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nfs: move nfs_fhandle_hash to common include file

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lockd needs to be able to hash filehandles for tracepoints. Move the
nfs_fhandle_hash() helper to a common nfs include file.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Jeff Layton 2023-03-03 07:16:02 -05:00 committed by Chuck Lever
parent 244cc19196
commit e59fb6749e
2 changed files with 20 additions and 15 deletions
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15
fs/nfs/internal.h
View file

@ -846,27 +846,12 @@ u64 nfs_timespec_to_change_attr(const struct timespec64 *ts)
}
#ifdef CONFIG_CRC32
/**
* nfs_fhandle_hash - calculate the crc32 hash for the filehandle
* @fh - pointer to filehandle
*
* returns a crc32 hash for the filehandle that is compatible with
* the one displayed by "wireshark".
*/
static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
{
return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
}
static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
{
return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
NFS4_STATEID_OTHER_SIZE);
}
#else
static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
{
return 0;
}
static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
{
return 0;

20
include/linux/nfs.h
View file

@ -10,6 +10,7 @@
#include <linux/sunrpc/msg_prot.h>
#include <linux/string.h>
#include <linux/crc32.h>
#include <uapi/linux/nfs.h>
/*
@ -44,4 +45,23 @@ enum nfs3_stable_how {
/* used by direct.c to mark verf as invalid */
NFS_INVALID_STABLE_HOW = -1
};
#ifdef CONFIG_CRC32
/**
* nfs_fhandle_hash - calculate the crc32 hash for the filehandle
* @fh - pointer to filehandle
*
* returns a crc32 hash for the filehandle that is compatible with
* the one displayed by "wireshark".
*/
static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
{
return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
}
#else /* CONFIG_CRC32 */
static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
{
return 0;
}
#endif /* CONFIG_CRC32 */
#endif /* _LINUX_NFS_H */