diff options
Diffstat (limited to 'fs/reiserfs/namei.c')
| -rw-r--r-- | fs/reiserfs/namei.c | 1682 |
1 files changed, 1682 insertions, 0 deletions
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c new file mode 100644 index 000000000..959a066b7 --- /dev/null +++ b/fs/reiserfs/namei.c @@ -0,0 +1,1682 @@ +/* + * 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. Also clear IOP_XATTR + * since we don't have xattrs on xattr files. + */ + if (IS_PRIVATE(dir)) { + inode->i_flags |= S_PRIVATE; + inode->i_opflags &= ~IOP_XATTR; + } + } + 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(dir); + 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); + return dquot_initialize(inode); +} + +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; + + retval = dquot_initialize(dir); + if (retval) + return retval; + + if (!(inode = new_inode(dir->i_sb))) { + return -ENOMEM; + } + retval = new_inode_init(inode, dir, mode); + if (retval) { + drop_new_inode(inode); + return retval; + } + + 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); + + d_instantiate_new(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)); + + retval = dquot_initialize(dir); + if (retval) + return retval; + + if (!(inode = new_inode(dir->i_sb))) { + return -ENOMEM; + } + retval = new_inode_init(inode, dir, mode); + if (retval) { + drop_new_inode(inode); + return retval; + } + + 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; + } + + d_instantiate_new(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)); + + retval = dquot_initialize(dir); + if (retval) + return retval; + +#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; + } + retval = new_inode_init(inode, dir, mode); + if (retval) { + drop_new_inode(inode); + return retval; + } + + 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); + + d_instantiate_new(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); + + retval = dquot_initialize(dir); + if (retval) + return retval; + + 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(dir); + 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; + + retval = dquot_initialize(dir); + if (retval) + return retval; + + 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(inode); + reiserfs_update_sd(&th, inode); + + dir->i_size -= (de.de_entrylen + DEH_SIZE); + dir->i_ctime = dir->i_mtime = current_time(dir); + 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)); + + retval = dquot_initialize(parent_dir); + if (retval) + return retval; + + if (!(inode = new_inode(parent_dir->i_sb))) { + return -ENOMEM; + } + retval = new_inode_init(inode, parent_dir, mode); + if (retval) { + drop_new_inode(inode); + return retval; + } + + 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_nohighmem(inode); + 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; + } + + d_instantiate_new(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); + + retval = dquot_initialize(dir); + if (retval) + return retval; + + 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(inode); + 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, + unsigned int flags) +{ + 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 timespec64 ctime; + + if (flags & ~RENAME_NOREPLACE) + return -EINVAL; + + /* + * 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); + + retval = dquot_initialize(old_dir); + if (retval) + return retval; + retval = dquot_initialize(new_dir); + if (retval) + return retval; + + 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(old_dir); + 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, + .listxattr = reiserfs_listxattr, + .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 = { + .get_link = page_get_link, + .setattr = reiserfs_setattr, + .listxattr = reiserfs_listxattr, + .permission = reiserfs_permission, +}; + +/* + * special file operations.. just xattr/acl stuff + */ +const struct inode_operations reiserfs_special_inode_operations = { + .setattr = reiserfs_setattr, + .listxattr = reiserfs_listxattr, + .permission = reiserfs_permission, + .get_acl = reiserfs_get_acl, + .set_acl = reiserfs_set_acl, +}; |