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vfs: subtype handling moved to fuse

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The unused vfs code can be removed.  Don't pass empty subtype (same as if
->parse callback isn't called).

The bits that are left involve determining whether it's permitted to split the
filesystem type string passed in to mount(2).  Consequently, this means that we
cannot get rid of the FS_HAS_SUBTYPE flag unless we define that a type string
with a dot in it always indicates a subtype specification.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
David Howells
2019-03-25 16:38:31 +00:00
committed by Miklos Szeredi
parent c30da2e981
commit c7eb686963
6 changed files with 2 additions and 25 deletions
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5
fs/super.c
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@@ -1530,11 +1530,6 @@ int vfs_get_tree(struct fs_context *fc)
sb = fc->root->d_sb;
WARN_ON(!sb->s_bdi);
if (fc->subtype && !sb->s_subtype) {
sb->s_subtype = fc->subtype;
fc->subtype = NULL;
}
/*
* Write barrier is for super_cache_count(). We place it before setting
* SB_BORN as the data dependency between the two functions is the