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[PATCH] knfsd: check error status from vfs_getattr and i_op->fsync

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Both vfs_getattr and i_op->fsync return error statuses which nfsd was
largely ignoring.  This as noticed when exporting directories using fuse.

This patch cleans up most of the offences, which involves moving the call
to vfs_getattr out of the xdr encoding routines (where it is too late to
report an error) into the main NFS procedure handling routines.

There is still a called to vfs_gettattr (related to the ACL code) where the
status is ignored, and called to nfsd_sync_dir don't check return status
either.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
David Shaw 2006-01-06 00:19:58 -08:00 committed by Linus Torvalds
parent 93fbf1a5de
commit a334de2866
6 changed files with 75 additions and 55 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
fs/nfsd/nfs3proc.c
View file

@ -56,13 +56,20 @@ static int
nfsd3_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp,
struct nfsd3_attrstat *resp)
{
int nfserr;
int err, nfserr;
dprintk("nfsd: GETATTR(3) %s\n",
SVCFH_fmt(&argp->fh));
fh_copy(&resp->fh, &argp->fh);
nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
if (nfserr)
RETURN_STATUS(nfserr);
err = vfs_getattr(resp->fh.fh_export->ex_mnt,
resp->fh.fh_dentry, &resp->stat);
nfserr = nfserrno(err);
RETURN_STATUS(nfserr);
}

45
fs/nfsd/nfs3xdr.c
View file

@ -154,37 +154,34 @@ decode_sattr3(u32 *p, struct iattr *iap)
}
static inline u32 *
encode_fattr3(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
encode_fattr3(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp,
struct kstat *stat)
{
struct vfsmount *mnt = fhp->fh_export->ex_mnt;
struct dentry *dentry = fhp->fh_dentry;
struct kstat stat;
struct timespec time;
vfs_getattr(mnt, dentry, &stat);
*p++ = htonl(nfs3_ftypes[(stat.mode & S_IFMT) >> 12]);
*p++ = htonl((u32) stat.mode);
*p++ = htonl((u32) stat.nlink);
*p++ = htonl((u32) nfsd_ruid(rqstp, stat.uid));
*p++ = htonl((u32) nfsd_rgid(rqstp, stat.gid));
if (S_ISLNK(stat.mode) && stat.size > NFS3_MAXPATHLEN) {
*p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
*p++ = htonl((u32) stat->mode);
*p++ = htonl((u32) stat->nlink);
*p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
*p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
} else {
p = xdr_encode_hyper(p, (u64) stat.size);
p = xdr_encode_hyper(p, (u64) stat->size);
}
p = xdr_encode_hyper(p, ((u64)stat.blocks) << 9);
*p++ = htonl((u32) MAJOR(stat.rdev));
*p++ = htonl((u32) MINOR(stat.rdev));
p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
*p++ = htonl((u32) MAJOR(stat->rdev));
*p++ = htonl((u32) MINOR(stat->rdev));
if (is_fsid(fhp, rqstp->rq_reffh))
p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
else
p = xdr_encode_hyper(p, (u64) huge_encode_dev(stat.dev));
p = xdr_encode_hyper(p, (u64) stat.ino);
p = encode_time3(p, &stat.atime);
p = xdr_encode_hyper(p, (u64) huge_encode_dev(stat->dev));
p = xdr_encode_hyper(p, (u64) stat->ino);
p = encode_time3(p, &stat->atime);
lease_get_mtime(dentry->d_inode, &time);
p = encode_time3(p, &time);
p = encode_time3(p, &stat.ctime);
p = encode_time3(p, &stat->ctime);
return p;
}
@ -232,8 +229,14 @@ encode_post_op_attr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
{
struct dentry *dentry = fhp->fh_dentry;
if (dentry && dentry->d_inode != NULL) {
int err;
struct kstat stat;
err = vfs_getattr(fhp->fh_export->ex_mnt, dentry, &stat);
if (!err) {
*p++ = xdr_one; /* attributes follow */
return encode_fattr3(rqstp, p, fhp);
return encode_fattr3(rqstp, p, fhp, &stat);
}
}
*p++ = xdr_zero;
return p;
@ -616,7 +619,7 @@ nfs3svc_encode_attrstat(struct svc_rqst *rqstp, u32 *p,
struct nfsd3_attrstat *resp)
{
if (resp->status == 0)
p = encode_fattr3(rqstp, p, &resp->fh);
p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat);
return xdr_ressize_check(rqstp, p);
}

48
fs/nfsd/nfsxdr.c
View file

@ -152,46 +152,44 @@ decode_sattr(u32 *p, struct iattr *iap)
}
static inline u32 *
encode_fattr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
encode_fattr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp,
struct kstat *stat)
{
struct vfsmount *mnt = fhp->fh_export->ex_mnt;
struct dentry *dentry = fhp->fh_dentry;
struct kstat stat;
int type;
struct timespec time;
vfs_getattr(mnt, dentry, &stat);
type = (stat.mode & S_IFMT);
type = (stat->mode & S_IFMT);
*p++ = htonl(nfs_ftypes[type >> 12]);
*p++ = htonl((u32) stat.mode);
*p++ = htonl((u32) stat.nlink);
*p++ = htonl((u32) nfsd_ruid(rqstp, stat.uid));
*p++ = htonl((u32) nfsd_rgid(rqstp, stat.gid));
*p++ = htonl((u32) stat->mode);
*p++ = htonl((u32) stat->nlink);
*p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
*p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
if (S_ISLNK(type) && stat.size > NFS_MAXPATHLEN) {
if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
*p++ = htonl(NFS_MAXPATHLEN);
} else {
*p++ = htonl((u32) stat.size);
*p++ = htonl((u32) stat->size);
}
*p++ = htonl((u32) stat.blksize);
*p++ = htonl((u32) stat->blksize);
if (S_ISCHR(type) || S_ISBLK(type))
*p++ = htonl(new_encode_dev(stat.rdev));
*p++ = htonl(new_encode_dev(stat->rdev));
else
*p++ = htonl(0xffffffff);
*p++ = htonl((u32) stat.blocks);
*p++ = htonl((u32) stat->blocks);
if (is_fsid(fhp, rqstp->rq_reffh))
*p++ = htonl((u32) fhp->fh_export->ex_fsid);
else
*p++ = htonl(new_encode_dev(stat.dev));
*p++ = htonl((u32) stat.ino);
*p++ = htonl((u32) stat.atime.tv_sec);
*p++ = htonl(stat.atime.tv_nsec ? stat.atime.tv_nsec / 1000 : 0);
*p++ = htonl(new_encode_dev(stat->dev));
*p++ = htonl((u32) stat->ino);
*p++ = htonl((u32) stat->atime.tv_sec);
*p++ = htonl(stat->atime.tv_nsec ? stat->atime.tv_nsec / 1000 : 0);
lease_get_mtime(dentry->d_inode, &time);
*p++ = htonl((u32) time.tv_sec);
*p++ = htonl(time.tv_nsec ? time.tv_nsec / 1000 : 0);
*p++ = htonl((u32) stat.ctime.tv_sec);
*p++ = htonl(stat.ctime.tv_nsec ? stat.ctime.tv_nsec / 1000 : 0);
*p++ = htonl((u32) stat->ctime.tv_sec);
*p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0);
return p;
}
@ -199,7 +197,9 @@ encode_fattr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
/* Helper function for NFSv2 ACL code */
u32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
{
return encode_fattr(rqstp, p, fhp);
struct kstat stat;
vfs_getattr(fhp->fh_export->ex_mnt, fhp->fh_dentry, &stat);
return encode_fattr(rqstp, p, fhp, &stat);
}
/*
@ -394,7 +394,7 @@ int
nfssvc_encode_attrstat(struct svc_rqst *rqstp, u32 *p,
struct nfsd_attrstat *resp)
{
p = encode_fattr(rqstp, p, &resp->fh);
p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
return xdr_ressize_check(rqstp, p);
}
@ -403,7 +403,7 @@ nfssvc_encode_diropres(struct svc_rqst *rqstp, u32 *p,
struct nfsd_diropres *resp)
{
p = encode_fh(p, &resp->fh);
p = encode_fattr(rqstp, p, &resp->fh);
p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
return xdr_ressize_check(rqstp, p);
}
@ -428,7 +428,7 @@ int
nfssvc_encode_readres(struct svc_rqst *rqstp, u32 *p,
struct nfsd_readres *resp)
{
p = encode_fattr(rqstp, p, &resp->fh);
p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
*p++ = htonl(resp->count);
xdr_ressize_check(rqstp, p);

18
fs/nfsd/vfs.c
View file

@ -717,27 +717,33 @@ nfsd_close(struct file *filp)
* As this calls fsync (not fdatasync) there is no need for a write_inode
* after it.
*/
static inline void nfsd_dosync(struct file *filp, struct dentry *dp,
static inline int nfsd_dosync(struct file *filp, struct dentry *dp,
struct file_operations *fop)
{
struct inode *inode = dp->d_inode;
int (*fsync) (struct file *, struct dentry *, int);
int err = nfs_ok;
filemap_fdatawrite(inode->i_mapping);
if (fop && (fsync = fop->fsync))
fsync(filp, dp, 0);
err=fsync(filp, dp, 0);
filemap_fdatawait(inode->i_mapping);
return nfserrno(err);
}
static void
static int
nfsd_sync(struct file *filp)
{
int err;
struct inode *inode = filp->f_dentry->d_inode;
dprintk("nfsd: sync file %s\n", filp->f_dentry->d_name.name);
down(&inode->i_sem);
nfsd_dosync(filp, filp->f_dentry, filp->f_op);
err=nfsd_dosync(filp, filp->f_dentry, filp->f_op);
up(&inode->i_sem);
return err;
}
void
@ -962,7 +968,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
if (inode->i_state & I_DIRTY) {
dprintk("nfsd: write sync %d\n", current->pid);
nfsd_sync(file);
err=nfsd_sync(file);
}
#if 0
wake_up(&inode->i_wait);
@ -1066,7 +1072,7 @@ nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp,
return err;
if (EX_ISSYNC(fhp->fh_export)) {
if (file->f_op && file->f_op->fsync) {
nfsd_sync(file);
err = nfsd_sync(file);
} else {
err = nfserr_notsupp;
}

3
include/linux/nfsd/xdr.h
View file

@ -88,10 +88,12 @@ struct nfsd_readdirargs {
struct nfsd_attrstat {
struct svc_fh fh;
struct kstat stat;
};
struct nfsd_diropres {
struct svc_fh fh;
struct kstat stat;
};
struct nfsd_readlinkres {
@ -101,6 +103,7 @@ struct nfsd_readlinkres {
struct nfsd_readres {
struct svc_fh fh;
unsigned long count;
struct kstat stat;
};
struct nfsd_readdirres {

1
include/linux/nfsd/xdr3.h
View file

@ -126,6 +126,7 @@ struct nfsd3_setaclargs {
struct nfsd3_attrstat {
__u32 status;
struct svc_fh fh;
struct kstat stat;
};
/* LOOKUP, CREATE, MKDIR, SYMLINK, MKNOD */