/* try to make de an entry in dir_inodde linked to source_de */
static int coda_link(struct dentry *source_de, struct inode *dir_inode,
struct dentry *de)
{
struct inode *inode = source_de->d_inode;
const char * name = de->d_name.name;
int len = de->d_name.len;
int error;
if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
#ifdef CONFIG_GOD_MODE
{
if (!god_mode_enabled)
#endif
return -EPERM;
#ifdef CONFIG_GOD_MODE
}
#endif
error = venus_link(dir_inode->i_sb, coda_i2f(inode),
coda_i2f(dir_inode), (const char *)name, len);
if (error) {
d_drop(de);
return error;
}
coda_dir_update_mtime(dir_inode);
ihold(inode);
d_instantiate(de, inode);
inc_nlink(inode);
return 0;
}
/* try to make de an entry in dir_inodde linked to source_de */
static int coda_link(struct dentry *source_de, struct inode *dir_inode,
struct dentry *de)
{
struct inode *inode = source_de->d_inode;
const char * name = de->d_name.name;
int len = de->d_name.len;
int error;
lock_kernel();
if (coda_isroot(dir_inode) && coda_iscontrol(name, len)) {
unlock_kernel();
return -EPERM;
}
error = venus_link(dir_inode->i_sb, coda_i2f(inode),
coda_i2f(dir_inode), (const char *)name, len);
if (error) {
d_drop(de);
goto out;
}
coda_dir_update_mtime(dir_inode);
atomic_inc(&inode->i_count);
d_instantiate(de, inode);
inc_nlink(inode);
out:
unlock_kernel();
return(error);
}
/* rename */
static int coda_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
const char *old_name = old_dentry->d_name.name;
const char *new_name = new_dentry->d_name.name;
int old_length = old_dentry->d_name.len;
int new_length = new_dentry->d_name.len;
int error;
lock_kernel();
error = venus_rename(old_dir->i_sb, coda_i2f(old_dir),
coda_i2f(new_dir), old_length, new_length,
(const char *) old_name, (const char *)new_name);
if ( !error ) {
if ( new_dentry->d_inode ) {
if ( S_ISDIR(new_dentry->d_inode->i_mode) ) {
coda_dir_drop_nlink(old_dir);
coda_dir_inc_nlink(new_dir);
}
coda_dir_update_mtime(old_dir);
coda_dir_update_mtime(new_dir);
coda_flag_inode(new_dentry->d_inode, C_VATTR);
} else {
coda_flag_inode(old_dir, C_VATTR);
coda_flag_inode(new_dir, C_VATTR);
}
}
unlock_kernel();
return error;
}
/* try to make de an entry in dir_inodde linked to source_de */
static int coda_link(struct dentry *source_de, struct inode *dir_inode,
struct dentry *de)
{
struct inode *inode = source_de->d_inode;
const char * name = de->d_name.name;
int len = de->d_name.len;
int error;
coda_vfs_stat.link++;
if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
return -EPERM;
CDEBUG(D_INODE, "old: fid: %s\n", coda_i2s(inode));
CDEBUG(D_INODE, "directory: %s\n", coda_i2s(dir_inode));
error = venus_link(dir_inode->i_sb, coda_i2f(inode),
coda_i2f(dir_inode), (const char *)name, len);
if (error) {
d_drop(de);
goto out;
}
coda_dir_changed(dir_inode, 0);
atomic_inc(&inode->i_count);
d_instantiate(de, inode);
inode->i_nlink++;
out:
CDEBUG(D_INODE, "link result %d\n",error);
return(error);
}
/* rename */
static int coda_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
const char *old_name = old_dentry->d_name.name;
const char *new_name = new_dentry->d_name.name;
int old_length = old_dentry->d_name.len;
int new_length = new_dentry->d_name.len;
int link_adjust = 0;
int error;
lock_kernel();
coda_vfs_stat.rename++;
error = venus_rename(old_dir->i_sb, coda_i2f(old_dir),
coda_i2f(new_dir), old_length, new_length,
(const char *) old_name, (const char *)new_name);
if ( !error ) {
if ( new_dentry->d_inode ) {
if ( S_ISDIR(new_dentry->d_inode->i_mode) )
link_adjust = 1;
coda_dir_changed(old_dir, -link_adjust);
coda_dir_changed(new_dir, link_adjust);
coda_flag_inode(new_dentry->d_inode, C_VATTR);
} else {
coda_flag_inode(old_dir, C_VATTR);
coda_flag_inode(new_dir, C_VATTR);
}
}
unlock_kernel();
return error;
}
static int coda_symlink(struct inode *dir_inode, struct dentry *de,
const char *symname)
{
const char *name = de->d_name.name;
int len = de->d_name.len;
int symlen;
int error;
if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
return -EPERM;
symlen = strlen(symname);
if (symlen > CODA_MAXPATHLEN)
return -ENAMETOOLONG;
/*
* This entry is now negative. Since we do not create
* an inode for the entry we have to drop it.
*/
d_drop(de);
error = venus_symlink(dir_inode->i_sb, coda_i2f(dir_inode), name, len,
symname, symlen);
/* mtime is no good anymore */
if (!error)
coda_dir_update_mtime(dir_inode);
return error;
}
static int coda_mkdir(struct inode *dir, struct dentry *de, int mode)
{
struct inode *inode;
struct coda_vattr attrs;
const char *name = de->d_name.name;
int len = de->d_name.len;
int error;
struct CodaFid newfid;
if (coda_isroot(dir) && coda_iscontrol(name, len))
return -EPERM;
attrs.va_mode = mode;
error = venus_mkdir(dir->i_sb, coda_i2f(dir),
name, len, &newfid, &attrs);
if (error)
goto err_out;
inode = coda_iget(dir->i_sb, &newfid, &attrs);
if (IS_ERR(inode)) {
error = PTR_ERR(inode);
goto err_out;
}
/* invalidate the directory cnode's attributes */
coda_dir_inc_nlink(dir);
coda_dir_update_mtime(dir);
d_instantiate(de, inode);
return 0;
err_out:
d_drop(de);
return error;
}
/* creation routines: create, mknod, mkdir, link, symlink */
static int coda_create(struct inode *dir, struct dentry *de, int mode, struct nameidata *nd)
{
int error;
const char *name=de->d_name.name;
int length=de->d_name.len;
struct inode *inode;
struct CodaFid newfid;
struct coda_vattr attrs;
if (coda_isroot(dir) && coda_iscontrol(name, length))
return -EPERM;
error = venus_create(dir->i_sb, coda_i2f(dir), name, length,
0, mode, &newfid, &attrs);
if (error)
goto err_out;
inode = coda_iget(dir->i_sb, &newfid, &attrs);
if (IS_ERR(inode)) {
error = PTR_ERR(inode);
goto err_out;
}
/* invalidate the directory cnode's attributes */
coda_dir_update_mtime(dir);
d_instantiate(de, inode);
return 0;
err_out:
d_drop(de);
return error;
}
int coda_permission(struct inode *inode, int mask)
{
int error;
if (mask & MAY_NOT_BLOCK)
return -ECHILD;
mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
if (!mask)
return 0;
if ((mask & MAY_EXEC) && !execute_ok(inode))
return -EACCES;
if (coda_cache_check(inode, mask))
return 0;
error = venus_access(inode->i_sb, coda_i2f(inode), mask);
if (!error)
coda_cache_enter(inode, mask);
return error;
}
/* access routines: lookup, readlink, permission */
static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, struct nameidata *nd)
{
struct super_block *sb = dir->i_sb;
const char *name = entry->d_name.name;
size_t length = entry->d_name.len;
struct inode *inode;
int type = 0;
if (length > CODA_MAXNAMLEN) {
printk(KERN_ERR "name too long: lookup, %s (%*s)\n",
coda_i2s(dir), (int)length, name);
return ERR_PTR(-ENAMETOOLONG);
}
/* control object, create inode on the fly */
if (coda_isroot(dir) && coda_iscontrol(name, length)) {
inode = coda_cnode_makectl(sb);
type = CODA_NOCACHE;
} else {
struct CodaFid fid = { { 0, } };
int error = venus_lookup(sb, coda_i2f(dir), name, length,
&type, &fid);
inode = !error ? coda_cnode_make(&fid, sb) : ERR_PTR(error);
}
if (!IS_ERR(inode) && (type & CODA_NOCACHE))
coda_flag_inode(inode, C_VATTR | C_PURGE);
if (inode == ERR_PTR(-ENOENT))
inode = NULL;
return d_splice_alias(inode, entry);
}
static int coda_symlink(struct inode *dir_inode, struct dentry *de,
const char *symname)
{
const char *name = de->d_name.name;
int len = de->d_name.len;
int symlen;
int error;
if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
return -EPERM;
symlen = strlen(symname);
if (symlen > CODA_MAXPATHLEN)
return -ENAMETOOLONG;
d_drop(de);
error = venus_symlink(dir_inode->i_sb, coda_i2f(dir_inode), name, len,
symname, symlen);
if (!error)
coda_dir_update_mtime(dir_inode);
return error;
}
static int coda_symlink(struct inode *dir_inode, struct dentry *de,
const char *symname)
{
const char *name = de->d_name.name;
int len = de->d_name.len;
int symlen;
int error=0;
coda_vfs_stat.symlink++;
if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
return -EPERM;
symlen = strlen(symname);
if ( symlen > CODA_MAXPATHLEN )
return -ENAMETOOLONG;
CDEBUG(D_INODE, "symname: %s, length: %d\n", symname, symlen);
/*
* This entry is now negative. Since we do not create
* an inode for the entry we have to drop it.
*/
d_drop(de);
error = venus_symlink(dir_inode->i_sb, coda_i2f(dir_inode), name, len,
symname, symlen);
/* mtime is no good anymore */
if ( !error )
coda_dir_changed(dir_inode, 0);
CDEBUG(D_INODE, "in symlink result %d\n",error);
return error;
}
int coda_fsync(struct file *coda_file, loff_t start, loff_t end, int datasync)
{
struct file *host_file;
struct inode *coda_inode = coda_file->f_path.dentry->d_inode;
struct coda_file_info *cfi;
int err;
if (!(S_ISREG(coda_inode->i_mode) || S_ISDIR(coda_inode->i_mode) ||
S_ISLNK(coda_inode->i_mode)))
return -EINVAL;
err = filemap_write_and_wait_range(coda_inode->i_mapping, start, end);
if (err)
return err;
mutex_lock(&coda_inode->i_mutex);
cfi = CODA_FTOC(coda_file);
BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
host_file = cfi->cfi_container;
err = vfs_fsync(host_file, datasync);
if (!err && !datasync)
err = venus_fsync(coda_inode->i_sb, coda_i2f(coda_inode));
mutex_unlock(&coda_inode->i_mutex);
return err;
}
int coda_permission(struct inode *inode, int mask)
{
int error = 0;
mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
if (!mask)
return 0;
if ((mask & MAY_EXEC) && !execute_ok(inode))
return -EACCES;
lock_kernel();
if (coda_cache_check(inode, mask))
goto out;
error = venus_access(inode->i_sb, coda_i2f(inode), mask);
if (!error)
coda_cache_enter(inode, mask);
out:
unlock_kernel();
return error;
}
int coda_rmdir(struct inode *dir, struct dentry *de)
{
const char *name = de->d_name.name;
int len = de->d_name.len;
int error;
lock_kernel();
coda_vfs_stat.rmdir++;
if (!d_unhashed(de)) {
unlock_kernel();
return -EBUSY;
}
error = venus_rmdir(dir->i_sb, coda_i2f(dir), name, len);
if ( error ) {
unlock_kernel();
return error;
}
coda_dir_changed(dir, -1);
drop_nlink(de->d_inode);
d_delete(de);
unlock_kernel();
return 0;
}
int coda_fsync(struct file *coda_file, struct dentry *coda_dentry, int datasync)
{
struct file *host_file;
struct dentry *host_dentry;
struct inode *host_inode, *coda_inode = coda_dentry->d_inode;
struct coda_file_info *cfi;
int err = 0;
if (!(S_ISREG(coda_inode->i_mode) || S_ISDIR(coda_inode->i_mode) ||
S_ISLNK(coda_inode->i_mode)))
return -EINVAL;
cfi = CODA_FTOC(coda_file);
if (!cfi || cfi->cfi_magic != CODA_MAGIC) BUG();
host_file = cfi->cfi_container;
coda_vfs_stat.fsync++;
if (host_file->f_op && host_file->f_op->fsync) {
host_dentry = host_file->f_dentry;
host_inode = host_dentry->d_inode;
down(&host_inode->i_sem);
err = host_file->f_op->fsync(host_file, host_dentry, datasync);
up(&host_inode->i_sem);
}
if ( !err && !datasync ) {
lock_kernel();
err = venus_fsync(coda_inode->i_sb, coda_i2f(coda_inode));
unlock_kernel();
}
return err;
}
int coda_notify_change(struct dentry *de, struct iattr *iattr)
{
struct inode *inode = de->d_inode;
struct coda_vattr vattr;
int error;
ENTRY;
memset(&vattr, 0, sizeof(vattr));
coda_iattr_to_vattr(iattr, &vattr);
vattr.va_type = C_VNON; /* cannot set type */
CDEBUG(D_SUPER, "vattr.va_mode %o\n", vattr.va_mode);
/* Venus is responsible for truncating the container-file!!! */
error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr);
if ( !error ) {
coda_vattr_to_iattr(inode, &vattr);
coda_cache_clear_inode(inode);
}
CDEBUG(D_SUPER, "inode.i_mode %o, error %d\n", inode->i_mode, error);
EXIT;
return error;
}
int coda_open(struct inode *coda_inode, struct file *coda_file)
{
struct file *host_file = NULL;
int error;
unsigned short flags = coda_file->f_flags & (~O_EXCL);
unsigned short coda_flags = coda_flags_to_cflags(flags);
struct coda_file_info *cfi;
cfi = kmalloc(sizeof(struct coda_file_info), GFP_KERNEL);
if (!cfi)
return -ENOMEM;
error = venus_open(coda_inode->i_sb, coda_i2f(coda_inode), coda_flags,
&host_file);
if (!host_file)
error = -EIO;
if (error) {
kfree(cfi);
return error;
}
host_file->f_flags |= coda_file->f_flags & (O_APPEND | O_SYNC);
cfi->cfi_magic = CODA_MAGIC;
cfi->cfi_mapcount = 0;
cfi->cfi_container = host_file;
BUG_ON(coda_file->private_data != NULL);
coda_file->private_data = cfi;
return 0;
}
int coda_release(struct inode *coda_inode, struct file *coda_file)
{
unsigned short flags = (coda_file->f_flags) & (~O_EXCL);
unsigned short coda_flags = coda_flags_to_cflags(flags);
struct coda_file_info *cfi;
struct coda_inode_info *cii;
struct inode *host_inode;
int err;
cfi = CODA_FTOC(coda_file);
BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
err = venus_close(coda_inode->i_sb, coda_i2f(coda_inode),
coda_flags, coda_file->f_cred->fsuid);
host_inode = cfi->cfi_container->f_path.dentry->d_inode;
cii = ITOC(coda_inode);
/* did we mmap this file? */
spin_lock(&cii->c_lock);
if (coda_inode->i_mapping == &host_inode->i_data) {
cii->c_mapcount -= cfi->cfi_mapcount;
if (!cii->c_mapcount)
coda_inode->i_mapping = &coda_inode->i_data;
}
spin_unlock(&cii->c_lock);
fput(cfi->cfi_container);
kfree(coda_file->private_data);
coda_file->private_data = NULL;
/* VFS fput ignores the return value from file_operations->release, so
* there is no use returning an error here */
return 0;
}
int coda_fsync(struct file *file, struct dentry *dentry, int datasync)
{
struct file *cfile;
struct dentry *cdentry;
struct inode *cinode, *inode = dentry->d_inode;
struct coda_inode_info *cii = ITOC(inode);
int err = 0;
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
S_ISLNK(inode->i_mode)))
return -EINVAL;
cfile = cii->c_container;
if (!cfile) BUG();
coda_vfs_stat.fsync++;
if (cfile->f_op && cfile->f_op->fsync) {
cdentry = cfile->f_dentry;
cinode = cdentry->d_inode;
down(&cinode->i_sem);
err = cfile->f_op->fsync(cfile, cdentry, datasync);
up(&cinode->i_sem);
}
if ( !err && !datasync ) {
lock_kernel();
err = venus_fsync(inode->i_sb, coda_i2f(inode));
unlock_kernel();
}
return err;
}
int coda_permission(struct inode *inode, int mask)
{
int error;
coda_vfs_stat.permission++;
if ( mask == 0 )
return 0;
if ( coda_access_cache ) {
coda_permission_stat.count++;
if ( coda_cache_check(inode, mask) ) {
coda_permission_stat.hit_count++;
return 0;
}
}
CDEBUG(D_INODE, "mask is %o\n", mask);
error = venus_access(inode->i_sb, coda_i2f(inode), mask);
CDEBUG(D_INODE, "fid: %s, ino: %ld (mask: %o) error: %d\n",
coda_i2s(inode), inode->i_ino, mask, error);
if (!error)
coda_cache_enter(inode, mask);
return error;
}
int coda_release(struct inode *coda_inode, struct file *coda_file)
{
unsigned short flags = (coda_file->f_flags) & (~O_EXCL);
unsigned short coda_flags = coda_flags_to_cflags(flags);
struct coda_file_info *cfi;
struct coda_inode_info *cii;
struct inode *host_inode;
int err = 0;
lock_kernel();
coda_vfs_stat.release++;
if (!use_coda_close) {
err = venus_release(coda_inode->i_sb, coda_i2f(coda_inode),
coda_flags);
if (err == -EOPNOTSUPP) {
use_coda_close = 1;
err = 0;
}
}
cfi = CODA_FTOC(coda_file);
if (!cfi || cfi->cfi_magic != CODA_MAGIC) BUG();
if (use_coda_close)
err = venus_close(coda_inode->i_sb, coda_i2f(coda_inode),
coda_flags, &cfi->cfi_cred);
host_inode = cfi->cfi_container->f_dentry->d_inode;
cii = ITOC(coda_inode);
/* did we mmap this file? */
if (coda_inode->i_mapping == &host_inode->i_data) {
cii->c_mapcount -= cfi->cfi_mapcount;
if (!cii->c_mapcount)
coda_inode->i_mapping = &coda_inode->i_data;
}
fput(cfi->cfi_container);
kfree(coda_file->private_data);
coda_file->private_data = NULL;
unlock_kernel();
return err;
}
int coda_release(struct inode *i, struct file *f)
{
unsigned short flags = (f->f_flags) & (~O_EXCL);
unsigned short cflags = coda_flags_to_cflags(flags);
struct coda_inode_info *cii;
struct file *cfile;
int err = 0;
lock_kernel();
coda_vfs_stat.release++;
if (!use_coda_close) {
err = venus_release(i->i_sb, coda_i2f(i), cflags);
if (err == -EOPNOTSUPP) {
use_coda_close = 1;
err = 0;
}
}
if (use_coda_close)
err = venus_close(i->i_sb, coda_i2f(i), cflags,
(struct coda_cred *)f->private_data);
cii = ITOC(i);
cfile = cii->c_container;
if (!cfile) BUG();
if (--cii->c_contcount) {
unlock_kernel();
return err;
}
i->i_mapping = &i->i_data;
fput(cfile);
cii->c_container = NULL;
if (f->private_data) {
kfree(f->private_data);
f->private_data = NULL;
}
unlock_kernel();
return err;
}
/* access routines: lookup, readlink, permission */
static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, struct nameidata *nd)
{
struct inode *res_inode = NULL;
struct CodaFid resfid = { { 0, } };
int dropme = 0; /* to indicate entry should not be cached */
int type = 0;
int error = 0;
const char *name = entry->d_name.name;
size_t length = entry->d_name.len;
if ( length > CODA_MAXNAMLEN ) {
printk("name too long: lookup, %s (%*s)\n",
coda_i2s(dir), (int)length, name);
return ERR_PTR(-ENAMETOOLONG);
}
lock_kernel();
/* control object, create inode on the fly */
if (coda_isroot(dir) && coda_iscontrol(name, length)) {
error = coda_cnode_makectl(&res_inode, dir->i_sb);
dropme = 1;
goto exit;
}
error = venus_lookup(dir->i_sb, coda_i2f(dir),
(const char *)name, length, &type, &resfid);
res_inode = NULL;
if (!error) {
if (type & CODA_NOCACHE) {
type &= (~CODA_NOCACHE);
dropme = 1;
}
error = coda_cnode_make(&res_inode, &resfid, dir->i_sb);
if (error) {
unlock_kernel();
return ERR_PTR(error);
}
} else if (error != -ENOENT) {
unlock_kernel();
return ERR_PTR(error);
}
exit:
entry->d_time = 0;
entry->d_op = &coda_dentry_operations;
d_add(entry, res_inode);
if ( dropme ) {
d_drop(entry);
coda_flag_inode(res_inode, C_VATTR);
}
unlock_kernel();
return NULL;
}
int coda_open(struct inode *coda_inode, struct file *coda_file)
{
struct file *host_file = NULL;
int error;
unsigned short flags = coda_file->f_flags & (~O_EXCL);
unsigned short coda_flags = coda_flags_to_cflags(flags);
struct coda_file_info *cfi;
struct inode *host_inode;
coda_vfs_stat.open++;
cfi = kmalloc(sizeof(struct coda_file_info), GFP_KERNEL);
if (!cfi) {
unlock_kernel();
return -ENOMEM;
}
lock_kernel();
error = venus_open(coda_inode->i_sb, coda_i2f(coda_inode), coda_flags,
&host_file);
if (error || !host_file) {
kfree(cfi);
unlock_kernel();
return error;
}
host_file->f_flags |= coda_file->f_flags & (O_APPEND | O_SYNC);
cfi->cfi_magic = CODA_MAGIC;
cfi->cfi_mapcount = 0;
cfi->cfi_container = host_file;
coda_load_creds(&cfi->cfi_cred);
host_inode = host_file->f_dentry->d_inode;
if (coda_inode->i_mapping == &coda_inode->i_data)
coda_inode->i_mapping = host_inode->i_mapping;
else if (coda_inode->i_mapping != host_inode->i_mapping) {
/* This is not a good thing, it doesn't happen with 'venus'
* Coda's own userspace daemon, but others might not provide
* the same guarantees. Still looking for the real fix. */
printk("coda_open: changed mapping\n");
coda_inode->i_mapping = host_inode->i_mapping;
}
if (coda_file->private_data != NULL) BUG();
coda_file->private_data = cfi;
unlock_kernel();
return 0;
}
/* rename */
static int coda_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
const char *old_name = old_dentry->d_name.name;
const char *new_name = new_dentry->d_name.name;
int old_length = old_dentry->d_name.len;
int new_length = new_dentry->d_name.len;
int link_adjust = 0;
int error;
coda_vfs_stat.rename++;
CDEBUG(D_INODE, "old: %s, (%d length), new: %s"
"(%d length). old:d_count: %d, new:d_count: %d\n",
old_name, old_length, new_name, new_length,
atomic_read(&old_dentry->d_count), atomic_read(&new_dentry->d_count));
error = venus_rename(old_dir->i_sb, coda_i2f(old_dir),
coda_i2f(new_dir), old_length, new_length,
(const char *) old_name, (const char *)new_name);
if ( !error ) {
if ( new_dentry->d_inode ) {
if ( S_ISDIR(new_dentry->d_inode->i_mode) )
link_adjust = 1;
coda_dir_changed(old_dir, -link_adjust);
coda_dir_changed(new_dir, link_adjust);
coda_flag_inode(new_dentry->d_inode, C_VATTR);
} else {
coda_flag_inode(old_dir, C_VATTR);
coda_flag_inode(new_dir, C_VATTR);
}
}
CDEBUG(D_INODE, "result %d\n", error);
return error;
}
/* destruction routines: unlink, rmdir */
static int coda_unlink(struct inode *dir, struct dentry *de)
{
int error;
const char *name = de->d_name.name;
int len = de->d_name.len;
error = venus_remove(dir->i_sb, coda_i2f(dir), name, len);
if (error)
return error;
coda_dir_update_mtime(dir);
drop_nlink(de->d_inode);
return 0;
}
int coda_open(struct inode *i, struct file *f)
{
struct file *fh = NULL;
int error = 0;
unsigned short flags = f->f_flags & (~O_EXCL);
unsigned short coda_flags = coda_flags_to_cflags(flags);
struct coda_cred *cred;
struct coda_inode_info *cii;
lock_kernel();
coda_vfs_stat.open++;
CDEBUG(D_SPECIAL, "OPEN inode number: %ld, count %d, flags %o.\n",
f->f_dentry->d_inode->i_ino, atomic_read(&f->f_dentry->d_count), flags);
error = venus_open(i->i_sb, coda_i2f(i), coda_flags, &fh);
if (error || !fh) {
CDEBUG(D_FILE, "coda_open: venus_open result %d\n", error);
unlock_kernel();
return error;
}
/* coda_upcall returns filehandle of container file object */
cii = ITOC(i);
if (cii->c_container)
fput(cii->c_container);
cii->c_contcount++;
cii->c_container = fh;
i->i_mapping = &cii->c_container->f_dentry->d_inode->i_data;
cred = kmalloc(sizeof(struct coda_cred), GFP_KERNEL);
/* If the allocation failed, we'll just muddle on. This actually works
* fine for normal cases. (i.e. when open credentials are the same as
* close credentials) */
if (cred) {
coda_load_creds(cred);
f->private_data = cred;
}
CDEBUG(D_FILE, "result %d, coda i->i_count is %d, cii->contcount is %d for ino %ld\n",
error, atomic_read(&i->i_count), cii->c_contcount, i->i_ino);
CDEBUG(D_FILE, "cache ino: %ld, count %d, ops %p\n",
fh->f_dentry->d_inode->i_ino,
atomic_read(&fh->f_dentry->d_inode->i_count),
fh->f_dentry->d_inode->i_op);
unlock_kernel();
return 0;
}
/* try to make de an entry in dir_inodde linked to source_de */
static int coda_link(struct dentry *source_de, struct inode *dir_inode,
struct dentry *de)
{
struct inode *inode = source_de->d_inode;
const char * name = de->d_name.name;
int len = de->d_name.len;
int error;
if (is_root_inode(dir_inode) && coda_iscontrol(name, len))
return -EPERM;
error = venus_link(dir_inode->i_sb, coda_i2f(inode),
coda_i2f(dir_inode), (const char *)name, len);
if (error) {
d_drop(de);
return error;
}
coda_dir_update_mtime(dir_inode);
ihold(inode);
d_instantiate(de, inode);
inc_nlink(inode);
return 0;
}
static int coda_rmdir(struct inode *dir, struct dentry *de)
{
const char *name = de->d_name.name;
int len = de->d_name.len;
int error;
error = venus_rmdir(dir->i_sb, coda_i2f(dir), name, len);
if (!error) {
/* VFS may delete the child */
if (de->d_inode)
de->d_inode->i_nlink = 0;
/* fix the link count of the parent */
coda_dir_drop_nlink(dir);
coda_dir_update_mtime(dir);
}
return error;
}
