diff options
| -rw-r--r-- | fs/nfs/dir.c | 90 |
1 files changed, 56 insertions, 34 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 635ff65..c6ce8af 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -194,9 +194,13 @@ typedef struct { static struct nfs_cache_array *nfs_readdir_get_array(struct page *page) { + void *ptr; if (page == NULL) return ERR_PTR(-EIO); - return (struct nfs_cache_array *)kmap(page); + ptr = kmap(page); + if (ptr == NULL) + return ERR_PTR(-ENOMEM); + return ptr; } static @@ -213,6 +217,9 @@ int nfs_readdir_clear_array(struct page *page, gfp_t mask) { struct nfs_cache_array *array = nfs_readdir_get_array(page); int i; + + if (IS_ERR(array)) + return PTR_ERR(array); for (i = 0; i < array->size; i++) kfree(array->array[i].string.name); nfs_readdir_release_array(page); @@ -244,7 +251,7 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) if (IS_ERR(array)) return PTR_ERR(array); - ret = -EIO; + ret = -ENOSPC; if (array->size >= MAX_READDIR_ARRAY) goto out; @@ -255,9 +262,9 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) if (ret) goto out; array->last_cookie = entry->cookie; + array->size++; if (entry->eof == 1) array->eof_index = array->size; - array->size++; out: nfs_readdir_release_array(page); return ret; @@ -272,7 +279,7 @@ int nfs_readdir_search_for_pos(struct nfs_cache_array *array, nfs_readdir_descri if (diff < 0) goto out_eof; if (diff >= array->size) { - if (array->eof_index > 0) + if (array->eof_index >= 0) goto out_eof; desc->current_index += array->size; return -EAGAIN; @@ -281,8 +288,6 @@ int nfs_readdir_search_for_pos(struct nfs_cache_array *array, nfs_readdir_descri index = (unsigned int)diff; *desc->dir_cookie = array->array[index].cookie; desc->cache_entry_index = index; - if (index == array->eof_index) - desc->eof = 1; return 0; out_eof: desc->eof = 1; @@ -296,17 +301,17 @@ int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_des int status = -EAGAIN; for (i = 0; i < array->size; i++) { - if (i == array->eof_index) { - desc->eof = 1; - status = -EBADCOOKIE; - } if (array->array[i].cookie == *desc->dir_cookie) { desc->cache_entry_index = i; status = 0; - break; + goto out; } } - + if (i == array->eof_index) { + desc->eof = 1; + status = -EBADCOOKIE; + } +out: return status; } @@ -449,7 +454,7 @@ out: /* Perform conversion from xdr to cache array */ static -void nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, +int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, void *xdr_page, struct page *page, unsigned int buflen) { struct xdr_stream stream; @@ -471,21 +476,29 @@ void nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *e do { status = xdr_decode(desc, entry, &stream); - if (status != 0) + if (status != 0) { + if (status == -EAGAIN) + status = 0; break; + } - if (nfs_readdir_add_to_array(entry, page) == -1) - break; if (desc->plus == 1) nfs_prime_dcache(desc->file->f_path.dentry, entry); + + status = nfs_readdir_add_to_array(entry, page); + if (status != 0) + break; } while (!entry->eof); if (status == -EBADCOOKIE && entry->eof) { array = nfs_readdir_get_array(page); - array->eof_index = array->size - 1; - status = 0; - nfs_readdir_release_array(page); + if (!IS_ERR(array)) { + array->eof_index = array->size; + status = 0; + nfs_readdir_release_array(page); + } } + return status; } static @@ -537,7 +550,7 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, struct nfs_entry entry; struct file *file = desc->file; struct nfs_cache_array *array; - int status = 0; + int status = -ENOMEM; unsigned int array_size = ARRAY_SIZE(pages); entry.prev_cookie = 0; @@ -549,6 +562,10 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, goto out; array = nfs_readdir_get_array(page); + if (IS_ERR(array)) { + status = PTR_ERR(array); + goto out; + } memset(array, 0, sizeof(struct nfs_cache_array)); array->eof_index = -1; @@ -560,8 +577,13 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, if (status < 0) break; - nfs_readdir_page_filler(desc, &entry, pages_ptr, page, array_size * PAGE_SIZE); - } while (array->eof_index < 0 && array->size < MAX_READDIR_ARRAY); + status = nfs_readdir_page_filler(desc, &entry, pages_ptr, page, array_size * PAGE_SIZE); + if (status < 0) { + if (status == -ENOSPC) + status = 0; + break; + } + } while (array->eof_index < 0); nfs_readdir_free_large_page(pages_ptr, pages, array_size); out_release_array: @@ -582,8 +604,10 @@ static int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page) { struct inode *inode = desc->file->f_path.dentry->d_inode; + int ret; - if (nfs_readdir_xdr_to_array(desc, page, inode) < 0) + ret = nfs_readdir_xdr_to_array(desc, page, inode); + if (ret < 0) goto error; SetPageUptodate(page); @@ -595,7 +619,7 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page) return 0; error: unlock_page(page); - return -EIO; + return ret; } static @@ -608,12 +632,8 @@ void cache_page_release(nfs_readdir_descriptor_t *desc) static struct page *get_cache_page(nfs_readdir_descriptor_t *desc) { - struct page *page; - page = read_cache_page(desc->file->f_path.dentry->d_inode->i_mapping, + return read_cache_page(desc->file->f_path.dentry->d_inode->i_mapping, desc->page_index, (filler_t *)nfs_readdir_filler, desc); - if (IS_ERR(page)) - desc->eof = 1; - return page; } /* @@ -639,8 +659,10 @@ int find_cache_page(nfs_readdir_descriptor_t *desc) static inline int readdir_search_pagecache(nfs_readdir_descriptor_t *desc) { - int res = -EAGAIN; + int res; + if (desc->page_index == 0) + desc->current_index = 0; while (1) { res = find_cache_page(desc); if (res != -EAGAIN) @@ -670,6 +692,8 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, struct dentry *dentry = NULL; array = nfs_readdir_get_array(desc->page); + if (IS_ERR(array)) + return PTR_ERR(array); for (i = desc->cache_entry_index; i < array->size; i++) { d_type = DT_UNKNOWN; @@ -685,11 +709,9 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, *desc->dir_cookie = array->array[i+1].cookie; else *desc->dir_cookie = array->last_cookie; - if (i == array->eof_index) { - desc->eof = 1; - break; - } } + if (i == array->eof_index) + desc->eof = 1; nfs_readdir_release_array(desc->page); cache_page_release(desc); |
