on a READ_PLUS buffer overflowTrond Myklebust
Expanding the READ_PLUS extents can cause the read buffer to overflow. If it does, then don't error, but just exit early. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-14NFSv4.2: Handle hole lengths that exceed the READ_PLUS read bufferTrond Myklebust
If a hole extends beyond the READ_PLUS read buffer, then we want to fill just the remaining buffer with zeros. Also ignore eof... Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-14NFSv4.2: decode_read_plus_hole() needs to check the extent offsetTrond Myklebust
The server is allowed to return a hole extent with an offset that starts before the offset supplied in the READ_PLUS argument. Ensure that we support that case too. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-14NFSv4.2: decode_read_plus_data() must skip padding after data segmentTrond Myklebust
All XDR opaque object sizes are 32-bit aligned, and a data segment is no exception. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-14NFSv4.2: Ensure we always reset the result->count in decode_read_plus()Trond Myklebust
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-14SUNRPC: When expanding the buffer, we may need grow the sparse pagesTrond Myklebust
If we're shifting the page data to the right, and this happens to be a sparse page array, then we may need to allocate new pages in order to receive the data. Reported-by: "Mkrtchyan, Tigran" <tigran.mkrtchyan@desy.de> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-14SUNRPC: Cleanup - constify a number of xdr_buf helpersTrond Myklebust
There are a number of xdr helpers for struct xdr_buf that do not change the structure itself. Mark those as taking const pointers for documentation purposes. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
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