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Subject[PATCH 13/22] mpool: add utility routines for mpool lifecycle management
Date
From: Nabeel M Mohamed <nmeeramohide@micron.com>

This adds utility routines to:

- Create and initialize a media class with an mpool volume
- Initialize and validate superblocks on all media class
volumes
- Open and initialize all media class volumes
- Allocate metadata container 0 (MDC0) and update the
superblock on capacity media class volume with metadata for
accessing MDC0
- Create and initialize root MDC
- Initialize mpool descriptor and track the mapping between an
mpool UUID and its descriptor in a rbtree

When an mpool is created, a pair of mlogs are instantiated with
well-known OIDs comprising the root MDC of the mpool. The root
MDC provides a location for mpool clients to store whatever
metadata they need for start-up.

Co-developed-by: Greg Becker <gbecker@micron.com>
Signed-off-by: Greg Becker <gbecker@micron.com>
Co-developed-by: Pierre Labat <plabat@micron.com>
Signed-off-by: Pierre Labat <plabat@micron.com>
Co-developed-by: John Groves <jgroves@micron.com>
Signed-off-by: John Groves <jgroves@micron.com>
Signed-off-by: Nabeel M Mohamed <nmeeramohide@micron.com>
---
drivers/mpool/mpcore.c | 987 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 987 insertions(+)
create mode 100644 drivers/mpool/mpcore.c

diff --git a/drivers/mpool/mpcore.c b/drivers/mpool/mpcore.c
new file mode 100644
index 000000000000..246baedcdcec
--- /dev/null
+++ b/drivers/mpool/mpcore.c
@@ -0,0 +1,987 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2015-2020 Micron Technology, Inc. All rights reserved.
+ */
+
+/*
+ * Media pool (mpool) manager module.
+ *
+ * Defines functions to create and maintain mpools comprising multiple drives
+ * in multiple media classes used for storing mblocks and mlogs.
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/sort.h>
+#include <linux/slab.h>
+#include <linux/kref.h>
+#include <linux/rbtree.h>
+
+#include "mpool_ioctl.h"
+
+#include "mpool_printk.h"
+#include "assert.h"
+#include "uuid.h"
+
+#include "mp.h"
+#include "omf.h"
+#include "omf_if.h"
+#include "pd.h"
+#include "smap.h"
+#include "mclass.h"
+#include "pmd_obj.h"
+#include "mpcore.h"
+#include "sb.h"
+#include "upgrade.h"
+
+struct omf_devparm_descriptor;
+struct mpool_descriptor;
+
+/* Rbtree mapping mpool UUID to mpool descriptor node: uuid_to_mpdesc_rb */
+struct rb_root mpool_pools = { NULL };
+
+int uuid_to_mpdesc_insert(struct rb_root *root, struct mpool_descriptor *data)
+{
+ struct rb_node **new = &(root->rb_node), *parent = NULL;
+
+ /* Figure out where to put new node */
+ while (*new) {
+ struct mpool_descriptor *this = rb_entry(*new, struct mpool_descriptor, pds_node);
+
+ int result = mpool_uuid_compare(&data->pds_poolid, &this->pds_poolid);
+
+ parent = *new;
+ if (result < 0)
+ new = &((*new)->rb_left);
+ else if (result > 0)
+ new = &((*new)->rb_right);
+ else
+ return false;
+ }
+
+ /* Add new node and rebalance tree. */
+ rb_link_node(&data->pds_node, parent, new);
+ rb_insert_color(&data->pds_node, root);
+
+ return true;
+}
+
+static struct mpool_descriptor *
+uuid_to_mpdesc_search(struct rb_root *root, struct mpool_uuid *key_uuid)
+{
+ struct rb_node *node = root->rb_node;
+
+ while (node) {
+ struct mpool_descriptor *data = rb_entry(node, struct mpool_descriptor, pds_node);
+
+ int result = mpool_uuid_compare(key_uuid, &data->pds_poolid);
+
+ if (result < 0)
+ node = node->rb_left;
+ else if (result > 0)
+ node = node->rb_right;
+ else
+ return data;
+ }
+ return NULL;
+}
+
+int mpool_dev_sbwrite(struct mpool_descriptor *mp, struct mpool_dev_info *pd,
+ struct omf_sb_descriptor *sbmdc0)
+{
+ struct omf_sb_descriptor *sb = NULL;
+ struct mc_parms mc_parms;
+ int rc;
+
+ if (mpool_pd_status_get(pd) != PD_STAT_ONLINE) {
+ rc = -EIO;
+ mp_pr_err("%s:%s unavailable or offline, status %d",
+ rc, mp->pds_name, pd->pdi_name, mpool_pd_status_get(pd));
+ return rc;
+ }
+
+ sb = kzalloc(sizeof(struct omf_sb_descriptor), GFP_KERNEL);
+ if (!sb) {
+ rc = -ENOMEM;
+ mp_pr_err("mpool %s, writing superblock on drive %s, alloc of superblock descriptor failed %lu",
+ rc, mp->pds_name, pd->pdi_name, sizeof(struct omf_sb_descriptor));
+ return rc;
+ }
+
+ /*
+ * Set superblock values common to all new drives in pool
+ * (new or extant)
+ */
+ sb->osb_magic = OMF_SB_MAGIC;
+ strlcpy((char *) sb->osb_name, mp->pds_name, sizeof(sb->osb_name));
+ sb->osb_vers = OMF_SB_DESC_VER_LAST;
+ mpool_uuid_copy(&sb->osb_poolid, &mp->pds_poolid);
+ sb->osb_gen = 1;
+
+ /* Set superblock values specific to this drive */
+ mpool_uuid_copy(&sb->osb_parm.odp_devid, &pd->pdi_devid);
+ sb->osb_parm.odp_devsz = pd->pdi_parm.dpr_devsz;
+ sb->osb_parm.odp_zonetot = pd->pdi_parm.dpr_zonetot;
+ mc_pd_prop2mc_parms(&pd->pdi_parm.dpr_prop, &mc_parms);
+ mc_parms2omf_devparm(&mc_parms, &sb->osb_parm);
+
+ if (sbmdc0)
+ sbutil_mdc0_copy(sb, sbmdc0);
+ else
+ sbutil_mdc0_clear(sb);
+
+ rc = sb_write_new(&pd->pdi_parm, sb);
+ if (rc) {
+ mp_pr_err("mpool %s, writing superblock on drive %s, write failed",
+ rc, mp->pds_name, pd->pdi_name);
+ }
+
+ kfree(sb);
+ return rc;
+}
+
+/**
+ * mpool_mdc0_alloc() - Allocate space for the two MDC0 mlogs
+ * @mp:
+ * @sb:
+ *
+ * In the context of a mpool create, allocate space for the two MDC0 mlogs
+ * and update the sb structure with the position of MDC0.
+ *
+ * Note: this function assumes that the media classes have already been
+ * created.
+ */
+static int mpool_mdc0_alloc(struct mpool_descriptor *mp, struct omf_sb_descriptor *sb)
+{
+ struct mpool_dev_info *pd;
+ struct media_class *mc;
+ struct mpool_uuid uuid;
+ u64 zcnt, zonelen;
+ u32 cnt;
+ int rc;
+
+ sbutil_mdc0_clear(sb);
+
+ ASSERT(mp->pds_mdparm.md_mclass < MP_MED_NUMBER);
+
+ mc = &mp->pds_mc[mp->pds_mdparm.md_mclass];
+ if (mc->mc_pdmc < 0) {
+ rc = -ENOSPC;
+ mp_pr_err("%s: sb update memory image MDC0 information, not enough drives",
+ rc, mp->pds_name);
+ return rc;
+ }
+
+ pd = &mp->pds_pdv[mc->mc_pdmc];
+
+ zonelen = (u64)pd->pdi_parm.dpr_zonepg << PAGE_SHIFT;
+ zcnt = 1 + ((mp->pds_params.mp_mdc0cap - 1) / zonelen);
+
+ cnt = sb_zones_for_sbs(&(pd->pdi_prop));
+ if (cnt < 1) {
+ rc = -EINVAL;
+ mp_pr_err("%s: sb MDC0, getting sb range failed for drive %s %u",
+ rc, mp->pds_name, pd->pdi_name, cnt);
+ return rc;
+ }
+
+ if ((pd->pdi_zonetot - cnt) < zcnt * 2) {
+ rc = -ENOSPC;
+ mp_pr_err("%s: sb MDC0, no room for MDC0 on drive %s %lu %u %lu",
+ rc, mp->pds_name, pd->pdi_name,
+ (ulong)pd->pdi_zonetot, cnt, (ulong)zcnt);
+ return rc;
+ }
+
+ /*
+ * mdc0 log1/2 alloced on first 2 * zcnt zone's
+ */
+ rc = pd_zone_erase(&pd->pdi_parm, cnt, zcnt * 2, true);
+ if (rc) {
+ mp_pr_err("%s: sb MDC0, erase failed on %s %u %lu",
+ rc, mp->pds_name, pd->pdi_name, cnt, (ulong)zcnt);
+ return rc;
+ }
+
+ /*
+ * Fill in common mdc0 log1/2 and drive info.
+ */
+ sb->osb_mdc01gen = 1;
+ sb->osb_mdc01desc.ol_zcnt = zcnt;
+ mpool_generate_uuid(&uuid);
+ mpool_uuid_copy(&sb->osb_mdc01uuid, &uuid);
+
+ sb->osb_mdc02gen = 2;
+ sb->osb_mdc02desc.ol_zcnt = zcnt;
+ mpool_generate_uuid(&uuid);
+ mpool_uuid_copy(&sb->osb_mdc02uuid, &uuid);
+
+ mpool_uuid_copy(&sb->osb_mdc01devid, &pd->pdi_devid);
+ sb->osb_mdc01desc.ol_zaddr = cnt;
+
+ mpool_uuid_copy(&sb->osb_mdc02devid, &pd->pdi_devid);
+ sb->osb_mdc02desc.ol_zaddr = cnt + zcnt;
+
+ mpool_uuid_copy(&sb->osb_mdc0dev.odp_devid, &pd->pdi_devid);
+ sb->osb_mdc0dev.odp_devsz = pd->pdi_parm.dpr_devsz;
+ sb->osb_mdc0dev.odp_zonetot = pd->pdi_parm.dpr_zonetot;
+ mc_parms2omf_devparm(&mc->mc_parms, &sb->osb_mdc0dev);
+
+ return 0;
+}
+
+int mpool_dev_sbwrite_newpool(struct mpool_descriptor *mp, struct omf_sb_descriptor *sbmdc0)
+{
+ struct mpool_dev_info *pd = NULL;
+ u64 pdh = 0;
+ int rc;
+
+ /* Alloc mdc0 and generate mdc0 info for superblocks */
+ rc = mpool_mdc0_alloc(mp, sbmdc0);
+ if (rc) {
+ mp_pr_err("%s: MDC0 allocation failed", rc, mp->pds_name);
+ return rc;
+ }
+
+ for (pdh = 0; pdh < mp->pds_pdvcnt; pdh++) {
+ pd = &mp->pds_pdv[pdh];
+
+ if (pd->pdi_mclass == mp->pds_mdparm.md_mclass)
+ rc = mpool_dev_sbwrite(mp, pd, sbmdc0);
+ else
+ rc = mpool_dev_sbwrite(mp, pd, NULL);
+ if (rc) {
+ mp_pr_err("%s: sb write %s failed, %d %d", rc, mp->pds_name,
+ pd->pdi_name, pd->pdi_mclass, mp->pds_mdparm.md_mclass);
+ break;
+ }
+ }
+
+ return rc;
+}
+
+int mpool_mdc0_sb2obj(struct mpool_descriptor *mp, struct omf_sb_descriptor *sb,
+ struct pmd_layout **l1, struct pmd_layout **l2)
+{
+ int rc, i;
+
+ /* MDC0 mlog1 layout */
+ *l1 = pmd_layout_alloc(&sb->osb_mdc01uuid, MDC0_OBJID_LOG1, sb->osb_mdc01gen, 0,
+ sb->osb_mdc01desc.ol_zcnt);
+ if (!*l1) {
+ *l1 = *l2 = NULL;
+
+ rc = -ENOMEM;
+ mp_pr_err("mpool %s, MDC0 mlog1 allocation failed", rc, mp->pds_name);
+ return rc;
+ }
+
+ (*l1)->eld_state = PMD_LYT_COMMITTED;
+
+ for (i = 0; i < mp->pds_pdvcnt; i++) {
+ if (mpool_uuid_compare(&mp->pds_pdv[i].pdi_devid, &sb->osb_mdc01devid) == 0) {
+ (*l1)->eld_ld.ol_pdh = i;
+ (*l1)->eld_ld.ol_zaddr = sb->osb_mdc01desc.ol_zaddr;
+ break;
+ }
+ }
+
+ if (i >= mp->pds_pdvcnt) {
+ char uuid_str[40];
+
+ /* Should never happen */
+ pmd_obj_put(*l1);
+ *l1 = *l2 = NULL;
+
+ mpool_unparse_uuid(&sb->osb_mdc01devid, uuid_str);
+ rc = -ENOENT;
+ mp_pr_err("mpool %s, allocating MDC0 mlog1, can't find handle for pd uuid %s,",
+ rc, mp->pds_name, uuid_str);
+
+ return rc;
+ }
+
+ /* MDC0 mlog2 layout */
+ *l2 = pmd_layout_alloc(&sb->osb_mdc02uuid, MDC0_OBJID_LOG2, sb->osb_mdc02gen, 0,
+ sb->osb_mdc02desc.ol_zcnt);
+ if (!*l2) {
+ pmd_obj_put(*l1);
+
+ *l1 = *l2 = NULL;
+
+ rc = -ENOMEM;
+ mp_pr_err("mpool %s, MDC0 mlog2 allocation failed", rc, mp->pds_name);
+ return rc;
+ }
+
+ (*l2)->eld_state = PMD_LYT_COMMITTED;
+
+ for (i = 0; i < mp->pds_pdvcnt; i++) {
+ if (mpool_uuid_compare(&mp->pds_pdv[i].pdi_devid, &sb->osb_mdc02devid) == 0) {
+ (*l2)->eld_ld.ol_pdh = i;
+ (*l2)->eld_ld.ol_zaddr = sb->osb_mdc02desc.ol_zaddr;
+ break;
+ }
+ }
+
+ if (i >= mp->pds_pdvcnt) {
+ char uuid_str[40];
+
+ /* Should never happen */
+ pmd_obj_put(*l1);
+ pmd_obj_put(*l2);
+ *l1 = *l2 = NULL;
+
+ mpool_unparse_uuid(&sb->osb_mdc02devid, uuid_str);
+ rc = -ENOENT;
+ mp_pr_err("mpool %s, allocating MDC0 mlog2, can't find handle for pd uuid %s",
+ rc, mp->pds_name, uuid_str);
+
+ return rc;
+ }
+
+ return 0;
+}
+
+/**
+ * mpool_dev_check_new() - check if a drive is ready to be added in an mpool.
+ * @mp:
+ * @pd:
+ */
+int mpool_dev_check_new(struct mpool_descriptor *mp, struct mpool_dev_info *pd)
+{
+ int rval, rc;
+
+ if (mpool_pd_status_get(pd) != PD_STAT_ONLINE) {
+ rc = -EIO;
+ mp_pr_err("%s:%s unavailable or offline, status %d",
+ rc, mp->pds_name, pd->pdi_name, mpool_pd_status_get(pd));
+ return rc;
+ }
+
+ /* Confirm drive does not contain mpool magic value */
+ rval = sb_magic_check(&pd->pdi_parm);
+ if (rval) {
+ if (rval < 0) {
+ rc = rval;
+ mp_pr_err("%s:%s read sb magic failed", rc, mp->pds_name, pd->pdi_name);
+ return rc;
+ }
+
+ rc = -EBUSY;
+ mp_pr_err("%s:%s sb magic already exists", rc, mp->pds_name, pd->pdi_name);
+ return rc;
+ }
+
+ return 0;
+}
+
+int mpool_desc_pdmc_add(struct mpool_descriptor *mp, u16 pdh,
+ struct omf_devparm_descriptor *omf_devparm, bool check_only)
+{
+ struct mpool_dev_info *pd = NULL;
+ struct media_class *mc;
+ struct mc_parms mc_parms;
+ int rc;
+
+ pd = &mp->pds_pdv[pdh];
+ if (omf_devparm == NULL)
+ mc_pd_prop2mc_parms(&pd->pdi_parm.dpr_prop, &mc_parms);
+ else
+ mc_omf_devparm2mc_parms(omf_devparm, &mc_parms);
+
+ if (!mclass_isvalid(mc_parms.mcp_classp)) {
+ rc = -EINVAL;
+ mp_pr_err("%s: media class %u of %s is undefined", rc, mp->pds_name,
+ mc_parms.mcp_classp, pd->pdi_name);
+ return rc;
+ }
+
+ /*
+ * Devices that do not support updatable sectors can't be included
+ * in an mpool. Do not check if in the context of an unavailable PD
+ * during activate, because it is impossible to determine the PD
+ * properties.
+ */
+ if ((omf_devparm == NULL) && !(pd->pdi_cmdopt & PD_CMD_SECTOR_UPDATABLE)) {
+ rc = -EINVAL;
+ mp_pr_err("%s: device %s sectors not updatable", rc, mp->pds_name, pd->pdi_name);
+ return rc;
+ }
+
+ mc = &mp->pds_mc[mc_parms.mcp_classp];
+ if (mc->mc_pdmc < 0) {
+ struct mc_smap_parms mcsp;
+
+ /*
+ * No media class corresponding to the PD class yet, create one.
+ */
+ rc = mc_smap_parms_get(&mp->pds_mc[mc_parms.mcp_classp], &mp->pds_params, &mcsp);
+ if (rc)
+ return rc;
+
+ if (!check_only)
+ mc_init_class(mc, &mc_parms, &mcsp);
+ } else {
+ rc = -EINVAL;
+ mp_pr_err("%s: add %s, only 1 device allowed per media class",
+ rc, mp->pds_name, pd->pdi_name);
+ return rc;
+ }
+
+ if (check_only)
+ return 0;
+
+ mc->mc_pdmc = pdh;
+
+ return 0;
+}
+
+/**
+ * mpool_desc_init_newpool() - Create the media classes and add all the mpool PDs
+ * @mp:
+ * @flags: enum mp_mgmt_flags
+ *
+ * Called on mpool create.
+ * Create the media classes and add all the mpool PDs in their media class.
+ * Update the metadata media class in mp->pds_mdparm
+ *
+ * Note: the PD properties (pd->pdi_parm.dpr_prop) must be updated
+ * and correct when entering this function.
+ */
+int mpool_desc_init_newpool(struct mpool_descriptor *mp, u32 flags)
+{
+ u64 pdh = 0;
+ int rc;
+
+ if (!(flags & (1 << MP_FLAGS_FORCE))) {
+ rc = mpool_dev_check_new(mp, &mp->pds_pdv[pdh]);
+ if (rc)
+ return rc;
+ }
+
+ /*
+ * Add drive in its media class. That may create the class
+ * if first drive of the class.
+ */
+ rc = mpool_desc_pdmc_add(mp, pdh, NULL, false);
+ if (rc) {
+ struct mpool_dev_info *pd __maybe_unused;
+
+ pd = &mp->pds_pdv[pdh];
+
+ mp_pr_err("mpool %s, mpool desc init, adding drive %s in a media class failed",
+ rc, mp->pds_name, pd->pdi_name);
+ return rc;
+ }
+
+ mp->pds_mdparm.md_mclass = mp->pds_pdv[pdh].pdi_mclass;
+
+ return 0;
+}
+
+int mpool_dev_init_all(struct mpool_dev_info *pdv, u64 dcnt, char **dpaths,
+ struct pd_prop *pd_prop)
+{
+ char *pdname;
+ int idx, rc;
+
+ if (dcnt == 0)
+ return -EINVAL;
+
+ for (rc = 0, idx = 0; idx < dcnt; idx++, pd_prop++) {
+ rc = pd_dev_open(dpaths[idx], &pdv[idx].pdi_parm, pd_prop);
+ if (rc) {
+ mp_pr_err("opening device %s failed", rc, dpaths[idx]);
+ break;
+ }
+
+ pdname = strrchr(dpaths[idx], '/');
+ pdname = pdname ? pdname + 1 : dpaths[idx];
+ strlcpy(pdv[idx].pdi_name, pdname, sizeof(pdv[idx].pdi_name));
+
+ mpool_pd_status_set(&pdv[idx], PD_STAT_ONLINE);
+ }
+
+ while (rc && idx-- > 0)
+ pd_dev_close(&pdv[idx].pdi_parm);
+
+ return rc;
+}
+
+void mpool_mdc_cap_init(struct mpool_descriptor *mp, struct mpool_dev_info *pd)
+{
+ u64 zonesz, defmbsz;
+
+ zonesz = (pd->pdi_zonepg << PAGE_SHIFT) >> 20;
+ defmbsz = MPOOL_MBSIZE_MB_DEFAULT;
+
+ if (mp->pds_params.mp_mdc0cap == 0) {
+ mp->pds_params.mp_mdc0cap = max_t(u64, defmbsz, zonesz);
+ mp->pds_params.mp_mdc0cap <<= 20;
+ }
+
+ if (mp->pds_params.mp_mdcncap == 0) {
+ mp->pds_params.mp_mdcncap = max_t(u64, zonesz, (256 / zonesz));
+ mp->pds_params.mp_mdcncap <<= 20;
+ }
+}
+
+/**
+ * mpool_desc_init_sb() - Read the super blocks of the PDs.
+ * @mp:
+ * @sbmdc0: output. MDC0 information stored in the super blocks.
+ * @flags:
+ *
+ * Adjust the discovered PD properties stored in pd->pdi_parm.dpr_prop with
+ * PD parameters from the super block. Some of discovered PD properties are
+ * default (like zone size) and need to be adjusted to what the PD actually
+ * use.
+ */
+int mpool_desc_init_sb(struct mpool_descriptor *mp, struct omf_sb_descriptor *sbmdc0,
+ u32 flags, bool *mc_resize)
+{
+ struct omf_sb_descriptor *sb = NULL;
+ struct mpool_dev_info *pd = NULL;
+ u16 omf_ver = OMF_SB_DESC_UNDEF;
+ bool mdc0found = false;
+ bool force = ((flags & (1 << MP_FLAGS_FORCE)) != 0);
+ u8 pdh = 0;
+ int rc;
+
+ sb = kzalloc(sizeof(*sb), GFP_KERNEL);
+ if (!sb) {
+ rc = -ENOMEM;
+ mp_pr_err("sb desc alloc failed %lu", rc, (ulong)sizeof(*sb));
+ return rc;
+ }
+
+ for (pdh = 0; pdh < mp->pds_pdvcnt; pdh++) {
+ struct omf_devparm_descriptor *dparm;
+ bool resize = false;
+ int i;
+
+ pd = &mp->pds_pdv[pdh];
+ if (mpool_pd_status_get(pd) != PD_STAT_ONLINE) {
+ rc = -EIO;
+ mp_pr_err("pd %s unavailable or offline, status %d",
+ rc, pd->pdi_name, mpool_pd_status_get(pd));
+ kfree(sb);
+ return rc;
+ }
+
+ /*
+ * Read superblock; init and validate pool drive info
+ * from device parameters stored in the super block.
+ */
+ rc = sb_read(&pd->pdi_parm, sb, &omf_ver, force);
+ if (rc) {
+ mp_pr_err("sb read from %s failed", rc, pd->pdi_name);
+ kfree(sb);
+ return rc;
+ }
+
+ if (!pdh) {
+ size_t n __maybe_unused;
+
+ /*
+ * First drive; confirm pool not open; set pool-wide
+ * properties
+ */
+ if (uuid_to_mpdesc_search(&mpool_pools, &sb->osb_poolid)) {
+ char *uuid_str;
+
+ uuid_str = kmalloc(MPOOL_UUID_STRING_LEN + 1, GFP_KERNEL);
+ if (uuid_str)
+ mpool_unparse_uuid(&sb->osb_poolid, uuid_str);
+
+ rc = -EBUSY;
+ mp_pr_err("%s: mpool already activated, id %s, pd name %s",
+ rc, sb->osb_name, uuid_str, pd->pdi_name);
+ kfree(sb);
+ kfree(uuid_str);
+ return rc;
+ }
+ mpool_uuid_copy(&mp->pds_poolid, &sb->osb_poolid);
+
+ n = strlcpy(mp->pds_name, (char *)sb->osb_name, sizeof(mp->pds_name));
+ ASSERT(n < sizeof(mp->pds_name));
+ } else {
+ /* Second or later drive; validate pool-wide properties */
+ if (mpool_uuid_compare(&sb->osb_poolid, &mp->pds_poolid) != 0) {
+ char *uuid_str1, *uuid_str2 = NULL;
+
+ uuid_str1 = kmalloc(2 * (MPOOL_UUID_STRING_LEN + 1), GFP_KERNEL);
+ if (uuid_str1) {
+ uuid_str2 = uuid_str1 + MPOOL_UUID_STRING_LEN + 1;
+ mpool_unparse_uuid(&sb->osb_poolid, uuid_str1);
+ mpool_unparse_uuid(&mp->pds_poolid, uuid_str2);
+ }
+
+ rc = -EINVAL;
+ mp_pr_err("%s: pd %s, mpool id %s different from prior id %s",
+ rc, mp->pds_name, pd->pdi_name, uuid_str1, uuid_str2);
+ kfree(sb);
+ kfree(uuid_str1);
+ return rc;
+ }
+ }
+
+ dparm = &sb->osb_parm;
+ if (!force && pd->pdi_devsz > dparm->odp_devsz) {
+ mp_pr_info("%s: pd %s, discovered size %lu > on-media size %lu",
+ mp->pds_name, pd->pdi_name,
+ (ulong)pd->pdi_devsz, (ulong)dparm->odp_devsz);
+
+ if ((flags & (1 << MP_FLAGS_RESIZE)) == 0) {
+ pd->pdi_devsz = dparm->odp_devsz;
+ } else {
+ dparm->odp_devsz = pd->pdi_devsz;
+ dparm->odp_zonetot = pd->pdi_devsz / (pd->pdi_zonepg << PAGE_SHIFT);
+
+ pd->pdi_zonetot = dparm->odp_zonetot;
+ resize = true;
+ }
+ }
+
+ /* Validate mdc0 info in superblock if present */
+ if (!sbutil_mdc0_isclear(sb)) {
+ if (!force && !sbutil_mdc0_isvalid(sb)) {
+ rc = -EINVAL;
+ mp_pr_err("%s: pd %s, invalid sb MDC0",
+ rc, mp->pds_name, pd->pdi_name);
+ kfree(sb);
+ return rc;
+ }
+
+ dparm = &sb->osb_mdc0dev;
+ if (resize) {
+ ASSERT(pd->pdi_devsz > dparm->odp_devsz);
+
+ dparm->odp_devsz = pd->pdi_devsz;
+ dparm->odp_zonetot = pd->pdi_devsz / (pd->pdi_zonepg << PAGE_SHIFT);
+ }
+
+ sbutil_mdc0_copy(sbmdc0, sb);
+ mdc0found = true;
+ }
+
+ /* Set drive info confirming devid is unique and zone parms match */
+ for (i = 0; i < pdh; i++) {
+ if (mpool_uuid_compare(&mp->pds_pdv[i].pdi_devid,
+ &sb->osb_parm.odp_devid) == 0) {
+ char *uuid_str;
+
+ uuid_str = kmalloc(MPOOL_UUID_STRING_LEN + 1, GFP_KERNEL);
+ if (uuid_str)
+ mpool_unparse_uuid(&sb->osb_parm.odp_devid, uuid_str);
+ rc = -EINVAL;
+ mp_pr_err("%s: pd %s, duplicate devices, uuid %s",
+ rc, mp->pds_name, pd->pdi_name, uuid_str);
+ kfree(uuid_str);
+ kfree(sb);
+ return rc;
+ }
+ }
+
+ if (omf_ver > OMF_SB_DESC_VER_LAST) {
+ rc = -EOPNOTSUPP;
+ mp_pr_err("%s: unsupported sb version %d", rc, mp->pds_name, omf_ver);
+ kfree(sb);
+ return rc;
+ } else if (!force && (omf_ver < OMF_SB_DESC_VER_LAST || resize)) {
+ if ((flags & (1 << MP_FLAGS_PERMIT_META_CONV)) == 0) {
+ struct omf_mdcver *mdcver;
+ char *buf1, *buf2 = NULL;
+
+ /*
+ * We have to get the permission from users
+ * to update mpool meta data
+ */
+ mdcver = omf_sbver_to_mdcver(omf_ver);
+ ASSERT(mdcver != NULL);
+
+ buf1 = kmalloc(2 * MAX_MDCVERSTR, GFP_KERNEL);
+ if (buf1) {
+ buf2 = buf1 + MAX_MDCVERSTR;
+ omfu_mdcver_to_str(mdcver, buf1, sizeof(buf1));
+ omfu_mdcver_to_str(omfu_mdcver_cur(), buf2, sizeof(buf2));
+ }
+
+ rc = -EPERM;
+ mp_pr_err("%s: reqd sb upgrade from version %s (%s) to %s (%s)",
+ rc, mp->pds_name,
+ buf1, omfu_mdcver_comment(mdcver) ?: "",
+ buf2, omfu_mdcver_comment(omfu_mdcver_cur()));
+ kfree(buf1);
+ kfree(sb);
+ return rc;
+ }
+
+ /* We need to overwrite the old version superblock on the device */
+ rc = sb_write_update(&pd->pdi_parm, sb);
+ if (rc) {
+ mp_pr_err("%s: pd %s, failed to convert or overwrite mpool sb",
+ rc, mp->pds_name, pd->pdi_name);
+ kfree(sb);
+ return rc;
+ }
+
+ if (!resize)
+ mp_pr_info("%s: pd %s, Convert mpool sb, oldv %d newv %d",
+ mp->pds_name, pd->pdi_name, omf_ver, sb->osb_vers);
+ }
+
+ mpool_uuid_copy(&pd->pdi_devid, &sb->osb_parm.odp_devid);
+
+ /* Add drive in its media class. Create the media class if not yet created. */
+ rc = mpool_desc_pdmc_add(mp, pdh, NULL, false);
+ if (rc) {
+ mp_pr_err("%s: pd %s, adding drive in a media class failed",
+ rc, mp->pds_name, pd->pdi_name);
+
+ kfree(sb);
+ return rc;
+ }
+
+ /*
+ * Record the media class used by the MDC0 metadata.
+ */
+ if (mdc0found)
+ mp->pds_mdparm.md_mclass = pd->pdi_mclass;
+
+ if (resize && mc_resize)
+ mc_resize[pd->pdi_mclass] = resize;
+ }
+
+ if (!mdc0found) {
+ rc = -EINVAL;
+ mp_pr_err("%s: MDC0 not found", rc, mp->pds_name);
+ kfree(sb);
+ return rc;
+ }
+
+ kfree(sb);
+
+ return 0;
+}
+
+static int comp_func(const void *c1, const void *c2)
+{
+ return strcmp(*(char **)c1, *(char **)c2);
+}
+
+int check_for_dups(char **listv, int cnt, int *dup, int *offset)
+{
+ const char **sortedv;
+ const char *prev;
+ int rc, i;
+
+ *dup = 0;
+ *offset = -1;
+
+ if (0 == cnt || 1 == cnt)
+ return 0;
+
+ sortedv = kcalloc(cnt + 1, sizeof(char *), GFP_KERNEL);
+ if (!sortedv) {
+ rc = -ENOMEM;
+ mp_pr_err("kcalloc failed for %d paths, first path %s", rc, cnt, *listv);
+ return rc;
+ }
+
+ /* Make a shallow copy */
+ for (i = 0; i < cnt; i++)
+ sortedv[i] = listv[i];
+
+ sortedv[i] = NULL;
+
+ sort(sortedv, cnt, sizeof(char *), comp_func, NULL);
+
+ prev = sortedv[0];
+ for (i = 1; i < cnt; i++) {
+ if (strcmp(sortedv[i], prev) == 0) {
+ mp_pr_info("path %s is duplicated", prev);
+ *dup = 1;
+ break;
+ }
+
+ prev = sortedv[i];
+ }
+
+ /* Find offset, prev points to first dup */
+ if (*dup) {
+ for (i = 0; i < cnt; i++) {
+ if (prev == listv[i]) {
+ *offset = i;
+ break;
+ }
+ }
+ }
+
+ kfree(sortedv);
+ return 0;
+}
+
+void fill_in_devprops(struct mpool_descriptor *mp, u64 pdh, struct mpool_devprops *dprop)
+{
+ struct mpool_dev_info *pd;
+ struct media_class *mc;
+ int rc;
+
+ pd = &mp->pds_pdv[pdh];
+ memcpy(dprop->pdp_devid.b, pd->pdi_devid.uuid, MPOOL_UUID_SIZE);
+
+ mc = &mp->pds_mc[pd->pdi_mclass];
+ dprop->pdp_mclassp = mc->mc_parms.mcp_classp;
+ dprop->pdp_status = mpool_pd_status_get(pd);
+
+ rc = smap_drive_usage(mp, pdh, dprop);
+ if (rc) {
+ mp_pr_err("mpool %s, can't get drive usage, media class %d",
+ rc, mp->pds_name, dprop->pdp_mclassp);
+ }
+}
+
+int mpool_desc_unavail_add(struct mpool_descriptor *mp, struct omf_devparm_descriptor *omf_devparm)
+{
+ struct mpool_dev_info *pd = NULL;
+ char uuid_str[40];
+ int rc;
+
+ mpool_unparse_uuid(&omf_devparm->odp_devid, uuid_str);
+
+ mp_pr_warn("Activating mpool %s, adding unavailable drive %s", mp->pds_name, uuid_str);
+
+ if (mp->pds_pdvcnt >= MPOOL_DRIVES_MAX) {
+ rc = -EINVAL;
+ mp_pr_err("Activating mpool %s, adding an unavailable drive, too many drives",
+ rc, mp->pds_name);
+ return rc;
+ }
+
+ pd = &mp->pds_pdv[mp->pds_pdvcnt];
+
+ mpool_uuid_copy(&pd->pdi_devid, &omf_devparm->odp_devid);
+
+ /* Update the PD properties from the metadata record. */
+ mpool_pd_status_set(pd, PD_STAT_UNAVAIL);
+ pd_dev_set_unavail(&pd->pdi_parm, omf_devparm);
+
+ /* Add the PD in its media class. */
+ rc = mpool_desc_pdmc_add(mp, mp->pds_pdvcnt, omf_devparm, false);
+ if (rc)
+ return rc;
+
+ mp->pds_pdvcnt = mp->pds_pdvcnt + 1;
+
+ return 0;
+}
+
+int mpool_create_rmlogs(struct mpool_descriptor *mp, u64 mlog_cap)
+{
+ struct mlog_descriptor *ml_desc;
+ struct mlog_capacity mlcap = {
+ .lcp_captgt = mlog_cap,
+ };
+ struct mlog_props mlprops;
+ u64 root_mlog_id[2];
+ int rc, i;
+
+ mlog_lookup_rootids(&root_mlog_id[0], &root_mlog_id[1]);
+
+ for (i = 0; i < 2; ++i) {
+ rc = mlog_find_get(mp, root_mlog_id[i], 1, NULL, &ml_desc);
+ if (!rc) {
+ mlog_put(ml_desc);
+ continue;
+ }
+
+ if (rc != -ENOENT) {
+ mp_pr_err("mpool %s, root mlog find 0x%lx failed",
+ rc, mp->pds_name, (ulong)root_mlog_id[i]);
+ return rc;
+ }
+
+ rc = mlog_realloc(mp, root_mlog_id[i], &mlcap,
+ MP_MED_CAPACITY, &mlprops, &ml_desc);
+ if (rc) {
+ mp_pr_err("mpool %s, root mlog realloc 0x%lx failed",
+ rc, mp->pds_name, (ulong)root_mlog_id[i]);
+ return rc;
+ }
+
+ if (mlprops.lpr_objid != root_mlog_id[i]) {
+ mlog_put(ml_desc);
+ rc = -ENOENT;
+ mp_pr_err("mpool %s, root mlog mismatch 0x%lx 0x%lx", rc,
+ mp->pds_name, (ulong)root_mlog_id[i], (ulong)mlprops.lpr_objid);
+ return rc;
+ }
+
+ rc = mlog_commit(mp, ml_desc);
+ if (rc) {
+ if (mlog_abort(mp, ml_desc))
+ mlog_put(ml_desc);
+
+ mp_pr_err("mpool %s, root mlog commit 0x%lx failed",
+ rc, mp->pds_name, (ulong)root_mlog_id[i]);
+ return rc;
+ }
+
+ mlog_put(ml_desc);
+ }
+
+ return rc;
+}
+
+struct mpool_descriptor *mpool_desc_alloc(void)
+{
+ struct mpool_descriptor *mp;
+ int i;
+
+ mp = kzalloc(sizeof(*mp), GFP_KERNEL);
+ if (!mp)
+ return NULL;
+
+ init_rwsem(&mp->pds_pdvlock);
+
+ mutex_init(&mp->pds_oml_lock);
+ mp->pds_oml_root = RB_ROOT;
+
+ mp->pds_mdparm.md_mclass = MP_MED_INVALID;
+
+ mpcore_params_defaults(&mp->pds_params);
+
+ for (i = 0; i < MP_MED_NUMBER; i++)
+ mp->pds_mc[i].mc_pdmc = -1;
+
+ return mp;
+}
+
+/*
+ * remove mp from mpool_pools; close all dev; dealloc mp.
+ */
+void mpool_desc_free(struct mpool_descriptor *mp)
+{
+ struct mpool_descriptor *found_mp = NULL;
+ struct mpool_uuid uuid_zero;
+ int i;
+
+ mpool_uuid_clear(&uuid_zero);
+
+ /*
+ * Handle case where poolid and devid not in mappings
+ * which can happen when cleaning up from failed create/open.
+ */
+ found_mp = uuid_to_mpdesc_search(&mpool_pools, &mp->pds_poolid);
+ if (found_mp)
+ rb_erase(&found_mp->pds_node, &mpool_pools);
+
+ for (i = 0; i < mp->pds_pdvcnt; i++) {
+ if (mpool_pd_status_get(&mp->pds_pdv[i]) != PD_STAT_UNAVAIL)
+ pd_dev_close(&mp->pds_pdv[i].pdi_parm);
+ }
+
+ kfree(mp);
+}
--
2.17.2
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  Last update: 2020-09-28 19:10    [W:0.177 / U:2.296 seconds]
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