From: David Quigley <dpquigl@xxxxxxxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Miguel Rodel Felipe <Rodel_FM@xxxxxxxxxxxxxxxxx>
Signed-off-by: Phua Eu Gene <PHUA_Eu_Gene@xxxxxxxxxxxxxxxxx>
Signed-off-by: Khin Mi Mi Aung <Mi_Mi_AUNG@xxxxxxxxxxxxxxxxx>
---
fs/nfs/inode.c | 33 +++++++++++++++++++++++++++++++++
include/linux/nfs4.h | 7 +++++++
include/linux/nfs_fs.h | 17 +++++++++++++++++
include/linux/nfs_xdr.h | 21 +++++++++++++++++++++
include/uapi/linux/nfs4.h | 2 +-
5 files changed, 79 insertions(+), 1 deletion(-)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index ebeb94c..8d5f01b 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -255,6 +255,39 @@ 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;
+
+ if (!(server->caps & NFS_CAP_SECURITY_LABEL))
+ return label;
+
+ label = kzalloc(NFS4_MAXLABELLEN, flags);
+ if (label == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ label->label = (char *)(label + 1);
+ label->len = NFS4_MAXLABELLEN;
+
+ return label;
+}
+EXPORT_SYMBOL_GPL(nfs4_label_alloc);
+
+void nfs4_label_init(struct nfs4_label *label)
+{
+ if (label && label->label) {
+ /* 0 is the null format meaning that the data is not
+ to be translated */
+ label->lfs = 0;
+ label->pi = 0;
+ label->len = NFS4_MAXLABELLEN;
+ }
+ return;
+}
+EXPORT_SYMBOL_GPL(nfs4_label_init);
+#endif
+
/*
* This is our front-end to iget that looks up inodes by file handle
* instead of inode number.
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index f9235b4..aab8bd8 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -28,6 +28,13 @@ struct nfs4_acl {
struct nfs4_ace aces[0];
};
+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 {
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 1cc2568..1c55373 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -489,6 +489,23 @@ 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);
+extern void nfs4_label_init(struct nfs4_label *label);
+static inline void nfs4_label_free(struct nfs4_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_init(void *label) {}
+static inline void nfs4_label_free(void *label) {}
+#endif
+
+/*
* linux/fs/nfs/unlink.c
*/
extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index ac9ba69..7e86290 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -350,6 +350,7 @@ struct nfs_openargs {
const u32 * bitmask;
const u32 * open_bitmap;
__u32 claim;
+ const struct nfs4_label *label;
};
struct nfs_openres {
@@ -359,6 +360,7 @@ 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;
@@ -403,6 +405,7 @@ struct nfs_closeres {
struct nfs4_sequence_res seq_res;
nfs4_stateid stateid;
struct nfs_fattr * fattr;
+ struct nfs4_label *label;
struct nfs_seqid * seqid;
const struct nfs_server *server;
};
@@ -476,6 +479,7 @@ struct nfs4_delegreturnargs {
struct nfs4_delegreturnres {
struct nfs4_sequence_res seq_res;
struct nfs_fattr * fattr;
+ struct nfs4_label *label;
const struct nfs_server *server;
};
@@ -496,6 +500,7 @@ struct nfs_readargs {
struct nfs_readres {
struct nfs4_sequence_res seq_res;
struct nfs_fattr * fattr;
+ struct nfs4_label *label;
__u32 count;
int eof;
};
@@ -564,6 +569,7 @@ struct nfs_removeres {
struct nfs4_sequence_res seq_res;
const struct nfs_server *server;
struct nfs_fattr *dir_attr;
+ struct nfs4_label *dir_label;
struct nfs4_change_info cinfo;
};
@@ -576,6 +582,8 @@ struct nfs_renameargs {
const struct nfs_fh *new_dir;
const struct qstr *old_name;
const struct qstr *new_name;
+ const struct nfs4_label *old_label;
+ const struct nfs4_label *new_label;
};
struct nfs_renameres {
@@ -583,8 +591,10 @@ struct nfs_renameres {
const struct nfs_server *server;
struct nfs4_change_info old_cinfo;
struct nfs_fattr *old_fattr;
+ struct nfs4_label *old_label;
struct nfs4_change_info new_cinfo;
struct nfs_fattr *new_fattr;
+ struct nfs4_label *new_label;
};
/*
@@ -599,6 +609,7 @@ 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;
};
@@ -631,6 +642,7 @@ 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 {
@@ -666,6 +678,7 @@ 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;
};
@@ -711,6 +724,7 @@ struct nfs3_setaclargs {
struct nfs_diropok {
struct nfs_fh * fh;
struct nfs_fattr * fattr;
+ struct nfs4_label *label;
};
struct nfs_readlinkargs {
@@ -841,6 +855,7 @@ struct nfs4_accessres {
struct nfs4_sequence_res seq_res;
const struct nfs_server * server;
struct nfs_fattr * fattr;
+ struct nfs4_label *label;
u32 supported;
u32 access;
};
@@ -863,6 +878,7 @@ 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 {
@@ -870,6 +886,7 @@ 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;
};
@@ -894,6 +911,7 @@ 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 {
@@ -908,8 +926,10 @@ 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;
+ struct nfs4_label *dir_label;
};
@@ -925,6 +945,7 @@ 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 {
diff --git a/include/uapi/linux/nfs4.h b/include/uapi/linux/nfs4.h
index 788128e..b8014a2 100644
--- a/include/uapi/linux/nfs4.h
+++ b/include/uapi/linux/nfs4.h
@@ -25,7 +25,7 @@
#define NFS4_MAXNAMLEN NAME_MAX
#define NFS4_OPAQUE_LIMIT 1024
#define NFS4_MAX_SESSIONID_LEN 16
-
+#define NFS4_MAXLABELLEN (4095 - offsetof(struct nfs4_label , label))
#define NFS4_ACCESS_READ 0x0001
#define NFS4_ACCESS_LOOKUP 0x0002
#define NFS4_ACCESS_MODIFY 0x0004
--
1.7.11.7
--
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