summaryrefslogtreecommitdiffhomepage
path: root/pkg/sentry/fsimpl/sys/BUILD
diff options
context:
space:
mode:
authorDean Deng <deandeng@google.com>2020-08-04 15:46:33 -0700
committergVisor bot <gvisor-bot@google.com>2020-08-04 15:48:27 -0700
commit0500f84b6f2e279ce953faaff20454aca69ae493 (patch)
tree9978acd448c672d95ca1b7a974acdb0c809d05e1 /pkg/sentry/fsimpl/sys/BUILD
parentaf2f456735252b8412af676a3d6ff61690fdf9a7 (diff)
Add reference counting utility to VFS2.
The utility has several differences from the VFS1 equivalent: - There are no weak references, which have a significant overhead - In order to print useful debug messages with the type of the reference- counted object, we use a generic Refs object with the owner type as a template parameter. In vfs1, this was accomplished by storing a type name and caller stack directly in the ref count (as in vfs1), which increases the struct size by 6x. (Note that the caller stack was needed because fs types like Dirent were shared by all fs implementations; in vfs2, each impl has its own data structures, so this is no longer necessary.) As an example, the utility is added to tmpfs.inode. Updates #1486. PiperOrigin-RevId: 324906582
Diffstat (limited to 'pkg/sentry/fsimpl/sys/BUILD')
0 files changed, 0 insertions, 0 deletions