Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

[sfrench/cifs-2.6.git] / fs / ocfs2 / ocfs2.h

diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index db8e77cd35d34e1653a9adc841f0ab422f9c994d..5cc90a40b3c56a687bf1b7396d252771ecbdbbdf 100644 (file)
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -46,11 +46,6 @@
 #include "endian.h"
 #include "ocfs2_lockid.h"
 
-struct ocfs2_extent_map {
-       u32             em_clusters;
-       struct rb_root  em_extents;
-};
-
 /* Most user visible OCFS2 inodes will have very few pieces of
  * metadata, but larger files (including bitmaps, etc) must be taken
  * into account when designing an access scheme. We allow a small
@@ -224,6 +219,7 @@ struct ocfs2_super
        u16 max_slots;
        s16 node_num;
        s16 slot_num;
+       s16 preferred_slot;
        int s_sectsize_bits;
        int s_clustersize;
        int s_clustersize_bits;
@@ -303,6 +299,26 @@ static inline int ocfs2_should_order_data(struct inode *inode)
        return 1;
 }
 
+static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
+{
+       if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
+               return 1;
+       return 0;
+}
+
+static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
+{
+       /*
+        * Support for sparse files is a pre-requisite
+        */
+       if (!ocfs2_sparse_alloc(osb))
+               return 0;
+
+       if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
+               return 1;
+       return 0;
+}
+
 /* set / clear functions because cluster events can make these happen
  * in parallel so we want the transitions to be atomic. this also
  * means that any future flags osb_flags must be protected by spinlock
@@ -361,9 +377,9 @@ static inline int ocfs2_mount_local(struct ocfs2_super *osb)
        typeof(__di) ____di = (__di);                                   \
        ocfs2_error((__sb),                                             \
                "Dinode # %llu has bad signature %.*s",                 \
-               (unsigned long long)(____di)->i_blkno, 7,               \
+               (unsigned long long)le64_to_cpu((____di)->i_blkno), 7,  \
                (____di)->i_signature);                                 \
-} while (0);
+} while (0)
 
 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr)                               \
        (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
@@ -372,9 +388,9 @@ static inline int ocfs2_mount_local(struct ocfs2_super *osb)
        typeof(__eb) ____eb = (__eb);                                   \
        ocfs2_error((__sb),                                             \
                "Extent Block # %llu has bad signature %.*s",           \
-               (unsigned long long)(____eb)->h_blkno, 7,               \
+               (unsigned long long)le64_to_cpu((____eb)->h_blkno), 7,  \
                (____eb)->h_signature);                                 \
-} while (0);
+} while (0)
 
 #define OCFS2_IS_VALID_GROUP_DESC(ptr)                                 \
        (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
@@ -383,9 +399,9 @@ static inline int ocfs2_mount_local(struct ocfs2_super *osb)
        typeof(__gd) ____gd = (__gd);                                   \
                ocfs2_error((__sb),                                     \
                "Group Descriptor # %llu has bad signature %.*s",       \
-               (unsigned long long)(____gd)->bg_blkno, 7,              \
+               (unsigned long long)le64_to_cpu((____gd)->bg_blkno), 7, \
                (____gd)->bg_signature);                                \
-} while (0);
+} while (0)
 
 static inline unsigned long ino_from_blkno(struct super_block *sb,
                                           u64 blkno)
@@ -461,6 +477,49 @@ static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
        return (unsigned long)((bytes + 511) >> 9);
 }
 
+static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
+                                                       unsigned long pg_index)
+{
+       u32 clusters = pg_index;
+       unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
+
+       if (unlikely(PAGE_CACHE_SHIFT > cbits))
+               clusters = pg_index << (PAGE_CACHE_SHIFT - cbits);
+       else if (PAGE_CACHE_SHIFT < cbits)
+               clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT);
+
+       return clusters;
+}
+
+/*
+ * Find the 1st page index which covers the given clusters.
+ */
+static inline unsigned long ocfs2_align_clusters_to_page_index(struct super_block *sb,
+                                                       u32 clusters)
+{
+       unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
+       unsigned long index = clusters;
+
+       if (PAGE_CACHE_SHIFT > cbits) {
+               index = clusters >> (PAGE_CACHE_SHIFT - cbits);
+       } else if (PAGE_CACHE_SHIFT < cbits) {
+               index = clusters << (cbits - PAGE_CACHE_SHIFT);
+       }
+
+       return index;
+}
+
+static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
+{
+       unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
+       unsigned int pages_per_cluster = 1;
+
+       if (PAGE_CACHE_SHIFT < cbits)
+               pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT);
+
+       return pages_per_cluster;
+}
+
 #define ocfs2_set_bit ext2_set_bit
 #define ocfs2_clear_bit ext2_clear_bit
 #define ocfs2_test_bit ext2_test_bit