On Tue, 2013-01-22 at 08:40 -0500, 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 | 40 ++++++++++++++++++++++++++++++++++++++++
> include/linux/nfs4.h | 8 ++++++++
> include/linux/nfs_fs.h | 14 ++++++++++++++
> include/linux/nfs_xdr.h | 20 ++++++++++++++++++++
> 4 files changed, 82 insertions(+)
>
> diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
> index ebeb94c..761bc17 100644
> --- a/fs/nfs/inode.c
> +++ b/fs/nfs/inode.c
> @@ -255,6 +255,46 @@ nfs_init_locked(struct inode *inode, void *opaque)
> return 0;
> }
>
> +#ifdef CONFIG_NFS_V4_SECURITY_LABEL
> +struct nfs4_label *nfs4_label_alloc(gfp_t flags)
> +{
> + struct nfs4_label *label = NULL;
> +
> + label = kzalloc(sizeof(struct nfs4_label) + NFS4_MAXLABELLEN, flags);
> + if (label == NULL)
> + return NULL;
> +
> + label->label = (void *)(label + 1);
This is ugly. Why not use the more common construct of defining
struct nfs4_label {
....
char label[NFS4_MAXLABELLEN];
};
Also, note that if NFS4_MAXLABELLEN == 4096, then the actual allocation
above will result in an 8k memory slab being allocated. It would be nice
to shrink that. Do we really expect 4k label sizes?
> + label->len = NFS4_MAXLABELLEN;
> + /* 0 is the null format meaning that the data is not to be translated */
> + label->lfs = 0;
> + label->pi = 0;
If the label is allocated using kzalloc(), then the fields are trivially
initialised to '0'.
> + return label;
> +}
> +EXPORT_SYMBOL_GPL(nfs4_label_alloc);
> +
> +void nfs4_label_init(struct nfs4_label *label)
> +{
> + if (label && label->label) {
> + *(unsigned char *)label->label = 0;
> + label->len = NFS4_MAXLABELLEN;
Is this the length of the label or of the buffer? If the latter, do we
really need that, given that the size is a constant?
> + /* 0 is the null format meaning that the data is not
> + to be translated */
> + label->lfs = 0;
> + label->pi = 0;
> + }
> + return;
> +}
> +EXPORT_SYMBOL_GPL(nfs4_label_init);
> +
> +void nfs4_label_free(struct nfs4_label *label)
> +{
> + kfree(label);
> + return;
> +}
> +EXPORT_SYMBOL_GPL(nfs4_label_free);
> +#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..862471f 100644
> --- a/include/linux/nfs4.h
> +++ b/include/linux/nfs4.h
> @@ -28,6 +28,14 @@ struct nfs4_acl {
> struct nfs4_ace aces[0];
> };
>
> +struct nfs4_label {
> + uint32_t lfs;
> + uint32_t pi;
> + u32 len;
> + void *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..f745f2c 100644
> --- a/include/linux/nfs_fs.h
> +++ b/include/linux/nfs_fs.h
> @@ -489,6 +489,20 @@ 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(gfp_t flags);
> +extern void nfs4_label_init(struct nfs4_label *);
> +extern void nfs4_label_free(struct nfs4_label *);
> +#else
> +static inline struct nfs4_label *nfs4_label_alloc(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 fac114d..0b79127 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;
Err... Is this needed? I couldn't find any code that uses it...
Ditto on most of the struct nfs4_*args declarations, and several of the
struct nfs4_*res too...
> 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;
> };
>
> /*
> @@ -632,6 +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 {
> @@ -667,6 +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;
> };
>
> @@ -712,6 +724,7 @@ struct nfs3_setaclargs {
> struct nfs_diropok {
> struct nfs_fh * fh;
> struct nfs_fattr * fattr;
> + struct nfs4_label *label;
> };
>
> struct nfs_readlinkargs {
> @@ -842,6 +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;
> };
> @@ -864,6 +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 {
> @@ -871,6 +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;
> };
>
> @@ -895,6 +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 {
> @@ -909,8 +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;
> };
>
>
> @@ -926,6 +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 {
--
Trond Myklebust
Linux NFS client maintainer
NetApp
Trond.Myklebust@xxxxxxxxxx
www.netapp.com
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