/* * 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/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 const struct file_operations ncp_dir_operations = { .read = generic_read_dir, .readdir = ncp_readdir, .ioctl = ncp_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = ncp_compat_ioctl, #endif }; const 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_u.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_path.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_path.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_path.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_path.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; } /* 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); 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)); }