1 | /*************************************************************************** |
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2 | * |
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3 | * Copyright (C) 2001 International Business Machines |
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4 | * All rights reserved. |
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5 | * |
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6 | * This file is part of the GPFS mmfslinux kernel module. |
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7 | * |
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8 | * Redistribution and use in source and binary forms, with or without |
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9 | * modification, are permitted provided that the following conditions |
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10 | * are met: |
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11 | * |
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12 | * 1. Redistributions of source code must retain the above copyright notice, |
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13 | * this list of conditions and the following disclaimer. |
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14 | * 2. Redistributions in binary form must reproduce the above copyright |
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15 | * notice, this list of conditions and the following disclaimer in the |
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16 | * documentation and/or other materials provided with the distribution. |
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17 | * 3. The name of the author may not be used to endorse or promote products |
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18 | * derived from this software without specific prior written |
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19 | * permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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22 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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23 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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24 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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27 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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28 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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29 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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30 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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31 | * |
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32 | *************************************************************************** */ |
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33 | /* @(#)78 1.2 src/avs/fs/mmfs/ts/kernext/gpl-linux/tscalls.c, mmfs, avs_rgpfs24, rgpfs24s007a 10/27/06 16:48:13 */ |
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34 | /* |
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35 | * Portability layer equivalent of ts/util/tscalls.c |
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36 | * Includes a subset of the libgpfs interfaces that GPFS has provided |
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37 | * in open-source form. |
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38 | * |
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39 | * Contents: |
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40 | * gpfs_getacl |
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41 | * gpfs_putacl |
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42 | * gpfs_set_share |
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43 | * gpfs_set_lease |
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44 | * gpfs_get_lease |
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45 | */ |
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46 | |
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47 | #include <stdlib.h> |
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48 | #include <sys/errno.h> |
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49 | #include <sys/ioctl.h> |
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50 | |
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51 | #include <fcntl.h> |
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52 | #define F_SETLEASE 1024 |
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53 | #define F_GETLEASE 1025 |
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54 | |
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55 | #include <cxiSystem.h> |
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56 | #include <gpfs_gpl.h> /* open-source segment of gpfs.h */ |
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57 | #include <cxiTSFattr.h> |
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58 | |
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59 | #define IOCTL_FATTR 53 |
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60 | #define IOCTL_GETACL 56 |
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61 | #define IOCTL_PUTACL 57 |
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62 | #define IOCTL_SHARE 112 |
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63 | #define IOCTL_LEASE 113 |
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64 | |
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65 | struct ioArgs |
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66 | { |
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67 | long arg1; |
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68 | long arg2; |
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69 | long arg3; |
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70 | long arg4; |
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71 | long arg5; |
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72 | }; |
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73 | |
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74 | /*------------------------------------------------------------------------- |
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75 | * NAME: gpfs_getacl |
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76 | * |
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77 | * FUNCTION: Interface to read GPFS ACLs |
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78 | * |
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79 | * Returns: 0 Successful |
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80 | * -1 Failure |
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81 | * |
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82 | * Errno: ENOSYS function not available |
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83 | *-------------------------------------------------------------------------*/ |
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84 | int |
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85 | gpfs_getacl(char *pathname, |
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86 | int flags, |
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87 | void *aclP) |
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88 | { |
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89 | int rc; |
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90 | int fd; |
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91 | struct ioArgs io; |
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92 | |
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93 | fd = open(GPFS_DEVNAME, O_RDONLY); |
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94 | if (fd < 0) |
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95 | { |
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96 | rc = -1; |
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97 | errno = ENOSYS; |
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98 | goto xerror; |
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99 | } |
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100 | |
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101 | /* Retrieve the ACL from GPFS */ |
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102 | io.arg1 = (long)pathname; |
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103 | io.arg2 = (long)flags; |
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104 | io.arg3 = (long)aclP; |
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105 | |
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106 | rc = ioctl(fd, IOCTL_GETACL, &io); |
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107 | |
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108 | xerror: |
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109 | if (fd >= 0) |
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110 | close(fd); |
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111 | |
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112 | return rc; |
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113 | } |
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114 | |
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115 | |
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116 | /*------------------------------------------------------------------------- |
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117 | * NAME: gpfs_putacl |
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118 | * |
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119 | * FUNCTION: Interface to store GPFS ACLs |
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120 | * |
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121 | * Returns: 0 Successful |
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122 | * -1 Failure |
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123 | * |
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124 | * Errno: ENOSYS function not available |
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125 | *-------------------------------------------------------------------------*/ |
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126 | int |
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127 | gpfs_putacl(char *pathname, |
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128 | int flags, |
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129 | void *aclP) |
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130 | { |
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131 | int rc; |
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132 | int fd; |
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133 | struct ioArgs io; |
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134 | |
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135 | fd = open(GPFS_DEVNAME, O_RDONLY); |
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136 | if (fd < 0) |
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137 | { |
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138 | rc = -1; |
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139 | errno = ENOSYS; |
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140 | goto xerror; |
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141 | } |
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142 | |
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143 | /* Store the ACL into GPFS */ |
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144 | io.arg1 = (long)pathname; |
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145 | io.arg2 = (long)flags; |
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146 | io.arg3 = (long)aclP; |
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147 | |
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148 | rc = ioctl(fd, IOCTL_PUTACL, &io); |
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149 | |
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150 | xerror: |
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151 | if (fd >= 0) |
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152 | close(fd); |
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153 | |
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154 | return rc; |
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155 | } |
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156 | |
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157 | |
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158 | /*------------------------------------------------------------------------- |
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159 | * NAME: gpfs_set_share |
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160 | * |
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161 | * FUNCTION: Samba interface to GPFS OpenLks |
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162 | * Called from the Samba daemon to reserve a share |
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163 | * |
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164 | * INPUT: object_fd : file descriptor of the object to share |
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165 | * share: modes being requested |
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166 | * deny : modes to deny |
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167 | * OUTPUT: None |
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168 | * |
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169 | * Returns: 0 Successful |
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170 | * -1 Failure |
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171 | * Errno: ENOENT File not found |
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172 | * EACCES Share mode not granted |
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173 | *-------------------------------------------------------------------------*/ |
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174 | int gpfs_set_share(int object_fd, |
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175 | unsigned int share, |
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176 | unsigned int deny) |
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177 | { |
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178 | int rc; |
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179 | int fd; |
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180 | struct ioArgs io; |
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181 | |
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182 | fd = open(GPFS_DEVNAME, O_RDONLY); |
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183 | if (fd < 0) |
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184 | { |
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185 | rc = -1; |
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186 | errno = ENOSYS; |
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187 | goto xerror; |
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188 | } |
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189 | |
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190 | /* Request the share from GPFS */ |
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191 | io.arg1 = (long)object_fd; |
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192 | io.arg2 = (long)share; |
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193 | io.arg3 = (long)deny; |
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194 | |
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195 | rc = ioctl(fd, IOCTL_SHARE, &io); |
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196 | |
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197 | xerror: |
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198 | if (fd >= 0) |
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199 | close(fd); |
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200 | |
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201 | return rc; |
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202 | } |
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203 | |
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204 | /*------------------------------------------------------------------------- |
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205 | * NAME: gpfs_set_lease |
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206 | * |
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207 | * FUNCTION: Samba interface to GPFS OpLks |
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208 | * Called from the Samba daemon to obtain a lease |
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209 | * |
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210 | * INPUT: object_fd : file descriptor of the object to lease |
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211 | * leaseType: mode being requested |
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212 | * OUTPUT: None |
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213 | * |
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214 | * Returns: 0 Successful |
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215 | * -1 Failure |
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216 | * Errno: EACCES Lease not granted |
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217 | * ENOENT File not found |
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218 | *-------------------------------------------------------------------------*/ |
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219 | int gpfs_set_lease(int object_fd, |
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220 | unsigned int leaseType) |
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221 | { |
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222 | int rc = 0; |
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223 | int fd; |
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224 | int lrc, serrno; |
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225 | struct ioArgs io; |
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226 | |
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227 | fd = open(GPFS_DEVNAME, O_RDONLY); |
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228 | if (fd < 0) |
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229 | { |
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230 | rc = -1; |
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231 | errno = ENOSYS; |
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232 | goto xerror; |
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233 | } |
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234 | |
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235 | /* Queue Linux structures required for break notification */ |
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236 | rc = CXI_REGISTER_LEASE(object_fd, leaseType); |
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237 | if (rc) |
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238 | return rc; |
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239 | |
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240 | /* Request the lease from GPFS */ |
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241 | io.arg1 = (long)object_fd; |
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242 | io.arg2 = (long)leaseType; |
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243 | io.arg3 = (long)NULL; |
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244 | io.arg4 = (long)NULL; |
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245 | |
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246 | rc = ioctl(fd, IOCTL_LEASE, &io); |
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247 | |
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248 | if (rc && (leaseType != GPFS_LEASE_NONE)) |
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249 | { |
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250 | serrno = errno; |
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251 | |
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252 | /* Dequeue Linux structures */ |
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253 | lrc = CXI_REGISTER_LEASE(object_fd, GPFS_LEASE_NONE); |
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254 | |
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255 | errno = serrno; |
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256 | } |
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257 | |
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258 | xerror: |
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259 | if (fd >= 0) |
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260 | close(fd); |
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261 | |
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262 | return rc; |
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263 | } |
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264 | |
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265 | |
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266 | /*------------------------------------------------------------------------- |
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267 | * NAME: gpfs_get_lease |
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268 | * |
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269 | * FUNCTION: Samba interface to GPFS OpLks |
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270 | * Called from the Samba daemon to query leases held |
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271 | * |
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272 | * INPUT: object_fd : file descriptor of the leased object |
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273 | * OUTPUT: None |
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274 | * |
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275 | * Returns: GPFS_LEASE_READ |
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276 | * GPFS_LEASE_WRITE |
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277 | * GPFS_LEASE_NONE |
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278 | * -1 Failure |
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279 | * |
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280 | * Errno: ENOENT File not found |
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281 | * EINVAL |
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282 | *-------------------------------------------------------------------------*/ |
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283 | int gpfs_get_lease(int object_fd) |
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284 | { |
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285 | int rc = 0; |
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286 | |
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287 | CXI_GET_LEASE_HELD(object_fd, rc); |
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288 | |
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289 | if (rc<0) |
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290 | { |
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291 | errno = -rc; |
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292 | rc = -1; |
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293 | } |
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294 | return rc; |
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295 | } |
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296 | |
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297 | /*------------------------------------------------------------------------- |
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298 | * NAME: gpfs_prealloc() |
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299 | * Preallocate disk storage for the file handle that has |
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300 | * already been opened for writing, starting at the specified |
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301 | * starting offset and covering at least the number of bytes |
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302 | * requested. Allocations are rounded to block boundaries |
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303 | * (block size can be found using fstat() in st_blksize.) |
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304 | * Any existing data already in the file will not be modified. |
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305 | * Any read of the preallocated blocks will return zeros. |
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306 | * |
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307 | * FUNCTION: |
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308 | * Returns: 0 Successful |
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309 | * -1 Failure |
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310 | * |
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311 | * Errno: ENOSYS No prealloc service available |
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312 | * EBADF Bad file handle |
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313 | * EINVAL Not a GPFS file |
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314 | * EINVAL Not a regular file |
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315 | * EINVAL StartOffset or BytesToPrealloc < 0 |
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316 | * EACCES File not opened for writing |
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317 | * EDQUOT Quota exceeded |
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318 | * ENOSPC Not enough space on disk |
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319 | *-------------------------------------------------------------------------*/ |
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320 | int |
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321 | gpfs_prealloc(int FileHandle, gpfs_off64_t StartOffset, |
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322 | gpfs_off64_t BytesToTransfer) |
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323 | { |
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324 | int rc; |
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325 | int fd; |
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326 | struct ioArgs io; |
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327 | struct filePreallocation preAlloc = {0,0,0}; |
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328 | |
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329 | fd = open(GPFS_DEVNAME, O_RDONLY); |
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330 | if (fd < 0) |
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331 | { |
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332 | rc = -1; |
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333 | errno = ENOSYS; |
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334 | goto xerror; |
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335 | } |
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336 | |
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337 | /* Construct the filePreallocation structure */ |
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338 | preAlloc.size = BytesToTransfer; |
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339 | preAlloc.offset = StartOffset; |
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340 | preAlloc.flags = 0; |
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341 | |
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342 | /* Store the ACL into GPFS */ |
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343 | io.arg1 = (long)FileHandle; |
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344 | io.arg2 = (long)PREALLOCATE_FILE; |
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345 | io.arg3 = (long)&preAlloc; |
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346 | io.arg4 = (long)NULL; |
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347 | |
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348 | rc = ioctl(fd, IOCTL_FATTR, &io); |
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349 | |
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350 | xerror: |
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351 | if (fd >= 0) |
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352 | close(fd); |
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353 | |
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354 | return rc; |
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355 | } /* --------- end of gpfs_prealloc() -------------- */ |
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356 | |
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357 | |
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