diff options
| author | Jeff Layton <jlayton@primarydata.com> | 2014-06-17 15:44:14 +0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2014-06-23 19:31:37 +0400 |
| commit | 94ec938b612eb877bb6622847972dd739ef738b8 (patch) | |
| tree | 031f1e13f33fc8a437f0a3e95ece9ff628da6430 /fs/nfsd/nfsfh.h | |
| parent | e2afc81919400505481a985fb389475707195c3c (diff) | |
| download | linux-94ec938b612eb877bb6622847972dd739ef738b8.tar.xz | |
nfsd: add appropriate __force directives to filehandle generation code
The filehandle structs all use host-endian values, but will sometimes
stuff big-endian values into those fields. This is OK since these
values are opaque to the client, but it confuses sparse. Add __force to
make it clear that we are doing this intentionally.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/nfsfh.h')
| -rw-r--r-- | fs/nfsd/nfsfh.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h index 2e89e70ac15c..08236d70c667 100644 --- a/fs/nfsd/nfsfh.h +++ b/fs/nfsd/nfsfh.h @@ -73,8 +73,15 @@ enum fsid_source { extern enum fsid_source fsid_source(struct svc_fh *fhp); -/* This might look a little large to "inline" but in all calls except +/* + * This might look a little large to "inline" but in all calls except * one, 'vers' is constant so moste of the function disappears. + * + * In some cases the values are considered to be host endian and in + * others, net endian. fsidv is always considered to be u32 as the + * callers don't know which it will be. So we must use __force to keep + * sparse from complaining. Since these values are opaque to the + * client, that shouldn't be a problem. */ static inline void mk_fsid(int vers, u32 *fsidv, dev_t dev, ino_t ino, u32 fsid, unsigned char *uuid) @@ -82,7 +89,7 @@ static inline void mk_fsid(int vers, u32 *fsidv, dev_t dev, ino_t ino, u32 *up; switch(vers) { case FSID_DEV: - fsidv[0] = htonl((MAJOR(dev)<<16) | + fsidv[0] = (__force __u32)htonl((MAJOR(dev)<<16) | MINOR(dev)); fsidv[1] = ino_t_to_u32(ino); break; @@ -90,8 +97,8 @@ static inline void mk_fsid(int vers, u32 *fsidv, dev_t dev, ino_t ino, fsidv[0] = fsid; break; case FSID_MAJOR_MINOR: - fsidv[0] = htonl(MAJOR(dev)); - fsidv[1] = htonl(MINOR(dev)); + fsidv[0] = (__force __u32)htonl(MAJOR(dev)); + fsidv[1] = (__force __u32)htonl(MINOR(dev)); fsidv[2] = ino_t_to_u32(ino); break; |