![Dan Williams](/assets/img/avatar_default.png)
Instead of assuming that there will only ever be one allocated range at the start of the region, account for additional namespaces that might start at an offset from the region base. After this change pmem namespaces now have a reason to carry an array of resources similar to blk. Unifying the resource tracking infrastructure in nd_namespace_common is a future cleanup candidate. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
976 lines
26 KiB
C
976 lines
26 KiB
C
/*
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* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/device.h>
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#include <linux/ndctl.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/nd.h>
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#include "nd-core.h"
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#include "label.h"
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#include "nd.h"
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static u32 best_seq(u32 a, u32 b)
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{
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a &= NSINDEX_SEQ_MASK;
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b &= NSINDEX_SEQ_MASK;
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if (a == 0 || a == b)
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return b;
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else if (b == 0)
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return a;
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else if (nd_inc_seq(a) == b)
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return b;
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else
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return a;
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}
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size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd)
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{
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u32 index_span;
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if (ndd->nsindex_size)
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return ndd->nsindex_size;
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/*
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* The minimum index space is 512 bytes, with that amount of
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* index we can describe ~1400 labels which is less than a byte
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* of overhead per label. Round up to a byte of overhead per
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* label and determine the size of the index region. Yes, this
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* starts to waste space at larger config_sizes, but it's
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* unlikely we'll ever see anything but 128K.
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*/
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index_span = ndd->nsarea.config_size / 129;
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index_span /= NSINDEX_ALIGN * 2;
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ndd->nsindex_size = index_span * NSINDEX_ALIGN;
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return ndd->nsindex_size;
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}
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int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd)
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{
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return ndd->nsarea.config_size / 129;
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}
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int nd_label_validate(struct nvdimm_drvdata *ndd)
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{
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/*
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* On media label format consists of two index blocks followed
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* by an array of labels. None of these structures are ever
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* updated in place. A sequence number tracks the current
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* active index and the next one to write, while labels are
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* written to free slots.
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*
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* +------------+
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* | |
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* | nsindex0 |
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* | |
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* +------------+
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* | |
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* | nsindex1 |
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* | |
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* +------------+
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* | label0 |
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* +------------+
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* | label1 |
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* +------------+
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* | |
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* ....nslot...
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* | |
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* +------------+
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* | labelN |
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* +------------+
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*/
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struct nd_namespace_index *nsindex[] = {
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to_namespace_index(ndd, 0),
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to_namespace_index(ndd, 1),
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};
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const int num_index = ARRAY_SIZE(nsindex);
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struct device *dev = ndd->dev;
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bool valid[2] = { 0 };
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int i, num_valid = 0;
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u32 seq;
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for (i = 0; i < num_index; i++) {
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u32 nslot;
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u8 sig[NSINDEX_SIG_LEN];
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u64 sum_save, sum, size;
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memcpy(sig, nsindex[i]->sig, NSINDEX_SIG_LEN);
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if (memcmp(sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN) != 0) {
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dev_dbg(dev, "%s: nsindex%d signature invalid\n",
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__func__, i);
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continue;
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}
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sum_save = __le64_to_cpu(nsindex[i]->checksum);
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nsindex[i]->checksum = __cpu_to_le64(0);
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sum = nd_fletcher64(nsindex[i], sizeof_namespace_index(ndd), 1);
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nsindex[i]->checksum = __cpu_to_le64(sum_save);
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if (sum != sum_save) {
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dev_dbg(dev, "%s: nsindex%d checksum invalid\n",
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__func__, i);
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continue;
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}
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seq = __le32_to_cpu(nsindex[i]->seq);
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if ((seq & NSINDEX_SEQ_MASK) == 0) {
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dev_dbg(dev, "%s: nsindex%d sequence: %#x invalid\n",
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__func__, i, seq);
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continue;
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}
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/* sanity check the index against expected values */
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if (__le64_to_cpu(nsindex[i]->myoff)
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!= i * sizeof_namespace_index(ndd)) {
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dev_dbg(dev, "%s: nsindex%d myoff: %#llx invalid\n",
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__func__, i, (unsigned long long)
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__le64_to_cpu(nsindex[i]->myoff));
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continue;
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}
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if (__le64_to_cpu(nsindex[i]->otheroff)
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!= (!i) * sizeof_namespace_index(ndd)) {
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dev_dbg(dev, "%s: nsindex%d otheroff: %#llx invalid\n",
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__func__, i, (unsigned long long)
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__le64_to_cpu(nsindex[i]->otheroff));
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continue;
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}
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size = __le64_to_cpu(nsindex[i]->mysize);
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if (size > sizeof_namespace_index(ndd)
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|| size < sizeof(struct nd_namespace_index)) {
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dev_dbg(dev, "%s: nsindex%d mysize: %#llx invalid\n",
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__func__, i, size);
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continue;
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}
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nslot = __le32_to_cpu(nsindex[i]->nslot);
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if (nslot * sizeof(struct nd_namespace_label)
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+ 2 * sizeof_namespace_index(ndd)
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> ndd->nsarea.config_size) {
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dev_dbg(dev, "%s: nsindex%d nslot: %u invalid, config_size: %#x\n",
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__func__, i, nslot,
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ndd->nsarea.config_size);
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continue;
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}
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valid[i] = true;
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num_valid++;
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}
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switch (num_valid) {
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case 0:
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break;
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case 1:
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for (i = 0; i < num_index; i++)
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if (valid[i])
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return i;
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/* can't have num_valid > 0 but valid[] = { false, false } */
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WARN_ON(1);
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break;
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default:
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/* pick the best index... */
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seq = best_seq(__le32_to_cpu(nsindex[0]->seq),
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__le32_to_cpu(nsindex[1]->seq));
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if (seq == (__le32_to_cpu(nsindex[1]->seq) & NSINDEX_SEQ_MASK))
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return 1;
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else
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return 0;
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break;
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}
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return -1;
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}
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void nd_label_copy(struct nvdimm_drvdata *ndd, struct nd_namespace_index *dst,
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struct nd_namespace_index *src)
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{
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if (dst && src)
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/* pass */;
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else
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return;
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memcpy(dst, src, sizeof_namespace_index(ndd));
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}
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static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd)
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{
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void *base = to_namespace_index(ndd, 0);
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return base + 2 * sizeof_namespace_index(ndd);
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}
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static int to_slot(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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return nd_label - nd_label_base(ndd);
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}
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#define for_each_clear_bit_le(bit, addr, size) \
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for ((bit) = find_next_zero_bit_le((addr), (size), 0); \
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(bit) < (size); \
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(bit) = find_next_zero_bit_le((addr), (size), (bit) + 1))
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/**
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* preamble_index - common variable initialization for nd_label_* routines
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* @ndd: dimm container for the relevant label set
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* @idx: namespace_index index
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* @nsindex_out: on return set to the currently active namespace index
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* @free: on return set to the free label bitmap in the index
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* @nslot: on return set to the number of slots in the label space
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*/
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static bool preamble_index(struct nvdimm_drvdata *ndd, int idx,
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struct nd_namespace_index **nsindex_out,
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unsigned long **free, u32 *nslot)
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{
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struct nd_namespace_index *nsindex;
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nsindex = to_namespace_index(ndd, idx);
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if (nsindex == NULL)
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return false;
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*free = (unsigned long *) nsindex->free;
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*nslot = __le32_to_cpu(nsindex->nslot);
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*nsindex_out = nsindex;
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return true;
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}
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char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags)
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{
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if (!label_id || !uuid)
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return NULL;
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snprintf(label_id->id, ND_LABEL_ID_SIZE, "%s-%pUb",
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flags & NSLABEL_FLAG_LOCAL ? "blk" : "pmem", uuid);
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return label_id->id;
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}
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static bool preamble_current(struct nvdimm_drvdata *ndd,
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struct nd_namespace_index **nsindex,
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unsigned long **free, u32 *nslot)
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{
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return preamble_index(ndd, ndd->ns_current, nsindex,
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free, nslot);
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}
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static bool preamble_next(struct nvdimm_drvdata *ndd,
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struct nd_namespace_index **nsindex,
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unsigned long **free, u32 *nslot)
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{
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return preamble_index(ndd, ndd->ns_next, nsindex,
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free, nslot);
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}
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static bool slot_valid(struct nd_namespace_label *nd_label, u32 slot)
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{
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/* check that we are written where we expect to be written */
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if (slot != __le32_to_cpu(nd_label->slot))
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return false;
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/* check that DPA allocations are page aligned */
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if ((__le64_to_cpu(nd_label->dpa)
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| __le64_to_cpu(nd_label->rawsize)) % SZ_4K)
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return false;
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return true;
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}
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int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)
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{
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struct nd_namespace_index *nsindex;
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unsigned long *free;
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u32 nslot, slot;
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if (!preamble_current(ndd, &nsindex, &free, &nslot))
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return 0; /* no label, nothing to reserve */
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for_each_clear_bit_le(slot, free, nslot) {
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struct nd_namespace_label *nd_label;
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struct nd_region *nd_region = NULL;
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u8 label_uuid[NSLABEL_UUID_LEN];
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struct nd_label_id label_id;
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struct resource *res;
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u32 flags;
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nd_label = nd_label_base(ndd) + slot;
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if (!slot_valid(nd_label, slot))
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continue;
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memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN);
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flags = __le32_to_cpu(nd_label->flags);
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nd_label_gen_id(&label_id, label_uuid, flags);
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res = nvdimm_allocate_dpa(ndd, &label_id,
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__le64_to_cpu(nd_label->dpa),
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__le64_to_cpu(nd_label->rawsize));
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nd_dbg_dpa(nd_region, ndd, res, "reserve\n");
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if (!res)
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return -EBUSY;
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}
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return 0;
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}
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int nd_label_active_count(struct nvdimm_drvdata *ndd)
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{
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struct nd_namespace_index *nsindex;
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unsigned long *free;
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u32 nslot, slot;
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int count = 0;
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if (!preamble_current(ndd, &nsindex, &free, &nslot))
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return 0;
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for_each_clear_bit_le(slot, free, nslot) {
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struct nd_namespace_label *nd_label;
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nd_label = nd_label_base(ndd) + slot;
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if (!slot_valid(nd_label, slot)) {
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u32 label_slot = __le32_to_cpu(nd_label->slot);
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u64 size = __le64_to_cpu(nd_label->rawsize);
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u64 dpa = __le64_to_cpu(nd_label->dpa);
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dev_dbg(ndd->dev,
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"%s: slot%d invalid slot: %d dpa: %llx size: %llx\n",
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__func__, slot, label_slot, dpa, size);
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continue;
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}
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count++;
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}
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return count;
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}
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struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n)
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{
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struct nd_namespace_index *nsindex;
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unsigned long *free;
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u32 nslot, slot;
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if (!preamble_current(ndd, &nsindex, &free, &nslot))
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return NULL;
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for_each_clear_bit_le(slot, free, nslot) {
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struct nd_namespace_label *nd_label;
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nd_label = nd_label_base(ndd) + slot;
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if (!slot_valid(nd_label, slot))
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continue;
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if (n-- == 0)
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return nd_label_base(ndd) + slot;
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}
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return NULL;
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}
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u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd)
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{
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struct nd_namespace_index *nsindex;
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unsigned long *free;
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u32 nslot, slot;
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if (!preamble_next(ndd, &nsindex, &free, &nslot))
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return UINT_MAX;
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WARN_ON(!is_nvdimm_bus_locked(ndd->dev));
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slot = find_next_bit_le(free, nslot, 0);
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if (slot == nslot)
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return UINT_MAX;
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clear_bit_le(slot, free);
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return slot;
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}
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bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot)
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{
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struct nd_namespace_index *nsindex;
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unsigned long *free;
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u32 nslot;
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if (!preamble_next(ndd, &nsindex, &free, &nslot))
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return false;
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WARN_ON(!is_nvdimm_bus_locked(ndd->dev));
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if (slot < nslot)
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return !test_and_set_bit_le(slot, free);
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return false;
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}
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u32 nd_label_nfree(struct nvdimm_drvdata *ndd)
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{
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struct nd_namespace_index *nsindex;
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unsigned long *free;
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u32 nslot;
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WARN_ON(!is_nvdimm_bus_locked(ndd->dev));
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if (!preamble_next(ndd, &nsindex, &free, &nslot))
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return nvdimm_num_label_slots(ndd);
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return bitmap_weight(free, nslot);
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}
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static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq,
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unsigned long flags)
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{
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struct nd_namespace_index *nsindex;
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unsigned long offset;
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u64 checksum;
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u32 nslot;
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int rc;
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nsindex = to_namespace_index(ndd, index);
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if (flags & ND_NSINDEX_INIT)
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nslot = nvdimm_num_label_slots(ndd);
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else
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nslot = __le32_to_cpu(nsindex->nslot);
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memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN);
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nsindex->flags = __cpu_to_le32(0);
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nsindex->seq = __cpu_to_le32(seq);
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offset = (unsigned long) nsindex
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- (unsigned long) to_namespace_index(ndd, 0);
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nsindex->myoff = __cpu_to_le64(offset);
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nsindex->mysize = __cpu_to_le64(sizeof_namespace_index(ndd));
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offset = (unsigned long) to_namespace_index(ndd,
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nd_label_next_nsindex(index))
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- (unsigned long) to_namespace_index(ndd, 0);
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nsindex->otheroff = __cpu_to_le64(offset);
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offset = (unsigned long) nd_label_base(ndd)
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- (unsigned long) to_namespace_index(ndd, 0);
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nsindex->labeloff = __cpu_to_le64(offset);
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nsindex->nslot = __cpu_to_le32(nslot);
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nsindex->major = __cpu_to_le16(1);
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nsindex->minor = __cpu_to_le16(1);
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nsindex->checksum = __cpu_to_le64(0);
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if (flags & ND_NSINDEX_INIT) {
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unsigned long *free = (unsigned long *) nsindex->free;
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u32 nfree = ALIGN(nslot, BITS_PER_LONG);
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int last_bits, i;
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memset(nsindex->free, 0xff, nfree / 8);
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for (i = 0, last_bits = nfree - nslot; i < last_bits; i++)
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clear_bit_le(nslot + i, free);
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}
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checksum = nd_fletcher64(nsindex, sizeof_namespace_index(ndd), 1);
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nsindex->checksum = __cpu_to_le64(checksum);
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rc = nvdimm_set_config_data(ndd, __le64_to_cpu(nsindex->myoff),
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nsindex, sizeof_namespace_index(ndd));
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if (rc < 0)
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return rc;
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if (flags & ND_NSINDEX_INIT)
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return 0;
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/* copy the index we just wrote to the new 'next' */
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WARN_ON(index != ndd->ns_next);
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nd_label_copy(ndd, to_current_namespace_index(ndd), nsindex);
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ndd->ns_current = nd_label_next_nsindex(ndd->ns_current);
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ndd->ns_next = nd_label_next_nsindex(ndd->ns_next);
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WARN_ON(ndd->ns_current == ndd->ns_next);
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return 0;
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}
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static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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return (unsigned long) nd_label
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- (unsigned long) to_namespace_index(ndd, 0);
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}
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static int __pmem_label_update(struct nd_region *nd_region,
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struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm,
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|
int pos)
|
|
{
|
|
u64 cookie = nd_region_interleave_set_cookie(nd_region);
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct nd_label_ent *label_ent, *victim = NULL;
|
|
struct nd_namespace_label *nd_label;
|
|
struct nd_namespace_index *nsindex;
|
|
struct nd_label_id label_id;
|
|
struct resource *res;
|
|
unsigned long *free;
|
|
u32 nslot, slot;
|
|
size_t offset;
|
|
int rc;
|
|
|
|
if (!preamble_next(ndd, &nsindex, &free, &nslot))
|
|
return -ENXIO;
|
|
|
|
nd_label_gen_id(&label_id, nspm->uuid, 0);
|
|
for_each_dpa_resource(ndd, res)
|
|
if (strcmp(res->name, label_id.id) == 0)
|
|
break;
|
|
|
|
if (!res) {
|
|
WARN_ON_ONCE(1);
|
|
return -ENXIO;
|
|
}
|
|
|
|
/* allocate and write the label to the staging (next) index */
|
|
slot = nd_label_alloc_slot(ndd);
|
|
if (slot == UINT_MAX)
|
|
return -ENXIO;
|
|
dev_dbg(ndd->dev, "%s: allocated: %d\n", __func__, slot);
|
|
|
|
nd_label = nd_label_base(ndd) + slot;
|
|
memset(nd_label, 0, sizeof(struct nd_namespace_label));
|
|
memcpy(nd_label->uuid, nspm->uuid, NSLABEL_UUID_LEN);
|
|
if (nspm->alt_name)
|
|
memcpy(nd_label->name, nspm->alt_name, NSLABEL_NAME_LEN);
|
|
nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_UPDATING);
|
|
nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings);
|
|
nd_label->position = __cpu_to_le16(pos);
|
|
nd_label->isetcookie = __cpu_to_le64(cookie);
|
|
nd_label->rawsize = __cpu_to_le64(resource_size(res));
|
|
nd_label->dpa = __cpu_to_le64(res->start);
|
|
nd_label->slot = __cpu_to_le32(slot);
|
|
nd_dbg_dpa(nd_region, ndd, res, "%s\n", __func__);
|
|
|
|
/* update label */
|
|
offset = nd_label_offset(ndd, nd_label);
|
|
rc = nvdimm_set_config_data(ndd, offset, nd_label,
|
|
sizeof(struct nd_namespace_label));
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
/* Garbage collect the previous label */
|
|
mutex_lock(&nd_mapping->lock);
|
|
list_for_each_entry(label_ent, &nd_mapping->labels, list) {
|
|
if (!label_ent->label)
|
|
continue;
|
|
if (memcmp(nspm->uuid, label_ent->label->uuid,
|
|
NSLABEL_UUID_LEN) != 0)
|
|
continue;
|
|
victim = label_ent;
|
|
list_move_tail(&victim->list, &nd_mapping->labels);
|
|
break;
|
|
}
|
|
if (victim) {
|
|
dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot);
|
|
slot = to_slot(ndd, victim->label);
|
|
nd_label_free_slot(ndd, slot);
|
|
victim->label = NULL;
|
|
}
|
|
|
|
/* update index */
|
|
rc = nd_label_write_index(ndd, ndd->ns_next,
|
|
nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0);
|
|
if (rc == 0) {
|
|
list_for_each_entry(label_ent, &nd_mapping->labels, list)
|
|
if (!label_ent->label) {
|
|
label_ent->label = nd_label;
|
|
nd_label = NULL;
|
|
break;
|
|
}
|
|
dev_WARN_ONCE(&nspm->nsio.common.dev, nd_label,
|
|
"failed to track label: %d\n",
|
|
to_slot(ndd, nd_label));
|
|
if (nd_label)
|
|
rc = -ENXIO;
|
|
}
|
|
mutex_unlock(&nd_mapping->lock);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static bool is_old_resource(struct resource *res, struct resource **list, int n)
|
|
{
|
|
int i;
|
|
|
|
if (res->flags & DPA_RESOURCE_ADJUSTED)
|
|
return false;
|
|
for (i = 0; i < n; i++)
|
|
if (res == list[i])
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static struct resource *to_resource(struct nvdimm_drvdata *ndd,
|
|
struct nd_namespace_label *nd_label)
|
|
{
|
|
struct resource *res;
|
|
|
|
for_each_dpa_resource(ndd, res) {
|
|
if (res->start != __le64_to_cpu(nd_label->dpa))
|
|
continue;
|
|
if (resource_size(res) != __le64_to_cpu(nd_label->rawsize))
|
|
continue;
|
|
return res;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* 1/ Account all the labels that can be freed after this update
|
|
* 2/ Allocate and write the label to the staging (next) index
|
|
* 3/ Record the resources in the namespace device
|
|
*/
|
|
static int __blk_label_update(struct nd_region *nd_region,
|
|
struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk,
|
|
int num_labels)
|
|
{
|
|
int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO;
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct nd_namespace_label *nd_label;
|
|
struct nd_label_ent *label_ent, *e;
|
|
struct nd_namespace_index *nsindex;
|
|
unsigned long *free, *victim_map = NULL;
|
|
struct resource *res, **old_res_list;
|
|
struct nd_label_id label_id;
|
|
u8 uuid[NSLABEL_UUID_LEN];
|
|
LIST_HEAD(list);
|
|
u32 nslot, slot;
|
|
|
|
if (!preamble_next(ndd, &nsindex, &free, &nslot))
|
|
return -ENXIO;
|
|
|
|
old_res_list = nsblk->res;
|
|
nfree = nd_label_nfree(ndd);
|
|
old_num_resources = nsblk->num_resources;
|
|
nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL);
|
|
|
|
/*
|
|
* We need to loop over the old resources a few times, which seems a
|
|
* bit inefficient, but we need to know that we have the label
|
|
* space before we start mutating the tracking structures.
|
|
* Otherwise the recovery method of last resort for userspace is
|
|
* disable and re-enable the parent region.
|
|
*/
|
|
alloc = 0;
|
|
for_each_dpa_resource(ndd, res) {
|
|
if (strcmp(res->name, label_id.id) != 0)
|
|
continue;
|
|
if (!is_old_resource(res, old_res_list, old_num_resources))
|
|
alloc++;
|
|
}
|
|
|
|
victims = 0;
|
|
if (old_num_resources) {
|
|
/* convert old local-label-map to dimm-slot victim-map */
|
|
victim_map = kcalloc(BITS_TO_LONGS(nslot), sizeof(long),
|
|
GFP_KERNEL);
|
|
if (!victim_map)
|
|
return -ENOMEM;
|
|
|
|
/* mark unused labels for garbage collection */
|
|
for_each_clear_bit_le(slot, free, nslot) {
|
|
nd_label = nd_label_base(ndd) + slot;
|
|
memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN);
|
|
if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0)
|
|
continue;
|
|
res = to_resource(ndd, nd_label);
|
|
if (res && is_old_resource(res, old_res_list,
|
|
old_num_resources))
|
|
continue;
|
|
slot = to_slot(ndd, nd_label);
|
|
set_bit(slot, victim_map);
|
|
victims++;
|
|
}
|
|
}
|
|
|
|
/* don't allow updates that consume the last label */
|
|
if (nfree - alloc < 0 || nfree - alloc + victims < 1) {
|
|
dev_info(&nsblk->common.dev, "insufficient label space\n");
|
|
kfree(victim_map);
|
|
return -ENOSPC;
|
|
}
|
|
/* from here on we need to abort on error */
|
|
|
|
|
|
/* assign all resources to the namespace before writing the labels */
|
|
nsblk->res = NULL;
|
|
nsblk->num_resources = 0;
|
|
for_each_dpa_resource(ndd, res) {
|
|
if (strcmp(res->name, label_id.id) != 0)
|
|
continue;
|
|
if (!nsblk_add_resource(nd_region, ndd, nsblk, res->start)) {
|
|
rc = -ENOMEM;
|
|
goto abort;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < nsblk->num_resources; i++) {
|
|
size_t offset;
|
|
|
|
res = nsblk->res[i];
|
|
if (is_old_resource(res, old_res_list, old_num_resources))
|
|
continue; /* carry-over */
|
|
slot = nd_label_alloc_slot(ndd);
|
|
if (slot == UINT_MAX)
|
|
goto abort;
|
|
dev_dbg(ndd->dev, "%s: allocated: %d\n", __func__, slot);
|
|
|
|
nd_label = nd_label_base(ndd) + slot;
|
|
memset(nd_label, 0, sizeof(struct nd_namespace_label));
|
|
memcpy(nd_label->uuid, nsblk->uuid, NSLABEL_UUID_LEN);
|
|
if (nsblk->alt_name)
|
|
memcpy(nd_label->name, nsblk->alt_name,
|
|
NSLABEL_NAME_LEN);
|
|
nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_LOCAL);
|
|
nd_label->nlabel = __cpu_to_le16(0); /* N/A */
|
|
nd_label->position = __cpu_to_le16(0); /* N/A */
|
|
nd_label->isetcookie = __cpu_to_le64(0); /* N/A */
|
|
nd_label->dpa = __cpu_to_le64(res->start);
|
|
nd_label->rawsize = __cpu_to_le64(resource_size(res));
|
|
nd_label->lbasize = __cpu_to_le64(nsblk->lbasize);
|
|
nd_label->slot = __cpu_to_le32(slot);
|
|
|
|
/* update label */
|
|
offset = nd_label_offset(ndd, nd_label);
|
|
rc = nvdimm_set_config_data(ndd, offset, nd_label,
|
|
sizeof(struct nd_namespace_label));
|
|
if (rc < 0)
|
|
goto abort;
|
|
}
|
|
|
|
/* free up now unused slots in the new index */
|
|
for_each_set_bit(slot, victim_map, victim_map ? nslot : 0) {
|
|
dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot);
|
|
nd_label_free_slot(ndd, slot);
|
|
}
|
|
|
|
/* update index */
|
|
rc = nd_label_write_index(ndd, ndd->ns_next,
|
|
nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0);
|
|
if (rc)
|
|
goto abort;
|
|
|
|
/*
|
|
* Now that the on-dimm labels are up to date, fix up the tracking
|
|
* entries in nd_mapping->labels
|
|
*/
|
|
nlabel = 0;
|
|
mutex_lock(&nd_mapping->lock);
|
|
list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) {
|
|
nd_label = label_ent->label;
|
|
if (!nd_label)
|
|
continue;
|
|
nlabel++;
|
|
memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN);
|
|
if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0)
|
|
continue;
|
|
nlabel--;
|
|
list_move(&label_ent->list, &list);
|
|
label_ent->label = NULL;
|
|
}
|
|
list_splice_tail_init(&list, &nd_mapping->labels);
|
|
mutex_unlock(&nd_mapping->lock);
|
|
|
|
if (nlabel + nsblk->num_resources > num_labels) {
|
|
/*
|
|
* Bug, we can't end up with more resources than
|
|
* available labels
|
|
*/
|
|
WARN_ON_ONCE(1);
|
|
rc = -ENXIO;
|
|
goto out;
|
|
}
|
|
|
|
mutex_lock(&nd_mapping->lock);
|
|
label_ent = list_first_entry_or_null(&nd_mapping->labels,
|
|
typeof(*label_ent), list);
|
|
if (!label_ent) {
|
|
WARN_ON(1);
|
|
mutex_unlock(&nd_mapping->lock);
|
|
rc = -ENXIO;
|
|
goto out;
|
|
}
|
|
for_each_clear_bit_le(slot, free, nslot) {
|
|
nd_label = nd_label_base(ndd) + slot;
|
|
memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN);
|
|
if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0)
|
|
continue;
|
|
res = to_resource(ndd, nd_label);
|
|
res->flags &= ~DPA_RESOURCE_ADJUSTED;
|
|
dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot);
|
|
list_for_each_entry_from(label_ent, &nd_mapping->labels, list) {
|
|
if (label_ent->label)
|
|
continue;
|
|
label_ent->label = nd_label;
|
|
nd_label = NULL;
|
|
break;
|
|
}
|
|
if (nd_label)
|
|
dev_WARN(&nsblk->common.dev,
|
|
"failed to track label slot%d\n", slot);
|
|
}
|
|
mutex_unlock(&nd_mapping->lock);
|
|
|
|
out:
|
|
kfree(old_res_list);
|
|
kfree(victim_map);
|
|
return rc;
|
|
|
|
abort:
|
|
/*
|
|
* 1/ repair the allocated label bitmap in the index
|
|
* 2/ restore the resource list
|
|
*/
|
|
nd_label_copy(ndd, nsindex, to_current_namespace_index(ndd));
|
|
kfree(nsblk->res);
|
|
nsblk->res = old_res_list;
|
|
nsblk->num_resources = old_num_resources;
|
|
old_res_list = NULL;
|
|
goto out;
|
|
}
|
|
|
|
static int init_labels(struct nd_mapping *nd_mapping, int num_labels)
|
|
{
|
|
int i, old_num_labels = 0;
|
|
struct nd_label_ent *label_ent;
|
|
struct nd_namespace_index *nsindex;
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
|
|
mutex_lock(&nd_mapping->lock);
|
|
list_for_each_entry(label_ent, &nd_mapping->labels, list)
|
|
old_num_labels++;
|
|
mutex_unlock(&nd_mapping->lock);
|
|
|
|
/*
|
|
* We need to preserve all the old labels for the mapping so
|
|
* they can be garbage collected after writing the new labels.
|
|
*/
|
|
for (i = old_num_labels; i < num_labels; i++) {
|
|
label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL);
|
|
if (!label_ent)
|
|
return -ENOMEM;
|
|
mutex_lock(&nd_mapping->lock);
|
|
list_add_tail(&label_ent->list, &nd_mapping->labels);
|
|
mutex_unlock(&nd_mapping->lock);
|
|
}
|
|
|
|
if (ndd->ns_current == -1 || ndd->ns_next == -1)
|
|
/* pass */;
|
|
else
|
|
return max(num_labels, old_num_labels);
|
|
|
|
nsindex = to_namespace_index(ndd, 0);
|
|
memset(nsindex, 0, ndd->nsarea.config_size);
|
|
for (i = 0; i < 2; i++) {
|
|
int rc = nd_label_write_index(ndd, i, i*2, ND_NSINDEX_INIT);
|
|
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
ndd->ns_next = 1;
|
|
ndd->ns_current = 0;
|
|
|
|
return max(num_labels, old_num_labels);
|
|
}
|
|
|
|
static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid)
|
|
{
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct nd_label_ent *label_ent, *e;
|
|
struct nd_namespace_index *nsindex;
|
|
u8 label_uuid[NSLABEL_UUID_LEN];
|
|
unsigned long *free;
|
|
LIST_HEAD(list);
|
|
u32 nslot, slot;
|
|
int active = 0;
|
|
|
|
if (!uuid)
|
|
return 0;
|
|
|
|
/* no index || no labels == nothing to delete */
|
|
if (!preamble_next(ndd, &nsindex, &free, &nslot))
|
|
return 0;
|
|
|
|
mutex_lock(&nd_mapping->lock);
|
|
list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) {
|
|
struct nd_namespace_label *nd_label = label_ent->label;
|
|
|
|
if (!nd_label)
|
|
continue;
|
|
active++;
|
|
memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN);
|
|
if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0)
|
|
continue;
|
|
active--;
|
|
slot = to_slot(ndd, nd_label);
|
|
nd_label_free_slot(ndd, slot);
|
|
dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot);
|
|
list_move_tail(&label_ent->list, &list);
|
|
label_ent->label = NULL;
|
|
}
|
|
list_splice_tail_init(&list, &nd_mapping->labels);
|
|
|
|
if (active == 0) {
|
|
nd_mapping_free_labels(nd_mapping);
|
|
dev_dbg(ndd->dev, "%s: no more active labels\n", __func__);
|
|
}
|
|
mutex_unlock(&nd_mapping->lock);
|
|
|
|
return nd_label_write_index(ndd, ndd->ns_next,
|
|
nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0);
|
|
}
|
|
|
|
int nd_pmem_namespace_label_update(struct nd_region *nd_region,
|
|
struct nd_namespace_pmem *nspm, resource_size_t size)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct resource *res;
|
|
int rc, count = 0;
|
|
|
|
if (size == 0) {
|
|
rc = del_labels(nd_mapping, nspm->uuid);
|
|
if (rc)
|
|
return rc;
|
|
continue;
|
|
}
|
|
|
|
for_each_dpa_resource(ndd, res)
|
|
if (strncmp(res->name, "pmem", 3) == 0)
|
|
count++;
|
|
WARN_ON_ONCE(!count);
|
|
|
|
rc = init_labels(nd_mapping, count);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
rc = __pmem_label_update(nd_region, nd_mapping, nspm, i);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nd_blk_namespace_label_update(struct nd_region *nd_region,
|
|
struct nd_namespace_blk *nsblk, resource_size_t size)
|
|
{
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
|
|
struct resource *res;
|
|
int count = 0;
|
|
|
|
if (size == 0)
|
|
return del_labels(nd_mapping, nsblk->uuid);
|
|
|
|
for_each_dpa_resource(to_ndd(nd_mapping), res)
|
|
count++;
|
|
|
|
count = init_labels(nd_mapping, count);
|
|
if (count < 0)
|
|
return count;
|
|
|
|
return __blk_label_update(nd_region, nd_mapping, nsblk, count);
|
|
}
|