IFC @231845

Sponsored by: Cisco Systems, Inc.

Analogous to r230407 a separate path buffer in vfs_mount.c is required
for r230129. Fixes a out of bounds write to fspath.

MFC after: 10 days

IFC @230489 (pending review).

Make sure all intermediate variables holding mount flags (mnt_flag)
and that all internal kernel calls passing mount flags are declared
as uint64_t so that flags in the top 32-bits are not lost.

MFC

Make sure all intermediate variables holding mount flags (mnt_flag)
and that all internal kernel calls passing mount flags are declared
as uint64_t so that flags in the top 32-bits are not lost.

MFC after: 2 weeks

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Introduce vn_path_to_global_path()

This function updates path string to vnode's full global path and checks
the size of the new path string against the pathlen argument.

In vfs_domount(), sys_unmou

Introduce vn_path_to_global_path()

This function updates path string to vnode's full global path and checks
the size of the new path string against the pathlen argument.

In vfs_domount(), sys_unmount() and kern_jail_set() this new function
is used to update the supplied path argument to the respective global path.

Unbreaks jailed zfs(8) with enforce_statfs set to 1.

Reviewed by: kib
MFC after: 1 month

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IFC @ r227804

Pull in the virtio drivers from head.

Introduce the option VFS_ALLOW_NONMPSAFE and turn it on by default on
all the architectures.
The option allows to mount non-MPSAFE filesystem. Without it, the
kernel will refuse to mount a non-MPSAFE

Introduce the option VFS_ALLOW_NONMPSAFE and turn it on by default on
all the architectures.
The option allows to mount non-MPSAFE filesystem. Without it, the
kernel will refuse to mount a non-MPSAFE filesytem.

This patch is part of the effort of killing non-MPSAFE filesystems
from the tree.

No MFC is expected for this patch.

Tested by: gianni
Reviewed by: kib

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Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.

This means that their use is restricted to a single C file.

IFC @ r226824

When unmounting a filesystem always wait for the vfs_busy lock to clear
so that if no vnodes in the filesystem are actively in use the unmount
will succeed rather than failing with EBUSY.

Reported b

When unmounting a filesystem always wait for the vfs_busy lock to clear
so that if no vnodes in the filesystem are actively in use the unmount
will succeed rather than failing with EBUSY.

Reported by: Garrett Cooper
Reviewed by: Attilio Rao and Kostik Belousov
Tested by: Garrett Cooper
PR: kern/161016
MFC after: 3 weeks

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MFC

In order to maximize the re-usability of kernel code in user space this
patch modifies makesyscalls.sh to prefix all of the non-compatibility
calls (e.g. not linux_, freebsd32_) with sys_ and updates

In order to maximize the re-usability of kernel code in user space this
patch modifies makesyscalls.sh to prefix all of the non-compatibility
calls (e.g. not linux_, freebsd32_) with sys_ and updates the kernel
entry points and all places in the code that use them. It also
fixes an additional name space collision between the kernel function
psignal and the libc function of the same name by renaming the kernel
psignal kern_psignal(). By introducing this change now we will ease future
MFCs that change syscalls.

Reviewed by: rwatson
Approved by: re (bz)

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IFC @ r225592

sys/dev/bvm/bvm_console.c - move up to the new alt-break order.

Integrate FreeBSD/head into projects/zfsd/head as of SVN revision 224870.

Revert r224655 and r224614 because vn_fullpath* does not always work
on nullfs mounts.

Change shall be reconsidered after 9.0 is released.

Requested by: re (kib)
Approved by: re (kib)

The change in r224615 didn't take into account that vn_fullpath_global()
doesn't operate on locked vnode. This could cause a panic.

Fix by unlocking vnode, re-locking afterwards and verifying that i

The change in r224615 didn't take into account that vn_fullpath_global()
doesn't operate on locked vnode. This could cause a panic.

Fix by unlocking vnode, re-locking afterwards and verifying that it wasn't
renamed or deleted. To improve readability and reduce code size, move code
to a new static function vfs_verify_global_path().

In addition, fix missing giant unlock in unmount().

Reported by: David Wolfskill <david@catwhisker.org>
Reviewed by: kib
Approved by: re (bz)
MFC after: 2 weeks

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For mount, discover f_mntonname from supplied path argument
using vn_fullpath_global(). This fixes f_mntonname if mounting
inside chroot, jail or with relative path as argument.

For unmount in jail,

For mount, discover f_mntonname from supplied path argument
using vn_fullpath_global(). This fixes f_mntonname if mounting
inside chroot, jail or with relative path as argument.

For unmount in jail, use vn_fullpath_global() to discover
global path from supplied path argument. This fixes unmount in jail.

Reviewed by: pjd, kib
Approved by: re (kib)
MFC after: 2 weeks

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This update changes the mnt_flag field in the mount structure from
32 bits to 64 bits and eliminates the unused mnt_xflag field. The
existing mnt_flag field is completely out of bits, so this update

This update changes the mnt_flag field in the mount structure from
32 bits to 64 bits and eliminates the unused mnt_xflag field. The
existing mnt_flag field is completely out of bits, so this update
gives us room to expand. Note that the f_flags field in the statfs
structure is already 64 bits, so the expanded mnt_flag field can
be exported without having to make any changes in the statfs structure.

Approved by: re (bz)

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IFC @ r224187

Integrate from Head into ZFSD feature branch as of revision r224141.

Include sys/sbuf.h directly.

MFC

Use a name instead of a magic number for kern_yield(9) when the priority
should not change. Fetch the td_user_pri under the thread lock. This
is probably not necessary but a magic number also seems

Use a name instead of a magic number for kern_yield(9) when the priority
should not change. Fetch the td_user_pri under the thread lock. This
is probably not necessary but a magic number also seems preferable to
knowing the implementation details here.

Requested by: Jason Behmer < jason DOT behmer AT isilon DOT com >

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Utilize vfs_sanitizeopts() in vfs_mergeopts() to merge options. Because
vfs_sanitizeopts() can handle "ro" and "rw" options properly, there is
no more need to add "noro" in vfs_donmount() to cancel "

Utilize vfs_sanitizeopts() in vfs_mergeopts() to merge options. Because
vfs_sanitizeopts() can handle "ro" and "rw" options properly, there is
no more need to add "noro" in vfs_donmount() to cancel "ro".

This also fixes a problem of canceling options beginning with "no".
For example, "noatime" didn't cancel "nonoatime". Thus it was possible
that both "noatime" and "nonoatime" were active at the same time.

Reviewed by: bde

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Fix some style issues in r219925.

Reported by: bde
MFC after: 1 month