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Revision 1.10, Fri Jan 7 16:02:32 2011 UTC (9 years, 2 months ago) by pooka
Branch: MAIN
CVS Tags: yamt-pagecache-tag8, yamt-pagecache-base9, yamt-pagecache-base8, yamt-pagecache-base7, yamt-pagecache-base6, yamt-pagecache-base5, yamt-pagecache-base4, yamt-pagecache-base3, yamt-pagecache-base2, yamt-pagecache-base, yamt-pagecache, tls-maxphys-base, tls-maxphys, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, phil-wifi-base, phil-wifi-20191119, phil-wifi-20190609, phil-wifi, pgoyette-localcount-base, pgoyette-localcount-20170426, pgoyette-localcount-20170320, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount, pgoyette-compat-merge-20190127, pgoyette-compat-base, pgoyette-compat-20190127, pgoyette-compat-20190118, pgoyette-compat-1226, pgoyette-compat-1126, pgoyette-compat-1020, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315, pgoyette-compat, perseant-stdc-iso10646-base, perseant-stdc-iso10646, netbsd-9-base, netbsd-9-0-RELEASE, netbsd-9-0-RC2, netbsd-9-0-RC1, netbsd-9, netbsd-8-base, netbsd-8-2-RELEASE, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, netbsd-7-nhusb-base-20170116, netbsd-7-nhusb-base, netbsd-7-nhusb, netbsd-7-base, netbsd-7-2-RELEASE, netbsd-7-1-RELEASE, netbsd-7-1-RC2, netbsd-7-1-RC1, netbsd-7-1-2-RELEASE, netbsd-7-1-1-RELEASE, netbsd-7-1, netbsd-7-0-RELEASE, netbsd-7-0-RC3, netbsd-7-0-RC2, netbsd-7-0-RC1, netbsd-7-0-2-RELEASE, netbsd-7-0-1-RELEASE, netbsd-7-0, netbsd-7, netbsd-6-base, netbsd-6-1-RELEASE, netbsd-6-1-RC4, netbsd-6-1-RC3, netbsd-6-1-RC2, netbsd-6-1-RC1, netbsd-6-1-5-RELEASE, netbsd-6-1-4-RELEASE, netbsd-6-1-3-RELEASE, netbsd-6-1-2-RELEASE, netbsd-6-1-1-RELEASE, netbsd-6-1, netbsd-6-0-RELEASE, netbsd-6-0-RC2, netbsd-6-0-RC1, netbsd-6-0-6-RELEASE, netbsd-6-0-5-RELEASE, netbsd-6-0-4-RELEASE, netbsd-6-0-3-RELEASE, netbsd-6-0-2-RELEASE, netbsd-6-0-1-RELEASE, netbsd-6-0, netbsd-6, matt-nb8-mediatek-base, matt-nb8-mediatek, matt-nb6-plus-nbase, matt-nb6-plus-base, matt-nb6-plus, localcount-20160914, cherry-xenmp-base, cherry-xenmp, bouyer-socketcan-base1, bouyer-socketcan-base, bouyer-socketcan, bouyer-quota2-nbase, bouyer-quota2-base, bouyer-quota2, agc-symver-base, agc-symver, HEAD
Changes since 1.9: +2 -4 lines

Make P2K_WIZARDUID require a valid integer instead of defaulting to root.

.\"     $NetBSD: p2k.3,v 1.10 2011/01/07 16:02:32 pooka Exp $
.\"
.\" Copyright (c) 2008 Antti Kantee.  All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\"
.Dd January 7, 2011
.Dt P2K 3
.Os
.Sh NAME
.Nm p2k
.Nd puffs to kernel vfs translation library
.Sh LIBRARY
p2k Library (libp2k, \-lp2k)
.Sh SYNOPSIS
.In rump/p2k.h
.Ft struct p2k_mount *
.Fn p2k_init "uint32_t puffs_flags"
.Ft void
.Fn p2k_cancel "struct p2k_mount *p2m" "int error"
.Ft int
.Fo p2k_setup_fs
.Fa "struct p2k_mount *p2m" "const char *vfsname" "const char *devpath"
.Fa "const char *mountpath" "int mntflags" "void *arg" "size_t alen"
.Fc
.Fo p2k_setup_diskfs
.Fa "struct p2k_mount *p2m" "const char *vfsname" "const char *devpath"
.Fa "int partition" "const char *mountpath" "int mntflags"
.Fa "void *arg" "size_t alen"
.Fc
.Ft int
.Fn p2k_mainloop "struct p2k_mount *p2m"
.Ft int
.Fo p2k_run_fs
.Fa "const char *vfsname" "const char *devpath" "const char *mountpath"
.Fa "int mntflags" "void *arg" "size_t alen" "uint32_t puffs_flags"
.Fc
.Ft int
.Fo p2k_run_diskfs
.Fa "const char *vfsname" "const char *devpath" "int partition"
.Fa "const char *mountpath" "int mntflags" "void *arg" "size_t alen"
.Fa "uint32_t puffs_flags"
.Fc
.Sh DESCRIPTION
The
.Nm
library translates the puffs protocol to the kernel
.Xr vfs 9
protocol and back again.
It can therefore be used to mount and run kernel file system code as
a userspace daemon.
.Pp
Calling the library interface function mounts the file system and,
if succesful, starts handling requests.
The parameters are handled by
.Fn ukfs_mount
(see
.Xr ukfs 3 ) ,
with the exception that
.Fa mountpath
and
.Fa puffs_flags
are handled by
.Xr puffs 3 .
The "run_fs" variants of the interfaces are provided as a convenience
for the common case.
They execute all of init, setup and mainloop in one call.
.Sh ENVIRONMENT
The following environment variables affect the behaviour of
.Nm .
They are useful mostly for debugging purposes.
The flags are environment variables because typically the command line
arguments to
.Nm
utilities are parsed using versions not aware of
.Nm
options; for example, the
.Xr rump_cd9660 8
arguments are really parsed by
.Xr mount_cd9660 8 .
.Bl -tag -width "XP2K_NOCACHE_PAGE" -offset 2n
.It Dv P2K_DEBUG
Do not detach from tty and print information about each puffs operation.
In case the daemon receives
.Dv SIGINFO
(typically from ctrl-T), it dumps out the status of the mount point.
Sending
.Dv SIGUSR1
causes a dump of all the vnodes (verbose).
.It Dv P2K_NODETACH
Do not detach from tty.
.It Dv P2K_NOCACHE_PAGE
Do not use the puffs page cache.
.It Dv P2K_NOCACHE_NAME
Do not use the puffs name cache.
.It Dv P2K_NOCACHE
Do not use the puffs page or name cache.
.It Dv P2K_WIZARDUID
If set, use the value of the variable to determine the UID of the
caller of each operation instead of the actual caller supplied by
.Xr puffs 3 .
This can be used for example to simplify modifying an OS installation's
root image as a non-root user.
.El
.Sh SEE ALSO
.Xr puffs 3 ,
.Xr rump 3 ,
.Xr ukfs 3 ,
.Xr rump_cd9660 8 ,
.Xr rump_efs 8 ,
.Xr rump_ext2fs 8 ,
.Xr rump_ffs 8 ,
.Xr rump_hfs 8 ,
.Xr rump_lfs 8 ,
.Xr rump_msdos 8 ,
.Xr rump_nfs 8 ,
.Xr rump_ntfs 8 ,
.Xr rump_smbfs 8 ,
.Xr rump_syspuffs 8 ,
.Xr rump_sysvbfs 8 ,
.Xr rump_tmpfs 8 ,
.Xr rump_udf 8