linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / fs / xfs / xfs_inode_item.h

diff --git a/fs/xfs/xfs_inode_item.h b/fs/xfs/xfs_inode_item.h
index 5db6cd1..c5dbf93 100644 (file)
--- a/fs/xfs/xfs_inode_item.h
+++ b/fs/xfs/xfs_inode_item.h
@@ -23,6 +23,25 @@
  * log.  The size of the inline data/extents/b-tree root to be logged
  * (if any) is indicated in the ilf_dsize field.  Changes to this structure
  * must be added on to the end.
+ *
+ * Convention for naming inode log item versions :  The current version
+ * is always named XFS_LI_INODE.  When an inode log item gets superseded,
+ * add the latest version of IRIX that will generate logs with that item
+ * to the version name.
+ *
+ * -Version 1 of this structure (XFS_LI_5_3_INODE) included up to the first
+ *     union (ilf_u) field.  This was released with IRIX 5.3-XFS.
+ * -Version 2 of this structure (XFS_LI_6_1_INODE) is currently the entire
+ *     structure.  This was released with IRIX 6.0.1-XFS and IRIX 6.1.
+ * -Version 3 of this structure (XFS_LI_INODE) is the same as version 2
+ *     so a new structure definition wasn't necessary.  However, we had
+ *     to add a new type because the inode cluster size changed from 4K
+ *     to 8K and the version number had to be rev'ved to keep older kernels
+ *     from trying to recover logs with the 8K buffers in them.  The logging
+ *     code can handle recovery on different-sized clusters now so hopefully
+ *     this'll be the last time we need to change the inode log item just
+ *     for a change in the inode cluster size.  This new version was
+ *     released with IRIX 6.2.
  */
 typedef struct xfs_inode_log_format {
        unsigned short          ilf_type;       /* inode log item type */
@@ -40,38 +59,18 @@ typedef struct xfs_inode_log_format {
        int                     ilf_boffset;    /* off of inode in buffer */
 } xfs_inode_log_format_t;
 
-typedef struct xfs_inode_log_format_32 {
-       unsigned short          ilf_type;       /* 16: inode log item type */
-       unsigned short          ilf_size;       /* 16: size of this item */
-       uint                    ilf_fields;     /* 32: flags for fields logged */
-       ushort                  ilf_asize;      /* 32: size of attr d/ext/root */
-       ushort                  ilf_dsize;      /* 32: size of data/ext/root */
-       xfs_ino_t               ilf_ino;        /* 64: inode number */
-       union {
-               xfs_dev_t       ilfu_rdev;      /* 32: rdev value for dev inode*/
-               uuid_t          ilfu_uuid;      /* 128: mount point value */
-       } ilf_u;
-       __int64_t               ilf_blkno;      /* 64: blkno of inode buffer */
-       int                     ilf_len;        /* 32: len of inode buffer */
-       int                     ilf_boffset;    /* 32: off of inode in buffer */
-} __attribute__((packed)) xfs_inode_log_format_32_t;
-
-typedef struct xfs_inode_log_format_64 {
-       unsigned short          ilf_type;       /* 16: inode log item type */
-       unsigned short          ilf_size;       /* 16: size of this item */
-       uint                    ilf_fields;     /* 32: flags for fields logged */
-       ushort                  ilf_asize;      /* 32: size of attr d/ext/root */
-       ushort                  ilf_dsize;      /* 32: size of data/ext/root */
-       __uint32_t              ilf_pad;        /* 32: pad for 64 bit boundary */
-       xfs_ino_t               ilf_ino;        /* 64: inode number */
+/* Initial version shipped with IRIX 5.3-XFS */
+typedef struct xfs_inode_log_format_v1 {
+       unsigned short          ilf_type;       /* inode log item type */
+       unsigned short          ilf_size;       /* size of this item */
+       uint                    ilf_fields;     /* flags for fields logged */
+       uint                    ilf_dsize;      /* size of data/ext/root */
+       xfs_ino_t               ilf_ino;        /* inode number */
        union {
-               xfs_dev_t       ilfu_rdev;      /* 32: rdev value for dev inode*/
-               uuid_t          ilfu_uuid;      /* 128: mount point value */
+               xfs_dev_t       ilfu_rdev;      /* rdev value for dev inode*/
+               uuid_t          ilfu_uuid;      /* mount point value */
        } ilf_u;
-       __int64_t               ilf_blkno;      /* 64: blkno of inode buffer */
-       int                     ilf_len;        /* 32: len of inode buffer */
-       int                     ilf_boffset;    /* 32: off of inode in buffer */
-} xfs_inode_log_format_64_t;
+} xfs_inode_log_format_t_v1;
 
 /*
  * Flags for xfs_trans_log_inode flags field.
@@ -173,8 +172,6 @@ extern void xfs_inode_item_destroy(struct xfs_inode *);
 extern void xfs_iflush_done(struct xfs_buf *, xfs_inode_log_item_t *);
 extern void xfs_istale_done(struct xfs_buf *, xfs_inode_log_item_t *);
 extern void xfs_iflush_abort(struct xfs_inode *);
-extern int xfs_inode_item_format_convert(xfs_log_iovec_t *,
-                                        xfs_inode_log_format_t *);
 
 #endif /* __KERNEL__ */