linux-toradex.git/fs/anon_inodes.c, branch v4.8-rc1

vfs: Allocate anon_inode_inode in anon_inode_init()

2014-03-27T16:52:54+00:00

Currently we allocated anon_inode_inode in anon_inodefs_mount. This is
somewhat fragile as if that function ever gets called again, it will
overwrite anon_inode_inode pointer. So move the initialization of
anon_inode_inode to anon_inode_init().

Signed-off-by: Jan Kara 
[ Further simplified on suggestion from Dave Jones ]
Signed-off-by: Linus Torvalds

fs: remove now stale label in anon_inode_init()

2014-03-26T00:43:34+00:00

The previous commit removed the register_filesystem() call and the
associated error handling, but left the label for the error path that no
longer exists.  Remove that too.

Signed-off-by: Linus Torvalds

fs: Avoid userspace mounting anon_inodefs filesystem

2014-03-26T00:42:16+00:00

anon_inodefs filesystem is a kernel internal filesystem userspace
shouldn't mess with. Remove registration of it so userspace cannot
even try to mount it (which would fail anyway because the filesystem is
MS_NOUSER).

This fixes an oops triggered by trinity when it tried mounting
anon_inodefs which overwrote anon_inode_inode pointer while other CPU
has been in anon_inode_getfile() between ihold() and d_instantiate().
Thus effectively creating dentry pointing to an inode without holding a
reference to it.

Reported-by: Sasha Levin 
Signed-off-by: Jan Kara 
Signed-off-by: Linus Torvalds

... and kill anon_inode_getfile_private()

2013-11-09T05:16:28+00:00

it's a seriously misguided API, now fortunately without users.

Signed-off-by: Al Viro

take anon inode allocation to libfs.c

2013-11-09T05:16:27+00:00

Signed-off-by: Al Viro

fs/anon_inode: Introduce a new lib function anon_inode_getfile_private()

2013-07-16T13:32:17+00:00

Introduce a new lib function anon_inode_getfile_private(), it creates a new file
instance by hooking it up to an anonymous inode, and a dentry that describe the
"class" of the file, similar to anon_inode_getfile(), but each file holds a
single inode. Furthermore, anyone who wants to create a private anon file will
benefit from this change.

Signed-off-by: Gu Zheng 
Signed-off-by: Benjamin LaHaise

get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero

2013-02-26T07:46:11+00:00

Signed-off-by: Al Viro

fs: Preserve error code in get_empty_filp(), part 2

2013-02-23T04:31:32+00:00

Allocating a file structure in function get_empty_filp() might fail because
of several reasons:
 - not enough memory for file structures
 - operation is not allowed
 - user is over its limit

Currently the function returns NULL in all cases and we loose the exact
reason of the error. All callers of get_empty_filp() assume that the function
can fail with ENFILE only.

Return error through pointer. Change all callers to preserve this error code.

[AV: cleaned up a bit, carved the get_empty_filp() part out into a separate commit
(things remaining here deal with alloc_file()), removed pipe(2) behaviour change]

Signed-off-by: Anatol Pomozov 
Reviewed-by: "Theodore Ts'o" 
Signed-off-by: Al Viro

anon_inodes: move allocation of anon_inode into ->mount()

2012-03-21T01:29:45+00:00

Signed-off-by: Al Viro

vfs: dont chain pipe/anon/socket on superblock s_inodes list

2011-07-26T16:57:09+00:00

Workloads using pipes and sockets hit inode_sb_list_lock contention.

superblock s_inodes list is needed for quota, dirty, pagecache and
fsnotify management. pipe/anon/socket fs are clearly not candidates for
these.

Signed-off-by: Eric Dumazet 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Al Viro