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1331 lines
36 KiB
1331 lines
36 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright(c) 2013-2015 Intel Corporation. All rights reserved. |
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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/uuid.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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|
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static guid_t nvdimm_btt_guid; |
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static guid_t nvdimm_btt2_guid; |
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static guid_t nvdimm_pfn_guid; |
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static guid_t nvdimm_dax_guid; |
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|
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static const char NSINDEX_SIGNATURE[] = "NAMESPACE_INDEX\0"; |
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|
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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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|
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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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|
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unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd) |
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{ |
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return ndd->nslabel_size; |
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} |
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|
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static size_t __sizeof_namespace_index(u32 nslot) |
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{ |
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return ALIGN(sizeof(struct nd_namespace_index) + DIV_ROUND_UP(nslot, 8), |
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NSINDEX_ALIGN); |
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} |
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|
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static int __nvdimm_num_label_slots(struct nvdimm_drvdata *ndd, |
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size_t index_size) |
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{ |
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return (ndd->nsarea.config_size - index_size * 2) / |
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sizeof_namespace_label(ndd); |
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} |
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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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u32 tmp_nslot, n; |
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|
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tmp_nslot = ndd->nsarea.config_size / sizeof_namespace_label(ndd); |
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n = __sizeof_namespace_index(tmp_nslot) / NSINDEX_ALIGN; |
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|
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return __nvdimm_num_label_slots(ndd, NSINDEX_ALIGN * n); |
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} |
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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 nslot, space, size; |
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|
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/* |
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* Per UEFI 2.7, the minimum size of the Label Storage Area is large |
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* enough to hold 2 index blocks and 2 labels. The minimum index |
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* block size is 256 bytes. The label size is 128 for namespaces |
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* prior to version 1.2 and at minimum 256 for version 1.2 and later. |
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*/ |
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nslot = nvdimm_num_label_slots(ndd); |
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space = ndd->nsarea.config_size - nslot * sizeof_namespace_label(ndd); |
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size = __sizeof_namespace_index(nslot) * 2; |
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if (size <= space && nslot >= 2) |
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return size / 2; |
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|
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dev_err(ndd->dev, "label area (%d) too small to host (%d byte) labels\n", |
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ndd->nsarea.config_size, sizeof_namespace_label(ndd)); |
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return 0; |
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} |
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|
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static 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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|
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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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unsigned int version, labelsize; |
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|
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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, "nsindex%d signature invalid\n", i); |
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continue; |
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} |
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|
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/* label sizes larger than 128 arrived with v1.2 */ |
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version = __le16_to_cpu(nsindex[i]->major) * 100 |
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+ __le16_to_cpu(nsindex[i]->minor); |
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if (version >= 102) |
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labelsize = 1 << (7 + nsindex[i]->labelsize); |
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else |
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labelsize = 128; |
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|
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if (labelsize != sizeof_namespace_label(ndd)) { |
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dev_dbg(dev, "nsindex%d labelsize %d invalid\n", |
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i, nsindex[i]->labelsize); |
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continue; |
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} |
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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, "nsindex%d checksum invalid\n", i); |
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continue; |
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} |
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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, "nsindex%d sequence: %#x invalid\n", i, seq); |
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continue; |
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} |
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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, "nsindex%d myoff: %#llx invalid\n", |
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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, "nsindex%d otheroff: %#llx invalid\n", |
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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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if (__le64_to_cpu(nsindex[i]->labeloff) |
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!= 2 * sizeof_namespace_index(ndd)) { |
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dev_dbg(dev, "nsindex%d labeloff: %#llx invalid\n", |
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i, (unsigned long long) |
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__le64_to_cpu(nsindex[i]->labeloff)); |
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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, "nsindex%d mysize: %#llx invalid\n", i, size); |
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continue; |
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} |
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|
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nslot = __le32_to_cpu(nsindex[i]->nslot); |
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if (nslot * sizeof_namespace_label(ndd) |
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+ 2 * sizeof_namespace_index(ndd) |
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> ndd->nsarea.config_size) { |
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dev_dbg(dev, "nsindex%d nslot: %u invalid, config_size: %#x\n", |
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i, nslot, 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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|
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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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|
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return -1; |
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} |
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|
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static int nd_label_validate(struct nvdimm_drvdata *ndd) |
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{ |
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/* |
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* In order to probe for and validate namespace index blocks we |
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* need to know the size of the labels, and we can't trust the |
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* size of the labels until we validate the index blocks. |
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* Resolve this dependency loop by probing for known label |
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* sizes, but default to v1.2 256-byte namespace labels if |
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* discovery fails. |
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*/ |
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int label_size[] = { 128, 256 }; |
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int i, rc; |
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|
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for (i = 0; i < ARRAY_SIZE(label_size); i++) { |
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ndd->nslabel_size = label_size[i]; |
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rc = __nd_label_validate(ndd); |
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if (rc >= 0) |
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return rc; |
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} |
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|
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return -1; |
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} |
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|
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static void nd_label_copy(struct nvdimm_drvdata *ndd, |
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struct nd_namespace_index *dst, |
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struct nd_namespace_index *src) |
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{ |
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/* just exit if either destination or source is NULL */ |
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if (!dst || !src) |
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return; |
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|
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memcpy(dst, src, sizeof_namespace_index(ndd)); |
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} |
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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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|
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return base + 2 * sizeof_namespace_index(ndd); |
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} |
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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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unsigned long label, base; |
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|
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label = (unsigned long) nd_label; |
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base = (unsigned long) nd_label_base(ndd); |
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|
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return (label - base) / sizeof_namespace_label(ndd); |
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} |
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|
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static struct nd_namespace_label *to_label(struct nvdimm_drvdata *ndd, int slot) |
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{ |
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unsigned long label, base; |
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|
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base = (unsigned long) nd_label_base(ndd); |
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label = base + sizeof_namespace_label(ndd) * slot; |
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|
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return (struct nd_namespace_label *) label; |
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} |
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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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/** |
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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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|
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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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|
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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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|
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return true; |
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} |
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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 nvdimm_drvdata *ndd, |
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struct nd_namespace_label *nd_label, u32 slot) |
|
{ |
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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 checksum */ |
|
if (namespace_label_has(ndd, checksum)) { |
|
u64 sum, sum_save; |
|
|
|
sum_save = __le64_to_cpu(nd_label->checksum); |
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nd_label->checksum = __cpu_to_le64(0); |
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sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); |
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nd_label->checksum = __cpu_to_le64(sum_save); |
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if (sum != sum_save) { |
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dev_dbg(ndd->dev, "fail checksum. slot: %d expect: %#llx\n", |
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slot, sum); |
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return false; |
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} |
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} |
|
|
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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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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) { |
|
struct nvdimm *nvdimm = to_nvdimm(ndd->dev); |
|
struct nd_namespace_label *nd_label; |
|
struct nd_region *nd_region = NULL; |
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u8 label_uuid[NSLABEL_UUID_LEN]; |
|
struct nd_label_id label_id; |
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struct resource *res; |
|
u32 flags; |
|
|
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nd_label = to_label(ndd, slot); |
|
|
|
if (!slot_valid(ndd, nd_label, slot)) |
|
continue; |
|
|
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memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); |
|
flags = __le32_to_cpu(nd_label->flags); |
|
if (test_bit(NDD_NOBLK, &nvdimm->flags)) |
|
flags &= ~NSLABEL_FLAG_LOCAL; |
|
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), |
|
__le64_to_cpu(nd_label->rawsize)); |
|
nd_dbg_dpa(nd_region, ndd, res, "reserve\n"); |
|
if (!res) |
|
return -EBUSY; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int nd_label_data_init(struct nvdimm_drvdata *ndd) |
|
{ |
|
size_t config_size, read_size, max_xfer, offset; |
|
struct nd_namespace_index *nsindex; |
|
unsigned int i; |
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int rc = 0; |
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u32 nslot; |
|
|
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if (ndd->data) |
|
return 0; |
|
|
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if (ndd->nsarea.status || ndd->nsarea.max_xfer == 0) { |
|
dev_dbg(ndd->dev, "failed to init config data area: (%u:%u)\n", |
|
ndd->nsarea.max_xfer, ndd->nsarea.config_size); |
|
return -ENXIO; |
|
} |
|
|
|
/* |
|
* We need to determine the maximum index area as this is the section |
|
* we must read and validate before we can start processing labels. |
|
* |
|
* If the area is too small to contain the two indexes and 2 labels |
|
* then we abort. |
|
* |
|
* Start at a label size of 128 as this should result in the largest |
|
* possible namespace index size. |
|
*/ |
|
ndd->nslabel_size = 128; |
|
read_size = sizeof_namespace_index(ndd) * 2; |
|
if (!read_size) |
|
return -ENXIO; |
|
|
|
/* Allocate config data */ |
|
config_size = ndd->nsarea.config_size; |
|
ndd->data = kvzalloc(config_size, GFP_KERNEL); |
|
if (!ndd->data) |
|
return -ENOMEM; |
|
|
|
/* |
|
* We want to guarantee as few reads as possible while conserving |
|
* memory. To do that we figure out how much unused space will be left |
|
* in the last read, divide that by the total number of reads it is |
|
* going to take given our maximum transfer size, and then reduce our |
|
* maximum transfer size based on that result. |
|
*/ |
|
max_xfer = min_t(size_t, ndd->nsarea.max_xfer, config_size); |
|
if (read_size < max_xfer) { |
|
/* trim waste */ |
|
max_xfer -= ((max_xfer - 1) - (config_size - 1) % max_xfer) / |
|
DIV_ROUND_UP(config_size, max_xfer); |
|
/* make certain we read indexes in exactly 1 read */ |
|
if (max_xfer < read_size) |
|
max_xfer = read_size; |
|
} |
|
|
|
/* Make our initial read size a multiple of max_xfer size */ |
|
read_size = min(DIV_ROUND_UP(read_size, max_xfer) * max_xfer, |
|
config_size); |
|
|
|
/* Read the index data */ |
|
rc = nvdimm_get_config_data(ndd, ndd->data, 0, read_size); |
|
if (rc) |
|
goto out_err; |
|
|
|
/* Validate index data, if not valid assume all labels are invalid */ |
|
ndd->ns_current = nd_label_validate(ndd); |
|
if (ndd->ns_current < 0) |
|
return 0; |
|
|
|
/* Record our index values */ |
|
ndd->ns_next = nd_label_next_nsindex(ndd->ns_current); |
|
|
|
/* Copy "current" index on top of the "next" index */ |
|
nsindex = to_current_namespace_index(ndd); |
|
nd_label_copy(ndd, to_next_namespace_index(ndd), nsindex); |
|
|
|
/* Determine starting offset for label data */ |
|
offset = __le64_to_cpu(nsindex->labeloff); |
|
nslot = __le32_to_cpu(nsindex->nslot); |
|
|
|
/* Loop through the free list pulling in any active labels */ |
|
for (i = 0; i < nslot; i++, offset += ndd->nslabel_size) { |
|
size_t label_read_size; |
|
|
|
/* zero out the unused labels */ |
|
if (test_bit_le(i, nsindex->free)) { |
|
memset(ndd->data + offset, 0, ndd->nslabel_size); |
|
continue; |
|
} |
|
|
|
/* if we already read past here then just continue */ |
|
if (offset + ndd->nslabel_size <= read_size) |
|
continue; |
|
|
|
/* if we haven't read in a while reset our read_size offset */ |
|
if (read_size < offset) |
|
read_size = offset; |
|
|
|
/* determine how much more will be read after this next call. */ |
|
label_read_size = offset + ndd->nslabel_size - read_size; |
|
label_read_size = DIV_ROUND_UP(label_read_size, max_xfer) * |
|
max_xfer; |
|
|
|
/* truncate last read if needed */ |
|
if (read_size + label_read_size > config_size) |
|
label_read_size = config_size - read_size; |
|
|
|
/* Read the label data */ |
|
rc = nvdimm_get_config_data(ndd, ndd->data + read_size, |
|
read_size, label_read_size); |
|
if (rc) |
|
goto out_err; |
|
|
|
/* push read_size to next read offset */ |
|
read_size += label_read_size; |
|
} |
|
|
|
dev_dbg(ndd->dev, "len: %zu rc: %d\n", offset, rc); |
|
out_err: |
|
return rc; |
|
} |
|
|
|
int nd_label_active_count(struct nvdimm_drvdata *ndd) |
|
{ |
|
struct nd_namespace_index *nsindex; |
|
unsigned long *free; |
|
u32 nslot, slot; |
|
int count = 0; |
|
|
|
if (!preamble_current(ndd, &nsindex, &free, &nslot)) |
|
return 0; |
|
|
|
for_each_clear_bit_le(slot, free, nslot) { |
|
struct nd_namespace_label *nd_label; |
|
|
|
nd_label = to_label(ndd, slot); |
|
|
|
if (!slot_valid(ndd, nd_label, slot)) { |
|
u32 label_slot = __le32_to_cpu(nd_label->slot); |
|
u64 size = __le64_to_cpu(nd_label->rawsize); |
|
u64 dpa = __le64_to_cpu(nd_label->dpa); |
|
|
|
dev_dbg(ndd->dev, |
|
"slot%d invalid slot: %d dpa: %llx size: %llx\n", |
|
slot, label_slot, dpa, size); |
|
continue; |
|
} |
|
count++; |
|
} |
|
return count; |
|
} |
|
|
|
struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n) |
|
{ |
|
struct nd_namespace_index *nsindex; |
|
unsigned long *free; |
|
u32 nslot, slot; |
|
|
|
if (!preamble_current(ndd, &nsindex, &free, &nslot)) |
|
return NULL; |
|
|
|
for_each_clear_bit_le(slot, free, nslot) { |
|
struct nd_namespace_label *nd_label; |
|
|
|
nd_label = to_label(ndd, slot); |
|
if (!slot_valid(ndd, nd_label, slot)) |
|
continue; |
|
|
|
if (n-- == 0) |
|
return to_label(ndd, slot); |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd) |
|
{ |
|
struct nd_namespace_index *nsindex; |
|
unsigned long *free; |
|
u32 nslot, slot; |
|
|
|
if (!preamble_next(ndd, &nsindex, &free, &nslot)) |
|
return UINT_MAX; |
|
|
|
WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); |
|
|
|
slot = find_next_bit_le(free, nslot, 0); |
|
if (slot == nslot) |
|
return UINT_MAX; |
|
|
|
clear_bit_le(slot, free); |
|
|
|
return slot; |
|
} |
|
|
|
bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot) |
|
{ |
|
struct nd_namespace_index *nsindex; |
|
unsigned long *free; |
|
u32 nslot; |
|
|
|
if (!preamble_next(ndd, &nsindex, &free, &nslot)) |
|
return false; |
|
|
|
WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); |
|
|
|
if (slot < nslot) |
|
return !test_and_set_bit_le(slot, free); |
|
return false; |
|
} |
|
|
|
u32 nd_label_nfree(struct nvdimm_drvdata *ndd) |
|
{ |
|
struct nd_namespace_index *nsindex; |
|
unsigned long *free; |
|
u32 nslot; |
|
|
|
WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); |
|
|
|
if (!preamble_next(ndd, &nsindex, &free, &nslot)) |
|
return nvdimm_num_label_slots(ndd); |
|
|
|
return bitmap_weight(free, nslot); |
|
} |
|
|
|
static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq, |
|
unsigned long flags) |
|
{ |
|
struct nd_namespace_index *nsindex; |
|
unsigned long offset; |
|
u64 checksum; |
|
u32 nslot; |
|
int rc; |
|
|
|
nsindex = to_namespace_index(ndd, index); |
|
if (flags & ND_NSINDEX_INIT) |
|
nslot = nvdimm_num_label_slots(ndd); |
|
else |
|
nslot = __le32_to_cpu(nsindex->nslot); |
|
|
|
memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN); |
|
memset(&nsindex->flags, 0, 3); |
|
nsindex->labelsize = sizeof_namespace_label(ndd) >> 8; |
|
nsindex->seq = __cpu_to_le32(seq); |
|
offset = (unsigned long) nsindex |
|
- (unsigned long) to_namespace_index(ndd, 0); |
|
nsindex->myoff = __cpu_to_le64(offset); |
|
nsindex->mysize = __cpu_to_le64(sizeof_namespace_index(ndd)); |
|
offset = (unsigned long) to_namespace_index(ndd, |
|
nd_label_next_nsindex(index)) |
|
- (unsigned long) to_namespace_index(ndd, 0); |
|
nsindex->otheroff = __cpu_to_le64(offset); |
|
offset = (unsigned long) nd_label_base(ndd) |
|
- (unsigned long) to_namespace_index(ndd, 0); |
|
nsindex->labeloff = __cpu_to_le64(offset); |
|
nsindex->nslot = __cpu_to_le32(nslot); |
|
nsindex->major = __cpu_to_le16(1); |
|
if (sizeof_namespace_label(ndd) < 256) |
|
nsindex->minor = __cpu_to_le16(1); |
|
else |
|
nsindex->minor = __cpu_to_le16(2); |
|
nsindex->checksum = __cpu_to_le64(0); |
|
if (flags & ND_NSINDEX_INIT) { |
|
unsigned long *free = (unsigned long *) nsindex->free; |
|
u32 nfree = ALIGN(nslot, BITS_PER_LONG); |
|
int last_bits, i; |
|
|
|
memset(nsindex->free, 0xff, nfree / 8); |
|
for (i = 0, last_bits = nfree - nslot; i < last_bits; i++) |
|
clear_bit_le(nslot + i, free); |
|
} |
|
checksum = nd_fletcher64(nsindex, sizeof_namespace_index(ndd), 1); |
|
nsindex->checksum = __cpu_to_le64(checksum); |
|
rc = nvdimm_set_config_data(ndd, __le64_to_cpu(nsindex->myoff), |
|
nsindex, sizeof_namespace_index(ndd)); |
|
if (rc < 0) |
|
return rc; |
|
|
|
if (flags & ND_NSINDEX_INIT) |
|
return 0; |
|
|
|
/* copy the index we just wrote to the new 'next' */ |
|
WARN_ON(index != ndd->ns_next); |
|
nd_label_copy(ndd, to_current_namespace_index(ndd), nsindex); |
|
ndd->ns_current = nd_label_next_nsindex(ndd->ns_current); |
|
ndd->ns_next = nd_label_next_nsindex(ndd->ns_next); |
|
WARN_ON(ndd->ns_current == ndd->ns_next); |
|
|
|
return 0; |
|
} |
|
|
|
static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd, |
|
struct nd_namespace_label *nd_label) |
|
{ |
|
return (unsigned long) nd_label |
|
- (unsigned long) to_namespace_index(ndd, 0); |
|
} |
|
|
|
enum nvdimm_claim_class to_nvdimm_cclass(guid_t *guid) |
|
{ |
|
if (guid_equal(guid, &nvdimm_btt_guid)) |
|
return NVDIMM_CCLASS_BTT; |
|
else if (guid_equal(guid, &nvdimm_btt2_guid)) |
|
return NVDIMM_CCLASS_BTT2; |
|
else if (guid_equal(guid, &nvdimm_pfn_guid)) |
|
return NVDIMM_CCLASS_PFN; |
|
else if (guid_equal(guid, &nvdimm_dax_guid)) |
|
return NVDIMM_CCLASS_DAX; |
|
else if (guid_equal(guid, &guid_null)) |
|
return NVDIMM_CCLASS_NONE; |
|
|
|
return NVDIMM_CCLASS_UNKNOWN; |
|
} |
|
|
|
static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, |
|
guid_t *target) |
|
{ |
|
if (claim_class == NVDIMM_CCLASS_BTT) |
|
return &nvdimm_btt_guid; |
|
else if (claim_class == NVDIMM_CCLASS_BTT2) |
|
return &nvdimm_btt2_guid; |
|
else if (claim_class == NVDIMM_CCLASS_PFN) |
|
return &nvdimm_pfn_guid; |
|
else if (claim_class == NVDIMM_CCLASS_DAX) |
|
return &nvdimm_dax_guid; |
|
else if (claim_class == NVDIMM_CCLASS_UNKNOWN) { |
|
/* |
|
* If we're modifying a namespace for which we don't |
|
* know the claim_class, don't touch the existing guid. |
|
*/ |
|
return target; |
|
} else |
|
return &guid_null; |
|
} |
|
|
|
static void reap_victim(struct nd_mapping *nd_mapping, |
|
struct nd_label_ent *victim) |
|
{ |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
u32 slot = to_slot(ndd, victim->label); |
|
|
|
dev_dbg(ndd->dev, "free: %d\n", slot); |
|
nd_label_free_slot(ndd, slot); |
|
victim->label = NULL; |
|
} |
|
|
|
static int __pmem_label_update(struct nd_region *nd_region, |
|
struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, |
|
int pos, unsigned long flags) |
|
{ |
|
struct nd_namespace_common *ndns = &nspm->nsio.common; |
|
struct nd_interleave_set *nd_set = nd_region->nd_set; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct nd_namespace_label *nd_label; |
|
struct nd_namespace_index *nsindex; |
|
struct nd_label_ent *label_ent; |
|
struct nd_label_id label_id; |
|
struct resource *res; |
|
unsigned long *free; |
|
u32 nslot, slot; |
|
size_t offset; |
|
u64 cookie; |
|
int rc; |
|
|
|
if (!preamble_next(ndd, &nsindex, &free, &nslot)) |
|
return -ENXIO; |
|
|
|
cookie = nd_region_interleave_set_cookie(nd_region, nsindex); |
|
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, "allocated: %d\n", slot); |
|
|
|
nd_label = to_label(ndd, slot); |
|
memset(nd_label, 0, sizeof_namespace_label(ndd)); |
|
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(flags); |
|
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->lbasize = __cpu_to_le64(nspm->lbasize); |
|
nd_label->dpa = __cpu_to_le64(res->start); |
|
nd_label->slot = __cpu_to_le32(slot); |
|
if (namespace_label_has(ndd, type_guid)) |
|
guid_copy(&nd_label->type_guid, &nd_set->type_guid); |
|
if (namespace_label_has(ndd, abstraction_guid)) |
|
guid_copy(&nd_label->abstraction_guid, |
|
to_abstraction_guid(ndns->claim_class, |
|
&nd_label->abstraction_guid)); |
|
if (namespace_label_has(ndd, checksum)) { |
|
u64 sum; |
|
|
|
nd_label->checksum = __cpu_to_le64(0); |
|
sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); |
|
nd_label->checksum = __cpu_to_le64(sum); |
|
} |
|
nd_dbg_dpa(nd_region, ndd, res, "\n"); |
|
|
|
/* update label */ |
|
offset = nd_label_offset(ndd, nd_label); |
|
rc = nvdimm_set_config_data(ndd, offset, nd_label, |
|
sizeof_namespace_label(ndd)); |
|
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 (test_and_clear_bit(ND_LABEL_REAP, &label_ent->flags) |
|
|| memcmp(nspm->uuid, label_ent->label->uuid, |
|
NSLABEL_UUID_LEN) == 0) |
|
reap_victim(nd_mapping, label_ent); |
|
} |
|
|
|
/* 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 nd_interleave_set *nd_set = nd_region->nd_set; |
|
struct nd_namespace_common *ndns = &nsblk->common; |
|
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]; |
|
int min_dpa_idx = 0; |
|
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 = bitmap_zalloc(nslot, GFP_KERNEL); |
|
if (!victim_map) |
|
return -ENOMEM; |
|
|
|
/* mark unused labels for garbage collection */ |
|
for_each_clear_bit_le(slot, free, nslot) { |
|
nd_label = to_label(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"); |
|
bitmap_free(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; |
|
} |
|
} |
|
|
|
/* release slots associated with any invalidated UUIDs */ |
|
mutex_lock(&nd_mapping->lock); |
|
list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) |
|
if (test_and_clear_bit(ND_LABEL_REAP, &label_ent->flags)) { |
|
reap_victim(nd_mapping, label_ent); |
|
list_move(&label_ent->list, &list); |
|
} |
|
mutex_unlock(&nd_mapping->lock); |
|
|
|
/* |
|
* Find the resource associated with the first label in the set |
|
* per the v1.2 namespace specification. |
|
*/ |
|
for (i = 0; i < nsblk->num_resources; i++) { |
|
struct resource *min = nsblk->res[min_dpa_idx]; |
|
|
|
res = nsblk->res[i]; |
|
if (res->start < min->start) |
|
min_dpa_idx = i; |
|
} |
|
|
|
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) { |
|
rc = -ENXIO; |
|
goto abort; |
|
} |
|
dev_dbg(ndd->dev, "allocated: %d\n", slot); |
|
|
|
nd_label = to_label(ndd, slot); |
|
memset(nd_label, 0, sizeof_namespace_label(ndd)); |
|
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); |
|
|
|
/* |
|
* Use the presence of the type_guid as a flag to |
|
* determine isetcookie usage and nlabel + position |
|
* policy for blk-aperture namespaces. |
|
*/ |
|
if (namespace_label_has(ndd, type_guid)) { |
|
if (i == min_dpa_idx) { |
|
nd_label->nlabel = __cpu_to_le16(nsblk->num_resources); |
|
nd_label->position = __cpu_to_le16(0); |
|
} else { |
|
nd_label->nlabel = __cpu_to_le16(0xffff); |
|
nd_label->position = __cpu_to_le16(0xffff); |
|
} |
|
nd_label->isetcookie = __cpu_to_le64(nd_set->cookie2); |
|
} else { |
|
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); |
|
if (namespace_label_has(ndd, type_guid)) |
|
guid_copy(&nd_label->type_guid, &nd_set->type_guid); |
|
if (namespace_label_has(ndd, abstraction_guid)) |
|
guid_copy(&nd_label->abstraction_guid, |
|
to_abstraction_guid(ndns->claim_class, |
|
&nd_label->abstraction_guid)); |
|
|
|
if (namespace_label_has(ndd, checksum)) { |
|
u64 sum; |
|
|
|
nd_label->checksum = __cpu_to_le64(0); |
|
sum = nd_fletcher64(nd_label, |
|
sizeof_namespace_label(ndd), 1); |
|
nd_label->checksum = __cpu_to_le64(sum); |
|
} |
|
|
|
/* update label */ |
|
offset = nd_label_offset(ndd, nd_label); |
|
rc = nvdimm_set_config_data(ndd, offset, nd_label, |
|
sizeof_namespace_label(ndd)); |
|
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, "free: %d\n", 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 = to_label(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); |
|
bitmap_free(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, 3 - i, 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, "free: %d\n", 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, "no more active labels\n"); |
|
} |
|
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, rc; |
|
|
|
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 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", 4) == 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, |
|
NSLABEL_FLAG_UPDATING); |
|
if (rc) |
|
return rc; |
|
} |
|
|
|
if (size == 0) |
|
return 0; |
|
|
|
/* Clear the UPDATING flag per UEFI 2.7 expectations */ |
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
|
|
rc = __pmem_label_update(nd_region, nd_mapping, nspm, i, 0); |
|
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); |
|
} |
|
|
|
int __init nd_label_init(void) |
|
{ |
|
WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); |
|
WARN_ON(guid_parse(NVDIMM_BTT2_GUID, &nvdimm_btt2_guid)); |
|
WARN_ON(guid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_guid)); |
|
WARN_ON(guid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_guid)); |
|
|
|
return 0; |
|
}
|
|
|