/* 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);
}
/* 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;
}
/* access routines: lookup, readlink, permission */
static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, struct nameidata *nd)
{
struct inode *inode = NULL;
struct CodaFid resfid = { { 0, } };
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(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)) {
error = coda_cnode_makectl(&inode, dir->i_sb);
type = CODA_NOCACHE;
goto exit;
}
lock_kernel();
error = venus_lookup(dir->i_sb, coda_i2f(dir), name, length,
&type, &resfid);
if (!error)
error = coda_cnode_make(&inode, &resfid, dir->i_sb);
unlock_kernel();
if (error && error != -ENOENT)
return ERR_PTR(error);
exit:
entry->d_op = &coda_dentry_operations;
if (inode && (type & CODA_NOCACHE))
coda_flag_inode(inode, C_VATTR | C_PURGE);
return d_splice_alias(inode, entry);
}
/* access routines: lookup, readlink, permission */
static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry)
{
struct inode *res_inode = NULL;
struct ViceFid resfid = {0,0,0};
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);
}
CDEBUG(D_INODE, "name %s, len %ld in ino %ld, fid %s\n",
name, (long)length, dir->i_ino, coda_i2s(dir));
/* control object, create inode on the fly */
if (coda_isroot(dir) && coda_iscontrol(name, length)) {
error = coda_cnode_makectl(&res_inode, dir->i_sb);
CDEBUG(D_SPECIAL,
"Lookup on CTL object; dir ino %ld, count %d\n",
dir->i_ino, atomic_read(&dir->i_count));
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);
CDEBUG(D_INODE, "dropme set for %s\n",
coda_f2s(&resfid));
dropme = 1;
}
error = coda_cnode_make(&res_inode, &resfid, dir->i_sb);
if (error) return ERR_PTR(error);
} else if (error != -ENOENT) {
CDEBUG(D_INODE, "error for %s(%*s)%d\n",
coda_i2s(dir), (int)length, name, error);
return ERR_PTR(error);
}
CDEBUG(D_INODE, "lookup: %s is (%s), type %d result %d, dropme %d\n",
name, coda_f2s(&resfid), type, error, dropme);
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);
}
return NULL;
}