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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Jakub Jermar |
2 | * Copyright (c) 2009 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
Line 40... | Line 40... | ||
40 | #include <async.h> |
40 | #include <async.h> |
41 | #include <ipc/ipc.h> |
41 | #include <ipc/ipc.h> |
42 | #include <as.h> |
42 | #include <as.h> |
43 | #include <assert.h> |
43 | #include <assert.h> |
44 | #include <dirent.h> |
44 | #include <dirent.h> |
- | 45 | #include <mem.h> |
|
- | 46 | #include <sys/stat.h> |
|
45 | 47 | ||
46 | /** Register file system server. |
48 | /** Register file system server. |
47 | * |
49 | * |
48 | * This function abstracts away the tedious registration protocol from |
50 | * This function abstracts away the tedious registration protocol from |
49 | * file system implementations and lets them to reuse this registration glue |
51 | * file system implementations and lets them to reuse this registration glue |
Line 66... | Line 68... | ||
66 | * Tell VFS that we are here and want to get registered. |
68 | * Tell VFS that we are here and want to get registered. |
67 | * We use the async framework because VFS will answer the request |
69 | * We use the async framework because VFS will answer the request |
68 | * out-of-order, when it knows that the operation succeeded or failed. |
70 | * out-of-order, when it knows that the operation succeeded or failed. |
69 | */ |
71 | */ |
70 | ipc_call_t answer; |
72 | ipc_call_t answer; |
71 | aid_t req = async_send_0(vfs_phone, VFS_REGISTER, &answer); |
73 | aid_t req = async_send_0(vfs_phone, VFS_IN_REGISTER, &answer); |
72 | 74 | ||
73 | /* |
75 | /* |
74 | * Send our VFS info structure to VFS. |
76 | * Send our VFS info structure to VFS. |
75 | */ |
77 | */ |
76 | int rc = ipc_data_write_start(vfs_phone, info, sizeof(*info)); |
78 | int rc = ipc_data_write_start(vfs_phone, info, sizeof(*info)); |
Line 101... | Line 103... | ||
101 | async_wait_for(req, NULL); |
103 | async_wait_for(req, NULL); |
102 | return rc; |
104 | return rc; |
103 | } |
105 | } |
104 | 106 | ||
105 | /* |
107 | /* |
106 | * Pick up the answer for the request to the VFS_REQUEST call. |
108 | * Pick up the answer for the request to the VFS_IN_REQUEST call. |
107 | */ |
109 | */ |
108 | async_wait_for(req, NULL); |
110 | async_wait_for(req, NULL); |
109 | reg->fs_handle = (int) IPC_GET_ARG1(answer); |
111 | reg->fs_handle = (int) IPC_GET_ARG1(answer); |
110 | 112 | ||
111 | /* |
113 | /* |
Line 120... | Line 122... | ||
120 | async_set_client_connection(conn); |
122 | async_set_client_connection(conn); |
121 | 123 | ||
122 | return IPC_GET_RETVAL(answer); |
124 | return IPC_GET_RETVAL(answer); |
123 | } |
125 | } |
124 | 126 | ||
- | 127 | void fs_node_initialize(fs_node_t *fn) |
|
- | 128 | { |
|
- | 129 | memset(fn, 0, sizeof(fs_node_t)); |
|
- | 130 | } |
|
- | 131 | ||
- | 132 | void libfs_mount(libfs_ops_t *ops, fs_handle_t fs_handle, ipc_callid_t rid, |
|
- | 133 | ipc_call_t *request) |
|
- | 134 | { |
|
- | 135 | dev_handle_t mp_dev_handle = (dev_handle_t) IPC_GET_ARG1(*request); |
|
- | 136 | fs_index_t mp_fs_index = (fs_index_t) IPC_GET_ARG2(*request); |
|
- | 137 | fs_handle_t mr_fs_handle = (fs_handle_t) IPC_GET_ARG3(*request); |
|
- | 138 | dev_handle_t mr_dev_handle = (dev_handle_t) IPC_GET_ARG4(*request); |
|
- | 139 | int res; |
|
- | 140 | ipcarg_t rc; |
|
- | 141 | ||
- | 142 | ipc_call_t call; |
|
- | 143 | ipc_callid_t callid; |
|
- | 144 | ||
- | 145 | /* accept the phone */ |
|
- | 146 | callid = async_get_call(&call); |
|
- | 147 | int mountee_phone = (int)IPC_GET_ARG1(call); |
|
- | 148 | if ((IPC_GET_METHOD(call) != IPC_M_CONNECTION_CLONE) || |
|
- | 149 | mountee_phone < 0) { |
|
- | 150 | ipc_answer_0(callid, EINVAL); |
|
- | 151 | ipc_answer_0(rid, EINVAL); |
|
- | 152 | return; |
|
- | 153 | } |
|
- | 154 | ipc_answer_0(callid, EOK); /* acknowledge the mountee_phone */ |
|
- | 155 | ||
- | 156 | res = ipc_data_write_receive(&callid, NULL); |
|
- | 157 | if (!res) { |
|
- | 158 | ipc_hangup(mountee_phone); |
|
- | 159 | ipc_answer_0(callid, EINVAL); |
|
- | 160 | ipc_answer_0(rid, EINVAL); |
|
- | 161 | return; |
|
- | 162 | } |
|
- | 163 | ||
- | 164 | fs_node_t *fn = ops->node_get(mp_dev_handle, mp_fs_index); |
|
- | 165 | if (!fn) { |
|
- | 166 | ipc_hangup(mountee_phone); |
|
- | 167 | ipc_answer_0(callid, ENOENT); |
|
- | 168 | ipc_answer_0(rid, ENOENT); |
|
- | 169 | return; |
|
- | 170 | } |
|
- | 171 | ||
- | 172 | if (fn->mp_data.mp_active) { |
|
- | 173 | ipc_hangup(mountee_phone); |
|
- | 174 | ops->node_put(fn); |
|
- | 175 | ipc_answer_0(callid, EBUSY); |
|
- | 176 | ipc_answer_0(rid, EBUSY); |
|
- | 177 | return; |
|
- | 178 | } |
|
- | 179 | ||
- | 180 | rc = async_req_0_0(mountee_phone, IPC_M_CONNECT_ME); |
|
- | 181 | if (rc != 0) { |
|
- | 182 | ipc_hangup(mountee_phone); |
|
- | 183 | ops->node_put(fn); |
|
- | 184 | ipc_answer_0(callid, rc); |
|
- | 185 | ipc_answer_0(rid, rc); |
|
- | 186 | return; |
|
- | 187 | } |
|
- | 188 | ||
- | 189 | ipc_call_t answer; |
|
- | 190 | aid_t msg = async_send_1(mountee_phone, VFS_OUT_MOUNTED, mr_dev_handle, |
|
- | 191 | &answer); |
|
- | 192 | ipc_forward_fast(callid, mountee_phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME); |
|
- | 193 | async_wait_for(msg, &rc); |
|
- | 194 | ||
- | 195 | if (rc == EOK) { |
|
- | 196 | fn->mp_data.mp_active = true; |
|
- | 197 | fn->mp_data.fs_handle = mr_fs_handle; |
|
- | 198 | fn->mp_data.dev_handle = mr_dev_handle; |
|
- | 199 | fn->mp_data.phone = mountee_phone; |
|
- | 200 | } |
|
- | 201 | /* |
|
- | 202 | * Do not release the FS node so that it stays in memory. |
|
- | 203 | */ |
|
- | 204 | ipc_answer_3(rid, rc, IPC_GET_ARG1(answer), IPC_GET_ARG2(answer), |
|
- | 205 | IPC_GET_ARG3(answer)); |
|
- | 206 | } |
|
- | 207 | ||
125 | /** Lookup VFS triplet by name in the file system name space. |
208 | /** Lookup VFS triplet by name in the file system name space. |
126 | * |
209 | * |
127 | * The path passed in the PLB must be in the canonical file system path format |
210 | * The path passed in the PLB must be in the canonical file system path format |
128 | * as returned by the canonify() function. |
211 | * as returned by the canonify() function. |
129 | * |
212 | * |
130 | * @param ops libfs operations structure with function pointers to |
213 | * @param ops libfs operations structure with function pointers to |
131 | * file system implementation |
214 | * file system implementation |
132 | * @param fs_handle File system handle of the file system where to perform |
215 | * @param fs_handle File system handle of the file system where to perform |
133 | * the lookup. |
216 | * the lookup. |
134 | * @param rid Request ID of the VFS_LOOKUP request. |
217 | * @param rid Request ID of the VFS_OUT_LOOKUP request. |
135 | * @param request VFS_LOOKUP request data itself. |
218 | * @param request VFS_OUT_LOOKUP request data itself. |
- | 219 | * |
|
136 | */ |
220 | */ |
137 | void libfs_lookup(libfs_ops_t *ops, fs_handle_t fs_handle, ipc_callid_t rid, |
221 | void libfs_lookup(libfs_ops_t *ops, fs_handle_t fs_handle, ipc_callid_t rid, |
138 | ipc_call_t *request) |
222 | ipc_call_t *request) |
139 | { |
223 | { |
140 | unsigned next = IPC_GET_ARG1(*request); |
224 | unsigned first = IPC_GET_ARG1(*request); |
141 | unsigned last = IPC_GET_ARG2(*request); |
225 | unsigned last = IPC_GET_ARG2(*request); |
- | 226 | unsigned next = first; |
|
142 | dev_handle_t dev_handle = IPC_GET_ARG3(*request); |
227 | dev_handle_t dev_handle = IPC_GET_ARG3(*request); |
143 | int lflag = IPC_GET_ARG4(*request); |
228 | int lflag = IPC_GET_ARG4(*request); |
144 | fs_index_t index = IPC_GET_ARG5(*request); /* when L_LINK specified */ |
229 | fs_index_t index = IPC_GET_ARG5(*request); /* when L_LINK specified */ |
145 | char component[NAME_MAX + 1]; |
230 | char component[NAME_MAX + 1]; |
146 | int len; |
231 | int len; |
Line 150... | Line 235... | ||
150 | 235 | ||
151 | fs_node_t *par = NULL; |
236 | fs_node_t *par = NULL; |
152 | fs_node_t *cur = ops->root_get(dev_handle); |
237 | fs_node_t *cur = ops->root_get(dev_handle); |
153 | fs_node_t *tmp = NULL; |
238 | fs_node_t *tmp = NULL; |
154 | 239 | ||
- | 240 | if (cur->mp_data.mp_active) { |
|
- | 241 | ipc_forward_slow(rid, cur->mp_data.phone, VFS_OUT_LOOKUP, |
|
- | 242 | next, last, cur->mp_data.dev_handle, lflag, index, |
|
- | 243 | IPC_FF_ROUTE_FROM_ME); |
|
- | 244 | ops->node_put(cur); |
|
- | 245 | return; |
|
- | 246 | } |
|
- | 247 | ||
155 | if (ops->plb_get_char(next) == '/') |
248 | if (ops->plb_get_char(next) == '/') |
156 | next++; /* eat slash */ |
249 | next++; /* eat slash */ |
157 | 250 | ||
158 | while (next <= last && ops->has_children(cur)) { |
251 | while (next <= last && ops->has_children(cur)) { |
159 | /* collect the component */ |
252 | /* collect the component */ |
Line 172... | Line 265... | ||
172 | component[len] = '\0'; |
265 | component[len] = '\0'; |
173 | next++; /* eat slash */ |
266 | next++; /* eat slash */ |
174 | 267 | ||
175 | /* match the component */ |
268 | /* match the component */ |
176 | tmp = ops->match(cur, component); |
269 | tmp = ops->match(cur, component); |
- | 270 | if (tmp && tmp->mp_data.mp_active) { |
|
- | 271 | if (next > last) |
|
- | 272 | next = last = first; |
|
- | 273 | else |
|
- | 274 | next--; |
|
- | 275 | ||
- | 276 | ipc_forward_slow(rid, tmp->mp_data.phone, |
|
- | 277 | VFS_OUT_LOOKUP, next, last, tmp->mp_data.dev_handle, |
|
- | 278 | lflag, index, IPC_FF_ROUTE_FROM_ME); |
|
- | 279 | ops->node_put(cur); |
|
- | 280 | ops->node_put(tmp); |
|
- | 281 | if (par) |
|
- | 282 | ops->node_put(par); |
|
- | 283 | return; |
|
- | 284 | } |
|
177 | 285 | ||
178 | /* handle miss: match amongst siblings */ |
286 | /* handle miss: match amongst siblings */ |
179 | if (!tmp) { |
287 | if (!tmp) { |
180 | if (next <= last) { |
288 | if (next <= last) { |
181 | /* there are unprocessed components */ |
289 | /* there are unprocessed components */ |
Line 319... | Line 427... | ||
319 | ops->node_put(cur); |
427 | ops->node_put(cur); |
320 | if (tmp) |
428 | if (tmp) |
321 | ops->node_put(tmp); |
429 | ops->node_put(tmp); |
322 | } |
430 | } |
323 | 431 | ||
- | 432 | void libfs_stat(libfs_ops_t *ops, fs_handle_t fs_handle, ipc_callid_t rid, |
|
- | 433 | ipc_call_t *request) |
|
- | 434 | { |
|
- | 435 | dev_handle_t dev_handle = (dev_handle_t) IPC_GET_ARG1(*request); |
|
- | 436 | fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request); |
|
- | 437 | fs_node_t *fn = ops->node_get(dev_handle, index); |
|
- | 438 | ||
- | 439 | ipc_callid_t callid; |
|
- | 440 | size_t size; |
|
- | 441 | if (!ipc_data_read_receive(&callid, &size) || |
|
- | 442 | size != sizeof(struct stat)) { |
|
- | 443 | ipc_answer_0(callid, EINVAL); |
|
- | 444 | ipc_answer_0(rid, EINVAL); |
|
- | 445 | return; |
|
- | 446 | } |
|
- | 447 | ||
- | 448 | struct stat stat; |
|
- | 449 | memset(&stat, 0, sizeof(struct stat)); |
|
- | 450 | ||
- | 451 | stat.fs_handle = fs_handle; |
|
- | 452 | stat.dev_handle = dev_handle; |
|
- | 453 | stat.index = index; |
|
- | 454 | stat.lnkcnt = ops->lnkcnt_get(fn); |
|
- | 455 | stat.is_file = ops->is_file(fn); |
|
- | 456 | stat.size = ops->size_get(fn); |
|
- | 457 | ||
- | 458 | ipc_data_read_finalize(callid, &stat, sizeof(struct stat)); |
|
- | 459 | ipc_answer_0(rid, EOK); |
|
- | 460 | } |
|
- | 461 | ||
- | 462 | /** Open VFS triplet. |
|
- | 463 | * |
|
- | 464 | * @param ops libfs operations structure with function pointers to |
|
- | 465 | * file system implementation |
|
- | 466 | * @param rid Request ID of the VFS_OUT_OPEN_NODE request. |
|
- | 467 | * @param request VFS_OUT_OPEN_NODE request data itself. |
|
- | 468 | * |
|
- | 469 | */ |
|
- | 470 | void libfs_open_node(libfs_ops_t *ops, fs_handle_t fs_handle, ipc_callid_t rid, |
|
- | 471 | ipc_call_t *request) |
|
- | 472 | { |
|
- | 473 | dev_handle_t dev_handle = IPC_GET_ARG1(*request); |
|
- | 474 | fs_index_t index = IPC_GET_ARG2(*request); |
|
- | 475 | ||
- | 476 | fs_node_t *node = ops->node_get(dev_handle, index); |
|
- | 477 | ||
- | 478 | if (node == NULL) { |
|
- | 479 | ipc_answer_0(rid, ENOENT); |
|
- | 480 | return; |
|
- | 481 | } |
|
- | 482 | ||
- | 483 | ipc_answer_5(rid, EOK, fs_handle, dev_handle, index, |
|
- | 484 | ops->size_get(node), ops->lnkcnt_get(node)); |
|
- | 485 | ||
- | 486 | ops->node_put(node); |
|
- | 487 | } |
|
- | 488 | ||
324 | /** @} |
489 | /** @} |
325 | */ |
490 | */ |