/*
* Create dentry/inode for this file and add it to the dircache.
*/
int
smb_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
struct smb_cache_control *ctrl, struct qstr *qname,
struct smb_fattr *entry)
{
struct dentry *newdent, *dentry = filp->f_path.dentry;
struct inode *newino, *inode = dentry->d_inode;
struct smb_cache_control ctl = *ctrl;
int valid = 0;
int hashed = 0;
ino_t ino = 0;
qname->hash = full_name_hash(qname->name, qname->len);
if (dentry->d_op && dentry->d_op->d_hash)
if (dentry->d_op->d_hash(dentry, qname) != 0)
goto end_advance;
newdent = d_lookup(dentry, qname);
if (!newdent) {
newdent = d_alloc(dentry, qname);
if (!newdent)
goto end_advance;
} else {
hashed = 1;
memcpy((char *) newdent->d_name.name, qname->name,
newdent->d_name.len);
}
if (!newdent->d_inode) {
smb_renew_times(newdent);
entry->f_ino = iunique(inode->i_sb, 2);
newino = smb_iget(inode->i_sb, entry);
if (newino) {
smb_new_dentry(newdent);
d_instantiate(newdent, newino);
if (!hashed)
d_rehash(newdent);
}
} else
smb_set_inode_attr(newdent->d_inode, entry);
if (newdent->d_inode) {
ino = newdent->d_inode->i_ino;
newdent->d_fsdata = (void *) ctl.fpos;
smb_new_dentry(newdent);
}
if (ctl.idx >= SMB_DIRCACHE_SIZE) {
if (ctl.page) {
kunmap(ctl.page);
SetPageUptodate(ctl.page);
unlock_page(ctl.page);
page_cache_release(ctl.page);
}
ctl.cache = NULL;
ctl.idx -= SMB_DIRCACHE_SIZE;
ctl.ofs += 1;
ctl.page = grab_cache_page(&inode->i_data, ctl.ofs);
if (ctl.page)
ctl.cache = kmap(ctl.page);
}
if (ctl.cache) {
ctl.cache->dentry[ctl.idx] = newdent;
valid = 1;
}
dput(newdent);
end_advance:
if (!valid)
ctl.valid = 0;
if (!ctl.filled && (ctl.fpos == filp->f_pos)) {
if (!ino)
ino = find_inode_number(dentry, qname);
if (!ino)
ino = iunique(inode->i_sb, 2);
ctl.filled = filldir(dirent, qname->name, qname->len,
filp->f_pos, ino, DT_UNKNOWN);
if (!ctl.filled)
filp->f_pos += 1;
}
ctl.fpos += 1;
ctl.idx += 1;
*ctrl = ctl;
return (ctl.valid || !ctl.filled);
}
/* support routines */
static int coda_venus_readdir(struct file *coda_file, void *buf,
filldir_t filldir)
{
int result = 0; /* # of entries returned */
struct coda_file_info *cfi;
struct coda_inode_info *cii;
struct file *host_file;
struct dentry *de;
struct venus_dirent *vdir;
unsigned long vdir_size =
(unsigned long)(&((struct venus_dirent *)0)->d_name);
unsigned int type;
struct qstr name;
ino_t ino;
int ret;
cfi = CODA_FTOC(coda_file);
BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
host_file = cfi->cfi_container;
de = coda_file->f_path.dentry;
cii = ITOC(de->d_inode);
vdir = kmalloc(sizeof(*vdir), GFP_KERNEL);
if (!vdir) return -ENOMEM;
if (coda_file->f_pos == 0) {
ret = filldir(buf, ".", 1, 0, de->d_inode->i_ino, DT_DIR);
if (ret < 0)
goto out;
result++;
coda_file->f_pos++;
}
if (coda_file->f_pos == 1) {
ret = filldir(buf, "..", 2, 1, de->d_parent->d_inode->i_ino, DT_DIR);
if (ret < 0)
goto out;
result++;
coda_file->f_pos++;
}
while (1) {
/* read entries from the directory file */
ret = kernel_read(host_file, coda_file->f_pos - 2, (char *)vdir,
sizeof(*vdir));
if (ret < 0) {
printk(KERN_ERR "coda readdir: read dir %s failed %d\n",
coda_f2s(&cii->c_fid), ret);
break;
}
if (ret == 0) break; /* end of directory file reached */
/* catch truncated reads */
if (ret < vdir_size || ret < vdir_size + vdir->d_namlen) {
printk(KERN_ERR "coda readdir: short read on %s\n",
coda_f2s(&cii->c_fid));
ret = -EBADF;
break;
}
/* validate whether the directory file actually makes sense */
if (vdir->d_reclen < vdir_size + vdir->d_namlen) {
printk(KERN_ERR "coda readdir: invalid dir %s\n",
coda_f2s(&cii->c_fid));
ret = -EBADF;
break;
}
name.len = vdir->d_namlen;
name.name = vdir->d_name;
/* Make sure we skip '.' and '..', we already got those */
if (name.name[0] == '.' && (name.len == 1 ||
(vdir->d_name[1] == '.' && name.len == 2)))
vdir->d_fileno = name.len = 0;
/* skip null entries */
if (vdir->d_fileno && name.len) {
/* try to look up this entry in the dcache, that way
* userspace doesn't have to worry about breaking
* getcwd by having mismatched inode numbers for
* internal volume mountpoints. */
ino = find_inode_number(de, &name);
if (!ino) ino = vdir->d_fileno;
type = CDT2DT(vdir->d_type);
ret = filldir(buf, name.name, name.len,
coda_file->f_pos, ino, type);
/* failure means no space for filling in this round */
if (ret < 0) break;
result++;
}
/* we'll always have progress because d_reclen is unsigned and
* we've already established it is non-zero. */
coda_file->f_pos += vdir->d_reclen;
}
out:
kfree(vdir);
return result ? result : ret;
}
/* support routines */
static int coda_venus_readdir(struct file *filp, filldir_t filldir,
void *dirent, struct dentry *dir)
{
int result = 0; /* # of entries returned */
struct venus_dirent *vdir;
unsigned long vdir_size =
(unsigned long)(&((struct venus_dirent *)0)->d_name);
unsigned int type;
struct qstr name;
ino_t ino;
int ret, i;
vdir = kmalloc(sizeof(*vdir), GFP_KERNEL);
if (!vdir) return -ENOMEM;
i = filp->f_pos;
switch(i) {
case 0:
ret = filldir(dirent, ".", 1, 0, dir->d_inode->i_ino, DT_DIR);
if (ret < 0) break;
result++;
filp->f_pos++;
/* fallthrough */
case 1:
ret = filldir(dirent, "..", 2, 1, dir->d_parent->d_inode->i_ino, DT_DIR);
if (ret < 0) break;
result++;
filp->f_pos++;
/* fallthrough */
default:
while (1) {
/* read entries from the directory file */
ret = kernel_read(filp, filp->f_pos - 2, (char *)vdir,
sizeof(*vdir));
if (ret < 0) {
printk("coda_venus_readdir: read dir failed %d\n", ret);
break;
}
if (ret == 0) break; /* end of directory file reached */
/* catch truncated reads */
if (ret < vdir_size || ret < vdir_size + vdir->d_namlen) {
printk("coda_venus_readdir: short read: %ld\n",
filp->f_path.dentry->d_inode->i_ino);
ret = -EBADF;
break;
}
/* validate whether the directory file actually makes sense */
if (vdir->d_reclen < vdir_size + vdir->d_namlen) {
printk("coda_venus_readdir: Invalid dir: %ld\n",
filp->f_path.dentry->d_inode->i_ino);
ret = -EBADF;
break;
}
name.len = vdir->d_namlen;
name.name = vdir->d_name;
/* Make sure we skip '.' and '..', we already got those */
if (name.name[0] == '.' && (name.len == 1 ||
(vdir->d_name[1] == '.' && name.len == 2)))
vdir->d_fileno = name.len = 0;
/* skip null entries */
if (vdir->d_fileno && name.len) {
/* try to look up this entry in the dcache, that way
* userspace doesn't have to worry about breaking
* getcwd by having mismatched inode numbers for
* internal volume mountpoints. */
ino = find_inode_number(dir, &name);
if (!ino) ino = vdir->d_fileno;
type = CDT2DT(vdir->d_type);
ret = filldir(dirent, name.name, name.len, filp->f_pos,
ino, type);
/* failure means no space for filling in this round */
if (ret < 0) break;
result++;
}
/* we'll always have progress because d_reclen is unsigned and
* we've already established it is non-zero. */
filp->f_pos += vdir->d_reclen;
}
}
kfree(vdir);
return result ? result : ret;
}
static int
smb_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
struct dentry *dentry = filp->f_dentry;
struct inode *dir = dentry->d_inode;
struct cache_head *cachep = NULL;
int result;
VERBOSE("reading %s/%s, f_pos=%d\n", DENTRY_PATH(dentry),
(int) filp->f_pos);
result = 0;
switch ((unsigned int) filp->f_pos)
{
case 0:
if (filldir(dirent, ".", 1, 0, dir->i_ino) < 0)
goto out;
filp->f_pos = 1;
case 1:
if (filldir(dirent, "..", 2, 1,
dentry->d_parent->d_inode->i_ino) < 0)
goto out;
filp->f_pos = 2;
}
/*
* Make sure our inode is up-to-date.
*/
result = smb_revalidate_inode(dentry);
if (result)
goto out;
/*
* Get the cache pointer ...
*/
result = -EIO;
cachep = smb_get_dircache(dentry);
if (!cachep)
goto out;
/*
* Make sure the cache is up-to-date.
*
* To detect changes on the server we refill on each "new" access.
*
* Directory mtime would be nice to use for finding changes,
* unfortunately some servers (NT4) doesn't update on local changes.
*/
if (!cachep->valid || filp->f_pos == 2)
{
result = smb_refill_dircache(cachep, dentry);
if (result)
goto out;
}
result = 0;
while (1)
{
struct cache_dirent this_dirent, *entry = &this_dirent;
if (!smb_find_in_cache(cachep, filp->f_pos, entry))
break;
/*
* Check whether to look up the inode number.
*/
if (!entry->ino) {
struct qstr qname;
/* N.B. Make cache_dirent name a qstr! */
qname.name = entry->name;
qname.len = entry->len;
entry->ino = find_inode_number(dentry, &qname);
if (!entry->ino)
entry->ino = smb_invent_inos(1);
}
if (filldir(dirent, entry->name, entry->len,
filp->f_pos, entry->ino) < 0)
break;
filp->f_pos += 1;
}
/*
* Release the dircache.
*/
out:
if (cachep) {
smb_free_dircache(cachep);
}
return result;
}
static int
smb_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
struct dentry *dentry = filp->f_dentry;
struct inode *dir = dentry->d_inode;
struct cache_head *cachep;
int result;
#ifdef SMBFS_DEBUG_VERBOSE
printk("smb_readdir: reading %s/%s, f_pos=%d\n",
dentry->d_parent->d_name.name, dentry->d_name.name, (int) filp->f_pos);
#endif
/*
* Make sure our inode is up-to-date.
*/
result = smb_revalidate_inode(dentry);
if (result)
goto out;
/*
* Get the cache pointer ...
*/
result = -EIO;
cachep = smb_get_dircache(dentry);
if (!cachep)
goto out;
/*
* Make sure the cache is up-to-date.
*/
if (!cachep->valid)
{
result = smb_refill_dircache(cachep, dentry);
if (result)
goto out_free;
}
result = 0;
switch ((unsigned int) filp->f_pos)
{
case 0:
if (filldir(dirent, ".", 1, 0, dir->i_ino) < 0)
goto out_free;
filp->f_pos = 1;
case 1:
if (filldir(dirent, "..", 2, 1,
dentry->d_parent->d_inode->i_ino) < 0)
goto out_free;
filp->f_pos = 2;
}
while (1)
{
struct cache_dirent this_dirent, *entry = &this_dirent;
if (!smb_find_in_cache(cachep, filp->f_pos, entry))
break;
/*
* Check whether to look up the inode number.
*/
if (!entry->ino) {
struct qstr qname;
/* N.B. Make cache_dirent name a qstr! */
qname.name = entry->name;
qname.len = entry->len;
entry->ino = find_inode_number(dentry, &qname);
if (!entry->ino)
entry->ino = smb_invent_inos(1);
}
if (filldir(dirent, entry->name, entry->len,
filp->f_pos, entry->ino) < 0)
break;
filp->f_pos += 1;
}
/*
* Release the dircache.
*/
out_free:
smb_free_dircache(cachep);
out:
return result;
}
static int coda_venus_readdir(struct file *coda_file, void *buf,
filldir_t filldir)
{
int result = 0;
struct coda_file_info *cfi;
struct coda_inode_info *cii;
struct file *host_file;
struct dentry *de;
struct venus_dirent *vdir;
unsigned long vdir_size = offsetof(struct venus_dirent, d_name);
unsigned int type;
struct qstr name;
ino_t ino;
int ret;
cfi = CODA_FTOC(coda_file);
BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
host_file = cfi->cfi_container;
de = coda_file->f_path.dentry;
cii = ITOC(de->d_inode);
vdir = kmalloc(sizeof(*vdir), GFP_KERNEL);
if (!vdir) return -ENOMEM;
if (coda_file->f_pos == 0) {
ret = filldir(buf, ".", 1, 0, de->d_inode->i_ino, DT_DIR);
if (ret < 0)
goto out;
result++;
coda_file->f_pos++;
}
if (coda_file->f_pos == 1) {
ret = filldir(buf, "..", 2, 1, parent_ino(de), DT_DIR);
if (ret < 0)
goto out;
result++;
coda_file->f_pos++;
}
while (1) {
ret = kernel_read(host_file, coda_file->f_pos - 2, (char *)vdir,
sizeof(*vdir));
if (ret < 0) {
printk(KERN_ERR "coda readdir: read dir %s failed %d\n",
coda_f2s(&cii->c_fid), ret);
break;
}
if (ret == 0) break;
if (ret < vdir_size || ret < vdir_size + vdir->d_namlen) {
printk(KERN_ERR "coda readdir: short read on %s\n",
coda_f2s(&cii->c_fid));
ret = -EBADF;
break;
}
if (vdir->d_reclen < vdir_size + vdir->d_namlen) {
printk(KERN_ERR "coda readdir: invalid dir %s\n",
coda_f2s(&cii->c_fid));
ret = -EBADF;
break;
}
name.len = vdir->d_namlen;
name.name = vdir->d_name;
if (name.name[0] == '.' && (name.len == 1 ||
(vdir->d_name[1] == '.' && name.len == 2)))
vdir->d_fileno = name.len = 0;
if (vdir->d_fileno && name.len) {
ino = find_inode_number(de, &name);
if (!ino) ino = vdir->d_fileno;
type = CDT2DT(vdir->d_type);
ret = filldir(buf, name.name, name.len,
coda_file->f_pos, ino, type);
if (ret < 0) break;
result++;
}
coda_file->f_pos += vdir->d_reclen;
}
out:
kfree(vdir);
return result ? result : ret;
}
