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freevxfs: handle big endian HP-UX file systems

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To support VxFS filesystems from HP-UX on x86 systems we need to
implement byte swapping, and to keep support for Unixware filesystems
it needs to be the complicated dual-endian kind ala sysvfs.

To do this properly we have to split the on disk and in-core inode
so that we can keep the in-core one in native endianness.  All other
structures are byteswapped on demand.

Signed-off-by: Krzysztof Błaszkowski <kb@sysmikro.com.pl>
[hch: make spare happy]
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Krzysztof Błaszkowski
2016-05-31 08:45:13 +02:00
committed by Christoph Hellwig
parent 6b15d6650c
commit 0d83f7fc83
11 changed files with 405 additions and 277 deletions
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17
fs/freevxfs/vxfs_dir.h
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@@ -48,9 +48,9 @@
* Linux driver for now.
*/
struct vxfs_dirblk {
u_int16_t d_free; /* free space in dirblock */
u_int16_t d_nhash; /* no of hash chains */
u_int16_t d_hash[1]; /* hash chain */
__fs16 d_free; /* free space in dirblock */
__fs16 d_nhash; /* no of hash chains */
__fs16 d_hash[1]; /* hash chain */
};
/*
@@ -63,10 +63,10 @@ struct vxfs_dirblk {
* VxFS directory entry.
*/
struct vxfs_direct {
vx_ino_t d_ino; /* inode number */
u_int16_t d_reclen; /* record length */
u_int16_t d_namelen; /* d_name length */
u_int16_t d_hashnext; /* next hash entry */
__fs32 d_ino; /* inode number */
__fs16 d_reclen; /* record length */
__fs16 d_namelen; /* d_name length */
__fs16 d_hashnext; /* next hash entry */
char d_name[VXFS_NAMELEN]; /* name */
};
@@ -87,6 +87,7 @@ struct vxfs_direct {
/*
* VXFS_DIRBLKOV is the overhead of a specific dirblock.
*/
#define VXFS_DIRBLKOV(dbp) ((sizeof(short) * dbp->d_nhash) + 4)
#define VXFS_DIRBLKOV(sbi, dbp) \
((sizeof(short) * fs16_to_cpu(sbi, dbp->d_nhash)) + 4)
#endif /* _VXFS_DIR_H_ */