From 9cdda8d31ffb87ba688f91104be200e2a96a38cd Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 22 May 2013 16:48:09 -0400 Subject: [PATCH] [readdir] convert btrfs Signed-off-by: Al Viro --- fs/btrfs/delayed-inode.c | 9 ++++---- fs/btrfs/delayed-inode.h | 3 +-- fs/btrfs/inode.c | 49 +++++++++++++--------------------------- 3 files changed, 21 insertions(+), 40 deletions(-) diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c index f26f38ccd194..eb34438ddedb 100644 --- a/fs/btrfs/delayed-inode.c +++ b/fs/btrfs/delayed-inode.c @@ -1681,8 +1681,7 @@ int btrfs_should_delete_dir_index(struct list_head *del_list, * btrfs_readdir_delayed_dir_index - read dir info stored in the delayed tree * */ -int btrfs_readdir_delayed_dir_index(struct file *filp, void *dirent, - filldir_t filldir, +int btrfs_readdir_delayed_dir_index(struct dir_context *ctx, struct list_head *ins_list) { struct btrfs_dir_item *di; @@ -1704,13 +1703,13 @@ int btrfs_readdir_delayed_dir_index(struct file *filp, void *dirent, list_for_each_entry_safe(curr, next, ins_list, readdir_list) { list_del(&curr->readdir_list); - if (curr->key.offset < filp->f_pos) { + if (curr->key.offset < ctx->pos) { if (atomic_dec_and_test(&curr->refs)) kfree(curr); continue; } - filp->f_pos = curr->key.offset; + ctx->pos = curr->key.offset; di = (struct btrfs_dir_item *)curr->data; name = (char *)(di + 1); @@ -1719,7 +1718,7 @@ int btrfs_readdir_delayed_dir_index(struct file *filp, void *dirent, d_type = btrfs_filetype_table[di->type]; btrfs_disk_key_to_cpu(&location, &di->location); - over = filldir(dirent, name, name_len, curr->key.offset, + over = !dir_emit(ctx, name, name_len, location.objectid, d_type); if (atomic_dec_and_test(&curr->refs)) diff --git a/fs/btrfs/delayed-inode.h b/fs/btrfs/delayed-inode.h index 1d5c5f7abe3e..a4b38f934d14 100644 --- a/fs/btrfs/delayed-inode.h +++ b/fs/btrfs/delayed-inode.h @@ -139,8 +139,7 @@ void btrfs_put_delayed_items(struct list_head *ins_list, struct list_head *del_list); int btrfs_should_delete_dir_index(struct list_head *del_list, u64 index); -int btrfs_readdir_delayed_dir_index(struct file *filp, void *dirent, - filldir_t filldir, +int btrfs_readdir_delayed_dir_index(struct dir_context *ctx, struct list_head *ins_list); /* for init */ diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 17f3064b4a3e..a46b656d08de 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -5137,10 +5137,9 @@ unsigned char btrfs_filetype_table[] = { DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK }; -static int btrfs_real_readdir(struct file *filp, void *dirent, - filldir_t filldir) +static int btrfs_real_readdir(struct file *file, struct dir_context *ctx) { - struct inode *inode = file_inode(filp); + struct inode *inode = file_inode(file); struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_item *item; struct btrfs_dir_item *di; @@ -5161,29 +5160,15 @@ static int btrfs_real_readdir(struct file *filp, void *dirent, char tmp_name[32]; char *name_ptr; int name_len; - int is_curr = 0; /* filp->f_pos points to the current index? */ + int is_curr = 0; /* ctx->pos points to the current index? */ /* FIXME, use a real flag for deciding about the key type */ if (root->fs_info->tree_root == root) key_type = BTRFS_DIR_ITEM_KEY; - /* special case for "." */ - if (filp->f_pos == 0) { - over = filldir(dirent, ".", 1, - filp->f_pos, btrfs_ino(inode), DT_DIR); - if (over) - return 0; - filp->f_pos = 1; - } - /* special case for .., just use the back ref */ - if (filp->f_pos == 1) { - u64 pino = parent_ino(filp->f_path.dentry); - over = filldir(dirent, "..", 2, - filp->f_pos, pino, DT_DIR); - if (over) - return 0; - filp->f_pos = 2; - } + if (!dir_emit_dots(file, ctx)) + return 0; + path = btrfs_alloc_path(); if (!path) return -ENOMEM; @@ -5197,7 +5182,7 @@ static int btrfs_real_readdir(struct file *filp, void *dirent, } btrfs_set_key_type(&key, key_type); - key.offset = filp->f_pos; + key.offset = ctx->pos; key.objectid = btrfs_ino(inode); ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); @@ -5223,14 +5208,14 @@ static int btrfs_real_readdir(struct file *filp, void *dirent, break; if (btrfs_key_type(&found_key) != key_type) break; - if (found_key.offset < filp->f_pos) + if (found_key.offset < ctx->pos) goto next; if (key_type == BTRFS_DIR_INDEX_KEY && btrfs_should_delete_dir_index(&del_list, found_key.offset)) goto next; - filp->f_pos = found_key.offset; + ctx->pos = found_key.offset; is_curr = 1; di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item); @@ -5274,9 +5259,8 @@ static int btrfs_real_readdir(struct file *filp, void *dirent, over = 0; goto skip; } - over = filldir(dirent, name_ptr, name_len, - found_key.offset, location.objectid, - d_type); + over = !dir_emit(ctx, name_ptr, name_len, + location.objectid, d_type); skip: if (name_ptr != tmp_name) @@ -5295,9 +5279,8 @@ next: if (key_type == BTRFS_DIR_INDEX_KEY) { if (is_curr) - filp->f_pos++; - ret = btrfs_readdir_delayed_dir_index(filp, dirent, filldir, - &ins_list); + ctx->pos++; + ret = btrfs_readdir_delayed_dir_index(ctx, &ins_list); if (ret) goto nopos; } @@ -5308,9 +5291,9 @@ next: * 32-bit glibc will use getdents64, but then strtol - * so the last number we can serve is this. */ - filp->f_pos = 0x7fffffff; + ctx->pos = 0x7fffffff; else - filp->f_pos++; + ctx->pos++; nopos: ret = 0; err: @@ -8731,7 +8714,7 @@ static const struct inode_operations btrfs_dir_ro_inode_operations = { static const struct file_operations btrfs_dir_file_operations = { .llseek = generic_file_llseek, .read = generic_read_dir, - .readdir = btrfs_real_readdir, + .iterate = btrfs_real_readdir, .unlocked_ioctl = btrfs_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = btrfs_ioctl, -- 2.30.2