diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 206742bbb..4a3796c6b 100755 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -330,37 +330,27 @@ nfsd_file_alloc(struct nfsd_file_lookup_key *key, unsigned int may) return nf; } +/** + * nfsd_file_check_write_error - check for writeback errors on a file + * @nf: nfsd_file to check for writeback errors + * + * Check whether a nfsd_file has an unseen error. Reset the write + * verifier if so. + */ static void -nfsd_file_fsync(struct nfsd_file *nf) -{ - struct file *file = nf->nf_file; - int ret; - - if (!file || !(file->f_mode & FMODE_WRITE)) - return; - ret = vfs_fsync(file, 1); - trace_nfsd_file_fsync(nf, ret); - if (ret) - nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id)); -} - -static int nfsd_file_check_write_error(struct nfsd_file *nf) { struct file *file = nf->nf_file; - if (!file || !(file->f_mode & FMODE_WRITE)) - return 0; - return filemap_check_wb_err(file->f_mapping, READ_ONCE(file->f_wb_err)); + if ((file->f_mode & FMODE_WRITE) && + filemap_check_wb_err(file->f_mapping, READ_ONCE(file->f_wb_err))) + nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id)); } static void nfsd_file_hash_remove(struct nfsd_file *nf) { trace_nfsd_file_unhash(nf); - - if (nfsd_file_check_write_error(nf)) - nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id)); rhashtable_remove_fast(&nfsd_file_rhash_tbl, &nf->nf_rhash, nfsd_file_rhash_params); } @@ -386,23 +376,12 @@ nfsd_file_free(struct nfsd_file *nf) this_cpu_add(nfsd_file_total_age, age); nfsd_file_unhash(nf); - - /* - * We call fsync here in order to catch writeback errors. It's not - * strictly required by the protocol, but an nfsd_file could get - * evicted from the cache before a COMMIT comes in. If another - * task were to open that file in the interim and scrape the error, - * then the client may never see it. By calling fsync here, we ensure - * that writeback happens before the entry is freed, and that any - * errors reported result in the write verifier changing. - */ - nfsd_file_fsync(nf); - if (nf->nf_mark) nfsd_file_mark_put(nf->nf_mark); if (nf->nf_file) { get_file(nf->nf_file); filp_close(nf->nf_file, NULL); + nfsd_file_check_write_error(nf); fput(nf->nf_file); } @@ -1157,6 +1136,7 @@ wait_for_construction: out: if (status == nfs_ok) { this_cpu_inc(nfsd_file_acquisitions); + nfsd_file_check_write_error(nf); *pnf = nf; } else { if (refcount_dec_and_test(&nf->nf_ref)) diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index 0f6749827..445d00f00 100755 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -1112,37 +1112,6 @@ TRACE_EVENT(nfsd_file_close, ) ); -TRACE_EVENT(nfsd_file_fsync, - TP_PROTO( - const struct nfsd_file *nf, - int ret - ), - TP_ARGS(nf, ret), - TP_STRUCT__entry( - __field(void *, nf_inode) - __field(int, nf_ref) - __field(int, ret) - __field(unsigned long, nf_flags) - __field(unsigned char, nf_may) - __field(struct file *, nf_file) - ), - TP_fast_assign( - __entry->nf_inode = nf->nf_inode; - __entry->nf_ref = refcount_read(&nf->nf_ref); - __entry->ret = ret; - __entry->nf_flags = nf->nf_flags; - __entry->nf_may = nf->nf_may; - __entry->nf_file = nf->nf_file; - ), - TP_printk("inode=%p ref=%d flags=%s may=%s nf_file=%p ret=%d", - __entry->nf_inode, - __entry->nf_ref, - show_nf_flags(__entry->nf_flags), - show_nfsd_may_flags(__entry->nf_may), - __entry->nf_file, __entry->ret - ) -); - #include "cache.h" TRACE_DEFINE_ENUM(RC_DROPIT);