1 | /* |
---|
2 | * IMFS Device Node Handlers |
---|
3 | * |
---|
4 | * This file contains the set of handlers used to map operations on |
---|
5 | * IMFS device nodes onto calls to the RTEMS Classic API IO Manager. |
---|
6 | * |
---|
7 | * COPYRIGHT (c) 1989-2008. |
---|
8 | * On-Line Applications Research Corporation (OAR). |
---|
9 | * |
---|
10 | * The license and distribution terms for this file may be |
---|
11 | * found in the file LICENSE in this distribution or at |
---|
12 | * http://www.rtems.com/license/LICENSE. |
---|
13 | */ |
---|
14 | |
---|
15 | #if HAVE_CONFIG_H |
---|
16 | #include "config.h" |
---|
17 | #endif |
---|
18 | |
---|
19 | #include "imfs.h" |
---|
20 | |
---|
21 | #include <rtems/devfs.h> |
---|
22 | |
---|
23 | /* |
---|
24 | * device_open |
---|
25 | * |
---|
26 | * This handler maps an open() operation onto rtems_io_open(). |
---|
27 | */ |
---|
28 | |
---|
29 | int device_open( |
---|
30 | rtems_libio_t *iop, |
---|
31 | const char *pathname, |
---|
32 | int oflag, |
---|
33 | mode_t mode |
---|
34 | ) |
---|
35 | { |
---|
36 | rtems_libio_open_close_args_t args; |
---|
37 | rtems_status_code status; |
---|
38 | IMFS_jnode_t *the_jnode; |
---|
39 | |
---|
40 | the_jnode = iop->pathinfo.node_access; |
---|
41 | |
---|
42 | args.iop = iop; |
---|
43 | args.flags = iop->flags; |
---|
44 | args.mode = mode; |
---|
45 | |
---|
46 | status = rtems_io_open( |
---|
47 | the_jnode->info.device.major, |
---|
48 | the_jnode->info.device.minor, |
---|
49 | (void *) &args |
---|
50 | ); |
---|
51 | |
---|
52 | return rtems_deviceio_errno( status ); |
---|
53 | } |
---|
54 | |
---|
55 | /* |
---|
56 | * device_close |
---|
57 | * |
---|
58 | * This handler maps a close() operation onto rtems_io_close(). |
---|
59 | */ |
---|
60 | |
---|
61 | int device_close( |
---|
62 | rtems_libio_t *iop |
---|
63 | ) |
---|
64 | { |
---|
65 | rtems_libio_open_close_args_t args; |
---|
66 | rtems_status_code status; |
---|
67 | IMFS_jnode_t *the_jnode; |
---|
68 | |
---|
69 | the_jnode = iop->pathinfo.node_access; |
---|
70 | |
---|
71 | args.iop = iop; |
---|
72 | args.flags = 0; |
---|
73 | args.mode = 0; |
---|
74 | |
---|
75 | status = rtems_io_close( |
---|
76 | the_jnode->info.device.major, |
---|
77 | the_jnode->info.device.minor, |
---|
78 | (void *) &args |
---|
79 | ); |
---|
80 | |
---|
81 | return rtems_deviceio_errno( status ); |
---|
82 | } |
---|
83 | |
---|
84 | /* |
---|
85 | * device_read |
---|
86 | * |
---|
87 | * This handler maps a read() operation onto rtems_io_read(). |
---|
88 | */ |
---|
89 | |
---|
90 | ssize_t device_read( |
---|
91 | rtems_libio_t *iop, |
---|
92 | void *buffer, |
---|
93 | size_t count |
---|
94 | ) |
---|
95 | { |
---|
96 | rtems_libio_rw_args_t args; |
---|
97 | rtems_status_code status; |
---|
98 | IMFS_jnode_t *the_jnode; |
---|
99 | |
---|
100 | the_jnode = iop->pathinfo.node_access; |
---|
101 | |
---|
102 | args.iop = iop; |
---|
103 | args.offset = iop->offset; |
---|
104 | args.buffer = buffer; |
---|
105 | args.count = count; |
---|
106 | args.flags = iop->flags; |
---|
107 | args.bytes_moved = 0; |
---|
108 | |
---|
109 | status = rtems_io_read( |
---|
110 | the_jnode->info.device.major, |
---|
111 | the_jnode->info.device.minor, |
---|
112 | (void *) &args |
---|
113 | ); |
---|
114 | |
---|
115 | if ( status ) |
---|
116 | return rtems_deviceio_errno(status); |
---|
117 | |
---|
118 | return (ssize_t) args.bytes_moved; |
---|
119 | } |
---|
120 | |
---|
121 | /* |
---|
122 | * device_write |
---|
123 | * |
---|
124 | * This handler maps a write() operation onto rtems_io_write(). |
---|
125 | */ |
---|
126 | |
---|
127 | ssize_t device_write( |
---|
128 | rtems_libio_t *iop, |
---|
129 | const void *buffer, |
---|
130 | size_t count |
---|
131 | ) |
---|
132 | { |
---|
133 | rtems_libio_rw_args_t args; |
---|
134 | rtems_status_code status; |
---|
135 | IMFS_jnode_t *the_jnode; |
---|
136 | |
---|
137 | the_jnode = iop->pathinfo.node_access; |
---|
138 | |
---|
139 | args.iop = iop; |
---|
140 | args.offset = iop->offset; |
---|
141 | args.buffer = (void *) buffer; |
---|
142 | args.count = count; |
---|
143 | args.flags = iop->flags; |
---|
144 | args.bytes_moved = 0; |
---|
145 | |
---|
146 | status = rtems_io_write( |
---|
147 | the_jnode->info.device.major, |
---|
148 | the_jnode->info.device.minor, |
---|
149 | (void *) &args |
---|
150 | ); |
---|
151 | |
---|
152 | if ( status ) |
---|
153 | return rtems_deviceio_errno(status); |
---|
154 | |
---|
155 | return (ssize_t) args.bytes_moved; |
---|
156 | } |
---|
157 | |
---|
158 | /* |
---|
159 | * device_ioctl |
---|
160 | * |
---|
161 | * This handler maps an ioctl() operation onto rtems_io_ioctl(). |
---|
162 | */ |
---|
163 | |
---|
164 | int device_ioctl( |
---|
165 | rtems_libio_t *iop, |
---|
166 | uint32_t command, |
---|
167 | void *buffer |
---|
168 | ) |
---|
169 | { |
---|
170 | rtems_libio_ioctl_args_t args; |
---|
171 | rtems_status_code status; |
---|
172 | IMFS_jnode_t *the_jnode; |
---|
173 | |
---|
174 | args.iop = iop; |
---|
175 | args.command = command; |
---|
176 | args.buffer = buffer; |
---|
177 | |
---|
178 | the_jnode = iop->pathinfo.node_access; |
---|
179 | |
---|
180 | status = rtems_io_control( |
---|
181 | the_jnode->info.device.major, |
---|
182 | the_jnode->info.device.minor, |
---|
183 | (void *) &args |
---|
184 | ); |
---|
185 | |
---|
186 | if ( status ) |
---|
187 | return rtems_deviceio_errno(status); |
---|
188 | |
---|
189 | return args.ioctl_return; |
---|
190 | } |
---|
191 | |
---|
192 | /* |
---|
193 | * device_stat |
---|
194 | * |
---|
195 | * The IMFS_stat() is used. |
---|
196 | */ |
---|
197 | |
---|
198 | /* |
---|
199 | * device_rmnod |
---|
200 | * |
---|
201 | * The IMFS_rmnod() is used. |
---|
202 | */ |
---|
203 | |
---|
204 | int device_ftruncate( |
---|
205 | rtems_libio_t *iop, |
---|
206 | off_t length |
---|
207 | ) |
---|
208 | { |
---|
209 | return 0; |
---|
210 | } |
---|