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nfsd: don't allow setting ctime over v4

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Presumably this is left over from earlier drafts of v4, which listed
TIME_METADATA as writeable.  It's read-only in rfc 3530, and shouldn't
be modifiable anyway.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
J. Bruce Fields 2008-04-24 16:59:30 -04:00
parent c272cca625
commit e36cd4a287
2 changed files with 1 additions and 15 deletions
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14
fs/nfsd/nfs4xdr.c
View file

@ -376,20 +376,6 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *ia
goto xdr_error;
}
}
if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
/* We require the high 32 bits of 'seconds' to be 0, and we ignore
all 32 bits of 'nseconds'. */
READ_BUF(12);
len += 12;
READ32(dummy32);
if (dummy32)
return nfserr_inval;
READ32(iattr->ia_ctime.tv_sec);
READ32(iattr->ia_ctime.tv_nsec);
if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
return nfserr_inval;
iattr->ia_valid |= ATTR_CTIME;
}
if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
READ_BUF(4);
len += 4;

2
include/linux/nfsd/nfsd.h
View file

@ -329,7 +329,7 @@ extern struct timeval nfssvc_boot;
(FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL )
#define NFSD_WRITEABLE_ATTRS_WORD1 \
(FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
| FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_MODIFY_SET)
| FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
#endif /* CONFIG_NFSD_V4 */