/** * This routine processes the lseek() system call. * * @param iop * @param offset * @param whence * @return off_t */ static off_t rtems_rfs_rtems_file_lseek (rtems_libio_t* iop, off_t offset, int whence) { rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); off_t old_offset; off_t new_offset; if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_LSEEK)) printf("rtems-rfs: file-lseek: handle:%p offset:%" PRIdoff_t "\n", file, offset); rtems_rfs_rtems_lock (rtems_rfs_file_fs (file)); old_offset = iop->offset; new_offset = rtems_filesystem_default_lseek_file (iop, offset, whence); if (new_offset != -1) { rtems_rfs_pos pos = iop->offset; int rc = rtems_rfs_file_seek (file, pos, &pos); if (rc) { rtems_rfs_rtems_error ("file_lseek: lseek", rc); iop->offset = old_offset; new_offset = -1; } } rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); return new_offset; }
/** * This rountine will verify that the node being opened as a directory is in * fact a directory node. If it is then the offset into the directory will be * set to 0 to position to the first directory entry. */ static int rtems_rfs_rtems_dir_open (rtems_libio_t* iop, const char* pathname, int oflag, mode_t mode) { rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (&iop->pathinfo); rtems_rfs_ino ino = rtems_rfs_rtems_get_iop_ino (iop); rtems_rfs_inode_handle inode; int rc; rtems_rfs_rtems_lock (fs); rc = rtems_rfs_inode_open (fs, ino, &inode, true); if (rc) { rtems_rfs_rtems_unlock (fs); return rtems_rfs_rtems_error ("dir_open: opening inode", rc); } if (!RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode))) { rtems_rfs_inode_close (fs, &inode); rtems_rfs_rtems_unlock (fs); return rtems_rfs_rtems_error ("dir_open: not dir", ENOTDIR); } iop->offset = 0; rtems_rfs_inode_close (fs, &inode); rtems_rfs_rtems_unlock (fs); return 0; }
/** * Lock the file system. */ static void rtems_rfs_shell_lock_rfs (rtems_rfs_file_system* fs) { #if __rtems__ rtems_rfs_rtems_lock (fs); #endif }
static int rtems_rfs_rtems_dir_rmnod (rtems_filesystem_location_info_t* parent_pathloc, rtems_filesystem_location_info_t* pathloc) { rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_pathloc); rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); uint32_t doff = rtems_rfs_rtems_get_pathloc_doff (pathloc); int rc; if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_DIR_RMNOD)) printf ("rtems-rfs: dir-rmnod: parent:%" PRId32 " doff:%" PRIu32 ", ino:%" PRId32 "\n", parent, doff, ino); if (ino == RTEMS_RFS_ROOT_INO) return rtems_rfs_rtems_error ("dir_rmnod: root inode", EBUSY); rtems_rfs_rtems_lock (fs); rc = rtems_rfs_unlink (fs, parent, ino, doff, rtems_rfs_unlink_dir_if_empty); if (rc) { rtems_rfs_rtems_unlock (fs); return rtems_rfs_rtems_error ("dir_rmnod: unlinking", rc); } rtems_rfs_rtems_unlock (fs); return 0; }
/** * This routine processes the lseek() system call. * * @param iop * @param offset * @param whence * @return off_t */ static off_t rtems_rfs_rtems_file_lseek (rtems_libio_t* iop, off_t offset, int whence) { rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); rtems_rfs_pos pos; int rc; if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_LSEEK)) printf("rtems-rfs: file-lseek: handle:%p offset:%" PRIdoff_t "\n", file, offset); rtems_rfs_rtems_lock (rtems_rfs_file_fs (file)); pos = iop->offset; rc = rtems_rfs_file_seek (file, pos, &pos); if (rc) { rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); return rtems_rfs_rtems_error ("file_lseek: lseek", rc); } rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); return iop->offset; }
/** * This routine processes the read() system call. * * @param iop * @param buffer * @param count * @return int */ static ssize_t rtems_rfs_rtems_file_read (rtems_libio_t* iop, void* buffer, size_t count) { rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); rtems_rfs_pos pos; uint8_t* data = buffer; ssize_t read = 0; int rc; if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_READ)) printf("rtems-rfs: file-read: handle:%p count:%zd\n", file, count); rtems_rfs_rtems_lock (rtems_rfs_file_fs (file)); pos = iop->offset; if (pos < rtems_rfs_file_size (file)) { while (count) { size_t size; rc = rtems_rfs_file_io_start (file, &size, true); if (rc > 0) { read = rtems_rfs_rtems_error ("file-read: read: io-start", rc); break; } if (size == 0) break; if (size > count) size = count; memcpy (data, rtems_rfs_file_data (file), size); data += size; count -= size; read += size; rc = rtems_rfs_file_io_end (file, size, true); if (rc > 0) { read = rtems_rfs_rtems_error ("file-read: read: io-end", rc); break; } } } if (read >= 0) iop->offset = pos + read; rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); return read; }
static void rtems_rfs_rtems_lock_by_mt_entry ( const rtems_filesystem_mount_table_entry_t *mt_entry ) { rtems_rfs_file_system* fs = mt_entry->fs_info; rtems_rfs_rtems_lock (fs); }
/** * This routine will read the next directory entry based on the directory * offset. The offset should be equal to -n- time the size of an individual * dirent structure. If n is not an integer multiple of the sizeof a dirent * structure, an integer division will be performed to determine directory * entry that will be returned in the buffer. Count should reflect -m- times * the sizeof dirent bytes to be placed in the buffer. If there are not -m- * dirent elements from the current directory position to the end of the * exisiting file, the remaining entries will be placed in the buffer and the * returned value will be equal to -m actual- times the size of a directory * entry. */ static ssize_t rtems_rfs_rtems_dir_read (rtems_libio_t* iop, void* buffer, size_t count) { rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (&iop->pathinfo); rtems_rfs_ino ino = rtems_rfs_rtems_get_iop_ino (iop); rtems_rfs_inode_handle inode; struct dirent* dirent; ssize_t bytes_transferred; int d; int rc; count = count / sizeof (struct dirent); dirent = buffer; rtems_rfs_rtems_lock (fs); rc = rtems_rfs_inode_open (fs, ino, &inode, true); if (rc) { rtems_rfs_rtems_unlock (fs); return rtems_rfs_rtems_error ("dir_read: read inode", rc); } bytes_transferred = 0; for (d = 0; d < count; d++, dirent++) { size_t size; rc = rtems_rfs_dir_read (fs, &inode, iop->offset, dirent, &size); if (rc == ENOENT) { rc = 0; break; } if (rc > 0) { bytes_transferred = rtems_rfs_rtems_error ("dir_read: dir read", rc); break; } iop->offset += size; bytes_transferred += sizeof (struct dirent); } rtems_rfs_inode_close (fs, &inode); rtems_rfs_rtems_unlock (fs); return bytes_transferred; }
/** * This handler maps an open() operation onto rtems_io_open(). * * @param iop * @param pathname * @param flag * @param mode * @return int */ static int rtems_rfs_rtems_device_open ( rtems_libio_t *iop, const char *pathname, uint32_t flag, uint32_t mode) { rtems_libio_open_close_args_t args; rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (&iop->pathinfo); rtems_rfs_ino ino = rtems_rfs_rtems_get_iop_ino (iop); rtems_rfs_inode_handle inode; int major; int minor; rtems_status_code status; int rc; rtems_rfs_rtems_lock (fs); rc = rtems_rfs_inode_open (fs, ino, &inode, true); if (rc > 0) { rtems_rfs_rtems_unlock (fs); return rtems_rfs_rtems_error ("device_open: opening inode", rc); } major = rtems_rfs_inode_get_block (&inode, 0); minor = rtems_rfs_inode_get_block (&inode, 1); rc = rtems_rfs_inode_close (fs, &inode); if (rc > 0) { rtems_rfs_rtems_unlock (fs); return rtems_rfs_rtems_error ("device_open: closing inode", rc); } rtems_rfs_rtems_unlock (fs); iop->data0 = major; iop->data1 = (void*)((intptr_t) minor); args.iop = iop; args.flags = iop->flags; args.mode = mode; status = rtems_io_open (major, minor, (void *) &args); if (status) return rtems_deviceio_errno(status); return 0; }
/** * This routine processes the close() system call. Note that there is nothing * to flush at this point. * * @param iop * @return int */ static int rtems_rfs_rtems_file_close (rtems_libio_t* iop) { rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); rtems_rfs_file_system* fs = rtems_rfs_file_fs (file); int rc; if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_CLOSE)) printf("rtems-rfs: file-close: handle:%p\n", file); rtems_rfs_rtems_lock (fs); rc = rtems_rfs_file_close (fs, file); if (rc > 0) rc = rtems_rfs_rtems_error ("file-close: file close", rc); rtems_rfs_rtems_unlock (fs); return rc; }
/** * This routine processes the ftruncate() system call. * * @param iop * @param length * @return int */ static int rtems_rfs_rtems_file_ftruncate (rtems_libio_t* iop, off_t length) { rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); int rc; if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_FTRUNC)) printf("rtems-rfs: file-ftrunc: handle:%p length:%" PRIdoff_t "\n", file, length); rtems_rfs_rtems_lock (rtems_rfs_file_fs (file)); rc = rtems_rfs_file_set_size (file, length); if (rc) rc = rtems_rfs_rtems_error ("file_ftruncate: set size", rc); rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); return rc; }
/** * This handler maps an open() operation onto rtems_io_open(). * * @param iop * @param pathname * @param flag * @param mode * @return int */ static int rtems_rfs_rtems_device_open ( rtems_libio_t *iop, const char *pathname, int oflag, mode_t mode) { rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (&iop->pathinfo); rtems_rfs_ino ino = rtems_rfs_rtems_get_iop_ino (iop); rtems_rfs_inode_handle inode; rtems_device_major_number major; rtems_device_minor_number minor; int rc; rtems_rfs_rtems_lock (fs); rc = rtems_rfs_inode_open (fs, ino, &inode, true); if (rc > 0) { rtems_rfs_rtems_unlock (fs); return rtems_rfs_rtems_error ("device_open: opening inode", rc); } major = rtems_rfs_inode_get_block (&inode, 0); minor = rtems_rfs_inode_get_block (&inode, 1); rc = rtems_rfs_inode_close (fs, &inode); if (rc > 0) { rtems_rfs_rtems_unlock (fs); return rtems_rfs_rtems_error ("device_open: closing inode", rc); } rtems_rfs_rtems_unlock (fs); iop->data0 = major; iop->data1 = (void *) (uintptr_t) minor; return rtems_deviceio_open (iop, pathname, oflag, mode, minor, major); }
static int rtems_rfs_rtems_file_open (rtems_libio_t* iop, const char* pathname, int oflag, mode_t mode) { rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (&iop->pathinfo); rtems_rfs_ino ino; rtems_rfs_file_handle* file; int flags; int rc; flags = 0; if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_OPEN)) printf("rtems-rfs: file-open: path:%s ino:%" PRId32 " flags:%04i mode:%04" PRIu32 "\n", pathname, ino, flags, mode); rtems_rfs_rtems_lock (fs); ino = rtems_rfs_rtems_get_iop_ino (iop); rc = rtems_rfs_file_open (fs, ino, flags, &file); if (rc > 0) { rtems_rfs_rtems_unlock (fs); return rtems_rfs_rtems_error ("file-open: open", rc); } if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_OPEN)) printf("rtems-rfs: file-open: handle:%p\n", file); iop->size = rtems_rfs_file_size (file); rtems_rfs_rtems_set_iop_file_handle (iop, file); rtems_rfs_rtems_unlock (fs); return 0; }
/** * This routine processes the write() system call. * * @param iop * @param buffer * @param count * @return ssize_t */ static ssize_t rtems_rfs_rtems_file_write (rtems_libio_t* iop, const void* buffer, size_t count) { rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); rtems_rfs_pos pos; rtems_rfs_pos file_size; const uint8_t* data = buffer; ssize_t write = 0; int rc; if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_WRITE)) printf("rtems-rfs: file-write: handle:%p count:%zd\n", file, count); rtems_rfs_rtems_lock (rtems_rfs_file_fs (file)); pos = iop->offset; file_size = rtems_rfs_file_size (file); if (pos > file_size) { /* * If the iop position is past the physical end of the file we need to set * the file size to the new length before writing. The * rtems_rfs_file_io_end() will grow the file subsequently. */ rc = rtems_rfs_file_set_size (file, pos); if (rc) { rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); return rtems_rfs_rtems_error ("file-write: write extend", rc); } rtems_rfs_file_set_bpos (file, pos); } else if (pos < file_size && rtems_libio_iop_is_append(iop)) { pos = file_size; rc = rtems_rfs_file_seek (file, pos, &pos); if (rc) { rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); return rtems_rfs_rtems_error ("file-write: write append seek", rc); } } while (count) { size_t size = count; rc = rtems_rfs_file_io_start (file, &size, false); if (rc) { /* * If we have run out of space and have written some data return that * amount first as the inode will have accounted for it. This means * there was no error and the return code from can be ignored. */ if (!write) write = rtems_rfs_rtems_error ("file-write: write open", rc); break; } if (size > count) size = count; memcpy (rtems_rfs_file_data (file), data, size); data += size; count -= size; write += size; rc = rtems_rfs_file_io_end (file, size, false); if (rc) { write = rtems_rfs_rtems_error ("file-write: write close", rc); break; } } if (write >= 0) iop->offset = pos + write; rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); return write; }
/** * This routine processes the write() system call. * * @param iop * @param buffer * @param count * @return ssize_t */ static ssize_t rtems_rfs_rtems_file_write (rtems_libio_t* iop, const void* buffer, size_t count) { rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); rtems_rfs_pos pos; const uint8_t* data = buffer; ssize_t write = 0; int rc; if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_WRITE)) printf("rtems-rfs: file-write: handle:%p count:%zd\n", file, count); rtems_rfs_rtems_lock (rtems_rfs_file_fs (file)); pos = iop->offset; /* * If the iop position is past the physical end of the file we need to set * the file size to the new length before writing. If the position equals the * size of file we are still past the end of the file as positions number * from 0. For a specific position we need a file that has a length of one * more. */ if (pos >= rtems_rfs_file_size (file)) { rc = rtems_rfs_file_set_size (file, pos + 1); if (rc) { rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); return rtems_rfs_rtems_error ("file-write: write extend", rc); } } rtems_rfs_file_set_bpos (file, pos); while (count) { size_t size = count; rc = rtems_rfs_file_io_start (file, &size, false); if (rc) { write = rtems_rfs_rtems_error ("file-write: write open", rc); break; } if (size > count) size = count; memcpy (rtems_rfs_file_data (file), data, size); data += size; count -= size; write += size; rc = rtems_rfs_file_io_end (file, size, false); if (rc) { write = rtems_rfs_rtems_error ("file-write: write close", rc); break; } } iop->size = rtems_rfs_file_size (file); rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); return write; }