- 15 Mar, 2017 7 commits
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Gerald Schaefer authored
commit a63f53e3 upstream. Since commit dd22f551 "block: Change direct_access calling convention", the device size calculation in dcssblk_direct_access() is off-by-one. This results in bdev_direct_access() always returning -ENXIO because the returned value is not page aligned. Fix this by adding 1 to the dev_sz calculation. Fixes: dd22f551 ("block: Change direct_access calling convention") Signed-off-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Julian Wiedmann authored
commit 1e4a382f upstream. For devices with multiple input queues, tiqdio_call_inq_handlers() iterates over all input queues and clears the device's DSCI during each iteration. If the DSCI is re-armed during one of the later iterations, we therefore do not scan the previous queues again. The re-arming also raises a new adapter interrupt. But its handler does not trigger a rescan for the device, as the DSCI has already been erroneously cleared. This can result in queue stalls on devices with multiple input queues. Fix it by clearing the DSCI just once, prior to scanning the queues. As the code is moved in front of the loop, we also need to access the DSCI directly (ie irq->dsci) instead of going via each queue's parent pointer to the same irq. This is not a functional change, and a follow-up patch will clean up the other users. In practice, this bug only affects CQ-enabled HiperSockets devices, ie. devices with sysfs-attribute "hsuid" set. Setting a hsuid is needed for AF_IUCV socket applications that use HiperSockets communication. Fixes: 104ea556 ("qdio: support asynchronous delivery of storage blocks") Reviewed-by:
Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by:
Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by:
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Dmitry Tunin authored
commit 441ad62d upstream. T: Bus=01 Lev=01 Prnt=01 Port=07 Cnt=04 Dev#= 5 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=04ca ProdID=3018 Rev=00.01 C: #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb I: If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb Signed-off-by:
Dmitry Tunin <hanipouspilot@gmail.com> Signed-off-by:
Marcel Holtmann <marcel@holtmann.org> Signed-off-by:
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Chao Peng authored
commit 96794e4e upstream. Guest segment selector is 16 bit field and guest segment base is natural width field. Fix two incorrect invocations accordingly. Without this patch, build fails when aggressive inlining is used with ICC. Signed-off-by:
Chao Peng <chao.p.peng@linux.intel.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
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Janosch Frank authored
commit e1e8a962 upstream. User controlled KVM guests do not support the dirty log, as they have no single gmap that we can check for changes. As they have no single gmap, kvm->arch.gmap is NULL and all further referencing to it for dirty checking will result in a NULL dereference. Let's return -EINVAL if a caller tries to sync dirty logs for a UCONTROL guest. Fixes: 15f36ebd ("KVM: s390: Add proper dirty bitmap support to S390 kvm.") Signed-off-by:
Janosch Frank <frankja@linux.vnet.ibm.com> Reported-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
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Ian Abbott authored
commit 1c9c858e upstream. The MKS Instruments SCOM-0800 and SCOM-0801 cards (originally by Tenta Technologies) are 3U CompactPCI serial cards with 4 and 8 serial ports, respectively. The first 4 ports are implemented by an OX16PCI954 chip, and the second 4 ports are implemented by an OX16C954 chip on a local bus, bridged by the second PCI function of the OX16PCI954. The ports are jumper-selectable as RS-232 and RS-422/485, and the UARTs use a non-standard oscillator frequency of 20 MHz (base_baud = 1250000). Signed-off-by:
Ian Abbott <abbotti@mev.co.uk> Signed-off-by:
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Alexander Popov authored
commit 82f2341c upstream. Currently N_HDLC line discipline uses a self-made singly linked list for data buffers and has n_hdlc.tbuf pointer for buffer retransmitting after an error. The commit be10eb75 ("tty: n_hdlc add buffer flushing") introduced racy access to n_hdlc.tbuf. After tx error concurrent flush_tx_queue() and n_hdlc_send_frames() can put one data buffer to tx_free_buf_list twice. That causes double free in n_hdlc_release(). Let's use standard kernel linked list and get rid of n_hdlc.tbuf: in case of tx error put current data buffer after the head of tx_buf_list. Signed-off-by:
Alexander Popov <alex.popov@linux.com> Signed-off-by:
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- 12 Mar, 2017 33 commits
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Greg Kroah-Hartman authored
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Florian Westphal authored
commit e5072053 upstream. This further refines the changes made to conntrack gc_worker in commit e0df8cae ("netfilter: conntrack: refine gc worker heuristics"). The main idea of that change was to reduce the scan interval when evictions take place. However, on the reporters' setup, there are 1-2 million conntrack entries in total and roughly 8k new (and closing) connections per second. In this case we'll always evict at least one entry per gc cycle and scan interval is always at 1 jiffy because of this test: } else if (expired_count) { gc_work->next_gc_run /= 2U; next_run = msecs_to_jiffies(1); being true almost all the time. Given we scan ~10k entries per run its clearly wrong to reduce interval based on nonzero eviction count, it will only waste cpu cycles since a vast majorities of conntracks are not timed out. Thus only look at the ratio (scanned entries vs. evicted entries) to make a decision on whether to reduce or not. Because evictor is supposed to only kick in when system turns idle after a busy period, pick a high ratio -- this makes it 50%. We thus keep the idea of increasing scan rate when its likely that table contains many expired entries. In order to not let timed-out entries hang around for too long (important when using event logging, in which case we want to timely destroy events), we now scan the full table within at most GC_MAX_SCAN_JIFFIES (16 seconds) even in worst-case scenario where all timed-out entries sit in same slot. I tested this with a vm under synflood (with sysctl net.netfilter.nf_conntrack_tcp_timeout_syn_recv=3). While flood is ongoing, interval now stays at its max rate (GC_MAX_SCAN_JIFFIES / GC_MAX_BUCKETS_DIV -> 125ms). With feedback from Nicolas Dichtel. Reported-by:
Denys Fedoryshchenko <nuclearcat@nuclearcat.com> Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com> Fixes: b87a2f91 ("netfilter: conntrack: add gc worker to remove timed-out entries") Signed-off-by:
Florian Westphal <fw@strlen.de> Tested-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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Florian Westphal authored
commit 524b698d upstream. Instead of breaking loop and instant resched, don't bother checking this in first place (the loop calls cond_resched for every bucket anyway). Suggested-by:
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Yan, Zheng authored
commit d641df81 upstream. add_to_page_cache_lru() can fails, so the actual pages to read can be smaller than the initial size of osd request. We need to update osd request size in that case. Signed-off-by:
Yan, Zheng <zyan@redhat.com> Reviewed-by:
Jeff Layton <jlayton@redhat.com> Signed-off-by:
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James Smart authored
commit 8ea73db4 upstream. Correct WQ creation for pagesize The driver was calculating the adapter command pagesize indicator from the system pagesize. However, the buffers the driver allocates are only one size (SLI4_PAGE_SIZE), so no calculation was necessary. Signed-off-by:
Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by:
James Smart <james.smart@broadcom.com> Reviewed-by:
Hannes Reinecke <hare@suse.com> Reviewed-by:
Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Cc: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> Signed-off-by:
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Ralf Baechle authored
commit ae2f5e5e upstream. Fix the following build error with binutils 2.25. CC arch/mips/mm/sc-ip22.o {standard input}: Assembler messages: {standard input}:132: Error: number (0x9000000080000000) larger than 32 bits {standard input}:159: Error: number (0x9000000080000000) larger than 32 bits {standard input}:200: Error: number (0x9000000080000000) larger than 32 bits scripts/Makefile.build:293: recipe for target 'arch/mips/mm/sc-ip22.o' failed make[1]: *** [arch/mips/mm/sc-ip22.o] Error 1 MIPS has used .set mips3 to temporarily switch the assembler to 64 bit mode in 64 bit kernels virtually forever. Binutils 2.25 broke this behavious partially by happily accepting 64 bit instructions in .set mips3 mode but puking on 64 bit constants when generating 32 bit ELF. Binutils 2.26 restored the old behaviour again. Fix build with binutils 2.25 by open coding the offending dli $1, 0x9000000080000000 as li $1, 0x9000 dsll $1, $1, 48 which is ugly be the only thing that will build on all binutils vintages. Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Cc: stable@vger.kernel.org Signed-off-by:
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Ralf Baechle authored
commit f9f1c8db upstream. Signed-off-by:
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Aneesh Kumar K.V authored
commit fda2d27d upstream. We will set LPCR with correct value for radix during int. This make sure we start with a sanitized value of LPCR. In case of kexec, cpus can have LPCR value based on the previous translation mode we were running. Fixes: fe036a06 ("powerpc/64/kexec: Fix MMU cleanup on radix") Acked-by:
Michael Neuling <mikey@neuling.org> Signed-off-by:
Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Aneesh Kumar K.V authored
commit a5ecdad4 upstream. Without this we will always find the feature disabled. Fixes: 984d7a1e ("powerpc/mm: Fixup kernel read only mapping") Signed-off-by:
Balbir Singh <bsingharora@gmail.com> Signed-off-by:
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Ravi Bangoria authored
commit c21a493a upstream. Currently xmon data-breakpoint feature is broken. Whenever there is a watchpoint match occurs, hw_breakpoint_handler will be called by do_break via notifier chains mechanism. If watchpoint is registered by xmon, hw_breakpoint_handler won't find any associated perf_event and returns immediately with NOTIFY_STOP. Similarly, do_break also returns without notifying to xmon. Solve this by returning NOTIFY_DONE when hw_breakpoint_handler does not find any perf_event associated with matched watchpoint, rather than NOTIFY_STOP, which tells the core code to continue calling the other breakpoint handlers including the xmon one. Signed-off-by:
Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Signed-off-by:
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Chuck Lever authored
commit 16f906d6 upstream. The MAX_SEND_SGES check introduced in commit 655fec69 ("xprtrdma: Use gathered Send for large inline messages") fails for devices that have a small max_sge. Instead of checking for a large fixed maximum number of SGEs, check for a minimum small number. RPC-over-RDMA will switch to using a Read chunk if an xdr_buf has more pages than can fit in the device's max_sge limit. This is considerably better than failing all together to mount the server. This fix supports devices that have as few as three send SGEs available. Reported-by:
Selvin Xavier <selvin.xavier@broadcom.com> Reported-by:
Devesh Sharma <devesh.sharma@broadcom.com> Reported-by:
Honggang Li <honli@redhat.com> Reported-by:
Ram Amrani <Ram.Amrani@cavium.com> Fixes: 655fec69 ("xprtrdma: Use gathered Send for large ...") Tested-by:
Steve Wise <swise@opengridcomputing.com> Reviewed-by:
Parav Pandit <parav@mellanox.com> Signed-off-by:
Chuck Lever <chuck.lever@oracle.com> Signed-off-by:
Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by:
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Chuck Lever authored
commit c95a3c6b upstream. Commit d5440e27 ("xprtrdma: Enable pad optimization") made the Linux client omit XDR round-up padding in normal Read and Write chunks so that the client doesn't have to register and invalidate 3-byte memory regions that contain no real data. Unfortunately, my cheery 2014 assessment that this optimization "is supported now by both Linux and Solaris servers" was premature. We've found bugs in Solaris in this area since commit d5440e27 ("xprtrdma: Enable pad optimization") was merged (SYMLINK is the main offender). So for maximum interoperability, I'm disabling this optimization again. If a CM private message is exchanged when connecting, the client recognizes that the server is Linux, and enables the optimization for that connection. Until now the Solaris server bugs did not impact common operations, and were thus largely benign. Soon, less capable devices on Linux NFS/RDMA clients will make use of Read chunks more often, and these Solaris bugs will prevent interoperation in more cases. Fixes: 677eb17e ("xprtrdma: Fix XDR tail buffer marshalling") Signed-off-by:
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Chuck Lever authored
commit b5f0afbe upstream. Pad optimization is changed by echoing into /proc/sys/sunrpc/rdma_pad_optimize. This is a global setting, affecting all RPC-over-RDMA connections to all servers. The marshaling code picks up that value and uses it for decisions about how to construct each RPC-over-RDMA frame. Having it change suddenly in mid-operation can result in unexpected failures. And some servers a client mounts might need chunk round-up, while others don't. So instead, copy the pad_optimize setting into each connection's rpcrdma_ia when the transport is created, and use the copy, which can't change during the life of the connection, instead. This also removes a hack: rpcrdma_convert_iovs was using the remote-invalidation-expected flag to predict when it could leave out Write chunk padding. This is because the Linux server handles implicit XDR padding on Write chunks correctly, and only Linux servers can set the connection's remote-invalidation-expected flag. It's more sensible to use the pad optimization setting instead. Fixes: 677eb17e ("xprtrdma: Fix XDR tail buffer marshalling") Signed-off-by:
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Chuck Lever authored
commit 24abdf1b upstream. When pad optimization is disabled, rpcrdma_convert_iovs still does not add explicit XDR round-up padding to a Read chunk. Commit 677eb17e ("xprtrdma: Fix XDR tail buffer marshalling") incorrectly short-circuited the test for whether round-up padding is needed that appears later in rpcrdma_convert_iovs. However, if this is indeed a regular Read chunk (and not a Position-Zero Read chunk), the tail iovec _always_ contains the chunk's padding, and never anything else. So, it's easy to just skip the tail when padding optimization is enabled, and add the tail in a subsequent Read chunk segment, if disabled. Fixes: 677eb17e ("xprtrdma: Fix XDR tail buffer marshalling") Signed-off-by:
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Magnus Lilja authored
commit adee40b2 upstream. Commit 3d8cc000 ("dmaengine: ipu: Consolidate duplicated irq handlers") consolidated the two interrupts routines into one, but the remaining interrupt routine only checks the status of the error interrupts, not the normal interrupts. This patch fixes that problem (tested on i.MX31 PDK board). Fixes: 3d8cc000 ("dmaengine: ipu: Consolidate duplicated irq handlers") Cc: Vinod Koul <vinod.koul@intel.com> Signed-off-by:
Magnus Lilja <lilja.magnus@gmail.com> Signed-off-by:
Vinod Koul <vinod.koul@intel.com> Signed-off-by:
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Mark Marshall authored
commit 65644147 upstream. The commit 7a654172 ("mtd/ifc: Add support for IFC controller version 2.0") added support for version 2.0 of the IFC controller. The version 2.0 controller has the ECC status registers at a different location to the previous versions. Correct the fsl_ifc_nand structure so that the ECC status can be read from the correct location for both version 1.0 and 2.0 of the controller. Fixes: 7a654172 ("mtd/ifc: Add support for IFC controller version 2.0") Signed-off-by:
Mark Marshall <mark.marshall@omicronenergy.com> Signed-off-by:
Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by:
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Rafał Miłecki authored
commit a971df0b upstream. This allows tracking device state and e.g. makes devm work as expected. Signed-off-by:
Rafał Miłecki <rafal@milecki.pl> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org> Signed-off-by:
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colyli@suse.de authored
commit 03a9e24e upstream. Recently I receive a bug report that on Linux v3.0 based kerenl, hot add disk to a md linear device causes kernel crash at linear_congested(). From the crash image analysis, I find in linear_congested(), mddev->raid_disks contains value N, but conf->disks[] only has N-1 pointers available. Then a NULL pointer deference crashes the kernel. There is a race between linear_add() and linear_congested(), RCU stuffs used in these two functions cannot avoid the race. Since Linuv v4.0 RCU code is replaced by introducing mddev_suspend(). After checking the upstream code, it seems linear_congested() is not called in generic_make_request() code patch, so mddev_suspend() cannot provent it from being called. The possible race still exists. Here I explain how the race still exists in current code. For a machine has many CPUs, on one CPU, linear_add() is called to add a hard disk to a md linear device; at the same time on other CPU, linear_congested() is called to detect whether this md linear device is congested before issuing an I/O request onto it. Now I use a possible code execution time sequence to demo how the possible race happens, seq linear_add() linear_congested() 0 conf=mddev->private 1 oldconf=mddev->private 2 mddev->raid_disks++ 3 for (i=0; i<mddev->raid_disks;i++) 4 bdev_get_queue(conf->disks[i].rdev->bdev) 5 mddev->private=newconf In linear_add() mddev->raid_disks is increased in time seq 2, and on another CPU in linear_congested() the for-loop iterates conf->disks[i] by the increased mddev->raid_disks in time seq 3,4. But conf with one more element (which is a pointer to struct dev_info type) to conf->disks[] is not updated yet, accessing its structure member in time seq 4 will cause a NULL pointer deference fault. To fix this race, there are 2 parts of modification in the patch, 1) Add 'int raid_disks' in struct linear_conf, as a copy of mddev->raid_disks. It is initialized in linear_conf(), always being consistent with pointers number of 'struct dev_info disks[]'. When iterating conf->disks[] in linear_congested(), use conf->raid_disks to replace mddev->raid_disks in the for-loop, then NULL pointer deference will not happen again. 2) RCU stuffs are back again, and use kfree_rcu() in linear_add() to free oldconf memory. Because oldconf may be referenced as mddev->private in linear_congested(), kfree_rcu() makes sure that its memory will not be released until no one uses it any more. Also some code comments are added in this patch, to make this modification to be easier understandable. This patch can be applied for kernels since v4.0 after commit: 3be260cc ("md/linear: remove rcu protections in favour of suspend/resume"). But this bug is reported on Linux v3.0 based kernel, for people who maintain kernels before Linux v4.0, they need to do some back back port to this patch. Changelog: - V3: add 'int raid_disks' in struct linear_conf, and use kfree_rcu() to replace rcu_call() in linear_add(). - v2: add RCU stuffs by suggestion from Shaohua and Neil. - v1: initial effort. Signed-off-by:
Coly Li <colyli@suse.de> Cc: Shaohua Li <shli@fb.com> Cc: Neil Brown <neilb@suse.com> Signed-off-by:
Shaohua Li <shli@fb.com> Signed-off-by:
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Maxime Ripard authored
commit fb61bb82 upstream. The RTC is clocked from either an internal, imprecise, oscillator or an external one, which is usually much more accurate. The difference perceived between the time elapsed and the time reported by the RTC is in a 10% scale, which prevents the RTC from being useful at all. Fortunately, the external oscillator is reported to be mandatory in the Allwinner datasheet, so we can just switch to it. Fixes: 9765d2d9 ("rtc: sun6i: Add sun6i RTC driver") Signed-off-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by:
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Maxime Ripard authored
commit a9422a19 upstream. Some registers have a read-modify-write access pattern that are not atomic. Add some locking to prevent from concurrent accesses. Acked-by:
Chen-Yu Tsai <wens@csie.org> Signed-off-by:
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Maxime Ripard authored
commit 37539414 upstream. Since we have to provide the clock very early on, the RTC driver cannot be built as a module. Make sure that won't happen. Signed-off-by:
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Jaegeuk Kim authored
commit 8b107f5b upstream. If segs_per_sec is over 1 like under SMR, previously f2fs issues discard commands redundantly on the same section, since we didn't move end position for the previous discard command. E.g., start end | | prefree_bitmap = [01111100111100] And, after issue discard for this section, end start | | prefree_bitmap = [01111100111100] Select this section again by searching from (end + 1), start end | | prefree_bitmap = [01111100111100] Fixes: 36abef4e ("f2fs: introduce mode=lfs mount option") Cc: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by:
Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by:
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Hou Pengyang authored
commit e93b9865 upstream. For foreground gc, greedy algorithm should be adapted, which makes this formula work well: (2 * (100 / config.overprovision + 1) + 6) But currently, we fg_gc have a prior to select bg_gc victim segments to gc first, these victims are selected by cost-benefit algorithm, we can't guarantee such segments have the small valid blocks, which may destroy the f2fs rule, on the worstest case, would consume all the free segments. This patch fix this by add a filter in check_bg_victims, if segment's has # of valid blocks over overprovision ratio, skip such segments. Signed-off-by:
Hou Pengyang <houpengyang@huawei.com> Reviewed-by:
Chao Yu <yuchao0@huawei.com> Signed-off-by:
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Jaegeuk Kim authored
commit 88c5c13a upstream. It turns out a stakable filesystem like sdcardfs in AOSP can trigger multiple vfs_create() to lower filesystem. In that case, f2fs will add multiple dentries having same name which breaks filesystem consistency. Until upper layer fixes, let's work around by f2fs, which shows actually not much performance regression. Signed-off-by:
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Yunlei He authored
commit 7855eba4 upstream. This patch fix a problem of using memory after free in function __try_merge_extent_node. Fixes: 0f825ee6 ("f2fs: add new interfaces for extent tree") Signed-off-by:
Yunlei He <heyunlei@huawei.com> Reviewed-by:
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Weston Andros Adamson authored
commit ed92d8c1 upstream. We're not taking into account that the space needed for the (variable length) attr bitmap, with the result that we'd sometimes get a spurious ERANGE when the ACL data got close to the end of a page. Just add in an extra page to make sure. Signed-off-by:
Weston Andros Adamson <dros@primarydata.com> Signed-off-by:
J. Bruce Fields <bfields@redhat.com> Signed-off-by:
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J. Bruce Fields authored
commit 6682c14b upstream. Bitmap and attrlen follow immediately after the op reply header. This was an oversight from commit bf118a34. Consequences of this are just minor efficiency (extra calls to xdr_shrink_bufhead). Fixes: bf118a34 "NFSv4: include bitmap in nfsv4 get acl data" Reviewed-by:
Kinglong Mee <kinglongmee@gmail.com> Signed-off-by:
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Trond Myklebust authored
commit df3ab232 upstream. If we see that our pNFS READ/WRITE/COMMIT operation failed, but we also see that our layout segment is no longer valid, then we need to get a new layout segment before retrying. Fixes: 90816d1d ("NFSv4.1/flexfiles: Don't mark the entire deviceid...") Signed-off-by:
Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by:
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Trond Myklebust authored
commit 9d8cacbf upstream. Copy offload code needs to be hooked into the code for handling NFS4ERR_BAD_STATEID by ensuring that we set the "stateid" field in struct nfs4_exception. Reported-by:
Olga Kornievskaia <aglo@umich.edu> Fixes: 2e72448b ("NFS: Add COPY nfs operation") Signed-off-by:
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Trond Myklebust authored
commit a974deee upstream. If we exit because the file access check failed, we currently leak the struct nfs4_state. We need to attach it to the open context before returning. Fixes: 3efb9722 ("NFSv4: Refactor _nfs4_open_and_get_state..") Signed-off-by:
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Christoph Hellwig authored
commit 783112f7 upstream. Both the NFS protocols and the Linux VFS use a setattr operation with a bitmap of attributes to set to set various file attributes including the file size and the uid/gid. The Linux syscalls never mix size updates with unrelated updates like the uid/gid, and some file systems like XFS and GFS2 rely on the fact that truncates don't update random other attributes, and many other file systems handle the case but do not update the other attributes in the same transaction. NFSD on the other hand passes the attributes it gets on the wire more or less directly through to the VFS, leading to updates the file systems don't expect. XFS at least has an assert on the allowed attributes, which caught an unusual NFS client setting the size and group at the same time. To handle this issue properly this splits the notify_change call in nfsd_setattr into two separate ones. Signed-off-by:
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Christoph Hellwig authored
commit 758e99fe upstream. Simplify exit paths, size_change use. Signed-off-by:
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Stefano Babic authored
commit 9797484b upstream. Commit 050c3d52 ("vme: make core vme support explicitly non-modular") dropped the remove function because it appeared as if it was for removal of the bus, which is not supported. However, vme_bus_remove() is called when a VME device is removed from the bus and not when the bus is removed; as it calls the VME device driver's cleanup function. Without this function, the remove() in the VME device driver is never called and VME device drivers cannot be reloaded again. Here we restore the remove function that was deleted in that commit, and the reference to the function in the bus structure. Fixes: 050c3d52 ("vme: make core vme support explicitly non-modular") Cc: Manohar Vanga <manohar.vanga@gmail.com> Acked-by:
Martyn Welch <martyn@welchs.me.uk> Cc: devel@driverdev.osuosl.org Signed-off-by:
Stefano Babic <sbabic@denx.de> Signed-off-by:
Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by:
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