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Christoph Hellwig 2a842acab1 block: introduce new block status code type 
Currently we use nornal Linux errno values in the block layer, and while
we accept any error a few have overloaded magic meanings.  This patch
instead introduces a new  blk_status_t value that holds block layer specific
status codes and explicitly explains their meaning.  Helpers to convert from
and to the previous special meanings are provided for now, but I suspect
we want to get rid of them in the long run - those drivers that have a
errno input (e.g. networking) usually get errnos that don't know about
the special block layer overloads, and similarly returning them to userspace
will usually return somethings that strictly speaking isn't correct
for file system operations, but that's left as an exercise for later.

For now the set of errors is a very limited set that closely corresponds
to the previous overloaded errno values, but there is some low hanging
fruite to improve it.

blk_status_t (ab)uses the sparse __bitwise annotations to allow for sparse
typechecking, so that we can easily catch places passing the wrong values.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
 		2017-06-09 09:27:32 -06:00
..
Makefile um: add ucast ethernet transport 2011-05-25 08:39:41 -07:00
chan.h um: Use tty_port in SIGWINCH handler 2013-03-11 10:08:04 +01:00
chan_kern.c Merge 3.9-rc3 into tty-next 2013-03-21 16:07:34 -07:00
chan_user.c um: Use tty_port in SIGWINCH handler 2013-03-11 10:08:04 +01:00
chan_user.h um: Use tty_port in SIGWINCH handler 2013-03-11 10:08:04 +01:00
cow.h um: switch cow_user.h to htobe{32,64}/betoh{32,64} 2012-04-10 00:13:45 +02:00
cow_sys.h um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
cow_user.c um: switch cow_user.h to htobe{32,64}/betoh{32,64} 2012-04-10 00:13:45 +02:00
daemon.h um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
daemon_kern.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
daemon_user.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
fd.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
harddog_kern.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
harddog_user.c um: Do not use stdin and stdout identifiers for struct members 2015-06-25 22:42:19 +02:00
hostaudio_kern.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
line.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
line.h um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
mconsole.h um: Stop abusing __KERNEL__ 2015-05-31 22:05:32 +02:00
mconsole_kern.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> 2017-03-02 08:42:34 +01:00
mconsole_kern.h um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
mconsole_user.c um: -include user.h for USER_OBJ, trim includes 2011-11-02 14:14:44 +01:00
mmapper_kern.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
net_kern.c net: use core MTU range checking in misc drivers 2016-10-20 14:51:10 -04:00
net_user.c um: fix returns without va_end 2015-12-08 22:26:00 +01:00
null.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
pcap_kern.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
pcap_user.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
pcap_user.h um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
port.h uml: remove useless comments 2009-04-01 08:59:17 -07:00
port_kern.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
port_user.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
pty.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
random.c sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
slip.h
…
slip_common.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
slip_common.h
…
slip_kern.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
slip_user.c um: Do not use stdin and stdout identifiers for struct members 2015-06-25 22:42:19 +02:00
slirp.h
…
slirp_kern.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
slirp_user.c um: Do not use stdin and stdout identifiers for struct members 2015-06-25 22:42:19 +02:00
ssl.c um: Use tty_port_operations->destruct 2013-03-11 10:08:03 +01:00
ssl.h uml: remove useless comments 2009-04-01 08:59:17 -07:00
stderr_console.c
…
stdio_console.c um: Use tty_port_operations->destruct 2013-03-11 10:08:03 +01:00
stdio_console.h uml: remove useless comments 2009-04-01 08:59:17 -07:00
tty.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
ubd.h um: UBD Improvements 2016-12-14 22:46:55 +01:00
ubd_kern.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
ubd_user.c um: UBD Improvements 2016-12-14 22:46:55 +01:00
umcast.h um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
umcast_kern.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
umcast_user.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
vde.h
…
vde_kern.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
vde_user.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
xterm.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
xterm.h uml: remove useless comments 2009-04-01 08:59:17 -07:00
xterm_kern.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00