On amd64, don't abort promotion due to a missing accessed bit in a
mapping before possibly write protecting that mapping. Previously,
in some cases, we might not repromote after madvise(MADV_FREE) because
there was no write fault to trigger the repromotion. Conversely, on
arm64, don't pointlessly, yet harmlessly, write protect physical pages
that aren't part of the physical superpage.
Don't count aborted promotions due to explicit promotion prohibition
(arm64) or hardware errata (amd64) as ordinary promotion failures.
Reviewed by: kib, markj
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D36916
Changing the mode bits on a file with an NFS4 ACL results in the
NFS4 ACL being replaced by one matching the new mode bits being set,
so when restoring a file with an NFS4 ACL, set the owner/group/mode first
and then set the NFS4 ACL, so that setting the mode does not throw away
the ACL that we just set.
Reviewed by: mckusick
Differential Revision: https://reviews.freebsd.org/D37618
Instead of providing no /usr/bin/objdump when LLVM_BINUTILS is false.
PR: 267854 [exp-run]
Reviewed by: dim
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D37445
Reverting because of issue in Makefile.inc1 during native builds:
make[1]: “.../freebsd/Makefile.inc1" line 163: Unknown target aarch64:aarch64.
Since I only tested this patch with make universe on amd64, this issue wasn't caught.
This reverts commit 83bf6ab568.
A comment at the beginning of the function notes that we may be
transmitting multiple fragments as distinct packets. So, the function
loops over all fragments, transmitting each mbuf chain. If if_transmit
fails, we need to free all of the fragments, but m_freem() only frees an
mbuf chain - it doesn't follow m_nextpkt.
Change the error handler to free each untransmitted packet fragment, and
count each fragment as a separate error since we increment OPACKETS once
per fragment when transmission is successful.
Reviewed by: zlei, kp
MFC after: 1 week
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D37635
Otherwise, if multiple object files contain references to the same
probe, newish lld will refuse to link them by default, raising a
duplicate global symbol definition error. Previously, duplicate global
symbols with identical absolute st_values were permitted by both lld and
GNU ld.
Since dtrace has no use for probe function symbols after the relocation
performed by dtrace -G, make the symbols weak as well, following a
suggestion from MaskRay.
Reported by: dim
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
On powerpc64, powerpc64le and riscv64 some software wrongly assumes that
it runs on powerpc or riscv (32-bit).
Differential revision: https://reviews.freebsd.org/D35962
Approved by: alfredo, imp
When the lower filesystem directory hierarchy is the same as the nullfs
mount point (admittedly not likely to be a useful situation in
practice), nullfs is subject to the exact deadlock between the busy
count drain and the covered vnode lock that VV_CROSSLOCK is intended
to address.
Reviewed by: kib
Tested by: pho
Differential Revision: https://reviews.freebsd.org/D37458
When taking the covered vnode lock during mount and unmount operations,
specify LK_CANRECURSE as the existing lock state of the covered vnode
is not guaranteed (AFAIK) either by assertion or documentation for
these code paths.
For the mount path, this is done only for completeness as the covered
vnode lock is not currently held when VFS_MOUNT() is called.
For the unmount path, the covered vnode is currently held across
VFS_UNMOUNT(), and the existing code only happens to work when unionfs
is mounted atop FFS because FFS sets LO_RECURSABLE on its vnode locks.
This of course doesn't cover a hypothetical case in which the covered
vnode may be held shared, but for the mount and unmount paths such a
scenario seems unlikely to materialize.
Reviewed by: kib
Tested by: pho
Differential Revision: https://reviews.freebsd.org/D37458
When VV_CROSSLOCK is present, the lock for the vnode at the current
stage of lookup must be held across the VFS_ROOT() call for the
filesystem mounted at the vnode. Since VV_CROSSLOCK implies that
the root vnode reuses the already-held lock, the possibility for
recursion should be made clear in the flags passed to VFS_ROOT().
For cases in which the lock is held exclusive, this means passing
LK_CANRECURSE. For cases in which the lock is held shared, it
means clearing LK_NODDLKTREAT to allow VFS_ROOT() to potentially
recurse on the shared lock even in the presence of an exclusive
waiter.
That the existing code works for unionfs is due to a coincidence
of the current unionfs implementation.
Reviewed by: kib
Tested by: pho
Differential Revision: https://reviews.freebsd.org/D37458
Add documentation of the growfs script's new ability to add a swap
partition, expanding on the previous functionality as well. Add the
growfs_fstab helper script, which runs separately. Add a description
of how to expand a file system a second time if swap had been added.
While here, fix a typo.
Reviewed by: pauamma
Differential Revision: https://reviews.freebsd.org/D37465
Add new growfs_swap_size variable with a default value of the empty
string, along with comments on other settings. Used by the growfs
script.
Differential Revision: https://reviews.freebsd.org/D37464
The growfs_fstab script is a helper for the growfs script to add any
new swap partition to /etc/fstab on first boot. If growfs adds a
swap partition, it sets growfs_swap_pdev in the kenv. In this case,
after the root file system is read/write, if there is no swap partition
in the fstab, growfs_fstab adds growfs_swap as a swap partition to the
fstab. Also, it runs dumpon to add the swap partition (as this
happened earlier in the startup sequence).
Discussed with: cperciva
Differential Revision: https://reviews.freebsd.org/D37463
Add the ability to create a swap partition in the course of growing
the root file system on first boot, enabling by default. The default
rules are: add swap if the disk is at least 15 GB (decimal), and the
existing root is less than 40% of the disk. The default size is 10%
of the disk, but is limited by the memory size. The limit is twice
memory size up to 4 GB, 8 GB up to 8 GB memory, and memory size over
8 GB memory. Swap size is clamped at vm.swap_maxpages/2 as well.
The new swap partition is labeled as "growfs_swap".
The default behavior can be overridden by setting growfs_swap_size in
/etc/rc.conf or in the kernel environment, with kenv taking priority.
A value of 0 inhibits the addition of swap, an empty value specifies
the default, and other values indicate a swap size in bytes.
By default, addition of swap is inhibited if a swap partition is found
in the output of the sysctl kern.geom.conftxt before the current root
partition, usually meaning that there is another disk present.
Swap space is not added if one is already present in /etc/fstab.
The root partition is read-only when growfs runs, so /etc/fstab can
not be modified. That step is handled by a new growfs_fstab script,
added in a separate commit. Set the value "growfs_swap_pdev" in kenv
to indicate that this should be done, as well as for internal use.
There is optional verbose output meant for debugging; it can only be
enabled by modifying the script (in two places, for sh and awk).
This should be removed before release, after testing on -current.
Discussed with: cperciva
Reviewed by: imp (previous version)
Differential Revision: https://reviews.freebsd.org/D37462
These ioctls are not vCPU-specific and the ioctl now ignores the vCPU
ID. 0 is used instead of -1 to provide limited forwards
compatibility.
Reviewed by: corvink, markj
Differential Revision: https://reviews.freebsd.org/D37651
These are manipulating state in a ppt(4) device none of which is
vCPU-specific. Mark the vcpu fields in the relevant ioctl structures
as unused, but don't remove them for now.
Reviewed by: corvink, markj
Differential Revision: https://reviews.freebsd.org/D37639
`int foo();` means 'a function that takes any number of arguments.`
not `a function that takes no arguemnts`, that's spelled `int foo(void);`
Adopt the latter.
Sponsored by: Netflix
kadm5_c_get_principal() should check the return code from
kadm5_ret_principal_ent(). As it doesn't it assumes success when
there is none and can lead to potential vulnerability. Fix this.
Reported by: rtm@csail.mit.edu
MFC after: 3 days
Zero length client requests result in a bus fault when attempting to
free malloc()ed pointers within the requests softc. Return an error
when the request is zero length.
This properly fixes PR/268062 without regressions.
PR: 268062
Reported by: Robert Morris <rtm@lcs.mit.edu>
MFC after: 3 days
Return the value as stat(2) st_blocks.
Suggested and reviewed by: markj (previous version)
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37097
This makes tmpfs size accounting correct for the sparce files. Also
correct report st_blocks/va_bytes. Previously the reported value did not
accounted for the swapped out pages.
PR: 223015
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37097
For dynamically allocated pager type, which inherits the parent's alloc
method, type of the returned object is set to the parent's type
otherwise.
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37097
The vnode could be reclaimed and allocated again during the lifecycle of
the node, but the node cannot. Also, referencing the node would allow
to reach it and tmpfs mount data from the object, regardless of the
state of the possibly absent vnode.
Still use swp_tmpfs for back-pointer, instead of using handle. Use of
named swap objects would incur taking the sw_alloc_sx on node allocation
and deallocation.
swp_tmpfs is renamed to swp_priv to remove the last bit of tmpfs in vm/.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37097
also make it return the count of the swap pages freed, which are not
simultaneously resident in the object.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37097
* Add link-state change notifications by subscribing to ifnet_link_event.
In the Linux netlink model, link state is reported in 2 places: first is
the IFLA_OPERSTATE, which stores state per RFC2863.
The second is an IFF_LOWER_UP interface flag. As many applications rely
on the latter, reserve 1 bit from if_flags, named as IFF_NETLINK_1.
This flag is mapped to IFF_LOWER_UP in the netlink headers. This is done
to avoid making applications think this flag is actually
supported / presented in non-netlink outputs.
* Add flag change notifications, by hooking into rt_ifmsg().
In the netlink model, notification should include the bitmask for the
change flags. Update rt_ifmsg() to include such bitmask.
Differential Revision: https://reviews.freebsd.org/D37597
Linux has /sys/firmware/fdt and /proc/device-tree to publish the dtb for
the system. The former has it all in one file, while the latter breaks
it out. Prefer the former since it's the more modern interface, but
retain both since I don't have a PS3 to test to see if its kernel is new
enough for /sys/firmware or not.
In addition, do the proper fixup.
Sponsored by: Netflix
This allows backporting of new fileops function pointers while
preserving KBI.
Bump __FreeBSD_version.
Sponsored by: Juniper Networks, Inc.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D37636
