CVS log for src/sys/sys/namei.h

Up to [cvs.NetBSD.org] / src / sys / sys

Request diff between arbitrary revisions

Keyword substitution: kv
Default branch: MAIN

regen

Regen.

Back out recent change to replace pool_cache with then general allocator.
Will return to this when I have time again.

Regen.

Regen.

Sync with HEAD.

Regen.

Regen for ticket #1685

Regen for ticket #1296

Sync w/ HEAD.

Regen.

Regen.

Regen.

Regen.

Add ACL support for FFS. From FreeBSD.

Regen.

Mostly merge changes from HEAD upto 20200411

Regen.

Regen.

Regen.

Regen.

Regen.

Regen.

Regen.

Sync with head.

Regen.

Regen.

Regen.

Regen.

Regen.

Regen.

namecache changes:

- Delete the per-entry lock, and borrow the associated vnode's v_interlock
  instead.  We need to acquire it during lookup anyway.  We can revisit this
  in the future but for now it's a stepping stone, and works within the
  quite limited context of what we have (BSD namecache/lookup design).

- Implement an idea that Mateusz Guzik (mjg@FreeBSD.org) gave me.  In
  cache_reclaim(), we don't need to lock out all of the CPUs to garbage
  collect entries.  All we need to do is observe their locks unheld at least
  once: then we know they are not in the critical section, and no longer
  have visibility of the entries about to be garbage collected.

- The above makes it safe for sysctl to take only namecache_lock to get stats,
  and we can remove all the crap dealing with per-CPU locks.

- For lockstat, make namecache_lock a static now we have __cacheline_aligned.

- Avoid false sharing - don't write back to nc_hittime unless it has changed.
  Put a a comment in place explaining this.  Pretty sure this was there in
  2008/2009 but someone removed it (understandably, the code looks weird).

- Use a mutex to protect the garbage collection queue instead of atomics, and
  adjust the low water mark up so that cache_reclaim() isn't doing so much
  work at once.

Regen

Sync with HEAD

 Regen.

update from HEAD

Sync with HEAD

Sync with HEAD

Sync with HEAD

regen

Sync with HEAD

regen

regen

regen

Sync with HEAD

Cull unused INRENAME and INRELOOKUP from callers.

Sync with HEAD

Regen.

Update stats-keeping in sys/kern/vfs_cache.c to remove (most)
races while allowing consistent lockless sampling of the per-cpu
statistics without atomic operations.  Update comment describing
the locking protocol to include this.

Don't nest structure definitions.

Rebase to HEAD as of a few days ago.

Rebase.

Regen.

Regen.

sync with (a bit old) head

Resync to 2012-11-19 00:00:00 UTC

Regen from updated namei.src.

Add most system calls for POSIX extended API set, part 2, with test cases:
faccessat(2), fchmodat(2), fchownat(2), fstatat(2), mkdirat(2), mkfifoat(2),
mknodat(2), linkat(2), readlinkat(2), symlinkat(2), renameat(2), unlinkat(2),
utimensat(2), openat(2).

Also implement O_SEARCH for openat(2)

Still missing:
- some flags for openat(2)
- fexecve(2) implementation

regen

regen

regen

sync with head

regen

regen

sync with head

Regen.

change printf gcc attribute to __printflike(), requested by joerg.

add more missing printf attributes.

Sync with HEAD.

sync with head

- Replace few malloc(9) uses with kmem(9).
- Rename buf_malloc() to buf_alloc(), fix comments.
- Remove some unnecessary inclusions.

sync with head

Regen for ISSYMLINK removal.

sync with head

regen: fix PARAMASK

Final regen for tonight.

Regen yet again.

Regen again.

Regen.

Regen for both preceding commits of namei.src together. I suppose I should
technically have regen'd separately for each but it didn't seem worthwhile.

Regen.

sync to netbsd-5

sync with head

Regen for ticket 1289

regen: INRENAME

regen again (forgot both patches touched namei.h)

regen

Sync with HEAD.

sync with head.

regen

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Whitespace (Remove diff to HEAD.)

Sync with HEAD.

Regen.

Sync with HEAD.

Sync with HEAD.

Update haad-dm branch to haad-dm-base2.

Regen for ticket 76.

Pull up following revision(s) (requested by ad in ticket #76):
	sys/sys/namei.h: revision 1.61
	sys/kern/vfs_lookup.c: revision 1.111
Add a NOCHROOT flag for namei(). Looks outside any chroot and performs the
lookup from the root directory if given an absolute path.

regen

Correction to previous.

Add a NOCHROOT flag for namei(). Looks outside any chroot and performs the
lookup from the root directory if given an absolute path.

Sync with HEAD.

Regen.

Regen.

sync with head

sync with HEAD

Sync with HEAD.

Sync with head.

Sync with HEAD.

regen

Remove cn_lwp from struct componentname.  curlwp should be used
from on.  The NDINIT() macro no longer takes the lwp parameter and
associates the credentials of the calling thread with the namei
structure.

Sync with HEAD.

sync with head

Sync with HEAD. amd64 Xen support needs testing.

regen: assert l == curlwp in NDINIT

regen

Sync with HEAD.

sync with head.

Sync with HEAD

Sync with HEAD.

sync with -HEAD

Merge from vmlocking:

- pool_cache changes.
- Debugger/procfs locking fixes.
- Other minor changes.

Sync with head.

Sync with HEAD.

sync with head.

Sync with HEAD.

Update for pool_cache API changes.

regen:

Modernize struct nameidata types: long -> int32 or size_t,
depending on the case.

regen - update PARAMASK to match reality

Sync with HEAD.

Sync with HEAD.

regen

Sync with head.

Sync with head.

- remove pathname_ interface.
- use macros to deal with pathnames in userspace, when veriexec is used.
- reorder the veriexec_ call arguments for consistency.
With help from elad@ finding the last bug.

sync with head.

Change the way that emulations locate files within the emulation root to
  avoid having to allocate space in the 'stackgap'
  - which is very LWP unfriendly.
The additional code for non-emulation namei() is trivial, the reduction for
  the emulations is massive.
The vnode for a processes emulation root is saved in the cwdi structure
  during process exec.
If the emulation root the TRYEMULROOT flag are set, namei() will do an initial
  search for absolute pathnames in the emulation root, if that fails it will
  retry from the normal root.
".." at the emulation root will always go to the real root, even in the middle
  of paths and when expanding symlinks.
Absolute symlinks found using absolute paths in the emulation root will be
  relative to the emulation root (so /usr/lib/xxx.so -> /lib/xxx.so links
  inside the emulation root don't need changing).
If the root of the emulation would be returned (for an emulation lookup), then
  the real root is returned instead (matching the behaviour of emul_lookup,
  but being a cheap comparison here) so that programs that scan "../.."
  looking for the root dircetory don't loop forever.
The target for symbolic links is no longer mangled (it used to get the
  CHECK_ALT_xxx() treatment, so could get /emul/xxx prepended).
CHECK_ALT_xxx() are no more. Most of the change is deleting them, and adding
  TRYEMULROOT to the flags to NDINIT().
A lot of the emulation system call stubs could now be deleted.

Sync with head.

Pullup to -current

sync with head.

Delete some stuff that has been commented out for over 12 years, and
some that shouldn't have been left commented out when the field got moved.

Apply patch (requested by chs in ticket #422):
- Fix various deadlock problems with nullfs and unionfs.
- Speed up path lookups by upto 25%.

Sync with head.

Pull up following revision(s) (requested by elad in ticket #304):
	sys/kern/vfs_syscalls.c: revision 1.282
	sys/kern/vfs_lookup.c: revision 1.76
	sys/sys/namei.h: revision 1.47
PR/35278: YAMAMOTO Takashi: veriexec sometimes feeds user va to log(9)
Introduce the (intentionally undocumented) pathname_get(), pathname_path(),
and pathname_put(), to deal with allocating and copying of pathnames from
either kernel- or user-space.

sync with head.

PR/35278: YAMAMOTO Takashi: veriexec sometimes feeds user va to log(9)

Introduce the (intentionally undocumented) pathname_get(), pathname_path(),
and pathname_put(), to deal with allocating and copying of pathnames from
either kernel- or user-space.

sync with head.

a smorgasbord of improvements to vnode locking and path lookup:
 - LOCKPARENT is no longer relevant for lookup(), relookup() or VOP_LOOKUP().
   these now always return the parent vnode locked.  namei() works as before.
   lookup() and various other paths no longer acquire vnode locks in the
   wrong order via vrele().  fixes PR 32535.
   as a nice side effect, path lookup is also up to 25% faster.
 - the above allows us to get rid of PDIRUNLOCK.
 - also get rid of WANTPARENT (just use LOCKPARENT and unlock it).
 - remove an assumption in layer_node_find() that all file systems implement
   a recursive VOP_LOCK() (unionfs doesn't).
 - require that all file systems supply vfs_vptofh and vfs_fhtovp routines.
   fill in eopnotsupp() for file systems that don't support being exported
   and remove the checks for NULL.  (layerfs calls these without checking.)
 - in union_lookup1(), don't change refcounts in the ISDOTDOT case, just
   adjust which vnode is locked.  fixes PR 33374.
 - apply fixes for ufs_rename() from ufs_vnops.c rev. 1.61 to ext2fs_rename().

sync with head

sync with head

- Use the LWP cached credentials where sane.
- Minor cosmetic changes.

sync with head.

Sync with head.

Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.

sync with head.

integrate kauth.

sync with head

don't expose struct nameidata to userland.

- Move kauth_cred_t declaration to <sys/types.h>
- Cleanup struct ucred; forward declarations that are unused.
- Don't include <sys/kauth.h> in any header, but include it in the c files
  that need it.

Approved by core.

Sync with head.

Adapt to kernel authorization changes.

sync with head.

Make a note that some counters should be 64-bit as they wrap far to
quickly.

merge ktrace-lwp.

Sync with HEAD. Here we go again...

Whitespace tweaks.

Remove the last references to M_NAMEI; everything should be using PNBUF_*()
now (for a long time now).  Remove M_NAMEI, and bump the kernel version to
3.99.7 to reflect its removal.

sync with -current

sync with head.

Sync with HEAD.

de-__P

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

Pull up revision 1.35 (requested by tls in ticket #634):
make cache_purge more controlable.
namely, allow following operations.
	- purge only an entry specified by a component name.
	- purge only child entries.
	- purge only parent entries.
no objections on tech-kern@.

introduce a new function, cache_lookup_raw(), for filesystems which
want more flexible namecache handling.
it just looks up a dnlc entry and vget() the result vnode.
ie. no automatic entry removal, no automatic vnode locking.

discussed on tech-kern@.

remove declaration of cache_purge that has turned into a macro.

make cache_purge more controlable.
namely, allow following operations.
	- purge only an entry specified by a component name.
	- purge only child entries.
	- purge only parent entries.
no objections on tech-kern@.

PR/15397: Jason Thorpe: directory operations on pathnames that refer to
directories and have trailing slashes should succeed. Ok'd by kjk.
Fix provided by enami.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

remove remaining v_id.

maintain the list of namecaches attached to the vnode.
it makes vnodes freeable.

prototype must not carry variable name

Apply the aborted ktrace-lwp changes to a specific branch.  This is just for
others to review, I'm concerned that patch fuziness may have resulted in some
errant code being generated but I'll look at that later by comparing the diff
from the base to the branch with the file I attempt to apply to it.  This will,
at the very least, put the changes in a better context for others to review
them and attempt to tinker with removing passing of 'struct lwp' through
the kernel.

Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records.  The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

Add extensible malloc types, adapted from FreeBSD.  This turns
malloc types into a structure, a pointer to which is passed around,
instead of an int constant.  Allow the limit to be adjusted when the
malloc type is defined, or with a function call, as suggested by
Jonathan Stone.

catch up with -current on kqueue branch

Catch up to -current.

Eliminate commons.

Sync kqueue branch with -current.

Catch up to -current.

- Implement
	uint32_t namei_hash(const char *p, const char **ep)
  which determines the equivalent MI hash32_str() hash for p.
  If *ep != NULL, calculate the hash to the character before ep.
  If *ep == NULL, calculate the has to the first / or NUL found, and
  point *ep to that location.
- Use namei_hash() to calculate cn_hash in lookup() and relookup().
  Hash distribution goes from 35-40% to 55-70%, with similar profiled
  time spent in cache_lookup() and cache_enter() on my P3-600.
- Use namei_hash() to calculate cn_hash in nfs_readdirplusrpc(),
  insetad of homegrown code (that differed from that in lookup() !)
  namei_hash() has better spread and is faster than previous code
  (which used a non-constant multiplication).

fix comment

Catch up to -current.

Use a pool cache for namei buffers -- it's faster to allocate from
a pool cache than a pool.

Catch up with -current.

Catch up to -current.
Again.

resize the namecache hash table also when desiredvnodes changes.

Catch up to -current.

Update the kqueue branch to HEAD.

Set the credentials to be used in the NDINIT macro so that syscalls can
hijack them.

Sync with HEAD.

add ddb commands "show uvmexp" and "show ncache".
the former used to be "call uvm_dump", the latter is new.

Update thorpej_scsipi to -current as of a month ago

Convert namei pathname buffer allocation to use the pool allocator.

change "nextvnodeid" from a global in namei.h to a static in
the one function that uses it.

correct typo in SAVENAME's comment

Update from trunk.

Add PDIRUNLOCKED which will be set by a leaf fs when it returns an error
and has unlocked the parrent vnode. Should only actually be returned if
the fs needs to unlock the parrent and has difficulty re-locking the
parrent. Needed so that layered fs's can keep track of locking.

Change namei cache to record vnode->(parent,name) entries (for directories).
Add kernel implementation of getcwd() which uses this cache, falling
back to reading the filesystem on a cache miss.
Along for the ride: add new VOP_FSYNC flag FSYNC_RECLAIM indicating
that a reclaim is being done, so only a "shallow" fsync is needed.

Merge with Lite2 + local changes

Import 4.4BSD-Lite2

Import 4.4BSD-Lite for reference

Snapshot of namei() cleanup:
1) Eliminate all of the null component name special cases; handle runs of
slashes and leading and trailing slashes completely differently.
2) Return ENOENT when doing a lookup through an empty symlink.
3) Enforce that we're doing a lookup through a directory in in chdir() and
lookup() rather than in foo_lookup().

Not yet finished.

make the namei struct members ni_dirp and ni_next, and the componentname
struct member cn_nameptr 'const', since they should never be used to
modify the path name.  (Only the pathname buffer, cn_pnbuf, should be
modified.)  Propagate the const poisoning to code that uses the namei
and componentname structs.

Filesystem prototype changes

ni_pathlen should be a size_t

KERNEL -> _KERNEL

Sync with CSRG.

Convert process, file, and namei lists and hash tables to use queue.h.

New RCS ID's, take two.  they're more aesthecially pleasant, and use 'NetBSD'

new standard, minimally intrusive ID format

Update to 4.4-Lite fs code, with local changes.

add rcs ids as necessary, and also clean up headers

Add consistent multiple-inclusion protection.

initial import of 386bsd-0.1 sources

Initial revision