Messages in this thread Patch in this message | | | Subject | [RFC][PATCH 2/2] first callers of process_deny_checkpoint() | From | Dave Hansen <> | Date | Thu, 09 Oct 2008 12:04:06 -0700 |
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These are just a few simple examples of things we know we can't checkpoint now. There are plenty more, but this should give everyone an idea how this will look in practice.
Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com> ---
linux-2.6.git-dave/fs/aio.c | 7 +++++++ linux-2.6.git-dave/ipc/mqueue.c | 3 +++ linux-2.6.git-dave/net/socket.c | 5 +++++ 3 files changed, 15 insertions(+)
diff -puN fs/aio.c~no-checkpointing-for-sockets fs/aio.c --- linux-2.6.git/fs/aio.c~no-checkpointing-for-sockets 2008-10-09 11:56:58.000000000 -0700 +++ linux-2.6.git-dave/fs/aio.c 2008-10-09 11:56:58.000000000 -0700 @@ -19,6 +19,7 @@ #define DEBUG 0 +#include <linux/checkpoint.h> #include <linux/sched.h> #include <linux/fs.h> #include <linux/file.h> @@ -1663,6 +1664,8 @@ asmlinkage long sys_io_submit(aio_contex if (unlikely(!access_ok(VERIFY_READ, iocbpp, (nr*sizeof(*iocbpp))))) return -EFAULT; + process_deny_checkpointing(current); + ctx = lookup_ioctx(ctx_id); if (unlikely(!ctx)) { pr_debug("EINVAL: io_submit: invalid context id\n"); @@ -1742,6 +1745,8 @@ asmlinkage long sys_io_cancel(aio_contex if (unlikely(!ctx)) return -EINVAL; + process_deny_checkpointing(current); + spin_lock_irq(&ctx->ctx_lock); ret = -EAGAIN; kiocb = lookup_kiocb(ctx, iocb, key); @@ -1796,6 +1801,8 @@ asmlinkage long sys_io_getevents(aio_con struct kioctx *ioctx = lookup_ioctx(ctx_id); long ret = -EINVAL; + process_deny_checkpointing(current); + if (likely(ioctx)) { if (likely(min_nr <= nr && min_nr >= 0 && nr >= 0)) ret = read_events(ioctx, min_nr, nr, events, timeout); diff -puN ipc/mqueue.c~no-checkpointing-for-sockets ipc/mqueue.c --- linux-2.6.git/ipc/mqueue.c~no-checkpointing-for-sockets 2008-10-09 11:56:58.000000000 -0700 +++ linux-2.6.git-dave/ipc/mqueue.c 2008-10-09 11:56:58.000000000 -0700 @@ -14,6 +14,7 @@ */ #include <linux/capability.h> +#include <linux/checkpoint.h> #include <linux/init.h> #include <linux/pagemap.h> #include <linux/file.h> @@ -655,6 +656,8 @@ asmlinkage long sys_mq_open(const char _ char *name; int fd, error; + process_deny_checkpointing(current); + error = audit_mq_open(oflag, mode, u_attr); if (error != 0) return error; diff -puN net/socket.c~no-checkpointing-for-sockets net/socket.c --- linux-2.6.git/net/socket.c~no-checkpointing-for-sockets 2008-10-09 11:56:58.000000000 -0700 +++ linux-2.6.git-dave/net/socket.c 2008-10-09 11:56:58.000000000 -0700 @@ -87,6 +87,7 @@ #include <linux/audit.h> #include <linux/wireless.h> #include <linux/nsproxy.h> +#include <linux/checkpoint.h> #include <asm/uaccess.h> #include <asm/unistd.h> @@ -1236,6 +1237,8 @@ asmlinkage long sys_socket(int family, i if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; + process_deny_checkpointing(current); + retval = sock_create(family, type, protocol, &sock); if (retval < 0) goto out; @@ -2130,6 +2133,8 @@ asmlinkage long sys_socketcall(int call, a0 = a[0]; a1 = a[1]; + process_deny_checkpointing(current); + switch (call) { case SYS_SOCKET: err = sys_socket(a0, a1, a[2]); _
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