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fs: no games with DCACHE_UNHASHED

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Filesystems outside the regular namespace do not have to clear DCACHE_UNHASHED
in order to have a working /proc/$pid/fd/XXX. Nothing in proc prevents the
fd link from being used if its dentry is not in the hash.

Also, it does not get put into the dcache hash if DCACHE_UNHASHED is clear;
that depends on the filesystem calling d_add or d_rehash.

So delete the misleading comments and needless code.

Acked-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Nick Piggin
2009-11-18 05:30:19 +01:00
committed by Al Viro
parent b9aff027b2
commit a3a065e3f1
3 changed files with 0 additions and 50 deletions
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13
fs/anon_inodes.c
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@@ -35,16 +35,6 @@ static int anon_inodefs_get_sb(struct file_system_type *fs_type, int flags,
mnt);
}
static int anon_inodefs_delete_dentry(struct dentry *dentry)
{
/*
* We faked vfs to believe the dentry was hashed when we created it.
* Now we restore the flag so that dput() will work correctly.
*/
dentry->d_flags |= DCACHE_UNHASHED;
return 1;
}
/*
* anon_inodefs_dname() is called from d_path().
*/
@@ -60,7 +50,6 @@ static struct file_system_type anon_inode_fs_type = {
.kill_sb = kill_anon_super,
};
static const struct dentry_operations anon_inodefs_dentry_operations = {
.d_delete = anon_inodefs_delete_dentry,
.d_dname = anon_inodefs_dname,
};
@@ -129,8 +118,6 @@ struct file *anon_inode_getfile(const char *name,
atomic_inc(&anon_inode_inode->i_count);
path.dentry->d_op = &anon_inodefs_dentry_operations;
/* Do not publish this dentry inside the global dentry hash table */
path.dentry->d_flags &= ~DCACHE_UNHASHED;
d_instantiate(path.dentry, anon_inode_inode);
error = -ENFILE;