From a3a065e3f13da8a3470ed09c7f38aad256083726 Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Wed, 18 Nov 2009 05:30:19 +0100 Subject: fs: no games with DCACHE_UNHASHED Filesystems outside the regular namespace do not have to clear DCACHE_UNHASHED in order to have a working /proc/$pid/fd/XXX. Nothing in proc prevents the fd link from being used if its dentry is not in the hash. Also, it does not get put into the dcache hash if DCACHE_UNHASHED is clear; that depends on the filesystem calling d_add or d_rehash. So delete the misleading comments and needless code. Acked-by: Miklos Szeredi Signed-off-by: Nick Piggin Signed-off-by: Al Viro --- net/socket.c | 19 ------------------- 1 file changed, 19 deletions(-) (limited to 'net/socket.c') diff --git a/net/socket.c b/net/socket.c index dbfdfa96d29b..769c386bd428 100644 --- a/net/socket.c +++ b/net/socket.c @@ -312,18 +312,6 @@ static struct file_system_type sock_fs_type = { .kill_sb = kill_anon_super, }; -static int sockfs_delete_dentry(struct dentry *dentry) -{ - /* - * At creation time, we pretended this dentry was hashed - * (by clearing DCACHE_UNHASHED bit in d_flags) - * At delete time, we restore the truth : not hashed. - * (so that dput() can proceed correctly) - */ - dentry->d_flags |= DCACHE_UNHASHED; - return 0; -} - /* * sockfs_dname() is called from d_path(). */ @@ -334,7 +322,6 @@ static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) } static const struct dentry_operations sockfs_dentry_operations = { - .d_delete = sockfs_delete_dentry, .d_dname = sockfs_dname, }; @@ -374,12 +361,6 @@ static int sock_alloc_file(struct socket *sock, struct file **f, int flags) path.mnt = mntget(sock_mnt); path.dentry->d_op = &sockfs_dentry_operations; - /* - * We dont want to push this dentry into global dentry hash table. - * We pretend dentry is already hashed, by unsetting DCACHE_UNHASHED - * This permits a working /proc/$pid/fd/XXX on sockets - */ - path.dentry->d_flags &= ~DCACHE_UNHASHED; d_instantiate(path.dentry, SOCK_INODE(sock)); SOCK_INODE(sock)->i_fop = &socket_file_ops; -- cgit v1.2.3-59-g8ed1b