#
302408 |
|
07-Jul-2016 |
gjb |
Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle. Prune svn:mergeinfo from the new branch, as nothing has been merged here.
Additional commits post-branch will follow.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation |
#
300207 |
|
19-May-2016 |
ken |
Add support for managing Shingled Magnetic Recording (SMR) drives.
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)
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#
298819 |
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29-Apr-2016 |
pfg |
sys/kern: spelling fixes in comments.
No functional change.
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#
273377 |
|
21-Oct-2014 |
hselasky |
Fix multiple incorrect SYSCTL arguments in the kernel:
- 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
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263690 |
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24-Mar-2014 |
emax |
change defaule permissions on /dev/devstat. while i'm here remove D_NEEDGIANT flag
Submitted by: jhb Reviewed by: jhb, scottl, rwatson, delphij, phk MFC after: 1 week
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258622 |
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26-Nov-2013 |
avg |
dtrace sdt: remove the ugly sname parameter of SDT_PROBE_DEFINE
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
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258541 |
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25-Nov-2013 |
attilio |
- For kernel compiled only with KDTRACE_HOOKS and not any lock debugging 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
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257037 |
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24-Oct-2013 |
markj |
Redefine the io provider using the SDT(9) macros instead of doing everything manually. This change has no functional impact.
Discussed with: gnn
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256880 |
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22-Oct-2013 |
mav |
Merge GEOM direct dispatch changes from the projects/camlock branch.
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
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256603 |
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16-Oct-2013 |
mav |
MFprojects/camlock r254905: 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.
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238372 |
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11-Jul-2012 |
kib |
Fix build for kernels with dtrace hooks.
MFC after: 1 month
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#
238366 |
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11-Jul-2012 |
gnn |
Initial commit of an I/O provider for DTrace on FreeBSD.
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
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227309 |
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07-Nov-2011 |
ed |
Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.
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.
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#
223062 |
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13-Jun-2011 |
ken |
Instead of using an atomic operation to determine whether the devstat(9) 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
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223061 |
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13-Jun-2011 |
gibbs |
Fix a couple of race conditions in devstat(9) initialization.
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.
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216952 |
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04-Jan-2011 |
kib |
Finish r210923, 210926. Mark some devices as eternal.
MFC after: 2 weeks
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#
209390 |
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21-Jun-2010 |
ed |
Use ISO C99 integer types in sys/kern where possible.
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.
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#
201223 |
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29-Dec-2009 |
rnoland |
Update d_mmap() to accept vm_ooffset_t and vm_memattr_t.
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...
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197309 |
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18-Sep-2009 |
attilio |
Don't allocate new unnecessary pages when devstat_alloc() looses the 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>
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188063 |
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03-Feb-2009 |
imp |
Use NULL in preference to 0 in pointer contexts.
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#
145823 |
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03-May-2005 |
jeff |
- Remove two mtx_asserts that can incorrectly trigger if 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
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139804 |
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06-Jan-2005 |
imp |
/* -> /*- for copyright notices, minor format tweaks as necessary
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130585 |
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16-Jun-2004 |
phk |
Do the dreaded s/dev_t/struct cdev */ Bump __FreeBSD_version accordingly.
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#
126080 |
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21-Feb-2004 |
phk |
Device megapatch 4/6:
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.
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120506 |
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27-Sep-2003 |
phk |
The present defaults for the open and close for device drivers which 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.
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119028 |
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17-Aug-2003 |
phk |
It is not an error to have no devices in the kernel: Return the generation number and start it from one instead of zero.
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#
116182 |
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10-Jun-2003 |
obrien |
Use __FBSDID().
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113599 |
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17-Apr-2003 |
harti |
Unbreak vinum, iostat and systat on sparc64 by changing the devstat 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
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112569 |
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24-Mar-2003 |
jake |
- Add vm_paddr_t, a physical address type. This is required for systems 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)
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112388 |
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18-Mar-2003 |
jake |
long != int. Use SYSCTL_UINT for kern.devstat.generation. Fixes booting on sparc64.
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#
112369 |
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18-Mar-2003 |
phk |
If devstat_new_entry() is passed a unit number of -1 assume that 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
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#
112368 |
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18-Mar-2003 |
phk |
Make devstat fully Giant agnostic:
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
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112365 |
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18-Mar-2003 |
phk |
Make devstat_new_entry() take a const void * rather than const char * argument, GEOM nodes are not identified by ascii string.
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#
112326 |
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16-Mar-2003 |
phk |
Add a #define for the device name of the mmap device for devstat. Constify the geom identification pointer.
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#
112292 |
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15-Mar-2003 |
phk |
One devstat_start_transaction_bio() is enough.
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#
112288 |
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15-Mar-2003 |
phk |
Run a revision of the devstat interface:
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
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112258 |
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15-Mar-2003 |
phk |
Add a devstat_start_transaction_bio() to match the devstat_end_transaction_bio() we already have.
For now it just calls devstat_start_transaction(), but that will change shortly.
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112037 |
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09-Mar-2003 |
phk |
Note that MAJOR_AUTO is now the default if d_maj is not initialized. This 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.
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112007 |
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08-Mar-2003 |
phk |
Retire devstat_add_entry() as a public function and bump __FreeBSD_version to mark this act.
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#
112001 |
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08-Mar-2003 |
phk |
Introduce a device driver for /dev/devstat, this will allow us to mmap 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.
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#
105354 |
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17-Oct-2002 |
robert |
Use strlcpy() instead of strncpy() to copy NUL terminated strings for safety and consistency.
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#
91063 |
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22-Feb-2002 |
phk |
GC: BIO_ORDERED, various infrastructure dealing with BIO_ORDERED.
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#
81129 |
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04-Aug-2001 |
tmm |
Export the head structure for the device statistics STAILQ in sys/devicestat.h, so that the queue can be walked in crashdumps using libkvm.
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#
72012 |
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04-Feb-2001 |
phk |
Another round of the <sys/queue.h> FOREACH transmogriffer.
Created with: sed(1) Reviewed by: md5(1)
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#
62622 |
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05-Jul-2000 |
jhb |
Support for unsigned integer and long sysctl variables. Update the 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>
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62573 |
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04-Jul-2000 |
phk |
Previous commit changing SYSCTL_HANDLER_ARGS violated KNF.
Pointed out by: bde
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62454 |
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03-Jul-2000 |
phk |
Style police catches up with rev 1.26 of src/sys/sys/sysctl.h:
Sanitize SYSCTL_HANDLER_ARGS so that simplistic tools can grog our sources:
-sysctl_vm_zone SYSCTL_HANDLER_ARGS +sysctl_vm_zone (SYSCTL_HANDLER_ARGS)
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60938 |
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26-May-2000 |
jake |
Back out the previous change to the queue(3) interface. It was not discussed and should probably not happen.
Requested by: msmith and others
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60833 |
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23-May-2000 |
jake |
Change the way that the queue(3) structures are declared; don't assume that the type argument to *_HEAD and *_ENTRY is a struct.
Suggested by: phk Reviewed by: phk Approved by: mdodd
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60072 |
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06-May-2000 |
phk |
Remove devstat_end_transaction_buf() everybody uses devstat_end_transaction_bio() now.
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60041 |
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05-May-2000 |
phk |
Separate the struct bio related stuff out of <sys/buf.h> into <sys/bio.h>.
<sys/bio.h> is now a prerequisite for <sys/buf.h> but it shall not be made a nested include according to bdes teachings on the subject of nested includes.
Diskdrivers and similar stuff below specfs::strategy() should no longer need to include <sys/buf.> unless they need caching of data.
Still a few bogus uses of struct buf to track down.
Repocopy by: peter
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58942 |
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02-Apr-2000 |
phk |
Clone bio versions of certain bits of infrastructure: devstat_end_transaction_bio() bioq_* versions of bufq_* incl bioqdisksort() the corresponding "buf" versions will disappear when no longer used.
Move b_offset, b_data and b_bcount to struct bio.
Add BIO_FORMAT as a hack for fd.c etc.
We are now largely ready to start converting drivers to use struct bio instead of struct buf.
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58934 |
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02-Apr-2000 |
phk |
Move B_ERROR flag to b_ioflags and call it BIO_ERROR.
(Much of this done by script)
Move B_ORDERED flag to b_ioflags and call it BIO_ORDERED.
Move b_pblkno and b_iodone_chain to struct bio while we transition, they will be obsoleted once bio structs chain/stack.
Add bio_queue field for struct bio aware disksort.
Address a lot of stylistic issues brought up by bde.
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58345 |
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20-Mar-2000 |
phk |
Remove B_READ, B_WRITE and B_FREEBUF and replace them with a new field in struct buf: b_iocmd. The b_iocmd is enforced to have exactly one bit set.
B_WRITE was bogusly defined as zero giving rise to obvious coding mistakes.
Also eliminate the redundant struct buf flag B_CALL, it can just as efficiently be done by comparing b_iodone to NULL.
Should you get a panic or drop into the debugger, complaining about "b_iocmd", don't continue. It is likely to write on your disk where it should have been reading.
This change is a step in the direction towards a stackable BIO capability.
A lot of this patch were machine generated (Thanks to style(9) compliance!)
Vinum users: Greg has not had time to test this yet, be careful.
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53212 |
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16-Nov-1999 |
phk |
This is a partial commit of the patch from PR 14914:
Alot of the code in sys/kern directly accesses the *Q_HEAD and *Q_ENTRY structures for list operations. This patch makes all list operations in sys/kern use the queue(3) macros, rather than directly accessing the *Q_{HEAD,ENTRY} structures.
This batch of changes compile to the same object files.
Reviewed by: phk Submitted by: Jake Burkholder <jake@checker.org> PR: 14914
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51856 |
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02-Oct-1999 |
bde |
Removed unnecessary splclock() protection for getmicrotime() and getmicrouptime().
Removed unused includes.
Reviewed by: ken
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51559 |
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22-Sep-1999 |
phk |
Stylistic cleanup.
Submitted by: ken.
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51397 |
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19-Sep-1999 |
phk |
Move an end-paren to its intended place.
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51375 |
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18-Sep-1999 |
phk |
Count "free" operations in their own new tranaction type.
WARNING: libdevstat, iostat, vmstat, systat etc etc will need a recompile.
Add devstat_end_transaction_buf() which pulls all the vital data out of a struct buf which is ready for biodone().
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50477 |
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27-Aug-1999 |
peter |
$Id$ -> $FreeBSD$
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46381 |
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03-May-1999 |
billf |
Add sysctl descriptions to many SYSCTL_XXXs
PR: kern/11197 Submitted by: Adrian Chadd <adrian@FreeBSD.org> Reviewed by: billf(spelling/style/minor nits) Looked at by: bde(style)
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45569 |
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11-Apr-1999 |
eivind |
Staticize.
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43819 |
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09-Feb-1999 |
ken |
Add a prioritization field to the devstat_add_entry() call so that peripheral drivers can determine where in the devstat(9) list they are inserted.
This requires recompilation of libdevstat, systat, vmstat, rpc.rstatd, and any ports that depend on the devstat code, since the size of the devstat structure has changed. The devstat version number has been incremented as well to reflect the change.
This sorts devices in the devstat list in "more interesting" to "less interesting" order. So, for instance, da devices are now more important than floppy drives, and so will appear before floppy drives in the default output from systat, iostat, vmstat, etc.
The order of devices is, for now, kept in a central table in devicestat.h. If individual drivers were able to make a meaningful decision on what priority they should be at attach time, we could consider splitting the priority information out into the various drivers. For now, though, they have no way of knowing that, so it's easier to put them in an easy to find table.
Also, move the checkversion() call in vmstat(8) to a more logical place.
Thanks to Bruce and David O'Brien for suggestions, for reviewing this, and for putting up with the long time it has taken me to commit it. Bruce did object somewhat to the central priority table (he would rather the priorities be distributed in each driver), so his objection is duly noted here.
Reviewed by: bde, obrien
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42095 |
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27-Dec-1998 |
dfr |
Fix some 64bit truncation problems which crept into SYSCTL_LONG() with the last cleanup. Since the oid_arg2 field of struct sysctl_oid is not wide enough to hold a long, the SYSCTL_LONG() macro has been modified to only support exporting long variables by pointer instead of by value.
Reviewed by: bde
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41514 |
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04-Dec-1998 |
archie |
Examine all occurrences of sprintf(), strcat(), and str[n]cpy() for possible buffer overflow problems. Replaced most sprintf()'s with snprintf(); for others cases, added terminating NUL bytes where appropriate, replaced constants like "16" with sizeof(), etc.
These changes include several bug fixes, but most changes are for maintainability's sake. Any instance where it wasn't "immediately obvious" that a buffer overflow could not occur was made safer.
Reviewed by: Bruce Evans <bde@zeta.org.au> Reviewed by: Matthew Dillon <dillon@apollo.backplane.com> Reviewed by: Mike Spengler <mks@networkcs.com>
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41193 |
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15-Nov-1998 |
ken |
Now that the wd driver is fixed (Thanks Bruce!), re-enable the devstat_end_transaction error message that gets printed whenever the busy count is < 0.
This will help catch drivers that improperly implement devstat(9) support.
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41153 |
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14-Nov-1998 |
wollman |
My changes to the new device interface:
- Interface wth the new resource manager. - Allow for multiple drivers implementing a single devclass. - Remove ordering dependencies between header files. - Style cleanup. - Add DEVICE_SUSPEND and DEVICE_RESUME methods. - Move to a single-phase interrupt setup scheme.
Kernel builds on the Alpha are brken until Doug gets a chance to incorporate these changes on that side.
Agreed to in principle by: dfr
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40359 |
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14-Oct-1998 |
ken |
Disable the 'devstat_end_transaction' busy count printf until after 3.0 release goes out the door. We know there's a bug in the devstat implementation in the wd driver, but bde and msmith haven't been able to fix it yet.
So, disable the printf to avoid confusing/worrying people.
Suggested by: msmith
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39985 |
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06-Oct-1998 |
ken |
Make the printf when busy_time < 0 a little more descriptive. This may help track down bugs in the devstat implementation in various drivers. (i.e., any situation where the driver does not call the devstat routines once and only once for each transaction initiation and completion)
Prompted by: msmith
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39498 |
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19-Sep-1998 |
ken |
Change the devstat generation number from an int to a long. The int-sized generation was causing unaligned access faults on the Alpha.
I have incremented the devstat version number, since this is an interface change. You'll need to recompile libdevstat, systat, iostat, vmstat and rpc.rstatd along with your kernel.
Partially Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
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39229 |
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15-Sep-1998 |
gibbs |
New Kernel device statistics code.
Submitted by: "Kenneth D. Merry" <ken@plutotech.com>
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