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* Fix asymmetry in devstat(9) calls by GEOM.Alexander Motin2020-10-241-0/+11
| | | | | | | | | | | | Before this GEOM passed bio pointer to transaction start, but not end. It was irrelevant until devstat(9) got DTrace hooks, that appeared to provide bio pointer on I/O completion, but not on submission. MFC after: 2 weeks Sponsored by: iXsystems, Inc. Notes: svn path=/head/; revision=367022
* Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)Pawel Biernacki2020-02-261-3/+5
| | | | | | | | | | | | | | | | | | | r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are still not MPSAFE (or already are but aren’t properly marked). Use it in preparation for a general review of all nodes. This is non-functional change that adds annotations to SYSCTL_NODE and SYSCTL_PROC nodes using one of the soon-to-be-required flags. Mark all obvious cases as MPSAFE. All entries that haven't been marked as MPSAFE before are by default marked as NEEDGIANT Approved by: kib (mentor, blanket) Commented by: kib, gallatin, melifaro Differential Revision: https://reviews.freebsd.org/D23718 Notes: svn path=/head/; revision=358333
* Use atomic for start_count in devstat_start_transaction().Alexander Motin2019-12-301-6/+1
| | | | | | | | | | | Combined with earlier nstart/nend removal it allows to remove several locks from request path of GEOM and few other places. It would be cool if we had more SMP-friendly statistics, but this helps too. Sponsored by: iXsystems, Inc. Notes: svn path=/head/; revision=356200
* Make devstat_end_transaction_bio() count BIO_ORDERED.Alexander Motin2019-12-061-1/+6
| | | | | | | MFC after: 2 weeks Notes: svn path=/head/; revision=355457
* devstat(9): Constify function parameters that can be constConrad Meyer2018-08-231-6/+6
| | | | | | | | | | | | | | | No functional change. When attempting to document the changed argument types in devstat.9, I discovered the 20 year old manual page severely mismatched reality even prior to my simple change. So I took a first cut pass cleaning that up to match reality. I'm sure I've missed some things; the goal was just to leave it better than when I started. Sponsored by: Dell EMC Isilon Notes: svn path=/head/; revision=338220
* sys/kern: adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-271-0/+2
| | | | | | | | | | | | | | | Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Notes: svn path=/head/; revision=326271
* Add support for managing Shingled Magnetic Recording (SMR) drives.Kenneth D. Merry2016-05-191-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change includes support for SCSI SMR drives (which conform to the Zoned Block Commands or ZBC spec) and ATA SMR drives (which conform to the Zoned ATA Command Set or ZAC spec) behind SAS expanders. This includes full management support through the GEOM BIO interface, and through a new userland utility, zonectl(8), and through camcontrol(8). This is now ready for filesystems to use to detect and manage zoned drives. (There is no work in progress that I know of to use this for ZFS or UFS, if anyone is interested, let me know and I may have some suggestions.) Also, improve ATA command passthrough and dispatch support, both via ATA and ATA passthrough over SCSI. Also, add support to camcontrol(8) for the ATA Extended Power Conditions feature set. You can now manage ATA device power states, and set various idle time thresholds for a drive to enter lower power states. Note that this change cannot be MFCed in full, because it depends on changes to the struct bio API that break compatilibity. In order to avoid breaking the stable API, only changes that don't touch or depend on the struct bio changes can be merged. For example, the camcontrol(8) changes don't depend on the new bio API, but zonectl(8) and the probe changes to the da(4) and ada(4) drivers do depend on it. Also note that the SMR changes have not yet been tested with an actual SCSI ZBC device, or a SCSI to ATA translation layer (SAT) that supports ZBC to ZAC translation. I have not yet gotten a suitable drive or SAT layer, so any testing help would be appreciated. These changes have been tested with Seagate Host Aware SATA drives attached to both SAS and SATA controllers. Also, I do not have any SATA Host Managed devices, and I suspect that it may take additional (hopefully minor) changes to support them. Thanks to Seagate for supplying the test hardware and answering questions. sbin/camcontrol/Makefile: Add epc.c and zone.c. sbin/camcontrol/camcontrol.8: Document the zone and epc subcommands. sbin/camcontrol/camcontrol.c: Add the zone and epc subcommands. Add auxiliary register support to build_ata_cmd(). Make sure to set the CAM_ATAIO_NEEDRESULT, CAM_ATAIO_DMA, and CAM_ATAIO_FPDMA flags as appropriate for ATA commands. Add a new get_ata_status() function to parse ATA result from SCSI sense descriptors (for ATA passthrough over SCSI) and ATA I/O requests. sbin/camcontrol/camcontrol.h: Update the build_ata_cmd() prototype Add get_ata_status(), zone(), and epc(). sbin/camcontrol/epc.c: Support for ATA Extended Power Conditions features. This includes support for all features documented in the ACS-4 Revision 12 specification from t13.org (dated February 18, 2016). The EPC feature set allows putting a drive into a power power mode immediately, or setting timeouts so that the drive will automatically enter progressively lower power states after various idle times. sbin/camcontrol/fwdownload.c: Update the firmware download code for the new build_ata_cmd() arguments. sbin/camcontrol/zone.c: Implement support for Shingled Magnetic Recording (SMR) drives via SCSI Zoned Block Commands (ZBC) and ATA Zoned Device ATA Command Set (ZAC). These specs were developed in concert, and are functionally identical. The primary differences are due to SCSI and ATA differences. (SCSI is big endian, ATA is little endian, for example.) This includes support for all commands defined in the ZBC and ZAC specs. sys/cam/ata/ata_all.c: Decode a number of additional ATA command names in ata_op_string(). Add a new CCB building function, ata_read_log(). Add ata_zac_mgmt_in() and ata_zac_mgmt_out() CCB building functions. These support both DMA and NCQ encapsulation. sys/cam/ata/ata_all.h: Add prototypes for ata_read_log(), ata_zac_mgmt_out(), and ata_zac_mgmt_in(). sys/cam/ata/ata_da.c: Revamp the ada(4) driver to support zoned devices. Add four new probe states to gather information needed for zone support. Add a new adasetflags() function to avoid duplication of large blocks of flag setting between the async handler and register functions. Add new sysctl variables that describe zone support and paramters. Add support for the new BIO_ZONE bio, and all of its subcommands: DISK_ZONE_OPEN, DISK_ZONE_CLOSE, DISK_ZONE_FINISH, DISK_ZONE_RWP, DISK_ZONE_REPORT_ZONES, and DISK_ZONE_GET_PARAMS. sys/cam/scsi/scsi_all.c: Add command descriptions for the ZBC IN/OUT commands. Add descriptions for ZBC Host Managed devices. Add a new function, scsi_ata_pass() to do ATA passthrough over SCSI. This will eventually replace scsi_ata_pass_16() -- it can create the 12, 16, and 32-byte variants of the ATA PASS-THROUGH command, and supports setting all of the registers defined as of SAT-4, Revision 5 (March 11, 2016). Change scsi_ata_identify() to use scsi_ata_pass() instead of scsi_ata_pass_16(). Add a new scsi_ata_read_log() function to facilitate reading ATA logs via SCSI. sys/cam/scsi/scsi_all.h: Add the new ATA PASS-THROUGH(32) command CDB. Add extended and variable CDB opcodes. Add Zoned Block Device Characteristics VPD page. Add ATA Return SCSI sense descriptor. Add prototypes for scsi_ata_read_log() and scsi_ata_pass(). sys/cam/scsi/scsi_da.c: Revamp the da(4) driver to support zoned devices. Add five new probe states, four of which are needed for ATA devices. Add five new sysctl variables that describe zone support and parameters. The da(4) driver supports SCSI ZBC devices, as well as ATA ZAC devices when they are attached via a SCSI to ATA Translation (SAT) layer. Since ZBC -> ZAC translation is a new feature in the T10 SAT-4 spec, most SATA drives will be supported via ATA commands sent via the SCSI ATA PASS-THROUGH command. The da(4) driver will prefer the ZBC interface, if it is available, for performance reasons, but will use the ATA PASS-THROUGH interface to the ZAC command set if the SAT layer doesn't support translation yet. As I mentioned above, ZBC command support is untested. Add support for the new BIO_ZONE bio, and all of its subcommands: DISK_ZONE_OPEN, DISK_ZONE_CLOSE, DISK_ZONE_FINISH, DISK_ZONE_RWP, DISK_ZONE_REPORT_ZONES, and DISK_ZONE_GET_PARAMS. Add scsi_zbc_in() and scsi_zbc_out() CCB building functions. Add scsi_ata_zac_mgmt_out() and scsi_ata_zac_mgmt_in() CCB/CDB building functions. Note that these have return values, unlike almost all other CCB building functions in CAM. The reason is that they can fail, depending upon the particular combination of input parameters. The primary failure case is if the user wants NCQ, but fails to specify additional CDB storage. NCQ requires using the 32-byte version of the SCSI ATA PASS-THROUGH command, and the current CAM CDB size is 16 bytes. sys/cam/scsi/scsi_da.h: Add ZBC IN and ZBC OUT CDBs and opcodes. Add SCSI Report Zones data structures. Add scsi_zbc_in(), scsi_zbc_out(), scsi_ata_zac_mgmt_out(), and scsi_ata_zac_mgmt_in() prototypes. sys/dev/ahci/ahci.c: Fix SEND / RECEIVE FPDMA QUEUED in the ahci(4) driver. ahci_setup_fis() previously set the top bits of the sector count register in the FIS to 0 for FPDMA commands. This is okay for read and write, because the PRIO field is in the only thing in those bits, and we don't implement that further up the stack. But, for SEND and RECEIVE FPDMA QUEUED, the subcommand is in that byte, so it needs to be transmitted to the drive. In ahci_setup_fis(), always set the the top 8 bits of the sector count register. We need it in both the standard and NCQ / FPDMA cases. sys/geom/eli/g_eli.c: Pass BIO_ZONE commands through the GELI class. sys/geom/geom.h: Add g_io_zonecmd() prototype. sys/geom/geom_dev.c: Add new DIOCZONECMD ioctl, which allows sending zone commands to disks. sys/geom/geom_disk.c: Add support for BIO_ZONE commands. sys/geom/geom_disk.h: Add a new flag, DISKFLAG_CANZONE, that indicates that a given GEOM disk client can handle BIO_ZONE commands. sys/geom/geom_io.c: Add a new function, g_io_zonecmd(), that handles execution of BIO_ZONE commands. Add permissions check for BIO_ZONE commands. Add command decoding for BIO_ZONE commands. sys/geom/geom_subr.c: Add DDB command decoding for BIO_ZONE commands. sys/kern/subr_devstat.c: Record statistics for REPORT ZONES commands. Note that the number of bytes transferred for REPORT ZONES won't quite match what is received from the harware. This is because we're necessarily counting bytes coming from the da(4) / ada(4) drivers, which are using the disk_zone.h interface to communicate up the stack. The structure sizes it uses are slightly different than the SCSI and ATA structure sizes. sys/sys/ata.h: Add many bit and structure definitions for ZAC, NCQ, and EPC command support. sys/sys/bio.h: Convert the bio_cmd field to a straight enumeration. This will yield more space for additional commands in the future. After change r297955 and other related changes, this is now possible. Converting to an enumeration will also prevent use as a bitmask in the future. sys/sys/disk.h: Define the DIOCZONECMD ioctl. sys/sys/disk_zone.h: Add a new API for managing zoned disks. This is very close to the SCSI ZBC and ATA ZAC standards, but uses integers in native byte order instead of big endian (SCSI) or little endian (ATA) byte arrays. This is intended to offer to the complete feature set of the ZBC and ZAC disk management without requiring the application developer to include SCSI or ATA headers. We also use one set of headers for ioctl consumers and kernel bio-level consumers. sys/sys/param.h: Bump __FreeBSD_version for sys/bio.h command changes, and inclusion of SMR support. usr.sbin/Makefile: Add the zonectl utility. usr.sbin/diskinfo/diskinfo.c Add disk zoning capability to the 'diskinfo -v' output. usr.sbin/zonectl/Makefile: Add zonectl makefile. usr.sbin/zonectl/zonectl.8 zonectl(8) man page. usr.sbin/zonectl/zonectl.c The zonectl(8) utility. This allows managing SCSI or ATA zoned disks via the disk_zone.h API. You can report zones, reset write pointers, get parameters, etc. Sponsored by: Spectra Logic Differential Revision: https://reviews.freebsd.org/D6147 Reviewed by: wblock (documentation) Notes: svn path=/head/; revision=300207
* sys/kern: spelling fixes in comments.Pedro F. Giffuni2016-04-291-1/+1
| | | | | | | No functional change. Notes: svn path=/head/; revision=298819
* Fix multiple incorrect SYSCTL arguments in the kernel:Hans Petter Selasky2014-10-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Wrong integer type was specified. - Wrong or missing "access" specifier. The "access" specifier sometimes included the SYSCTL type, which it should not, except for procedural SYSCTL nodes. - Logical OR where binary OR was expected. - Properly assert the "access" argument passed to all SYSCTL macros, using the CTASSERT macro. This applies to both static- and dynamically created SYSCTLs. - Properly assert the the data type for both static and dynamic SYSCTLs. In the case of static SYSCTLs we only assert that the data pointed to by the SYSCTL data pointer has the correct size, hence there is no easy way to assert types in the C language outside a C-function. - Rewrote some code which doesn't pass a constant "access" specifier when creating dynamic SYSCTL nodes, which is now a requirement. - Updated "EXAMPLES" section in SYSCTL manual page. MFC after: 3 days Sponsored by: Mellanox Technologies Notes: svn path=/head/; revision=273377
* change defaule permissions on /dev/devstat. while i'm here removeMaksim Yevmenkin2014-03-241-2/+4
| | | | | | | | | | | D_NEEDGIANT flag Submitted by: jhb Reviewed by: jhb, scottl, rwatson, delphij, phk MFC after: 1 week Notes: svn path=/head/; revision=263690
* dtrace sdt: remove the ugly sname parameter of SDT_PROBE_DEFINEAndriy Gapon2013-11-261-6/+6
| | | | | | | | | | | In its stead use the Solaris / illumos approach of emulating '-' (dash) in probe names with '__' (two consecutive underscores). Reviewed by: markj MFC after: 3 weeks Notes: svn path=/head/; revision=258622
* - For kernel compiled only with KDTRACE_HOOKS and not any lock debuggingAttilio Rao2013-11-251-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | option, unbreak the lock tracing release semantic by embedding calls to LOCKSTAT_PROFILE_RELEASE_LOCK() direclty in the inlined version of the releasing functions for mutex, rwlock and sxlock. Failing to do so skips the lockstat_probe_func invokation for unlocking. - As part of the LOCKSTAT support is inlined in mutex operation, for kernel compiled without lock debugging options, potentially every consumer must be compiled including opt_kdtrace.h. Fix this by moving KDTRACE_HOOKS into opt_global.h and remove the dependency by opt_kdtrace.h for all files, as now only KDTRACE_FRAMES is linked there and it is only used as a compile-time stub [0]. [0] immediately shows some new bug as DTRACE-derived support for debug in sfxge is broken and it was never really tested. As it was not including correctly opt_kdtrace.h before it was never enabled so it was kept broken for a while. Fix this by using a protection stub, leaving sfxge driver authors the responsibility for fixing it appropriately [1]. Sponsored by: EMC / Isilon storage division Discussed with: rstone [0] Reported by: rstone [1] Discussed with: philip Notes: svn path=/head/; revision=258541
* Redefine the io provider using the SDT(9) macros instead of doing everythingMark Johnston2013-10-241-51/+16
| | | | | | | | | manually. This change has no functional impact. Discussed with: gnn Notes: svn path=/head/; revision=257037
* Merge GEOM direct dispatch changes from the projects/camlock branch.Alexander Motin2013-10-221-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When safety requirements are met, it allows to avoid passing I/O requests to GEOM g_up/g_down thread, executing them directly in the caller context. That allows to avoid CPU bottlenecks in g_up/g_down threads, plus avoid several context switches per I/O. The defined now safety requirements are: - caller should not hold any locks and should be reenterable; - callee should not depend on GEOM dual-threaded concurency semantics; - on the way down, if request is unmapped while callee doesn't support it, the context should be sleepable; - kernel thread stack usage should be below 50%. To keep compatibility with GEOM classes not meeting above requirements new provider and consumer flags added: - G_CF_DIRECT_SEND -- consumer code meets caller requirements (request); - G_CF_DIRECT_RECEIVE -- consumer code meets callee requirements (done); - G_PF_DIRECT_SEND -- provider code meets caller requirements (done); - G_PF_DIRECT_RECEIVE -- provider code meets callee requirements (request). Capable GEOM class can set them, allowing direct dispatch in cases where it is safe. If any of requirements are not met, request is queued to g_up or g_down thread same as before. Such GEOM classes were reviewed and updated to support direct dispatch: CONCAT, DEV, DISK, GATE, MD, MIRROR, MULTIPATH, NOP, PART, RAID, STRIPE, VFS, ZERO, ZFS::VDEV, ZFS::ZVOL, all classes based on g_slice KPI (LABEL, MAP, FLASHMAP, etc). To declare direct completion capability disk(9) KPI got new flag equivalent to G_PF_DIRECT_SEND -- DISKFLAG_DIRECT_COMPLETION. da(4) and ada(4) disk drivers got it set now thanks to earlier CAM locking work. This change more then twice increases peak block storage performance on systems with manu CPUs, together with earlier CAM locking changes reaching more then 1 million IOPS (512 byte raw reads from 16 SATA SSDs on 4 HBAs to 256 user-level threads). Sponsored by: iXsystems, Inc. MFC after: 2 months Notes: svn path=/head/; revision=256880
* MFprojects/camlock r254905:Alexander Motin2013-10-161-1/+9
| | | | | | | | | Introduce new function devstat_end_transaction_bio_bt(), adding new argument to specify present time. Use this function to move binuptime() out of lock, substantially reducing lock congestion when slow timecounter is used. Notes: svn path=/head/; revision=256603
* Fix build for kernels with dtrace hooks.Konstantin Belousov2012-07-111-0/+4
| | | | | | | MFC after: 1 month Notes: svn path=/head/; revision=238372
* Initial commit of an I/O provider for DTrace on FreeBSD.George V. Neville-Neil2012-07-111-0/+54
| | | | | | | | | | | | | | | These probes are most useful when looking into the structures they provide, which are listed in io.d. For example: dtrace -n 'io:genunix::start { printf("%d\n", args[0]->bio_bcount); }' Note that the I/O systems in FreeBSD and Solaris/Illumos are sufficiently different that there is not a 1:1 mapping from scripts that work with one to the other. MFC after: 1 month Notes: svn path=/head/; revision=238366
* Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.Ed Schouten2011-11-071-1/+2
| | | | | | | | | The SYSCTL_NODE macro defines a list that stores all child-elements of that node. If there's no SYSCTL_DECL macro anywhere else, there's no reason why it shouldn't be static. Notes: svn path=/head/; revision=227309
* Instead of using an atomic operation to determine whether the devstat(9)Kenneth D. Merry2011-06-131-3/+5
| | | | | | | | | | | | | | | device node has been created, pass MAKEDEV_CHECKNAME in so that the devfs code will do the check. Use a regular static variable as before, that's good enough to keep us from calling into devfs most of the time. Suggested by: kib MFC after: 1 week Sponsored by: Spectra Logic Corporation Notes: svn path=/head/; revision=223062
* Fix a couple of race conditions in devstat(9) initialization.Justin T. Gibbs2011-06-131-9/+3
| | | | | | | | | | | | | | | | | | | | In devstat_new_entry(), there is no need to initialize the queue and the mutex in this function. There are ways to do static initialization on both, so use STAILQ_HEAD_INITIALIZER and MTX_SYSINIT to initialize the queue and the mutex. In devstat_alloc(), use an atomic test and set routine to guard making our entry in /dev. Using just a plain static variable creates a race condition on multiprocessor machines. If you attempt to create a second entry in devfs, the kernel will panic. Submitted by: kdm Reviewed by: gibbs Sponsored by: Spectra Logic Corporation MFC after: 1 week. Notes: svn path=/head/; revision=223061
* Finish r210923, 210926. Mark some devices as eternal.Konstantin Belousov2011-01-041-1/+1
| | | | | | | MFC after: 2 weeks Notes: svn path=/head/; revision=216952
* Use ISO C99 integer types in sys/kern where possible.Ed Schouten2010-06-211-4/+4
| | | | | | | | | There are only about 100 occurences of the BSD-specific u_int*_t datatypes in sys/kern. The ISO C99 integer types are used here more often. Notes: svn path=/head/; revision=209390
* Update d_mmap() to accept vm_ooffset_t and vm_memattr_t.Robert Noland2009-12-291-1/+2
| | | | | | | | | | | | | | | | This replaces d_mmap() with the d_mmap2() implementation and also changes the type of offset to vm_ooffset_t. Purge d_mmap2(). All driver modules will need to be rebuilt since D_VERSION is also bumped. Reviewed by: jhb@ MFC after: Not in this lifetime... Notes: svn path=/head/; revision=201223
* Don't allocate new unnecessary pages when devstat_alloc() looses theAttilio Rao2009-09-181-16/+27
| | | | | | | | | | | run for re-acuiring the lock, but recheck if new pages are allocatable from the pool and free the previously allocated ones. Tested by: pho, Giovanni Trematerra <giovanni dot trematerra at gmail dot com> Notes: svn path=/head/; revision=197309
* Use NULL in preference to 0 in pointer contexts.Warner Losh2009-02-031-3/+3
| | | | Notes: svn path=/head/; revision=188063
* - Remove two mtx_asserts that can incorrectly trigger ifJeff Roberson2005-05-031-4/+0
| | | | | | | | | | | devstat_end_transaction is called from a fast interrupt. Presently there is no way for mtx_assert to determine that we're not executing in a real thread context. Submitted by: jhusted@isilon.com Notes: svn path=/head/; revision=145823
* /* -> /*- for copyright notices, minor format tweaks as necessaryWarner Losh2005-01-061-1/+1
| | | | Notes: svn path=/head/; revision=139804
* Do the dreaded s/dev_t/struct cdev */Poul-Henning Kamp2004-06-161-1/+1
| | | | | | | Bump __FreeBSD_version accordingly. Notes: svn path=/head/; revision=130585
* Device megapatch 4/6:Poul-Henning Kamp2004-02-211-0/+2
| | | | | | | | | | | Introduce d_version field in struct cdevsw, this must always be initialized to D_VERSION. Flip sense of D_NOGIANT flag to D_NEEDGIANT, this involves removing four D_NOGIANT flags and adding 145 D_NEEDGIANT flags. Notes: svn path=/head/; revision=126080
* The present defaults for the open and close for device drivers whichPoul-Henning Kamp2003-09-271-2/+0
| | | | | | | | | | | | | | | | | provide no methods does not make any sense, and is not used by any driver. It is a pretty hard to come up with even a theoretical concept of a device driver which would always fail open and close with ENODEV. Change the defaults to be nullopen() and nullclose() which simply does nothing. Remove explicit initializations to these from the drivers which already used them. Notes: svn path=/head/; revision=120506
* It is not an error to have no devices in the kernel: Return thePoul-Henning Kamp2003-08-171-4/+4
| | | | | | | generation number and start it from one instead of zero. Notes: svn path=/head/; revision=119028
* Use __FBSDID().David E. O'Brien2003-06-111-2/+3
| | | | Notes: svn path=/head/; revision=116182
* Unbreak vinum, iostat and systat on sparc64 by changing the devstatHartmut Brandt2003-04-171-3/+3
| | | | | | | | | | generation number back to a long (sizeof(u_int) != sizeof(long) on sparc64). The alternative would have been to heavily change the libdevstat API. Discussed with: phk, ken Notes: svn path=/head/; revision=113599
* - Add vm_paddr_t, a physical address type. This is required for systemsJake Burkholder2003-03-251-1/+1
| | | | | | | | | | | | | | | | | | where physical addresses larger than virtual addresses, such as i386s with PAE. - Use this to represent physical addresses in the MI vm system and in the i386 pmap code. This also changes the paddr parameter to d_mmap_t. - Fix printf formats to handle physical addresses >4G in the i386 memory detection code, and due to kvtop returning vm_paddr_t instead of u_long. Note that this is a name change only; vm_paddr_t is still the same as vm_offset_t on all currently supported platforms. Sponsored by: DARPA, Network Associates Laboratories Discussed with: re, phk (cdevsw change) Notes: svn path=/head/; revision=112569
* long != int. Use SYSCTL_UINT for kern.devstat.generation. Fixes bootingJake Burkholder2003-03-181-1/+1
| | | | | | | on sparc64. Notes: svn path=/head/; revision=112388
* If devstat_new_entry() is passed a unit number of -1 assume thatPoul-Henning Kamp2003-03-181-4/+12
| | | | | | | | | | | | | | | | | | the devstat is for an "interior" GEOM node and register using the name argument as a geom identity pointer. Do not put these devstat structures on the list returned by the sysctl. This gives us the ability to tell the two kinds of nodes apart and leave the current "strictly physical" view of devstat intact without modifications, yet be able to use devstat for both kinds of devices. It also saves us bloating struct devstat with another 48 bytes of space for the name. At least for now. Reviewed by: ken Notes: svn path=/head/; revision=112369
* Make devstat fully Giant agnostic:Poul-Henning Kamp2003-03-181-42/+135
| | | | | | | | | | | | | | | | | | | | | | | | Add a mutex and protect the allocation and traversal of the list with it. When we allocate a page for devstat use we drop the mutex and use M_WAITOK this is not nice, but under the given circumstances the best we can do. In the sysctl handler for returning the devstat entries we do not want to hold the mutex across copyout(9) calls, so we keep a very careful eye on the devstat_generation count, and abandon with EBUSY if it changes under our feet. Specifically test for BIO_WRITE, rather than default non-read,non-deletes as write. Make the default be DEVSTAT_NO_DATA. Add atomic increments of the sequence[01] fields so applications using the mmap'ed view stand a chance of detecting updates in progress. Reviewed by: ken Notes: svn path=/head/; revision=112368
* Make devstat_new_entry() take a const void * rather than const char *Poul-Henning Kamp2003-03-181-5/+5
| | | | | | | argument, GEOM nodes are not identified by ascii string. Notes: svn path=/head/; revision=112365
* Add a #define for the device name of the mmap device for devstat.Poul-Henning Kamp2003-03-161-1/+1
| | | | | | | Constify the geom identification pointer. Notes: svn path=/head/; revision=112326
* One devstat_start_transaction_bio() is enough.Poul-Henning Kamp2003-03-151-7/+0
| | | | Notes: svn path=/head/; revision=112292
* Run a revision of the devstat interface:Poul-Henning Kamp2003-03-151-40/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Kernel: Change statistics to use the *uptime() timescale (ie: relative to boottime) rather than the UTC aligned timescale. This makes the device statistics code oblivious to clock steps. Change timestamps to bintime format, they are cheaper. Remove the "busy_count", and replace it with two counter fields: "start_count" and "end_count", which are updated in the down and up paths respectively. This removes the locking constraint on devstat. Add a timestamp argument to devstat_start_transaction(), this will normally be a timestamp set by the *_bio() function in bp->bio_t0. Use this field to calculate duration of I/O operations. Add two timestamp arguments to devstat_end_transaction(), one is the current time, a NULL pointer means "take timestamp yourself", the other is the timestamp of when this transaction started (see above). Change calculation of busy_time to operate on "the salami principle": Only when we are idle, which we can determine by the start+end counts being identical, do we update the "busy_from" field in the down path. In the up path we accumulate the timeslice in busy_time and update busy_from. Change the byte_* and num_* fields into two arrays: bytes[] and operations[]. Userland: Change the misleading "busy_time" name to be called "snap_time" and make the time long double since that is what most users need anyway, fill it using clock_gettime(CLOCK_MONOTONIC) to put it on the same timescale as the kernel fields. Change devstat_compute_etime() to operate on struct bintime. Remove the version 2 legacy interface: the change to bintime makes compatibility far too expensive. Fix a bug in systat's "vm" page where boot relative busy times would be bogus. Bump __FreeBSD_version to 500107 Review & Collaboration by: ken Notes: svn path=/head/; revision=112288
* Add a devstat_start_transaction_bio() to match thePoul-Henning Kamp2003-03-151-0/+7
| | | | | | | | | | devstat_end_transaction_bio() we already have. For now it just calls devstat_start_transaction(), but that will change shortly. Notes: svn path=/head/; revision=112258
* Note that MAJOR_AUTO is now the default if d_maj is not initialized. ThisPoul-Henning Kamp2003-03-091-1/+0
| | | | | | | | | | | is more robust and prevents the hijacking of /dev/console for the typical mistake. Remove unneeded MAJOR_AUTO uses, it is only needed explicitly now if the driver source has cross-branch compatibility to old releases. Notes: svn path=/head/; revision=112037
* Retire devstat_add_entry() as a public function and bump __FreeBSD_versionPoul-Henning Kamp2003-03-081-1/+6
| | | | | | | to mark this act. Notes: svn path=/head/; revision=112007
* Introduce a device driver for /dev/devstat, this will allow us to mmapPoul-Henning Kamp2003-03-081-0/+112
| | | | | | | | | | the device statistics structures into userland instead of using sysctl. Introduce new devstat_new_entry() function which allocates the devstat structure an calls devstat_add_entry() on it. Notes: svn path=/head/; revision=112001
* Use strlcpy() instead of strncpy() to copy NUL terminated stringsRobert Drehmel2002-10-171-2/+1
| | | | | | | for safety and consistency. Notes: svn path=/head/; revision=105354
* GC: BIO_ORDERED, various infrastructure dealing with BIO_ORDERED.Poul-Henning Kamp2002-02-221-2/+1
| | | | Notes: svn path=/head/; revision=91063
* Export the head structure for the device statistics STAILQ inThomas Moestl2001-08-041-1/+1
| | | | | | | | sys/devicestat.h, so that the queue can be walked in crashdumps using libkvm. Notes: svn path=/head/; revision=81129
* Another round of the <sys/queue.h> FOREACH transmogriffer.Poul-Henning Kamp2001-02-041-2/+1
| | | | | | | | Created with: sed(1) Reviewed by: md5(1) Notes: svn path=/head/; revision=72012
* Support for unsigned integer and long sysctl variables. Update theJohn Baldwin2000-07-051-1/+1
| | | | | | | | | | | | SYSCTL_LONG macro to be consistent with other integer sysctl variables and require an initial value instead of assuming 0. Update several sysctl variables to use the unsigned types. PR: 15251 Submitted by: Kelly Yancey <kbyanc@posi.net> Notes: svn path=/head/; revision=62622
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