Commit 81c3f413 authored by J.Bruce Fields's avatar J.Bruce Fields Committed by Linus Torvalds
Browse files

[PATCH] knfsd: nfsd4: xdr encoding for fs_locations



Encode fs_locations attribute.
Signed-off-by: default avatarManoj Naik <manoj@almaden.ibm.com>
Signed-off-by: default avatarFred Isaman <iisaman@citi.umich.edu>
Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: default avatarNeil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 93346919
......@@ -1223,6 +1223,119 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
stateowner->so_replay.rp_buflen); \
} } while (0);
/* Encode as an array of strings the string given with components
* seperated @sep.
*/
static int nfsd4_encode_components(char sep, char *components,
u32 **pp, int *buflen)
{
u32 *p = *pp;
u32 *countp = p;
int strlen, count=0;
char *str, *end;
dprintk("nfsd4_encode_components(%s)\n", components);
if ((*buflen -= 4) < 0)
return nfserr_resource;
WRITE32(0); /* We will fill this in with @count later */
end = str = components;
while (*end) {
for (; *end && (*end != sep); end++)
; /* Point to end of component */
strlen = end - str;
if (strlen) {
if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
return nfserr_resource;
WRITE32(strlen);
WRITEMEM(str, strlen);
count++;
}
else
end++;
str = end;
}
*pp = p;
p = countp;
WRITE32(count);
return 0;
}
/*
* encode a location element of a fs_locations structure
*/
static int nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
u32 **pp, int *buflen)
{
int status;
u32 *p = *pp;
status = nfsd4_encode_components(':', location->hosts, &p, buflen);
if (status)
return status;
status = nfsd4_encode_components('/', location->path, &p, buflen);
if (status)
return status;
*pp = p;
return 0;
}
/*
* Return the path to an export point in the pseudo filesystem namespace
* Returned string is safe to use as long as the caller holds a reference
* to @exp.
*/
static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp)
{
struct svc_fh tmp_fh;
char *path, *rootpath;
int stat;
fh_init(&tmp_fh, NFS4_FHSIZE);
stat = exp_pseudoroot(rqstp->rq_client, &tmp_fh, &rqstp->rq_chandle);
if (stat)
return ERR_PTR(stat);
rootpath = tmp_fh.fh_export->ex_path;
path = exp->ex_path;
if (strncmp(path, rootpath, strlen(rootpath))) {
printk("nfsd: fs_locations failed;"
"%s is not contained in %s\n", path, rootpath);
return ERR_PTR(-EOPNOTSUPP);
}
return path + strlen(rootpath);
}
/*
* encode a fs_locations structure
*/
static int nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
struct svc_export *exp,
u32 **pp, int *buflen)
{
int status, i;
u32 *p = *pp;
struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
char *root = nfsd4_path(rqstp, exp);
if (IS_ERR(root))
return PTR_ERR(root);
status = nfsd4_encode_components('/', root, &p, buflen);
if (status)
return status;
if ((*buflen -= 4) < 0)
return nfserr_resource;
WRITE32(fslocs->locations_count);
for (i=0; i<fslocs->locations_count; i++) {
status = nfsd4_encode_fs_location4(&fslocs->locations[i],
&p, buflen);
if (status)
return status;
}
*pp = p;
return 0;
}
static u32 nfs4_ftypes[16] = {
NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
......@@ -1334,6 +1447,11 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
goto out_nfserr;
}
}
if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
if (exp->ex_fslocs.locations == NULL) {
bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
}
}
if ((buflen -= 16) < 0)
goto out_resource;
......@@ -1513,6 +1631,13 @@ out_acl:
goto out_resource;
WRITE64((u64) statfs.f_files);
}
if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
if (status == nfserr_resource)
goto out_resource;
if (status)
goto out;
}
if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
if ((buflen -= 4) < 0)
goto out_resource;
......
......@@ -292,7 +292,6 @@ static inline int is_fsid(struct svc_fh *fh, struct knfsd_fh *reffh)
/*
* The following attributes are currently not supported by the NFSv4 server:
* ARCHIVE (deprecated anyway)
* FS_LOCATIONS (will be supported eventually)
* HIDDEN (unlikely to be supported any time soon)
* MIMETYPE (unlikely to be supported any time soon)
* QUOTA_* (will be supported in a forthcoming patch)
......@@ -308,7 +307,7 @@ static inline int is_fsid(struct svc_fh *fh, struct knfsd_fh *reffh)
| FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
| FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
| FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
| FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_HOMOGENEOUS \
| FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
| FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
| FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
......
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