FreeBSD/Linux Kernel Cross Reference
sys/geom/part/g_part_if.m

     #-
     # Copyright (c) 2006-2009 Marcel Moolenaar
     # 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 ``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 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 SUCH DAMAGE.
    #
    # $FreeBSD$
    
    #include <sys/param.h>
    #include <sys/lock.h>
    #include <sys/malloc.h>
    #include <sys/mutex.h>
    #include <sys/sbuf.h>
    #include <sys/bus.h>
    #include <machine/bus.h>
    #include <sys/systm.h>
    #include <geom/geom.h>
    #include <geom/part/g_part.h>
    
    # The G_PART scheme interface.
    
    INTERFACE g_part;
    
    # Default implementations of methods.
    CODE {
            static void
            default_fullname(struct g_part_table *table,
                struct g_part_entry *entry, struct sbuf *sb, const char *pfx)
            {
                    char buf[32];
    
                    sbuf_printf(sb, "%s%s%s", pfx, g_part_separator,
                        G_PART_NAME(table, entry, buf, sizeof(buf)));
            }
    
            static struct g_provider *
            default_new_provider(struct g_part_table *table, struct g_geom *gp,
                struct g_part_entry *entry, const char *pfx)
            {
                    struct g_provider *ret;
                    struct sbuf *sb;
    
                    sb = sbuf_new_auto();
                    G_PART_FULLNAME(table, entry, sb, pfx);
                    sbuf_finish(sb);
                    ret = g_new_providerf(gp, "%s", sbuf_data(sb));
                    sbuf_delete(sb);
                    return (ret);
            }
    
            static void
            default_add_alias(struct g_part_table *table, struct g_provider *pp,
                struct g_part_entry *entry, const char *pfx)
            {
                    struct sbuf *sb;
    
                    sb = sbuf_new_auto();
                    G_PART_FULLNAME(table, entry, sb, pfx);
                    sbuf_finish(sb);
                    g_provider_add_alias(pp, "%s", sbuf_data(sb));
                    sbuf_delete(sb);
            }
    
            static int
            default_precheck(struct g_part_table *t __unused,
                enum g_part_ctl r __unused, struct g_part_parms *p __unused)
            {
                    return (0);
            }
    
            static int
            default_resize(struct g_part_table *t __unused,
                struct g_part_entry *e __unused, struct g_part_parms *p __unused)
            {
                    return (ENOSYS);
            }
    
            static int
            default_recover(struct g_part_table *t __unused)
            {
                   return (ENOSYS);
           }
   
           static int
           default_ioctl(struct g_part_table *table __unused, struct g_provider *pp __unused,
               u_long cmd __unused, void *data __unused, int fflag __unused,
               struct thread *td __unused)
           {
                   return (ENOIOCTL);
           }
   
           static int
           default_getattr(struct g_part_table *table __unused,
               struct g_part_entry *entry __unused, struct bio *bp __unused)
           {
                   return (ENOIOCTL);
           }
   };
   
   # add() - scheme specific processing for the add verb.
   METHOD int add {
           struct g_part_table *table;
           struct g_part_entry *entry;
           struct g_part_parms *gpp;
   };
   
   # add_alias() - Create aliases for the partition's provider with the given
   # alias prefixes.
   METHOD void add_alias {
           struct g_part_table *table;
           struct g_provider *pp;
           struct g_part_entry *entry;
           const char *pfx;
   } DEFAULT default_add_alias;
   
   # bootcode() - scheme specific processing for the bootcode verb.
   METHOD int bootcode {
           struct g_part_table *table;
           struct g_part_parms *gpp;
   };
   
   # create() - scheme specific processing for the create verb.
   METHOD int create {
           struct g_part_table *table;
           struct g_part_parms *gpp;
   };
   
   # destroy() - scheme specific processing for the destroy verb.
   METHOD int destroy {
           struct g_part_table *table;
           struct g_part_parms *gpp;
   };
   
   # dumpconf()
   METHOD void dumpconf {
           struct g_part_table *table;
           struct g_part_entry *entry;
           struct sbuf *sb;
           const char *indent;
   };
   
   # dumpto() - return whether the partition can be used for kernel dumps.
   METHOD int dumpto {
           struct g_part_table *table;
           struct g_part_entry *entry;
   };
   
   # fullname() - write the name of the given partition entry to the sbuf.
   METHOD void fullname {
           struct g_part_table *table;
           struct g_part_entry *entry;
           struct sbuf *sb;
           const char *pfx;
   } DEFAULT default_fullname;
   
   # ioctl() - implement historic ioctls, perhaps.
   METHOD int ioctl {
           struct g_part_table *table;
           struct g_provider *pp;
           u_long cmd;
           void *data;
           int fflag;
           struct thread *td;
   } DEFAULT default_ioctl;
   
   # modify() - scheme specific processing for the modify verb.
   METHOD int modify {
           struct g_part_table *table;
           struct g_part_entry *entry;
           struct g_part_parms *gpp;
   };
   
   # new_provider() - Create the partition's provider(s).
   METHOD struct g_provider * new_provider {
           struct g_part_table *table;
           struct g_geom *gp;
           struct g_part_entry *entry;
           const char *pfx;
   } DEFAULT default_new_provider;
   
   # resize() - scheme specific processing for the resize verb.
   METHOD int resize {
           struct g_part_table *table;
           struct g_part_entry *entry;
           struct g_part_parms *gpp;
   } DEFAULT default_resize;
   
   # name() - return the name of the given partition entry.
   # Typical names are "p1", "s0" or "c".
   METHOD const char * name {
           struct g_part_table *table;
           struct g_part_entry *entry;
           char *buf;
           size_t bufsz;
   };
   
   # precheck() - method to allow schemes to check the parameters given
   # to the mentioned ctl request. This only applies to the requests that
   # operate on a GEOM. In other words, it does not apply to the create
   # request.
   # It is allowed (intended actually) to change the parameters according
   # to the schemes needs before they are used. Returning an error will
   # terminate the request immediately.
   METHOD int precheck {
           struct g_part_table *table;
           enum g_part_ctl req;
           struct g_part_parms *gpp;
   } DEFAULT default_precheck;
   
   # probe() - probe the provider attached to the given consumer for the
   # existence of the scheme implemented by the G_PART interface handler.
   METHOD int probe {
           struct g_part_table *table;
           struct g_consumer *cp;
   };
   
   # read() - read the on-disk partition table into memory.
   METHOD int read {
           struct g_part_table *table;
           struct g_consumer *cp;
   };
   
   # recover() - scheme specific processing for the recover verb.
   METHOD int recover {
           struct g_part_table *table;
   } DEFAULT default_recover;
   
   # setunset() - set or unset partition entry attributes.
   METHOD int setunset {
           struct g_part_table *table;
           struct g_part_entry *entry;
           const char *attrib;
           unsigned int set;
   };
   
   # type() - return a string representation of the partition type.
   # Preferably, the alias names.
   METHOD const char * type {
           struct g_part_table *table;
           struct g_part_entry *entry;
           char *buf;
           size_t bufsz;
   };
   
   # write() - write the in-memory partition table to disk.
   METHOD int write {
           struct g_part_table *table;
           struct g_consumer *cp;
   };
   
   # getattr() - get the specified attribute, if any
   METHOD int getattr {
           struct g_part_table *table;
           struct g_part_entry *entry;
           struct bio *bp;
   } DEFAULT default_getattr;

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