git: kernel - Make numerous proc accesses use p->p_token instead
commit 58c2553a79a1ecfcbfd3ab0cb8e383052af37406
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Sun Feb 13 20:57:32 2011 -0800
kernel - Make numerous proc accesses use p->p_token instead of proc_token.
* pfind() zpfind() now returns a referenced proc structure, callers must
release the proc with PRELE(). Callers no longer need to hold proc_token
for stable access.
* Enhance pgrp, adding pgrp->pg_token and pgrp->pg_refs in addition to
pgrp->pg_lock. The lock is used to interlock races between fork() and
signals while the token and refs are used to control access.
* Add pfindn(), a version of pfind() which does not ref the returned proc.
Some code still uses it (linux emulation) ---> needs work.
* Add pgref() and pgrel() to mess with the pgrp's pg_refs. pgrel()
automatically destroys the pgrp when the last reference goes away.
* Most process group operations now use the per-process token instead of
proc_token, though pgfind() still needs it temporarily.
* pgfind() now returns a referenced pgrp or NULL.
* Interlock signal handling with p->p_token instead of proc_token.
* Adjust most nice/priority functions to use the per-process token.
* Add protective PHOLD()s in various places in the signal code, the
ptrace code, and procfs.
* Change funsetown() to take the address of the sigio pointer to match
fsetown(), add sanity assertions.
* pgrp's in tty sessions are now ref-counted.
Summary of changes:
sys/dev/drm/drm_drv.c | 2 +-
sys/dev/misc/syscons/scmouse.c | 21 ++-
sys/dev/misc/syscons/syscons.c | 6 +-
sys/emulation/linux/i386/linprocfs/linprocfs.h | 2 +-
.../linux/i386/linprocfs/linprocfs_vnops.c | 36 +++--
sys/emulation/linux/i386/linux_machdep.c | 6 +-
sys/emulation/linux/i386/linux_ptrace.c | 6 +
sys/emulation/linux/linux_futex.c | 4 +-
sys/emulation/linux/linux_misc.c | 4 +
sys/emulation/linux/linux_signal.c | 1 -
sys/kern/init_main.c | 8 +-
sys/kern/kern_descrip.c | 73 ++++++---
sys/kern/kern_event.c | 11 +-
sys/kern/kern_exit.c | 24 ++-
sys/kern/kern_fork.c | 20 ++-
sys/kern/kern_ktrace.c | 9 +-
sys/kern/kern_p1003_1b.c | 16 ++-
sys/kern/kern_proc.c | 129 ++++++++++++----
sys/kern/kern_prot.c | 42 ++++--
sys/kern/kern_resource.c | 163 ++++++++++++--------
sys/kern/kern_sig.c | 38 ++++-
sys/kern/subr_log.c | 2 +-
sys/kern/sys_pipe.c | 2 +-
sys/kern/sys_process.c | 28 ++++
sys/kern/tty.c | 30 +++-
sys/kern/uipc_socket.c | 2 +-
sys/kern/uipc_syscalls.c | 3 +-
sys/net/bpf.c | 2 +-
sys/net/tap/if_tap.c | 4 +-
sys/net/tun/if_tun.c | 2 +-
sys/platform/pc32/i386/db_trace.c | 2 +-
sys/sys/filedesc.h | 5 +-
sys/sys/proc.h | 17 ++-
sys/vfs/procfs/procfs.h | 2 -
sys/vfs/procfs/procfs_ctl.c | 4 +-
sys/vfs/procfs/procfs_subr.c | 4 +-
sys/vfs/procfs/procfs_vnops.c | 130 +++++++++++-----
37 files changed, 607 insertions(+), 253 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/58c2553a79a1ecfcbfd3ab0cb8e383052af37406
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