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path: root/drivers/lightnvm/core.c (follow)
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2019-09-05lightnvm: print error when target is not foundMinwoo Im1-1/+4
If userspace requests target to be removed, nvm_remove_tgt() will iterate the nvm_devices to find out the given target, but if not found, then it should print out an error. Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com> Updated output string and patch description. Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-09-05lightnvm: introduce pr_fmt for the prefix nvmMinwoo Im1-24/+25
all the pr_() family can have this prefix by pr_fmt. Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com> Reviewed-by: Javier González <javier@javigon.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-08-06lightnvm: move metadata mapping to lower level driverHans Holmberg1-7/+9
Now that blk_rq_map_kern can map both kmem and vmem, move internal metadata mapping down to the lower level driver. Reviewed-by: Javier González <javier@javigon.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Hans Holmberg <hans@owltronix.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-08-06lightnvm: remove nvm_submit_io_sync_fnHans Holmberg1-6/+29
Move the redundant sync handling interface and wait for a completion in the lightnvm core instead. Reviewed-by: Javier González <javier@javigon.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Hans Holmberg <hans@owltronix.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-06-21lightnvm: fix uninitialized pointer in nvm_remove_tgt()Geert Uytterhoeven1-1/+1
With gcc 4.1: drivers/lightnvm/core.c: In function ‘nvm_remove_tgt’: drivers/lightnvm/core.c:510: warning: ‘t’ is used uninitialized in this function Indeed, if no NVM devices have been registered, t will be an uninitialized pointer, and may be dereferenced later. A call to nvm_remove_tgt() can be triggered from userspace by issuing the NVM_DEV_REMOVE ioctl on the lightnvm control device. Fix this by preinitializing t to NULL. Fixes: 843f2edbdde085b4 ("lightnvm: do not remove instance under global lock") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 410Thomas Gleixner1-15/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program see the file copying if not write to the free software foundation 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 3 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531190112.675111872@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-06lightnvm: do not remove instance under global lockIgor Konopko1-18/+16
Currently all the target instances are removed under global nvm_lock. This was needed to ensure that nvm_dev struct will not be freed by hot unplug event during target removal. However, current implementation has some drawbacks, since the same lock is used when new nvme subsystem is registered, so we can have a situation, that due to long process of target removal on drive A, registration (and listing in OS) of the drive B will take a lot of time, since it will wait for that lock. Now when we have kref which ensures that nvm_dev will not be freed in the meantime, we can easily get rid of this lock for a time when we are removing nvm targets. Signed-off-by: Igor Konopko <igor.j.konopko@intel.com> Reviewed-by: Javier González <javier@javigon.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-06lightnvm: track inflight target creationsIgor Konopko1-10/+31
When creation process is still in progress, target is not yet on targets list. This causes a chance for removing whole lightnvm subsystem by calling nvm_unregister() in the meantime and finally by causing kernel panic inside target init function. This patch changes the behaviour by adding kref variable which tracks all the users of nvm_dev structure. When nvm_dev is allocated, kref value is set to 1. Then before every target creation the value is increased and decreased after target removal. The extra reference is decreased when nvm subsystem is unregistered. Signed-off-by: Igor Konopko <igor.j.konopko@intel.com> Reviewed-by: Javier González <javier@javigon.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-06lightnvm: prevent race condition on pblk removeMarcin Dziegielewski1-0/+2
When we trigger nvm target remove during device hot unplug, there is a probability to hit a general protection fault. This is caused by use of nvm_dev thay may be freed from another (hot unplug) thread (in the nvm_unregister function). Introduce lock in nvme_ioctl_dev_remove function to prevent this situation. Signed-off-by: Marcin Dziegielewski <marcin.dziegielewski@intel.com> Reviewed-by: Javier González <javier@javigon.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-06lightnvm: Inherit mdts from the parent nvme deviceIgor Konopko1-2/+7
Current lightnvm and pblk implementation does not care about NVMe max data transfer size, which can be smaller than 64*K=256K. There are existing NVMe controllers which NVMe max data transfer size is lower that 256K (for example 128K, which happens for existing NVMe controllers which are NVMe spec compliant). Such a controllers are not able to handle command which contains 64 PPAs, since the the size of DMAed buffer will be above the capabilities of such a controller. Signed-off-by: Igor Konopko <igor.j.konopko@intel.com> Reviewed-by: Hans Holmberg <hans.holmberg@cnexlabs.com> Reviewed-by: Javier González <javier@javigon.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-12-11lightnvm: dynamic DMA pool entry sizeIgor Konopko1-2/+7
Currently lightnvm and pblk uses single DMA pool, for which the entry size always is equal to PAGE_SIZE. The contents of each entry allocated from the DMA pool consists of a PPA list (8bytes * 64), leaving 56bytes * 64 space for metadata. Since the metadata field can be bigger, such as 128 bytes, the static size does not cover this use-case. This patch adds support for I/O metadata above 56 bytes by changing DMA pool size based on device meta size and allows pblk to use OOB metadata >=16B. Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Igor Konopko <igor.j.konopko@intel.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-12-11lightnvm: simplify geometry enumerationMatias Bjørling1-7/+5
Currently the geometry of an OCSSD is enumerated using a two step approach: First, nvm_register is called, the OCSSD identify command is issued, and second the geometry sos and csecs values are read either from the OCSSD identify if it is a 1.2 drive, or from the NVMe namespace data structure if it is a 2.0 device. This patch recombines it into a single step, such that nvm_register can use the csecs and sos fields independent of which version is used. This enables one to dynamically size the lightnvm subsystem dma pool. Reviewed-by: Igor Konopko <igor.j.konopko@intel.com> Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-12-11lightnvm: Fix uninitialized return value in nvm_get_chunk_meta()Geert Uytterhoeven1-1/+1
With gcc 4.1: drivers/lightnvm/core.c: In function ‘nvm_get_bb_meta’: drivers/lightnvm/core.c:977: warning: ‘ret’ may be used uninitialized in this function and drivers/nvme/host/lightnvm.c: In function ‘nvme_nvm_get_chk_meta’: drivers/nvme/host/lightnvm.c:580: warning: ‘ret’ may be used uninitialized in this function Indeed, if (for the former) the number of channels or LUNs is zero, or (for both) the passed number of chunks is zero, ret will be returned uninitialized. Fix this by preinitializing ret to zero. Fixes: aff3fb18f957de93 ("lightnvm: move bad block and chunk state logic to core") Fixes: a294c199455187d1 ("lightnvm: implement get log report chunk helpers") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-11-15block: remove the lock argument to blk_alloc_queue_nodeChristoph Hellwig1-1/+1
With the legacy request path gone there is no real need to override the queue_lock. Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-10-09lightnvm: introduce nvm_rq_to_ppa_listHans Holmberg1-10/+4
There is a number of places in the lightnvm subsystem where the user iterates over the ppa list. Before iterating, the user must know if it is a single or multiple LBAs due to vector commands using either the nvm_rq ->ppa_addr or ->ppa_list fields on command submission, which leads to open-coding the if/else statement. Instead of having multiple if/else's, move it into a function that can be called by its users. A nice side effect of this cleanup is that this patch fixes up a bunch of cases where we don't consider the single-ppa case in pblk. Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-10-09lightnvm: move bad block and chunk state logic to coreMatias Bjørling1-58/+251
pblk implements two data paths for recovery line state. One for 1.2 and another for 2.0, instead of having pblk implement these, combine them in the core to reduce complexity and make available to other targets. The new interface will adhere to the 2.0 chunk definition, including managing open chunks with an active write pointer. To provide this interface, a 1.2 device recovers the state of the chunks by manually detecting if a chunk is either free/open/close/offline, and if open, scanning the flash pages sequentially to find the next writeable page. This process takes on average ~10 seconds on a device with 64 dies, 1024 blocks and 60us read access time. The process can be parallelized but is left out for maintenance simplicity, as the 1.2 specification is deprecated. For 2.0 devices, the logic is maintained internally in the drive and retrieved through the 2.0 interface. Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-10-09lightnvm: move device L2P detection to coreMatias Bjørling1-0/+5
A 1.2 device is able to manage the logical to physical mapping table internally or leave it to the host. A target only supports one of those approaches, and therefore must check on initialization. Move this check to core to avoid each target implement the check. Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-10-09lightnvm: combine 1.2 and 2.0 command flagsMatias Bjørling1-0/+20
Add nvm_set_flags helper to enable core to appropriately set the command flags for read/write/erase depending on which version a drive supports. The flags arguments can be distilled into the access hint, scrambling, and program/erase suspend. Replace the access hint with a "is_seq" parameter. The rest of the flags are dependent on the command opcode, which is trivial to detect and set. Signed-off-by: Matias Bjørling <mb@lightnvm.io> Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-01lightnvm: pass flag on graceful teardown to targetsJavier González1-5/+5
If the namespace is unregistered before the LightNVM target is removed (e.g., on hot unplug) it is too late for the target to store any metadata on the device - any attempt to write to the device will fail. In this case, pass on a "gracefull teardown" flag to the target to let it know when this happens. In the case of pblk, we pad the open line (close all open chunks) to improve data retention. In the event of an ungraceful shutdown, avoid this part and just clean up. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: implement get log report chunk helpersJavier González1-0/+11
The 2.0 spec provides a report chunk log page that can be retrieved using the stangard nvme get log page. This replaces the dedicated get/put bad block table in 1.2. This patch implements the helper functions to allow targets retrieve the chunk metadata using get log page. It makes nvme_get_log_ext available outside of nvme core so that we can use it form lightnvm. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: make address conversions depend on generic deviceJavier González1-2/+2
On address conversions, use the generic device, instead of the target device. This allows to use conversions outside of the target's realm. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: add support for 2.0 address formatJavier González1-10/+10
Add support for 2.0 address format. Also, align address bits for 1.2 and 2.0 to be able to operate on channel and luns without requiring a format conversion. Use a generic address format for this purpose. Also, convert the generic operations to the generic format in pblk. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: normalize geometry nomenclatureJavier González1-45/+44
Normalize nomenclature for naming channels, luns, chunks, planes and sectors as well as derivations in order to improve readability. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: add minor version to generic geometryJavier González1-2/+2
Separate the version between major and minor on the generic geometry and represent it through sysfs in the 2.0 path. The 1.2 path only shows the major version to preserve the existing user space interface. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: simplify geometry structureJavier González1-50/+20
Currently, the device geometry is stored redundantly in the nvm_id and nvm_geo structures at a device level. Moreover, when instantiating targets on a specific number of LUNs, these structures are replicated and manually modified to fit the instance channel and LUN partitioning. Instead, create a generic geometry around nvm_geo, which can be used by (i) the underlying device to describe the geometry of the whole device, and (ii) instances to describe their geometry independently. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: Avoid validation of default op valueHeiner Litz1-4/+2
Fixes: 38401d231de65 ("lightnvm: set target over-provision on create ioctl") Signed-off-by: Heiner Litz <hlitz@ucsc.edu> Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: centralize permission check for lightnvm ioctlJohannes Thumshirn1-18/+3
Currently all functions for handling the lightnvm core ioctl commands do a check for CAP_SYS_ADMIN. Change this to fail early in nvm_ctl_ioctl(), so we don't have to duplicate the permission checks all over. Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29nvme: lightnvm: add late setup of block size and metadataMatias Bjørling1-3/+0
The nvme driver sets up the size of the nvme namespace in two steps. First it initializes the device with standard logical block and metadata sizes, and then sets the correct logical block and metadata size. Due to the OCSSD 2.0 specification relies on the namespace to expose these sizes for correct initialization, let it be updated appropriately on the LightNVM side as well. Signed-off-by: Matias Bjørling <mb@lightnvm.io> Acked-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: remove nvm_dev_ops->max_phys_sectMatias Bjørling1-21/+7
The value of max_phys_sect is always static. Instead of defining it in the nvm_dev_ops structure, declare it as a global value. Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: remove max_rq_sizeMatias Bjørling1-1/+0
The field is no longer used. Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: add 2.0 geometry identificationMatias Bjørling1-5/+3
Implement the geometry data structures for 2.0 and enable a drive to be identified as one, including exposing the appropriate 2.0 sysfs entries. Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-29lightnvm: flatten nvm_id_group into nvm_idMatias Bjørling1-13/+12
There are no groups in the 2.0 specification, make sure that the nvm_id structure is flattened before 2.0 data structures are added. Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-02-28block: Add 'lock' as third argument to blk_alloc_queue_node()Bart Van Assche1-1/+1
This patch does not change any functionality. Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Philipp Reisner <philipp.reisner@linbit.com> Cc: Ulf Hansson <ulf.hansson@linaro.org> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-05lightnvm: set target over-provision on create ioctlJavier González1-23/+83
Allow to set the over-provision percentage on target creation. In case that the value is not provided, fall back to the default value set by the target. In pblk, set the default OP to 11% of the total size of the device Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-05lightnvm: guarantee target unique name across devs.Javier González1-6/+27
Until now, target unique naming is only guaranteed per device. This is ok from a lightnvm perspective, but not from a sysfs one, since groups will collide regardless of the underlying device. Check that names are unique across all lightnvm-capable devices. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-05lightnvm: refactor target type lookupJavier González1-13/+17
Refactor target type lookup to use/not use locks explicitly instead of using a hidden parameter to make the function locking. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-05lightnvm: make geometry structures 2.0 readyMatias Bjørling1-47/+44
Prepare for the 2.0 revision by adapting the geometry structures to coexist with the 1.2 revision. Signed-off-by: Matias Bjørling <m@bjorling.me> Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-05lightnvm: remove lower page tablesMatias Bjørling1-67/+0
The lower page table is unused. All page tables reported by 1.2 devices are all reporting a sequential 1:1 page mapping. This is also not used going forward with the 2.0 revision. Signed-off-by: Matias Bjørling <m@bjorling.me> Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-05lightnvm: remove hybrid ocssd 1.2 supportMatias Bjørling1-141/+0
Now that rrpc have been removed. Also remove the hybrid 1.2 support from the core. Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-10-13Revert "lightnvm: prevent bd removal if busy"Jens Axboe1-14/+0
Christoph correctly points out that this issue is no different for other block devices, and poking at cross layer internals is not the right way to solve it. This reverts commit bb6aa6f08268bbce4e0185b18cab9e04505d6695. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-10-13lightnvm: implement generic path for sync I/OJavier González1-8/+17
Implement a generic path for sending sync I/O on LightNVM. This allows to reuse the standard synchronous path trough blk_execute_rq(), instead of implementing a wait_for_completion on the target side (e.g., pblk). Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-10-13lightnvm: remove stale extern and unused exported symbolsRakesh Pandit1-65/+64
Not all exported symbols are being used outside core and there were some stale entries in lightnvm.h Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-10-13lightnvm: remove unused argument from nvm_set_tgt_bb_tblRakesh Pandit1-17/+12
vblk isn't being used anyway and if we ever have a usecase we can introduce this again. This makes the logic easier and removes unnecessary checks. Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-10-13lightnvm: remove already calculated nr_chnlsRakesh Pandit1-1/+0
Remove repeated calculation for number of channels while creating a target device. Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-10-13lightnvm: protect target type list with correct locksRakesh Pandit1-4/+4
nvm_tgt_types list was protected by wrong lock for NVM_INFO ioctl call and can race with addition or removal of target types. Also unregistering target type was not protected correctly. Fixes: 5cd907853 ("lightnvm: remove nested lock conflict with mm") Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-10-13lightnvm: prevent bd removal if busyRakesh Pandit1-0/+14
When a virtual block device is formatted and mounted after creating with "nvme lnvm create... -t pblk", a removal from "nvm lnvm remove" would result in this: 446416.309757] bdi-block not registered [446416.309773] ------------[ cut here ]------------ [446416.309780] WARNING: CPU: 3 PID: 4319 at fs/fs-writeback.c:2159 __mark_inode_dirty+0x268/0x340 Ideally removal should return -EBUSY as block device is mounted after formatting. This patch tries to address this checking if whole device or any partition of it already mounted or not before removal. Whole device is checked using "bd_super" member of block device. This member is always set once block device has been mounted using a filesystem. Another member "bd_part_count" takes care of checking any if any partitions are under use. "bd_part_count" is only updated under locks when partitions are opened or closed (first open and last release). This at least does take care sending -EBUSY if removal is being attempted while whole block device or any partition is mounted. Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-10-13lightnvm: prevent target type module removal when in useRakesh Pandit1-0/+4
If target type module e.g. pblk here is unloaded (rmmod) while module is in use (after creating target) system crashes. We fix this by using module API refcnt. Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-27lightnvm: if LUNs are already allocated fix returnRakesh Pandit1-2/+3
While creating new device with NVM_DEV_CREATE if LUNs are already allocated ioctl would return -ENOMEM which is wrong. This patch propagates -EBUSY from nvm_reserve_luns which is correct response. Fixes: ade69e243 ("lightnvm: merge gennvm with core") Reviewed-by: Frans Klaver <fransklaver@gmail.com> Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-26lightnvm: re-convert ppa format on I/O failureJavier González1-1/+7
In case of a failure when submitting a request, convert the ppa_list addresses to the target format so that it can interpret ppas for recovery Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-05-04lightnvm: fix bad back free on error pathJavier González1-2/+2
Free memory correctly when an allocation fails on a loop and we free backwards previously successful allocations. Signed-off-by: Javier González <javier@cnexlabs.com> Reviewed-by: Matias Bjørling <matias@cnexlabs.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
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