Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...

[sfrench/cifs-2.6.git] / ipc / shm.c

diff --git a/ipc/shm.c b/ipc/shm.c
index 406c5b208193373b979ce82bffe6617250ea64ed..41c1285d697a6f19a3c9b945691346c9b45ade47 100644 (file)
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -393,6 +393,16 @@ static int shm_fsync(struct file *file, loff_t start, loff_t end, int datasync)
        return sfd->file->f_op->fsync(sfd->file, start, end, datasync);
 }
 
+static long shm_fallocate(struct file *file, int mode, loff_t offset,
+                         loff_t len)
+{
+       struct shm_file_data *sfd = shm_file_data(file);
+
+       if (!sfd->file->f_op->fallocate)
+               return -EOPNOTSUPP;
+       return sfd->file->f_op->fallocate(file, mode, offset, len);
+}
+
 static unsigned long shm_get_unmapped_area(struct file *file,
        unsigned long addr, unsigned long len, unsigned long pgoff,
        unsigned long flags)
@@ -410,6 +420,7 @@ static const struct file_operations shm_file_operations = {
        .get_unmapped_area      = shm_get_unmapped_area,
 #endif
        .llseek         = noop_llseek,
+       .fallocate      = shm_fallocate,
 };
 
 static const struct file_operations shm_file_operations_huge = {
@@ -418,6 +429,7 @@ static const struct file_operations shm_file_operations_huge = {
        .release        = shm_release,
        .get_unmapped_area      = shm_get_unmapped_area,
        .llseek         = noop_llseek,
+       .fallocate      = shm_fallocate,
 };
 
 int is_file_shm_hugepages(struct file *file)
@@ -1036,6 +1048,10 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
        sfd->file = shp->shm_file;
        sfd->vm_ops = NULL;
 
+       err = security_mmap_file(file, prot, flags);
+       if (err)
+               goto out_fput;
+
        down_write(&current->mm->mmap_sem);
        if (addr && !(shmflg & SHM_REMAP)) {
                err = -EINVAL;
@@ -1050,7 +1066,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
                        goto invalid;
        }
                
-       user_addr = do_mmap (file, addr, size, prot, flags, 0);
+       user_addr = do_mmap_pgoff(file, addr, size, prot, flags, 0);
        *raddr = user_addr;
        err = 0;
        if (IS_ERR_VALUE(user_addr))
@@ -1058,6 +1074,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
 invalid:
        up_write(&current->mm->mmap_sem);
 
+out_fput:
        fput(file);
 
 out_nattch: