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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/reiserfs/namei.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/reiserfs/namei.c')
-rw-r--r--ANDROID_3.4.5/fs/reiserfs/namei.c1564
1 files changed, 0 insertions, 1564 deletions
diff --git a/ANDROID_3.4.5/fs/reiserfs/namei.c b/ANDROID_3.4.5/fs/reiserfs/namei.c
deleted file mode 100644
index 84e8a69c..00000000
--- a/ANDROID_3.4.5/fs/reiserfs/namei.c
+++ /dev/null
@@ -1,1564 +0,0 @@
-/*
- * 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 = 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 treepath *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;
-
- 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 = 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)
-{
- 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 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)),
- 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 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);
- 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;
- int lock_depth;
- 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);
-
- /*
- * Might be called with or without the write lock, must be careful
- * to not recursively hold it in case we want to release the lock
- * before rescheduling.
- */
- lock_depth = reiserfs_write_lock_once(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_once(dir->i_sb, lock_depth);
- 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_once(dir->i_sb, lock_depth);
- 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 = 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);
-
- 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;
- 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 = 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 */
- 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 = 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);
-
- 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",
- "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,
- 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(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, dir->i_sb, jbegin_count);
- 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(dentry, inode);
- unlock_new_inode(inode);
- retval = journal_end(&th, dir->i_sb, jbegin_count);
-
- 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, dir->i_sb, jbegin_count);
- if (err)
- retval = err;
- unlock_new_inode(inode);
- iput(inode);
- goto out_failed;
- }
-
- d_instantiate(dentry, inode);
- unlock_new_inode(inode);
- retval = journal_end(&th, dir->i_sb, jbegin_count);
-
- 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;
- int lock_depth;
- /* 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;
- lock_depth = reiserfs_write_lock_once(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, dir->i_sb, jbegin_count);
- 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(dentry, inode);
- unlock_new_inode(inode);
- retval = journal_end(&th, dir->i_sb, jbegin_count);
-out_failed:
- reiserfs_write_unlock_once(dir->i_sb, lock_depth);
- 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 = 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_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, 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;
- int depth;
-
- dquot_initialize(dir);
-
- 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. 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);
-
- depth = reiserfs_write_lock_once(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, dir->i_sb, jbegin_count);
- reiserfs_check_path(&path);
- reiserfs_write_unlock_once(dir->i_sb, depth);
- 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_once(dir->i_sb, depth);
- 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;
-
- // 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;
- drop_nlink(inode);
- reiserfs_update_sd(&th, inode);
- err = journal_end(&th, parent_dir->i_sb, jbegin_count);
- if (err)
- retval = err;
- unlock_new_inode(inode);
- iput(inode);
- goto out_failed;
- }
-
- d_instantiate(dentry, inode);
- unlock_new_inode(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(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, 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);
-
- ihold(inode);
- 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(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 = 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");
- }
- } 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)) {
- 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, 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_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, old_dir->i_sb, jbegin_count);
- reiserfs_write_unlock(old_dir->i_sb);
- return retval;
-}
-
-/*
- * directories can handle most operations...
- */
-const 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,
- .get_acl = reiserfs_get_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,
- .get_acl = reiserfs_get_acl,
-
-};
-
-/*
- * 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,
-};