master - segtype: add linear

[Heinz Mauelshagen]

Gitweb:        https://sourceware.org/git/?p=lvm2.git;a=commitdiff;h=de66704253653305e45136...
Commit:        de66704253653305e4513637735a078af00912b7
Parent:        2eda683a205d1ad2463cf60d783bc63d9833717e
Author:        Heinz Mauelshagen 
AuthorDate:    Wed May 30 12:44:24 2018 +0200
Committer:     Heinz Mauelshagen 
CommitterDate: Tue Jun 5 16:23:18 2018 +0200

segtype: add linear

Add linear segtype addressing FIXME in preparation
for linear <-> striped convenience conversion support
---
 lib/commands/toolcontext.c |    1 +
 lib/metadata/segtype.c     |    4 ----
 lib/metadata/segtype.h     |    4 +++-
 lib/striped/striped.c      |   19 ++++++++++++++-----
 4 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/lib/commands/toolcontext.c b/lib/commands/toolcontext.c
index 7d0640a..8eaece6 100644
--- a/lib/commands/toolcontext.c
+++ b/lib/commands/toolcontext.c
@@ -1462,6 +1462,7 @@ static int _init_segtypes(struct cmd_context *cmd)
    struct segment_type *segtype;
    struct segtype_library seglib = { .cmd = cmd, .lib = NULL };
    struct segment_type *(*init_segtype_array[])(struct cmd_context *cmd) = {
+		init_linear_segtype,
    	init_striped_segtype,
    	init_zero_segtype,
    	init_error_segtype,
diff --git a/lib/metadata/segtype.c b/lib/metadata/segtype.c
index 2fdbaa3..a6f6203 100644
--- a/lib/metadata/segtype.c
+++ b/lib/metadata/segtype.c
@@ -22,10 +22,6 @@ struct segment_type *get_segtype_from_string(struct cmd_context *cmd,
 {
    struct segment_type *segtype;

-	/* FIXME Register this properly within striped.c */
-	if (!strcmp(str, SEG_TYPE_NAME_LINEAR))
-		str = SEG_TYPE_NAME_STRIPED;
-
    dm_list_iterate_items(segtype, &cmd->segtypes)
    	if (!strcmp(segtype->name, str))
    		return segtype;
diff --git a/lib/metadata/segtype.h b/lib/metadata/segtype.h
index fe19b34..5484c23 100644
--- a/lib/metadata/segtype.h
+++ b/lib/metadata/segtype.h
@@ -68,6 +68,7 @@ struct dev_manager;
 #define SEG_RAID6		SEG_RAID6_ZR

#define SEG_STRIPED_TARGET	(1ULL << 39)
+#define SEG_LINEAR_TARGET	(1ULL << 40)

#define SEG_UNKNOWN		(1ULL << 63)

@@ -105,7 +106,7 @@ struct dev_manager;
 #define SEG_TYPE_NAME_RAID6_RS_6	"raid6_rs_6"
 #define SEG_TYPE_NAME_RAID6_N_6		"raid6_n_6"

-#define segtype_is_linear(segtype)	(!strcmp(segtype->name, SEG_TYPE_NAME_LINEAR))
+#define segtype_is_linear(segtype)	(!strcmp((segtype)->name, SEG_TYPE_NAME_LINEAR))
 #define segtype_is_striped_target(segtype)	((segtype)->flags & SEG_STRIPED_TARGET ? 1 : 0)
 #define segtype_is_cache(segtype)	((segtype)->flags & SEG_CACHE ? 1 : 0)
 #define segtype_is_cache_pool(segtype)	((segtype)->flags & SEG_CACHE_POOL ? 1 : 0)
@@ -274,6 +275,7 @@ struct segtype_library;
 int lvm_register_segtype(struct segtype_library *seglib,
    		 struct segment_type *segtype);

+struct segment_type *init_linear_segtype(struct cmd_context *cmd);
 struct segment_type *init_striped_segtype(struct cmd_context *cmd);
 struct segment_type *init_zero_segtype(struct cmd_context *cmd);
 struct segment_type *init_error_segtype(struct cmd_context *cmd);
diff --git a/lib/striped/striped.c b/lib/striped/striped.c
index 9c8408c..a9854a2 100644
--- a/lib/striped/striped.c
+++ b/lib/striped/striped.c
@@ -230,7 +230,7 @@ static struct segtype_handler _striped_ops = {
    .destroy = _striped_destroy,
 };

-struct segment_type *init_striped_segtype(struct cmd_context *cmd)
+static struct segment_type *_init_segtype(struct cmd_context *cmd, const char *name, uint64_t target)
 {
    struct segment_type *segtype = dm_zalloc(sizeof(*segtype));

@@ -238,11 +238,20 @@ struct segment_type *init_striped_segtype(struct cmd_context *cmd)
    	return_NULL;

segtype->ops = &_striped_ops;
-	segtype->name = SEG_TYPE_NAME_STRIPED;
-	segtype->flags = SEG_STRIPED_TARGET |
-	    SEG_CAN_SPLIT | SEG_AREAS_STRIPED;
+	segtype->name = name;
+	segtype->flags = target | SEG_CAN_SPLIT | SEG_AREAS_STRIPED;

log_very_verbose("Initialised segtype: %s", segtype->name);
-
    return segtype;
 }
+
+struct segment_type *init_striped_segtype(struct cmd_context *cmd)
+{
+	return _init_segtype(cmd, SEG_TYPE_NAME_STRIPED, SEG_STRIPED_TARGET);
+}
+
+
+struct segment_type *init_linear_segtype(struct cmd_context *cmd)
+{
+	return _init_segtype(cmd, SEG_TYPE_NAME_LINEAR, SEG_LINEAR_TARGET);
+}