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ircd::fs: Add runtime support indicators for write_life related features.

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This commit is contained in:
Jason Volk 2019-05-05 17:32:07 -07:00
parent 82200a9abd
commit 861df761fe
2 changed files with 26 additions and 0 deletions
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2
include/ircd/fs/fs.h
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@ -43,6 +43,8 @@ namespace ircd::fs
extern const bool support_hipri;
extern const bool support_sync;
extern const bool support_dsync;
extern const bool support_rwh_write_life;
extern const bool support_rwf_write_life;
// Log facility for ircd::fs
extern log::log log;

24
ircd/fs.cc
View file

@ -99,6 +99,27 @@ ircd::fs::support_append
#endif
};
decltype(ircd::fs::support_rwh_write_life)
ircd::fs::support_rwh_write_life
{
#if defined(HAVE_FCNTL_H) && defined(F_SET_FILE_RW_HINT)
info::kversion[0] >= 4 &&
info::kversion[1] >= 13
#else
false
#endif
};
decltype(ircd::fs::support_rwf_write_life)
ircd::fs::support_rwf_write_life
{
#if defined(RWF_WRITE_LIFE_SHIFT)
false //TODO: XXX
#else
false
#endif
};
//
// init
//
@ -1508,6 +1529,9 @@ void
ircd::fs::write_life(const fd &fd,
const uint64_t &hint)
{
if(!support_rwh_write_life)
return;
syscall(::fcntl, int(fd), F_SET_FILE_RW_HINT, &hint);
}
#else