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Diffstat (limited to 'fs/eventpoll.c')
-rw-r--r--fs/eventpoll.c40
1 files changed, 13 insertions, 27 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 96355d50534..011b9b8c90c 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -234,8 +234,6 @@ struct ep_pqueue {
/*
* Configuration options available inside /proc/sys/fs/epoll/
*/
-/* Maximum number of epoll devices, per user */
-static int max_user_instances __read_mostly;
/* Maximum number of epoll watched descriptors, per user */
static int max_user_watches __read_mostly;
@@ -261,14 +259,6 @@ static int zero;
ctl_table epoll_table[] = {
{
- .procname = "max_user_instances",
- .data = &max_user_instances,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_minmax,
- .extra1 = &zero,
- },
- {
.procname = "max_user_watches",
.data = &max_user_watches,
.maxlen = sizeof(int),
@@ -491,7 +481,6 @@ static void ep_free(struct eventpoll *ep)
mutex_unlock(&epmutex);
mutex_destroy(&ep->mtx);
- atomic_dec(&ep->user->epoll_devs);
free_uid(ep->user);
kfree(ep);
}
@@ -581,10 +570,6 @@ static int ep_alloc(struct eventpoll **pep)
struct eventpoll *ep;
user = get_current_user();
- error = -EMFILE;
- if (unlikely(atomic_read(&user->epoll_devs) >=
- max_user_instances))
- goto free_uid;
error = -ENOMEM;
ep = kzalloc(sizeof(*ep), GFP_KERNEL);
if (unlikely(!ep))
@@ -1110,7 +1095,7 @@ retry:
/*
* Open an eventpoll file descriptor.
*/
-asmlinkage long sys_epoll_create1(int flags)
+SYSCALL_DEFINE1(epoll_create1, int, flags)
{
int error, fd = -1;
struct eventpoll *ep;
@@ -1141,7 +1126,6 @@ asmlinkage long sys_epoll_create1(int flags)
flags & O_CLOEXEC);
if (fd < 0)
ep_free(ep);
- atomic_inc(&ep->user->epoll_devs);
error_return:
DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d) = %d\n",
@@ -1150,7 +1134,7 @@ error_return:
return fd;
}
-asmlinkage long sys_epoll_create(int size)
+SYSCALL_DEFINE1(epoll_create, int, size)
{
if (size < 0)
return -EINVAL;
@@ -1163,8 +1147,8 @@ asmlinkage long sys_epoll_create(int size)
* the eventpoll file that enables the insertion/removal/change of
* file descriptors inside the interest set.
*/
-asmlinkage long sys_epoll_ctl(int epfd, int op, int fd,
- struct epoll_event __user *event)
+SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
+ struct epoll_event __user *, event)
{
int error;
struct file *file, *tfile;
@@ -1261,8 +1245,8 @@ error_return:
* Implement the event wait interface for the eventpoll file. It is the kernel
* part of the user space epoll_wait(2).
*/
-asmlinkage long sys_epoll_wait(int epfd, struct epoll_event __user *events,
- int maxevents, int timeout)
+SYSCALL_DEFINE4(epoll_wait, int, epfd, struct epoll_event __user *, events,
+ int, maxevents, int, timeout)
{
int error;
struct file *file;
@@ -1319,9 +1303,9 @@ error_return:
* Implement the event wait interface for the eventpoll file. It is the kernel
* part of the user space epoll_pwait(2).
*/
-asmlinkage long sys_epoll_pwait(int epfd, struct epoll_event __user *events,
- int maxevents, int timeout, const sigset_t __user *sigmask,
- size_t sigsetsize)
+SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events,
+ int, maxevents, int, timeout, const sigset_t __user *, sigmask,
+ size_t, sigsetsize)
{
int error;
sigset_t ksigmask, sigsaved;
@@ -1366,8 +1350,10 @@ static int __init eventpoll_init(void)
struct sysinfo si;
si_meminfo(&si);
- max_user_instances = 128;
- max_user_watches = (((si.totalram - si.totalhigh) / 32) << PAGE_SHIFT) /
+ /*
+ * Allows top 4% of lomem to be allocated for epoll watches (per user).
+ */
+ max_user_watches = (((si.totalram - si.totalhigh) / 25) << PAGE_SHIFT) /
EP_ITEM_COST;
/* Initialize the structure used to perform safe poll wait head wake ups */