Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1260 insertions, 0 deletions

diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
new file mode 100644
index 000000000000..2dc2d8693968
--- /dev/null
+++ b/fs/ncpfs/dir.c
@@ -0,0 +1,1260 @@
+/*
+ *  dir.c
+ *
+ *  Copyright (C) 1995, 1996 by Volker Lendecke
+ *  Modified for big endian by J.F. Chadima and David S. Miller
+ *  Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
+ *  Modified 1998, 1999 Wolfram Pienkoss for NLS
+ *  Modified 1999 Wolfram Pienkoss for directory caching
+ *  Modified 2000 Ben Harris, University of Cambridge for NFS NS meta-info
+ *
+ */
+
+#include <linux/config.h>
+
+#include <linux/time.h>
+#include <linux/errno.h>
+#include <linux/stat.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+#include <asm/uaccess.h>
+#include <asm/byteorder.h>
+#include <linux/smp_lock.h>
+
+#include <linux/ncp_fs.h>
+
+#include "ncplib_kernel.h"
+
+static void ncp_read_volume_list(struct file *, void *, filldir_t,
+                                struct ncp_cache_control *);
+static void ncp_do_readdir(struct file *, void *, filldir_t,
+                                struct ncp_cache_control *);
+
+static int ncp_readdir(struct file *, void *, filldir_t);
+
+static int ncp_create(struct inode *, struct dentry *, int, struct nameidata *);
+static struct dentry *ncp_lookup(struct inode *, struct dentry *, struct nameidata *);
+static int ncp_unlink(struct inode *, struct dentry *);
+static int ncp_mkdir(struct inode *, struct dentry *, int);
+static int ncp_rmdir(struct inode *, struct dentry *);
+static int ncp_rename(struct inode *, struct dentry *,
+                      struct inode *, struct dentry *);
+static int ncp_mknod(struct inode * dir, struct dentry *dentry,
+                     int mode, dev_t rdev);
+#if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS)
+extern int ncp_symlink(struct inode *, struct dentry *, const char *);
+#else
+#define ncp_symlink NULL
+#endif
+                      
+struct file_operations ncp_dir_operations =
+{
+        .read           = generic_read_dir,
+        .readdir        = ncp_readdir,
+        .ioctl          = ncp_ioctl,
+};
+
+struct inode_operations ncp_dir_inode_operations =
+{
+        .create         = ncp_create,
+        .lookup         = ncp_lookup,
+        .unlink         = ncp_unlink,
+        .symlink        = ncp_symlink,
+        .mkdir          = ncp_mkdir,
+        .rmdir          = ncp_rmdir,
+        .mknod          = ncp_mknod,
+        .rename         = ncp_rename,
+        .setattr        = ncp_notify_change,
+};
+
+/*
+ * Dentry operations routines
+ */
+static int ncp_lookup_validate(struct dentry *, struct nameidata *);
+static int ncp_hash_dentry(struct dentry *, struct qstr *);
+static int ncp_compare_dentry (struct dentry *, struct qstr *, struct qstr *);
+static int ncp_delete_dentry(struct dentry *);
+
+static struct dentry_operations ncp_dentry_operations =
+{
+        .d_revalidate   = ncp_lookup_validate,
+        .d_hash         = ncp_hash_dentry,
+        .d_compare      = ncp_compare_dentry,
+        .d_delete       = ncp_delete_dentry,
+};
+
+struct dentry_operations ncp_root_dentry_operations =
+{
+        .d_hash         = ncp_hash_dentry,
+        .d_compare      = ncp_compare_dentry,
+        .d_delete       = ncp_delete_dentry,
+};
+
+
+/*
+ * Note: leave the hash unchanged if the directory
+ * is case-sensitive.
+ */
+static int 
+ncp_hash_dentry(struct dentry *dentry, struct qstr *this)
+{
+        struct nls_table *t;
+        unsigned long hash;
+        int i;
+
+        t = NCP_IO_TABLE(dentry);
+
+        if (!ncp_case_sensitive(dentry->d_inode)) {
+                hash = init_name_hash();
+                for (i=0; i<this->len ; i++)
+                        hash = partial_name_hash(ncp_tolower(t, this->name[i]),
+                                                                        hash);
+                this->hash = end_name_hash(hash);
+        }
+        return 0;
+}
+
+static int
+ncp_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b)
+{
+        if (a->len != b->len)
+                return 1;
+
+        if (ncp_case_sensitive(dentry->d_inode))
+                return strncmp(a->name, b->name, a->len);
+
+        return ncp_strnicmp(NCP_IO_TABLE(dentry), a->name, b->name, a->len);
+}
+
+/*
+ * This is the callback from dput() when d_count is going to 0.
+ * We use this to unhash dentries with bad inodes.
+ * Closing files can be safely postponed until iput() - it's done there anyway.
+ */
+static int
+ncp_delete_dentry(struct dentry * dentry)
+{
+        struct inode *inode = dentry->d_inode;
+
+        if (inode) {
+                if (is_bad_inode(inode))
+                        return 1;
+        } else
+        {
+        /* N.B. Unhash negative dentries? */
+        }
+        return 0;
+}
+
+static inline int
+ncp_single_volume(struct ncp_server *server)
+{
+        return (server->m.mounted_vol[0] != '\0');
+}
+
+static inline int ncp_is_server_root(struct inode *inode)
+{
+        return (!ncp_single_volume(NCP_SERVER(inode)) &&
+                inode == inode->i_sb->s_root->d_inode);
+}
+
+
+/*
+ * This is the callback when the dcache has a lookup hit.
+ */
+
+
+#ifdef CONFIG_NCPFS_STRONG
+/* try to delete a readonly file (NW R bit set) */
+
+static int
+ncp_force_unlink(struct inode *dir, struct dentry* dentry)
+{
+        int res=0x9c,res2;
+        struct nw_modify_dos_info info;
+        __le32 old_nwattr;
+        struct inode *inode;
+
+        memset(&info, 0, sizeof(info));
+        
+        /* remove the Read-Only flag on the NW server */
+        inode = dentry->d_inode;
+
+        old_nwattr = NCP_FINFO(inode)->nwattr;
+        info.attributes = old_nwattr & ~(aRONLY|aDELETEINHIBIT|aRENAMEINHIBIT);
+        res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info);
+        if (res2)
+                goto leave_me;
+
+        /* now try again the delete operation */
+        res = ncp_del_file_or_subdir2(NCP_SERVER(dir), dentry);
+
+        if (res)  /* delete failed, set R bit again */
+        {
+                info.attributes = old_nwattr;
+                res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info);
+                if (res2)
+                        goto leave_me;
+        }
+leave_me:
+        return(res);
+}
+#endif  /* CONFIG_NCPFS_STRONG */
+
+#ifdef CONFIG_NCPFS_STRONG
+static int
+ncp_force_rename(struct inode *old_dir, struct dentry* old_dentry, char *_old_name,
+                 struct inode *new_dir, struct dentry* new_dentry, char *_new_name)
+{
+        struct nw_modify_dos_info info;
+        int res=0x90,res2;
+        struct inode *old_inode = old_dentry->d_inode;
+        __le32 old_nwattr = NCP_FINFO(old_inode)->nwattr;
+        __le32 new_nwattr = 0; /* shut compiler warning */
+        int old_nwattr_changed = 0;
+        int new_nwattr_changed = 0;
+
+        memset(&info, 0, sizeof(info));
+        
+        /* remove the Read-Only flag on the NW server */
+
+        info.attributes = old_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
+        res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info);
+        if (!res2)
+                old_nwattr_changed = 1;
+        if (new_dentry && new_dentry->d_inode) {
+                new_nwattr = NCP_FINFO(new_dentry->d_inode)->nwattr;
+                info.attributes = new_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
+                res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info);
+                if (!res2)
+                        new_nwattr_changed = 1;
+        }
+        /* now try again the rename operation */
+        /* but only if something really happened */
+        if (new_nwattr_changed || old_nwattr_changed) {
+                res = ncp_ren_or_mov_file_or_subdir(NCP_SERVER(old_dir),
+                                                    old_dir, _old_name,
+                                                    new_dir, _new_name);
+        } 
+        if (res)
+                goto leave_me;
+        /* file was successfully renamed, so:
+           do not set attributes on old file - it no longer exists
+           copy attributes from old file to new */
+        new_nwattr_changed = old_nwattr_changed;
+        new_nwattr = old_nwattr;
+        old_nwattr_changed = 0;
+        
+leave_me:;
+        if (old_nwattr_changed) {
+                info.attributes = old_nwattr;
+                res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info);
+                /* ignore errors */
+        }
+        if (new_nwattr_changed) {
+                info.attributes = new_nwattr;
+                res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info);
+                /* ignore errors */
+        }
+        return(res);
+}
+#endif  /* CONFIG_NCPFS_STRONG */
+
+
+static int
+__ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd)
+{
+        struct ncp_server *server;
+        struct dentry *parent;
+        struct inode *dir;
+        struct ncp_entry_info finfo;
+        int res, val = 0, len;
+        __u8 __name[NCP_MAXPATHLEN + 1];
+
+        parent = dget_parent(dentry);
+        dir = parent->d_inode;
+
+        if (!dentry->d_inode)
+                goto finished;
+
+        server = NCP_SERVER(dir);
+
+        if (!ncp_conn_valid(server))
+                goto finished;
+
+        /*
+         * Inspired by smbfs:
+         * The default validation is based on dentry age:
+         * We set the max age at mount time.  (But each
+         * successful server lookup renews the timestamp.)
+         */
+        val = NCP_TEST_AGE(server, dentry);
+        if (val)
+                goto finished;
+
+        DDPRINTK("ncp_lookup_validate: %s/%s not valid, age=%ld, server lookup\n",
+                dentry->d_parent->d_name.name, dentry->d_name.name,
+                NCP_GET_AGE(dentry));
+
+        len = sizeof(__name);
+        if (ncp_is_server_root(dir)) {
+                res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
+                                 dentry->d_name.len, 1);
+                if (!res)
+                        res = ncp_lookup_volume(server, __name, &(finfo.i));
+        } else {
+                res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
+                                 dentry->d_name.len, !ncp_preserve_case(dir));
+                if (!res)
+                        res = ncp_obtain_info(server, dir, __name, &(finfo.i));
+        }
+        finfo.volume = finfo.i.volNumber;
+        DDPRINTK("ncp_lookup_validate: looked for %s/%s, res=%d\n",
+                dentry->d_parent->d_name.name, __name, res);
+        /*
+         * If we didn't find it, or if it has a different dirEntNum to
+         * what we remember, it's not valid any more.
+         */
+        if (!res) {
+                if (finfo.i.dirEntNum == NCP_FINFO(dentry->d_inode)->dirEntNum) {
+                        ncp_new_dentry(dentry);
+                        val=1;
+                } else
+                        DDPRINTK("ncp_lookup_validate: found, but dirEntNum changed\n");
+
+                ncp_update_inode2(dentry->d_inode, &finfo);
+        }
+
+finished:
+        DDPRINTK("ncp_lookup_validate: result=%d\n", val);
+        dput(parent);
+        return val;
+}
+
+static int
+ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd)
+{
+        int res;
+        lock_kernel();
+        res = __ncp_lookup_validate(dentry, nd);
+        unlock_kernel();
+        return res;
+}
+
+static struct dentry *
+ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos)
+{
+        struct dentry *dent = dentry;
+        struct list_head *next;
+
+        if (d_validate(dent, parent)) {
+                if (dent->d_name.len <= NCP_MAXPATHLEN &&
+                    (unsigned long)dent->d_fsdata == fpos) {
+                        if (!dent->d_inode) {
+                                dput(dent);
+                                dent = NULL;
+                        }
+                        return dent;
+                }
+                dput(dent);
+        }
+
+        /* If a pointer is invalid, we search the dentry. */
+        spin_lock(&dcache_lock);
+        next = parent->d_subdirs.next;
+        while (next != &parent->d_subdirs) {
+                dent = list_entry(next, struct dentry, d_child);
+                if ((unsigned long)dent->d_fsdata == fpos) {
+                        if (dent->d_inode)
+                                dget_locked(dent);
+                        else
+                                dent = NULL;
+                        spin_unlock(&dcache_lock);
+                        goto out;
+                }
+                next = next->next;
+        }
+        spin_unlock(&dcache_lock);
+        return NULL;
+
+out:
+        return dent;
+}
+
+static time_t ncp_obtain_mtime(struct dentry *dentry)
+{
+        struct inode *inode = dentry->d_inode;
+        struct ncp_server *server = NCP_SERVER(inode);
+        struct nw_info_struct i;
+
+        if (!ncp_conn_valid(server) || ncp_is_server_root(inode))
+                return 0;
+
+        if (ncp_obtain_info(server, inode, NULL, &i))
+                return 0;
+
+        return ncp_date_dos2unix(i.modifyTime, i.modifyDate);
+}
+
+static int ncp_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+        struct dentry *dentry = filp->f_dentry;
+        struct inode *inode = dentry->d_inode;
+        struct page *page = NULL;
+        struct ncp_server *server = NCP_SERVER(inode);
+        union  ncp_dir_cache *cache = NULL;
+        struct ncp_cache_control ctl;
+        int result, mtime_valid = 0;
+        time_t mtime = 0;
+
+        lock_kernel();
+
+        ctl.page  = NULL;
+        ctl.cache = NULL;
+
+        DDPRINTK("ncp_readdir: reading %s/%s, pos=%d\n",
+                dentry->d_parent->d_name.name, dentry->d_name.name,
+                (int) filp->f_pos);
+
+        result = -EIO;
+        if (!ncp_conn_valid(server))
+                goto out;
+
+        result = 0;
+        if (filp->f_pos == 0) {
+                if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR))
+                        goto out;
+                filp->f_pos = 1;
+        }
+        if (filp->f_pos == 1) {
+                if (filldir(dirent, "..", 2, 1, parent_ino(dentry), DT_DIR))
+                        goto out;
+                filp->f_pos = 2;
+        }
+
+        page = grab_cache_page(&inode->i_data, 0);
+        if (!page)
+                goto read_really;
+
+        ctl.cache = cache = kmap(page);
+        ctl.head  = cache->head;
+
+        if (!PageUptodate(page) || !ctl.head.eof)
+                goto init_cache;
+
+        if (filp->f_pos == 2) {
+                if (jiffies - ctl.head.time >= NCP_MAX_AGE(server))
+                        goto init_cache;
+
+                mtime = ncp_obtain_mtime(dentry);
+                mtime_valid = 1;
+                if ((!mtime) || (mtime != ctl.head.mtime))
+                        goto init_cache;
+        }
+
+        if (filp->f_pos > ctl.head.end)
+                goto finished;
+
+        ctl.fpos = filp->f_pos + (NCP_DIRCACHE_START - 2);
+        ctl.ofs  = ctl.fpos / NCP_DIRCACHE_SIZE;
+        ctl.idx  = ctl.fpos % NCP_DIRCACHE_SIZE;
+
+        for (;;) {
+                if (ctl.ofs != 0) {
+                        ctl.page = find_lock_page(&inode->i_data, ctl.ofs);
+                        if (!ctl.page)
+                                goto invalid_cache;
+                        ctl.cache = kmap(ctl.page);
+                        if (!PageUptodate(ctl.page))
+                                goto invalid_cache;
+                }
+                while (ctl.idx < NCP_DIRCACHE_SIZE) {
+                        struct dentry *dent;
+                        int res;
+
+                        dent = ncp_dget_fpos(ctl.cache->dentry[ctl.idx],
+                                                dentry, filp->f_pos);
+                        if (!dent)
+                                goto invalid_cache;
+                        res = filldir(dirent, dent->d_name.name,
+                                        dent->d_name.len, filp->f_pos,
+                                        dent->d_inode->i_ino, DT_UNKNOWN);
+                        dput(dent);
+                        if (res)
+                                goto finished;
+                        filp->f_pos += 1;
+                        ctl.idx += 1;
+                        if (filp->f_pos > ctl.head.end)
+                                goto finished;
+                }
+                if (ctl.page) {
+                        kunmap(ctl.page);
+                        SetPageUptodate(ctl.page);
+                        unlock_page(ctl.page);
+                        page_cache_release(ctl.page);
+                        ctl.page = NULL;
+                }
+                ctl.idx  = 0;
+                ctl.ofs += 1;
+        }
+invalid_cache:
+        if (ctl.page) {
+                kunmap(ctl.page);
+                unlock_page(ctl.page);
+                page_cache_release(ctl.page);
+                ctl.page = NULL;
+        }
+        ctl.cache = cache;
+init_cache:
+        ncp_invalidate_dircache_entries(dentry);
+        if (!mtime_valid) {
+                mtime = ncp_obtain_mtime(dentry);
+                mtime_valid = 1;
+        }
+        ctl.head.mtime = mtime;
+        ctl.head.time = jiffies;
+        ctl.head.eof = 0;
+        ctl.fpos = 2;
+        ctl.ofs = 0;
+        ctl.idx = NCP_DIRCACHE_START;
+        ctl.filled = 0;
+        ctl.valid  = 1;
+read_really:
+        if (ncp_is_server_root(inode)) {
+                ncp_read_volume_list(filp, dirent, filldir, &ctl);
+        } else {
+                ncp_do_readdir(filp, dirent, filldir, &ctl);
+        }
+        ctl.head.end = ctl.fpos - 1;
+        ctl.head.eof = ctl.valid;
+finished:
+        if (page) {
+                cache->head = ctl.head;
+                kunmap(page);
+                SetPageUptodate(page);
+                unlock_page(page);
+                page_cache_release(page);
+        }
+        if (ctl.page) {
+                kunmap(ctl.page);
+                SetPageUptodate(ctl.page);
+                unlock_page(ctl.page);
+                page_cache_release(ctl.page);
+        }
+out:
+        unlock_kernel();
+        return result;
+}
+
+static int
+ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
+                struct ncp_cache_control *ctrl, struct ncp_entry_info *entry)
+{
+        struct dentry *newdent, *dentry = filp->f_dentry;
+        struct inode *newino, *inode = dentry->d_inode;
+        struct ncp_cache_control ctl = *ctrl;
+        struct qstr qname;
+        int valid = 0;
+        int hashed = 0;
+        ino_t ino = 0;
+        __u8 __name[NCP_MAXPATHLEN + 1];
+
+        qname.len = sizeof(__name);
+        if (ncp_vol2io(NCP_SERVER(inode), __name, &qname.len,
+                        entry->i.entryName, entry->i.nameLen,
+                        !ncp_preserve_entry_case(inode, entry->i.NSCreator)))
+                return 1; /* I'm not sure */
+
+        qname.name = __name;
+        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) {
+                entry->opened = 0;
+                entry->ino = iunique(inode->i_sb, 2);
+                newino = ncp_iget(inode->i_sb, entry);
+                if (newino) {
+                        newdent->d_op = &ncp_dentry_operations;
+                        d_instantiate(newdent, newino);
+                        if (!hashed)
+                                d_rehash(newdent);
+                }
+        } else
+                ncp_update_inode2(newdent->d_inode, entry);
+
+        if (newdent->d_inode) {
+                ino = newdent->d_inode->i_ino;
+                newdent->d_fsdata = (void *) ctl.fpos;
+                ncp_new_dentry(newdent);
+        }
+
+        if (ctl.idx >= NCP_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  -= NCP_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);
+}
+
+static void
+ncp_read_volume_list(struct file *filp, void *dirent, filldir_t filldir,
+                        struct ncp_cache_control *ctl)
+{
+        struct dentry *dentry = filp->f_dentry;
+        struct inode *inode = dentry->d_inode;
+        struct ncp_server *server = NCP_SERVER(inode);
+        struct ncp_volume_info info;
+        struct ncp_entry_info entry;
+        int i;
+
+        DPRINTK("ncp_read_volume_list: pos=%ld\n",
+                        (unsigned long) filp->f_pos);
+
+        for (i = 0; i < NCP_NUMBER_OF_VOLUMES; i++) {
+
+                if (ncp_get_volume_info_with_number(server, i, &info) != 0)
+                        return;
+                if (!strlen(info.volume_name))
+                        continue;
+
+                DPRINTK("ncp_read_volume_list: found vol: %s\n",
+                        info.volume_name);
+
+                if (ncp_lookup_volume(server, info.volume_name,
+                                        &entry.i)) {
+                        DPRINTK("ncpfs: could not lookup vol %s\n",
+                                info.volume_name);
+                        continue;
+                }
+                entry.volume = entry.i.volNumber;
+                if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry))
+                        return;
+        }
+}
+
+static void
+ncp_do_readdir(struct file *filp, void *dirent, filldir_t filldir,
+                                                struct ncp_cache_control *ctl)
+{
+        struct dentry *dentry = filp->f_dentry;
+        struct inode *dir = dentry->d_inode;
+        struct ncp_server *server = NCP_SERVER(dir);
+        struct nw_search_sequence seq;
+        struct ncp_entry_info entry;
+        int err;
+        void* buf;
+        int more;
+        size_t bufsize;
+
+        DPRINTK("ncp_do_readdir: %s/%s, fpos=%ld\n",
+                dentry->d_parent->d_name.name, dentry->d_name.name,
+                (unsigned long) filp->f_pos);
+        PPRINTK("ncp_do_readdir: init %s, volnum=%d, dirent=%u\n",
+                dentry->d_name.name, NCP_FINFO(dir)->volNumber,
+                NCP_FINFO(dir)->dirEntNum);
+
+        err = ncp_initialize_search(server, dir, &seq);
+        if (err) {
+                DPRINTK("ncp_do_readdir: init failed, err=%d\n", err);
+                return;
+        }
+#ifdef USE_OLD_SLOW_DIRECTORY_LISTING
+        for (;;) {
+                err = ncp_search_for_file_or_subdir(server, &seq, &entry.i);
+                if (err) {
+                        DPRINTK("ncp_do_readdir: search failed, err=%d\n", err);
+                        break;
+                }
+                entry.volume = entry.i.volNumber;
+                if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry))
+                        break;
+        }
+#else
+        /* We MUST NOT use server->buffer_size handshaked with server if we are
+           using UDP, as for UDP server uses max. buffer size determined by
+           MTU, and for TCP server uses hardwired value 65KB (== 66560 bytes). 
+           So we use 128KB, just to be sure, as there is no way how to know
+           this value in advance. */
+        bufsize = 131072;
+        buf = vmalloc(bufsize);
+        if (!buf)
+                return;
+        do {
+                int cnt;
+                char* rpl;
+                size_t rpls;
+
+                err = ncp_search_for_fileset(server, &seq, &more, &cnt, buf, bufsize, &rpl, &rpls);
+                if (err)                /* Error */
+                        break;
+                if (!cnt)               /* prevent endless loop */
+                        break;
+                while (cnt--) {
+                        size_t onerpl;
+                        
+                        if (rpls < offsetof(struct nw_info_struct, entryName))
+                                break;  /* short packet */
+                        ncp_extract_file_info(rpl, &entry.i);
+                        onerpl = offsetof(struct nw_info_struct, entryName) + entry.i.nameLen;
+                        if (rpls < onerpl)
+                                break;  /* short packet */
+                        (void)ncp_obtain_nfs_info(server, &entry.i);
+                        rpl += onerpl;
+                        rpls -= onerpl;
+                        entry.volume = entry.i.volNumber;
+                        if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry))
+                                break;
+                }
+        } while (more);
+        vfree(buf);
+#endif
+        return;
+}
+
+int ncp_conn_logged_in(struct super_block *sb)
+{
+        struct ncp_server* server = NCP_SBP(sb);
+        int result;
+
+        if (ncp_single_volume(server)) {
+                int len;
+                struct dentry* dent;
+                __u32 volNumber;
+                __le32 dirEntNum;
+                __le32 DosDirNum;
+                __u8 __name[NCP_MAXPATHLEN + 1];
+
+                len = sizeof(__name);
+                result = ncp_io2vol(server, __name, &len, server->m.mounted_vol,
+                                    strlen(server->m.mounted_vol), 1);
+                if (result)
+                        goto out;
+                result = -ENOENT;
+                if (ncp_get_volume_root(server, __name, &volNumber, &dirEntNum, &DosDirNum)) {
+                        PPRINTK("ncp_conn_logged_in: %s not found\n",
+                                server->m.mounted_vol);
+                        goto out;
+                }
+                dent = sb->s_root;
+                if (dent) {
+                        struct inode* ino = dent->d_inode;
+                        if (ino) {
+                                NCP_FINFO(ino)->volNumber = volNumber;
+                                NCP_FINFO(ino)->dirEntNum = dirEntNum;
+                                NCP_FINFO(ino)->DosDirNum = DosDirNum;
+                        } else {
+                                DPRINTK("ncpfs: sb->s_root->d_inode == NULL!\n");
+                        }
+                } else {
+                        DPRINTK("ncpfs: sb->s_root == NULL!\n");
+                }
+        }
+        result = 0;
+
+out:
+        return result;
+}
+
+static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+{
+        struct ncp_server *server = NCP_SERVER(dir);
+        struct inode *inode = NULL;
+        struct ncp_entry_info finfo;
+        int error, res, len;
+        __u8 __name[NCP_MAXPATHLEN + 1];
+
+        lock_kernel();
+        error = -EIO;
+        if (!ncp_conn_valid(server))
+                goto finished;
+
+        PPRINTK("ncp_lookup: server lookup for %s/%s\n",
+                dentry->d_parent->d_name.name, dentry->d_name.name);
+
+        len = sizeof(__name);
+        if (ncp_is_server_root(dir)) {
+                res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
+                                 dentry->d_name.len, 1);
+                if (!res)
+                        res = ncp_lookup_volume(server, __name, &(finfo.i));
+        } else {
+                res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
+                                 dentry->d_name.len, !ncp_preserve_case(dir));
+                if (!res)
+                        res = ncp_obtain_info(server, dir, __name, &(finfo.i));
+        }
+        PPRINTK("ncp_lookup: looked for %s/%s, res=%d\n",
+                dentry->d_parent->d_name.name, __name, res);
+        /*
+         * If we didn't find an entry, make a negative dentry.
+         */
+        if (res)
+                goto add_entry;
+
+        /*
+         * Create an inode for the entry.
+         */
+        finfo.opened = 0;
+        finfo.ino = iunique(dir->i_sb, 2);
+        finfo.volume = finfo.i.volNumber;
+        error = -EACCES;
+        inode = ncp_iget(dir->i_sb, &finfo);
+
+        if (inode) {
+                ncp_new_dentry(dentry);
+add_entry:
+                dentry->d_op = &ncp_dentry_operations;
+                d_add(dentry, inode);
+                error = 0;
+        }
+
+finished:
+        PPRINTK("ncp_lookup: result=%d\n", error);
+        unlock_kernel();
+        return ERR_PTR(error);
+}
+
+/*
+ * This code is common to create, mkdir, and mknod.
+ */
+static int ncp_instantiate(struct inode *dir, struct dentry *dentry,
+                        struct ncp_entry_info *finfo)
+{
+        struct inode *inode;
+        int error = -EINVAL;
+
+        finfo->ino = iunique(dir->i_sb, 2);
+        inode = ncp_iget(dir->i_sb, finfo);
+        if (!inode)
+                goto out_close;
+        d_instantiate(dentry,inode);
+        error = 0;
+out:
+        return error;
+
+out_close:
+        PPRINTK("ncp_instantiate: %s/%s failed, closing file\n",
+                dentry->d_parent->d_name.name, dentry->d_name.name);
+        ncp_close_file(NCP_SERVER(dir), finfo->file_handle);
+        goto out;
+}
+
+int ncp_create_new(struct inode *dir, struct dentry *dentry, int mode,
+                   dev_t rdev, __le32 attributes)
+{
+        struct ncp_server *server = NCP_SERVER(dir);
+        struct ncp_entry_info finfo;
+        int error, result, len;
+        int opmode;
+        __u8 __name[NCP_MAXPATHLEN + 1];
+        
+        PPRINTK("ncp_create_new: creating %s/%s, mode=%x\n",
+                dentry->d_parent->d_name.name, dentry->d_name.name, mode);
+
+        error = -EIO;
+        lock_kernel();
+        if (!ncp_conn_valid(server))
+                goto out;
+
+        ncp_age_dentry(server, dentry);
+        len = sizeof(__name);
+        error = ncp_io2vol(server, __name, &len, dentry->d_name.name,
+                           dentry->d_name.len, !ncp_preserve_case(dir));
+        if (error)
+                goto out;
+
+        error = -EACCES;
+        
+        if (S_ISREG(mode) && 
+            (server->m.flags & NCP_MOUNT_EXTRAS) && 
+            (mode & S_IXUGO))
+                attributes |= aSYSTEM | aSHARED;
+        
+        result = ncp_open_create_file_or_subdir(server, dir, __name,
+                                OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE,
+                                attributes, AR_READ | AR_WRITE, &finfo);
+        opmode = O_RDWR;
+        if (result) {
+                result = ncp_open_create_file_or_subdir(server, dir, __name,
+                                OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE,
+                                attributes, AR_WRITE, &finfo);
+                if (result) {
+                        if (result == 0x87)
+                                error = -ENAMETOOLONG;
+                        DPRINTK("ncp_create: %s/%s failed\n",
+                                dentry->d_parent->d_name.name, dentry->d_name.name);
+                        goto out;
+                }
+                opmode = O_WRONLY;
+        }
+        finfo.access = opmode;
+        if (ncp_is_nfs_extras(server, finfo.volume)) {
+                finfo.i.nfs.mode = mode;
+                finfo.i.nfs.rdev = new_encode_dev(rdev);
+                if (ncp_modify_nfs_info(server, finfo.volume,
+                                        finfo.i.dirEntNum,
+                                        mode, new_encode_dev(rdev)) != 0)
+                        goto out;
+        }
+
+        error = ncp_instantiate(dir, dentry, &finfo);
+out:
+        unlock_kernel();
+        return error;
+}
+
+static int ncp_create(struct inode *dir, struct dentry *dentry, int mode,
+                struct nameidata *nd)
+{
+        return ncp_create_new(dir, dentry, mode, 0, 0);
+}
+
+static int ncp_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+        struct ncp_entry_info finfo;
+        struct ncp_server *server = NCP_SERVER(dir);
+        int error, len;
+        __u8 __name[NCP_MAXPATHLEN + 1];
+
+        DPRINTK("ncp_mkdir: making %s/%s\n",
+                dentry->d_parent->d_name.name, dentry->d_name.name);
+
+        error = -EIO;
+        lock_kernel();
+        if (!ncp_conn_valid(server))
+                goto out;
+
+        ncp_age_dentry(server, dentry);
+        len = sizeof(__name);
+        error = ncp_io2vol(server, __name, &len, dentry->d_name.name,
+                           dentry->d_name.len, !ncp_preserve_case(dir));
+        if (error)
+                goto out;
+
+        error = -EACCES;
+        if (ncp_open_create_file_or_subdir(server, dir, __name,
+                                           OC_MODE_CREATE, aDIR,
+                                           cpu_to_le16(0xffff),
+                                           &finfo) == 0)
+        {
+                if (ncp_is_nfs_extras(server, finfo.volume)) {
+                        mode |= S_IFDIR;
+                        finfo.i.nfs.mode = mode;
+                        if (ncp_modify_nfs_info(server,
+                                                finfo.volume,
+                                                finfo.i.dirEntNum,
+                                                mode, 0) != 0)
+                                goto out;
+                }
+                error = ncp_instantiate(dir, dentry, &finfo);
+        }
+out:
+        unlock_kernel();
+        return error;
+}
+
+static int ncp_rmdir(struct inode *dir, struct dentry *dentry)
+{
+        struct ncp_server *server = NCP_SERVER(dir);
+        int error, result, len;
+        __u8 __name[NCP_MAXPATHLEN + 1];
+
+        DPRINTK("ncp_rmdir: removing %s/%s\n",
+                dentry->d_parent->d_name.name, dentry->d_name.name);
+
+        error = -EIO;
+        lock_kernel();
+        if (!ncp_conn_valid(server))
+                goto out;
+
+        error = -EBUSY;
+        if (!d_unhashed(dentry))
+                goto out;
+
+        len = sizeof(__name);
+        error = ncp_io2vol(server, __name, &len, dentry->d_name.name,
+                           dentry->d_name.len, !ncp_preserve_case(dir));
+        if (error)
+                goto out;
+
+        result = ncp_del_file_or_subdir(server, dir, __name);
+        switch (result) {
+                case 0x00:
+                        error = 0;
+                        break;
+                case 0x85:      /* unauthorized to delete file */
+                case 0x8A:      /* unauthorized to delete file */
+                        error = -EACCES;
+                        break;
+                case 0x8F:
+                case 0x90:      /* read only */
+                        error = -EPERM;
+                        break;
+                case 0x9F:      /* in use by another client */
+                        error = -EBUSY;
+                        break;
+                case 0xA0:      /* directory not empty */
+                        error = -ENOTEMPTY;
+                        break;
+                case 0xFF:      /* someone deleted file */
+                        error = -ENOENT;
+                        break;
+                default:
+                        error = -EACCES;
+                        break;
+        }
+out:
+        unlock_kernel();
+        return error;
+}
+
+static int ncp_unlink(struct inode *dir, struct dentry *dentry)
+{
+        struct inode *inode = dentry->d_inode;
+        struct ncp_server *server;
+        int error;
+
+        lock_kernel();
+        server = NCP_SERVER(dir);
+        DPRINTK("ncp_unlink: unlinking %s/%s\n",
+                dentry->d_parent->d_name.name, dentry->d_name.name);
+        
+        error = -EIO;
+        if (!ncp_conn_valid(server))
+                goto out;
+
+        /*
+         * Check whether to close the file ...
+         */
+        if (inode) {
+                PPRINTK("ncp_unlink: closing file\n");
+                ncp_make_closed(inode);
+        }
+
+        error = ncp_del_file_or_subdir2(server, dentry);
+#ifdef CONFIG_NCPFS_STRONG
+        /* 9C is Invalid path.. It should be 8F, 90 - read only, but
+           it is not :-( */
+        if ((error == 0x9C || error == 0x90) && server->m.flags & NCP_MOUNT_STRONG) { /* R/O */
+                error = ncp_force_unlink(dir, dentry);
+        }
+#endif
+        switch (error) {
+                case 0x00:
+                        DPRINTK("ncp: removed %s/%s\n",
+                                dentry->d_parent->d_name.name, dentry->d_name.name);
+                        break;
+                case 0x85:
+                case 0x8A:
+                        error = -EACCES;
+                        break;
+                case 0x8D:      /* some files in use */
+                case 0x8E:      /* all files in use */
+                        error = -EBUSY;
+                        break;
+                case 0x8F:      /* some read only */
+                case 0x90:      /* all read only */
+                case 0x9C:      /* !!! returned when in-use or read-only by NW4 */
+                        error = -EPERM;
+                        break;
+                case 0xFF:
+                        error = -ENOENT;
+                        break;
+                default:
+                        error = -EACCES;
+                        break;
+        }
+                
+out:
+        unlock_kernel();
+        return error;
+}
+
+static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry,
+                      struct inode *new_dir, struct dentry *new_dentry)
+{
+        struct ncp_server *server = NCP_SERVER(old_dir);
+        int error;
+        int old_len, new_len;
+        __u8 __old_name[NCP_MAXPATHLEN + 1], __new_name[NCP_MAXPATHLEN + 1];
+
+        DPRINTK("ncp_rename: %s/%s to %s/%s\n",
+                old_dentry->d_parent->d_name.name, old_dentry->d_name.name,
+                new_dentry->d_parent->d_name.name, new_dentry->d_name.name);
+
+        error = -EIO;
+        lock_kernel();
+        if (!ncp_conn_valid(server))
+                goto out;
+
+        ncp_age_dentry(server, old_dentry);
+        ncp_age_dentry(server, new_dentry);
+
+        old_len = sizeof(__old_name);
+        error = ncp_io2vol(server, __old_name, &old_len,
+                           old_dentry->d_name.name, old_dentry->d_name.len,
+                           !ncp_preserve_case(old_dir));
+        if (error)
+                goto out;
+
+        new_len = sizeof(__new_name);
+        error = ncp_io2vol(server, __new_name, &new_len,
+                           new_dentry->d_name.name, new_dentry->d_name.len,
+                           !ncp_preserve_case(new_dir));
+        if (error)
+                goto out;
+
+        error = ncp_ren_or_mov_file_or_subdir(server, old_dir, __old_name,
+                                                      new_dir, __new_name);
+#ifdef CONFIG_NCPFS_STRONG
+        if ((error == 0x90 || error == 0x8B || error == -EACCES) &&
+                        server->m.flags & NCP_MOUNT_STRONG) {   /* RO */
+                error = ncp_force_rename(old_dir, old_dentry, __old_name,
+                                         new_dir, new_dentry, __new_name);
+        }
+#endif
+        switch (error) {
+                case 0x00:
+                        DPRINTK("ncp renamed %s -> %s.\n",
+                                old_dentry->d_name.name,new_dentry->d_name.name);
+                        break;
+                case 0x9E:
+                        error = -ENAMETOOLONG;
+                        break;
+                case 0xFF:
+                        error = -ENOENT;
+                        break;
+                default:
+                        error = -EACCES;
+                        break;
+        }
+out:
+        unlock_kernel();
+        return error;
+}
+
+static int ncp_mknod(struct inode * dir, struct dentry *dentry,
+                     int mode, dev_t rdev)
+{
+        if (!new_valid_dev(rdev))
+                return -EINVAL;
+        if (ncp_is_nfs_extras(NCP_SERVER(dir), NCP_FINFO(dir)->volNumber)) {
+                DPRINTK(KERN_DEBUG "ncp_mknod: mode = 0%o\n", mode);
+                return ncp_create_new(dir, dentry, mode, rdev, 0);
+        }
+        return -EPERM; /* Strange, but true */
+}
+
+/* The following routines are taken directly from msdos-fs */
+
+/* Linear day numbers of the respective 1sts in non-leap years. */
+
+static int day_n[] =
+{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0};
+/* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */
+
+
+extern struct timezone sys_tz;
+
+static int utc2local(int time)
+{
+        return time - sys_tz.tz_minuteswest * 60;
+}
+
+static int local2utc(int time)
+{
+        return time + sys_tz.tz_minuteswest * 60;
+}
+
+/* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
+int
+ncp_date_dos2unix(__le16 t, __le16 d)
+{
+        unsigned short time = le16_to_cpu(t), date = le16_to_cpu(d);
+        int month, year, secs;
+
+        /* first subtract and mask after that... Otherwise, if
+           date == 0, bad things happen */
+        month = ((date >> 5) - 1) & 15;
+        year = date >> 9;
+        secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 +
+                86400 * ((date & 31) - 1 + day_n[month] + (year / 4) + 
+                year * 365 - ((year & 3) == 0 && month < 2 ? 1 : 0) + 3653);
+        /* days since 1.1.70 plus 80's leap day */
+        return local2utc(secs);
+}
+
+
+/* Convert linear UNIX date to a MS-DOS time/date pair. */
+void
+ncp_date_unix2dos(int unix_date, __le16 *time, __le16 *date)
+{
+        int day, year, nl_day, month;
+
+        unix_date = utc2local(unix_date);
+        *time = cpu_to_le16(
+                (unix_date % 60) / 2 + (((unix_date / 60) % 60) << 5) +
+                (((unix_date / 3600) % 24) << 11));
+        day = unix_date / 86400 - 3652;
+        year = day / 365;
+        if ((year + 3) / 4 + 365 * year > day)
+                year--;
+        day -= (year + 3) / 4 + 365 * year;
+        if (day == 59 && !(year & 3)) {
+                nl_day = day;
+                month = 2;
+        } else {
+                nl_day = (year & 3) || day <= 59 ? day : day - 1;
+                for (month = 0; month < 12; month++)
+                        if (day_n[month] > nl_day)
+                                break;
+        }
+        *date = cpu_to_le16(nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9));
+}