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| author | Eric Van Hensbergen <ericvh@kernel.org> | 2022-12-17 20:19:34 +0300 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@kernel.org> | 2023-03-27 05:33:48 +0300 |
| commit | 8142db4f2792717837b97e219e5f5203dde17abb (patch) | |
| tree | 2add352a8ebd213de823c5384a83b6e81af952ae /fs/9p | |
| parent | 740b8bf87322701b4607b77346477cbc764f5c56 (diff) | |
| download | linux-8142db4f2792717837b97e219e5f5203dde17abb.tar.xz | |
fs/9p: allow disable of xattr support on mount
xattr creates a lot of additional messages for 9p in
the current implementation. This allows users to
conditionalize xattr support on 9p mount if they
are on a connection with bad latency. Using this
flag is also useful when debugging other aspects
of 9p as it reduces the noise in the trace files.
Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>
Reviewed-by: Dominique Martinet <asmadeus@codewreck.org>
Diffstat (limited to 'fs/9p')
| -rw-r--r-- | fs/9p/v9fs.c | 9 | ||||
| -rw-r--r-- | fs/9p/v9fs.h | 3 | ||||
| -rw-r--r-- | fs/9p/vfs_super.c | 3 |
3 files changed, 12 insertions, 3 deletions
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c index a46bf9121f11..f8e952c013f9 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_nodevmap, Opt_noxattr, /* Access options */ Opt_access, Opt_posixacl, /* Lock timeout option */ @@ -55,6 +55,7 @@ static const match_table_t tokens = { {Opt_uname, "uname=%s"}, {Opt_remotename, "aname=%s"}, {Opt_nodevmap, "nodevmap"}, + {Opt_noxattr, "noxattr"}, {Opt_cache, "cache=%s"}, {Opt_cachetag, "cachetag=%s"}, {Opt_access, "access=%s"}, @@ -149,6 +150,9 @@ int v9fs_show_options(struct seq_file *m, struct dentry *root) if (v9ses->flags & V9FS_POSIX_ACL) seq_puts(m, ",posixacl"); + if (v9ses->flags & V9FS_NO_XATTR) + seq_puts(m, ",noxattr"); + return p9_show_client_options(m, v9ses->clnt); } @@ -269,6 +273,9 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts) case Opt_nodevmap: v9ses->nodev = 1; break; + case Opt_noxattr: + v9ses->flags |= V9FS_NO_XATTR; + break; case Opt_cachetag: #ifdef CONFIG_9P_FSCACHE kfree(v9ses->cachetag); diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index e5d41804b3cd..8cd63782a25c 100644 --- a/fs/9p/v9fs.h +++ b/fs/9p/v9fs.h @@ -36,7 +36,8 @@ enum p9_session_flags { V9FS_ACCESS_SINGLE = 0x04, V9FS_ACCESS_USER = 0x08, V9FS_ACCESS_CLIENT = 0x10, - V9FS_POSIX_ACL = 0x20 + V9FS_POSIX_ACL = 0x20, + V9FS_NO_XATTR = 0x40 }; /* possible values of ->cache */ diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index 65d96fa94ba2..5fc6a945bfff 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -64,7 +64,8 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses, sb->s_magic = V9FS_MAGIC; if (v9fs_proto_dotl(v9ses)) { sb->s_op = &v9fs_super_ops_dotl; - sb->s_xattr = v9fs_xattr_handlers; + if (!(v9ses->flags & V9FS_NO_XATTR)) + sb->s_xattr = v9fs_xattr_handlers; } else { sb->s_op = &v9fs_super_ops; sb->s_time_max = U32_MAX; |