diff options
Diffstat (limited to 'qemu/dump.c')
| -rw-r--r-- | qemu/dump.c | 350 |
1 files changed, 242 insertions, 108 deletions
diff --git a/qemu/dump.c b/qemu/dump.c index 78b7d843c..9726f1f47 100644 --- a/qemu/dump.c +++ b/qemu/dump.c @@ -11,7 +11,8 @@ * */ -#include "qemu-common.h" +#include "qemu/osdep.h" +#include "qemu/cutils.h" #include "elf.h" #include "cpu.h" #include "exec/cpu-all.h" @@ -22,9 +23,9 @@ #include "sysemu/sysemu.h" #include "sysemu/memory_mapping.h" #include "sysemu/cpus.h" -#include "qapi/error.h" #include "qapi/qmp/qerror.h" #include "qmp-commands.h" +#include "qapi-event.h" #include <zlib.h> #ifdef CONFIG_LZO @@ -82,12 +83,6 @@ static int dump_cleanup(DumpState *s) return 0; } -static void dump_error(DumpState *s, const char *reason, Error **errp) -{ - dump_cleanup(s); - error_setg(errp, "%s", reason); -} - static int fd_write_vmcore(const void *buf, size_t size, void *opaque) { DumpState *s = opaque; @@ -128,7 +123,7 @@ static void write_elf64_header(DumpState *s, Error **errp) ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); if (ret < 0) { - dump_error(s, "dump: failed to write elf header", errp); + error_setg(errp, "dump: failed to write elf header"); } } @@ -159,7 +154,7 @@ static void write_elf32_header(DumpState *s, Error **errp) ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); if (ret < 0) { - dump_error(s, "dump: failed to write elf header", errp); + error_setg(errp, "dump: failed to write elf header"); } } @@ -182,7 +177,7 @@ static void write_elf64_load(DumpState *s, MemoryMapping *memory_mapping, ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); if (ret < 0) { - dump_error(s, "dump: failed to write program header table", errp); + error_setg(errp, "dump: failed to write program header table"); } } @@ -205,7 +200,7 @@ static void write_elf32_load(DumpState *s, MemoryMapping *memory_mapping, ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); if (ret < 0) { - dump_error(s, "dump: failed to write program header table", errp); + error_setg(errp, "dump: failed to write program header table"); } } @@ -225,7 +220,7 @@ static void write_elf64_note(DumpState *s, Error **errp) ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); if (ret < 0) { - dump_error(s, "dump: failed to write program header table", errp); + error_setg(errp, "dump: failed to write program header table"); } } @@ -245,7 +240,7 @@ static void write_elf64_notes(WriteCoreDumpFunction f, DumpState *s, id = cpu_index(cpu); ret = cpu_write_elf64_note(f, cpu, id, s); if (ret < 0) { - dump_error(s, "dump: failed to write elf notes", errp); + error_setg(errp, "dump: failed to write elf notes"); return; } } @@ -253,7 +248,7 @@ static void write_elf64_notes(WriteCoreDumpFunction f, DumpState *s, CPU_FOREACH(cpu) { ret = cpu_write_elf64_qemunote(f, cpu, s); if (ret < 0) { - dump_error(s, "dump: failed to write CPU status", errp); + error_setg(errp, "dump: failed to write CPU status"); return; } } @@ -275,7 +270,7 @@ static void write_elf32_note(DumpState *s, Error **errp) ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); if (ret < 0) { - dump_error(s, "dump: failed to write program header table", errp); + error_setg(errp, "dump: failed to write program header table"); } } @@ -290,7 +285,7 @@ static void write_elf32_notes(WriteCoreDumpFunction f, DumpState *s, id = cpu_index(cpu); ret = cpu_write_elf32_note(f, cpu, id, s); if (ret < 0) { - dump_error(s, "dump: failed to write elf notes", errp); + error_setg(errp, "dump: failed to write elf notes"); return; } } @@ -298,7 +293,7 @@ static void write_elf32_notes(WriteCoreDumpFunction f, DumpState *s, CPU_FOREACH(cpu) { ret = cpu_write_elf32_qemunote(f, cpu, s); if (ret < 0) { - dump_error(s, "dump: failed to write CPU status", errp); + error_setg(errp, "dump: failed to write CPU status"); return; } } @@ -326,7 +321,7 @@ static void write_elf_section(DumpState *s, int type, Error **errp) ret = fd_write_vmcore(&shdr, shdr_size, s); if (ret < 0) { - dump_error(s, "dump: failed to write section header table", errp); + error_setg(errp, "dump: failed to write section header table"); } } @@ -336,7 +331,9 @@ static void write_data(DumpState *s, void *buf, int length, Error **errp) ret = fd_write_vmcore(buf, length, s); if (ret < 0) { - dump_error(s, "dump: failed to save memory", errp); + error_setg(errp, "dump: failed to save memory"); + } else { + s->written_size += length; } } @@ -347,18 +344,18 @@ static void write_memory(DumpState *s, GuestPhysBlock *block, ram_addr_t start, int64_t i; Error *local_err = NULL; - for (i = 0; i < size / TARGET_PAGE_SIZE; i++) { - write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE, - TARGET_PAGE_SIZE, &local_err); + for (i = 0; i < size / s->dump_info.page_size; i++) { + write_data(s, block->host_addr + start + i * s->dump_info.page_size, + s->dump_info.page_size, &local_err); if (local_err) { error_propagate(errp, local_err); return; } } - if ((size % TARGET_PAGE_SIZE) != 0) { - write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE, - size % TARGET_PAGE_SIZE, &local_err); + if ((size % s->dump_info.page_size) != 0) { + write_data(s, block->host_addr + start + i * s->dump_info.page_size, + size % s->dump_info.page_size, &local_err); if (local_err) { error_propagate(errp, local_err); return; @@ -568,11 +565,6 @@ static void dump_begin(DumpState *s, Error **errp) } } -static void dump_completed(DumpState *s) -{ - dump_cleanup(s); -} - static int get_next_block(DumpState *s, GuestPhysBlock *block) { while (1) { @@ -624,8 +616,6 @@ static void dump_iterate(DumpState *s, Error **errp) } } while (!get_next_block(s, block)); - - dump_completed(s); } static void create_vmcore(DumpState *s, Error **errp) @@ -737,7 +727,7 @@ static void create_header32(DumpState *s, Error **errp) strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE)); dh->header_version = cpu_to_dump32(s, 6); - block_size = TARGET_PAGE_SIZE; + block_size = s->dump_info.page_size; dh->block_size = cpu_to_dump32(s, block_size); sub_hdr_size = sizeof(struct KdumpSubHeader32) + s->note_size; sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size); @@ -765,7 +755,7 @@ static void create_header32(DumpState *s, Error **errp) dh->status = cpu_to_dump32(s, status); if (write_buffer(s->fd, 0, dh, size) < 0) { - dump_error(s, "dump: failed to write disk dump header", errp); + error_setg(errp, "dump: failed to write disk dump header"); goto out; } @@ -775,7 +765,7 @@ static void create_header32(DumpState *s, Error **errp) /* 64bit max_mapnr_64 */ kh->max_mapnr_64 = cpu_to_dump64(s, s->max_mapnr); - kh->phys_base = cpu_to_dump32(s, PHYS_BASE); + kh->phys_base = cpu_to_dump32(s, s->dump_info.phys_base); kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL); offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size; @@ -784,7 +774,7 @@ static void create_header32(DumpState *s, Error **errp) if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS * block_size, kh, size) < 0) { - dump_error(s, "dump: failed to write kdump sub header", errp); + error_setg(errp, "dump: failed to write kdump sub header"); goto out; } @@ -800,7 +790,7 @@ static void create_header32(DumpState *s, Error **errp) } if (write_buffer(s->fd, offset_note, s->note_buf, s->note_size) < 0) { - dump_error(s, "dump: failed to write notes", errp); + error_setg(errp, "dump: failed to write notes"); goto out; } @@ -837,7 +827,7 @@ static void create_header64(DumpState *s, Error **errp) strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE)); dh->header_version = cpu_to_dump32(s, 6); - block_size = TARGET_PAGE_SIZE; + block_size = s->dump_info.page_size; dh->block_size = cpu_to_dump32(s, block_size); sub_hdr_size = sizeof(struct KdumpSubHeader64) + s->note_size; sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size); @@ -865,7 +855,7 @@ static void create_header64(DumpState *s, Error **errp) dh->status = cpu_to_dump32(s, status); if (write_buffer(s->fd, 0, dh, size) < 0) { - dump_error(s, "dump: failed to write disk dump header", errp); + error_setg(errp, "dump: failed to write disk dump header"); goto out; } @@ -875,7 +865,7 @@ static void create_header64(DumpState *s, Error **errp) /* 64bit max_mapnr_64 */ kh->max_mapnr_64 = cpu_to_dump64(s, s->max_mapnr); - kh->phys_base = cpu_to_dump64(s, PHYS_BASE); + kh->phys_base = cpu_to_dump64(s, s->dump_info.phys_base); kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL); offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size; @@ -884,7 +874,7 @@ static void create_header64(DumpState *s, Error **errp) if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS * block_size, kh, size) < 0) { - dump_error(s, "dump: failed to write kdump sub header", errp); + error_setg(errp, "dump: failed to write kdump sub header"); goto out; } @@ -901,7 +891,7 @@ static void create_header64(DumpState *s, Error **errp) if (write_buffer(s->fd, offset_note, s->note_buf, s->note_size) < 0) { - dump_error(s, "dump: failed to write notes", errp); + error_setg(errp, "dump: failed to write notes"); goto out; } @@ -933,6 +923,11 @@ static void write_dump_header(DumpState *s, Error **errp) } } +static size_t dump_bitmap_get_bufsize(DumpState *s) +{ + return s->dump_info.page_size; +} + /* * set dump_bitmap sequencely. the bit before last_pfn is not allowed to be * rewritten, so if need to set the first bit, set last_pfn and pfn to 0. @@ -946,6 +941,8 @@ static int set_dump_bitmap(uint64_t last_pfn, uint64_t pfn, bool value, off_t old_offset, new_offset; off_t offset_bitmap1, offset_bitmap2; uint32_t byte, bit; + size_t bitmap_bufsize = dump_bitmap_get_bufsize(s); + size_t bits_per_buf = bitmap_bufsize * CHAR_BIT; /* should not set the previous place */ assert(last_pfn <= pfn); @@ -956,14 +953,14 @@ static int set_dump_bitmap(uint64_t last_pfn, uint64_t pfn, bool value, * making new_offset be bigger than old_offset can also sync remained data * into vmcore. */ - old_offset = BUFSIZE_BITMAP * (last_pfn / PFN_BUFBITMAP); - new_offset = BUFSIZE_BITMAP * (pfn / PFN_BUFBITMAP); + old_offset = bitmap_bufsize * (last_pfn / bits_per_buf); + new_offset = bitmap_bufsize * (pfn / bits_per_buf); while (old_offset < new_offset) { /* calculate the offset and write dump_bitmap */ offset_bitmap1 = s->offset_dump_bitmap + old_offset; if (write_buffer(s->fd, offset_bitmap1, buf, - BUFSIZE_BITMAP) < 0) { + bitmap_bufsize) < 0) { return -1; } @@ -971,17 +968,17 @@ static int set_dump_bitmap(uint64_t last_pfn, uint64_t pfn, bool value, offset_bitmap2 = s->offset_dump_bitmap + s->len_dump_bitmap + old_offset; if (write_buffer(s->fd, offset_bitmap2, buf, - BUFSIZE_BITMAP) < 0) { + bitmap_bufsize) < 0) { return -1; } - memset(buf, 0, BUFSIZE_BITMAP); - old_offset += BUFSIZE_BITMAP; + memset(buf, 0, bitmap_bufsize); + old_offset += bitmap_bufsize; } /* get the exact place of the bit in the buf, and set it */ - byte = (pfn % PFN_BUFBITMAP) / CHAR_BIT; - bit = (pfn % PFN_BUFBITMAP) % CHAR_BIT; + byte = (pfn % bits_per_buf) / CHAR_BIT; + bit = (pfn % bits_per_buf) % CHAR_BIT; if (value) { buf[byte] |= 1u << bit; } else { @@ -991,6 +988,20 @@ static int set_dump_bitmap(uint64_t last_pfn, uint64_t pfn, bool value, return 0; } +static uint64_t dump_paddr_to_pfn(DumpState *s, uint64_t addr) +{ + int target_page_shift = ctz32(s->dump_info.page_size); + + return (addr >> target_page_shift) - ARCH_PFN_OFFSET; +} + +static uint64_t dump_pfn_to_paddr(DumpState *s, uint64_t pfn) +{ + int target_page_shift = ctz32(s->dump_info.page_size); + + return (pfn + ARCH_PFN_OFFSET) << target_page_shift; +} + /* * exam every page and return the page frame number and the address of the page. * bufptr can be NULL. note: the blocks here is supposed to reflect guest-phys @@ -1001,16 +1012,16 @@ static bool get_next_page(GuestPhysBlock **blockptr, uint64_t *pfnptr, uint8_t **bufptr, DumpState *s) { GuestPhysBlock *block = *blockptr; - hwaddr addr; + hwaddr addr, target_page_mask = ~((hwaddr)s->dump_info.page_size - 1); uint8_t *buf; /* block == NULL means the start of the iteration */ if (!block) { block = QTAILQ_FIRST(&s->guest_phys_blocks.head); *blockptr = block; - assert((block->target_start & ~TARGET_PAGE_MASK) == 0); - assert((block->target_end & ~TARGET_PAGE_MASK) == 0); - *pfnptr = paddr_to_pfn(block->target_start); + assert((block->target_start & ~target_page_mask) == 0); + assert((block->target_end & ~target_page_mask) == 0); + *pfnptr = dump_paddr_to_pfn(s, block->target_start); if (bufptr) { *bufptr = block->host_addr; } @@ -1018,10 +1029,10 @@ static bool get_next_page(GuestPhysBlock **blockptr, uint64_t *pfnptr, } *pfnptr = *pfnptr + 1; - addr = pfn_to_paddr(*pfnptr); + addr = dump_pfn_to_paddr(s, *pfnptr); if ((addr >= block->target_start) && - (addr + TARGET_PAGE_SIZE <= block->target_end)) { + (addr + s->dump_info.page_size <= block->target_end)) { buf = block->host_addr + (addr - block->target_start); } else { /* the next page is in the next block */ @@ -1030,9 +1041,9 @@ static bool get_next_page(GuestPhysBlock **blockptr, uint64_t *pfnptr, if (!block) { return false; } - assert((block->target_start & ~TARGET_PAGE_MASK) == 0); - assert((block->target_end & ~TARGET_PAGE_MASK) == 0); - *pfnptr = paddr_to_pfn(block->target_start); + assert((block->target_start & ~target_page_mask) == 0); + assert((block->target_end & ~target_page_mask) == 0); + *pfnptr = dump_paddr_to_pfn(s, block->target_start); buf = block->host_addr; } @@ -1050,9 +1061,11 @@ static void write_dump_bitmap(DumpState *s, Error **errp) void *dump_bitmap_buf; size_t num_dumpable; GuestPhysBlock *block_iter = NULL; + size_t bitmap_bufsize = dump_bitmap_get_bufsize(s); + size_t bits_per_buf = bitmap_bufsize * CHAR_BIT; /* dump_bitmap_buf is used to store dump_bitmap temporarily */ - dump_bitmap_buf = g_malloc0(BUFSIZE_BITMAP); + dump_bitmap_buf = g_malloc0(bitmap_bufsize); num_dumpable = 0; last_pfn = 0; @@ -1064,7 +1077,7 @@ static void write_dump_bitmap(DumpState *s, Error **errp) while (get_next_page(&block_iter, &pfn, NULL, s)) { ret = set_dump_bitmap(last_pfn, pfn, true, dump_bitmap_buf, s); if (ret < 0) { - dump_error(s, "dump: failed to set dump_bitmap", errp); + error_setg(errp, "dump: failed to set dump_bitmap"); goto out; } @@ -1074,14 +1087,14 @@ static void write_dump_bitmap(DumpState *s, Error **errp) /* * set_dump_bitmap will always leave the recently set bit un-sync. Here we - * set last_pfn + PFN_BUFBITMAP to 0 and those set but un-sync bit will be - * synchronized into vmcore. + * set the remaining bits from last_pfn to the end of the bitmap buffer to + * 0. With those set, the un-sync bit will be synchronized into the vmcore. */ if (num_dumpable > 0) { - ret = set_dump_bitmap(last_pfn, last_pfn + PFN_BUFBITMAP, false, + ret = set_dump_bitmap(last_pfn, last_pfn + bits_per_buf, false, dump_bitmap_buf, s); if (ret < 0) { - dump_error(s, "dump: failed to sync dump_bitmap", errp); + error_setg(errp, "dump: failed to sync dump_bitmap"); goto out; } } @@ -1098,8 +1111,8 @@ static void prepare_data_cache(DataCache *data_cache, DumpState *s, { data_cache->fd = s->fd; data_cache->data_size = 0; - data_cache->buf_size = BUFSIZE_DATA_CACHE; - data_cache->buf = g_malloc0(BUFSIZE_DATA_CACHE); + data_cache->buf_size = 4 * dump_bitmap_get_bufsize(s); + data_cache->buf = g_malloc0(data_cache->buf_size); data_cache->offset = offset; } @@ -1193,7 +1206,7 @@ static void write_dump_pages(DumpState *s, Error **errp) prepare_data_cache(&page_data, s, offset_data); /* prepare buffer to store compressed data */ - len_buf_out = get_len_buf_out(TARGET_PAGE_SIZE, s->flag_compress); + len_buf_out = get_len_buf_out(s->dump_info.page_size, s->flag_compress); assert(len_buf_out != 0); #ifdef CONFIG_LZO @@ -1206,19 +1219,19 @@ static void write_dump_pages(DumpState *s, Error **errp) * init zero page's page_desc and page_data, because every zero page * uses the same page_data */ - pd_zero.size = cpu_to_dump32(s, TARGET_PAGE_SIZE); + pd_zero.size = cpu_to_dump32(s, s->dump_info.page_size); pd_zero.flags = cpu_to_dump32(s, 0); pd_zero.offset = cpu_to_dump64(s, offset_data); pd_zero.page_flags = cpu_to_dump64(s, 0); - buf = g_malloc0(TARGET_PAGE_SIZE); - ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false); + buf = g_malloc0(s->dump_info.page_size); + ret = write_cache(&page_data, buf, s->dump_info.page_size, false); g_free(buf); if (ret < 0) { - dump_error(s, "dump: failed to write page data (zero page)", errp); + error_setg(errp, "dump: failed to write page data (zero page)"); goto out; } - offset_data += TARGET_PAGE_SIZE; + offset_data += s->dump_info.page_size; /* * dump memory to vmcore page by page. zero page will all be resided in the @@ -1226,11 +1239,11 @@ static void write_dump_pages(DumpState *s, Error **errp) */ while (get_next_page(&block_iter, &pfn_iter, &buf, s)) { /* check zero page */ - if (is_zero_page(buf, TARGET_PAGE_SIZE)) { + if (is_zero_page(buf, s->dump_info.page_size)) { ret = write_cache(&page_desc, &pd_zero, sizeof(PageDescriptor), false); if (ret < 0) { - dump_error(s, "dump: failed to write page desc", errp); + error_setg(errp, "dump: failed to write page desc"); goto out; } } else { @@ -1248,56 +1261,57 @@ static void write_dump_pages(DumpState *s, Error **errp) size_out = len_buf_out; if ((s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) && (compress2(buf_out, (uLongf *)&size_out, buf, - TARGET_PAGE_SIZE, Z_BEST_SPEED) == Z_OK) && - (size_out < TARGET_PAGE_SIZE)) { + s->dump_info.page_size, Z_BEST_SPEED) == Z_OK) && + (size_out < s->dump_info.page_size)) { pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_ZLIB); pd.size = cpu_to_dump32(s, size_out); ret = write_cache(&page_data, buf_out, size_out, false); if (ret < 0) { - dump_error(s, "dump: failed to write page data", errp); + error_setg(errp, "dump: failed to write page data"); goto out; } #ifdef CONFIG_LZO } else if ((s->flag_compress & DUMP_DH_COMPRESSED_LZO) && - (lzo1x_1_compress(buf, TARGET_PAGE_SIZE, buf_out, + (lzo1x_1_compress(buf, s->dump_info.page_size, buf_out, (lzo_uint *)&size_out, wrkmem) == LZO_E_OK) && - (size_out < TARGET_PAGE_SIZE)) { + (size_out < s->dump_info.page_size)) { pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_LZO); pd.size = cpu_to_dump32(s, size_out); ret = write_cache(&page_data, buf_out, size_out, false); if (ret < 0) { - dump_error(s, "dump: failed to write page data", errp); + error_setg(errp, "dump: failed to write page data"); goto out; } #endif #ifdef CONFIG_SNAPPY } else if ((s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) && - (snappy_compress((char *)buf, TARGET_PAGE_SIZE, + (snappy_compress((char *)buf, s->dump_info.page_size, (char *)buf_out, &size_out) == SNAPPY_OK) && - (size_out < TARGET_PAGE_SIZE)) { + (size_out < s->dump_info.page_size)) { pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_SNAPPY); pd.size = cpu_to_dump32(s, size_out); ret = write_cache(&page_data, buf_out, size_out, false); if (ret < 0) { - dump_error(s, "dump: failed to write page data", errp); + error_setg(errp, "dump: failed to write page data"); goto out; } #endif } else { /* * fall back to save in plaintext, size_out should be - * assigned TARGET_PAGE_SIZE + * assigned the target's page size */ pd.flags = cpu_to_dump32(s, 0); - size_out = TARGET_PAGE_SIZE; + size_out = s->dump_info.page_size; pd.size = cpu_to_dump32(s, size_out); - ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false); + ret = write_cache(&page_data, buf, + s->dump_info.page_size, false); if (ret < 0) { - dump_error(s, "dump: failed to write page data", errp); + error_setg(errp, "dump: failed to write page data"); goto out; } } @@ -1309,20 +1323,21 @@ static void write_dump_pages(DumpState *s, Error **errp) ret = write_cache(&page_desc, &pd, sizeof(PageDescriptor), false); if (ret < 0) { - dump_error(s, "dump: failed to write page desc", errp); + error_setg(errp, "dump: failed to write page desc"); goto out; } } + s->written_size += s->dump_info.page_size; } ret = write_cache(&page_desc, NULL, 0, true); if (ret < 0) { - dump_error(s, "dump: failed to sync cache for page_desc", errp); + error_setg(errp, "dump: failed to sync cache for page_desc"); goto out; } ret = write_cache(&page_data, NULL, 0, true); if (ret < 0) { - dump_error(s, "dump: failed to sync cache for page_data", errp); + error_setg(errp, "dump: failed to sync cache for page_data"); goto out; } @@ -1366,7 +1381,7 @@ static void create_kdump_vmcore(DumpState *s, Error **errp) ret = write_start_flat_header(s->fd); if (ret < 0) { - dump_error(s, "dump: failed to write start flat header", errp); + error_setg(errp, "dump: failed to write start flat header"); return; } @@ -1390,11 +1405,9 @@ static void create_kdump_vmcore(DumpState *s, Error **errp) ret = write_end_flat_header(s->fd); if (ret < 0) { - dump_error(s, "dump: failed to write end flat header", errp); + error_setg(errp, "dump: failed to write end flat header"); return; } - - dump_completed(s); } static ram_addr_t get_start_block(DumpState *s) @@ -1430,7 +1443,45 @@ static void get_max_mapnr(DumpState *s) GuestPhysBlock *last_block; last_block = QTAILQ_LAST(&s->guest_phys_blocks.head, GuestPhysBlockHead); - s->max_mapnr = paddr_to_pfn(last_block->target_end); + s->max_mapnr = dump_paddr_to_pfn(s, last_block->target_end); +} + +static DumpState dump_state_global = { .status = DUMP_STATUS_NONE }; + +static void dump_state_prepare(DumpState *s) +{ + /* zero the struct, setting status to active */ + *s = (DumpState) { .status = DUMP_STATUS_ACTIVE }; +} + +bool dump_in_progress(void) +{ + DumpState *state = &dump_state_global; + return (atomic_read(&state->status) == DUMP_STATUS_ACTIVE); +} + +/* calculate total size of memory to be dumped (taking filter into + * acoount.) */ +static int64_t dump_calculate_size(DumpState *s) +{ + GuestPhysBlock *block; + int64_t size = 0, total = 0, left = 0, right = 0; + + QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) { + if (s->has_filter) { + /* calculate the overlapped region. */ + left = MAX(s->begin, block->target_start); + right = MIN(s->begin + s->length, block->target_end); + size = right - left; + size = size > 0 ? size : 0; + } else { + /* count the whole region in */ + size = (block->target_end - block->target_start); + } + total += size; + } + + return total; } static void dump_init(DumpState *s, int fd, bool has_format, @@ -1442,6 +1493,10 @@ static void dump_init(DumpState *s, int fd, bool has_format, Error *err = NULL; int ret; + s->has_format = has_format; + s->format = format; + s->written_size = 0; + /* kdump-compressed is conflict with paging and filter */ if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { assert(!paging && !has_filter); @@ -1472,6 +1527,10 @@ static void dump_init(DumpState *s, int fd, bool has_format, guest_phys_blocks_init(&s->guest_phys_blocks); guest_phys_blocks_append(&s->guest_phys_blocks); + s->total_size = dump_calculate_size(s); +#ifdef DEBUG_DUMP_GUEST_MEMORY + fprintf(stderr, "DUMP: total memory to dump: %lu\n", s->total_size); +#endif s->start = get_start_block(s); if (s->start == -1) { @@ -1489,6 +1548,10 @@ static void dump_init(DumpState *s, int fd, bool has_format, goto cleanup; } + if (!s->dump_info.page_size) { + s->dump_info.page_size = TARGET_PAGE_SIZE; + } + s->note_size = cpu_get_note_size(s->dump_info.d_class, s->dump_info.d_machine, nr_cpus); if (s->note_size < 0) { @@ -1512,8 +1575,9 @@ static void dump_init(DumpState *s, int fd, bool has_format, get_max_mapnr(s); uint64_t tmp; - tmp = DIV_ROUND_UP(DIV_ROUND_UP(s->max_mapnr, CHAR_BIT), TARGET_PAGE_SIZE); - s->len_dump_bitmap = tmp * TARGET_PAGE_SIZE; + tmp = DIV_ROUND_UP(DIV_ROUND_UP(s->max_mapnr, CHAR_BIT), + s->dump_info.page_size); + s->len_dump_bitmap = tmp * s->dump_info.page_size; /* init for kdump-compressed format */ if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { @@ -1595,8 +1659,60 @@ cleanup: dump_cleanup(s); } -void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin, - int64_t begin, bool has_length, +/* this operation might be time consuming. */ +static void dump_process(DumpState *s, Error **errp) +{ + Error *local_err = NULL; + DumpQueryResult *result = NULL; + + if (s->has_format && s->format != DUMP_GUEST_MEMORY_FORMAT_ELF) { + create_kdump_vmcore(s, &local_err); + } else { + create_vmcore(s, &local_err); + } + + /* make sure status is written after written_size updates */ + smp_wmb(); + atomic_set(&s->status, + (local_err ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED)); + + /* send DUMP_COMPLETED message (unconditionally) */ + result = qmp_query_dump(NULL); + /* should never fail */ + assert(result); + qapi_event_send_dump_completed(result, !!local_err, (local_err ? \ + error_get_pretty(local_err) : NULL), + &error_abort); + qapi_free_DumpQueryResult(result); + + error_propagate(errp, local_err); + dump_cleanup(s); +} + +static void *dump_thread(void *data) +{ + Error *err = NULL; + DumpState *s = (DumpState *)data; + dump_process(s, &err); + error_free(err); + return NULL; +} + +DumpQueryResult *qmp_query_dump(Error **errp) +{ + DumpQueryResult *result = g_new(DumpQueryResult, 1); + DumpState *state = &dump_state_global; + result->status = atomic_read(&state->status); + /* make sure we are reading status and written_size in order */ + smp_rmb(); + result->completed = state->written_size; + result->total = state->total_size; + return result; +} + +void qmp_dump_guest_memory(bool paging, const char *file, + bool has_detach, bool detach, + bool has_begin, int64_t begin, bool has_length, int64_t length, bool has_format, DumpGuestMemoryFormat format, Error **errp) { @@ -1604,6 +1720,19 @@ void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin, int fd = -1; DumpState *s; Error *local_err = NULL; + bool detach_p = false; + + if (runstate_check(RUN_STATE_INMIGRATE)) { + error_setg(errp, "Dump not allowed during incoming migration."); + return; + } + + /* if there is a dump in background, we should wait until the dump + * finished */ + if (dump_in_progress()) { + error_setg(errp, "There is a dump in process, please wait."); + return; + } /* * kdump-compressed format need the whole memory dumped, so paging or @@ -1623,6 +1752,9 @@ void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin, error_setg(errp, QERR_MISSING_PARAMETER, "begin"); return; } + if (has_detach) { + detach_p = detach; + } /* check whether lzo/snappy is supported */ #ifndef CONFIG_LZO @@ -1661,23 +1793,25 @@ void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin, return; } - s = g_malloc0(sizeof(DumpState)); + s = &dump_state_global; + dump_state_prepare(s); dump_init(s, fd, has_format, format, paging, has_begin, begin, length, &local_err); if (local_err) { - g_free(s); error_propagate(errp, local_err); + atomic_set(&s->status, DUMP_STATUS_FAILED); return; } - if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { - create_kdump_vmcore(s, errp); + if (detach_p) { + /* detached dump */ + qemu_thread_create(&s->dump_thread, "dump_thread", dump_thread, + s, QEMU_THREAD_DETACHED); } else { - create_vmcore(s, errp); + /* sync dump */ + dump_process(s, errp); } - - g_free(s); } DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp) |