int jffs2_mkdir (struct inode *dir_i, struct qstr *d_name, int mode, struct inode **new_i)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
uint32_t alloclen, phys_ofs;
uint32_t writtenlen;
int ret;
mode |= S_IFDIR;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = d_name->len;
ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
f = JFFS2_INODE_INFO(inode);
ri->data_crc = 0;
ri->node_crc = crc32(0, ri, sizeof(*ri)-8);
fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, &writtenlen);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
up(&f->sem);
/* Work out where to put the dirent node now. */
writtenlen = PAD(writtenlen);
phys_ofs += writtenlen;
alloclen -= writtenlen;
if (alloclen < sizeof(*rd)+namelen) {
/* Not enough space left in this chunk. Get some more */
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
jffs2_clear_inode(inode);
return ret;
}
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + namelen;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = inode->i_ino;
rd->mctime = CURRENT_TIME;
rd->nsize = namelen;
rd->type = DT_DIR;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, d_name->name, namelen);
fd = jffs2_write_dirent(c, dir_f, rd, d_name->name, namelen, phys_ofs, &writtenlen);
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
up(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
*new_i = inode;
return 0;
}
static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
uint32_t alloclen;
int ret;
mode |= S_IFDIR;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL,
JFFS2_SUMMARY_INODE_SIZE);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_dir_inode_operations;
inode->i_fop = &jffs2_dir_operations;
f = JFFS2_INODE_INFO(inode);
/* Directories get nlink 2 at start */
inode->i_nlink = 2;
/* but ic->pino_nlink is the parent ino# */
f->inocache->pino_nlink = dir_i->i_ino;
ri->data_crc = cpu_to_je32(0);
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = PTR_ERR(fn);
goto fail;
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
if (ret)
goto fail;
ret = jffs2_init_acl_post(inode);
if (ret)
goto fail;
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
if (ret)
goto fail;
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
ret = -ENOMEM;
goto fail;
}
dir_f = JFFS2_INODE_INFO(dir_i);
mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(get_seconds());
rd->nsize = namelen;
rd->type = DT_DIR;
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
mutex_unlock(&dir_f->sem);
ret = PTR_ERR(fd);
goto fail;
}
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
inc_nlink(dir_i);
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
return 0;
fail:
iget_failed(inode);
return ret;
}
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
union jffs2_device_node dev;
int devlen = 0;
uint32_t alloclen;
int ret;
if (!new_valid_dev(rdev))
return -EINVAL;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
if (S_ISBLK(mode) || S_ISCHR(mode))
devlen = jffs2_encode_dev(&dev, rdev);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_file_inode_operations;
init_special_inode(inode, inode->i_mode, rdev);
f = JFFS2_INODE_INFO(inode);
ri->dsize = ri->csize = cpu_to_je32(devlen);
ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
ri->compr = JFFS2_COMPR_NONE;
ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = PTR_ERR(fn);
goto fail;
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
if (ret)
goto fail;
ret = jffs2_init_acl_post(inode);
if (ret)
goto fail;
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
if (ret)
goto fail;
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
ret = -ENOMEM;
goto fail;
}
dir_f = JFFS2_INODE_INFO(dir_i);
mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(get_seconds());
rd->nsize = namelen;
/* XXX: This is ugly. */
rd->type = (mode & S_IFMT) >> 12;
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
mutex_unlock(&dir_f->sem);
ret = PTR_ERR(fd);
goto fail;
}
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
return 0;
fail:
iget_failed(inode);
return ret;
}
int jffs2_mkdir (struct _inode *dir_i, const unsigned char *d_name, int mode)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct _inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
uint32_t alloclen, phys_ofs;
int ret;
mode |= S_IFDIR;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = strlen((char *)d_name);
ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
f = JFFS2_INODE_INFO(inode);
ri->data_crc = cpu_to_je32(0);
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, ALLOC_NORMAL);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
inode->i_nlink = 0;
jffs2_iput(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
up(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
inode->i_nlink = 0;
jffs2_iput(inode);
return ret;
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
inode->i_nlink = 0;
jffs2_iput(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(jffs2_get_timestamp());
rd->nsize = namelen;
rd->type = DT_DIR;
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
rd->name_crc = cpu_to_je32(crc32(0, d_name, namelen));
fd = jffs2_write_dirent(c, dir_f, rd, d_name, namelen, phys_ofs, ALLOC_NORMAL);
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
up(&dir_f->sem);
inode->i_nlink = 0;
jffs2_iput(inode);
return PTR_ERR(fd);
}
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
jffs2_iput(inode);
return 0;
}
static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
uint32_t alloclen;
int ret, targetlen = strlen(target);
/* FIXME: If you care. We'd need to use frags for the target
if it grows much more than this */
if (targetlen > 254)
return -ENAMETOOLONG;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_symlink_inode_operations;
f = JFFS2_INODE_INFO(inode);
inode->i_size = targetlen;
ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size);
ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size);
ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
ri->compr = JFFS2_COMPR_NONE;
ri->data_crc = cpu_to_je32(crc32(0, target, targetlen));
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = PTR_ERR(fn);
goto fail;
}
/* We use f->target field to store the target path. */
f->target = kmemdup(target, targetlen + 1, GFP_KERNEL);
if (!f->target) {
;
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = -ENOMEM;
goto fail;
}
D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
if (ret)
goto fail;
ret = jffs2_init_acl_post(inode);
if (ret)
goto fail;
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
if (ret)
goto fail;
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
ret = -ENOMEM;
goto fail;
}
dir_f = JFFS2_INODE_INFO(dir_i);
mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(get_seconds());
rd->nsize = namelen;
rd->type = DT_LNK;
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
mutex_unlock(&dir_f->sem);
ret = PTR_ERR(fd);
goto fail;
}
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
return 0;
fail:
iget_failed(inode);
return ret;
}
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, int rdev)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
unsigned short dev;
int devlen = 0;
__u32 alloclen, phys_ofs;
__u32 writtenlen;
int ret;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
if (S_ISBLK(mode) || S_ISCHR(mode)) {
dev = (MAJOR(to_kdev_t(rdev)) << 8) | MINOR(to_kdev_t(rdev));
devlen = sizeof(dev);
}
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_file_inode_operations;
init_special_inode(inode, inode->i_mode, rdev);
f = JFFS2_INODE_INFO(inode);
ri->dsize = ri->csize = devlen;
ri->totlen = sizeof(*ri) + ri->csize;
ri->hdr_crc = crc32(0, ri, sizeof(struct jffs2_unknown_node)-4);
ri->compr = JFFS2_COMPR_NONE;
ri->data_crc = crc32(0, &dev, devlen);
ri->node_crc = crc32(0, ri, sizeof(*ri)-8);
fn = jffs2_write_dnode(inode, ri, (char *)&dev, devlen, phys_ofs, &writtenlen);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
up(&f->sem);
/* Work out where to put the dirent node now. */
writtenlen = (writtenlen+3)&~3;
phys_ofs += writtenlen;
alloclen -= writtenlen;
if (alloclen < sizeof(*rd)+namelen) {
/* Not enough space left in this chunk. Get some more */
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
jffs2_clear_inode(inode);
return ret;
}
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + namelen;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = inode->i_ino;
rd->mctime = CURRENT_TIME;
rd->nsize = namelen;
/* XXX: This is ugly. */
rd->type = (mode & S_IFMT) >> 12;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, dentry->d_name.name, namelen);
fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen);
jffs2_complete_reservation(c);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_free_raw_dirent(rd);
up(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
dir_i->i_mtime = dir_i->i_ctime = rd->mctime;
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
d_instantiate(dentry, inode);
return 0;
}
static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
__u32 alloclen, phys_ofs;
__u32 writtenlen;
int ret;
/* FIXME: If you care. We'd need to use frags for the target
if it grows much more than this */
if (strlen(target) > 254)
return -EINVAL;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri) + strlen(target), &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_symlink_inode_operations;
f = JFFS2_INODE_INFO(inode);
inode->i_size = ri->isize = ri->dsize = ri->csize = strlen(target);
ri->totlen = sizeof(*ri) + ri->dsize;
ri->hdr_crc = crc32(0, ri, sizeof(struct jffs2_unknown_node)-4);
ri->compr = JFFS2_COMPR_NONE;
ri->data_crc = crc32(0, target, strlen(target));
ri->node_crc = crc32(0, ri, sizeof(*ri)-8);
fn = jffs2_write_dnode(inode, ri, target, strlen(target), phys_ofs, &writtenlen);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
up(&f->sem);
/* Work out where to put the dirent node now. */
writtenlen = (writtenlen+3)&~3;
phys_ofs += writtenlen;
alloclen -= writtenlen;
if (alloclen < sizeof(*rd)+namelen) {
/* Not enough space left in this chunk. Get some more */
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
jffs2_clear_inode(inode);
return ret;
}
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + namelen;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = inode->i_ino;
rd->mctime = CURRENT_TIME;
rd->nsize = namelen;
rd->type = DT_LNK;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, dentry->d_name.name, namelen);
fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen);
jffs2_complete_reservation(c);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_free_raw_dirent(rd);
up(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
dir_i->i_mtime = dir_i->i_ctime = rd->mctime;
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
d_instantiate(dentry, inode);
return 0;
}
static int jffs2_do_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry, int rename)
{
struct jffs2_inode_info *dir_f, *f;
struct jffs2_sb_info *c;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dirent *fd;
__u32 alloclen, phys_ofs;
int ret;
c = JFFS2_SB_INFO(dir_i->i_sb);
rd = jffs2_alloc_raw_dirent();
if (!rd)
return -ENOMEM;
ret = jffs2_reserve_space(c, sizeof(*rd)+dentry->d_name.len, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_dirent(rd);
return ret;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
/* Build a deletion node */
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + dentry->d_name.len;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = old_dentry->d_inode->i_ino;
rd->mctime = CURRENT_TIME;
rd->nsize = dentry->d_name.len;
/* XXX: This is ugly. */
rd->type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
if (!rd->type) rd->type = DT_REG;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, dentry->d_name.name, dentry->d_name.len);
fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, dentry->d_name.len, phys_ofs, NULL);
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
if (IS_ERR(fd)) {
up(&dir_f->sem);
return PTR_ERR(fd);
}
/* File it. This will mark the old one obsolete. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
if (!rename) {
f = JFFS2_INODE_INFO(old_dentry->d_inode);
down(&f->sem);
old_dentry->d_inode->i_nlink = ++f->inocache->nlink;
up(&f->sem);
}
return 0;
}
static int jffs2_do_unlink(struct inode *dir_i, struct dentry *dentry, int rename)
{
struct jffs2_inode_info *dir_f, *f;
struct jffs2_sb_info *c;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dirent *fd;
__u32 alloclen, phys_ofs;
int ret;
c = JFFS2_SB_INFO(dir_i->i_sb);
rd = jffs2_alloc_raw_dirent();
if (!rd)
return -ENOMEM;
ret = jffs2_reserve_space(c, sizeof(*rd)+dentry->d_name.len, &phys_ofs, &alloclen, ALLOC_DELETION);
if (ret) {
jffs2_free_raw_dirent(rd);
return ret;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
/* Build a deletion node */
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + dentry->d_name.len;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = 0;
rd->mctime = CURRENT_TIME;
rd->nsize = dentry->d_name.len;
rd->type = DT_UNKNOWN;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, dentry->d_name.name, dentry->d_name.len);
fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, dentry->d_name.len, phys_ofs, NULL);
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
if (IS_ERR(fd)) {
up(&dir_f->sem);
return PTR_ERR(fd);
}
/* File it. This will mark the old one obsolete. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
if (!rename) {
f = JFFS2_INODE_INFO(dentry->d_inode);
down(&f->sem);
while (f->dents) {
/* There can be only deleted ones */
fd = f->dents;
f->dents = fd->next;
if (fd->ino) {
printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n",
f->inocache->ino, fd->name, fd->ino);
} else {
D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", fd->name, f->inocache->ino));
}
jffs2_mark_node_obsolete(c, fd->raw);
jffs2_free_full_dirent(fd);
}
/* Don't oops on unlinking a bad inode */
if (f->inocache)
f->inocache->nlink--;
dentry->d_inode->i_nlink--;
up(&f->sem);
}
return 0;
}
static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
__u32 alloclen, phys_ofs;
__u32 writtenlen;
int ret;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
D1(printk(KERN_DEBUG "jffs2_create()\n"));
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL);
D1(printk(KERN_DEBUG "jffs2_create(): reserved 0x%x bytes\n", alloclen));
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_file_inode_operations;
inode->i_fop = &jffs2_file_operations;
inode->i_mapping->a_ops = &jffs2_file_address_operations;
inode->i_mapping->nrpages = 0;
f = JFFS2_INODE_INFO(inode);
ri->data_crc = 0;
ri->node_crc = crc32(0, ri, sizeof(*ri)-8);
fn = jffs2_write_dnode(inode, ri, NULL, 0, phys_ofs, &writtenlen);
D1(printk(KERN_DEBUG "jffs2_create created file with mode 0x%x\n", ri->mode));
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n"));
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
/* Work out where to put the dirent node now. */
writtenlen = PAD(writtenlen);
phys_ofs += writtenlen;
alloclen -= writtenlen;
up(&f->sem);
if (alloclen < sizeof(*rd)+namelen) {
/* Not enough space left in this chunk. Get some more */
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n"));
jffs2_clear_inode(inode);
return ret;
}
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + namelen;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = inode->i_ino;
rd->mctime = CURRENT_TIME;
rd->nsize = namelen;
rd->type = DT_REG;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, dentry->d_name.name, namelen);
fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen);
jffs2_complete_reservation(c);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_free_raw_dirent(rd);
up(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
dir_i->i_mtime = dir_i->i_ctime = rd->mctime;
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
d_instantiate(dentry, inode);
D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
return 0;
}
