[XFS] inode items and EFI/EFDs have different ondisk format for 32bit and

64bit kernels allow recovery to handle both versions and do the necessary
decoding

SGI-PV: 952214
SGI-Modid: xfs-linux-melb:xfs-kern:26011a

Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

1 files changed, 32 insertions, 29 deletions

diff --git a/fs/xfs/xfs_inode_item.h b/fs/xfs/xfs_inode_item.h
index c5dbf93b6661..5db6cd1b4cf3 100644
--- a/fs/xfs/xfs_inode_item.h
+++ b/fs/xfs/xfs_inode_item.h
@@ -23,25 +23,6 @@
  * 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  When an inode log item gets superseded,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 */
@@ -59,18 +40,38 @@ typedef struct xfs_inode_log_format {
         int                     ilf_boffset;    /* off of inode in buffer */
 } xfs_inode_log_format_t;
 
-/* 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 */
+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;      /* rdev value for dev inode*/
-                uuid_t          ilfu_uuid;      /* mount point value */
+                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 */
+        union {
+                xfs_dev_t       ilfu_rdev;      /* 32: rdev value for dev inode*/
+                uuid_t          ilfu_uuid;      /* 128: mount point value */
         } ilf_u;
-} xfs_inode_log_format_t_v1;
+        __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;
 
 /*
  * Flags for xfs_trans_log_inode flags field.
@@ -172,6 +173,8 @@ 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__ */