[a9fa9b7] | 1 | /* |
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| 2 | * COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org> |
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| 3 | * |
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| 4 | * The license and distribution terms for this file may be |
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| 5 | * found in the file LICENSE in this distribution or at |
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| 6 | * http://www.rtems.com/license/LICENSE. |
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| 7 | */ |
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| 8 | /** |
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| 9 | * @file |
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| 10 | * |
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| 11 | * @ingroup rtems-rfs |
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| 12 | * |
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| 13 | * RTEMS RFS Device Interface. |
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| 14 | * |
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| 15 | * This file contains the set of handlers used to map operations on RFS device |
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| 16 | * nodes onto calls to the RTEMS Classic API IO Manager. |
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| 17 | * |
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| 18 | */ |
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| 19 | |
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[355b0544] | 20 | #if HAVE_CONFIG_H |
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| 21 | #include "config.h" |
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| 22 | #endif |
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| 23 | |
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[03f407b] | 24 | #include <rtems/devfs.h> |
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[a9fa9b7] | 25 | #include "rtems-rfs-rtems.h" |
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| 26 | |
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| 27 | /** |
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| 28 | * This handler maps an open() operation onto rtems_io_open(). |
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| 29 | * |
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| 30 | * @param iop |
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| 31 | * @param pathname |
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| 32 | * @param flag |
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| 33 | * @param mode |
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| 34 | * @return int |
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| 35 | */ |
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| 36 | static int |
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| 37 | rtems_rfs_rtems_device_open ( rtems_libio_t *iop, |
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| 38 | const char *pathname, |
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[3b7c123] | 39 | int oflag, |
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| 40 | mode_t mode) |
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[a9fa9b7] | 41 | { |
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| 42 | rtems_libio_open_close_args_t args; |
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| 43 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (&iop->pathinfo); |
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| 44 | rtems_rfs_ino ino = rtems_rfs_rtems_get_iop_ino (iop); |
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| 45 | rtems_rfs_inode_handle inode; |
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| 46 | int major; |
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| 47 | int minor; |
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| 48 | rtems_status_code status; |
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| 49 | int rc; |
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[66b8047] | 50 | |
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[a9fa9b7] | 51 | rtems_rfs_rtems_lock (fs); |
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[66b8047] | 52 | |
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[a9fa9b7] | 53 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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| 54 | if (rc > 0) |
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| 55 | { |
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| 56 | rtems_rfs_rtems_unlock (fs); |
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| 57 | return rtems_rfs_rtems_error ("device_open: opening inode", rc); |
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| 58 | } |
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| 59 | |
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| 60 | major = rtems_rfs_inode_get_block (&inode, 0); |
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| 61 | minor = rtems_rfs_inode_get_block (&inode, 1); |
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| 62 | |
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| 63 | rc = rtems_rfs_inode_close (fs, &inode); |
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| 64 | if (rc > 0) |
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| 65 | { |
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| 66 | rtems_rfs_rtems_unlock (fs); |
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| 67 | return rtems_rfs_rtems_error ("device_open: closing inode", rc); |
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| 68 | } |
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| 69 | |
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| 70 | rtems_rfs_rtems_unlock (fs); |
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[66b8047] | 71 | |
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[a9fa9b7] | 72 | iop->data0 = major; |
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| 73 | iop->data1 = (void*)((intptr_t) minor); |
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[66b8047] | 74 | |
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[a9fa9b7] | 75 | args.iop = iop; |
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| 76 | args.flags = iop->flags; |
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| 77 | args.mode = mode; |
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| 78 | |
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| 79 | status = rtems_io_open (major, minor, (void *) &args); |
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| 80 | |
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[78f4d6d7] | 81 | return rtems_deviceio_errno (status); |
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[a9fa9b7] | 82 | } |
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| 83 | |
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| 84 | /** |
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| 85 | * This handler maps a close() operation onto rtems_io_close(). |
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| 86 | * |
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| 87 | * @param iop |
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| 88 | * @return int |
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| 89 | */ |
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| 90 | |
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| 91 | static int |
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| 92 | rtems_rfs_rtems_device_close (rtems_libio_t* iop) |
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| 93 | { |
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| 94 | rtems_libio_open_close_args_t args; |
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| 95 | rtems_status_code status; |
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| 96 | int major; |
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| 97 | int minor; |
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| 98 | |
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| 99 | major = (int) iop->data0; |
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| 100 | minor = (intptr_t) iop->data1; |
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| 101 | |
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| 102 | args.iop = iop; |
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| 103 | args.flags = 0; |
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| 104 | args.mode = 0; |
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| 105 | |
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| 106 | status = rtems_io_close (major, minor, (void *) &args); |
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| 107 | |
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[78f4d6d7] | 108 | return rtems_deviceio_errno (status); |
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[a9fa9b7] | 109 | } |
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| 110 | |
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| 111 | /** |
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| 112 | * This handler maps a read() operation onto rtems_io_read(). |
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| 113 | * |
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| 114 | * @param iop |
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| 115 | * @param buffer |
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| 116 | * @param count |
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| 117 | * @return ssize_t |
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| 118 | */ |
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| 119 | |
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| 120 | static ssize_t |
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| 121 | rtems_rfs_rtems_device_read (rtems_libio_t* iop, void* buffer, size_t count) |
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| 122 | { |
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| 123 | rtems_libio_rw_args_t args; |
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| 124 | rtems_status_code status; |
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| 125 | int major; |
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| 126 | int minor; |
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| 127 | |
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| 128 | major = (int) iop->data0; |
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| 129 | minor = (intptr_t) iop->data1; |
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| 130 | |
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| 131 | args.iop = iop; |
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| 132 | args.offset = iop->offset; |
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| 133 | args.buffer = buffer; |
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| 134 | args.count = count; |
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| 135 | args.flags = iop->flags; |
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| 136 | args.bytes_moved = 0; |
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| 137 | |
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| 138 | status = rtems_io_read (major, minor, (void *) &args); |
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| 139 | if (status) |
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| 140 | return rtems_deviceio_errno (status); |
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| 141 | |
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| 142 | return (ssize_t) args.bytes_moved; |
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| 143 | } |
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| 144 | |
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| 145 | /* |
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| 146 | * This handler maps a write() operation onto rtems_io_write(). |
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| 147 | * |
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| 148 | * @param iop |
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| 149 | * @param buffer |
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| 150 | * @param count |
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[66b8047] | 151 | * @return ssize_t |
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[a9fa9b7] | 152 | */ |
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| 153 | |
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| 154 | static ssize_t |
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| 155 | rtems_rfs_rtems_device_write (rtems_libio_t* iop, |
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| 156 | const void* buffer, |
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| 157 | size_t count) |
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| 158 | { |
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| 159 | rtems_libio_rw_args_t args; |
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| 160 | rtems_status_code status; |
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| 161 | int major; |
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| 162 | int minor; |
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| 163 | |
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| 164 | major = (int) iop->data0; |
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| 165 | minor = (intptr_t) iop->data1; |
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| 166 | |
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| 167 | args.iop = iop; |
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| 168 | args.offset = iop->offset; |
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| 169 | args.buffer = (void *) buffer; |
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| 170 | args.count = count; |
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| 171 | args.flags = iop->flags; |
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| 172 | args.bytes_moved = 0; |
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| 173 | |
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| 174 | status = rtems_io_write (major, minor, (void *) &args); |
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| 175 | if (status) |
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| 176 | return rtems_deviceio_errno (status); |
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| 177 | |
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| 178 | return (ssize_t) args.bytes_moved; |
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| 179 | } |
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| 180 | |
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| 181 | /** |
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| 182 | * This handler maps an ioctl() operation onto rtems_io_ioctl(). |
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| 183 | * |
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| 184 | * @param iop |
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| 185 | * @param command |
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| 186 | * @param buffer |
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| 187 | * @return int |
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| 188 | */ |
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| 189 | |
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| 190 | static int |
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| 191 | rtems_rfs_rtems_device_ioctl (rtems_libio_t* iop, |
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| 192 | uint32_t command, |
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| 193 | void* buffer) |
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| 194 | { |
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| 195 | rtems_libio_ioctl_args_t args; |
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| 196 | rtems_status_code status; |
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| 197 | int major; |
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| 198 | int minor; |
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| 199 | |
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| 200 | major = (int) iop->data0; |
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| 201 | minor = (intptr_t) iop->data1; |
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| 202 | |
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| 203 | args.iop = iop; |
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| 204 | args.command = command; |
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| 205 | args.buffer = buffer; |
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| 206 | |
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| 207 | status = rtems_io_control (major, minor, (void *) &args); |
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| 208 | if (status) |
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| 209 | return rtems_deviceio_errno (status); |
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| 210 | |
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| 211 | return args.ioctl_return; |
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| 212 | } |
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| 213 | |
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| 214 | /** |
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| 215 | * The consumes the truncate call. You cannot truncate device files. |
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| 216 | * |
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| 217 | * @param iop |
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| 218 | * @param length |
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| 219 | * @return int |
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| 220 | */ |
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| 221 | |
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| 222 | static int |
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[984c4c49] | 223 | rtems_rfs_rtems_device_ftruncate (rtems_libio_t* iop, off_t length) |
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[a9fa9b7] | 224 | { |
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| 225 | return 0; |
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| 226 | } |
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| 227 | |
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| 228 | /* |
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| 229 | * Handler table for RFS device nodes |
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| 230 | */ |
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| 231 | |
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| 232 | const rtems_filesystem_file_handlers_r rtems_rfs_rtems_device_handlers = { |
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| 233 | .open_h = rtems_rfs_rtems_device_open, |
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| 234 | .close_h = rtems_rfs_rtems_device_close, |
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| 235 | .read_h = rtems_rfs_rtems_device_read, |
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| 236 | .write_h = rtems_rfs_rtems_device_write, |
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| 237 | .ioctl_h = rtems_rfs_rtems_device_ioctl, |
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[30d4124] | 238 | .lseek_h = rtems_filesystem_default_lseek_file, |
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[d0fcd0b] | 239 | .fstat_h = rtems_rfs_rtems_fstat, |
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[a9fa9b7] | 240 | .ftruncate_h = rtems_rfs_rtems_device_ftruncate, |
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[4116fce6] | 241 | .fsync_h = rtems_filesystem_default_fsync_or_fdatasync, |
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| 242 | .fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync, |
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[3b7c123] | 243 | .fcntl_h = rtems_filesystem_default_fcntl |
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[a9fa9b7] | 244 | }; |
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