476 lines
11 KiB
C
476 lines
11 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#define pr_fmt(fmt) "barebox-ratpfs: " fmt
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#include <common.h>
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#include <command.h>
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#include <init.h>
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#include <malloc.h>
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#include <fs.h>
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#include <errno.h>
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#include <linux/stat.h>
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#include <asm/unaligned.h>
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#include <ratp_bb.h>
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#define RATPFS_TYPE_MOUNT_CALL 1
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#define RATPFS_TYPE_MOUNT_RETURN 2
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#define RATPFS_TYPE_READDIR_CALL 3
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#define RATPFS_TYPE_READDIR_RETURN 4
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#define RATPFS_TYPE_STAT_CALL 5
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#define RATPFS_TYPE_STAT_RETURN 6
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#define RATPFS_TYPE_OPEN_CALL 7
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#define RATPFS_TYPE_OPEN_RETURN 8
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#define RATPFS_TYPE_READ_CALL 9
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#define RATPFS_TYPE_READ_RETURN 10
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#define RATPFS_TYPE_WRITE_CALL 11
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#define RATPFS_TYPE_WRITE_RETURN 12
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#define RATPFS_TYPE_CLOSE_CALL 13
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#define RATPFS_TYPE_CLOSE_RETURN 14
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#define RATPFS_TYPE_TRUNCATE_CALL 15
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#define RATPFS_TYPE_TRUNCATE_RETURN 16
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struct ratpfs_file {
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uint32_t handle;
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};
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struct ratpfs_dir {
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char *entries;
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int len, off;
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DIR dir;
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};
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static int ratpfs_create(struct device_d __always_unused *dev,
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const char __always_unused *pathname,
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mode_t __always_unused mode)
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{
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pr_debug("%s\n", __func__);
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return 0;
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}
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static int ratpfs_mkdir(struct device_d __always_unused *dev,
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const char __always_unused *pathname)
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{
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pr_debug("%s\n", __func__);
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return -ENOSYS;
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}
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static int ratpfs_rm(struct device_d __always_unused *dev,
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const char *pathname)
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{
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pr_debug("%s\n", __func__);
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/* Get rid of leading '/' */
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pathname = &pathname[1];
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return 0;
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}
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static int ratpfs_truncate(struct device_d __always_unused *dev,
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FILE *f, ulong size)
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{
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int len_tx = 1 /* type */
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+ 4 /* handle */
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+ 4 /* size */;
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struct ratp_bb_pkt *pkt_tx = xzalloc(sizeof(*pkt_tx)+len_tx);
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struct ratp_bb_pkt *pkt_rx = NULL;
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struct ratpfs_file *rfile = f->priv;
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int ret;
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pr_debug("%s: len_tx=%i handle=%i size=%i\n", __func__,
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len_tx, rfile->handle, (int)size);
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pkt_tx->len = len_tx;
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pkt_tx->data[0] = RATPFS_TYPE_TRUNCATE_CALL;
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put_unaligned_be32(rfile->handle, &pkt_tx->data[1]);
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put_unaligned_be32(size, &pkt_tx->data[5]);
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ret = barebox_ratp_fs_call(pkt_tx, &pkt_rx);
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if (ret) {
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ret = -EIO;
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goto out;
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}
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pr_debug("%s: len_rx=%i\n", __func__, pkt_rx->len);
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if (pkt_rx->len < 1 || pkt_rx->data[0] != RATPFS_TYPE_TRUNCATE_RETURN) {
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pr_err("invalid truncate response\n");
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ret = -EIO;
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goto out;
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}
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out:
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free(pkt_rx);
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return ret;
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}
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static int ratpfs_open(struct device_d __always_unused *dev,
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FILE *file, const char *filename)
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{
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int len_name = strlen(filename);
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int len_tx = 1 /* type */
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+ 4 /* flags */
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+ len_name /* path */;
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struct ratp_bb_pkt *pkt_tx = xzalloc(sizeof(*pkt_tx) + len_tx);
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struct ratp_bb_pkt *pkt_rx = NULL;
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struct ratpfs_file *rfile = xzalloc(sizeof(*rfile));
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int ret;
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pr_debug("%s: len_tx=%i filename='%s'\n", __func__, len_tx, filename);
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pkt_tx->len = len_tx;
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pkt_tx->data[0] = RATPFS_TYPE_OPEN_CALL;
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put_unaligned_be32(file->flags, &pkt_tx->data[1]);
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memcpy(&pkt_tx->data[5], filename, len_name);
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ret = barebox_ratp_fs_call(pkt_tx, &pkt_rx);
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if (ret) {
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ret = -EIO;
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goto err;
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}
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pr_debug("%s: len_rx=%i\n", __func__, pkt_rx->len);
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if (pkt_rx->len < 1 || pkt_rx->data[0] != RATPFS_TYPE_OPEN_RETURN) {
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pr_err("invalid open response\n");
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ret = -EIO;
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goto err;
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}
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rfile->handle = get_unaligned_be32(&pkt_rx->data[1]);
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if (rfile->handle == 0) {
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ret = -get_unaligned_be32(&pkt_rx->data[5]); /* errno */
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goto err;
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}
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file->priv = rfile;
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file->size = get_unaligned_be32(&pkt_rx->data[5]);
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goto out;
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err:
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file->priv = NULL;
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free(rfile);
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out:
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free(pkt_rx);
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return ret;
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}
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static int ratpfs_close(struct device_d __always_unused *dev,
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FILE *f)
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{
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int len_tx = 1 /* type */
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+ 4 /* handle */;
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struct ratp_bb_pkt *pkt_tx = xzalloc(sizeof(*pkt_tx) + len_tx);
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struct ratp_bb_pkt *pkt_rx = NULL;
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struct ratpfs_file *rfile = f->priv;
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int ret;
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pr_debug("%s: len_tx=%i handle=%i\n", __func__,
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len_tx, rfile->handle);
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pkt_tx->len = len_tx;
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pkt_tx->data[0] = RATPFS_TYPE_CLOSE_CALL;
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put_unaligned_be32(rfile->handle, &pkt_tx->data[1]);
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ret = barebox_ratp_fs_call(pkt_tx, &pkt_rx);
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if (ret) {
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ret = -EIO;
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goto out;
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}
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pr_debug("%s: len_rx=%i\n", __func__, pkt_rx->len);
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if (pkt_rx->len < 1 || pkt_rx->data[0] != RATPFS_TYPE_CLOSE_RETURN) {
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pr_err("invalid close response\n");
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goto out;
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}
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out:
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free(pkt_rx);
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return ret;
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}
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static int ratpfs_write(struct device_d __always_unused *dev,
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FILE *f, const void *buf, size_t orig_size)
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{
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int size = min((int)orig_size, 4096);
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int len_tx = 1 /* type */
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+ 4 /* handle */
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+ 4 /* pos */
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+ size /* data */;
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struct ratp_bb_pkt *pkt_tx = xzalloc(sizeof(*pkt_tx) + len_tx);
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struct ratp_bb_pkt *pkt_rx = NULL;
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struct ratpfs_file *rfile = f->priv;
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int ret;
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pr_debug("%s: len_tx=%i handle=%i pos=%i size=%i\n", __func__,
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len_tx, rfile->handle, (int)f->pos, size);
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pkt_tx->len = len_tx;
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pkt_tx->data[0] = RATPFS_TYPE_WRITE_CALL;
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put_unaligned_be32(rfile->handle, &pkt_tx->data[1]);
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put_unaligned_be32(f->pos, &pkt_tx->data[5]);
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memcpy(&pkt_tx->data[9], buf, size);
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ret = barebox_ratp_fs_call(pkt_tx, &pkt_rx);
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if (ret) {
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ret = -EIO;
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goto out;
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}
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pr_debug("%s: len_rx=%i\n", __func__, pkt_rx->len);
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if (pkt_rx->len < 1 || pkt_rx->data[0] != RATPFS_TYPE_WRITE_RETURN) {
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pr_err("invalid write response\n");
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ret = -EIO;
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goto out;
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}
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ret = size;
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out:
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free(pkt_rx);
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return ret;
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}
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static int ratpfs_read(struct device_d __always_unused *dev,
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FILE *f, void *buf, size_t orig_size)
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{
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int size = min((int)orig_size, 4096);
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int len_tx = 1 /* type */
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+ 4 /* handle */
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+ 4 /* pos */
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+ 4 /* size */;
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struct ratp_bb_pkt *pkt_tx = xzalloc(sizeof(*pkt_tx) + len_tx);
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struct ratp_bb_pkt *pkt_rx = NULL;
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struct ratpfs_file *rfile = f->priv;
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int ret;
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pr_debug("%s: len_tx=%i handle=%i pos=%i size=%i\n", __func__,
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len_tx, rfile->handle, (int)f->pos, size);
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pkt_tx->len = len_tx;
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pkt_tx->data[0] = RATPFS_TYPE_READ_CALL;
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put_unaligned_be32(rfile->handle, &pkt_tx->data[1]);
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put_unaligned_be32(f->pos, &pkt_tx->data[5]);
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put_unaligned_be32(size, &pkt_tx->data[9]);
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ret = barebox_ratp_fs_call(pkt_tx, &pkt_rx);
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if (ret) {
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ret = -EIO;
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goto out;
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}
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pr_debug("%s: len_rx=%i\n", __func__, pkt_rx->len);
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if (pkt_rx->len < 1 || pkt_rx->data[0] != RATPFS_TYPE_READ_RETURN) {
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pr_err("invalid read response\n");
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ret = -EIO;
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goto out;
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}
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size = pkt_rx->len - 1;
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memcpy(buf, &pkt_rx->data[1], size);
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ret = size;
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out:
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free(pkt_rx);
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return ret;
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}
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static loff_t ratpfs_lseek(struct device_d __always_unused *dev,
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FILE *f, loff_t pos)
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{
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pr_debug("%s\n", __func__);
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f->pos = pos;
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return f->pos;
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}
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static DIR* ratpfs_opendir(struct device_d __always_unused *dev,
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const char *pathname)
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{
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int len_name = strlen(pathname);
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int len_tx = 1 /* type */
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+ len_name /* path */;
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struct ratp_bb_pkt *pkt_tx = xzalloc(sizeof(*pkt_tx)+len_tx);
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struct ratp_bb_pkt *pkt_rx = NULL;
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struct ratpfs_dir *rdir = xzalloc(sizeof(*rdir));
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int ret;
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pr_debug("%s: len_tx=%i pathname='%s'\n", __func__, len_tx, pathname);
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pkt_tx->len = len_tx;
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pkt_tx->data[0] = RATPFS_TYPE_READDIR_CALL;
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memcpy(&pkt_tx->data[1], pathname, len_name);
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ret = barebox_ratp_fs_call(pkt_tx, &pkt_rx);
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if (!ret) {
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pr_debug("%s: len_rx=%i\n", __func__, pkt_rx->len);
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if (pkt_rx->len < 1 || pkt_rx->data[0] != RATPFS_TYPE_READDIR_RETURN) {
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pr_err("invalid readdir response\n");
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free(pkt_rx);
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return NULL;
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}
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rdir->len = pkt_rx->len - 1;
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rdir->entries = xmemdup(&pkt_rx->data[1], rdir->len);
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free(pkt_rx);
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return &rdir->dir;
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} else {
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return NULL;
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}
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}
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static struct dirent *ratpfs_readdir(struct device_d *dev, DIR *dir)
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{
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struct ratpfs_dir *rdir = container_of(dir, struct ratpfs_dir, dir);
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int i;
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pr_debug("%s\n", __func__);
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if (rdir->len <= rdir->off)
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return NULL;
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for (i = 0; rdir->off < rdir->len; rdir->off++, i++) {
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dir->d.d_name[i] = rdir->entries[rdir->off];
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if (dir->d.d_name[i] == 0)
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break;
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}
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rdir->off++;
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return &dir->d;
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}
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static int ratpfs_closedir(struct device_d *dev, DIR *dir)
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{
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struct ratpfs_dir *rdir = container_of(dir, struct ratpfs_dir, dir);
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pr_debug("%s\n", __func__);
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free(rdir->entries);
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free(rdir);
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return 0;
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}
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static int ratpfs_stat(struct device_d __always_unused *dev,
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const char *filename, struct stat *s)
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{
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int len_name = strlen(filename);
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int len_tx = 1 /* type */
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+ len_name; /* path */
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struct ratp_bb_pkt *pkt_tx = xzalloc(sizeof(*pkt_tx) + len_tx);
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struct ratp_bb_pkt *pkt_rx = NULL;
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int ret;
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pr_debug("%s: len_tx=%i filename='%s'\n", __func__, len_tx, filename);
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pkt_tx->len = len_tx;
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pkt_tx->data[0] = RATPFS_TYPE_STAT_CALL;
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memcpy(&pkt_tx->data[1], filename, len_name);
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ret = barebox_ratp_fs_call(pkt_tx, &pkt_rx);
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if (ret) {
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ret = -EIO;
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goto out;
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}
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pr_debug("%s: len_rx=%i\n", __func__, pkt_rx->len);
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if (pkt_rx->len < 6 || pkt_rx->data[0] != RATPFS_TYPE_STAT_RETURN) {
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pr_err("invalid stat response\n");
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goto out;
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}
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switch (pkt_rx->data[1]) {
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case 0:
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ret = -ENOENT;
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break;
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case 1:
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s->st_mode = S_IFREG | S_IRWXU | S_IRWXG | S_IRWXO;
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break;
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case 2:
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s->st_mode = S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO;
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break;
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}
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s->st_size = get_unaligned_be32(&pkt_rx->data[2]);
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out:
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free(pkt_rx);
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return ret;
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}
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static int ratpfs_probe(struct device_d *dev)
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{
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int len_tx = 1; /* type */
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struct ratp_bb_pkt *pkt_tx = xzalloc(sizeof(*pkt_tx) + len_tx);
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struct ratp_bb_pkt *pkt_rx = NULL;
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int ret;
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struct fs_device_d *fsdev = dev_to_fs_device(dev);
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pr_debug("%s\n", __func__);
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ret = barebox_ratp_fs_mount(fsdev->path);
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if (ret)
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return ret;
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pkt_tx->len = len_tx;
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pkt_tx->data[0] = RATPFS_TYPE_MOUNT_CALL;
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ret = barebox_ratp_fs_call(pkt_tx, &pkt_rx);
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if (ret)
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goto out;
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if (pkt_rx->len < 1 || pkt_rx->data[0] != RATPFS_TYPE_MOUNT_RETURN) {
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pr_err("invalid mount response\n");
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ret = -EINVAL;
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goto out;
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}
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out:
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free(pkt_rx);
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if (ret)
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barebox_ratp_fs_mount(NULL);
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return ret;
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}
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static void ratpfs_remove(struct device_d __always_unused *dev)
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{
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pr_debug("%s\n", __func__);
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barebox_ratp_fs_mount(NULL);
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}
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static struct fs_driver_d ratpfs_driver = {
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.open = ratpfs_open,
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.close = ratpfs_close,
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.read = ratpfs_read,
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.lseek = ratpfs_lseek,
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.opendir = ratpfs_opendir,
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.readdir = ratpfs_readdir,
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.closedir = ratpfs_closedir,
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.stat = ratpfs_stat,
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.create = ratpfs_create,
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.unlink = ratpfs_rm,
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.mkdir = ratpfs_mkdir,
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.rmdir = ratpfs_rm,
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.write = ratpfs_write,
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.truncate = ratpfs_truncate,
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.flags = FS_DRIVER_NO_DEV,
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.drv = {
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.probe = ratpfs_probe,
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.remove = ratpfs_remove,
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.name = "ratpfs",
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}
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};
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static int ratpfs_init(void)
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{
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return register_fs_driver(&ratpfs_driver);
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}
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coredevice_initcall(ratpfs_init); |