fd: remove filedesc argument from fdclose

Just accept a thread instead. This makes it consistent with fdalloc.

No functional changes.

Merge from HEAD

MFH: r278968-r280640

Sponsored by: The FreeBSD Foundation

cred: add proc_set_cred_init helper

proc_set_cred_init can be used to set first credentials of a new
process.

Update proc_set_cred assertions so that it only expects already used
processes.

This f

cred: add proc_set_cred_init helper

proc_set_cred_init can be used to set first credentials of a new
process.

Update proc_set_cred assertions so that it only expects already used
processes.

This fixes panics where p_ucred of a new process happens to be non-NULL.

Reviewed by: kib

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fork: assign refed credentials earlier

Prior to this change the kernel would take p1's credentials and assign
them tempororarily to p2. But p1 could change credentials at that time
and in effect giv

fork: assign refed credentials earlier

Prior to this change the kernel would take p1's credentials and assign
them tempororarily to p2. But p1 could change credentials at that time
and in effect give us a use-after-free.

No objections from: kib

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Merge r278538 through r280226.

Merge from head

cred: add proc_set_cred helper

The goal here is to provide one place altering process credentials.

This eases debugging and opens up posibilities to do additional work when such
an action is perfor

cred: add proc_set_cred helper

The goal here is to provide one place altering process credentials.

This eases debugging and opens up posibilities to do additional work when such
an action is performed.

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MFhead @ r277403

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Add procctl(2) PROC_TRACE_CTL command to enable or disable debugger
attachment to the process. Note that the command is not intended to
be a security measure, rather it is an obfuscation feature,
im

Add procctl(2) PROC_TRACE_CTL command to enable or disable debugger
attachment to the process. Note that the command is not intended to
be a security measure, rather it is an obfuscation feature,
implemented for parity with other operating systems.

Discussed with: jilles, rwatson
Man page fixes by: rwatson
Sponsored by: The FreeBSD Foundation
MFC after: 1 week

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Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

MFhead @ r275911 (also, sort out MK_* flags in BMAKE, etc on this branch)

Merge ^/head r275759 through r275911.

Add a facility for non-init process to declare itself the reaper of
the orphaned descendants. Base of the API is modelled after the same
feature from the DragonFlyBSD.

Requested by: bapt
Reviewed b

Add a facility for non-init process to declare itself the reaper of
the orphaned descendants. Base of the API is modelled after the same
feature from the DragonFlyBSD.

Requested by: bapt
Reviewed by: jilles (previous version)
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks

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Merge ^/head r275715 through r275748.

Add facility to stop all userspace processes. The supposed use of the
feature is to quisce the system before suspend.

Stop is implemented by reusing the thread_single(9) with the special
mode SINGL

Add facility to stop all userspace processes. The supposed use of the
feature is to quisce the system before suspend.

Stop is implemented by reusing the thread_single(9) with the special
mode SINGLE_ALLPROC. SINGLE_ALLPROC differs from the existing
single-threading modes by allowing (requiring) caller to operate on
other process. Interruptible sleeps for !TDF_SBDRY threads are
suspended like SIGSTOP does it, instead of aborting the sleep, like
SINGLE_NO_EXIT, to avoid spurious EINTRs on resume.

Provide debugging sysctl debug.stop_all_proc, which causes total stop
and suspends syncer, while waiting for variable reset for resume. It
is used for debugging; should be removed after the real use of the
interface is added.

In collaboration with: pho
Discussed with: avg
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks

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Sync to HEAD@r274766

Merge from head@274682

filedesc: fixup fdinit to lock fdp and preapare files conditinally

Not all consumers providing fdp to copy from want files.

Perhaps these functions should be reorganized to better express the outco

filedesc: fixup fdinit to lock fdp and preapare files conditinally

Not all consumers providing fdp to copy from want files.

Perhaps these functions should be reorganized to better express the outcome.

This fixes up panics after r273895 .

Reported by: markj

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IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Merge head from 7/28

Sync to HEAD@r269943.

Make fdunshare accept only td parameter.

Proc had to match the thread anyway and 2 parameters were inconsistent
with the rest.

MFC after: 1 week

Merge head