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Remove support for mcd and scd - these were old proprietary ISA cdrom interfaces that haven't been in the build for ages.
Include <diskslice.h> for DIOCGPART. This fixes the LINT build.
Continue untangling the disklabel. Reorganize struct partinfo and the DIOCGPART ioctl to extract the required information directly, and fix the DIOCGPART ioctl direction so userland can use it. This removes numerous disklabel references, particularly from the filesystem code which was doing silly indirections just to figure out the sector size. NOTE: The absolute byte offset of the slice or partition (relative to the base of the raw disk) is also made available, but is not currently used by the kernel.
Start untangling the disklabel from various bits of code with the goal of introducing support for a new 64 bit disklabel. Remove the D_* flags for disklabel.d_flags. These sorts of flags just do not belong in the disk image. Relabel the partition sub-structure in disktab.h, and remove other ancient compatibility defines in disklabel.h.
Rename printf -> kprintf in sys/ and add some defines where necessary (files which are used in userland, too).
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.
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.
Replace the the buffer cache's B_READ, B_WRITE, B_FORMAT, and B_FREEBUF b_flags with a separate b_cmd field. Use b_cmd to test for I/O completion as well (getting rid of B_DONE in the process). This further simplifies the setup required to issue a buffer cache I/O. Remove a redundant header file, bus/isa/i386/isa_dma.h and merge any discrepancies into bus/isa/isavar.h. Give ISADMA_READ/WRITE/RAW their own independant flag definitions instead of trying to overload them on top of B_READ, B_WRITE, and B_RAW. Add a routine isa_dmabp() which takes a struct buf pointer and returns the ISA dma flags associated with the operation. Remove the 'clear_modify' argument to vfs_busy_pages(). Instead, vfs_busy_pages() asserts that the buffer's b_cmd is valid and then uses it to determine the action it must take.
struct buf's b_bcount field has been changed from long to int. Adjust printf() formats accordingly to silence compiler warnings.
Major BUF/BIO work commit. Make I/O BIO-centric and specify the disk or file location with a 64 bit offset instead of a 32 bit block number. * All I/O is now BIO-centric instead of BUF-centric. * File/Disk addresses universally use a 64 bit bio_offset now. bio_blkno no longer exists. * Stackable BIO's hold disk offset translations. Translations are no longer overloaded onto a single structure (BUF or BIO). * bio_offset == NOOFFSET is now universally used to indicate that a translation has not been made. The old (blkno == lblkno) junk has all been removed. * There is no longer a distinction between logical I/O and physical I/O. * All driver BUFQs have been converted to BIOQs. * BMAP, FREEBLKS, getblk, bread, breadn, bwrite, inmem, cluster_*, and findblk all now take and/or return 64 bit byte offsets instead of block numbers. Note that BMAP now returns a byte range for the before and after variables.
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
unbreak LINT building
Major cleanup of the interrupt registration subsystem. * Collapse the separate registrations in the kernel interrupt thread and i386 layers into a single machine-independant kernel interrupt thread layer in kern/kern_intr.c. Get rid of the i386 layer's 'MUX' code entirely. * Have the interrupt vector assembly code (icu_vector.s and apic_vector.s) call a machine-independant function in the kernel interrupt thread layer to figure out how to process an interrupt. * Move a lot of assembly into the new C interrupt processing function. * Add support for INTR_MPSAFE. If a device driver registers an interrupt as being MPSAFE, the Big Giant Lock will not be obtained or required. * Temporarily just schedule the ithread if a FAST interrupt cannot be executed due to its serializer being locked. * Add LWKT serialization support for a non-blocking 'try' function. * Get rid of ointhand2_t and adjust all old ISA code to use inthand2_t. * Supply a frame pointer as a pointer rather then embedding it on th stack. * Allow FAST and SLOW interrupts to be mixed on the same IRQ, though this will not necessarily result in optimal operation. * Remove direct APIC/ICU vector calls from the apic/icu vector assembly code. Everything goes through the new routine in kern/kern_intr.c now. * Add a new flag, INTR_NOPOLL. Interrupts registered with the flag will not be polled by the upcoming emergency general interrupt polling sysctl (e.g. ATA cannot be safely polled due to the way ATA register access interferes with ATA DMA). * Remove most of the distinction in the i386 assembly layers between FAST and SLOW interrupts (part 1/2). * Revamp the interrupt name array returned to userland to list multiple drivers associated with the same IRQ.
convert spl* to critical sections
timeout/untimeout ==> callout_*
timeout/untimeout ==> callout_*
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.
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.
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.
LINT pass. Cleanup missed proc->thread conversions and get rid of warnings.
LINT build test. Aggregated source code adjustments to bring most of the rest of the kernel source up to date, using the LINT build.
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).
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.
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.
import from FreeBSD RELENG_4 1.115