* 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>
* \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;
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";
+}
+
/**
* llapi_layout_mirror_count_is_valid() - Check the validity of mirror count.
* @count: Mirror count value to be checked.
* comp->lcme_id value, which must be an unique component ID. The new
* attributes are passed in by @comp and @valid is used to specify which
* attributes in the component are going to be changed.
+ *
+ * \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,
- const struct llapi_layout *comp,
- uint32_t valid)
+int llapi_layout_file_comp_set(const char *path, uint32_t *ids, uint32_t *flags,
+ size_t count)
{
- errno = EOPNOTSUPP;
- return -1;
+ int rc = -1, fd = -1, i;
+ size_t lum_size;
+ struct llapi_layout *layout;
+ 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;
+ }
+ }
+
+ layout = __llapi_layout_alloc();
+ if (layout == NULL)
+ return -1;
+
+ layout->llot_is_composite = true;
+ for (i = 0; i < count; i++) {
+ comp = __llapi_comp_alloc(0);
+ if (comp == NULL)
+ 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)
+ goto out;
+
+ lum_size = ((struct lov_comp_md_v1 *)lum)->lcm_size;
+
+ fd = open(path, O_RDWR);
+ if (fd < 0)
+ goto out;
+
+ /* flush cached pages from clients */
+ rc = llapi_file_flush(fd);
+ if (rc) {
+ errno = -rc;
+ rc = -1;
+ goto out_close;
+ }
+
+ rc = fsetxattr(fd, XATTR_LUSTRE_LOV".set.flags", lum, lum_size, 0);
+ if (rc < 0)
+ goto out_close;
+
+ rc = 0;
+
+out_close:
+ if (fd >= 0) {
+ int tmp_errno = errno;
+ close(fd);
+ errno = tmp_errno;
+ }
+out:
+ if (lum)
+ free(lum);
+ llapi_layout_free(layout);
+ return rc;
}
/**
}
/**
+ * 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.
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;
+ }
+
+ 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) */
+static 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;
+}
+
+ssize_t llapi_mirror_resync_one(int fd, struct llapi_layout *layout,
+ uint32_t dst, uint64_t start, uint64_t end)
+{
+ uint64_t mirror_end = 0;
+ ssize_t result = 0;
+ size_t count;
+
+ if (end == OBD_OBJECT_EOF)
+ count = OBD_OBJECT_EOF;
+ else
+ count = end - start;
+
+ while (count > 0) {
+ uint32_t src;
+ size_t to_copy;
+ ssize_t copied;
+
+ src = llapi_mirror_find(layout, start, end, &mirror_end);
+ if (src == 0)
+ return -ENOENT;
+
+ if (mirror_end == OBD_OBJECT_EOF)
+ to_copy = count;
+ else
+ to_copy = MIN(count, mirror_end - start);
+
+ copied = llapi_mirror_copy(fd, src, dst, start, to_copy);
+ if (copied < 0)
+ return copied;
+
+ result += copied;
+ if (copied < to_copy) /* end of file */
+ break;
+
+ if (count != OBD_OBJECT_EOF)
+ count -= copied;
+ start += copied;
+ }
+
+ return result;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff