/usr/share/doc/HOWTO/ja-html/Linux-Kernel-Internals-3.html

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<H2><A NAME="s3">3.</A> <A HREF="Linux-Kernel-Internals.html#toc3">$B2>A[%U%!%$%k%7%9%F%`(B (VFS) </A></H2>



<H2><A NAME="ss3.1">3.1</A> <A HREF="Linux-Kernel-Internals.html#toc3.1">Inode $B%-%c%C%7%e$H(BDcache $B$H$NAj8_:nMQ(B</A>
</H2>


<P>$BJ#?t$N%U%!%$%k%7%9%F%`$r%5%]!<%H$9$k$?$a!"(B Linux $B$O(B VFS (Virtual Filesystem Switch)
$B$H$$$&FCJL$J%+!<%M%k%$%s%?!<%U%'!<%9%l%Y%k$r;}$C$F$$$^$9!#(B
$B$3$l$O(B SVR4 $B$+$iGI@8$7$?(B OS $B$K8+$i$l$k(B vnode/vfs $B%$%s%?!<%U%'!<%9$KNI$/;w$F$$$^$9(B
($B$b$H$b$H$O!"(BBSD $B$H(B Sun $B$KM3Mh$N<BAu$+$i$-$F$$$^$9(B)$B!#(B</P>
<P>Linux $B$N(B inode $B%-%c%C%7%e$O!"0l$D$N(B 977 $B9T$+$i$J$k%U%!%$%k(B <CODE>fs/inode.c</CODE> $B$K<BAu$5$l$F$$$^$9!#(B
$BFCI.$9$Y$-;v$K!"$3$N%U%!%$%k$O!"$3$N(B 5-7 $BG/$N4V$[$H$s$IJQ99$,$"$j$^$;$s$G$7$?!#(B
$B0lHV:G8e$K99?7$5$l$?$N$O!"$=$&(B 1.3.42 $B$N;~$J$N$G$9!#(B</P>
<P>Linux $B$N(B inode $B%-%c%C%7%e$N9=B$$O0J2<$NDL$j$G$9!#(B</P>
<P>
<OL>
<LI> 
$B3F(B inode $B$,%9!<%Q!<%V%m%C%/%]%$%s%?$H(B 32bit $B$N(B inode $BHV9f$NCM$K$h$C$F%O%C%7%e$5$l$k%0%m!<%P%k%O%C%7%e%F!<%V%k(B <CODE>inode_hashtable</CODE>$B!#(B $B%9!<%Q!<%V%m%C%/$NL5$$(B inode (<CODE>inode->i_sb == NULL</CODE>) $B$O!"Be$j$K(B<CODE>anon_hash_chain</CODE>$B$G;O$^$k%@%V%k%j%s%/%j%9%H$X$H$D$J$,$l$k!#F?L>(B inode$B$NNc$H$7$F!"(B<CODE>fs/inode.c:get_empty_inode()</CODE>$B$r8F$V$3$H$G!"(B<CODE>net/socket.c:sock_alloc()</CODE>$B$K$h$C$F:n$i$l$k%=%1%C%H$,$"$k!#(B
</LI>
<LI> <CODE>i_count>0</CODE> $B$+$D(B <CODE>i_nlink>0</CODE> $B$H$J$k(B inode $B$+$i$J$k%0%m!<%P%k%?%$%W$N(B in_use_list(<CODE>inode_in_use</CODE>)$B!#(Binode $B$O!"(B<CODE>get_empty_inode()</CODE> $B$H(B <CODE>get_new_inode()</CODE> $B$K$h$j?7$?$K3d$jEv$F$i$l!"(B<CODE>inode_in_use</CODE> $B%j%9%H$X$D$J$,$l$k!#(B
</LI>
<LI> <CODE>i_count = 0</CODE>$B$G$"$k$h$&$J(B $B%0%m!<%P%k%?%$%W$NL$;HMQ%j%9%H(B (<CODE>inode_unused</CODE>)$B!#(B
</LI>
<LI> <CODE>i_count>0</CODE>$B!"(B<CODE>i_nlink>0</CODE>$B$=$7$F(B<CODE>i_state &amp; I_DIRTY </CODE>$B$G$"$k$h$&$J(B inode $B$K$h$k%9!<%Q!<%V%m%C%/Kh$N1x$l$?%j%9%H(B(<CODE>sb->s_dirty</CODE>)$B!#(Binode$B$,(B dirty$B$N0u$,$D$1$i$l$?$i!"$=$l$O$d$O$j%O%C%7%e$K$J$C$F$$$k(B<CODE>sb->s_dirty</CODE>$B%j%9%H$KDI2C$5$l$k!#%9!<%Q!<%V%m%C%/Kh$K(B inode $B$N(B dirty $B%j%9%H$r4IM}$9$k$3$H$G!"(Binode $B$NF14|$r$9$P$d$/9T$&$3$H$,$G$-$k$h$&$K$J$k!#(B
</LI>
<LI> $B87L)$J0UL#$N(B inode $B%-%c%C%7%e(B -- <CODE>inode_cachep</CODE>$B$r8F$S=P$9(B SLAB $B%-%c%C%7%e!#(Binode $B%*%V%8%'%/%H$,3d$jEv$F$i$l$?$j!"2rJ|$5$l$?$j$9$k$H$-$O!"$3$N(B SLAB $B%-%c%C%7%e$+$i<hF@$5$l$?$j!"JV$5$l$?$j$9$k!#(B</LI>
</OL>
</P>
<P>$B$=$l$>$l$N%?%$%W%j%9%H$O!"(B<CODE>inode->i_list</CODE>$B$+$i;X$7<($5$l!"%O%C%7%e%F!<%V%k$O!"(B<CODE>inode->i_hash</CODE>$B$+$i7k$SIU$1$i$l$F$$$^$9!#3F(B inode $B$O(B $B$=$l$>$l%O%C%7%e%F!<%V%k$H#1<oN`$N$_$N%?%$%W%j%9%H(B(in_use, unused, $B$^$?$O(B dirty)$B$KF~$j$^$9!#(B</P>
<P>$B$3$N$9$Y$F$N%j%9%H$O0l$D$N%9%T%s%m%C%/(B<CODE>inode_lock</CODE>$B$K$h$jJ]8n$5$l$F$$$^$9!#(B</P>
<P>inode $B%-%c%C%7%e%5%V%7%9%F%`$O!"(B<CODE>inode_init()</CODE>$B4X?t$,!"(B<CODE>init/main.c:start_kernel()</CODE>$B$+$i8F$S=P$5$l$?;~$K=i4|2=$5$l$^$9!#$3$N4X?t$O!"(B<CODE>__init</CODE>$B$H%^!<%/$5$l$F$*$j!"$3$l$O$=$N8e!"$3$N%3!<%I$,2rJ|$5$l$F$7$^$&$3$H$r0UL#$7$F$$$^$9!#$3$N4X?t$O0l$D$N0z?t(B -- $B%7%9%F%`$NJ*M}%Z!<%8?t$rEO$7$^$9!#$3$N$3$H$+$i!"(Binode $B%-%c%C%7%e$OMxMQ2DG=$J%a%b%jNL$K0MB8$7$F7h$a$i$l$F$$$k$3$H$,$o$+$j$^$9!#$D$^$j!"$b$7==J,$JNL$N%a%b%j$,$"$l$P!"$h$jBg$-$J%O%C%7%e%F!<%V%k$r:n@.$9$k$H$$$&$3$H$G$9!#(B</P>
<P>inode $B%-%c%C%7%e$K4X$9$k$NM#0l$NE}7WE*>pJs$O!"MxMQ$5$l$F$$$J$$(Binode$B?t$G$9!#$3$l$O!"(B<CODE>inodes_stat.nr_unused</CODE>$B$K3JG<$5$l!"%U%!%$%k(B<CODE>/proc/sys/fs/inode-nr</CODE>$B$d(B<CODE>proc/sys/fs/inode-state</CODE>$B$rDL$7$F%f!<%6%W%m%0%i%`$+$i8+$k$3$H$,$G$-$^$9!#(B</P>
<P>$B$=$N$?$a!"@8$-$?%+!<%M%k$G<B9T$9$k(B <B>gdb</B> $B$+$i%j%9%H$r<h=P$9$3$H$,$G$-$^$9!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
(gdb) printf "%d\n", (unsigned long)(&amp;((struct inode *)0)->i_list)
8
(gdb) p inode_unused
$34 = 0xdfa992a8
(gdb) p (struct list_head)inode_unused
$35 = {next = 0xdfa992a8, prev = 0xdfcdd5a8}
(gdb) p ((struct list_head)inode_unused).prev
$36 = (struct list_head *) 0xdfcdd5a8
(gdb) p (((struct list_head)inode_unused).prev)->prev
$37 = (struct list_head *) 0xdfb5a2e8
(gdb) set $i = (struct inode *)0xdfb5a2e0
(gdb) p $i->i_ino
$38 = 0x3bec7
(gdb) p $i->i_count
$39 = {counter = 0x0}
</PRE>
<HR>
</CODE></BLOCKQUOTE>
</P>
<P>$B$3$3$G!"(B<CODE>include/linux/list.h</CODE> $B$N(B <CODE>list_entry()</CODE>$B%^%/%m$NDj5A$K$7$?$,$C$F(B<CODE>struct inode</CODE>$B$N%"%I%l%9(B (0xdfb5a3e0) $B$rF@$k$?$a$K!"%"%I%l%9(B 0xdfb5a2e8 $B$+$i(B8$B$r0z$$$F$$$k$3$H$KCm0U$7$^$7$g$&!#(B</P>
<P>inode $B%-%c%C%7%e$,$I$N$h$&$KF/$/$+M}2r$9$k$?$a$K!"(Bext2 $B%U%!%$%k%7%9%F%`$NDL>o$N%U%!%$%k$G!"(B
$B%*!<%W%s!"%/%m!<%:$5$l$k$H$-$N(B inode $B$N0l@8$r8+$F$$$-$^$7$g$&!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
fd = open("file", O_RDONLY);
close(fd);
</PRE>
<HR>
</CODE></BLOCKQUOTE>
</P>
<P><B>open(2)</B> $B%7%9%F%`%3!<%k$O(B <CODE>fs/open.c:sys_open()</CODE> $B4X?t$KDj5A$5$l$F$$$F!"<BBN$O(B <CODE>fs/open.c:file_open()</CODE> $B4X?t$,9T$C$F$$$^$9!#$3$N4X?t$O(B2$B$D$NItJ,$KJ,$1$i$l!"(B</P>
<P>
<OL>
<LI> <CODE>open_namei()</CODE>:  dentry$B$H(Bvfsmount$B9=B$BN$+$i$J$k(Bnamei$B%G!<%?9=B$BN$rKd$a$k!#(B
</LI>
<LI> <CODE>dentry_open()</CODE>: dentry$B$d(Bvfsmount$B$rM?$($k!#$3$N4X?t$O!"?7$7$$(B<CODE>struct file</CODE>$B$r3d$jEv$F!"Aj8_$K%j%s%/$9$k!#$^$?!"(Binode $B$,(B(<CODE>dentry->d_inode</CODE>$B$+$i(B inode $B$rM?$($k(B) <CODE>open_namei()</CODE> $B$GFI$_9~$^$l$k;~(B <CODE>inode->i_fop</CODE> $B$K%;%C%H$5$l$F$$$k%U%!%$%k%7%9%F%`$KFCM-$N(B <CODE>f_op->open()</CODE> $B%a%=%C%I$r8F$S=P$9!#(B</LI>
</OL>
</P>
<P><CODE>open_namei()</CODE> $B4X?t$O!"%U%!%$%k%7%9%F%`Kh$N(B<CODE>inode_operations->lookup()</CODE> $B%a%=%C%I$r5/F0$9$k(B <CODE>real_lookup()</CODE>$B$r$5$i$K8F$S=P$9(B <CODE>path_walk()</CODE> $B$K$h$C$F!"(B dentry $B%-%c%C%7%e$HAj8_:nMQ$r5/$3$7$^$9!#(B
$B$3$N%a%=%C%I$NLr3d$O!"?F%G%#%l%/%H%j$GL>A0$N0lCW$9$k%(%s%H%j$rC5$9$3$H$G!"$=$N(B inode $B$r<hF@$9$k$?$a(B <CODE>iget(sb, ino)</CODE> $B$r8F$S=P$7$F$$$^$9!#$3$N4X?t$O(B inode $B%-%c%C%7%e$X%"%/%;%9$7$^$9!#(B
inode $B$,FI$_9~$^$l$?$i!"(B <CODE>d_add(dentry, inode)</CODE> $B$K$h$j(B dentry $B$N%$%s%9%?%s%9$,:n@.$5$l$^$9!#(B
$B$3$3$GCm0U$9$k$N$O!">e5-$N4V$G!"%*%s%G%#%9%/(B inode $BHV9f$H$$$&%3%s%;%W%H$r;}$D(BUNIX $B%9%?%$%k$N%U%!%$%k%7%9%F%`$N$?$a$K!"$=$N%(%s%G%#%"%s$r8=:_$N(B CPU $B%U%)!<%^%C%H$K%^%C%W$9$k$N$,%k%C%/%"%C%W%a%=%C%I$N;E;v$@$H$$$&$3$H$G$9!#(B
$B$?$H$($P!"%U%!%$%k%7%9%F%`$KFCM-$J(B raw $B%G%#%l%/%H%j%(%s%H%j$N(B inode $BHV9f$,%j%H%k%(%s%G%#%"%s$N(B32$B%S%C%H%U%)!<%^%C%H$G$"$l$P!"(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
unsigned long ino = le32_to_cpu(de->inode);
inode = iget(sb, ino);
d_add(dentry, inode);
</PRE>
<HR>
</CODE></BLOCKQUOTE>

$B$H$$$&%3!<%I$r<B9T$7$^$9!#(B</P>
<P>$B$3$N$h$&$K!"%U%!%$%k$r3+$/$H$-$K$O!"<BBN$,(B<CODE>iget4(sb, ino, NULL, NULL)</CODE> $B$G$"$k(B <CODE>iget(sb, ino)</CODE> $B$r$?$?$-$^$9!#$3$l$O!"(B</P>
<P>
<OL>
<LI> <CODE>inode_lock</CODE>$B$NJ]8n$N$b$H!"%O%C%7%e%F!<%V%k$NCf$+$i!"%9!<%Q%V%m%C%/$H(B inode $BHV9f$,0lCW$9$k(B inode $B$r8+$D$1$h$&$H$9$k!#$b$7!"(Binode $B$,8+$D$+$l$P!"$=$N;2>H%+%&%s%?(B (<CODE>i_count</CODE>) $B$rA}J,$9$k!#(B
$B$b$7!"A}2C$NA0$NCM$,(B 0 $B$G$"$C$?$i$P!"(Binode $B$O(B dirty $B$G$O$J$$$N$G!"$I$N%?%$%W$N%j%9%H(B(<CODE>iode->i_list</CODE>)$B$+$i$G$"$l:o=|$9$k!#$3$l$O!"8=:_(B on ($B$=$l$O$b$A$m$s(B<CODE>inode_unused</CODE>$B%j%9%H$G$J$1$l$P$J$i$J$$(B)$B$G$"$j!"(B<CODE>inode_in_use</CODE>$B%?%$%W$N%j%9%H$KA^F~$5$l$k!#:G8e$K!"(B<CODE>inodes_stat.nr_unused</CODE> $B$,8:>/$5$l$k!#(B
</LI>
<LI> $B$b$7(Binode$B$,8=:_%m%C%/$5$l$F$$$?$i!"%m%C%/$,2r=|$5$l$k$^$GBT$D!#$D$^$j!"(B<CODE>iget4()</CODE>$B$O%m%C%/$5$l$F$$$J$$(B inode $B$rJV$9$3$H$,J]>Z$5$l$k!#(B
</LI>
<LI> $B$b$7(B inode $B$,%O%C%7%e%F!<%V%k$K8+$D$+$i$J$1$l$P!"$3$N(B inode $B$K=i$a$F=P2q$C$?$H$$$&$3$H$K$J$k!#$h$C$F!"(B<CODE>get_new_inode()</CODE>$B$r8F$S=P$7!"%O%C%7%e%F!<%V%k$NA^F~$9$Y$-0LCV$r%]%$%s%?$GEO$9!#(B
</LI>
<LI> <CODE>get_new_inode()</CODE> $B$O?7$7$$(B inode $B$r(B<CODE>inode_cachep</CODE> SLAB $B%-%c%C%7%e$+$i3d$jEv$F$k!#$7$+$7!"$3$NA`:n$O(B(<CODE> GFP_KERNEL</CODE>$B3d$jEv$F$G(B)$B%V%m%C%/$G$-$k$?$a!"%O%C%7%e%F!<%V%k$r<i$k(B <CODE>inode_lock</CODE> spinlock $B$r%I%m%C%W$7$J$$$H$$$1$J$$!#(Bspinlock $B$r%I%m%C%W$7$F$7$^$C$?$?$a!"8e$G:F$S%O%C%7%e%F!<%V%k$G(B inode $B$r8!:w$7$F$_$J$/$F$O$J$i$J$$!#:FEY$=$l$,8+$D$+$l$P!"%O%C%7%e%F!<%V%k$G8+$D$1$?$b$N$rI|5"$7!"(B(<CODE>__iget</CODE> $B$K$h$C$F;2>H?t$rA}$d$7$?8e$K(B)$B!"?7$7$/3d$jEv$F$i$l$?(B inode $B$rGK4~$9$k!#%O%C%7%e%F!<%V%k$G$^$@8+$D$+$i$J$1$l$P!":#$5$C$-3d$jEv$F$??7$7$$(B inode $B$,!";H$o$l$k$Y$-$b$N$H$J$k!#$7$?$,$C$F!"$=$l$OMW5a$5$l$?CM$K=i4|2=$5$l$k!#$=$7$F!"%U%!%$%k%7%9%F%`$KFCM-$N(B <CODE>sb->s_op->read_inode()</CODE> $B%a%=%C%I$O!";D$j$N(B inode $B$r;H$&$?$a$K5/F0$5$l$k!#(B
$B$H$$$&$3$H$G!"(Binode $B%-%c%C%7%e%P%C%/$N%3!<%I$+$i!"%U%!%$%k%7%9%F%`%3!<%I$X8+$K9T$+$J$1$l$P$J$i$J$$!#(B
$B$3$3$G!"%U%!%$%k%7%9%F%`$KFCM-$N(B <CODE>lookup()</CODE> $B%a%=%C%I$,(B <CODE>iget()</CODE>$B$r5/F0$7$?$?$a$K!"(B inode $B%-%c%C%7%e$N%3!<%I$rFI$s$G$$$k$3$H$r;W$$=P$7$F$[$7$$!#(B <CODE>s_op->read_inode()</CODE> $B%a%=%C%I$,%G%#%9%/$h$j(Binode$B$rFI$_9~$`4V!"(Binode $B$O%m%C%/$5$l$k!#(B(<CODE>i_state = I_LOCK()</CODE>) <CODE>read_inode()</CODE> $B%a%=%C%I$,I|5"$7$?8e$K%m%C%/2r=|$5$l$k!#$=$7$F!"(Binode $B%m%C%/$rBT$C$F$$$kA4$F$,5/$3$5$l$k!#(B
</LI>
</OL>

$B$5$F!"$3$N%U%!%$%k%G%#%9%/%j%W%?$r(Bclose$B$7$?$H$-$K!"$J$K$,5/$3$k$+$r$_$F$$$-$^$9!#(B<B>close(2)</B> $B%7%9%F%`%3!<%k$O!"(B<CODE>do_close(fd, 1)</CODE> $B$r8F$S=P$9(B <CODE>fs/open.c:sys_close()</CODE> $B4X?t$H$7$F<BAu$5$l$F$$$^$9!#(B<CODE>do_close(fd, 1)</CODE> $B$O!"%W%m%;%9$N%U%!%$%k%G%#%9%/%j%W%?%F!<%V%k$N5-=R;R$rGm$.<h$j(B(NULL $B$GCV$-49$($k(B)$B!"$[$H$s$I$N:n6H$r9T$&(B <CODE>filp_close()</CODE> $B4X?t$r8F$S=P$7$^$9!#(B
<CODE>fput()</CODE>$B$G$O$*$b$7$m$$$3$H$,5/$3$j$^$9!#$3$l$,%U%!%$%k$N:G8e$N%j%U%!%l%s%9$G$"$k$J$i$P!"(B<CODE>__fput()</CODE>$B$r8F$S$@$9(B <CODE>fs/file_table.c:_fput()</CODE> $B$,8F$S=P$5$l!"(Bdcache $B$HAj8_:nMQ$r5/$3$7$^$9!#(B($B$7$+$b(B inode cache $B$H$b:nMQ$7$^$9(B -- dcache $B$O(B inode $B%-%c%C%7%e$N%^%9%?!<$G$"$C$?(B!)
<CODE>fs/dcache.c:dput()</CODE> $B$O!"(B $B2f!9$r(B <CODE>iput(inode)</CODE>$B$r7PM3$7$F(Binode $B%-%c%C%7%e$X0z$-La$7$F$/$l$k(B<CODE>dentry_iput()</CODE>$B$r<B9T$7$^$9!#(B
$B$7$?$,$C$F!"(B<CODE>fs/inode.c:iput(inode)</CODE>$B$O<!$N$h$&$KM}2r$9$k$3$H$,$G$-$^$9!#(B</P>
<P>
<OL>
<LI> $B$b$7EO$5$l$?%Q%i%a!<%?$,(B NULL $B$J$i$P!"K\Ev$K2?$b$;$:La$k!#(B</LI>
<LI> $B$b$7!"(Bfs$BFCM-$N(B <CODE>sb->s_op->put_inode()</CODE> $B%a%=%C%I$,$"$l$P!"(B($B%V%m%C%/$G$-$k$?$a(B)$B%9%T%s%m%C%/$r<hF@$9$k$3$H$J$/$9$0$K5/F0$5$l$k!#(B</LI>
<LI> <CODE>inode_lock</CODE>$B%9%T%s%m%C%/$,<hF@$5$l(B <CODE>i_count</CODE> $B$,#1$D8:>/$5$l$k!#(B
$B$b$7$3$l$,$3$N(B inode $B$X$N:G8e$N%j%U%!%l%s%9$G!v$J$1$l!v$P!"C1=c$K%j%U%!%l%s%9$,B?$9$.$J$$$+$I$&$+$r3NG'$9$k!#(B
$B$3$l$O!"(B<CODE>i_count</CODE> $B$,3d$jEv$F$i$l$?(B 32bit $B0JFb$KG<$a$k$?$a$G$"$k!#$b$7!"%j%U%!%l%s%9$,B?$9$.$k>l9g$O7Y9p$rI=<($7$FJV$k!#(B
$B$3$3$G!"(B<CODE>inode_lock</CODE> $B%9%T%s%m%C%/$r<hF@$7$F$$$k$H$-$K(B <CODE>printk()</CODE> $B$r8F$S=P$9$,!"$3$l$OBg>fIW$G$"$k!#$H$$$&$N$O!"(B<CODE>printk()</CODE>$B$O%V%m%C%/$5$l$k$3$H$O$J$/!"$7$?$,$C$F$$$D$$$+$J$k%3%s%F%-%9%H(B($B3d$j9~$_%O%s%I%i$G$5$((B)$B$+$i$G$b8F$S=P$9$3$H$,$G$-$k$?$a$@!#(B
</LI>
<LI> $B$b$7:G8e$N%"%/%F%#%V$J%j%U%!%l%s%9$G$"$C$?>l9g$K$O!"I,MW$J=hM}$,$"$k!#(B</LI>
</OL>
</P>
<P>$B:G8e$N(B inode $B%j%U%!%l%s%9$G$N(B <CODE>iput()</CODE> $B$,9T$&=hM}$O!"$d$dJ#;($J$b$N$G$9!#$=$N$?$a!"%j%9%H$G$b$=$N:G8e$KJ,$1$F$"$j$^$9!#(B</P>
<P>
<OL>
<LI> $B$b$7(B <CODE>i_nlink == 0</CODE> ($BNc(B: $B%U%!%$%k$,%*!<%W%s$7$F$$$k$H$-$K(B unlink $B$5$l$?(B)$B>l9g$O!"(B
inode $B$O%O%C%7%e%F!<%V%k$H(Btype list $B$+$i:o=|$5$l$k!#$b$7!"$3$N(B inode $B$N%Z!<%8%-%c%C%7%e$K$J$K$+%G!<%?%Z!<%8$,J];}$5$l$F$$$?$i!"(B<CODE>truncate_all_inode_pages(&amp;inode->i_data)</CODE> $B$K$h$j:o=|$5$l$k!#(B
$B$=$7$F!"%U%!%$%k%7%9%F%`FCM-$N(B <CODE>s_op->delete_inode()</CODE>$B%a%=%C%I$,8F$S=P$5$l$k!#(B
$B$3$l$ODL>o$O!"%G%#%9%/>e$N(B inode $B$r:o=|$9$k!#$b$7!"(B<CODE>s_op->delete_inode()</CODE>$B%a%=%C%I$,%U%!%$%k%7%9%F%`$K$h$jEPO?$5$l$F$$$J$$(B($BNc(B: ramfs)$B>l9g$K$O!"(B<CODE>clear_inode(inode)</CODE>$B$r8F$S=P$7!"$3$l$O$b$7EPO?$5$l$F$$$l$P(B<CODE>s_op->clear_inode()</CODE>$B$r8F$S=P$9!#$^$?!"(Binode $B$,FCDj$N%V%m%C%/%G%P%$%9$K4XO"$7$F$$$l$P!"%G%P%$%9$N%j%U%!%l%s%9%+%&%s%H$r(B<CODE>bdput(inode->i_bdev)</CODE>$B$GMn$H$9!#(B
</LI>
<LI> $B$b$7(B <CODE>i_nlink != 0</CODE> $B$J$i!"F1$8%O%C%7%e%P%1%C%H$NB>$N(B inode $B$,$"$k$+%A%'%C%/$9$k!#$=$7$F!"$J$1$l$P(B inode $B$O(B dirty $B$G$O$J$$$?$a!"$=$N(B type list $B$+$i:o=|$G$-$k!#(B $B$=$7$F!"(B<CODE>inode_unused</CODE>$B%j%9%H$XDI2C$7!"(B<CODE>inodes_stat.nr_unused</CODE>$B$rA}J,$9$k!#(B
$B$b$7!"$3$l$,F?L>(B inode $B$G$"$C$?(B(NetApp .snapshot)$B$J$i!"%?%$%W%j%9%H$+$i:o=|$7!"40A4$K%/%j%"(B/$BGK2u$9$k!#(B</LI>
</OL>
</P>


<H2><A NAME="ss3.2">3.2</A> <A HREF="Linux-Kernel-Internals.html#toc3.2">$B%U%!%$%k%7%9%F%`EPO?(B/$BEPO?2r=|(B</A>
</H2>


<P>Linux$B%+!<%M%k$O!"?7$7$$%U%!%$%k%7%9%F%`$r:G>.8B$NEXNO$G=q$/$3$H$,$G$-$k5!9=$rDs6!$7$F$$$^$9!#$=$NNr;KE*$JM}M3$H$O<!$N$h$&$J$b$N$G$9!#(B</P>
<P>
<OL>
<LI> $B?M!9$,(BLinux$B0J30$N%*%Z%l!<%F%#%s%0%7%9%F%`$r;H$C$F$$$k@$3&$G!"8E$$%=%U%H%&%(%"$X$NEj;q$rJ]8n$9$k$?$a$K!"(BLinux$B$OBgJQB?$/$N0[$J$C$?%U%!%$%k%U%!%$%k%7%9%F%`$N%5%]!<%H$K$h$jAj8_1?MQ@-$rDs6!$7$J$1$l$P$J$i$J$+$C$?!#$=$N$?$a!"B?$/$N%U%!%$%k%7%9%F%`$O$=$l<+?H$NB8:_$O$=$l$[$I=EMW$G$O$J$$$,!"8=B8$9$k(BLinux$B0J30$N%*%Z%l!<%F%#%s%0%7%9%F%`$,$H$N8_49@-$r$H$k$?$a$@$1$NL\E*$GB8:_$9$k!#(B
</LI>
<LI> $B%U%!%$%k%7%9%F%`$r5-=R$9$k%$%s%?!<%U%'!<%9$O$H$F$b%7%s%W%k$J$b$N$G$J$1$l$P$J$i$J$+$C$?!#(B
$B8=B8$9$k%W%m%W%i%(%?%j$J%U%!%$%k%7%9%F%`$r!"FI9~$_$N$_2DG=$J%U%!%$%k%7%9%F%`$r=q$/$3$H$K$h$C$F%j%P!<%9%(%s%8%K%"%j%s%0$G$-$k$h$&$K$9$k$?$a$K!"%U%!%$%k%7%9%F%`$r5-=R$9$k%$%s%?!<%U%'!<%9$O$H$F$b%7%s%W%k$J$b$N$G$J$1$l$P$J$i$J$+$C$?!#(B
$B$7$?$,$C$F!"(BLinux$B$N(BVFS$B$OFI9~$_@lMQ%U%!%$%k%7%9%F%`$N<BAu$,Hs>o$KMF0W$K$J$C$F$$$k!#%U%!%$%k%7%9%F%`$N%5%]!<%H$r=q$/;E;v$N$N(B95%$B$O!"=q$-9~$_$N%U%k%5%]!<%H$rDI2C$7$F40@.$5$;$k$3$H$KHq$d$5$l$k$N$G$"$k!#6qBNE*$JNc$H$7$F$O!";d$,(BLinux$BMQ$KFI9~$_@lMQ$N(BBFS$B%U%!%$%k%7%9%F%`$r=q$/$N$KLs#1#0;~4V$G$G$-$?$N$KBP$7$F!"40A4$J=q$-9~$_%5%]!<%H$rDI2C$7$F40@.$5$;$k$N$K?t=54V$rMW$7$?$3$H$r5s$2$i$l$k(B($B$7$+$b!"8=:_$G$b(B
$B40`z<g5A<T$+$i!"(B"$B$3$l$O(Bcompactification$B%5%]!<%H$r;}$?$J$$$?$a(B"$B40@.$7$F$$$J$$$H<gD%$5$l$k$N$@(B)$B!#(B
</LI>
<LI> VFS $B%$%s%?!<%U%'!<%9$O%(%-%9%]!<%H$5$l$F$*$j!"$7$?$,$C$F$9$Y$F$N(BLinux$B%U%!%$%k%7%9%F%`$O%b%8%e!<%k$H$7$F<BAu$G$-$k!#(B
</LI>
</OL>
</P>
<P>$B$3$3$G!"(BLinux$B$G%U%!%$%k%7%9%F%`$N<BAu$KI,MW$J%9%F%C%W$r9M$($F$_$^$7$g$&!#%U%!%$%k%7%9%F%`$r<BAu$9$k%3!<%I$O!"F0E*$K%m!<%I$5$l$k%b%8%e!<%k$G$b!"@EE*$K%+!<%M%k$K%j%s%/$5$l$k$h$&$K$b9=@.$9$k$3$H$,$G$-$^$9!#(B
$B$=$7$F!"(B Linux$B$N85$G9T$o$l$kJ}K!$OHs>o$KL@Gr$G$9!#I,MW$J$3$H$O!"(B<CODE>struct file_system_type</CODE>$B9=B$BN$K>pJs$rKd$a$F!"$3$l$r(BVFS$B$X(B<CODE>register_filesystem()</CODE>$B4X?t$K$h$C$FEPO?$9$k$3$H$@$1$J$N$G$9!#(B<CODE>fs/bfs/inode.c</CODE>$B$NNc$@$H!"0J2<$N$h$&$K$J$j$^$9!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
#include &lt;linux/module.h>
#include &lt;linux/init.h>

static struct super_block *bfs_read_super(struct super_block *, void *, int);

static DECLARE_FSTYPE_DEV(bfs_fs_type, "bfs", bfs_read_super);

static int __init init_bfs_fs(void)
{
        return register_filesystem(&amp;bfs_fs_type);
}

static void __exit exit_bfs_fs(void)
{
        unregister_filesystem(&amp;bfs_fs_type);
}

module_init(init_bfs_fs)
module_exit(exit_bfs_fs)
</PRE>
<HR>
</CODE></BLOCKQUOTE>
</P>
<P><CODE>module_init()/module_exit()</CODE>$B%^%/%m$O!"(BBFS$B$,%b%8%e!<%k$H$7$F%3%s%Q%$%k$5$l$?$H$-$K!"4X?t(B<CODE>init_bfs_fs()</CODE>$B$H(B<CODE>exit_bfs_fs()</CODE>$B$,$=$l$>$l!"(B<CODE>init_module()</CODE>$B$H(B<CODE>cleanup_module()</CODE>$B$K$J$k$h$&$K$7$^$9!#(B</P>
<P><CODE>struct file_system_type</CODE>$B$O!"(B<CODE>include/linux/fs.h</CODE>$B$GDj5A$5$l$^$9!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
struct file_system_type {
        const char *name;
        int fs_flags;
        struct super_block *(*read_super) (struct super_block *, void *, int);
        struct module *owner;
        struct vfsmount *kern_mnt; /* For kernel mount, if it's FS_SINGLE fs */
        struct file_system_type * next;
};
</PRE>
<HR>
</CODE></BLOCKQUOTE>
</P>
<P>$B$=$l$>$l$N%a%s%P$O!"<!$N$h$&$K@bL@$5$l$^$9!#(B</P>
<P>
<UL>
<LI> <B>name</B>: $B?M$,FI$a$kL>A0$G!"(B<CODE>filesystemsproc</CODE>$B%U%!%$%k$X8=$o$l$^$9!#$=$7$F!"%U%!%$%k%7%9%F%`$rL>A0$+$i8+$D$1$k$H$-$N%-!<$H$7$F;H$o$l$^$9!#$3$l$HF1$8L>A0$O!"(B<B>mount(2)</B>$B$X;XDj$9$k%U%!%$%k%7%9%F%`$N%?%$%W$H$7$F$b;H$o$l!"%U%!%$%k%7%9%F%`$4$H$K0l0U$G$J$1$l$P$J$j$^$;$s!#(B
</LI>
<LI> <B>fs_flags</B>: $B#1$D$J$$$7$O(B(OR$B$5$l$?(B)$BJ#?t$N%U%i%0(B: <CODE>FS_REQUIRES_DEV</CODE>$B$O!"%V%m%C%/%G%P%$%9>e$K$@$1%^%&%s%H2DG=$J%U%!%$%k%7%9%F%`$H$$$&0UL#!#(B<CODE>FS_SINGLE</CODE>$B$O!"M##1$D$N%9!<%Q!<%V%m%C%/$r$b$D%U%!%$%k%7%9%F%`!"(B<CODE>FS_NOMOUNT</CODE>$B$O%f!<%6%9%Z!<%9$+$i%^%&%s%H$G$-$J$$!"$D$^$j(B<B>mount(2)</B>$B%7%9%F%`%3!<%k$G%^%&%s%H$G$-$J$$%U%!%$%k%7%9%F%`!#$7$+$7$3$l$O!"FbItE*$K$O(B<CODE>kern_mount()</CODE>$B%$%s%?!<%U%'!<%9$r;H$($P%^%&%s%H$G$-$k(B ($BNc(B pipefs)$B!#(B
</LI>
<LI><B>read_super</B>: $B%^%&%s%HA`:nCf$K%9!<%Q%V%m%C%/$rFI9~$`4X?t$X$N%]%$%s%?!#$3$N4X?t$OI,?\$G$"$k!#$3$N%]%$%s%?$,EO$5$l$J$+$C$?$J$i!"%^%&%s%HA`:n(B($B%f!<%66u4V$K$;$h%+!<%M%k$+$i$K$;$h(B)$B$,(B<CODE>FS_SINGLE</CODE>$B$N>l9g$r=|$$$F>o$K<:GT$7!"(B
<CODE>fs_type->kern_mnt->mnt_sb</CODE>$B$r(B(<CODE>fs_type->kern_mnt = NULL</CODE>)$B$N$h$&$K;2>H$7$h$&$H$7$F!"(B<CODE>get_sb_sinle()</CODE>$B$G(BOops $B%(%i!<$,H/@8$9$k!#(B
</LI>
<LI><B>owner</B>: $B$3$N%U%!%$%k%7%9%F%`$r<BAu$7$F$$$k%b%8%e!<%k$X$N%]%$%s%?!#$b$7%U%!%$%k%7%9%F%`$,%+!<%M%k$K@EE*$K%j%s%/$5$l$F$$$l$P!"$3$NCM$O(BNULL$B$H$J$k!#$3$l$r<jF0$G@_Dj$9$kI,MW$O$J$/!"%^%/%m(B <CODE>THIS_MODULE</CODE> $B$K$h$C$F<+F0$GE,@Z$K@_Dj$5$l$k!#(B
</LI>
<LI><B>kern_mnt</B>: <CODE>FS_SINGLE</CODE>$B%U%!%$%k%7%9%F%`$N$_MxMQ!#$3$l$O(B<CODE>kern_mount()</CODE>$B$,@_Dj$9$k!#(B(TODO: <CODE>kern_mount()</CODE>$B$O(B<CODE>FS_SINGLE</CODE>$B$,@_Dj$5$l$F$$$J$$%U%!%$%k%7%9%F%`$N%^%&%s%H$r5qH]$9$Y$-$G$"$k(B)$B!#(B
</LI>
<LI> <B>next</B>: <CODE>file_systems$B$K$h$k(B</CODE>$BJRJ}8~%j%9%H$N@hF,$X$N%j%s%/(B (<CODE>fs/super.c</CODE>$B$r;2>H(B)$B!#%j%9%H$O!"(B<CODE>file_systems_lock</CODE>$BFI$_=q$-%9%T%s%m%C%/$K$h$jJ]8n$5$l$F$*$j!"(B<CODE>register/unregister_filesystem()</CODE>$B4X?t$O!"%j%9%H$+$i%(%s%H%j$r<h$j30$7$?$j!"F~$l$?$j$9$k$3$H$GJQ99$r9T$&!#(B</LI>
</UL>
</P>
<P><CODE>read_super()</CODE>$B4X?t$N;E;v$O!"%9!<%Q!<%V%m%C%/$N%U%#!<%k%I$rKd$a$k$3$H$G$9!#(B
inode$B$N>l=j$r3d$jEv$F!"%^%&%s%H$5$l$?%U%!%$%k%7%9%F%`$N%$%s%9%?%s%9$K4XO"$E$1$i$l$?(Bfs$B8GM-$N>pJs$r=i4|2=$7$^$9!#(B</P>
<P>
<OL>
<LI> $B%P%C%U%!%-%c%C%7%e(B<CODE>bread()</CODE>$B4X?t$r;H$C$F!"%9!<%Q!<%V%m%C%/$r(B<CODE>sb->s_dev</CODE>$B9`$G;X<($5$l$k%G%P%$%9$+$iFI$_<h$k!#(B</LI>
<LI> $B%9!<%Q%V%m%C%/$,@5$7$$%^%8%C%/%J%s%P!<$+$i$J$C$F$$$k$+3NG'$7!"A4BNE*$K@5>o$G$"$k$+$r!V8+!W$k!#(B
</LI>
<LI> <CODE>sb->s_op</CODE>$B$r(B<CODE>struct super_block_operations</CODE>$B9=B$BN$r;X$9$h$&$K=i4|2=$9$k!#$3$N9=B$BN$O!"!V(Binode$B$rFI$_<h$k!W$H$+!"!V(Binode$B$r:o=|$9$k!W$J$I$N$h$&$JA`:n$r<BAu$7$F$$$k%U%!%$%k%7%9%F%`FCM-$N4X?t$+$i$J$k!#(B
</LI>
<LI> <CODE>d_alloc_root()</CODE>$B$rMQ$$$F%k!<%H(Binode$B$H%k!<%H(Bdentry$B$r3d$jEv$F$k!#(B
</LI>
<LI> $B$b$7%U%!%$%k%7%9%F%`$,FI$_<h$j@lMQ$G%^%&%s%H$5$l$F$$$J$1$l$P!"(B<CODE>sb->s_dirt</CODE>$B$r(B1$B$K@_Dj$7!"%9!<%Q!<%V%m%C%/$+$i$J$k%P%C%U%!$r(Bdirty$B$H%^!<%/$9$k(B(TODO: $B$J$<$3$l$,I,MW(B?BFS$B$G$O!"(BMINIX$B$,$=$&$7$F$$$?$N$G$d$C$F$$$k$,(B...)</LI>
</OL>
</P>

<H2><A NAME="ss3.3">3.3</A> <A HREF="Linux-Kernel-Internals.html#toc3.3">$B%U%!%$%k%G%9%/%j%W%?4IM}(B</A>
</H2>


<P>Linux$B$K$*$$$F$O!"%f!<%6%U%!%$%k%G%9%/%j%W%?$H%+!<%M%k$N(Binode$B9=B$BN$N4V$K4V@\E*$J%l%Y%k$,B8:_$7$F$$$^$9!#%W%m%;%9$,(B<CODE>open(2)</CODE>$B%7%9%F%`%3!<%k8F$S=P$9$H$-!"%+!<%M%k$O!"$3$N%U%!%$%k$r<!$N(BI/O$BA`:n$G;HMQ$9$k>.$5$$@5$N@0?t$rJV$7$^$9!#$3$N@0?t$O!"(B<CODE>struct file</CODE>$B$X$N%]%$%s%?$NG[Ns$N%$%s%G%C%/%9$K$J$C$F$$$^$9!#3F%U%!%$%k9=B$BN$O!"(B<CODE>file->f_dentry</CODE>$B$rDL$7$F!"(Bdentry$B$r;X$7$F$$$^$9!#$=$7$F3F(Bdentry$B$O(B<CODE>dentry->d_inode</CODE>$B$rDL$8$F(Binode$B$r;X$7$F$$$^$9!#(B</P>
<P>$B3F%?%9%/$O!"(B<CODE>include/linux/sched.h</CODE>$B$GDj5A$5$l$F$$$k(B<CODE>struct files_struct</CODE>$B$r;X$7$F$$$k(B<CODE>tsk->files</CODE>$B%U%#!<%k%I$r;}$C$F$$$^$9!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
/*
 * Open file table structure
 */
struct files_struct {
        atomic_t count;
        rwlock_t file_lock;
        int max_fds;
        int max_fdset;
        int next_fd;
        struct file ** fd;      /* current fd array */
        fd_set *close_on_exec;
        fd_set *open_fds;
        fd_set close_on_exec_init;
        fd_set open_fds_init;
        struct file * fd_array[NR_OPEN_DEFAULT];
};
</PRE>
<HR>
</CODE></BLOCKQUOTE>
</P>
<P><CODE>file->count</CODE>$B$O;2>H%+%&%s%?$G$"$j!"(B($BDL>o!"(B<CODE>fget()</CODE>$B$+$i8F$S=P$5$l$k(B)<CODE>get_file()</CODE>$B$GA}J,$5$l!"(B<CODE>fput()</CODE>$B$H(B<CODE>put_filp()</CODE>$B$G8:>/$5$l$^$9!#(B<CODE>fput()</CODE>$B$H(B<CODE>put_filp()</CODE>$B$N0c$$$O!"(B<CODE>fput()</CODE>$B$,0lHL$N%U%!%$%k$KDL>oI,MW$J!"%U%!%$%k%m%C%/$N3+J|$d(Bdentry$B$N3+J|$J$I$NDI2C$N=hM}$r9T$&$N$KBP$7!"(B<CODE>put_filp()</CODE>$B$OC1$K%U%!%$%k%F!<%V%k9=B$BN$rA`:n$9$k$K2a$.$J$$$H$3$m$K$"$j$^$9!#$D$^$j!"%+%&%s%?$N8:>/$O(B<CODE>file_lock</CODE>$B%9%T%s%m%C%/$NJ]8n$N$b$H!"(B<CODE>anon_list</CODE>$B$+$i%U%!%$%k$r:o=|$7!"$=$l$r(B<CODE>free_list</CODE>$B$XDI2C$9$k$H$$$&$3$H$G$9!#(B</P>

<P>$B$b$7;R$N%9%l%C%I$,%/%m!<%s%U%i%00z?t$K(B<CODE>CLONE_FILES</CODE>$B$r@_Dj$7$F(B<CODE>clone()</CODE>$B%7%9%F%`%3!<%k$r8F$s$G:n$i$l$?$b$N$G$"$l$P!"(B<CODE>tsk->files</CODE>$B$O?F$H;R$N4V$G6&M-$9$k$3$H$,$G$-$^$9!#$3$l$O!"(B(<CODE>do_fork()</CODE>$B$K$h$C$F8F$P$l$k(B)<CODE>kernel/fork.c:copy_files()</CODE>$B$K$*$$$F8+$k$3$H$,$G$-!"$3$l$O!"$b$7(B<CODE>CLONE_FILES</CODE>$B$,!"EAE}E*$J=>Mh$N8EE5E*(BUNIX$B$N(B<B>fork(2)</B>$B$K$*$1$kDL>o$N%U%!%$%k%G%9%/%j%W%?%F!<%V%k$N%3%T!<$N$+$o$j$K@_Dj$5$l$F$$$l$P!"C1$K(B<CODE>file->count</CODE>$B$rA}J,$5$;$k$@$1$G$9!#(B</P>
<P>$B%U%!%$%k$,3+$+$l$k$H$-!"$=$l$K3d$jEv$F$i$l$k%U%!%$%k9=B$BN$O!"(B<CODE>current->files->fd[fd]</CODE>$B%9%m%C%H$XAH$_9~$^$l$^$9!#$=$7$F%S%C%H%^%C%W(B<CODE>current->files->open_fds</CODE>$B$N(B<CODE>fd</CODE>$B%S%C%H$,%;%C%H$5$l$^$9!#$3$l$i$N$3$H$OA4$F!"(B<CODE>current->files->file_lock</CODE>$BFI$_=q$-%9%T%s%m%C%/$N=q$-9~$_J]8n$N$b$H$G9T$o$l$^$9!#$b$7!"%G%9%/%j%W%?$,(Bclose$B$5$l$l$P!"(B <CODE>current->files->open_fds</CODE>$B$N(B<CODE>fd</CODE>$B%S%C%H$O%/%j%"$5$l!"$3$N%W%m%;%9$,%U%!%$%k$r$D$.$K%*!<%W%s;HMQ$H$7$?$H$-$K!":G=i$NL$;HMQ$N%G%9%/%j%W%?$r8+$D$1$k$?$a$N%R%s%H$H$7$F!"(B<CODE>current->files->next_fd</CODE>$B$O(B<CODE>fd</CODE>$B$HF1$8$K$J$k$h$&@_Dj$5$l$^$9!#(B</P>

<H2><A NAME="ss3.4">3.4</A> <A HREF="Linux-Kernel-Internals.html#toc3.4">$B%U%!%$%k9=B$BN4IM}(B</A>
</H2>


<P>$B%U%!%$%k9=B$BN$O(B <CODE>include/linux/fs.h</CODE>$B$GDj5A$5$l$F$$$^$9!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
struct fown_struct {
        int pid;                /* pid or -pgrp where SIGIO should be sent */
        uid_t uid, euid;        /* uid/euid of process setting the owner */
        int signum;             /* posix.1b rt signal to be delivered on IO */
};

struct file {
        struct list_head        f_list;
        struct dentry           *f_dentry;
        struct vfsmount         *f_vfsmnt;
        struct file_operations  *f_op;
        atomic_t                f_count;
        unsigned int            f_flags;
        mode_t                  f_mode;
        loff_t                  f_pos;
        unsigned long           f_reada, f_ramax, f_raend, f_ralen, f_rawin;
        struct fown_struct      f_owner;
        unsigned int            f_uid, f_gid;
        int                     f_error;

        unsigned long           f_version;
  
        /* needed for tty driver, and maybe others */
        void                    *private_data; 
};
</PRE>
<HR>
</CODE></BLOCKQUOTE>
</P>
<P>$B$G$O(B <CODE>struct file</CODE> $B$N%a%s%P$r8+$F$$$-$^$7$g$&!#(B</P>
<P>
<OL>
<LI> <B>f_list</B>: $B$3$N%a%s%P$O<!$N%j%9%H$N$&$A0l$D(B($B$=$7$F$?$@$R$H$D(B)$B$N%U%!%$%k9=B$BN$r%j%s%/$9$k!#(Ba) $B$3$N%U%!%$%k%7%9%F%`$NA4$F$N%*!<%W%s$7$F$$$k%U%!%$%k$N(B<CODE>sb->s_files</CODE>$B%j%9%H!"$b$74XO"$9$k(Binode$B$,F?L>$G$J$1$l$P!"(B(<CODE>filp_open()</CODE>$B$+$i$h$P$l$k(B)<CODE>dentry_open()</CODE>$B$O!"$3$N%j%9%H$K%U%!%$%k$r%j%s%/$9$k!#(Bb) <CODE>fs/file_table.c:free_list</CODE>, $BL$;HMQ$N%U%!%$%k9=B$BN$+$i$J$k!#(Bc) <CODE>fs/file_table.c:anon_list</CODE>, <CODE>get_empty_filp()</CODE>$B$K$h$C$F?7$7$$%U%!%$%k9=B$BN$,:n$i$l$?$H$-$K$3$N%j%9%H$K$*$+$l$k!#$9$Y$F$N%j%9%H$O(B<CODE>files_lock</CODE>$B%9%T%s%m%C%/$K$h$C$FJ]8n$5$l$k!#(B
</LI>
<LI> <B>f_dentry</B>: $B$3$N%U%!%$%k$K4XO"$E$1$i$l$k(Bdentry$B!#(Bdentry$B$O!"(B<CODE>open_namei()</CODE>$B$,(Bnameidata$B$rC5$9$H$-(B($B$"$k$$$O!"$3$l$r8F$S=P$9(B<CODE>path_walk()</CODE>$B$,<B9T$5$l$?$H$-(B)$B$K:n$i$l$k!#$7$+$7!"<B:]$N(B<CODE>file->f_dentry</CODE>$B%a%s%P$O(B<CODE>dentry_open()</CODE>$B$K$h$C$F!"$3$N$h$&$K$7$F8+$D$+$C$?(Bdentry$B$K%;%C%H$5$l$k!#(B
</LI>
<LI> <B>f_vfsmnt</B>: $B$=$N%U%!%$%k$N(B<CODE>vfsmount</CODE>$B%U%!%$%k%7%9%F%`9=B$BN$r;X$9!#$3$l$O!"(B<CODE>dentry_open()</CODE>$B$K$h$C$F@_Dj$5$l$k$,!"(B<CODE>open_namei()</CODE>($B$J$$$7$O!"$3$l$r8F$S=P$9(B <CODE>path_init()</CODE>) $B$K$h$j(B nameidata $B$N0lIt$H$7$F8+$k$3$H$,$G$-$k!#(B
</LI>
<LI> <B>f_op</B>: $B$3$N%U%!%$%k$G5/F0$5$l$k$5$^$6$^$J%a%=%C%I$+$i$J$k(B<CODE>file_operations</CODE>$B$r;X$9!#$3$l$O!"(Bnameidata$B$N8!:wCf$K%U%!%$%k%7%9%F%`FCM-$N(B<CODE>s_op->read_inode()</CODE>$B%a%=%C%I$K$h$C$F:n$i$l$?!"(B<CODE>inode->i_fop</CODE>$B$+$i%3%T!<$5$l$k!#$3$N%;%/%7%g%s$N8e$NJ}$G!"(B<CODE>file_operations</CODE>$B%a%=%C%I$O>\:Y$K8+$F$$$/$3$H$K$7$h$&!#(B
</LI>
<LI><B>f_count</B>: <CODE>get_file/put_filp/fput</CODE>$B$K$h$jA`:n$5$l$k%j%U%!%l%s%9%+%&%s%?!#(B
</LI>
<LI><B>f_flags</B>: <CODE>dentry_open()</CODE>$B$K$h$C$F(B(<CODE>filp_open()</CODE>$B$,<c43$NJQ99$r2C$($F(B)$B%3%T!<$5$l$k(B<B>open(2)</B>$B%7%9%F%`%3!<%k$+$i$N(B<CODE>O_XXX</CODE>$B%U%i%0!#(B<CODE>O_CREAT</CODE>$B!"(B<CODE>O_EXCL</CODE>$B!"(B<CODE>O_NOCTTY</CODE>$B!"(B<CODE>O_TRUNC</CODE>$B$r%/%j%"$7$?8e$O$3$l$i$N%U%i%0$rD9$$4VJ]B8$7$F$*$/0UL#$O$J$$!#$J$<$J$i!"(B<CODE>F_SETFL</CODE> $B$d(B <CODE>F_GETFL</CODE> <B>fcntl(2)</B> $B%7%9%F%`%3!<%k$GJQ99$5$l$k$3$H$b!"Ld$$9g$o$;$i$l$k$3$H$b$J$$$+$i$G$"$k!#(B
</LI>
<LI><B>f_mode</B>: $B%f!<%66u4V$N%U%i%0$H%b!<%I$NAH$_9g$o$;!#(B<CODE>dentry_open()</CODE>$B$K$h$C$F@_Dj$5$l$k!#JQ49$N%]%$%s%H$O!"FI$_=q$-$N%"%/%;%9$rJL$N%S%C%H$X3JG<$9$k$3$H$G!"(B<CODE>(f_mode &amp; FMODE_WRITE)</CODE>$B$d(B<CODE>(f_mode &amp; FMODE_READ)</CODE>$B$N$h$&$J%A%'%C%/$rMF0W$K$9$k$3$H$,$G$-$k!#(B
</LI>
<LI><B>f_pos</B>: $B<!2s$N%U%!%$%k$NFI$_=q$-$K$*$1$k8=:_$N%U%!%$%k0LCV!#(Bi386$B$G$O!"(B<CODE>long long</CODE>$B7?!"$D$^$j(B64$B%S%C%HCM$K$J$k!#(B
</LI>
<LI><B>f_reada, f_ramax, f_raend, f_ralen, frawin</B>: readahead$B$r%5%]!<%H$9$k!#(B -- $BJ#;($9$.$F?M4V$K$O5DO@$G$-$J$$(B ;)
</LI>
<LI><B>f_owner</B>: $BHsF14|(BI/O$BDLCN$r(B<CODE>SIGIO</CODE>$B5!9=$rDL$8$F<u$1<h$k%U%!%$%k(BI/O$B$N=jM-<T!#(B(<CODE>fs/fcntl.c:kill_fasync()</CODE>$B;2>H(B)
</LI>
<LI><B>f_uid, f_gid</B>: $B%U%!%$%k9=B$BN$,(B<CODE>get_empty_filp()</CODE>$B$K$h$C$F:n$i$l$?$H$-$K%U%!%$%k$r3+$$$?%W%m%;%9$N%f!<%6(BID$B$H%0%k!<%W(BID$B$K@_Dj$5$l$k!#%U%!%$%k$,%=%1%C%H$N$H$-$O!"(Bipv4$B%M%C%H%U%#%k%?$,;H$&!#(B
</LI>
<LI><B>f_error</B>: $B=q$-9~$_%(%i!<$rJV$9$?$a$K(BNFS$B%/%i%$%"%s%H$,MxMQ$9$k!#$3$l$O(B<CODE>fs/nfs/file.c</CODE>$B$G@_Dj$5$l!"(B<CODE>mm/filemap.c:generic_file_write()</CODE>$B$G%A%'%C%/$5$l$k!#(B
</LI>
<LI><B>f_version</B>: $B%-%c%C%7%e$r<h$j>C$9$?$a$N%P!<%8%g%s4IM}%a%+%K%:%`!#(B($B%0%m!<%P%kJQ?t$N(B<CODE>event</CODE>$B$r;H$C$F(B)<CODE>f_pos</CODE>$B$,JQ$C$?$H$-$K$$$D$bA}J,$5$l$k!#(B
</LI>
<LI><B>private_data</B>: $B%U%!%$%k%7%9%F%`$,;H$&$3$H$,$G$-$k(B($BNc$($P!"(Bcoda $B$O$3$3$K(B $B>ZL@=q$r3JG<$9$k(B) $BHs8x3+$N%U%!%$%kKh$N%G!<%?!#$J$$$7$O!"%G%P%$%9%I%i%$%P$,;H$&!#(B(devfs$B$K$"$k(B)$B%G%P%$%9%I%i%$%P$O!"$3$N%a%s%P$r!"(B<CODE>file->f_dentry->d_inode->i_rdev</CODE>$B$KId9f2=$5$l$k!"8EE5E*$J%^%$%J!<HV9f$N$+$o$j$K!"J#?t$N%$%s%9%?%s%94V$r6hJL$9$k$N$K;H$($k!#(B
  </LI>
</OL>
</P>
<P>$B$5$F!"%U%!%$%k$K$D$$$F5/F0$G$-$k%a%=%C%I$+$i$G$-$F$$$k(B <CODE>file_operations</CODE>$B9=B$BN$r8+$F$_$^$7$g$&!#(B<CODE>inode->i_fop</CODE>$B$+$i%3%T!<$5$l$k$3$H$d!"$=$l$,(B<CODE>s_op->read_inode()</CODE>$B%a%=%C%I$K$h$C$F@_Dj$5$l$k$3$H$J$I$r3P$($F$$$k$G$7$g$&$+!#$3$l$O!"(B<CODE>include/linux/fs.h</CODE>$B$GDj5A$5$l$F$$$^$9!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
struct file_operations {
        struct module *owner;
        loff_t (*llseek) (struct file *, loff_t, int);
        ssize_t (*read) (struct file *, char *, size_t, loff_t *);
        ssize_t (*write) (struct file *, const char *, size_t, loff_t *);
        int (*readdir) (struct file *, void *, filldir_t);
        unsigned int (*poll) (struct file *, struct poll_table_struct *);
        int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
        int (*mmap) (struct file *, struct vm_area_struct *);
        int (*open) (struct inode *, struct file *);
        int (*flush) (struct file *);
        int (*release) (struct inode *, struct file *);
        int (*fsync) (struct file *, struct dentry *, int datasync);
        int (*fasync) (int, struct file *, int);
        int (*lock) (struct file *, int, struct file_lock *);
        ssize_t (*readv) (struct file *, const struct iovec *, unsigned long, loff_t *);
        ssize_t (*writev) (struct file *, const struct iovec *, unsigned long, loff_t *);
};
</PRE>
<HR>
</CODE></BLOCKQUOTE>
</P>
<P>
<OL>
<LI><B>owner</B>: $BO@E@$H$J$C$F$$$k%5%V%7%9%F%`$r=jM-$7$F$$$k%b%8%e!<%k$r;X$9!#%I%i%$%P$N$_$,$3$l$r(B<CODE>THIS_MODULE</CODE>$B$K@_Dj$9$kI,MW$,$"$j!"%b%8%e!<%k$N%+%&%s%H$O!"%I%i%$%P$,(Bopen/release$B;~$K@)8f$9$kI,MW$,$"$k$N$KBP$7$F!"(Bmount/umount$B$N$H$-$K@)8f$5$l$k$?$a!"%U%!%$%k%7%9%F%`$O9,1?$J$3$H$KL5;k$G$-$k!#(B
</LI>
<LI><B>llseek</B>: <B>lseek(2)</B>$B%7%9%F%`%3!<%k$r<BAu$7$F$$$k!#DL>o!"$3$l$O>JN,$5$l!"(B<CODE>fs/read_wirte.c:default_llseek()</CODE>$B$,;H$o$l$k!#$3$l$O@5$7$$J}K!$G$"$k!#(B(TODO: default_llseek$B$r;H$&$?$a$K8=:_$3$l$K(BNULL$B$r@_Dj$7$J$1$l$P$J$i$J$/$J$C$F$$$k!#$3$N$H$-$O!"(B<CODE>llseek()</CODE>$B$G(B<CODE>if()</CODE>$B$rJ]B8$7$F$$$k(B)$B!#(B
</LI>
<LI><B>read</B>: <CODE>read(2)</CODE>$B%7%9%F%`%3!<%k$N<BAu!#$3$3$G$O!"%U%!%$%k%7%9%F%`$O!"(B<CODE>mm/flemap.c:generic_file_read()</CODE>$B$rDL>o$N%U%!%$%k$K!"(B<CODE>fs/read_write.c:generic_read_dir()</CODE>($BC1=c$K(B<CODE>-EISDIR</CODE>$B$rJV$9(B)$B$r%G%#%l%/%H%j$K;HMQ$G$-$k!#(B
</LI>
<LI><B>write</B>: <B>write(2)</B>$B%7%9%F%`%3!<%k$N<BAu!#$3$3$G$O!"%U%!%$%k%7%9%F%`$O!"(B<CODE>mm/filemap.c:generic_file_write()</CODE>$B$rDL>o$N%U%!%$%k$K;HMQ$G$-!"%G%#%l%/%H%j$OL5;k$G$-$k!#(B
</LI>
<LI><B>readdir</B>: $B%U%!%$%k%7%9%F%`$,;H$&!#DL>o$N%U%!%$%k$OL5;k$5$l!"%G%#%l%/%H%j$K$O(B<B>readdir(2)</B> $B$H(B <B>getdents(2)</B> $B%7%9%F%`%3!<%k$,<BAu$5$l$k!#(B
</LI>
<LI><B>poll</B>: <B>poll(2)</B> $B$H(B <B>select(2)</B> $B%7%9%F%`%3!<%k$,<BAu$5$l$k!#(B
</LI>
<LI><B>ioctl</B>: $B%I%i%$%P$d%U%!%$%k%7%9%F%`FCM-$N(B ioctl $B$r<BAu$7$F$$$k!#0lHL$N%U%!%$%k$KBP$9$k(B <CODE>FIBMAP</CODE>$B$d(B <CODE>FIGETBSZ</CODE>$B!"(B <CODE>FIONREAD</CODE> $B$N$h$&$J(Bioctl $B$O!"9b%l%Y%k$G<BAu$5$l$F$*$j(B<CODE>f_op->ioctl()</CODE> $B%a%=%C%I$rFI$`$3$H$,$J$$!#(B
</LI>
<LI><B>mmap</B>: <B>mmap(2)</B> $B%7%9%F%`%3!<%k$r<BAu$7$F$$$k!#%U%!%$%k%7%9%F%`$O(B <B>generic_file_mmap</B>$B$r0lHL$N%U%!%$%k$KBP$7$F$3$3$G;H$&$3$H$,$G$-!"%G%#%l%/%H%j$KBP$7$F$OL5;k$5$l$k!#(B
</LI>
<LI><B>open</B>: <B>open(2)</B> $B$7$?$H$-$K(B<CODE>dentry_open()</CODE> $B$,8F$V!#%U%!%$%k%7%9%F%`$OLGB?$K;H$o$J$$!#Nc$($P!"(Bcoda $B$O%*!<%W%s$7$?$H$-$K%U%!%$%k$r%m!<%+%k$K%-%c%C%7%e$7$h$&$H$9$k!#(B</LI>
<LI><B>flush</B>: $B%U%!%$%k$N3F(B<B>close(2)</B>$B$4$H$K8F$P$l$k!#I,$:$7$b:G8e$K8F$P$l$kI,MW$O$J$$!#(B($B0J2<$N(B<CODE>release()</CODE>$B%a%=%C%I;2>H(B) $B$3$l$r;H$&%U%!%$%k%7%9%F%`$H$$$&$N$O!"M#0l(BNFS$B$N%/%i%$%"%s%H$G!"A4$F$N(Bdirty$B%Z!<%8$r=q$-=P$9!#$3$3$G!"(B<B>close(2)</B>$B%7%9%F%`%3!<%k$+$i!"%f!<%66u4V$KAw$jJV$5$l$k%(%i!<$rJV$9$3$H$,$"$k!#(B
</LI>
<LI><B>release</B>: $B%U%!%$%k$N:G8e$N(B<B>close(2)</B>$B$G8F$P$l$k!#$D$^$j!"(B<CODE>file->f_count</CODE>$B$,(B0$B$G$"$k$H$-$@!#@0?t$rJV$9$HDj5A$5$l$F$$$k$K$b4X$o$i$:!"(BVFS$B$G$OJV$jCM$OL5;k$5$l$k!#(B(<CODE>fs/file_table.c:__fput()</CODE>$B$r;2>H(B)
</LI>
<LI><B>fsync</B>: <B>fsync(2)/fdatasync(2)</B>$B%7%9%F%`%3!<%k$KD>@\BP1~$9$k!#:G8e$N0z?t$G(Bfsync$B$K$J$k$+(Bfdatasync$B$K$J$k$+$r;XDj$9$k!#(BVFS $B$O$=$N:]$[$H$s$I2?$b;E;v$r$7$J$$$,!"%U%!%$%k%G%#%9%/%j%W%?$r(B file $B9=B$BN$KBP1~$5$;$k$3$H(B (<CODE>file = fget(fd)</CODE>)$B!"$*$h$S(B <CODE>inode->i_sem</CODE> $B%;%^%U%)$rA`:n$9$k$3$H$O9T$&!#(BExt2 $B%U%!%$%k%7%9%F%`$O:G8e$N0z?t$rL5;k$9$k$N$G!"(B<B>fsync(2)</B> $B$H(B <B>fdatasync(2)</B> $B$N%7%9%F%`%3!<%k$OA4$/F1$8F/$-$r$9$k!#(B
</LI>
<LI><B>fasync</B>: $B$3$N%a%=%C%I$O!"(B<CODE>file->f_flags &amp; FASYNC</CODE> $B$,??$G$"$k$H$-$K;H$o$l$k!#(B
</LI>
<LI><B>lock</B> : $B%U%!%$%k%7%9%F%`$K8GM-$J(BPOSIX$B$N(B<B>fcntl(2)</B>$B$N%U%!%$%kNN0h%m%C%/5!9=!#$3$3$G$NM#0l$N%P%0$O!"(Bfs $BHs0MB8(B(<CODE>posix_lock_file()</CODE>)$B$J$b$N$,8F$P$l$kA0$K8F$P$l$?$H$-!"$b$7@.8y$7$?$,DL>o$N(BPOSIX$B%m%C%/%3!<%I$,<:GT$7$?$i(B fs $B0MB8%l%Y%k$G$O!"%m%C%/2r=|$G$-$J$/$J$k$H$$$&$3$H$G$"$k!#(B
</LI>
<LI><B>readv</B>: <B>readv(2)</B>$B%7%9%F%`%3!<%k$N<BAu!#(B
</LI>
<LI><B>writev</B>: <B>writev(2)</B>$B%7%9%F%`%3!<%k$N<BAu!#(B</LI>
</OL>
</P>

<H2><A NAME="ss3.5">3.5</A> <A HREF="Linux-Kernel-Internals.html#toc3.5">$B%9!<%Q!<%V%m%C%/$H%^%&%s%H%]%$%s%H4IM}(B</A>
</H2>


<P>Linux $B$K$*$$$F$O!"%^%&%s%H$5$l$?%U%!%$%k%7%9%F%`$K$D$$$F$N>pJs$O(B2$B$D$KJ,$+$l$?9=B$BN(B <CODE>super_block</CODE>$B$H(B<CODE>vfsmount</CODE> $B$GJ];}$5$l$F$$$^$9!#$3$l$O(B Linux $B$OF1$8%U%!%$%k%7%9%F%`(B($B%V%m%C%/%G%P%$%9(B)$B$rJ#?t$N%^%&%s%H%]%$%s%H$X%^%&%s%H$9$k!"$D$^$jF1$8(B<CODE>super_block</CODE> $B$,J#?t$N(B<CODE>vfsmount</CODE>$B9=B$BN$X4XO"$E$1$i$l$k$H$$$&0UL#$G$9$,!"$3$l$,5v$5$l$F$$$k$3$H$,!"(B2$B$D$KJ,$+$l$F4IM}$5$l$kM}M3$K$J$C$F$$$^$9!#(B</P>
<P><CODE>include/linux/fs.h</CODE> $B$GDj5A$5$l$k(B <CODE>struct super_block</CODE> $B$r:G=i$K$_$F$$$-$^$9!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
struct super_block {
        struct list_head        s_list;         /* Keep this first */
        kdev_t                  s_dev;
        unsigned long           s_blocksize;
        unsigned char           s_blocksize_bits;
        unsigned char           s_lock;
        unsigned char           s_dirt;
        struct file_system_type *s_type;
        struct super_operations *s_op;
        struct dquot_operations *dq_op;
        unsigned long           s_flags;
        unsigned long           s_magic;
        struct dentry           *s_root;
        wait_queue_head_t       s_wait;

        struct list_head        s_dirty;        /* dirty inodes */
        struct list_head        s_files;

        struct block_device     *s_bdev;
        struct list_head        s_mounts;       /* vfsmount(s) of this one */
        struct quota_mount_options s_dquot;     /* Diskquota specific options */

       union {
                struct minix_sb_info    minix_sb;
                struct ext2_sb_info     ext2_sb;
                ..... all filesystems that need sb-private info ...
                void                    *generic_sbp;
        } u;
       /*
         * The next field is for VFS *only*. No filesystems have any business
         * even looking at it. You had been warned.
         */
        struct semaphore s_vfs_rename_sem;      /* Kludge */

        /* The next field is used by knfsd when converting a (inode number based)
         * file handle into a dentry. As it builds a path in the dcache tree from
         * the bottom up, there may for a time be a subpath of dentrys which is not
         * connected to the main tree.  This semaphore ensure that there is only ever
         * one such free path per filesystem.  Note that unconnected files (or other
         * non-directories) are allowed, but not unconnected diretories.
         */
        struct semaphore s_nfsd_free_path_sem;
};
</PRE>
<HR>
</CODE></BLOCKQUOTE>
</P>
<P><CODE>super_block</CODE> $B9=B$BN$K$OMM!9$J%a%s%P$,$"$j$^$9!#(B</P>
<P>
<OL>
<LI><B>s_list</B>: $BA4$F$N%"%/%F%#%V$J%9!<%Q!<%V%m%C%/$N%@%V%k%j%s%/%j%9%H!#$3$3$G!"!VA4$F$N%^%&%s%H$5$l$?%U%!%$%k%7%9%F%`!W$H8@$o$J$$$N$O!"(BLinux $B$G$O!"0l$D$N%9!<%Q%V%m%C%/$K4XO"$E$1$i$l$?%^%&%s%H$5$l$?%U%!%$%k%7%9%F%`$NJ#?t$N%$%s%9%?%s%9$r;}$F$k$?$a$G$"$k!#(B
</LI>
<LI><B>s_dev</B>: $B%^%&%s%H$5$l$k$N$K%V%m%C%/$rI,MW$H$9$k%U%!%$%k%7%9%F%`!"$D$^$j(B <CODE>FS_REQUIRES_DEV</CODE> $B$J%U%!%$%k%7%9%F%`$K$H$C$F$O!"$3$N%a%s%P$O$=$N%V%m%C%/%G%P%$%9$N(B <CODE>i_dev</CODE> $B$G$"$k!#$=$NB>$N(B ($BF?L>%U%!%$%k%7%9%F%`$H8F$P$l$k(B) $B%U%!%$%k%7%9%F%`$KBP$7$F$O!"$3$l$O(B <CODE>MKDEV(UNNAMED_MAJOR, i)</CODE> $B$GI=$5$l$k@0?t$G$"$k!#$?$@$7(B <CODE>i</CODE> $B$O!"(B<CODE>unnamed_dev_in_use</CODE> $B%S%C%HG[Ns$NCf$G:G=i$N(B OFF $B%S%C%H$r;X$9!"(B1 $B$+$i(B 255 $B$NHO0O$NCM$G$"$k!#(B<CODE>fs/super.c:get_unnamed_dev()/put_unnamed_dev()</CODE> $B$r;2>H$N$3$H!#F?L>%U%!%$%k%7%9%F%`$,(B <CODE>s_dev</CODE> $B%a%s%P$rMxMQ$9$Y$-$G$J$$$H$$$&$3$H$O!"$3$l$^$G2?EY$bDs0F$5$l$F$-$?!#(B
</LI>
<LI><B>s_blocksize, s_blocksize_bits</B>: $B%V%m%C%/%5%$%:$H(Blog2($B%V%m%C%/%5%$%:(B)$B!#(B
</LI>
<LI><B>s_lock</B>: $B%9!<%Q!<%V%m%C%/$,!"(B<CODE>lock_super()/unlock_super()</CODE> $B$K$h$C$F8=:_%m%C%/$5$l$F$$$k$+$I$&$+$r<($9!#(B
</LI>
<LI><B>s_dirt</B>: $B%9!<%Q!<%V%m%C%/$,JQ99$5$l$?$H$-$K@_Dj$5$l!"%G%#%9%/$X=q$-La$5$l$?$H$-$O$$$D$b%/%j%"$5$l$k!#(B
</LI>
<LI><B>s_type</B>: $B4XO"$9$k%U%!%$%k%7%9%F%`$N(B <CODE>struct file_system_type</CODE> $B$r;X$9!#(Bfs $BFCM-$N(B<CODE>read_super()</CODE>$B$,@.8y$7$?$H$-$K(B VFS <CODE>fs/super.c:read_super()</CODE> $B$,@_Dj$7!"<:GT$7$?$H$-(B NULL $B$K%j%;%C%H$9$k$?$a!"%U%!%$%k%7%9%F%`$N(B <CODE>read_super()</CODE> $B%a%=%C%I$O@_Dj$9$kI,MW$,$J$$!#(B
</LI>
<LI><B>s_op</B>: fs $BFCM-$N(Bread/write inode$B$J$I$N%a%=%C%I$+$i$J$k(B <CODE>super_operations</CODE> $B9=B$BN$X$N%]%$%s%?!#(B<CODE>s_op</CODE> $B$r@5$7$/=i4|2=$9$k$N$O!"%U%!%$%k%7%9%F%`$N(B <CODE>read_super()</CODE> $B%a%=%C%I$N;E;v$G$"$k!#(B
</LI>
<LI><B>dq_op</B>: $B%G%#%9%/%/%*%?A`:n!#(B
</LI>
<LI><B>s_flags</B>: $B%9!<%Q!<%V%m%C%/%U%i%0!#(B
</LI>
<LI><B>s_magic</B>: $B%U%!%$%k%7%9%F%`$N%^%8%C%/HV9f!#(Bminix$B%U%!%$%k%7%9%F%`$G$O!"$=$l<+?H$NJ#?t%P!<%8%g%s$r6hJL$9$k$?$a$K;H$o$l$k!#(B
</LI>
<LI><B>s_root</B>: $B%U%!%$%k%7%9%F%`$N%k!<%H$N(Bdentry$B!#%k!<%H$N(B inode $B$r%G%#%9%/$+$iFI$_!"(B<CODE>d_alloc_root()</CODE>$B$r8F$s$G(Bdentry$B$r3d$jEv$F$F<BBN2=$9$k$?$a$KEO$9$N$O!"(B<CODE>read_super()</CODE> $B$N;E;v$G$"$k!#(B
</LI>
<LI><B>s_wait</B>: $B%9!<%Q!<%V%m%C%/$,%m%C%/2r=|$5$l$k$N$rBT$D%W%m%;%9$NBT$A%-%e!<!#(B
</LI>
<LI><B>s_dirty</B>: $BA4$F$N(Bdirty $B$J(B inode $B$N%j%9%H!#$b$7(B inode $B$,1x$l$F(B(<CODE>inode->i_state &amp; I_DIRTY</CODE>)$B$$$l$P!"%9!<%Q!<%V%m%C%/FCM-$N(B<CODE>inode->i_list</CODE>$B7PM3$G%j%s%/$5$l$?(B dirty $B%j%9%H$K$*$+$l$k!#(B
</LI>
<LI><B>s_files</B>: $B$3$N%9!<%Q!<%V%m%C%/$G%*!<%W%s$7$F$$$k%U%!%$%kA4$F$N%j%9%H!#%U%!%$%k%7%9%F%`$r(B read-only $B$G:F%^%&%s%H$G$-$k$+$rH=CG$9$k$H$-$KM-MQ!#(B<CODE>sb->s_files</CODE> $B%j%9%H$r$_$F!"$b$7%U%!%$%k$,=q$-9~$_%*!<%W%s$5$l$F$$$k(B(<CODE>file->f_mode &amp; FMODE_WRITE</CODE>)$B$+!"(Bunlink$B$,J]N1$5$l$F$$$k(B(<CODE>inode->i_nlink == 0</CODE>)$B%U%!%$%k$,$"$l$P!":F%^%&%s%H$r5qH]$9$k(B<CODE>fs/file_table.c:fs_may_remount_ro()</CODE>$B$r;2>H$9$k$3$H!#(B 
</LI>
<LI><B>s_bdev</B>: <CODE>FS_REQUIRES_DEV</CODE> $B$N$?$a$K!"$3$l$O(B $B%U%!%$%k%7%9%F%`$,%^%&%s%H$5$l$F$$$k%G%P%$%9$rI=$9(B block_device $B9=B$BN$r;X$7$F$$$k!#(B
</LI>
<LI><B>s_mounts</B>: $BA4$F$N(B <CODE>vfsmount</CODE> $B9=B$BN$N%j%9%H!#%^%&%s%H$5$l$?$3$N%9!<%Q!<%V%m%C%/$N3F%$%s%9%?%s%9$N(B??? 
</LI>
<LI><B>s_dquot</B>: $B%G%#%9%/%/%*%?MQ!#(B</LI>
</OL>
</P>
<P>$B%9!<%Q!<%V%m%C%/$NA`:n$O!"(B<CODE>include/linux/fs.h</CODE> $B$GDj5A$5$l$F$$$k(B <CODE>super_operations</CODE> $B9=B$BN$K5-=R$5$l$F$$$k!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
struct super_operations {
        void (*read_inode) (struct inode *);
        void (*write_inode) (struct inode *, int);
        void (*put_inode) (struct inode *);
        void (*delete_inode) (struct inode *);
        void (*put_super) (struct super_block *);
        void (*write_super) (struct super_block *);
        int (*statfs) (struct super_block *, struct statfs *);
        int (*remount_fs) (struct super_block *, int *, char *);
        void (*clear_inode) (struct inode *);
        void (*umount_begin) (struct super_block *);
};
</PRE>
<HR>
</CODE></BLOCKQUOTE>
</P>
<P>
<OL>
<LI><B>read_inode</B>: inode$B$r%U%!%$%k%7%9%F%`$+$iFI$_9~$`!#(B<CODE>iget4()</CODE>($B$7$?$,$C$F!"(B<CODE>iget()</CODE>)$B$rDL$7$F!"(B<CODE>fs/inode.c:get_new_inode()</CODE> $B$+$i$N$_8F$P$l$k!#$b$7%U%!%$%k%7%9%F%`$,(B<CODE>iget()</CODE>$B$r;H$$$?$$$J$i$P!"(B<CODE>read_inode()</CODE>$B$O<BAu$5$l$J$$$H$$$1$J$$!#$=$&$G$J$1$l$P!"(B<CODE>get_new_inode()</CODE>$B$O%Q%K%C%/$K$J$k!#(B
inode$B$,FI$^$l$F$$$k4V$O%m%C%/$5$l$k(B(<CODE>inode->i_state = I_LOCK</CODE>)$B!#4X?t$+$iI|5"$9$k$H$-!"A4$F$N(B<CODE>inode->i_wait</CODE>$B$NBT$A$O5/$3$5$l$k!#%U%!%$%k%7%9%F%`$N(B<CODE>read_inode()</CODE>$B%a%=%C%I$N;E;v$O!"FI$_9~$^$l$k(B inode $B$+$i$J$k%G%#%9%/%V%m%C%/$r3d$jEv$F!"%P%C%U%!!<%-%c%C%7%e(B <CODE>bread()</CODE>$B4X?t$r;H$C$FFI$_9~$_!$(Binode $B9=B$BN$NMM!9$J%U%#!<%k%I$,=i4|2=$5$l$k!%(B
$BNc$($P(B<CODE>inode->i_op</CODE> $B$H(B<CODE>inode->i_fop</CODE> $B$G$O!"(BVFS$B%l%Y%k$,!"(Binode $B$d4XO"$9$k%U%!%$%k$G$J$s$NA`:n$,9T$o$l$k$+$rCN$C$F$$$k(B 
<CODE>read_inode()</CODE>$B$r<BAu$7$J$$%U%!%$%k%7%9%F%`$O!"(Bramfs$B$H(Bpipefs$B$G$"$k!#$?$H$($P!"(Bramfs$B$O!"I,MW$K$J$C$?$H$-$KA4$F$N(Binode $B$NA`:n$,8F$V!"<+?H$N(Binode$B@8@.4X?t(B<CODE>ramfs_get_inode()</CODE>$B$r;}$C$F$$$k!#(B
</LI>
<LI><B>write_inode</B>: inode $B$r%G%#%9%/$K=q$-La$9!#(B<CODE>read_inode()</CODE>$B$H;w$F!"%G%#%9%/$KF1MM$J%V%m%C%/$r3d$jEv$F!"(B<CODE>mark_buffer_dirty(bh)</CODE>$B$r8F$V$3$H$G!"%P%C%U%!%-%c%C%7%e$H:nMQ$9$k!#$3$N%a%=%C%I$O!"(Binode$B$,!"$=$l$>$l$d%U%!%$%k%7%9%F%`A4BN$NF14|$N0lIt$J$j$GF14|$5$l$kI,MW$,$"$k$H$-!"(Bdirty $B$J(B inode (<CODE>mark_inode_dirty()</CODE>$B$K$h$C$F(B dirty $B$H0u$r$D$1$i$l$F$$$k(B)$B$KBP$7$F8F$P$l$k!#(B
</LI>
<LI><B>put_inode</B>: $B%j%U%!%l%s%9%+%&%s%?$,8:>/$5$;$i$l$k$H$-$K$$$D$b8F$P$l$k!#(B
</LI>
<LI><B>delete_inode</B>: <CODE>inode->i_count</CODE>$B$H(B<CODE>inode->i_nlink</CODE>$B$,(B0$B$K$J$k$H$-$O>o$K8F$P$l$k!#%U%!%$%k%7%9%F%`$O!"%*%s%G%#%9%/$N(Binode$B$N%3%T!<$r:o=|$7!"(BVFS$B$G(B<CODE>clear_inode()</CODE>$B$r8F$S=P$7$F!"!V40A4$K:,@d$9$k!W!#(B

-->
</LI>
<LI><B>put_super</B>: <B>umount(2)</B>$B%7%9%F%`%3!<%k$N:G=*CJ3,$G8F$P$l!"%U%!%$%k%7%9%F%`$KBP$7$F!"$3$N%$%s%9%?%s%9$K$D$$$F%U%!%$%k%7%9%F%`$,J];}$7$F$$$k$$$+$J$kFbIt$N>pJs$r2rJ|$7$J$1$l$P$J$i$J$$$3$H$rDLCN$9$k!#E57?E*$K$O$3$l$O!"%9!<%Q!<%V%m%C%/$,$"$k%V%m%C%/$r(B<CODE>brelse()</CODE>$B$7!"%U%j!<%V%m%C%/$d(Binode$B$J$I$N$?$a$K3d$jEv$F$i$l$?%S%C%H%^%C%W$rA4$F(B<CODE>kfree()</CODE>$B$9$k!#(B
 </LI>
<LI><B>write_super</B>: $B%9!<%Q!<%V%m%C%/$r%G%#%9%/$K=q$-La$9I,MW$,$"$k$H$-$K8F$P$l$k!#$3$l$O!"%9!<%Q%V%m%C%/(B($BDL>o(B<CODE>sb-private</CODE>$BNN0h$K$"$k(B)$B$H(B<CODE>mark_buffer_dirty(bh)</CODE>$B$,$"$k%V%m%C%/$r8+$D$1$J$1$l$P$J$i$J$$!#$3$l$O$^$?!"(B<CODE>sb->s_dirt</CODE>$B%U%i%0$r%/%j%"$9$k!#(B
</LI>
<LI><B>statfs</B>: <B>fstatfs(2)/statfs(2)</B>$B%7%9%F%`%3!<%k$N<BAu!#0z?t$H$7$FEO$5$l$k(B<CODE>struct stats</CODE>$B$X$N%]%$%s%?$O!"%f!<%6%]%$%s%?$G$O$J$/%+!<%M%k%]%$%s%?$G$"$k$?$a!"%f!<%66u4V$X$N(BI/O$B$,ITI,MW$G$"$k$3$H$KCm0U$9$k$3$H!#$b$7<BAu$5$l$F$$$J$1$l$P!"(B<CODE>statfs(2)</CODE>$B$O(B<CODE>ENOSYS</CODE>$B$G<:GT$9$k!#(B
</LI>
<LI><B>remount_fs</B>: $B%U%!%$%k%7%9%F%`$r:F%^%&%s%H$9$k$H$-$K$OI,$:8F$P$l$k!#(B
</LI>
<LI><B>clear_inode</B>: VFS$B%l%Y%k(B<CODE>clear_inode()</CODE>$B$+$i8F$P$l$k!#%W%i%$%Y!<%H%G!<%?$r(Binode$B9=B$BN$X(B(<CODE>generic_ip</CODE>$B%a%s%P$r7PM3$7$F(B)$B3d$jEv$F$k%U%!%$%k%7%9%F%`$O!"$3$3$G2rJ|$5$l$J$1$l$P$J$i$J$$!#(B
</LI>
<LI><B>umount_begin</B>: $B$J$K$b%U%!%$%k%7%9%F%`$r%S%8!<$K$7$J$$$3$H$r3N$+$a$k$N$KA4NO$r?T$/$9$3$H$,$G$-$k$h$&$K!"$"$i$+$8$a%U%!%$%k%7%9%F%`$XDLCN$9$k$?$a!"(Bumount$B$r6/@)$9$k4V$K8F$P$l$k!#8=:_!"(BNFS$B$G$N$_;H$o$l$k!#$3$l$O!"0lHLE*$J(BVFS$B%l%Y%k$N6/@)(Bumount$B%5%]!<%H$H$N4X78$O$J$$!#(B</LI>
</OL>
</P>
<P>$B$=$l$G$O!"(Bon-disk (<CODE>FS_REQUIRES_DEV</CODE>)$B%U%!%$%k%7%9%F%`$r%^%&%s%H$9$k$H$-$K5/$k$3$H$r8+$F$$$-$^$7$g$&!#(B
<B>mount(2)</B>$B%7%9%F%`%3!<%k$N<BAu$O!"(B<CODE>fs/super.c:sys_mount()</CODE> $B$K$"$j!"$3$l$O<B:]$N=hM}$r9T$&(B <CODE>do_mount()</CODE> $B4X?t$K%*%W%7%g%s$H%U%!%$%k%7%9%F%`%?%$%W$d%G%P%$%9L>$r%3%T!<$9$kC1$J$k%i%C%Q!<$K$J$C$F$$$^$9!#(B</P>
<P>
<OL>
<LI>$B%U%!%$%k%7%9%F%`$N%I%i%$%P$OI,MW$K$J$C$?$H$-$K%m!<%I$5$l!"%b%8%e!<%k$N;2>H%+%&%s%H$,A}J,$5$l$k!#$3$3$G!"%^%&%s%H$N:GCf$K%U%!%$%k%7%9%F%`$N%b%8%e!<%k$K$D$$$F$N;2>H%+%&%s%H$K$D$$$F$O!"(B2$B$DA}J,$5$l$k$3$H$KCm0U$,I,MW$G$"$k!#(B<CODE>do_mount()</CODE>$B$,(B<CODE>get_fs_type()</CODE>$B$r8F$V$H$-$K(B1$B2s!"(B<CODE>read_super()</CODE>$B$,@.8y$7$?$J$i$P!"(B<CODE>get_sb_dev()</CODE>$B$,(B<CODE>get_filesystem()</CODE>$B$r8F$V$H$-$K(B1$B2s$G$"$k!#(B1$B$D$a$NA}J,$O!"(B<CODE>read_super()</CODE>$B$NFbIt$K$*$$$F!"%b%8%e!<%k$,%"%s%m!<%I$5$l$k$N$rHr$1$k$?$a$G$"$j!"(B2$B$D$a$NA}J,$O!"%^%&%s%H$5$l$?%$%s%9%?%s%9$K$h$C$F%b%8%e!<%k$,;HMQCf$G$"$k$3$H$r<($9$?$a$N$b$N$G$"$k!#L@$i$+$K!"3F%^%&%s%H8e$NA4BN$G$N%+%&%s%H$O(B1$B$D$@$1A}$($k$3$H$+$i!"(B<CODE>do_mount()</CODE>$B$OLa$kA0$K%+%&%s%?$r8:>/$5$;$k$N$G$"$k!#(B
</LI>
<LI>$B2f!9$N>l9g!"(B<CODE>fs_type->fs_flags &amp; FS_REQUIRES_DEV</CODE>$B$,??$G$"$k$J$i!"%V%m%C%/%G%P%$%9$X$N%j%U%!%l%s%9$r<hF@$7!"%U%!%$%k%7%9%F%`$N(B<CODE>read_super()</CODE>$B%a%=%C%I$HO"7H$7$F%9!<%Q!<%V%m%C%/$rKd$a$k(B<CODE>get_sb_bdev()</CODE>$B$r8F$V$3$H$G!"%9!<%Q!<%V%m%C%/$,=i4|2=$5$l$k!#A4$F$,$&$^$/9T$1$P!"(B<CODE>super_block</CODE>$B9=B$BN$O=i4|2=$5$l!"%U%!%$%k%7%9%F%`%b%8%e!<%k$X$N(Bextra$B;2>H$H!"2<$K$"$k%V%m%C%/%G%P%$%9$X$N;2>H$rF@$k$3$H$K$J$k!#(B
</LI>
<LI> $B?7$7$$(B<CODE>vfsmount</CODE>$B9=B$BN$,3d$jEv$F$i$l!"(B<CODE>sb->s_mounts</CODE>$B%j%9%H$H%0%m!<%P%k$J(B<CODE>vfsmntlist</CODE>$B%j%9%H$X%j%s%/$5$l$k!#(B<CODE>vfsmount</CODE>$B$N%a%s%P$N(B<CODE>mnt_instances</CODE>$B$OA4$F$NF1$8%9!<%Q!<%V%m%C%/$K%^%&%s%H$5$l$F$$$k%$%s%9%?%s%9$r8+$D$1$i$l$k$h$&$K$9$k!#(B
<CODE>mnt_list</CODE>$B%a%s%P$O!"%7%9%F%`A4BN$NA4$F$N%9!<%Q!<%V%m%C%/$KBP$7$F!"A4$F$N%$%s%9%?%s%9$r8+$D$1$k$3$H$,$G$-$k$h$&$K$9$k!#(B<CODE>mnt_sb</CODE>$B%a%s%P$O$3$N%9!<%Q!<%V%m%C%/$r;X$7!"(B<CODE>mnt_root</CODE>$B$O(B<CODE>sb->s_root</CODE> dentry $B$X$N?7$7$$;2>H$r;}$D!#(B</LI>
</OL>
</P>

<H2><A NAME="ss3.6">3.6</A> <A HREF="Linux-Kernel-Internals.html#toc3.6">$B2>A[%U%!%$%k%7%9%F%`$NNc(B: pipefs</A>
</H2>


<P>$B%^%&%s%H$K%V%m%C%/%G%P%$%9$,I,MW$J$$4JC1$J(B Linux $B%U%!%$%k%7%9%F%`$NNc$H$7$F!"(B<CODE>fs/pipe.c</CODE>$B$+$i(Bpipefs$B$r<h$j>e$2$^$7$g$&!#%U%!%$%k%7%9%F%`$NA0DsItJ,$O$+$J$j4JC1$G!"$A$g$C$H$7$?@bL@$G==J,$G$9!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
static DECLARE_FSTYPE(pipe_fs_type, "pipefs", pipefs_read_super,
        FS_NOMOUNT|FS_SINGLE);

static int __init init_pipe_fs(void)
{
        int err = register_filesystem(&amp;pipe_fs_type);
        if (!err) {
                pipe_mnt = kern_mount(&amp;pipe_fs_type);
                err = PTR_ERR(pipe_mnt);
                if (!IS_ERR(pipe_mnt))
                        err = 0;
        }
        return err;
}

static void __exit exit_pipe_fs(void)
{
        unregister_filesystem(&amp;pipe_fs_type);
        kern_umount(pipe_mnt);
}

module_init(init_pipe_fs)
module_exit(exit_pipe_fs)
</PRE>
<HR>
</CODE></BLOCKQUOTE>
</P>
<P>$B$3$N%U%!%$%k%7%9%F%`$O!"%f!<%66u4V$+$i%^%&%s%H$G$-$:!"%7%9%F%`A4BN$G0l$D$N%9!<%Q!<%V%m%C%/$N$_;}$F$k$3$H$r0UL#$9$k(B<CODE>FS_NOMOUNT|FS_SINGLE</CODE>$B7?$K$J$C$F$$$^$9!#(B
<CODE>FS_SINGLE</CODE>$B$G$"$k%U%!%$%k$OF1MM$K!"(B<CODE>register_filesystem()</CODE>$B$r;H$C$FEPO?@.8y$7$?$"$H$K!"(B<CODE>kern_mount()</CODE>$B$r;H$C$F%^%&%s%H$5$l$J$1$l$P$J$i$J$$$3$H$r0UL#$7$F$$$^$9!#$3$l$O!"$^$5$K!"(B<CODE>init_pipe_fs()</CODE>$B$G9T$o$l$k$3$H$G$9!#$3$N4X?t$NM#0l$N%P%0$O!"$b$7(B<CODE>kern_mount()</CODE>$B$,<:GT$7$?>l9g(B($BNc$($P!"(B<CODE>kmalloc()</CODE>$B$,(B<CODE>add_vfsmnt()</CODE>$BCf$G<:GT$7$?$H$-$J$I(B)$B$K!"%U%!%$%k%7%9%F%`$OEPO?$5$l$?>uBV$G;D$j$^$9$,!"%b%8%e!<%k$N=i4|2=$O<:GT$K$J$k$3$H$G$9!#(B
$B$3$l$O!"(B<B>cat /proc/filesystems</B>$B$N(B Oops $B%(%i!<$N860x$K$J$j$^$9!#(B($BCzEY(B Linus $B$K!"$3$l$rCN$i$;$k%Q%C%A$rAw$C$?!#(Bpipefs $B$O%b%8%e!<%k$H$7$F%3%s%Q%$%k$G$-$J$$$?$a$3$l$O??$N%P%0$G$O$J$$$,!">-Mh%b%8%e!<%k$K$J$k$H$-$r9M$($F=q$+$l$k$Y$-$@$H;W$&(B)$B!#(B</P>
<P><CODE>register_filesystem()</CODE>$B$N7k2L$H$7$F!"(B<CODE>pipe_fs_type</CODE>$B$,(B<CODE>fle_systems</CODE>$B%j%9%H$K%j%s%/$5$l$k$3$H$K$J$j$^$9!#$D$^$j(B<CODE>/proc/filesystems</CODE>$B$rFI$_=P$7$F!"(B<CODE>FS_REQUIRES_DEV</CODE>$B$,@_Dj$5$l$F$$$J$$$3$H$r<($9!V(Bnodev$B!W%U%i%0$D$-$G!V(Bpipefs$B!W$,EPO?$5$l$F$$$k$N$r8+$D$1$i$l$k$3$H$K$J$j$^$9!#(B<CODE>/proc/filesystems</CODE>$B%U%!%$%k$O!"?7$7$$(B<CODE>FS_</CODE>$B%U%i%0$rA4$F%5%]!<%H$9$k$h$&!"$^$5$K5!G=6/2=$5$l$k$Y$-$G$9(B($B$=$7$F!";d$O$=$N%Q%C%A$r:n$j$^$7$?(B)$B!#$7$+$7!"$3$l$r;H$&A4$F$N%f!<%6$N%"%W%j%1!<%7%g%s$,F0$+$J$/$J$k$?$a!":#$@<B9T$9$k$3$H$,$G$-$^$;$s!#(B 
Linux $B%+!<%M%k%$%s%?!<%U%'!<%9$,?o;~JQ99$5$l$F$$$k(B($BC1$KNI$/$9$k$?$a$K(B)$B$K$b4X$o$i$:!"%f!<%66u4V$G$N8_49@-$K5Z$V$H$J$k$H!"(BLinux $B$O$H$F$bJ]<iE*$J%*%Z%l!<%F%#%s%0%7%9%F%`$H$J$j!"D9$$4|4V:F%3%s%Q%$%k$r$7$J$$$GB?$/$N%"%W%j%1!<%7%g%s$,;H$($k$h$&$K$9$k$N$G$9!#(B</P>
<P><CODE>kern_mount()</CODE>$B$N7k2L$O<!$N$h$&$K$J$j$^$9!#(B</P>
<P>
<OL>
<LI>$B?7$?$JL5L>$N(B(anonymous)$B%G%P%$%9HV9f$,3d$jEv$F$i$l!"(B<CODE>unnamed_dev_in_use</CODE>$B%S%C%H%^%C%W$N%S%C%H$,@_Dj$5$l$k!#$b$73d$jEv$F$k%S%C%H$,$J$1$l$P!"(B<CODE>kern_mount()</CODE>$B$O(B<CODE>EMFILE</CODE>$B$G<:GT$9$k!#(B
</LI>
<LI><CODE>get_empty_super()</CODE>$B$K$h$C$F!"?7$?$J%9!<%Q!<%V%m%C%/9=B$BN$,3d$jEv$F$i$l$k!#(B<CODE>get_empty_super()</CODE>$B4X?t$O!"(B<CODE>super_block</CODE>$B$K$h$C$F@hF,$r<($5$l$k%9!<%Q!<%V%m%C%/$N%j%9%H$r8+$F!"(B<CODE>s->s_dev == 0</CODE>$B$H$J$k6u$N%(%s%H%j!<$rC5$9!#(B
</LI>
<LI> $B%U%!%$%k%7%9%F%`FCM-$N(B<CODE>pipe_fs_type->read_super()</CODE>$B%a%=%C%I(B($B$D$^$j(B<CODE>pipefs_read_super()</CODE>$B$@$,(B)$B$,5/F0$5$l!"%k!<%H$N(Binode$B$H%k!<%H$N(Bdentry$B$H$J$k(B <CODE>sb->s_root</CODE>$B$r3d$jEv$F!"(B<CODE>sb->s_op</CODE>$B$r(B<CODE>&amp;pipefs_ops</CODE>$B$K$J$k$h$&@_Dj$9$k!#(B
</LI>
<LI>$B$=$7$F(B <CODE>kern_mount()</CODE> $B$,(B $B?7$7$$(B<CODE>vfsmount</CODE>$B9=B$BN$r3d$jEv$F!"(B<CODE>vfsmntlist</CODE>$B$H(B<CODE>sb->s_mounts</CODE> $B$X%j%s%/$9$k(B<CODE>add_vfsmnt(NULL, sb->s_root, "none")</CODE> $B$r8F$V!#(B
</LI>
<LI><CODE>pipe_fs_type->kern_mnt</CODE>$B$O?7$7$$(B<CODE>vfsmount</CODE>$B9=B$BN$K@_Dj$5$l$FLa$k!#(B<CODE>kern_mount()</CODE>$BJV$jCM$,(B<CODE>vfsmount</CODE>$B9=B$BN$K$J$C$F$$$k$N$O!"(B<CODE>FS_SINGLE</CODE>$B$N%U%!%$%k%7%9%F%`$G$5$(J#?t2s%^%&%s%H$G$-$k$3$H$+$i!"(B<CODE>mnt->mnt_sb</CODE>$B$O(B<CODE>kern_mount()</CODE>$B$NJ#?t2s$N8F$S=P$7$+$i$NLa$j$G$"$C$?$H$7$F$bF1$8$b$N$r;X$7$FLa$k$?$a$G$"$k!#(B</LI>
</OL>
</P>
<P>$B$3$l$G%U%!%$%k%7%9%F%`$OEPO?$5$l!";d$?$A$,;H$($k$h$&$K%+!<%M%kFb$K%^%&%s%H$5$l$^$7$?!#(Bpipefs$B%U%!%$%k%7%9%F%`$N%(%s%H%j%]%$%s%H$O!"(B<B>pipe(2)</B>$B%7%9%F%`%3!<%k$H$J$j!"$3$l$O%"!<%-%F%/%A%c0MB8$N(B<CODE>sys_pipe()</CODE>$B$X<BAu$5$l$F$$$^$9$,!"<B:]$K$O%"!<%-%F%/%A%cHs0MB8$N(B<CODE>fs/pipe.c:do_pipe()</CODE>$B4X?t$G=hM}$5$l$^$9!#$3$l$+$i(B<CODE>do_pipe()</CODE>$B$r8+$F$$$3$&$H;W$$$^$9!#(Bpipefs $B$H$NAj8_:nMQ$O!"(B<CODE>do_pipe()</CODE>$B$,(B<CODE>get_pipe_inode()</CODE>$B$r?7$7$$(B pipefs $B$N(B inode $B$r3d$jEv$F$k$?$a$K8F$S=P$7$?$H$-$K5/$3$j$^$9!#$3$N(B inode $B$N$?$a$K!"(B<CODE>inode->i_sb</CODE>$B$O!"(Bpipefs $B$N%9!<%Q!<%V%m%C%/(B<CODE>pipe_mnt->mnt_sb</CODE>$B$X@_Dj$5$l$^$9!#$=$7$F%U%!%$%k$NA`:n(B<CODE>i_fop</CODE>$B$O(B<CODE>rdwr_pipe_fops</CODE>$B$K@_Dj$5$l$F!"(B(<CODE>inode->i_pipe</CODE>$B$KJ];}$5$l$k(B)$BFI$_=q$-$9$k<T$N?t$O(B 1 $B$K@_Dj$5$l$^$9!#(B<CODE>fs-private</CODE> $B6&MQBN$XJ]B8$9$kBe$j$K!"JL$N(B inode $B%a%s%P(B <CODE>i_pipe</CODE> $B$,$"$kM}M3$O!"(Bpipe $B$H(B FIFO $B$,F1$8%3!<%I$r6&M-$7$F$$$k$?$a$H!"F1$86&MQBN$NCf$NB>$N%"%/%;%9%Q%9$r;H$&J#?t$N(B FIFO $B$,B>$N%U%!%$%k%7%9%F%`>e$KB8:_$G$-$k$h$&$K$"$&$k$?$a$G$9!#$3$l$O$H$F$b0-$$(B C $B$N;H$$J}$G$"$j!"=c?h$K1?$@$1$GF0$-$^$9!#$=$N$?$a!"$=$&!"(B2.2.x $B%+!<%M%k$O!"1?$@$1$GF0$$$F$$$k$N$G$9!#(Binode $B$N%U%#!<%k%I$r$9$3$7D4@0$9$l$P$9$0$K=hM}$rDd;_$7$F$7$^$&$3$H$K$J$k$G$7$g$&!#(B</P>
<P><B>pipe(2)</B>$B%7%9%F%`%3!<%kKh$K!"(B<CODE>pipe_mnt</CODE>$B%^%&%s%H%$%s%9%?%s%9$N;2>H%+%&%s%?$OA}J,$5$l$^$9!#(B</P>
<P>Linux $B$K$*$$$F$O(B $B%Q%$%W$OBP>N!JAPJ}8~$"$k$$$O(BSTREAM pipe)$B$G$O$J$/!"$D$^$j%U%!%$%k$NN>B&$G!"(B<CODE>read_pipe_fops</CODE>$B$H(B<CODE>write_pipe_fops</CODE>$B$=$l$>$l$N(B <CODE>file->f_op</CODE> $BA`:n$O;}$F$^$;$s!#(B</P>

<H2><A NAME="ss3.7">3.7</A> <A HREF="Linux-Kernel-Internals.html#toc3.7">$B%G%#%9%/%U%!%$%k%7%9%F%`$NNc(B:BFS</A>
</H2>


<P>$B4JC1$J%G%#%9%/>e$N(B Linux $B%U%!%$%k%7%9%F%`$NNc$H$7$F(BBFS$B$r9M$($F$_$^$7$g$&!#(BBFS$B%b%8%e!<%k$N%W%j%"%s%V%k$O(B<CODE>fs/bfs/inode.c</CODE>$B$K$"$j!"(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
static DECLARE_FSTYPE_DEV(bfs_fs_type, "bfs", bfs_read_super);

static int __init init_bfs_fs(void)
{
        return register_filesystem(&amp;bfs_fs_type);
}

static void __exit exit_bfs_fs(void)
{
        unregister_filesystem(&amp;bfs_fs_type);
}

module_init(init_bfs_fs)
module_exit(exit_bfs_fs)
</PRE>
<HR>
</CODE></BLOCKQUOTE>

$B$H$J$C$F$$$^$9!#(B</P>
<P>$BFCJL$J(Bfstype $BDj5A%^%/%m(B<CODE>DECLARE_FSTYPE_DEV()</CODE>$B$,;H$o$l$F!"(B<CODE>fs_type->flags</CODE>$B$r(B <CODE>FS_REQUIRES_DEV</CODE>$B$K@_Dj$5$l!"(BBFS $B$,%^%&%s%H$9$k<B:]$N%V%m%C%/%G%P%$%9$,I,MW$G$"$k$3$H$r<($7$F$$$^$9!#(B</P>
<P>$B%b%8%e!<%k$N=i4|2=4X?t$O%U%!%$%k%7%9%F%`$H(B(BFS$B$,%b%8%e!<%k$H$7$F@_Dj$5$l$?$H$-$N$_B8:_$9$k(B)$BEPO?2r=|$r9T$&2r=|4X?t$r(BVFS$B$KEPO?$7$^$9!#(B</P>
<P>$B%U%!%$%k%7%9%F%`$NEPO?$r9T$&$3$H$G!"%^%&%s%H$r?J$a$k$3$H$,$G$-$^$9!#%^%&%s%H$G$O(B<CODE>fs/bfs/inode.c:bfs_read_super()</CODE> $B$K<BAu$5$l$F$$$k(B <CODE>fs_type->read_super()</CODE>$B%a%=%C%I$,5/F0$5$l$^$9!#$3$N4X?t$O<!$N$h$&$J=hM}$r9T$$$^$9!#(B</P>
<P>
<OL>
<LI><CODE>set_blocksize(s->s_dev, BFS_BSIZE)</CODE>: $B%V%m%C%/7?%G%P%$%9AX$H%P%C%U%!%-%c%C%7%e$rDL$7$FAj8_:nMQ$7$h$&$H$7$F$$$k$3$H$+$i!"Fs$D;0$D$N=i4|2=$r9T$&I,MW$,$"$k!#$9$J$o$A!"%V%m%C%/%5%$%:$r@_Dj$7$F!"$5$i$K(B <CODE>s->s_blocksize</CODE> $B$H(B <CODE>s->s_blocksize_bits</CODE> $B%a%s%P$rDL$8$F(B VFS $B$XDLCN$9$k$N$@!#(B
</LI>
<LI><CODE>bh = bread(dev, 0, BFS_BSIZE)</CODE>: $B%G%P%$%9$N%V%m%C%/#0$rFI$_!"(B<CODE>s->s_dev</CODE> $B$rDL$8$FEO$9!#$3$N%V%m%C%/$O%U%!%$%k%7%9%F%`$N%9!<%Q!<%V%m%C%/$G$"$k!#(B
</LI>
<LI>$B%9!<%Q!<%V%m%C%/$O(B<CODE>BFS_MAGIC</CODE>$BHV9f$KBP$7$F@5Ev@-$r3NG'$7!"(Bsb$B%W%i%$%Y!<%H%a%s%P(B<CODE>s->su_sbh</CODE>$B$X3JG<$9$k(B($B<B:]$O(B<CODE>s->u.bfs_sb.si_sbh</CODE>$B$G$"$k(B)$B!#(B
</LI>
<LI>$B$=$7$F!"(B inode $B%S%C%H%^%C%W$r(B<CODE>kmalloc(GFP_KERNEL)</CODE> $B$r;H$C$F3d$jEv$F!"(B1$B$K@_Dj$5$l$k:G=i$N(B2$B$D$r=|$/A4$F$N%S%C%H$r(B0$B$K@_Dj$9$k!#$3$l$O!"(Binode 0$B$H(B1$B$r$:$C$H3d$jEv$F$J$$$3$H$r<($9$?$a$G$"$k!#(Binode 1$B$O%k!<%H$G$"$j!"4XO"$9$k%S%C%H$O$$$:$l?t9T8e$K(B1$B$K@_Dj$5$l$k!#$H$$$&$N$O!"%U%!%$%k%7%9%F%`$O%^%&%s%H$5$l$k$H$-$K$OI,$:BEEv$J%k!<%H(B inode $B$r;}$C$F$k$Y$-$b$N$@$+$i$@!#(B
</LI>
<LI> $B$=$7$F(B<CODE>s->s_op</CODE>$B$r=i4|2=$9$k!#$3$l$O(B<CODE>s_op->read_inode()</CODE>$B$,5/F0$5$l$k7k2L$H$7$F(B<CODE>iget()</CODE>$B$rDL$8$F!"$3$N;~E@$+$i(B inode $B%-%c%C%7%e$r8F$S=P$9$3$H$,$G$-$k!#$3$l$O!"(B(<CODE>inode->i_ino</CODE>$B$H(B<CODE>inode->i_dev</CODE>$B$K$h$k(B)$BFCDj$N(Binode $B$+$i$J$k%V%m%C%/$r8+$D$1$FFI$_9~$`!#(B
$B$b$7%k!<%H(B inode $B$N<hF@$,<:GT$7$?$i!"(Binode $B%S%C%H%^%C%W$r2rJ|$7!"%P%C%U%!!<%-%c%C%7%e$NGX8e$K$"$k%9!<%Q!<%V%m%C%/%P%C%U%!!<$r2rJ|$7$F!"(BNULL $B$rJV$9!#$b$7%k!<%H(B inode $B$NFI$_9~$_$,(BOK$B$G$"$l$P!"(B($B%k!<%H$H$J$k(B)<CODE>/</CODE>$B$H$$$&L>A0$N(Bdentry$B$r3d$jEv$F!"$3$N(B inode $B$r<BBN2=$9$k!#(B
</LI>
<LI>$B$5$F!"%U%!%$%k%7%9%F%`$NA4$F$N(B inode $B$r8+$F!"FbIt$N(B inode $B%S%C%H%^%C%W$N4XO"$9$k%S%C%H$r@_Dj$9$k$?$a$K!"$=$l$rA4$FFI$_9~$`!#$=$7$F!":G8e$N(B inode $B$N%*%U%;%C%H$d:G8e$N%U%!%$%k$N3+;O(B/$B=*N;%V%m%C%/$N$h$&$J$=$NB>$NFbIt%Q%i%a!<%?$r7W;;$9$k!#FI$_9~$`3F(B inode $B$O(B inode $B%-%c%C%7%e$X(B <CODE>iput()</CODE>$B$rDL$8$FLa$5$l$k!#$=$&!"I,MW0J>e$KD9$/;2>H$rJ];}$G$-$J$$$N$@!#(B
</LI>
<LI>$B$b$7%U%!%$%k%7%9%F%`$,FI$_9~$_@lMQ$G%^%&%s%H$5$l$J$1$l$P!"%9!<%Q!<%V%m%C%/%P%C%U%!$r(Bdirty$B$H0u$r$D$1!"(B<CODE>s->s_dirt</CODE>$B%U%i%0$r@_Dj$9$k(B(TODO: $B$J$<$3$l$r$d$k$N$+(B? $BIaDL$O!"$3$l$O(B<CODE>minix_read_super()</CODE>$B$,$d$k$+$i$J$N$@$,!"(Bminix$B$b(BBFS $B$b(B<CODE>read_super()</CODE>$B$G%9!<%Q!<%V%m%C%/$r=q$-49$($F$$$J$$$h$&$J$N$@(B)$B!#(B
</LI>
<LI>$BA4$F$,$&$^$/9T$1$P!"(BVFS$BAX$N8F$S=P$7!"$D$^$j(B<CODE>fs/super.c:read_super()</CODE>$B$X!"$3$N=i4|2=$5$l$?%9!<%Q!<%V%m%C%/$rJV$9!#(B</LI>
</OL>
</P>
<P><CODE>read_super()</CODE>$B4X?t$,@.8y$7$FLa$C$?8e!"(B<CODE>fs/super.c:get_sb_bdev()</CODE>$B$N(B<CODE>get_filesystem(fs_type)</CODE>$B8F$S=P$7$rDL$8$F(B VFS $B$O%U%!%$%k%7%9%F%`%b%8%e!<%k$X$N;2>H$H%V%m%C%/%G%P%$%9$X$N;2>H$rF@$^$9!#(B</P>
<P>$B$3$3$G!"%U%!%$%k%7%9%F%`$X(B I/O $B$r9T$&$H$-$K$J$K$,5/$k$+$r9M$($F$_$^$7$g$&!#$9$G$K(B <CODE>iget()</CODE>$B$,8F$P$l$k$H$-$K(Binode$B$,$I$N$h$&$KFI$^$l$k$+!"$^$?(B<CODE>iput()</CODE>$B$G$I$N$h$&$K2rJ|$5$l$k$+$O8+$F$-$^$7$?!#(B
inode $B$NFI$_9~$_$O!"B>$N$3$H$K:.$8$C$F(B<CODE>inode->i_op</CODE>$B$H(B<CODE>inode->i_fop</CODE>$B$N;vA0@_Dj$r9T$&$3$H$K$J$j$^$9!#%U%!%$%k$N%*!<%W%s$O!"(B<CODE>inode->i_fop</CODE>$B$+$i(B<CODE>file->f_op</CODE>$B$XEAHB$7$^$9!#(B</P>
<P>$B$5$F!"(B<B>link(2)</B>$B%7%9%F%`%3!<%k$N%3!<%I$NDL$jF;$r$_$F$$$-$^$7$g$&!#%7%9%F%`%3!<%k$N<BAu$O(B<CODE>fs/namei.c:sys_link()</CODE>$B$K$"$j$^$9!#(B</P>
<P>
<OL>
<LI> $B%f!<%66u4V$NL>A0$O%+!<%M%k6u4V$X%(%i!<%A%'%C%/$r9T$&(B<CODE>getname()</CODE>$B4X?t$r;H$C$F%3%T!<$5$l$k!#(B
</LI>
<LI> $B$3$l$i$NL>A0$O(B<CODE>path_init()/path_walk()</CODE>$B$r;H$C$F(B nameidata $B$KJQ49$5$l!"(Bdcache $B$HAj8_:nMQ$9$k!#7k2L$O(B <CODE>old_nd</CODE> $B$H(B<CODE>nd</CODE>$B9=B$BN$X3JG<$5$l$k!#(B
</LI>
<LI> <CODE>old_nd.mnt != nd.mnt</CODE>$B$G$"$C$?$i!"!V%/%m%9%G%P%$%9%j%s%/!W(B<CODE>EXDEV</CODE>$B$,JV$5$l$k!#%U%!%$%k%7%9%F%`$rD6$($?%j%s%/$O$G$-$J$$$,!"(BLinux $B$G$O$=$l$r%U%!%$%k%7%9%F%`$N%^%&%s%H$5$l$?%$%s%9%?%s%9(B($B$"$k$$$OFCDj$N%U%!%$%k%7%9%F%`4V(B)$B$rD6$($?%j%s%/$,$G$-$J$$$H2r<a$7$F$$$k!#(B
</LI>
<LI> $B?7$7$$(B dentry $B$,:n$i$l(B<CODE>nd</CODE>$B$X(B<CODE>lookup_create()</CODE>$B$K$h$C$F4XO"$E$1$i$l$k!#(B
</LI>
<LI> $B0lHLE*$J(B<CODE>vfs_link()</CODE>$B4X?t$,8F$P$l!"%G%#%l%/%H%j$K?7$7$$%(%s%H%j!<$r:n$k$3$H$,$G$-$k$+$I$&$+%A%'%C%/$9$k!#$=$7$F!"(B<CODE>dir->i_op->link()</CODE>$B%a%=%C%I$r8F$S=P$9!#$3$l$O%U%!%$%k%7%9%F%`$KFCM-$N(B<CODE>fs/bfs/dir.c:bfs_link()</CODE>$B4X?t$r8F$S=P$9$3$H$K$J$k!#(B
</LI>
<LI><CODE>bfs_link()</CODE>$B$NFbIt$G$O!"%G%#%l%/%H%j$r%j%s%/$7$h$&$H$7$F$$$J$$$+%A%'%C%/$7!"$b$7$=$&$G$"$l$P(B<CODE>EPERM</CODE>$B%(%i!<$G5qH]$9$k!#$3$l$OI8=`%U%!%$%k%7%9%F%`(B(ext2)$B$rF1$85sF0$G$"$k!#(B
</LI>
<LI>$B$X%k%Q!<4X?t(B<CODE>bfs_add_entry()</CODE>$B$r8F$S=P$7$F?7$7$$%G%#%l%/%H%j%(%s%H%j$rFCDj$N%G%#%l%/%H%j$KDI2C$7$h$&$H$9$k!#$3$N4X?t$O!";HMQ$7$F$$$J$$%9%m%C%H(B(<CODE>de->ino == 0</CODE>)$B$rC5$7$FA4$F$N%(%s%H%j!<$r8+$F$$$-!"8+$D$+$C$?$J$i$P!"(B name/inode $B$NBP$r4XO"$9$k%V%m%C%/$X=q$-=P$7$F!"(B dirty$B$N0u$r(B($B%9!<%Q%V%m%C%/0J30$NM%@hEY$G(B)$B$D$1$k!#(B
</LI>
<LI> $B$b$7!"%G%#%l%/%H%j%(%s%H%j$NDI2C$,@.8y$7$?$i!"A`:n$,<:GT$9$k$3$H$O$J$$$?$a!"(B<CODE>inode->i_nlink</CODE>$B$rA}J,$7!"(B<CODE>inode->i_ctime</CODE>$B$r99?7$7$F!"(Binode $B$H0l=o$K%$%s%9%?%s%92=$7$??7$7$$(Bdentry$B$HF1MM$K!"$3$N(B inode $B$r(B dirty $B$H%^!<%/$9$k!#(B</LI>
</OL>
</P>
<P><CODE>unlink()/rename()</CODE>$B$N$h$&$JB>$N4XO"(B inode $BA`:n$b!"F1$8$h$&$J$d$jJ}$GF/$-$^$9!#$7$?$,$C$F!"$"$^$j%a%j%C%H$,$J$$$?$a!"$3$3$GA4$F$N>\:Y$r07$&$3$H$O$7$^$;$s!#(B</P>

<H2><A NAME="ss3.8">3.8</A> <A HREF="Linux-Kernel-Internals.html#toc3.8">$B<B9T%I%a%$%s$H%P%$%J%j%U%)!<%^%C%H(B</A>
</H2>


<P>Linux $B$O!"%G%#%9%/$+$i$N%f!<%6%"%W%j%1!<%7%g%s%P%$%J%j$NFI$_9~$_$r%5%]!<%H$7$F$$$^$9!#$b$C$HLLGr$$$3$H$K$O!"$=$N%P%$%J%j$O!"B>$N%U%)!<%^%C%H$GJ]B8$5$l$F$$$F$b9=$$$^$;$s!#%W%m%0%i%`$KBP$9$k%7%9%F%`%3!<%k$rDL$8$?%*%Z%l!<%F%#%s%0%7%9%F%`$NH?1~$O!"(B
$BB>$N(B UNIX $B$K8+$i$l$k%U%)!<%^%C%H(B(COFF$B$J$I(B)$B$r%(%_%e%l!<%H$7!"$5$i$KB>$N%?%$%W(B(Solaris, Unixware$B$J$I(B)$B$N%7%9%F%`%3!<%k$N?6$kIq$$$r%(%_%e%l!<%H$9$k$?$a$K!"I,MW$J$i$P!"I8=`(B(Linux $B$N?6$kIq$$$r$9$kI8=`(B)$B$+$i30$l$k$3$H$,$G$-$^$9!#$3$l$,!"<B9T%I%a%$%s$H%P%$%J%j%U%)!<%^%C%H$,I,MW$K$J$kM}M3$K$J$C$F$$$^$9!#(B</P>
<P>$B3F(B Linux $B$N%?%9%/$O!"(B<CODE>task_struct</CODE>(<CODE>p->personality</CODE>)$B$N$J$+$K$=$l$>$l$N%Q!<%=%J%j%F%#$r;}$C$F$$$^$9!#8=:_(B($B@5<0$J%+!<%M%k$bDI2C%Q%C%A$G$b4^$a(B)$BB8:_$9$k%Q!<%=%J%j%F%#$K$O!"(BFreeBSD$B!"(BSolaris$B!"(BUnixWare$B!"(BOpenServer$B$N%5%]!<%H$r4^$_!"$5$i$KB>$N%a%8%c!<$J%*%Z%l!<%F%#%s%0%7%9%F%`$b$"$j$^$9!#(B
$B$=$N(B <CODE>current->personality</CODE> $B$NCM$O(B2$B$D$NItJ,$KJ,$+$l$^$9!#(B</P>
<P>
<OL>
<LI>$B9b0L$N(B3$B%P%$%H(B - $B%P%0%(%_%e%l!<%7%g%s(B: <CODE>STICKY_TIMEOUTS</CODE>, <CODE>WHOLE_SECONDS</CODE>$B$J$I(B</LI>
<LI>$BDc0L$N(B1$B%P%$%H(B - $B%Q!<%=%J%j%F%#$K8GM-$JHV9f(B</LI>
</OL>
</P>
<P>$B%Q!<%=%J%j%F%#$NJQ99$K$h$j!";d$?$A$O%*%Z%l!<%F%#%s%0%7%9%F%`$,%7%9%F%`%3!<%k$r<h$j07$&J}K!$rJQ$($k$3$H$,$G$-$^$9!#$?$H$($P!"(B<CODE>STICKY_TIMEOUT</CODE>$B$r(B<CODE>current->personality</CODE>$B$XM?$($k$3$H$G!"(B<CODE>select(2)</CODE>$B%7%9%F%`%3!<%k$O!";D$j;~4V$rJ]B8$9$k$+$o$j$K!":G8e$N0z?t(B($B%?%$%`%"%&%H(B)$B$NCM$r0];}$7$^$9!#%W%m%0%i%`$NCf$K$O(B(Linux$B$K$O$J$$(B)$B%P%0$N$"$k%*%Z%l!<%F%#%s%0%7%9%F%`$K0MB8$7$?%P%0$N$"$k$b$N$,B8:_$9$k$?$a!"%=!<%9%3!<%I$,F~<j$G$-$:%P%0$r2~=$$G$-$J$$>l9g$N$?$a$K!"(BLinux $B$O%P%0$r%(%_%e%l!<%H$9$kJ}K!$rDs6!$7$F$$$k$N$G$9!#(B</P>
<P>$B<B9T%I%a%$%s$O!"%Q!<%=%J%j%F%#$N1dD9@~>e$K$"$j!"0l$D$N%b%8%e!<%k$H$7$F<BAu$5$l$F$$$^$9!#DL>o0l$D$N<B9T%I%a%$%s$O0l$D$N%Q!<%=%J%j%F%#$r<BAu$7$F$$$^$9$,!"$J$+$K$O!"$=$l$[$IB?$/$J$$>r7o$rK~$?$9$3$H$G0l$D$N%b%8%e!<%k$NCf$K!VJD$8$?!WJ#?t$N%Q!<%=%J%j%F%#$r<BAu$9$k$3$H$b$G$-$^$9!#(B</P>
<P>$B<B9T%I%a%$%s$O(B<CODE>kernel/exec_domain.c</CODE>$B$K<BAu$5$l!"(B2.4 $B%+!<%M%k$G(B 2.2.x $B$+$i40A4$K=q$-D>$5$l$^$7$?!#%5%]!<%H$7$F$$$k%Q!<%=%J%j%F%#$N<oN`$K2C$(!"%+!<%M%k$,8=:_%5%]!<%H$7$F$$$k<B9T%I%a%$%s$N%j%9%H$O!"(B<CODE>/proc/execdomains</CODE>$B%U%!%$%k$rFI$_=P$9$3$H$GF@$k$3$H$,$G$-$^$9!#(B<CODE>PER_LINUX</CODE> $B$r=|$/<B9T%I%a%$%s$O!"F0E*$KFI$_9~$^$l$k%b%8%e!<%k$H$7$F<BAu$G$-$^$9!#(B</P>
<P>$B%f!<%6%$%s%?!<%U%'!<%9$O!"(B<B>personality(2)</B>$B%7%9%F%`%3!<%k$rDL$8$F!"8=:_$N%W%m%;%9$N%Q!<%=%J%j%F%#$r@_Dj$G$-$k$h$&$K$J$C$F$$$^$9!#$"$k$$$O!"$b$70z?t$,B8:_$7$J$$%Q!<%=%J%j%F%#(B 0xffffffff $B$G$"$C$?$i(B<CODE>current->personality</CODE>$B$r$?$@JV$7$^$9!#L@$i$+$K$3$N%7%9%F%`%3!<%k$N?6$kIq$$$O!"%Q!<%=%J%j%F%#$H$OFHN)$G$9!#(B</P>
<P>$B<B9T%I%a%$%sEPO?$N%+!<%M%k%$%s%?!<%U%'!<%9$O(B2$B$D$N4X?t$K$J$C$F$$$^$9!#(B</P>
<P>
<UL>
<LI><CODE>int register_exec_domain(struct exec_domain *)</CODE>: $BFI$_=q$-%9%T%s%m%C%/(B<CODE>exec_domain_lock</CODE>$B$K$h$k=q$-9~$_J]8n$N$b$H!"C1%j%s%/%j%9%H$N(B<CODE>exec_domains</CODE>$B$X<B9T%I%a%$%s$r%j%s%/$9$k$3$H$G!"EPO?$9$k!#@.8y$9$l$P(B0$B$rJV$7!"<:GT$J$iHs(B0$B$H$J$k!#(B
</LI>
<LI><CODE>int unregister_exec_domain(struct exec_domain *)</CODE>: <CODE>exec_domians</CODE>$B%j%9%H$+$i$O$:$9$3$H$K$h$j<B9T%I%a%$%s$rEPO?2r=|$9$k!#EPO?$HF1MM!"(B<CODE>exec_domian_lock</CODE>$B%9%T%s%m%C%/$r=q$-9~$_%b!<%I$GMxMQ$9$k!#@.8y$9$l$P(B0$B$rJV$9!#(B</LI>
</UL>
</P>
<P><CODE>exec_domains_lock</CODE>$B$,FI$_=q$-%m%C%/$G$"$kM}M3$O!"EPO?$HEPO?2r=|MW5a$N$_$,%j%9%H$r=q$-49$(!"(B<B>cat /proc/filesystems</B>$B$,(B<CODE>fs/exec_domain.c:get_exec_domain_list()</CODE>$B$r8F$V$3$H$@$1$,!"%j%9%H$NFI$_=P$7$r9T$&$?$a$G$9!#?7$7$$<B9T%I%a%$%s$NEPO?$K$h$j!"!V(Blcall7 $B%O%s%I%i!W$H%7%0%J%kHV9f$NJQ49%^%C%W$rDj5A$5$l$^$9!#<B:]!"(BABI$B%Q%C%A$O!"$3$N<B9T%I%a%$%s$N9M$(J}$r3HD%$7$F!"(B($B%=%1%C%H%*%W%7%g%s$d%=%1%C%H%?%$%W!"%"%I%l%9%U%!%_%j%#$d%(%i!<HV9f%^%C%W$H$$$C$?(B)$BDI2C$N>pJs$r;}$D$h$&$K$7$F$$$^$9!#(B</P>
<P>$B%P%$%J%j%U%)!<%^%C%H$OF1$8$h$&$K<BAu$5$l$F$$$^$9!#$D$^$j!"C1%j%s%/%j%9%H%U%)!<%^%C%H$r(B<CODE>fs/exec.c</CODE>$B$GDj5A$7!"FI$_=q$-%m%C%/$N(B<CODE>binfmt_lock</CODE>$B$GJ]8n$7$^$9!#(B<CODE>exec_domains_lock</CODE>$B$N$h$&$K!"(B<CODE>binfmt_lock</CODE>$B$O!"%P%$%J%j%U%)!<%^%C%H$NEPO?$dEPO?2r=|$N$H$-$r=|$/$[$H$s$I$N>l9g$KFI$_9~$_$N$_$K$J$C$F$$$^$9!#(B
$B?7$7$$%P%$%J%j%U%)!<%^%C%H$rEPO?$9$k$3$H$G!"(B<CODE>core_dump()</CODE>$B$,$G$-$k$N$HF1MM$K!"?7$7$$(B<CODE>load_binary/load_shlib()</CODE>$B4X?t$K$h$C$F!"(B<B>execve(2)</B>$B%7%9%F%`%3!<%k$O5!G=3HD%$5$l$^$9!#(B<CODE>load_binary()</CODE>$B%a%=%C%I$,!"(B<B>execve(2)</B>$B%7%9%F%`%3!<%k$r<BAu$7$F$$$k(B<CODE>do_execve()</CODE>$B$+$i(B<CODE>search_binary_handler()</CODE>$B$K$h$C$F8F$P$l$F$$$k$H$-$K!"(B<CODE>load_shlib()</CODE>$B%a%=%C%I$O8E$$(B<B>uselib(2)</B>$B%7%9%F%`%3!<%k$K$h$C$F$N$_;H$o$^$9!#(B</P>
<P>$B%W%m%;%9$N%Q!<%=%J%j%F%#$O!"<c43$NH/8+E*<jK!$r$D$+$C$FBP1~$9$k%U%)!<%^%C%H$N(B<CODE>load_binary()</CODE>$B%a%=%C%I$+$iFI$_9~$^$l$?%P%$%J%j!<%U%)!<%^%C%H$K$h$C$F7hDj$5$l$^$9!#(B
UnixWare7$B%P%$%J%j$r7hDj$9$kNc$H$7$F$O!"$^$:(B<B>elfmark(1)</B>$B%f!<%F%#%j%F%#$r;H$C$F!"(BELF$B$N$X%C%@!<$N(B<CODE>e_flags</CODE>$B$K!"%^%8%C%/CM(B 0x314B4455$B$K@_Dj$7!"0u$r$D$1$^$9!#(B
$B$3$N%^%8%C%/CM$O!"(BELF$B$N%m!<%I;~$K8!=P$5$l!"(B<CODE>current->personality</CODE>$B$K(BPER_UW7$B$r@_Dj$7$^$9!#(B</P>
<P>$B0lEY%Q!<%=%J%j%F%#(B($B$H!"=>$C$F(B<CODE>current->exzec_domain</CODE>)$B$,J,$+$l$P!"%7%9%F%`%3!<%k$O<!$N$h$&$K<h$j07$$$^$9!#%W%m%;%9$,(B lcall7 $B%2!<%HL?Na$r;H$C$F%7%9%F%`%3!<%k$rH/9T$7$?$H$7$^$7$g$&!#(B
$B$3$l$O@)8f$r(B <CODE>arch/i386/kernel/entry.S</CODE>$B$N(B<CODE>ENTRY(lcall7)</CODE>$B$K0\$7$^$9!#$J$<$J$i$3$l$O!"(B<CODE>arch/i386/kernel/traps.c:trap_init()</CODE>$B$K=`Hw$5$l$F$$$k$?$a$G$9!#(B
$BE,@Z$J%9%?%C%/3d$jEv$F$NJQ49$N$"$H!"(B<CODE>entry.S:lcall7</CODE>$B$O(B<CODE>current</CODE> $B$+$i(B <CODE>exec_domain</CODE> $B$X$N%]%$%s%?$H!"$=$7$F(B($B%"%;%s%V%i$G(B4$B$K%O!<%I%3!<%I$5$l$F$*$j!"(B<CODE>struct exec_domain</CODE>$B$N(BC$B$NDj5A$G!"(B<CODE>handler</CODE>$B%a%s%P$r0\F0$G$-$J$$$N$G$"$k$,(B)<CODE>exec_domain</CODE>$BCf$N(B lcall7 $B%O%s%I%i$N%*%U%;%C%H$rF@$F!"$=$3$X%8%c%s%W$7$^$9!#$=$&$G$9!"(BC$B$G$O!"<!$N$h$&$K$J$j$^$9!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<HR>
<PRE>
static void UW7_lcall7(int segment, struct pt_regs * regs)
{
       abi_dispatch(regs, &amp;uw7_funcs[regs->eax &amp; 0xff], 1);
}
</PRE>
<HR>
</CODE></BLOCKQUOTE>
</P>
<P><CODE>abi_dispatch()</CODE>$B$O!"4X?t%]%$%s%?$NI=$X$N%i%C%Q!<$G$"$j!"$=$l$O$3$N%Q!<%=%J%j%F%#$N%7%9%F%`%3!<%k$N(B<CODE>uw7_funcs</CODE>$B$r<BAu$7$?$b$N$K$J$C$F$$$^$9!#(B</P>

<HR>
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