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| author | Dominique Martinet <dominique.martinet@cea.fr> | 2014-01-10 13:44:09 +0100 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2014-01-10 09:20:51 -0600 |
| commit | fb89b45cdfdc8bdab93986f1bc1474e313295c31 (patch) | |
| tree | c19ec0f84315c6dc77ca2447f58e2508b76ce88a /fs/9p/v9fs.c | |
| parent | f94741fd2832e7abc30fbf6dc13ed627c1fcc01a (diff) | |
| download | linux-fb89b45cdfdc8bdab93986f1bc1474e313295c31.tar.bz2 | |
9P: introduction of a new cache=mmap model.
- Add cache=mmap option
- Make mmap read-write while keeping it as synchronous as possible
- Build writeback fid on mmap creation if it is writable
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'fs/9p/v9fs.c')
| -rw-r--r-- | fs/9p/v9fs.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c index 08f2e1e9a7e6..14da82564f4e 100644 --- a/fs/9p/v9fs.c +++ b/fs/9p/v9fs.c @@ -56,7 +56,7 @@ enum { /* Options that take no arguments */ Opt_nodevmap, /* Cache options */ - Opt_cache_loose, Opt_fscache, + Opt_cache_loose, Opt_fscache, Opt_mmap, /* Access options */ Opt_access, Opt_posixacl, /* Error token */ @@ -74,6 +74,7 @@ static const match_table_t tokens = { {Opt_cache, "cache=%s"}, {Opt_cache_loose, "loose"}, {Opt_fscache, "fscache"}, + {Opt_mmap, "mmap"}, {Opt_cachetag, "cachetag=%s"}, {Opt_access, "access=%s"}, {Opt_posixacl, "posixacl"}, @@ -91,6 +92,9 @@ static int get_cache_mode(char *s) } else if (!strcmp(s, "fscache")) { version = CACHE_FSCACHE; p9_debug(P9_DEBUG_9P, "Cache mode: fscache\n"); + } else if (!strcmp(s, "mmap")) { + version = CACHE_MMAP; + p9_debug(P9_DEBUG_9P, "Cache mode: mmap\n"); } else if (!strcmp(s, "none")) { version = CACHE_NONE; p9_debug(P9_DEBUG_9P, "Cache mode: none\n"); @@ -220,6 +224,9 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts) case Opt_fscache: v9ses->cache = CACHE_FSCACHE; break; + case Opt_mmap: + v9ses->cache = CACHE_MMAP; + break; case Opt_cachetag: #ifdef CONFIG_9P_FSCACHE v9ses->cachetag = match_strdup(&args[0]); |