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-rw-r--r--fs/reiserfs/dir.c346
1 files changed, 0 insertions, 346 deletions
diff --git a/fs/reiserfs/dir.c b/fs/reiserfs/dir.c
deleted file mode 100644
index 79ee2b436685..000000000000
--- a/fs/reiserfs/dir.c
+++ /dev/null
@@ -1,346 +0,0 @@
-/*
- * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
- */
-
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include "reiserfs.h"
-#include <linux/stat.h>
-#include <linux/buffer_head.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-
-extern const struct reiserfs_key MIN_KEY;
-
-static int reiserfs_readdir(struct file *, struct dir_context *);
-static int reiserfs_dir_fsync(struct file *filp, loff_t start, loff_t end,
- int datasync);
-
-const struct file_operations reiserfs_dir_operations = {
- .llseek = generic_file_llseek,
- .read = generic_read_dir,
- .iterate_shared = reiserfs_readdir,
- .fsync = reiserfs_dir_fsync,
- .unlocked_ioctl = reiserfs_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = reiserfs_compat_ioctl,
-#endif
-};
-
-static int reiserfs_dir_fsync(struct file *filp, loff_t start, loff_t end,
- int datasync)
-{
- struct inode *inode = filp->f_mapping->host;
- int err;
-
- err = file_write_and_wait_range(filp, start, end);
- if (err)
- return err;
-
- inode_lock(inode);
- reiserfs_write_lock(inode->i_sb);
- err = reiserfs_commit_for_inode(inode);
- reiserfs_write_unlock(inode->i_sb);
- inode_unlock(inode);
- if (err < 0)
- return err;
- return 0;
-}
-
-#define store_ih(where,what) copy_item_head (where, what)
-
-static inline bool is_privroot_deh(struct inode *dir, struct reiserfs_de_head *deh)
-{
- struct dentry *privroot = REISERFS_SB(dir->i_sb)->priv_root;
- return (d_really_is_positive(privroot) &&
- deh->deh_objectid == INODE_PKEY(d_inode(privroot))->k_objectid);
-}
-
-int reiserfs_readdir_inode(struct inode *inode, struct dir_context *ctx)
-{
-
- /* key of current position in the directory (key of directory entry) */
- struct cpu_key pos_key;
-
- INITIALIZE_PATH(path_to_entry);
- struct buffer_head *bh;
- int item_num, entry_num;
- const struct reiserfs_key *rkey;
- struct item_head *ih, tmp_ih;
- int search_res;
- char *local_buf;
- loff_t next_pos;
- char small_buf[32]; /* avoid kmalloc if we can */
- struct reiserfs_dir_entry de;
- int ret = 0;
- int depth;
-
- reiserfs_write_lock(inode->i_sb);
-
- reiserfs_check_lock_depth(inode->i_sb, "readdir");
-
- /*
- * form key for search the next directory entry using
- * f_pos field of file structure
- */
- make_cpu_key(&pos_key, inode, ctx->pos ?: DOT_OFFSET, TYPE_DIRENTRY, 3);
- next_pos = cpu_key_k_offset(&pos_key);
-
- path_to_entry.reada = PATH_READA;
- while (1) {
-research:
- /*
- * search the directory item, containing entry with
- * specified key
- */
- search_res =
- search_by_entry_key(inode->i_sb, &pos_key, &path_to_entry,
- &de);
- if (search_res == IO_ERROR) {
- /*
- * FIXME: we could just skip part of directory
- * which could not be read
- */
- ret = -EIO;
- goto out;
- }
- entry_num = de.de_entry_num;
- bh = de.de_bh;
- item_num = de.de_item_num;
- ih = de.de_ih;
- store_ih(&tmp_ih, ih);
-
- /* we must have found item, that is item of this directory, */
- RFALSE(COMP_SHORT_KEYS(&ih->ih_key, &pos_key),
- "vs-9000: found item %h does not match to dir we readdir %K",
- ih, &pos_key);
- RFALSE(item_num > B_NR_ITEMS(bh) - 1,
- "vs-9005 item_num == %d, item amount == %d",
- item_num, B_NR_ITEMS(bh));
-
- /*
- * and entry must be not more than number of entries
- * in the item
- */
- RFALSE(ih_entry_count(ih) < entry_num,
- "vs-9010: entry number is too big %d (%d)",
- entry_num, ih_entry_count(ih));
-
- /*
- * go through all entries in the directory item beginning
- * from the entry, that has been found
- */
- if (search_res == POSITION_FOUND
- || entry_num < ih_entry_count(ih)) {
- struct reiserfs_de_head *deh =
- B_I_DEH(bh, ih) + entry_num;
-
- for (; entry_num < ih_entry_count(ih);
- entry_num++, deh++) {
- int d_reclen;
- char *d_name;
- ino_t d_ino;
- loff_t cur_pos = deh_offset(deh);
-
- /* it is hidden entry */
- if (!de_visible(deh))
- continue;
- d_reclen = entry_length(bh, ih, entry_num);
- d_name = B_I_DEH_ENTRY_FILE_NAME(bh, ih, deh);
-
- if (d_reclen <= 0 ||
- d_name + d_reclen > bh->b_data + bh->b_size) {
- /*
- * There is corrupted data in entry,
- * We'd better stop here
- */
- pathrelse(&path_to_entry);
- ret = -EIO;
- goto out;
- }
-
- if (!d_name[d_reclen - 1])
- d_reclen = strlen(d_name);
-
- /* too big to send back to VFS */
- if (d_reclen >
- REISERFS_MAX_NAME(inode->i_sb->
- s_blocksize)) {
- continue;
- }
-
- /* Ignore the .reiserfs_priv entry */
- if (is_privroot_deh(inode, deh))
- continue;
-
- ctx->pos = deh_offset(deh);
- d_ino = deh_objectid(deh);
- if (d_reclen <= 32) {
- local_buf = small_buf;
- } else {
- local_buf = kmalloc(d_reclen,
- GFP_NOFS);
- if (!local_buf) {
- pathrelse(&path_to_entry);
- ret = -ENOMEM;
- goto out;
- }
- if (item_moved(&tmp_ih, &path_to_entry)) {
- kfree(local_buf);
- goto research;
- }
- }
-
- /*
- * Note, that we copy name to user space via
- * temporary buffer (local_buf) because
- * filldir will block if user space buffer is
- * swapped out. At that time entry can move to
- * somewhere else
- */
- memcpy(local_buf, d_name, d_reclen);
-
- /*
- * Since filldir might sleep, we can release
- * the write lock here for other waiters
- */
- depth = reiserfs_write_unlock_nested(inode->i_sb);
- if (!dir_emit
- (ctx, local_buf, d_reclen, d_ino,
- DT_UNKNOWN)) {
- reiserfs_write_lock_nested(inode->i_sb, depth);
- if (local_buf != small_buf) {
- kfree(local_buf);
- }
- goto end;
- }
- reiserfs_write_lock_nested(inode->i_sb, depth);
- if (local_buf != small_buf) {
- kfree(local_buf);
- }
-
- /* deh_offset(deh) may be invalid now. */
- next_pos = cur_pos + 1;
-
- if (item_moved(&tmp_ih, &path_to_entry)) {
- set_cpu_key_k_offset(&pos_key,
- next_pos);
- goto research;
- }
- } /* for */
- }
-
- /* end of directory has been reached */
- if (item_num != B_NR_ITEMS(bh) - 1)
- goto end;
-
- /*
- * item we went through is last item of node. Using right
- * delimiting key check is it directory end
- */
- rkey = get_rkey(&path_to_entry, inode->i_sb);
- if (!comp_le_keys(rkey, &MIN_KEY)) {
- /*
- * set pos_key to key, that is the smallest and greater
- * that key of the last entry in the item
- */
- set_cpu_key_k_offset(&pos_key, next_pos);
- continue;
- }
-
- /* end of directory has been reached */
- if (COMP_SHORT_KEYS(rkey, &pos_key)) {
- goto end;
- }
-
- /* directory continues in the right neighboring block */
- set_cpu_key_k_offset(&pos_key,
- le_key_k_offset(KEY_FORMAT_3_5, rkey));
-
- } /* while */
-
-end:
- ctx->pos = next_pos;
- pathrelse(&path_to_entry);
- reiserfs_check_path(&path_to_entry);
-out:
- reiserfs_write_unlock(inode->i_sb);
- return ret;
-}
-
-static int reiserfs_readdir(struct file *file, struct dir_context *ctx)
-{
- return reiserfs_readdir_inode(file_inode(file), ctx);
-}
-
-/*
- * compose directory item containing "." and ".." entries (entries are
- * not aligned to 4 byte boundary)
- */
-void make_empty_dir_item_v1(char *body, __le32 dirid, __le32 objid,
- __le32 par_dirid, __le32 par_objid)
-{
- struct reiserfs_de_head *dot, *dotdot;
-
- memset(body, 0, EMPTY_DIR_SIZE_V1);
- dot = (struct reiserfs_de_head *)body;
- dotdot = dot + 1;
-
- /* direntry header of "." */
- put_deh_offset(dot, DOT_OFFSET);
- /* these two are from make_le_item_head, and are LE */
- dot->deh_dir_id = dirid;
- dot->deh_objectid = objid;
- dot->deh_state = 0; /* Endian safe if 0 */
- put_deh_location(dot, EMPTY_DIR_SIZE_V1 - strlen("."));
- mark_de_visible(dot);
-
- /* direntry header of ".." */
- put_deh_offset(dotdot, DOT_DOT_OFFSET);
- /* key of ".." for the root directory */
- /* these two are from the inode, and are LE */
- dotdot->deh_dir_id = par_dirid;
- dotdot->deh_objectid = par_objid;
- dotdot->deh_state = 0; /* Endian safe if 0 */
- put_deh_location(dotdot, deh_location(dot) - strlen(".."));
- mark_de_visible(dotdot);
-
- /* copy ".." and "." */
- memcpy(body + deh_location(dot), ".", 1);
- memcpy(body + deh_location(dotdot), "..", 2);
-}
-
-/* compose directory item containing "." and ".." entries */
-void make_empty_dir_item(char *body, __le32 dirid, __le32 objid,
- __le32 par_dirid, __le32 par_objid)
-{
- struct reiserfs_de_head *dot, *dotdot;
-
- memset(body, 0, EMPTY_DIR_SIZE);
- dot = (struct reiserfs_de_head *)body;
- dotdot = dot + 1;
-
- /* direntry header of "." */
- put_deh_offset(dot, DOT_OFFSET);
- /* these two are from make_le_item_head, and are LE */
- dot->deh_dir_id = dirid;
- dot->deh_objectid = objid;
- dot->deh_state = 0; /* Endian safe if 0 */
- put_deh_location(dot, EMPTY_DIR_SIZE - ROUND_UP(strlen(".")));
- mark_de_visible(dot);
-
- /* direntry header of ".." */
- put_deh_offset(dotdot, DOT_DOT_OFFSET);
- /* key of ".." for the root directory */
- /* these two are from the inode, and are LE */
- dotdot->deh_dir_id = par_dirid;
- dotdot->deh_objectid = par_objid;
- dotdot->deh_state = 0; /* Endian safe if 0 */
- put_deh_location(dotdot, deh_location(dot) - ROUND_UP(strlen("..")));
- mark_de_visible(dotdot);
-
- /* copy ".." and "." */
- memcpy(body + deh_location(dot), ".", 1);
- memcpy(body + deh_location(dotdot), "..", 2);
-}
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