Commit 95d871f0 authored by Anna Schumaker's avatar Anna Schumaker Committed by J. Bruce Fields
Browse files

nfsd: Add ALLOCATE support 



The ALLOCATE operation is used to preallocate space in a file.  I can do
this by using vfs_fallocate() to do the actual preallocation.

ALLOCATE only returns a status indicator, so we don't need to write a
special encode() function.

Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent 72c72bdf

fs/nfsd/nfs4proc.c

+36 −0
Original line number Diff line number Diff line
@@ -1013,6 +1013,36 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 
	return status;

}



static __be32

nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,

		struct nfsd4_fallocate *fallocate, int flags)

{

	__be32 status = nfserr_notsupp;

	struct file *file;



	status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,

					    &fallocate->falloc_stateid,

					    WR_STATE, &file);

	if (status != nfs_ok) {

		dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");

		return status;

	}



	status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,

				     fallocate->falloc_offset,

				     fallocate->falloc_length,

				     flags);

	fput(file);

	return status;

}



static __be32

nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,

	       struct nfsd4_fallocate *fallocate)

{

	return nfsd4_fallocate(rqstp, cstate, fallocate, 0);

}



static __be32

nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,

		struct nfsd4_seek *seek)
@@ -1929,6 +1959,12 @@ static struct nfsd4_operation nfsd4_ops[] = { 
	},



	/* NFSv4.2 operations */

	[OP_ALLOCATE] = {

		.op_func = (nfsd4op_func)nfsd4_allocate,

		.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,

		.op_name = "OP_ALLOCATE",

		.op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,

	},

	[OP_SEEK] = {

		.op_func = (nfsd4op_func)nfsd4_seek,

		.op_name = "OP_SEEK",

fs/nfsd/nfs4xdr.c

+18 −1
Original line number Diff line number Diff line
@@ -1513,6 +1513,23 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str 
	DECODE_TAIL;

}



static __be32

nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,

		       struct nfsd4_fallocate *fallocate)

{

	DECODE_HEAD;



	status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);

	if (status)

		return status;



	READ_BUF(16);

	p = xdr_decode_hyper(p, &fallocate->falloc_offset);

	xdr_decode_hyper(p, &fallocate->falloc_length);



	DECODE_TAIL;

}



static __be32

nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)

{
@@ -1604,7 +1621,7 @@ static nfsd4_dec nfsd4_dec_ops[] = { 
	[OP_RECLAIM_COMPLETE]	= (nfsd4_dec)nfsd4_decode_reclaim_complete,



	/* new operations for NFSv4.2 */

	[OP_ALLOCATE]		= (nfsd4_dec)nfsd4_decode_notsupp,

	[OP_ALLOCATE]		= (nfsd4_dec)nfsd4_decode_fallocate,

	[OP_COPY]		= (nfsd4_dec)nfsd4_decode_notsupp,

	[OP_COPY_NOTIFY]	= (nfsd4_dec)nfsd4_decode_notsupp,

	[OP_DEALLOCATE]		= (nfsd4_dec)nfsd4_decode_notsupp,

fs/nfsd/vfs.c

+21 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include <linux/fs.h>

#include <linux/file.h>

#include <linux/splice.h>

#include <linux/falloc.h>

#include <linux/fcntl.h>

#include <linux/namei.h>

#include <linux/delay.h>
@@ -533,6 +534,26 @@ __be32 nfsd4_set_nfs4_label(struct svc_rqst *rqstp, struct svc_fh *fhp, 
}

#endif



__be32 nfsd4_vfs_fallocate(struct svc_rqst *rqstp, struct svc_fh *fhp,

			   struct file *file, loff_t offset, loff_t len,

			   int flags)

{

	__be32 err;

	int error;



	if (!S_ISREG(file_inode(file)->i_mode))

		return nfserr_inval;



	err = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, NFSD_MAY_WRITE);

	if (err)

		return err;



	error = vfs_fallocate(file, flags, offset, len);

	if (!error)

		error = commit_metadata(fhp);



	return nfserrno(error);

}

#endif /* defined(CONFIG_NFSD_V4) */



#ifdef CONFIG_NFSD_V3

fs/nfsd/vfs.h

+2 −0
Original line number Diff line number Diff line
@@ -54,6 +54,8 @@ int nfsd_mountpoint(struct dentry *, struct svc_export *); 
#ifdef CONFIG_NFSD_V4

__be32          nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,

		    struct xdr_netobj *);

__be32		nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,

				    struct file *, loff_t, loff_t, int);

#endif /* CONFIG_NFSD_V4 */

__be32		nfsd_create(struct svc_rqst *, struct svc_fh *,

				char *name, int len, struct iattr *attrs,

fs/nfsd/xdr4.h

+8 −0
Original line number Diff line number Diff line
@@ -428,6 +428,13 @@ struct nfsd4_reclaim_complete { 
	u32 rca_one_fs;

};



struct nfsd4_fallocate {

	/* request */

	stateid_t	falloc_stateid;

	loff_t		falloc_offset;

	u64		falloc_length;

};



struct nfsd4_seek {

	/* request */

	stateid_t	seek_stateid;
@@ -486,6 +493,7 @@ struct nfsd4_op { 
		struct nfsd4_free_stateid	free_stateid;



		/* NFSv4.2 */

		struct nfsd4_fallocate		allocate;

		struct nfsd4_seek		seek;

	} u;

	struct nfs4_replay *			replay;

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