This patch adds support to set the FD_CLOEXEC flag for the file descriptors
returned by eventfd, signalfd, timerfd.
fs/anon_inodes.c | 15 +++++++++++----
fs/eventfd.c | 5 +++--
fs/signalfd.c | 6 ++++--
fs/timerfd.c | 6 ++++--
include/asm-x86/ia32_unistd.h | 3 +++
include/linux/anon_inodes.h | 3 +++
include/linux/indirect.h | 3 +++
7 files changed, 31 insertions(+), 10 deletions(-)
--- linux/include/linux/indirect.h
+++ linux/include/linux/indirect.h
@@ -40,5 +40,8 @@ union indirect_params {
#if INDSYSCALL(socketpair)
case INDSYSCALL(socketpair):
#endif
+ case INDSYSCALL(eventfd):
+ case INDSYSCALL(signalfd):
+ case INDSYSCALL(timerfd):
#endif
--- linux/fs/anon_inodes.c
+++ linux/fs/anon_inodes.c
@@ -70,9 +70,9 @@ static struct dentry_operations anon_inodefs_dentry_operations = {
* hence saving memory and avoiding code duplication for the file/inode/dentry
* setup.
*/
-int anon_inode_getfd(int *pfd, struct inode **pinode, struct file **pfile,
- const char *name, const struct file_operations *fops,
- void *priv)
+int anon_inode_getfd_flags(int *pfd, struct inode **pinode, struct file **pfile,
+ const char *name, const struct file_operations *fops,
+ void *priv, int flags)
{
struct qstr this;
struct dentry *dentry;
@@ -85,7 +85,7 @@ int anon_inode_getfd(int *pfd, struct inode **pinode, struct file **pfile,
if (!file)
return -ENFILE;
- error = get_unused_fd();
+ error = get_unused_fd_flags(flags);
if (error < 0)
goto err_put_filp;
fd = error;
@@ -138,6 +138,13 @@ err_put_filp:
put_filp(file);
return error;
}
+
+int anon_inode_getfd(int *pfd, struct inode **pinode, struct file **pfile,
+ const char *name, const struct file_operations *fops,
+ void *priv)
+{
+ return anon_inode_getfd_flags(pfd, pinode, pfile, name, fops, priv, 0);
+}
EXPORT_SYMBOL_GPL(anon_inode_getfd);
/*
--- linux/include/linux/anon_inodes.h
+++ linux/include/linux/anon_inodes.h
@@ -8,6 +8,9 @@
#ifndef _LINUX_ANON_INODES_H
#define _LINUX_ANON_INODES_H
+int anon_inode_getfd_flags(int *pfd, struct inode **pinode, struct file **pfile,
+ const char *name, const struct file_operations *fops,
+ void *priv, int flags);
int anon_inode_getfd(int *pfd, struct inode **pinode, struct file **pfile,
const char *name, const struct file_operations *fops,
void *priv);
--- linux/fs/eventfd.c
+++ linux/fs/eventfd.c
@@ -215,8 +215,9 @@ asmlinkage long sys_eventfd(unsigned int count)
* When we call this, the initialization must be complete, since
* anon_inode_getfd() will install the fd.
*/
- error = anon_inode_getfd(&fd, &inode, &file, "[eventfd]",
- &eventfd_fops, ctx);
+ error = anon_inode_getfd_flags(&fd, &inode, &file, "[eventfd]",
+ &eventfd_fops, ctx,
+ INDIRECT_PARAM(file_flags, flags));
if (!error)
return fd;
--- linux/fs/signalfd.c
+++ linux/fs/signalfd.c
@@ -224,8 +224,10 @@ asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemas
* When we call this, the initialization must be complete, since
* anon_inode_getfd() will install the fd.
*/
- error = anon_inode_getfd(&ufd, &inode, &file, "[signalfd]",
- &signalfd_fops, ctx);
+ error = anon_inode_getfd_flags(&ufd, &inode, &file,
+ "[signalfd]", &signalfd_fops,
+ ctx, INDIRECT_PARAM(file_flags,
+ flags));
if (error)
goto err_fdalloc;
} else {
--- linux/fs/timerfd.c
+++ linux/fs/timerfd.c
@@ -182,8 +182,10 @@ asmlinkage long sys_timerfd(int ufd, int clockid, int flags,
* When we call this, the initialization must be complete, since
* anon_inode_getfd() will install the fd.
*/
- error = anon_inode_getfd(&ufd, &inode, &file, "[timerfd]",
- &timerfd_fops, ctx);
+ error = anon_inode_getfd_flags(&ufd, &inode, &file, "[timerfd]",
+ &timerfd_fops, ctx,
+ INDIRECT_PARAM(file_flags,
+ flags));
if (error)
goto err_tmrcancel;
} else {
--- linux/include/asm-x86/ia32_unistd.h
+++ linux/include/asm-x86/ia32_unistd.h
@@ -15,5 +15,8 @@
#define __NR_ia32_socketcall 102
#define __NR_ia32_sigreturn 119
#define __NR_ia32_rt_sigreturn 173
+#define __NR_ia32_signalfd 321
+#define __NR_ia32_timerfd 322
+#define __NR_ia32_eventfd 323
#endif /* _ASM_X86_64_IA32_UNISTD_H_ */
-
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