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