summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/alpha/include/asm/fcntl.h2
-rw-r--r--arch/parisc/include/asm/fcntl.h2
-rw-r--r--fs/fcntl.c108
-rw-r--r--include/asm-generic/fcntl.h13
4 files changed, 117 insertions, 8 deletions
diff --git a/arch/alpha/include/asm/fcntl.h b/arch/alpha/include/asm/fcntl.h
index 25da001..e42823e 100644
--- a/arch/alpha/include/asm/fcntl.h
+++ b/arch/alpha/include/asm/fcntl.h
@@ -26,6 +26,8 @@
#define F_GETOWN 6 /* for sockets. */
#define F_SETSIG 10 /* for sockets. */
#define F_GETSIG 11 /* for sockets. */
+#define F_SETOWN_EX 12
+#define F_GETOWN_EX 13
/* for posix fcntl() and lockf() */
#define F_RDLCK 1
diff --git a/arch/parisc/include/asm/fcntl.h b/arch/parisc/include/asm/fcntl.h
index 1e1c824..5f39d55 100644
--- a/arch/parisc/include/asm/fcntl.h
+++ b/arch/parisc/include/asm/fcntl.h
@@ -28,6 +28,8 @@
#define F_SETOWN 12 /* for sockets. */
#define F_SETSIG 13 /* for sockets. */
#define F_GETSIG 14 /* for sockets. */
+#define F_GETOWN_EX 15
+#define F_SETOWN_EX 16
/* for posix fcntl() and lockf() */
#define F_RDLCK 01
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 50a9889..fc089f2 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -263,6 +263,79 @@ pid_t f_getown(struct file *filp)
return pid;
}
+static int f_setown_ex(struct file *filp, unsigned long arg)
+{
+ struct f_owner_ex * __user owner_p = (void * __user)arg;
+ struct f_owner_ex owner;
+ struct pid *pid;
+ int type;
+ int ret;
+
+ ret = copy_from_user(&owner, owner_p, sizeof(owner));
+ if (ret)
+ return ret;
+
+ switch (owner.type) {
+ case F_OWNER_TID:
+ type = PIDTYPE_MAX;
+ break;
+
+ case F_OWNER_PID:
+ type = PIDTYPE_PID;
+ break;
+
+ case F_OWNER_GID:
+ type = PIDTYPE_PGID;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ rcu_read_lock();
+ pid = find_vpid(owner.pid);
+ if (owner.pid && !pid)
+ ret = -ESRCH;
+ else
+ ret = __f_setown(filp, pid, type, 1);
+ rcu_read_unlock();
+
+ return ret;
+}
+
+static int f_getown_ex(struct file *filp, unsigned long arg)
+{
+ struct f_owner_ex * __user owner_p = (void * __user)arg;
+ struct f_owner_ex owner;
+ int ret = 0;
+
+ read_lock(&filp->f_owner.lock);
+ owner.pid = pid_vnr(filp->f_owner.pid);
+ switch (filp->f_owner.pid_type) {
+ case PIDTYPE_MAX:
+ owner.type = F_OWNER_TID;
+ break;
+
+ case PIDTYPE_PID:
+ owner.type = F_OWNER_PID;
+ break;
+
+ case PIDTYPE_PGID:
+ owner.type = F_OWNER_GID;
+ break;
+
+ default:
+ WARN_ON(1);
+ ret = -EINVAL;
+ break;
+ }
+ read_unlock(&filp->f_owner.lock);
+
+ if (!ret)
+ ret = copy_to_user(owner_p, &owner, sizeof(owner));
+ return ret;
+}
+
static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
struct file *filp)
{
@@ -313,6 +386,12 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
case F_SETOWN:
err = f_setown(filp, arg, 1);
break;
+ case F_GETOWN_EX:
+ err = f_getown_ex(filp, arg);
+ break;
+ case F_SETOWN_EX:
+ err = f_setown_ex(filp, arg);
+ break;
case F_GETSIG:
err = filp->f_owner.signum;
break;
@@ -428,8 +507,7 @@ static inline int sigio_perm(struct task_struct *p,
static void send_sigio_to_task(struct task_struct *p,
struct fown_struct *fown,
- int fd,
- int reason)
+ int fd, int reason, int group)
{
/*
* F_SETSIG can change ->signum lockless in parallel, make
@@ -461,11 +539,11 @@ static void send_sigio_to_task(struct task_struct *p,
else
si.si_band = band_table[reason - POLL_IN];
si.si_fd = fd;
- if (!do_send_sig_info(signum, &si, p, true))
+ if (!do_send_sig_info(signum, &si, p, group))
break;
/* fall-through: fall back on the old plain SIGIO signal */
case 0:
- do_send_sig_info(SIGIO, SEND_SIG_PRIV, p, true);
+ do_send_sig_info(SIGIO, SEND_SIG_PRIV, p, group);
}
}
@@ -474,16 +552,23 @@ void send_sigio(struct fown_struct *fown, int fd, int band)
struct task_struct *p;
enum pid_type type;
struct pid *pid;
+ int group = 1;
read_lock(&fown->lock);
+
type = fown->pid_type;
+ if (type == PIDTYPE_MAX) {
+ group = 0;
+ type = PIDTYPE_PID;
+ }
+
pid = fown->pid;
if (!pid)
goto out_unlock_fown;
read_lock(&tasklist_lock);
do_each_pid_task(pid, type, p) {
- send_sigio_to_task(p, fown, fd, band);
+ send_sigio_to_task(p, fown, fd, band, group);
} while_each_pid_task(pid, type, p);
read_unlock(&tasklist_lock);
out_unlock_fown:
@@ -491,10 +576,10 @@ void send_sigio(struct fown_struct *fown, int fd, int band)
}
static void send_sigurg_to_task(struct task_struct *p,
- struct fown_struct *fown)
+ struct fown_struct *fown, int group)
{
if (sigio_perm(p, fown, SIGURG))
- group_send_sig_info(SIGURG, SEND_SIG_PRIV, p);
+ do_send_sig_info(SIGURG, SEND_SIG_PRIV, p, group);
}
int send_sigurg(struct fown_struct *fown)
@@ -502,10 +587,17 @@ int send_sigurg(struct fown_struct *fown)
struct task_struct *p;
enum pid_type type;
struct pid *pid;
+ int group = 1;
int ret = 0;
read_lock(&fown->lock);
+
type = fown->pid_type;
+ if (type == PIDTYPE_MAX) {
+ group = 0;
+ type = PIDTYPE_PID;
+ }
+
pid = fown->pid;
if (!pid)
goto out_unlock_fown;
@@ -514,7 +606,7 @@ int send_sigurg(struct fown_struct *fown)
read_lock(&tasklist_lock);
do_each_pid_task(pid, type, p) {
- send_sigurg_to_task(p, fown);
+ send_sigurg_to_task(p, fown, group);
} while_each_pid_task(pid, type, p);
read_unlock(&tasklist_lock);
out_unlock_fown:
diff --git a/include/asm-generic/fcntl.h b/include/asm-generic/fcntl.h
index 4d3e483..0c3dd86 100644
--- a/include/asm-generic/fcntl.h
+++ b/include/asm-generic/fcntl.h
@@ -73,6 +73,19 @@
#define F_SETSIG 10 /* for sockets. */
#define F_GETSIG 11 /* for sockets. */
#endif
+#ifndef F_SETOWN_EX
+#define F_SETOWN_EX 12
+#define F_GETOWN_EX 13
+#endif
+
+#define F_OWNER_TID 0
+#define F_OWNER_PID 1
+#define F_OWNER_GID 2
+
+struct f_owner_ex {
+ int type;
+ pid_t pid;
+};
/* for F_[GET|SET]FL */
#define FD_CLOEXEC 1 /* actually anything with low bit set goes */
OpenPOWER on IntegriCloud