DragonFly BSD

CVS log for src/sys/bus/cam/scsi/scsi_ch.c

[BACK] Up to [DragonFly] / src / sys / bus / cam / scsi

Request diff between arbitrary revisions


Keyword substitution: kv
Default branch: MAIN


Revision 1.27.2.1: download - view: text, markup, annotated - select for diffs
Fri Jul 18 00:08:23 2008 UTC (6 years, 3 months ago) by dillon
Branches: DragonFly_RELEASE_2_0
CVS tags: DragonFly_RELEASE_2_0_Slip
Diff to: previous 1.27: preferred, unified; next MAIN 1.28: preferred, unified
Changes since revision 1.27: +4 -6 lines
MFC CAM fixes for the 2.0 release.

Revision 1.28: download - view: text, markup, annotated - select for diffs
Fri Jul 18 00:07:23 2008 UTC (6 years, 3 months ago) by dillon
Branches: MAIN
CVS tags: HEAD, DragonFly_Preview
Diff to: previous 1.27: preferred, unified
Changes since revision 1.27: +4 -6 lines
Fix multiple bugs in CAM related devices which go away unexpectedly.  This
fixes numerous panics when pulling a USB mass media device in the midst of
heavy I/O.

* The SIM lock was being unlocked via the periph->sim path after periph
  was unheld.  periph can become free and blow up the unlock, so get
  the sim into a local variable first, then release periph.

* The code which waits for CCB completion needs to be a while loop, not
  an if.  It worked anyway, but wasn't very robust.

* Add CAM_SIM_DEREGISTERED to flag when a sim is undergoing deregistration.

* Beef up cam_dead_sim so it works more like a real sim.

* Properly install &cam_dead_sim in the device and periph structures
  related to a SCSI bus, when deregistering the bus.

* Disallow the addition of new devices when deregistering a bus.

* NULL out periph->softc when freeing it.

Revision 1.27: download - view: text, markup, annotated - select for diffs
Sun May 18 20:30:20 2008 UTC (6 years, 5 months ago) by pavalos
Branches: MAIN
Branch point for: DragonFly_RELEASE_2_0
Diff to: previous 1.26: preferred, unified
Changes since revision 1.26: +62 -79 lines
Sync CAM with FreeBSD using lockmgr locks instead of mutexes.
Note:  This is mostly a code sync with FreeBSD which improves stability
in addition to the items listed below.  This provides a framework for
releasing the mplock, but for now it's still there.

Add an xpt_print function to reduce most of the xpt_print_path/printf
pairs. Convert the core code to use it.

Initial cut at Basic Domain Validation.

Make cam_xpt's pronouncements match camcontrol (Tagged -> Command) Queueing.

Pay attention to return value from xpt_bus_register in xpt_init.

Add an xpt_rescan function and a thread that will field rescan requests.
The purpose of this is to allow a SIM (or other entities) to request a bus
rescan and have it then fielded in a different (process) context from the
caller.

Check the return value from cam_periph_acquire.

Drop the periph/sim lock when calling disk_destroy().

Drop the topology lock before calling the periph oninvalidate and dtor
vectors.

For the XPT_SASYNC_CB operation, only decouple the broadcast to the bus
and device lists instead of decoupling the whole operation.  This avoids
problems with SIMs going away.

Split the camisr into per-SIM done queues.  This optimizes the locking a
little bit and allows for direct dispatch of the doneq from certain
contexts that would otherwise face recursive locking problems.

Zero the CCBs when mallocing them.

Only schedule the xpt_finishconfig_task once.

Eliminate the use of M_TEMP.

Add a helper function for registering async callbacks.

Release the bus reference that is acquired when doing a CAMIOCOMMAND ioctl.

Zero scsi_readcapacity allocations so we can really tell if there has
been data returned.

Remove duplicate includes and fix typos.

Add a bunch of definitions and structures to support newer drivers.

When probing a newly found device, don't automatically assume that the
device supports retrieving a serial number.  Instead, first query the
list of VPD pages it does support, and only query the serial number if
it's supported, else silently move on.  This eliminates a lot of noise
during verbose booting, and will likely eliminate the need for most
NOSERIAL quirks.

Reduce diffs from FreeBSD.

Obtained-from: FreeBSD

Revision 1.26: download - view: text, markup, annotated - select for diffs
Thu Nov 29 01:48:15 2007 UTC (6 years, 11 months ago) by pavalos
Branches: MAIN
CVS tags: DragonFly_RELEASE_1_12_Slip, DragonFly_RELEASE_1_12
Diff to: previous 1.25: preferred, unified
Changes since revision 1.25: +2 -0 lines
Fix a place where we were referencing a pointer after it had been freed.

Obtained-from: FreeBSD

Revision 1.25: download - view: text, markup, annotated - select for diffs
Sun Nov 25 17:59:22 2007 UTC (6 years, 11 months ago) by pavalos
Branches: MAIN
Diff to: previous 1.24: preferred, unified
Changes since revision 1.24: +7 -7 lines
Use symbolic constants instead of "4".
Use arrays instead of relying on struct packing.

Obtained-from: FreeBSD

Revision 1.24: download - view: text, markup, annotated - select for diffs
Sat Nov 24 23:12:51 2007 UTC (6 years, 11 months ago) by pavalos
Branches: MAIN
Diff to: previous 1.23: preferred, unified
Changes since revision 1.23: +1 -1 lines
Be consistent about "static" functions: if the function is marked
static in its prototype, mark it static at the definition too.

Obtained-from: FreeBSD

Revision 1.23: download - view: text, markup, annotated - select for diffs
Wed Nov 21 21:28:41 2007 UTC (6 years, 11 months ago) by pavalos
Branches: MAIN
Diff to: previous 1.22: preferred, unified
Changes since revision 1.22: +2 -0 lines
Check the void * argument in the AC_FOUND_DEV case against NULL.

Obtained-from: FreeBSD

Revision 1.22: download - view: text, markup, annotated - select for diffs
Sun Nov 18 17:53:01 2007 UTC (6 years, 11 months ago) by pavalos
Branches: MAIN
Diff to: previous 1.21: preferred, unified
Changes since revision 1.21: +27 -28 lines
Rewrite of the CAM error recovery code.

Some of the major changes include:

	- The SCSI error handling portion of cam_periph_error() has
	  been broken out into a number of subfunctions to better
	  modularize the code that handles the hierarchy of SCSI errors.
	  As a result, the code is now much easier to read.

	- String handling and error printing has been significantly
	  revamped.  We now use sbufs to do string formatting instead
	  of using printfs (for the kernel) and snprintf/strncat (for
	  userland) as before.

	  There is a new catchall error printing routine,
	  cam_error_print() and its string-based counterpart,
	  cam_error_string() that allow the kernel and userland
	  applications to pass in a CCB and have errors printed out
	  properly, whether or not they're SCSI errors.  Among other
	  things, this helped eliminate a fair amount of duplicate code
	  in camcontrol.

	  We now print out more information than before, including
	  the CAM status and SCSI status and the error recovery action
	  taken to remedy the problem.

Obtained-from: FreeBSD

Revision 1.21: download - view: text, markup, annotated - select for diffs
Sat Nov 17 20:28:46 2007 UTC (6 years, 11 months ago) by pavalos
Branches: MAIN
Diff to: previous 1.20: preferred, unified
Changes since revision 1.20: +1 -1 lines
Change the peripheral driver list from a linker set to module driven
driver registration.  This should allow things like da, sa, cd etc to be
in seperate KLD's to the cam core and make them preloadable.

Obtained-from: FreeBSD

Revision 1.20: download - view: text, markup, annotated - select for diffs
Tue Nov 13 00:28:27 2007 UTC (6 years, 11 months ago) by pavalos
Branches: MAIN
Diff to: previous 1.19: preferred, unified
Changes since revision 1.19: +0 -1 lines
Remove unneeded includes.

Obtained-from: FreeBSD

Revision 1.19: download - view: text, markup, annotated - select for diffs
Fri Dec 22 23:12:16 2006 UTC (7 years, 10 months ago) by swildner
Branches: MAIN
CVS tags: DragonFly_RELEASE_1_8_Slip, DragonFly_RELEASE_1_8, DragonFly_RELEASE_1_10_Slip, DragonFly_RELEASE_1_10
Diff to: previous 1.18: preferred, unified
Changes since revision 1.18: +13 -13 lines
Rename printf -> kprintf in sys/ and add some defines where necessary
(files which are used in userland, too).

Revision 1.18: download - view: text, markup, annotated - select for diffs
Wed Dec 20 18:14:34 2006 UTC (7 years, 10 months ago) by dillon
Branches: MAIN
Diff to: previous 1.17: preferred, unified
Changes since revision 1.17: +1 -1 lines
Rename sprintf  -> ksprintf
Rename snprintf -> knsprintf

Make allowances for source files that are compiled for both userland and
the kernel.

Revision 1.17: download - view: text, markup, annotated - select for diffs
Sun Sep 10 01:26:32 2006 UTC (8 years, 1 month ago) by dillon
Branches: MAIN
Diff to: previous 1.16: preferred, unified
Changes since revision 1.16: +3 -3 lines
Change the kernel dev_t, representing a pointer to a specinfo structure,
to cdev_t.  Change struct specinfo to struct cdev.  The name 'cdev' was taken
from FreeBSD.  Remove the dev_t shim for the kernel.

This commit generally removes the overloading of 'dev_t' between userland and
the kernel.

Also fix a bug in libkvm where a kernel dev_t (now cdev_t) was not being
properly converted to a userland dev_t.

Revision 1.16: download - view: text, markup, annotated - select for diffs
Tue Sep 5 03:48:07 2006 UTC (8 years, 1 month ago) by dillon
Branches: MAIN
Diff to: previous 1.15: preferred, unified
Changes since revision 1.15: +1 -1 lines
Rename malloc->kmalloc, free->kfree, and realloc->krealloc.  Pass 2

Revision 1.15: download - view: text, markup, annotated - select for diffs
Tue Sep 5 00:55:32 2006 UTC (8 years, 1 month ago) by dillon
Branches: MAIN
Diff to: previous 1.14: preferred, unified
Changes since revision 1.14: +13 -13 lines
Rename malloc->kmalloc, free->kfree, and realloc->krealloc.  Pass 1

Revision 1.14: download - view: text, markup, annotated - select for diffs
Fri Jul 28 02:17:32 2006 UTC (8 years, 3 months ago) by dillon
Branches: MAIN
Diff to: previous 1.13: preferred, unified
Changes since revision 1.13: +20 -27 lines
MASSIVE reorganization of the device operations vector.  Change cdevsw
to dev_ops.  dev_ops is a syslink-compatible operations vector structure
similar to the vop_ops structure used by vnodes.

Remove a huge number of instances where a thread pointer is still being
passed as an argument to various device ops and other related routines.
The device OPEN and IOCTL calls now take a ucred instead of a thread pointer,
and the CLOSE call no longer takes a thread pointer.

Revision 1.13: download - view: text, markup, annotated - select for diffs
Fri Feb 17 19:17:42 2006 UTC (8 years, 8 months ago) by dillon
Branches: MAIN
CVS tags: DragonFly_RELEASE_1_6_Slip, DragonFly_RELEASE_1_6
Diff to: previous 1.12: preferred, unified
Changes since revision 1.12: +2 -2 lines
Make the entire BUF/BIO system BIO-centric instead of BUF-centric.  Vnode
and device strategy routines now take a BIO and must pass that BIO to
biodone().  All code which previously managed a BUF undergoing I/O now
manages a BIO.

The new BIO-centric algorithms allow BIOs to be stacked, where each layer
represents a block translation, completion callback, or caller or device
private data.  This information is no longer overloaded within the BUF.
Translation layer linkages remain intact as a 'cache' after I/O has completed.

The VOP and DEV strategy routines no longer make assumptions as to which
translated block number applies to them.  The use the block number in the
BIO specifically passed to them.

Change the 'untranslated' constant to NOOFFSET (for bio_offset), and
(daddr_t)-1 (for bio_blkno).  Rip out all code that previously set the
translated block number to the untranslated block number to indicate
that the translation had not been made.

Rip out all the cluster linkage fields for clustered VFS and clustered
paging operations.  Clustering now occurs in a private BIO layer using
private fields within the BIO.

Reformulate the vn_strategy() and dev_dstrategy() abstraction(s).  These
routines no longer assume that bp->b_vp == the vp of the VOP operation, and
the dev_t is no longer stored in the struct buf.  Instead, only the vp passed
to vn_strategy() (and related *_strategy() routines for VFS ops), and
the dev_t passed to dev_dstrateg() (and related *_strategy() routines for
device ops) is used by the VFS or DEV code.  This will allow an arbitrary
number of translation layers in the future.

Create an independant per-BIO tracking entity, struct bio_track, which
is used to determine when I/O is in-progress on the associated device
or vnode.

NOTE: Unlike FreeBSD's BIO work, our struct BUF is still used to hold
the fields describing the data buffer, resid, and error state.

Major-testing-by: Stefan Krueger

Revision 1.12: download - view: text, markup, annotated - select for diffs
Sun Jan 22 14:03:51 2006 UTC (8 years, 9 months ago) by swildner
Branches: MAIN
Diff to: previous 1.11: preferred, unified
Changes since revision 1.11: +1 -1 lines
* Move function types to a separate line.

* Ansify function definitions.

* Remove (void) casts for discarded return values.

In collaboration with: Alexey Slynko <slynko@tronet.ru>

Revision 1.11: download - view: text, markup, annotated - select for diffs
Thu Jun 2 20:40:31 2005 UTC (9 years, 4 months ago) by dillon
Branches: MAIN
CVS tags: DragonFly_RELEASE_1_4_Slip, DragonFly_RELEASE_1_4
Diff to: previous 1.10: preferred, unified
Changes since revision 1.10: +8 -10 lines
Remove spl*() calls from the bus/ infrastructure, replacing them with
critical sections.  Remove splusb() from everywhere, replacing it with
critical sections.

Revision 1.10: download - view: text, markup, annotated - select for diffs
Wed May 19 22:52:38 2004 UTC (10 years, 5 months ago) by dillon
Branches: MAIN
CVS tags: DragonFly_Stable, DragonFly_Snap29Sep2004, DragonFly_Snap13Sep2004, DragonFly_RELEASE_1_2_Slip, DragonFly_RELEASE_1_2, DragonFly_1_0_REL, DragonFly_1_0_RC1, DragonFly_1_0A_REL
Diff to: previous 1.9: preferred, unified
Changes since revision 1.9: +5 -5 lines
Device layer rollup commit.

* cdevsw_add() is now required.  cdevsw_add() and cdevsw_remove() may specify
  a mask/match indicating the range of supported minor numbers.  Multiple
  cdevsw_add()'s using the same major number, but distinctly different
  ranges, may be issued.  All devices that failed to call cdevsw_add() before
  now do.

* cdevsw_remove() now automatically marks all devices within its supported
  range as being destroyed.

* vnode->v_rdev is no longer resolved when the vnode is created.  Instead,
  only v_udev (a newly added field) is resolved.  v_rdev is resolved when
  the vnode is opened and cleared on the last close.

* A great deal of code was making rather dubious assumptions with regards
  to the validity of devices associated with vnodes, primarily due to
  the persistence of a device structure due to being indexed by (major, minor)
  instead of by (cdevsw, major, minor).  In particular, if you run a program
  which connects to a USB device and then you pull the USB device and plug
  it back in, the vnode subsystem will continue to believe that the device
  is open when, in fact, it isn't (because it was destroyed and recreated).

  In particular, note that all the VFS mount procedures now check devices
  via v_udev instead of v_rdev prior to calling VOP_OPEN(), since v_rdev
  is NULL prior to the first open.

* The disk layer's device interaction has been rewritten.  The disk layer
  (i.e. the slice and disklabel management layer) no longer overloads
  its data onto the device structure representing the underlying physical
  disk.  Instead, the disk layer uses the new cdevsw_add() functionality
  to register its own cdevsw using the underlying device's major number,
  and simply does NOT register the underlying device's cdevsw.  No
  confusion is created because the device hash is now based on
  (cdevsw,major,minor) rather then (major,minor).

  NOTE: This also means that underlying raw disk devices may use the entire
  device minor number instead of having to reserve the bits used by the disk
  layer, and also means that can we (theoretically) stack a fully
  disklabel-supported 'disk' on top of any block device.

* The new reference counting scheme prevents this by associating a device
  with a cdevsw and disconnecting the device from its cdevsw when the cdevsw
  is removed.  Additionally, all udev2dev() lookups run through the cdevsw
  mask/match and only successfully find devices still associated with an
  active cdevsw.

* Major work on MFS:  MFS no longer shortcuts vnode and device creation.  It
  now creates a real vnode and a real device and implements real open and
  close VOPs.  Additionally, due to the disk layer changes, MFS is no longer
  limited to 255 mounts.  The new limit is 16 million.  Since MFS creates a
  real device node, mount_mfs will now create a real /dev/mfs<PID> device
  that can be read from userland (e.g. so you can dump an MFS filesystem).

* BUF AND DEVICE STRATEGY changes.  The struct buf contains a b_dev field.
  In order to properly handle stacked devices we now require that the b_dev
  field be initialized before the device strategy routine is called.  This
  required some additional work in various VFS implementations.  To enforce
  this requirement, biodone() now sets b_dev to NODEV.  The new disk layer
  will adjust b_dev before forwarding a request to the actual physical
  device.

* A bug in the ISO CD boot sequence which resulted in a panic has been fixed.

Testing by: lots of people, but David Rhodus found the most aggregious bugs.

Revision 1.9: download - view: text, markup, annotated - select for diffs
Thu May 13 23:49:11 2004 UTC (10 years, 5 months ago) by dillon
Branches: MAIN
Diff to: previous 1.8: preferred, unified
Changes since revision 1.8: +1 -1 lines
device switch 1/many: Remove d_autoq, add d_clone (where d_autoq was).

d_autoq was used to allow the device port dispatch to mix old-style synchronous
calls with new style messaging calls within a particular device.  It was never
used for that purpose.

d_clone will be more fully implemented as work continues.  We are going to
install d_port in the dev_t (struct specinfo) structure itself and d_clone
will be needed to allow devices to 'revector' the port on a minor-number
by minor-number basis, in particular allowing minor numbers to be directly
dispatched to distinct threads.  This is something we will be needing later
on.

Revision 1.8: download - view: text, markup, annotated - select for diffs
Mon Mar 15 02:27:56 2004 UTC (10 years, 7 months ago) by dillon
Branches: MAIN
Diff to: previous 1.7: preferred, unified
Changes since revision 1.7: +1 -1 lines
Do some M_WAITOK<->M_INTWAIT cleanups.  Code entered from userland, such as
device open and device ioctl, generally use M_WAITOK, while low level
structures such as the capacity structure are allocated using M_INTWAIT.

Revision 1.7: download - view: text, markup, annotated - select for diffs
Fri Mar 12 03:23:19 2004 UTC (10 years, 7 months ago) by dillon
Branches: MAIN
Diff to: previous 1.6: preferred, unified
Changes since revision 1.6: +6 -28 lines
Change M_NOWAIT to M_INTWAIT or M_WAITOK.  CAM does a mediocre job checking
for NULL returns from malloc() and even when it does it generally causes
the device operation to fail instead of retrying, resulting in unacceptable
behavior.  M_NOWAIT semantics allow NULL to be returned during normal system
operation.  This is especially true in DragonFly.

Also remove much of the code that previously checked for NULL.  By using
M_INTWAIT or M_WAITOK, malloc() will panic rather then return NULL.  Only
the addition of M_NULLOK allows a blocking malloc() to return NULL, and we
do not use that flag in CAM.

Add M_ZERO to a number of malloc()'s and remove subsequent bzero()'s, and
add M_ZERO to a few mallocs (primarily for the read capacity data structure)
that did not bother zeroing out the structure before.  While the data is
supposed to be overwritten read-capacity is often quite fragile due to the
SCSI simulation layer, so we do not take any chances.

Revision 1.6: download - view: text, markup, annotated - select for diffs
Thu Aug 7 21:16:44 2003 UTC (11 years, 2 months ago) by dillon
Branches: MAIN
Diff to: previous 1.5: preferred, unified
Changes since revision 1.5: +10 -10 lines
kernel tree reorganization stage 1: Major cvs repository work (not logged as
commits) plus a major reworking of the #include's to accomodate the
relocations.

    * CVS repository files manually moved.  Old directories left intact
      and empty (temporary).

    * Reorganize all filesystems into vfs/, most devices into dev/,
      sub-divide devices by function.

    * Begin to move device-specific architecture files to the device
      subdirs rather then throwing them all into, e.g. i386/include

    * Reorganize files related to system busses, placing the related code
      in a new bus/ directory.  Also move cam to bus/cam though this may
      not have been the best idea in retrospect.

    * Reorganize emulation code and place it in a new emulation/ directory.

    * Remove the -I- compiler option in order to allow #include file
      localization, rename all config generated X.h files to use_X.h to
      clean up the conflicts.

    * Remove /usr/src/include (or /usr/include) dependancies during the
      kernel build, beyond what is normally needed to compile helper
      programs.

    * Make config create 'machine' softlinks for architecture specific
      directories outside of the standard <arch>/include.

    * Bump the config rev.

    WARNING! after this commit /usr/include and /usr/src/sys/compile/*
    should be regenerated from scratch.

Revision 1.5: download - view: text, markup, annotated - select for diffs
Mon Jul 21 05:50:24 2003 UTC (11 years, 3 months ago) by dillon
Branches: MAIN
Diff to: previous 1.4: preferred, unified
Changes since revision 1.4: +7 -5 lines
DEV messaging stage 1/4: Rearrange struct cdevsw and add a message port
and auto-queueing mask.  The mask will tell us which message functions
can be safely queued to another thread and which still need to run in the
context of the caller.   Primary configuration fields (name, cmaj, flags,
port, autoq mask) are now at the head of the structure.  Function vectors,
which may eventually go away, are at the end.  The port and autoq fields
are non-functional in this stage.

The old BDEV device major number support has also been removed from cdevsw,
and code has been added to translate the bootdev passed from the boot code
(the boot code has always passed the now defunct block device major numbers
and we obviously need to keep that compatibility intact).

Revision 1.4: download - view: text, markup, annotated - select for diffs
Sat Jul 19 21:14:14 2003 UTC (11 years, 3 months ago) by dillon
Branches: MAIN
Diff to: previous 1.3: preferred, unified
Changes since revision 1.3: +4 -4 lines
Remove the priority part of the priority|flags argument to tsleep().  Only
flags are passed now.  The priority was a user scheduler thingy that is not
used by the LWKT subsystem.  For process statistics assume sleeps without
P_SINTR set to be disk-waits, and sleeps with it set to be normal sleeps.

This commit should not contain any operational changes.

Revision 1.3: download - view: text, markup, annotated - select for diffs
Mon Jun 23 17:55:26 2003 UTC (11 years, 4 months ago) by dillon
Branches: MAIN
CVS tags: PRE_MP
Diff to: previous 1.2: preferred, unified
Changes since revision 1.2: +4 -4 lines
proc->thread stage 2: MAJOR revamping of system calls, ucred, jail API,
and some work on the low level device interface (proc arg -> thread arg).
As -current did, I have removed p_cred and incorporated its functions
into p_ucred.  p_prison has also been moved into p_ucred and adjusted
accordingly.  The jail interface tests now uses ucreds rather then processes.

The syscall(p,uap) interface has been changed to just (uap).  This is inclusive
of the emulation code.  It makes little sense to pass a proc pointer around
which confuses the MP readability of the code, because most system call code
will only work with the current process anyway.  Note that eventually
*ALL* syscall emulation code will be moved to a kernel-protected userland
layer because it really makes no sense whatsoever to implement these
emulations in the kernel.

suser() now takes no arguments and only operates with the current process.
The process argument has been removed from suser_xxx() so it now just takes
a ucred and flags.

The sysctl interface was adjusted somewhat.

Revision 1.2: download - view: text, markup, annotated - select for diffs
Tue Jun 17 04:28:19 2003 UTC (11 years, 4 months ago) by dillon
Branches: MAIN
Diff to: previous 1.1: preferred, unified
Changes since revision 1.1: +1 -0 lines
Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids.  Most
ids have been removed from !lint sections and moved into comment sections.

Revision 1.1: download - view: text, markup, annotated - select for diffs
Tue Jun 17 02:53:53 2003 UTC (11 years, 4 months ago) by dillon
Branches: MAIN
CVS tags: FREEBSD_4_FORK
import from FreeBSD RELENG_4 1.20.2.2

Diff request

This form allows you to request diffs between any two revisions of a file. You may select a symbolic revision name using the selection box or you may type in a numeric name using the type-in text box.

Log view options