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Commit | Line | Data |
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eb847cb1 | 1 | # $Header$ |
2 | ||
6231b320 | 3 | $afsbin="/moira/bin"; |
4 | $vos="$afsbin/vos"; | |
5 | $pts="$afsbin/pts"; | |
6 | $fs="$afsbin/fs"; | |
85584eed | 7 | $zwrite="/usr/athena/bin/zwrite"; |
6231b320 | 8 | |
c09dcc8c | 9 | $afs_data="/moira/afs/afs_data"; |
6231b320 | 10 | $afs_save="$afs_data.tmp"; |
11 | ||
12 | $LOCK_EX=2; | |
13 | $LOCK_UN=8; | |
14 | ||
8a6a9ced | 15 | %vtypes_ATHENA_MIT_EDU = |
16 | ("ACTIVITY", "activity", | |
17 | "APROJ", "aproj", | |
18 | "AREF", "aref", | |
19 | "CONTRIB", "contrib", | |
20 | "COURSE", "course", | |
21 | "HOMEDIR", "user", | |
eb847cb1 | 22 | "LEASE", "dept", |
69aa300a | 23 | "ORG", "org", |
8a6a9ced | 24 | "PROJECT", "project", |
25 | "REF", "ref", | |
26 | "SW", "sw", | |
27 | "SYSTEM", "system", | |
28 | "UROP", "urop", | |
29 | ); | |
30 | ||
6231b320 | 31 | # File format: |
32 | # cell server partition total used alloc | |
33 | ||
34 | # Locking/re-write algorithm: | |
35 | # 1. Open the data file. | |
36 | # 2. Obtain a lock on the data file. | |
37 | # 3. Check for the existence of a temporary data file - die if it exists. | |
38 | # 4. Save current contents into temporary data file. | |
39 | # 5. Re-write output (with line-buffering). | |
40 | # 6. Unlink temporary file. | |
41 | # 7. Unlock data file. | |
42 | # 8. Close the data file. | |
43 | ||
44 | ||
45 | sub afs_lock | |
46 | { | |
47 | open(SRV,"+<$afs_data") || die "Unable to open $afs_data\n"; | |
48 | select((select(SRV), $|=1)[$[]); | |
49 | flock(SRV, $LOCK_EX) || die "Unable to lock $afs_data\n"; | |
f00e5df1 | 50 | die "Temporary status file: $afs_save exists... aborting\n" |
6231b320 | 51 | if (-f $afs_save); |
52 | open(SRV2, ">$afs_save"); | |
53 | @afs_data = <SRV>; | |
54 | print SRV2 @afs_data; | |
55 | close(SRV2); | |
56 | seek(SRV, 0, 0); | |
57 | } | |
58 | ||
59 | sub afs_unlock | |
60 | { | |
61 | unlink($afs_save); | |
62 | close(SRV); | |
63 | } | |
64 | ||
754ef493 | 65 | # Find server/partition for allocation. |
6231b320 | 66 | # |
67 | # Best fit algorithm used: | |
68 | # max[ (2*free space) - (unused quota) ] | |
69 | # = max(2*total - usage - alloc) | |
70 | # | |
9205b505 | 71 | # Note: This routine does not actually adjust the quota; |
72 | # the calling routine should use afs_quota_adj(); | |
754ef493 | 73 | |
6231b320 | 74 | sub afs_find |
75 | { | |
97798f36 | 76 | local($cell,$type,$quota,@except) = @_; |
77 | local($j,$k); | |
a6898212 | 78 | local(@max) = ("", "", -10000000); |
6231b320 | 79 | |
80 | &afs_lock; | |
81 | chop(@afs_data); | |
82 | ||
97798f36 | 83 | sloop: |
754ef493 | 84 | for (@afs_data) { |
85 | local ($a, $asrv, $apart, $t, $total, $used, $alloc) = split(/\s+/,$_); | |
6231b320 | 86 | next if ($a ne $cell || !$total || $type !~ /$t/); |
97798f36 | 87 | for $j (@except) { |
88 | next sloop if ($j eq $asrv); | |
89 | } | |
f00e5df1 | 90 | $alloc = $used if ($alloc < $used); |
6231b320 | 91 | $j = 2*$total - $used - $alloc; |
754ef493 | 92 | @max = ($asrv,$apart,$j) if (! @max || $j > $max[2]); |
6231b320 | 93 | } |
94 | ||
6231b320 | 95 | &afs_unlock; |
96 | return(@max); | |
97 | } | |
98 | ||
754ef493 | 99 | # |
100 | # Quota adjustments | |
101 | # | |
6231b320 | 102 | sub afs_quota_adj |
103 | { | |
9205b505 | 104 | local($cell,$asrv,$apart,$adj,$dusage) = @_; |
5abfab4b | 105 | local($found) = 0; |
6231b320 | 106 | |
107 | &afs_lock; | |
108 | chop(@afs_data); | |
109 | truncate(SRV, 0); | |
110 | for (@afs_data) { | |
111 | local ($c, $as, $ap, $t, $total, $used, $alloc) = split(/\s+/,$_); | |
112 | if ($c eq $cell && $as eq $asrv && $ap eq $apart) { | |
9205b505 | 113 | $dusage = $used unless ($dusage); |
6231b320 | 114 | $alloc += $adj; |
9205b505 | 115 | $_ = join(' ',$c,$asrv,$apart,$t,$total,$dusage,$alloc); |
5abfab4b | 116 | $found = 1; |
6231b320 | 117 | } |
118 | print SRV "$_\n"; | |
119 | } | |
120 | &afs_unlock; | |
5abfab4b | 121 | return($found); |
6231b320 | 122 | } |