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nfsd: minor nfsd_setattr cleanup

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Simplify exit paths, size_change use.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Christoph Hellwig 2017-02-20 17:04:42 -05:00 committed by J. Bruce Fields
parent 60709c093e
commit 758e99fefe
1 changed files with 12 additions and 17 deletions
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29
fs/nfsd/vfs.c
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@ -377,7 +377,7 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
__be32 err;
int host_err;
bool get_write_count;
int size_change = 0;
bool size_change = (iap->ia_valid & ATTR_SIZE);
if (iap->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_SIZE))
accmode |= NFSD_MAY_WRITE|NFSD_MAY_OWNER_OVERRIDE;
@ -390,11 +390,11 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
/* Get inode */
err = fh_verify(rqstp, fhp, ftype, accmode);
if (err)
goto out;
return err;
if (get_write_count) {
host_err = fh_want_write(fhp);
if (host_err)
return nfserrno(host_err);
goto out;
}
dentry = fhp->fh_dentry;
@ -405,19 +405,21 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
iap->ia_valid &= ~ATTR_MODE;
if (!iap->ia_valid)
goto out;
return 0;
nfsd_sanitize_attrs(inode, iap);
if (check_guard && guardtime != inode->i_ctime.tv_sec)
return nfserr_notsync;
/*
* The size case is special, it changes the file in addition to the
* attributes.
*/
if (iap->ia_valid & ATTR_SIZE) {
if (size_change) {
err = nfsd_get_write_access(rqstp, fhp, iap);
if (err)
goto out;
size_change = 1;
return err;
/*
* RFC5661, Section 18.30.4:
@ -432,23 +434,16 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
iap->ia_valid |= ATTR_CTIME;
if (check_guard && guardtime != inode->i_ctime.tv_sec) {
err = nfserr_notsync;
goto out_put_write_access;
}
fh_lock(fhp);
host_err = notify_change(dentry, iap, NULL);
fh_unlock(fhp);
err = nfserrno(host_err);
out_put_write_access:
if (size_change)
put_write_access(inode);
if (!err)
err = nfserrno(commit_metadata(fhp));
out:
return err;
if (!host_err)
host_err = commit_metadata(fhp);
return nfserrno(host_err);
}
#if defined(CONFIG_NFSD_V4)