To reduce the diff struct pcu.cnt field was not renamed, so
PCPU_OP(cnt.field) is still used. pc_cnt and pcpu are also used in
kvm(3) and vmstat(8). The goal was to not affect externally used KPI.
Bump __FreeBSD_version_ in case some out-of-tree module/code relies on the
the global cnt variable.
Exp-run revealed no ports using it directly.
No objection from: arch@
Sponsored by: EMC / Isilon Storage Division
ext2fs: minor update to the dirpref policy.
The change in UFS r254996, reverted the change as the
older code seems to work better. This was not visible
in local testing but we can trust UFS is vastly more
exercised in diferent environments.
Bring in a minor change to the dirpref policy based on r248623.
This is pretty minimal change to keep the implementation in
sync with UFS but other parts from the original change are not
directly applicable so don't expect improvements in fsck times.
MFC after: 2 weeks
further refinement is required as some device drivers intended to be
portable over FreeBSD versions rely on __FreeBSD_version to decide whether
to include capability.h.
MFC after: 3 weeks
lookup cookies to be less obscure.
No functional change.
Since r245115, cnt has not really been needed in tmpfs_dir_getdents(). Keep
it for the MPASS() for now though.
Sponsored by: EMC / Isilon Storage Division
MFC after: 2 weeks
Consistently use a single tab after a #define as mentioned in style(9).
Use tabs instead of space for indenting.
Fix a typo: "hash_vesion".
No functional change.
MFC after: 3 days
The ext4 developers tend to tag Ext4-specific flags as
"incompatible" even when such features are not relevant for
read-only support. This is a consequence of the process
though which this filesystem is implemented without design
and the fact that some new features are not extensible to
ext2/3.
Organize the features according to what we support and sort
them so that we can now read-only mount filesystems with
some features that may be found in newly formatted ext4 fs.
Submitted by: Zheng Liu
Reviewed by: pfg
MFC after: 5 days
The ext4 inode flags do not have equivalents for chflags (1)
and hold information that is private to the implementation.
The i_flag field in the inode is a better place to hold the Ext4
inode flags as it saves us from masking flags while setting or
getting attributes. It should also make things cleaner if we
implement write support for Ext4.
Suggested by: bde
Tested by: Mike Ma
MFC after: 3 days
The IN_* flags should be set in i_flag instead of corrupting
i_flags [1].
Re-enable HTree dirindex as the last series of bug fixes
seems to have fixed the issues.
Reported by: bde [1]
Tested by: kevlo
MFC after: 1 week
Use the bitwise negation instead of bogus boolean negation and move
the flag manipulation with the assignment.
Fix some grammatical errors introduced in the same change.
Reported by: bde
MFC after: 3 days
r260545 cleared the inode flags to fix corruption problems but
we still need to pass some EXT4 flags for the ext4 read-only
mode. None of these attributes has an equivalent in FreeBSD and
are uninteresting for the system utilities so they should be
innaccessible in ext2_getattrib().
Note: we also use EXT4_HUGE_FILE but we use it directly from the
dinode structure so it is not necessary to translate it,
Suggested by: bde
MFC after: 3 days
After r252890 we are naively attempting to pass through the
inode flags. This is technically incorrect as the ext2
inode flags don't match the UFS/system values used in
FreeBSD and a clean conversion is needed.
Some filtering was left in place so the change didn't cause
significant changes in FreeBSD but some of the garbage passed
is likely to be the cause for warning messages in linux.
Fix the issue by resetting the flags before conversion as was
done previously. This also means we will not pass the EXT4_*
inode flags into FreeBSD's inode.
PR: kern/185448
MFC after: 3 days
- Introduce additional hash to group requests by hash of sockref. This
allows to process TCP acknowledgements without looping though all the cache,
and as result allows to do it every time.
- Indroduce additional callbacks to notify application layer about sockets
disconnection. Without this last few requests processed just before socket
disconnection never processed their ACKs and stuck in cache for many hours.
- Implement transport-specific method for tracking reply acknowledgements.
New implementation does not cross multiple stack layers to get the data and
does not have race conditions that previously made some requests stuck
in cache. This could be done more efficiently at sockbuf layer, but that
would broke some KBIs, while I don't know other consumers for it aside NFS.
- Instead of traversing all DRC twice per request, run cleaning only once
per request, and except in some conditions traverse only single hash slot
at a time.
Together this limits NFS DRC growth only to situations of real connectivity
problems. If network is working well, and so all replies are acknowledged,
cache remains almost empty even after hours of heavy load. Without this
change on the same test cache was growing to many thousand requests even
with perfectly working local network.
As another result this reduces CPU time spent on the DRC handling during
SPEC NFS benchmark from about 10% to 0.5%.
Sponsored by: iXsystems, Inc.
- Do not update the histogram for items we are any way deleting from cache.
- Do not update the histogram if nfsrc_tcphighwater is not set.
- Remove some extra math operations.
when a Getattr for a file is done by a client other than the one that
holds the file's delegation. This would only happen when delegations
are enabled and the problem is fixed by this patch.
MFC after: 1 week
reported to the freebsd-fs mailing list. I believe the problem was
caused by the Readdir operation using VFS_VGET() for a snapshot file entry
instead of VOP_LOOKUP(). This would not occur for NFSv3, since it
will do a VFS_VGET() of "." which fails with ENOTSUPP at the beginning
of the directory, whereas NFSv4 does not check "." or "..". This
patch adds a call to VFS_VGET() for the directory being read to check
for ENOTSUPP.
I also observed that the mount_on_fileid and fsid attributes were
not correct at the snapshot's auto mountpoints when looking at packet
traces for the Readdir. This patch fixes the attributes by doing a check
for different v_mount structure, even if the vnode v_mountedhere is not
set.
Reported by: jas@cse.yorku.ca
Tested by: jas@cse.yorku.ca
Reviewed by: asomers
MFC after: 1 week
nfsv4_fillattr() as NULLs for the Getattr callback. This caused
nfsv4_fillattr() to not fill in the Change attribute for the reply.
I believe this was a violation of the RFC, but had little effect on
server behaviour. This patch passes a non-NULL p argument to fix this.
MFC after: 1 week
for the Getattr and Recall callbacks. This patch fixes it.
Since the NFSv4.1 specific error codes would only happen for
abnormal circumstances, this patch has little effect, in practice.
MFC after: 1 week
Instead of taking 8 specific bytes of file handle to identify file during
RPC thread affitinity handling, use trivial hash of the full file handle.
ZFS's struct zfid_short does not have padding field after the length field,
as result, originally picked 8 bytes are loosing lower 16 bits of object ID,
causing many false matches and unneeded requests affinity to same thread.
This fix substantially improves NFS server latency and scalability in SPEC
NFS benchmark by more flexible use of multiple NFS threads.
Sponsored by: iXsystems, Inc.
Besides not making sense, open(O_EXEC) for fifo creates fifoinfo with
zero readers and writers counts, which causes premature free of pipes.
Reported and tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Historically creation of device aliases created symbolic links using only
name of target device as a link target, not considering current directory.
Fix that by adding number of "../" chunks to the terget device name,
required to get out of the current directory to devfs root first.
MFC after: 1 month
synchronous (with FILE_SYNC) writes because non-contiguous
byte ranges in the same buffer cache block are being
written. This patch adds a new mount option "noncontigwr"
which allows the non-contiguous byte ranges to be combined,
with the dirty byte range becoming the superset of the bytes
that are dirty, if the file has not been file locked.
This reduces the number of writes significantly for software
builds. The only case where this change might break existing
applications is where an application is writing
non-overlapping byte ranges within the same buffer cache block
of a file from multiple clients concurrently.
Since such an application would normally do file locking on
the file, avoiding the byte range merge for files that have
been file locked should be sufficient for most (maybe all?) cases.
Submitted by: jhb (earlier version)
Reviewed by: kib
MFC after: 3 weeks
According to online documentation [1], Ext4 has two new "special"
inodes so add the new exclude and replica inodes.
Reference:
[1] https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout
Reported by: Mike Ma
MFC after: 3 weeks
option, unbreak the lock tracing release semantic by embedding
calls to LOCKSTAT_PROFILE_RELEASE_LOCK() direclty in the inlined
version of the releasing functions for mutex, rwlock and sxlock.
Failing to do so skips the lockstat_probe_func invokation for
unlocking.
- As part of the LOCKSTAT support is inlined in mutex operation, for
kernel compiled without lock debugging options, potentially every
consumer must be compiled including opt_kdtrace.h.
Fix this by moving KDTRACE_HOOKS into opt_global.h and remove the
dependency by opt_kdtrace.h for all files, as now only KDTRACE_FRAMES
is linked there and it is only used as a compile-time stub [0].
[0] immediately shows some new bug as DTRACE-derived support for debug
in sfxge is broken and it was never really tested. As it was not
including correctly opt_kdtrace.h before it was never enabled so it
was kept broken for a while. Fix this by using a protection stub,
leaving sfxge driver authors the responsibility for fixing it
appropriately [1].
Sponsored by: EMC / Isilon storage division
Discussed with: rstone
[0] Reported by: rstone
[1] Discussed with: philip
compiler interprets this as an undefined behaviour. Instead, ensure
that the sum of uio_offset and uio_resid is below OFF_MAX using the
operation which cannot overflow.
Reported and tested by: pho
Discussed with: bde
Approved by: des (pseudofs maintainer)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
sources from uio. Both uio_offset and offset, and uio_resid and resid
have the same types for some time.
Add check for buflen overflow by comparing the buflen with both offset
and resid (vs. comparing with offset only, as it is currently done).
Reported and tested by: pho
Approved by: des (pseudofs maintainer)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
The hang occurred in nfsv4_setsequence() when it couldn't find an
available session slot and is fixed by checking for a forced dismount
in progress and just returning for this case.
MFC after: 1 month
CLNT_CONTROL() would be called on "client" after it was
released via CLNT_RELEASE(). It was unlikely that this
code path gets executed and I have not heard of any problem
report caused by this bug. This patch fixes the code so that
this cannot happen.
MFC after: 2 months
to this event, adding if_var.h to files that do need it. Also, include
all includes that now are included due to implicit pollution via if_var.h
Sponsored by: Netflix
Sponsored by: Nginx, Inc.
di_extsize is the EA size and as such it should be unsigned.
Adjust related types for consistency.
Reviewed by: mckusick (previous version)
MFC after: 3 weeks
devfs_iosize_max_clamp sysctl, which allows/disables SSIZE_MAX-sized
i/o requests on the devfs files.
Sponsored by: The FreeBSD Foundation
Reminded by: Dmitry Sivachenko <trtrmitya@gmail.com>
MFC after: 1 week
The kernel normally didn't unmap/context switch away before we accessed
the buffer most of the time, but under heavy I/O pressure and lots of
mount/unmounting this would cause a fault on nofault panic...
Reviewed by: dteske
Approved by: re (kib)
Sponsored by: Vicor
MFC after: 3 days
transmission which could be tricked into rounding up to the nearest
page size, leaking up to a page of kernel memory. [13:11]
In IPv6 and NetATM, stop SIOCSIFADDR, SIOCSIFBRDADDR, SIOCSIFDSTADDR
and SIOCSIFNETMASK at the socket layer rather than pass them on to the
link layer without validation or credential checks. [SA-13:12]
Prevent cross-mount hardlinks between different nullfs mounts of the
same underlying filesystem. [SA-13:13]
Security: CVE-2013-5666
Security: FreeBSD-SA-13:11.sendfile
Security: CVE-2013-5691
Security: FreeBSD-SA-13:12.ifioctl
Security: CVE-2013-5710
Security: FreeBSD-SA-13:13.nullfs
Approved by: re
