2 * Copyright (C) 2013 Henrik Nordstrom <henrik@henriknordstrom.net>
4 * SPDX-License-Identifier: GPL-2.0+
12 #include <sandboxblockdev.h>
13 #include <asm/errno.h>
15 static struct host_block_dev host_devices[CONFIG_HOST_MAX_DEVICES];
17 static struct host_block_dev *find_host_device(int dev)
19 if (dev >= 0 && dev < CONFIG_HOST_MAX_DEVICES)
20 return &host_devices[dev];
25 static unsigned long host_block_read(int dev, unsigned long start,
26 lbaint_t blkcnt, void *buffer)
28 struct host_block_dev *host_dev = find_host_device(dev);
32 if (os_lseek(host_dev->fd,
33 start * host_dev->blk_dev.blksz,
35 printf("ERROR: Invalid position\n");
38 ssize_t len = os_read(host_dev->fd, buffer,
39 blkcnt * host_dev->blk_dev.blksz);
41 return len / host_dev->blk_dev.blksz;
45 static unsigned long host_block_write(int dev, unsigned long start,
46 lbaint_t blkcnt, const void *buffer)
48 struct host_block_dev *host_dev = find_host_device(dev);
49 if (os_lseek(host_dev->fd,
50 start * host_dev->blk_dev.blksz,
52 printf("ERROR: Invalid position\n");
55 ssize_t len = os_write(host_dev->fd, buffer, blkcnt *
56 host_dev->blk_dev.blksz);
58 return len / host_dev->blk_dev.blksz;
62 int host_dev_bind(int dev, char *filename)
64 struct host_block_dev *host_dev = find_host_device(dev);
68 if (host_dev->blk_dev.priv) {
69 os_close(host_dev->fd);
70 host_dev->blk_dev.priv = NULL;
72 if (host_dev->filename)
73 free(host_dev->filename);
74 if (filename && *filename) {
75 host_dev->filename = strdup(filename);
77 host_dev->filename = NULL;
81 host_dev->fd = os_open(host_dev->filename, OS_O_RDWR);
82 if (host_dev->fd == -1) {
83 printf("Failed to access host backing file '%s'\n",
88 block_dev_desc_t *blk_dev = &host_dev->blk_dev;
89 blk_dev->if_type = IF_TYPE_HOST;
90 blk_dev->priv = host_dev;
92 blk_dev->lba = os_lseek(host_dev->fd, 0, OS_SEEK_END) / blk_dev->blksz;
93 blk_dev->block_read = host_block_read;
94 blk_dev->block_write = host_block_write;
96 blk_dev->part_type = PART_TYPE_UNKNOWN;
102 int host_get_dev_err(int dev, block_dev_desc_t **blk_devp)
104 struct host_block_dev *host_dev = find_host_device(dev);
109 if (!host_dev->blk_dev.priv)
112 *blk_devp = &host_dev->blk_dev;
116 block_dev_desc_t *host_get_dev(int dev)
118 block_dev_desc_t *blk_dev;
120 if (host_get_dev_err(dev, &blk_dev))