diff options
Diffstat (limited to 'fs/reiserfs/namei.c')
| -rw-r--r-- | fs/reiserfs/namei.c | 1491 |
1 files changed, 1491 insertions, 0 deletions
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c new file mode 100644 index 000000000000..80e92d9b81cb --- /dev/null +++ b/fs/reiserfs/namei.c @@ -0,0 +1,1491 @@ +/* + * 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/config.h> +#include <linux/time.h> +#include <linux/bitops.h> +#include <linux/reiserfs_fs.h> +#include <linux/reiserfs_acl.h> +#include <linux/reiserfs_xattr.h> +#include <linux/smp_lock.h> +#include <linux/quotaops.h> + +#define INC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) { i->i_nlink++; if (i->i_nlink >= REISERFS_LINK_MAX) i->i_nlink=1; } +#define DEC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) i->i_nlink--; + +// 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 = I_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 path * path) +{ + de->de_bh = get_last_bh (path); + de->de_ih = get_ih (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; + + if (de->de_entry_num >= ih_entry_count (de->de_ih)) + BUG (); + + 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 = B_I_PITEM (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) +{ + if (de->de_entry_num >= ih_entry_count (de->de_ih)) + BUG (); + 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; + + if (de->de_entry_num >= ih_entry_count (de->de_ih)) + BUG (); + + /* 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 path * 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_warning (sb, "vs-7000: search_by_entry_key: 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_warning (sb, "vs-7002: search_by_entry_key: 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: search_by_entry_key: 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 componen t 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 == I_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 --) { + if (GET_HASH_VALUE (deh_offset (deh)) != + GET_HASH_VALUE (cpu_key_k_offset (key))) { + // hash value does not match, no need to check whole name + 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)), (unsigned long *)de->de_gen_number_bit_string); + + // calculate pointer to name and namelen + de->de_entry_num = i; + set_de_name_and_namelen (de); + + if ((retval = reiserfs_match (de, name, namelen)) != NAME_NOT_FOUND) { + // de's de_name, de_namelen, de_recordlen are set. Fill the rest: + + // 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 path * 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_warning (dir->i_sb, "zam-7001: io error in %s", + __FUNCTION__); + return IO_ERROR; + } + + /* compare names for all entries having given hash value */ + retval = linear_search_in_dir_item (&key_to_search, de, name, namelen); + if (retval != GOTO_PREVIOUS_ITEM) { + /* there is no need to scan directory anymore. Given entry found or does not exist */ + 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, struct nameidata *nd) +{ + 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) { + /* Hide the .reiserfs_priv directory */ + if (reiserfs_xattrs (dir->i_sb) && + !old_format_only(dir->i_sb) && + REISERFS_SB(dir->i_sb)->priv_root && + REISERFS_SB(dir->i_sb)->priv_root->d_inode && + de.de_objectid == le32_to_cpu (INODE_PKEY(REISERFS_SB(dir->i_sb)->priv_root->d_inode)->k_objectid)) { + reiserfs_write_unlock (dir->i_sb); + return ERR_PTR (-EACCES); + } + + 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); + } + + /* Propogate the priv_object flag so we know we're in the priv tree */ + if (is_reiserfs_priv_object (dir)) + reiserfs_mark_inode_private (inode); + } + reiserfs_write_unlock(dir->i_sb); + if ( retval == IO_ERROR ) { + return ERR_PTR(-EIO); + } + + if (inode) + return d_splice_alias(inode, dentry); + + d_add(dentry, inode); + return NULL; +} + + +/* +** 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 dentry *parent; + struct inode *dir = child->d_inode ; + + + 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); + + if (!inode || IS_ERR(inode)) { + return ERR_PTR(-EACCES); + } + parent = d_alloc_anon(inode); + if (!parent) { + iput(inode); + parent = ERR_PTR(-ENOMEM); + } + return parent; +} + + +/* 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; + int bit_string [MAX_GENERATION_NUMBER / (sizeof(int) * 8) + 1]; + int gen_number; + char small_buf[32+DEH_SIZE] ; /* 48 bytes now and we avoid kmalloc + if we create file with short name */ + 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 = reiserfs_kmalloc (buflen, GFP_NOFS, dir->i_sb); + if (buffer == 0) + 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 */ + deh->deh_dir_id = INODE_PKEY (inode)->k_dir_id; /* safe: k_dir_id is le */ + deh->deh_objectid = INODE_PKEY (inode)->k_objectid; /* safe: k_objectid is le */ + + /* 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 = (char *)bit_string; + retval = reiserfs_find_entry (dir, name, namelen, &path, &de); + if( retval != NAME_NOT_FOUND ) { + if (buffer != small_buf) + reiserfs_kfree (buffer, buflen, dir->i_sb); + pathrelse (&path); + + if ( retval == IO_ERROR ) { + return -EIO; + } + + if (retval != NAME_FOUND) { + reiserfs_warning (dir->i_sb, "zam-7002:%s: \"reiserfs_find_entry\" " + "has returned unexpected value (%d)", + __FUNCTION__, retval); + } + + return -EEXIST; + } + + gen_number = find_first_zero_bit ((unsigned long *)bit_string, MAX_GENERATION_NUMBER + 1); + if (gen_number > MAX_GENERATION_NUMBER) { + /* there is no free generation number */ + reiserfs_warning (dir->i_sb, "reiserfs_add_entry: Congratulations! we have got hash function screwed up"); + if (buffer != small_buf) + reiserfs_kfree (buffer, buflen, dir->i_sb); + 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 ); + + if (gen_number != 0) { /* we need to re-search for the insertion point */ + if (search_by_entry_key (dir->i_sb, &entry_key, &path, &de) != NAME_NOT_FOUND) { + reiserfs_warning (dir->i_sb, "vs-7032: reiserfs_add_entry: " + "entry with this key (%K) already exists", + &entry_key); + + if (buffer != small_buf) + reiserfs_kfree (buffer, buflen, dir->i_sb); + 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) + reiserfs_kfree (buffer, buflen, dir->i_sb); + 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_INIT 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, int mode) { + + /* the quota init calls have to know who to charge the quota to, so + ** we have to set uid and gid here + */ + inode->i_uid = current->fsuid; + inode->i_mode = mode; + + if (dir->i_mode & S_ISGID) { + inode->i_gid = dir->i_gid; + if (S_ISDIR(mode)) + inode->i_mode |= S_ISGID; + } else { + inode->i_gid = current->fsgid; + } + DQUOT_INIT(inode); + return 0 ; +} + +static int reiserfs_create (struct inode * dir, struct dentry *dentry, int mode, + struct nameidata *nd) +{ + 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+REISERFS_QUOTA_TRANS_BLOCKS); + struct reiserfs_transaction_handle th ; + int locked; + + if (!(inode = new_inode(dir->i_sb))) { + return -ENOMEM ; + } + new_inode_init(inode, dir, mode); + + locked = reiserfs_cache_default_acl (dir); + + reiserfs_write_lock(dir->i_sb); + + if (locked) + reiserfs_write_lock_xattrs (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, 0, 0/*i_size*/, dentry, inode); + if (retval) + goto out_failed; + + if (locked) { + reiserfs_write_unlock_xattrs (dir->i_sb); + locked = 0; + } + + 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; + inode->i_nlink--; + reiserfs_update_sd (&th, inode); + err = journal_end(&th, dir->i_sb, jbegin_count) ; + if (err) + retval = err; + iput (inode); + goto out_failed; + } + reiserfs_update_inode_transaction(inode) ; + reiserfs_update_inode_transaction(dir) ; + + d_instantiate(dentry, inode); + retval = journal_end(&th, dir->i_sb, jbegin_count) ; + +out_failed: + if (locked) + reiserfs_write_unlock_xattrs (dir->i_sb); + reiserfs_write_unlock(dir->i_sb); + return retval; +} + + +static int reiserfs_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_t rdev) +{ + int retval; + struct inode * inode; + struct reiserfs_transaction_handle th ; + /* 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+REISERFS_QUOTA_TRANS_BLOCKS); + int locked; + + if (!new_valid_dev(rdev)) + return -EINVAL; + + if (!(inode = new_inode(dir->i_sb))) { + return -ENOMEM ; + } + new_inode_init(inode, dir, mode); + + locked = reiserfs_cache_default_acl (dir); + + reiserfs_write_lock(dir->i_sb); + + if (locked) + reiserfs_write_lock_xattrs (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); + if (retval) { + goto out_failed; + } + + if (locked) { + reiserfs_write_unlock_xattrs (dir->i_sb); + locked = 0; + } + + + 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; + inode->i_nlink--; + reiserfs_update_sd (&th, inode); + err = journal_end(&th, dir->i_sb, jbegin_count) ; + if (err) + retval = err; + iput (inode); + goto out_failed; + } + + d_instantiate(dentry, inode); + retval = journal_end(&th, dir->i_sb, jbegin_count) ; + +out_failed: + if (locked) + reiserfs_write_unlock_xattrs (dir->i_sb); + reiserfs_write_unlock(dir->i_sb); + return retval; +} + + +static int reiserfs_mkdir (struct inode * dir, struct dentry *dentry, int mode) +{ + int retval; + struct inode * inode; + struct reiserfs_transaction_handle th ; + /* 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+REISERFS_QUOTA_TRANS_BLOCKS); + int locked; + +#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); + + locked = reiserfs_cache_default_acl (dir); + + reiserfs_write_lock(dir->i_sb); + if (locked) + reiserfs_write_lock_xattrs (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); + if (retval) { + dir->i_nlink-- ; + goto out_failed; + } + + if (locked) { + reiserfs_write_unlock_xattrs (dir->i_sb); + locked = 0; + } + + 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; + inode->i_nlink = 0; + DEC_DIR_INODE_NLINK(dir); + reiserfs_update_sd (&th, inode); + err = journal_end(&th, dir->i_sb, jbegin_count) ; + if (err) + retval = err; + iput (inode); + goto out_failed; + } + + // the above add_entry did not update dir's stat data + reiserfs_update_sd (&th, dir); + + d_instantiate(dentry, inode); + retval = journal_end(&th, dir->i_sb, jbegin_count) ; +out_failed: + if (locked) + reiserfs_write_unlock_xattrs (dir->i_sb); + 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 */ + jbegin_count = JOURNAL_PER_BALANCE_CNT * 2 + 2 + 2 * (REISERFS_QUOTA_INIT_BLOCKS+REISERFS_QUOTA_TRANS_BLOCKS); + + 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 = dentry->d_inode; + + 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_warning (inode->i_sb, "%s: empty directory has nlink " + "!= 2 (%d)", __FUNCTION__, inode->i_nlink); + + inode->i_nlink = 0; + 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, dir->i_sb, jbegin_count) ; + 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, dir->i_sb, jbegin_count) ; + 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; + + inode = dentry->d_inode; + + /* 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 */ + jbegin_count = JOURNAL_PER_BALANCE_CNT * 2 + 2 + 2 * (REISERFS_QUOTA_INIT_BLOCKS+REISERFS_QUOTA_TRANS_BLOCKS); + + 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, "%s: deleting nonexistent file " + "(%s:%lu), %d", __FUNCTION__, + reiserfs_bdevname (inode->i_sb), inode->i_ino, + inode->i_nlink); + inode->i_nlink = 1; + } + + inode->i_nlink--; + + /* + * 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) { + inode->i_nlink++; + 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, dir->i_sb, jbegin_count) ; + reiserfs_check_path(&path) ; + reiserfs_write_unlock(dir->i_sb); + return retval; + + end_unlink: + pathrelse (&path); + err = journal_end(&th, dir->i_sb, jbegin_count) ; + 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 ; + 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+REISERFS_QUOTA_TRANS_BLOCKS); + + if (!(inode = new_inode(parent_dir->i_sb))) { + return -ENOMEM ; + } + new_inode_init(inode, parent_dir, mode); + + 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 = reiserfs_kmalloc (item_len, GFP_NOFS, parent_dir->i_sb); + if (!name) { + drop_new_inode(inode); + retval = -ENOMEM; + goto out_failed; + } + memcpy (name, symname, strlen (symname)); + padd_item (name, item_len, strlen (symname)); + + /* We would inherit the default ACL here, but symlinks don't get ACLs */ + + retval = journal_begin(&th, parent_dir->i_sb, jbegin_count) ; + if (retval) { + drop_new_inode (inode); + reiserfs_kfree (name, item_len, parent_dir->i_sb); + goto out_failed; + } + + retval = reiserfs_new_inode (&th, parent_dir, mode, name, strlen (symname), + dentry, inode); + reiserfs_kfree (name, item_len, parent_dir->i_sb); + 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; + + // must be sure this inode is written with this transaction + // + //reiserfs_update_sd (&th, inode, READ_BLOCKS); + + retval = reiserfs_add_entry (&th, parent_dir, dentry->d_name.name, + dentry->d_name.len, inode, 1/*visible*/); + if (retval) { + int err; + inode->i_nlink--; + reiserfs_update_sd (&th, inode); + err = journal_end(&th, parent_dir->i_sb, jbegin_count) ; + if (err) + retval = err; + iput (inode); + goto out_failed; + } + + d_instantiate(dentry, inode); + retval = journal_end(&th, parent_dir->i_sb, jbegin_count) ; +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 = old_dentry->d_inode; + 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; + + 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; + } + if (inode->i_nlink == 0) { + reiserfs_write_unlock(dir->i_sb); + return -ENOENT; + } + + /* inc before scheduling so reiserfs_unlink knows we are here */ + inode->i_nlink++; + + retval = journal_begin(&th, dir->i_sb, jbegin_count) ; + if (retval) { + inode->i_nlink--; + 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; + inode->i_nlink--; + err = journal_end(&th, dir->i_sb, jbegin_count) ; + reiserfs_write_unlock(dir->i_sb); + return err ? err : retval; + } + + inode->i_ctime = CURRENT_TIME_SEC; + reiserfs_update_sd (&th, inode); + + atomic_inc(&inode->i_count) ; + d_instantiate(dentry, inode); + retval = journal_end(&th, dir->i_sb, jbegin_count) ; + 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 (NULL, "vs-7042: entry_points_to_object: 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_points_to_object: 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_inode = old_dentry->d_inode; + new_dentry_inode = new_dentry->d_inode; + + // 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\n"); + } + } else if (retval) { + int err = journal_end(&th, old_dir->i_sb, jbegin_count) ; + 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, old_dir->i_sb, jbegin_count); + reiserfs_write_unlock(old_dir->i_sb); + return -EIO; + } + + copy_item_head(&old_entry_ih, get_ih(&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, old_dir->i_sb, jbegin_count); + reiserfs_write_unlock(old_dir->i_sb); + return -EIO; + } + + copy_item_head(&new_entry_ih, get_ih(&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, old_dir->i_sb, jbegin_count); + reiserfs_write_unlock(old_dir->i_sb); + return -EIO; + } + copy_item_head(&dot_dot_ih, get_ih(&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, old_dir->i_sb, new_de.de_bh); + + mark_de_hidden (old_de.de_deh + old_de.de_entry_num); + journal_mark_dirty (&th, old_dir->i_sb, 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)) { + new_dentry_inode->i_nlink = 0; + } else { + new_dentry_inode->i_nlink--; + } + 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, new_dir->i_sb, dot_dot_de.de_bh); + + if (!new_dentry_inode) + /* there (in new_dir) was no directory, so it got new link + (".." of renamed directory) */ + 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_warning (old_dir->i_sb, "vs-7060: reiserfs_rename: 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, old_dir->i_sb, jbegin_count) ; + reiserfs_write_unlock(old_dir->i_sb); + return retval; +} + +/* + * directories can handle most operations... + */ +struct inode_operations reiserfs_dir_inode_operations = { + //&reiserfs_dir_operations, /* default_file_ops */ + .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, +}; + +/* + * symlink operations.. same as page_symlink_inode_operations, with xattr + * stuff added + */ +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 + */ +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, + +}; |
