//
// a portion of this function, particularly the VFS interface portion,
// was derived from minix or ext2's analog and evolved as the
// prototype did. You should be able to tell which portion by looking
// at the ext2 code and comparing. It's subfunctions contain no code
// used as a template unless they are so labeled.
//
static int reiserfs_remount (struct super_block * s, int * flags, char * data)
{
struct reiserfs_super_block * rs;
struct reiserfs_transaction_handle th ;
unsigned long blocks;
unsigned long mount_options;
rs = SB_DISK_SUPER_BLOCK (s);
if (!parse_options(data, &mount_options, &blocks))
return 0;
if(blocks) {
int rc = reiserfs_resize(s, blocks);
if (rc != 0)
return rc;
}
if ((unsigned long)(*flags & MS_RDONLY) == (s->s_flags & MS_RDONLY)) {
/* there is nothing to do to remount read-only fs as read-only fs */
return 0;
}
if (*flags & MS_RDONLY) {
/* try to remount file system with read-only permissions */
if (sb_state(rs) == REISERFS_VALID_FS || s->u.reiserfs_sb.s_mount_state != REISERFS_VALID_FS) {
return 0;
}
journal_begin(&th, s, 10) ;
/* Mounting a rw partition read-only. */
reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
set_sb_state( rs, s->u.reiserfs_sb.s_mount_state );
journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
s->s_dirt = 0;
} else {
s->u.reiserfs_sb.s_mount_state = sb_state(rs) ;
s->s_flags &= ~MS_RDONLY ; /* now it is safe to call journal_begin */
journal_begin(&th, s, 10) ;
/* Mount a partition which is read-only, read-write */
reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
s->u.reiserfs_sb.s_mount_state = sb_state(rs);
s->s_flags &= ~MS_RDONLY;
set_sb_state( rs, REISERFS_ERROR_FS );
/* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
s->s_dirt = 0;
s->u.reiserfs_sb.s_mount_state = REISERFS_VALID_FS ;
}
/* this will force a full flush of all journal lists */
SB_JOURNAL(s)->j_must_wait = 1 ;
journal_end(&th, s, 10) ;
if (!( *flags & MS_RDONLY ) )
finish_unfinished( s );
return 0;
}
int reiserfs_rename (
struct inode * old_dir, struct dentry *old_dentry,
struct inode * new_dir, struct dentry *new_dentry
)
{
static struct wait_queue * wait = NULL;
static int lock = 0;
int result;
int windex ;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
while (lock)
sleep_on(&wait);
lock = 1;
journal_begin(&th, old_dir->i_sb, jbegin_count) ;
windex = push_journal_writer("reiesrfs_rename") ;
/* we are trusting if_in_ram_update_sd to update the transaction
** info in each inode as they get chagned
*/
result = do_reiserfs_rename (&th, old_dir, old_dentry, new_dir, new_dentry);
pop_journal_writer(windex) ;
journal_end(&th, old_dir->i_sb, jbegin_count) ;
lock = 0;
wake_up(&wait);
return result;
}
static int reiserfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
int retval;
struct inode *inode = d_inode(old_dentry);
struct reiserfs_transaction_handle th;
/*
* We need blocks for transaction + update of quotas for
* the owners of the directory
*/
int jbegin_count =
JOURNAL_PER_BALANCE_CNT * 3 +
2 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
retval = dquot_initialize(dir);
if (retval)
return retval;
reiserfs_write_lock(dir->i_sb);
if (inode->i_nlink >= REISERFS_LINK_MAX) {
/* FIXME: sd_nlink is 32 bit for new files */
reiserfs_write_unlock(dir->i_sb);
return -EMLINK;
}
/* inc before scheduling so reiserfs_unlink knows we are here */
inc_nlink(inode);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
if (retval) {
drop_nlink(inode);
reiserfs_write_unlock(dir->i_sb);
return retval;
}
/* create new entry */
retval =
reiserfs_add_entry(&th, dir, dentry->d_name.name,
dentry->d_name.len, inode, 1 /*visible */ );
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(dir);
if (retval) {
int err;
drop_nlink(inode);
err = journal_end(&th);
reiserfs_write_unlock(dir->i_sb);
return err ? err : retval;
}
inode->i_ctime = current_time(inode);
reiserfs_update_sd(&th, inode);
ihold(inode);
d_instantiate(dentry, inode);
retval = journal_end(&th);
reiserfs_write_unlock(dir->i_sb);
return retval;
}
void reiserfs_write_super (struct super_block * s)
{
int dirty = 0 ;
if (!(s->s_flags & MS_RDONLY)) {
#if 0 /* journal victim */
rs = SB_DISK_SUPER_BLOCK (s);
/*
* if reiserfs was mounted with read-write permissions make file
* system state not valid so that if we crash without doing a
* clean umount we know that we must run file system
* checker. umount will mark it valid if it does a clean umount
*/
if (le16_to_cpu (rs->s_state) == REISERFS_VALID_FS) {
rs->s_state = cpu_to_le16 (REISERFS_ERROR_FS);
/* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
journal_begin(&th, s, 1) ;
journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)) ;
journal_end(&th, s, 1) ;
}
#endif
dirty = flush_old_commits(s, 1) ;
}
s->s_dirt = dirty;
}
/* We need to start a transaction to maintain lock ordering */
int reiserfs_xattr_set(struct inode *inode, const char *name,
const void *buffer, size_t buffer_size, int flags)
{
struct reiserfs_transaction_handle th;
int error, error2;
size_t jbegin_count = reiserfs_xattr_nblocks(inode, buffer_size);
if (!(flags & XATTR_REPLACE))
jbegin_count += reiserfs_xattr_jcreate_nblocks(inode);
reiserfs_write_lock(inode->i_sb);
error = journal_begin(&th, inode->i_sb, jbegin_count);
if (error) {
reiserfs_write_unlock(inode->i_sb);
return error;
}
error = reiserfs_xattr_set_handle(&th, inode, name,
buffer, buffer_size, flags);
error2 = journal_end(&th, inode->i_sb, jbegin_count);
if (error == 0)
error = error2;
reiserfs_write_unlock(inode->i_sb);
return error;
}
int reiserfs_link (struct dentry * old_dentry, struct inode * dir, struct dentry * dentry)
{
struct inode *inode = old_dentry->d_inode;
struct path path_to_entry;
struct reiserfs_dir_entry de;
int error;
int windex ;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
init_path (&path_to_entry);
/* object must not be directory */
if (S_ISDIR(inode->i_mode)) {
return -EPERM;
}
/* file has too many links */
if (inode->i_nlink >= REISERFS_LINK_MAX) {
return -EMLINK;
}
journal_begin(&th, dir->i_sb, jbegin_count) ;
windex = push_journal_writer("reiserfs_link") ;
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
de.de_gen_number_bit_string = 0;
if (reiserfs_find_entry (dir, dentry->d_name.name, dentry->d_name.len, &path_to_entry, &de) == POSITION_FOUND) {
pathrelse (&path_to_entry);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return -EEXIST;
}
pathrelse (&path_to_entry);
/* free preserve list if we should */
/* maybe_free_preserve_list (dir->i_sb);*/
/* create new entry */
error = reiserfs_add_entry (&th, dir, dentry->d_name.name, dentry->d_name.len, INODE_PKEY (inode), &de, 1);
if (error) {
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return error;
}
inode->i_nlink++;
inode->i_ctime = CURRENT_TIME;
if_in_ram_update_sd (&th, inode);
if_in_ram_update_sd (&th, dir);
inode->i_count++;
d_instantiate(dentry, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return 0;
}
int reiserfs_remount (struct super_block * s, int * flags, char * data)
{
struct reiserfs_super_block * rs;
struct reiserfs_transaction_handle th ;
unsigned long blocks;
unsigned long mount_options;
rs = SB_DISK_SUPER_BLOCK (s);
if (!parse_options(data, &mount_options, &blocks))
return 0;
if(blocks)
reiserfs_resize(s, blocks);
journal_begin(&th, s, 10) ;
if ((unsigned long)(*flags & MS_RDONLY) == (s->s_flags & MS_RDONLY)) {
/* there is nothing to do to remount read-only fs as read-only fs */
journal_end(&th, s, 10) ;
return 0;
}
if (*flags & MS_RDONLY) {
/* try to remount file system with read-only permissions */
if (le16_to_cpu (rs->s_state) == REISERFS_VALID_FS ||
s->u.reiserfs_sb.s_mount_state != REISERFS_VALID_FS) {
journal_end(&th, s, 10) ;
return 0;
}
/* Mounting a rw partition read-only. */
rs->s_state = cpu_to_le16 (s->u.reiserfs_sb.s_mount_state);
/* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); journal victim */
journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
s->s_dirt = 0;
} else {
/* Mount a partition which is read-only, read-write */
s->u.reiserfs_sb.s_mount_state = le16_to_cpu (rs->s_state);
s->s_flags &= ~MS_RDONLY;
rs->s_state = cpu_to_le16 (REISERFS_ERROR_FS);
/* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
s->s_dirt = 0;
s->u.reiserfs_sb.s_mount_state = REISERFS_VALID_FS ;
if (test_bit(NOTAIL, &mount_options)) {
set_bit(NOTAIL, &(s->u.reiserfs_sb.s_mount_opt)) ;
}
/* check state, which file system had when remounting read-write */
#if 0 /* journal victim */
if (s->u.reiserfs_sb.s_mount_state != REISERFS_VALID_FS)
printk ("REISERFS: remounting unchecked fs, "
"running reiserfsck is recommended\n");
#endif
}
/* this will force a full flush of all journal lists */
SB_JOURNAL(s)->j_must_wait = 1 ;
journal_end(&th, s, 10) ;
return 0;
}
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);
reiserfs_write_lock(dir->i_sb);
if (inode->i_nlink >= REISERFS_LINK_MAX) {
//FIXME: sd_nlink is 32 bit for new files
reiserfs_write_unlock(dir->i_sb);
return -EMLINK;
}
if (inode->i_nlink == 0) {
reiserfs_write_unlock(dir->i_sb);
return -ENOENT;
}
/* inc before scheduling so reiserfs_unlink knows we are here */
inode->i_nlink++;
retval = journal_begin(&th, dir->i_sb, jbegin_count);
if (retval) {
inode->i_nlink--;
reiserfs_write_unlock(dir->i_sb);
return retval;
}
/* create new entry */
retval =
reiserfs_add_entry(&th, dir, dentry->d_name.name,
dentry->d_name.len, inode, 1 /*visible */ );
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(dir);
if (retval) {
int err;
inode->i_nlink--;
err = journal_end(&th, dir->i_sb, jbegin_count);
reiserfs_write_unlock(dir->i_sb);
return err ? err : retval;
}
inode->i_ctime = CURRENT_TIME_SEC;
reiserfs_update_sd(&th, inode);
atomic_inc(&inode->i_count);
d_instantiate(dentry, inode);
retval = journal_end(&th, dir->i_sb, jbegin_count);
reiserfs_write_unlock(dir->i_sb);
return retval;
}
static int reiserfs_create (struct inode * dir, struct dentry *dentry, int mode,
struct nameidata *nd)
{
int retval;
struct inode * inode;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 2 ;
struct reiserfs_transaction_handle th ;
int locked;
if (!(inode = new_inode(dir->i_sb))) {
return -ENOMEM ;
}
retval = new_inode_init(inode, dir, mode);
if (retval)
return retval;
locked = reiserfs_cache_default_acl (dir);
reiserfs_write_lock(dir->i_sb);
if (locked)
reiserfs_write_lock_xattrs (dir->i_sb);
journal_begin(&th, dir->i_sb, jbegin_count) ;
retval = reiserfs_new_inode (&th, dir, mode, 0, 0/*i_size*/, dentry, inode);
if (locked)
reiserfs_write_unlock_xattrs (dir->i_sb);
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) {
inode->i_nlink--;
reiserfs_update_sd (&th, inode);
journal_end(&th, dir->i_sb, jbegin_count) ;
iput (inode);
goto out_failed;
}
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
d_instantiate(dentry, inode);
journal_end(&th, dir->i_sb, jbegin_count) ;
out_failed:
reiserfs_write_unlock(dir->i_sb);
return retval;
}
/* this is used to delete "save link" when there are no items of a
file it points to. It can either happen if unlink is completed but
"save unlink" removal, or if file has both unlink and truncate
pending and as unlink completes first (because key of "save link"
protecting unlink is bigger that a key lf "save link" which
protects truncate), so there left no items to make truncate
completion on */
static void remove_save_link_only (struct super_block * s, struct key * key, int oid_free)
{
struct reiserfs_transaction_handle th;
/* we are going to do one balancing */
journal_begin (&th, s, JOURNAL_PER_BALANCE_CNT);
reiserfs_delete_solid_item (&th, key);
if (oid_free)
/* removals are protected by direct items */
reiserfs_release_objectid (&th, le32_to_cpu (key->k_objectid));
journal_end (&th, s, JOURNAL_PER_BALANCE_CNT);
}
//
// a portion of this function, particularly the VFS interface portion,
// was derived from minix or ext2's analog and evolved as the
// prototype did. You should be able to tell which portion by looking
// at the ext2 code and comparing. It's subfunctions contain no code
// used as a template unless they are so labeled.
//
static void reiserfs_write_super_lockfs (struct super_block * s)
{
int dirty = 0 ;
struct reiserfs_transaction_handle th ;
lock_kernel() ;
if (!(s->s_flags & MS_RDONLY)) {
journal_begin(&th, s, 1) ;
reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
reiserfs_block_writes(&th) ;
journal_end(&th, s, 1) ;
}
s->s_dirt = dirty;
unlock_kernel() ;
}
static void reiserfs_put_super (struct super_block * s)
{
int i;
struct reiserfs_transaction_handle th ;
/* change file system state to current state if it was mounted with read-write permissions */
if (!(s->s_flags & MS_RDONLY)) {
journal_begin(&th, s, 10) ;
reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
set_sb_state( SB_DISK_SUPER_BLOCK(s), s->u.reiserfs_sb.s_mount_state );
journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
}
/* note, journal_release checks for readonly mount, and can decide not
** to do a journal_end
*/
journal_release(&th, s) ;
for (i = 0; i < SB_BMAP_NR (s); i ++)
brelse (SB_AP_BITMAP (s)[i].bh);
vfree (SB_AP_BITMAP (s));
brelse (SB_BUFFER_WITH_SB (s));
print_statistics (s);
if (s->u.reiserfs_sb.s_kmallocs != 0) {
reiserfs_warning ("vs-2004: reiserfs_put_super: allocated memory left %d\n",
s->u.reiserfs_sb.s_kmallocs);
}
if (s->u.reiserfs_sb.reserved_blocks != 0) {
reiserfs_warning ("green-2005: reiserfs_put_super: reserved blocks left %d\n",
s->u.reiserfs_sb.reserved_blocks);
}
reiserfs_proc_unregister( s, "journal" );
reiserfs_proc_unregister( s, "oidmap" );
reiserfs_proc_unregister( s, "on-disk-super" );
reiserfs_proc_unregister( s, "bitmap" );
reiserfs_proc_unregister( s, "per-level" );
reiserfs_proc_unregister( s, "super" );
reiserfs_proc_unregister( s, "version" );
reiserfs_proc_info_done( s );
return;
}
int reiserfs_create (struct inode * dir, struct dentry *dentry, int mode)
{
int error;
struct inode * inode;
struct reiserfs_dir_entry de;
int windex ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 2 ;
struct reiserfs_transaction_handle th ;
int err;
if (!dir)
return -ENOENT;
inode = get_empty_inode() ;
if (!inode) {
return -ENOSPC ;
}
journal_begin(&th, dir->i_sb, jbegin_count) ;
th.t_caller = "create" ;
windex = push_journal_writer("reiserfs_create") ;
inode = reiserfs_new_inode (&th, dir, mode, 0, dentry, inode, &err);
if (!inode) {
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return err;
}
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
inode->i_op = &reiserfs_file_inode_operations;
inode->i_mode = mode;
error = reiserfs_add_entry (&th, dir, dentry->d_name.name, dentry->d_name.len, INODE_PKEY (inode), &de, 1);
if (error) {
inode->i_nlink--;
if_in_ram_update_sd (&th, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
iput (inode);
return error;
}
if_in_ram_update_sd (&th, dir);
d_instantiate(dentry, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return 0;
}
int reiserfs_acl_chmod(struct inode *inode)
{
struct posix_acl *acl, *clone;
int error;
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
if (get_inode_sd_version(inode) == STAT_DATA_V1 ||
!reiserfs_posixacl(inode->i_sb)) {
return 0;
}
reiserfs_write_unlock(inode->i_sb);
acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
reiserfs_write_lock(inode->i_sb);
if (!acl)
return 0;
if (IS_ERR(acl))
return PTR_ERR(acl);
clone = posix_acl_clone(acl, GFP_NOFS);
posix_acl_release(acl);
if (!clone)
return -ENOMEM;
error = posix_acl_chmod_masq(clone, inode->i_mode);
if (!error) {
struct reiserfs_transaction_handle th;
size_t size = reiserfs_xattr_nblocks(inode,
reiserfs_acl_size(clone->a_count));
int depth;
depth = reiserfs_write_lock_once(inode->i_sb);
error = journal_begin(&th, inode->i_sb, size * 2);
if (!error) {
int error2;
error = reiserfs_set_acl(&th, inode, ACL_TYPE_ACCESS,
clone);
error2 = journal_end(&th, inode->i_sb, size * 2);
if (error2)
error = error2;
}
reiserfs_write_unlock_once(inode->i_sb, depth);
}
posix_acl_release(clone);
return error;
}
static int
posix_acl_set(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags, int type)
{
struct inode *inode = dentry->d_inode;
struct posix_acl *acl;
int error, error2;
struct reiserfs_transaction_handle th;
size_t jcreate_blocks;
if (!reiserfs_posixacl(inode->i_sb))
return -EOPNOTSUPP;
if (!inode_owner_or_capable(inode))
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl)) {
return PTR_ERR(acl);
} else if (acl) {
error = posix_acl_valid(acl);
if (error)
goto release_and_out;
}
} else
acl = NULL;
/* Pessimism: We can't assume that anything from the xattr root up
* has been created. */
jcreate_blocks = reiserfs_xattr_jcreate_nblocks(inode) +
reiserfs_xattr_nblocks(inode, size) * 2;
reiserfs_write_lock(inode->i_sb);
error = journal_begin(&th, inode->i_sb, jcreate_blocks);
if (error == 0) {
error = reiserfs_set_acl(&th, inode, type, acl);
error2 = journal_end(&th, inode->i_sb, jcreate_blocks);
if (error2)
error = error2;
}
reiserfs_write_unlock(inode->i_sb);
release_and_out:
posix_acl_release(acl);
return error;
}
/* we don't mark inodes dirty, we just log them */
static void reiserfs_dirty_inode (struct inode * inode) {
struct reiserfs_transaction_handle th ;
if (inode->i_sb->s_flags & MS_RDONLY) {
reiserfs_warning("clm-6006: writing inode %lu on readonly FS\n",
inode->i_ino) ;
return ;
}
lock_kernel() ;
/* this is really only used for atime updates, so they don't have
** to be included in O_SYNC or fsync
*/
journal_begin(&th, inode->i_sb, 1) ;
reiserfs_update_sd (&th, inode);
journal_end(&th, inode->i_sb, 1) ;
unlock_kernel() ;
}
/*
** We pack the tails of files on file close, not at the time they are written.
** This implies an unnecessary copy of the tail and an unnecessary indirect item
** insertion/balancing, for files that are written in one write.
** It avoids unnecessary tail packings (balances) for files that are written in
** multiple writes and are small enough to have tails.
**
** file_release is called by the VFS layer when the file is closed. If
** this is the last open file descriptor, and the file
** small enough to have a tail, and the tail is currently in an
** unformatted node, the tail is converted back into a direct item.
**
** We use reiserfs_truncate_file to pack the tail, since it already has
** all the conditions coded.
*/
static int reiserfs_file_release (struct inode * inode, struct file * filp)
{
struct reiserfs_transaction_handle th ;
int windex ;
if (!S_ISREG (inode->i_mode))
BUG ();
/* fast out for when nothing needs to be done */
if ((atomic_read(&inode->i_count) > 1 ||
!(inode->u.reiserfs_i.i_flags & i_pack_on_close_mask) ||
!tail_has_to_be_packed(inode)) &&
inode->u.reiserfs_i.i_prealloc_count <= 0) {
return 0;
}
lock_kernel() ;
down (&inode->i_sem);
journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT * 3) ;
reiserfs_update_inode_transaction(inode) ;
#ifdef REISERFS_PREALLOCATE
reiserfs_discard_prealloc (&th, inode);
#endif
journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT * 3) ;
if (atomic_read(&inode->i_count) <= 1 &&
(inode->u.reiserfs_i.i_flags & i_pack_on_close_mask) &&
tail_has_to_be_packed (inode)) {
/* if regular file is released by last holder and it has been
appended (we append by unformatted node only) or its direct
item(s) had to be converted, then it may have to be
indirect2direct converted */
windex = push_journal_writer("file_release") ;
reiserfs_truncate_file(inode, 0) ;
pop_journal_writer(windex) ;
}
up (&inode->i_sem);
unlock_kernel() ;
return 0;
}
int
reiserfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
int error, error2;
struct reiserfs_transaction_handle th;
size_t jcreate_blocks;
int size = acl ? posix_acl_xattr_size(acl->a_count) : 0;
int update_mode = 0;
umode_t mode = inode->i_mode;
/*
* Pessimism: We can't assume that anything from the xattr root up
* has been created.
*/
jcreate_blocks = reiserfs_xattr_jcreate_nblocks(inode) +
reiserfs_xattr_nblocks(inode, size) * 2;
reiserfs_write_lock(inode->i_sb);
error = journal_begin(&th, inode->i_sb, jcreate_blocks);
reiserfs_write_unlock(inode->i_sb);
if (error == 0) {
if (type == ACL_TYPE_ACCESS && acl) {
error = posix_acl_update_mode(inode, &mode, &acl);
if (error)
goto unlock;
update_mode = 1;
}
error = __reiserfs_set_acl(&th, inode, type, acl);
if (!error && update_mode)
inode->i_mode = mode;
unlock:
reiserfs_write_lock(inode->i_sb);
error2 = journal_end(&th);
reiserfs_write_unlock(inode->i_sb);
if (error2)
error = error2;
}
return error;
}
static int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) {
struct inode *inode = dentry->d_inode ;
int error ;
if (attr->ia_valid & ATTR_SIZE) {
/* version 2 items will be caught by the s_maxbytes check
** done for us in vmtruncate
*/
if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5 &&
attr->ia_size > MAX_NON_LFS)
return -EFBIG ;
/* fill in hole pointers in the expanding truncate case. */
if (attr->ia_size > inode->i_size) {
error = generic_cont_expand(inode, attr->ia_size) ;
if (inode->u.reiserfs_i.i_prealloc_count > 0) {
struct reiserfs_transaction_handle th ;
/* we're changing at most 2 bitmaps, inode + super */
journal_begin(&th, inode->i_sb, 4) ;
reiserfs_discard_prealloc (&th, inode);
journal_end(&th, inode->i_sb, 4) ;
}
if (error)
return error ;
}
}
if ((((attr->ia_valid & ATTR_UID) && (attr->ia_uid & ~0xffff)) ||
((attr->ia_valid & ATTR_GID) && (attr->ia_gid & ~0xffff))) &&
(get_inode_sd_version (inode) == STAT_DATA_V1))
/* stat data of format v3.5 has 16 bit uid and gid */
return -EINVAL;
error = inode_change_ok(inode, attr) ;
if (!error)
inode_setattr(inode, attr) ;
return error ;
}
/* this opens transaction unlike add_save_link */
void remove_save_link (struct inode * inode, int truncate)
{
struct reiserfs_transaction_handle th;
struct key key;
/* we are going to do one balancing only */
journal_begin (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
/* setup key of "save" link */
key.k_dir_id = cpu_to_le32 (MAX_KEY_OBJECTID);
key.k_objectid = INODE_PKEY (inode)->k_objectid;
if (!truncate) {
/* unlink, rmdir, rename */
set_le_key_k_offset (KEY_FORMAT_3_5, &key,
1 + inode->i_sb->s_blocksize);
set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_DIRECT);
} else {
/* truncate */
set_le_key_k_offset (KEY_FORMAT_3_5, &key, 1);
set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
}
if( ( truncate &&
( inode -> u.reiserfs_i.i_flags & i_link_saved_truncate_mask ) ) ||
( !truncate &&
( inode -> u.reiserfs_i.i_flags & i_link_saved_unlink_mask ) ) )
reiserfs_delete_solid_item (&th, &key);
if (!truncate) {
reiserfs_release_objectid (&th, inode->i_ino);
inode -> u.reiserfs_i.i_flags &= ~i_link_saved_unlink_mask;
} else
inode -> u.reiserfs_i.i_flags &= ~i_link_saved_truncate_mask;
journal_end (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
}
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);
unlock_new_inode(inode);
d_instantiate(dentry, inode);
retval = journal_end(&th, dir->i_sb, jbegin_count);
out_failed:
reiserfs_write_unlock_once(dir->i_sb, lock_depth);
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;
}
unlock_new_inode(inode);
d_instantiate(dentry, inode);
retval = journal_end(&th, dir->i_sb, jbegin_count);
out_failed:
reiserfs_write_unlock(dir->i_sb);
return retval;
}
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);
unlock_new_inode(inode);
d_instantiate(dentry, inode);
retval = journal_end(&th, dir->i_sb, jbegin_count);
out_failed:
reiserfs_write_unlock(dir->i_sb);
return retval;
}
/*
* 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 <*****@*****.**> 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;
}
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;
}
unlock_new_inode(inode);
d_instantiate(dentry, inode);
retval = journal_end(&th, parent_dir->i_sb, jbegin_count);
out_failed:
reiserfs_write_unlock(parent_dir->i_sb);
return retval;
}
int reiserfs_symlink (struct inode * dir, struct dentry * dentry, const char * symname)
{
struct inode * inode;
struct path path_to_entry;
struct reiserfs_dir_entry de;
int error;
int windex ;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
int err;
init_path (&path_to_entry);
if (strlen (symname) + 1 + SD_SIZE > MAX_ITEM_LEN (dir->i_sb->s_blocksize)) {
return -ENAMETOOLONG;
}
inode = get_empty_inode() ;
if (!inode) {
return -ENOSPC ;
}
journal_begin(&th, dir->i_sb, jbegin_count) ;
windex = push_journal_writer("reiserfs_symlink") ;
inode = reiserfs_new_inode (&th, dir, S_IFLNK, symname, dentry, inode, &err);
if (inode == 0) {
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return err;
}
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
inode->i_op = &reiserfs_symlink_inode_operations;
inode->i_size = strlen (symname);
inode->i_mode = S_IFLNK | 0777;
if_in_ram_update_sd (&th, inode);
de.de_gen_number_bit_string = 0;
if (reiserfs_find_entry (dir, dentry->d_name.name, dentry->d_name.len, &path_to_entry, &de) == POSITION_FOUND) {
pathrelse (&path_to_entry);
inode->i_nlink--;
if_in_ram_update_sd (&th, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
iput (inode);
return -EEXIST;
}
pathrelse (&path_to_entry);
error = reiserfs_add_entry (&th, dir, dentry->d_name.name, dentry->d_name.len, INODE_PKEY (inode), &de, 1);
if (error) {
inode->i_nlink--;
if_in_ram_update_sd (&th, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
iput (inode);
return error;
}
if_in_ram_update_sd (&th, dir);
d_instantiate(dentry, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return 0;
}
int reiserfs_unlink (struct inode * dir, struct dentry *dentry)
{
int retval;
struct inode * inode;
struct reiserfs_dir_entry de;
struct path path;
int windex ;
int call_journal_end = 1 ;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
init_path (&path);
retval = -ENOENT;
journal_begin(&th, dir->i_sb, jbegin_count) ;
windex = push_journal_writer("reiserfs_unlink") ;
/* free preserve list if we should */
/* maybe_free_preserve_list (dir->i_sb);*/
de.de_gen_number_bit_string = 0;
if (reiserfs_find_entry (dir, dentry->d_name.name, dentry->d_name.len, &path, &de) == POSITION_NOT_FOUND) {
goto end_unlink;
}
inode = dentry->d_inode;
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
retval = -EPERM;
if (S_ISDIR (inode->i_mode)) {
goto end_unlink;
}
if ((dir->i_mode & S_ISVTX) && !fsuser() &&
current->fsuid != inode->i_uid &&
current->fsuid != dir->i_uid) {
goto end_unlink;
}
retval = -ENOENT;
if (comp_short_keys ((struct key *)&(de.de_dir_id), INODE_PKEY (inode))) {
goto end_unlink;
}
if (!inode->i_nlink) {
printk("reiserfs_unlink: deleting nonexistent file (%s:%lu), %d\n",
kdevname(inode->i_dev), inode->i_ino, inode->i_nlink);
inode->i_nlink = 1;
}
if (reiserfs_cut_from_item (&th, dir, dir->i_sb, &path, &(de.de_entry_num), &(de.de_entry_key), 0, NOTHING_SPECIAL) == 0) {
retval = -ENOENT;
goto end_unlink;
}
inode->i_nlink--;
inode->i_ctime = CURRENT_TIME;
if_in_ram_update_sd (&th, inode);
dir->i_size -= (de.de_entrylen + DEH_SIZE);
dir->i_ctime = dir->i_mtime = CURRENT_TIME;
if_in_ram_update_sd (&th, dir) ;
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
call_journal_end = 0 ;
d_delete(dentry);
retval = 0;
end_unlink:
pathrelse (&path);
pop_journal_writer(windex) ;
if (call_journal_end)
journal_end(&th, dir->i_sb, jbegin_count) ;
return retval;
}
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_for_each_xattr(struct inode *inode,
int (*action)(struct dentry *, void *),
void *data)
{
struct dentry *dir;
int i, err = 0;
loff_t pos = 0;
struct reiserfs_dentry_buf buf = {
.count = 0,
};
/* Skip out, an xattr has no xattrs associated with it */
if (IS_PRIVATE(inode) || get_inode_sd_version(inode) == STAT_DATA_V1)
return 0;
reiserfs_write_unlock(inode->i_sb);
dir = open_xa_dir(inode, XATTR_REPLACE);
if (IS_ERR(dir)) {
err = PTR_ERR(dir);
reiserfs_write_lock(inode->i_sb);
goto out;
} else if (!dir->d_inode) {
err = 0;
reiserfs_write_lock(inode->i_sb);
goto out_dir;
}
mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_XATTR);
reiserfs_write_lock(inode->i_sb);
buf.xadir = dir;
err = reiserfs_readdir_dentry(dir, &buf, fill_with_dentries, &pos);
while ((err == 0 || err == -ENOSPC) && buf.count) {
err = 0;
for (i = 0; i < buf.count && buf.dentries[i]; i++) {
int lerr = 0;
struct dentry *dentry = buf.dentries[i];
if (err == 0 && !S_ISDIR(dentry->d_inode->i_mode))
lerr = action(dentry, data);
dput(dentry);
buf.dentries[i] = NULL;
err = lerr ?: err;
}
buf.count = 0;
if (!err)
err = reiserfs_readdir_dentry(dir, &buf,
fill_with_dentries, &pos);
}
mutex_unlock(&dir->d_inode->i_mutex);
/* Clean up after a failed readdir */
cleanup_dentry_buf(&buf);
if (!err) {
/* We start a transaction here to avoid a ABBA situation
* between the xattr root's i_mutex and the journal lock.
* This doesn't incur much additional overhead since the
* new transaction will just nest inside the
* outer transaction. */
int blocks = JOURNAL_PER_BALANCE_CNT * 2 + 2 +
4 * REISERFS_QUOTA_TRANS_BLOCKS(inode->i_sb);
struct reiserfs_transaction_handle th;
err = journal_begin(&th, inode->i_sb, blocks);
if (!err) {
int jerror;
reiserfs_mutex_lock_nested_safe(
&dir->d_parent->d_inode->i_mutex,
I_MUTEX_XATTR, inode->i_sb);
err = action(dir, data);
jerror = journal_end(&th, inode->i_sb, blocks);
mutex_unlock(&dir->d_parent->d_inode->i_mutex);
err = jerror ?: err;
}
}