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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /fs/ncpfs/dir.c
Initial import
Diffstat (limited to 'fs/ncpfs/dir.c')
-rw-r--r--fs/ncpfs/dir.c1237
1 files changed, 1237 insertions, 0 deletions
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
new file mode 100644
index 000000000..80021c709
--- /dev/null
+++ b/fs/ncpfs/dir.c
@@ -0,0 +1,1237 @@
+/*
+ * 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/vmalloc.h>
+#include <linux/mm.h>
+#include <linux/namei.h>
+#include <asm/uaccess.h>
+#include <asm/byteorder.h>
+
+#include "ncp_fs.h"
+
+static void ncp_read_volume_list(struct file *, struct dir_context *,
+ struct ncp_cache_control *);
+static void ncp_do_readdir(struct file *, struct dir_context *,
+ struct ncp_cache_control *);
+
+static int ncp_readdir(struct file *, struct dir_context *);
+
+static int ncp_create(struct inode *, struct dentry *, umode_t, bool);
+static struct dentry *ncp_lookup(struct inode *, struct dentry *, unsigned int);
+static int ncp_unlink(struct inode *, struct dentry *);
+static int ncp_mkdir(struct inode *, struct dentry *, umode_t);
+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,
+ umode_t 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 =
+{
+ .llseek = generic_file_llseek,
+ .read = generic_read_dir,
+ .iterate = ncp_readdir,
+ .unlocked_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 *, unsigned int);
+static int ncp_hash_dentry(const struct dentry *, struct qstr *);
+static int ncp_compare_dentry(const struct dentry *, const struct dentry *,
+ unsigned int, const char *, const struct qstr *);
+static int ncp_delete_dentry(const struct dentry *);
+static void ncp_d_prune(struct dentry *dentry);
+
+const 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,
+ .d_prune = ncp_d_prune,
+};
+
+#define ncp_namespace(i) (NCP_SERVER(i)->name_space[NCP_FINFO(i)->volNumber])
+
+static inline int ncp_preserve_entry_case(struct inode *i, __u32 nscreator)
+{
+#ifdef CONFIG_NCPFS_SMALLDOS
+ int ns = ncp_namespace(i);
+
+ if ((ns == NW_NS_DOS)
+#ifdef CONFIG_NCPFS_OS2_NS
+ || ((ns == NW_NS_OS2) && (nscreator == NW_NS_DOS))
+#endif /* CONFIG_NCPFS_OS2_NS */
+ )
+ return 0;
+#endif /* CONFIG_NCPFS_SMALLDOS */
+ return 1;
+}
+
+#define ncp_preserve_case(i) (ncp_namespace(i) != NW_NS_DOS)
+
+static inline int ncp_case_sensitive(const struct inode *i)
+{
+#ifdef CONFIG_NCPFS_NFS_NS
+ return ncp_namespace(i) == NW_NS_NFS;
+#else
+ return 0;
+#endif /* CONFIG_NCPFS_NFS_NS */
+}
+
+/*
+ * Note: leave the hash unchanged if the directory
+ * is case-sensitive.
+ *
+ * Accessing the parent inode can be racy under RCU pathwalking.
+ * Use ACCESS_ONCE() to make sure we use _one_ particular inode,
+ * the callers will handle races.
+ */
+static int
+ncp_hash_dentry(const struct dentry *dentry, struct qstr *this)
+{
+ struct inode *inode = d_inode_rcu(dentry);
+
+ if (!inode)
+ return 0;
+
+ if (!ncp_case_sensitive(inode)) {
+ struct super_block *sb = dentry->d_sb;
+ struct nls_table *t;
+ unsigned long hash;
+ int i;
+
+ t = NCP_IO_TABLE(sb);
+ 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;
+}
+
+/*
+ * Accessing the parent inode can be racy under RCU pathwalking.
+ * Use ACCESS_ONCE() to make sure we use _one_ particular inode,
+ * the callers will handle races.
+ */
+static int
+ncp_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name)
+{
+ struct inode *pinode;
+
+ if (len != name->len)
+ return 1;
+
+ pinode = d_inode_rcu(parent);
+ if (!pinode)
+ return 1;
+
+ if (ncp_case_sensitive(pinode))
+ return strncmp(str, name->name, len);
+
+ return ncp_strnicmp(NCP_IO_TABLE(pinode->i_sb), str, name->name, 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(const struct dentry * dentry)
+{
+ struct inode *inode = d_inode(dentry);
+
+ 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)) &&
+ is_root_inode(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 = d_inode(dentry);
+
+ 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 = d_inode(old_dentry);
+ __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 && d_really_is_positive(new_dentry)) {
+ new_nwattr = NCP_FINFO(d_inode(new_dentry))->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, unsigned int flags)
+{
+ 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];
+
+ if (dentry == dentry->d_sb->s_root)
+ return 1;
+
+ if (flags & LOOKUP_RCU)
+ return -ECHILD;
+
+ parent = dget_parent(dentry);
+ dir = d_inode(parent);
+
+ if (d_really_is_negative(dentry))
+ goto finished;
+
+ server = NCP_SERVER(dir);
+
+ /*
+ * 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;
+
+ ncp_dbg(2, "%pd2 not valid, age=%ld, server lookup\n",
+ dentry, 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));
+ if (!res)
+ ncp_update_known_namespace(server, finfo.i.volNumber, NULL);
+ }
+ } 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;
+ ncp_dbg(2, "looked for %pd/%s, res=%d\n",
+ dentry->d_parent, __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) {
+ struct inode *inode = d_inode(dentry);
+
+ mutex_lock(&inode->i_mutex);
+ if (finfo.i.dirEntNum == NCP_FINFO(inode)->dirEntNum) {
+ ncp_new_dentry(dentry);
+ val=1;
+ } else
+ ncp_dbg(2, "found, but dirEntNum changed\n");
+
+ ncp_update_inode2(inode, &finfo);
+ mutex_unlock(&inode->i_mutex);
+ }
+
+finished:
+ ncp_dbg(2, "result=%d\n", val);
+ dput(parent);
+ return val;
+}
+
+static time_t ncp_obtain_mtime(struct dentry *dentry)
+{
+ struct inode *inode = d_inode(dentry);
+ 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 inline void
+ncp_invalidate_dircache_entries(struct dentry *parent)
+{
+ struct ncp_server *server = NCP_SERVER(d_inode(parent));
+ struct dentry *dentry;
+
+ spin_lock(&parent->d_lock);
+ list_for_each_entry(dentry, &parent->d_subdirs, d_child) {
+ dentry->d_fsdata = NULL;
+ ncp_age_dentry(server, dentry);
+ }
+ spin_unlock(&parent->d_lock);
+}
+
+static int ncp_readdir(struct file *file, struct dir_context *ctx)
+{
+ struct dentry *dentry = file->f_path.dentry;
+ struct inode *inode = d_inode(dentry);
+ 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;
+
+ ncp_dbg(2, "reading %pD2, pos=%d\n", file, (int)ctx->pos);
+
+ result = -EIO;
+ /* Do not generate '.' and '..' when server is dead. */
+ if (!ncp_conn_valid(server))
+ goto out;
+
+ result = 0;
+ if (!dir_emit_dots(file, ctx))
+ goto out;
+
+ 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 (ctx->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 (ctx->pos > ctl.head.end)
+ goto finished;
+
+ ctl.fpos = ctx->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;
+ bool over;
+
+ spin_lock(&dentry->d_lock);
+ if (!(NCP_FINFO(inode)->flags & NCPI_DIR_CACHE)) {
+ spin_unlock(&dentry->d_lock);
+ goto invalid_cache;
+ }
+ dent = ctl.cache->dentry[ctl.idx];
+ if (unlikely(!lockref_get_not_dead(&dent->d_lockref))) {
+ spin_unlock(&dentry->d_lock);
+ goto invalid_cache;
+ }
+ spin_unlock(&dentry->d_lock);
+ if (d_really_is_negative(dent)) {
+ dput(dent);
+ goto invalid_cache;
+ }
+ over = !dir_emit(ctx, dent->d_name.name,
+ dent->d_name.len,
+ d_inode(dent)->i_ino, DT_UNKNOWN);
+ dput(dent);
+ if (over)
+ goto finished;
+ ctx->pos += 1;
+ ctl.idx += 1;
+ if (ctx->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:
+ spin_lock(&dentry->d_lock);
+ NCP_FINFO(inode)->flags |= NCPI_DIR_CACHE;
+ spin_unlock(&dentry->d_lock);
+ if (ncp_is_server_root(inode)) {
+ ncp_read_volume_list(file, ctx, &ctl);
+ } else {
+ ncp_do_readdir(file, ctx, &ctl);
+ }
+ ctl.head.end = ctl.fpos - 1;
+ ctl.head.eof = ctl.valid;
+finished:
+ if (ctl.page) {
+ kunmap(ctl.page);
+ SetPageUptodate(ctl.page);
+ unlock_page(ctl.page);
+ page_cache_release(ctl.page);
+ }
+ if (page) {
+ cache->head = ctl.head;
+ kunmap(page);
+ SetPageUptodate(page);
+ unlock_page(page);
+ page_cache_release(page);
+ }
+out:
+ return result;
+}
+
+static void ncp_d_prune(struct dentry *dentry)
+{
+ if (!dentry->d_fsdata) /* not referenced from page cache */
+ return;
+ NCP_FINFO(d_inode(dentry->d_parent))->flags &= ~NCPI_DIR_CACHE;
+}
+
+static int
+ncp_fill_cache(struct file *file, struct dir_context *ctx,
+ struct ncp_cache_control *ctrl, struct ncp_entry_info *entry,
+ int inval_childs)
+{
+ struct dentry *newdent, *dentry = file->f_path.dentry;
+ struct inode *dir = d_inode(dentry);
+ 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(dir), __name, &qname.len,
+ entry->i.entryName, entry->i.nameLen,
+ !ncp_preserve_entry_case(dir, entry->i.NSCreator)))
+ return 1; /* I'm not sure */
+
+ qname.name = __name;
+
+ newdent = d_hash_and_lookup(dentry, &qname);
+ if (unlikely(IS_ERR(newdent)))
+ goto end_advance;
+ if (!newdent) {
+ newdent = d_alloc(dentry, &qname);
+ if (!newdent)
+ goto end_advance;
+ } else {
+ hashed = 1;
+
+ /* If case sensitivity changed for this volume, all entries below this one
+ should be thrown away. This entry itself is not affected, as its case
+ sensitivity is controlled by its own parent. */
+ if (inval_childs)
+ shrink_dcache_parent(newdent);
+
+ /*
+ * NetWare's OS2 namespace is case preserving yet case
+ * insensitive. So we update dentry's name as received from
+ * server. Parent dir's i_mutex is locked because we're in
+ * readdir.
+ */
+ dentry_update_name_case(newdent, &qname);
+ }
+
+ if (d_really_is_negative(newdent)) {
+ struct inode *inode;
+
+ entry->opened = 0;
+ entry->ino = iunique(dir->i_sb, 2);
+ inode = ncp_iget(dir->i_sb, entry);
+ if (inode) {
+ d_instantiate(newdent, inode);
+ if (!hashed)
+ d_rehash(newdent);
+ } else {
+ spin_lock(&dentry->d_lock);
+ NCP_FINFO(inode)->flags &= ~NCPI_DIR_CACHE;
+ spin_unlock(&dentry->d_lock);
+ }
+ } else {
+ struct inode *inode = d_inode(newdent);
+
+ mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD);
+ ncp_update_inode2(inode, entry);
+ mutex_unlock(&inode->i_mutex);
+ }
+
+ 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(&dir->i_data, ctl.ofs);
+ if (ctl.page)
+ ctl.cache = kmap(ctl.page);
+ }
+ if (ctl.cache) {
+ if (d_really_is_positive(newdent)) {
+ newdent->d_fsdata = newdent;
+ ctl.cache->dentry[ctl.idx] = newdent;
+ ino = d_inode(newdent)->i_ino;
+ ncp_new_dentry(newdent);
+ }
+ valid = 1;
+ }
+ dput(newdent);
+end_advance:
+ if (!valid)
+ ctl.valid = 0;
+ if (!ctl.filled && (ctl.fpos == ctx->pos)) {
+ if (!ino)
+ ino = iunique(dir->i_sb, 2);
+ ctl.filled = !dir_emit(ctx, qname.name, qname.len,
+ ino, DT_UNKNOWN);
+ if (!ctl.filled)
+ ctx->pos += 1;
+ }
+ ctl.fpos += 1;
+ ctl.idx += 1;
+ *ctrl = ctl;
+ return (ctl.valid || !ctl.filled);
+}
+
+static void
+ncp_read_volume_list(struct file *file, struct dir_context *ctx,
+ struct ncp_cache_control *ctl)
+{
+ struct inode *inode = file_inode(file);
+ struct ncp_server *server = NCP_SERVER(inode);
+ struct ncp_volume_info info;
+ struct ncp_entry_info entry;
+ int i;
+
+ ncp_dbg(1, "pos=%ld\n", (unsigned long)ctx->pos);
+
+ for (i = 0; i < NCP_NUMBER_OF_VOLUMES; i++) {
+ int inval_dentry;
+
+ if (ncp_get_volume_info_with_number(server, i, &info) != 0)
+ return;
+ if (!strlen(info.volume_name))
+ continue;
+
+ ncp_dbg(1, "found vol: %s\n", info.volume_name);
+
+ if (ncp_lookup_volume(server, info.volume_name,
+ &entry.i)) {
+ ncp_dbg(1, "could not lookup vol %s\n",
+ info.volume_name);
+ continue;
+ }
+ inval_dentry = ncp_update_known_namespace(server, entry.i.volNumber, NULL);
+ entry.volume = entry.i.volNumber;
+ if (!ncp_fill_cache(file, ctx, ctl, &entry, inval_dentry))
+ return;
+ }
+}
+
+static void
+ncp_do_readdir(struct file *file, struct dir_context *ctx,
+ struct ncp_cache_control *ctl)
+{
+ struct inode *dir = file_inode(file);
+ 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;
+
+ ncp_dbg(1, "%pD2, fpos=%ld\n", file, (unsigned long)ctx->pos);
+ ncp_vdbg("init %pD, volnum=%d, dirent=%u\n",
+ file, NCP_FINFO(dir)->volNumber, NCP_FINFO(dir)->dirEntNum);
+
+ err = ncp_initialize_search(server, dir, &seq);
+ if (err) {
+ ncp_dbg(1, "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(file, ctx, ctl, &entry, 0))
+ 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)) {
+ ncp_vdbg("%s not found\n", server->m.mounted_vol);
+ goto out;
+ }
+ dent = sb->s_root;
+ if (dent) {
+ struct inode* ino = d_inode(dent);
+ if (ino) {
+ ncp_update_known_namespace(server, volNumber, NULL);
+ NCP_FINFO(ino)->volNumber = volNumber;
+ NCP_FINFO(ino)->dirEntNum = dirEntNum;
+ NCP_FINFO(ino)->DosDirNum = DosDirNum;
+ result = 0;
+ } else {
+ ncp_dbg(1, "d_inode(sb->s_root) == NULL!\n");
+ }
+ } else {
+ ncp_dbg(1, "sb->s_root == NULL!\n");
+ }
+ } else
+ result = 0;
+
+out:
+ return result;
+}
+
+static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+{
+ 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];
+
+ error = -EIO;
+ if (!ncp_conn_valid(server))
+ goto finished;
+
+ ncp_vdbg("server lookup for %pd2\n", 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));
+ if (!res)
+ ncp_update_known_namespace(server, finfo.i.volNumber, NULL);
+ } 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));
+ }
+ ncp_vdbg("looked for %pd2, res=%d\n", dentry, 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:
+ d_add(dentry, inode);
+ error = 0;
+ }
+
+finished:
+ ncp_vdbg("result=%d\n", 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:
+ ncp_vdbg("%pd2 failed, closing file\n", dentry);
+ ncp_close_file(NCP_SERVER(dir), finfo->file_handle);
+ goto out;
+}
+
+int ncp_create_new(struct inode *dir, struct dentry *dentry, umode_t 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];
+
+ ncp_vdbg("creating %pd2, mode=%hx\n", dentry, mode);
+
+ 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;
+ else if (result < 0)
+ error = result;
+ ncp_dbg(1, "%pd2 failed\n", dentry);
+ 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:
+ return error;
+}
+
+static int ncp_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool excl)
+{
+ return ncp_create_new(dir, dentry, mode, 0, 0);
+}
+
+static int ncp_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct ncp_entry_info finfo;
+ struct ncp_server *server = NCP_SERVER(dir);
+ int error, len;
+ __u8 __name[NCP_MAXPATHLEN + 1];
+
+ ncp_dbg(1, "making %pd2\n", dentry);
+
+ 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 = ncp_open_create_file_or_subdir(server, dir, __name,
+ OC_MODE_CREATE, aDIR,
+ cpu_to_le16(0xffff),
+ &finfo);
+ if (error == 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);
+ } else if (error > 0) {
+ error = -EACCES;
+ }
+out:
+ 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];
+
+ ncp_dbg(1, "removing %pd2\n", 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;
+
+ 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 = result < 0 ? result : -EACCES;
+ break;
+ }
+out:
+ return error;
+}
+
+static int ncp_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct inode *inode = d_inode(dentry);
+ struct ncp_server *server;
+ int error;
+
+ server = NCP_SERVER(dir);
+ ncp_dbg(1, "unlinking %pd2\n", dentry);
+
+ /*
+ * Check whether to close the file ...
+ */
+ if (inode) {
+ ncp_vdbg("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:
+ ncp_dbg(1, "removed %pd2\n", dentry);
+ 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 = error < 0 ? error : -EACCES;
+ break;
+ }
+ 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];
+
+ ncp_dbg(1, "%pd2 to %pd2\n", old_dentry, new_dentry);
+
+ 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:
+ ncp_dbg(1, "renamed %pd -> %pd\n",
+ old_dentry, new_dentry);
+ break;
+ case 0x9E:
+ error = -ENAMETOOLONG;
+ break;
+ case 0xFF:
+ error = -ENOENT;
+ break;
+ default:
+ error = error < 0 ? error : -EACCES;
+ break;
+ }
+out:
+ return error;
+}
+
+static int ncp_mknod(struct inode * dir, struct dentry *dentry,
+ umode_t mode, dev_t rdev)
+{
+ if (!new_valid_dev(rdev))
+ return -EINVAL;
+ if (ncp_is_nfs_extras(NCP_SERVER(dir), NCP_FINFO(dir)->volNumber)) {
+ ncp_dbg(1, "mode = 0%ho\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 */
+
+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 = 1; 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));
+}