/*
* NAME: jfs_unlink(dip, dentry)
*
* FUNCTION: remove a link to object <vp> named by <name>
* from parent directory <dvp>
*
* PARAMETER: dip - inode of parent directory
* dentry - dentry of object to be removed
*
* RETURN: errors from subroutines
*
* note:
* temporary file: if one or more processes have the file open
* when the last link is removed, the link will be removed before
* unlink() returns, but the removal of the file contents will be
* postponed until all references to the files are closed.
*
* JFS does NOT support unlink() on directories.
*
*/
static int jfs_unlink(struct inode *dip, struct dentry *dentry)
{
int rc;
tid_t tid; /* transaction id */
struct inode *ip = dentry->d_inode;
ino_t ino;
struct component_name dname; /* object name */
struct inode *iplist[2];
struct tblock *tblk;
s64 new_size = 0;
int commit_flag;
jfs_info("jfs_unlink: dip:0x%p name:%s", dip, dentry->d_name.name);
/* Init inode for quota operations. */
dquot_initialize(dip);
dquot_initialize(ip);
if ((rc = get_UCSname(&dname, dentry)))
goto out;
IWRITE_LOCK(ip, RDWRLOCK_NORMAL);
tid = txBegin(dip->i_sb, 0);
mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT);
mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);
iplist[0] = dip;
iplist[1] = ip;
/*
* delete the entry of target file from parent directory
*/
ino = ip->i_ino;
if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
jfs_err("jfs_unlink: dtDelete returned %d", rc);
if (rc == -EIO)
txAbort(tid, 1); /* Marks FS Dirty */
txEnd(tid);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
mutex_unlock(&JFS_IP(dip)->commit_mutex);
IWRITE_UNLOCK(ip);
goto out1;
}
ASSERT(ip->i_nlink);
ip->i_ctime = dip->i_ctime = dip->i_mtime = CURRENT_TIME;
mark_inode_dirty(dip);
/* update target's inode */
inode_dec_link_count(ip);
/*
* commit zero link count object
*/
if (ip->i_nlink == 0) {
assert(!test_cflag(COMMIT_Nolink, ip));
/* free block resources */
if ((new_size = commitZeroLink(tid, ip)) < 0) {
txAbort(tid, 1); /* Marks FS Dirty */
txEnd(tid);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
mutex_unlock(&JFS_IP(dip)->commit_mutex);
IWRITE_UNLOCK(ip);
rc = new_size;
goto out1;
}
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_DELETE;
tblk->u.ip = ip;
}
/*
* Incomplete truncate of file data can
* result in timing problems unless we synchronously commit the
* transaction.
*/
if (new_size)
commit_flag = COMMIT_SYNC;
else
commit_flag = 0;
/*
* If xtTruncate was incomplete, commit synchronously to avoid
* timing complications
*/
rc = txCommit(tid, 2, &iplist[0], commit_flag);
txEnd(tid);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
mutex_unlock(&JFS_IP(dip)->commit_mutex);
while (new_size && (rc == 0)) {
tid = txBegin(dip->i_sb, 0);
mutex_lock(&JFS_IP(ip)->commit_mutex);
new_size = xtTruncate_pmap(tid, ip, new_size);
if (new_size < 0) {
txAbort(tid, 1); /* Marks FS Dirty */
rc = new_size;
} else
rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC);
txEnd(tid);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
}
if (ip->i_nlink == 0)
set_cflag(COMMIT_Nolink, ip);
IWRITE_UNLOCK(ip);
/*
* Truncating the directory index table is not guaranteed. It
* may need to be done iteratively
*/
if (test_cflag(COMMIT_Stale, dip)) {
if (dip->i_size > 1)
jfs_truncate_nolock(dip, 0);
clear_cflag(COMMIT_Stale, dip);
}
out1:
free_UCSname(&dname);
out:
jfs_info("jfs_unlink: rc:%d", rc);
return rc;
}
/*
* NAME: jfs_rename
*
* FUNCTION: rename a file or directory
*/
static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
struct btstack btstack;
ino_t ino;
struct component_name new_dname;
struct inode *new_ip;
struct component_name old_dname;
struct inode *old_ip;
int rc;
tid_t tid;
struct tlock *tlck;
struct dt_lock *dtlck;
struct lv *lv;
int ipcount;
struct inode *iplist[4];
struct tblock *tblk;
s64 new_size = 0;
int commit_flag;
jfs_info("jfs_rename: %s %s", old_dentry->d_name.name,
new_dentry->d_name.name);
dquot_initialize(old_dir);
dquot_initialize(new_dir);
old_ip = old_dentry->d_inode;
new_ip = new_dentry->d_inode;
if ((rc = get_UCSname(&old_dname, old_dentry)))
goto out1;
if ((rc = get_UCSname(&new_dname, new_dentry)))
goto out2;
/*
* Make sure source inode number is what we think it is
*/
rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP);
if (rc || (ino != old_ip->i_ino)) {
rc = -ENOENT;
goto out3;
}
/*
* Make sure dest inode number (if any) is what we think it is
*/
rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP);
if (!rc) {
if ((!new_ip) || (ino != new_ip->i_ino)) {
rc = -ESTALE;
goto out3;
}
} else if (rc != -ENOENT)
goto out3;
else if (new_ip) {
/* no entry exists, but one was expected */
rc = -ESTALE;
goto out3;
}
if (S_ISDIR(old_ip->i_mode)) {
if (new_ip) {
if (!dtEmpty(new_ip)) {
rc = -ENOTEMPTY;
goto out3;
}
} else if ((new_dir != old_dir) &&
(new_dir->i_nlink == JFS_LINK_MAX)) {
rc = -EMLINK;
goto out3;
}
} else if (new_ip) {
IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL);
/* Init inode for quota operations. */
dquot_initialize(new_ip);
}
/*
* The real work starts here
*/
tid = txBegin(new_dir->i_sb, 0);
/*
* How do we know the locking is safe from deadlocks?
* The vfs does the hard part for us. Any time we are taking nested
* commit_mutexes, the vfs already has i_mutex held on the parent.
* Here, the vfs has already taken i_mutex on both old_dir and new_dir.
*/
mutex_lock_nested(&JFS_IP(new_dir)->commit_mutex, COMMIT_MUTEX_PARENT);
mutex_lock_nested(&JFS_IP(old_ip)->commit_mutex, COMMIT_MUTEX_CHILD);
if (old_dir != new_dir)
mutex_lock_nested(&JFS_IP(old_dir)->commit_mutex,
COMMIT_MUTEX_SECOND_PARENT);
if (new_ip) {
mutex_lock_nested(&JFS_IP(new_ip)->commit_mutex,
COMMIT_MUTEX_VICTIM);
/*
* Change existing directory entry to new inode number
*/
ino = new_ip->i_ino;
rc = dtModify(tid, new_dir, &new_dname, &ino,
old_ip->i_ino, JFS_RENAME);
if (rc)
goto out4;
drop_nlink(new_ip);
if (S_ISDIR(new_ip->i_mode)) {
drop_nlink(new_ip);
if (new_ip->i_nlink) {
mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
if (old_dir != new_dir)
mutex_unlock(&JFS_IP(old_dir)->commit_mutex);
mutex_unlock(&JFS_IP(old_ip)->commit_mutex);
mutex_unlock(&JFS_IP(new_dir)->commit_mutex);
if (!S_ISDIR(old_ip->i_mode) && new_ip)
IWRITE_UNLOCK(new_ip);
jfs_error(new_ip->i_sb,
"jfs_rename: new_ip->i_nlink != 0");
return -EIO;
}
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_DELETE;
tblk->u.ip = new_ip;
} else if (new_ip->i_nlink == 0) {
assert(!test_cflag(COMMIT_Nolink, new_ip));
/* free block resources */
if ((new_size = commitZeroLink(tid, new_ip)) < 0) {
txAbort(tid, 1); /* Marks FS Dirty */
rc = new_size;
goto out4;
}
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_DELETE;
tblk->u.ip = new_ip;
} else {
new_ip->i_ctime = CURRENT_TIME;
mark_inode_dirty(new_ip);
}
} else {
/*
* Add new directory entry
*/
rc = dtSearch(new_dir, &new_dname, &ino, &btstack,
JFS_CREATE);
if (rc) {
jfs_err("jfs_rename didn't expect dtSearch to fail "
"w/rc = %d", rc);
goto out4;
}
ino = old_ip->i_ino;
rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack);
if (rc) {
if (rc == -EIO)
jfs_err("jfs_rename: dtInsert returned -EIO");
goto out4;
}
if (S_ISDIR(old_ip->i_mode))
inc_nlink(new_dir);
}
/*
* Remove old directory entry
*/
ino = old_ip->i_ino;
rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE);
if (rc) {
jfs_err("jfs_rename did not expect dtDelete to return rc = %d",
rc);
txAbort(tid, 1); /* Marks Filesystem dirty */
goto out4;
}
if (S_ISDIR(old_ip->i_mode)) {
drop_nlink(old_dir);
if (old_dir != new_dir) {
/*
* Change inode number of parent for moved directory
*/
JFS_IP(old_ip)->i_dtroot.header.idotdot =
cpu_to_le32(new_dir->i_ino);
/* Linelock header of dtree */
tlck = txLock(tid, old_ip,
(struct metapage *) &JFS_IP(old_ip)->bxflag,
tlckDTREE | tlckBTROOT | tlckRELINK);
dtlck = (struct dt_lock *) & tlck->lock;
ASSERT(dtlck->index == 0);
lv = & dtlck->lv[0];
lv->offset = 0;
lv->length = 1;
dtlck->index++;
}
}
/*
* Update ctime on changed/moved inodes & mark dirty
*/
old_ip->i_ctime = CURRENT_TIME;
mark_inode_dirty(old_ip);
new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb);
mark_inode_dirty(new_dir);
/* Build list of inodes modified by this transaction */
ipcount = 0;
iplist[ipcount++] = old_ip;
if (new_ip)
iplist[ipcount++] = new_ip;
iplist[ipcount++] = old_dir;
if (old_dir != new_dir) {
iplist[ipcount++] = new_dir;
old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
mark_inode_dirty(old_dir);
}
/*
* Incomplete truncate of file data can
* result in timing problems unless we synchronously commit the
* transaction.
*/
if (new_size)
commit_flag = COMMIT_SYNC;
else
commit_flag = 0;
rc = txCommit(tid, ipcount, iplist, commit_flag);
out4:
txEnd(tid);
if (new_ip)
mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
if (old_dir != new_dir)
mutex_unlock(&JFS_IP(old_dir)->commit_mutex);
mutex_unlock(&JFS_IP(old_ip)->commit_mutex);
mutex_unlock(&JFS_IP(new_dir)->commit_mutex);
while (new_size && (rc == 0)) {
tid = txBegin(new_ip->i_sb, 0);
mutex_lock(&JFS_IP(new_ip)->commit_mutex);
new_size = xtTruncate_pmap(tid, new_ip, new_size);
if (new_size < 0) {
txAbort(tid, 1);
rc = new_size;
} else
rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC);
txEnd(tid);
mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
}
if (new_ip && (new_ip->i_nlink == 0))
set_cflag(COMMIT_Nolink, new_ip);
out3:
free_UCSname(&new_dname);
out2:
free_UCSname(&old_dname);
out1:
if (new_ip && !S_ISDIR(new_ip->i_mode))
IWRITE_UNLOCK(new_ip);
/*
* Truncating the directory index table is not guaranteed. It
* may need to be done iteratively
*/
if (test_cflag(COMMIT_Stale, old_dir)) {
if (old_dir->i_size > 1)
jfs_truncate_nolock(old_dir, 0);
clear_cflag(COMMIT_Stale, old_dir);
}
jfs_info("jfs_rename: returning %d", rc);
return rc;
}
/*
* NAME: jfs_rmdir(dip, dentry)
*
* FUNCTION: remove a link to child directory
*
* PARAMETER: dip - parent inode
* dentry - child directory dentry
*
* RETURN: -EINVAL - if name is . or ..
* -EINVAL - if . or .. exist but are invalid.
* errors from subroutines
*
* note:
* if other threads have the directory open when the last link
* is removed, the "." and ".." entries, if present, are removed before
* rmdir() returns and no new entries may be created in the directory,
* but the directory is not removed until the last reference to
* the directory is released (cf.unlink() of regular file).
*/
static int jfs_rmdir(struct inode *dip, struct dentry *dentry)
{
int rc;
tid_t tid; /* transaction id */
struct inode *ip = dentry->d_inode;
ino_t ino;
struct component_name dname;
struct inode *iplist[2];
struct tblock *tblk;
jfs_info("jfs_rmdir: dip:0x%p name:%s", dip, dentry->d_name.name);
/* Init inode for quota operations. */
dquot_initialize(dip);
dquot_initialize(ip);
/* directory must be empty to be removed */
if (!dtEmpty(ip)) {
rc = -ENOTEMPTY;
goto out;
}
if ((rc = get_UCSname(&dname, dentry))) {
goto out;
}
tid = txBegin(dip->i_sb, 0);
mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT);
mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);
iplist[0] = dip;
iplist[1] = ip;
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_DELETE;
tblk->u.ip = ip;
/*
* delete the entry of target directory from parent directory
*/
ino = ip->i_ino;
if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
jfs_err("jfs_rmdir: dtDelete returned %d", rc);
if (rc == -EIO)
txAbort(tid, 1);
txEnd(tid);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
mutex_unlock(&JFS_IP(dip)->commit_mutex);
goto out2;
}
/* update parent directory's link count corresponding
* to ".." entry of the target directory deleted
*/
dip->i_ctime = dip->i_mtime = CURRENT_TIME;
inode_dec_link_count(dip);
/*
* OS/2 could have created EA and/or ACL
*/
/* free EA from both persistent and working map */
if (JFS_IP(ip)->ea.flag & DXD_EXTENT) {
/* free EA pages */
txEA(tid, ip, &JFS_IP(ip)->ea, NULL);
}
JFS_IP(ip)->ea.flag = 0;
/* free ACL from both persistent and working map */
if (JFS_IP(ip)->acl.flag & DXD_EXTENT) {
/* free ACL pages */
txEA(tid, ip, &JFS_IP(ip)->acl, NULL);
}
JFS_IP(ip)->acl.flag = 0;
/* mark the target directory as deleted */
clear_nlink(ip);
mark_inode_dirty(ip);
rc = txCommit(tid, 2, &iplist[0], 0);
txEnd(tid);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
mutex_unlock(&JFS_IP(dip)->commit_mutex);
/*
* Truncating the directory index table is not guaranteed. It
* may need to be done iteratively
*/
if (test_cflag(COMMIT_Stale, dip)) {
if (dip->i_size > 1)
jfs_truncate_nolock(dip, 0);
clear_cflag(COMMIT_Stale, dip);
}
out2:
free_UCSname(&dname);
out:
jfs_info("jfs_rmdir: rc:%d", rc);
return rc;
}
/*
* NAME: jfs_rename
*
* FUNCTION: rename a file or directory
*
* PARAMETER: from_vp - pointer to source vnode
* frompar_vp - pointer to source parent vnode
* from_name - original name
* to_vp - pointer to target vnode (if it exists)
* topar_vp - pointer to target parent vnode
* to_name - new name
* crp - pointer to caller's credentials
*
* RETURN: errors from subroutines
*
* JFS supports sticky bit permission.
*
* normally, to rename an object, user needs execute and write
* permission of the directory containing the object as well as
* on the target directory.
* EACCESS: if S_ISVTX (aka sticky) bit is set for a directory,
* a file in the directory can be renamed only if
* the user has write permission for the directory, and
* either owns the file, owns the directory, or
* is the superuser (or have appropriate privileges).
* (e.g., /tmp in which any user can create a file but
* should not be able to delete or rename files owned
* by others) [XPG4.2]
*
* Basic algorithm is:
*
* 1) Check validity of parameters and then obtain locks on the source parent
* directory, destination parent directory, source, and the destination
* inode. This ensures neither the source or destination will be deleted out
* from underneath us. It also ensures the source or destination won't be
* modified before we finish.
* 2) Link source to destination. If destination already exists,
* delete it first.
* 3) Unlink source reference to inode if still around. If a
* directory was moved and the parent of the destination
* is different from the source, patch the ".." entry in the
* directory.
*
* The transaction log needs to have the changes journalled in such a
* way that a crash meets the requirement that the destination always
* exists (if it existed before). For directory objects it is critical
* that the changes in i-numbers occur in such a way that loops and
* orphans aren't created by a crash.
*/
int32
jfs_rename(
struct vnode *from_vp, /* source vnode */
struct vnode *frompar_vp, /* source parent vnode */
UniChar *from_name, /* source name */
struct vnode *to_vp, /* destination vnode */
struct vnode *topar_vp, /* destination parent vnode */
UniChar *to_name, /* destination name */
struct dasd_usage *from_dlim, /* dasd usage structure for source F226941 */
struct dasd_usage *to_dlim, /* dasd usage structure for dest F226941 */
uint32 flags) /* INEWNAME if new pathname not 8.3 */
{
inode_t *ipmnt;
int32 tid = -1; /* Transaction ID */
int32 txCount = 0; /* Count of inodes in txList */
inode_t *txList[4]; /* List of modified inodes */
inode_t *from_ip = VP2IP (from_vp); /* Source inode */
inode_t *frompar_ip = VP2IP (frompar_vp); /* Source parent inode */
inode_t *to_ip = to_vp ? VP2IP (to_vp) : 0;
/* Target inode (if it exists) */
inode_t *topar_ip = VP2IP (topar_vp); /* Target parent inode */
struct vfs *vfsf = frompar_vp->v_vfsp;
struct vfs *vfst = topar_vp->v_vfsp;
int32 doingdirectory = 0, /* Source inode is a directory */
newparent = 0; /* New i-number of parent */
int32 got_from = 0, got_to = 0;
btstack_t btstack; /* Temporary stack for B-tree struct */
component_t dname; /* Directory name structure */
ino_t ino; /* I-number for directory searches */
int32 error = 0, rc;
tlock_t *tlck; /* Transaction lock */
dtlock_t *dtlck; /* dtree line lock */
lv_t *lv; /* line lock vector */
// BEGIN F226941
#ifdef _JFS_OS2
int64 blocks_moving; /* Number of blocks being moved */
int64 orig_fromblocks; /* original dasd usage of from dir */
int64 orig_toblocks; /* original dasd usage of to dir */
uint32 start_here; /* index in limits array */
int32 i;
inode_t *lock_arr[64]; /* Array of inodes to lock */
inode_t **lock_list; /* List of inodes to lock */
int32 num_locks; /* Number of inodes to lock */
int32 upper_limit; /* Upper limit to number of inodes
* we need to lock */
#ifdef _JFS_FASTDASD
int32 first_locked; /* index in lock_list array of first
* inode still locked. D233382
*/
#endif /* _JFS_FASTDASD */
#endif /* _JFS_OS2 */
// BEGIN F226941
assert( to_name != NULL && from_name != NULL);
ipmnt = frompar_ip->i_ipmnt;
RENAME_LOCK(ipmnt);
/*
* Make sure that we are not renaming the "." or ".." entries in
* a directory.
*/
if (from_name[0] == '.' &&
(!from_name[1] || (from_name[1] == '.' && !from_name[2])))
{
error = EINVAL;
goto abortit;
}
/*
* Now we want to verify the proper realationship between the inodes.
* If everything checks out we need to obtain locks on the source parent
* directory, destination parent directory, source, and destination
* inodes. This allows us to proceed knowing that noone can delete
* either the source or destination from underneath us. It also allows
* us to know noone will be modifying the destination so we can delete
* it safely. We need the lock on the source since we might need to
* modify its .. entry.
*/
/*
* In OS/2, the destination cannot exist unless it is the same as
* the source. This is to allow DosMove to change the case of a
* filename.
*/
if (to_ip && (from_ip != to_ip))
{
error = EINVAL;
goto abortit;
}
/*
* Check for cross-device rename.
*/
if (frompar_ip->i_dev != topar_ip->i_dev)
{
error = EXDEV;
goto abortit;
}
/*
* Check if source is the destination parent. Can't do this
* since this would orphan everything under the source.
*/
if (from_ip == topar_ip)
{
error = EINVAL;
goto abortit;
}
/*
* Now we know both the parents are okay. We will lock both the
* parent inodes so we can guarantee the children will not be
* deleted underneath us. We will also lock the source.
* When locking the inodes we will use the protocol of locking
* regular files first, then directories. When locking more than
* one of each type, we do it in descending inode order. We also need
* to make sure we don't attempt to lock one inode twice if the
* two parents are the same.
*/
if ((from_ip->i_mode & IFMT) == IFDIR)
doingdirectory = 1;
// BEGIN F226941
if (from_dlim->num_limits)
{
/* We need to lock all directories from the root to each of
* the from and to parent directories. The DASD usage lists
* will contain at least one common entry (the root). We need
* to compile a list of all unique inodes to lock. The upper
* limit will be the sum of both num_limits fields.
*/
if (frompar_ip == topar_ip)
upper_limit = from_dlim->num_limits + 1;
else
upper_limit = from_dlim->num_limits +
to_dlim->num_limits;
if (upper_limit > 64)
lock_list = (inode_t **)
xmalloc(upper_limit* sizeof(inode_t *),
0, kernel_heap);
else
lock_list = lock_arr;
/* Put from parents dasd usage list into lock_list */
for (num_locks = 0; num_locks < from_dlim->num_limits;
num_locks++)
lock_list[num_locks] = from_dlim->pLimits[num_locks];
/*
* We need to lock regular files before directories. If
* we are moving a regular file, lock it now, otherwise add
* it to the lock list.
*/
if (doingdirectory)
lock_list[num_locks++] = from_ip;
else
IWRITE_LOCK(from_ip);
if (frompar_ip != topar_ip)
{
/* Add unique members of to parent's dasd usage list */
for (i = 0; i < to_dlim->num_limits; i++)
if (to_dlim->pLimits[i] != lock_list[i])
break;
start_here = i; /* Needed by over_limit() */
while (i < to_dlim->num_limits)
lock_list[num_locks++] = to_dlim->pLimits[i++];
}
/* Lock them! */
sort_and_lock(0, num_locks, lock_list);
/*
* If this was a regular file, add the inode to the lock list
* now, so we include it in the txCommit, and unlock it
*/
if (!doingdirectory)
lock_list[num_locks++] = from_ip;
from_dlim->flag |= DLIM_DIRS_LOCKED;
frompar_ip->i_dasdlim = from_dlim;
if (frompar_ip != topar_ip) // D230860
{
to_dlim->flag |= DLIM_DIRS_LOCKED;
topar_ip->i_dasdlim = to_dlim;
}
}
else
// END F226941
{
if (doingdirectory)
{
if (frompar_ip == topar_ip)
iwritelocklist(2, frompar_ip, from_ip);
else
iwritelocklist(3, frompar_ip, topar_ip,
from_ip);
}
else
{
if (frompar_ip == topar_ip)
{
IWRITE_LOCK(from_ip);
IWRITE_LOCK(frompar_ip);
}
else
{
IWRITE_LOCK(from_ip);
iwritelocklist(2, frompar_ip, topar_ip);
}
}
}
/*
* Now that we have the source parent locked we can lookup the
* source inode to make sure it hasn't changed since we did our
* initial verification. If it has we will need to release our
* locks and repeat our verification with the new version.
* Otherwise we know the source is valid and we can continue.
*/
dname.name = from_name;
dname.namlen = UniStrlen (from_name);
rc = dtSearch(frompar_ip, &dname, &ino, &btstack, JFS_LOOKUP);
switch (rc)
{
case 0:
/*
* An entry was found, need to see if it is the
* same inode as we had before.
*/
if (ino != from_ip->i_number)
{
rc = ENOENT;
goto cleanup;
}
break;
default:
/*
* Either the source cannot be found or
* something went wrong in the search
*/
error = rc;
goto cleanup;
}
/*
* If changing case, no need to search for destination inode
*/
if (!to_ip)
{
/*
* Now we can lookup the destination inode to make sure it
* hasn't been created since we did our verifications. If it
* has we abort.
*/
dname.name = to_name;
dname.namlen = UniStrlen (to_name);
if (dname.namlen > JFS_NAME_MAX-1)
{
error = ERROR_FILENAME_EXCED_RANGE;
goto cleanup;
}
rc = dtSearch(topar_ip, &dname, &ino, &btstack, JFS_LOOKUP);
switch (rc)
{
case 0:
/*
* We found an entry; fail with EEXIST
*/
rc = EEXIST;
goto cleanup;
case ENOENT:
break;
default:
/*
* Some error from dtSearch(). cleanup and
* return
*/
error = rc;
goto cleanup;
}
}
/*
* Now we need to validate parameters and check for proper inodes
*/
/*
* Make sure the source inode has a positive link count
*/
if (from_ip->i_nlink <= 0)
{
error = EINVAL;
goto cleanup;
}
if ((topar_ip->i_mode & IFMT) != IFDIR)
{
error = EINVAL;
goto cleanup;
}
/* Check for the appropriate permissions on the source */
if (doingdirectory && (frompar_ip->i_number != topar_ip->i_number))
{
/*
* Account for ".." in new directory. When source and
* destination have the same parent we don't fool with the link
* count.
*/
if ((nlink_t)topar_ip->i_nlink >= LINK_MAX)
{
error = EMLINK;
goto cleanup;
}
/*
* If ".." must be changed (i.e. the directory gets a new
* parent) then the source directory must not be in the
* directory hierarchy above the target, as this would orphan
* everything below the source directory.
*/
newparent = topar_ip->i_number;
/* RENAME_LOCK(topar_ip->i_ipmnt); */
if (error = jfs_checkpath(from_ip, frompar_ip, topar_ip, vfst))
goto cleanup;
}
/*
* Check for write-protected media
*/
if (isReadOnly(topar_ip))
{
error = EROFS;
goto cleanup;
}
// BEGIN F226941
/*
* Check to see if there is room in the destination directory
*/
blocks_moving = doingdirectory ? DASDUSED(&from_ip->i_DASD) :
from_ip->i_nblocks;
if ((topar_ip != frompar_ip) && (topar_ip->i_dasdlim) &&
over_limit(topar_ip->i_dasdlim, blocks_moving, start_here))
{
error = ERROR_DISK_FULL;
goto cleanup;
}
orig_fromblocks = frompar_ip->i_nblocks;
if (topar_ip != frompar_ip)
orig_toblocks = topar_ip->i_nblocks;
// END F226941
/*
* Perform rename
*/
txBegin(topar_ip->i_ipmnt, &tid, 0);
dname.name = to_name;
dname.namlen = UniStrlen (to_name);
if (to_ip != NULL)
{
/*
* We change the case of the name in place.
*/
ino = to_ip->i_number;
if (error = dtChangeCase(tid, frompar_ip, &dname, &ino,
JFS_RENAME))
goto cleanup;
imark(topar_ip, ICHG|IUPD|IFSYNC);
}
else
{
/*
* We already know the destination does not exist, so link
* source inode as destination.
*/
if (error = dtSearch(topar_ip, &dname, &ino, &btstack,
JFS_CREATE))
{
/*
* Problem, can't find where to put this guy, or it
* already exists!!
*/
goto cleanup;
}
ino = from_ip->i_number;
if (error = dtInsert(tid, topar_ip, &dname, &ino, &btstack))
{
/*
* Failed adding source to destination parent
*/
goto cleanup;
}
imark(topar_ip, ICHG|IUPD|IFSYNC);
/* Insert entry for the new file to name cache */
ncEnter(topar_ip->i_ipimap, topar_ip->i_number, &dname,
from_ip->i_number, NULL);
/* Remove source name from source parent and name cache */
dname.name = from_name;
dname.namlen = UniStrlen (from_name);
ino = from_ip->i_number;
ncDelete(frompar_ip->i_ipimap, frompar_ip->i_number, &dname);
if (error = dtDelete(tid, frompar_ip, &dname, &ino, JFS_REMOVE))
{
/*
* Another unexpected error -- the original file does not
* appear to exist ...
*/
assert(0);
}
imark(frompar_ip, ICHG|IUPD|IFSYNC);
/*
* If this is a directory we need to update the ".." i-number
* in the inode. Also, there is now one fewer ".." referencing
* the source parent directory. Decrement the link count to
* the source parent directory for this.
*/
if (doingdirectory && newparent)
{
/* linelock header of dtree root (containing idotdot)
*/
tlck = txLock(tid, from_ip,
(jbuf_t *)&from_ip->i_bxflag,
tlckDTREE|tlckBTROOT);
dtlck = (dtlock_t *)&tlck->lock;
ASSERT(dtlck->index == 0);
lv = (lv_t *)&dtlck->lv[0];
lv->offset = 0;
lv->length = 1;
dtlck->index++;
((dtroot_t *) &from_ip->i_btroot)->header.idotdot =
newparent;
frompar_ip->i_nlink--;
topar_ip->i_nlink++;
/* RENAME_UNLOCK(topar_ip->i_ipmnt); */
}
/* Set or reset INEWNAME flag as appropriate */
from_ip->i_mode = (from_ip->i_mode & ~INEWNAME) |
(flags & INEWNAME);
imark(from_ip, ICHG|IFSYNC); // D231252
txList[txCount++] = from_ip; // D231252
}
// BEGIN F226941
/*
* Modify dasd usage for source and destination directories.
* Number of blocks for object being moved didn't change.
*/
if (frompar_ip == topar_ip)
{
DLIM_UPDATE(tid, frompar_ip, frompar_ip->i_nblocks
- orig_fromblocks);
}
else
{
DLIM_UPDATE(tid, topar_ip, topar_ip->i_nblocks +
blocks_moving - orig_toblocks);
DLIM_UPDATE(tid, frompar_ip, frompar_ip->i_nblocks -
(orig_fromblocks + blocks_moving));
}
// BEGIN D233382
#ifdef _JFS_FASTDASD
if (from_dlim->num_limits)
{
/*
* Let's remove any ancestor directories at the beginning of
* the lock list that aren't directly involved in the rename.
* i_dasdlim will be non-zero for frompar_ip & topar_ip
*/
for(i = 0; i < num_locks; i++)
{
if (lock_list[i]->i_dasdlim)
{
first_locked = i;
break;
}
IWRITE_UNLOCK(lock_list[i]);
}
ASSERT(i < num_locks); // We shouldn't have unlocked them all.
}
#endif /* _JFS_FASTDASD */
// END D233382
#ifndef _JFS_FASTDASD // D233382
if ((from_dlim->flag & DLIM_LOGGED) || (to_dlim->flag & DLIM_LOGGED))
{
error = txCommit(tid, num_locks, lock_list, 0);
from_dlim->flag &= ~DLIM_LOGGED;
to_dlim->flag &= ~DLIM_LOGGED;
}
else
#endif /* _JFS_FASTDASD */ // D233382
// END F226941
{
if (frompar_ip != topar_ip)
{
/*
* Different parent, so we need to add the other parent
* to our transaction list
*/
txList[txCount++] = topar_ip;
}
/* Add source parent directory to transaction list */
txList[txCount++] = frompar_ip;
assert(txCount <= 4);
error = txCommit(tid, txCount, txList, 0);
}
cleanup:
/*
* Come to this label when all locks have been taken and ready to leave.
* error should be set to return value.
*/
if (tid != -1) txEnd(tid);
// BEGIN F226941
if (from_dlim->num_limits)
{
frompar_ip->i_dasdlim->flag &= ~DLIM_DIRS_LOCKED;
frompar_ip->i_dasdlim = 0;
if (frompar_ip != topar_ip)
{
topar_ip->i_dasdlim->flag &= ~DLIM_DIRS_LOCKED;
topar_ip->i_dasdlim = 0;
}
#ifdef _JFS_FASTDASD
for(i = first_locked; i < num_locks; i++) // D233382
#else
for(i = 0; i < num_locks; i++)
#endif
IWRITE_UNLOCK(lock_list[i]);
if (lock_list != lock_arr)
xmfree((void *)lock_list, kernel_heap);
}
else
// END F226941
{
IWRITE_UNLOCK(from_ip);
IWRITE_UNLOCK(frompar_ip);
if (frompar_ip != topar_ip)
{
IWRITE_UNLOCK(topar_ip);
}
}
abortit:
/*
* Come to this label when none of the locks have been taken and ready
* to leave. error should be set to return value.
*/
if (to_ip && got_to)
{
ICACHE_LOCK();
iput(to_ip, vfst);
ICACHE_UNLOCK();
}
if (got_from)
{
ICACHE_LOCK();
iput(from_ip, vfsf);
ICACHE_UNLOCK();
}
RENAME_UNLOCK(ipmnt);
return error;
}
int jfs_symlink(struct inode *dip, struct dentry *dentry, const char *name)
{
int rc;
tid_t tid;
ino_t ino = 0;
struct component_name dname;
int ssize; /* source pathname size */
struct btstack btstack;
struct inode *ip = dentry->d_inode;
unchar *i_fastsymlink;
s64 xlen = 0;
int bmask = 0, xsize;
s64 xaddr;
struct metapage *mp;
struct super_block *sb;
struct tblock *tblk;
struct inode *iplist[2];
jFYI(1, ("jfs_symlink: dip:0x%p name:%s\n", dip, name));
ssize = strlen(name) + 1;
/*
* search parent directory for entry/freespace
* (dtSearch() returns parent directory page pinned)
*/
if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dip->i_sb)->nls_tab)))
goto out1;
/*
* allocate on-disk/in-memory inode for symbolic link:
* (iAlloc() returns new, locked inode)
*/
ip = ialloc(dip, S_IFLNK | 0777);
if (ip == NULL) {
rc = ENOSPC;
goto out2;
}
tid = txBegin(dip->i_sb, 0);
down(&JFS_IP(dip)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE)))
goto out3;
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_CREATE;
tblk->ip = ip;
/*
* create entry for symbolic link in parent directory
*/
ino = ip->i_ino;
if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
jERROR(1, ("jfs_symlink: dtInsert returned %d\n", rc));
/* discard ne inode */
goto out3;
}
/* fix symlink access permission
* (dir_create() ANDs in the u.u_cmask,
* but symlinks really need to be 777 access)
*/
ip->i_mode |= 0777;
/*
* write symbolic link target path name
*/
xtInitRoot(tid, ip);
/*
* write source path name inline in on-disk inode (fast symbolic link)
*/
if (ssize <= IDATASIZE) {
ip->i_op = &jfs_symlink_inode_operations;
i_fastsymlink = JFS_IP(ip)->i_inline;
memcpy(i_fastsymlink, name, ssize);
ip->i_size = ssize - 1;
/*
* if symlink is > 128 bytes, we don't have the space to
* store inline extended attributes
*/
if (ssize > sizeof (JFS_IP(ip)->i_inline))
JFS_IP(ip)->mode2 &= ~INLINEEA;
jFYI(1,
("jfs_symlink: fast symlink added ssize:%d name:%s \n",
ssize, name));
}
/*
* write source path name in a single extent
*/
else {
jFYI(1, ("jfs_symlink: allocate extent ip:0x%p\n", ip));
ip->i_op = &page_symlink_inode_operations;
ip->i_mapping->a_ops = &jfs_aops;
/*
* even though the data of symlink object (source
* path name) is treated as non-journaled user data,
* it is read/written thru buffer cache for performance.
*/
sb = ip->i_sb;
bmask = JFS_SBI(sb)->bsize - 1;
xsize = (ssize + bmask) & ~bmask;
xaddr = 0;
xlen = xsize >> JFS_SBI(sb)->l2bsize;
if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0)) == 0) {
ip->i_size = ssize - 1;
while (ssize) {
int copy_size = min(ssize, PSIZE);
mp = get_metapage(ip, xaddr, PSIZE, 1);
if (mp == NULL) {
dtDelete(tid, dip, &dname, &ino,
JFS_REMOVE);
rc = EIO;
goto out3;
}
memcpy(mp->data, name, copy_size);
flush_metapage(mp);
#if 0
mark_buffer_uptodate(bp, 1);
mark_buffer_dirty(bp, 1);
if (IS_SYNC(dip)) {
ll_rw_block(WRITE, 1, &bp);
wait_on_buffer(bp);
}
brelse(bp);
#endif /* 0 */
ssize -= copy_size;
xaddr += JFS_SBI(sb)->nbperpage;
}
ip->i_blocks = LBLK2PBLK(sb, xlen);
} else {
dtDelete(tid, dip, &dname, &ino, JFS_REMOVE);
rc = ENOSPC;
goto out3;
}
}
insert_inode_hash(ip);
mark_inode_dirty(ip);
d_instantiate(dentry, ip);
/*
* commit update of parent directory and link object
*
* if extent allocation failed (ENOSPC),
* the parent inode is committed regardless to avoid
* backing out parent directory update (by dtInsert())
* and subsequent dtDelete() which is harmless wrt
* integrity concern.
* the symlink inode will be freed by iput() at exit
* as it has a zero link count (by dtDelete()) and
* no permanant resources.
*/
iplist[0] = dip;
if (rc == 0) {
iplist[1] = ip;
rc = txCommit(tid, 2, &iplist[0], 0);
} else
rc = txCommit(tid, 1, &iplist[0], 0);
out3:
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
if (rc) {
ip->i_nlink = 0;
iput(ip);
}
out2:
free_UCSname(&dname);
out1:
jFYI(1, ("jfs_symlink: rc:%d\n", -rc));
return -rc;
}
/*
* NAME: jfs_unlink(dip, dentry)
*
* FUNCTION: remove a link to object <vp> named by <name>
* from parent directory <dvp>
*
* PARAMETER: dip - inode of parent directory
* dentry - dentry of object to be removed
*
* RETURN: errors from subroutines
*
* note:
* temporary file: if one or more processes have the file open
* when the last link is removed, the link will be removed before
* unlink() returns, but the removal of the file contents will be
* postponed until all references to the files are closed.
*
* JFS does NOT support unlink() on directories.
*
*/
int jfs_unlink(struct inode *dip, struct dentry *dentry)
{
int rc;
tid_t tid; /* transaction id */
struct inode *ip = dentry->d_inode;
ino_t ino;
struct component_name dname; /* object name */
struct inode *iplist[2];
struct tblock *tblk;
s64 new_size = 0;
int commit_flag;
jFYI(1, ("jfs_unlink: dip:0x%p name:%s\n", dip, dentry->d_name.name));
if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dip->i_sb)->nls_tab)))
goto out;
IWRITE_LOCK(ip);
tid = txBegin(dip->i_sb, 0);
down(&JFS_IP(dip)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
iplist[0] = dip;
iplist[1] = ip;
/*
* delete the entry of target file from parent directory
*/
ino = ip->i_ino;
if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
jERROR(1, ("jfs_unlink: dtDelete returned %d\n", rc));
if (rc == EIO)
txAbort(tid, 1); /* Marks FS Dirty */
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
IWRITE_UNLOCK(ip);
goto out1;
}
ASSERT(ip->i_nlink);
ip->i_ctime = dip->i_ctime = dip->i_mtime = CURRENT_TIME;
mark_inode_dirty(dip);
/* update target's inode */
ip->i_nlink--;
mark_inode_dirty(ip);
/*
* commit zero link count object
*/
if (ip->i_nlink == 0) {
assert(!test_cflag(COMMIT_Nolink, ip));
/* free block resources */
if ((new_size = commitZeroLink(tid, ip)) < 0) {
txAbort(tid, 1); /* Marks FS Dirty */
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
IWRITE_UNLOCK(ip);
rc = -new_size; /* We return -rc */
goto out1;
}
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_DELETE;
tblk->ip = ip;
}
/*
* Incomplete truncate of file data can
* result in timing problems unless we synchronously commit the
* transaction.
*/
if (new_size)
commit_flag = COMMIT_SYNC;
else
commit_flag = 0;
/*
* If xtTruncate was incomplete, commit synchronously to avoid
* timing complications
*/
rc = txCommit(tid, 2, &iplist[0], commit_flag);
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
while (new_size && (rc == 0)) {
tid = txBegin(dip->i_sb, 0);
down(&JFS_IP(ip)->commit_sem);
new_size = xtTruncate_pmap(tid, ip, new_size);
if (new_size < 0) {
txAbort(tid, 1); /* Marks FS Dirty */
rc = -new_size; /* We return -rc */
} else
rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC);
txEnd(tid);
up(&JFS_IP(ip)->commit_sem);
}
if (ip->i_nlink == 0)
set_cflag(COMMIT_Nolink, ip);
if (!test_cflag(COMMIT_Holdlock, ip))
IWRITE_UNLOCK(ip);
/*
* Truncating the directory index table is not guaranteed. It
* may need to be done iteratively
*/
if (test_cflag(COMMIT_Stale, dip)) {
if (dip->i_size > 1)
jfs_truncate_nolock(dip, 0);
clear_cflag(COMMIT_Stale, dip);
}
out1:
free_UCSname(&dname);
out:
jFYI(1, ("jfs_unlink: rc:%d\n", -rc));
return -rc;
}
/*
* NAME: jfs_rmdir(dip, dentry)
*
* FUNCTION: remove a link to child directory
*
* PARAMETER: dip - parent inode
* dentry - child directory dentry
*
* RETURN: EINVAL - if name is . or ..
* EINVAL - if . or .. exist but are invalid.
* errors from subroutines
*
* note:
* if other threads have the directory open when the last link
* is removed, the "." and ".." entries, if present, are removed before
* rmdir() returns and no new entries may be created in the directory,
* but the directory is not removed until the last reference to
* the directory is released (cf.unlink() of regular file).
*/
int jfs_rmdir(struct inode *dip, struct dentry *dentry)
{
int rc;
tid_t tid; /* transaction id */
struct inode *ip = dentry->d_inode;
ino_t ino;
struct component_name dname;
struct inode *iplist[2];
struct tblock *tblk;
jFYI(1, ("jfs_rmdir: dip:0x%p name:%s\n", dip, dentry->d_name.name));
/* directory must be empty to be removed */
if (!dtEmpty(ip)) {
rc = ENOTEMPTY;
goto out;
}
if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dip->i_sb)->nls_tab))) {
goto out;
}
tid = txBegin(dip->i_sb, 0);
down(&JFS_IP(dip)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
iplist[0] = dip;
iplist[1] = ip;
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_DELETE;
tblk->ip = ip;
/*
* delete the entry of target directory from parent directory
*/
ino = ip->i_ino;
if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
jERROR(1, ("jfs_rmdir: dtDelete returned %d\n", rc));
if (rc == EIO)
txAbort(tid, 1);
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
goto out2;
}
/* update parent directory's link count corresponding
* to ".." entry of the target directory deleted
*/
dip->i_nlink--;
dip->i_ctime = dip->i_mtime = CURRENT_TIME;
mark_inode_dirty(dip);
/*
* OS/2 could have created EA and/or ACL
*/
/* free EA from both persistent and working map */
if (JFS_IP(ip)->ea.flag & DXD_EXTENT) {
/* free EA pages */
txEA(tid, ip, &JFS_IP(ip)->ea, NULL);
}
JFS_IP(ip)->ea.flag = 0;
/* free ACL from both persistent and working map */
if (JFS_IP(ip)->acl.flag & DXD_EXTENT) {
/* free ACL pages */
txEA(tid, ip, &JFS_IP(ip)->acl, NULL);
}
JFS_IP(ip)->acl.flag = 0;
/* mark the target directory as deleted */
ip->i_nlink = 0;
mark_inode_dirty(ip);
rc = txCommit(tid, 2, &iplist[0], 0);
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
/*
* Truncating the directory index table is not guaranteed. It
* may need to be done iteratively
*/
if (test_cflag(COMMIT_Stale, dip)) {
if (dip->i_size > 1)
jfs_truncate_nolock(dip, 0);
clear_cflag(COMMIT_Stale, dip);
}
out2:
free_UCSname(&dname);
out:
jFYI(1, ("jfs_rmdir: rc:%d\n", rc));
return -rc;
}
/*
* NAME: jfs_rename
*
* FUNCTION: rename a file or directory
*/
int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
struct btstack btstack;
ino_t ino;
struct component_name new_dname;
struct inode *new_ip;
struct component_name old_dname;
struct inode *old_ip;
int rc;
tid_t tid;
struct tlock *tlck;
struct dt_lock *dtlck;
struct lv *lv;
int ipcount;
struct inode *iplist[4];
struct tblock *tblk;
s64 new_size = 0;
int commit_flag;
jFYI(1,
("jfs_rename: %s %s\n", old_dentry->d_name.name,
new_dentry->d_name.name));
old_ip = old_dentry->d_inode;
new_ip = new_dentry->d_inode;
if ((rc = get_UCSname(&old_dname, old_dentry,
JFS_SBI(old_dir->i_sb)->nls_tab)))
goto out1;
if ((rc = get_UCSname(&new_dname, new_dentry,
JFS_SBI(old_dir->i_sb)->nls_tab)))
goto out2;
/*
* Make sure source inode number is what we think it is
*/
rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP);
if (rc || (ino != old_ip->i_ino)) {
rc = ENOENT;
goto out3;
}
/*
* Make sure dest inode number (if any) is what we think it is
*/
rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP);
if (rc == 0) {
if ((new_ip == 0) || (ino != new_ip->i_ino)) {
rc = ESTALE;
goto out3;
}
} else if (rc != ENOENT)
goto out3;
else if (new_ip) {
/* no entry exists, but one was expected */
rc = ESTALE;
goto out3;
}
if (S_ISDIR(old_ip->i_mode)) {
if (new_ip) {
if (!dtEmpty(new_ip)) {
rc = ENOTEMPTY;
goto out3;
}
} else if ((new_dir != old_dir) &&
(new_dir->i_nlink == JFS_LINK_MAX)) {
rc = EMLINK;
goto out3;
}
} else if (new_ip)
IWRITE_LOCK(new_ip);
/*
* The real work starts here
*/
tid = txBegin(new_dir->i_sb, 0);
down(&JFS_IP(new_dir)->commit_sem);
down(&JFS_IP(old_ip)->commit_sem);
if (old_dir != new_dir)
down(&JFS_IP(old_dir)->commit_sem);
if (new_ip) {
down(&JFS_IP(new_ip)->commit_sem);
/*
* Change existing directory entry to new inode number
*/
ino = new_ip->i_ino;
rc = dtModify(tid, new_dir, &new_dname, &ino,
old_ip->i_ino, JFS_RENAME);
if (rc)
goto out4;
new_ip->i_nlink--;
if (S_ISDIR(new_ip->i_mode)) {
new_ip->i_nlink--;
assert(new_ip->i_nlink == 0);
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_DELETE;
tblk->ip = new_ip;
} else if (new_ip->i_nlink == 0) {
assert(!test_cflag(COMMIT_Nolink, new_ip));
/* free block resources */
if ((new_size = commitZeroLink(tid, new_ip)) < 0) {
txAbort(tid, 1); /* Marks FS Dirty */
rc = -new_size; /* We return -rc */
goto out4;
}
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_DELETE;
tblk->ip = new_ip;
} else {
new_ip->i_ctime = CURRENT_TIME;
mark_inode_dirty(new_ip);
}
} else {
/*
* Add new directory entry
*/
rc = dtSearch(new_dir, &new_dname, &ino, &btstack,
JFS_CREATE);
if (rc) {
jERROR(1,
("jfs_rename didn't expect dtSearch to fail w/rc = %d\n",
rc));
goto out4;
}
ino = old_ip->i_ino;
rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack);
if (rc) {
jERROR(1,
("jfs_rename: dtInsert failed w/rc = %d\n",
rc));
goto out4;
}
if (S_ISDIR(old_ip->i_mode))
new_dir->i_nlink++;
}
/*
* Remove old directory entry
*/
ino = old_ip->i_ino;
rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE);
if (rc) {
jERROR(1,
("jfs_rename did not expect dtDelete to return rc = %d\n",
rc));
txAbort(tid, 1); /* Marks Filesystem dirty */
goto out4;
}
if (S_ISDIR(old_ip->i_mode)) {
old_dir->i_nlink--;
if (old_dir != new_dir) {
/*
* Change inode number of parent for moved directory
*/
JFS_IP(old_ip)->i_dtroot.header.idotdot =
cpu_to_le32(new_dir->i_ino);
/* Linelock header of dtree */
tlck = txLock(tid, old_ip,
(struct metapage *) &JFS_IP(old_ip)->bxflag,
tlckDTREE | tlckBTROOT);
dtlck = (struct dt_lock *) & tlck->lock;
ASSERT(dtlck->index == 0);
lv = & dtlck->lv[0];
lv->offset = 0;
lv->length = 1;
dtlck->index++;
}
}
/*
* Update ctime on changed/moved inodes & mark dirty
*/
old_ip->i_ctime = CURRENT_TIME;
mark_inode_dirty(old_ip);
new_dir->i_ctime = CURRENT_TIME;
mark_inode_dirty(new_dir);
/* Build list of inodes modified by this transaction */
ipcount = 0;
iplist[ipcount++] = old_ip;
if (new_ip)
iplist[ipcount++] = new_ip;
iplist[ipcount++] = old_dir;
if (old_dir != new_dir) {
iplist[ipcount++] = new_dir;
old_dir->i_ctime = CURRENT_TIME;
mark_inode_dirty(old_dir);
}
/*
* Incomplete truncate of file data can
* result in timing problems unless we synchronously commit the
* transaction.
*/
if (new_size)
commit_flag = COMMIT_SYNC;
else
commit_flag = 0;
rc = txCommit(tid, ipcount, iplist, commit_flag);
/*
* Don't unlock new_ip if COMMIT_HOLDLOCK is set
*/
if (new_ip && test_cflag(COMMIT_Holdlock, new_ip)) {
up(&JFS_IP(new_ip)->commit_sem);
new_ip = 0;
}
out4:
txEnd(tid);
up(&JFS_IP(new_dir)->commit_sem);
up(&JFS_IP(old_ip)->commit_sem);
if (old_dir != new_dir)
up(&JFS_IP(old_dir)->commit_sem);
if (new_ip)
up(&JFS_IP(new_ip)->commit_sem);
while (new_size && (rc == 0)) {
tid = txBegin(new_ip->i_sb, 0);
down(&JFS_IP(new_ip)->commit_sem);
new_size = xtTruncate_pmap(tid, new_ip, new_size);
if (new_size < 0) {
txAbort(tid, 1);
rc = -new_size; /* We return -rc */
} else
rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC);
txEnd(tid);
up(&JFS_IP(new_ip)->commit_sem);
}
if (new_ip && (new_ip->i_nlink == 0))
set_cflag(COMMIT_Nolink, new_ip);
out3:
free_UCSname(&new_dname);
out2:
free_UCSname(&old_dname);
out1:
if (new_ip && !S_ISDIR(new_ip->i_mode))
IWRITE_UNLOCK(new_ip);
/*
* Truncating the directory index table is not guaranteed. It
* may need to be done iteratively
*/
if (test_cflag(COMMIT_Stale, old_dir)) {
if (old_dir->i_size > 1)
jfs_truncate_nolock(old_dir, 0);
clear_cflag(COMMIT_Stale, old_dir);
}
jFYI(1, ("jfs_rename: returning %d\n", rc));
return -rc;
}
