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| author | David Quigley <dpquigl@davequigley.com> | 2013-05-02 17:19:10 (GMT) |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-05-15 13:27:02 (GMT) |
| commit | 18032ca062e621e15683cb61c066ef3dc5414a7b (patch) | |
| tree | 18b061105452a5d47a85c0f693a151227ff3c02c /fs/nfsd/nfs4proc.c | |
| parent | 4bdc33ed5bd9fbaa243bda6fdccb22674aed6305 (diff) | |
| download | linux-18032ca062e621e15683cb61c066ef3dc5414a7b.tar.xz | |
NFSD: Server implementation of MAC Labeling
Implement labeled NFS on the server: encoding and decoding, and writing
and reading, of file labels.
Enabled with CONFIG_NFSD_V4_SECURITY_LABEL.
Signed-off-by: Matthew N. Dodd <Matthew.Dodd@sparta.com>
Signed-off-by: Miguel Rodel Felipe <Rodel_FM@dsi.a-star.edu.sg>
Signed-off-by: Phua Eu Gene <PHUA_Eu_Gene@dsi.a-star.edu.sg>
Signed-off-by: Khin Mi Mi Aung <Mi_Mi_AUNG@dsi.a-star.edu.sg>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/nfs4proc.c')
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 27d74a2..1a1ff24 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -42,6 +42,36 @@ #include "current_stateid.h" #include "netns.h" +#ifdef CONFIG_NFSD_V4_SECURITY_LABEL +#include <linux/security.h> + +static inline void +nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) +{ + struct inode *inode = resfh->fh_dentry->d_inode; + int status; + + mutex_lock(&inode->i_mutex); + status = security_inode_setsecctx(resfh->fh_dentry, + label->data, label->len); + mutex_unlock(&inode->i_mutex); + + if (status) + /* + * XXX: We should really fail the whole open, but we may + * already have created a new file, so it may be too + * late. For now this seems the least of evils: + */ + bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; + + return; +} +#else +static inline void +nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) +{ } +#endif + #define NFSDDBG_FACILITY NFSDDBG_PROC static u32 nfsd_attrmask[] = { @@ -239,6 +269,9 @@ do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, stru (u32 *)open->op_verf.data, &open->op_truncate, &open->op_created); + if (!status && open->op_label.len) + nfsd4_security_inode_setsecctx(resfh, &open->op_label, open->op_bmval); + /* * Following rfc 3530 14.2.16, use the returned bitmask * to indicate which attributes we used to store the @@ -637,6 +670,9 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (status) goto out; + if (create->cr_label.len) + nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); + if (create->cr_acl != NULL) do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, create->cr_bmval); @@ -916,6 +952,11 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, setattr->sa_acl); if (status) goto out; + if (setattr->sa_label.len) + status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, + &setattr->sa_label); + if (status) + goto out; status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 0, (time_t)0); out: |