return (wrote);
}
+static loff_t
+zpl_llseek(struct file *filp, loff_t offset, int whence)
+{
+#if defined(SEEK_HOLE) && defined(SEEK_DATA)
+ if (whence == SEEK_DATA || whence == SEEK_HOLE) {
+ struct inode *ip = filp->f_mapping->host;
+ loff_t maxbytes = ip->i_sb->s_maxbytes;
+ loff_t error;
+
+ spl_inode_lock(ip);
+ error = -zfs_holey(ip, whence, &offset);
+ if (error == 0)
+ error = lseek_execute(filp, ip, offset, maxbytes);
+ spl_inode_unlock(ip);
+
+ return (error);
+ }
+#endif /* SEEK_HOLE && SEEK_DATA */
+
+ return generic_file_llseek(filp, offset, whence);
+}
+
/*
* It's worth taking a moment to describe how mmap is implemented
* for zfs because it differs considerably from other Linux filesystems.
ASSERT(PageLocked(pp));
ASSERT(!PageWriteback(pp));
-
+ ASSERT(!(current->flags & PF_NOFS));
+
+ /*
+ * Annotate this call path with a flag that indicates that it is
+ * unsafe to use KM_SLEEP during memory allocations due to the
+ * potential for a deadlock. KM_PUSHPAGE should be used instead.
+ */
+ current->flags |= PF_NOFS;
(void) zfs_putpage(mapping->host, pp, wbc);
+ current->flags &= ~PF_NOFS;
return (0);
}
}
#endif /* HAVE_FILE_FALLOCATE */
+static long
+zpl_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case ZFS_IOC_GETFLAGS:
+ case ZFS_IOC_SETFLAGS:
+ return (-EOPNOTSUPP);
+ default:
+ return (-ENOTTY);
+ }
+}
+
+#ifdef CONFIG_COMPAT
+static long
+zpl_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ return zpl_ioctl(filp, cmd, arg);
+}
+#endif /* CONFIG_COMPAT */
+
+
const struct address_space_operations zpl_address_space_operations = {
.readpages = zpl_readpages,
.readpage = zpl_readpage,
const struct file_operations zpl_file_operations = {
.open = zpl_open,
.release = zpl_release,
- .llseek = generic_file_llseek,
+ .llseek = zpl_llseek,
.read = zpl_read,
.write = zpl_write,
- .readdir = zpl_readdir,
.mmap = zpl_mmap,
.fsync = zpl_fsync,
#ifdef HAVE_FILE_FALLOCATE
.fallocate = zpl_fallocate,
#endif /* HAVE_FILE_FALLOCATE */
+ .unlocked_ioctl = zpl_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = zpl_compat_ioctl,
+#endif
};
const struct file_operations zpl_dir_file_operations = {
.read = generic_read_dir,
.readdir = zpl_readdir,
.fsync = zpl_fsync,
+ .unlocked_ioctl = zpl_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = zpl_compat_ioctl,
+#endif
};