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libdm: add configure.in checks for fiemap.h and magic.h

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This commit is contained in:
Bryn M. Reeves 2016-07-08 23:38:32 +01:00
parent 61cb58e549
commit 309bdfa224
4 changed files with 34 additions and 5 deletions
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2
configure vendored
View File

@ -5875,7 +5875,7 @@ fi
done
for ac_header in termios.h sys/statvfs.h sys/timerfd.h
for ac_header in termios.h sys/statvfs.h sys/timerfd.h linux/magic.h linux/fiemap.h
do :
as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"

2
configure.in
View File

@ -103,7 +103,7 @@ AC_CHECK_HEADERS([assert.h ctype.h dirent.h errno.h fcntl.h float.h \
sys/time.h sys/types.h sys/utsname.h sys/wait.h time.h \
unistd.h], , [AC_MSG_ERROR(bailing out)])
AC_CHECK_HEADERS(termios.h sys/statvfs.h sys/timerfd.h)
AC_CHECK_HEADERS(termios.h sys/statvfs.h sys/timerfd.h linux/magic.h linux/fiemap.h)
case "$host_os" in
linux*)

6
include/configure.h.in
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@ -264,9 +264,15 @@
/* Define to 1 if you have the <limits.h> header file. */
#undef HAVE_LIMITS_H
/* Define to 1 if you have the <linux/fiemap.h> header file. */
#undef HAVE_LINUX_FIEMAP_H
/* Define to 1 if you have the <linux/fs.h> header file. */
#undef HAVE_LINUX_FS_H
/* Define to 1 if you have the <linux/magic.h> header file. */
#undef HAVE_LINUX_MAGIC_H
/* Define to 1 if you have the <locale.h> header file. */
#undef HAVE_LOCALE_H

29
libdm/libdm-stats.c
View File

@ -21,9 +21,18 @@
#include <sys/ioctl.h>
#include <sys/vfs.h> /* fstatfs */
#include <linux/fs.h> /* FS_IOC_FIEMAP */
#include <linux/fiemap.h> /* fiemap */
#include <linux/magic.h> /* BTRFS_SUPER_MAGIC */
#ifdef __linux__
#include <linux/fs.h> /* FS_IOC_FIEMAP */
#endif
#ifdef HAVE_LINUX_FIEMAP_H
#include <linux/fiemap.h> /* fiemap */
#endif
#ifdef HAVE_LINUX_MAGIC_H
#include <linux/magic.h> /* BTRFS_SUPER_MAGIC */
#endif
#define DM_STATS_REGION_NOT_PRESENT UINT64_MAX
#define DM_STATS_GROUP_NOT_PRESENT DM_STATS_GROUP_NONE
@ -4064,6 +4073,7 @@ int dm_stats_get_group_descriptor(const struct dm_stats *dms,
return 1;
}
#ifdef HAVE_LINUX_FIEMAP_H
/*
* Group a table of region_ids corresponding to the extents of a file.
*/
@ -4258,6 +4268,7 @@ static uint64_t *_stats_create_file_regions(struct dm_stats *dms, int fd,
struct statfs fsbuf;
struct stat buf;
#ifdef BTRFS_SUPER_MAGIC
if (fstatfs(fd, &fsbuf)) {
log_error("fstatfs failed for fd %d", fd);
return 0;
@ -4268,6 +4279,7 @@ static uint64_t *_stats_create_file_regions(struct dm_stats *dms, int fd,
"physical FIEMAP extent data.");
return 0;
}
#endif
if (fstat(fd, &buf)) {
log_error("fstat failed for fd %d", fd);
@ -4360,6 +4372,17 @@ out:
return NULL;
}
#else /* HAVE_LINUX_FIEMAP */
uint64_t *dm_stats_create_regions_from_fd(struct dm_stats *dms, int fd,
int group, int precise,
struct dm_histogram *bounds,
const char *alias)
{
log_error("File mapping requires FIEMAP ioctl support.");
return 0;
}
#endif /* HAVE_LINUX_FIEMAP */
/*
* Backward compatible dm_stats_create_region() implementations.
*