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| author | J. Bruce Fields <bfields@citi.umich.edu> | 2009-10-25 21:33:15 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2009-12-15 14:07:23 -0500 |
| commit | 82ead7fe41da960ed80652d13d5a1072f85f5aca (patch) | |
| tree | b4f870c1c6ef0e66ceca68be03a8e4eb3b139e2e /fs/nfsd/vfs.c | |
| parent | 3b6cee7bc4b2f7858e9202293104acda8826bb68 (diff) | |
| download | lwn-82ead7fe41da960ed80652d13d5a1072f85f5aca.tar.gz lwn-82ead7fe41da960ed80652d13d5a1072f85f5aca.zip | |
nfsd: filter lookup results in V4ROOT case
We treat every object as a mountpoint and pretend it doesn't exist if
it isn't exported.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/nfsd/vfs.c')
| -rw-r--r-- | fs/nfsd/vfs.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 7e2fdd50113f..eaf2f0dca12a 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -166,6 +166,19 @@ static int nfsd_lookup_parent(struct svc_rqst *rqstp, struct dentry *dparent, st return 0; } +/* + * For nfsd purposes, we treat V4ROOT exports as though there was an + * export at *every* directory. + */ +static int nfsd_mountpoint(struct dentry *dentry, struct svc_export *exp) +{ + if (d_mountpoint(dentry)) + return 1; + if (!(exp->ex_flags & NFSEXP_V4ROOT)) + return 0; + return dentry->d_inode != NULL; +} + __be32 nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name, unsigned int len, @@ -211,7 +224,7 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp, /* * check if we have crossed a mount point ... */ - if (d_mountpoint(dentry)) { + if (nfsd_mountpoint(dentry, exp)) { if ((host_err = nfsd_cross_mnt(rqstp, &dentry, &exp))) { dput(dentry); goto out_nfserr; |