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authorEric Van Hensbergen <ericvh@kernel.org>2022-12-18 20:34:45 +0000
committerEric Van Hensbergen <ericvh@kernel.org>2023-03-27 02:33:48 +0000
commit6deffc8924b59df173da5fc7a9c96d3717cd9e96 (patch)
tree889271459f1616f67f698d282df9ec844043d4a5 /fs/9p
parent46c30cb8f5393586c6ebc7b53a235c85bfac1de8 (diff)
fs/9p: Add new mount modes
Add some additional mount modes for cache management including specifying directio as a mount option and an option for ignore qid.version for determining whether or not a file is cacheable. Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>
Diffstat (limited to 'fs/9p')
-rw-r--r--fs/9p/v9fs.c16
-rw-r--r--fs/9p/v9fs.h5
2 files changed, 18 insertions, 3 deletions
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index f8e952c013f9..43d3806150a9 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -38,7 +38,7 @@ enum {
/* String options */
Opt_uname, Opt_remotename, Opt_cache, Opt_cachetag,
/* Options that take no arguments */
- Opt_nodevmap, Opt_noxattr,
+ Opt_nodevmap, Opt_noxattr, Opt_directio, Opt_ignoreqv,
/* Access options */
Opt_access, Opt_posixacl,
/* Lock timeout option */
@@ -56,6 +56,8 @@ static const match_table_t tokens = {
{Opt_remotename, "aname=%s"},
{Opt_nodevmap, "nodevmap"},
{Opt_noxattr, "noxattr"},
+ {Opt_directio, "directio"},
+ {Opt_ignoreqv, "ignoreqv"},
{Opt_cache, "cache=%s"},
{Opt_cachetag, "cachetag=%s"},
{Opt_access, "access=%s"},
@@ -125,7 +127,7 @@ int v9fs_show_options(struct seq_file *m, struct dentry *root)
if (v9ses->nodev)
seq_puts(m, ",nodevmap");
if (v9ses->cache)
- seq_printf(m, ",%s", v9fs_cache_modes[v9ses->cache]);
+ seq_printf(m, ",cache=%s", v9fs_cache_modes[v9ses->cache]);
#ifdef CONFIG_9P_FSCACHE
if (v9ses->cachetag && v9ses->cache == CACHE_FSCACHE)
seq_printf(m, ",cachetag=%s", v9ses->cachetag);
@@ -147,6 +149,10 @@ int v9fs_show_options(struct seq_file *m, struct dentry *root)
break;
}
+ if (v9ses->flags & V9FS_IGNORE_QV)
+ seq_puts(m, ",ignoreqv");
+ if (v9ses->flags & V9FS_DIRECT_IO)
+ seq_puts(m, ",directio");
if (v9ses->flags & V9FS_POSIX_ACL)
seq_puts(m, ",posixacl");
@@ -276,6 +282,12 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
case Opt_noxattr:
v9ses->flags |= V9FS_NO_XATTR;
break;
+ case Opt_directio:
+ v9ses->flags |= V9FS_DIRECT_IO;
+ break;
+ case Opt_ignoreqv:
+ v9ses->flags |= V9FS_IGNORE_QV;
+ break;
case Opt_cachetag:
#ifdef CONFIG_9P_FSCACHE
kfree(v9ses->cachetag);
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index 8cd63782a25c..12401f1be5d6 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -37,7 +37,10 @@ enum p9_session_flags {
V9FS_ACCESS_USER = 0x08,
V9FS_ACCESS_CLIENT = 0x10,
V9FS_POSIX_ACL = 0x20,
- V9FS_NO_XATTR = 0x40
+ V9FS_NO_XATTR = 0x40,
+ V9FS_IGNORE_QV = 0x80, /* ignore qid.version for cache hints */
+ V9FS_DIRECT_IO = 0x100,
+ V9FS_SYNC = 0x200
};
/* possible values of ->cache */