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* drbd: reduce code duplication when receiving data requestsLars Ellenberg2010-10-143-50/+30
| | | | | | | | also canonicalize the return values of read_for_csum and drbd_rs_begin_io to return -ESOMETHING, or 0 for success. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: use rolling marks for resync speed calculationLars Ellenberg2010-10-145-45/+79
| | | | | | | | | | | | | | | The current resync speed as displayed in /proc/drbd fluctuates a lot. Using an array of rolling marks makes this calculation much more stable. We used to have this (a long time ago with 0.7), but it got lost somehow. If "stalled", do not discard the rest of the information, just add a " (stalled)" tag to the progress line. This patch also shortens a spinlock critical section somewhat, and reduces the number of atomic operations in put_ldev. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: remove outdated comment and dead codeLars Ellenberg2010-10-141-11/+0
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: let drbd_free_ee implicitly free any digestLars Ellenberg2010-10-143-8/+9
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Replaced some casts by an union. Improved commentsPhilipp Reisner2010-10-143-8/+12
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Bugfix: rs_in_flight could become wrong if read_for_csum() requested ↵Philipp Reisner2010-10-141-1/+3
| | | | | | | reschedule later Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: The new, smarter resync speed controllerPhilipp Reisner2010-10-145-1/+151
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: New sync_param packet, that includes the parameters of the new controllerPhilipp Reisner2010-10-144-8/+37
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: New sync parameters for the smart resync rate controllerPhilipp Reisner2010-10-144-13/+25
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: fix list corruption (recent regression)Lars Ellenberg2010-10-141-25/+17
| | | | | | | | | | | | The commit 288f422ec13667de40b278535d2a5fb5c77352c4 drbd: Track all IO requests on the TL, not writes only moved a list_add_tail(req, ) into a region where req may have just been freed due to conflict detection. Fix this by adding a proper cleanup section for that code path. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Initialize all members of sync_conf to their defaults [Bugz 315]Philipp Reisner2010-10-141-1/+2
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Make sure tl_restart(, resend) can not get called multiple times for a ↵Philipp Reisner2010-10-141-16/+15
| | | | | | | new connection Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Do not try to free tl_hash in drbd_disconnect() when IO is suspendedPhilipp Reisner2010-10-144-26/+43
| | | | | | | | | | We may not free tl_hash when IO is suspended, since we can not wait until ap_bio_cnt reaches zero. We can do this after susp reched 0, since then tl_clear was called Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Allow attach while IO is suspendedPhilipp Reisner2010-10-141-1/+1
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Allow tl_restart() to do IO completion while IO is suspendedPhilipp Reisner2010-10-141-14/+20
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Fixed a deadlock, probably only affected UP machinesPhilipp Reisner2010-10-143-2/+4
| | | | | | | | | | | | | | | After disconnect (most likely mdev->net_cnt == 0) and we are still in an unstable state (!drbd_state_is_stable()). When we get an IO request in drbd_get_max_buffers() (called from __inc_ap_bio_cond(), called from inc_ap_bio()) we wake up misc_wait. Misc_wait is also used in inc_ap_bio() to sleep until the outcome of __inc_ap_bio_cond() changes. => Busy loop! Solution: Have a dedicated wait queue for get_net_conf() and put_net_conf(). Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Do not do a hard state change when establishing a connection [bugz 304]Philipp Reisner2010-10-141-1/+3
| | | | | | | Make sure the state engine can deny two primaries to connect Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Ensure that the peer was not rebootet in the meantime before resending TLPhilipp Reisner2010-10-143-5/+13
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Delayed creation of current-UUIDPhilipp Reisner2010-10-143-6/+27
| | | | | | | | | | | | When a fencing policy of "resource-and-stonith" is configured, and DRBD looses connection to it's peer, we can delay the creation of a new current-UUID until IO gets thawed. That allows one to deploy fence-peer handlers that actually commit suicide on the machine they get started. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Run the fence-peer helper asynchronouslyPhilipp Reisner2010-10-143-7/+25
| | | | | | | | Since we can not thaw the transfer log, the next logical step is to allow reconnects while the fence-peer handler runs. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Reduce the verbosity of some state transitionsPhilipp Reisner2010-10-141-7/+1
| | | | | | | | | State transitions in the space of non-allowed states used to be very noisy. Reduce that, since that has little value for the majority of the user base. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Removing a by now obsolete clause in the state sanitizingPhilipp Reisner2010-10-141-3/+0
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Now we need to handle the ed_uuid of an diskless, unconnected primary ↵Philipp Reisner2010-10-142-1/+8
| | | | | | | correctly Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Disabled the crashed_primary detection for re-attach of last data ↵Philipp Reisner2010-10-141-1/+3
| | | | | | | while IO is frozen Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Do not allow a fencing-policy of resource-and-stonith with protocol APhilipp Reisner2010-10-143-2/+21
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Finished the "on-no-data-accessible suspend-io;" functionalityPhilipp Reisner2010-10-149-1/+90
| | | | | | | | | When no data is accessible (no connection to the peer, nor a local disk) allow the user to select to freeze all IO operations instead of getting IO errors. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Removed redundant error checks in the request code pathPhilipp Reisner2010-10-141-15/+0
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: factored drbd_req_make_private_bio() out of drbd_req_new()Philipp Reisner2010-10-141-9/+15
| | | | | | | Preparing tl_thaw_dio() Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Do not send two barriers without any writes between themPhilipp Reisner2010-10-141-2/+7
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: factored tl_restart() out of tl_clear().Philipp Reisner2010-10-145-40/+103
| | | | | | | | If IO was frozen for a temporal network outage, resend the content of the transfer-log into the newly established connection. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: mod_req has now a return valuePhilipp Reisner2010-10-142-6/+16
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Track all IO requests on the TL, not writes onlyPhilipp Reisner2010-10-144-47/+23
| | | | | | | With that the drbd_fail_pending_reads() function becomes obsolete. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: renamed drbd_tl_epoch.n_req to drbd_tl_epoch.n_writesPhilipp Reisner2010-10-143-9/+9
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* amiga floppy: Compile failure fixesVivek Goyal2010-09-261-3/+2
| | | | | | | o Compile fixes for amiga floppy driver. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* atari floppy: Stop sharing request queue across multiple gendisksVivek Goyal2010-09-241-11/+39
| | | | | | | | | | o Use one request queue per gendisk instead of sharing the queue. o Don't have hardware. No compile testing or run time testing done. Completely untested. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* amiga floppy: Stop sharing request queue across multiple gendisksVivek Goyal2010-09-241-11/+48
| | | | | | | | | | o Use one request queue per gendisk instead of sharing request queue o Don't have hardware. No compile testing or run time testing done. Completely untested. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* floppy: switch to one queue per drive instead of sharing a queueJens Axboe2010-09-221-21/+45
| | | | | | | | | | | | | Pretty straight forward conversion. Note that we do round-robin between the drives that have available requests, before we simply used the drive that the IO scheduler told us to. Since the IO scheduler doesn't care about multiple devices per queue, the resulting sort would not have made sense. Fixed by Vivek to get rid of a double lock problem in set_next_request() Signed-off-by: Jens Axboe <jaxboe@fusionio.com> Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
* cciss: remove some superfluous tests from cciss_bigpassthru()Stephen M. Cameron2010-09-101-17/+8
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_big_passthruStephen M. Cameron2010-09-101-156/+151
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_passthruStephen M. Cameron2010-09-101-111/+101
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_getluninfoStephen M. Cameron2010-09-101-14/+18
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_getdrivverStephen M. Cameron2010-09-101-13/+13
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_getfirmverStephen M. Cameron2010-09-101-12/+15
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_getbustypesStephen M. Cameron2010-09-101-11/+13
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_getheartbeatStephen M. Cameron2010-09-101-11/+13
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_setnodenameStephen M. Cameron2010-09-101-36/+29
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_getnodenameStephen M. Cameron2010-09-101-13/+15
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_setintinfoStephen M. Cameron2010-09-101-34/+32
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_getintinfoStephen M. Cameron2010-09-101-13/+15
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* cciss: factor out cciss_getpciinfoStephen M. Cameron2010-09-101-17/+17
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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