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| author | Martin Brandenburg <martin@omnibond.com> | 2016-08-12 18:02:31 +0200 |
|---|---|---|
| committer | Martin Brandenburg <martin@omnibond.com> | 2016-08-12 21:12:54 +0200 |
| commit | 482664ddba81b3a5404fd083bb9697dfffc0b6a4 (patch) | |
| tree | f4dd0268a8cf58fd898f73dd7b26a0a9ef5d2eff /fs/orangefs/super.c | |
| parent | orangefs: record userspace version for feature compatbility (diff) | |
| download | linux-482664ddba81b3a5404fd083bb9697dfffc0b6a4.tar.xz linux-482664ddba81b3a5404fd083bb9697dfffc0b6a4.zip | |
orangefs: add features op
This is a new userspace operation, which will be done if the client-core
version is greater than or equal to 2.9.6. This will provide a way to
implement optional features and to determine which features are
supported by the client-core. If the client-core version is older than
2.9.6, no optional features are supported and the op will not be done.
The intent is to allow protocol extensions without relying on the
client-core's current behavior of ignoring what it doesn't understand.
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Diffstat (limited to 'fs/orangefs/super.c')
| -rw-r--r-- | fs/orangefs/super.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/fs/orangefs/super.c b/fs/orangefs/super.c index b9da9a0281c9..3e484a667340 100644 --- a/fs/orangefs/super.c +++ b/fs/orangefs/super.c @@ -33,6 +33,7 @@ static const match_table_t tokens = { { Opt_err, NULL } }; +uint64_t orangefs_features; static int parse_mount_options(struct super_block *sb, char *options, int silent) @@ -249,6 +250,19 @@ int orangefs_remount(struct orangefs_sb_info_s *orangefs_sb) } op_release(new_op); + + if (orangefs_userspace_version >= 20906) { + new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES); + if (!new_op) + return -ENOMEM; + new_op->upcall.req.features.features = 0; + ret = service_operation(new_op, "orangefs_features", 0); + orangefs_features = new_op->downcall.resp.features.features; + op_release(new_op); + } else { + orangefs_features = 0; + } + return ret; } @@ -492,6 +506,19 @@ struct dentry *orangefs_mount(struct file_system_type *fst, list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks); spin_unlock(&orangefs_superblocks_lock); op_release(new_op); + + if (orangefs_userspace_version >= 20906) { + new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES); + if (!new_op) + return ERR_PTR(-ENOMEM); + new_op->upcall.req.features.features = 0; + ret = service_operation(new_op, "orangefs_features", 0); + orangefs_features = new_op->downcall.resp.features.features; + op_release(new_op); + } else { + orangefs_features = 0; + } + return dget(sb->s_root); free_op: |