[PATCH] 2.0.36 NetApp snapshot support

Bill Rugolsky Jr. (rugolsky@ead.dsa.com)
Fri, 11 Dec 1998 14:02:07 -0500


Hi,

This patch is a somewhat ugly hack to backport (at least conceptually)
the NetApp ".snapshot" fix in 2.1.x (see fs/nfs/inode.c). The problem
is that the NetApp uses the same inode numbers for a file and all of
its snapshots.

The patch probably does more checks than strictly necessary.

There is also a one-line change to nfs_sillyrename_cleanup() to fix an
obscure array size inconsistency. Alan -- ought the "silly" format
string be ".nfs%lu", not ".nfs%ld" ?

Caveat: I currently have the NetApp mounted read-only on 2.0.35 and it
seems to be behaving. (The patch is against 2.0.36; it applies cleanly
to either.) Since I haven't spent the time to grok the fs code, I'm
not sure whether allocating unhashed inodes as in 2.1.x is really OK.

Please CC any feedback to me, as I am not subscribed to the list.

Bill Rugolsky
rugolsky@ead.dsa.com

begin 644 2.0.36-netapp-snapshot-patch.gz
M'XL("#!6<38"`S(N,"XS-BUN971A<'`M<VYA<'-H;W0M<&%T8V@`Y5GK;]O(
M$?\L_Q5C!S4DD9))O6Q)9U\,1VE\3>1#E+1%TX"@I:7%6B(%/A+G&O_OG=G9
MY4.OVL'UOM2`+9$SL[/S^LWL>N9['C2B%!9^D#XT6DVKV>Z=>/%)@+\S/VI.
MF5)Z==!H-'8+5"9I`./P"]A=L-N#=GM@=\#N]\\.#,/8LEKE=>3#*S$%VP:[
M-6A9@VZ;^5^^A(;=LLP>&/1Q"B]?'D`E3MS$G\+]3'QQ$I@Z^`GG8`USDA_0
M>S\(-][%_F]B>&#HEW$2I=,$<"N.-T>R-W>#V0(Y``5)(A)QNDB&ZLDW<9F9
M>&!U<G?=,]R687?[YIG<'7*>U"&)OD$2@H?<X*-<`,E<P-2=XM_Z"7(U*KX'
M5=SA3#0N?#;A7-ER?`P9`;\P`;_4X-^X\^?+H1#@#Y(/EV(Y7:ZJX]<3Y_4;
M7J9F'F=VFTR87/]C5"-M4*EX883ZI,'@PT_:A>`;AN*0._+\Q:IQX3FK,&:]
M(D`??/(_-Z=A>.\+S<O;9Q9:"!I@$TWZ\JPC(WW6TY&6W!P"N`!++Z)#7G3#
M4%&DX24_4+B)HFQ$:KUDOY:4VSDO1+Q2D49`9@X8Y'H5?Y9[E#MO62W:><OJ
MJBQ`V=M(N/=#;40I,(<ZH$5&@QF?$R%I6%E/(!X2B@&JD%MN7"C_K^^)S#`,
M3N)61SJ^U>DKQV]6QP)725>.S&#E#(J%JD'E?UDBM&.NL&)I8:$7BJLRG;L1
M5L="!.Y2?"*;WEW^?7SY[NUHC$ZV/W/=%A<H"!<);I+@0O17F=*3:-'JY3FD
M@[AN!BKR,[\I9ZEZPMVJM"*Z*A[%(@TL,'&!K5?8L5XPM]L$%51\5],/,I`%
M)8=H7$`+:.>86F_^HN2N&D<V$DD:!<Q+1G%>MFWIC;9]JKU1-J)@@W+L=/6M
MNJ%0?Y,IKZEY-66A,2J;5A?*C>PNKB!C1_(<OHP@'E9^A`D8!L[,36B%?V&3
M\D5,]3=QKB>OKM]7I5#C8DGU01[X6;IE,GK_U]%[J:EQX4[Q<XG8.]A&B\0=
MTFJ<-NUVEV"\W6EG!<P>I6VM0R`M]O;FYB\??W6N+J_>C!P*8A$1]V=<8VO&
M,7X77=,DM_LSHO*WFL:(YXONR=`RL&C$*<%,!H5*)_?:QP-06=:UI/.*/?#_
MRF?$O]MEFWF>>ZXG^T;[M)7/-MNQ34&FA$LL1NR&)13X&6S,<B08C)V$Q"**
MPHB*DAZ\A7L7J\@AO:Z:ZCF,/[Y]*R701X=8&_#].QSJ(E/P((M,=^GV:=^T
M:=-]RVRU5+'DZZ'(,"\?G2D\[E0WRI"W=<S&W'P<?W#&-Y=7-37FL/ZT2=[P
MFT7>:UQG?/GKY,W-AYH:;W#?5?(,QJ]/,5,ADPAVU(P#=Q7/P^3([->(Q:KQ
M-%7A5;^?KR]+CGO4^WB"ZB>;!EKD<*.O\@/)F\#(>YSUCF.9"'HJD[N2`58E
MLXK"J99?VTJY[^A>LVO];*A;I4F&V'E_X9R2@P_6Y(8%[FRV=_O9F'.XTZ<\
MU?S`RGF>'5;S?.3QX4XD.IGCVUUF&S\F;')Q9:XK>TXYKC&ZO+H:3?+6W+':
M5/J=XK%F5^GOG(3^AV7>:;5,/(\9G8Y%Y:[&\6VF93GQN[C_#ZCYIY3\'Y`%
MC1\KGR=4SP\53VG#!?3F=.WVJ$49W;.N2M<O(?9*4A3[B\6W2,Z'SG0AW``1
M2"4L3YEU'BD.I%^*E$J=$I'#\'Z$C6STRJ%TU,>RANQYE8K4\,GN?";S2Z]Z
MNMEALZ4L-"'&=.#<CV5B0+R*D.Y5I80)1Y18?UK,CLS2&1&US?9=A$C>]:L0
M]7+G98BB/^,Z1$ML7HAT"A<B$CAL/:E"G7[I3L%X,1.>'PBXNAF_OOZS(_N`
M2@RP#XP#>.$'TT6*,?F)U6+%IPO1G%^0Q]:),6;.C&A2:?]4WG/T]1&1/'RK
M"S6^;<9.%(9R`'`3MW%!#Q2;-%B$TWLG3E<BJL:W,JJ<P20=(^:D02)FI2J3
MY94O8TKP*D/T,X5-JGU5F"Q:F&,K,D/NJT>T"!Z09[S;`>!R((WB//9<'/-F
M_PR.N*3?W6"VCJZ<CY.1<T7]71U`V^0A/$O;RE$<&RB71&&__%ZJ=&[)65`G
M&\J8K\]8)G7=S4[!HR5WSAU$$[+^4"[%G#$07[.64^@LTJKN&1^K+;-MJV;P
M**^'U'![7!1&$'WA>YB,VS(1-WE2)_RNP[4GK\5H?`9U6O1CH*.#"V.17*Y6
MH#'<A#06X`8LF`9S-\;L5.Y,0G`E'KD+WXW]X`YP'+I=B&7<9/Z_"30.V9$Q
M$7$B59#F/+KD'IBZJ.,KOA:(FN`G+/S%=Q$VFD?RZ>2)(V'>C(ZWE(D):W<"
MV8T;C4?J;([9X8CE*OGFR#?5PO"D$)7"?1>B46&:#(%_LA6X41$"W@Y++SGU
MLS(H$PL#1/$UWZJI,S<?CR1#^29M[3*@DA44&Z!Q/:-XV&+G1:()Q3&1E9='
M@>U=&^T?D(AJ6]D=%"6B"!#9"?P4=&CW^AHM2E9E,%$$!5FI`RFQC@)*(X]7
MVUN(@M431E6Y7MR<*^#?3MQL*=OY*A]2(1L%M,`^'=AG`^H8_?YIH;7LD-S?
M8FP)8ORA[C/IV""+K$[H:J)WR`/B(1'2XU1'?N+P^E5B+)!_3_!3>;X+`_FV
M=S]3$0OS368333DQM\PRYA[M"/4G]7)7I\S"V0&QX^D)@@F_+T6(_+0D(<[*
MQ$W@EW0!+0LL>]#M#;HR37K_)4VD[/Y$X?_-6-F]<>86Z2C\ZX7%9K/R5Z)(
MHF?ZLN>48^`,$?MW`<(W-H(H@>Q'!G`H_^%"I^HZ2*SAB5??&&(_^3K'01!1
M/4[<B*8%XFH0%S6*9(X<'%1>`[46UUDF_E)V)6H7_!!RU^*$0,<F<_J#E*:Z
M2C2[=).H*T?V_]R&18A:*5=(@NQ^1!/ST6T-W#);K0?+LBWZAMGE9FU1]LXA
;W+K3^Q7YQHO");2:MAHZ%/C]!R3)O27D&P``
`
end

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/