CVS log for src/sys/fs/v7fs/v7fs_vnops.c

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Keyword substitution: kv
Default branch: MAIN

Don't panic for a negative offset, just fail the operation with EINVAL.

fix various small typos, mainly in comments.

fix unlock on error.

add a kauth vnode check for creating links

A component name is a counted string (cn_nameptr, cn_namelen),
not a zero terminated string cn_nameptr.

Change the following operations to work with counted strings:

v7fs_file_lookup_by_name()
v7fs_file_allocate()
v7fs_file_deallocate()
v7fs_directory_add_entry()
v7fs_directory_remove_entry()
v7fs_file_rename()
v7fs_file_link()
v7fs_dirent_filename()

Adapt all vnode operations with component names as argument.

fix spelling of "regular" in comment

Overhaul of the EVFILT_VNODE kevent(2) filter:

- Centralize vnode kevent handling in the VOP_*() wrappers, rather than
  forcing each individual file system to deal with it (except VOP_RENAME(),
  because VOP_RENAME() is a mess and we currently have 2 different ways
  of handling it; at least it's reasonably well-centralized in the "new"
  way).
- Add support for NOTE_OPEN, NOTE_CLOSE, NOTE_CLOSE_WRITE, and NOTE_READ,
  compatible with the same events in FreeBSD.
- Track which kevent notifications clients are interested in receiving
  to avoid doing work for events no one cares about (avoiding, e.g.
  taking locks and traversing the klist to send a NOTE_WRITE when
  someone is merely watching for a file to be deleted, for example).

In support of the above:

- Add support in vnode_if.sh for specifying PRE- and POST-op handlers,
  to be invoked before and after vop_pre() and vop_post(), respectively.
  Basic idea from FreeBSD, but implemented differently.
- Add support in vnode_if.sh for specifying CONTEXT fields in the
  vop_*_args structures.  These context fields are used to convey information
  between the file system VOP function and the VOP wrapper, but do not
  occupy an argument slot in the VOP_*() call itself.  These context fields
  are initialized and subsequently interpreted by PRE- and POST-op handlers.
- Version VOP_REMOVE(), uses the a context field for the file system to report
  back the resulting link count of the target vnode.  Return this in tmpfs,
  udf, nfs, chfs, ext2fs, lfs, and ufs.

NetBSD 9.99.92.

Introduce genfs_pathconf() and use it for the default case in all filesystems.

Add ACL support for FFS. From FreeBSD.

Sync with bouyer-xenpvh-base2 (HEAD)

PR kern/54759 (vm.ubc_direct deadlock when read()/write() into mapping of itself)

- Add new flag UBC_ISMAPPED which tells ubc_uiomove() the object is mmap()ed
  somewhere.  Use it to decide whether to do direct-mapped copy, rather than
  poking around directly in the vnode in ubc_uiomove(), which is ugly and
  doesn't work for tmpfs.  It would be nicer to contain all this in UVM but
  the filesystem provides the needed locking here (VV_MAPPED) and to
  reinvent that would suck more.

- Rename UBC_UNMAP_FLAG() to UBC_VNODE_FLAGS().  Pass in UBC_ISMAPPED where
  appropriate.

Sync with HEAD

Sync with HEAD

Replace most uses of vp->v_usecount with a call to vrefcnt(vp), a function
that hides the details and does atomic_load_relaxed().  Signature matches
FreeBSD.

Merge changes from current as of 20200406

Sync with head.

VFS_VGET(), VFS_ROOT(), VFS_FHTOVP(): give them a "int lktype" argument, to
allow us to get shared locks (or no lock) on the returned vnode.  Matches
FreeBSD.

update from HEAD

Sync with HEAD

Make VOP_RECLAIM do the last unlock of the vnode.

VOP_RECLAIM naturally has exclusive access to the vnode, so having it
locked on entry is not strictly necessary -- but it means if there
are any final operations that must be done on the vnode, such as
ffs_update, requiring exclusive access to it, we can now kassert that
the vnode is locked in those operations.

We can't just have the caller release the last lock because some file
systems don't use genfs_lock, and require the vnode to remain valid
for VOP_UNLOCK to work, notably unionfs.

Change VOP_REMOVE and VOP_RMDIR to preserve lock/ref on dvp.

No change to vp -- the plan is to replace the node by the
componentname in the vop parameters, and let all directory vops do
lookups internally.

Proposed on tech-kern with no objections:
https://mail-index.netbsd.org/tech-kern/2017/04/17/msg021825.html

Sync with HEAD

Sync with HEAD

Make VOP_INACTIVE preserve vnode lock on return.

Discussed on tech-kern:
https://mail-index.netbsd.org/tech-kern/2017/04/01/msg021751.html

Ride 7.99.68, a bumpy bus of incremental vfs improvements!

Update mtime when updating file size.

PR kern/51762 (mtime not updated by open(O_TRUNC))

Sync with HEAD

Remove now obsolete operation vcache_remove().

Welcome to 7.99.36

Sync with HEAD

Make VOP_LINK return directory still locked and referenced.

Ride 7.99.10 bump.

Sync with HEAD

Pull up following revision(s) (requested by hannken in ticket #386):
	sys/fs/v7fs/v7fs_file.c: revision 1.6
	sys/fs/v7fs/v7fs_vnops.c: revision 1.18
	sys/fs/v7fs/v7fs_vnops.c: revision 1.19
	sys/fs/v7fs/v7fs_vfsops.c: revision 1.11
v7fs_getattr: adjust size of symlinks by -1 to compensate the trailing NUL.
Should fix the v7fs part of PR kern/48864.
Defer deallocating unlinked inodes to v7fs_reclaim().
Remove v7fs_vnode_reload() and always use v7fs_inode_load().  No need
to search for a vnode we already hold a reference on.

Change v7fs to vcache.

Defer deallocating unlinked inodes to v7fs_reclaim().

Remove v7fs_vnode_reload() and always use v7fs_inode_load().  No need
to search for a vnode we already hold a reference on.

v7fs_getattr: adjust size of symlinks by -1 to compensate the trailing NUL.

Should fix the v7fs part of PR kern/48864.

Rebase to HEAD as of a few days ago.

Rebase.

Whitespace fix

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

Change vnode operation lookup to return the resulting vnode *vpp unlocked.
Change cache_lookup() to return an unlocked vnode.

Discussed on tech-kern@

Welcome to 6.99.31

Change vnode operations create, mknod, mkdir and symlink to return
the resulting vnode *vpp unlocked.

Discussed on tech-kern@

Welcome to 6.99.30

Change vnode operations create, mknod, mkdir and symlink to keep the
directory node dvp locked on return.

Discussed on tech-kern@

Welcome to 6.99.29

v7fs: replace malloc(9) with kmem(9), fix a memory leak and few missing
mutex destruction cases in the error path.

resync from head

C99 section 6.7.2.3 (Tags) Note 3 states that:

  A type specifier of the form

	enum identifier

  without an enumerator list shall only appear after the type it
  specifies is complete.

which means that we cannot pass an "enum vtype" argument to
kauth_access_action() without fully specifying the type first.
Unfortunately there is a complicated include file loop which
makes that difficult, so convert this minimal function into a
macro (and capitalize it).

(ok elad@)

sync to latest -current.

sync with head.

Pull up following revision(s) (requested by chs in ticket #204):
	sys/fs/sysvbfs/sysvbfs_vnops.c: revision 1.44
	sys/ufs/ffs/ffs_vfsops.c: revision 1.277
	sys/fs/v7fs/v7fs_vnops.c: revision 1.11
	sys/ufs/chfs/chfs_vnops.c: revision 1.7
	sys/ufs/ext2fs/ext2fs_readwrite.c: revision 1.61
	sys/miscfs/genfs/genfs_io.c: revision 1.54
	sys/kern/vfs_wapbl.c: revision 1.52
	sys/uvm/uvm_pager.h: revision 1.43
	sys/ufs/ffs/ffs_vnops.c: revision 1.121
	sys/kern/vfs_subr.c: revision 1.434
	sys/fs/msdosfs/msdosfs_vnops.c: revision 1.83
	sys/fs/ntfs/ntfs_vnops.c: revision 1.51
	sys/fs/udf/udf_subr.c: revision 1.119
	sys/miscfs/specfs/spec_vnops.c: revision 1.135
	sys/ufs/ext2fs/ext2fs_vnops.c: revision 1.103
	sys/fs/udf/udf_vnops.c: revision 1.71
	sys/ufs/ufs/ufs_readwrite.c: revision 1.104
change vflushbuf() to take the full FSYNC_* flags.
translate FSYNC_LAZY into PGO_LAZY for VOP_PUTPAGES() so that
genfs_do_io() can set the appropriate io priority for the I/O.
this is the first part of addressing PR 46325.
mark all wapbl I/O as BPRIO_TIMECRITICAL.
this is the second part of addressing PR 46325.

change vflushbuf() to take the full FSYNC_* flags.
translate FSYNC_LAZY into PGO_LAZY for VOP_PUTPAGES() so that
genfs_do_io() can set the appropriate io priority for the I/O.
this is the first part of addressing PR 46325.

sync with head

sync to latest -current.

Make v7fs_getattr() report file flags, and adjust v7fs_setattr() to
allow unsetting SF_APPEND flag.

Pass operations flags to genfs_can_chtimes(), not file ones.

Replace the remaining KAUTH_GENERIC_ISSUSER authorization calls with
something meaningful. All relevant documentation has been updated or
written.

Most of these changes were brought up in the following messages:

    http://mail-index.netbsd.org/tech-kern/2012/01/18/msg012490.html
    http://mail-index.netbsd.org/tech-kern/2012/01/19/msg012502.html
    http://mail-index.netbsd.org/tech-kern/2012/02/17/msg012728.html

Thanks to christos, manu, njoly, and jmmv for input.

Huge thanks to pgoyette for spinning these changes through some build
cycles and ATF.

merge to -current.

Check parent directory write permission for DELETE operation.

ok uch@.

v7fs_lookup() fix return value. Pass t_vnops rename_dir(3)
v7fs_setttr() check credential. Pass t_unpriv owner
v7fs_rename() reload inode(v7fs_vnode_reload). Pass t_vnops rename_reg_nodir

Existing inode don't recycle. rump works.

core symlink operation moved to v7fs_file_util.c and introduce V7FSBSD_MAXSYMLINKLEN for makefs

Fix readdir eofflag(bogus eofflags was setted). getcwd works.

Fix inode update method. chown and chmod works.

7th Edition(V7) File System support. and NetBSD symbolic-link, socket, FIFO extension. see newfs_v7fs(8).