Contributors: 2
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ming Lei |
273 |
95.79% |
4 |
80.00% |
| Caleb Sander |
12 |
4.21% |
1 |
20.00% |
| Total |
285 |
|
5 |
|
// SPDX-License-Identifier: GPL-2.0
#include "kublk.h"
void backing_file_tgt_deinit(struct ublk_dev *dev)
{
int i;
for (i = 1; i < dev->nr_fds; i++) {
fsync(dev->fds[i]);
close(dev->fds[i]);
}
}
int backing_file_tgt_init(struct ublk_dev *dev, unsigned int nr_direct)
{
int fd, i;
ublk_assert(dev->nr_fds == 1);
for (i = 0; i < dev->tgt.nr_backing_files; i++) {
char *file = dev->tgt.backing_file[i];
unsigned long bytes;
struct stat st;
ublk_dbg(UBLK_DBG_DEV, "%s: file %d: %s\n", __func__, i, file);
fd = open(file, O_RDWR | (i < nr_direct ? O_DIRECT : 0));
if (fd < 0) {
ublk_err("%s: backing file %s can't be opened: %s\n",
__func__, file, strerror(errno));
return -EBADF;
}
if (fstat(fd, &st) < 0) {
close(fd);
return -EBADF;
}
if (S_ISREG(st.st_mode))
bytes = st.st_size;
else if (S_ISBLK(st.st_mode)) {
if (ioctl(fd, BLKGETSIZE64, &bytes) != 0)
return -1;
} else {
return -EINVAL;
}
dev->tgt.backing_file_size[i] = bytes;
dev->fds[dev->nr_fds] = fd;
dev->nr_fds += 1;
}
return 0;
}