qemu/hw/9pfs
Greg Kurz 56f101ecce 9pfs: handle walk of ".." in the root directory
The 9P spec at http://man.cat-v.org/plan_9/5/intro says:

All directories must support walks to the directory .. (dot-dot) meaning
parent directory, although by convention directories contain no explicit
entry for .. or . (dot).  The parent of the root directory of a server's
tree is itself.

This means that a client cannot walk further than the root directory
exported by the server. In other words, if the client wants to walk
"/.." or "/foo/../..", the server should answer like the request was
to walk "/".

This patch just does that:
- we cache the QID of the root directory at attach time
- during the walk we compare the QID of each path component with the root
  QID to detect if we're in a "/.." situation
- if so, we skip the current component and go to the next one

Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-08-30 19:23:00 +01:00
..
9p-handle.c 9p: switch back to readdir() 2016-06-06 11:52:34 +02:00
9p-local.c 9p: switch back to readdir() 2016-06-06 11:52:34 +02:00
9p-posix-acl.c 9pfs: Clean up includes 2016-01-29 15:07:23 +00:00
9p-proxy.c 9p: switch back to readdir() 2016-06-06 11:52:34 +02:00
9p-proxy.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
9p-synth.c 9p: synth: drop v9fs_ prefix 2016-07-01 14:38:54 +02:00
9p-synth.h Clean up header guards that don't match their file name 2016-07-12 16:19:16 +02:00
9p-xattr-user.c 9pfs: Clean up includes 2016-01-29 15:07:23 +00:00
9p-xattr.c 9pfs: Clean up includes 2016-01-29 15:07:23 +00:00
9p-xattr.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
9p.c 9pfs: handle walk of ".." in the root directory 2016-08-30 19:23:00 +01:00
9p.h 9pfs: handle walk of ".." in the root directory 2016-08-30 19:23:00 +01:00
codir.c 9p: switch back to readdir() 2016-06-06 11:52:34 +02:00
cofile.c 9p/fsdev: remove obsolete references to virtio 2016-06-06 11:52:34 +02:00
cofs.c 9p/fsdev: remove obsolete references to virtio 2016-06-06 11:52:34 +02:00
coth.c coroutine: move entry argument to qemu_coroutine_create 2016-07-13 13:26:02 +02:00
coth.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
coxattr.c 9p/fsdev: remove obsolete references to virtio 2016-06-06 11:52:34 +02:00
Makefile.objs 9pfs: rename virtio-9p.c to 9p.c 2016-01-08 15:32:13 +05:30
trace-events trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
virtio-9p-device.c 9pfs: Wrap in vmstate 2016-07-21 20:44:20 +03:00
virtio-9p.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00