* @rqstp: controlling RPC transaction
* @fhp: filehandle of target
* @attr: attributes to set
- * @check_guard: set to 1 if guardtime is a valid timestamp
* @guardtime: do not act if ctime.tv_sec does not match this timestamp
*
* This call may adjust the contents of @attr (in particular, this
*/
__be32
nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
- struct nfsd_attrs *attr,
- int check_guard, time64_t guardtime)
+ struct nfsd_attrs *attr, const struct timespec64 *guardtime)
{
struct dentry *dentry;
struct inode *inode;
int accmode = NFSD_MAY_SATTR;
umode_t ftype = 0;
__be32 err;
- int host_err;
+ int host_err = 0;
bool get_write_count;
bool size_change = (iap->ia_valid & ATTR_SIZE);
int retries;
nfsd_sanitize_attrs(inode, iap);
- if (check_guard && guardtime != inode_get_ctime_sec(inode))
- return nfserr_notsync;
-
/*
* The size case is special, it changes the file in addition to the
* attributes, and file systems don't expect it to be mixed with
}
inode_lock(inode);
+ err = fh_fill_pre_attrs(fhp);
+ if (err)
+ goto out_unlock;
+
+ if (guardtime) {
+ struct timespec64 ctime = inode_get_ctime(inode);
+ if ((u32)guardtime->tv_sec != (u32)ctime.tv_sec ||
+ guardtime->tv_nsec != ctime.tv_nsec) {
+ err = nfserr_notsync;
+ goto out_fill_attrs;
+ }
+ }
+
for (retries = 1;;) {
struct iattr attrs;
attr->na_aclerr = set_posix_acl(&nop_mnt_idmap,
dentry, ACL_TYPE_DEFAULT,
attr->na_dpacl);
+out_fill_attrs:
+ /*
+ * RFC 1813 Section 3.3.2 does not mandate that an NFS server
+ * returns wcc_data for SETATTR. Some client implementations
+ * depend on receiving wcc_data, however, to sort out partial
+ * updates (eg., the client requested that size and mode be
+ * modified, but the server changed only the file mode).
+ */
+ fh_fill_post_attrs(fhp);
+out_unlock:
inode_unlock(inode);
if (size_change)
put_write_access(inode);
out:
if (!host_err)
host_err = commit_metadata(fhp);
- return nfserrno(host_err);
+ return err != 0 ? err : nfserrno(host_err);
}
#if defined(CONFIG_NFSD_V4)
unsigned long *count, u32 *eof, ssize_t host_err)
{
if (host_err >= 0) {
- nfsd_stats_io_read_add(fhp->fh_export, host_err);
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+
+ nfsd_stats_io_read_add(nn, fhp->fh_export, host_err);
*eof = nfsd_eof_on_read(file, offset, host_err, *count);
*count = host_err;
fsnotify_access(file);
goto out_nfserr;
}
*cnt = host_err;
- nfsd_stats_io_write_add(exp, *cnt);
+ nfsd_stats_io_write_add(nn, exp, *cnt);
fsnotify_modify(file);
host_err = filemap_check_wb_err(file->f_mapping, since);
if (host_err < 0)
* if the attributes have not changed.
*/
if (iap->ia_valid)
- status = nfsd_setattr(rqstp, resfhp, attrs, 0, (time64_t)0);
+ status = nfsd_setattr(rqstp, resfhp, attrs, NULL);
else
status = nfserrno(commit_metadata(resfhp));
fh_drop_write(ffhp);
/*
- * If the target dentry has cached open files, then we need to try to
- * close them prior to doing the rename. Flushing delayed fput
- * shouldn't be done with locks held however, so we delay it until this
- * point and then reattempt the whole shebang.
+ * If the target dentry has cached open files, then we need to
+ * try to close them prior to doing the rename. Final fput
+ * shouldn't be done with locks held however, so we delay it
+ * until this point and then reattempt the whole shebang.
*/
if (close_cached) {
close_cached = false;
if (err == nfserr_eof || err == nfserr_toosmall)
err = nfs_ok; /* can still be found in ->err */
out_close:
- fput(file);
+ nfsd_filp_close(file);
out:
return err;
}
+/**
+ * nfsd_filp_close: close a file synchronously
+ * @fp: the file to close
+ *
+ * nfsd_filp_close() is similar in behaviour to filp_close().
+ * The difference is that if this is the final close on the
+ * file, the that finalisation happens immediately, rather then
+ * being handed over to a work_queue, as it the case for
+ * filp_close().
+ * When a user-space process closes a file (even when using
+ * filp_close() the finalisation happens before returning to
+ * userspace, so it is effectively synchronous. When a kernel thread
+ * uses file_close(), on the other hand, the handling is completely
+ * asynchronous. This means that any cost imposed by that finalisation
+ * is not imposed on the nfsd thread, and nfsd could potentually
+ * close files more quickly than the work queue finalises the close,
+ * which would lead to unbounded growth in the queue.
+ *
+ * In some contexts is it not safe to synchronously wait for
+ * close finalisation (see comment for __fput_sync()), but nfsd
+ * does not match those contexts. In partcilarly it does not, at the
+ * time that this function is called, hold and locks and no finalisation
+ * of any file, socket, or device driver would have any cause to wait
+ * for nfsd to make progress.
+ */
+void nfsd_filp_close(struct file *fp)
+{
+ get_file(fp);
+ filp_close(fp, NULL);
+ __fput_sync(fp);
+}
+
/*
* Get file system stats
* N.B. After this call fhp needs an fh_put
git.samba.org / sfrench / cifs-2.6.git / blobdiff