introduce a SOL_LOCAL for unix-domain socket level socket options
as an alias of the current 0 used for these options, as in FreeBSD.

reviewed by many.

fix typo

branches: 1.24.14;
remove dup function

Make FUSE socket buffer tunable

When dealing with high I/O throughput, we could run out of buffer
space if the filesystem was not consuming requests fast enough.
Here we slightly raise the buffer size, and we make it tunable
through the PERFUSE_BUFSIZE environment variable so that we can
cope with higher requirement later.

While there, document PERFUSE_OPTIONS environment variable.

branches: 1.22.2;
Remove a warning that happens when the filesystem cleanly exits. Just
display a message when running in debug mode.

branches: 1.21.10;
- Fix same vnodes associated with multiple cookies
The scheme used to retreive known nodes on lookup was flawed, as it only
used parent and name. This produced a different cookie for the same file
if it was renamed, when looking up ../ or when dealing with multiple files
associated with the same name through link(2).

We therefore abandon the use of node name and introduce hashed lists of
inodes. This causes a huge rewrite of reclaim code, which do not attempt
to keep parents allocated until all their children are reclaimed

- Fix race conditions in reclaim
There are a few situations where we issue multiple FUSE operations for
a PUFFS operation. On reclaim, we therefore have to wait for all FUSE
operation to complete, not just the current exchanges. We do this by
introducing node reference count with node_ref() and node_rele().

- Detect data loss caused by FAF
VOP_PUTPAGES causes FAF writes where the kernel does not check the
operation result. At least issue a warning on error.

- Enjoy FAF shortcut on setattr
No need to wait for the result if the kernel does not want it. There is
however an exception for setattr that touch the size, we need to wait
for completion because we have other operations queued for after the
resize.

- Fix fchmod() on write-open file
fchmod() on a node open with write privilege will send setattr with both mode and size set. This confuses some FUSE filesystem. Therefore we send two FUSE operations, one for mode, and one for size.

- Remove node TTL handling for netbsd-5 for simplicity sake. The code
still builds on netbsd-5 but does not have the node TTL feature anymore.
It works fine with kernel support on netbsd-6.

branches: 1.20.2;
Mark perfused_panic as dead. Canonical form of infinite loops is
for (;;). Remove completely redundant NOTREACHED markers.

Make sure perfused exit when the filesystem crashed, so that unmount
is done. Failure to do so caused deadlocks, with operation that
held a lock on the root vnode and got stuck in perfused forever.

Approved by releng.

- remove dup included files
- use intptr_t instead of long where appropriate
- use perfused_ instead of perfuse_ for our own functions.
- more static
Fixes namespace collision of perfuse_mount with this and libperfuse.

branches: 1.17.2;
Fix the confusion between nodeid and inode numbers

Fast backward code to 1989 and use ANSI C consistently. Use __dead.

Fix warning

Fix creds passed to FUSE when requests are done on behalf of the kernel.
We previously sent uid/gid set to -1, we now set it to 0.

Use SOCK_SEQPACKET in perfuse if available. This fix file operations hangs
where the FUSE filesyste replied to an operation and got an ENOBUFS it did
not handle.

We now are also able to cleanly unmount

Enable the build of perfused and libperfuse

Display actual error from FUSE on failures

- fix warnings
- try to handle ENOBUFS in a nicer way
- use errx() for usage message, not err(), as we do not waht strerror(errno)

Remove code supporting SOCK_STREAM, as SOCK_DGRAM works fine

Interm hack raising buffers for /dev/fuse socket used in the filesystem.
This works around read(2) system callsfailing with ENOBUFS.

This is a hack bedause there is no way to know that 4 * FUSE_BUFSIZE
will be enough to hold queued FUSE frames. It seems good enough at
mine.

- Add debug santity checks
- Do not request peer creds anymore once we have them.

- Use SOCK_DGRAM instead of SOCK_STREAM, as the filesystem seems to
assume datagram semantics: when using SOCK_STREAM, if perfused sends
frames faster than the filesystem consumes them, it will grab multiple
frames at once and discard anything beyond the first one. For now the
code can work both with SOCK_DGRAM and SOCK_STREAM, but SOCK_STREAM
support will probably have to be removed for the sake of readability.

- Remeber to sync parent directories when moving a node

- In debug output, display the requeue type (readdir, write, etc...)

- Do not checkfor peer credentials when perfused is autostarted and
therefore runs with filesystem privileges

- shut up warnings and debug messages when perfused is autostarted

- make perfused patch modifiable with CFLAGS for easier pkgsrc integration

- Fix build warnings

More LP64 fixes

Build fixes for LP64

- if perfused is not already started (cannot connect to /dev/fuse),
FUSE filesystems will attempt to start it on their own, and will
communicate using a socketpair

- do not advertise NULL file handle as being valid when sending themback to the FUSE filesystem.

- unmount if we cannot talk to the FUSE process anymore

- set calling process gid properly

- debug message cleanup

perfused(8) creates a /dev/fuse socket and performs PUFFS to FUSE relaying.
This is still a work in progress.

fix typo

remove dup function

Make FUSE socket buffer tunable

When dealing with high I/O throughput, we could run out of buffer
space if the filesystem was not consuming requests fast enough.
Here we slightly raise the buffer size, and we make it tunable
through the PERFUSE_BUFSIZE environment variable so that we can
cope with higher requirement later.

While there, document PERFUSE_OPTIONS environment variable.

branches: 1.22.2;
Remove a warning that happens when the filesystem cleanly exits. Just
display a message when running in debug mode.

branches: 1.21.10;
- Fix same vnodes associated with multiple cookies
The scheme used to retreive known nodes on lookup was flawed, as it only
used parent and name. This produced a different cookie for the same file
if it was renamed, when looking up ../ or when dealing with multiple files
associated with the same name through link(2).

We therefore abandon the use of node name and introduce hashed lists of
inodes. This causes a huge rewrite of reclaim code, which do not attempt
to keep parents allocated until all their children are reclaimed

- Fix race conditions in reclaim
There are a few situations where we issue multiple FUSE operations for
a PUFFS operation. On reclaim, we therefore have to wait for all FUSE
operation to complete, not just the current exchanges. We do this by
introducing node reference count with node_ref() and node_rele().

- Detect data loss caused by FAF
VOP_PUTPAGES causes FAF writes where the kernel does not check the
operation result. At least issue a warning on error.

- Enjoy FAF shortcut on setattr
No need to wait for the result if the kernel does not want it. There is
however an exception for setattr that touch the size, we need to wait
for completion because we have other operations queued for after the
resize.

- Fix fchmod() on write-open file
fchmod() on a node open with write privilege will send setattr with both mode and size set. This confuses some FUSE filesystem. Therefore we send two FUSE operations, one for mode, and one for size.

- Remove node TTL handling for netbsd-5 for simplicity sake. The code
still builds on netbsd-5 but does not have the node TTL feature anymore.
It works fine with kernel support on netbsd-6.

branches: 1.20.2;
Mark perfused_panic as dead. Canonical form of infinite loops is
for (;;). Remove completely redundant NOTREACHED markers.

Make sure perfused exit when the filesystem crashed, so that unmount
is done. Failure to do so caused deadlocks, with operation that
held a lock on the root vnode and got stuck in perfused forever.

Approved by releng.

- remove dup included files
- use intptr_t instead of long where appropriate
- use perfused_ instead of perfuse_ for our own functions.
- more static
Fixes namespace collision of perfuse_mount with this and libperfuse.

branches: 1.17.2;
Fix the confusion between nodeid and inode numbers

Fast backward code to 1989 and use ANSI C consistently. Use __dead.

Fix warning

Fix creds passed to FUSE when requests are done on behalf of the kernel.
We previously sent uid/gid set to -1, we now set it to 0.

Use SOCK_SEQPACKET in perfuse if available. This fix file operations hangs
where the FUSE filesyste replied to an operation and got an ENOBUFS it did
not handle.

We now are also able to cleanly unmount

Enable the build of perfused and libperfuse

Display actual error from FUSE on failures

- fix warnings
- try to handle ENOBUFS in a nicer way
- use errx() for usage message, not err(), as we do not waht strerror(errno)

Remove code supporting SOCK_STREAM, as SOCK_DGRAM works fine

Interm hack raising buffers for /dev/fuse socket used in the filesystem.
This works around read(2) system callsfailing with ENOBUFS.

This is a hack bedause there is no way to know that 4 * FUSE_BUFSIZE
will be enough to hold queued FUSE frames. It seems good enough at
mine.

- Add debug santity checks
- Do not request peer creds anymore once we have them.

- Use SOCK_DGRAM instead of SOCK_STREAM, as the filesystem seems to
assume datagram semantics: when using SOCK_STREAM, if perfused sends
frames faster than the filesystem consumes them, it will grab multiple
frames at once and discard anything beyond the first one. For now the
code can work both with SOCK_DGRAM and SOCK_STREAM, but SOCK_STREAM
support will probably have to be removed for the sake of readability.

- Remeber to sync parent directories when moving a node

- In debug output, display the requeue type (readdir, write, etc...)

- Do not checkfor peer credentials when perfused is autostarted and
therefore runs with filesystem privileges

- shut up warnings and debug messages when perfused is autostarted

- make perfused patch modifiable with CFLAGS for easier pkgsrc integration

- Fix build warnings

More LP64 fixes

Build fixes for LP64

- if perfused is not already started (cannot connect to /dev/fuse),
FUSE filesystems will attempt to start it on their own, and will
communicate using a socketpair

- do not advertise NULL file handle as being valid when sending themback to the FUSE filesystem.

- unmount if we cannot talk to the FUSE process anymore

- set calling process gid properly

- debug message cleanup

perfused(8) creates a /dev/fuse socket and performs PUFFS to FUSE relaying.
This is still a work in progress.

remove dup function

Make FUSE socket buffer tunable

When dealing with high I/O throughput, we could run out of buffer
space if the filesystem was not consuming requests fast enough.
Here we slightly raise the buffer size, and we make it tunable
through the PERFUSE_BUFSIZE environment variable so that we can
cope with higher requirement later.

While there, document PERFUSE_OPTIONS environment variable.

branches: 1.22.2;
Remove a warning that happens when the filesystem cleanly exits. Just
display a message when running in debug mode.

branches: 1.21.10;
- Fix same vnodes associated with multiple cookies
The scheme used to retreive known nodes on lookup was flawed, as it only
used parent and name. This produced a different cookie for the same file
if it was renamed, when looking up ../ or when dealing with multiple files
associated with the same name through link(2).

We therefore abandon the use of node name and introduce hashed lists of
inodes. This causes a huge rewrite of reclaim code, which do not attempt
to keep parents allocated until all their children are reclaimed

- Fix race conditions in reclaim
There are a few situations where we issue multiple FUSE operations for
a PUFFS operation. On reclaim, we therefore have to wait for all FUSE
operation to complete, not just the current exchanges. We do this by
introducing node reference count with node_ref() and node_rele().

- Detect data loss caused by FAF
VOP_PUTPAGES causes FAF writes where the kernel does not check the
operation result. At least issue a warning on error.

- Enjoy FAF shortcut on setattr
No need to wait for the result if the kernel does not want it. There is
however an exception for setattr that touch the size, we need to wait
for completion because we have other operations queued for after the
resize.

- Fix fchmod() on write-open file
fchmod() on a node open with write privilege will send setattr with both mode and size set. This confuses some FUSE filesystem. Therefore we send two FUSE operations, one for mode, and one for size.

- Remove node TTL handling for netbsd-5 for simplicity sake. The code
still builds on netbsd-5 but does not have the node TTL feature anymore.
It works fine with kernel support on netbsd-6.

branches: 1.20.2;
Mark perfused_panic as dead. Canonical form of infinite loops is
for (;;). Remove completely redundant NOTREACHED markers.

Make sure perfused exit when the filesystem crashed, so that unmount
is done. Failure to do so caused deadlocks, with operation that
held a lock on the root vnode and got stuck in perfused forever.

Approved by releng.

- remove dup included files
- use intptr_t instead of long where appropriate
- use perfused_ instead of perfuse_ for our own functions.
- more static
Fixes namespace collision of perfuse_mount with this and libperfuse.

branches: 1.17.2;
Fix the confusion between nodeid and inode numbers

Fast backward code to 1989 and use ANSI C consistently. Use __dead.

Fix warning

Fix creds passed to FUSE when requests are done on behalf of the kernel.
We previously sent uid/gid set to -1, we now set it to 0.

Use SOCK_SEQPACKET in perfuse if available. This fix file operations hangs
where the FUSE filesyste replied to an operation and got an ENOBUFS it did
not handle.

We now are also able to cleanly unmount

Enable the build of perfused and libperfuse

Display actual error from FUSE on failures

- fix warnings
- try to handle ENOBUFS in a nicer way
- use errx() for usage message, not err(), as we do not waht strerror(errno)

Remove code supporting SOCK_STREAM, as SOCK_DGRAM works fine

Interm hack raising buffers for /dev/fuse socket used in the filesystem.
This works around read(2) system callsfailing with ENOBUFS.

This is a hack bedause there is no way to know that 4 * FUSE_BUFSIZE
will be enough to hold queued FUSE frames. It seems good enough at
mine.

- Add debug santity checks
- Do not request peer creds anymore once we have them.

- Use SOCK_DGRAM instead of SOCK_STREAM, as the filesystem seems to
assume datagram semantics: when using SOCK_STREAM, if perfused sends
frames faster than the filesystem consumes them, it will grab multiple
frames at once and discard anything beyond the first one. For now the
code can work both with SOCK_DGRAM and SOCK_STREAM, but SOCK_STREAM
support will probably have to be removed for the sake of readability.

- Remeber to sync parent directories when moving a node

- In debug output, display the requeue type (readdir, write, etc...)

- Do not checkfor peer credentials when perfused is autostarted and
therefore runs with filesystem privileges

- shut up warnings and debug messages when perfused is autostarted

- make perfused patch modifiable with CFLAGS for easier pkgsrc integration

- Fix build warnings

More LP64 fixes

Build fixes for LP64

- if perfused is not already started (cannot connect to /dev/fuse),
FUSE filesystems will attempt to start it on their own, and will
communicate using a socketpair

- do not advertise NULL file handle as being valid when sending themback to the FUSE filesystem.

- unmount if we cannot talk to the FUSE process anymore

- set calling process gid properly

- debug message cleanup

perfused(8) creates a /dev/fuse socket and performs PUFFS to FUSE relaying.
This is still a work in progress.