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freebsd-skq/sys/kern
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Kirk McKusick f2a2857bb3 Add snapshots to the fast filesystem. Most of the changes support 
the gating of system calls that cause modifications to the underlying
filesystem. The gating can be enabled by any filesystem that needs
to consistently suspend operations by adding the vop_stdgetwritemount
to their set of vnops. Once gating is enabled, the function
vfs_write_suspend stops all new write operations to a filesystem,
allows any filesystem modifying system calls already in progress
to complete, then sync's the filesystem to disk and returns. The
function vfs_write_resume allows the suspended write operations to
begin again. Gating is not added by default for all filesystems as
for SMP systems it adds two extra locks to such critical kernel
paths as the write system call. Thus, gating should only be added
as needed.

Details on the use and current status of snapshots in FFS can be
found in /sys/ufs/ffs/README.snapshot so for brevity and timelyness
is not included here. Unless and until you create a snapshot file,
these changes should have no effect on your system (famous last words).
2000-07-11 22:07:57 +00:00
..
bus_if.m * Factor out the object system from new-bus so that it can be used by 2000-04-08 14:17:18 +00:00
device_if.m * Factor out the object system from new-bus so that it can be used by 2000-04-08 14:17:18 +00:00
genassym.sh Use "nm | awk ..." instead of genassym(1) to generate symbol value headers. 2000-06-02 09:27:48 +00:00
imgact_aout.c Remove ~25 unneeded #include <sys/conf.h> 2000-04-19 14:58:28 +00:00
imgact_elf.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
imgact_gzip.c useracc() the prequel: 1999-10-29 18:09:36 +00:00
imgact_shell.c Fix #! script exec under linux emulation. If a script is exec'd from a 2000-04-26 20:58:40 +00:00
inflate.c Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 1999-12-29 05:07:58 +00:00
init_main.c Remove no-longer-relevant comment. 2000-06-25 10:14:06 +00:00
init_sysent.c Second of two commits adding capability manipulation syscalls for 2000-06-15 23:27:18 +00:00
kern_accf.c return of the accept filter part II 2000-06-20 01:09:23 +00:00
kern_acct.c Move the truncation code out of vn_open and into the open system call 2000-07-04 03:34:11 +00:00
kern_acl.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
kern_cap.c Introduce additional POSIX.1e-related stubs 2000-06-07 04:53:49 +00:00
kern_clock.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
kern_conf.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
kern_descrip.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
kern_environment.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
kern_event.c Report a file type (S_IFIFO) in kqueue_stat(). 2000-06-28 19:16:27 +00:00
kern_exec.c Support for unsigned integer and long sysctl variables. Update the 2000-07-05 07:46:41 +00:00
kern_exit.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
kern_fork.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
kern_intr.c Trim unused options (or #ifdef for undoc options). 1999-10-11 15:19:12 +00:00
kern_jail.c o Modify jail to limit creation of sockets to UNIX domain sockets, 2000-06-04 04:28:31 +00:00
kern_kthread.c Panic if proc0 hasn't been created and we try to call kthread_create. 2000-01-10 08:00:58 +00:00
kern_ktrace.c Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00
kern_linker.c Correct SYSINIT execution order in the case when KLD contains more 2000-07-09 23:58:56 +00:00
kern_lock.c Eliminate the undocumented, experimental, non-delivering and highly 2000-03-16 08:51:55 +00:00
kern_lockf.c Commit the remaining part of PR14914: 1999-11-16 16:28:58 +00:00
kern_malloc.c Move #ifdef to the right place. 2000-06-29 09:26:26 +00:00
kern_mib.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
kern_module.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
kern_ntptime.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
kern_physio.c Separate the struct bio related stuff out of <sys/buf.h> into 2000-05-05 09:59:14 +00:00
kern_proc.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
kern_prot.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
kern_resource.c fix a typo 2000-06-10 19:21:20 +00:00
kern_shutdown.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
kern_sig.c Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00
kern_subr.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
kern_switch.c Commit major SMP cleanups and move the BGL (big giant lock) in the 2000-03-28 07:16:37 +00:00
kern_synch.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
kern_syscalls.c Trim unused options (or #ifdef for undoc options). 1999-10-11 15:19:12 +00:00
kern_sysctl.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
kern_tc.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
kern_threads.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
kern_time.c Remove unneeded <sys/buf.h> includes. 2000-04-18 15:15:39 +00:00
kern_timeout.c Restructure TCP timeout handling: 1999-08-30 21:17:07 +00:00
kern_xxx.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
ksched.c Remove unneeded #include <sys/kernel.h> 2000-04-29 15:36:14 +00:00
link_aout.c Move the truncation code out of vn_open and into the open system call 2000-07-04 03:34:11 +00:00
link_elf_obj.c Move the truncation code out of vn_open and into the open system call 2000-07-04 03:34:11 +00:00
link_elf.c Move the truncation code out of vn_open and into the open system call 2000-07-04 03:34:11 +00:00
linker_if.m First round implementation of a fine grain enhanced module to module 2000-04-29 13:19:31 +00:00
Make.tags.inc Update tags directive to reflect the new location of soft updates 2000-07-04 00:18:43 +00:00
makedevops.pl Fix some bugs in user-end output and add a reference to the original 1999-11-22 14:40:04 +00:00
Makefile ${MACHINE} -> ${MACHINE_ARCH} 1999-11-14 13:54:44 +00:00
makeobjops.pl * Factor out the object system from new-bus so that it can be used by 2000-04-08 14:17:18 +00:00
makesyscalls.sh Fixed the calculation of sy_nargs in sysent tables. We attempted to do 2000-05-09 21:18:30 +00:00
md5c.c Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 1999-12-29 05:07:58 +00:00
p1003_1b.c Add $FreeBSD$ 2000-05-01 20:32:07 +00:00
posix4_mib.c Add $FreeBSD$. 2000-04-22 15:13:06 +00:00
subr_acl_posix1e.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
subr_autoconf.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
subr_blist.c Eliminate the undocumented, experimental, non-delivering and highly 2000-03-16 08:51:55 +00:00
subr_bus.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
subr_clist.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
subr_devstat.c Support for unsigned integer and long sysctl variables. Update the 2000-07-05 07:46:41 +00:00
subr_disk.c End two weeks of on and off debugging. Fix the crash on the Nth 2000-07-05 06:01:33 +00:00
subr_disklabel.c Separate the struct bio related stuff out of <sys/buf.h> into 2000-05-05 09:59:14 +00:00
subr_diskmbr.c Separate the struct bio related stuff out of <sys/buf.h> into 2000-05-05 09:59:14 +00:00
subr_diskslice.c Separate the struct bio related stuff out of <sys/buf.h> into 2000-05-05 09:59:14 +00:00
subr_eventhandler.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
subr_kobj.c * Move the driver_t::refs field to kobj_t to replace kobj_t::instances. 2000-05-01 10:45:15 +00:00
subr_log.c Remove five now unused fields from struct cdevsw. They should never 1999-09-25 18:24:47 +00:00
subr_module.c Trim unused options (or #ifdef for undoc options). 1999-10-11 15:19:12 +00:00
subr_param.c Move the MSG* and SEM* options to opt_sysvipc.h 2000-05-01 13:33:56 +00:00
subr_prf.c Do not fault if curproc is null. 2000-04-29 11:32:15 +00:00
subr_prof.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
subr_rman.c Replace all the ifdef debugging spaghetti with a single ifdef and 2000-05-03 00:20:36 +00:00
subr_scanf.c Change the prototype of the strto* routines to make the second 1999-11-24 01:03:08 +00:00
subr_smp.c Further fixes for multiple-IO-APIC systems from Tor Egge: 2000-05-31 21:37:28 +00:00
subr_taskqueue.c Add taskqueue system for easy-to-use SWIs among other things. 2000-05-28 15:45:30 +00:00
subr_trap.c Fix my own style bugs (use of spaces instead of tabs for indentation). 2000-07-01 02:40:13 +00:00
subr_xxx.c Remove five now unused fields from struct cdevsw. They should never 1999-09-25 18:24:47 +00:00
sys_generic.c Remove two micro-pessimizations I made. Bruce is teaching me well :) 2000-07-07 22:11:37 +00:00
sys_pipe.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
sys_process.c Introduce the new function 1999-11-21 19:03:20 +00:00
sys_socket.c Instead of just blindly setting -rw-rw-rw-: 2000-07-02 23:56:45 +00:00
syscalls.c Second of two commits adding capability manipulation syscalls for 2000-06-15 23:27:18 +00:00
syscalls.master Introduce syscalls for process capability manipulation. Currently backs 2000-06-15 23:08:17 +00:00
sysv_ipc.c Remove the undocumented, flawed, broken-as-designed semconfig() syscall. 2000-05-01 11:13:41 +00:00
sysv_msg.c Move the MSG* and SEM* options to opt_sysvipc.h 2000-05-01 13:33:56 +00:00
sysv_sem.c Move the MSG* and SEM* options to opt_sysvipc.h 2000-05-01 13:33:56 +00:00
sysv_shm.c This is a cleanup patch to Peter's new OBJT_PHYS VM object type 2000-05-29 22:40:54 +00:00
tty_compat.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
tty_conf.c Don't refer to TABLDISC in the comments here. 2000-01-30 10:14:13 +00:00
tty_cons.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
tty_pty.c Unused include: #include "pty.h" 2000-06-10 07:12:40 +00:00
tty_snoop.c Unstaticize this driver. You can have as many snoop devices as you can 2000-04-02 00:35:37 +00:00
tty_subr.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
tty_tty.c Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00
tty.c Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
uipc_accf.c return of the accept filter part II 2000-06-20 01:09:23 +00:00
uipc_domain.c $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
uipc_mbuf2.c sync with kame tree as of july00. tons of bug fixes/improvements. 2000-07-04 16:35:15 +00:00
uipc_mbuf.c sync with kame tree as of july00. tons of bug fixes/improvements. 2000-07-04 16:35:15 +00:00
uipc_proto.c Trim unused options (or #ifdef for undoc options). 1999-10-11 15:19:12 +00:00
uipc_sockbuf.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
uipc_socket2.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
uipc_socket.c fix races in the uidinfo subsystem, several problems existed: 2000-06-22 22:27:16 +00:00
uipc_syscalls.c Modify ktrace's general I/O tracing, ktrgenio(), to use a struct uio * 2000-07-02 08:08:09 +00:00
uipc_usrreq.c Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00
vfs_acl.c Remove unneeded #include <vm/vm_zone.h> 2000-04-30 18:52:11 +00:00
vfs_aio.c Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
vfs_bio.c Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00
vfs_cache.c Support for unsigned integer and long sysctl variables. Update the 2000-07-05 07:46:41 +00:00
vfs_cluster.c Virtualizes & untangles the bioops operations vector. 2000-06-16 08:48:51 +00:00
vfs_conf.c Make a trip to Pointy-Hats-R-Us and actually include the header that 2000-05-22 17:25:47 +00:00
vfs_default.c Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00
vfs_export.c Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00
vfs_extattr.c Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00
vfs_init.c The sysctl mod_xx hack is no longer required now that we have totally 1999-12-12 16:30:34 +00:00
vfs_lookup.c Introduce NDFREE (and remove VOP_ABORTOP) 1999-12-15 23:02:35 +00:00
vfs_mount.c Make a trip to Pointy-Hats-R-Us and actually include the header that 2000-05-22 17:25:47 +00:00
vfs_subr.c Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00
vfs_syscalls.c Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00
vfs_vnops.c Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00
vnode_if.pl remove crufty exec stuff, perl is in the base system 2000-06-27 19:09:55 +00:00
vnode_if.src Add snapshots to the fast filesystem. Most of the changes support 2000-07-11 22:07:57 +00:00