Otherwise the gofer's attach point may be different from sandbox when there
symlinks in the path.
PiperOrigin-RevId: 219730492
Change-Id: Ia9c4c2d16228c6a1a9e790e0cb673fd881003fe1
With recent changes to 9P server, path walks are now safe inside
open, create, rename and setattr calls. To simplify the code, remove
the lazyopen=false mode that was used for bind mounts, and converge
all mounts to using lazy open.
PiperOrigin-RevId: 219508628
Change-Id: I073e7e1e2e9a9972d150eaf4cb29e553997a9b76
This change also adds extensive testing to the p9 package via mocks. The sanity
checks and type checks are moved from the gofer into the core package, where
they can be more easily validated.
PiperOrigin-RevId: 218296768
Change-Id: I4fc3c326e7bf1e0e140a454cbacbcc6fd617ab55
Previously, we were only using the host inode id as the QID path. But the host
filesystem can have multiple devices with conflicting inode ids. This resulted
in duplicate inode ids in the sentry.
This CL generates a unique QID for each <host inode, host device> pair.
PiperOrigin-RevId: 210424813
Change-Id: I16d106f61c7c8f910c0da4ceec562a010ffca2fb
This is used when '--overlay=true' to guarantee writes are not sent to gofer.
PiperOrigin-RevId: 210116288
Change-Id: I7616008c4c0e8d3668e07a205207f46e2144bf30
When multiple containers run inside a sentry, each container has its own root
filesystem and set of mounts. Containers are also added after sentry boot rather
than all configured and known at boot time.
The fsgofer needs to be able to serve the root filesystem of each container.
Thus, it must be possible to add filesystems after the fsgofer has already
started.
This change:
* Creates a URPC endpoint within the gofer process that listens for requests to
serve new content.
* Enables the sentry, when starting a new container, to add the new container's
filesystem.
* Mounts those new filesystems at separate roots within the sentry.
PiperOrigin-RevId: 208903248
Change-Id: Ifa91ec9c8caf5f2f0a9eead83c4a57090ce92068
Refuse to mount paths with "." and ".." in the path to prevent
a compromised Sentry to mount "../../secrets". Only allow
Attach to be called once per mount point.
PiperOrigin-RevId: 199225929
Change-Id: I2a3eb7ea0b23f22eb8dde2e383e32563ec003bd5
os.Rename validates that the target doesn't exist, which is different from
syscall.Rename which replace the target if both are directories. fsgofer needs
the syscall behavior.
PiperOrigin-RevId: 196194630
Change-Id: I87d08cad88b5ef310b245cd91647c4f5194159d8
This is to allow files mapped directly, like /etc/hosts, to be writable.
Closes#40
PiperOrigin-RevId: 196155920
Change-Id: Id2027e421cef5f94a0951c3e18b398a77c285bbd