| /trunk/uspace/srv/fs/tmpfs/tmpfs.h |
|---|
| 0,0 → 1,59 |
| /* |
| * Copyright (c) 2007 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| /** @addtogroup fs |
| * @{ |
| */ |
| #ifndef TMPFS_TMPFS_H_ |
| #define TMPFS_TMPFS_H_ |
| #include <ipc/ipc.h> |
| #include <libfs.h> |
| #include <atomic.h> |
| #include <sys/types.h> |
| #include <bool.h> |
| #define dprintf(...) printf(__VA_ARGS__) |
| typedef struct tmpfs_dentry { |
| struct tmpfs_dentry *parent; |
| struct tmpfs_dentry *sibling; |
| struct tmpfs_dentry *child; |
| char *name; |
| } tmpfs_dentry_t; |
| extern fs_reg_t tmpfs_reg; |
| extern void tmpfs_lookup(ipc_callid_t, ipc_call_t *); |
| #endif |
| /** |
| * @} |
| */ |
| /trunk/uspace/srv/fs/tmpfs/tmpfs.c |
|---|
| 0,0 → 1,152 |
| /* |
| * Copyright (c) 2006 Martin Decky |
| * Copyright (c) 2007 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| /** @addtogroup fs |
| * @{ |
| */ |
| /** |
| * @file tmpfs.c |
| * @brief File system driver for in-memory file system. |
| * |
| * Every instance of tmpfs exists purely in memory and has neither a disk layout |
| * nor any permanent storage (e.g. disk blocks). With each system reboot, data |
| * stored in a tmpfs file system is lost. |
| */ |
| #include "tmpfs.h" |
| #include <ipc/ipc.h> |
| #include <ipc/services.h> |
| #include <async.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <libfs.h> |
| #include "../../vfs/vfs.h" |
| vfs_info_t tmpfs_vfs_info = { |
| .name = "tmpfs", |
| .ops = { |
| [IPC_METHOD_TO_VFS_OP(VFS_REGISTER)] = VFS_OP_DEFINED, |
| [IPC_METHOD_TO_VFS_OP(VFS_MOUNT)] = VFS_OP_DEFINED, |
| [IPC_METHOD_TO_VFS_OP(VFS_UNMOUNT)] = VFS_OP_DEFINED, |
| [IPC_METHOD_TO_VFS_OP(VFS_LOOKUP)] = VFS_OP_DEFINED, |
| [IPC_METHOD_TO_VFS_OP(VFS_OPEN)] = VFS_OP_DEFINED, |
| [IPC_METHOD_TO_VFS_OP(VFS_CREATE)] = VFS_OP_DEFINED, |
| [IPC_METHOD_TO_VFS_OP(VFS_CLOSE)] = VFS_OP_DEFINED, |
| [IPC_METHOD_TO_VFS_OP(VFS_READ)] = VFS_OP_DEFINED, |
| [IPC_METHOD_TO_VFS_OP(VFS_WRITE)] = VFS_OP_DEFINED, |
| [IPC_METHOD_TO_VFS_OP(VFS_SEEK)] = VFS_OP_DEFAULT |
| } |
| }; |
| fs_reg_t tmpfs_reg; |
| /** |
| * This connection fibril processes VFS requests from VFS. |
| * |
| * In order to support simultaneous VFS requests, our design is as follows. |
| * The connection fibril accepts VFS requests from VFS. If there is only one |
| * instance of the fibril, VFS will need to serialize all VFS requests it sends |
| * to FAT. To overcome this bottleneck, VFS can send TMPFS the |
| * IPC_M_CONNECT_ME_TO call. In that case, a new connection fibril will be |
| * created, which in turn will accept the call. Thus, a new phone will be |
| * opened for VFS. |
| * |
| * There are few issues with this arrangement. First, VFS can run out of |
| * available phones. In that case, VFS can close some other phones or use one |
| * phone for more serialized requests. Similarily, TMPFS can refuse to duplicate |
| * the connection. VFS should then just make use of already existing phones and |
| * route its requests through them. To avoid paying the fibril creation price |
| * upon each request, TMPFS might want to keep the connections open after the |
| * request has been completed. |
| */ |
| static void tmpfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
| { |
| if (iid) { |
| /* |
| * This only happens for connections opened by |
| * IPC_M_CONNECT_ME_TO calls as opposed to callback connections |
| * created by IPC_M_CONNECT_TO_ME. |
| */ |
| ipc_answer_0(iid, EOK); |
| } |
| dprintf("VFS-TMPFS connection established.\n"); |
| while (1) { |
| ipc_callid_t callid; |
| ipc_call_t call; |
| callid = async_get_call(&call); |
| switch (IPC_GET_METHOD(call)) { |
| case VFS_REGISTER: |
| ipc_answer_0(callid, EOK); |
| break; |
| case VFS_LOOKUP: |
| tmpfs_lookup(callid, &call); |
| break; |
| default: |
| ipc_answer_0(callid, ENOTSUP); |
| break; |
| } |
| } |
| } |
| int main(int argc, char **argv) |
| { |
| int vfs_phone; |
| printf("TMPFS: HelenOS TMPFS file system server.\n"); |
| vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0); |
| while (vfs_phone < EOK) { |
| usleep(10000); |
| vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0); |
| } |
| int rc; |
| rc = fs_register(vfs_phone, &tmpfs_reg, &tmpfs_vfs_info, |
| tmpfs_connection); |
| if (rc != EOK) { |
| printf("Failed to register the TMPFS file system (%d)\n", rc); |
| return rc; |
| } |
| dprintf("TMPFS filesystem registered, fs_handle=%d.\n", |
| tmpfs_reg.fs_handle); |
| async_manager(); |
| /* not reached */ |
| return 0; |
| } |
| /** |
| * @} |
| */ |
| /trunk/uspace/srv/fs/tmpfs/tmpfs_ops.c |
|---|
| 0,0 → 1,73 |
| /* |
| * Copyright (c) 2007 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| /** @addtogroup fs |
| * @{ |
| */ |
| /** |
| * @file tmpfs_ops.c |
| * @brief Implementation of VFS operations for the TMPFS file system |
| * server. |
| */ |
| #include "tmpfs.h" |
| #include "../../vfs/vfs.h" |
| #include <ipc/ipc.h> |
| #include <async.h> |
| #include <errno.h> |
| #define PLB_GET_CHAR(i) (tmpfs_reg.plb_ro[(i) % PLB_SIZE]) |
| /** Compare one component of path to a directory entry. |
| * |
| * @param dentry Directory entry to compare the path component with. |
| * @param start Index into PLB where the path component starts. |
| * @param last Index of the last character of the path in PLB. |
| * |
| * @return Zero on failure or delta such that (index + delta) % |
| * PLB_SIZE points to a new path component in PLB. |
| */ |
| static unsigned match_path_component(tmpfs_dentry_t *dentry, unsigned start, |
| unsigned last) |
| { |
| return 0; |
| } |
| void tmpfs_lookup(ipc_callid_t rid, ipc_call_t *request) |
| { |
| int first = IPC_GET_ARG1(*request); |
| int second = IPC_GET_ARG2(*request); |
| int dev_handle = IPC_GET_ARG3(*request); |
| } |
| /** |
| * @} |
| */ |
| /trunk/uspace/srv/fs/tmpfs/Makefile |
|---|
| 0,0 → 1,76 |
| # |
| # Copyright (c) 2006 Martin Decky |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions |
| # are met: |
| # |
| # - Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # - Redistributions in binary form must reproduce the above copyright |
| # notice, this list of conditions and the following disclaimer in the |
| # documentation and/or other materials provided with the distribution. |
| # - The name of the author may not be used to endorse or promote products |
| # derived from this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| # |
| ## Setup toolchain |
| # |
| LIBC_PREFIX = ../../../lib/libc |
| LIBFS_PREFIX = ../../../lib/libfs |
| SOFTINT_PREFIX = ../../../lib/softint |
| include $(LIBC_PREFIX)/Makefile.toolchain |
| CFLAGS += -I $(LIBFS_PREFIX) |
| LIBS = $(LIBC_PREFIX)/libc.a $(LIBFS_PREFIX)/libfs.a |
| ## Sources |
| # |
| OUTPUT = tmpfs |
| SOURCES = \ |
| tmpfs.c \ |
| tmpfs_ops.c |
| OBJECTS := $(addsuffix .o,$(basename $(SOURCES))) |
| .PHONY: all clean depend disasm |
| all: $(OUTPUT) disasm |
| -include Makefile.depend |
| clean: |
| -rm -f $(OUTPUT) $(OUTPUT).map $(OUTPUT).disasm Makefile.depend |
| depend: |
| $(CC) $(DEFS) $(CFLAGS) -M $(SOURCES) > Makefile.depend |
| $(OUTPUT): $(OBJECTS) $(LIBS) |
| $(LD) -T $(LIBC_PREFIX)/arch/$(ARCH)/_link.ld $(OBJECTS) $(LIBS) $(LFLAGS) -o $@ -Map $(OUTPUT).map |
| disasm: |
| $(OBJDUMP) -d $(OUTPUT) >$(OUTPUT).disasm |
| %.o: %.S |
| $(CC) $(DEFS) $(AFLAGS) $(CFLAGS) -D__ASM__ -c $< -o $@ |
| %.o: %.s |
| $(AS) $(AFLAGS) $< -o $@ |
| %.o: %.c |
| $(CC) $(DEFS) $(CFLAGS) -c $< -o $@ |
| /trunk/uspace/Makefile |
|---|
| 42,6 → 42,7 |
| srv/console \ |
| srv/rd \ |
| srv/fs/fat \ |
| srv/fs/tmpfs \ |
| srv/vfs \ |
| srv/devmap \ |
| app/tetris \ |