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xfs: fix xfs_buf magic number endian checks

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Create a separate magic16 check function so that we don't run afoul of
static checkers.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong
2019-02-16 11:47:28 -08:00
parent 7588cbeec6
commit 15baadf72c
8 changed files with 45 additions and 23 deletions
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8
fs/xfs/xfs_buf.h
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@@ -125,7 +125,10 @@ struct xfs_buf_map {
struct xfs_buf_ops {
char *name;
uint32_t magic[2]; /* v4 and v5 on disk magic values */
union {
__be32 magic[2]; /* v4 and v5 on disk magic values */
__be16 magic16[2]; /* v4 and v5 on disk magic values */
};
void (*verify_read)(struct xfs_buf *);
void (*verify_write)(struct xfs_buf *);
xfs_failaddr_t (*verify_struct)(struct xfs_buf *bp);
@@ -387,6 +390,7 @@ extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int);
#define xfs_readonly_buftarg(buftarg) bdev_read_only((buftarg)->bt_bdev)
int xfs_buf_reverify(struct xfs_buf *bp, const struct xfs_buf_ops *ops);
bool xfs_verify_magic(struct xfs_buf *bp, uint32_t dmagic);
bool xfs_verify_magic(struct xfs_buf *bp, __be32 dmagic);
bool xfs_verify_magic16(struct xfs_buf *bp, __be16 dmagic);
#endif /* __XFS_BUF_H__ */