mariadb/plugin/disks/CMakeLists.txt
Daniel Black 129616c70a MDEV-28592 disks plugin - getmntinfo (BSD) & getmntent (AIX)
Thanks to references from Brad Smith, BSDs use getmntinfo as
a system call for mounted filesystems.

Most BSDs return statfs structures, (and we use OSX's statfs64),
but NetBSD uses a statvfs structure.

Simplify Linux getmntent_r to just use getmntent.

AIX uses getmntent.

An attempt at writing Solaris compatibility with
a small bit of HPUX compatibility was made based on man page
entries only. Fixes welcome.

statvfs structures now use f_bsize for consistency with statfs

Test case adjusted as PATH_MAX is OS defined (e.g. 1023 on AIX)

Fixes: 0ee5cf837e

also fixes:

MDEV-27818: Disk plugin does not show zpool mounted devices

This is because zpool mounted point don't begin with /.

Due to the proliferation of multiple filesystem types since this
was written, we restrict the entries listed in the disks plugin
to excude:
* read only mount points (no point monitoring, and
  includes squash, snaps, sysfs, procfs, cgroups...)
* mount points that aren't directories (excludes /etc/hostname and
  similar mounts in containers). (getmntent (Linux/AIX) only)
* exclude systems where there is no capacity listed (excludes various
  virtual filesystem types).

Reviewer: Sergei Golubchik
2022-08-31 10:32:04 +10:00

24 lines
824 B
CMake

INCLUDE (CheckIncludeFiles)
CHECK_SYMBOL_EXISTS (getmntent "mntent.h" HAVE_GETMNTENT)
CHECK_SYMBOL_EXISTS (getmntent "sys/mnttab.h" HAVE_GETMNTENT_IN_SYS_MNTAB)
CHECK_SYMBOL_EXISTS (setmntent "mntent.h" HAVE_SETMNTENT)
CHECK_SYMBOL_EXISTS (getmntinfo "sys/types.h;sys/mount.h" HAVE_GETMNTINFO)
CHECK_SYMBOL_EXISTS (getmntinfo64 "sys/types.h;sys/mount.h" HAVE_GETMNTINFO64)
IF (HAVE_GETMNTINFO)
CHECK_CXX_SOURCE_COMPILES("
#include <sys/types.h>
#include <sys/statvfs.h>
int main()
{
struct statvfs *s;
return getmntinfo(&s, ST_WAIT);
}
" HAVE_GETMNTINFO_TAKES_statvfs)
ENDIF()
IF (HAVE_GETMNTENT OR HAVE_GETMNTENT_IN_SYS_MNTAB OR
HAVE_GETMNTINFO OR HAVE_GETMNTINFO64)
INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/sql)
MYSQL_ADD_PLUGIN(DISKS information_schema_disks.cc MODULE_ONLY RECOMPILE_FOR_EMBEDDED)
ENDIF()