src/tools/dumpscan/xf_profile.c

   1 /*
   2  * CMUCS AFStools
   3  * dumpscan - routines for scanning and manipulating AFS volume dumps
   4  *
   5  * Copyright (c) 1998 Carnegie Mellon University
   6  * All Rights Reserved.
   7  *
   8  * Permission to use, copy, modify and distribute this software and its
   9  * documentation is hereby granted, provided that both the copyright
  10  * notice and this permission notice appear in all copies of the
  11  * software, derivative works or modified versions, and any portions
  12  * thereof, and that both notices appear in supporting documentation.
  13  *
  14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  16  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  17  *
  18  * Carnegie Mellon requests users of this software to return to
  19  *
  20  *  Software Distribution Coordinator  or  Software_Distribution@CS.CMU.EDU
  21  *  School of Computer Science
  22  *  Carnegie Mellon University
  23  *  Pittsburgh PA 15213-3890
  24  *
  25  * any improvements or extensions that they make and grant Carnegie Mellon
  26  * the rights to redistribute these changes.
  27  */
  28
  29 /* xf_profile.c - XFILE routines for read/write profiling */
  30
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <string.h>
  34 #include <stdlib.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37
  38 #include "xfiles.h"
  39 #include "xf_errs.h"
  40
  41 #define O_MODE_MASK (O_RDONLY | O_WRONLY | O_RDWR)
  42
  43 typedef struct {
  44     XFILE content;
  45     XFILE profile;
  46 } PFILE;
  47
  48
  49 /* do_read for profiled xfiles */
  50 static afs_uint32
  51 xf_PROFILE_do_read(XFILE * X, void *buf, afs_uint32 count)
  52 {
  53     PFILE *PF = X->refcon;
  54     afs_uint32 err;
  55
  56     err = xfread(&PF->content, buf, count);
  57     xfprintf(&PF->profile, "R %ld =%ld\n", (long)count, (long)err);
  58     return err;
  59 }
  60
  61
  62 /* do_write for profiled xfiles */
  63 static afs_uint32
  64 xf_PROFILE_do_write(XFILE * X, void *buf, afs_uint32 count)
  65 {
  66     PFILE *PF = X->refcon;
  67     afs_uint32 err;
  68
  69     err = xfwrite(&PF->content, buf, count);
  70     xfprintf(&PF->profile, "W %ld =%ld\n", (long)count, (long)err);
  71     return err;
  72 }
  73
  74
  75 /* do_tell for profiled xfiles */
  76 static afs_uint32
  77 xf_PROFILE_do_tell(XFILE * X, dt_uint64 * offset)
  78 {
  79     PFILE *PF = X->refcon;
  80     afs_uint32 err;
  81
  82     err = xftell(&PF->content, offset);
  83     if (err)
  84         xfprintf(&PF->profile, "TELL ERR =%ld\n", (long)err);
  85     else
  86         xfprintf(&PF->profile, "TELL %s =0\n", hexify_int64(offset, 0));
  87     return err;
  88 }
  89
  90
  91 /* do_seek for profiled xfiles */
  92 static afs_uint32
  93 xf_PROFILE_do_seek(XFILE * X, dt_uint64 * offset)
  94 {
  95     PFILE *PF = X->refcon;
  96     afs_uint32 err;
  97
  98     err = xfseek(&PF->content, offset);
  99     xfprintf(&PF->profile, "SEEK %s =%ld\n", hexify_int64(offset, 0),
 100              (long)err);
 101     return err;
 102 }
 103
 104
 105 /* do_skip for profiled xfiles */
 106 static afs_uint32
 107 xf_PROFILE_do_skip(XFILE * X, afs_uint32 count)
 108 {
 109     PFILE *PF = X->refcon;
 110     afs_uint32 err;
 111
 112     err = xfskip(&PF->content, count);
 113     xfprintf(&PF->profile, "SKIP %ld =%ld\n", (long)count, (long)err);
 114     return err;
 115 }
 116
 117
 118 /* do_close for profiled xfiles */
 119 static afs_uint32
 120 xf_PROFILE_do_close(XFILE * X)
 121 {
 122     PFILE *PF = X->refcon;
 123     afs_uint32 err, err2;
 124
 125     err = xfclose(&PF->content);
 126     err2 = xfclose(&PF->profile);
 127     free(PF);
 128     return err ? err : err2;
 129 }
 130
 131
 132 /* Open a profiled XFILE */
 133 afs_uint32
 134 xfopen_profile(XFILE * X, int flag, char *xname, char *profile)
 135 {
 136     PFILE *PF;
 137     afs_uint32 err;
 138
 139     PF = calloc(1, sizeof(*PF));
 140     if (!PF)
 141         return ENOMEM;
 142
 143     err = xfopen(&PF->profile, O_RDWR | O_CREAT | O_TRUNC, profile);
 144     if (err) {
 145         free(PF);
 146         return err;
 147     }
 148
 149     err = xfopen(&PF->content, flag, xname);
 150     if (err) {
 151         xfclose(&PF->profile);
 152         free(PF);
 153         return err;
 154     }
 155
 156     memset(X, 0, sizeof(*X));
 157     X->refcon = PF;
 158     X->do_read = xf_PROFILE_do_read;
 159     X->do_write = xf_PROFILE_do_write;
 160     X->do_tell = xf_PROFILE_do_tell;
 161     X->do_close = xf_PROFILE_do_close;
 162     X->is_writable = PF->content.is_writable;
 163     if (PF->content.is_seekable) {
 164         X->is_seekable = 1;
 165         X->do_seek = xf_PROFILE_do_seek;
 166         X->do_skip = xf_PROFILE_do_skip;
 167     }
 168     xfprintf(&PF->profile, "OPEN %s\n", xname);
 169     return 0;
 170 }
 171
 172
 173 afs_uint32
 174 xfon_profile(XFILE * X, int flag, char *name)
 175 {
 176     char *x, *profile, *xname;
 177     afs_uint32 err;
 178
 179     if (!(name = strdup(name)))
 180         return ENOMEM;
 181
 182     profile = "-";
 183     xname = name;
 184     for (x = name; *x; x++) {
 185         if (x[0] == ':' && x[1] == ':') {
 186             *x = 0;
 187             profile = name;
 188             xname = x + 2;
 189             break;
 190         }
 191     }
 192     if (!*name)
 193         profile = "-";
 194     err = xfopen_profile(X, flag, xname, profile);
 195     free(name);
 196     return err;
 197 }