fs: add FL_LAYOUT lease type

[linux-2.6-block.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index ddd2fa7cefd3368acf311080bd1b62de09ca4fa5..84740145f8357fdd7db6b03b127ff4297d828ab2 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -875,6 +875,7 @@ static inline struct file *get_file(struct file *f)
 #define FL_DOWNGRADE_PENDING   256 /* Lease is being downgraded */
 #define FL_UNLOCK_PENDING      512 /* Lease is being broken */
 #define FL_OFDLCK      1024    /* lock is "owned" by struct file */
+#define FL_LAYOUT      2048    /* outstanding pNFS layout */
 
 /*
  * Special return value from posix_lock_file() and vfs_lock_file() for
@@ -2037,6 +2038,16 @@ static inline int break_deleg_wait(struct inode **delegated_inode)
        return ret;
 }
 
+static inline int break_layout(struct inode *inode, bool wait)
+{
+       smp_mb();
+       if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
+               return __break_lease(inode,
+                               wait ? O_WRONLY : O_WRONLY | O_NONBLOCK,
+                               FL_LAYOUT);
+       return 0;
+}
+
 #else /* !CONFIG_FILE_LOCKING */
 static inline int locks_mandatory_locked(struct file *file)
 {
@@ -2092,6 +2103,11 @@ static inline int break_deleg_wait(struct inode **delegated_inode)
        return 0;
 }
 
+static inline int break_layout(struct inode *inode, bool wait)
+{
+       return 0;
+}
+
 #endif /* CONFIG_FILE_LOCKING */
 
 /* fs/open.c */