ceph: clean up on forwarded aborted mds request

[safe/jmp/linux-2.6] / fs / logfs / logfs.h

diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h
index e3082ab..0a3df1a 100644 (file)
--- a/fs/logfs/logfs.h
+++ b/fs/logfs/logfs.h
@@ -82,7 +82,7 @@
 
 /* Read-only filesystem */
 #define LOGFS_SB_FLAG_RO       0x0001
-#define LOGFS_SB_FLAG_SEG_ALIAS        0x0002
+#define LOGFS_SB_FLAG_DIRTY    0x0002
 #define LOGFS_SB_FLAG_OBJ_ALIAS        0x0004
 #define LOGFS_SB_FLAG_SHUTDOWN 0x0008
 
@@ -151,7 +151,8 @@ struct logfs_device_ops {
        int (*write_sb)(struct super_block *sb, struct page *page);
        int (*readpage)(void *_sb, struct page *page);
        void (*writeseg)(struct super_block *sb, u64 ofs, size_t len);
-       int (*erase)(struct super_block *sb, loff_t ofs, size_t len);
+       int (*erase)(struct super_block *sb, loff_t ofs, size_t len,
+                       int ensure_write);
        void (*sync)(struct super_block *sb);
        void (*put_device)(struct super_block *sb);
 };
@@ -256,10 +257,14 @@ struct logfs_shadow {
  * struct shadow_tree
  * @new:                       shadows where old_ofs==0, indexed by new_ofs
  * @old:                       shadows where old_ofs!=0, indexed by old_ofs
+ * @segment_map:               bitfield of segments containing shadows
+ * @no_shadowed_segment:       number of segments containing shadows
  */
 struct shadow_tree {
        struct btree_head64 new;
        struct btree_head64 old;
+       struct btree_head32 segment_map;
+       int no_shadowed_segments;
 };
 
 struct object_alias_item {
@@ -304,13 +309,14 @@ typedef int write_alias_t(struct super_block *sb, u64 ino, u64 bix,
                level_t level, int child_no, __be64 val);
 struct logfs_block_ops {
        void    (*write_block)(struct logfs_block *block);
-       gc_level_t      (*block_level)(struct logfs_block *block);
        void    (*free_block)(struct super_block *sb, struct logfs_block*block);
        int     (*write_alias)(struct super_block *sb,
                        struct logfs_block *block,
                        write_alias_t *write_one_alias);
 };
 
+#define MAX_JOURNAL_ENTRIES 256
+
 struct logfs_super {
        struct mtd_info *s_mtd;                 /* underlying device */
        struct block_device *s_bdev;            /* underlying device */
@@ -327,6 +333,7 @@ struct logfs_super {
        u64      s_feature_compat;
        u64      s_feature_flags;
        u64      s_sb_ofs[2];
+       struct page *s_erase_page;              /* for dev_bdev.c */
        /* alias.c fields */
        struct btree_head32 s_segment_alias;    /* remapped segments */
        int      s_no_object_aliases;
@@ -376,7 +383,7 @@ struct logfs_super {
        u32      s_journal_ec[LOGFS_JOURNAL_SEGS]; /* journal erasecounts */
        u64      s_last_version;
        struct logfs_area *s_journal_area;      /* open journal segment */
-       __be64  s_je_array[64];
+       __be64  s_je_array[MAX_JOURNAL_ENTRIES];
        int     s_no_je;
 
        int      s_sum_index;                   /* for the 12 summaries */
@@ -524,7 +531,7 @@ void logfs_delete_inode(struct inode *inode);
 void logfs_clear_inode(struct inode *inode);
 
 /* journal.c */
-void logfs_write_anchor(struct inode *inode);
+void logfs_write_anchor(struct super_block *sb);
 int logfs_init_journal(struct super_block *sb);
 void logfs_cleanup_journal(struct super_block *sb);
 int write_alias_journal(struct super_block *sb, u64 ino, u64 bix,
@@ -572,7 +579,7 @@ int get_page_reserve(struct inode *inode, struct page *page);
 extern struct logfs_block_ops indirect_block_ops;
 
 /* segment.c */
-int logfs_erase_segment(struct super_block *sb, u32 ofs);
+int logfs_erase_segment(struct super_block *sb, u32 ofs, int ensure_erase);
 int wbuf_read(struct super_block *sb, u64 ofs, size_t len, void *buf);
 int logfs_segment_read(struct inode *inode, struct page *page, u64 ofs, u64 bix,
                level_t level);
@@ -585,6 +592,7 @@ void move_page_to_btree(struct page *page);
 int logfs_init_mapping(struct super_block *sb);
 void logfs_sync_area(struct logfs_area *area);
 void logfs_sync_segments(struct super_block *sb);
+void freeseg(struct super_block *sb, u32 segno);
 
 /* area handling */
 int logfs_init_areas(struct super_block *sb);
@@ -719,4 +727,10 @@ static inline struct logfs_area *get_area(struct super_block *sb,
        return logfs_super(sb)->s_area[(__force u8)gc_level];
 }
 
+static inline void logfs_mempool_destroy(mempool_t *pool)
+{
+       if (pool)
+               mempool_destroy(pool);
+}
+
 #endif