* Lustre files while hiding details of the internal data structures
* from the user.
*
- * Copyright (c) 2016, Intel Corporation.
+ * Copyright (c) 2016, 2017, Intel Corporation.
*
* Author: Ned Bass <bass6@llnl.gov>
*/
#include <unistd.h>
#include <errno.h>
#include <limits.h>
+#include <assert.h>
#include <sys/xattr.h>
+#include <sys/param.h>
+#include <libcfs/util/list.h>
#include <lustre/lustreapi.h>
-#include <lustre/lustre_idl.h>
#include "lustreapi_internal.h"
/**
+ * Layout component, which contains all attributes of a plain
+ * V1/V3 layout.
+ */
+struct llapi_layout_comp {
+ uint64_t llc_pattern;
+ uint64_t llc_stripe_size;
+ uint64_t llc_stripe_count;
+ uint64_t llc_stripe_offset;
+ /* Add 1 so user always gets back a null terminated string. */
+ char llc_pool_name[LOV_MAXPOOLNAME + 1];
+ /** Number of objects in llc_objects array if was initialized. */
+ uint32_t llc_objects_count;
+ struct lov_user_ost_data_v1 *llc_objects;
+ /* fields used only for composite layouts */
+ struct lu_extent llc_extent; /* [start, end) of component */
+ uint32_t llc_id; /* unique ID of component */
+ uint32_t llc_flags; /* LCME_FL_* flags */
+ uint64_t llc_timestamp; /* snapshot timestamp */
+ struct list_head llc_list; /* linked to the llapi_layout
+ components list */
+ bool llc_ondisk;
+};
+
+/**
* An Opaque data type abstracting the layout of a Lustre file.
- *
- * Duplicate the fields we care about from struct lov_user_md_v3.
- * Deal with v1 versus v3 format issues only when we read or write
- * files.
*/
struct llapi_layout {
- uint32_t llot_magic;
- uint64_t llot_pattern;
- uint64_t llot_stripe_size;
- uint64_t llot_stripe_count;
- uint64_t llot_stripe_offset;
- /* Add 1 so user always gets back a null terminated string. */
- char llot_pool_name[LOV_MAXPOOLNAME + 1];
- /** Number of objects in llot_objects array if was initialized. */
- uint32_t llot_objects_count;
- struct lov_user_ost_data_v1 *llot_objects;
+ uint32_t llot_magic; /* LLAPI_LAYOUT_MAGIC */
+ 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;
};
/**
+ * Compute the number of elements in the lmm_objects array of \a lum
+ * with size \a lum_size.
+ *
+ * \param[in] lum the struct lov_user_md to check
+ * \param[in] lum_size the number of bytes in \a lum
+ *
+ * \retval number of elements in array lum->lmm_objects
+ */
+static int llapi_layout_objects_in_lum(struct lov_user_md *lum, size_t lum_size)
+{
+ uint32_t magic;
+ size_t base_size;
+
+ if (lum_size < lov_user_md_size(0, LOV_MAGIC_V1))
+ return 0;
+
+ if (lum->lmm_magic == __swab32(LOV_MAGIC_V1) ||
+ lum->lmm_magic == __swab32(LOV_MAGIC_V3))
+ magic = __swab32(lum->lmm_magic);
+ else
+ magic = lum->lmm_magic;
+
+ base_size = lov_user_md_size(0, magic);
+
+ if (lum_size <= base_size)
+ return 0;
+ else
+ return (lum_size - base_size) / sizeof(lum->lmm_objects[0]);
+}
+
+/**
* Byte-swap the fields of struct lov_user_md.
*
* XXX Rather than duplicating swabbing code here, we should eventually
* into a library that can be shared between kernel and user code.
*/
static void
-llapi_layout_swab_lov_user_md(struct lov_user_md *lum, int object_count)
+llapi_layout_swab_lov_user_md(struct lov_user_md *lum, int lum_size)
{
- int i;
- struct lov_user_md_v3 *lumv3 = (struct lov_user_md_v3 *)lum;
+ int i, j, ent_count, obj_count;
+ struct lov_comp_md_v1 *comp_v1 = NULL;
+ struct lov_comp_md_entry_v1 *ent;
struct lov_user_ost_data *lod;
- __swab32s(&lum->lmm_magic);
- __swab32s(&lum->lmm_pattern);
- __swab32s(&lum->lmm_stripe_size);
- __swab16s(&lum->lmm_stripe_count);
- __swab16s(&lum->lmm_stripe_offset);
+ if (lum->lmm_magic != __swab32(LOV_MAGIC_V1) &&
+ lum->lmm_magic != __swab32(LOV_MAGIC_V3) &&
+ lum->lmm_magic != __swab32(LOV_MAGIC_COMP_V1))
+ return;
+
+ if (lum->lmm_magic == __swab32(LOV_MAGIC_COMP_V1))
+ comp_v1 = (struct lov_comp_md_v1 *)lum;
+
+ if (comp_v1 != NULL) {
+ comp_v1->lcm_magic = __swab32(comp_v1->lcm_magic);
+ comp_v1->lcm_size = __swab32(comp_v1->lcm_size);
+ comp_v1->lcm_layout_gen = __swab32(comp_v1->lcm_layout_gen);
+ comp_v1->lcm_flags = __swab16(comp_v1->lcm_flags);
+ comp_v1->lcm_entry_count = __swab16(comp_v1->lcm_entry_count);
+ ent_count = comp_v1->lcm_entry_count;
+ } else {
+ ent_count = 1;
+ }
- if (lum->lmm_magic != LOV_MAGIC_V1)
- lod = lumv3->lmm_objects;
- else
- lod = lum->lmm_objects;
+ for (i = 0; i < ent_count; i++) {
+ if (comp_v1 != NULL) {
+ ent = &comp_v1->lcm_entries[i];
+ ent->lcme_id = __swab32(ent->lcme_id);
+ ent->lcme_flags = __swab32(ent->lcme_flags);
+ ent->lcme_timestamp = __swab64(ent->lcme_timestamp);
+ ent->lcme_extent.e_start = __swab64(ent->lcme_extent.e_start);
+ ent->lcme_extent.e_end = __swab64(ent->lcme_extent.e_end);
+ ent->lcme_offset = __swab32(ent->lcme_offset);
+ ent->lcme_size = __swab32(ent->lcme_size);
+
+ lum = (struct lov_user_md *)((char *)comp_v1 +
+ ent->lcme_offset);
+ lum_size = ent->lcme_size;
+ }
+ obj_count = llapi_layout_objects_in_lum(lum, lum_size);
+
+ lum->lmm_magic = __swab32(lum->lmm_magic);
+ lum->lmm_pattern = __swab32(lum->lmm_pattern);
+ lum->lmm_stripe_size = __swab32(lum->lmm_stripe_size);
+ lum->lmm_stripe_count = __swab16(lum->lmm_stripe_count);
+ lum->lmm_stripe_offset = __swab16(lum->lmm_stripe_offset);
+
+ if (lum->lmm_magic != LOV_MAGIC_V1) {
+ struct lov_user_md_v3 *v3;
+ v3 = (struct lov_user_md_v3 *)lum;
+ lod = v3->lmm_objects;
+ } else {
+ lod = lum->lmm_objects;
+ }
- for (i = 0; i < object_count; i++)
- __swab32s(&lod[i].l_ost_idx);
+ for (j = 0; j < obj_count; j++)
+ lod[j].l_ost_idx = __swab32(lod[j].l_ost_idx);
+ }
}
/**
- * (Re-)allocate llot_objects[] to \a num_stripes stripes.
+ * (Re-)allocate llc_objects[] to \a num_stripes stripes.
*
- * Copy over existing llot_objects[], if any, to the new llot_objects[].
+ * Copy over existing llc_objects[], if any, to the new llc_objects[].
*
* \param[in] layout existing layout to be modified
* \param[in] num_stripes number of stripes in new layout
* \retval 0 if the objects are re-allocated successfully
* \retval -1 on error with errno set
*/
-static int __llapi_layout_objects_realloc(struct llapi_layout *layout,
- unsigned int new_stripes)
+static int __llapi_comp_objects_realloc(struct llapi_layout_comp *comp,
+ unsigned int new_stripes)
{
struct lov_user_ost_data_v1 *new_objects;
unsigned int i;
return -1;
}
- if (new_stripes == 0 && layout->llot_objects_count == 0)
+ if (new_stripes == comp->llc_objects_count)
return 0;
- if (new_stripes != 0 && new_stripes <= layout->llot_objects_count)
+ if (new_stripes != 0 && new_stripes <= comp->llc_objects_count)
return 0;
- new_objects = realloc(layout->llot_objects,
+ new_objects = realloc(comp->llc_objects,
sizeof(*new_objects) * new_stripes);
if (new_objects == NULL && new_stripes != 0) {
errno = ENOMEM;
return -1;
}
- for (i = layout->llot_objects_count; i < new_stripes; i++)
+ for (i = comp->llc_objects_count; i < new_stripes; i++)
new_objects[i].l_ost_idx = LLAPI_LAYOUT_IDX_MAX;
- if (new_stripes == 0)
- layout->llot_objects = NULL;
- else
- layout->llot_objects = new_objects;
- layout->llot_objects_count = new_stripes;
+ comp->llc_objects = new_objects;
+ comp->llc_objects_count = new_stripes;
return 0;
}
/**
- * Allocate storage for a llapi_layout with \a num_stripes stripes.
+ * Allocate storage for a llapi_layout_comp with \a num_stripes stripes.
*
* \param[in] num_stripes number of stripes in new layout
*
* \retval valid pointer if allocation succeeds
* \retval NULL if allocation fails
*/
-static struct llapi_layout *__llapi_layout_alloc(unsigned int num_stripes)
+static struct llapi_layout_comp *__llapi_comp_alloc(unsigned int num_stripes)
{
- struct llapi_layout *layout;
+ struct llapi_layout_comp *comp;
if (num_stripes > LOV_MAX_STRIPE_COUNT) {
errno = EINVAL;
return NULL;
}
+ comp = calloc(1, sizeof(*comp));
+ if (comp == NULL) {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ comp->llc_objects = NULL;
+ comp->llc_objects_count = 0;
+
+ if (__llapi_comp_objects_realloc(comp, num_stripes) < 0) {
+ free(comp);
+ return NULL;
+ }
+
+ /* Set defaults. */
+ comp->llc_pattern = LLAPI_LAYOUT_DEFAULT;
+ comp->llc_stripe_size = LLAPI_LAYOUT_DEFAULT;
+ comp->llc_stripe_count = LLAPI_LAYOUT_DEFAULT;
+ comp->llc_stripe_offset = LLAPI_LAYOUT_DEFAULT;
+ comp->llc_pool_name[0] = '\0';
+ comp->llc_extent.e_start = 0;
+ comp->llc_extent.e_end = LUSTRE_EOF;
+ comp->llc_flags = 0;
+ comp->llc_id = 0;
+ INIT_LIST_HEAD(&comp->llc_list);
+
+ return comp;
+}
+
+/**
+ * Free memory allocated for \a comp
+ *
+ * \param[in] comp previously allocated by __llapi_comp_alloc()
+ */
+static void __llapi_comp_free(struct llapi_layout_comp *comp)
+{
+ if (comp->llc_objects != NULL)
+ free(comp->llc_objects);
+ free(comp);
+}
+
+/**
+ * Free memory allocated for \a layout.
+ *
+ * \param[in] layout previously allocated by llapi_layout_alloc()
+ */
+void llapi_layout_free(struct llapi_layout *layout)
+{
+ struct llapi_layout_comp *comp, *n;
+
+ if (layout == NULL)
+ return;
+
+ list_for_each_entry_safe(comp, n, &layout->llot_comp_list, llc_list) {
+ list_del_init(&comp->llc_list);
+ __llapi_comp_free(comp);
+ }
+ free(layout);
+}
+
+/**
+ * Allocate and initialize a llapi_layout structure.
+ *
+ * \retval valid llapi_layout pointer on success
+ * \retval NULL if memory allocation fails
+ */
+static struct llapi_layout *__llapi_layout_alloc(void)
+{
+ struct llapi_layout *layout;
+
layout = calloc(1, sizeof(*layout));
if (layout == NULL) {
errno = ENOMEM;
return NULL;
}
- layout->llot_objects = NULL;
- layout->llot_objects_count = 0;
+ /* Set defaults. */
+ layout->llot_magic = LLAPI_LAYOUT_MAGIC;
+ 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);
+
+ return layout;
+}
+
+/**
+ * Allocate and initialize a new plain layout.
+ *
+ * \retval valid llapi_layout pointer on success
+ * \retval NULL if memory allocation fails
+ */
+struct llapi_layout *llapi_layout_alloc(void)
+{
+ struct llapi_layout_comp *comp;
+ struct llapi_layout *layout;
+
+ layout = __llapi_layout_alloc();
+ if (layout == NULL)
+ return NULL;
- if (__llapi_layout_objects_realloc(layout, num_stripes) < 0) {
+ comp = __llapi_comp_alloc(0);
+ if (comp == NULL) {
free(layout);
- layout = NULL;
+ return NULL;
}
+ list_add_tail(&comp->llc_list, &layout->llot_comp_list);
+ layout->llot_cur_comp = comp;
+
return layout;
}
/**
- * Copy the data from a lov_user_md to a newly allocated llapi_layout.
+ * Check if the given \a lum_size is large enough to hold the required
+ * fields in \a lum.
*
+ * \param[in] lum the struct lov_user_md to check
+ * \param[in] lum_size the number of bytes in \a lum
+ *
+ * \retval true the \a lum_size is too small
+ * \retval false the \a lum_size is large enough
+ */
+static bool llapi_layout_lum_truncated(struct lov_user_md *lum, size_t lum_size)
+{
+ uint32_t magic;
+
+ if (lum_size < sizeof(lum->lmm_magic))
+ return true;
+
+ if (lum->lmm_magic == LOV_MAGIC_V1 ||
+ lum->lmm_magic == __swab32(LOV_MAGIC_V1))
+ magic = LOV_MAGIC_V1;
+ else if (lum->lmm_magic == LOV_MAGIC_V3 ||
+ lum->lmm_magic == __swab32(LOV_MAGIC_V3))
+ magic = LOV_MAGIC_V3;
+ else if (lum->lmm_magic == LOV_MAGIC_COMP_V1 ||
+ lum->lmm_magic == __swab32(LOV_MAGIC_COMP_V1))
+ magic = LOV_MAGIC_COMP_V1;
+ else
+ return true;
+
+ if (magic == LOV_MAGIC_V1 || magic == LOV_MAGIC_V3)
+ return lum_size < lov_user_md_size(0, magic);
+ else
+ return lum_size < sizeof(struct lov_comp_md_v1);
+}
+
+/* Verify if the objects count in lum is consistent with the
+ * stripe count in lum. It applies to regular file only. */
+static bool llapi_layout_lum_valid(struct lov_user_md *lum, int lum_size)
+{
+ struct lov_comp_md_v1 *comp_v1 = NULL;
+ int i, ent_count, obj_count;
+
+ if (lum->lmm_magic == LOV_MAGIC_COMP_V1) {
+ comp_v1 = (struct lov_comp_md_v1 *)lum;
+ ent_count = comp_v1->lcm_entry_count;
+ } else if (lum->lmm_magic == LOV_MAGIC_V1 ||
+ lum->lmm_magic == LOV_MAGIC_V3) {
+ ent_count = 1;
+ } else {
+ return false;
+ }
+
+ for (i = 0; i < ent_count; i++) {
+ if (comp_v1) {
+ lum = (struct lov_user_md *)((char *)comp_v1 +
+ comp_v1->lcm_entries[i].lcme_offset);
+ lum_size = comp_v1->lcm_entries[i].lcme_size;
+ }
+ obj_count = llapi_layout_objects_in_lum(lum, lum_size);
+
+ if (comp_v1) {
+ if (!(comp_v1->lcm_entries[i].lcme_flags &
+ LCME_FL_INIT) && obj_count != 0)
+ return false;
+ } else if (obj_count != lum->lmm_stripe_count) {
+ return false;
+ }
+ }
+ return true;
+}
+
+/**
+ * Convert the data from a lov_user_md to a newly allocated llapi_layout.
* The caller is responsible for freeing the returned pointer.
*
- * \param[in] lum LOV user metadata structure to copy data from
+ * \param[in] lov_xattr LOV user metadata xattr to copy data from
+ * \param[in] lov_xattr_size size the lov_xattr_size passed in
+ * \param[in] flags bitwise-or'd flags to control the behavior
*
* \retval valid llapi_layout pointer on success
* \retval NULL if memory allocation fails
*/
-static struct llapi_layout *
-llapi_layout_from_lum(const struct lov_user_md *lum, size_t object_count)
+struct llapi_layout *llapi_layout_get_by_xattr(void *lov_xattr,
+ ssize_t lov_xattr_size,
+ uint32_t flags)
{
- struct llapi_layout *layout;
- size_t objects_sz;
+ struct lov_user_md *lum = lov_xattr;
+ struct lov_comp_md_v1 *comp_v1 = NULL;
+ struct lov_comp_md_entry_v1 *ent;
+ struct lov_user_md *v1;
+ struct llapi_layout *layout = NULL;
+ struct llapi_layout_comp *comp;
+ int i, ent_count = 0, obj_count;
- objects_sz = object_count * sizeof(lum->lmm_objects[0]);
+ if (lov_xattr == NULL || lov_xattr_size <= 0) {
+ errno = EINVAL;
+ return NULL;
+ }
- layout = __llapi_layout_alloc(object_count);
- if (layout == NULL)
+ /* Return an error if we got back a partial layout. */
+ if (llapi_layout_lum_truncated(lov_xattr, lov_xattr_size)) {
+ errno = ERANGE;
return NULL;
+ }
- layout->llot_magic = LLAPI_LAYOUT_MAGIC;
+#if __BYTE_ORDER == __BIG_ENDIAN
+ if (flags & LLAPI_LXF_COPY) {
+ lum = malloc(lov_xattr_size);
+ if (lum == NULL) {
+ errno = ENOMEM;
+ return NULL;
+ }
+ memcpy(lum, lov_xattr, lov_xattr_size);
+ }
+#endif
- if (lum->lmm_pattern == LOV_PATTERN_RAID0)
- layout->llot_pattern = LLAPI_LAYOUT_RAID0;
- else
- /* Lustre only supports RAID0 for now. */
- layout->llot_pattern = lum->lmm_pattern;
+ llapi_layout_swab_lov_user_md(lum, lov_xattr_size);
- if (lum->lmm_stripe_size == 0)
- layout->llot_stripe_size = LLAPI_LAYOUT_DEFAULT;
- else
- layout->llot_stripe_size = lum->lmm_stripe_size;
+ if ((flags & LLAPI_LXF_CHECK) &&
+ !llapi_layout_lum_valid(lum, lov_xattr_size)) {
+ errno = EBADSLT;
+ goto out;
+ }
- if (lum->lmm_stripe_count == (typeof(lum->lmm_stripe_count))-1)
- layout->llot_stripe_count = LLAPI_LAYOUT_WIDE;
- else if (lum->lmm_stripe_count == 0)
- layout->llot_stripe_count = LLAPI_LAYOUT_DEFAULT;
- else
- layout->llot_stripe_count = lum->lmm_stripe_count;
+ layout = __llapi_layout_alloc();
+ if (layout == NULL) {
+ errno = ENOMEM;
+ goto out;
+ }
- if (lum->lmm_stripe_offset == (typeof(lum->lmm_stripe_offset))-1)
- layout->llot_stripe_offset = LLAPI_LAYOUT_DEFAULT;
- else
- layout->llot_stripe_offset = lum->lmm_stripe_offset;
-
- if (lum->lmm_magic != LOV_USER_MAGIC_V1) {
- const struct lov_user_md_v3 *lumv3;
- lumv3 = (struct lov_user_md_v3 *)lum;
- snprintf(layout->llot_pool_name, sizeof(layout->llot_pool_name),
- "%s", lumv3->lmm_pool_name);
- memcpy(layout->llot_objects, lumv3->lmm_objects, objects_sz);
+ 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 ||
+ lum->lmm_magic == LOV_MAGIC_V3) {
+ ent_count = 1;
+ layout->llot_is_composite = false;
+
+ if (lov_xattr_size <= 0) {
+ errno = EINVAL;
+ goto out_layout;
+ }
} else {
- const struct lov_user_md_v1 *lumv1;
- lumv1 = (struct lov_user_md_v1 *)lum;
- memcpy(layout->llot_objects, lumv1->lmm_objects, objects_sz);
+ errno = EOPNOTSUPP;
+ goto out_layout;
+ }
+
+ if (ent_count == 0) {
+ errno = EINVAL;
+ goto out_layout;
}
- if (object_count != 0)
- layout->llot_stripe_offset = layout->llot_objects[0].l_ost_idx;
+ v1 = (struct lov_user_md *)lum;
+ for (i = 0; i < ent_count; i++) {
+ if (comp_v1 != NULL) {
+ ent = &comp_v1->lcm_entries[i];
+ v1 = (struct lov_user_md *)((char *)comp_v1 +
+ ent->lcme_offset);
+ lov_xattr_size = ent->lcme_size;
+ } else {
+ ent = NULL;
+ }
+
+ obj_count = llapi_layout_objects_in_lum(v1, lov_xattr_size);
+ comp = __llapi_comp_alloc(obj_count);
+ if (comp == NULL)
+ goto out_layout;
+
+ if (ent != NULL) {
+ comp->llc_extent.e_start = ent->lcme_extent.e_start;
+ comp->llc_extent.e_end = ent->lcme_extent.e_end;
+ comp->llc_id = ent->lcme_id;
+ comp->llc_flags = ent->lcme_flags;
+ if (comp->llc_flags & LCME_FL_NOSYNC)
+ comp->llc_timestamp = ent->lcme_timestamp;
+ } else {
+ comp->llc_extent.e_start = 0;
+ comp->llc_extent.e_end = LUSTRE_EOF;
+ comp->llc_id = 0;
+ comp->llc_flags = 0;
+ }
+
+ if (v1->lmm_pattern == LOV_PATTERN_RAID0)
+ comp->llc_pattern = LLAPI_LAYOUT_RAID0;
+ else if (v1->lmm_pattern == (LOV_PATTERN_RAID0 |
+ LOV_PATTERN_OVERSTRIPING))
+ comp->llc_pattern = LLAPI_LAYOUT_OVERSTRIPING;
+ else if (v1->lmm_pattern == LOV_PATTERN_MDT)
+ comp->llc_pattern = LLAPI_LAYOUT_MDT;
+ else
+ /* Lustre only supports RAID0, overstripping
+ * and DoM for now.
+ */
+ comp->llc_pattern = v1->lmm_pattern;
+
+ if (v1->lmm_stripe_size == 0)
+ comp->llc_stripe_size = LLAPI_LAYOUT_DEFAULT;
+ else
+ comp->llc_stripe_size = v1->lmm_stripe_size;
+
+ if (v1->lmm_stripe_count == (typeof(v1->lmm_stripe_count))-1)
+ comp->llc_stripe_count = LLAPI_LAYOUT_WIDE;
+ else if (v1->lmm_stripe_count == 0)
+ comp->llc_stripe_count = LLAPI_LAYOUT_DEFAULT;
+ else
+ comp->llc_stripe_count = v1->lmm_stripe_count;
+
+ if (v1->lmm_stripe_offset ==
+ (typeof(v1->lmm_stripe_offset))-1)
+ comp->llc_stripe_offset = LLAPI_LAYOUT_DEFAULT;
+ else
+ comp->llc_stripe_offset = v1->lmm_stripe_offset;
+
+ if (v1->lmm_magic != LOV_USER_MAGIC_V1) {
+ const struct lov_user_md_v3 *lumv3;
+ lumv3 = (struct lov_user_md_v3 *)v1;
+ snprintf(comp->llc_pool_name,
+ sizeof(comp->llc_pool_name),
+ "%s", lumv3->lmm_pool_name);
+ memcpy(comp->llc_objects, lumv3->lmm_objects,
+ obj_count * sizeof(lumv3->lmm_objects[0]));
+ } else {
+ const struct lov_user_md_v1 *lumv1;
+ lumv1 = (struct lov_user_md_v1 *)v1;
+ memcpy(comp->llc_objects, lumv1->lmm_objects,
+ obj_count * sizeof(lumv1->lmm_objects[0]));
+ }
+
+ if (obj_count != 0)
+ comp->llc_stripe_offset =
+ comp->llc_objects[0].l_ost_idx;
+
+ comp->llc_ondisk = true;
+ list_add_tail(&comp->llc_list, &layout->llot_comp_list);
+ layout->llot_cur_comp = comp;
+ }
+out:
+ if (lum != lov_xattr)
+ free(lum);
return layout;
+out_layout:
+ llapi_layout_free(layout);
+ layout = NULL;
+ goto out;
+}
+
+__u32 llapi_pattern_to_lov(uint64_t pattern)
+{
+ __u32 lov_pattern;
+
+ switch (pattern) {
+ case LLAPI_LAYOUT_DEFAULT:
+ lov_pattern = LOV_PATTERN_RAID0;
+ break;
+ case LLAPI_LAYOUT_RAID0:
+ lov_pattern = LOV_PATTERN_RAID0;
+ break;
+ case LLAPI_LAYOUT_MDT:
+ lov_pattern = LOV_PATTERN_MDT;
+ break;
+ case LLAPI_LAYOUT_OVERSTRIPING:
+ lov_pattern = LOV_PATTERN_OVERSTRIPING | LOV_PATTERN_RAID0;
+ break;
+ default:
+ lov_pattern = EINVAL;
+ }
+
+ return lov_pattern;
}
/**
- * Copy the data from a llapi_layout to a newly allocated lov_user_md.
- *
+ * Convert the data from a llapi_layout to a newly allocated lov_user_md.
* The caller is responsible for freeing the returned pointer.
*
- * The current version of this API doesn't support specifying the OST
- * index of arbitrary stripes, only stripe 0 via lmm_stripe_offset.
- * There is therefore no need to copy the lmm_objects array.
- *
* \param[in] layout the layout to copy from
*
* \retval valid lov_user_md pointer on success
static struct lov_user_md *
llapi_layout_to_lum(const struct llapi_layout *layout)
{
- struct lov_user_md *lum;
- size_t lum_size;
- uint32_t magic = LOV_USER_MAGIC_V1;
- uint64_t pattern = layout->llot_pattern;
- struct lov_user_ost_data *lmm_objects;
- int obj_count = 0, i;
-
- if ((pattern & LLAPI_LAYOUT_SPECIFIC) != 0) {
- if (layout->llot_objects_count < layout->llot_stripe_count) {
- errno = EINVAL;
- return NULL;
- }
- magic = LOV_USER_MAGIC_SPECIFIC;
- obj_count = layout->llot_stripe_count;
- pattern &= ~LLAPI_LAYOUT_SPECIFIC;
- } else if (strlen(layout->llot_pool_name) != 0) {
- magic = LOV_USER_MAGIC_V3;
+ struct llapi_layout_comp *comp;
+ struct lov_comp_md_v1 *comp_v1 = NULL;
+ struct lov_comp_md_entry_v1 *ent;
+ struct lov_user_md *lum = NULL;
+ size_t lum_size = 0;
+ int ent_idx = 0;
+ uint32_t offset = 0;
+
+ if (layout == NULL ||
+ list_empty((struct list_head *)&layout->llot_comp_list)) {
+ errno = EINVAL;
+ return NULL;
}
- /*
- * All stripes must be specified when the pattern contains
- * LLAPI_LAYOUT_SPECIFIC
- */
- for (i = 0; i < obj_count; i++) {
- if (layout->llot_objects[i].l_ost_idx ==
- LLAPI_LAYOUT_IDX_MAX) {
- errno = EINVAL;
+ /* Allocate header of lov_comp_md_v1 if necessary */
+ if (layout->llot_is_composite) {
+ int comp_cnt = 0;
+
+ list_for_each_entry(comp, &layout->llot_comp_list, llc_list)
+ comp_cnt++;
+
+ lum_size = sizeof(*comp_v1) + comp_cnt * sizeof(*ent);
+ lum = calloc(lum_size, 1);
+ if (lum == NULL) {
+ errno = ENOMEM;
return NULL;
}
+ comp_v1 = (struct lov_comp_md_v1 *)lum;
+ 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 = layout->llot_flags;
+ comp_v1->lcm_entry_count = comp_cnt;
+ comp_v1->lcm_mirror_count = layout->llot_mirror_count - 1;
+ offset += lum_size;
}
- lum_size = lov_user_md_size(obj_count, magic);
- lum = malloc(lum_size);
- if (lum == NULL)
- return NULL;
-
- lum->lmm_magic = magic;
+ list_for_each_entry(comp, &layout->llot_comp_list, llc_list) {
+ struct lov_user_md *blob;
+ size_t blob_size;
+ uint32_t magic;
+ int i, obj_count = 0;
+ struct lov_user_ost_data *lmm_objects;
+ uint64_t pattern = comp->llc_pattern;
+
+ if ((pattern & LLAPI_LAYOUT_SPECIFIC) != 0) {
+ if (comp->llc_objects_count <
+ comp->llc_stripe_count) {
+ errno = EINVAL;
+ goto error;
+ }
+ magic = LOV_USER_MAGIC_SPECIFIC;
+ obj_count = comp->llc_stripe_count;
+ pattern &= ~LLAPI_LAYOUT_SPECIFIC;
+ } else if (strlen(comp->llc_pool_name) != 0) {
+ magic = LOV_USER_MAGIC_V3;
+ } else {
+ magic = LOV_USER_MAGIC_V1;
+ }
+ /* All stripes must be specified when the pattern contains
+ * LLAPI_LAYOUT_SPECIFIC */
+ for (i = 0; i < obj_count; i++) {
+ if (comp->llc_objects[i].l_ost_idx ==
+ LLAPI_LAYOUT_IDX_MAX) {
+ errno = EINVAL;
+ goto error;
+ }
+ }
- if (pattern == LLAPI_LAYOUT_DEFAULT)
- lum->lmm_pattern = 0;
- else if (pattern == LLAPI_LAYOUT_RAID0)
- lum->lmm_pattern = LOV_PATTERN_RAID0;
- else
- lum->lmm_pattern = pattern;
+ blob_size = lov_user_md_size(obj_count, magic);
+ blob = realloc(lum, lum_size + blob_size);
+ if (blob == NULL) {
+ errno = ENOMEM;
+ goto error;
+ } else {
+ lum = blob;
+ comp_v1 = (struct lov_comp_md_v1 *)lum;
+ blob = (struct lov_user_md *)((char *)lum + lum_size);
+ lum_size += blob_size;
+ }
- if (layout->llot_stripe_size == LLAPI_LAYOUT_DEFAULT)
- lum->lmm_stripe_size = 0;
- else
- lum->lmm_stripe_size = layout->llot_stripe_size;
+ blob->lmm_magic = magic;
+ blob->lmm_pattern = llapi_pattern_to_lov(pattern);
+ if (blob->lmm_pattern == EINVAL) {
+ errno = EINVAL;
+ goto error;
+ }
- if (layout->llot_stripe_count == LLAPI_LAYOUT_DEFAULT)
- lum->lmm_stripe_count = 0;
- else if (layout->llot_stripe_count == LLAPI_LAYOUT_WIDE)
- lum->lmm_stripe_count = LOV_ALL_STRIPES;
- else
- lum->lmm_stripe_count = layout->llot_stripe_count;
+ if (comp->llc_stripe_size == LLAPI_LAYOUT_DEFAULT)
+ blob->lmm_stripe_size = 0;
+ else
+ blob->lmm_stripe_size = comp->llc_stripe_size;
- if (layout->llot_stripe_offset == LLAPI_LAYOUT_DEFAULT)
- lum->lmm_stripe_offset = -1;
- else
- lum->lmm_stripe_offset = layout->llot_stripe_offset;
+ if (comp->llc_stripe_count == LLAPI_LAYOUT_DEFAULT)
+ blob->lmm_stripe_count = 0;
+ else if (comp->llc_stripe_count == LLAPI_LAYOUT_WIDE)
+ blob->lmm_stripe_count = LOV_ALL_STRIPES;
+ else
+ blob->lmm_stripe_count = comp->llc_stripe_count;
- if (magic == LOV_USER_MAGIC_V3 || magic == LOV_USER_MAGIC_SPECIFIC) {
- struct lov_user_md_v3 *lumv3 = (struct lov_user_md_v3 *)lum;
+ if (comp->llc_stripe_offset == LLAPI_LAYOUT_DEFAULT)
+ blob->lmm_stripe_offset = -1;
+ else
+ blob->lmm_stripe_offset = comp->llc_stripe_offset;
+
+ if (magic == LOV_USER_MAGIC_V3 ||
+ magic == LOV_USER_MAGIC_SPECIFIC) {
+ struct lov_user_md_v3 *lumv3 =
+ (struct lov_user_md_v3 *)blob;
+
+ if (comp->llc_pool_name[0] != '\0') {
+ strncpy(lumv3->lmm_pool_name,
+ comp->llc_pool_name,
+ sizeof(lumv3->lmm_pool_name));
+ } else {
+ memset(lumv3->lmm_pool_name, 0,
+ sizeof(lumv3->lmm_pool_name));
+ }
+ lmm_objects = lumv3->lmm_objects;
+ } else {
+ lmm_objects = blob->lmm_objects;
+ }
- if (strlen(layout->llot_pool_name)) {
- strncpy(lumv3->lmm_pool_name, layout->llot_pool_name,
- sizeof(lumv3->lmm_pool_name));
+ for (i = 0; i < obj_count; i++)
+ lmm_objects[i].l_ost_idx =
+ comp->llc_objects[i].l_ost_idx;
+
+ if (layout->llot_is_composite) {
+ ent = &comp_v1->lcm_entries[ent_idx];
+ ent->lcme_id = comp->llc_id;
+ ent->lcme_flags = comp->llc_flags;
+ if (ent->lcme_flags & LCME_FL_NOSYNC)
+ ent->lcme_timestamp = comp->llc_timestamp;
+ ent->lcme_extent.e_start = comp->llc_extent.e_start;
+ ent->lcme_extent.e_end = comp->llc_extent.e_end;
+ ent->lcme_size = blob_size;
+ ent->lcme_offset = offset;
+ offset += blob_size;
+ comp_v1->lcm_size += blob_size;
+ ent_idx++;
} else {
- memset(lumv3->lmm_pool_name, 0, LOV_MAXPOOLNAME);
+ break;
}
- lmm_objects = lumv3->lmm_objects;
- } else {
- lmm_objects = lum->lmm_objects;
}
- for (i = 0; i < obj_count; i++)
- lmm_objects[i].l_ost_idx = layout->llot_objects[i].l_ost_idx;
-
return lum;
+error:
+ free(lum);
+ return NULL;
}
/**
{
char *p;
- strncpy(buf, path, size);
+ strncpy(buf, path, size - 1);
p = strrchr(buf, '/');
- if (p != NULL)
+ if (p != NULL) {
*p = '\0';
- else if (size >= 2)
+ } else if (size >= 2) {
strncpy(buf, ".", 2);
+ buf[size - 1] = '\0';
+ }
}
/**
- * Substitute unspecified attribute values in \a dest with
- * values from \a src.
+ * Substitute unspecified attribute values in \a layout with values
+ * from fs global settings. (lov.stripesize, lov.stripecount,
+ * lov.stripeoffset)
*
- * \param[in] src layout to inherit values from
- * \param[in] dest layout to receive inherited values
+ * \param[in] layout layout to inherit values from
+ * \param[in] path file path of the filesystem
*/
-static void inherit_layout_attributes(const struct llapi_layout *src,
- struct llapi_layout *dest)
+static void inherit_sys_attributes(struct llapi_layout *layout,
+ const char *path)
{
- if (dest->llot_pattern == LLAPI_LAYOUT_DEFAULT)
- dest->llot_pattern = src->llot_pattern;
-
- if (dest->llot_stripe_size == LLAPI_LAYOUT_DEFAULT)
- dest->llot_stripe_size = src->llot_stripe_size;
-
- if (dest->llot_stripe_count == LLAPI_LAYOUT_DEFAULT)
- dest->llot_stripe_count = src->llot_stripe_count;
+ struct llapi_layout_comp *comp;
+ unsigned int ssize, scount, soffset;
+ int rc;
- if (dest->llot_stripe_offset == LLAPI_LAYOUT_DEFAULT)
- dest->llot_stripe_offset = src->llot_stripe_offset;
+ rc = sattr_cache_get_defaults(NULL, path, &scount, &ssize, &soffset);
+ if (rc)
+ return;
+
+ list_for_each_entry(comp, &layout->llot_comp_list, llc_list) {
+ if (comp->llc_pattern == LLAPI_LAYOUT_DEFAULT)
+ comp->llc_pattern = LLAPI_LAYOUT_RAID0;
+ if (comp->llc_stripe_size == LLAPI_LAYOUT_DEFAULT)
+ comp->llc_stripe_size = ssize;
+ if (comp->llc_stripe_count == LLAPI_LAYOUT_DEFAULT)
+ comp->llc_stripe_count = scount;
+ if (comp->llc_stripe_offset == LLAPI_LAYOUT_DEFAULT)
+ comp->llc_stripe_offset = soffset;
+ }
}
/**
- * Test if all attributes of \a layout are specified.
+ * Get the current component of \a layout.
*
- * \param[in] layout the layout to check
+ * \param[in] layout layout to get current component
*
- * \retval true all attributes are specified
- * \retval false at least one attribute is unspecified
+ * \retval valid llapi_layout_comp pointer on success
+ * \retval NULL on error
*/
-static bool is_fully_specified(const struct llapi_layout *layout)
+static struct llapi_layout_comp *
+__llapi_layout_cur_comp(const struct llapi_layout *layout)
{
- return layout->llot_pattern != LLAPI_LAYOUT_DEFAULT &&
- layout->llot_stripe_size != LLAPI_LAYOUT_DEFAULT &&
- layout->llot_stripe_count != LLAPI_LAYOUT_DEFAULT;
+ struct llapi_layout_comp *comp;
+
+ if (layout == NULL || layout->llot_magic != LLAPI_LAYOUT_MAGIC) {
+ errno = EINVAL;
+ return NULL;
+ }
+ if (layout->llot_cur_comp == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+ /* Verify data consistency */
+ list_for_each_entry(comp, &layout->llot_comp_list, llc_list)
+ if (comp == layout->llot_cur_comp)
+ return comp;
+ errno = EFAULT;
+ return NULL;
}
/**
- * Allocate and initialize a new layout.
+ * Test if any attributes of \a layout are specified.
*
- * \retval valid llapi_layout pointer on success
- * \retval NULL if memory allocation fails
+ * \param[in] layout the layout to check
+ *
+ * \retval true any attributes are specified
+ * \retval false all attributes are unspecified
*/
-struct llapi_layout *llapi_layout_alloc(void)
+static bool is_any_specified(const struct llapi_layout *layout)
{
- struct llapi_layout *layout;
+ struct llapi_layout_comp *comp;
- layout = __llapi_layout_alloc(0);
- if (layout == NULL)
- return layout;
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return false;
- /* Set defaults. */
- layout->llot_magic = LLAPI_LAYOUT_MAGIC;
- layout->llot_pattern = LLAPI_LAYOUT_DEFAULT;
- layout->llot_stripe_size = LLAPI_LAYOUT_DEFAULT;
- layout->llot_stripe_count = LLAPI_LAYOUT_DEFAULT;
- layout->llot_stripe_offset = LLAPI_LAYOUT_DEFAULT;
- layout->llot_pool_name[0] = '\0';
+ if (layout->llot_is_composite || layout->llot_mirror_count != 1)
+ return true;
- return layout;
+ return comp->llc_pattern != LLAPI_LAYOUT_DEFAULT ||
+ comp->llc_stripe_size != LLAPI_LAYOUT_DEFAULT ||
+ comp->llc_stripe_count != LLAPI_LAYOUT_DEFAULT ||
+ comp->llc_stripe_offset != LLAPI_LAYOUT_DEFAULT ||
+ strlen(comp->llc_pool_name);
}
/**
- * Check if the given \a lum_size is large enough to hold the required
- * fields in \a lum.
- *
- * \param[in] lum the struct lov_user_md to check
- * \param[in] lum_size the number of bytes in \a lum
- *
- * \retval true the \a lum_size is too small
- * \retval false the \a lum_size is large enough
- */
-static bool llapi_layout_lum_truncated(struct lov_user_md *lum, size_t lum_size)
-{
- uint32_t magic;
-
- if (lum_size < lov_user_md_size(0, LOV_MAGIC_V1))
- return false;
-
- if (lum->lmm_magic == __swab32(LOV_MAGIC_V1) ||
- lum->lmm_magic == __swab32(LOV_MAGIC_V3))
- magic = __swab32(lum->lmm_magic);
- else
- magic = lum->lmm_magic;
-
- return lum_size < lov_user_md_size(0, magic);
-}
-
-/**
- * Compute the number of elements in the lmm_objects array of \a lum
- * with size \a lum_size.
- *
- * \param[in] lum the struct lov_user_md to check
- * \param[in] lum_size the number of bytes in \a lum
- *
- * \retval number of elements in array lum->lmm_objects
- */
-static int llapi_layout_objects_in_lum(struct lov_user_md *lum, size_t lum_size)
-{
- uint32_t magic;
- size_t base_size;
-
- if (lum_size < lov_user_md_size(0, LOV_MAGIC_V1))
- return 0;
-
- if (lum->lmm_magic == __swab32(LOV_MAGIC_V1) ||
- lum->lmm_magic == __swab32(LOV_MAGIC_V3))
- magic = __swab32(lum->lmm_magic);
- else
- magic = lum->lmm_magic;
-
- base_size = lov_user_md_size(0, magic);
-
- if (lum_size <= base_size)
- return 0;
- else
- return (lum_size - base_size) / sizeof(lum->lmm_objects[0]);
-}
-
-/**
- * Get the striping layout for the file referenced by file descriptor \a fd.
+ * Get the striping layout for the file referenced by file descriptor \a fd.
*
* If the filesystem does not support the "lustre." xattr namespace, the
* file must be on a non-Lustre filesystem, so set errno to ENOTTY per
struct lov_user_md *lum;
struct llapi_layout *layout = NULL;
ssize_t bytes_read;
- int object_count;
- int lum_stripe_count;
struct stat st;
- bool need_swab;
lum_len = XATTR_SIZE_MAX;
lum = malloc(lum_len);
goto out;
}
- /* Return an error if we got back a partial layout. */
- if (llapi_layout_lum_truncated(lum, bytes_read)) {
- errno = EINTR;
- goto out;
- }
-
- object_count = llapi_layout_objects_in_lum(lum, bytes_read);
-
- need_swab = lum->lmm_magic == __swab32(LOV_MAGIC_V1) ||
- lum->lmm_magic == __swab32(LOV_MAGIC_V3);
-
- if (need_swab)
- lum_stripe_count = __swab16(lum->lmm_stripe_count);
- else
- lum_stripe_count = lum->lmm_stripe_count;
-
/* Directories may have a positive non-zero lum->lmm_stripe_count
* yet have an empty lum->lmm_objects array. For non-directories the
* amount of data returned from the kernel must be consistent
if (fstat(fd, &st) < 0)
goto out;
- if (!S_ISDIR(st.st_mode) && object_count != lum_stripe_count) {
- errno = EINTR;
- goto out;
- }
-
- if (need_swab)
- llapi_layout_swab_lov_user_md(lum, object_count);
-
- layout = llapi_layout_from_lum(lum, object_count);
-
+ layout = llapi_layout_get_by_xattr(lum, bytes_read,
+ S_ISDIR(st.st_mode) ? 0 : LLAPI_LXF_CHECK);
out:
free(lum);
return layout;
static struct llapi_layout *llapi_layout_expected(const char *path)
{
struct llapi_layout *path_layout = NULL;
- struct llapi_layout *donor_layout;
char donor_path[PATH_MAX];
struct stat st;
int fd;
return NULL;
}
- if (is_fully_specified(path_layout))
+ if (is_any_specified(path_layout)) {
+ inherit_sys_attributes(path_layout, path);
return path_layout;
+ }
+
+ llapi_layout_free(path_layout);
rc = stat(path, &st);
- if (rc < 0 && errno != ENOENT) {
- llapi_layout_free(path_layout);
+ if (rc < 0 && errno != ENOENT)
return NULL;
- }
- /* If path is a not a directory or doesn't exist, inherit unspecified
- * attributes from parent directory. */
+ /* If path is a not a directory or doesn't exist, inherit layout
+ * from parent directory. */
if ((rc == 0 && !S_ISDIR(st.st_mode)) ||
(rc < 0 && errno == ENOENT)) {
get_parent_dir(path, donor_path, sizeof(donor_path));
- donor_layout = llapi_layout_get_by_path(donor_path, 0);
- if (donor_layout != NULL) {
- inherit_layout_attributes(donor_layout, path_layout);
- llapi_layout_free(donor_layout);
- if (is_fully_specified(path_layout))
+ path_layout = llapi_layout_get_by_path(donor_path, 0);
+ if (path_layout != NULL) {
+ if (is_any_specified(path_layout)) {
+ inherit_sys_attributes(path_layout, donor_path);
return path_layout;
+ }
+ llapi_layout_free(path_layout);
}
}
- /* Inherit remaining unspecified attributes from the filesystem root. */
+ /* Inherit layout from the filesystem root. */
rc = llapi_search_mounts(path, 0, donor_path, NULL);
- if (rc < 0) {
- llapi_layout_free(path_layout);
+ if (rc < 0)
return NULL;
- }
- donor_layout = llapi_layout_get_by_path(donor_path, 0);
- if (donor_layout == NULL) {
- llapi_layout_free(path_layout);
+ path_layout = llapi_layout_get_by_path(donor_path, 0);
+ if (path_layout == NULL)
return NULL;
- }
-
- inherit_layout_attributes(donor_layout, path_layout);
- llapi_layout_free(donor_layout);
+ inherit_sys_attributes(path_layout, donor_path);
return path_layout;
}
* \retval NULL if an error occurs
*/
struct llapi_layout *llapi_layout_get_by_fid(const char *lustre_dir,
- const lustre_fid *fid,
+ const struct lu_fid *fid,
uint32_t flags)
{
int fd;
}
/**
- * Free memory allocated for \a layout.
- *
- * \param[in] layout previously allocated by llapi_layout_alloc()
- */
-void llapi_layout_free(struct llapi_layout *layout)
-{
- if (layout->llot_objects != NULL)
- free(layout->llot_objects);
- free(layout);
-}
-
-/**
* Get the stripe count of \a layout.
*
* \param[in] layout layout to get stripe count from
int llapi_layout_stripe_count_get(const struct llapi_layout *layout,
uint64_t *count)
{
- if (layout == NULL || count == NULL ||
- layout->llot_magic != LLAPI_LAYOUT_MAGIC) {
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (count == NULL) {
errno = EINVAL;
return -1;
}
- *count = layout->llot_stripe_count;
+
+ *count = comp->llc_stripe_count;
+
return 0;
}
llapi_stripe_count_is_valid(stripe_count));
}
+static bool llapi_layout_extension_size_is_valid(uint64_t ext_size)
+{
+ return (ext_size != 0 &&
+ llapi_stripe_size_is_aligned(ext_size) &&
+ !llapi_stripe_size_is_too_big(ext_size));
+}
+
static bool llapi_layout_stripe_size_is_valid(uint64_t stripe_size)
{
return stripe_size == LLAPI_LAYOUT_DEFAULT ||
int llapi_layout_stripe_count_set(struct llapi_layout *layout,
uint64_t count)
{
- if (layout == NULL || layout->llot_magic != LLAPI_LAYOUT_MAGIC ||
- !llapi_layout_stripe_count_is_valid(count)) {
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (!llapi_layout_stripe_count_is_valid(count)) {
errno = EINVAL;
return -1;
}
- layout->llot_stripe_count = count;
+ comp->llc_stripe_count = count;
return 0;
}
/**
- * Get the stripe size of \a layout.
+ * Get the stripe/extension size of \a layout.
*
* \param[in] layout layout to get stripe size from
* \param[out] size integer to store stripe size in
+ * \param[in] extension flag if extenion size is requested
*
* \retval 0 on success
* \retval -1 if arguments are invalid
*/
-int llapi_layout_stripe_size_get(const struct llapi_layout *layout,
- uint64_t *size)
+static int layout_stripe_size_get(const struct llapi_layout *layout,
+ uint64_t *size, bool extension)
{
- if (layout == NULL || size == NULL ||
- layout->llot_magic != LLAPI_LAYOUT_MAGIC) {
+ struct llapi_layout_comp *comp;
+ int comp_ext;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (size == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ comp_ext = comp->llc_flags & LCME_FL_EXTENSION;
+ if ((comp_ext && !extension) || (!comp_ext && extension)) {
errno = EINVAL;
return -1;
}
- *size = layout->llot_stripe_size;
+ *size = comp->llc_stripe_size;
+ if (comp->llc_flags & LCME_FL_EXTENSION)
+ *size *= SEL_UNIT_SIZE;
return 0;
}
+int llapi_layout_stripe_size_get(const struct llapi_layout *layout,
+ uint64_t *size)
+{
+ return layout_stripe_size_get(layout, size, false);
+}
+
+int llapi_layout_extension_size_get(const struct llapi_layout *layout,
+ uint64_t *size)
+{
+ return layout_stripe_size_get(layout, size, true);
+}
+
/**
- * Set the stripe size of \a layout.
+ * Set the stripe/extension size of \a layout.
*
* \param[in] layout layout to set stripe size in
* \param[in] size value to be set
+ * \param[in] extension flag if extenion size is passed
*
* \retval 0 on success
* \retval -1 if arguments are invalid
*/
-int llapi_layout_stripe_size_set(struct llapi_layout *layout,
- uint64_t size)
+static int layout_stripe_size_set(struct llapi_layout *layout,
+ uint64_t size, bool extension)
{
- if (layout == NULL || layout->llot_magic != LLAPI_LAYOUT_MAGIC ||
- !llapi_layout_stripe_size_is_valid(size)) {
+ struct llapi_layout_comp *comp;
+ int comp_ext;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ comp_ext = comp->llc_flags & LCME_FL_EXTENSION;
+ if ((comp_ext && !extension) || (!comp_ext && extension)) {
errno = EINVAL;
return -1;
}
- layout->llot_stripe_size = size;
+ if (comp_ext)
+ size /= SEL_UNIT_SIZE;
+
+ if ((comp_ext && !llapi_layout_extension_size_is_valid(size)) ||
+ (!comp_ext && !llapi_layout_stripe_size_is_valid(size))) {
+ errno = EINVAL;
+ return -1;
+ }
+ comp->llc_stripe_size = size;
return 0;
}
+int llapi_layout_stripe_size_set(struct llapi_layout *layout,
+ uint64_t size)
+{
+ return layout_stripe_size_set(layout, size, false);
+}
+
+int llapi_layout_extension_size_set(struct llapi_layout *layout,
+ uint64_t size)
+{
+ return layout_stripe_size_set(layout, size, true);
+}
+
/**
* Get the RAID pattern of \a layout.
*
int llapi_layout_pattern_get(const struct llapi_layout *layout,
uint64_t *pattern)
{
- if (layout == NULL || pattern == NULL ||
- layout->llot_magic != LLAPI_LAYOUT_MAGIC) {
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (pattern == NULL) {
errno = EINVAL;
return -1;
}
- *pattern = layout->llot_pattern;
+ *pattern = comp->llc_pattern;
return 0;
}
/**
- * 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
*/
int llapi_layout_pattern_set(struct llapi_layout *layout, uint64_t pattern)
{
- if (layout == NULL || layout->llot_magic != LLAPI_LAYOUT_MAGIC) {
- errno = EINVAL;
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
return -1;
- }
if (pattern != LLAPI_LAYOUT_DEFAULT &&
- pattern != LLAPI_LAYOUT_RAID0) {
+ pattern != LLAPI_LAYOUT_RAID0 && pattern != LLAPI_LAYOUT_MDT
+ && pattern != LLAPI_LAYOUT_OVERSTRIPING) {
errno = EOPNOTSUPP;
return -1;
}
- layout->llot_pattern = pattern |
- (layout->llot_pattern & LLAPI_LAYOUT_SPECIFIC);
+ comp->llc_pattern = pattern |
+ (comp->llc_pattern & LLAPI_LAYOUT_SPECIFIC);
return 0;
}
int llapi_layout_ost_index_set(struct llapi_layout *layout, int stripe_number,
uint64_t ost_index)
{
- if (layout == NULL || layout->llot_magic != LLAPI_LAYOUT_MAGIC) {
- errno = EINVAL;
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
return -1;
- }
+
if (!llapi_layout_stripe_index_is_valid(ost_index)) {
errno = EINVAL;
return -1;
}
if (stripe_number == 0 && ost_index == LLAPI_LAYOUT_DEFAULT) {
- layout->llot_stripe_offset = ost_index;
- layout->llot_pattern &= ~LLAPI_LAYOUT_SPECIFIC;
- __llapi_layout_objects_realloc(layout, 0);
+ comp->llc_stripe_offset = ost_index;
+ comp->llc_pattern &= ~LLAPI_LAYOUT_SPECIFIC;
+ __llapi_comp_objects_realloc(comp, 0);
} else if (stripe_number >= 0 &&
stripe_number < LOV_MAX_STRIPE_COUNT) {
if (ost_index >= LLAPI_LAYOUT_IDX_MAX) {
}
/* Preallocate a few more stripes to avoid realloc() overhead.*/
- if (__llapi_layout_objects_realloc(layout,
+ if (__llapi_comp_objects_realloc(comp,
stripe_number_roundup(stripe_number)) < 0)
return -1;
- layout->llot_objects[stripe_number].l_ost_idx = ost_index;
+ comp->llc_objects[stripe_number].l_ost_idx = ost_index;
if (stripe_number == 0)
- layout->llot_stripe_offset = ost_index;
+ comp->llc_stripe_offset = ost_index;
else
- layout->llot_pattern |= LLAPI_LAYOUT_SPECIFIC;
+ comp->llc_pattern |= LLAPI_LAYOUT_SPECIFIC;
- if (layout->llot_stripe_count == LLAPI_LAYOUT_DEFAULT ||
- layout->llot_stripe_count <= stripe_number)
- layout->llot_stripe_count = stripe_number + 1;
+ if (comp->llc_stripe_count == LLAPI_LAYOUT_DEFAULT ||
+ comp->llc_stripe_count <= stripe_number)
+ comp->llc_stripe_count = stripe_number + 1;
} else {
errno = EINVAL;
return -1;
int llapi_layout_ost_index_get(const struct llapi_layout *layout,
uint64_t stripe_number, uint64_t *index)
{
- if (layout == NULL || layout->llot_magic != LLAPI_LAYOUT_MAGIC ||
- stripe_number >= layout->llot_stripe_count ||
- stripe_number >= layout->llot_objects_count || index == NULL) {
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (index == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (stripe_number >= comp->llc_stripe_count ||
+ stripe_number >= comp->llc_objects_count) {
errno = EINVAL;
return -1;
}
- if (layout->llot_stripe_offset == LLAPI_LAYOUT_DEFAULT)
+ if (comp->llc_stripe_offset == LLAPI_LAYOUT_DEFAULT)
*index = LLAPI_LAYOUT_DEFAULT;
else
- *index = layout->llot_objects[stripe_number].l_ost_idx;
+ *index = comp->llc_objects[stripe_number].l_ost_idx;
return 0;
}
int llapi_layout_pool_name_get(const struct llapi_layout *layout, char *dest,
size_t n)
{
- if (layout == NULL || layout->llot_magic != LLAPI_LAYOUT_MAGIC ||
- dest == NULL) {
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (dest == NULL) {
errno = EINVAL;
return -1;
}
- strncpy(dest, layout->llot_pool_name, n);
+ strncpy(dest, comp->llc_pool_name, n);
return 0;
}
int llapi_layout_pool_name_set(struct llapi_layout *layout,
const char *pool_name)
{
+ struct llapi_layout_comp *comp;
char *ptr;
- if (layout == NULL || layout->llot_magic != LLAPI_LAYOUT_MAGIC ||
- pool_name == NULL) {
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (pool_name == NULL) {
errno = EINVAL;
return -1;
}
return -1;
}
- strncpy(layout->llot_pool_name, pool_name,
- sizeof(layout->llot_pool_name));
+ strncpy(comp->llc_pool_name, pool_name, sizeof(comp->llc_pool_name));
return 0;
}
*
* \param[in] path name of the file to open
* \param[in] open_flags open() flags
- * \param[in] mode permissions to create new file with
+ * \param[in] mode permissions to create file, filtered by umask
* \param[in] layout layout to create new file with
*
* \retval non-negative file descriptor on successful open
return -1;
}
+ if (layout) {
+ rc = llapi_layout_sanity((struct llapi_layout *)layout, false,
+ !!(layout->llot_mirror_count > 1));
+ if (rc) {
+ llapi_layout_sanity_perror(rc);
+ return -1;
+ }
+ }
+
/* Object creation must be postponed until after layout attributes
* have been applied. */
if (layout != NULL && (open_flags & O_CREAT))
return -1;
}
- if (lum->lmm_magic == LOV_USER_MAGIC_SPECIFIC)
+ if (lum->lmm_magic == LOV_USER_MAGIC_COMP_V1)
+ lum_size = ((struct lov_comp_md_v1 *)lum)->lcm_size;
+ else if (lum->lmm_magic == LOV_USER_MAGIC_SPECIFIC)
lum_size = lov_user_md_size(lum->lmm_stripe_count,
lum->lmm_magic);
else
return llapi_layout_file_open(path, open_flags|O_CREAT|O_EXCL, mode,
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;
+}
+
+const char *llapi_layout_flags_string(uint32_t flags)
+{
+ switch (flags & LCM_FL_FLR_MASK) {
+ case LCM_FL_RDONLY:
+ return "ro";
+ case LCM_FL_WRITE_PENDING:
+ return "wp";
+ case LCM_FL_SYNC_PENDING:
+ return "sp";
+ }
+
+ return "0";
+}
+
+const __u16 llapi_layout_string_flags(char *string)
+{
+ if (strncmp(string, "ro", strlen(string)) == 0)
+ return LCM_FL_RDONLY;
+ if (strncmp(string, "wp", strlen(string)) == 0)
+ return LCM_FL_WRITE_PENDING;
+ if (strncmp(string, "sp", strlen(string)) == 0)
+ return LCM_FL_SYNC_PENDING;
+
+ 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.
+ *
+ * \param[in] layout the layout component
+ * \param[out] start extent start, inclusive
+ * \param[out] end extent end, exclusive
+ *
+ * \retval 0 on success
+ * \retval <0 if error occurs
+ */
+int llapi_layout_comp_extent_get(const struct llapi_layout *layout,
+ uint64_t *start, uint64_t *end)
+{
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (start == NULL || end == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ *start = comp->llc_extent.e_start;
+ *end = comp->llc_extent.e_end;
+
+ return 0;
+}
+
+/**
+ * Set the layout extent of a layout.
+ *
+ * \param[in] layout the layout to be set
+ * \param[in] start extent start, inclusive
+ * \param[in] end extent end, exclusive
+ *
+ * \retval 0 on success
+ * \retval <0 if error occurs
+ */
+int llapi_layout_comp_extent_set(struct llapi_layout *layout,
+ uint64_t start, uint64_t end)
+{
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (start > end) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ comp->llc_extent.e_start = start;
+ comp->llc_extent.e_end = end;
+ layout->llot_is_composite = true;
+
+ return 0;
+}
+
+/**
+ * Gets the attribute flags of the current component.
+ *
+ * \param[in] layout the layout component
+ * \param[out] flags stored the returned component flags
+ *
+ * \retval 0 on success
+ * \retval <0 if error occurs
+ */
+int llapi_layout_comp_flags_get(const struct llapi_layout *layout,
+ uint32_t *flags)
+{
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (flags == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ *flags = comp->llc_flags;
+
+ return 0;
+}
+
+/**
+ * Sets the specified flags of the current component leaving other flags as-is.
+ *
+ * \param[in] layout the layout component
+ * \param[in] flags component flags to be set
+ *
+ * \retval 0 on success
+ * \retval <0 if error occurs
+ */
+int llapi_layout_comp_flags_set(struct llapi_layout *layout, uint32_t flags)
+{
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ comp->llc_flags |= flags;
+
+ return 0;
+}
+
+/**
+ * Clears the flags specified in the flags leaving other flags as-is.
+ *
+ * \param[in] layout the layout component
+ * \param[in] flags component flags to be cleared
+ *
+ * \retval 0 on success
+ * \retval <0 if error occurs
+ */
+int llapi_layout_comp_flags_clear(struct llapi_layout *layout,
+ uint32_t flags)
+{
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ comp->llc_flags &= ~flags;
+
+ return 0;
+}
+
+/**
+ * Fetches the file-unique component ID of the current layout component.
+ *
+ * \param[in] layout the layout component
+ * \param[out] id stored the returned component ID
+ *
+ * \retval 0 on success
+ * \retval <0 if error occurs
+ */
+int llapi_layout_comp_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 = comp->llc_id;
+
+ return 0;
+}
+
+/**
+ * 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
+ * the newly added component, and it'll be turned into a composite
+ * layout if it was not before the adding.
+ *
+ * \param[in] layout existing composite or plain layout
+ *
+ * \retval 0 on success
+ * \retval <0 if error occurs
+ */
+int llapi_layout_comp_add(struct llapi_layout *layout)
+{
+ struct llapi_layout_comp *last, *comp, *new;
+ bool composite = layout->llot_is_composite;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ new = __llapi_comp_alloc(0);
+ if (new == NULL)
+ return -1;
+
+ last = list_entry(layout->llot_comp_list.prev, typeof(*last),
+ llc_list);
+
+ list_add_tail(&new->llc_list, &layout->llot_comp_list);
+
+ /* We must mark the layout composite for the sanity check, but it may
+ * not stay that way if the check fails */
+ layout->llot_is_composite = true;
+ layout->llot_cur_comp = new;
+
+ /* We need to set a temporary non-zero value for "end" when we call
+ * comp_extent_set, so we use LUSTRE_EOF-1, which is > all allowed
+ * for the end of the previous component. (If we're adding this
+ * component, the end of the previous component cannot be EOF.) */
+ if (llapi_layout_comp_extent_set(layout, last->llc_extent.e_end,
+ LUSTRE_EOF - 1)) {
+ llapi_layout_comp_del(layout);
+ layout->llot_is_composite = composite;
+ return -1;
+ }
+
+ return 0;
+}
+/**
+ * Adds a first component of a mirror to \a layout.
+ * The \a layout will change it's current component pointer to
+ * the newly added component, and it'll be turned into a composite
+ * layout if it was not before the adding.
+ *
+ * \param[in] layout existing composite or plain layout
+ *
+ * \retval 0 on success
+ * \retval <0 if error occurs
+ */
+int llapi_layout_add_first_comp(struct llapi_layout *layout)
+{
+ struct llapi_layout_comp *comp, *new;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ new = __llapi_comp_alloc(0);
+ if (new == NULL)
+ return -1;
+
+ new->llc_extent.e_start = 0;
+
+ list_add_tail(&new->llc_list, &layout->llot_comp_list);
+ layout->llot_cur_comp = new;
+ layout->llot_is_composite = true;
+
+ return 0;
+}
+
+/**
+ * Deletes current component from the composite layout. The component
+ * to be deleted must be the tail of components list, and it can't be
+ * the only component in the layout.
+ *
+ * \param[in] layout composite layout
+ *
+ * \retval 0 on success
+ * \retval <0 if error occurs
+ */
+int llapi_layout_comp_del(struct llapi_layout *layout)
+{
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (!layout->llot_is_composite) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* It must be the tail of the list (for PFL, can be relaxed
+ * once we get mirrored components) */
+ if (comp->llc_list.next != &layout->llot_comp_list) {
+ errno = EINVAL;
+ return -1;
+ }
+ layout->llot_cur_comp =
+ list_entry(comp->llc_list.prev, typeof(*comp), llc_list);
+ if (comp->llc_list.prev == &layout->llot_comp_list)
+ layout->llot_cur_comp = NULL;
+
+ list_del_init(&comp->llc_list);
+ __llapi_comp_free(comp);
+
+ return 0;
+}
+
+/**
+ * Move the current component pointer to the component with
+ * specified component ID.
+ *
+ * \param[in] layout composite layout
+ * \param[in] id component ID
+ *
+ * \retval =0 : moved successfully
+ * \retval <0 if error occurs
+ */
+int llapi_layout_comp_use_id(struct llapi_layout *layout, uint32_t comp_id)
+{
+ struct llapi_layout_comp *comp;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1; /* use previously set errno */
+
+ if (!layout->llot_is_composite) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (comp_id == LCME_ID_INVAL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ list_for_each_entry(comp, &layout->llot_comp_list, llc_list) {
+ if (comp->llc_id == comp_id) {
+ layout->llot_cur_comp = comp;
+ return 0;
+ }
+ }
+ errno = ENOENT;
+ return -1;
+}
+
+/**
+ * Move the current component pointer to a specified position.
+ *
+ * \param[in] layout composite layout
+ * \param[in] pos the position to be moved, it can be:
+ * LLAPI_LAYOUT_COMP_USE_FIRST: use first component
+ * LLAPI_LAYOUT_COMP_USE_LAST: use last component
+ * LLAPI_LAYOUT_COMP_USE_NEXT: use component after current
+ * LLAPI_LAYOUT_COMP_USE_PREV: use component before current
+ *
+ * \retval =0 : moved successfully
+ * \retval =1 : at last component with NEXT, at first component with PREV
+ * \retval <0 if error occurs
+ */
+int llapi_layout_comp_use(struct llapi_layout *layout,
+ enum llapi_layout_comp_use pos)
+{
+ struct llapi_layout_comp *comp, *head, *tail;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL)
+ return -1;
+
+ if (!layout->llot_is_composite) {
+ 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);
+ tail = list_entry(layout->llot_comp_list.prev, typeof(*tail), llc_list);
+ switch (pos) {
+ case LLAPI_LAYOUT_COMP_USE_FIRST:
+ layout->llot_cur_comp = head;
+ break;
+ case LLAPI_LAYOUT_COMP_USE_NEXT:
+ if (comp == tail) {
+ errno = ENOENT;
+ return 1;
+ }
+ layout->llot_cur_comp = list_entry(comp->llc_list.next,
+ typeof(*comp), llc_list);
+ break;
+ case LLAPI_LAYOUT_COMP_USE_LAST:
+ layout->llot_cur_comp = tail;
+ break;
+ case LLAPI_LAYOUT_COMP_USE_PREV:
+ if (comp == head) {
+ errno = ENOENT;
+ return 1;
+ }
+ layout->llot_cur_comp = list_entry(comp->llc_list.prev,
+ typeof(*comp), llc_list);
+ break;
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * Add layout component(s) to an existing file.
+ *
+ * \param[in] path The path name of the file
+ * \param[in] layout The layout component(s) to be added
+ */
+int llapi_layout_file_comp_add(const char *path,
+ const struct llapi_layout *layout)
+{
+ int rc, fd = -1, lum_size, tmp_errno = 0;
+ struct llapi_layout *existing_layout = NULL;
+ struct lov_user_md *lum = NULL;
+
+ if (path == NULL || layout == NULL ||
+ layout->llot_magic != LLAPI_LAYOUT_MAGIC) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ fd = open(path, O_RDWR);
+ if (fd < 0) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ existing_layout = llapi_layout_get_by_fd(fd, 0);
+ if (existing_layout == NULL) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ rc = llapi_layout_merge(&existing_layout, layout);
+ if (rc) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ rc = llapi_layout_sanity(existing_layout, false, false);
+ if (rc) {
+ tmp_errno = errno;
+ llapi_layout_sanity_perror(rc);
+ rc = -1;
+ goto out;
+ }
+
+ lum = llapi_layout_to_lum(layout);
+ if (lum == NULL) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ if (lum->lmm_magic != LOV_USER_MAGIC_COMP_V1) {
+ tmp_errno = EINVAL;
+ rc = -1;
+ goto out;
+ }
+ lum_size = ((struct lov_comp_md_v1 *)lum)->lcm_size;
+
+ rc = fsetxattr(fd, XATTR_LUSTRE_LOV".add", lum, lum_size, 0);
+ if (rc < 0) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+out:
+ if (fd >= 0)
+ close(fd);
+ free(lum);
+ llapi_layout_free(existing_layout);
+ errno = tmp_errno;
+ return rc;
+}
+
+/**
+ * Delete component(s) by the specified component id or component flags
+ * from an existing file.
+ *
+ * \param[in] path path name of the file
+ * \param[in] id unique component ID
+ * \param[in] flags flags: LCME_FL_* or;
+ * negative flags: (LCME_FL_NEG|LCME_FL_*)
+ */
+int llapi_layout_file_comp_del(const char *path, uint32_t id, uint32_t flags)
+{
+ int rc = 0, fd = -1, lum_size, tmp_errno = 0;
+ struct llapi_layout *layout;
+ struct llapi_layout_comp *comp, *next;
+ struct llapi_layout *existing_layout = NULL;
+ struct lov_user_md *lum = NULL;
+
+ if (path == NULL || id > LCME_ID_MAX || (flags & ~LCME_KNOWN_FLAGS)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* Can only specify ID or flags, not both, not none. */
+ if ((id != LCME_ID_INVAL && flags != 0) ||
+ (id == LCME_ID_INVAL && flags == 0)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ layout = llapi_layout_alloc();
+ if (layout == NULL)
+ return -1;
+
+ llapi_layout_comp_extent_set(layout, 0, LUSTRE_EOF);
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ comp->llc_id = id;
+ comp->llc_flags = flags;
+
+ lum = llapi_layout_to_lum(layout);
+ if (lum == NULL) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+ lum_size = ((struct lov_comp_md_v1 *)lum)->lcm_size;
+
+ fd = open(path, O_RDWR);
+ if (fd < 0) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ existing_layout = llapi_layout_get_by_fd(fd, 0);
+ if (existing_layout == NULL) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ comp = NULL;
+ next = NULL;
+ while (rc == 0 && existing_layout->llot_cur_comp != NULL) {
+ rc = llapi_layout_comp_use(existing_layout, comp ?
+ LLAPI_LAYOUT_COMP_USE_PREV :
+ LLAPI_LAYOUT_COMP_USE_LAST);
+ if (rc != 0)
+ break;
+
+ next = comp;
+ comp = __llapi_layout_cur_comp(existing_layout);
+ if (comp == NULL) {
+ rc = -1;
+ break;
+ }
+
+ if (id != LCME_ID_INVAL && id != comp->llc_id)
+ continue;
+ else if ((flags & LCME_FL_NEG) && (flags & comp->llc_flags))
+ continue;
+ else if (flags && !(flags & comp->llc_flags))
+ continue;
+
+ rc = llapi_layout_comp_del(existing_layout);
+ /* the layout position is moved to previous one, adjust */
+ comp = next;
+ }
+ if (rc < 0) {
+ tmp_errno = errno;
+ goto out;
+ }
+
+ rc = llapi_layout_sanity(existing_layout, false, false);
+ if (rc) {
+ tmp_errno = errno;
+ llapi_layout_sanity_perror(rc);
+ rc = -1;
+ goto out;
+ }
+
+ rc = fsetxattr(fd, XATTR_LUSTRE_LOV".del", lum, lum_size, 0);
+ if (rc < 0) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+out:
+ if (fd >= 0)
+ close(fd);
+ free(lum);
+ llapi_layout_free(layout);
+ llapi_layout_free(existing_layout);
+ errno = tmp_errno;
+
+ return rc;
+}
+
+/* Internal utility function to apply flags for sanity checking */
+static void llapi_layout_comp_apply_flags(struct llapi_layout_comp *comp,
+ uint32_t flags)
+{
+ if (flags & LCME_FL_NEG)
+ comp->llc_flags &= ~flags;
+ else
+ comp->llc_flags |= flags;
+}
+
+struct llapi_layout_apply_flags_args {
+ uint32_t *lfa_ids;
+ uint32_t *lfa_flags;
+ int lfa_count;
+ int lfa_rc;
+};
+
+
+static int llapi_layout_apply_flags_cb(struct llapi_layout *layout,
+ void *arg)
+{
+ struct llapi_layout_apply_flags_args *args = arg;
+ struct llapi_layout_comp *comp;
+ int i = 0;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL) {
+ args->lfa_rc = -1;
+ return LLAPI_LAYOUT_ITER_STOP;
+ }
+
+ for (i = 0; i < args->lfa_count; i++) {
+ if (comp->llc_id == args->lfa_ids[i])
+ llapi_layout_comp_apply_flags(comp, args->lfa_flags[i]);
+ }
+
+ return LLAPI_LAYOUT_ITER_CONT;
+}
+
+/* Apply flags to the layout for sanity checking */
+static int llapi_layout_apply_flags(struct llapi_layout *layout, uint32_t *ids,
+ uint32_t *flags, int count)
+{
+ struct llapi_layout_apply_flags_args args;
+ int rc = 0;
+
+ if (!ids || !flags || count == 0) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ args.lfa_ids = ids;
+ args.lfa_flags = flags;
+ args.lfa_count = count;
+ args.lfa_rc = 0;
+
+ rc = llapi_layout_comp_iterate(layout,
+ llapi_layout_apply_flags_cb,
+ &args);
+ if (errno == ENOENT)
+ errno = 0;
+
+ if (rc != LLAPI_LAYOUT_ITER_CONT)
+ rc = args.lfa_rc;
+
+ return rc;
+}
+/**
+ * Change flags by component ID of components of an existing file.
+ * The component to be modified is specified by the comp->lcme_id value,
+ * which must be a unique component ID.
+ *
+ * \param[in] path path name of the file
+ * \param[in] ids An array of component IDs
+ * \param[in] flags flags: LCME_FL_* or;
+ * negative flags: (LCME_FL_NEG|LCME_FL_*)
+ * \param[in] count Number of elements in ids and flags array
+ */
+int llapi_layout_file_comp_set(const char *path, uint32_t *ids, uint32_t *flags,
+ size_t count)
+{
+ int rc = -1, fd = -1, i, tmp_errno = 0;
+ size_t lum_size;
+ struct llapi_layout *existing_layout = NULL;
+ struct llapi_layout *layout = NULL;
+ struct llapi_layout_comp *comp;
+ struct lov_user_md *lum = NULL;
+
+ if (path == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (!count)
+ return 0;
+
+ for (i = 0; i < count; i++) {
+ if (!ids[i] || !flags[i]) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (ids[i] > LCME_ID_MAX || (flags[i] & ~LCME_KNOWN_FLAGS)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* do not allow to set or clear INIT flag */
+ if (flags[i] & LCME_FL_INIT) {
+ errno = EINVAL;
+ return -1;
+ }
+ }
+
+ fd = open(path, O_RDWR);
+ if (fd < 0) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ existing_layout = llapi_layout_get_by_fd(fd, 0);
+ if (existing_layout == NULL) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ if (llapi_layout_apply_flags(existing_layout, ids, flags, count)) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ rc = llapi_layout_sanity(existing_layout, false, false);
+ if (rc) {
+ tmp_errno = errno;
+ llapi_layout_sanity_perror(rc);
+ rc = -1;
+ goto out;
+ }
+
+ layout = __llapi_layout_alloc();
+ if (layout == NULL) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ layout->llot_is_composite = true;
+ for (i = 0; i < count; i++) {
+ comp = __llapi_comp_alloc(0);
+ if (comp == NULL) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ comp->llc_id = ids[i];
+ comp->llc_flags = flags[i];
+
+ list_add_tail(&comp->llc_list, &layout->llot_comp_list);
+ layout->llot_cur_comp = comp;
+ }
+
+ lum = llapi_layout_to_lum(layout);
+ if (lum == NULL) {
+ tmp_errno = errno;
+ rc = -1;
+ goto out;
+ }
+
+ lum_size = ((struct lov_comp_md_v1 *)lum)->lcm_size;
+
+ /* flush cached pages from clients */
+ rc = llapi_file_flush(fd);
+ if (rc) {
+ tmp_errno = -rc;
+ rc = -1;
+ goto out;
+ }
+
+ rc = fsetxattr(fd, XATTR_LUSTRE_LOV".set.flags", lum, lum_size, 0);
+ if (rc < 0) {
+ tmp_errno = errno;
+ goto out;
+ }
+
+ rc = 0;
+
+out:
+ if (fd >= 0)
+ close(fd);
+
+ free(lum);
+ llapi_layout_free(existing_layout);
+ llapi_layout_free(layout);
+ errno = tmp_errno;
+ return rc;
+}
+
+/**
+ * Check if the file layout is composite.
+ *
+ * \param[in] layout the file layout to check
+ *
+ * \retval true composite
+ * \retval false not composite
+ */
+bool llapi_layout_is_composite(struct llapi_layout *layout)
+{
+ return layout->llot_is_composite;
+}
+
+/**
+ * Iterate every components in the @layout and call callback function @cb.
+ *
+ * \param[in] layout component layout list.
+ * \param[in] cb callback for each component
+ * \param[in] cbdata callback data
+ *
+ * \retval < 0 error happens during the iteration
+ * \retval LLAPI_LAYOUT_ITER_CONT finished the iteration w/o error
+ * \retval LLAPI_LAYOUT_ITER_STOP got something, stop the iteration
+ */
+int llapi_layout_comp_iterate(struct llapi_layout *layout,
+ llapi_layout_iter_cb cb, void *cbdata)
+{
+ int rc;
+
+ rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_FIRST);
+ if (rc < 0)
+ return rc;
+
+ /**
+ * make sure on success llapi_layout_comp_use() API returns 0 with
+ * USE_FIRST.
+ */
+ assert(rc == 0);
+
+ while (1) {
+ rc = cb(layout, cbdata);
+ if (rc != LLAPI_LAYOUT_ITER_CONT)
+ break;
+
+ rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_NEXT);
+ if (rc < 0)
+ return rc;
+ else if (rc == 1) /* reached the last comp */
+ return LLAPI_LAYOUT_ITER_CONT;
+ }
+
+ return rc;
+}
+
+/**
+ * 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;
+}
+
+/**
+ * Find all stale components.
+ *
+ * \param[in] layout component layout list.
+ * \param[out] comp array of stale component info.
+ * \param[in] comp_size array size of @comp.
+ * \param[in] mirror_ids array of mirror id that only components
+ * belonging to these mirror will be collected.
+ * \param[in] ids_nr number of mirror ids array.
+ *
+ * \retval number of component info collected on sucess or
+ * an error code on failure.
+ */
+int llapi_mirror_find_stale(struct llapi_layout *layout,
+ struct llapi_resync_comp *comp, size_t comp_size,
+ __u16 *mirror_ids, int ids_nr)
+{
+ int idx = 0;
+ int rc;
+
+ rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_FIRST);
+ if (rc < 0)
+ goto error;
+
+ while (rc == 0) {
+ uint32_t id;
+ uint32_t mirror_id;
+ uint32_t flags;
+ uint64_t start, end;
+
+ rc = llapi_layout_comp_flags_get(layout, &flags);
+ if (rc < 0)
+ goto error;
+
+ if (!(flags & LCME_FL_STALE))
+ goto next;
+
+ rc = llapi_layout_mirror_id_get(layout, &mirror_id);
+ if (rc < 0)
+ goto error;
+
+ /* the caller only wants stale components from specific
+ * mirrors */
+ if (ids_nr > 0) {
+ int j;
+
+ for (j = 0; j < ids_nr; j++) {
+ if (mirror_ids[j] == mirror_id)
+ break;
+ }
+
+ /* not in the specified mirror */
+ if (j == ids_nr)
+ goto next;
+ } else if (flags & LCME_FL_NOSYNC) {
+ /* if not specified mirrors, do not resync "nosync"
+ * mirrors */
+ goto next;
+ }
+
+ rc = llapi_layout_comp_id_get(layout, &id);
+ if (rc < 0)
+ goto error;
+
+ rc = llapi_layout_comp_extent_get(layout, &start, &end);
+ if (rc < 0)
+ goto error;
+
+ /* pack this component into @comp array */
+ comp[idx].lrc_id = id;
+ comp[idx].lrc_mirror_id = mirror_id;
+ comp[idx].lrc_start = start;
+ comp[idx].lrc_end = end;
+ idx++;
+
+ if (idx >= comp_size) {
+ rc = -EINVAL;
+ goto error;
+ }
+
+ next:
+ rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_NEXT);
+ if (rc < 0) {
+ rc = -EINVAL;
+ goto error;
+ }
+ }
+error:
+ return rc < 0 ? rc : idx;
+}
+
+/* locate @layout to a valid component covering file [file_start, file_end) */
+uint32_t llapi_mirror_find(struct llapi_layout *layout,
+ uint64_t file_start, uint64_t file_end,
+ uint64_t *endp)
+{
+ uint32_t mirror_id = 0;
+ int rc;
+
+ rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_FIRST);
+ if (rc < 0)
+ return rc;
+
+ *endp = 0;
+ while (rc == 0) {
+ uint64_t start, end;
+ uint32_t flags, id, rid;
+
+ rc = llapi_layout_comp_flags_get(layout, &flags);
+ if (rc < 0)
+ return rc;
+
+ if (flags & LCME_FL_STALE)
+ goto next;
+
+ rc = llapi_layout_mirror_id_get(layout, &rid);
+ if (rc < 0)
+ return rc;
+
+ rc = llapi_layout_comp_id_get(layout, &id);
+ if (rc < 0)
+ return rc;
+
+ rc = llapi_layout_comp_extent_get(layout, &start, &end);
+ if (rc < 0)
+ return rc;
+
+ if (file_start >= start && file_start < end) {
+ if (!mirror_id)
+ mirror_id = rid;
+ else if (mirror_id != rid || *endp != start)
+ break;
+
+ file_start = *endp = end;
+ if (end >= file_end)
+ break;
+ }
+
+ next:
+ rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_NEXT);
+ if (rc < 0)
+ return rc;
+ }
+
+ return mirror_id;
+}
+
+int llapi_mirror_resync_many(int fd, struct llapi_layout *layout,
+ struct llapi_resync_comp *comp_array,
+ int comp_size, uint64_t start, uint64_t end)
+{
+ uint64_t count;
+ size_t page_size = sysconf(_SC_PAGESIZE);
+ const size_t buflen = 4 << 20; /* 4M */
+ void *buf;
+ uint64_t pos = start;
+ int i;
+ int rc;
+ int rc2 = 0;
+
+ rc = posix_memalign(&buf, page_size, buflen);
+ if (rc)
+ return -rc;
+
+ if (end == OBD_OBJECT_EOF)
+ count = OBD_OBJECT_EOF;
+ else
+ count = end - start;
+
+ while (count > 0) {
+ uint32_t src;
+ uint64_t mirror_end = 0;
+ uint64_t bytes_left;
+ ssize_t bytes_read;
+ size_t to_read;
+ size_t to_write;
+
+ src = llapi_mirror_find(layout, pos, end, &mirror_end);
+ if (src == 0)
+ return -ENOENT;
+
+ if (mirror_end == OBD_OBJECT_EOF) {
+ bytes_left = count;
+ } else {
+ bytes_left = MIN(count, mirror_end - pos);
+ bytes_left = ((bytes_left - 1) | (page_size - 1)) + 1;
+ }
+ to_read = MIN(buflen, bytes_left);
+
+ bytes_read = llapi_mirror_read(fd, src, buf, to_read, pos);
+ if (bytes_read == 0) {
+ /* end of file */
+ break;
+ }
+ if (bytes_read < 0) {
+ rc = bytes_read;
+ break;
+ }
+
+ /* round up to page align to make direct IO happy. */
+ to_write = ((bytes_read - 1) | (page_size - 1)) + 1;
+
+ for (i = 0; i < comp_size; i++) {
+ ssize_t written;
+ off_t pos2 = pos;
+ size_t to_write2 = to_write;
+
+ /* skip non-overlapped component */
+ if (pos >= comp_array[i].lrc_end ||
+ pos + to_write <= comp_array[i].lrc_start)
+ continue;
+
+ if (pos < comp_array[i].lrc_start)
+ pos2 = comp_array[i].lrc_start;
+
+ to_write2 -= pos2 - pos;
+
+ if ((pos + to_write) > comp_array[i].lrc_end)
+ to_write2 -= pos + to_write -
+ comp_array[i].lrc_end;
+
+ written = llapi_mirror_write(fd,
+ comp_array[i].lrc_mirror_id,
+ buf + pos2 - pos,
+ to_write2, pos2);
+ if (written < 0) {
+ /**
+ * this component is not written successfully,
+ * mark it using its lrc_synced, it is supposed
+ * to be false before getting here.
+ *
+ * And before this function returns, all
+ * elements of comp_array will reverse their
+ * lrc_synced flag to reflect their true
+ * meanings.
+ */
+ comp_array[i].lrc_synced = true;
+ llapi_error(LLAPI_MSG_ERROR, written,
+ "component %u not synced",
+ comp_array[i].lrc_id);
+ if (rc2 == 0)
+ rc2 = (int)written;
+ continue;
+ }
+ assert(written == to_write2);
+ }
+
+ pos += bytes_read;
+ count -= bytes_read;
+ }
+
+ free(buf);
+
+ if (rc < 0) {
+ /* fatal error happens */
+ for (i = 0; i < comp_size; i++)
+ comp_array[i].lrc_synced = false;
+ return rc;
+ }
+
+ /**
+ * no fatal error happens, each lrc_synced tells whether the component
+ * has been resync successfully (note: we'd reverse the value to
+ * reflect its true meaning.
+ */
+ for (i = 0; i < comp_size; i++) {
+ comp_array[i].lrc_synced = !comp_array[i].lrc_synced;
+ if (comp_array[i].lrc_synced && pos & (page_size - 1)) {
+ rc = llapi_mirror_truncate(fd,
+ comp_array[i].lrc_mirror_id, pos);
+ if (rc < 0)
+ comp_array[i].lrc_synced = false;
+ }
+ }
+
+ /**
+ * returns the first error code for partially successful resync if
+ * possible.
+ */
+ return rc2;
+}
+
+enum llapi_layout_comp_sanity_error {
+ LSE_OK,
+ LSE_INCOMPLETE_MIRROR,
+ LSE_ADJACENT_EXTENSION,
+ LSE_INIT_EXTENSION,
+ LSE_FLAGS,
+ LSE_DOM_EXTENSION,
+ LSE_DOM_EXTENSION_FOLLOWING,
+ LSE_DOM_FIRST,
+ LSE_SET_COMP_START,
+ LSE_NOT_ZERO_LENGTH_EXTENDABLE,
+ LSE_END_NOT_GREATER,
+ LSE_ZERO_LENGTH_NORMAL,
+ LSE_NOT_ADJACENT_PREV,
+ LSE_START_GT_END,
+ LSE_ALIGN_END,
+ LSE_ALIGN_EXT,
+ LSE_LAST,
+};
+
+const char *llapi_layout_strerror[] =
+{
+ [LSE_OK] = "",
+ [LSE_INCOMPLETE_MIRROR] =
+ "Incomplete mirror - must go to EOF",
+ [LSE_ADJACENT_EXTENSION] =
+ "No adjacent extension space components",
+ [LSE_INIT_EXTENSION] =
+ "Cannot apply extension flag to init components",
+ [LSE_FLAGS] =
+ "Wrong flags",
+ [LSE_DOM_EXTENSION] =
+ "DoM components can't be extension space",
+ [LSE_DOM_EXTENSION_FOLLOWING] =
+ "DoM components cannot be followed by extension space",
+ [LSE_DOM_FIRST] =
+ "DoM component should be the first one in a file/mirror",
+ [LSE_SET_COMP_START] =
+ "Must set previous component extent before adding next",
+ [LSE_NOT_ZERO_LENGTH_EXTENDABLE] =
+ "Extendable component must start out zero-length",
+ [LSE_END_NOT_GREATER] =
+ "Component end is before end of previous component",
+ [LSE_ZERO_LENGTH_NORMAL] =
+ "Zero length components must be followed by extension",
+ [LSE_NOT_ADJACENT_PREV] =
+ "Components not adjacent (end != next->start",
+ [LSE_START_GT_END] =
+ "Component start is > end",
+ [LSE_ALIGN_END] =
+ "The component end must be aligned by the stripe size",
+ [LSE_ALIGN_EXT] =
+ "The extension size must be aligned by the stripe size",
+};
+
+struct llapi_layout_sanity_args {
+ bool lsa_incomplete;
+ bool lsa_flr;
+ bool lsa_ondisk;
+ int lsa_rc;
+};
+
+static int llapi_layout_sanity_cb(struct llapi_layout *layout,
+ void *arg)
+{
+ struct llapi_layout_comp *comp, *next, *prev;
+ struct llapi_layout_sanity_args *args = arg;
+ bool first_comp = false;
+
+ comp = __llapi_layout_cur_comp(layout);
+ if (comp == NULL) {
+ args->lsa_rc = -1;
+ goto out_err;
+ }
+
+ if (comp->llc_list.prev != &layout->llot_comp_list)
+ prev = list_entry(comp->llc_list.prev, typeof(*prev),
+ llc_list);
+ else
+ prev = NULL;
+
+ if (comp->llc_list.next != &layout->llot_comp_list)
+ next = list_entry(comp->llc_list.next, typeof(*next),
+ llc_list);
+ else
+ next = NULL;
+
+ /* Start of zero implies a new mirror */
+ if (comp->llc_extent.e_start == 0) {
+ first_comp = true;
+ /* Most checks apply only within one mirror, this is an
+ * exception. */
+ if (prev && prev->llc_extent.e_end != LUSTRE_EOF) {
+ args->lsa_rc = LSE_INCOMPLETE_MIRROR;
+ goto out_err;
+ }
+
+ prev = NULL;
+ }
+
+ if (next && next->llc_extent.e_start == 0)
+ next = NULL;
+
+ /* Flag sanity checks */
+ /* No adjacent extension components */
+ if ((comp->llc_flags & LCME_FL_EXTENSION) && next &&
+ (next->llc_flags & LCME_FL_EXTENSION)) {
+ args->lsa_rc = LSE_ADJACENT_EXTENSION;
+ goto out_err;
+ }
+
+ /* Extension flag cannot be applied to init components and the first
+ * component of each mirror is automatically init */
+ if ((comp->llc_flags & LCME_FL_EXTENSION) &&
+ (comp->llc_flags & LCME_FL_INIT || first_comp)) {
+ args->lsa_rc = LSE_INIT_EXTENSION;
+ goto out_err;
+ }
+
+ if (comp->llc_ondisk) {
+ if (comp->llc_flags & LCME_FL_NEG)
+ args->lsa_rc = LSE_FLAGS;
+ } else if (!args->lsa_incomplete) {
+ if (args->lsa_flr) {
+ if (comp->llc_flags & ~LCME_USER_COMP_FLAGS)
+ args->lsa_rc = LSE_FLAGS;
+ } else {
+ if (comp->llc_flags & ~LCME_FL_EXTENSION)
+ args->lsa_rc = LSE_FLAGS;
+ }
+ }
+ if (args->lsa_rc)
+ goto out_err;
+
+ /* DoM sanity checks */
+ if (comp->llc_pattern == LLAPI_LAYOUT_MDT ||
+ comp->llc_pattern == LOV_PATTERN_MDT) {
+ /* DoM components can't be extension components */
+ if (comp->llc_flags & LCME_FL_EXTENSION) {
+ args->lsa_rc = LSE_DOM_EXTENSION;
+ goto out_err;
+ }
+ /* DoM components cannot be followed by an extension comp */
+ if (next && (next->llc_flags & LCME_FL_EXTENSION)) {
+ args->lsa_rc = LSE_DOM_EXTENSION_FOLLOWING;
+ goto out_err;
+ }
+
+ /* DoM should be the first component in a mirror */
+ if (!first_comp) {
+ args->lsa_rc = LSE_DOM_FIRST;
+ errno = EINVAL;
+ goto out_err;
+ }
+ }
+
+ /* Extent sanity checks */
+ /* Must set previous component extent before adding another */
+ if (prev && prev->llc_extent.e_start == 0 &&
+ prev->llc_extent.e_end == 0) {
+ args->lsa_rc = LSE_SET_COMP_START;
+ goto out_err;
+ }
+
+ if (!args->lsa_incomplete) {
+ /* Components followed by extension space (extendable
+ * components) must be zero length before initialization.
+ * (Except for first comp, which will be initialized on
+ * creation). */
+ if (next && (next->llc_flags & LCME_FL_EXTENSION) &&
+ !first_comp && !(comp->llc_flags & LCME_FL_INIT) &&
+ comp->llc_extent.e_start != comp->llc_extent.e_end) {
+ args->lsa_rc = LSE_NOT_ZERO_LENGTH_EXTENDABLE;
+ goto out_err;
+ }
+
+ /* End must come after end of previous comp */
+ if (prev && comp->llc_extent.e_end < prev->llc_extent.e_end) {
+ args->lsa_rc = LSE_END_NOT_GREATER;
+ goto out_err;
+ }
+
+ /* Components not followed by ext space must have length > 0. */
+ if (comp->llc_extent.e_start == comp->llc_extent.e_end &&
+ (next == NULL || !(next->llc_flags & LCME_FL_EXTENSION))) {
+ args->lsa_rc = LSE_ZERO_LENGTH_NORMAL;
+ goto out_err;
+ }
+
+ /* The component end must be aligned by the stripe size */
+ if ((comp->llc_flags & LCME_FL_EXTENSION) &&
+ (prev->llc_stripe_size != LLAPI_LAYOUT_DEFAULT)) {
+ if (comp->llc_extent.e_end != LUSTRE_EOF &&
+ comp->llc_extent.e_end % prev->llc_stripe_size) {
+ args->lsa_rc = LSE_ALIGN_END;
+ goto out_err;
+ }
+ if ((comp->llc_stripe_size * SEL_UNIT_SIZE) %
+ prev->llc_stripe_size) {
+ args->lsa_rc = LSE_ALIGN_EXT;
+ goto out_err;
+ }
+ } else if (!(comp->llc_flags & LCME_FL_EXTENSION) &&
+ (comp->llc_stripe_size != LLAPI_LAYOUT_DEFAULT)) {
+ if (comp->llc_extent.e_end != LUSTRE_EOF &&
+ comp->llc_extent.e_end % comp->llc_stripe_size) {
+ args->lsa_rc = LSE_ALIGN_END;
+ goto out_err;
+ }
+ }
+ }
+
+ /* Components must have start == prev->end */
+ if (prev && comp->llc_extent.e_start != 0 &&
+ comp->llc_extent.e_start != prev->llc_extent.e_end) {
+ args->lsa_rc = LSE_NOT_ADJACENT_PREV;
+ goto out_err;
+ }
+
+ /* Components must have start <= end */
+ if (comp->llc_extent.e_start > comp->llc_extent.e_end) {
+ args->lsa_rc = LSE_START_GT_END;
+ goto out_err;
+ }
+
+ return LLAPI_LAYOUT_ITER_CONT;
+
+out_err:
+ errno = errno ? errno : EINVAL;
+ return LLAPI_LAYOUT_ITER_STOP;
+}
+
+/* Print explanation of layout error */
+void llapi_layout_sanity_perror(int error)
+{
+ if (error >= LSE_LAST || error < 0) {
+ fprintf(stdout, "Invalid layout, unrecognized error: %d\n",
+ error);
+ } else {
+ fprintf(stdout, "Invalid layout: %s\n",
+ llapi_layout_strerror[error]);
+ }
+}
+
+/* Walk a layout and enforce sanity checks that apply to > 1 component
+ *
+ * The core idea here is that of sanity checking individual tokens vs semantic
+ * checking.
+ * We cannot check everything at the individual component level ('token'),
+ * instead we must check whether or not the full layout has a valid meaning.
+ *
+ * An example of a component level check is "is stripe size valid?". That is
+ * handled when setting stripe size.
+ *
+ * An example of a layout level check is "are the extents of these components
+ * valid when adjacent to one another", or "can we set these flags on adjacent
+ * components"?
+ *
+ * \param[in] layout component layout list.
+ * \param[in] incomplete if layout is complete or not - some checks can
+ * only be done on complete layouts.
+ * \param[in] flr set when this is called from FLR mirror create
+ *
+ * \retval 0, success, positive: various errors, see
+ * llapi_layout_sanity_perror, -1, failure
+ */
+int llapi_layout_sanity(struct llapi_layout *layout, bool incomplete, bool flr)
+{
+ struct llapi_layout_sanity_args args;
+ struct llapi_layout_comp *curr;
+ int rc = 0;
+
+ if (!layout)
+ return 0;
+
+ curr = layout->llot_cur_comp;
+ if (!curr)
+ return 0;
+
+ /* Set up args */
+ args.lsa_rc = 0;
+ args.lsa_flr = flr;
+ args.lsa_incomplete = incomplete;
+
+ /* When we modify an existing layout, this tells us if it's FLR */
+ if (mirror_id_of(curr->llc_id) > 0)
+ args.lsa_flr = true;
+
+ errno = 0;
+ rc = llapi_layout_comp_iterate(layout,
+ llapi_layout_sanity_cb,
+ &args);
+ if (errno == ENOENT)
+ errno = 0;
+
+ if (rc != LLAPI_LAYOUT_ITER_CONT)
+ rc = args.lsa_rc;
+
+ layout->llot_cur_comp = curr;
+
+ return rc;
+}
+
+int llapi_layout_dom_size(struct llapi_layout *layout, uint64_t *size)
+{
+ uint64_t pattern, start;
+ int rc;
+
+ if (!layout || !llapi_layout_is_composite(layout)) {
+ *size = 0;
+ return 0;
+ }
+
+ rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_FIRST);
+ if (rc)
+ return -errno;
+
+ rc = llapi_layout_pattern_get(layout, &pattern);
+ if (rc)
+ return -errno;
+
+ if (pattern != LOV_PATTERN_MDT && pattern != LLAPI_LAYOUT_MDT) {
+ *size = 0;
+ return 0;
+ }
+
+ rc = llapi_layout_comp_extent_get(layout, &start, size);
+ if (rc)
+ return -errno;
+ if (start)
+ return -ERANGE;
+ return 0;
+}
+
+int lov_comp_md_size(struct lov_comp_md_v1 *lcm)
+{
+ if (lcm->lcm_magic == LOV_MAGIC_V1 || lcm->lcm_magic == LOV_MAGIC_V3) {
+ struct lov_user_md *lum = (void *)lcm;
+
+ return lov_user_md_size(lum->lmm_stripe_count, lum->lmm_magic);
+ }
+
+ if (lcm->lcm_magic == LOV_MAGIC_FOREIGN) {
+ struct lov_foreign_md *lfm = (void *)lcm;
+
+ return lfm->lfm_length;
+ }
+
+ if (lcm->lcm_magic != LOV_MAGIC_COMP_V1)
+ return -EOPNOTSUPP;
+
+ return lcm->lcm_size;
+}
+
+int llapi_get_lum_file_fd(int dir_fd, const char *fname, __u64 *valid,
+ lstatx_t *statx, struct lov_user_md *lum,
+ size_t lumsize)
+{
+ struct lov_user_mds_data *lmd;
+ char buf[65536 + offsetof(typeof(*lmd), lmd_lmm)];
+ int parent_fd = -1;
+ int rc;
+
+ if (lum && lumsize < sizeof(*lum))
+ return -EINVAL;
+
+ /* If a file name is provided, it is relative to the parent directory */
+ if (fname) {
+ parent_fd = dir_fd;
+ dir_fd = -1;
+ }
+
+ lmd = (struct lov_user_mds_data *)buf;
+ rc = get_lmd_info_fd(fname, parent_fd, dir_fd, buf, sizeof(buf),
+ GET_LMD_INFO);
+ if (rc)
+ return rc;
+
+ *valid = lmd->lmd_flags;
+ if (statx)
+ memcpy(statx, &lmd->lmd_stx, sizeof(*statx));
+
+ if (lum) {
+ if (lmd->lmd_lmmsize > lumsize)
+ return -EOVERFLOW;
+ memcpy(lum, &lmd->lmd_lmm, lmd->lmd_lmmsize);
+ }
+
+ return 0;
+}
+
+int llapi_get_lum_dir_fd(int dir_fd, __u64 *valid, lstatx_t *statx,
+ struct lov_user_md *lum, size_t lumsize)
+{
+ return llapi_get_lum_file_fd(dir_fd, NULL, valid, statx, lum, lumsize);
+}
+
+int llapi_get_lum_file(const char *path, __u64 *valid, lstatx_t *statx,
+ struct lov_user_md *lum, size_t lumsize)
+{
+ char parent[PATH_MAX];
+ const char *fname;
+ char *tmp;
+ int offset;
+ int dir_fd;
+ int rc;
+
+ tmp = strrchr(path, '/');
+ if (!tmp) {
+ strncpy(parent, ".", sizeof(parent) - 1);
+ offset = -1;
+ } else {
+ strncpy(parent, path, tmp - path);
+ offset = tmp - path - 1;
+ parent[tmp - path] = 0;
+ }
+
+ fname = path;
+ if (offset >= 0)
+ fname += offset + 2;
+
+ dir_fd = open(parent, O_RDONLY);
+ if (dir_fd < 0) {
+ rc = -errno;
+ llapi_error(LLAPI_MSG_ERROR, rc, "cannot open '%s'", path);
+ return rc;
+ }
+
+ rc = llapi_get_lum_file_fd(dir_fd, fname, valid, statx, lum, lumsize);
+ close(dir_fd);
+ return rc;
+}
+
+int llapi_get_lum_dir(const char *path, __u64 *valid, lstatx_t *statx,
+ struct lov_user_md *lum, size_t lumsize)
+{
+ int dir_fd;
+ int rc;
+
+ dir_fd = open(path, O_RDONLY);
+ if (dir_fd < 0) {
+ rc = -errno;
+ llapi_error(LLAPI_MSG_ERROR, rc, "cannot open '%s'", path);
+ return rc;
+ }
+
+ rc = llapi_get_lum_dir_fd(dir_fd, valid, statx, lum, lumsize);
+ close(dir_fd);
+ return rc;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff