- 18 4月, 2017 1 次提交
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由 Marc Olson 提交于
When a blkfront device is resized from dom0, emit a KOBJ_CHANGE uevent to notify the guest about the change. This allows for custom udev rules, such as automatically resizing a filesystem, when an event occurs. With this patch you get these udev KERNEL[577.206230] change /devices/vbd-51728/block/xvdb (block) UDEV [577.226218] change /devices/vbd-51728/block/xvdb (block) Signed-off-by: NMarc Olson <marcolso@amazon.com> Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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- 17 4月, 2017 30 次提交
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由 Josef Bacik 提交于
For ease of management it would be nice for users to specify that the device node for a nbd device is destroyed once it is disconnected and there are no more users. Add a client flag and enable this operation to happen. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
In order to support deleting the device on disconnect we need to refcount the actual nbd_device struct. So add the refcounting framework and change how we free the normal devices at rmmod time so we can catch reference leaks. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
Allow users to query the status of existing nbd devices. Right now this only returns whether or not the device is connected, but could be extended in the future to include more information. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
Sometimes we like to upgrade our server without making all of our clients freak out and reconnect. This patch provides a way to specify a dead connection timeout to allow us to pause all requests and wait for new connections to be opened. With this in place I can take down the nbd server for less than the dead connection timeout time and bring it back up and everything resumes gracefully. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
When running a disconnect torture test I noticed that sometimes we would crash with a negative ref count on our queue. This was because we were ending the same request twice. Turns out we were racing with NBD_CLEAR_SOCK clearing the requests as well as the teardown of the device clearing the requests. So instead make the ioctl only shutdown the sockets and make it so that we only ever run nbd_clear_que from the device teardown. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
Provide a mechanism to notify userspace that there's been a link problem on a NBD device. This will allow userspace to re-establish a connection and provide the new socket to the device without disrupting the device. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
We want to be able to reconnect dead connections to existing block devices, so add a reconfigure netlink command. We will also allow users to change their timeout on the fly, but everything else will require a disconnect and reconnect. You won't be able to add more connections either, simply replace dead connections with new more lively connections. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
The existing ioctl interface for configuring NBD devices is a bit cumbersome and hard to extend. The other problem is we leave a userspace app sitting in it's syscall until the device disconnects, which is less than ideal. This patch introduces a netlink interface for adding and disconnecting nbd devices. This has the benefits of being easily extendable without breaking older userspace applications, and allows us to configure a nbd device without leaving a userspace app sitting waiting for the device to disconnect. With this interface we also gain the ability to configure more devices than are preallocated at insmod time. We also have gained the ability to not specify a particular device and be provided one for us so that userspace doesn't need to find a free device to configure. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
In preparation for the upcoming netlink interface we need to not rely on already having the bdev for the NBD device we are doing operations on. Instead of passing the bdev around, just use it in places where we know we already have the bdev. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
In order to properly refcount the various aspects of a NBD device we need to separate out the configuration elements of the nbd device. The configuration of a NBD device has a different lifetime from the actual device, so it doesn't make sense to bundle these two concepts. Add a config_refs to keep track of the configuration structure, that way we can be sure that we never access it when we've torn down the device. Add a new nbd_config structure to hold all of the transient configuration information. Finally create this when we open the device so that it is in place when we start to configure the device. This has a nice side-effect of fixing a long standing problem where you could end up with a half-configured nbd device that needed to be "disconnected" in order to be usable again. Now once we close our device the configuration will be discarded. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
Currently if we have multiple connections and one of them goes down we will tear down the whole device. However there's no reason we need to do this as we could have other connections that are working fine. Deal with this by keeping track of the state of the different connections, and if we lose one we mark it as dead and send all IO destined for that socket to one of the other healthy sockets. Any outstanding requests that were on the dead socket will timeout and be re-submitted properly. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
When adding a new socket we look it up and then try to add it to our configuration. If any of those steps fail we need to make sure we put the socket so we don't leak them. Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Dan Carpenter 提交于
There were a bunch of places in pblk_lines_init() where we didn't set an error code. And in pblk_writer_init() we accidentally return 1 instead of a correct error code, which would result in a Oops later. Fixes: 11a5d6fdf919 ("lightnvm: physical block device (pblk) target") Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Dan Carpenter 提交于
WARN_ON() takes a condition, not an error message. I slightly tweaked some conditions so hopefully it's more clear. Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Dan Carpenter 提交于
These labels are reversed so we could end up dereferencing an error pointer or leaking. Fixes: 7f347ba6bb3a ("lightnvm: physical block device (pblk) target") Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Javier González 提交于
This patch introduces pblk, a host-side translation layer for Open-Channel SSDs to expose them like block devices. The translation layer allows data placement decisions, and I/O scheduling to be managed by the host, enabling users to optimize the SSD for their specific workloads. An open-channel SSD has a set of LUNs (parallel units) and a collection of blocks. Each block can be read in any order, but writes must be sequential. Writes may also fail, and if a block requires it, must also be reset before new writes can be applied. To manage the constraints, pblk maintains a logical to physical address (L2P) table, write cache, garbage collection logic, recovery scheme, and logic to rate-limit user I/Os versus garbage collection I/Os. The L2P table is fully-associative and manages sectors at a 4KB granularity. Pblk stores the L2P table in two places, in the out-of-band area of the media and on the last page of a line. In the cause of a power failure, pblk will perform a scan to recover the L2P table. The user data is organized into lines. A line is data striped across blocks and LUNs. The lines enable the host to reduce the amount of metadata to maintain besides the user data and makes it easier to implement RAID or erasure coding in the future. pblk implements multi-tenant support and can be instantiated multiple times on the same drive. Each instance owns a portion of the SSD - both regarding I/O bandwidth and capacity - providing I/O isolation for each case. Finally, pblk also exposes a sysfs interface that allows user-space to peek into the internals of pblk. The interface is available at /dev/block/*/pblk/ where * is the block device name exposed. This work also contains contributions from: Matias Bjørling <matias@cnexlabs.com> Simon A. F. Lund <slund@cnexlabs.com> Young Tack Jin <youngtack.jin@gmail.com> Huaicheng Li <huaicheng@cs.uchicago.edu> Signed-off-by: NJavier González <javier@cnexlabs.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Javier González 提交于
Convert sprintf calls to strlcpy in order to make possible buffer overflow more obvious. Signed-off-by: NJavier González <javier@cnexlabs.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Javier González 提交于
sector_t is always unsigned, therefore avoid < 0 checks on it. Signed-off-by: NJavier González <javier@cnexlabs.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Javier González 提交于
Clean unused variable on lightnvm core. Signed-off-by: NJavier González <javier@cnexlabs.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Javier González 提交于
Prefix the nvm_free static function with a missing static keyword. Signed-off-by: NJavier González <javier@cnexlabs.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Javier González 提交于
Target initialization has two responsibilities: creating the target partition and instantiating the target. This patch enables to create a factory partition (e.g., do not trigger recovery on the given target). This is useful for target development and for being able to restore the device state at any moment in time without requiring a full-device erase. Signed-off-by: NJavier González <javier@cnexlabs.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Javier González 提交于
The NVMe I/O command control bits are 16 bytes, but is interpreted as 32 bytes in the lightnvm user I/O data path. Signed-off-by: NJavier González <javier@cnexlabs.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Javier González 提交于
Reorder disk allocation such that the disk structure can be put safely. Signed-off-by: NJavier González <javier@cnexlabs.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Javier González 提交于
The dev->lun_map bits are cleared twice if an target init error occurs. First in the target clean routine, and then next in the nvm_tgt_create error function. Make sure that it is only cleared once by extending nvm_remove_tgt_devi() with a clear bit, such that clearing of bits can ignored when cleaning up a successful initialized target. Signed-off-by: NJavier González <javier@cnexlabs.com> Fix style. Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 NeilBrown 提交于
mempool_alloc() cannot fail if the gfp flags allow it to sleep, and both GFP_KERNEL and GFP_NOIO allows for sleeping. So rrpc_move_valid_pages() and rrpc_make_rq() don't need to test the return value. Signed-off-by: NNeilBrown <neilb@suse.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Matias Bjørling 提交于
The asserts in _nvme_nvm_check_size are not compiled due to the function not begin called. Make sure that it is called, and also fix the wrong sizes of asserts for nvme_nvm_addr_format, and nvme_nvm_bb_tbl, which checked for number of bits instead of bytes. Reported-by: NScott Bauer <scott.bauer@intel.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Javier González 提交于
Free the reverse mapping table correctly on target tear down Signed-off-by: NJavier González <javier@cnexlabs.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Javier González 提交于
Until now erases have been submitted as synchronous commands through a dedicated erase function. In order to enable targets implementing asynchronous erases, refactor the erase path so that it uses the normal async I/O submission functions. If a target requires sync I/O, it can implement it internally. Also, adapt rrpc to use the new erase path. Signed-off-by: NJavier González <javier@cnexlabs.com> Fixed spelling error. Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Scott Bauer 提交于
There are two closely named structs in lightnvm: struct nvme_nvm_addr_format and struct nvme_addr_format. The first struct has 4 reserved bytes at the end, the second does not. (gdb) p sizeof(struct nvme_nvm_addr_format) $1 = 16 (gdb) p sizeof(struct nvm_addr_format) $2 = 12 In the nvme_nvm_identify function we memcpy from the larger struct to the smaller struct. We incorrectly pass the length of the larger struct and overflow by 4 bytes, lets not do that. Signed-off-by: NScott Bauer <scott.bauer@intel.com> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christophe JAILLET 提交于
According to error handling in this function, it is likely that going to 'out' was expected here. Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: NMatias Bjørling <matias@cnexlabs.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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- 15 4月, 2017 1 次提交
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由 Christoph Hellwig 提交于
This drivers was added in 2008, but as far as a I can tell we never had a single platform that actually registered resources for the platform driver. It's also been unmaintained for a long time and apparently has a ATA mode that can be driven using the IDE/libata subsystem. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NHannes Reinecke <hare@suse.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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- 09 4月, 2017 8 次提交
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由 Martin K. Petersen 提交于
Separating discards and zeroout operations allows us to remove the LBPRZ block zeroing constraints from discards and honor the device preferences for UNMAP commands. If supported by the device, we'll also choose UNMAP over one of the WRITE SAME variants for discards. Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com> Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NHannes Reinecke <hare@suse.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Martin K. Petersen 提交于
Now that zeroout and discards are distinct operations we need to separate the policy of choosing the appropriate command. Create a zeroing_mode which can be one of: write: Zeroout assist not present, use regular WRITE writesame: Allow WRITE SAME(10/16) with a zeroed payload writesame_16_unmap: Allow WRITE SAME(16) with UNMAP writesame_10_unmap: Allow WRITE SAME(10) with UNMAP The last two are conditional on the device being thin provisioned with LBPRZ=1 and LBPWS=1 or LBPWS10=1 respectively. Whether to set the UNMAP bit or not depends on the REQ_NOUNMAP flag. And if none of the _unmap variants are supported, regular WRITE SAME will be used if the device supports it. The zeroout_mode is exported in sysfs and the detected mode for a given device can be overridden using the string constants above. With this change in place we can now issue WRITE SAME(16) with UNMAP set for block zeroing applications that require hard guarantees and logical_block_size granularity. And at the same time use the UNMAP command with the device's preferred granulary and alignment for discard operations. Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com> Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NHannes Reinecke <hare@suse.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
Now that we use the proper REQ_OP_WRITE_ZEROES operation everywhere we can kill this hack. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NMartin K. Petersen <martin.petersen@oracle.com> Reviewed-by: NHannes Reinecke <hare@suse.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
It seems like DRBD assumes its on the wire TRIM request always zeroes data. Use that fact to implement REQ_OP_WRITE_ZEROES. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NHannes Reinecke <hare@suse.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
drbd always wants its discard wire operations to zero the blocks, so use blkdev_issue_zeroout with the BLKDEV_ZERO_UNMAP flag instead of reinventing it poorly. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NHannes Reinecke <hare@suse.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
mmc only supports discarding on large alignments, so the zeroing code would always fall back to explicit writings of zeroes. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NHannes Reinecke <hare@suse.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
rsxx only supports discarding on large alignments, so the zeroing code would always fall back to explicit writings of zeroes. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NHannes Reinecke <hare@suse.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
rbd only supports discarding on large alignments, so the zeroing code would always fall back to explicit writings of zeroes. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NHannes Reinecke <hare@suse.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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