On Thu, Mar 28, 2013 at 09:53:57AM -0400, Steve Dickson wrote:
> 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 | 24 ++++++++++++++++++++++++
> include/linux/nfs4.h | 7 +++++++
> include/linux/nfs_fs.h | 18 ++++++++++++++++++
> include/linux/nfs_xdr.h | 21 +++++++++++++++++++++
> include/uapi/linux/nfs4.h | 2 +-
> 5 files changed, 71 insertions(+), 1 deletion(-)
>
> diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
> index 1f94167..dc85ab3 100644
> --- a/fs/nfs/inode.c
> +++ b/fs/nfs/inode.c
> @@ -257,6 +257,30 @@ 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(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;
So on getting a label the xdr decoder copies into this preallocated
label->label, and on setting one we declare a struct nfs4_label on the
stack and initialize it to point to the label we were called with. And
NFS4_MAXLABELLEN is now down to 128. OK.
--b.
> +
> + 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.
> diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
> index 0fa29f4..650a678 100644
> --- a/include/linux/nfs4.h
> +++ b/include/linux/nfs4.h
> @@ -32,6 +32,13 @@ 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..e0e1806 100644
> --- a/include/linux/nfs_fs.h
> +++ b/include/linux/nfs_fs.h
> @@ -489,6 +489,24 @@ 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
> */
> 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 9f2dba3..4d2fdf6 100644
> --- a/include/linux/nfs_xdr.h
> +++ b/include/linux/nfs_xdr.h
> @@ -351,6 +351,7 @@ struct nfs_openargs {
> const u32 * bitmask;
> const u32 * open_bitmap;
> __u32 claim;
> + const struct nfs4_label *label;
> };
>
> struct nfs_openres {
> @@ -360,6 +361,7 @@ 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;
> @@ -404,6 +406,7 @@ 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;
> };
> @@ -477,6 +480,7 @@ 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;
> };
>
> @@ -497,6 +501,7 @@ struct nfs_readargs {
> struct nfs_readres {
> struct nfs4_sequence_res seq_res;
> struct nfs_fattr * fattr;
> + struct nfs4_label *label;
> __u32 count;
> int eof;
> };
> @@ -565,6 +570,7 @@ 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;
> };
>
> @@ -577,6 +583,8 @@ 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 {
> @@ -584,8 +592,10 @@ 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;
> };
>
> /*
> @@ -600,6 +610,7 @@ 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 +643,7 @@ 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 +679,7 @@ 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;
> };
>
> @@ -712,6 +725,7 @@ struct nfs3_setaclargs {
> struct nfs_diropok {
> struct nfs_fh * fh;
> struct nfs_fattr * fattr;
> + struct nfs4_label *label;
> };
>
> struct nfs_readlinkargs {
> @@ -842,6 +856,7 @@ 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;
> };
> @@ -864,6 +879,7 @@ 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 +887,7 @@ 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 +912,7 @@ 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 {
> @@ -909,8 +927,10 @@ 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;
> };
>
>
> @@ -926,6 +946,7 @@ 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..19a7b6d 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 128
> #define NFS4_ACCESS_READ 0x0001
> #define NFS4_ACCESS_LOOKUP 0x0002
> #define NFS4_ACCESS_MODIFY 0x0004
> --
> 1.8.1.4
>
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