#include <unistd.h>
int main(void) {
- fputs("This program is only supported on Linux!\n", stderr);
- exit(EXIT_FAILURE);
+ fputs("This program is only supported on Linux!\n", stderr);
+ exit(EXIT_FAILURE);
}
#else
#define _LARGEFILE64_SOURCE
#include <ext2fs/fiemap.h>
int verbose = 0;
-int no_bs = 0; /* Don't use the files blocksize, use 1K blocksize */
+int blocksize; /* Use specified blocksize (default 1kB) */
int sync_file = 0; /* fsync file before getting the mapping */
int xattr_map = 0; /* get xattr mapping */
-int force_bmap = 0;
-int logical_width = 12;
-int physical_width = 14;
-unsigned long long filesize;
+int force_bmap; /* force use of FIBMAP instead of FIEMAP */
+int force_extent; /* print output in extent format always */
+int device_offset; /* extents report device-relative offsets */
+int logical_width = 8;
+int physical_width = 10;
+char *ext_fmt = "%4d: %*llu..%*llu: %*llu..%*llu: %6llu: %s\n";
+char *hex_fmt = "%4d: %*llx..%*llx: %*llx..%*llx: %6llx: %s\n";
-#define FILEFRAG_FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)
+#define FILEFRAG_FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR |\
+ FIEMAP_FLAG_DEVICE_ORDER)
#define FIBMAP _IO(0x00, 1) /* bmap access */
#define FIGETBSZ _IO(0x00, 2) /* get the block size used for bmap */
+#define LUSTRE_SUPER_MAGIC 0x0BD00BD0
+
#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */
#define EXT3_IOC_GETFLAGS _IOR('f', 1, long)
+#ifdef HAVE_FSTAT64
+#define mystat stat64
+#else
+#define mystat stat
+#endif
+
static int int_log2(int arg)
{
int l = 0;
if (errno == EPERM) {
fprintf(stderr, "No permission to use FIBMAP ioctl; "
"must have root privileges\n");
- exit(1);
}
- perror("FIBMAP");
}
*phy_blk = b;
return ret;
}
+static void print_extent_header(void)
+{
+ printf(" ext: %*s %*s length: %sflags:\n",
+ logical_width * 2 + 3,
+ device_offset ? "device_logical:" : "logical_offset:",
+ physical_width * 2 + 3, "physical_offset:",
+ device_offset ? " dev: " : "");
+}
+
static void print_extent_info(struct fiemap_extent *fm_extent, int cur_ex,
- unsigned long long expected, int blk_shift)
+ int blk_shift, struct mystat *fileinfo)
{
- __u64 phy_blk;
+ unsigned long long physical_blk;
unsigned long long logical_blk;
- unsigned long ext_len;
+ unsigned long long ext_blks, ext_len;
char flags[256] = "";
- /* For inline data all offsets should be in terms of bytes, not blocks */
+ /* For inline data all offsets should be in bytes, not blocks */
if (fm_extent->fe_flags & FIEMAP_EXTENT_DATA_INLINE)
blk_shift = 0;
ext_len = fm_extent->fe_length >> blk_shift;
+ ext_blks = (fm_extent->fe_length - 1) >> blk_shift;
logical_blk = fm_extent->fe_logical >> blk_shift;
- phy_blk = fm_extent->fe_physical >> blk_shift;
+ physical_blk = fm_extent->fe_physical >> blk_shift;
+
+ if (device_offset)
+ sprintf(flags, "%04x: ", fm_extent->fe_device);
if (fm_extent->fe_flags & FIEMAP_EXTENT_UNKNOWN)
strcat(flags, "unknown,");
strcat(flags, "unwritten,");
if (fm_extent->fe_flags & FIEMAP_EXTENT_MERGED)
strcat(flags, "merged,");
+ if (fm_extent->fe_flags & FIEMAP_EXTENT_NET)
+ strcat(flags, "network,");
+ if (fm_extent->fe_flags & FIEMAP_EXTENT_NO_DIRECT)
+ strcat(flags, "no_direct,");
- if (fm_extent->fe_logical + fm_extent->fe_length >= filesize)
+ if (fm_extent->fe_logical + fm_extent->fe_length >= fileinfo->st_size)
strcat(flags, "eof,");
/* Remove trailing comma, if any */
if (flags[0])
flags[strlen(flags) - 1] = '\0';
- if (expected)
- printf("%4d %*llu %*llu %*llu %6lu %s\n",
- cur_ex, logical_width, logical_blk,
- physical_width, phy_blk, physical_width, expected,
- ext_len, flags);
- else
- printf("%4d %*llu %*llu %*s %6lu %s\n",
- cur_ex, logical_width, logical_blk,
- physical_width, phy_blk, physical_width, "",
- ext_len, flags);
+ printf(ext_fmt, cur_ex, logical_width, logical_blk,
+ logical_width, logical_blk + ext_blks,
+ physical_width, physical_blk,
+ physical_width, physical_blk + ext_blks,
+ ext_len, flags);
}
-static int filefrag_fiemap(int fd, int blk_shift, int *num_extents)
+static int filefrag_fiemap(int fd, int blk_shift, int *num_extents,
+ struct mystat *fileinfo)
{
char buf[4096] = "";
struct fiemap *fiemap = (struct fiemap *)buf;
struct fiemap_extent *fm_ext = &fiemap->fm_extents[0];
int count = (sizeof(buf) - sizeof(*fiemap)) /
sizeof(struct fiemap_extent);
- unsigned long long expected = 0;
+ unsigned long long next_physical = 0;
unsigned long flags = 0;
unsigned int i;
static int fiemap_incompat_printed;
int fiemap_header_printed = 0;
- int tot_extents = 1, n = 0;
+ int tot_extents = 0, n = 0;
+ int previous_device = 0;
int last = 0;
int rc;
- memset(fiemap, 0, sizeof(struct fiemap));
+ fiemap->fm_length = ~0ULL;
+
+ /*
+ * If extents are going to be device ordered, then we may need to use
+ * the first extent to pass the next starting offset and the device.
+ */
+ if (!verbose && !device_offset)
+ count = 0;
if (sync_file)
flags |= FIEMAP_FLAG_SYNC;
if (xattr_map)
flags |= FIEMAP_FLAG_XATTR;
+ if (device_offset)
+ flags |= FIEMAP_FLAG_DEVICE_ORDER;
+
+retry_wo_device_offset:
do {
fiemap->fm_length = ~0ULL;
fiemap->fm_flags = flags;
printf("FIEMAP failed with unsupported "
"flags %x\n", fiemap->fm_flags);
fiemap_incompat_printed = 1;
+ } else if (rc == EBADR && (fiemap->fm_flags &
+ FIEMAP_FLAG_DEVICE_ORDER)) {
+ flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
+ goto retry_wo_device_offset;
}
return rc;
}
+ /* No extents on first call? Skip header and show 0 extents. */
+ if (!verbose || fiemap->fm_mapped_extents == 0) {
+ *num_extents = fiemap->fm_mapped_extents;
+ goto out;
+ }
+
if (verbose && !fiemap_header_printed) {
- /*
- * No extents on first call?
- * Skip header and show 0 extents.
- */
- if (fiemap->fm_mapped_extents == 0) {
- *num_extents = 0;
- goto out;
- }
- printf(" ext %*s %*s %*s length flags\n", logical_width,
- "logical", physical_width, "physical",
- physical_width, "expected");
+ print_extent_header();
fiemap_header_printed = 1;
}
break;
for (i = 0; i < fiemap->fm_mapped_extents; i++) {
- __u64 phy_blk, logical_blk;
- unsigned long ext_len;
+ __u64 physical, logical;
- phy_blk = fm_ext[i].fe_physical >> blk_shift;
- ext_len = fm_ext[i].fe_length >> blk_shift;
- logical_blk = fm_ext[i].fe_logical >> blk_shift;
+ physical = fm_ext[i].fe_physical;
+ logical = fm_ext[i].fe_logical;
- if (logical_blk && phy_blk != expected)
+ if (previous_device != fm_ext[i].fe_device)
+ previous_device = fm_ext[i].fe_device;
+
+ if (physical != next_physical)
tot_extents++;
- else
- expected = 0;
+
if (verbose)
- print_extent_info(&fm_ext[i], n, expected,
- blk_shift);
+ print_extent_info(&fm_ext[i], n, blk_shift,
+ fileinfo);
- expected = phy_blk + ext_len;
+ next_physical = physical + fm_ext[i].fe_length;
if (fm_ext[i].fe_flags & FIEMAP_EXTENT_LAST)
last = 1;
n++;
}
- fiemap->fm_start = (fm_ext[i-1].fe_logical +
- fm_ext[i-1].fe_length);
+ /* For DEVICE_ORDER mappings, if EXTENT_LAST not yet found then
+ * fm_start needs to be the same as it was for earlier ioctl.
+ * The first extent is used to pass the end offset and device
+ * of the last FIEMAP call. Otherwise, we ask for extents
+ * starting from where the last mapping ended. */
+ if (flags & FIEMAP_FLAG_DEVICE_ORDER) {
+ fm_ext[0].fe_logical = fm_ext[i - 1].fe_logical +
+ fm_ext[i - 1].fe_length;
+ fm_ext[0].fe_device = fm_ext[i - 1].fe_device;
+ fiemap->fm_start = 0;
+ } else {
+ fiemap->fm_start = fm_ext[i - 1].fe_logical +
+ fm_ext[i - 1].fe_length;
+ }
} while (last == 0);
*num_extents = tot_extents;
#define EXT2_DIRECT 12
+static int filefrag_fibmap(int fd, int blk_shift, int *num_extents,
+ struct mystat *fileinfo,
+ unsigned long numblocks, int is_ext2)
+{
+ struct fiemap_extent fm_ext;
+ unsigned long i, last_block;
+ unsigned long long logical;
+ /* Blocks per indirect block */
+ const long bpib = fileinfo->st_blksize / 4;
+ int count;
+
+ if (force_extent) {
+ memset(&fm_ext, 0, sizeof(fm_ext));
+ fm_ext.fe_device = fileinfo->st_dev;
+ fm_ext.fe_flags = FIEMAP_EXTENT_MERGED;
+ }
+
+ for (i = 0, logical = 0, *num_extents = 0, count = last_block = 0;
+ i < numblocks;
+ i++, logical += fileinfo->st_blksize) {
+ unsigned long block = 0;
+ int rc;
+
+ if (is_ext2 && last_block) {
+ if (((i - EXT2_DIRECT) % bpib) == 0)
+ last_block++;
+ if (((i - EXT2_DIRECT - bpib) % (bpib * bpib)) == 0)
+ last_block++;
+ if (((i - EXT2_DIRECT - bpib - bpib * bpib) %
+ (((unsigned long long)bpib) * bpib * bpib)) == 0)
+ last_block++;
+ }
+ rc = get_bmap(fd, i, &block);
+ if (rc < 0)
+ return rc;
+ if (block == 0)
+ continue;
+ if (!*num_extents) {
+ (*num_extents)++;
+ if (force_extent) {
+ print_extent_header();
+ fm_ext.fe_physical = block*fileinfo->st_blksize;
+ }
+ }
+ count++;
+ if (force_extent &&
+ (last_block && ((block != last_block + 1) ||
+ fm_ext.fe_logical + fm_ext.fe_length != logical))) {
+ print_extent_info(&fm_ext, *num_extents - 1,
+ blk_shift, fileinfo);
+ fm_ext.fe_logical = logical;
+ fm_ext.fe_physical = block*fileinfo->st_blksize;
+ fm_ext.fe_length = 0;
+ (*num_extents)++;
+ } else if (verbose && last_block && (block != last_block + 1)) {
+ printf("Discontinuity: Block %ld is at %lu (was %lu)\n",
+ i, block, last_block + 1);
+ (*num_extents)++;
+ }
+ fm_ext.fe_length += fileinfo->st_blksize;
+ last_block = block;
+ }
+
+ if (force_extent)
+ print_extent_info(&fm_ext, *num_extents - 1,
+ blk_shift, fileinfo);
+
+ return count;
+}
+
static void frag_report(const char *filename)
{
struct statfs fsinfo;
-#ifdef HAVE_FSTAT64
- struct stat64 fileinfo;
-#else
- struct stat fileinfo;
-#endif
- int bs;
+ struct mystat fileinfo;
+ int blk_shift;
long fd;
- unsigned long block, last_block = 0, numblocks, i, count = 0;
- long bpib; /* Blocks per indirect block */
- long cylgroups;
- int num_extents = 0, expected;
+ unsigned long numblocks;
+ int data_blocks_per_cyl = 1;
+ int num_extents = 1, expected = ~0;
int is_ext2 = 0;
- static int once = 1;
+ static int last_device;
unsigned int flags;
- int rc;
+ int width;
#ifdef HAVE_OPEN64
fd = open64(filename, O_RDONLY);
perror("stat");
return;
}
+ fileinfo.st_blksize = fsinfo.f_bsize;
if (ioctl(fd, EXT3_IOC_GETFLAGS, &flags) < 0)
flags = 0;
if (!(flags & EXT4_EXTENTS_FL) &&
((fsinfo.f_type == 0xef51) || (fsinfo.f_type == 0xef52) ||
(fsinfo.f_type == 0xef53)))
is_ext2++;
- if (verbose && once)
+ if (verbose && last_device != fileinfo.st_dev)
printf("Filesystem type is: %lx\n",
(unsigned long) fsinfo.f_type);
- cylgroups = div_ceil(fsinfo.f_blocks, fsinfo.f_bsize*8);
- if (verbose && is_ext2 && once)
- printf("Filesystem cylinder groups is approximately %ld\n",
- cylgroups);
+ /* Check if filesystem is Lustre. Always print in extent format
+ * with 1kB blocks, using the device-relative logical offsets. */
+ if (fsinfo.f_type == LUSTRE_SUPER_MAGIC) {
+ is_ext2 = 0;
+ force_extent = 1;
+ device_offset = 1;
+ blocksize = blocksize ?: 1024;
+ }
+
+ if (is_ext2) {
+ long cylgroups = div_ceil(fsinfo.f_blocks, fsinfo.f_bsize * 8);
- physical_width = int_log10(fsinfo.f_blocks);
- if (physical_width < 8)
- physical_width = 8;
+ if (verbose && last_device != fileinfo.st_dev)
+ printf("Filesystem cylinder groups approximately %ld\n",
+ cylgroups);
- if (ioctl(fd, FIGETBSZ, &bs) < 0) { /* FIGETBSZ takes an int */
- perror("FIGETBSZ");
- close(fd);
- return;
+ data_blocks_per_cyl = fsinfo.f_bsize * 8 -
+ (fsinfo.f_files / 8 / cylgroups) - 3;
}
+ last_device = fileinfo.st_dev;
+
+ width = int_log10(fsinfo.f_blocks);
+ if (width > physical_width)
+ physical_width = width;
- if (no_bs)
- bs = 1024;
+ numblocks = (fileinfo.st_size + fsinfo.f_bsize - 1) / fsinfo.f_bsize;
+ if (blocksize != 0)
+ blk_shift = int_log2(blocksize);
+ else
+ blk_shift = int_log2(fsinfo.f_bsize);
- bpib = bs / 4;
- numblocks = (fileinfo.st_size + (bs-1)) / bs;
- logical_width = int_log10(numblocks);
- if (logical_width < 7)
- logical_width = 7;
- filesize = (long long)fileinfo.st_size;
+ width = int_log10(numblocks);
+ if (width > logical_width)
+ logical_width = width;
if (verbose)
- printf("File size of %s is %lld (%ld block%s, blocksize %d)\n",
- filename, (long long) fileinfo.st_size, numblocks,
- numblocks == 1 ? "" : "s", bs);
+ printf("File size of %s is %llu (%lu block%s of %d bytes)\n",
+ filename, (unsigned long long)fileinfo.st_size,
+ numblocks * fsinfo.f_bsize >> blk_shift,
+ numblocks == 1 ? "" : "s", 1 << blk_shift);
+
if (force_bmap ||
- filefrag_fiemap(fd, int_log2(bs), &num_extents) != 0) {
- for (i = 0, count = 0; i < numblocks; i++) {
- if (is_ext2 && last_block) {
- if (((i-EXT2_DIRECT) % bpib) == 0)
- last_block++;
- if (((i-EXT2_DIRECT-bpib) % (bpib*bpib)) == 0)
- last_block++;
- if (((i-EXT2_DIRECT-bpib-bpib*bpib) %
- (((__u64) bpib)*bpib*bpib)) == 0)
- last_block++;
+ filefrag_fiemap(fd, blk_shift, &num_extents, &fileinfo) != 0) {
+ expected = filefrag_fibmap(fd, blk_shift, &num_extents,
+ &fileinfo, numblocks, is_ext2);
+ if (expected < 0) {
+ if (errno == EINVAL || errno == ENOTTY) {
+ fprintf(stderr, "%s: FIBMAP unsupported\n",
+ filename);
+ } else if (errno != EPERM) {
+ fprintf(stderr, "%s: FIBMAP error: %s",
+ filename, strerror(errno));
}
- rc = get_bmap(fd, i, &block);
- if (block == 0)
- continue;
- if (!num_extents)
- num_extents++;
- count++;
- if (last_block && (block != last_block+1) ) {
- if (verbose)
- printf("Discontinuity: Block %ld is at "
- "%lu (was %lu)\n",
- i, block, last_block+1);
- num_extents++;
- }
- last_block = block;
+ goto out_close;
}
+ expected = expected / data_blocks_per_cyl + 1;
}
+
if (num_extents == 1)
printf("%s: 1 extent found", filename);
else
printf("%s: %d extents found", filename, num_extents);
- /* count, and thus expected, only set for indirect FIBMAP'd files */
- expected = (count/((bs*8)-(fsinfo.f_files/8/cylgroups)-3))+1;
- if (is_ext2 && expected && expected < num_extents)
+ if (is_ext2 && expected < num_extents)
printf(", perfection would be %d extent%s\n", expected,
- (expected>1) ? "s" : "");
+ (expected > 1) ? "s" : "");
else
fputc('\n', stdout);
+out_close:
close(fd);
- once = 0;
}
static void usage(const char *progname)
{
- fprintf(stderr, "Usage: %s [-Bbvsx] file ...\n", progname);
+ fprintf(stderr, "Usage: %s [-b{blocksize}] [-BeklsvxX] file ...\n",
+ progname);
exit(1);
}
char **cpp;
int c;
- while ((c = getopt(argc, argv, "Bbsvx")) != EOF)
+ while ((c = getopt(argc, argv, "Bb::eklsvxX")) != EOF)
switch (c) {
case 'B':
force_bmap++;
+ force_extent = 0;
break;
case 'b':
- no_bs++;
+ if (optarg) {
+ char *end;
+ blocksize = strtoul(optarg, &end, 0);
+ if (end) {
+ switch (end[0]) {
+ case 'g':
+ case 'G':
+ blocksize *= 1024;
+ /* no break */
+ case 'm':
+ case 'M':
+ blocksize *= 1024;
+ /* no break */
+ case 'k':
+ case 'K':
+ blocksize *= 1024;
+ break;
+ default:
+ break;
+ }
+ }
+ } else { /* allow -b without argument, for compat */
+ fprintf(stderr, "%s: -b needs a blocksize "
+ "option, assuming 1024-byte blocks.\n",
+ argv[0]);
+ blocksize = 1024;
+ }
break;
- case 'v':
- verbose++;
+ case 'e':
+ force_extent++;
+ if (!verbose)
+ verbose++;
+ force_bmap = 0;
+ break;
+ case 'k':
+ blocksize = 1024;
+ break;
+ case 'l':
+ device_offset++;
break;
case 's':
sync_file++;
break;
+ case 'v':
+ verbose++;
+ break;
case 'x':
xattr_map++;
break;
+ case 'X':
+ ext_fmt = hex_fmt;
+ break;
default:
usage(argv[0]);
break;
git://git.whamcloud.com / tools / e2fsprogs.git / commitdiff