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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
27 | */ |
| 28 | 28 | ||
| 29 | /** @addtogroup fs |
29 | /** @addtogroup fs |
| 30 | * @{ |
30 | * @{ |
| 31 | */ |
31 | */ |
| 32 | 32 | ||
| 33 | /** |
33 | /** |
| 34 | * @file vfs.c |
34 | * @file vfs.c |
| 35 | * @brief VFS service for HelenOS. |
35 | * @brief VFS service for HelenOS. |
| 36 | */ |
36 | */ |
| 37 | 37 | ||
| 38 | #include <ipc/ipc.h> |
38 | #include <ipc/ipc.h> |
| 39 | #include <ipc/services.h> |
39 | #include <ipc/services.h> |
| 40 | #include <async.h> |
40 | #include <async.h> |
| Line 47... | Line 47... | ||
| 47 | #include <atomic.h> |
47 | #include <atomic.h> |
| 48 | #include "vfs.h" |
48 | #include "vfs.h" |
| 49 | 49 | ||
| 50 | #define NAME "vfs" |
50 | #define NAME "vfs" |
| 51 | 51 | ||
| 52 | #define dprintf(...) printf(__VA_ARGS__) |
- | |
| 53 | - | ||
| 54 | static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
52 | static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
| 55 | { |
53 | { |
| 56 | bool keep_on_going = 1; |
54 | bool keep_on_going = true; |
| 57 | 55 | ||
| 58 | /* |
56 | /* |
| 59 | * The connection was opened via the IPC_CONNECT_ME_TO call. |
57 | * The connection was opened via the IPC_CONNECT_ME_TO call. |
| 60 | * This call needs to be answered. |
58 | * This call needs to be answered. |
| 61 | */ |
59 | */ |
| 62 | ipc_answer_0(iid, EOK); |
60 | ipc_answer_0(iid, EOK); |
| 63 | 61 | ||
| 64 | /* |
62 | /* |
| 65 | * Here we enter the main connection fibril loop. |
63 | * Here we enter the main connection fibril loop. |
| 66 | * The logic behind this loop and the protocol is that we'd like to keep |
64 | * The logic behind this loop and the protocol is that we'd like to keep |
| 67 | * each connection open until the client hangs up. When the client hangs |
65 | * each connection open until the client hangs up. When the client hangs |
| 68 | * up, we will free its VFS state. The act of hanging up the connection |
66 | * up, we will free its VFS state. The act of hanging up the connection |
| Line 70... | Line 68... | ||
| 70 | * distinguish one from the other. On the other hand, the client can |
68 | * distinguish one from the other. On the other hand, the client can |
| 71 | * hang up arbitrarily if it has no open files and reestablish the |
69 | * hang up arbitrarily if it has no open files and reestablish the |
| 72 | * connection later. |
70 | * connection later. |
| 73 | */ |
71 | */ |
| 74 | while (keep_on_going) { |
72 | while (keep_on_going) { |
| 75 | ipc_callid_t callid; |
- | |
| 76 | ipc_call_t call; |
73 | ipc_call_t call; |
| - | 74 | ipc_callid_t callid = async_get_call(&call); |
|
| 77 | 75 | ||
| 78 | callid = async_get_call(&call); |
76 | fs_handle_t fs_handle; |
| - | 77 | int phone; |
|
| 79 | 78 | ||
| 80 | switch (IPC_GET_METHOD(call)) { |
79 | switch (IPC_GET_METHOD(call)) { |
| 81 | case IPC_M_PHONE_HUNGUP: |
80 | case IPC_M_PHONE_HUNGUP: |
| 82 | keep_on_going = false; |
81 | keep_on_going = false; |
| 83 | break; |
82 | break; |
| - | 83 | case IPC_M_CONNECT_ME_TO: |
|
| - | 84 | /* |
|
| - | 85 | * Connect the client file system to another one. |
|
| - | 86 | */ |
|
| - | 87 | /* FIXME: |
|
| - | 88 | * Prevent ordinary clients from connecting to file |
|
| - | 89 | * system servers directly. This should be solved by |
|
| - | 90 | * applying some security mechanisms. |
|
| - | 91 | */ |
|
| - | 92 | fs_handle = IPC_GET_ARG1(call); |
|
| - | 93 | phone = vfs_grab_phone(fs_handle); |
|
| - | 94 | (void) ipc_forward_fast(callid, phone, 0, 0, 0, |
|
| - | 95 | IPC_FF_NONE); |
|
| - | 96 | vfs_release_phone(phone); |
|
| - | 97 | break; |
|
| 84 | case VFS_REGISTER: |
98 | case VFS_REGISTER: |
| 85 | vfs_register(callid, &call); |
99 | vfs_register(callid, &call); |
| - | 100 | /* |
|
| 86 | keep_on_going = false; |
101 | * Keep the connection open so that a file system can |
| - | 102 | * later ask us to connect it to another file system. |
|
| - | 103 | * This is necessary to support non-root mounts. |
|
| - | 104 | */ |
|
| 87 | break; |
105 | break; |
| 88 | case VFS_MOUNT: |
106 | case VFS_MOUNT: |
| 89 | vfs_mount(callid, &call); |
107 | vfs_mount(callid, &call); |
| 90 | break; |
108 | break; |
| 91 | case VFS_OPEN: |
109 | case VFS_OPEN: |
| Line 118... | Line 136... | ||
| 118 | default: |
136 | default: |
| 119 | ipc_answer_0(callid, ENOTSUP); |
137 | ipc_answer_0(callid, ENOTSUP); |
| 120 | break; |
138 | break; |
| 121 | } |
139 | } |
| 122 | } |
140 | } |
| 123 | - | ||
| 124 | /* TODO: cleanup after the client */ |
- | |
| 125 | 141 | ||
| - | 142 | /* TODO: cleanup after the client */ |
|
| 126 | } |
143 | } |
| 127 | 144 | ||
| 128 | int main(int argc, char **argv) |
145 | int main(int argc, char **argv) |
| 129 | { |
146 | { |
| 130 | ipcarg_t phonead; |
- | |
| 131 | - | ||
| 132 | printf(NAME ": HelenOS VFS server\n"); |
147 | printf(NAME ": HelenOS VFS server\n"); |
| 133 | 148 | ||
| 134 | /* |
149 | /* |
| 135 | * Initialize the list of registered file systems. |
150 | * Initialize the list of registered file systems. |
| 136 | */ |
151 | */ |
| 137 | list_initialize(&fs_head); |
152 | list_initialize(&fs_head); |
| 138 | 153 | ||
| 139 | /* |
154 | /* |
| 140 | * Initialize VFS node hash table. |
155 | * Initialize VFS node hash table. |
| 141 | */ |
156 | */ |
| 142 | if (!vfs_nodes_init()) { |
157 | if (!vfs_nodes_init()) { |
| 143 | printf(NAME ": Failed to initialize VFS node hash table\n"); |
158 | printf(NAME ": Failed to initialize VFS node hash table\n"); |
| 144 | return ENOMEM; |
159 | return ENOMEM; |
| 145 | } |
160 | } |
| 146 | 161 | ||
| 147 | /* |
162 | /* |
| 148 | * Allocate and initialize the Path Lookup Buffer. |
163 | * Allocate and initialize the Path Lookup Buffer. |
| 149 | */ |
164 | */ |
| 150 | list_initialize(&plb_head); |
165 | list_initialize(&plb_head); |
| 151 | plb = as_get_mappable_page(PLB_SIZE); |
166 | plb = as_get_mappable_page(PLB_SIZE); |
| 152 | if (!plb) { |
167 | if (!plb) { |
| 153 | printf(NAME ": Cannot allocate a mappable piece of address space\n"); |
168 | printf(NAME ": Cannot allocate a mappable piece of address space\n"); |
| 154 | return ENOMEM; |
169 | return ENOMEM; |
| 155 | } |
170 | } |
| - | 171 | ||
| 156 | if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE | |
172 | if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE | |
| 157 | AS_AREA_CACHEABLE) != plb) { |
173 | AS_AREA_CACHEABLE) != plb) { |
| 158 | printf(NAME ": Cannot create address space area\n"); |
174 | printf(NAME ": Cannot create address space area\n"); |
| 159 | return ENOMEM; |
175 | return ENOMEM; |
| 160 | } |
176 | } |
| Line 162... | Line 178... | ||
| 162 | 178 | ||
| 163 | /* |
179 | /* |
| 164 | * Set a connectio handling function/fibril. |
180 | * Set a connectio handling function/fibril. |
| 165 | */ |
181 | */ |
| 166 | async_set_client_connection(vfs_connection); |
182 | async_set_client_connection(vfs_connection); |
| 167 | 183 | ||
| 168 | /* |
184 | /* |
| 169 | * Register at the naming service. |
185 | * Register at the naming service. |
| 170 | */ |
186 | */ |
| - | 187 | ipcarg_t phonead; |
|
| 171 | ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, 0, &phonead); |
188 | ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, 0, &phonead); |
| 172 | 189 | ||
| 173 | /* |
190 | /* |
| 174 | * Start accepting connections. |
191 | * Start accepting connections. |
| 175 | */ |
192 | */ |
| 176 | printf(NAME ": Accepting connections\n"); |
193 | printf(NAME ": Accepting connections\n"); |
| 177 | async_manager(); |
194 | async_manager(); |
| 178 | return 0; |
195 | return 0; |
| 179 | } |
196 | } |
| 180 | 197 | ||
| 181 | /** |
198 | /** |
| 182 | * @} |
199 | * @} |
| 183 | */ |
200 | */ |