}
#endif
-static int qemu_gluster_create(const char *filename,
- QemuOpts *opts, Error **errp)
+static int qemu_gluster_do_truncate(struct glfs_fd *fd, int64_t offset,
+ PreallocMode prealloc, Error **errp)
+{
+ int64_t current_length;
+
+ current_length = glfs_lseek(fd, 0, SEEK_END);
+ if (current_length < 0) {
+ error_setg_errno(errp, errno, "Failed to determine current size");
+ return -errno;
+ }
+
+ if (current_length > offset && prealloc != PREALLOC_MODE_OFF) {
+ error_setg(errp, "Cannot use preallocation for shrinking files");
+ return -ENOTSUP;
+ }
+
+ if (current_length == offset) {
+ return 0;
+ }
+
+ switch (prealloc) {
+#ifdef CONFIG_GLUSTERFS_FALLOCATE
+ case PREALLOC_MODE_FALLOC:
+ if (glfs_fallocate(fd, 0, current_length, offset - current_length)) {
+ error_setg_errno(errp, errno, "Could not preallocate data");
+ return -errno;
+ }
+ break;
+#endif /* CONFIG_GLUSTERFS_FALLOCATE */
+#ifdef CONFIG_GLUSTERFS_ZEROFILL
+ case PREALLOC_MODE_FULL:
+ if (glfs_ftruncate(fd, offset)) {
+ error_setg_errno(errp, errno, "Could not resize file");
+ return -errno;
+ }
+ if (glfs_zerofill(fd, current_length, offset - current_length)) {
+ error_setg_errno(errp, errno, "Could not zerofill the new area");
+ return -errno;
+ }
+ break;
+#endif /* CONFIG_GLUSTERFS_ZEROFILL */
+ case PREALLOC_MODE_OFF:
+ if (glfs_ftruncate(fd, offset)) {
+ error_setg_errno(errp, errno, "Could not resize file");
+ return -errno;
+ }
+ break;
+ default:
+ error_setg(errp, "Unsupported preallocation mode: %s",
+ PreallocMode_str(prealloc));
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int coroutine_fn qemu_gluster_co_create_opts(const char *filename,
+ QemuOpts *opts,
+ Error **errp)
{
BlockdevOptionsGluster *gconf;
struct glfs *glfs;
- struct glfs_fd *fd;
+ struct glfs_fd *fd = NULL;
int ret = 0;
PreallocMode prealloc;
int64_t total_size = 0;
goto out;
}
- switch (prealloc) {
-#ifdef CONFIG_GLUSTERFS_FALLOCATE
- case PREALLOC_MODE_FALLOC:
- if (glfs_fallocate(fd, 0, 0, total_size)) {
- error_setg(errp, "Could not preallocate data for the new file");
- ret = -errno;
- }
- break;
-#endif /* CONFIG_GLUSTERFS_FALLOCATE */
-#ifdef CONFIG_GLUSTERFS_ZEROFILL
- case PREALLOC_MODE_FULL:
- if (!glfs_ftruncate(fd, total_size)) {
- if (glfs_zerofill(fd, 0, total_size)) {
- error_setg(errp, "Could not zerofill the new file");
- ret = -errno;
- }
- } else {
- error_setg(errp, "Could not resize file");
- ret = -errno;
- }
- break;
-#endif /* CONFIG_GLUSTERFS_ZEROFILL */
- case PREALLOC_MODE_OFF:
- if (glfs_ftruncate(fd, total_size) != 0) {
+ ret = qemu_gluster_do_truncate(fd, total_size, prealloc, errp);
+
+out:
+ if (fd) {
+ if (glfs_close(fd) != 0 && ret == 0) {
ret = -errno;
- error_setg(errp, "Could not resize file");
}
- break;
- default:
- ret = -EINVAL;
- error_setg(errp, "Unsupported preallocation mode: %s",
- PreallocMode_str(prealloc));
- break;
- }
-
- if (glfs_close(fd) != 0) {
- ret = -errno;
}
-out:
qapi_free_BlockdevOptionsGluster(gconf);
glfs_clear_preopened(glfs);
return ret;
static int qemu_gluster_truncate(BlockDriverState *bs, int64_t offset,
PreallocMode prealloc, Error **errp)
{
- int ret;
BDRVGlusterState *s = bs->opaque;
-
- if (prealloc != PREALLOC_MODE_OFF) {
- error_setg(errp, "Unsupported preallocation mode '%s'",
- PreallocMode_str(prealloc));
- return -ENOTSUP;
- }
-
- ret = glfs_ftruncate(s->fd, offset);
- if (ret < 0) {
- ret = -errno;
- error_setg_errno(errp, -ret, "Failed to truncate file");
- return ret;
- }
-
- return 0;
+ return qemu_gluster_do_truncate(s->fd, offset, prealloc, errp);
}
static coroutine_fn int qemu_gluster_co_readv(BlockDriverState *bs,
}
/*
- * Returns the allocation status of the specified sectors.
+ * Returns the allocation status of the specified offset.
*
- * If 'sector_num' is beyond the end of the disk image the return value is 0
- * and 'pnum' is set to 0.
+ * The block layer guarantees 'offset' and 'bytes' are within bounds.
*
- * 'pnum' is set to the number of sectors (including and immediately following
- * the specified sector) that are known to be in the same
+ * 'pnum' is set to the number of bytes (including and immediately following
+ * the specified offset) that are known to be in the same
* allocated/unallocated state.
*
- * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
- * beyond the end of the disk image it will be clamped.
+ * 'bytes' is the max value 'pnum' should be set to.
*
- * (Based on raw_co_get_block_status() from file-posix.c.)
+ * (Based on raw_co_block_status() from file-posix.c.)
*/
-static int64_t coroutine_fn qemu_gluster_co_get_block_status(
- BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum,
- BlockDriverState **file)
+static int coroutine_fn qemu_gluster_co_block_status(BlockDriverState *bs,
+ bool want_zero,
+ int64_t offset,
+ int64_t bytes,
+ int64_t *pnum,
+ int64_t *map,
+ BlockDriverState **file)
{
BDRVGlusterState *s = bs->opaque;
- off_t start, data = 0, hole = 0;
- int64_t total_size;
+ off_t data = 0, hole = 0;
int ret = -EINVAL;
if (!s->fd) {
return ret;
}
- start = sector_num * BDRV_SECTOR_SIZE;
- total_size = bdrv_getlength(bs);
- if (total_size < 0) {
- return total_size;
- } else if (start >= total_size) {
- *pnum = 0;
- return 0;
- } else if (start + nb_sectors * BDRV_SECTOR_SIZE > total_size) {
- nb_sectors = DIV_ROUND_UP(total_size - start, BDRV_SECTOR_SIZE);
+ if (!want_zero) {
+ *pnum = bytes;
+ *map = offset;
+ *file = bs;
+ return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
}
- ret = find_allocation(bs, start, &data, &hole);
+ ret = find_allocation(bs, offset, &data, &hole);
if (ret == -ENXIO) {
/* Trailing hole */
- *pnum = nb_sectors;
+ *pnum = bytes;
ret = BDRV_BLOCK_ZERO;
} else if (ret < 0) {
/* No info available, so pretend there are no holes */
- *pnum = nb_sectors;
+ *pnum = bytes;
ret = BDRV_BLOCK_DATA;
- } else if (data == start) {
- /* On a data extent, compute sectors to the end of the extent,
+ } else if (data == offset) {
+ /* On a data extent, compute bytes to the end of the extent,
* possibly including a partial sector at EOF. */
- *pnum = MIN(nb_sectors, DIV_ROUND_UP(hole - start, BDRV_SECTOR_SIZE));
+ *pnum = MIN(bytes, hole - offset);
ret = BDRV_BLOCK_DATA;
} else {
- /* On a hole, compute sectors to the beginning of the next extent. */
- assert(hole == start);
- *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE);
+ /* On a hole, compute bytes to the beginning of the next extent. */
+ assert(hole == offset);
+ *pnum = MIN(bytes, data - offset);
ret = BDRV_BLOCK_ZERO;
}
+ *map = offset;
*file = bs;
- return ret | BDRV_BLOCK_OFFSET_VALID | start;
+ return ret | BDRV_BLOCK_OFFSET_VALID;
}
.bdrv_reopen_commit = qemu_gluster_reopen_commit,
.bdrv_reopen_abort = qemu_gluster_reopen_abort,
.bdrv_close = qemu_gluster_close,
- .bdrv_create = qemu_gluster_create,
+ .bdrv_co_create_opts = qemu_gluster_co_create_opts,
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
#ifdef CONFIG_GLUSTERFS_ZEROFILL
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
- .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
+ .bdrv_co_block_status = qemu_gluster_co_block_status,
.create_opts = &qemu_gluster_create_opts,
};
.bdrv_reopen_commit = qemu_gluster_reopen_commit,
.bdrv_reopen_abort = qemu_gluster_reopen_abort,
.bdrv_close = qemu_gluster_close,
- .bdrv_create = qemu_gluster_create,
+ .bdrv_co_create_opts = qemu_gluster_co_create_opts,
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
#ifdef CONFIG_GLUSTERFS_ZEROFILL
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
- .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
+ .bdrv_co_block_status = qemu_gluster_co_block_status,
.create_opts = &qemu_gluster_create_opts,
};
.bdrv_reopen_commit = qemu_gluster_reopen_commit,
.bdrv_reopen_abort = qemu_gluster_reopen_abort,
.bdrv_close = qemu_gluster_close,
- .bdrv_create = qemu_gluster_create,
+ .bdrv_co_create_opts = qemu_gluster_co_create_opts,
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
#ifdef CONFIG_GLUSTERFS_ZEROFILL
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
- .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
+ .bdrv_co_block_status = qemu_gluster_co_block_status,
.create_opts = &qemu_gluster_create_opts,
};
.bdrv_reopen_commit = qemu_gluster_reopen_commit,
.bdrv_reopen_abort = qemu_gluster_reopen_abort,
.bdrv_close = qemu_gluster_close,
- .bdrv_create = qemu_gluster_create,
+ .bdrv_co_create_opts = qemu_gluster_co_create_opts,
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
#ifdef CONFIG_GLUSTERFS_ZEROFILL
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
- .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
+ .bdrv_co_block_status = qemu_gluster_co_block_status,
.create_opts = &qemu_gluster_create_opts,
};
projects / mirror_qemu.git / blobdiff