--- /dev/null
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ *
+ * Trivial changes by Alan Cox to remove EHASHCOLLISION for compatibility
+ *
+ * Trivial Changes:
+ * Rights granted to Hans Reiser to redistribute under other terms providing
+ * he accepts all liability including but not limited to patent, fitness
+ * for purpose, and direct or indirect claims arising from failure to perform.
+ *
+ * NO WARRANTY
+ */
+
+#include <linux/time.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include "reiserfs.h"
+#include "acl.h"
+#include "xattr.h"
+#include <linux/quotaops.h>
+
+#define INC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) { inc_nlink(i); if (i->i_nlink >= REISERFS_LINK_MAX) set_nlink(i, 1); }
+#define DEC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) drop_nlink(i);
+
+/*
+ * directory item contains array of entry headers. This performs
+ * binary search through that array
+ */
+static int bin_search_in_dir_item(struct reiserfs_dir_entry *de, loff_t off)
+{
+ struct item_head *ih = de->de_ih;
+ struct reiserfs_de_head *deh = de->de_deh;
+ int rbound, lbound, j;
+
+ lbound = 0;
+ rbound = ih_entry_count(ih) - 1;
+
+ for (j = (rbound + lbound) / 2; lbound <= rbound;
+ j = (rbound + lbound) / 2) {
+ if (off < deh_offset(deh + j)) {
+ rbound = j - 1;
+ continue;
+ }
+ if (off > deh_offset(deh + j)) {
+ lbound = j + 1;
+ continue;
+ }
+ /* this is not name found, but matched third key component */
+ de->de_entry_num = j;
+ return NAME_FOUND;
+ }
+
+ de->de_entry_num = lbound;
+ return NAME_NOT_FOUND;
+}
+
+/*
+ * comment? maybe something like set de to point to what the path points to?
+ */
+static inline void set_de_item_location(struct reiserfs_dir_entry *de,
+ struct treepath *path)
+{
+ de->de_bh = get_last_bh(path);
+ de->de_ih = tp_item_head(path);
+ de->de_deh = B_I_DEH(de->de_bh, de->de_ih);
+ de->de_item_num = PATH_LAST_POSITION(path);
+}
+
+/*
+ * de_bh, de_ih, de_deh (points to first element of array), de_item_num is set
+ */
+inline void set_de_name_and_namelen(struct reiserfs_dir_entry *de)
+{
+ struct reiserfs_de_head *deh = de->de_deh + de->de_entry_num;
+
+ BUG_ON(de->de_entry_num >= ih_entry_count(de->de_ih));
+
+ de->de_entrylen = entry_length(de->de_bh, de->de_ih, de->de_entry_num);
+ de->de_namelen = de->de_entrylen - (de_with_sd(deh) ? SD_SIZE : 0);
+ de->de_name = ih_item_body(de->de_bh, de->de_ih) + deh_location(deh);
+ if (de->de_name[de->de_namelen - 1] == 0)
+ de->de_namelen = strlen(de->de_name);
+}
+
+/* what entry points to */
+static inline void set_de_object_key(struct reiserfs_dir_entry *de)
+{
+ BUG_ON(de->de_entry_num >= ih_entry_count(de->de_ih));
+ de->de_dir_id = deh_dir_id(&de->de_deh[de->de_entry_num]);
+ de->de_objectid = deh_objectid(&de->de_deh[de->de_entry_num]);
+}
+
+static inline void store_de_entry_key(struct reiserfs_dir_entry *de)
+{
+ struct reiserfs_de_head *deh = de->de_deh + de->de_entry_num;
+
+ BUG_ON(de->de_entry_num >= ih_entry_count(de->de_ih));
+
+ /* store key of the found entry */
+ de->de_entry_key.version = KEY_FORMAT_3_5;
+ de->de_entry_key.on_disk_key.k_dir_id =
+ le32_to_cpu(de->de_ih->ih_key.k_dir_id);
+ de->de_entry_key.on_disk_key.k_objectid =
+ le32_to_cpu(de->de_ih->ih_key.k_objectid);
+ set_cpu_key_k_offset(&de->de_entry_key, deh_offset(deh));
+ set_cpu_key_k_type(&de->de_entry_key, TYPE_DIRENTRY);
+}
+
+/*
+ * We assign a key to each directory item, and place multiple entries in a
+ * single directory item. A directory item has a key equal to the key of
+ * the first directory entry in it.
+
+ * This function first calls search_by_key, then, if item whose first entry
+ * matches is not found it looks for the entry inside directory item found
+ * by search_by_key. Fills the path to the entry, and to the entry position
+ * in the item
+ */
+/* The function is NOT SCHEDULE-SAFE! */
+int search_by_entry_key(struct super_block *sb, const struct cpu_key *key,
+ struct treepath *path, struct reiserfs_dir_entry *de)
+{
+ int retval;
+
+ retval = search_item(sb, key, path);
+ switch (retval) {
+ case ITEM_NOT_FOUND:
+ if (!PATH_LAST_POSITION(path)) {
+ reiserfs_error(sb, "vs-7000", "search_by_key "
+ "returned item position == 0");
+ pathrelse(path);
+ return IO_ERROR;
+ }
+ PATH_LAST_POSITION(path)--;
+
+ case ITEM_FOUND:
+ break;
+
+ case IO_ERROR:
+ return retval;
+
+ default:
+ pathrelse(path);
+ reiserfs_error(sb, "vs-7002", "no path to here");
+ return IO_ERROR;
+ }
+
+ set_de_item_location(de, path);
+
+#ifdef CONFIG_REISERFS_CHECK
+ if (!is_direntry_le_ih(de->de_ih) ||
+ COMP_SHORT_KEYS(&de->de_ih->ih_key, key)) {
+ print_block(de->de_bh, 0, -1, -1);
+ reiserfs_panic(sb, "vs-7005", "found item %h is not directory "
+ "item or does not belong to the same directory "
+ "as key %K", de->de_ih, key);
+ }
+#endif /* CONFIG_REISERFS_CHECK */
+
+ /*
+ * binary search in directory item by third component of the
+ * key. sets de->de_entry_num of de
+ */
+ retval = bin_search_in_dir_item(de, cpu_key_k_offset(key));
+ path->pos_in_item = de->de_entry_num;
+ if (retval != NAME_NOT_FOUND) {
+ /*
+ * ugly, but rename needs de_bh, de_deh, de_name,
+ * de_namelen, de_objectid set
+ */
+ set_de_name_and_namelen(de);
+ set_de_object_key(de);
+ }
+ return retval;
+}
+
+/* Keyed 32-bit hash function using TEA in a Davis-Meyer function */
+
+/*
+ * The third component is hashed, and you can choose from more than
+ * one hash function. Per directory hashes are not yet implemented
+ * but are thought about. This function should be moved to hashes.c
+ * Jedi, please do so. -Hans
+ */
+static __u32 get_third_component(struct super_block *s,
+ const char *name, int len)
+{
+ __u32 res;
+
+ if (!len || (len == 1 && name[0] == '.'))
+ return DOT_OFFSET;
+ if (len == 2 && name[0] == '.' && name[1] == '.')
+ return DOT_DOT_OFFSET;
+
+ res = REISERFS_SB(s)->s_hash_function(name, len);
+
+ /* take bits from 7-th to 30-th including both bounds */
+ res = GET_HASH_VALUE(res);
+ if (res == 0)
+ /*
+ * needed to have no names before "." and ".." those have hash
+ * value == 0 and generation conters 1 and 2 accordingly
+ */
+ res = 128;
+ return res + MAX_GENERATION_NUMBER;
+}
+
+static int reiserfs_match(struct reiserfs_dir_entry *de,
+ const char *name, int namelen)
+{
+ int retval = NAME_NOT_FOUND;
+
+ if ((namelen == de->de_namelen) &&
+ !memcmp(de->de_name, name, de->de_namelen))
+ retval =
+ (de_visible(de->de_deh + de->de_entry_num) ? NAME_FOUND :
+ NAME_FOUND_INVISIBLE);
+
+ return retval;
+}
+
+/* de's de_bh, de_ih, de_deh, de_item_num, de_entry_num are set already */
+
+/* used when hash collisions exist */
+
+static int linear_search_in_dir_item(struct cpu_key *key,
+ struct reiserfs_dir_entry *de,
+ const char *name, int namelen)
+{
+ struct reiserfs_de_head *deh = de->de_deh;
+ int retval;
+ int i;
+
+ i = de->de_entry_num;
+
+ if (i == ih_entry_count(de->de_ih) ||
+ GET_HASH_VALUE(deh_offset(deh + i)) !=
+ GET_HASH_VALUE(cpu_key_k_offset(key))) {
+ i--;
+ }
+
+ RFALSE(de->de_deh != B_I_DEH(de->de_bh, de->de_ih),
+ "vs-7010: array of entry headers not found");
+
+ deh += i;
+
+ for (; i >= 0; i--, deh--) {
+ /* hash value does not match, no need to check whole name */
+ if (GET_HASH_VALUE(deh_offset(deh)) !=
+ GET_HASH_VALUE(cpu_key_k_offset(key))) {
+ return NAME_NOT_FOUND;
+ }
+
+ /* mark that this generation number is used */
+ if (de->de_gen_number_bit_string)
+ set_bit(GET_GENERATION_NUMBER(deh_offset(deh)),
+ de->de_gen_number_bit_string);
+
+ /* calculate pointer to name and namelen */
+ de->de_entry_num = i;
+ set_de_name_and_namelen(de);
+
+ /*
+ * de's de_name, de_namelen, de_recordlen are set.
+ * Fill the rest.
+ */
+ if ((retval =
+ reiserfs_match(de, name, namelen)) != NAME_NOT_FOUND) {
+
+ /* key of pointed object */
+ set_de_object_key(de);
+
+ store_de_entry_key(de);
+
+ /* retval can be NAME_FOUND or NAME_FOUND_INVISIBLE */
+ return retval;
+ }
+ }
+
+ if (GET_GENERATION_NUMBER(le_ih_k_offset(de->de_ih)) == 0)
+ /*
+ * we have reached left most entry in the node. In common we
+ * have to go to the left neighbor, but if generation counter
+ * is 0 already, we know for sure, that there is no name with
+ * the same hash value
+ */
+ /*
+ * FIXME: this work correctly only because hash value can not
+ * be 0. Btw, in case of Yura's hash it is probably possible,
+ * so, this is a bug
+ */
+ return NAME_NOT_FOUND;
+
+ RFALSE(de->de_item_num,
+ "vs-7015: two diritems of the same directory in one node?");
+
+ return GOTO_PREVIOUS_ITEM;
+}
+
+/*
+ * may return NAME_FOUND, NAME_FOUND_INVISIBLE, NAME_NOT_FOUND
+ * FIXME: should add something like IOERROR
+ */
+static int reiserfs_find_entry(struct inode *dir, const char *name, int namelen,
+ struct treepath *path_to_entry,
+ struct reiserfs_dir_entry *de)
+{
+ struct cpu_key key_to_search;
+ int retval;
+
+ if (namelen > REISERFS_MAX_NAME(dir->i_sb->s_blocksize))
+ return NAME_NOT_FOUND;
+
+ /* we will search for this key in the tree */
+ make_cpu_key(&key_to_search, dir,
+ get_third_component(dir->i_sb, name, namelen),
+ TYPE_DIRENTRY, 3);
+
+ while (1) {
+ retval =
+ search_by_entry_key(dir->i_sb, &key_to_search,
+ path_to_entry, de);
+ if (retval == IO_ERROR) {
+ reiserfs_error(dir->i_sb, "zam-7001", "io error");
+ return IO_ERROR;
+ }
+
+ /* compare names for all entries having given hash value */
+ retval =
+ linear_search_in_dir_item(&key_to_search, de, name,
+ namelen);
+ /*
+ * there is no need to scan directory anymore.
+ * Given entry found or does not exist
+ */
+ if (retval != GOTO_PREVIOUS_ITEM) {
+ path_to_entry->pos_in_item = de->de_entry_num;
+ return retval;
+ }
+
+ /*
+ * there is left neighboring item of this directory
+ * and given entry can be there
+ */
+ set_cpu_key_k_offset(&key_to_search,
+ le_ih_k_offset(de->de_ih) - 1);
+ pathrelse(path_to_entry);
+
+ } /* while (1) */
+}
+
+static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry,
+ unsigned int flags)
+{
+ int retval;
+ struct inode *inode = NULL;
+ struct reiserfs_dir_entry de;
+ INITIALIZE_PATH(path_to_entry);
+
+ if (REISERFS_MAX_NAME(dir->i_sb->s_blocksize) < dentry->d_name.len)
+ return ERR_PTR(-ENAMETOOLONG);
+
+ reiserfs_write_lock(dir->i_sb);
+
+ de.de_gen_number_bit_string = NULL;
+ retval =
+ reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len,
+ &path_to_entry, &de);
+ pathrelse(&path_to_entry);
+ if (retval == NAME_FOUND) {
+ inode = reiserfs_iget(dir->i_sb,
+ (struct cpu_key *)&de.de_dir_id);
+ if (!inode || IS_ERR(inode)) {
+ reiserfs_write_unlock(dir->i_sb);
+ return ERR_PTR(-EACCES);
+ }
+
+ /*
+ * Propagate the private flag so we know we're
+ * in the priv tree
+ */
+ if (IS_PRIVATE(dir))
+ inode->i_flags |= S_PRIVATE;
+ }
+ reiserfs_write_unlock(dir->i_sb);
+ if (retval == IO_ERROR) {
+ return ERR_PTR(-EIO);
+ }
+
+ return d_splice_alias(inode, dentry);
+}
+
+/*
+ * looks up the dentry of the parent directory for child.
+ * taken from ext2_get_parent
+ */
+struct dentry *reiserfs_get_parent(struct dentry *child)
+{
+ int retval;
+ struct inode *inode = NULL;
+ struct reiserfs_dir_entry de;
+ INITIALIZE_PATH(path_to_entry);
+ struct inode *dir = d_inode(child);
+
+ if (dir->i_nlink == 0) {
+ return ERR_PTR(-ENOENT);
+ }
+ de.de_gen_number_bit_string = NULL;
+
+ reiserfs_write_lock(dir->i_sb);
+ retval = reiserfs_find_entry(dir, "..", 2, &path_to_entry, &de);
+ pathrelse(&path_to_entry);
+ if (retval != NAME_FOUND) {
+ reiserfs_write_unlock(dir->i_sb);
+ return ERR_PTR(-ENOENT);
+ }
+ inode = reiserfs_iget(dir->i_sb, (struct cpu_key *)&de.de_dir_id);
+ reiserfs_write_unlock(dir->i_sb);
+
+ return d_obtain_alias(inode);
+}
+
+/* add entry to the directory (entry can be hidden).
+
+insert definition of when hidden directories are used here -Hans
+
+ Does not mark dir inode dirty, do it after successesfull call to it */
+
+static int reiserfs_add_entry(struct reiserfs_transaction_handle *th,
+ struct inode *dir, const char *name, int namelen,
+ struct inode *inode, int visible)
+{
+ struct cpu_key entry_key;
+ struct reiserfs_de_head *deh;
+ INITIALIZE_PATH(path);
+ struct reiserfs_dir_entry de;
+ DECLARE_BITMAP(bit_string, MAX_GENERATION_NUMBER + 1);
+ int gen_number;
+
+ /*
+ * 48 bytes now and we avoid kmalloc if we
+ * create file with short name
+ */
+ char small_buf[32 + DEH_SIZE];
+
+ char *buffer;
+ int buflen, paste_size;
+ int retval;
+
+ BUG_ON(!th->t_trans_id);
+
+ /* cannot allow items to be added into a busy deleted directory */
+ if (!namelen)
+ return -EINVAL;
+
+ if (namelen > REISERFS_MAX_NAME(dir->i_sb->s_blocksize))
+ return -ENAMETOOLONG;
+
+ /* each entry has unique key. compose it */
+ make_cpu_key(&entry_key, dir,
+ get_third_component(dir->i_sb, name, namelen),
+ TYPE_DIRENTRY, 3);
+
+ /* get memory for composing the entry */
+ buflen = DEH_SIZE + ROUND_UP(namelen);
+ if (buflen > sizeof(small_buf)) {
+ buffer = kmalloc(buflen, GFP_NOFS);
+ if (!buffer)
+ return -ENOMEM;
+ } else
+ buffer = small_buf;
+
+ paste_size =
+ (get_inode_sd_version(dir) ==
+ STAT_DATA_V1) ? (DEH_SIZE + namelen) : buflen;
+
+ /*
+ * fill buffer : directory entry head, name[, dir objectid | ,
+ * stat data | ,stat data, dir objectid ]
+ */
+ deh = (struct reiserfs_de_head *)buffer;
+ deh->deh_location = 0; /* JDM Endian safe if 0 */
+ put_deh_offset(deh, cpu_key_k_offset(&entry_key));
+ deh->deh_state = 0; /* JDM Endian safe if 0 */
+ /* put key (ino analog) to de */
+
+ /* safe: k_dir_id is le */
+ deh->deh_dir_id = INODE_PKEY(inode)->k_dir_id;
+ /* safe: k_objectid is le */
+ deh->deh_objectid = INODE_PKEY(inode)->k_objectid;
+
+ /* copy name */
+ memcpy((char *)(deh + 1), name, namelen);
+ /* padd by 0s to the 4 byte boundary */
+ padd_item((char *)(deh + 1), ROUND_UP(namelen), namelen);
+
+ /*
+ * entry is ready to be pasted into tree, set 'visibility'
+ * and 'stat data in entry' attributes
+ */
+ mark_de_without_sd(deh);
+ visible ? mark_de_visible(deh) : mark_de_hidden(deh);
+
+ /* find the proper place for the new entry */
+ memset(bit_string, 0, sizeof(bit_string));
+ de.de_gen_number_bit_string = bit_string;
+ retval = reiserfs_find_entry(dir, name, namelen, &path, &de);
+ if (retval != NAME_NOT_FOUND) {
+ if (buffer != small_buf)
+ kfree(buffer);
+ pathrelse(&path);
+
+ if (retval == IO_ERROR) {
+ return -EIO;
+ }
+
+ if (retval != NAME_FOUND) {
+ reiserfs_error(dir->i_sb, "zam-7002",
+ "reiserfs_find_entry() returned "
+ "unexpected value (%d)", retval);
+ }
+
+ return -EEXIST;
+ }
+
+ gen_number =
+ find_first_zero_bit(bit_string,
+ MAX_GENERATION_NUMBER + 1);
+ if (gen_number > MAX_GENERATION_NUMBER) {
+ /* there is no free generation number */
+ reiserfs_warning(dir->i_sb, "reiserfs-7010",
+ "Congratulations! we have got hash function "
+ "screwed up");
+ if (buffer != small_buf)
+ kfree(buffer);
+ pathrelse(&path);
+ return -EBUSY;
+ }
+ /* adjust offset of directory enrty */
+ put_deh_offset(deh, SET_GENERATION_NUMBER(deh_offset(deh), gen_number));
+ set_cpu_key_k_offset(&entry_key, deh_offset(deh));
+
+ /* update max-hash-collisions counter in reiserfs_sb_info */
+ PROC_INFO_MAX(th->t_super, max_hash_collisions, gen_number);
+
+ /* we need to re-search for the insertion point */
+ if (gen_number != 0) {
+ if (search_by_entry_key(dir->i_sb, &entry_key, &path, &de) !=
+ NAME_NOT_FOUND) {
+ reiserfs_warning(dir->i_sb, "vs-7032",
+ "entry with this key (%K) already "
+ "exists", &entry_key);
+
+ if (buffer != small_buf)
+ kfree(buffer);
+ pathrelse(&path);
+ return -EBUSY;
+ }
+ }
+
+ /* perform the insertion of the entry that we have prepared */
+ retval =
+ reiserfs_paste_into_item(th, &path, &entry_key, dir, buffer,
+ paste_size);
+ if (buffer != small_buf)
+ kfree(buffer);
+ if (retval) {
+ reiserfs_check_path(&path);
+ return retval;
+ }
+
+ dir->i_size += paste_size;
+ dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
+ if (!S_ISDIR(inode->i_mode) && visible)
+ /* reiserfs_mkdir or reiserfs_rename will do that by itself */
+ reiserfs_update_sd(th, dir);
+
+ reiserfs_check_path(&path);
+ return 0;
+}
+
+/*
+ * quota utility function, call if you've had to abort after calling
+ * new_inode_init, and have not called reiserfs_new_inode yet.
+ * This should only be called on inodes that do not have stat data
+ * inserted into the tree yet.
+ */
+static int drop_new_inode(struct inode *inode)
+{
+ dquot_drop(inode);
+ make_bad_inode(inode);
+ inode->i_flags |= S_NOQUOTA;
+ iput(inode);
+ return 0;
+}
+
+/*
+ * utility function that does setup for reiserfs_new_inode.
+ * dquot_initialize needs lots of credits so it's better to have it
+ * outside of a transaction, so we had to pull some bits of
+ * reiserfs_new_inode out into this func.
+ */
+static int new_inode_init(struct inode *inode, struct inode *dir, umode_t mode)
+{
+ /*
+ * Make inode invalid - just in case we are going to drop it before
+ * the initialization happens
+ */
+ INODE_PKEY(inode)->k_objectid = 0;
+
+ /*
+ * the quota init calls have to know who to charge the quota to, so
+ * we have to set uid and gid here
+ */
+ inode_init_owner(inode, dir, mode);
+ dquot_initialize(inode);
+ return 0;
+}
+
+static int reiserfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool excl)
+{
+ int retval;
+ struct inode *inode;
+ /*
+ * We need blocks for transaction + (user+group)*(quotas
+ * for new inode + update of quota for directory owner)
+ */
+ int jbegin_count =
+ JOURNAL_PER_BALANCE_CNT * 2 +
+ 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) +
+ REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));
+ struct reiserfs_transaction_handle th;
+ struct reiserfs_security_handle security;
+
+ dquot_initialize(dir);
+
+ if (!(inode = new_inode(dir->i_sb))) {
+ return -ENOMEM;
+ }
+ new_inode_init(inode, dir, mode);
+
+ jbegin_count += reiserfs_cache_default_acl(dir);
+ retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security);
+ if (retval < 0) {
+ drop_new_inode(inode);
+ return retval;
+ }
+ jbegin_count += retval;
+ reiserfs_write_lock(dir->i_sb);
+
+ retval = journal_begin(&th, dir->i_sb, jbegin_count);
+ if (retval) {
+ drop_new_inode(inode);
+ goto out_failed;
+ }
+
+ retval =
+ reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry,
+ inode, &security);
+ if (retval)
+ goto out_failed;
+
+ inode->i_op = &reiserfs_file_inode_operations;
+ inode->i_fop = &reiserfs_file_operations;
+ inode->i_mapping->a_ops = &reiserfs_address_space_operations;
+
+ retval =
+ reiserfs_add_entry(&th, dir, dentry->d_name.name,
+ dentry->d_name.len, inode, 1 /*visible */ );
+ if (retval) {
+ int err;
+ drop_nlink(inode);
+ reiserfs_update_sd(&th, inode);
+ err = journal_end(&th);
+ if (err)
+ retval = err;
+ unlock_new_inode(inode);
+ iput(inode);
+ goto out_failed;
+ }
+ reiserfs_update_inode_transaction(inode);
+ reiserfs_update_inode_transaction(dir);
+
+ unlock_new_inode(inode);
+ d_instantiate(dentry, inode);
+ retval = journal_end(&th);
+
+out_failed:
+ reiserfs_write_unlock(dir->i_sb);
+ return retval;
+}
+
+static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
+ dev_t rdev)
+{
+ int retval;
+ struct inode *inode;
+ struct reiserfs_transaction_handle th;
+ struct reiserfs_security_handle security;
+ /*
+ * We need blocks for transaction + (user+group)*(quotas
+ * for new inode + update of quota for directory owner)
+ */
+ int jbegin_count =
+ JOURNAL_PER_BALANCE_CNT * 3 +
+ 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) +
+ REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));
+
+ if (!new_valid_dev(rdev))
+ return -EINVAL;
+
+ dquot_initialize(dir);
+
+ if (!(inode = new_inode(dir->i_sb))) {
+ return -ENOMEM;
+ }
+ new_inode_init(inode, dir, mode);
+
+ jbegin_count += reiserfs_cache_default_acl(dir);
+ retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security);
+ if (retval < 0) {
+ drop_new_inode(inode);
+ return retval;
+ }
+ jbegin_count += retval;
+ reiserfs_write_lock(dir->i_sb);
+
+ retval = journal_begin(&th, dir->i_sb, jbegin_count);
+ if (retval) {
+ drop_new_inode(inode);
+ goto out_failed;
+ }
+
+ retval =
+ reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry,
+ inode, &security);
+ if (retval) {
+ goto out_failed;
+ }
+
+ inode->i_op = &reiserfs_special_inode_operations;
+ init_special_inode(inode, inode->i_mode, rdev);
+
+ /* FIXME: needed for block and char devices only */
+ reiserfs_update_sd(&th, inode);
+
+ reiserfs_update_inode_transaction(inode);
+ reiserfs_update_inode_transaction(dir);
+
+ retval =
+ reiserfs_add_entry(&th, dir, dentry->d_name.name,
+ dentry->d_name.len, inode, 1 /*visible */ );
+ if (retval) {
+ int err;
+ drop_nlink(inode);
+ reiserfs_update_sd(&th, inode);
+ err = journal_end(&th);
+ if (err)
+ retval = err;
+ unlock_new_inode(inode);
+ iput(inode);
+ goto out_failed;
+ }
+
+ unlock_new_inode(inode);
+ d_instantiate(dentry, inode);
+ retval = journal_end(&th);
+
+out_failed:
+ reiserfs_write_unlock(dir->i_sb);
+ return retval;
+}
+
+static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ int retval;
+ struct inode *inode;
+ struct reiserfs_transaction_handle th;
+ struct reiserfs_security_handle security;
+ /*
+ * We need blocks for transaction + (user+group)*(quotas
+ * for new inode + update of quota for directory owner)
+ */
+ int jbegin_count =
+ JOURNAL_PER_BALANCE_CNT * 3 +
+ 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) +
+ REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));
+
+ dquot_initialize(dir);
+
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+ /*
+ * set flag that new packing locality created and new blocks
+ * for the content of that directory are not displaced yet
+ */
+ REISERFS_I(dir)->new_packing_locality = 1;
+#endif
+ mode = S_IFDIR | mode;
+ if (!(inode = new_inode(dir->i_sb))) {
+ return -ENOMEM;
+ }
+ new_inode_init(inode, dir, mode);
+
+ jbegin_count += reiserfs_cache_default_acl(dir);
+ retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security);
+ if (retval < 0) {
+ drop_new_inode(inode);
+ return retval;
+ }
+ jbegin_count += retval;
+ reiserfs_write_lock(dir->i_sb);
+
+ retval = journal_begin(&th, dir->i_sb, jbegin_count);
+ if (retval) {
+ drop_new_inode(inode);
+ goto out_failed;
+ }
+
+ /*
+ * inc the link count now, so another writer doesn't overflow
+ * it while we sleep later on.
+ */
+ INC_DIR_INODE_NLINK(dir)
+
+ retval = reiserfs_new_inode(&th, dir, mode, NULL /*symlink */ ,
+ old_format_only(dir->i_sb) ?
+ EMPTY_DIR_SIZE_V1 : EMPTY_DIR_SIZE,
+ dentry, inode, &security);
+ if (retval) {
+ DEC_DIR_INODE_NLINK(dir)
+ goto out_failed;
+ }
+
+ reiserfs_update_inode_transaction(inode);
+ reiserfs_update_inode_transaction(dir);
+
+ inode->i_op = &reiserfs_dir_inode_operations;
+ inode->i_fop = &reiserfs_dir_operations;
+
+ /* note, _this_ add_entry will not update dir's stat data */
+ retval =
+ reiserfs_add_entry(&th, dir, dentry->d_name.name,
+ dentry->d_name.len, inode, 1 /*visible */ );
+ if (retval) {
+ int err;
+ clear_nlink(inode);
+ DEC_DIR_INODE_NLINK(dir);
+ reiserfs_update_sd(&th, inode);
+ err = journal_end(&th);
+ if (err)
+ retval = err;
+ unlock_new_inode(inode);
+ iput(inode);
+ goto out_failed;
+ }
+ /* the above add_entry did not update dir's stat data */
+ reiserfs_update_sd(&th, dir);
+
+ unlock_new_inode(inode);
+ d_instantiate(dentry, inode);
+ retval = journal_end(&th);
+out_failed:
+ reiserfs_write_unlock(dir->i_sb);
+ return retval;
+}
+
+static inline int reiserfs_empty_dir(struct inode *inode)
+{
+ /*
+ * we can cheat because an old format dir cannot have
+ * EMPTY_DIR_SIZE, and a new format dir cannot have
+ * EMPTY_DIR_SIZE_V1. So, if the inode is either size,
+ * regardless of disk format version, the directory is empty.
+ */
+ if (inode->i_size != EMPTY_DIR_SIZE &&
+ inode->i_size != EMPTY_DIR_SIZE_V1) {
+ return 0;
+ }
+ return 1;
+}
+
+static int reiserfs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ int retval, err;
+ struct inode *inode;
+ struct reiserfs_transaction_handle th;
+ int jbegin_count;
+ INITIALIZE_PATH(path);
+ struct reiserfs_dir_entry de;
+
+ /*
+ * we will be doing 2 balancings and update 2 stat data, we
+ * change quotas of the owner of the directory and of the owner
+ * of the parent directory. The quota structure is possibly
+ * deleted only on last iput => outside of this transaction
+ */
+ jbegin_count =
+ JOURNAL_PER_BALANCE_CNT * 2 + 2 +
+ 4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
+
+ dquot_initialize(dir);
+
+ reiserfs_write_lock(dir->i_sb);
+ retval = journal_begin(&th, dir->i_sb, jbegin_count);
+ if (retval)
+ goto out_rmdir;
+
+ de.de_gen_number_bit_string = NULL;
+ if ((retval =
+ reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len,
+ &path, &de)) == NAME_NOT_FOUND) {
+ retval = -ENOENT;
+ goto end_rmdir;
+ } else if (retval == IO_ERROR) {
+ retval = -EIO;
+ goto end_rmdir;
+ }
+
+ inode = d_inode(dentry);
+
+ reiserfs_update_inode_transaction(inode);
+ reiserfs_update_inode_transaction(dir);
+
+ if (de.de_objectid != inode->i_ino) {
+ /*
+ * FIXME: compare key of an object and a key found in the entry
+ */
+ retval = -EIO;
+ goto end_rmdir;
+ }
+ if (!reiserfs_empty_dir(inode)) {
+ retval = -ENOTEMPTY;
+ goto end_rmdir;
+ }
+
+ /* cut entry from dir directory */
+ retval = reiserfs_cut_from_item(&th, &path, &de.de_entry_key,
+ dir, NULL, /* page */
+ 0 /*new file size - not used here */ );
+ if (retval < 0)
+ goto end_rmdir;
+
+ if (inode->i_nlink != 2 && inode->i_nlink != 1)
+ reiserfs_error(inode->i_sb, "reiserfs-7040",
+ "empty directory has nlink != 2 (%d)",
+ inode->i_nlink);
+
+ clear_nlink(inode);
+ inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
+ reiserfs_update_sd(&th, inode);
+
+ DEC_DIR_INODE_NLINK(dir)
+ dir->i_size -= (DEH_SIZE + de.de_entrylen);
+ reiserfs_update_sd(&th, dir);
+
+ /* prevent empty directory from getting lost */
+ add_save_link(&th, inode, 0 /* not truncate */ );
+
+ retval = journal_end(&th);
+ reiserfs_check_path(&path);
+out_rmdir:
+ reiserfs_write_unlock(dir->i_sb);
+ return retval;
+
+end_rmdir:
+ /*
+ * we must release path, because we did not call
+ * reiserfs_cut_from_item, or reiserfs_cut_from_item does not
+ * release path if operation was not complete
+ */
+ pathrelse(&path);
+ err = journal_end(&th);
+ reiserfs_write_unlock(dir->i_sb);
+ return err ? err : retval;
+}
+
+static int reiserfs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ int retval, err;
+ struct inode *inode;
+ struct reiserfs_dir_entry de;
+ INITIALIZE_PATH(path);
+ struct reiserfs_transaction_handle th;
+ int jbegin_count;
+ unsigned long savelink;
+
+ dquot_initialize(dir);
+
+ inode = d_inode(dentry);
+
+ /*
+ * in this transaction we can be doing at max two balancings and
+ * update two stat datas, we change quotas of the owner of the
+ * directory and of the owner of the parent directory. The quota
+ * structure is possibly deleted only on iput => outside of
+ * this transaction
+ */
+ jbegin_count =
+ JOURNAL_PER_BALANCE_CNT * 2 + 2 +
+ 4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
+
+ reiserfs_write_lock(dir->i_sb);
+ retval = journal_begin(&th, dir->i_sb, jbegin_count);
+ if (retval)
+ goto out_unlink;
+
+ de.de_gen_number_bit_string = NULL;
+ if ((retval =
+ reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len,
+ &path, &de)) == NAME_NOT_FOUND) {
+ retval = -ENOENT;
+ goto end_unlink;
+ } else if (retval == IO_ERROR) {
+ retval = -EIO;
+ goto end_unlink;
+ }
+
+ reiserfs_update_inode_transaction(inode);
+ reiserfs_update_inode_transaction(dir);
+
+ if (de.de_objectid != inode->i_ino) {
+ /*
+ * FIXME: compare key of an object and a key found in the entry
+ */
+ retval = -EIO;
+ goto end_unlink;
+ }
+
+ if (!inode->i_nlink) {
+ reiserfs_warning(inode->i_sb, "reiserfs-7042",
+ "deleting nonexistent file (%lu), %d",
+ inode->i_ino, inode->i_nlink);
+ set_nlink(inode, 1);
+ }
+
+ drop_nlink(inode);
+
+ /*
+ * we schedule before doing the add_save_link call, save the link
+ * count so we don't race
+ */
+ savelink = inode->i_nlink;
+
+ retval =
+ reiserfs_cut_from_item(&th, &path, &de.de_entry_key, dir, NULL,
+ 0);
+ if (retval < 0) {
+ inc_nlink(inode);
+ goto end_unlink;
+ }
+ inode->i_ctime = CURRENT_TIME_SEC;
+ reiserfs_update_sd(&th, inode);
+
+ dir->i_size -= (de.de_entrylen + DEH_SIZE);
+ dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
+ reiserfs_update_sd(&th, dir);
+
+ if (!savelink)
+ /* prevent file from getting lost */
+ add_save_link(&th, inode, 0 /* not truncate */ );
+
+ retval = journal_end(&th);
+ reiserfs_check_path(&path);
+ reiserfs_write_unlock(dir->i_sb);
+ return retval;
+
+end_unlink:
+ pathrelse(&path);
+ err = journal_end(&th);
+ reiserfs_check_path(&path);
+ if (err)
+ retval = err;
+out_unlink:
+ reiserfs_write_unlock(dir->i_sb);
+ return retval;
+}
+
+static int reiserfs_symlink(struct inode *parent_dir,
+ struct dentry *dentry, const char *symname)
+{
+ int retval;
+ struct inode *inode;
+ char *name;
+ int item_len;
+ struct reiserfs_transaction_handle th;
+ struct reiserfs_security_handle security;
+ int mode = S_IFLNK | S_IRWXUGO;
+ /*
+ * We need blocks for transaction + (user+group)*(quotas for
+ * new inode + update of quota for directory owner)
+ */
+ int jbegin_count =
+ JOURNAL_PER_BALANCE_CNT * 3 +
+ 2 * (REISERFS_QUOTA_INIT_BLOCKS(parent_dir->i_sb) +
+ REISERFS_QUOTA_TRANS_BLOCKS(parent_dir->i_sb));
+
+ dquot_initialize(parent_dir);
+
+ if (!(inode = new_inode(parent_dir->i_sb))) {
+ return -ENOMEM;
+ }
+ new_inode_init(inode, parent_dir, mode);
+
+ retval = reiserfs_security_init(parent_dir, inode, &dentry->d_name,
+ &security);
+ if (retval < 0) {
+ drop_new_inode(inode);
+ return retval;
+ }
+ jbegin_count += retval;
+
+ reiserfs_write_lock(parent_dir->i_sb);
+ item_len = ROUND_UP(strlen(symname));
+ if (item_len > MAX_DIRECT_ITEM_LEN(parent_dir->i_sb->s_blocksize)) {
+ retval = -ENAMETOOLONG;
+ drop_new_inode(inode);
+ goto out_failed;
+ }
+
+ name = kmalloc(item_len, GFP_NOFS);
+ if (!name) {
+ drop_new_inode(inode);
+ retval = -ENOMEM;
+ goto out_failed;
+ }
+ memcpy(name, symname, strlen(symname));
+ padd_item(name, item_len, strlen(symname));
+
+ retval = journal_begin(&th, parent_dir->i_sb, jbegin_count);
+ if (retval) {
+ drop_new_inode(inode);
+ kfree(name);
+ goto out_failed;
+ }
+
+ retval =
+ reiserfs_new_inode(&th, parent_dir, mode, name, strlen(symname),
+ dentry, inode, &security);
+ kfree(name);
+ if (retval) { /* reiserfs_new_inode iputs for us */
+ goto out_failed;
+ }
+
+ reiserfs_update_inode_transaction(inode);
+ reiserfs_update_inode_transaction(parent_dir);
+
+ inode->i_op = &reiserfs_symlink_inode_operations;
+ inode->i_mapping->a_ops = &reiserfs_address_space_operations;
+
+ retval = reiserfs_add_entry(&th, parent_dir, dentry->d_name.name,
+ dentry->d_name.len, inode, 1 /*visible */ );
+ if (retval) {
+ int err;
+ drop_nlink(inode);
+ reiserfs_update_sd(&th, inode);
+ err = journal_end(&th);
+ if (err)
+ retval = err;
+ unlock_new_inode(inode);
+ iput(inode);
+ goto out_failed;
+ }
+
+ unlock_new_inode(inode);
+ d_instantiate(dentry, inode);
+ retval = journal_end(&th);
+out_failed:
+ reiserfs_write_unlock(parent_dir->i_sb);
+ return retval;
+}
+
+static int reiserfs_link(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry)
+{
+ int retval;
+ struct inode *inode = d_inode(old_dentry);
+ struct reiserfs_transaction_handle th;
+ /*
+ * We need blocks for transaction + update of quotas for
+ * the owners of the directory
+ */
+ int jbegin_count =
+ JOURNAL_PER_BALANCE_CNT * 3 +
+ 2 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
+
+ dquot_initialize(dir);
+
+ reiserfs_write_lock(dir->i_sb);
+ if (inode->i_nlink >= REISERFS_LINK_MAX) {
+ /* FIXME: sd_nlink is 32 bit for new files */
+ reiserfs_write_unlock(dir->i_sb);
+ return -EMLINK;
+ }
+
+ /* inc before scheduling so reiserfs_unlink knows we are here */
+ inc_nlink(inode);
+
+ retval = journal_begin(&th, dir->i_sb, jbegin_count);
+ if (retval) {
+ drop_nlink(inode);
+ reiserfs_write_unlock(dir->i_sb);
+ return retval;
+ }
+
+ /* create new entry */
+ retval =
+ reiserfs_add_entry(&th, dir, dentry->d_name.name,
+ dentry->d_name.len, inode, 1 /*visible */ );
+
+ reiserfs_update_inode_transaction(inode);
+ reiserfs_update_inode_transaction(dir);
+
+ if (retval) {
+ int err;
+ drop_nlink(inode);
+ err = journal_end(&th);
+ reiserfs_write_unlock(dir->i_sb);
+ return err ? err : retval;
+ }
+
+ inode->i_ctime = CURRENT_TIME_SEC;
+ reiserfs_update_sd(&th, inode);
+
+ ihold(inode);
+ d_instantiate(dentry, inode);
+ retval = journal_end(&th);
+ reiserfs_write_unlock(dir->i_sb);
+ return retval;
+}
+
+/* de contains information pointing to an entry which */
+static int de_still_valid(const char *name, int len,
+ struct reiserfs_dir_entry *de)
+{
+ struct reiserfs_dir_entry tmp = *de;
+
+ /* recalculate pointer to name and name length */
+ set_de_name_and_namelen(&tmp);
+ /* FIXME: could check more */
+ if (tmp.de_namelen != len || memcmp(name, de->de_name, len))
+ return 0;
+ return 1;
+}
+
+static int entry_points_to_object(const char *name, int len,
+ struct reiserfs_dir_entry *de,
+ struct inode *inode)
+{
+ if (!de_still_valid(name, len, de))
+ return 0;
+
+ if (inode) {
+ if (!de_visible(de->de_deh + de->de_entry_num))
+ reiserfs_panic(inode->i_sb, "vs-7042",
+ "entry must be visible");
+ return (de->de_objectid == inode->i_ino) ? 1 : 0;
+ }
+
+ /* this must be added hidden entry */
+ if (de_visible(de->de_deh + de->de_entry_num))
+ reiserfs_panic(NULL, "vs-7043", "entry must be visible");
+
+ return 1;
+}
+
+/* sets key of objectid the entry has to point to */
+static void set_ino_in_dir_entry(struct reiserfs_dir_entry *de,
+ struct reiserfs_key *key)
+{
+ /* JDM These operations are endian safe - both are le */
+ de->de_deh[de->de_entry_num].deh_dir_id = key->k_dir_id;
+ de->de_deh[de->de_entry_num].deh_objectid = key->k_objectid;
+}
+
+/*
+ * process, that is going to call fix_nodes/do_balance must hold only
+ * one path. If it holds 2 or more, it can get into endless waiting in
+ * get_empty_nodes or its clones
+ */
+static int reiserfs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ int retval;
+ INITIALIZE_PATH(old_entry_path);
+ INITIALIZE_PATH(new_entry_path);
+ INITIALIZE_PATH(dot_dot_entry_path);
+ struct item_head new_entry_ih, old_entry_ih, dot_dot_ih;
+ struct reiserfs_dir_entry old_de, new_de, dot_dot_de;
+ struct inode *old_inode, *new_dentry_inode;
+ struct reiserfs_transaction_handle th;
+ int jbegin_count;
+ umode_t old_inode_mode;
+ unsigned long savelink = 1;
+ struct timespec ctime;
+
+ /*
+ * three balancings: (1) old name removal, (2) new name insertion
+ * and (3) maybe "save" link insertion
+ * stat data updates: (1) old directory,
+ * (2) new directory and (3) maybe old object stat data (when it is
+ * directory) and (4) maybe stat data of object to which new entry
+ * pointed initially and (5) maybe block containing ".." of
+ * renamed directory
+ * quota updates: two parent directories
+ */
+ jbegin_count =
+ JOURNAL_PER_BALANCE_CNT * 3 + 5 +
+ 4 * REISERFS_QUOTA_TRANS_BLOCKS(old_dir->i_sb);
+
+ dquot_initialize(old_dir);
+ dquot_initialize(new_dir);
+
+ old_inode = d_inode(old_dentry);
+ new_dentry_inode = d_inode(new_dentry);
+
+ /*
+ * make sure that oldname still exists and points to an object we
+ * are going to rename
+ */
+ old_de.de_gen_number_bit_string = NULL;
+ reiserfs_write_lock(old_dir->i_sb);
+ retval =
+ reiserfs_find_entry(old_dir, old_dentry->d_name.name,
+ old_dentry->d_name.len, &old_entry_path,
+ &old_de);
+ pathrelse(&old_entry_path);
+ if (retval == IO_ERROR) {
+ reiserfs_write_unlock(old_dir->i_sb);
+ return -EIO;
+ }
+
+ if (retval != NAME_FOUND || old_de.de_objectid != old_inode->i_ino) {
+ reiserfs_write_unlock(old_dir->i_sb);
+ return -ENOENT;
+ }
+
+ old_inode_mode = old_inode->i_mode;
+ if (S_ISDIR(old_inode_mode)) {
+ /*
+ * make sure that directory being renamed has correct ".."
+ * and that its new parent directory has not too many links
+ * already
+ */
+ if (new_dentry_inode) {
+ if (!reiserfs_empty_dir(new_dentry_inode)) {
+ reiserfs_write_unlock(old_dir->i_sb);
+ return -ENOTEMPTY;
+ }
+ }
+
+ /*
+ * directory is renamed, its parent directory will be changed,
+ * so find ".." entry
+ */
+ dot_dot_de.de_gen_number_bit_string = NULL;
+ retval =
+ reiserfs_find_entry(old_inode, "..", 2, &dot_dot_entry_path,
+ &dot_dot_de);
+ pathrelse(&dot_dot_entry_path);
+ if (retval != NAME_FOUND) {
+ reiserfs_write_unlock(old_dir->i_sb);
+ return -EIO;
+ }
+
+ /* inode number of .. must equal old_dir->i_ino */
+ if (dot_dot_de.de_objectid != old_dir->i_ino) {
+ reiserfs_write_unlock(old_dir->i_sb);
+ return -EIO;
+ }
+ }
+
+ retval = journal_begin(&th, old_dir->i_sb, jbegin_count);
+ if (retval) {
+ reiserfs_write_unlock(old_dir->i_sb);
+ return retval;
+ }
+
+ /* add new entry (or find the existing one) */
+ retval =
+ reiserfs_add_entry(&th, new_dir, new_dentry->d_name.name,
+ new_dentry->d_name.len, old_inode, 0);
+ if (retval == -EEXIST) {
+ if (!new_dentry_inode) {
+ reiserfs_panic(old_dir->i_sb, "vs-7050",
+ "new entry is found, new inode == 0");
+ }
+ } else if (retval) {
+ int err = journal_end(&th);
+ reiserfs_write_unlock(old_dir->i_sb);
+ return err ? err : retval;
+ }
+
+ reiserfs_update_inode_transaction(old_dir);
+ reiserfs_update_inode_transaction(new_dir);
+
+ /*
+ * this makes it so an fsync on an open fd for the old name will
+ * commit the rename operation
+ */
+ reiserfs_update_inode_transaction(old_inode);
+
+ if (new_dentry_inode)
+ reiserfs_update_inode_transaction(new_dentry_inode);
+
+ while (1) {
+ /*
+ * look for old name using corresponding entry key
+ * (found by reiserfs_find_entry)
+ */
+ if ((retval =
+ search_by_entry_key(new_dir->i_sb, &old_de.de_entry_key,
+ &old_entry_path,
+ &old_de)) != NAME_FOUND) {
+ pathrelse(&old_entry_path);
+ journal_end(&th);
+ reiserfs_write_unlock(old_dir->i_sb);
+ return -EIO;
+ }
+
+ copy_item_head(&old_entry_ih, tp_item_head(&old_entry_path));
+
+ reiserfs_prepare_for_journal(old_inode->i_sb, old_de.de_bh, 1);
+
+ /* look for new name by reiserfs_find_entry */
+ new_de.de_gen_number_bit_string = NULL;
+ retval =
+ reiserfs_find_entry(new_dir, new_dentry->d_name.name,
+ new_dentry->d_name.len, &new_entry_path,
+ &new_de);
+ /*
+ * reiserfs_add_entry should not return IO_ERROR,
+ * because it is called with essentially same parameters from
+ * reiserfs_add_entry above, and we'll catch any i/o errors
+ * before we get here.
+ */
+ if (retval != NAME_FOUND_INVISIBLE && retval != NAME_FOUND) {
+ pathrelse(&new_entry_path);
+ pathrelse(&old_entry_path);
+ journal_end(&th);
+ reiserfs_write_unlock(old_dir->i_sb);
+ return -EIO;
+ }
+
+ copy_item_head(&new_entry_ih, tp_item_head(&new_entry_path));
+
+ reiserfs_prepare_for_journal(old_inode->i_sb, new_de.de_bh, 1);
+
+ if (S_ISDIR(old_inode->i_mode)) {
+ if ((retval =
+ search_by_entry_key(new_dir->i_sb,
+ &dot_dot_de.de_entry_key,
+ &dot_dot_entry_path,
+ &dot_dot_de)) != NAME_FOUND) {
+ pathrelse(&dot_dot_entry_path);
+ pathrelse(&new_entry_path);
+ pathrelse(&old_entry_path);
+ journal_end(&th);
+ reiserfs_write_unlock(old_dir->i_sb);
+ return -EIO;
+ }
+ copy_item_head(&dot_dot_ih,
+ tp_item_head(&dot_dot_entry_path));
+ /* node containing ".." gets into transaction */
+ reiserfs_prepare_for_journal(old_inode->i_sb,
+ dot_dot_de.de_bh, 1);
+ }
+ /*
+ * we should check seals here, not do
+ * this stuff, yes? Then, having
+ * gathered everything into RAM we
+ * should lock the buffers, yes? -Hans
+ */
+ /*
+ * probably. our rename needs to hold more
+ * than one path at once. The seals would
+ * have to be written to deal with multi-path
+ * issues -chris
+ */
+ /*
+ * sanity checking before doing the rename - avoid races many
+ * of the above checks could have scheduled. We have to be
+ * sure our items haven't been shifted by another process.
+ */
+ if (item_moved(&new_entry_ih, &new_entry_path) ||
+ !entry_points_to_object(new_dentry->d_name.name,
+ new_dentry->d_name.len,
+ &new_de, new_dentry_inode) ||
+ item_moved(&old_entry_ih, &old_entry_path) ||
+ !entry_points_to_object(old_dentry->d_name.name,
+ old_dentry->d_name.len,
+ &old_de, old_inode)) {
+ reiserfs_restore_prepared_buffer(old_inode->i_sb,
+ new_de.de_bh);
+ reiserfs_restore_prepared_buffer(old_inode->i_sb,
+ old_de.de_bh);
+ if (S_ISDIR(old_inode_mode))
+ reiserfs_restore_prepared_buffer(old_inode->
+ i_sb,
+ dot_dot_de.
+ de_bh);
+ continue;
+ }
+ if (S_ISDIR(old_inode_mode)) {
+ if (item_moved(&dot_dot_ih, &dot_dot_entry_path) ||
+ !entry_points_to_object("..", 2, &dot_dot_de,
+ old_dir)) {
+ reiserfs_restore_prepared_buffer(old_inode->
+ i_sb,
+ old_de.de_bh);
+ reiserfs_restore_prepared_buffer(old_inode->
+ i_sb,
+ new_de.de_bh);
+ reiserfs_restore_prepared_buffer(old_inode->
+ i_sb,
+ dot_dot_de.
+ de_bh);
+ continue;
+ }
+ }
+
+ RFALSE(S_ISDIR(old_inode_mode) &&
+ !buffer_journal_prepared(dot_dot_de.de_bh), "");
+
+ break;
+ }
+
+ /*
+ * ok, all the changes can be done in one fell swoop when we
+ * have claimed all the buffers needed.
+ */
+
+ mark_de_visible(new_de.de_deh + new_de.de_entry_num);
+ set_ino_in_dir_entry(&new_de, INODE_PKEY(old_inode));
+ journal_mark_dirty(&th, new_de.de_bh);
+
+ mark_de_hidden(old_de.de_deh + old_de.de_entry_num);
+ journal_mark_dirty(&th, old_de.de_bh);
+ ctime = CURRENT_TIME_SEC;
+ old_dir->i_ctime = old_dir->i_mtime = ctime;
+ new_dir->i_ctime = new_dir->i_mtime = ctime;
+ /*
+ * thanks to Alex Adriaanse <alex_a@caltech.edu> for patch
+ * which adds ctime update of renamed object
+ */
+ old_inode->i_ctime = ctime;
+
+ if (new_dentry_inode) {
+ /* adjust link number of the victim */
+ if (S_ISDIR(new_dentry_inode->i_mode)) {
+ clear_nlink(new_dentry_inode);
+ } else {
+ drop_nlink(new_dentry_inode);
+ }
+ new_dentry_inode->i_ctime = ctime;
+ savelink = new_dentry_inode->i_nlink;
+ }
+
+ if (S_ISDIR(old_inode_mode)) {
+ /* adjust ".." of renamed directory */
+ set_ino_in_dir_entry(&dot_dot_de, INODE_PKEY(new_dir));
+ journal_mark_dirty(&th, dot_dot_de.de_bh);
+
+ /*
+ * there (in new_dir) was no directory, so it got new link
+ * (".." of renamed directory)
+ */
+ if (!new_dentry_inode)
+ INC_DIR_INODE_NLINK(new_dir);
+
+ /* old directory lost one link - ".. " of renamed directory */
+ DEC_DIR_INODE_NLINK(old_dir);
+ }
+ /*
+ * looks like in 2.3.99pre3 brelse is atomic.
+ * so we can use pathrelse
+ */
+ pathrelse(&new_entry_path);
+ pathrelse(&dot_dot_entry_path);
+
+ /*
+ * FIXME: this reiserfs_cut_from_item's return value may screw up
+ * anybody, but it will panic if will not be able to find the
+ * entry. This needs one more clean up
+ */
+ if (reiserfs_cut_from_item
+ (&th, &old_entry_path, &old_de.de_entry_key, old_dir, NULL,
+ 0) < 0)
+ reiserfs_error(old_dir->i_sb, "vs-7060",
+ "couldn't not cut old name. Fsck later?");
+
+ old_dir->i_size -= DEH_SIZE + old_de.de_entrylen;
+
+ reiserfs_update_sd(&th, old_dir);
+ reiserfs_update_sd(&th, new_dir);
+ reiserfs_update_sd(&th, old_inode);
+
+ if (new_dentry_inode) {
+ if (savelink == 0)
+ add_save_link(&th, new_dentry_inode,
+ 0 /* not truncate */ );
+ reiserfs_update_sd(&th, new_dentry_inode);
+ }
+
+ retval = journal_end(&th);
+ reiserfs_write_unlock(old_dir->i_sb);
+ return retval;
+}
+
+/* directories can handle most operations... */
+const struct inode_operations reiserfs_dir_inode_operations = {
+ .create = reiserfs_create,
+ .lookup = reiserfs_lookup,
+ .link = reiserfs_link,
+ .unlink = reiserfs_unlink,
+ .symlink = reiserfs_symlink,
+ .mkdir = reiserfs_mkdir,
+ .rmdir = reiserfs_rmdir,
+ .mknod = reiserfs_mknod,
+ .rename = reiserfs_rename,
+ .setattr = reiserfs_setattr,
+ .setxattr = reiserfs_setxattr,
+ .getxattr = reiserfs_getxattr,
+ .listxattr = reiserfs_listxattr,
+ .removexattr = reiserfs_removexattr,
+ .permission = reiserfs_permission,
+ .get_acl = reiserfs_get_acl,
+ .set_acl = reiserfs_set_acl,
+};
+
+/*
+ * symlink operations.. same as page_symlink_inode_operations, with xattr
+ * stuff added
+ */
+const struct inode_operations reiserfs_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = page_follow_link_light,
+ .put_link = page_put_link,
+ .setattr = reiserfs_setattr,
+ .setxattr = reiserfs_setxattr,
+ .getxattr = reiserfs_getxattr,
+ .listxattr = reiserfs_listxattr,
+ .removexattr = reiserfs_removexattr,
+ .permission = reiserfs_permission,
+};
+
+/*
+ * special file operations.. just xattr/acl stuff
+ */
+const struct inode_operations reiserfs_special_inode_operations = {
+ .setattr = reiserfs_setattr,
+ .setxattr = reiserfs_setxattr,
+ .getxattr = reiserfs_getxattr,
+ .listxattr = reiserfs_listxattr,
+ .removexattr = reiserfs_removexattr,
+ .permission = reiserfs_permission,
+ .get_acl = reiserfs_get_acl,
+ .set_acl = reiserfs_set_acl,
+};
Code Review / kvmfornfv.git / blobdiff