* [Qemu-devel] [PATCH] sheepdog: allow to delete snapshot
@ 2015-12-23 12:22 Hitoshi Mitake
2016-01-13 2:09 ` Hitoshi Mitake
2016-01-19 18:59 ` Jeff Cody
0 siblings, 2 replies; 3+ messages in thread
From: Hitoshi Mitake @ 2015-12-23 12:22 UTC (permalink / raw)
To: qemu-devel; +Cc: Hitoshi Mitake, Jeff Cody, sheepdog, Vasiliy Tolstov
From: Vasiliy Tolstov <v.tolstov@selfip.ru>
This patch implements a blockdriver function bdrv_snapshot_delete() in
the sheepdog driver. With the new function, snapshots of sheepdog can
be deleted from libvirt.
Cc: Jeff Cody <jcody@redhat.com>
Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>
---
block/sheepdog.c | 125 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 123 insertions(+), 2 deletions(-)
diff --git a/block/sheepdog.c b/block/sheepdog.c
index d80e4ed..0a4f2fc 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -283,6 +283,12 @@ static inline bool is_snapshot(struct SheepdogInode *inode)
return !!inode->snap_ctime;
}
+static inline size_t count_data_objs(const struct SheepdogInode *inode)
+{
+ return DIV_ROUND_UP(inode->vdi_size,
+ (1UL << inode->block_size_shift));
+}
+
#undef DPRINTF
#ifdef DEBUG_SDOG
#define DPRINTF(fmt, args...) \
@@ -2479,13 +2485,128 @@ out:
return ret;
}
+#define NR_BATCHED_DISCARD 128
+
+static bool remove_objects(BDRVSheepdogState *s)
+{
+ int fd, i = 0, nr_objs = 0;
+ Error *local_err = NULL;
+ int ret = 0;
+ bool result = true;
+ SheepdogInode *inode = &s->inode;
+
+ fd = connect_to_sdog(s, &local_err);
+ if (fd < 0) {
+ error_report_err(local_err);
+ return false;
+ }
+
+ nr_objs = count_data_objs(inode);
+ while (i < nr_objs) {
+ int start_idx, nr_filled_idx;
+
+ while (i < nr_objs && !inode->data_vdi_id[i]) {
+ i++;
+ }
+ start_idx = i;
+
+ nr_filled_idx = 0;
+ while (i < nr_objs && nr_filled_idx < NR_BATCHED_DISCARD) {
+ if (inode->data_vdi_id[i]) {
+ inode->data_vdi_id[i] = 0;
+ nr_filled_idx++;
+ }
+
+ i++;
+ }
+
+ ret = write_object(fd, s->aio_context,
+ (char *)&inode->data_vdi_id[start_idx],
+ vid_to_vdi_oid(s->inode.vdi_id), inode->nr_copies,
+ (i - start_idx) * sizeof(uint32_t),
+ offsetof(struct SheepdogInode,
+ data_vdi_id[start_idx]),
+ false, s->cache_flags);
+ if (ret < 0) {
+ error_report("failed to discard snapshot inode.");
+ result = false;
+ goto out;
+ }
+ }
+
+out:
+ closesocket(fd);
+ return result;
+}
+
static int sd_snapshot_delete(BlockDriverState *bs,
const char *snapshot_id,
const char *name,
Error **errp)
{
- /* FIXME: Delete specified snapshot id. */
- return 0;
+ uint32_t snap_id = 0;
+ char snap_tag[SD_MAX_VDI_TAG_LEN];
+ Error *local_err = NULL;
+ int fd, ret;
+ char buf[SD_MAX_VDI_LEN + SD_MAX_VDI_TAG_LEN];
+ BDRVSheepdogState *s = bs->opaque;
+ unsigned int wlen = SD_MAX_VDI_LEN + SD_MAX_VDI_TAG_LEN, rlen = 0;
+ uint32_t vid;
+ SheepdogVdiReq hdr = {
+ .opcode = SD_OP_DEL_VDI,
+ .data_length = wlen,
+ .flags = SD_FLAG_CMD_WRITE,
+ };
+ SheepdogVdiRsp *rsp = (SheepdogVdiRsp *)&hdr;
+
+ if (!remove_objects(s)) {
+ return -1;
+ }
+
+ memset(buf, 0, sizeof(buf));
+ memset(snap_tag, 0, sizeof(snap_tag));
+ pstrcpy(buf, SD_MAX_VDI_LEN, s->name);
+ if (qemu_strtoul(snapshot_id, NULL, 10, (unsigned long *)&snap_id)) {
+ return -1;
+ }
+
+ if (snap_id) {
+ hdr.snapid = snap_id;
+ } else {
+ pstrcpy(snap_tag, sizeof(snap_tag), snapshot_id);
+ pstrcpy(buf + SD_MAX_VDI_LEN, SD_MAX_VDI_TAG_LEN, snap_tag);
+ }
+
+ ret = find_vdi_name(s, s->name, snap_id, snap_tag, &vid, true,
+ &local_err);
+ if (ret) {
+ return ret;
+ }
+
+ fd = connect_to_sdog(s, &local_err);
+ if (fd < 0) {
+ error_report_err(local_err);
+ return -1;
+ }
+
+ ret = do_req(fd, s->aio_context, (SheepdogReq *)&hdr,
+ buf, &wlen, &rlen);
+ closesocket(fd);
+ if (ret) {
+ return ret;
+ }
+
+ switch (rsp->result) {
+ case SD_RES_NO_VDI:
+ error_report("%s was already deleted", s->name);
+ case SD_RES_SUCCESS:
+ break;
+ default:
+ error_report("%s, %s", sd_strerror(rsp->result), s->name);
+ return -1;
+ }
+
+ return ret;
}
static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
--
1.9.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] [PATCH] sheepdog: allow to delete snapshot
2015-12-23 12:22 [Qemu-devel] [PATCH] sheepdog: allow to delete snapshot Hitoshi Mitake
@ 2016-01-13 2:09 ` Hitoshi Mitake
2016-01-19 18:59 ` Jeff Cody
1 sibling, 0 replies; 3+ messages in thread
From: Hitoshi Mitake @ 2016-01-13 2:09 UTC (permalink / raw)
To: QEMU Developers; +Cc: Hitoshi Mitake, Jeff Cody, sheepdog, Vasiliy Tolstov
[-- Attachment #1: Type: text/plain, Size: 5091 bytes --]
On Wed, Dec 23, 2015 at 9:22 PM, Hitoshi Mitake <
mitake.hitoshi@lab.ntt.co.jp> wrote:
> From: Vasiliy Tolstov <v.tolstov@selfip.ru>
>
> This patch implements a blockdriver function bdrv_snapshot_delete() in
> the sheepdog driver. With the new function, snapshots of sheepdog can
> be deleted from libvirt.
>
> Cc: Jeff Cody <jcody@redhat.com>
> Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
> Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>
>
ping, Jeff?
Thanks,
Hitoshi
> ---
> block/sheepdog.c | 125
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 123 insertions(+), 2 deletions(-)
>
> diff --git a/block/sheepdog.c b/block/sheepdog.c
> index d80e4ed..0a4f2fc 100644
> --- a/block/sheepdog.c
> +++ b/block/sheepdog.c
> @@ -283,6 +283,12 @@ static inline bool is_snapshot(struct SheepdogInode
> *inode)
> return !!inode->snap_ctime;
> }
>
> +static inline size_t count_data_objs(const struct SheepdogInode *inode)
> +{
> + return DIV_ROUND_UP(inode->vdi_size,
> + (1UL << inode->block_size_shift));
> +}
> +
> #undef DPRINTF
> #ifdef DEBUG_SDOG
> #define DPRINTF(fmt, args...) \
> @@ -2479,13 +2485,128 @@ out:
> return ret;
> }
>
> +#define NR_BATCHED_DISCARD 128
> +
> +static bool remove_objects(BDRVSheepdogState *s)
> +{
> + int fd, i = 0, nr_objs = 0;
> + Error *local_err = NULL;
> + int ret = 0;
> + bool result = true;
> + SheepdogInode *inode = &s->inode;
> +
> + fd = connect_to_sdog(s, &local_err);
> + if (fd < 0) {
> + error_report_err(local_err);
> + return false;
> + }
> +
> + nr_objs = count_data_objs(inode);
> + while (i < nr_objs) {
> + int start_idx, nr_filled_idx;
> +
> + while (i < nr_objs && !inode->data_vdi_id[i]) {
> + i++;
> + }
> + start_idx = i;
> +
> + nr_filled_idx = 0;
> + while (i < nr_objs && nr_filled_idx < NR_BATCHED_DISCARD) {
> + if (inode->data_vdi_id[i]) {
> + inode->data_vdi_id[i] = 0;
> + nr_filled_idx++;
> + }
> +
> + i++;
> + }
> +
> + ret = write_object(fd, s->aio_context,
> + (char *)&inode->data_vdi_id[start_idx],
> + vid_to_vdi_oid(s->inode.vdi_id),
> inode->nr_copies,
> + (i - start_idx) * sizeof(uint32_t),
> + offsetof(struct SheepdogInode,
> + data_vdi_id[start_idx]),
> + false, s->cache_flags);
> + if (ret < 0) {
> + error_report("failed to discard snapshot inode.");
> + result = false;
> + goto out;
> + }
> + }
> +
> +out:
> + closesocket(fd);
> + return result;
> +}
> +
> static int sd_snapshot_delete(BlockDriverState *bs,
> const char *snapshot_id,
> const char *name,
> Error **errp)
> {
> - /* FIXME: Delete specified snapshot id. */
> - return 0;
> + uint32_t snap_id = 0;
> + char snap_tag[SD_MAX_VDI_TAG_LEN];
> + Error *local_err = NULL;
> + int fd, ret;
> + char buf[SD_MAX_VDI_LEN + SD_MAX_VDI_TAG_LEN];
> + BDRVSheepdogState *s = bs->opaque;
> + unsigned int wlen = SD_MAX_VDI_LEN + SD_MAX_VDI_TAG_LEN, rlen = 0;
> + uint32_t vid;
> + SheepdogVdiReq hdr = {
> + .opcode = SD_OP_DEL_VDI,
> + .data_length = wlen,
> + .flags = SD_FLAG_CMD_WRITE,
> + };
> + SheepdogVdiRsp *rsp = (SheepdogVdiRsp *)&hdr;
> +
> + if (!remove_objects(s)) {
> + return -1;
> + }
> +
> + memset(buf, 0, sizeof(buf));
> + memset(snap_tag, 0, sizeof(snap_tag));
> + pstrcpy(buf, SD_MAX_VDI_LEN, s->name);
> + if (qemu_strtoul(snapshot_id, NULL, 10, (unsigned long *)&snap_id)) {
> + return -1;
> + }
> +
> + if (snap_id) {
> + hdr.snapid = snap_id;
> + } else {
> + pstrcpy(snap_tag, sizeof(snap_tag), snapshot_id);
> + pstrcpy(buf + SD_MAX_VDI_LEN, SD_MAX_VDI_TAG_LEN, snap_tag);
> + }
> +
> + ret = find_vdi_name(s, s->name, snap_id, snap_tag, &vid, true,
> + &local_err);
> + if (ret) {
> + return ret;
> + }
> +
> + fd = connect_to_sdog(s, &local_err);
> + if (fd < 0) {
> + error_report_err(local_err);
> + return -1;
> + }
> +
> + ret = do_req(fd, s->aio_context, (SheepdogReq *)&hdr,
> + buf, &wlen, &rlen);
> + closesocket(fd);
> + if (ret) {
> + return ret;
> + }
> +
> + switch (rsp->result) {
> + case SD_RES_NO_VDI:
> + error_report("%s was already deleted", s->name);
> + case SD_RES_SUCCESS:
> + break;
> + default:
> + error_report("%s, %s", sd_strerror(rsp->result), s->name);
> + return -1;
> + }
> +
> + return ret;
> }
>
> static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo
> **psn_tab)
> --
> 1.9.1
>
>
[-- Attachment #2: Type: text/html, Size: 6981 bytes --]
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] [PATCH] sheepdog: allow to delete snapshot
2015-12-23 12:22 [Qemu-devel] [PATCH] sheepdog: allow to delete snapshot Hitoshi Mitake
2016-01-13 2:09 ` Hitoshi Mitake
@ 2016-01-19 18:59 ` Jeff Cody
1 sibling, 0 replies; 3+ messages in thread
From: Jeff Cody @ 2016-01-19 18:59 UTC (permalink / raw)
To: Hitoshi Mitake; +Cc: sheepdog, qemu-devel, Vasiliy Tolstov
On Wed, Dec 23, 2015 at 09:22:26PM +0900, Hitoshi Mitake wrote:
> From: Vasiliy Tolstov <v.tolstov@selfip.ru>
>
> This patch implements a blockdriver function bdrv_snapshot_delete() in
> the sheepdog driver. With the new function, snapshots of sheepdog can
> be deleted from libvirt.
>
> Cc: Jeff Cody <jcody@redhat.com>
> Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
> Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>
> ---
> block/sheepdog.c | 125 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 123 insertions(+), 2 deletions(-)
>
> diff --git a/block/sheepdog.c b/block/sheepdog.c
> index d80e4ed..0a4f2fc 100644
> --- a/block/sheepdog.c
> +++ b/block/sheepdog.c
> @@ -283,6 +283,12 @@ static inline bool is_snapshot(struct SheepdogInode *inode)
> return !!inode->snap_ctime;
> }
>
> +static inline size_t count_data_objs(const struct SheepdogInode *inode)
> +{
> + return DIV_ROUND_UP(inode->vdi_size,
> + (1UL << inode->block_size_shift));
> +}
> +
> #undef DPRINTF
> #ifdef DEBUG_SDOG
> #define DPRINTF(fmt, args...) \
> @@ -2479,13 +2485,128 @@ out:
> return ret;
> }
>
> +#define NR_BATCHED_DISCARD 128
> +
> +static bool remove_objects(BDRVSheepdogState *s)
> +{
> + int fd, i = 0, nr_objs = 0;
> + Error *local_err = NULL;
> + int ret = 0;
> + bool result = true;
> + SheepdogInode *inode = &s->inode;
> +
> + fd = connect_to_sdog(s, &local_err);
> + if (fd < 0) {
> + error_report_err(local_err);
> + return false;
> + }
> +
> + nr_objs = count_data_objs(inode);
> + while (i < nr_objs) {
> + int start_idx, nr_filled_idx;
> +
> + while (i < nr_objs && !inode->data_vdi_id[i]) {
> + i++;
> + }
> + start_idx = i;
> +
> + nr_filled_idx = 0;
> + while (i < nr_objs && nr_filled_idx < NR_BATCHED_DISCARD) {
> + if (inode->data_vdi_id[i]) {
> + inode->data_vdi_id[i] = 0;
> + nr_filled_idx++;
> + }
> +
> + i++;
> + }
> +
> + ret = write_object(fd, s->aio_context,
> + (char *)&inode->data_vdi_id[start_idx],
> + vid_to_vdi_oid(s->inode.vdi_id), inode->nr_copies,
> + (i - start_idx) * sizeof(uint32_t),
> + offsetof(struct SheepdogInode,
> + data_vdi_id[start_idx]),
> + false, s->cache_flags);
> + if (ret < 0) {
> + error_report("failed to discard snapshot inode.");
> + result = false;
> + goto out;
> + }
> + }
> +
> +out:
> + closesocket(fd);
> + return result;
> +}
> +
> static int sd_snapshot_delete(BlockDriverState *bs,
> const char *snapshot_id,
> const char *name,
> Error **errp)
> {
> - /* FIXME: Delete specified snapshot id. */
> - return 0;
> + uint32_t snap_id = 0;
> + char snap_tag[SD_MAX_VDI_TAG_LEN];
> + Error *local_err = NULL;
> + int fd, ret;
> + char buf[SD_MAX_VDI_LEN + SD_MAX_VDI_TAG_LEN];
> + BDRVSheepdogState *s = bs->opaque;
> + unsigned int wlen = SD_MAX_VDI_LEN + SD_MAX_VDI_TAG_LEN, rlen = 0;
> + uint32_t vid;
> + SheepdogVdiReq hdr = {
> + .opcode = SD_OP_DEL_VDI,
> + .data_length = wlen,
> + .flags = SD_FLAG_CMD_WRITE,
> + };
> + SheepdogVdiRsp *rsp = (SheepdogVdiRsp *)&hdr;
> +
> + if (!remove_objects(s)) {
> + return -1;
> + }
> +
> + memset(buf, 0, sizeof(buf));
> + memset(snap_tag, 0, sizeof(snap_tag));
> + pstrcpy(buf, SD_MAX_VDI_LEN, s->name);
> + if (qemu_strtoul(snapshot_id, NULL, 10, (unsigned long *)&snap_id)) {
> + return -1;
> + }
> +
> + if (snap_id) {
> + hdr.snapid = snap_id;
> + } else {
> + pstrcpy(snap_tag, sizeof(snap_tag), snapshot_id);
> + pstrcpy(buf + SD_MAX_VDI_LEN, SD_MAX_VDI_TAG_LEN, snap_tag);
> + }
> +
> + ret = find_vdi_name(s, s->name, snap_id, snap_tag, &vid, true,
> + &local_err);
> + if (ret) {
> + return ret;
> + }
> +
> + fd = connect_to_sdog(s, &local_err);
> + if (fd < 0) {
> + error_report_err(local_err);
> + return -1;
> + }
> +
> + ret = do_req(fd, s->aio_context, (SheepdogReq *)&hdr,
> + buf, &wlen, &rlen);
> + closesocket(fd);
> + if (ret) {
> + return ret;
> + }
> +
> + switch (rsp->result) {
> + case SD_RES_NO_VDI:
> + error_report("%s was already deleted", s->name);
> + case SD_RES_SUCCESS:
> + break;
> + default:
> + error_report("%s, %s", sd_strerror(rsp->result), s->name);
> + return -1;
> + }
> +
> + return ret;
> }
>
> static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
> --
> 1.9.1
>
Thanks, applied to my block branch:
git://github.com/codyprime/qemu-kvm-jtc.git block
-Jeff
^ permalink raw reply [flat|nested] 3+ messages in thread
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2015-12-23 12:22 [Qemu-devel] [PATCH] sheepdog: allow to delete snapshot Hitoshi Mitake
2016-01-13 2:09 ` Hitoshi Mitake
2016-01-19 18:59 ` Jeff Cody
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