fs: anon_inodes implement dname
Add a d_dname method for anon_inodes filesystem, the same way pipefs and sockfs pseudo filesystems. This allows us to remove the DCACHE_UNHASHED hack from anon_inodes.c (see next patch). [AV: inumber is useless here, dropped from anon_inodefs_dname()] Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Miklos Szeredi <mszeredi@suse.cz> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -45,6 +45,15 @@ static int anon_inodefs_delete_dentry(struct dentry *dentry)
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return 1;
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}
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/*
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* anon_inodefs_dname() is called from d_path().
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*/
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static char *anon_inodefs_dname(struct dentry *dentry, char *buffer, int buflen)
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{
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return dynamic_dname(dentry, buffer, buflen, "anon_inode:%s",
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dentry->d_name.name);
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}
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static struct file_system_type anon_inode_fs_type = {
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.name = "anon_inodefs",
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.get_sb = anon_inodefs_get_sb,
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@ -52,6 +61,7 @@ static struct file_system_type anon_inode_fs_type = {
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};
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static const struct dentry_operations anon_inodefs_dentry_operations = {
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.d_delete = anon_inodefs_delete_dentry,
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.d_dname = anon_inodefs_dname,
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};
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/*
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