Also remove once-used functions to clean up after failed insmntque1(),
which were destructor callbacks in previous life.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D34071
I was somehow convinced that insmntque calls insmntque1 with a NULL
destructor. Unfortunately this worked well enough to not immediately
blow up in simple testing.
Keep not using the destructor in previously patched filesystems though
as it avoids unnecessary casts.
Noted by: kib
Reported by: pho
The cookies argument is only used by the NFS server. NFSv2 defines the
cookie as 32 bits on the wire, but NFSv3 increased it to 64 bits. Our
VOP_READDIR, however, has always defined it as u_long, which is 32 bits
on some architectures. Change it to 64 bits on all architectures. This
doesn't matter for any in-tree file systems, but it matters for some
FUSE file systems that use 64-bit directory cookies.
PR: 260375
Reviewed by: rmacklem
Differential Revision: https://reviews.freebsd.org/D33404
This allows to stop maintaing the VI_TEXT_REF flag and consequently
opens up fully lockless v_writecount adjustment.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D33127
This avoids needing to inspect the mount point every time.
Reviewed by: kib (previous version)
Differential Revision: https://reviews.freebsd.org/D33125
Implementing VOP_DEALLOCATE to allow hole-punching in the same manner as
POSIX shared memory's fspacectl(SPACECTL_DEALLOC) support.
Sponsored by: The FreeBSD Foundation
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D31684
The partial page invalidation code is factored out to be a separate
helper from tmpfs_reg_resize().
Sponsored by: The FreeBSD Foundation
Reviewed by: kib
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D31683
Remove OBJT_SWAP_TMPFS. Move tmpfs-specific swap pager bits into
tmpfs_subr.c.
There is no longer any code to directly support tmpfs in sys/vm, most
tmpfs knowledge is shared by non-anon swap object type implementation.
The tmpfs-specific methods are provided by registered tmpfs pager, which
inherits from the swap pager.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D30168
This is OBJT_SWAP pager, specialized for tmpfs. Right now, both swap pager
and generic vm code have to explicitly handle swap objects which are tmpfs
vnode v_object, in the special ways. Replace (almost) all such places with
proper methods.
Since VM still needs a notion of the 'swap object', regardless of its
use, add yet another type-classification flag OBJ_SWAP. Set it in
vm_object_allocate() where other type-class flags are set.
This change almost completely eliminates the knowledge of tmpfs from VM,
and opens a way to make OBJT_SWAP_TMPFS loadable from tmpfs.ko.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D30070
vfs_cache_lookup() has already done the appropriate VEXEC check, therefore
we must not re-check in VOP_CACHEDLOOKUP.
This fixes O_SEARCH semantics on tmpfs and removes a redundant descent into
VOP_ACCESS() in the common case.
Reported-by: arichardson (via CheriBSD Jenkins CI)
Reviewed-by: kib
MFC-after: 3 days
Differential Revision: https://reviews.freebsd.org/D28401
Otherwise it is dereferenced one extra time at unmount, if it survives
long enough. One way to hold the reference on such node is to keep it
open.
tmpfs_vptocnp() now needs to account for the possibility that unlocked
node was removed from the list.
Reported by: danfe
Tested by: danfe, pho
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Despite TMPFS_UNLOCK() is done in both paths later, unlocking not locked
mutex provides different failure mode.
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
We have the d_off field in struct dirent for providing the seek offset
of the next directory entry. Several filesystems were not initializing
the field, which ends up being copied out to userland.
Reported by: Syed Faraz Abrar <faraz@elttam.com>
Reviewed by: kib
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D27792
vm_ooffset_t is now unsigned. Remove some tests for negative values,
or make other adjustments accordingly.
Reported by: Coverity
Reviewed by: kib markj
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D26214
Split TMPFS_NODE_ACCCESSED bit into dedicated byte that can be updated
atomically without locks or (locked) atomics.
tn_update_getattr() change also contains unrelated bug fix.
Reported by: lwhsu
PR: 249362
Reviewed by: markj (previous version)
Discussed with: mjg
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D26451
Or it could be explained as lockless (for vnode lock) reads. Reads
are performed from the node tn_obj object. Tmpfs regular vnode object
lifecycle is significantly different from the normal OBJT_VNODE: it is
alive as far as ref_count > 0.
Ensure liveness of the tmpfs VREG node and consequently v_object
inside VOP_READ_PGCACHE by referencing tmpfs node in tmpfs_open().
Provide custom tmpfs fo_close() method on file, to ensure that close
is paired with open.
Add tmpfs VOP_READ_PGCACHE that takes advantage of all tmpfs quirks.
It is quite cheap in code size sense to support page-ins for read for
tmpfs even if we do not own tmpfs vnode lock. Also, we can handle
holes in tmpfs node without additional efforts, and do not have
limitation of the transfer size.
Reviewed by: markj
Discussed with and benchmarked by: mjg (previous version)
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D26346
Avoid tmpfs mount and node locks when ref count is greater than zero,
which is the case until node is being destroyed by unlink or unmount.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D26346
