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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/reiserfs/namei.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
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.c | 1564 |
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, -}; |