dir.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:28k
- /*
- * 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
- *
- */
- #include <linux/config.h>
- #include <linux/sched.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/locks.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);
- static struct dentry *ncp_lookup(struct inode *, struct dentry *);
- 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 *);
- #ifdef CONFIG_NCPFS_EXTRAS
- extern int ncp_symlink(struct inode *, struct dentry *, const char *);
- #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,
- #ifdef CONFIG_NCPFS_EXTRAS
- symlink: ncp_symlink,
- #endif
- mkdir: ncp_mkdir,
- rmdir: ncp_rmdir,
- rename: ncp_rename,
- setattr: ncp_notify_change,
- };
- /*
- * Dentry operations routines
- */
- static int ncp_lookup_validate(struct dentry *, int);
- 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] != ' ');
- }
- 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;
- __u32 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;
- __u32 old_nwattr = NCP_FINFO(old_inode)->nwattr;
- __u32 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, int flags)
- {
- struct ncp_server *server;
- struct inode *dir = dentry->d_parent->d_inode;
- struct ncp_entry_info finfo;
- int res, val = 0, len = dentry->d_name.len + 1;
- __u8 __name[len];
- if (!dentry->d_inode || !dir)
- 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 lookupn",
- dentry->d_parent->d_name.name, dentry->d_name.name,
- NCP_GET_AGE(dentry));
- if (ncp_is_server_root(dir)) {
- res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
- len-1, 1);
- if (!res)
- res = ncp_lookup_volume(server, __name, &(finfo.i));
- } else {
- res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
- len-1, !ncp_preserve_case(dir));
- if (!res)
- res = ncp_obtain_info(server, dir, __name, &(finfo.i));
- }
- DDPRINTK("ncp_lookup_validate: looked for %s/%s, res=%dn",
- 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 changedn");
- ncp_update_inode2(dentry->d_inode, &finfo);
- }
- finished:
- DDPRINTK("ncp_lookup_validate: result=%dn", val);
- return val;
- }
- static int
- ncp_lookup_validate(struct dentry * dentry, int flags)
- {
- int res;
- lock_kernel();
- res = __ncp_lookup_validate(dentry, flags);
- 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(le16_to_cpu(i.modifyTime),
- le16_to_cpu(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;
- ctl.page = NULL;
- ctl.cache = NULL;
- DDPRINTK("ncp_readdir: reading %s/%s, pos=%dn",
- 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,
- dentry->d_parent->d_inode->i_ino, 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 (!Page_Uptodate(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 (!Page_Uptodate(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);
- UnlockPage(ctl.page);
- page_cache_release(ctl.page);
- ctl.page = NULL;
- }
- ctl.idx = 0;
- ctl.ofs += 1;
- }
- invalid_cache:
- if (ctl.page) {
- kunmap(ctl.page);
- UnlockPage(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);
- UnlockPage(page);
- page_cache_release(page);
- }
- if (ctl.page) {
- kunmap(ctl.page);
- SetPageUptodate(ctl.page);
- UnlockPage(ctl.page);
- page_cache_release(ctl.page);
- }
- out:
- 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[256];
- qname.len = 256;
- 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);
- UnlockPage(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=%ldn",
- (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: %sn",
- info.volume_name);
- if (ncp_lookup_volume(server, info.volume_name,
- &entry.i)) {
- DPRINTK("ncpfs: could not lookup vol %sn",
- info.volume_name);
- continue;
- }
- 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;
- DPRINTK("ncp_do_readdir: %s/%s, fpos=%ldn",
- dentry->d_parent->d_name.name, dentry->d_name.name,
- (unsigned long) filp->f_pos);
- PPRINTK("ncp_do_readdir: init %s, volnum=%d, dirent=%un",
- 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=%dn", err);
- return;
- }
- for (;;) {
- err = ncp_search_for_file_or_subdir(server, &seq, &entry.i);
- if (err) {
- DPRINTK("ncp_do_readdir: search failed, err=%dn", err);
- return;
- }
- if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry))
- return;
- }
- }
- int ncp_conn_logged_in(struct super_block *sb)
- {
- struct ncp_server* server = NCP_SBP(sb);
- struct nw_info_struct i;
- int result, len = strlen(server->m.mounted_vol) + 1;
- __u8 __name[len];
- if (ncp_single_volume(server)) {
- struct dentry* dent;
- result = -ENOENT;
- if (ncp_io2vol(server, __name, &len, server->m.mounted_vol,
- len-1, 1))
- goto out;
- if (ncp_lookup_volume(server, __name, &i)) {
- PPRINTK("ncp_conn_logged_in: %s not foundn",
- server->m.mounted_vol);
- goto out;
- }
- dent = sb->s_root;
- if (dent) {
- struct inode* ino = dent->d_inode;
- if (ino) {
- NCP_FINFO(ino)->volNumber = i.volNumber;
- NCP_FINFO(ino)->dirEntNum = i.dirEntNum;
- NCP_FINFO(ino)->DosDirNum = i.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 ncp_server *server = NCP_SERVER(dir);
- struct inode *inode = NULL;
- struct ncp_entry_info finfo;
- int error, res, len = dentry->d_name.len + 1;
- __u8 __name[len];
- error = -EIO;
- if (!ncp_conn_valid(server))
- goto finished;
- PPRINTK("ncp_lookup: server lookup for %s/%sn",
- dentry->d_parent->d_name.name, dentry->d_name.name);
- if (ncp_is_server_root(dir)) {
- res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
- len-1, 1);
- if (!res)
- res = ncp_lookup_volume(server, __name, &(finfo.i));
- } else {
- res = ncp_io2vol(server, __name, &len, dentry->d_name.name,
- len-1, !ncp_preserve_case(dir));
- if (!res)
- res = ncp_obtain_info(server, dir, __name, &(finfo.i));
- }
- PPRINTK("ncp_lookup: looked for %s/%s, res=%dn",
- 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);
- 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=%dn", error);
- 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 filen",
- 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,
- int attributes)
- {
- struct ncp_server *server = NCP_SERVER(dir);
- struct ncp_entry_info finfo;
- int error, result, len = dentry->d_name.len + 1;
- int opmode;
- __u8 __name[len];
-
- PPRINTK("ncp_create_new: creating %s/%s, mode=%xn",
- dentry->d_parent->d_name.name, dentry->d_name.name, mode);
- error = -EIO;
- if (!ncp_conn_valid(server))
- goto out;
- ncp_age_dentry(server, dentry);
- error = ncp_io2vol(server, __name, &len, dentry->d_name.name,
- len-1, !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 failedn",
- dentry->d_parent->d_name.name, dentry->d_name.name);
- goto out;
- }
- opmode = O_WRONLY;
- }
- finfo.access = opmode;
- error = ncp_instantiate(dir, dentry, &finfo);
- out:
- return error;
- }
- static int ncp_create(struct inode *dir, struct dentry *dentry, int mode)
- {
- return ncp_create_new(dir, dentry, mode, 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 = dentry->d_name.len + 1;
- __u8 __name[len];
- DPRINTK("ncp_mkdir: making %s/%sn",
- dentry->d_parent->d_name.name, dentry->d_name.name);
- error = -EIO;
- if (!ncp_conn_valid(server))
- goto out;
- ncp_age_dentry(server, dentry);
- error = ncp_io2vol(server, __name, &len, dentry->d_name.name,
- len-1, !ncp_preserve_case(dir));
- if (error)
- goto out;
- error = -EACCES;
- if (ncp_open_create_file_or_subdir(server, dir, __name,
- OC_MODE_CREATE, aDIR, 0xffff,
- &finfo) == 0)
- {
- error = ncp_instantiate(dir, dentry, &finfo);
- }
- out:
- return error;
- }
- static int ncp_rmdir(struct inode *dir, struct dentry *dentry)
- {
- struct ncp_server *server = NCP_SERVER(dir);
- int error, result, len = dentry->d_name.len + 1;
- __u8 __name[len];
- DPRINTK("ncp_rmdir: removing %s/%sn",
- dentry->d_parent->d_name.name, dentry->d_name.name);
- error = -EIO;
- if (!ncp_conn_valid(server))
- goto out;
- error = -EBUSY;
- if (!d_unhashed(dentry))
- goto out;
- error = ncp_io2vol(server, __name, &len, dentry->d_name.name,
- len-1, !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:
- return error;
- }
- static int ncp_unlink(struct inode *dir, struct dentry *dentry)
- {
- struct inode *inode = dentry->d_inode;
- struct ncp_server *server = NCP_SERVER(dir);
- int error;
- DPRINTK("ncp_unlink: unlinking %s/%sn",
- 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 filen");
- 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/%sn",
- 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:
- 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 = old_dentry->d_name.len + 1;
- int new_len = new_dentry->d_name.len + 1;
- __u8 __old_name[old_len], __new_name[new_len];
- DPRINTK("ncp_rename: %s/%s to %s/%sn",
- 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;
- if (!ncp_conn_valid(server))
- goto out;
- ncp_age_dentry(server, old_dentry);
- ncp_age_dentry(server, new_dentry);
- error = ncp_io2vol(server, __old_name, &old_len,
- old_dentry->d_name.name, old_len-1,
- !ncp_preserve_case(old_dir));
- if (error)
- goto out;
- error = ncp_io2vol(server, __new_name, &new_len,
- new_dentry->d_name.name, new_len-1,
- !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:
- return error;
- }
- /* 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(unsigned short time, unsigned short date)
- {
- 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, unsigned short *time, unsigned short *date)
- {
- int day, year, nl_day, month;
- unix_date = utc2local(unix_date);
- *time = (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 = nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9);
- }