returns errno, because errno can be mucked by user's signal handler and
most of pthread api heavily depends on errno to be correct, this change
should improve stability of the thread library.
given pmap is never NULL, and therefore pmap_pml4e() can never return
NULL. The pervasive use of these inline functions throughout the pmap
makes these simple changes worthwhile.
to trip a bug causing the latter to return a zeroed struct
aac_adapter_info. This causes two issues. One is cosmetic only --
a verbose boot prints information about the controller, and shows all
zero:
aac0: Unknown processor 0MHz, 0MB memory (0MB cache, 0MB execution),
unknown battery platform
The second problem is that the firmware version information is stored
away for aac_rev_check, for userland tools (like aaccli) to query via
the FSACTL_MINIPORT_REV_CHECK and FSACTL_LNX_MINIPORT_REV_CHECK ioctls.
When aaccli encounters this issue it prints
Command Error: <The current AFAAPI.DLL is too old to work with the
current controller software.>
Move the RequestSupplementAdapterInfo call after RequestAdapterInfo,
which seems to fix both problems.
These functions try the specified operation (rlocking and wlocking) and
true is returned if the operation completes, false otherwise.
The KPI is enriched by this commit, so __FreeBSD_version bumping and
manpage updating will happen soon.
Requested by: jeff, kris
abstraction as the RAID and CAM modules, making it nearly impossible
for enough initialization to be done in time for the RAID module to
know whether to attach. On top of this, no reset was being done on
the controller on attach, in violation of the spec. Additionally,
the port enable step was being deferred to the end of the attach
process, long after it should have been done to ensure reliable
operation from the controller. Fix all of these with a few hacks
to force the "attach" and "enable" steps of the core module early
on, and ensure that a reset and port enable also happens early on.
In the future, the driver needs to be refactored to eliminate the
core module abstraction, clean up withe reset/enable steps, and
defer event messages until all of the modules are available to
recieve them.
o mark cmds/parameters to indicate they are potential arguments to a clone
operation (e.g. vlantag)
o when handling a create/clone operation do the callback on seeing the first
non-clone cmd line argument so the new device is created and can be used;
and re-setup operating state to reflect the newly created device
Reviewed by: Eugene Grosbein
MFC after: 2 weeks
openat(2), faccessat(2), fchmodat(2), fchownat(2), fstatat(2),
futimesat(2), linkat(2), mkdirat(2), mkfifoat(2), mknodat(2),
readlinkat(2), renameat(2), symlinkat(2)
syscalls.
Based on the submission by rdivacky,
sponsored by Google Summer of Code 2007
Reviewed by: rwatson, rdivacky
Tested by: pho
openat() and the related syscalls.
Based on the submission by rdivacky,
sponsored by Google Summer of Code 2007
Reviewed by: rwatson, rdivacky
Tested by: pho
to protect the v_lock pointer. Removing the interlock acquisition
here allows vn_lock() to proceed without requiring the interlock
at all.
- If the lock mutated while we were sleeping on it the interlock has
been dropped. It is conceivable that the upper layer code was
relying on the interlock and LK_NOWAIT to protect the identity or
state of the vnode while acquiring the lock. In this case return
EBUSY rather than trying the new lock to prevent potential races.
Reviewed by: tegge
Keeping the lockmgr lock valid allows us to switch the v_lock pointer
in snapshot vnodes between the embedded lockmgr lock and snapdata
lock without needing the vnode interlock to protect against races
- Keep unused snapdata structures in a list.
- Add a function to lock the devvp and allocate a snapdata to it or
acquire a new one without races. The old function was safe from
creation races because we set the mount flag when creating snapshots
and thus serializing them. However, it might have been subject to
destroying races.
Reviewed by: tegge
