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(block_dev_desc_t *block_dev,
26 unsigned long start, lbaint_t blkcnt,
29 int dev = block_dev->dev;
30 struct host_block_dev *host_dev = find_host_device(dev);
34 if (os_lseek(host_dev->fd,
35 start * host_dev->blk_dev.blksz,
37 printf("ERROR: Invalid position\n");
40 ssize_t len = os_read(host_dev->fd, buffer,
41 blkcnt * host_dev->blk_dev.blksz);
43 return len / host_dev->blk_dev.blksz;
47 static unsigned long host_block_write(block_dev_desc_t *block_dev,
48 unsigned long start, lbaint_t blkcnt,
51 int dev = block_dev->dev;
52 struct host_block_dev *host_dev = find_host_device(dev);
53 if (os_lseek(host_dev->fd,
54 start * host_dev->blk_dev.blksz,
56 printf("ERROR: Invalid position\n");
59 ssize_t len = os_write(host_dev->fd, buffer, blkcnt *
60 host_dev->blk_dev.blksz);
62 return len / host_dev->blk_dev.blksz;
66 int host_dev_bind(int dev, char *filename)
68 struct host_block_dev *host_dev = find_host_device(dev);
72 if (host_dev->blk_dev.priv) {
73 os_close(host_dev->fd);
74 host_dev->blk_dev.priv = NULL;
76 if (host_dev->filename)
77 free(host_dev->filename);
78 if (filename && *filename) {
79 host_dev->filename = strdup(filename);
81 host_dev->filename = NULL;
85 host_dev->fd = os_open(host_dev->filename, OS_O_RDWR);
86 if (host_dev->fd == -1) {
87 printf("Failed to access host backing file '%s'\n",
92 block_dev_desc_t *blk_dev = &host_dev->blk_dev;
93 blk_dev->if_type = IF_TYPE_HOST;
94 blk_dev->priv = host_dev;
96 blk_dev->lba = os_lseek(host_dev->fd, 0, OS_SEEK_END) / blk_dev->blksz;
97 blk_dev->block_read = host_block_read;
98 blk_dev->block_write = host_block_write;
100 blk_dev->part_type = PART_TYPE_UNKNOWN;
106 int host_get_dev_err(int dev, block_dev_desc_t **blk_devp)
108 struct host_block_dev *host_dev = find_host_device(dev);
113 if (!host_dev->blk_dev.priv)
116 *blk_devp = &host_dev->blk_dev;
120 block_dev_desc_t *host_get_dev(int dev)
122 block_dev_desc_t *blk_dev;
124 if (host_get_dev_err(dev, &blk_dev))