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| author | Nicolas Viennot <Nicolas.Viennot@twosigma.com> | 2019-12-19 02:32:32 +0300 |
|---|---|---|
| committer | Andrei Vagin <avagin@gmail.com> | 2020-03-27 19:36:20 +0300 |
| commit | c1e72aa936bd86fb4cd819e84791e8a9a5c4d572 (patch) | |
| tree | 9aef25e4244481d378ed253fef346ed5ed1a3860 /images/fdinfo.proto | |
| parent | 5dbc24b206cd365db7498dddcd03798c5d8ed4e4 (diff) | |
memfd: add file support
See "man memfd_create" for more information of what memfd is.
This adds support for memfd open files, that are not not memory mapped.
* We add a new kind of file: MEMFD.
* We add two image types MEMFD_FILE, and MEMFD_INODE.
MEMFD_FILE contains usual file information (e.g., position).
MEMFD_INODE contains the memfd name, and a shmid identifier
referring to the content.
* We reuse the shmem facilities for dumping memfd content as it
would be easier to support incremental checkpoints in the future.
Signed-off-by: Nicolas Viennot <Nicolas.Viennot@twosigma.com>
Diffstat (limited to 'images/fdinfo.proto')
| -rw-r--r-- | images/fdinfo.proto | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/images/fdinfo.proto b/images/fdinfo.proto index 77e375aa9..d966d5bc5 100644 --- a/images/fdinfo.proto +++ b/images/fdinfo.proto @@ -16,6 +16,7 @@ import "sk-unix.proto"; import "fifo.proto"; import "pipe.proto"; import "tty.proto"; +import "memfd.proto"; enum fd_types { UND = 0; @@ -36,6 +37,7 @@ enum fd_types { TUNF = 15; EXT = 16; TIMERFD = 17; + MEMFD = 18; /* Any number above the real used. Not stored to image */ CTL_TTY = 65534; @@ -70,4 +72,5 @@ message file_entry { optional fifo_entry fifo = 17; optional pipe_entry pipe = 18; optional tty_file_entry tty = 19; + optional memfd_file_entry memfd = 20; } |