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NFSv4: Introduce new label structure

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In order to mimic the way that NFSv4 ACLs are implemented we have created a
structure to be used to pass label data up and down the call chain. This patch
adds the new structure and new members to the required NFSv4 call structures.

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: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Steve Dickson 2013-05-22 12:50:40 -04:00 committed by Trond Myklebust
parent e64a4210f6
commit e058f70b80
4 changed files with 65 additions and 0 deletions
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28
fs/nfs/inode.c
View File

@ -257,6 +257,34 @@ nfs_init_locked(struct inode *inode, void *opaque)
return 0;
}
#ifdef CONFIG_NFS_V4_SECURITY_LABEL
struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
{
struct nfs4_label *label = NULL;
int minor_version = server->nfs_client->cl_minorversion;
if (minor_version < 2)
return label;
if (!(server->caps & NFS_CAP_SECURITY_LABEL))
return label;
label = kzalloc(sizeof(struct nfs4_label), flags);
if (label == NULL)
return ERR_PTR(-ENOMEM);
label->label = kzalloc(NFS4_MAXLABELLEN, flags);
if (label->label == NULL) {
kfree(label);
return ERR_PTR(-ENOMEM);
}
label->len = NFS4_MAXLABELLEN;
return label;
}
EXPORT_SYMBOL_GPL(nfs4_label_alloc);
#endif
/*
* This is our front-end to iget that looks up inodes by file handle
* instead of inode number.

9
include/linux/nfs4.h
View File

@ -32,6 +32,15 @@ struct nfs4_acl {
struct nfs4_ace aces[0];
};
#define NFS4_MAXLABELLEN 2048
struct nfs4_label {
uint32_t lfs;
uint32_t pi;
u32 len;
char *label;
};
typedef struct { char data[NFS4_VERIFIER_SIZE]; } nfs4_verifier;
struct nfs_stateid4 {

18
include/linux/nfs_fs.h
View File

@ -496,6 +496,24 @@ extern const struct inode_operations nfs_referral_inode_operations;
extern int nfs_mountpoint_expiry_timeout;
extern void nfs_release_automount_timer(void);
/*
* linux/fs/nfs/nfs4proc.c
*/
#ifdef CONFIG_NFS_V4_SECURITY_LABEL
extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
static inline void nfs4_label_free(struct nfs4_label *label)
{
if (label) {
kfree(label->label);
kfree(label);
}
return;
}
#else
static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
static inline void nfs4_label_free(void *label) {}
#endif
/*
* linux/fs/nfs/unlink.c
*/

10
include/linux/nfs_xdr.h
View File

@ -349,6 +349,7 @@ struct nfs_openargs {
const u32 * open_bitmap;
__u32 claim;
enum createmode4 createmode;
const struct nfs4_label *label;
};
struct nfs_openres {
@ -358,6 +359,7 @@ struct nfs_openres {
struct nfs4_change_info cinfo;
__u32 rflags;
struct nfs_fattr * f_attr;
struct nfs4_label *f_label;
struct nfs_seqid * seqid;
const struct nfs_server *server;
fmode_t delegation_type;
@ -600,6 +602,7 @@ struct nfs_entry {
int eof;
struct nfs_fh * fh;
struct nfs_fattr * fattr;
struct nfs4_label *label;
unsigned char d_type;
struct nfs_server * server;
};
@ -632,6 +635,7 @@ struct nfs_setattrargs {
struct iattr * iap;
const struct nfs_server * server; /* Needed for name mapping */
const u32 * bitmask;
const struct nfs4_label *label;
};
struct nfs_setaclargs {
@ -667,6 +671,7 @@ struct nfs_getaclres {
struct nfs_setattrres {
struct nfs4_sequence_res seq_res;
struct nfs_fattr * fattr;
struct nfs4_label *label;
const struct nfs_server * server;
};
@ -864,6 +869,7 @@ struct nfs4_create_arg {
const struct iattr * attrs;
const struct nfs_fh * dir_fh;
const u32 * bitmask;
const struct nfs4_label *label;
};
struct nfs4_create_res {
@ -871,6 +877,7 @@ struct nfs4_create_res {
const struct nfs_server * server;
struct nfs_fh * fh;
struct nfs_fattr * fattr;
struct nfs4_label *label;
struct nfs4_change_info dir_cinfo;
};
@ -895,6 +902,7 @@ struct nfs4_getattr_res {
struct nfs4_sequence_res seq_res;
const struct nfs_server * server;
struct nfs_fattr * fattr;
struct nfs4_label *label;
};
struct nfs4_link_arg {
@ -909,6 +917,7 @@ struct nfs4_link_res {
struct nfs4_sequence_res seq_res;
const struct nfs_server * server;
struct nfs_fattr * fattr;
struct nfs4_label *label;
struct nfs4_change_info cinfo;
struct nfs_fattr * dir_attr;
};
@ -926,6 +935,7 @@ struct nfs4_lookup_res {
const struct nfs_server * server;
struct nfs_fattr * fattr;
struct nfs_fh * fh;
struct nfs4_label *label;
};
struct nfs4_lookup_root_arg {