sysctlfs was moved to base

I wasn't going to add any more silly examples, but I'll bite for
this one, since it's a good exercise ..

Add icfs, which does the same thing as the refuse-based icfs agc
added earlier this week, i.e. null-mounts & converts the entire
namespace to lowercase. However, it's a fun comparison, since this
is implemented in a completely different fashion from the refuse
version.

Even though the parent doesn't descend here, it's still convenient to
have a makefile to build the 4 examples at once.

Move the Delectable Test File System from share/examples/puffs/dtfs
to tests/fs/puffs/h_dtfs.

No functional change (apart from adjusting the Makefile for test builds).

dtfs (*): a very simple in-memory file system providing an example on
how to use libpuffs

this is not installed into the binary distribution just yet

*) you can call it either "Delectable Test File System" or
"Detrempe File System", depending on what you think will result
in more puffing

Move the Delectable Test File System from share/examples/puffs/dtfs
to tests/fs/puffs/h_dtfs.

No functional change (apart from adjusting the Makefile for test builds).

Move the Delectable Test File System from share/examples/puffs/dtfs
to tests/fs/puffs/h_dtfs.

No functional change (apart from adjusting the Makefile for test builds).

Reinstate the inactive operation (mostly dummy). This makes -i
work again and henceforth makes it possible to test inactive.

Use puffs_kernerr_abort as the error handler.

Remove no longer supported suspend code.

use generic getattr

use puffs_daemon() instead of daemon()

Actually, daemonize the file servers before mounting. I might require
at some point that the local protocol handler does not change after
the file system has been mounted.

Pull the daemonizing code out of the library mainloop into the file
servers. Calling daemon() (i.e. fork()ing) inside a library can
cause nice surprises for e.g. threaded programs. As discussed with
Greg Oster & others.

add testing option -l, which causes the flush of the page cache of
the node under lookup (if found)

fix usage. from Karl Jenkinson

branches: 1.33.2;
require standard mount_foo bar /path usage, where bar is ignored here

branches: 1.32.4;
implement node_mmap and allow to specify accepted mappings on command line

-m for setting maxreqlen

* add mntfromname parameter to puffs_init()
* set it in file servers

dtfs -f for PUFFS_KFLAG_LOOKUP_FULLPNBUF

Move puffs to a two clause license where it already isn't so. And
as agc pointed out, even files with the third clause were already
effectively two clause because of a slight bug in the language...

make getopt() actually accept -t also

Use SETBACK_NOREF instead of SETBACK_INACT to control node removal.
Avoids one round of inactive (wheee!).

"support" vop_poll enough for testing purposes. In short, yield every
poll request for a few seconds before returning.

Adapt to changes with mounting file systems.

Introduce a parameter -r to control the root node type. For example
"dtfs -r 'lnk /etc' /puffs" mounts dtfs with the root node as a
symbolic link to /etc:

jojonaru# ./dtfs -r 'lnk /etc' /puffs
jojonaru# ls -l /puffs
lrw-rw-rw- 1 root wheel 4 May 17 14:06 /puffs -> /etc
jojonaru# cd /puffs
jojonaru# pwd
/etc
jojonaru#

Extra credit for figuring out how to unmount this file system with
umount(8).

Likewise, "dtfs -r 'chr 2 12' /puffs" makes /puffs (i386) /dev/zero etcetc.

Unmount frequently requires some test code, so define it here as
a dummy instead of libpuffs to make plugging the test code in easier.

Default to inactive-on-demand, use inactive setback to request inactive
to be called for a removed node (for unix open file semantics).

mount with write-through page cache if command line -t is given

update usage

adapt to kernel changes with file handles

Instead of keeping on adding parameters to puffs_mount(), make it
only take the bare essentials, which currently means removing
"maxreqlen" from the argument list (all current callers I'm aware
of set it as 0 anyway). Introduce puffs_init(), which provides a
context for setting various parameters and puffs_domount(), which
can be used to mount the file system. Keep puffs_mount() as a
shortcut for the above two for simple file systems.

Bump development ABI version to 13. After all, it's Friday the 13th.
Watch out! Bad things can happen on Friday the 13th. --No carrier--

support nfs exporting dtfs

add support for permissions and file ownership

Add very uncorrect "suspend fs if server gets SIGUSR1" test for fs
suspension (hey, it's a test file system after all .... )

adapt to libpuffs changes

* do mount as a forward operation instead of a callback
* process -o args for mount

apply wide-angle rotollation beam to match libpuffs changes

use command line flags to set various options

counter-rototill for libpuffs change: unify all callback ops under
a single structure

update flag names

adapt to flags parameter for puffs_mainloop()

* no more fsid
* no more start()

adapt to libpuffs namespace change

use generic dummies for sync and unmount

play catchup with the rest of the world, i.e. shuffle stuff a bit

support mknod, essentially makes it possible to run dtfs as /dev

Only nuke directory entry in remove and clear data completely only
when the node is reclaimed. This makes dtfs preserve unix open file
semantics.

dtfs (*): a very simple in-memory file system providing an example on
how to use libpuffs

this is not installed into the binary distribution just yet

*) you can call it either "Delectable Test File System" or
"Detrempe File System", depending on what you think will result
in more puffing

Move the Delectable Test File System from share/examples/puffs/dtfs
to tests/fs/puffs/h_dtfs.

No functional change (apart from adjusting the Makefile for test builds).

dtfs memsets all allocated block content to 0 immediately, so to
avoid wasting unbelievable amounts of memory, set the blocksize to
something more believable. Should fix the memset-part to act only
up to the size the file is extended to, though.

branches: 1.20.4; 1.20.6;
implement node_mmap and allow to specify accepted mappings on command line

With fullpath support we need to check name lengths also, otherwise
lookup for "foo" will match "foobar".

dtfs -f for PUFFS_KFLAG_LOOKUP_FULLPNBUF

Move puffs to a two clause license where it already isn't so. And
as agc pointed out, even files with the third clause were already
effectively two clause because of a slight bug in the language...

"support" vop_poll enough for testing purposes. In short, yield every
poll request for a few seconds before returning.

Adapt to changes with mounting file systems.

Introduce a parameter -r to control the root node type. For example
"dtfs -r 'lnk /etc' /puffs" mounts dtfs with the root node as a
symbolic link to /etc:

jojonaru# ./dtfs -r 'lnk /etc' /puffs
jojonaru# ls -l /puffs
lrw-rw-rw- 1 root wheel 4 May 17 14:06 /puffs -> /etc
jojonaru# cd /puffs
jojonaru# pwd
/etc
jojonaru#

Extra credit for figuring out how to unmount this file system with
umount(8).

Likewise, "dtfs -r 'chr 2 12' /puffs" makes /puffs (i386) /dev/zero etcetc.

support nfs exporting dtfs

use dev_t from puffs_node instead of duplicating it into
fs specific structures

g/c leftovers

Allocate file memory in blocks instead of one big chunk. Makes
writing large files much cheaper since there's no longer a need to
realloc $lots of memory when the file grows.

add support for permissions and file ownership

don't shrink file size when writing to the middle of an existing file

(mandatory AsiaBSDCon live commit)

* do mount as a forward operation instead of a callback
* process -o args for mount

counter-rototill for libpuffs change: unify all callback ops under
a single structure

* no more fsid
* no more start()

play catchup with the rest of the world, i.e. shuffle stuff a bit

update appropriate timestamps after each operation. cvs works much
better now with dtfs /tmp

support mknod, essentially makes it possible to run dtfs as /dev

Only nuke directory entry in remove and clear data completely only
when the node is reclaimed. This makes dtfs preserve unix open file
semantics.

dtfs (*): a very simple in-memory file system providing an example on
how to use libpuffs

this is not installed into the binary distribution just yet

*) you can call it either "Delectable Test File System" or
"Detrempe File System", depending on what you think will result
in more puffing

Move the Delectable Test File System from share/examples/puffs/dtfs
to tests/fs/puffs/h_dtfs.

No functional change (apart from adjusting the Makefile for test builds).

when removing file, free last block also

branches: 1.20.4; 1.20.6;
Match code with comment (can't really remember doing it often that
way around .. ) and initialize storage to zero when extending a file.

With fullpath support we need to check name lengths also, otherwise
lookup for "foo" will match "foobar".

dtfs -f for PUFFS_KFLAG_LOOKUP_FULLPNBUF

adapt: pcn->pcn_cred is now a pointer

Move puffs to a two clause license where it already isn't so. And
as agc pointed out, even files with the third clause were already
effectively two clause because of a slight bug in the language...

Hide struct puffs_usermount from the rest of the world and provide
accessors for interesting data in it. Namely, you can now get
pu->pu_privdata with puffs_getspecific(), pu->pu_pn_root with
puffs_set/getroot() and pu->pu_maxreqlen with puffs_getmaxreqlen().

support nfs exporting dtfs

Allocate file memory in blocks instead of one big chunk. Makes
writing large files much cheaper since there's no longer a need to
realloc $lots of memory when the file grows.

add support for permissions and file ownership

don't shrink file size when writing to the middle of an existing file

(mandatory AsiaBSDCon live commit)

Avoid doing a ludicrous number of reallocs when the file grows by only
lazy extending the file in setattr and really extending it in write.

apply wide-angle rotollation beam to match libpuffs changes

only count directories in the number of hard links to a directory

* no more fsid
* no more start()

play catchup with the rest of the world, i.e. shuffle stuff a bit

update appropriate timestamps after each operation. cvs works much
better now with dtfs /tmp

relax typechecks so that all file types work (they were already supported)

support mknod, essentially makes it possible to run dtfs as /dev

Only nuke directory entry in remove and clear data completely only
when the node is reclaimed. This makes dtfs preserve unix open file
semantics.

dtfs (*): a very simple in-memory file system providing an example on
how to use libpuffs

this is not installed into the binary distribution just yet

*) you can call it either "Delectable Test File System" or
"Detrempe File System", depending on what you think will result
in more puffing

Move the Delectable Test File System from share/examples/puffs/dtfs
to tests/fs/puffs/h_dtfs.

No functional change (apart from adjusting the Makefile for test builds).

Remove no longer supported suspend code.

Rototill.

Ok, ok, a few more words about it: stop holding puffs_cc as a holy
value and passing it around to almost every possible place (popquiz:
which kernel variable does this remind you of?). Instead, pass
the natural choice, puffs_usermount, and fetch puffs_cc via
puffs_cc_getcc() only in routines which actually need it. This
not only simplifies code, but (thanks to the introduction of
puffs_cc_getcc()) enables constructs which weren't previously sanely
possible, say layering as a curious example.

There's still a little to do on this front, but this was the major
fs interface blast.

Remove "puffs_cid" from the puffs interface following l-removal
from the kernel vfs interfaces. puffs_cc_getcaller(pcc) can be
used now should the same information be desired.

branches: 1.21.4;
adapt: **newnode etc. pointers -> struct puffs_newinfo

adapt: pid -> const struct puffs_cid *

Move puffs to a two clause license where it already isn't so. And
as agc pointed out, even files with the third clause were already
effectively two clause because of a slight bug in the language...

"support" vop_poll enough for testing purposes. In short, yield every
poll request for a few seconds before returning.

Adapt to changes with mounting file systems.

Introduce a parameter -r to control the root node type. For example
"dtfs -r 'lnk /etc' /puffs" mounts dtfs with the root node as a
symbolic link to /etc:

jojonaru# ./dtfs -r 'lnk /etc' /puffs
jojonaru# ls -l /puffs
lrw-rw-rw- 1 root wheel 4 May 17 14:06 /puffs -> /etc
jojonaru# cd /puffs
jojonaru# pwd
/etc
jojonaru#

Extra credit for figuring out how to unmount this file system with
umount(8).

Likewise, "dtfs -r 'chr 2 12' /puffs" makes /puffs (i386) /dev/zero etcetc.

Unmount frequently requires some test code, so define it here as
a dummy instead of libpuffs to make plugging the test code in easier.

lessen file handle size sanity checks: kernel does it already (mostly)

adapt to kernel changes with file handles

Hide struct puffs_usermount from the rest of the world and provide
accessors for interesting data in it. Namely, you can now get
pu->pu_privdata with puffs_getspecific(), pu->pu_pn_root with
puffs_set/getroot() and pu->pu_maxreqlen with puffs_getmaxreqlen().

support nfs exporting dtfs

Add very uncorrect "suspend fs if server gets SIGUSR1" test for fs
suspension (hey, it's a test file system after all .... )

adapt to libpuffs changes

* do mount as a forward operation instead of a callback
* process -o args for mount

apply wide-angle rotollation beam to match libpuffs changes

counter-rototill for libpuffs change: unify all callback ops under
a single structure

* no more fsid
* no more start()

use generic dummies for sync and unmount

fix link count for rootnode broken last week

play catchup with the rest of the world, i.e. shuffle stuff a bit

give an estimation of the amount of free space

dtfs (*): a very simple in-memory file system providing an example on
how to use libpuffs

this is not installed into the binary distribution just yet

*) you can call it either "Delectable Test File System" or
"Detrempe File System", depending on what you think will result
in more puffing

Move the Delectable Test File System from share/examples/puffs/dtfs
to tests/fs/puffs/h_dtfs.

No functional change (apart from adjusting the Makefile for test builds).

Reinstate the inactive operation (mostly dummy). This makes -i
work again and henceforth makes it possible to test inactive.

use generic getattr

Rototill.

Ok, ok, a few more words about it: stop holding puffs_cc as a holy
value and passing it around to almost every possible place (popquiz:
which kernel variable does this remind you of?). Instead, pass
the natural choice, puffs_usermount, and fetch puffs_cc via
puffs_cc_getcc() only in routines which actually need it. This
not only simplifies code, but (thanks to the introduction of
puffs_cc_getcc()) enables constructs which weren't previously sanely
possible, say layering as a curious example.

There's still a little to do on this front, but this was the major
fs interface blast.

Remove "puffs_cid" from the puffs interface following l-removal
from the kernel vfs interfaces. puffs_cc_getcaller(pcc) can be
used now should the same information be desired.

add testing option -l, which causes the flush of the page cache of
the node under lookup (if found)

branches: 1.38.2;
Nuke PUFFSLOOKUP_FOO and move to NAMEI_FOO

branches: 1.37.4;
implement node_mmap and allow to specify accepted mappings on command line

missed one place to set dirent namelen - unmiss it

Oops, the cookies for nfs of course represent the *next* directory
entry offset, not the current one.

With fullpath support we need to check name lengths also, otherwise
lookup for "foo" will match "foobar".

nuke accidental debug printf

dtfs -f for PUFFS_KFLAG_LOOKUP_FULLPNBUF

adapt: **newnode etc. pointers -> struct puffs_newinfo

adapt: pid -> const struct puffs_cid *

adapt: pcn->pcn_cred is now a pointer

Move puffs to a two clause license where it already isn't so. And
as agc pointed out, even files with the third clause were already
effectively two clause because of a slight bug in the language...

Use SETBACK_NOREF instead of SETBACK_INACT to control node removal.
Avoids one round of inactive (wheee!).

"support" vop_poll enough for testing purposes. In short, yield every
poll request for a few seconds before returning.

Default to inactive-on-demand, use inactive setback to request inactive
to be called for a removed node (for unix open file semantics).

remove assertion now done in libpuffs

use PUFFS_STORE_DCOOKIE

support nfs exporting dtfs

use dev_t from puffs_node instead of duplicating it into
fs specific structures

Allocate file memory in blocks instead of one big chunk. Makes
writing large files much cheaper since there's no longer a need to
realloc $lots of memory when the file grows.

reflect libpuffs change of puffs_access argument unification

check puffs_access_{chmod,chown,times} in setattr

add support for permissions and file ownership

don't shrink file size when writing to the middle of an existing file

(mandatory AsiaBSDCon live commit)

* remove rogue header
* better variable name to avoid shadowing global symbol name

PUFFS_ISDOTDOT -> PCNISDOTDOT

Avoid doing a ludicrous number of reallocs when the file grows by only
lazy extending the file in setattr and really extending it in write.

* do mount as a forward operation instead of a callback
* process -o args for mount

SUSv3 says: should the implementation not support directory unlinking,
unlink shall fail with EPERM and the errno of the failure shall be EPERM

apply wide-angle rotollation beam to match libpuffs changes

counter-rototill for libpuffs change: unify all callback ops under
a single structure

remove special-case handling for CREATE/RENAME from lookup() - this fs
does not need it, just return ENOENT

adapt to new lookup signature

update appropriate timestamps after each operation. cvs works much
better now with dtfs /tmp

relax typechecks so that all file types work (they were already supported)

support mknod, essentially makes it possible to run dtfs as /dev

Only nuke directory entry in remove and clear data completely only
when the node is reclaimed. This makes dtfs preserve unix open file
semantics.

don't allow to read or write a directory

dtfs (*): a very simple in-memory file system providing an example on
how to use libpuffs

this is not installed into the binary distribution just yet

*) you can call it either "Delectable Test File System" or
"Detrempe File System", depending on what you think will result
in more puffing

fix build of puffs examples; need _KERNTYPES for register_t

I wasn't going to add any more silly examples, but I'll bite for
this one, since it's a good exercise ..

Add icfs, which does the same thing as the refuse-based icfs agc
added earlier this week, i.e. null-mounts & converts the entire
namespace to lowercase. However, it's a fun comparison, since this
is implemented in a completely different fashion from the refuse
version.

s/demostrates/demonstrates/ in comment.

branches: 1.11.72;
fix more A0

Add -p for presenting the directory listing in the original case.

branches: 1.9.6; 1.9.10;
Rototill.

Ok, ok, a few more words about it: stop holding puffs_cc as a holy
value and passing it around to almost every possible place (popquiz:
which kernel variable does this remind you of?). Instead, pass
the natural choice, puffs_usermount, and fetch puffs_cc via
puffs_cc_getcc() only in routines which actually need it. This
not only simplifies code, but (thanks to the introduction of
puffs_cc_getcc()) enables constructs which weren't previously sanely
possible, say layering as a curious example.

There's still a little to do on this front, but this was the major
fs interface blast.

use puffs_daemon() instead of daemon()

Actually, daemonize the file servers before mounting. I might require
at some point that the local protocol handler does not change after
the file system has been mounted.

Pull the daemonizing code out of the library mainloop into the file
servers. Calling daemon() (i.e. fork()ing) inside a library can
cause nice surprises for e.g. threaded programs. As discussed with
Greg Oster & others.

branches: 1.5.4;
* add mntfromname parameter to puffs_init()
* set it in file servers

PUFFS_KFLAG_NOCACHE became two, so introduce the command line options
-o nonamecache and -o nopagecache and adapt file systems where necessary.

cast tolower() arg to unsigned char

use puffs_null_setops()

I wasn't going to add any more silly examples, but I'll bite for
this one, since it's a good exercise ..

Add icfs, which does the same thing as the refuse-based icfs agc
added earlier this week, i.e. null-mounts & converts the entire
namespace to lowercase. However, it's a fun comparison, since this
is implemented in a completely different fashion from the refuse
version.

fix build of puffs examples; need _KERNTYPES for register_t

make pg_config overridable

branches: 1.1.2; 1.1.8;
puffs file system server backed by postgresql

puffs file system server backed by postgresql

puffs file system server backed by postgresql

spelling and grammar fixes in comments.

branches: 1.2.54;
tweak some sql statements to improve chances to use the index.

puffs file system server backed by postgresql

fix user-after-free bug

do setlocale so that we can print localized messages from libpq correctly.

branches: 1.2.2;
- enable writeback cache and namecache.
- use setback hack to reduce number of puffs OPs.

branches: 1.1.2;
puffs file system server backed by postgresql

comment

remove FK references as it creates more problems than it solves.
particularly, it involves shared lock on the referenced table
and causes frequent deadlock.

reduce number of SQL statements for inactivate

branches: 1.1.2;
puffs file system server backed by postgresql

puffs file system server backed by postgresql

setlabel: save SQL statements by caching the last label

abuse application_name to show the last puffs activity for the connection.

branches: 1.1.2;
puffs file system server backed by postgresql

abuse application_name to show the last puffs activity for the connection.

branches: 1.1.2;
puffs file system server backed by postgresql

puffs file system server backed by postgresql

puffs file system server backed by postgresql

de-foodify comment

abuse application_name to show the last puffs activity for the connection.

reduce number of SQL statements for inactivate

- enable writeback cache and namecache.
- use setback hack to reduce number of puffs OPs.

branches: 1.1.2;
puffs file system server backed by postgresql

don't bother to call lo_close.
as we ever open a few LOs at most in a transaction, just let them be closed
automatically at the end of the transaction.

reduce number of SQL statements for inactivate

branches: 1.3.2;
isempty: fix a query result type.

tweak some sql statements to improve chances to use the index.

puffs file system server backed by postgresql

reduce number of SQL statements for inactivate

branches: 1.1.2;
puffs file system server backed by postgresql

puffs file system server backed by postgresql

puffs file system server backed by postgresql

fix build of puffs examples; need _KERNTYPES for register_t

example null file system built on top of the null layer in libpuffs

puffs_setfhsize() in init

fix more A0

branches: 1.16.6; 1.16.10;
use puffs_daemon() instead of daemon()

Actually, daemonize the file servers before mounting. I might require
at some point that the local protocol handler does not change after
the file system has been mounted.

Pull the daemonizing code out of the library mainloop into the file
servers. Calling daemon() (i.e. fork()ing) inside a library can
cause nice surprises for e.g. threaded programs. As discussed with
Greg Oster & others.

branches: 1.13.4;
* add mntfromname parameter to puffs_init()
* set it in file servers

use puffs_null_setops()

fix this also, had a similar rototill-typo as rot13fs

Move puffs to a two clause license where it already isn't so. And
as agc pointed out, even files with the third clause were already
effectively two clause because of a slight bug in the language...

reflect changes in fs mount: use puffs_mount() instead of
puffs_domount() & puffs_start()

allow to mount nullfs types only from directories
TODO: generalize

Instead of keeping on adding parameters to puffs_mount(), make it
only take the bare essentials, which currently means removing
"maxreqlen" from the argument list (all current callers I'm aware
of set it as 0 anyway). Introduce puffs_init(), which provides a
context for setting various parameters and puffs_domount(), which
can be used to mount the file system. Keep puffs_mount() as a
shortcut for the above two for simple file systems.

Bump development ABI version to 13. After all, it's Friday the 13th.
Watch out! Bad things can happen on Friday the 13th. --No carrier--

Hide struct puffs_usermount from the rest of the world and provide
accessors for interesting data in it. Namely, you can now get
pu->pu_privdata with puffs_getspecific(), pu->pu_pn_root with
puffs_set/getroot() and pu->pu_maxreqlen with puffs_getmaxreqlen().

support reclaim

use new style to indicate rootpath

* register fsync operation
* test for -s, which causes no detach (don't need to remember to
do follow-dances in gdb because of fork() used in daemon())

* initialize pflags properly
* make 'dump' imply 'don't detach'

example null file system built on top of the null layer in libpuffs

fix build of puffs examples; need _KERNTYPES for register_t

Gur Zbba vf Jnavat Perfprag (19% bs Shyy)

Add a little layering experiment, which both exercises the
componentname modification feature of libpuffs and tries to do
layering (just a little too hardcoded for comfort, fow now). This
simply uses the puffs nullfs to present all data and paths in rot13.
You can even mount it twice for extra fun.

fix more A0

branches: 1.16.6; 1.16.10;
Rototill.

Ok, ok, a few more words about it: stop holding puffs_cc as a holy
value and passing it around to almost every possible place (popquiz:
which kernel variable does this remind you of?). Instead, pass
the natural choice, puffs_usermount, and fetch puffs_cc via
puffs_cc_getcc() only in routines which actually need it. This
not only simplifies code, but (thanks to the introduction of
puffs_cc_getcc()) enables constructs which weren't previously sanely
possible, say layering as a curious example.

There's still a little to do on this front, but this was the major
fs interface blast.

use puffs_daemon() instead of daemon()

Actually, daemonize the file servers before mounting. I might require
at some point that the local protocol handler does not change after
the file system has been mounted.

Pull the daemonizing code out of the library mainloop into the file
servers. Calling daemon() (i.e. fork()ing) inside a library can
cause nice surprises for e.g. threaded programs. As discussed with
Greg Oster & others.

branches: 1.12.4;
* add mntfromname parameter to puffs_init()
* set it in file servers

Just to demonstrate namemod a bit further, make this flip the case
of filenames / contents instead of rot13 if -f is given.

use puffs_null_setops()

fix typo from previous rototill, makes this work again

Move puffs to a two clause license where it already isn't so. And
as agc pointed out, even files with the third clause were already
effectively two clause because of a slight bug in the language...

reflect changes in fs mount: use puffs_mount() instead of
puffs_domount() & puffs_start()

allow to mount nullfs types only from directories
TODO: generalize

Instead of keeping on adding parameters to puffs_mount(), make it
only take the bare essentials, which currently means removing
"maxreqlen" from the argument list (all current callers I'm aware
of set it as 0 anyway). Introduce puffs_init(), which provides a
context for setting various parameters and puffs_domount(), which
can be used to mount the file system. Keep puffs_mount() as a
shortcut for the above two for simple file systems.

Bump development ABI version to 13. After all, it's Friday the 13th.
Watch out! Bad things can happen on Friday the 13th. --No carrier--

Hide struct puffs_usermount from the rest of the world and provide
accessors for interesting data in it. Namely, you can now get
pu->pu_privdata with puffs_getspecific(), pu->pu_pn_root with
puffs_set/getroot() and pu->pu_maxreqlen with puffs_getmaxreqlen().

adapt to new readdir signature. no functional change

do reclaim

Gur Zbba vf Jnavat Perfprag (19% bs Shyy)

Add a little layering experiment, which both exercises the
componentname modification feature of libpuffs and tries to do
layering (just a little too hardcoded for comfort, fow now). This
simply uses the puffs nullfs to present all data and paths in rot13.
You can even mount it twice for extra fun.