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| author | Al Viro <viro@zeniv.linux.org.uk> | 2014-11-01 03:13:17 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-12-04 14:34:54 -0500 |
| commit | f77c80142e1afe6d5c16975ca5d7d1fc324b16f9 (patch) | |
| tree | c2c8f726402610aee77ccca0627a4c38f944640b /fs/namespace.c | |
| parent | 33c429405a2c8d9e42afb9fee88a63cfb2de1e98 (diff) | |
| download | linux-f77c80142e1afe6d5c16975ca5d7d1fc324b16f9.tar.gz linux-f77c80142e1afe6d5c16975ca5d7d1fc324b16f9.tar.bz2 linux-f77c80142e1afe6d5c16975ca5d7d1fc324b16f9.zip | |
bury struct proc_ns in fs/proc
a) make get_proc_ns() return a pointer to struct ns_common
b) mirror ns_ops in dentry->d_fsdata of ns dentries, so that
is_mnt_ns_file() could get away with fewer dereferences.
That way struct proc_ns becomes invisible outside of fs/proc/*.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namespace.c')
| -rw-r--r-- | fs/namespace.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index f815218f92d3..9dfb4cac0c41 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1570,16 +1570,7 @@ static bool is_mnt_ns_file(struct dentry *dentry) { /* Is this a proxy for a mount namespace? */ struct inode *inode = dentry->d_inode; - struct proc_ns *ei; - - if (!proc_ns_inode(inode)) - return false; - - ei = get_proc_ns(inode); - if (ei->ns_ops != &mntns_operations) - return false; - - return true; + return proc_ns_inode(inode) && dentry->d_fsdata == &mntns_operations; } struct mnt_namespace *to_mnt_ns(struct ns_common *ns) @@ -1596,7 +1587,7 @@ static bool mnt_ns_loop(struct dentry *dentry) if (!is_mnt_ns_file(dentry)) return false; - mnt_ns = to_mnt_ns(get_proc_ns(dentry->d_inode)->ns); + mnt_ns = to_mnt_ns(get_proc_ns(dentry->d_inode)); return current->nsproxy->mnt_ns->seq >= mnt_ns->seq; } |