From: Pierre Labat <plabat@xxxxxxxxxx>
Allow sequential read to start anywhere in a zone (option
offset), and have a span smaller than a zone (option size).
A use case is a Key Value Store reading a set of keys or values
starting somewhere in a zone.
Signed-off-by: Pierre Labat <plabat@xxxxxxxxxx>
---
zbd.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/zbd.c b/zbd.c
index 8dc3c39..f1f7c5c 100644
--- a/zbd.c
+++ b/zbd.c
@@ -262,7 +262,8 @@ static bool zbd_verify_sizes(void)
zone_idx = zbd_zone_idx(f, f->file_offset);
z = &f->zbd_info->zone_info[zone_idx];
- if (f->file_offset != z->start) {
+ if ((f->file_offset != z->start) &&
+ (td->o.td_ddir != TD_DDIR_READ)) {
new_offset = (z+1)->start;
if (new_offset >= f->file_offset + f->io_size) {
log_info("%s: io_size must be at least one zone\n",
@@ -278,7 +279,8 @@ static bool zbd_verify_sizes(void)
zone_idx = zbd_zone_idx(f, f->file_offset + f->io_size);
z = &f->zbd_info->zone_info[zone_idx];
new_end = z->start;
- if (f->file_offset + f->io_size != new_end) {
+ if ((td->o.td_ddir != TD_DDIR_READ) &&
+ (f->file_offset + f->io_size != new_end)) {
if (new_end <= f->file_offset) {
log_info("%s: io_size must be at least one zone\n",
f->file_name);
--
2.9.5
