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10d962dae2
Move two functions for initializing & de-initializing backing file into common.c. Also move one common helper into kublk.h. Prepare for supporting ublk-stripe. Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20250322093218.431419-5-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
56 lines
1023 B
C
56 lines
1023 B
C
// SPDX-License-Identifier: GPL-2.0
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#include "kublk.h"
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void backing_file_tgt_deinit(struct ublk_dev *dev)
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{
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int i;
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for (i = 1; i < dev->nr_fds; i++) {
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fsync(dev->fds[i]);
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close(dev->fds[i]);
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}
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}
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int backing_file_tgt_init(struct ublk_dev *dev)
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{
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int fd, i;
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assert(dev->nr_fds == 1);
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for (i = 0; i < dev->tgt.nr_backing_files; i++) {
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char *file = dev->tgt.backing_file[i];
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unsigned long bytes;
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struct stat st;
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ublk_dbg(UBLK_DBG_DEV, "%s: file %d: %s\n", __func__, i, file);
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fd = open(file, O_RDWR | O_DIRECT);
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if (fd < 0) {
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ublk_err("%s: backing file %s can't be opened: %s\n",
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__func__, file, strerror(errno));
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return -EBADF;
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}
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if (fstat(fd, &st) < 0) {
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close(fd);
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return -EBADF;
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}
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if (S_ISREG(st.st_mode))
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bytes = st.st_size;
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else if (S_ISBLK(st.st_mode)) {
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if (ioctl(fd, BLKGETSIZE64, &bytes) != 0)
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return -1;
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} else {
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return -EINVAL;
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}
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dev->tgt.backing_file_size[i] = bytes;
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dev->fds[dev->nr_fds] = fd;
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dev->nr_fds += 1;
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}
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return 0;
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}
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