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qemu/hw
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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
..
9pfs 9pfs: handle walk of ".." in the root directory 2016-08-30 19:23:00 +01:00
acpi trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
alpha trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
arm trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
audio trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
block trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
bt hw/bt: Don't use cpu_to_*w() and *_to_cpup() 2016-07-12 15:08:53 +01:00
char trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
core block/qdev: Let 'drive' property fall back to node name 2016-08-08 13:05:43 +02:00
cpu cpu: Abstract CPU core type 2016-06-17 16:33:48 +10:00
cris cris: Fix broken header guard in hw/cris/boot.h 2016-07-12 16:20:46 +02:00
display trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
dma trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
gpio hw/gpio: QOM'ify zaurus.c 2016-06-14 15:59:13 +01:00
i2c i2c: fix migration regression introduced by broadcast support 2016-08-03 18:44:56 +02:00
i386 trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
ide atapi: fix halted DMA reset 2016-08-09 11:47:23 -04:00
input trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
intc trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
ipack ipack: Update e-mail address 2016-05-18 15:04:27 +03:00
ipmi hw/ipmi: fix spelling 2016-06-07 18:02:48 +03:00
isa trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
lm32 Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
m68k hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
mem nvdimm: fix memory leak in error code path 2016-07-20 19:30:26 +03:00
microblaze Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
mips error: Strip trailing '\n' from error string arguments (again) 2016-08-08 09:00:44 +02:00
misc trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
moxie hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
net e1000e: remove internal interrupt flag 2016-08-22 16:06:08 +08:00
nvram trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
openrisc hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
pci trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
pci-bridge hw/pci-bridge: Convert pxb initialization functions to Error 2016-07-29 00:07:09 +03:00
pci-host apb: convert init to realize 2016-07-29 00:07:09 +03:00
pcmcia hw: Clean up includes 2016-01-29 15:07:25 +00:00
ppc ppc patch queue for 2016-08-15 2016-08-15 21:48:03 +01:00
s390x trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
scsi trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
sd trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
sh4 Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
smbios ipmi: Add SMBIOS table entry 2016-06-24 05:13:57 +03:00
sparc trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
sparc64 util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
ssi ast2400: pretend DMAs are done for U-boot 2016-07-14 16:51:38 +01:00
timer trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
tpm Clean up header guards that don't match their file name 2016-07-12 16:19:16 +02:00
tricore hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
unicore32 hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
usb trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
vfio trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
virtio virtio: fixes 2016-08-24 17:21:03 +01:00
watchdog nmi: remove x86 specific nmi handling 2016-05-23 16:53:46 +02:00
xen Xen: fix converity warning of xen_pt_config_init() 2016-08-12 16:38:18 -07:00
xenpv xen: use a common function for pv and hvm guest backend register calls 2016-08-03 14:52:11 +02:00
xtensa target-xtensa: xtfpga: fix FLASH interface width 2016-07-14 13:59:44 +03:00
Makefile.objs Add a base IPMI interface 2015-12-22 18:39:19 +02:00