-#include <alloca.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <sys/types.h>
#include <unistd.h>
+#include <blkid.h>
#include <uuid/uuid.h>
-#include "ccan/crc/crc.h"
-
-#include "linux/bcache-ioctl.h"
+#include "bcachefs_ioctl.h"
+#include "linux/sort.h"
#include "tools-util.h"
#include "util.h"
+void die(const char *fmt, ...)
+{
+ va_list args;
+
+ va_start(args, fmt);
+ vfprintf(stderr, fmt, args);
+ va_end(args);
+ fputc('\n', stderr);
+
+ exit(EXIT_FAILURE);
+}
+
+char *mprintf(const char *fmt, ...)
+{
+ va_list args;
+ char *str;
+ int ret;
+
+ va_start(args, fmt);
+ ret = vasprintf(&str, fmt, args);
+ va_end(args);
+
+ if (ret < 0)
+ die("insufficient memory");
+
+ return str;
+}
+
+void *xcalloc(size_t count, size_t size)
+{
+ void *p = calloc(count, size);
+
+ if (!p)
+ die("insufficient memory");
+
+ return p;
+}
+
+void *xmalloc(size_t size)
+{
+ void *p = malloc(size);
+
+ if (!p)
+ die("insufficient memory");
+
+ memset(p, 0, size);
+ return p;
+}
+
+void xpread(int fd, void *buf, size_t count, off_t offset)
+{
+ ssize_t r = pread(fd, buf, count, offset);
+
+ if (r != count)
+ die("read error (ret %zi)", r);
+}
+
+void xpwrite(int fd, const void *buf, size_t count, off_t offset)
+{
+ ssize_t r = pwrite(fd, buf, count, offset);
+
+ if (r != count)
+ die("write error (ret %zi err %m)", r);
+}
+
+struct stat xfstatat(int dirfd, const char *path, int flags)
+{
+ struct stat stat;
+ if (fstatat(dirfd, path, &stat, flags))
+ die("stat error: %m");
+ return stat;
+}
+
+struct stat xfstat(int fd)
+{
+ struct stat stat;
+ if (fstat(fd, &stat))
+ die("stat error: %m");
+ return stat;
+}
+
/* Integer stuff: */
struct units_buf __pr_units(u64 v, enum units units)
char *read_file_str(int dirfd, const char *path)
{
- int fd = openat(dirfd, path, O_RDONLY);
-
- if (fd < 0)
- die("Unable to open %s\n", path);
+ int fd = xopenat(dirfd, path, O_RDONLY);
+ ssize_t len = xfstat(fd).st_size;
- struct stat statbuf;
- if (fstat(fd, &statbuf) < 0)
- die("fstat error\n");
+ char *buf = xmalloc(len + 1);
- char *buf = malloc(statbuf.st_size + 1);
-
- int len = read(fd, buf, statbuf.st_size);
+ len = read(fd, buf, len);
if (len < 0)
- die("read error while reading from file %s\n", path);
+ die("read error: %m");
buf[len] = '\0';
if (len && buf[len - 1] == '\n')
u64 read_file_u64(int dirfd, const char *path)
{
char *buf = read_file_str(dirfd, path);
- u64 ret = strtoll(buf, NULL, 10);
-
+ u64 v;
+ if (kstrtou64(buf, 10, &v))
+ die("read_file_u64: error parsing %s (got %s)", path, buf);
free(buf);
- return ret;
+ return v;
}
/* String list options: */
ssize_t read_string_list_or_die(const char *opt, const char * const list[],
const char *msg)
{
- ssize_t v = bch_read_string_list(opt, list);
+ ssize_t v = bch2_read_string_list(opt, list);
if (v < 0)
die("Bad %s %s", msg, opt);
/* Returns size of file or block device: */
u64 get_size(const char *path, int fd)
{
- struct stat statbuf;
- u64 ret;
-
- if (fstat(fd, &statbuf))
- die("Error statting %s: %s", path, strerror(errno));
+ struct stat statbuf = xfstat(fd);
if (!S_ISBLK(statbuf.st_mode))
return statbuf.st_size;
- if (ioctl(fd, BLKGETSIZE64, &ret))
- die("Error getting block device size on %s: %s\n",
- path, strerror(errno));
-
+ u64 ret;
+ xioctl(fd, BLKGETSIZE64, &ret);
return ret;
}
/* Returns blocksize in units of 512 byte sectors: */
unsigned get_blocksize(const char *path, int fd)
{
- struct stat statbuf;
- if (fstat(fd, &statbuf))
- die("Error statting %s: %s", path, strerror(errno));
+ struct stat statbuf = xfstat(fd);
if (!S_ISBLK(statbuf.st_mode))
return statbuf.st_blksize >> 9;
unsigned ret;
- if (ioctl(fd, BLKPBSZGET, &ret))
- die("Error getting blocksize on %s: %s\n",
- path, strerror(errno));
-
+ xioctl(fd, BLKPBSZGET, &ret);
return ret >> 9;
}
-/* Global control device: */
-int bcachectl_open(void)
+/* Open a block device, do magic blkid stuff to probe for existing filesystems: */
+int open_for_format(const char *dev, bool force)
{
- int fd = open("/dev/bcache-ctl", O_RDWR);
- if (fd < 0)
- die("Can't open bcache device: %s", strerror(errno));
+ blkid_probe pr;
+ const char *fs_type = NULL, *fs_label = NULL;
+ size_t fs_type_len, fs_label_len;
+
+ int fd = xopen(dev, O_RDWR|O_EXCL);
+
+ if (force)
+ return fd;
+
+ if (!(pr = blkid_new_probe()))
+ die("blkid error 1");
+ if (blkid_probe_set_device(pr, fd, 0, 0))
+ die("blkid error 2");
+ if (blkid_probe_enable_partitions(pr, true))
+ die("blkid error 3");
+ if (blkid_do_fullprobe(pr) < 0)
+ die("blkid error 4");
+
+ blkid_probe_lookup_value(pr, "TYPE", &fs_type, &fs_type_len);
+ blkid_probe_lookup_value(pr, "LABEL", &fs_label, &fs_label_len);
+
+ if (fs_type) {
+ if (fs_label)
+ printf("%s contains a %s filesystem labelled '%s'\n",
+ dev, fs_type, fs_label);
+ else
+ printf("%s contains a %s filesystem\n",
+ dev, fs_type);
+ fputs("Proceed anyway?", stdout);
+ if (!ask_yn())
+ exit(EXIT_FAILURE);
+ }
+ blkid_free_probe(pr);
return fd;
}
+/* Global control device: */
+int bcachectl_open(void)
+{
+ return xopen("/dev/bcachefs-ctl", O_RDWR);
+}
+
/* Filesystem handles (ioctl, sysfs dir): */
-#define SYSFS_BASE "/sys/fs/bcache/"
+#define SYSFS_BASE "/sys/fs/bcachefs/"
struct bcache_handle bcache_fs_open(const char *path)
{
if (!uuid_parse(path, tmp)) {
/* It's a UUID, look it up in sysfs: */
-
- char *sysfs = alloca(strlen(SYSFS_BASE) + strlen(path) + 1);
- sprintf(sysfs, "%s%s", SYSFS_BASE, path);
-
- ret.sysfs_fd = open(sysfs, O_RDONLY);
- if (!ret.sysfs_fd)
- die("Unable to open %s\n", path);
+ char *sysfs = mprintf("%s%s", SYSFS_BASE, path);
+ ret.sysfs_fd = xopen(sysfs, O_RDONLY);
char *minor = read_file_str(ret.sysfs_fd, "minor");
- char *ctl = alloca(20 + strlen(minor));
+ char *ctl = mprintf("/dev/bcachefs%s-ctl", minor);
+ ret.ioctl_fd = xopen(ctl, O_RDWR);
- sprintf(ctl, "/dev/bcache%s-ctl", minor);
+ free(sysfs);
free(minor);
-
- ret.ioctl_fd = open(ctl, O_RDWR);
- if (ret.ioctl_fd < 0)
- die("Error opening control device: %s\n",
- strerror(errno));
+ free(ctl);
} else {
/* It's a path: */
-
- ret.ioctl_fd = open(path, O_RDONLY);
- if (ret.ioctl_fd < 0)
- die("Error opening %s: %s\n",
- path, strerror(errno));
+ ret.ioctl_fd = xopen(path, O_RDONLY);
struct bch_ioctl_query_uuid uuid;
- if (ioctl(ret.ioctl_fd, BCH_IOCTL_QUERY_UUID, &uuid))
- die("ioctl error (not a bcache fs?): %s\n",
- strerror(errno));
+ xioctl(ret.ioctl_fd, BCH_IOCTL_QUERY_UUID, &uuid);
char uuid_str[40];
uuid_unparse(uuid.uuid.b, uuid_str);
- char *sysfs = alloca(strlen(SYSFS_BASE) + strlen(uuid_str) + 1);
- sprintf(sysfs, "%s%s", SYSFS_BASE, uuid_str);
-
- ret.sysfs_fd = open(sysfs, O_RDONLY);
- if (ret.sysfs_fd < 0)
- die("Unable to open sysfs dir %s: %s\n",
- sysfs, strerror(errno));
+ char *sysfs = mprintf("%s%s", SYSFS_BASE, uuid_str);
+ ret.sysfs_fd = xopen(sysfs, O_RDONLY);
+ free(sysfs);
}
return ret;
free(buf);
return ret;
}
+
+static int range_cmp(const void *_l, const void *_r)
+{
+ const struct range *l = _l, *r = _r;
+
+ if (l->start < r->start)
+ return -1;
+ if (l->start > r->start)
+ return 1;
+ return 0;
+}
+
+void ranges_sort_merge(ranges *r)
+{
+ struct range *t, *i;
+ ranges tmp = { NULL };
+
+ sort(&darray_item(*r, 0), darray_size(*r),
+ sizeof(darray_item(*r, 0)), range_cmp, NULL);
+
+ /* Merge contiguous ranges: */
+ darray_foreach(i, *r) {
+ t = tmp.size ? &tmp.item[tmp.size - 1] : NULL;
+
+ if (t && t->end >= i->start)
+ t->end = max(t->end, i->end);
+ else
+ darray_append(tmp, *i);
+ }
+
+ darray_free(*r);
+ *r = tmp;
+}
+
+void ranges_roundup(ranges *r, unsigned block_size)
+{
+ struct range *i;
+
+ darray_foreach(i, *r) {
+ i->start = round_down(i->start, block_size);
+ i->end = round_up(i->end, block_size);
+ }
+}
+
+void ranges_rounddown(ranges *r, unsigned block_size)
+{
+ struct range *i;
+
+ darray_foreach(i, *r) {
+ i->start = round_up(i->start, block_size);
+ i->end = round_down(i->end, block_size);
+ i->end = max(i->end, i->start);
+ }
+}
+
+struct fiemap_extent fiemap_iter_next(struct fiemap_iter *iter)
+{
+ struct fiemap_extent e;
+
+ BUG_ON(iter->idx > iter->f.fm_mapped_extents);
+
+ if (iter->idx == iter->f.fm_mapped_extents) {
+ xioctl(iter->fd, FS_IOC_FIEMAP, &iter->f);
+
+ if (!iter->f.fm_mapped_extents)
+ return (struct fiemap_extent) { .fe_length = 0 };
+
+ iter->idx = 0;
+ }
+
+ e = iter->f.fm_extents[iter->idx++];
+ BUG_ON(!e.fe_length);
+
+ iter->f.fm_start = e.fe_logical + e.fe_length;
+
+ return e;
+}
+
+const char *strcmp_prefix(const char *a, const char *a_prefix)
+{
+ while (*a_prefix && *a == *a_prefix) {
+ a++;
+ a_prefix++;
+ }
+ return *a_prefix ? NULL : a;
+}
+
+unsigned hatoi_validate(const char *s, const char *msg)
+{
+ u64 v;
+
+ if (bch2_strtoull_h(s, &v))
+ die("bad %s %s", msg, s);
+
+ if (v & (v - 1))
+ die("%s must be a power of two", msg);
+
+ v /= 512;
+
+ if (v > USHRT_MAX)
+ die("%s too large\n", msg);
+
+ if (!v)
+ die("%s too small\n", msg);
+
+ return v;
+}
+
+/* crc32c */
+
+static u32 crc32c_default(u32 crc, const void *buf, size_t size)
+{
+ static const u32 crc32c_tab[] = {
+ 0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4,
+ 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB,
+ 0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B,
+ 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24,
+ 0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B,
+ 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384,
+ 0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54,
+ 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B,
+ 0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A,
+ 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35,
+ 0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5,
+ 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA,
+ 0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45,
+ 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A,
+ 0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A,
+ 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595,
+ 0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48,
+ 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957,
+ 0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687,
+ 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198,
+ 0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927,
+ 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38,
+ 0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8,
+ 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7,
+ 0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096,
+ 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789,
+ 0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859,
+ 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46,
+ 0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9,
+ 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6,
+ 0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36,
+ 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829,
+ 0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C,
+ 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93,
+ 0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043,
+ 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C,
+ 0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3,
+ 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC,
+ 0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C,
+ 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033,
+ 0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652,
+ 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D,
+ 0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D,
+ 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982,
+ 0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D,
+ 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622,
+ 0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2,
+ 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED,
+ 0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530,
+ 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F,
+ 0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF,
+ 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0,
+ 0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F,
+ 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540,
+ 0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90,
+ 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F,
+ 0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE,
+ 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1,
+ 0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321,
+ 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E,
+ 0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81,
+ 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E,
+ 0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E,
+ 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351
+ };
+ const u8 *p = buf;
+
+ while (size--)
+ crc = crc32c_tab[(crc ^ *p++) & 0xFFL] ^ (crc >> 8);
+
+ return crc;
+}
+
+#include <linux/compiler.h>
+
+#ifdef __x86_64__
+
+#ifdef CONFIG_X86_64
+#define REX_PRE "0x48, "
+#else
+#define REX_PRE
+#endif
+
+static u32 crc32c_sse42(u32 crc, const void *buf, size_t size)
+{
+ while (size >= sizeof(long)) {
+ const unsigned long *d = buf;
+
+ __asm__ __volatile__(
+ ".byte 0xf2, " REX_PRE "0xf, 0x38, 0xf1, 0xf1;"
+ :"=S"(crc)
+ :"0"(crc), "c"(*d)
+ );
+ buf += sizeof(long);
+ size -= sizeof(long);
+ }
+
+ while (size) {
+ const u8 *d = buf;
+
+ __asm__ __volatile__(
+ ".byte 0xf2, 0xf, 0x38, 0xf0, 0xf1"
+ :"=S"(crc)
+ :"0"(crc), "c"(*d)
+ );
+ buf += 1;
+ size -= 1;
+ }
+
+ return crc;
+}
+
+static void *resolve_crc32c(void)
+{
+ __builtin_cpu_init();
+
+#ifdef __x86_64__
+ if (__builtin_cpu_supports("sse4.2"))
+ return crc32c_sse42;
+#endif
+ return crc32c_default;
+}
+
+/*
+ * ifunc is buggy and I don't know what breaks it (LTO?)
+ */
+#ifdef HAVE_WORKING_IFUNC
+
+u32 crc32c(u32, const void *, size_t)
+ __attribute__((ifunc("resolve_crc32c")));
+
+#else
+
+u32 crc32c(u32 crc, const void *buf, size_t size)
+{
+ static u32 (*real_crc32c)(u32, const void *, size_t);
+
+ if (unlikely(!real_crc32c))
+ real_crc32c = resolve_crc32c();
+
+ return real_crc32c(crc, buf, size);
+}
+
+#endif /* HAVE_WORKING_IFUNC */
+
+#endif
projects / bcachefs-tools-debian / blobdiff