user/sven/linux.git/fs/proc/namespaces.c, branch v4.4

don't pass nameidata to ->follow_link()

2015-05-11T02:20:15Z

its only use is getting passed to nd_jump_link(), which can obtain it from current->nameidata Signed-off-by: Al Viro

new ->follow_link() and ->put_link() calling conventions

2015-05-11T02:19:45Z

a) instead of storing the symlink body (via nd_set_link()) and returning an opaque pointer later passed to ->put_link(), ->follow_link() _stores_ that opaque pointer (into void * passed by address by caller) and returns the symlink body. Returning ERR_PTR() on error, NULL on jump (procfs magic symlinks) and pointer to symlink body for normal symlinks. Stored pointer is ignored in all cases except the last one. Storing NULL for opaque pointer (or not storing it at all) means no call of ->put_link(). b) the body used to be passed to ->put_link() implicitly (via nameidata). Now only the opaque pointer is. In the cases when we used the symlink body to free stuff, ->follow_link() now should store it as opaque pointer in addition to returning it. Signed-off-by: Al Viro

VFS: normal filesystems (and lustre): d_inode() annotations

2015-04-15T19:06:57Z

that's the bulk of filesystem drivers dealing with inodes of their own Signed-off-by: David Howells Signed-off-by: Al Viro

kill proc_ns completely

2014-12-11T02:30:57Z

procfs inodes need only the ns_ops part; nsfs inodes don't need it at all Signed-off-by: Al Viro

take the targets of /proc//ns/ symlinks to separate fs

2014-12-11T02:30:20Z

New pseudo-filesystem: nsfs. Targets of /proc/*/ns/* live there now. It's not mountable (not even registered, so it's not in /proc/filesystems, etc.). Files on it *are* bindable - we explicitly permit that in do_loopback(). This stuff lives in fs/nsfs.c now; proc_ns_fget() moved there as well. get_proc_ns() is a macro now (it's simply returning ->i_private; would have been an inline, if not for header ordering headache). proc_ns_inode() is an ex-parrot. The interface used in procfs is ns_get_path(path, task, ops) and ns_get_name(buf, size, task, ops). Dentries and inodes are never hashed; a non-counting reference to dentry is stashed in ns_common (removed by ->d_prune()) and reused by ns_get_path() if present. See ns_get_path()/ns_prune_dentry/nsfs_evict() for details of that mechanism. As the result, proc_ns_follow_link() has stopped poking in nd->path.mnt; it does nd_jump_link() on a consistent pair it gets from ns_get_path(). Signed-off-by: Al Viro

bury struct proc_ns in fs/proc

2014-12-04T19:34:54Z

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

make proc_ns_operations work with struct ns_common * instead of void *

2014-12-04T19:34:17Z

We can do that now. And kill ->inum(), while we are at it - all instances are identical. Signed-off-by: Al Viro

new helper: readlink_copy()

2014-04-02T03:19:15Z

Signed-off-by: Al Viro

consolidate simple ->d_delete() instances

2013-11-16T03:04:17Z

Rename simple_delete_dentry() to always_delete_dentry() and export it. Export simple_dentry_operations, while we are at it, and get rid of their duplicates Signed-off-by: Al Viro

proc_fill_cache(): just make instantiate_t return int

2013-06-29T08:57:18Z

all instances always return ERR_PTR(-E...) or NULL, anyway Signed-off-by: Al Viro