/*
* NAME: jfs_init2()
*
* FUNCTION: bring up the JFS file system
*
* called by jfs_mount the first time the IFS calls it.
*
* PARAMETER: none
*
* RETURN: value returned from called routine
*/
int32
jfs_init2()
{
int32 rc;
int32 minCache;
int32 trythis;
jFYI(1,(" JFS Bring Up:\n"));
jFYI(1,("System Memory Size:%d Byte\n", MemorySize));
/*
* compute buffer cache size =
* MAX(ifs cachesize, 1 Meg), if specified, OR
* MIN(memory size/8, 64 Meg);
*/
minCache = 1*1024*1024;
if (CacheSize == 0) /* Not set in parse_args */
CacheSize = MIN(MemorySize >> 3, 64*1024*1024);
/* Enforce minimum of 1 Meg */
else if (CacheSize < minCache)
/*
* NAME: commitZeroLink()
*
* FUNCTION: for non-directory, called by jfs_remove(),
* truncate a regular file, directory or symbolic
* link to zero length. return 0 if type is not
* one of these.
*
* if the file is currently associated with a VM segment
* only permanent disk and inode map resources are freed,
* and neither the inode nor indirect blocks are modified
* so that the resources can be later freed in the work
* map by ctrunc1.
* if there is no VM segment on entry, the resources are
* freed in both work and permanent map.
* (? for temporary file - memory object is cached even
* after no reference:
* reference count > 0 - )
*
* PARAMETERS: cd - pointer to commit data structure.
* current inode is the one to truncate.
*
* RETURN : Errors from subroutines
*/
s64 commitZeroLink(tid_t tid, struct inode *ip)
{
int filetype;
struct tblock *tblk;
jFYI(1, ("commitZeroLink: tid = %d, ip = 0x%p\n", tid, ip));
filetype = ip->i_mode & S_IFMT;
switch (filetype) {
case S_IFREG:
break;
case S_IFLNK:
/* fast symbolic link */
if (ip->i_size <= 256) {
ip->i_size = 0;
return 0;
}
break;
default:
assert(filetype != S_IFDIR);
return 0;
}
set_cflag(COMMIT_Freewmap, ip);
/* mark transaction of block map update type */
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_PMAP;
/*
* free EA
*/
if (JFS_IP(ip)->ea.flag & DXD_EXTENT)
/* acquire maplock on EA to be freed from block map */
txEA(tid, ip, &JFS_IP(ip)->ea, NULL);
/*
* free ACL
*/
if (JFS_IP(ip)->acl.flag & DXD_EXTENT)
/* acquire maplock on EA to be freed from block map */
txEA(tid, ip, &JFS_IP(ip)->acl, NULL);
/*
* free xtree/data (truncate to zero length):
* free xtree/data pages from cache if COMMIT_PWMAP,
* free xtree/data blocks from persistent block map, and
* free xtree/data blocks from working block map if COMMIT_PWMAP;
*/
if (ip->i_size)
return xtTruncate_pmap(tid, ip, 0);
return 0;
}
static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry)
{
struct btstack btstack;
ino_t inum;
struct inode *ip;
struct component_name key;
const char *name = dentry->d_name.name;
int len = dentry->d_name.len;
int rc;
jFYI(1, ("jfs_lookup: name = %s\n", name));
if ((name[0] == '.') && (len == 1))
inum = dip->i_ino;
else if (strcmp(name, "..") == 0)
inum = PARENT(dip);
else {
if ((rc =
get_UCSname(&key, dentry, JFS_SBI(dip->i_sb)->nls_tab)))
return ERR_PTR(-rc);
rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP);
free_UCSname(&key);
if (rc == ENOENT) {
d_add(dentry, NULL);
return ERR_PTR(0);
} else if (rc) {
jERROR(1,
("jfs_lookup: dtSearch returned %d\n", rc));
return ERR_PTR(-rc);
}
}
ip = iget(dip->i_sb, inum);
if (ip == NULL) {
jERROR(1,
("jfs_lookup: iget failed on inum %d\n",
(uint) inum));
return ERR_PTR(-EACCES);
}
d_add(dentry, ip);
return ERR_PTR(0);
}
/*
* NAME: ialloc()
*
* FUNCTION: Allocate a new inode
*
*/
struct inode *ialloc(struct inode *parent, umode_t mode)
{
struct super_block *sb = parent->i_sb;
struct inode *inode;
struct jfs_inode_info *jfs_inode;
int rc;
inode = new_inode(sb);
if (!inode) {
jERROR(1, ("ialloc: new_inode returned NULL!\n"));
return inode;
}
rc = alloc_jfs_inode(inode);
if (rc) {
make_bad_inode(inode);
iput(inode);
return NULL;
}
jfs_inode = JFS_IP(inode);
rc = diAlloc(parent, S_ISDIR(mode), inode);
if (rc) {
jERROR(1, ("ialloc: diAlloc returned %d!\n", rc));
free_jfs_inode(inode);
make_bad_inode(inode);
iput(inode);
return NULL;
}
inode->i_uid = current->fsuid;
if (parent->i_mode & S_ISGID) {
inode->i_gid = parent->i_gid;
if (S_ISDIR(mode))
mode |= S_ISGID;
} else
inode->i_gid = current->fsgid;
inode->i_mode = mode;
if (S_ISDIR(mode))
jfs_inode->mode2 = IDIRECTORY | mode;
else
jfs_inode->mode2 = INLINEEA | ISPARSE | mode;
inode->i_blksize = sb->s_blocksize;
inode->i_blocks = 0;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
jfs_inode->otime = inode->i_ctime;
inode->i_generation = JFS_SBI(sb)->gengen++;
jfs_inode->cflag = 0;
set_cflag(COMMIT_New, inode);
/* Zero remaining fields */
memset(&jfs_inode->acl, 0, sizeof(dxd_t));
memset(&jfs_inode->ea, 0, sizeof(dxd_t));
jfs_inode->next_index = 0;
jfs_inode->acltype = 0;
jfs_inode->btorder = 0;
jfs_inode->btindex = 0;
jfs_inode->bxflag = 0;
jfs_inode->blid = 0;
jfs_inode->atlhead = 0;
jfs_inode->atltail = 0;
jfs_inode->xtlid = 0;
jFYI(1, ("ialloc returns inode = 0x%p\n", inode));
return inode;
}
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_link(vp, dvp, name, crp)
*
* FUNCTION: create a link to <vp> by the name = <name>
* in the parent directory <dvp>
*
* PARAMETER: vp - target object
* dvp - parent directory of new link
* name - name of new link to target object
* crp - credential
*
* RETURN: Errors from subroutines
*
* note:
* JFS does NOT support link() on directories (to prevent circular
* path in the directory hierarchy);
* EPERM: the target object is a directory, and either the caller
* does not have appropriate privileges or the implementation prohibits
* using link() on directories [XPG4.2].
*
* JFS does NOT support links between file systems:
* EXDEV: target object and new link are on different file systems and
* implementation does not support links between file systems [XPG4.2].
*/
int jfs_link(struct dentry *old_dentry,
struct inode *dir, struct dentry *dentry)
{
int rc;
tid_t tid;
struct inode *ip = old_dentry->d_inode;
ino_t ino;
struct component_name dname;
struct btstack btstack;
struct inode *iplist[2];
jFYI(1,
("jfs_link: %s %s\n", old_dentry->d_name.name,
dentry->d_name.name));
/* JFS does NOT support link() on directories */
if (S_ISDIR(ip->i_mode))
return -EPERM;
tid = txBegin(ip->i_sb, 0);
down(&JFS_IP(dir)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
if (ip->i_nlink == JFS_LINK_MAX) {
rc = EMLINK;
goto out;
}
/*
* scan parent directory for entry/freespace
*/
if ((rc = get_UCSname(&dname, dentry, JFS_SBI(ip->i_sb)->nls_tab)))
goto out;
if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE)))
goto out;
/*
* create entry for new link in parent directory
*/
ino = ip->i_ino;
if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack)))
goto out;
/* update object inode */
ip->i_nlink++; /* for new link */
ip->i_ctime = CURRENT_TIME;
mark_inode_dirty(dir);
atomic_inc(&ip->i_count);
d_instantiate(dentry, ip);
iplist[0] = ip;
iplist[1] = dir;
rc = txCommit(tid, 2, &iplist[0], 0);
out:
txEnd(tid);
up(&JFS_IP(dir)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
jFYI(1, ("jfs_link: rc:%d\n", rc));
return -rc;
}
/*
* NAME: freeZeroLink()
*
* FUNCTION: for non-directory, called by iClose(),
* free resources of a file from cache and WORKING map
* for a file previously committed with zero link count
* while associated with a pager object,
*
* PARAMETER: ip - pointer to inode of file.
*
* RETURN: 0 -ok
*/
int freeZeroLink(struct inode *ip)
{
int rc = 0;
int type;
jFYI(1, ("freeZeroLink: ip = 0x%p\n", ip));
/* return if not reg or symbolic link or if size is
* already ok.
*/
type = ip->i_mode & S_IFMT;
switch (type) {
case S_IFREG:
break;
case S_IFLNK:
/* if its contained in inode nothing to do */
if (ip->i_size <= 256)
return 0;
break;
default:
return 0;
}
/*
* free EA
*/
if (JFS_IP(ip)->ea.flag & DXD_EXTENT) {
s64 xaddr = addressDXD(&JFS_IP(ip)->ea);
int xlen = lengthDXD(&JFS_IP(ip)->ea);
struct maplock maplock; /* maplock for COMMIT_WMAP */
struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */
/* free EA pages from cache */
invalidate_dxd_metapages(ip, JFS_IP(ip)->ea);
/* free EA extent from working block map */
maplock.index = 1;
pxdlock = (struct pxd_lock *) & maplock;
pxdlock->flag = mlckFREEPXD;
PXDaddress(&pxdlock->pxd, xaddr);
PXDlength(&pxdlock->pxd, xlen);
txFreeMap(ip, pxdlock, 0, COMMIT_WMAP);
}
/*
* free ACL
*/
if (JFS_IP(ip)->acl.flag & DXD_EXTENT) {
s64 xaddr = addressDXD(&JFS_IP(ip)->acl);
int xlen = lengthDXD(&JFS_IP(ip)->acl);
struct maplock maplock; /* maplock for COMMIT_WMAP */
struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */
invalidate_dxd_metapages(ip, JFS_IP(ip)->acl);
/* free ACL extent from working block map */
maplock.index = 1;
pxdlock = (struct pxd_lock *) & maplock;
pxdlock->flag = mlckFREEPXD;
PXDaddress(&pxdlock->pxd, xaddr);
PXDlength(&pxdlock->pxd, xlen);
txFreeMap(ip, pxdlock, 0, COMMIT_WMAP);
}
/*
* free xtree/data (truncate to zero length):
* free xtree/data pages from cache, and
* free xtree/data blocks from working block map;
*/
if (ip->i_size)
rc = xtTruncate(0, ip, 0, COMMIT_WMAP);
return rc;
}
/*
* NAME: jfs_create(dip, dentry, mode)
*
* FUNCTION: create a regular file in the parent directory <dip>
* with name = <from dentry> and mode = <mode>
*
* PARAMETER: dip - parent directory vnode
* dentry - dentry of new file
* mode - create mode (rwxrwxrwx).
*
* RETURN: Errors from subroutines
*
*/
int jfs_create(struct inode *dip, struct dentry *dentry, int mode)
{
int rc = 0;
tid_t tid; /* transaction id */
struct inode *ip = NULL; /* child directory inode */
ino_t ino;
struct component_name dname; /* child directory name */
struct btstack btstack;
struct inode *iplist[2];
struct tblock *tblk;
jFYI(1, ("jfs_create: dip:0x%p name:%s\n", dip, dentry->d_name.name));
/*
* 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;
/*
* Either iAlloc() or txBegin() may block. Deadlock can occur if we
* block there while holding dtree page, so we allocate the inode &
* begin the transaction before we search the directory.
*/
ip = ialloc(dip, mode);
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))) {
jERROR(1, ("jfs_create: dtSearch returned %d\n", rc));
goto out3;
}
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_CREATE;
tblk->ip = ip;
iplist[0] = dip;
iplist[1] = ip;
/*
* initialize the child XAD tree root in-line in inode
*/
xtInitRoot(tid, ip);
/*
* create entry in parent directory for child directory
* (dtInsert() releases parent directory page)
*/
ino = ip->i_ino;
if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
jERROR(1, ("jfs_create: dtInsert returned %d\n", rc));
if (rc == EIO)
txAbort(tid, 1); /* Marks Filesystem dirty */
else
txAbort(tid, 0); /* Filesystem full */
goto out3;
}
ip->i_op = &jfs_file_inode_operations;
ip->i_fop = &jfs_file_operations;
ip->i_mapping->a_ops = &jfs_aops;
insert_inode_hash(ip);
mark_inode_dirty(ip);
d_instantiate(dentry, ip);
dip->i_ctime = dip->i_mtime = CURRENT_TIME;
mark_inode_dirty(dip);
rc = txCommit(tid, 2, &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_create: 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_mknod
*
* FUNCTION: Create a special file (device)
*/
int jfs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
{
struct btstack btstack;
struct component_name dname;
ino_t ino;
struct inode *ip;
struct inode *iplist[2];
int rc;
tid_t tid;
struct tblock *tblk;
jFYI(1, ("jfs_mknod: %s\n", dentry->d_name.name));
if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dir->i_sb)->nls_tab)))
goto out;
ip = ialloc(dir, mode);
if (ip == NULL) {
rc = ENOSPC;
goto out1;
}
tid = txBegin(dir->i_sb, 0);
down(&JFS_IP(dir)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE)))
goto out3;
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_CREATE;
tblk->ip = ip;
ino = ip->i_ino;
if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack)))
goto out3;
ip->i_op = &jfs_file_inode_operations;
init_special_inode(ip, ip->i_mode, rdev);
insert_inode_hash(ip);
mark_inode_dirty(ip);
d_instantiate(dentry, ip);
dir->i_ctime = dir->i_mtime = CURRENT_TIME;
mark_inode_dirty(dir);
iplist[0] = dir;
iplist[1] = ip;
rc = txCommit(tid, 2, iplist, 0);
out3:
txEnd(tid);
up(&JFS_IP(ip)->commit_sem);
up(&JFS_IP(dir)->commit_sem);
if (rc) {
ip->i_nlink = 0;
iput(ip);
}
out1:
free_UCSname(&dname);
out:
jFYI(1, ("jfs_mknod: returning %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;
}