From 95d871f03cae6b49de040265cf88cbe2a16b9f05 Mon Sep 17 00:00:00 2001 From: Anna Schumaker Date: Fri, 7 Nov 2014 14:44:26 -0500 Subject: [PATCH] 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: Anna Schumaker Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4proc.c | 36 ++++++++++++++++++++++++++++++++++++ fs/nfsd/nfs4xdr.c | 19 ++++++++++++++++++- fs/nfsd/vfs.c | 21 +++++++++++++++++++++ fs/nfsd/vfs.h | 2 ++ fs/nfsd/xdr4.h | 8 ++++++++ 5 files changed, 85 insertions(+), 1 deletion(-) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 0beb023f25ac..a261f1800922 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -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", diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index eeea7a90eb87..a60cff86fc28 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -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, diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index d16076bd9a7a..f1999619d516 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -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 diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h index c2ff3f14e5f6..7ffdb144e486 100644 --- a/fs/nfsd/vfs.h +++ b/fs/nfsd/vfs.h @@ -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, diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index 5720e9457f33..eeaa0d0c4f79 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -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;