Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband

[linux-drm-fsl-dcu.git] / fs / fcntl.c

diff --git a/fs/fcntl.c b/fs/fcntl.c
index d35cbc6bc11206b528a47672678d4337c933ecec..8e382a5d51bd6f757bd694344465de0711d4afb2 100644 (file)
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -77,10 +77,9 @@ repeat:
                start = files->next_fd;
 
        newfd = start;
-       if (start < fdt->max_fdset) {
+       if (start < fdt->max_fds)
                newfd = find_next_zero_bit(fdt->open_fds->fds_bits,
-                       fdt->max_fdset, start);
-       }
+                                          fdt->max_fds, start);
        
        error = -EMFILE;
        if (newfd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
@@ -204,7 +203,7 @@ asmlinkage long sys_dup(unsigned int fildes)
 
 static int setfl(int fd, struct file * filp, unsigned long arg)
 {
-       struct inode * inode = filp->f_dentry->d_inode;
+       struct inode * inode = filp->f_path.dentry->d_inode;
        int error = 0;
 
        /*
@@ -250,19 +249,22 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
        return error;
 }
 
-static void f_modown(struct file *filp, unsigned long pid,
+static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,
                      uid_t uid, uid_t euid, int force)
 {
        write_lock_irq(&filp->f_owner.lock);
        if (force || !filp->f_owner.pid) {
-               filp->f_owner.pid = pid;
+               put_pid(filp->f_owner.pid);
+               filp->f_owner.pid = get_pid(pid);
+               filp->f_owner.pid_type = type;
                filp->f_owner.uid = uid;
                filp->f_owner.euid = euid;
        }
        write_unlock_irq(&filp->f_owner.lock);
 }
 
-int f_setown(struct file *filp, unsigned long arg, int force)
+int __f_setown(struct file *filp, struct pid *pid, enum pid_type type,
+               int force)
 {
        int err;
        
@@ -270,15 +272,44 @@ int f_setown(struct file *filp, unsigned long arg, int force)
        if (err)
                return err;
 
-       f_modown(filp, arg, current->uid, current->euid, force);
+       f_modown(filp, pid, type, current->uid, current->euid, force);
        return 0;
 }
+EXPORT_SYMBOL(__f_setown);
 
+int f_setown(struct file *filp, unsigned long arg, int force)
+{
+       enum pid_type type;
+       struct pid *pid;
+       int who = arg;
+       int result;
+       type = PIDTYPE_PID;
+       if (who < 0) {
+               type = PIDTYPE_PGID;
+               who = -who;
+       }
+       rcu_read_lock();
+       pid = find_pid(who);
+       result = __f_setown(filp, pid, type, force);
+       rcu_read_unlock();
+       return result;
+}
 EXPORT_SYMBOL(f_setown);
 
 void f_delown(struct file *filp)
 {
-       f_modown(filp, 0, 0, 0, 1);
+       f_modown(filp, NULL, PIDTYPE_PID, 0, 0, 1);
+}
+
+pid_t f_getown(struct file *filp)
+{
+       pid_t pid;
+       read_lock(&filp->f_owner.lock);
+       pid = pid_nr(filp->f_owner.pid);
+       if (filp->f_owner.pid_type == PIDTYPE_PGID)
+               pid = -pid;
+       read_unlock(&filp->f_owner.lock);
+       return pid;
 }
 
 static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
@@ -319,7 +350,7 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
                 * current syscall conventions, the only way
                 * to fix this will be in libc.
                 */
-               err = filp->f_owner.pid;
+               err = f_getown(filp);
                force_successful_syscall_return();
                break;
        case F_SETOWN:
@@ -470,24 +501,19 @@ static void send_sigio_to_task(struct task_struct *p,
 void send_sigio(struct fown_struct *fown, int fd, int band)
 {
        struct task_struct *p;
-       int pid;
+       enum pid_type type;
+       struct pid *pid;
        
        read_lock(&fown->lock);
+       type = fown->pid_type;
        pid = fown->pid;
        if (!pid)
                goto out_unlock_fown;
        
        read_lock(&tasklist_lock);
-       if (pid > 0) {
-               p = find_task_by_pid(pid);
-               if (p) {
-                       send_sigio_to_task(p, fown, fd, band);
-               }
-       } else {
-               do_each_task_pid(-pid, PIDTYPE_PGID, p) {
-                       send_sigio_to_task(p, fown, fd, band);
-               } while_each_task_pid(-pid, PIDTYPE_PGID, p);
-       }
+       do_each_pid_task(pid, type, p) {
+               send_sigio_to_task(p, fown, fd, band);
+       } while_each_pid_task(pid, type, p);
        read_unlock(&tasklist_lock);
  out_unlock_fown:
        read_unlock(&fown->lock);
@@ -503,9 +529,12 @@ static void send_sigurg_to_task(struct task_struct *p,
 int send_sigurg(struct fown_struct *fown)
 {
        struct task_struct *p;
-       int pid, ret = 0;
+       enum pid_type type;
+       struct pid *pid;
+       int ret = 0;
        
        read_lock(&fown->lock);
+       type = fown->pid_type;
        pid = fown->pid;
        if (!pid)
                goto out_unlock_fown;
@@ -513,16 +542,9 @@ int send_sigurg(struct fown_struct *fown)
        ret = 1;
        
        read_lock(&tasklist_lock);
-       if (pid > 0) {
-               p = find_task_by_pid(pid);
-               if (p) {
-                       send_sigurg_to_task(p, fown);
-               }
-       } else {
-               do_each_task_pid(-pid, PIDTYPE_PGID, p) {
-                       send_sigurg_to_task(p, fown);
-               } while_each_task_pid(-pid, PIDTYPE_PGID, p);
-       }
+       do_each_pid_task(pid, type, p) {
+               send_sigurg_to_task(p, fown);
+       } while_each_pid_task(pid, type, p);
        read_unlock(&tasklist_lock);
  out_unlock_fown:
        read_unlock(&fown->lock);
@@ -530,7 +552,7 @@ int send_sigurg(struct fown_struct *fown)
 }
 
 static DEFINE_RWLOCK(fasync_lock);
-static kmem_cache_t *fasync_cache __read_mostly;
+static struct kmem_cache *fasync_cache __read_mostly;
 
 /*
  * fasync_helper() is used by some character device drivers (mainly mice)
@@ -544,7 +566,7 @@ int fasync_helper(int fd, struct file * filp, int on, struct fasync_struct **fap
        int result = 0;
 
        if (on) {
-               new = kmem_cache_alloc(fasync_cache, SLAB_KERNEL);
+               new = kmem_cache_alloc(fasync_cache, GFP_KERNEL);
                if (!new)
                        return -ENOMEM;
        }