[sheepdog] [PATCH v2 1/2] dog: fix cluster-wide snapshot inconsistency due to vdi deleted
Ruoyu
liangry at ucweb.com
Wed Aug 20 12:06:53 CEST 2014
Once vdi snapshot is deleted before executing 'dog cluster snapshot
save', error messsage just like as below is seen.
Failed to read object 807c2b2500000000 No object found
Failed to read inode header
Once a vdi is deleted, cluster snapshot save will not backup it to
farm so that cluster snapshot load cannot restore it to new cluster.
However, the vdi id is marked as in use for safety, vdi list
will try to read all vdis in use. Therefore, dog cannot read the object.
The solution is saving the deleted vdi object too. To achieve it,
a parameter, no_deleted, is added to the function parse_vdi.
The default value is true. But for cluster snapshot save, it is false.
Reported-by: Valerio Pachera <sirio81 at gmail.com>
Cc: Liu Yuan <namei.unix at gmail.com>
Signed-off-by: Ruoyu <liangry at ucweb.com>
---
v2:
- use no_deleted instead of include_deleted, advised by Yuan.
Signed-off-by: Ruoyu <liangry at ucweb.com>
---
dog/cluster.c | 5 +++--
dog/common.c | 6 ++++--
dog/dog.h | 3 ++-
dog/node.c | 2 +-
dog/vdi.c | 19 +++++++++++--------
5 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/dog/cluster.c b/dog/cluster.c
index 9cf96a8..7c4856d 100644
--- a/dog/cluster.c
+++ b/dog/cluster.c
@@ -419,7 +419,8 @@ static int save_snapshot(int argc, char **argv)
opt.count = argc - optind;
opt.name = argv + optind;
- if (parse_vdi(fill_object_tree, SD_INODE_SIZE, &opt) != SD_RES_SUCCESS)
+ if (parse_vdi(fill_object_tree, SD_INODE_SIZE,
+ &opt, false) != SD_RES_SUCCESS)
goto out;
if (object_tree_size() == 0) {
@@ -657,7 +658,7 @@ static void cluster_check_cb(uint32_t vid, const char *name, const char *tag,
static int cluster_check(int argc, char **argv)
{
- if (parse_vdi(cluster_check_cb, SD_INODE_SIZE, NULL) < 0)
+ if (parse_vdi(cluster_check_cb, SD_INODE_SIZE, NULL, true) < 0)
return EXIT_SYSFAIL;
return EXIT_SUCCESS;
diff --git a/dog/common.c b/dog/common.c
index 2335e14..3c4f6f5 100644
--- a/dog/common.c
+++ b/dog/common.c
@@ -128,7 +128,8 @@ int dog_write_object(uint64_t oid, uint64_t cow_oid, void *data,
#define FOR_EACH_VDI(nr, vdis) FOR_EACH_BIT(nr, vdis, SD_NR_VDIS)
-int parse_vdi(vdi_parser_func_t func, size_t size, void *data)
+int parse_vdi(vdi_parser_func_t func, size_t size, void *data,
+ bool no_deleted)
{
int ret;
unsigned long nr;
@@ -163,7 +164,8 @@ int parse_vdi(vdi_parser_func_t func, size_t size, void *data)
continue;
}
- if (i->name[0] == '\0') /* this VDI has been deleted */
+ /* this VDI has been deleted, and no need to handle it */
+ if (no_deleted && i->name[0] == '\0')
continue;
if (size > SD_INODE_HEADER_SIZE) {
diff --git a/dog/dog.h b/dog/dog.h
index 9b53b3f..80becc6 100644
--- a/dog/dog.h
+++ b/dog/dog.h
@@ -72,7 +72,8 @@ typedef void (*vdi_parser_func_t)(uint32_t vid, const char *name,
const char *tag, uint32_t snapid,
uint32_t flags,
const struct sd_inode *i, void *data);
-int parse_vdi(vdi_parser_func_t func, size_t size, void *data);
+int parse_vdi(vdi_parser_func_t func, size_t size, void *data,
+ bool no_deleted);
int dog_read_object(uint64_t oid, void *data, unsigned int datalen,
uint64_t offset, bool direct);
int dog_write_object(uint64_t oid, uint64_t cow_oid, void *data,
diff --git a/dog/node.c b/dog/node.c
index 3912496..a4e9142 100644
--- a/dog/node.c
+++ b/dog/node.c
@@ -87,7 +87,7 @@ static int node_info(int argc, char **argv)
}
if (parse_vdi(cal_total_vdi_size, SD_INODE_HEADER_SIZE,
- &total_vdi_size) < 0)
+ &total_vdi_size, true) < 0)
return EXIT_SYSFAIL;
printf(raw_output ? "Total %s %s %s %d%% %s\n"
diff --git a/dog/vdi.c b/dog/vdi.c
index 84715b3..9ca4171 100644
--- a/dog/vdi.c
+++ b/dog/vdi.c
@@ -288,7 +288,7 @@ static int vdi_list(int argc, char **argv)
struct get_vdi_info info;
memset(&info, 0, sizeof(info));
info.name = vdiname;
- if (parse_vdi(print_vdi_list, SD_INODE_SIZE, &info) < 0)
+ if (parse_vdi(print_vdi_list, SD_INODE_SIZE, &info, true) < 0)
return EXIT_SYSFAIL;
return EXIT_SUCCESS;
}
@@ -297,12 +297,12 @@ static int vdi_list(int argc, char **argv)
if (!is_data_obj(vdi_cmd_data.oid))
return EXIT_FAILURE;
if (parse_vdi(print_obj_ref, SD_INODE_SIZE,
- &vdi_cmd_data.oid) < 0)
+ &vdi_cmd_data.oid, true) < 0)
return EXIT_SYSFAIL;
return EXIT_SUCCESS;
}
- if (parse_vdi(print_vdi_list, SD_INODE_SIZE, NULL) < 0)
+ if (parse_vdi(print_vdi_list, SD_INODE_SIZE, NULL, true) < 0)
return EXIT_SYSFAIL;
return EXIT_SUCCESS;
}
@@ -310,7 +310,7 @@ static int vdi_list(int argc, char **argv)
static int vdi_tree(int argc, char **argv)
{
init_tree();
- if (parse_vdi(print_vdi_tree, SD_INODE_HEADER_SIZE, NULL) < 0)
+ if (parse_vdi(print_vdi_tree, SD_INODE_HEADER_SIZE, NULL, true) < 0)
return EXIT_SYSFAIL;
dump_tree();
@@ -324,7 +324,7 @@ static int vdi_graph(int argc, char **argv)
printf(" node [shape = \"box\", fontname = \"Courier\"];\n\n");
printf(" \"0\" [shape = \"ellipse\", label = \"root\"];\n\n");
- if (parse_vdi(print_vdi_graph, SD_INODE_HEADER_SIZE, NULL) < 0)
+ if (parse_vdi(print_vdi_graph, SD_INODE_HEADER_SIZE, NULL, true) < 0)
return EXIT_SYSFAIL;
/* print a footer */
@@ -2611,7 +2611,8 @@ static bool is_vdi_standalone(uint32_t vid, const char *name)
struct vdi_tree *vdi;
init_tree();
- if (parse_vdi(construct_vdi_tree, SD_INODE_HEADER_SIZE, NULL) < 0)
+ if (parse_vdi(construct_vdi_tree, SD_INODE_HEADER_SIZE,
+ NULL, true) < 0)
return EXIT_SYSFAIL;
vdi = find_vdi_from_root(vid, name);
@@ -2746,7 +2747,8 @@ retry:
}
init_tree();
- if (parse_vdi(construct_vdi_tree, SD_INODE_HEADER_SIZE, NULL) < 0)
+ if (parse_vdi(construct_vdi_tree, SD_INODE_HEADER_SIZE,
+ NULL, true) < 0)
return EXIT_SYSFAIL;
count = rsp->data_length / sizeof(*vs);
@@ -2801,7 +2803,8 @@ static int lock_force_unlock(int argc, char **argv)
struct vdi_tree *vdi;
init_tree();
- if (parse_vdi(construct_vdi_tree, SD_INODE_HEADER_SIZE, NULL) < 0)
+ if (parse_vdi(construct_vdi_tree, SD_INODE_HEADER_SIZE,
+ NULL, true) < 0)
return EXIT_SYSFAIL;
vdi = find_vdi_from_root_by_name(vdiname);
--
1.8.3.2
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