#include <sys/ioctl.h>
#include <linux/fs.h>
+#include <linux/version.h>
#include <linux/fiemap.h>
+#if !defined(FIEMAP_EXTENT_SHARED) && (HAVE_OWN_FIEMAP_EXTENT_SHARED_DEFINE == 1)
+#define FIEMAP_EXTENT_SHARED 0x00002000
+#endif
+
#include "utils.h"
#include "commands.h"
#include "kerncompat.h"
#include "rbtree.h"
#include "interval_tree_generic.h"
+#include "help.h"
+#include "fsfeatures.h"
static int summarize = 0;
static unsigned unit_mode = UNITS_RAW;
{
struct shared_extent *sh;
- BUG_ON(len == 0);
+ ASSERT(len != 0);
sh = calloc(1, sizeof(*sh));
if (!sh)
}
}
-#define dprintf(...)
+#define dbgprintf(...)
/*
* Find all extents which overlap 'n', calculate the space
u64 wstart = n->start;
u64 wlast = n->last;
- dprintf("Count overlaps:");
+ dbgprintf("Count overlaps:");
do {
/*
if (wlast < n->last)
wlast = n->last;
- dprintf(" (%llu, %llu)", n->start, n->last);
+ dbgprintf(" (%llu, %llu)", n->start, n->last);
tmp = n;
n = extent_tree_iter_next(n, wstart, wlast);
free(tmp);
} while (n);
- dprintf("; wstart: %llu wlast: %llu total: %llu\n", wstart,
+ dbgprintf("; wstart: %llu wlast: %llu total: %llu\n", wstart,
wlast, wlast - wstart + 1);
return wlast - wstart + 1;
/*
* What we want to do here is get a count of shared bytes within the
- * set of extents we have collected. Specifcally, we don't want to
+ * set of extents we have collected. Specifically, we don't want to
* count any byte more than once, so just adding them up doesn't
* work.
*
else if (cmp > 0)
p = &(*p)->rb_right;
else
- BUG();
+ return -EEXIST;
}
si = calloc(1, sizeof(*si));
if (flags & SKIP_FLAGS)
continue;
+ if (ext_len == 0) {
+ warning("extent %llu has length 0, skipping",
+ (unsigned long long)fm_ext[i].fe_physical);
+ continue;
+ }
+
file_total += ext_len;
if (flags & FIEMAP_EXTENT_SHARED) {
file_shared += ext_len;
dirfd(dirstream),
shared_extents, &tot, &shr,
0);
- if (ret)
+ if (ret == -ENOTTY) {
+ ret = 0;
+ continue;
+ } else if (ret) {
+ fprintf(stderr,
+ "failed to walk dir/file: %s :%s\n",
+ entry->d_name, strerror(-ret));
break;
+ }
ctxt->bytes_total += tot;
ctxt->bytes_shared += shr;
u64 file_total = 0;
u64 file_shared = 0;
u64 dir_set_shared = 0;
- u64 subvol;
int fd;
DIR *dirstream = NULL;
goto out;
}
- ret = lookup_ino_rootid(fd, &subvol);
- if (ret)
- goto out_close;
+ /*
+ * If st.st_ino == BTRFS_EMPTY_SUBVOL_DIR_OBJECTID ==2, there is no any
+ * related tree
+ */
+ if (st.st_ino != BTRFS_EMPTY_SUBVOL_DIR_OBJECTID) {
+ u64 subvol;
+
+ ret = lookup_path_rootid(fd, &subvol);
+ if (ret)
+ goto out_close;
- if (inode_seen(st.st_ino, subvol))
- goto out_close;
+ if (inode_seen(st.st_ino, subvol))
+ goto out_close;
- ret = mark_inode_seen(st.st_ino, subvol);
- if (ret)
- goto out_close;
+ ret = mark_inode_seen(st.st_ino, subvol);
+ if (ret)
+ goto out_close;
+ }
if (S_ISREG(st.st_mode)) {
ret = du_calc_file_space(fd, shared_extents, &file_total,
{
int ret = 0, err = 0;
int i;
+ u32 kernel_version;
unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
- optind = 1;
while (1) {
static const struct option long_options[] = {
{ "summarize", no_argument, NULL, 's'},
if (check_argc_min(argc - optind, 1))
usage(cmd_filesystem_du_usage);
+ kernel_version = get_running_kernel_version();
+
+ if (kernel_version < KERNEL_VERSION(2,6,33)) {
+ warning(
+"old kernel version detected, shared space will be reported as exclusive\n"
+"due to missing support for FIEMAP_EXTENT_SHARED flag");
+ }
+
printf("%10s %10s %10s %s\n", "Total", "Exclusive", "Set shared",
"Filename");