diff options
| -rw-r--r-- | fs/nfs/dir.c | 61 |
1 files changed, 37 insertions, 24 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 2a768d05a534..257e4052492e 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -225,33 +225,42 @@ int nfs_readdir_clear_array(struct page *page, gfp_t mask) * nfs_clear_readdir_array() */ static -void nfs_readdir_make_qstr(struct qstr *string, const char *name, unsigned int len) +int nfs_readdir_make_qstr(struct qstr *string, const char *name, unsigned int len) { string->len = len; string->name = kmemdup(name, len, GFP_KERNEL); - string->hash = full_name_hash(string->name, string->len); + if (string->name == NULL) + return -ENOMEM; + string->hash = full_name_hash(name, len); + return 0; } static int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) { struct nfs_cache_array *array = nfs_readdir_get_array(page); + struct nfs_cache_array_entry *cache_entry; + int ret; + if (IS_ERR(array)) return PTR_ERR(array); - if (array->size >= MAX_READDIR_ARRAY) { - nfs_readdir_release_array(page); - return -EIO; - } + ret = -EIO; + if (array->size >= MAX_READDIR_ARRAY) + goto out; - array->array[array->size].cookie = entry->prev_cookie; + cache_entry = &array->array[array->size]; + cache_entry->cookie = entry->prev_cookie; + cache_entry->ino = entry->ino; + ret = nfs_readdir_make_qstr(&cache_entry->string, entry->name, entry->len); + if (ret) + goto out; array->last_cookie = entry->cookie; - array->array[array->size].ino = entry->ino; - nfs_readdir_make_qstr(&array->array[array->size].string, entry->name, entry->len); if (entry->eof == 1) array->eof_index = array->size; array->size++; +out: nfs_readdir_release_array(page); - return 0; + return ret; } static @@ -388,21 +397,24 @@ different: static void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) { - struct qstr filename; - struct dentry *dentry = NULL; - struct dentry *alias = NULL; + struct qstr filename = { + .len = entry->len, + .name = entry->name, + }; + struct dentry *dentry; + struct dentry *alias; struct inode *dir = parent->d_inode; struct inode *inode; - nfs_readdir_make_qstr(&filename, entry->name, entry->len); - if (filename.len == 1 && filename.name[0] == '.') - dentry = dget(parent); - else if (filename.len == 2 && filename.name[0] == '.' - && filename.name[1] == '.') - dentry = dget_parent(parent); - else - dentry = d_lookup(parent, &filename); + if (filename.name[0] == '.') { + if (filename.len == 1) + return; + if (filename.len == 2 && filename.name[1] == '.') + return; + } + filename.hash = full_name_hash(filename.name, filename.len); + dentry = d_lookup(parent, &filename); if (dentry != NULL) { if (nfs_same_file(dentry, entry)) { nfs_refresh_inode(dentry->d_inode, entry->fattr); @@ -414,6 +426,9 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) } dentry = d_alloc(parent, &filename); + if (dentry == NULL) + return; + dentry->d_op = NFS_PROTO(dir)->dentry_ops; inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr); if (IS_ERR(inode)) @@ -430,8 +445,6 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) out: dput(dentry); - kfree(filename.name); - return; } /* Perform conversion from xdr to cache array */ @@ -508,7 +521,7 @@ void *nfs_readdir_large_page(struct page **pages, unsigned int npages) pages[i] = page; } - ptr = vm_map_ram(pages, NFS_MAX_READDIR_PAGES, 0, PAGE_KERNEL); + ptr = vm_map_ram(pages, npages, 0, PAGE_KERNEL); if (!IS_ERR_OR_NULL(ptr)) return ptr; out_freepages: |