#define RBD_FEATURE_LAYERING (1ULL<<0)
#define RBD_FEATURE_STRIPINGV2 (1ULL<<1)
#define RBD_FEATURE_EXCLUSIVE_LOCK (1ULL<<2)
+#define RBD_FEATURE_DEEP_FLATTEN (1ULL<<5)
#define RBD_FEATURE_DATA_POOL (1ULL<<7)
#define RBD_FEATURE_OPERATIONS (1ULL<<8)
#define RBD_FEATURES_ALL (RBD_FEATURE_LAYERING | \
RBD_FEATURE_STRIPINGV2 | \
RBD_FEATURE_EXCLUSIVE_LOCK | \
+ RBD_FEATURE_DEEP_FLATTEN | \
RBD_FEATURE_DATA_POOL | \
RBD_FEATURE_OPERATIONS)
OBJ_OP_READ = 1,
OBJ_OP_WRITE,
OBJ_OP_DISCARD,
+ OBJ_OP_ZEROOUT,
};
/*
* Writes go through the following state machine to deal with
* layering:
*
- * need copyup
- * RBD_OBJ_WRITE_GUARD ---------------> RBD_OBJ_WRITE_COPYUP
- * | ^ |
- * v \------------------------------/
- * done
- * ^
- * |
- * RBD_OBJ_WRITE_FLAT
+ * . . . . . RBD_OBJ_WRITE_GUARD. . . . . . . . . . . . . .
+ * . | .
+ * . v .
+ * . RBD_OBJ_WRITE_READ_FROM_PARENT. . . .
+ * . | . .
+ * . v v (deep-copyup .
+ * (image . RBD_OBJ_WRITE_COPYUP_EMPTY_SNAPC . not needed) .
+ * flattened) v | . .
+ * . v . .
+ * . . . .RBD_OBJ_WRITE_COPYUP_OPS. . . . . (copyup .
+ * | not needed) v
+ * v .
+ * done . . . . . . . . . . . . . . . . . .
+ * ^
+ * |
+ * RBD_OBJ_WRITE_FLAT
*
* Writes start in RBD_OBJ_WRITE_GUARD or _FLAT, depending on whether
- * there is a parent or not.
+ * assert_exists guard is needed or not (in some cases it's not needed
+ * even if there is a parent).
*/
enum rbd_obj_write_state {
RBD_OBJ_WRITE_FLAT = 1,
RBD_OBJ_WRITE_GUARD,
- RBD_OBJ_WRITE_COPYUP,
+ RBD_OBJ_WRITE_READ_FROM_PARENT,
+ RBD_OBJ_WRITE_COPYUP_EMPTY_SNAPC,
+ RBD_OBJ_WRITE_COPYUP_OPS,
};
struct rbd_obj_request {
int result; /* first nonzero obj_request result */
struct list_head object_extents; /* obj_req.ex structs */
- u32 obj_request_count;
u32 pending_count;
struct kref kref;
static struct workqueue_struct *rbd_wq;
+static struct ceph_snap_context rbd_empty_snapc = {
+ .nref = REFCOUNT_INIT(1),
+};
+
/*
* single-major requires >= 0.75 version of userspace rbd utility.
*/
module_param(single_major, bool, 0444);
MODULE_PARM_DESC(single_major, "Use a single major number for all rbd devices (default: true)");
-static ssize_t rbd_add(struct bus_type *bus, const char *buf,
- size_t count);
-static ssize_t rbd_remove(struct bus_type *bus, const char *buf,
- size_t count);
-static ssize_t rbd_add_single_major(struct bus_type *bus, const char *buf,
- size_t count);
-static ssize_t rbd_remove_single_major(struct bus_type *bus, const char *buf,
- size_t count);
+static ssize_t add_store(struct bus_type *bus, const char *buf, size_t count);
+static ssize_t remove_store(struct bus_type *bus, const char *buf,
+ size_t count);
+static ssize_t add_single_major_store(struct bus_type *bus, const char *buf,
+ size_t count);
+static ssize_t remove_single_major_store(struct bus_type *bus, const char *buf,
+ size_t count);
static int rbd_dev_image_probe(struct rbd_device *rbd_dev, int depth);
static int rbd_dev_id_to_minor(int dev_id)
return is_lock_owner;
}
-static ssize_t rbd_supported_features_show(struct bus_type *bus, char *buf)
+static ssize_t supported_features_show(struct bus_type *bus, char *buf)
{
return sprintf(buf, "0x%llx\n", RBD_FEATURES_SUPPORTED);
}
-static BUS_ATTR(add, 0200, NULL, rbd_add);
-static BUS_ATTR(remove, 0200, NULL, rbd_remove);
-static BUS_ATTR(add_single_major, 0200, NULL, rbd_add_single_major);
-static BUS_ATTR(remove_single_major, 0200, NULL, rbd_remove_single_major);
-static BUS_ATTR(supported_features, 0444, rbd_supported_features_show, NULL);
+static BUS_ATTR_WO(add);
+static BUS_ATTR_WO(remove);
+static BUS_ATTR_WO(add_single_major);
+static BUS_ATTR_WO(remove_single_major);
+static BUS_ATTR_RO(supported_features);
static struct attribute *rbd_bus_attrs[] = {
&bus_attr_add.attr,
*/
enum {
Opt_queue_depth,
+ Opt_alloc_size,
Opt_lock_timeout,
Opt_last_int,
/* int args above */
static match_table_t rbd_opts_tokens = {
{Opt_queue_depth, "queue_depth=%d"},
+ {Opt_alloc_size, "alloc_size=%d"},
{Opt_lock_timeout, "lock_timeout=%d"},
/* int args above */
{Opt_pool_ns, "_pool_ns=%s"},
struct rbd_options {
int queue_depth;
+ int alloc_size;
unsigned long lock_timeout;
bool read_only;
bool lock_on_read;
};
#define RBD_QUEUE_DEPTH_DEFAULT BLKDEV_MAX_RQ
+#define RBD_ALLOC_SIZE_DEFAULT (64 * 1024)
#define RBD_LOCK_TIMEOUT_DEFAULT 0 /* no timeout */
#define RBD_READ_ONLY_DEFAULT false
#define RBD_LOCK_ON_READ_DEFAULT false
}
pctx->opts->queue_depth = intval;
break;
+ case Opt_alloc_size:
+ if (intval < 1) {
+ pr_err("alloc_size out of range\n");
+ return -EINVAL;
+ }
+ if (!is_power_of_2(intval)) {
+ pr_err("alloc_size must be a power of 2\n");
+ return -EINVAL;
+ }
+ pctx->opts->alloc_size = intval;
+ break;
case Opt_lock_timeout:
/* 0 is "wait forever" (i.e. infinite timeout) */
if (intval < 0 || intval > INT_MAX / 1000) {
return "write";
case OBJ_OP_DISCARD:
return "discard";
+ case OBJ_OP_ZEROOUT:
+ return "zeroout";
default:
return "???";
}
/* Image request now owns object's original reference */
obj_request->img_request = img_request;
- img_request->obj_request_count++;
img_request->pending_count++;
dout("%s: img %p obj %p\n", __func__, img_request, obj_request);
}
{
dout("%s: img %p obj %p\n", __func__, img_request, obj_request);
list_del(&obj_request->ex.oe_item);
- rbd_assert(img_request->obj_request_count > 0);
- img_request->obj_request_count--;
rbd_assert(obj_request->img_request == img_request);
rbd_obj_request_put(obj_request);
}
rbd_dev->layout.object_size;
}
+/*
+ * Must be called after rbd_obj_calc_img_extents().
+ */
+static bool rbd_obj_copyup_enabled(struct rbd_obj_request *obj_req)
+{
+ if (!obj_req->num_img_extents ||
+ (rbd_obj_is_entire(obj_req) &&
+ !obj_req->img_request->snapc->num_snaps))
+ return false;
+
+ return true;
+}
+
static u64 rbd_obj_img_extents_bytes(struct rbd_obj_request *obj_req)
{
return ceph_file_extents_bytes(obj_req->img_extents,
return false;
case OBJ_OP_WRITE:
case OBJ_OP_DISCARD:
+ case OBJ_OP_ZEROOUT:
return true;
default:
BUG();
}
static struct ceph_osd_request *
-rbd_osd_req_create(struct rbd_obj_request *obj_req, unsigned int num_ops)
+__rbd_osd_req_create(struct rbd_obj_request *obj_req,
+ struct ceph_snap_context *snapc, unsigned int num_ops)
{
- struct rbd_img_request *img_req = obj_req->img_request;
- struct rbd_device *rbd_dev = img_req->rbd_dev;
+ struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev;
struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
struct ceph_osd_request *req;
const char *name_format = rbd_dev->image_format == 1 ?
RBD_V1_DATA_FORMAT : RBD_V2_DATA_FORMAT;
- req = ceph_osdc_alloc_request(osdc,
- (rbd_img_is_write(img_req) ? img_req->snapc : NULL),
- num_ops, false, GFP_NOIO);
+ req = ceph_osdc_alloc_request(osdc, snapc, num_ops, false, GFP_NOIO);
if (!req)
return NULL;
return NULL;
}
+static struct ceph_osd_request *
+rbd_osd_req_create(struct rbd_obj_request *obj_req, unsigned int num_ops)
+{
+ return __rbd_osd_req_create(obj_req, obj_req->img_request->snapc,
+ num_ops);
+}
+
static void rbd_osd_req_destroy(struct ceph_osd_request *osd_req)
{
ceph_osdc_put_request(osd_req);
for_each_obj_request_safe(img_request, obj_request, next_obj_request)
rbd_img_obj_request_del(img_request, obj_request);
- rbd_assert(img_request->obj_request_count == 0);
if (img_request_layered_test(img_request)) {
img_request_layered_clear(img_request);
static int rbd_obj_setup_read(struct rbd_obj_request *obj_req)
{
- obj_req->osd_req = rbd_osd_req_create(obj_req, 1);
+ obj_req->osd_req = __rbd_osd_req_create(obj_req, NULL, 1);
if (!obj_req->osd_req)
return -ENOMEM;
return 0;
}
+static int count_write_ops(struct rbd_obj_request *obj_req)
+{
+ return 2; /* setallochint + write/writefull */
+}
+
static void __rbd_obj_setup_write(struct rbd_obj_request *obj_req,
unsigned int which)
{
static int rbd_obj_setup_write(struct rbd_obj_request *obj_req)
{
unsigned int num_osd_ops, which = 0;
+ bool need_guard;
int ret;
/* reverse map the entire object onto the parent */
if (ret)
return ret;
- if (obj_req->num_img_extents) {
- obj_req->write_state = RBD_OBJ_WRITE_GUARD;
- num_osd_ops = 3; /* stat + setallochint + write/writefull */
- } else {
- obj_req->write_state = RBD_OBJ_WRITE_FLAT;
- num_osd_ops = 2; /* setallochint + write/writefull */
- }
+ need_guard = rbd_obj_copyup_enabled(obj_req);
+ num_osd_ops = need_guard + count_write_ops(obj_req);
obj_req->osd_req = rbd_osd_req_create(obj_req, num_osd_ops);
if (!obj_req->osd_req)
return -ENOMEM;
- if (obj_req->num_img_extents) {
+ if (need_guard) {
ret = __rbd_obj_setup_stat(obj_req, which++);
if (ret)
return ret;
+
+ obj_req->write_state = RBD_OBJ_WRITE_GUARD;
+ } else {
+ obj_req->write_state = RBD_OBJ_WRITE_FLAT;
}
__rbd_obj_setup_write(obj_req, which);
return 0;
}
-static void __rbd_obj_setup_discard(struct rbd_obj_request *obj_req,
+static u16 truncate_or_zero_opcode(struct rbd_obj_request *obj_req)
+{
+ return rbd_obj_is_tail(obj_req) ? CEPH_OSD_OP_TRUNCATE :
+ CEPH_OSD_OP_ZERO;
+}
+
+static int rbd_obj_setup_discard(struct rbd_obj_request *obj_req)
+{
+ struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev;
+ u64 off = obj_req->ex.oe_off;
+ u64 next_off = obj_req->ex.oe_off + obj_req->ex.oe_len;
+ int ret;
+
+ /*
+ * Align the range to alloc_size boundary and punt on discards
+ * that are too small to free up any space.
+ *
+ * alloc_size == object_size && is_tail() is a special case for
+ * filestore with filestore_punch_hole = false, needed to allow
+ * truncate (in addition to delete).
+ */
+ if (rbd_dev->opts->alloc_size != rbd_dev->layout.object_size ||
+ !rbd_obj_is_tail(obj_req)) {
+ off = round_up(off, rbd_dev->opts->alloc_size);
+ next_off = round_down(next_off, rbd_dev->opts->alloc_size);
+ if (off >= next_off)
+ return 1;
+ }
+
+ /* reverse map the entire object onto the parent */
+ ret = rbd_obj_calc_img_extents(obj_req, true);
+ if (ret)
+ return ret;
+
+ obj_req->osd_req = rbd_osd_req_create(obj_req, 1);
+ if (!obj_req->osd_req)
+ return -ENOMEM;
+
+ if (rbd_obj_is_entire(obj_req) && !obj_req->num_img_extents) {
+ osd_req_op_init(obj_req->osd_req, 0, CEPH_OSD_OP_DELETE, 0);
+ } else {
+ dout("%s %p %llu~%llu -> %llu~%llu\n", __func__,
+ obj_req, obj_req->ex.oe_off, obj_req->ex.oe_len,
+ off, next_off - off);
+ osd_req_op_extent_init(obj_req->osd_req, 0,
+ truncate_or_zero_opcode(obj_req),
+ off, next_off - off, 0, 0);
+ }
+
+ obj_req->write_state = RBD_OBJ_WRITE_FLAT;
+ rbd_osd_req_format_write(obj_req);
+ return 0;
+}
+
+static int count_zeroout_ops(struct rbd_obj_request *obj_req)
+{
+ int num_osd_ops;
+
+ if (rbd_obj_is_entire(obj_req) && obj_req->num_img_extents &&
+ !rbd_obj_copyup_enabled(obj_req))
+ num_osd_ops = 2; /* create + truncate */
+ else
+ num_osd_ops = 1; /* delete/truncate/zero */
+
+ return num_osd_ops;
+}
+
+static void __rbd_obj_setup_zeroout(struct rbd_obj_request *obj_req,
unsigned int which)
{
u16 opcode;
if (rbd_obj_is_entire(obj_req)) {
if (obj_req->num_img_extents) {
- osd_req_op_init(obj_req->osd_req, which++,
- CEPH_OSD_OP_CREATE, 0);
+ if (!rbd_obj_copyup_enabled(obj_req))
+ osd_req_op_init(obj_req->osd_req, which++,
+ CEPH_OSD_OP_CREATE, 0);
opcode = CEPH_OSD_OP_TRUNCATE;
} else {
osd_req_op_init(obj_req->osd_req, which++,
CEPH_OSD_OP_DELETE, 0);
opcode = 0;
}
- } else if (rbd_obj_is_tail(obj_req)) {
- opcode = CEPH_OSD_OP_TRUNCATE;
} else {
- opcode = CEPH_OSD_OP_ZERO;
+ opcode = truncate_or_zero_opcode(obj_req);
}
if (opcode)
rbd_osd_req_format_write(obj_req);
}
-static int rbd_obj_setup_discard(struct rbd_obj_request *obj_req)
+static int rbd_obj_setup_zeroout(struct rbd_obj_request *obj_req)
{
unsigned int num_osd_ops, which = 0;
+ bool need_guard;
int ret;
/* reverse map the entire object onto the parent */
if (ret)
return ret;
- if (rbd_obj_is_entire(obj_req)) {
- obj_req->write_state = RBD_OBJ_WRITE_FLAT;
- if (obj_req->num_img_extents)
- num_osd_ops = 2; /* create + truncate */
- else
- num_osd_ops = 1; /* delete */
- } else {
- if (obj_req->num_img_extents) {
- obj_req->write_state = RBD_OBJ_WRITE_GUARD;
- num_osd_ops = 2; /* stat + truncate/zero */
- } else {
- obj_req->write_state = RBD_OBJ_WRITE_FLAT;
- num_osd_ops = 1; /* truncate/zero */
- }
- }
+ need_guard = rbd_obj_copyup_enabled(obj_req);
+ num_osd_ops = need_guard + count_zeroout_ops(obj_req);
obj_req->osd_req = rbd_osd_req_create(obj_req, num_osd_ops);
if (!obj_req->osd_req)
return -ENOMEM;
- if (!rbd_obj_is_entire(obj_req) && obj_req->num_img_extents) {
+ if (need_guard) {
ret = __rbd_obj_setup_stat(obj_req, which++);
if (ret)
return ret;
+
+ obj_req->write_state = RBD_OBJ_WRITE_GUARD;
+ } else {
+ obj_req->write_state = RBD_OBJ_WRITE_FLAT;
}
- __rbd_obj_setup_discard(obj_req, which);
+ __rbd_obj_setup_zeroout(obj_req, which);
return 0;
}
*/
static int __rbd_img_fill_request(struct rbd_img_request *img_req)
{
- struct rbd_obj_request *obj_req;
+ struct rbd_obj_request *obj_req, *next_obj_req;
int ret;
- for_each_obj_request(img_req, obj_req) {
+ for_each_obj_request_safe(img_req, obj_req, next_obj_req) {
switch (img_req->op_type) {
case OBJ_OP_READ:
ret = rbd_obj_setup_read(obj_req);
case OBJ_OP_DISCARD:
ret = rbd_obj_setup_discard(obj_req);
break;
+ case OBJ_OP_ZEROOUT:
+ ret = rbd_obj_setup_zeroout(obj_req);
+ break;
default:
rbd_assert(0);
}
- if (ret)
+ if (ret < 0)
return ret;
+ if (ret > 0) {
+ img_req->xferred += obj_req->ex.oe_len;
+ img_req->pending_count--;
+ rbd_img_obj_request_del(img_req, obj_req);
+ continue;
+ }
ret = ceph_osdc_alloc_messages(obj_req->osd_req, GFP_NOIO);
if (ret)
return true;
}
-static int rbd_obj_issue_copyup(struct rbd_obj_request *obj_req, u32 bytes)
+#define MODS_ONLY U32_MAX
+
+static int rbd_obj_issue_copyup_empty_snapc(struct rbd_obj_request *obj_req,
+ u32 bytes)
{
- unsigned int num_osd_ops = obj_req->osd_req->r_num_ops;
int ret;
dout("%s obj_req %p bytes %u\n", __func__, obj_req, bytes);
rbd_assert(obj_req->osd_req->r_ops[0].op == CEPH_OSD_OP_STAT);
+ rbd_assert(bytes > 0 && bytes != MODS_ONLY);
rbd_osd_req_destroy(obj_req->osd_req);
- /*
- * Create a copyup request with the same number of OSD ops as
- * the original request. The original request was stat + op(s),
- * the new copyup request will be copyup + the same op(s).
- */
- obj_req->osd_req = rbd_osd_req_create(obj_req, num_osd_ops);
+ obj_req->osd_req = __rbd_osd_req_create(obj_req, &rbd_empty_snapc, 1);
if (!obj_req->osd_req)
return -ENOMEM;
if (ret)
return ret;
- /*
- * Only send non-zero copyup data to save some I/O and network
- * bandwidth -- zero copyup data is equivalent to the object not
- * existing.
- */
- if (is_zero_bvecs(obj_req->copyup_bvecs, bytes)) {
- dout("%s obj_req %p detected zeroes\n", __func__, obj_req);
- bytes = 0;
- }
osd_req_op_cls_request_data_bvecs(obj_req->osd_req, 0,
obj_req->copyup_bvecs,
obj_req->copyup_bvec_count,
bytes);
+ rbd_osd_req_format_write(obj_req);
- switch (obj_req->img_request->op_type) {
+ ret = ceph_osdc_alloc_messages(obj_req->osd_req, GFP_NOIO);
+ if (ret)
+ return ret;
+
+ rbd_obj_request_submit(obj_req);
+ return 0;
+}
+
+static int rbd_obj_issue_copyup_ops(struct rbd_obj_request *obj_req, u32 bytes)
+{
+ struct rbd_img_request *img_req = obj_req->img_request;
+ unsigned int num_osd_ops = (bytes != MODS_ONLY);
+ unsigned int which = 0;
+ int ret;
+
+ dout("%s obj_req %p bytes %u\n", __func__, obj_req, bytes);
+ rbd_assert(obj_req->osd_req->r_ops[0].op == CEPH_OSD_OP_STAT ||
+ obj_req->osd_req->r_ops[0].op == CEPH_OSD_OP_CALL);
+ rbd_osd_req_destroy(obj_req->osd_req);
+
+ switch (img_req->op_type) {
case OBJ_OP_WRITE:
- __rbd_obj_setup_write(obj_req, 1);
+ num_osd_ops += count_write_ops(obj_req);
break;
- case OBJ_OP_DISCARD:
- rbd_assert(!rbd_obj_is_entire(obj_req));
- __rbd_obj_setup_discard(obj_req, 1);
+ case OBJ_OP_ZEROOUT:
+ num_osd_ops += count_zeroout_ops(obj_req);
+ break;
+ default:
+ rbd_assert(0);
+ }
+
+ obj_req->osd_req = rbd_osd_req_create(obj_req, num_osd_ops);
+ if (!obj_req->osd_req)
+ return -ENOMEM;
+
+ if (bytes != MODS_ONLY) {
+ ret = osd_req_op_cls_init(obj_req->osd_req, which, "rbd",
+ "copyup");
+ if (ret)
+ return ret;
+
+ osd_req_op_cls_request_data_bvecs(obj_req->osd_req, which++,
+ obj_req->copyup_bvecs,
+ obj_req->copyup_bvec_count,
+ bytes);
+ }
+
+ switch (img_req->op_type) {
+ case OBJ_OP_WRITE:
+ __rbd_obj_setup_write(obj_req, which);
+ break;
+ case OBJ_OP_ZEROOUT:
+ __rbd_obj_setup_zeroout(obj_req, which);
break;
default:
rbd_assert(0);
return 0;
}
+static int rbd_obj_issue_copyup(struct rbd_obj_request *obj_req, u32 bytes)
+{
+ /*
+ * Only send non-zero copyup data to save some I/O and network
+ * bandwidth -- zero copyup data is equivalent to the object not
+ * existing.
+ */
+ if (is_zero_bvecs(obj_req->copyup_bvecs, bytes)) {
+ dout("%s obj_req %p detected zeroes\n", __func__, obj_req);
+ bytes = 0;
+ }
+
+ if (obj_req->img_request->snapc->num_snaps && bytes > 0) {
+ /*
+ * Send a copyup request with an empty snapshot context to
+ * deep-copyup the object through all existing snapshots.
+ * A second request with the current snapshot context will be
+ * sent for the actual modification.
+ */
+ obj_req->write_state = RBD_OBJ_WRITE_COPYUP_EMPTY_SNAPC;
+ return rbd_obj_issue_copyup_empty_snapc(obj_req, bytes);
+ }
+
+ obj_req->write_state = RBD_OBJ_WRITE_COPYUP_OPS;
+ return rbd_obj_issue_copyup_ops(obj_req, bytes);
+}
+
static int setup_copyup_bvecs(struct rbd_obj_request *obj_req, u64 obj_overlap)
{
u32 i;
if (!obj_req->num_img_extents) {
/*
* The overlap has become 0 (most likely because the
- * image has been flattened). Use rbd_obj_issue_copyup()
- * to re-submit the original write request -- the copyup
- * operation itself will be a no-op, since someone must
- * have populated the child object while we weren't
- * looking. Move to WRITE_FLAT state as we'll be done
- * with the operation once the null copyup completes.
+ * image has been flattened). Re-submit the original write
+ * request -- pass MODS_ONLY since the copyup isn't needed
+ * anymore.
*/
- obj_req->write_state = RBD_OBJ_WRITE_FLAT;
- return rbd_obj_issue_copyup(obj_req, 0);
+ obj_req->write_state = RBD_OBJ_WRITE_COPYUP_OPS;
+ return rbd_obj_issue_copyup_ops(obj_req, MODS_ONLY);
}
ret = setup_copyup_bvecs(obj_req, rbd_obj_img_extents_bytes(obj_req));
if (ret)
return ret;
- obj_req->write_state = RBD_OBJ_WRITE_COPYUP;
+ obj_req->write_state = RBD_OBJ_WRITE_READ_FROM_PARENT;
return rbd_obj_read_from_parent(obj_req);
}
{
int ret;
-again:
switch (obj_req->write_state) {
case RBD_OBJ_WRITE_GUARD:
rbd_assert(!obj_req->xferred);
}
/* fall through */
case RBD_OBJ_WRITE_FLAT:
+ case RBD_OBJ_WRITE_COPYUP_OPS:
if (!obj_req->result)
/*
* There is no such thing as a successful short
*/
obj_req->xferred = obj_req->ex.oe_len;
return true;
- case RBD_OBJ_WRITE_COPYUP:
- obj_req->write_state = RBD_OBJ_WRITE_GUARD;
+ case RBD_OBJ_WRITE_READ_FROM_PARENT:
if (obj_req->result)
- goto again;
+ return true;
rbd_assert(obj_req->xferred);
ret = rbd_obj_issue_copyup(obj_req, obj_req->xferred);
+ if (ret) {
+ obj_req->result = ret;
+ obj_req->xferred = 0;
+ return true;
+ }
+ return false;
+ case RBD_OBJ_WRITE_COPYUP_EMPTY_SNAPC:
+ if (obj_req->result)
+ return true;
+
+ obj_req->write_state = RBD_OBJ_WRITE_COPYUP_OPS;
+ ret = rbd_obj_issue_copyup_ops(obj_req, MODS_ONLY);
if (ret) {
obj_req->result = ret;
return true;
case OBJ_OP_WRITE:
return rbd_obj_handle_write(obj_req);
case OBJ_OP_DISCARD:
+ case OBJ_OP_ZEROOUT:
if (rbd_obj_handle_write(obj_req)) {
/*
* Hide -ENOENT from delete/truncate/zero -- discarding
switch (req_op(rq)) {
case REQ_OP_DISCARD:
- case REQ_OP_WRITE_ZEROES:
op_type = OBJ_OP_DISCARD;
break;
+ case REQ_OP_WRITE_ZEROES:
+ op_type = OBJ_OP_ZEROOUT;
+ break;
case REQ_OP_WRITE:
op_type = OBJ_OP_WRITE;
break;
img_request->rq = rq;
snapc = NULL; /* img_request consumes a ref */
- if (op_type == OBJ_OP_DISCARD)
+ if (op_type == OBJ_OP_DISCARD || op_type == OBJ_OP_ZEROOUT)
result = rbd_img_fill_nodata(img_request, offset, length);
else
result = rbd_img_fill_from_bio(img_request, offset, length,
rq->bio);
- if (result)
+ if (result || !img_request->pending_count)
goto err_img_request;
rbd_img_request_submit(img_request);
rbd_dev->tag_set.ops = &rbd_mq_ops;
rbd_dev->tag_set.queue_depth = rbd_dev->opts->queue_depth;
rbd_dev->tag_set.numa_node = NUMA_NO_NODE;
- rbd_dev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_SG_MERGE;
+ rbd_dev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
rbd_dev->tag_set.nr_hw_queues = 1;
rbd_dev->tag_set.cmd_size = sizeof(struct work_struct);
pctx.opts->read_only = RBD_READ_ONLY_DEFAULT;
pctx.opts->queue_depth = RBD_QUEUE_DEPTH_DEFAULT;
+ pctx.opts->alloc_size = RBD_ALLOC_SIZE_DEFAULT;
pctx.opts->lock_timeout = RBD_LOCK_TIMEOUT_DEFAULT;
pctx.opts->lock_on_read = RBD_LOCK_ON_READ_DEFAULT;
pctx.opts->exclusive = RBD_EXCLUSIVE_DEFAULT;
ret = rbd_dev_v2_parent_info(rbd_dev);
if (ret)
goto err_out_probe;
-
- /*
- * Need to warn users if this image is the one being
- * mapped and has a parent.
- */
- if (!depth && rbd_dev->parent_spec)
- rbd_warn(rbd_dev,
- "WARNING: kernel layering is EXPERIMENTAL!");
}
ret = rbd_dev_probe_parent(rbd_dev, depth);
if (rbd_dev->spec->snap_id != CEPH_NOSNAP)
rbd_dev->opts->read_only = true;
+ if (rbd_dev->opts->alloc_size > rbd_dev->layout.object_size) {
+ rbd_warn(rbd_dev, "alloc_size adjusted to %u",
+ rbd_dev->layout.object_size);
+ rbd_dev->opts->alloc_size = rbd_dev->layout.object_size;
+ }
+
rc = rbd_dev_device_setup(rbd_dev);
if (rc)
goto err_out_image_probe;
goto out;
}
-static ssize_t rbd_add(struct bus_type *bus,
- const char *buf,
- size_t count)
+static ssize_t add_store(struct bus_type *bus, const char *buf, size_t count)
{
if (single_major)
return -EINVAL;
return do_rbd_add(bus, buf, count);
}
-static ssize_t rbd_add_single_major(struct bus_type *bus,
- const char *buf,
- size_t count)
+static ssize_t add_single_major_store(struct bus_type *bus, const char *buf,
+ size_t count)
{
return do_rbd_add(bus, buf, count);
}
return count;
}
-static ssize_t rbd_remove(struct bus_type *bus,
- const char *buf,
- size_t count)
+static ssize_t remove_store(struct bus_type *bus, const char *buf, size_t count)
{
if (single_major)
return -EINVAL;
return do_rbd_remove(bus, buf, count);
}
-static ssize_t rbd_remove_single_major(struct bus_type *bus,
- const char *buf,
- size_t count)
+static ssize_t remove_single_major_store(struct bus_type *bus, const char *buf,
+ size_t count)
{
return do_rbd_remove(bus, buf, count);
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff