#include <libcfs/util/list.h>
#include <lustre/lustreapi.h>
-#include <lustre/lustre_idl.h>
#include "lustreapi_internal.h"
/**
uint32_t llot_gen;
uint32_t llot_flags;
bool llot_is_composite;
+ uint16_t llot_mirror_count;
/* Cursor pointing to one of the components in llot_comp_list */
struct llapi_layout_comp *llot_cur_comp;
struct list_head llot_comp_list;
layout->llot_gen = 0;
layout->llot_flags = 0;
layout->llot_is_composite = false;
+ layout->llot_mirror_count = 1;
layout->llot_cur_comp = NULL;
INIT_LIST_HEAD(&layout->llot_comp_list);
if (lum->lmm_magic == LOV_MAGIC_COMP_V1) {
comp_v1 = (struct lov_comp_md_v1 *)lum;
ent_count = comp_v1->lcm_entry_count;
+ layout->llot_gen = comp_v1->lcm_layout_gen;
layout->llot_is_composite = true;
+ layout->llot_mirror_count = comp_v1->lcm_mirror_count + 1;
layout->llot_gen = comp_v1->lcm_layout_gen;
layout->llot_flags = comp_v1->lcm_flags;
} else if (lum->lmm_magic == LOV_MAGIC_V1 ||
comp_cnt++;
lum_size = sizeof(*comp_v1) + comp_cnt * sizeof(*ent);
- lum = malloc(lum_size);
+ lum = calloc(lum_size, 1);
if (lum == NULL) {
errno = ENOMEM;
return NULL;
comp_v1->lcm_magic = LOV_USER_MAGIC_COMP_V1;
comp_v1->lcm_size = lum_size;
comp_v1->lcm_layout_gen = 0;
- comp_v1->lcm_flags = 0;
+ comp_v1->lcm_flags = layout->llot_flags;
comp_v1->lcm_entry_count = comp_cnt;
+ comp_v1->lcm_mirror_count = layout->llot_mirror_count - 1;
offset += lum_size;
}
blob->lmm_magic = magic;
if (pattern == LLAPI_LAYOUT_DEFAULT)
- blob->lmm_pattern = 0;
- else if (pattern == LLAPI_LAYOUT_RAID0)
blob->lmm_pattern = LOV_PATTERN_RAID0;
+ else if (pattern == LLAPI_LAYOUT_MDT)
+ blob->lmm_pattern = LOV_PATTERN_MDT;
else
blob->lmm_pattern = pattern;
if (comp == NULL)
return false;
- if (layout->llot_is_composite)
+ if (layout->llot_is_composite || layout->llot_mirror_count != 1)
return true;
return comp->llc_pattern != LLAPI_LAYOUT_DEFAULT ||
}
/**
- * Set the RAID pattern of \a layout.
+ * Set the pattern of \a layout.
*
* \param[in] layout layout to set pattern in
* \param[in] pattern value to be set
return -1;
if (pattern != LLAPI_LAYOUT_DEFAULT &&
- pattern != LLAPI_LAYOUT_RAID0) {
+ pattern != LLAPI_LAYOUT_RAID0 && pattern != LLAPI_LAYOUT_MDT) {
errno = EOPNOTSUPP;
return -1;
}
layout);
}
+int llapi_layout_flags_get(struct llapi_layout *layout, uint32_t *flags)
+{
+ if (layout->llot_magic != LLAPI_LAYOUT_MAGIC) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ *flags = layout->llot_flags;
+ return 0;
+}
+
+/**
+ * Set flags to the header of a component layout.
+ */
+int llapi_layout_flags_set(struct llapi_layout *layout, uint32_t flags)
+{
+ if (layout->llot_magic != LLAPI_LAYOUT_MAGIC) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ layout->llot_flags = flags;
+ return 0;
+}
+
+/**
+ * llapi_layout_mirror_count_is_valid() - Check the validity of mirror count.
+ * @count: Mirror count value to be checked.
+ *
+ * This function checks the validity of mirror count.
+ *
+ * Return: true on success or false on failure.
+ */
+static bool llapi_layout_mirror_count_is_valid(uint16_t count)
+{
+ return count >= 0 && count <= LUSTRE_MIRROR_COUNT_MAX;
+}
+
+/**
+ * llapi_layout_mirror_count_get() - Get mirror count from the header of
+ * a layout.
+ * @layout: Layout to get mirror count from.
+ * @count: Returned mirror count value.
+ *
+ * This function gets mirror count from the header of a layout.
+ *
+ * Return: 0 on success or -1 on failure.
+ */
+int llapi_layout_mirror_count_get(struct llapi_layout *layout,
+ uint16_t *count)
+{
+ if (layout->llot_magic != LLAPI_LAYOUT_MAGIC) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ *count = layout->llot_mirror_count;
+ return 0;
+}
+
+/**
+ * llapi_layout_mirror_count_set() - Set mirror count to the header of a layout.
+ * @layout: Layout to set mirror count in.
+ * @count: Mirror count value to be set.
+ *
+ * This function sets mirror count to the header of a layout.
+ *
+ * Return: 0 on success or -1 on failure.
+ */
+int llapi_layout_mirror_count_set(struct llapi_layout *layout,
+ uint16_t count)
+{
+ if (layout->llot_magic != LLAPI_LAYOUT_MAGIC) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (!llapi_layout_mirror_count_is_valid(count)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ layout->llot_mirror_count = count;
+ return 0;
+}
+
/**
* Fetch the start and end offset of the current layout component.
*
}
/**
+ * Return the mirror id of the current layout component.
+ *
+ * \param[in] layout the layout component
+ * \param[out] id stored the returned mirror ID
+ *
+ * \retval 0 on success
+ * \retval <0 if error occurs
+ */
+int llapi_layout_mirror_id_get(const struct llapi_layout *layout, uint32_t *id)
+{
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (id == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ *id = mirror_id_of(comp->llc_id);
+
+ return 0;
+}
+
+/**
* Adds a component to \a layout, the new component will be added to
* the tail of components list and it'll inherit attributes of existing
* ones. The \a layout will change it's current component pointer to
last = list_entry(layout->llot_comp_list.prev, typeof(*last),
llc_list);
- /* Inherit some attributes from existing component */
- new->llc_stripe_size = comp->llc_stripe_size;
- new->llc_stripe_count = comp->llc_stripe_count;
- if (comp->llc_pool_name[0] != '\0')
- strncpy(new->llc_pool_name, comp->llc_pool_name,
- sizeof(comp->llc_pool_name));
if (new->llc_extent.e_end <= last->llc_extent.e_end) {
__llapi_comp_free(new);
errno = EINVAL;
return -1;
if (!layout->llot_is_composite) {
- errno = EINVAL;
- return -1;
+ if (pos == LLAPI_LAYOUT_COMP_USE_FIRST ||
+ pos == LLAPI_LAYOUT_COMP_USE_LAST)
+ return 0;
+ errno = ENOENT;
+ return 1;
}
head = list_entry(layout->llot_comp_list.next, typeof(*head), llc_list);
{
return layout->llot_is_composite;
}
+
+/**
+ * llapi_layout_merge() - Merge a composite layout into another one.
+ * @dst_layout: Destination composite layout.
+ * @src_layout: Source composite layout.
+ *
+ * This function copies all of the components from @src_layout and
+ * appends them to @dst_layout.
+ *
+ * Return: 0 on success or -1 on failure.
+ */
+int llapi_layout_merge(struct llapi_layout **dst_layout,
+ const struct llapi_layout *src_layout)
+{
+ struct llapi_layout *new_layout = *dst_layout;
+ struct llapi_layout_comp *new = NULL;
+ struct llapi_layout_comp *comp = NULL;
+ int i = 0;
+
+ if (src_layout == NULL ||
+ list_empty((struct list_head *)&src_layout->llot_comp_list))
+ return 0;
+
+ if (new_layout == NULL) {
+ new_layout = __llapi_layout_alloc();
+ if (new_layout == NULL) {
+ errno = ENOMEM;
+ return -1;
+ }
+ }
+
+ list_for_each_entry(comp, &src_layout->llot_comp_list, llc_list) {
+ new = __llapi_comp_alloc(0);
+ if (new == NULL) {
+ errno = ENOMEM;
+ goto error;
+ }
+
+ new->llc_pattern = comp->llc_pattern;
+ new->llc_stripe_size = comp->llc_stripe_size;
+ new->llc_stripe_count = comp->llc_stripe_count;
+ new->llc_stripe_offset = comp->llc_stripe_offset;
+
+ if (comp->llc_pool_name[0] != '\0')
+ strncpy(new->llc_pool_name, comp->llc_pool_name,
+ sizeof(new->llc_pool_name));
+
+ for (i = 0; i < comp->llc_objects_count; i++) {
+ if (__llapi_comp_objects_realloc(new,
+ stripe_number_roundup(i)) < 0) {
+ errno = EINVAL;
+ __llapi_comp_free(new);
+ goto error;
+ }
+ new->llc_objects[i].l_ost_idx = \
+ comp->llc_objects[i].l_ost_idx;
+ }
+
+ new->llc_objects_count = comp->llc_objects_count;
+ new->llc_extent.e_start = comp->llc_extent.e_start;
+ new->llc_extent.e_end = comp->llc_extent.e_end;
+ new->llc_id = comp->llc_id;
+ new->llc_flags = comp->llc_flags;
+
+ list_add_tail(&new->llc_list, &new_layout->llot_comp_list);
+ new_layout->llot_cur_comp = new;
+ }
+ new_layout->llot_is_composite = true;
+
+ *dst_layout = new_layout;
+ return 0;
+error:
+ llapi_layout_free(new_layout);
+ return -1;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff