FreeCalypso > hg > freecalypso-tools
annotate ffstools/tiffs-rd/inode.c @ 619:f82551c77e58
libserial-newlnx: ASYNC_LOW_LATENCY patch reverted
Reports from Das Signal indicate that loadtools performance on Debian
is about the same as on Slackware, and that including or omitting the
ASYNC_LOW_LATENCY patch from Serg makes no difference. Because the
patch in question does not appear to be necessary, it is being reverted
until and unless someone other than Serg reports an actual real-world
system on which loadtools operation times are slowed compared to the
Mother's Slackware reference and on which Slackware-like performance
can be restored by setting the ASYNC_LOW_LATENCY flag.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 27 Feb 2020 01:09:48 +0000 |
parents | e7502631a0f9 |
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rev | line source |
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0
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1 /* |
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2 * This C module implements the reading and decoding of inode information. |
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3 */ |
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4 |
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5 #include <sys/types.h> |
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6 #include <endian.h> |
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7 #include <stdio.h> |
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8 #include <stdlib.h> |
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9 #include <string.h> |
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10 #include <strings.h> |
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11 #include "types.h" |
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12 #include "struct.h" |
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13 #include "globals.h" |
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14 |
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15 u8 blank_flash_line[16] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
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16 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; |
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17 |
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18 alloc_inode_table() |
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19 { |
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20 inode_info = malloc(sizeof(struct inode_info *) * inode_limit); |
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21 if (!inode_info) { |
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22 perror("malloc of inode table"); |
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23 exit(1); |
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24 } |
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25 bzero(inode_info, sizeof(struct inode_info *) * inode_limit); |
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26 } |
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27 |
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28 static int |
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29 convert_ptr(in, infp) |
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30 int in; |
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31 int *infp; |
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32 { |
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33 if (in == 0xFFFF) { |
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34 *infp = 0; |
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35 return(0); |
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36 } |
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37 if (in < 1 || in >= inode_limit) |
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38 return(-1); |
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39 *infp = in; |
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40 return(1); |
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41 } |
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42 |
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43 validate_inode(ino) |
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44 { |
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45 struct inode_flash *fl; |
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46 struct inode_info *inf; |
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47 |
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48 if (ino < 1 || ino >= inode_limit) |
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49 return(0); |
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50 if (inode_info[ino]) |
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51 return(1); |
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52 fl = (struct inode_flash *)inode_block + ino; |
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53 if (!bcmp(fl, blank_flash_line, sizeof blank_flash_line)) |
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54 return(0); |
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55 inf = malloc(sizeof(struct inode_info)); |
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56 if (!inf) { |
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57 perror("malloc of struct inode_info"); |
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58 exit(1); |
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59 } |
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60 bzero(inf, sizeof(struct inode_info)); |
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61 inf->ino = ino; |
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62 inf->len = le16toh(fl->len); |
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63 if (inf->len & 0xF) { |
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64 fprintf(stderr, |
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65 "warning: inode #%x: invalid length, skipping\n", ino); |
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66 free(inf); |
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67 return(0); |
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68 } |
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69 inf->type = fl->type; |
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70 switch (inf->type) { |
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71 case 0x00: |
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72 break; |
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73 case 0xE1: |
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74 case 0xF1: |
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75 case 0xF2: |
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76 case 0xF3: |
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77 case 0xF4: |
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78 if (!inf->len) { |
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79 fprintf(stderr, |
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80 "warning: inode #%x: non-deleted object has zero length, skipping\n", |
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81 ino); |
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82 free(inf); |
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83 return(0); |
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84 } |
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85 break; |
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86 default: |
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87 fprintf(stderr, |
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88 "warning: inode #%x: unexpected object type %02X, skipping\n", |
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89 ino, inf->type); |
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90 free(inf); |
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91 return(0); |
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92 } |
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93 if (convert_ptr(le16toh(fl->descend), &inf->descend) < 0) { |
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94 fprintf(stderr, |
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95 "warning: inode #%x: invalid descend pointer, skipping\n", |
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96 ino); |
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97 free(inf); |
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98 return(0); |
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99 } |
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100 if (convert_ptr(le16toh(fl->sibling), &inf->sibling) < 0) { |
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101 fprintf(stderr, |
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102 "warning: inode #%x: invalid sibling pointer, skipping\n", |
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103 ino); |
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104 free(inf); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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105 return(0); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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106 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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107 if (inf->len) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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108 inf->rawloc = le32toh(fl->dataptr); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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109 if (old_16bit_location) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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110 inf->rawloc >>= 16; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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111 if (inf->rawloc > 0x0FFFFFFF) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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112 invdptr: fprintf(stderr, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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113 "warning: inode #%x: invalid data pointer, skipping\n", |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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114 ino); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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115 free(inf); |
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Mychaela Falconia <falcon@freecalypso.org>
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116 return(0); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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117 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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118 inf->offset = inf->rawloc << 4; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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119 if (inf->offset >= total_ffs_size) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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120 goto invdptr; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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121 if (inf->offset + inf->len > total_ffs_size) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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122 fprintf(stderr, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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123 "warning: inode #%x: data pointer + length > FFS total size, skipping\n", |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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124 ino); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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125 free(inf); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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126 return(0); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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127 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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128 inf->dataptr = image + inf->offset; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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129 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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130 inode_info[ino] = inf; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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131 return(1); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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132 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
133 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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134 find_root_inode() |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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135 { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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136 int ino; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
137 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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138 if (root_inode) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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139 if (!validate_inode(root_inode)) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
140 fprintf(stderr, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
141 "error: root inode specified with -r is invalid\n"); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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142 exit(1); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
143 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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144 return(1); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
145 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
146 for (ino = 1; ino < inode_limit; ino++) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
147 if (!validate_inode(ino)) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
148 continue; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
149 if (inode_info[ino]->type != 0xF2) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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150 continue; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
151 if (*inode_info[ino]->dataptr != '/') |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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152 continue; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
153 root_inode = ino; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
154 if (verbose) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
155 fprintf(stderr, "Found root inode at #%x\n", ino); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
156 if (inode_info[ino]->sibling) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
157 fprintf(stderr, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
158 "warning: root inode #%x has a non-null sibling pointer\n", |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
159 ino); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
160 return(0); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
161 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
162 fprintf(stderr, "error: no root inode found; try -r\n"); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
163 exit(1); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
164 } |