The recently-added 'guest-get-disk' command returns a list of
GuestDiskInfo entries, which in turn have a 'dependents' field which
lists devices these entries are dependent upon. Thus, 'dependencies'
is a better name for this field. Address this by renaming the field
accordingly.
Additionally, 'dependents' is specified as non-optional, even though
it's not implemented for w32. This is misleading, since it gives users
the impression that a particular disk might not have dependencies,
when in reality that information is simply not known to the guest
agent. Address this by making 'dependents' an optional field, and only
marking it as in-use when the facilities to obtain this information are
available to the guest agent.
Cc: Eric Blake <eblake@redhat.com>
Cc: Tomáš Golembiovský <tgolembi@redhat.com>
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
---
qga/commands-posix.c | 10 ++++++----
qga/qapi-schema.json | 8 ++++----
2 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 12c1ba5ef7..c089e38120 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -1285,6 +1285,7 @@ static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk)
g_debug("failed to list entries in %s", deps_dir);
return;
}
+ disk->has_dependencies = true;
while ((dep = g_dir_read_name(dp_deps)) != NULL) {
g_autofree char *dep_dir = NULL;
strList *dep_item = NULL;
@@ -1297,8 +1298,8 @@ static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk)
g_debug(" adding dependent device: %s", dev_name);
dep_item = g_new0(strList, 1);
dep_item->value = dev_name;
- dep_item->next = disk->dependents;
- disk->dependents = dep_item;
+ dep_item->next = disk->dependencies;
+ disk->dependencies = dep_item;
}
}
g_dir_close(dp_deps);
@@ -1351,8 +1352,9 @@ static GuestDiskInfoList *get_disk_partitions(
partition->name = dev_name;
partition->partition = true;
/* Add parent disk as dependent for easier tracking of hierarchy */
- partition->dependents = g_new0(strList, 1);
- partition->dependents->value = g_strdup(disk_dev);
+ partition->dependencies = g_new0(strList, 1);
+ partition->dependencies->value = g_strdup(disk_dev);
+ partition->has_dependencies = true;
item = g_new0(GuestDiskInfoList, 1);
item->value = partition;
diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
index 6ca85f995f..3b3d1d0bd9 100644
--- a/qga/qapi-schema.json
+++ b/qga/qapi-schema.json
@@ -870,9 +870,9 @@
#
# @name: device node (Linux) or device UNC (Windows)
# @partition: whether this is a partition or disk
-# @dependents: list of dependent devices; e.g. for LVs of the LVM this will
-# hold the list of PVs, for LUKS encrypted volume this will
-# contain the disk where the volume is placed. (Linux)
+# @dependencies: list of device dependencies; e.g. for LVs of the LVM this will
+# hold the list of PVs, for LUKS encrypted volume this will
+# contain the disk where the volume is placed. (Linux)
# @address: disk address information (only for non-virtual devices)
# @alias: optional alias assigned to the disk, on Linux this is a name assigned
# by device mapper
@@ -880,7 +880,7 @@
# Since 5.2
##
{ 'struct': 'GuestDiskInfo',
- 'data': {'name': 'str', 'partition': 'bool', 'dependents': ['str'],
+ 'data': {'name': 'str', 'partition': 'bool', '*dependencies': ['str'],
'*address': 'GuestDiskAddress', '*alias': 'str'} }
##
--
2.25.1
On Fri, Nov 13, 2020 at 10:49 PM Michael Roth <michael.roth@amd.com> wrote:
> The recently-added 'guest-get-disk' command returns a list of
> GuestDiskInfo entries, which in turn have a 'dependents' field which
> lists devices these entries are dependent upon. Thus, 'dependencies'
> is a better name for this field. Address this by renaming the field
> accordingly.
>
> Additionally, 'dependents' is specified as non-optional, even though
> it's not implemented for w32. This is misleading, since it gives users
> the impression that a particular disk might not have dependencies,
> when in reality that information is simply not known to the guest
> agent. Address this by making 'dependents' an optional field, and only
> marking it as in-use when the facilities to obtain this information are
> available to the guest agent.
>
> Cc: Eric Blake <eblake@redhat.com>
> Cc: Tomáš Golembiovský <tgolembi@redhat.com>
> Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
> Signed-off-by: Michael Roth <michael.roth@amd.com>
>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
> qga/commands-posix.c | 10 ++++++----
> qga/qapi-schema.json | 8 ++++----
> 2 files changed, 10 insertions(+), 8 deletions(-)
>
> diff --git a/qga/commands-posix.c b/qga/commands-posix.c
> index 12c1ba5ef7..c089e38120 100644
> --- a/qga/commands-posix.c
> +++ b/qga/commands-posix.c
> @@ -1285,6 +1285,7 @@ static void get_disk_deps(const char *disk_dir,
> GuestDiskInfo *disk)
> g_debug("failed to list entries in %s", deps_dir);
> return;
> }
> + disk->has_dependencies = true;
> while ((dep = g_dir_read_name(dp_deps)) != NULL) {
> g_autofree char *dep_dir = NULL;
> strList *dep_item = NULL;
> @@ -1297,8 +1298,8 @@ static void get_disk_deps(const char *disk_dir,
> GuestDiskInfo *disk)
> g_debug(" adding dependent device: %s", dev_name);
> dep_item = g_new0(strList, 1);
> dep_item->value = dev_name;
> - dep_item->next = disk->dependents;
> - disk->dependents = dep_item;
> + dep_item->next = disk->dependencies;
> + disk->dependencies = dep_item;
> }
> }
> g_dir_close(dp_deps);
> @@ -1351,8 +1352,9 @@ static GuestDiskInfoList *get_disk_partitions(
> partition->name = dev_name;
> partition->partition = true;
> /* Add parent disk as dependent for easier tracking of hierarchy
> */
> - partition->dependents = g_new0(strList, 1);
> - partition->dependents->value = g_strdup(disk_dev);
> + partition->dependencies = g_new0(strList, 1);
> + partition->dependencies->value = g_strdup(disk_dev);
> + partition->has_dependencies = true;
>
> item = g_new0(GuestDiskInfoList, 1);
> item->value = partition;
> diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
> index 6ca85f995f..3b3d1d0bd9 100644
> --- a/qga/qapi-schema.json
> +++ b/qga/qapi-schema.json
> @@ -870,9 +870,9 @@
> #
> # @name: device node (Linux) or device UNC (Windows)
> # @partition: whether this is a partition or disk
> -# @dependents: list of dependent devices; e.g. for LVs of the LVM this
> will
> -# hold the list of PVs, for LUKS encrypted volume this will
> -# contain the disk where the volume is placed. (Linux)
> +# @dependencies: list of device dependencies; e.g. for LVs of the LVM
> this will
> +# hold the list of PVs, for LUKS encrypted volume this will
> +# contain the disk where the volume is placed. (Linux)
> # @address: disk address information (only for non-virtual devices)
> # @alias: optional alias assigned to the disk, on Linux this is a name
> assigned
> # by device mapper
> @@ -880,7 +880,7 @@
> # Since 5.2
> ##
> { 'struct': 'GuestDiskInfo',
> - 'data': {'name': 'str', 'partition': 'bool', 'dependents': ['str'],
> + 'data': {'name': 'str', 'partition': 'bool', '*dependencies': ['str'],
> '*address': 'GuestDiskAddress', '*alias': 'str'} }
>
> ##
> --
> 2.25.1
>
>
>
--
Marc-André Lureau
On 11/13/20 12:33 PM, Michael Roth wrote:
> The recently-added 'guest-get-disk' command returns a list of
> GuestDiskInfo entries, which in turn have a 'dependents' field which
> lists devices these entries are dependent upon. Thus, 'dependencies'
> is a better name for this field. Address this by renaming the field
> accordingly.
>
> Additionally, 'dependents' is specified as non-optional, even though
> it's not implemented for w32. This is misleading, since it gives users
> the impression that a particular disk might not have dependencies,
> when in reality that information is simply not known to the guest
> agent. Address this by making 'dependents' an optional field, and only
> marking it as in-use when the facilities to obtain this information are
> available to the guest agent.
>
> Cc: Eric Blake <eblake@redhat.com>
> Cc: Tomáš Golembiovský <tgolembi@redhat.com>
> Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
> Signed-off-by: Michael Roth <michael.roth@amd.com>
> ---
> qga/commands-posix.c | 10 ++++++----
> qga/qapi-schema.json | 8 ++++----
> 2 files changed, 10 insertions(+), 8 deletions(-)
>
> diff --git a/qga/commands-posix.c b/qga/commands-posix.c
> index 12c1ba5ef7..c089e38120 100644
> --- a/qga/commands-posix.c
> +++ b/qga/commands-posix.c
> @@ -1285,6 +1285,7 @@ static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk)
> g_debug("failed to list entries in %s", deps_dir);
> return;
> }
> + disk->has_dependencies = true;
> while ((dep = g_dir_read_name(dp_deps)) != NULL) {
> g_autofree char *dep_dir = NULL;
> strList *dep_item = NULL;
> @@ -1297,8 +1298,8 @@ static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk)
> g_debug(" adding dependent device: %s", dev_name);
> dep_item = g_new0(strList, 1);
> dep_item->value = dev_name;
> - dep_item->next = disk->dependents;
> - disk->dependents = dep_item;
> + dep_item->next = disk->dependencies;
> + disk->dependencies = dep_item;
You could use QAPI_LIST_PREPEND() here (which was just recently added);
but if not, then my work to use that macro in more places in 6.0 will
revisit this code.
> }
> }
> g_dir_close(dp_deps);
> @@ -1351,8 +1352,9 @@ static GuestDiskInfoList *get_disk_partitions(
> partition->name = dev_name;
> partition->partition = true;
> /* Add parent disk as dependent for easier tracking of hierarchy */
> - partition->dependents = g_new0(strList, 1);
> - partition->dependents->value = g_strdup(disk_dev);
> + partition->dependencies = g_new0(strList, 1);
> + partition->dependencies->value = g_strdup(disk_dev);
Same here.
Reviewed-by: Eric Blake <eblake@redhat.com>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
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