[XFS] Fix to prevent the notorious 'NULL files' problem after a crash.

[firefly-linux-kernel-4.4.55.git] / fs / xfs / xfs_inode.h

diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index e96eb0835fe658a9a2ba8df257eb94a1f130a15d..cfe7b58c4533210012d54b410788cbfc4f4bd52d 100644 (file)
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -287,6 +287,7 @@ typedef struct xfs_inode {
        struct xfs_inode        *i_cnext;       /* cluster hash link forward */
        struct xfs_inode        *i_cprev;       /* cluster hash link backward */
 
+       xfs_fsize_t             i_size;         /* in-memory size */
        /* Trace buffers per inode. */
 #ifdef XFS_BMAP_TRACE
        struct ktrace           *i_xtrace;      /* inode extent list trace */
@@ -305,6 +306,49 @@ typedef struct xfs_inode {
 #endif
 } xfs_inode_t;
 
+#define XFS_ISIZE(ip)  (((ip)->i_d.di_mode & S_IFMT) == S_IFREG) ? \
+                               (ip)->i_size : (ip)->i_d.di_size;
+
+/*
+ * i_flags helper functions
+ */
+static inline void
+__xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
+{
+       ip->i_flags |= flags;
+}
+
+static inline void
+xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
+{
+       spin_lock(&ip->i_flags_lock);
+       __xfs_iflags_set(ip, flags);
+       spin_unlock(&ip->i_flags_lock);
+}
+
+static inline void
+xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
+{
+       spin_lock(&ip->i_flags_lock);
+       ip->i_flags &= ~flags;
+       spin_unlock(&ip->i_flags_lock);
+}
+
+static inline int
+__xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
+{
+       return (ip->i_flags & flags);
+}
+
+static inline int
+xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
+{
+       int ret;
+       spin_lock(&ip->i_flags_lock);
+       ret = __xfs_iflags_test(ip, flags);
+       spin_unlock(&ip->i_flags_lock);
+       return ret;
+}
 #endif /* __KERNEL__ */
 
 
@@ -440,7 +484,7 @@ uint                xfs_ip2xflags(struct xfs_inode *);
 uint           xfs_dic2xflags(struct xfs_dinode_core *);
 int            xfs_ifree(struct xfs_trans *, xfs_inode_t *,
                           struct xfs_bmap_free *);
-void           xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
+int            xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
 int            xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
                                     xfs_fsize_t, int, int);
 int            xfs_iunlink(struct xfs_trans *, xfs_inode_t *);