VFS initialisation and support functions
Copyright (C) Tim Potter 1999
Copyright (C) Alexander Bokovoy 2002
+ Copyright (C) James Peach 2006
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
This work was sponsored by Optifacio Software Services, Inc.
*/
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_VFS
-struct vfs_init_function_entry {
- char *name;
- vfs_op_tuple *ops, *(*init)(const struct vfs_ops *, struct smb_vfs_handle_struct *);
- struct vfs_init_function_entry *prev, *next;
-};
-
-static struct vfs_init_function_entry *backends = NULL;
-
-/* Some structures to help us initialise the vfs operations table */
+static_decl_vfs;
-struct vfs_syminfo {
+struct vfs_init_function_entry {
char *name;
- void *fptr;
+ const vfs_op_tuple *vfs_op_tuples;
+ struct vfs_init_function_entry *prev, *next;
};
-/*
- Opaque (final) vfs operations. This is a combination of first-met opaque vfs operations
- across all currently processed modules. */
-
-static vfs_op_tuple vfs_opaque_ops[SMB_VFS_OP_LAST];
-
-/* Default vfs hooks. WARNING: The order of these initialisers is
- very important. They must be in the same order as defined in
- vfs.h. Change at your own peril. */
-
-static struct vfs_ops default_vfs_ops = {
-
- /* Disk operations */
-
- vfswrap_dummy_connect,
- vfswrap_dummy_disconnect,
- vfswrap_disk_free,
-
- /* Directory operations */
-
- vfswrap_opendir,
- vfswrap_readdir,
- vfswrap_mkdir,
- vfswrap_rmdir,
- vfswrap_closedir,
-
- /* File operations */
-
- vfswrap_open,
- vfswrap_close,
- vfswrap_read,
- vfswrap_write,
- vfswrap_lseek,
- vfswrap_sendfile,
- vfswrap_rename,
- vfswrap_fsync,
- vfswrap_stat,
- vfswrap_fstat,
- vfswrap_lstat,
- vfswrap_unlink,
- vfswrap_chmod,
- vfswrap_fchmod,
- vfswrap_chown,
- vfswrap_fchown,
- vfswrap_chdir,
- vfswrap_getwd,
- vfswrap_utime,
- vfswrap_ftruncate,
- vfswrap_lock,
- vfswrap_symlink,
- vfswrap_readlink,
- vfswrap_link,
- vfswrap_mknod,
- vfswrap_realpath,
-
- vfswrap_fget_nt_acl,
- vfswrap_get_nt_acl,
- vfswrap_fset_nt_acl,
- vfswrap_set_nt_acl,
-
- /* POSIX ACL operations. */
-#if defined(HAVE_NO_ACLS)
- NULL,
- NULL,
-#else
- vfswrap_chmod_acl,
- vfswrap_fchmod_acl,
-#endif
- vfswrap_sys_acl_get_entry,
- vfswrap_sys_acl_get_tag_type,
- vfswrap_sys_acl_get_permset,
- vfswrap_sys_acl_get_qualifier,
- vfswrap_sys_acl_get_file,
- vfswrap_sys_acl_get_fd,
- vfswrap_sys_acl_clear_perms,
- vfswrap_sys_acl_add_perm,
- vfswrap_sys_acl_to_text,
- vfswrap_sys_acl_init,
- vfswrap_sys_acl_create_entry,
- vfswrap_sys_acl_set_tag_type,
- vfswrap_sys_acl_set_qualifier,
- vfswrap_sys_acl_set_permset,
- vfswrap_sys_acl_valid,
- vfswrap_sys_acl_set_file,
- vfswrap_sys_acl_set_fd,
- vfswrap_sys_acl_delete_def_file,
- vfswrap_sys_acl_get_perm,
- vfswrap_sys_acl_free_text,
- vfswrap_sys_acl_free_acl,
- vfswrap_sys_acl_free_qualifier
-};
+static struct vfs_init_function_entry *backends = NULL;
/****************************************************************************
maintain the list of available backends
****************************************************************************/
-struct vfs_init_function_entry *vfs_find_backend_entry(const char *name)
+static struct vfs_init_function_entry *vfs_find_backend_entry(const char *name)
{
- struct vfs_init_function_entry *entry = backends;
- pstring stripped;
+ struct vfs_init_function_entry *entry = backends;
- module_path_get_name(name, stripped);
-
- while(entry) {
- if (strequal(entry->name, stripped)) return entry;
- entry = entry->next;
- }
+ DEBUG(10, ("vfs_find_backend_entry called for %s\n", name));
+
+ while(entry) {
+ if (strcmp(entry->name, name)==0) return entry;
+ entry = entry->next;
+ }
- return NULL;
+ return NULL;
}
-BOOL smb_register_vfs(const char *name, vfs_op_tuple *(*init)(const struct vfs_ops *, struct smb_vfs_handle_struct *), int version)
+NTSTATUS smb_register_vfs(int version, const char *name, const vfs_op_tuple *vfs_op_tuples)
{
- struct vfs_init_function_entry *entry = backends;
-
- if ((version < SMB_VFS_INTERFACE_CASCADED)) {
- DEBUG(0, ("vfs_init() returned wrong interface version info (was %d, should be no less than %d)\n",
- version, SMB_VFS_INTERFACE_VERSION ));
- return False;
- }
-
- if ((version < SMB_VFS_INTERFACE_VERSION)) {
- DEBUG(0, ("Warning: vfs_init() states that module confirms interface version #%d, current interface version is #%d.\n\
- Proceeding in compatibility mode, new operations (since version #%d) will fallback to default ones.\n",
- version, SMB_VFS_INTERFACE_VERSION, version ));
- return False;
- }
-
- while(entry) {
- if (strequal(entry->name, name)) {
- DEBUG(0,("VFS module %s already loaded!\n", name));
- return False;
- }
- entry = entry->next;
- }
-
- entry = smb_xmalloc(sizeof(struct vfs_init_function_entry));
- entry->name = smb_xstrdup(name);
- entry->init = init;
-
- DLIST_ADD(backends, entry);
- DEBUG(5, ("Successfully added vfs backend '%s'\n", name));
- return True;
+ struct vfs_init_function_entry *entry = backends;
+
+ if ((version != SMB_VFS_INTERFACE_VERSION)) {
+ DEBUG(0, ("Failed to register vfs module.\n"
+ "The module was compiled against SMB_VFS_INTERFACE_VERSION %d,\n"
+ "current SMB_VFS_INTERFACE_VERSION is %d.\n"
+ "Please recompile against the current Samba Version!\n",
+ version, SMB_VFS_INTERFACE_VERSION));
+ return NT_STATUS_OBJECT_TYPE_MISMATCH;
+ }
+
+ if (!name || !name[0] || !vfs_op_tuples) {
+ DEBUG(0,("smb_register_vfs() called with NULL pointer or empty name!\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (vfs_find_backend_entry(name)) {
+ DEBUG(0,("VFS module %s already loaded!\n", name));
+ return NT_STATUS_OBJECT_NAME_COLLISION;
+ }
+
+ entry = SMB_XMALLOC_P(struct vfs_init_function_entry);
+ entry->name = smb_xstrdup(name);
+ entry->vfs_op_tuples = vfs_op_tuples;
+
+ DLIST_ADD(backends, entry);
+ DEBUG(5, ("Successfully added vfs backend '%s'\n", name));
+ return NT_STATUS_OK;
}
/****************************************************************************
static void vfs_init_default(connection_struct *conn)
{
DEBUG(3, ("Initialising default vfs hooks\n"));
-
- memcpy(&conn->vfs_ops, &default_vfs_ops, sizeof(struct vfs_ops));
- conn->vfs_private = NULL;
+ vfs_init_custom(conn, DEFAULT_VFS_MODULE_NAME);
}
-/***************************************************************************
- Function to load old VFS modules. Should go away after a while.
- **************************************************************************/
+/****************************************************************************
+ initialise custom vfs hooks
+ ****************************************************************************/
-static vfs_op_tuple *vfs_load_old_plugin(connection_struct *conn, const char *vfs_object)
+static inline void vfs_set_operation(struct vfs_ops * vfs, vfs_op_type which,
+ struct vfs_handle_struct * handle, void * op)
{
- int vfs_version = -1;
- vfs_op_tuple *ops, *(*init_fptr)(int *, const struct vfs_ops *, struct smb_vfs_handle_struct *);
- /* Open object file */
+ ((struct vfs_handle_struct **)&vfs->handles)[which] = handle;
+ ((void **)(void *)&vfs->ops)[which] = op;
+}
- if ((conn->vfs_private->handle = sys_dlopen(vfs_object, RTLD_NOW)) == NULL) {
- DEBUG(0, ("Error opening %s: %s\n", vfs_object, sys_dlerror()));
- return NULL;
+bool vfs_init_custom(connection_struct *conn, const char *vfs_object)
+{
+ const vfs_op_tuple *ops;
+ char *module_path = NULL;
+ char *module_name = NULL;
+ char *module_param = NULL, *p;
+ int i;
+ vfs_handle_struct *handle;
+ const struct vfs_init_function_entry *entry;
+
+ if (!conn||!vfs_object||!vfs_object[0]) {
+ DEBUG(0,("vfs_init_custon() called with NULL pointer or emtpy vfs_object!\n"));
+ return False;
+ }
+
+ if(!backends) {
+ static_init_vfs;
}
- /* Get handle on vfs_init() symbol */
+ DEBUG(3, ("Initialising custom vfs hooks from [%s]\n", vfs_object));
- init_fptr = (vfs_op_tuple *(*)(int *, const struct vfs_ops *, struct smb_vfs_handle_struct *))sys_dlsym(conn->vfs_private->handle, "vfs_init");
+ module_path = smb_xstrdup(vfs_object);
- if (init_fptr == NULL) {
- DEBUG(0, ("No vfs_init() symbol found in %s\n", vfs_object));
- sys_dlclose(conn->vfs_private->handle);
- return NULL;
+ p = strchr_m(module_path, ':');
+
+ if (p) {
+ *p = 0;
+ module_param = p+1;
+ trim_char(module_param, ' ', ' ');
}
- /* Initialise vfs_ops structure */
- if ((ops = init_fptr(&vfs_version, &conn->vfs_ops, conn->vfs_private)) == NULL) {
- DEBUG(0, ("vfs_init() function from %s failed\n", vfs_object));
- sys_dlclose(conn->vfs_private->handle);
- return NULL;
+ trim_char(module_path, ' ', ' ');
+
+ module_name = smb_xstrdup(module_path);
+
+ if ((module_name[0] == '/') &&
+ (strcmp(module_path, DEFAULT_VFS_MODULE_NAME) != 0)) {
+
+ /*
+ * Extract the module name from the path. Just use the base
+ * name of the last path component.
+ */
+
+ SAFE_FREE(module_name);
+ module_name = smb_xstrdup(strrchr_m(module_path, '/')+1);
+
+ p = strchr_m(module_name, '.');
+
+ if (p != NULL) {
+ *p = '\0';
+ }
}
- if ((vfs_version < SMB_VFS_INTERFACE_CASCADED)) {
- DEBUG(0, ("vfs_init() returned wrong interface version info (was %d, should be no less than %d)\n",
- vfs_version, SMB_VFS_INTERFACE_VERSION ));
- sys_dlclose(conn->vfs_private->handle);
- return NULL;
+ /* First, try to load the module with the new module system */
+ if((entry = vfs_find_backend_entry(module_name)) ||
+ (NT_STATUS_IS_OK(smb_probe_module("vfs", module_path)) &&
+ (entry = vfs_find_backend_entry(module_name)))) {
+
+ DEBUGADD(5,("Successfully loaded vfs module [%s] with the new modules system\n", vfs_object));
+
+ if ((ops = entry->vfs_op_tuples) == NULL) {
+ DEBUG(0, ("entry->vfs_op_tuples==NULL for [%s] failed\n", vfs_object));
+ goto fail;
+ }
+ } else {
+ DEBUG(0,("Can't find a vfs module [%s]\n",vfs_object));
+ goto fail;
}
- if ((vfs_version < SMB_VFS_INTERFACE_VERSION)) {
- DEBUG(0, ("Warning: vfs_init() states that module confirms interface version #%d, current interface version is #%d.\n\
- Proceeding in compatibility mode, new operations (since version #%d) will fallback to default ones.\n",
- vfs_version, SMB_VFS_INTERFACE_VERSION, vfs_version ));
- sys_dlclose(conn->vfs_private->handle);
- return NULL;
+ handle = TALLOC_ZERO_P(conn->mem_ctx,vfs_handle_struct);
+ if (!handle) {
+ DEBUG(0,("TALLOC_ZERO() failed!\n"));
+ goto fail;
}
-
- return ops;
-}
+ memcpy(&handle->vfs_next, &conn->vfs, sizeof(struct vfs_ops));
+ handle->conn = conn;
+ if (module_param) {
+ handle->param = talloc_strdup(conn->mem_ctx, module_param);
+ }
+ DLIST_ADD(conn->vfs_handles, handle);
+ for(i=0; ops[i].op != NULL; i++) {
+ DEBUG(5, ("Checking operation #%d (type %d, layer %d)\n", i, ops[i].type, ops[i].layer));
+ if(ops[i].layer == SMB_VFS_LAYER_OPAQUE) {
+ /* If this operation was already made opaque by different module, it
+ * will be overridden here.
+ */
+ DEBUGADD(5, ("Making operation type %d opaque [module %s]\n", ops[i].type, vfs_object));
+ vfs_set_operation(&conn->vfs_opaque, ops[i].type, handle, ops[i].op);
+ }
+ /* Change current VFS disposition*/
+ DEBUGADD(5, ("Accepting operation type %d from module %s\n", ops[i].type, vfs_object));
+ vfs_set_operation(&conn->vfs, ops[i].type, handle, ops[i].op);
+ }
+ SAFE_FREE(module_path);
+ SAFE_FREE(module_name);
+ return True;
-/****************************************************************************
- initialise custom vfs hooks
- ****************************************************************************/
+ fail:
+ SAFE_FREE(module_path);
+ SAFE_FREE(module_name);
+ return False;
+}
+
+/*****************************************************************
+ Allow VFS modules to extend files_struct with VFS-specific state.
+ This will be ok for small numbers of extensions, but might need to
+ be refactored if it becomes more widely used.
+******************************************************************/
-BOOL vfs_init_custom(connection_struct *conn, const char *vfs_object)
+#define EXT_DATA_AREA(e) ((uint8 *)(e) + sizeof(struct vfs_fsp_data))
+
+void *vfs_add_fsp_extension_notype(vfs_handle_struct *handle, files_struct *fsp, size_t ext_size)
{
- vfs_op_tuple *ops;
- int i;
- struct vfs_init_function_entry *entry;
+ struct vfs_fsp_data *ext;
+ void * ext_data;
- DEBUG(3, ("Initialising custom vfs hooks from %s\n", vfs_object));
+ /* Prevent VFS modules adding multiple extensions. */
+ if ((ext_data = vfs_fetch_fsp_extension(handle, fsp))) {
+ return ext_data;
+ }
- if(!backends) static_init_vfs;
+ ext = (struct vfs_fsp_data *)TALLOC_ZERO(
+ handle->conn->mem_ctx, sizeof(struct vfs_fsp_data) + ext_size);
+ if (ext == NULL) {
+ return NULL;
+ }
- /* First, try to load the module with the new module system */
- if((entry = vfs_find_backend_entry(vfs_object)) ||
- (smb_probe_module("vfs", vfs_object) &&
- (entry = vfs_find_backend_entry(vfs_object)))) {
+ ext->owner = handle;
+ ext->next = fsp->vfs_extension;
+ fsp->vfs_extension = ext;
+ return EXT_DATA_AREA(ext);
+}
- DEBUG(3,("Successfully loaded %s with the new modules system\n", vfs_object));
-
- if ((ops = entry->init(&conn->vfs_ops, conn->vfs_private)) == NULL) {
- DEBUG(0, ("vfs init function from %s failed\n", vfs_object));
- return False;
+void vfs_remove_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
+{
+ struct vfs_fsp_data *curr;
+ struct vfs_fsp_data *prev;
+
+ for (curr = fsp->vfs_extension, prev = NULL;
+ curr;
+ prev = curr, curr = curr->next) {
+ if (curr->owner == handle) {
+ if (prev) {
+ prev->next = curr->next;
+ } else {
+ fsp->vfs_extension = curr->next;
+ }
+ TALLOC_FREE(curr);
+ return;
}
- } else {
- /* If that doesn't work, fall back to the old system
- * (This part should go away after a while, it's only here
- * for backwards compatibility) */
- DEBUG(2, ("Can't load module %s with new modules system, falling back to compatibility\n",
- vfs_object));
- if ((ops = vfs_load_old_plugin(conn, vfs_object)) == NULL) {
- DEBUG(0, ("vfs init function from %s failed\n", vfs_object));
- return False;
+ }
+}
+
+void *vfs_memctx_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
+{
+ struct vfs_fsp_data *head;
+
+ for (head = fsp->vfs_extension; head; head = head->next) {
+ if (head->owner == handle) {
+ return head;
}
}
- for(i=0; ops[i].op != NULL; i++) {
- DEBUG(3, ("Checking operation #%d (type %d, layer %d)\n", i, ops[i].type, ops[i].layer));
- if(ops[i].layer == SMB_VFS_LAYER_OPAQUE) {
- /* Check whether this operation was already made opaque by different module */
- if(vfs_opaque_ops[ops[i].type].op == ((void**)&default_vfs_ops)[ops[i].type]) {
- /* No, it isn't overloaded yet. Overload. */
- DEBUG(3, ("Making operation type %d opaque [module %s]\n", ops[i].type, vfs_object));
- vfs_opaque_ops[ops[i].type] = ops[i];
- }
- }
- /* Change current VFS disposition*/
- DEBUG(3, ("Accepting operation type %d from module %s\n", ops[i].type, vfs_object));
- ((void**)&conn->vfs_ops)[ops[i].type] = ops[i].op;
+ return NULL;
+}
+
+void *vfs_fetch_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
+{
+ struct vfs_fsp_data *head;
+
+ head = (struct vfs_fsp_data *)vfs_memctx_fsp_extension(handle, fsp);
+ if (head != NULL) {
+ return EXT_DATA_AREA(head);
}
- return True;
+ return NULL;
}
+#undef EXT_DATA_AREA
+
/*****************************************************************
Generic VFS init.
******************************************************************/
-BOOL smbd_vfs_init(connection_struct *conn)
+bool smbd_vfs_init(connection_struct *conn)
{
const char **vfs_objects;
- char *vfs_module, *vfs_path;
unsigned int i = 0;
int j = 0;
- struct smb_vfs_handle_struct *handle;
/* Normal share - initialise with disk access functions */
vfs_init_default(conn);
- vfs_objects = lp_vfsobj(SNUM(conn));
+ vfs_objects = lp_vfs_objects(SNUM(conn));
- /* Override VFS functions if 'vfs object' was specified*/
- if (!vfs_objects)
+ /* Override VFS functions if 'vfs object' was not specified*/
+ if (!vfs_objects || !vfs_objects[0])
return True;
-
- for(i=0; i<SMB_VFS_OP_LAST; i++) {
- vfs_opaque_ops[i].op = ((void**)&default_vfs_ops)[i];
- vfs_opaque_ops[i].type = i;
- vfs_opaque_ops[i].layer = SMB_VFS_LAYER_OPAQUE;
+
+ for (i=0; vfs_objects[i] ;) {
+ i++;
}
- vfs_path = lp_vfs_path(SNUM(conn));
-
- for (i=0; vfs_objects[i]; i++); /* count passed modules */
-
for (j=i-1; j >= 0; j--) {
- conn->vfs_private = NULL;
- handle = (struct smb_vfs_handle_struct *) smb_xmalloc(sizeof(smb_vfs_handle_struct));
- /* Loadable object file */
- handle->handle = NULL;
- DLIST_ADD(conn->vfs_private, handle);
- vfs_module = NULL;
- if (vfs_path && *vfs_path) {
- asprintf(&vfs_module, "%s/%s", vfs_path, vfs_objects[j]);
- } else {
- asprintf(&vfs_module, "%s", vfs_objects[j]);
- }
- if (!vfs_init_custom(conn, vfs_module)) {
- DEBUG(0, ("smbd_vfs_init: vfs_init_custom failed for %s\n", vfs_module));
- SAFE_FREE(vfs_module);
- DLIST_REMOVE(conn->vfs_private, handle);
- SAFE_FREE(handle);
+ if (!vfs_init_custom(conn, vfs_objects[j])) {
+ DEBUG(0, ("smbd_vfs_init: vfs_init_custom failed for %s\n", vfs_objects[j]));
return False;
}
- SAFE_FREE(vfs_module);
}
return True;
}
-/*******************************************************************
- Create vfs_ops reflecting current vfs_opaque_ops
-*******************************************************************/
-
-struct vfs_ops *smb_vfs_get_opaque_ops(void)
-{
- int i;
- struct vfs_ops *ops;
-
- ops = smb_xmalloc(sizeof(struct vfs_ops));
-
- for(i=0; i<SMB_VFS_OP_LAST; i++) {
- ((void**)ops)[i] = vfs_opaque_ops[i].op;
- }
- return ops;
-}
-
/*******************************************************************
Check if directory exists.
********************************************************************/
-BOOL vfs_directory_exist(connection_struct *conn, const char *dname, SMB_STRUCT_STAT *st)
+bool vfs_directory_exist(connection_struct *conn, const char *dname, SMB_STRUCT_STAT *st)
{
SMB_STRUCT_STAT st2;
- BOOL ret;
+ bool ret;
if (!st)
st = &st2;
- if (vfs_stat(conn,dname,st) != 0)
+ if (SMB_VFS_STAT(conn,dname,st) != 0)
return(False);
ret = S_ISDIR(st->st_mode);
return ret;
}
-/*******************************************************************
- vfs getwd wrapper
-********************************************************************/
-
-static char *vfs_getwd(connection_struct *conn, char *path)
-{
- return conn->vfs_ops.getwd(conn,path);
-}
-
-/*******************************************************************
- vfs mkdir wrapper
-********************************************************************/
-
-int vfs_mkdir(connection_struct *conn, const char *name, mode_t mode)
-{
- int ret;
- SMB_STRUCT_STAT sbuf;
-
- if(!(ret=conn->vfs_ops.mkdir(conn,name,mode))) {
-
- inherit_access_acl(conn, name, mode);
-
- /*
- * Check if high bits should have been set,
- * then (if bits are missing): add them.
- * Consider bits automagically set by UNIX, i.e. SGID bit from parent dir.
- */
- if(mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) &&
- !vfs_stat(conn,name,&sbuf) && (mode & ~sbuf.st_mode))
- vfs_chmod(conn,name,sbuf.st_mode | (mode & ~sbuf.st_mode));
- }
- return ret;
-}
-
/*******************************************************************
Check if an object exists in the vfs.
********************************************************************/
-BOOL vfs_object_exist(connection_struct *conn,const char *fname,SMB_STRUCT_STAT *sbuf)
+bool vfs_object_exist(connection_struct *conn,const char *fname,SMB_STRUCT_STAT *sbuf)
{
SMB_STRUCT_STAT st;
ZERO_STRUCTP(sbuf);
- if (vfs_stat(conn,fname,sbuf) == -1)
+ if (SMB_VFS_STAT(conn,fname,sbuf) == -1)
return(False);
return True;
}
Check if a file exists in the vfs.
********************************************************************/
-BOOL vfs_file_exist(connection_struct *conn, const char *fname,SMB_STRUCT_STAT *sbuf)
+bool vfs_file_exist(connection_struct *conn, const char *fname,SMB_STRUCT_STAT *sbuf)
{
SMB_STRUCT_STAT st;
ZERO_STRUCTP(sbuf);
- if (vfs_stat(conn,fname,sbuf) == -1)
+ if (SMB_VFS_STAT(conn,fname,sbuf) == -1)
return False;
return(S_ISREG(sbuf->st_mode));
}
while (total < byte_count)
{
- ssize_t ret = fsp->conn->vfs_ops.read(fsp, fsp->fd, buf + total,
+ ssize_t ret = SMB_VFS_READ(fsp, fsp->fh->fd, buf + total,
byte_count - total);
if (ret == 0) return total;
return (ssize_t)total;
}
+ssize_t vfs_pread_data(files_struct *fsp, char *buf,
+ size_t byte_count, SMB_OFF_T offset)
+{
+ size_t total=0;
+
+ while (total < byte_count)
+ {
+ ssize_t ret = SMB_VFS_PREAD(fsp, buf + total,
+ byte_count - total, offset + total);
+
+ if (ret == 0) return total;
+ if (ret == -1) {
+ if (errno == EINTR)
+ continue;
+ else
+ return -1;
+ }
+ total += ret;
+ }
+ return (ssize_t)total;
+}
+
/****************************************************************************
Write data to a fd on the vfs.
****************************************************************************/
-ssize_t vfs_write_data(files_struct *fsp,const char *buffer,size_t N)
+ssize_t vfs_write_data(struct smb_request *req,
+ files_struct *fsp,
+ const char *buffer,
+ size_t N)
{
size_t total=0;
ssize_t ret;
+ if (req && req->unread_bytes) {
+ SMB_ASSERT(req->unread_bytes == N);
+ /* VFS_RECVFILE must drain the socket
+ * before returning. */
+ req->unread_bytes = 0;
+ return SMB_VFS_RECVFILE(smbd_server_fd(),
+ fsp,
+ fsp->fh->fd,
+ (SMB_OFF_T)-1,
+ N);
+ }
+
while (total < N) {
- ret = fsp->conn->vfs_ops.write(fsp,fsp->fd,buffer + total,N - total);
+ ret = SMB_VFS_WRITE(fsp,fsp->fh->fd,buffer + total,N - total);
if (ret == -1)
return -1;
return (ssize_t)total;
}
+ssize_t vfs_pwrite_data(struct smb_request *req,
+ files_struct *fsp,
+ const char *buffer,
+ size_t N,
+ SMB_OFF_T offset)
+{
+ size_t total=0;
+ ssize_t ret;
+
+ if (req && req->unread_bytes) {
+ SMB_ASSERT(req->unread_bytes == N);
+ /* VFS_RECVFILE must drain the socket
+ * before returning. */
+ req->unread_bytes = 0;
+ return SMB_VFS_RECVFILE(smbd_server_fd(),
+ fsp,
+ fsp->fh->fd,
+ offset,
+ N);
+ }
+
+ while (total < N) {
+ ret = SMB_VFS_PWRITE(fsp, buffer + total, N - total,
+ offset + total);
+
+ if (ret == -1)
+ return -1;
+ if (ret == 0)
+ return total;
+
+ total += ret;
+ }
+ return (ssize_t)total;
+}
/****************************************************************************
An allocate file space call using the vfs interface.
Allocates space for a file from a filedescriptor.
int ret;
SMB_STRUCT_STAT st;
connection_struct *conn = fsp->conn;
- struct vfs_ops *vfs_ops = &conn->vfs_ops;
SMB_BIG_UINT space_avail;
SMB_BIG_UINT bsize,dfree,dsize;
if (((SMB_OFF_T)len) < 0) {
DEBUG(0,("vfs_allocate_file_space: %s negative len requested.\n", fsp->fsp_name ));
+ errno = EINVAL;
return -1;
}
- ret = vfs_fstat(fsp,fsp->fd,&st);
+ ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,&st);
if (ret == -1)
return ret;
fsp->fsp_name, (double)st.st_size ));
flush_write_cache(fsp, SIZECHANGE_FLUSH);
- if ((ret = vfs_ops->ftruncate(fsp, fsp->fd, (SMB_OFF_T)len)) != -1) {
+ if ((ret = SMB_VFS_FTRUNCATE(fsp, fsp->fh->fd, (SMB_OFF_T)len)) != -1) {
set_filelen_write_cache(fsp, len);
}
return ret;
len -= st.st_size;
len /= 1024; /* Len is now number of 1k blocks needed. */
- space_avail = conn->vfs_ops.disk_free(conn,fsp->fsp_name,False,&bsize,&dfree,&dsize);
+ space_avail = get_dfree_info(conn,fsp->fsp_name,False,&bsize,&dfree,&dsize);
+ if (space_avail == (SMB_BIG_UINT)-1) {
+ return -1;
+ }
DEBUG(10,("vfs_allocate_file_space: file %s, grow. Current size %.0f, needed blocks = %.0f, space avail = %.0f\n",
fsp->fsp_name, (double)st.st_size, (double)len, (double)space_avail ));
release_level_2_oplocks_on_change(fsp);
DEBUG(10,("vfs_set_filelen: ftruncate %s to len %.0f\n", fsp->fsp_name, (double)len));
flush_write_cache(fsp, SIZECHANGE_FLUSH);
- if ((ret = fsp->conn->vfs_ops.ftruncate(fsp, fsp->fd, len)) != -1)
+ if ((ret = SMB_VFS_FTRUNCATE(fsp, fsp->fh->fd, len)) != -1) {
set_filelen_write_cache(fsp, len);
+ notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED,
+ FILE_NOTIFY_CHANGE_SIZE
+ | FILE_NOTIFY_CHANGE_ATTRIBUTES,
+ fsp->fsp_name);
+ }
return ret;
}
+/****************************************************************************
+ A vfs fill sparse call.
+ Writes zeros from the end of file to len, if len is greater than EOF.
+ Used only by strict_sync.
+ Returns 0 on success, -1 on failure.
+****************************************************************************/
+
+static char *sparse_buf;
+#define SPARSE_BUF_WRITE_SIZE (32*1024)
+
+int vfs_fill_sparse(files_struct *fsp, SMB_OFF_T len)
+{
+ int ret;
+ SMB_STRUCT_STAT st;
+ SMB_OFF_T offset;
+ size_t total;
+ size_t num_to_write;
+ ssize_t pwrite_ret;
+
+ release_level_2_oplocks_on_change(fsp);
+ ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,&st);
+ if (ret == -1) {
+ return ret;
+ }
+
+ if (len <= st.st_size) {
+ return 0;
+ }
+
+ DEBUG(10,("vfs_fill_sparse: write zeros in file %s from len %.0f to len %.0f (%.0f bytes)\n",
+ fsp->fsp_name, (double)st.st_size, (double)len, (double)(len - st.st_size)));
+
+ flush_write_cache(fsp, SIZECHANGE_FLUSH);
+
+ if (!sparse_buf) {
+ sparse_buf = SMB_CALLOC_ARRAY(char, SPARSE_BUF_WRITE_SIZE);
+ if (!sparse_buf) {
+ errno = ENOMEM;
+ return -1;
+ }
+ }
+
+ offset = st.st_size;
+ num_to_write = len - st.st_size;
+ total = 0;
+
+ while (total < num_to_write) {
+ size_t curr_write_size = MIN(SPARSE_BUF_WRITE_SIZE, (num_to_write - total));
+
+ pwrite_ret = SMB_VFS_PWRITE(fsp, sparse_buf, curr_write_size, offset + total);
+ if (pwrite_ret == -1) {
+ DEBUG(10,("vfs_fill_sparse: SMB_VFS_PWRITE for file %s failed with error %s\n",
+ fsp->fsp_name, strerror(errno) ));
+ return -1;
+ }
+ if (pwrite_ret == 0) {
+ return 0;
+ }
+
+ total += pwrite_ret;
+ }
+
+ set_filelen_write_cache(fsp, len);
+ return 0;
+}
+
/****************************************************************************
Transfer some data (n bytes) between two file_struct's.
****************************************************************************/
static ssize_t read_fn(int fd, void *buf, size_t len)
{
- return in_fsp->conn->vfs_ops.read(in_fsp, fd, buf, len);
+ return SMB_VFS_READ(in_fsp, fd, buf, len);
}
static ssize_t write_fn(int fd, const void *buf, size_t len)
{
- return out_fsp->conn->vfs_ops.write(out_fsp, fd, buf, len);
+ return SMB_VFS_WRITE(out_fsp, fd, buf, len);
}
SMB_OFF_T vfs_transfer_file(files_struct *in, files_struct *out, SMB_OFF_T n)
in_fsp = in;
out_fsp = out;
- return transfer_file_internal(in_fsp->fd, out_fsp->fd, n, read_fn, write_fn);
+ return transfer_file_internal(in_fsp->fh->fd, out_fsp->fh->fd, n, read_fn, write_fn);
}
/*******************************************************************
char *vfs_readdirname(connection_struct *conn, void *p)
{
- struct dirent *ptr;
+ SMB_STRUCT_DIRENT *ptr= NULL;
char *dname;
if (!p)
return(NULL);
- ptr = (struct dirent *)conn->vfs_ops.readdir(conn,p);
+ ptr = SMB_VFS_READDIR(conn, (DIR *)p);
if (!ptr)
return(NULL);
return(NULL);
#endif
-#ifdef HAVE_BROKEN_READDIR
+#ifdef HAVE_BROKEN_READDIR_NAME
/* using /usr/ucb/cc is BAD */
dname = dname - 2;
#endif
return(dname);
}
-/* VFS options not quite working yet */
-
-#if 0
-
-/***************************************************************************
- handle the interpretation of the vfs option parameter
- *************************************************************************/
-static BOOL handle_vfs_option(char *pszParmValue, char **ptr)
-{
- struct vfs_options *new_option, **options = (struct vfs_options **)ptr;
- int i;
-
- /* Create new vfs option */
-
- new_option = (struct vfs_options *)malloc(sizeof(*new_option));
- if (new_option == NULL) {
- return False;
- }
-
- ZERO_STRUCTP(new_option);
-
- /* Get name and value */
-
- new_option->name = strtok(pszParmValue, "=");
-
- if (new_option->name == NULL) {
- return False;
- }
-
- while(isspace(*new_option->name)) {
- new_option->name++;
- }
-
- for (i = strlen(new_option->name); i > 0; i--) {
- if (!isspace(new_option->name[i - 1])) break;
- }
-
- new_option->name[i] = '\0';
- new_option->name = strdup(new_option->name);
-
- new_option->value = strtok(NULL, "=");
-
- if (new_option->value != NULL) {
-
- while(isspace(*new_option->value)) {
- new_option->value++;
- }
-
- for (i = strlen(new_option->value); i > 0; i--) {
- if (!isspace(new_option->value[i - 1])) break;
- }
-
- new_option->value[i] = '\0';
- new_option->value = strdup(new_option->value);
- }
-
- /* Add to list */
-
- DLIST_ADD(*options, new_option);
-
- return True;
-}
-
-#endif
-
-
/*******************************************************************
A wrapper for vfs_chdir().
********************************************************************/
int vfs_ChDir(connection_struct *conn, const char *path)
{
int res;
- static pstring LastDir="";
+ static char *LastDir = NULL;
+
+ if (!LastDir) {
+ LastDir = SMB_STRDUP("");
+ }
if (strcsequal(path,"."))
return(0);
if (*path == '/' && strcsequal(LastDir,path))
return(0);
- DEBUG(3,("vfs_ChDir to %s\n",path));
-
- res = vfs_chdir(conn,path);
- if (!res)
- pstrcpy(LastDir,path);
- return(res);
-}
-
-/* number of list structures for a caching GetWd function. */
-#define MAX_GETWDCACHE (50)
-
-static struct {
- SMB_DEV_T dev; /* These *must* be compatible with the types returned in a stat() call. */
- SMB_INO_T inode; /* These *must* be compatible with the types returned in a stat() call. */
- char *dos_path; /* The pathname in DOS format. */
- BOOL valid;
-} ino_list[MAX_GETWDCACHE];
-
-extern BOOL use_getwd_cache;
-
-/****************************************************************************
- Prompte a ptr (to make it recently used)
-****************************************************************************/
-
-static void array_promote(char *array,int elsize,int element)
-{
- char *p;
- if (element == 0)
- return;
-
- p = (char *)malloc(elsize);
+ DEBUG(4,("vfs_ChDir to %s\n",path));
- if (!p) {
- DEBUG(5,("array_promote: malloc fail\n"));
- return;
+ res = SMB_VFS_CHDIR(conn,path);
+ if (!res) {
+ SAFE_FREE(LastDir);
+ LastDir = SMB_STRDUP(path);
}
-
- memcpy(p,array + element * elsize, elsize);
- memmove(array + elsize,array,elsize*element);
- memcpy(array,p,elsize);
- SAFE_FREE(p);
+ return(res);
}
/*******************************************************************
format. Note this can be called with conn == NULL.
********************************************************************/
-char *vfs_GetWd(connection_struct *conn, char *path)
+struct getwd_cache_key {
+ SMB_DEV_T dev;
+ SMB_INO_T ino;
+};
+
+char *vfs_GetWd(TALLOC_CTX *ctx, connection_struct *conn)
{
- pstring s;
- static BOOL getwd_cache_init = False;
+ char s[PATH_MAX+1];
SMB_STRUCT_STAT st, st2;
- int i;
+ char *result;
+ DATA_BLOB cache_value;
+ struct getwd_cache_key key;
*s = 0;
- if (!use_getwd_cache)
- return(vfs_getwd(conn,path));
-
- /* init the cache */
- if (!getwd_cache_init) {
- getwd_cache_init = True;
- for (i=0;i<MAX_GETWDCACHE;i++) {
- string_set(&ino_list[i].dos_path,"");
- ino_list[i].valid = False;
- }
+ if (!lp_getwd_cache()) {
+ goto nocache;
}
- /* Get the inode of the current directory, if this doesn't work we're
- in trouble :-) */
+ SET_STAT_INVALID(st);
- if (vfs_stat(conn, ".",&st) == -1) {
- DEBUG(0,("Very strange, couldn't stat \".\" path=%s\n", path));
- return(vfs_getwd(conn,path));
+ if (SMB_VFS_STAT(conn, ".",&st) == -1) {
+ /*
+ * Known to fail for root: the directory may be NFS-mounted
+ * and exported with root_squash (so has no root access).
+ */
+ DEBUG(1,("vfs_GetWd: couldn't stat \".\" error %s "
+ "(NFS problem ?)\n", strerror(errno) ));
+ goto nocache;
}
+ ZERO_STRUCT(key); /* unlikely, but possible padding */
+ key.dev = st.st_dev;
+ key.ino = st.st_ino;
- for (i=0; i<MAX_GETWDCACHE; i++) {
- if (ino_list[i].valid) {
-
- /* If we have found an entry with a matching inode and dev number
- then find the inode number for the directory in the cached string.
- If this agrees with that returned by the stat for the current
- directory then all is o.k. (but make sure it is a directory all
- the same...) */
-
- if (st.st_ino == ino_list[i].inode && st.st_dev == ino_list[i].dev) {
- if (vfs_stat(conn,ino_list[i].dos_path,&st2) == 0) {
- if (st.st_ino == st2.st_ino && st.st_dev == st2.st_dev &&
- (st2.st_mode & S_IFMT) == S_IFDIR) {
- pstrcpy (path, ino_list[i].dos_path);
-
- /* promote it for future use */
- array_promote((char *)&ino_list[0],sizeof(ino_list[0]),i);
- return (path);
- } else {
- /* If the inode is different then something's changed,
- scrub the entry and start from scratch. */
- ino_list[i].valid = False;
- }
- }
- }
- }
+ if (!memcache_lookup(smbd_memcache(), GETWD_CACHE,
+ data_blob_const(&key, sizeof(key)),
+ &cache_value)) {
+ goto nocache;
}
- /* We don't have the information to hand so rely on traditional methods.
- The very slow getcwd, which spawns a process on some systems, or the
- not quite so bad getwd. */
+ SMB_ASSERT((cache_value.length > 0)
+ && (cache_value.data[cache_value.length-1] == '\0'));
- if (!vfs_getwd(conn,s)) {
- DEBUG(0,("vfs_GetWd: vfs_getwd call failed, errno %s\n",strerror(errno)));
- return (NULL);
+ if ((SMB_VFS_STAT(conn, (char *)cache_value.data, &st2) == 0)
+ && (st.st_dev == st2.st_dev) && (st.st_ino == st2.st_ino)
+ && (S_ISDIR(st.st_mode))) {
+ /*
+ * Ok, we're done
+ */
+ result = talloc_strdup(ctx, (char *)cache_value.data);
+ if (result == NULL) {
+ errno = ENOMEM;
+ }
+ return result;
}
- pstrcpy(path,s);
+ nocache:
- DEBUG(5,("vfs_GetWd %s, inode %.0f, dev %.0f\n",s,(double)st.st_ino,(double)st.st_dev));
-
- /* add it to the cache */
- i = MAX_GETWDCACHE - 1;
- string_set(&ino_list[i].dos_path,s);
- ino_list[i].dev = st.st_dev;
- ino_list[i].inode = st.st_ino;
- ino_list[i].valid = True;
-
- /* put it at the top of the list */
- array_promote((char *)&ino_list[0],sizeof(ino_list[0]),i);
-
- return (path);
-}
-
-
-/* check if the file 'nmae' is a symlink, in that case check that it point to
- a file that reside under the 'dir' tree */
+ /*
+ * We don't have the information to hand so rely on traditional
+ * methods. The very slow getcwd, which spawns a process on some
+ * systems, or the not quite so bad getwd.
+ */
-static BOOL readlink_check(connection_struct *conn, const char *dir, char *name)
-{
- BOOL ret = True;
- pstring flink;
- pstring cleanlink;
- pstring savedir;
- pstring realdir;
- size_t reallen;
-
- if (!vfs_GetWd(conn, savedir)) {
- DEBUG(0,("couldn't vfs_GetWd for %s %s\n", name, dir));
- return False;
+ if (!SMB_VFS_GETWD(conn,s)) {
+ DEBUG(0, ("vfs_GetWd: SMB_VFS_GETWD call failed: %s\n",
+ strerror(errno)));
+ return NULL;
}
- if (vfs_ChDir(conn, dir) != 0) {
- DEBUG(0,("couldn't vfs_ChDir to %s\n", dir));
- return False;
- }
+ if (lp_getwd_cache() && VALID_STAT(st)) {
+ ZERO_STRUCT(key); /* unlikely, but possible padding */
+ key.dev = st.st_dev;
+ key.ino = st.st_ino;
- if (!vfs_GetWd(conn, realdir)) {
- DEBUG(0,("couldn't vfs_GetWd for %s\n", dir));
- vfs_ChDir(conn, savedir);
- return(False);
- }
-
- reallen = strlen(realdir);
- if (realdir[reallen -1] == '/') {
- reallen--;
- realdir[reallen] = 0;
+ memcache_add(smbd_memcache(), GETWD_CACHE,
+ data_blob_const(&key, sizeof(key)),
+ data_blob_const(s, strlen(s)+1));
}
- if (conn->vfs_ops.readlink(conn, name, flink, sizeof(pstring) -1) != -1) {
- DEBUG(3,("reduce_name: file path name %s is a symlink\nChecking it's path\n", name));
- if (*flink == '/') {
- pstrcpy(cleanlink, flink);
- } else {
- pstrcpy(cleanlink, realdir);
- pstrcat(cleanlink, "/");
- pstrcat(cleanlink, flink);
- }
- unix_clean_name(cleanlink);
-
- if (strncmp(cleanlink, realdir, reallen) != 0) {
- DEBUG(2,("Bad access attempt? s=%s dir=%s newname=%s l=%d\n", name, realdir, cleanlink, (int)reallen));
- ret = False;
- }
+ result = talloc_strdup(ctx, s);
+ if (result == NULL) {
+ errno = ENOMEM;
}
-
- vfs_ChDir(conn, savedir);
-
- return ret;
+ return result;
}
/*******************************************************************
Reduce a file name, removing .. elements and checking that
- it is below dir in the heirachy. This uses vfs_GetWd() and so must be run
- on the system that has the referenced file system.
- Widelinks are allowed if widelinks is true.
+ it is below dir in the heirachy. This uses realpath.
********************************************************************/
-BOOL reduce_name(connection_struct *conn, pstring s, const char *dir,BOOL widelinks)
+NTSTATUS check_reduced_name(connection_struct *conn, const char *fname)
{
-#ifndef REDUCE_PATHS
- return True;
+#ifdef REALPATH_TAKES_NULL
+ bool free_resolved_name = True;
#else
- pstring dir2;
- pstring wd;
- pstring base_name;
- pstring newname;
- char *p=NULL;
- BOOL relative = (*s != '/');
-
- *dir2 = *wd = *base_name = *newname = 0;
-
- if (widelinks) {
- unix_clean_name(s);
- /* can't have a leading .. */
- if (strncmp(s,"..",2) == 0 && (s[2]==0 || s[2]=='/')) {
- DEBUG(3,("Illegal file name? (%s)\n",s));
- return(False);
- }
-
- if (strlen(s) == 0)
- pstrcpy(s,"./");
-
- return(True);
- }
-
- DEBUG(3,("reduce_name [%s] [%s]\n",s,dir));
-
- /* remove any double slashes */
- all_string_sub(s,"//","/",0);
-
- pstrcpy(base_name,s);
- p = strrchr_m(base_name,'/');
-
- if (!p)
- return readlink_check(conn, dir, s);
-
- if (!vfs_GetWd(conn,wd)) {
- DEBUG(0,("couldn't vfs_GetWd for %s %s\n",s,dir));
- return(False);
- }
-
- if (vfs_ChDir(conn,dir) != 0) {
- DEBUG(0,("couldn't vfs_ChDir to %s\n",dir));
- return(False);
- }
+ char resolved_name_buf[PATH_MAX+1];
+ bool free_resolved_name = False;
+#endif
+ char *resolved_name = NULL;
+ size_t con_path_len = strlen(conn->connectpath);
+ char *p = NULL;
- if (!vfs_GetWd(conn,dir2)) {
- DEBUG(0,("couldn't vfs_GetWd for %s\n",dir));
- vfs_ChDir(conn,wd);
- return(False);
- }
+ DEBUG(3,("reduce_name [%s] [%s]\n", fname, conn->connectpath));
- if (p && (p != base_name)) {
- *p = 0;
- if (strcmp(p+1,".")==0)
- p[1]=0;
- if (strcmp(p+1,"..")==0)
- *p = '/';
- }
+#ifdef REALPATH_TAKES_NULL
+ resolved_name = SMB_VFS_REALPATH(conn,fname,NULL);
+#else
+ resolved_name = SMB_VFS_REALPATH(conn,fname,resolved_name_buf);
+#endif
- if (vfs_ChDir(conn,base_name) != 0) {
- vfs_ChDir(conn,wd);
- DEBUG(3,("couldn't vfs_ChDir for %s %s basename=%s\n",s,dir,base_name));
- return(False);
- }
+ if (!resolved_name) {
+ switch (errno) {
+ case ENOTDIR:
+ DEBUG(3,("reduce_name: Component not a directory in getting realpath for %s\n", fname));
+ return map_nt_error_from_unix(errno);
+ case ENOENT:
+ {
+ TALLOC_CTX *tmp_ctx = talloc_stackframe();
+ char *tmp_fname = NULL;
+ char *last_component = NULL;
+ /* Last component didn't exist. Remove it and try and canonicalise the directory. */
+
+ tmp_fname = talloc_strdup(tmp_ctx, fname);
+ if (!tmp_fname) {
+ TALLOC_FREE(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+ p = strrchr_m(tmp_fname, '/');
+ if (p) {
+ *p++ = '\0';
+ last_component = p;
+ } else {
+ last_component = tmp_fname;
+ tmp_fname = talloc_strdup(tmp_ctx,
+ ".");
+ if (!tmp_fname) {
+ TALLOC_FREE(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
- if (!vfs_GetWd(conn,newname)) {
- vfs_ChDir(conn,wd);
- DEBUG(2,("couldn't get vfs_GetWd for %s %s\n",s,base_name));
- return(False);
+#ifdef REALPATH_TAKES_NULL
+ resolved_name = SMB_VFS_REALPATH(conn,tmp_fname,NULL);
+#else
+ resolved_name = SMB_VFS_REALPATH(conn,tmp_fname,resolved_name_buf);
+#endif
+ if (!resolved_name) {
+ DEBUG(3,("reduce_name: couldn't get realpath for %s\n", fname));
+ TALLOC_FREE(tmp_ctx);
+ return map_nt_error_from_unix(errno);
+ }
+ tmp_fname = talloc_asprintf(tmp_ctx,
+ "%s/%s",
+ resolved_name,
+ last_component);
+ if (!tmp_fname) {
+ TALLOC_FREE(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+#ifdef REALPATH_TAKES_NULL
+ SAFE_FREE(resolved_name);
+ resolved_name = SMB_STRDUP(tmp_fname);
+ if (!resolved_name) {
+ DEBUG(0,("reduce_name: malloc fail for %s\n", tmp_fname));
+ return NT_STATUS_NO_MEMORY;
+ }
+#else
+ safe_strcpy(resolved_name_buf, tmp_fname, PATH_MAX);
+ resolved_name = resolved_name_buf;
+#endif
+ TALLOC_FREE(tmp_ctx);
+ break;
+ }
+ default:
+ DEBUG(1,("reduce_name: couldn't get realpath for %s\n", fname));
+ return map_nt_error_from_unix(errno);
+ }
}
- if (p && (p != base_name)) {
- pstrcat(newname,"/");
- pstrcat(newname,p+1);
- }
+ DEBUG(10,("reduce_name realpath [%s] -> [%s]\n", fname, resolved_name));
- {
- size_t l = strlen(dir2);
- if (dir2[l-1] == '/')
- l--;
-
- if (strncmp(newname,dir2,l) != 0) {
- vfs_ChDir(conn,wd);
- DEBUG(2,("Bad access attempt? s=%s dir=%s newname=%s l=%d\n",s,dir2,newname,(int)l));
- return(False);
+ if (*resolved_name != '/') {
+ DEBUG(0,("reduce_name: realpath doesn't return absolute paths !\n"));
+ if (free_resolved_name) {
+ SAFE_FREE(resolved_name);
}
+ return NT_STATUS_OBJECT_NAME_INVALID;
+ }
- if (!readlink_check(conn, dir, newname)) {
- DEBUG(2, ("Bad access attemt? %s is a symlink outside the share path", s));
- return(False);
+ /* Check for widelinks allowed. */
+ if (!lp_widelinks(SNUM(conn)) && (strncmp(conn->connectpath, resolved_name, con_path_len) != 0)) {
+ DEBUG(2, ("reduce_name: Bad access attempt: %s is a symlink outside the share path", fname));
+ if (free_resolved_name) {
+ SAFE_FREE(resolved_name);
}
-
- if (relative) {
- if (newname[l] == '/')
- pstrcpy(s,newname + l + 1);
- else
- pstrcpy(s,newname+l);
- } else
- pstrcpy(s,newname);
+ return NT_STATUS_ACCESS_DENIED;
}
- vfs_ChDir(conn,wd);
+ /* Check if we are allowing users to follow symlinks */
+ /* Patch from David Clerc <David.Clerc@cui.unige.ch>
+ University of Geneva */
- if (strlen(s) == 0)
- pstrcpy(s,"./");
-
- DEBUG(3,("reduced to %s\n",s));
- return(True);
+#ifdef S_ISLNK
+ if (!lp_symlinks(SNUM(conn))) {
+ SMB_STRUCT_STAT statbuf;
+ if ( (SMB_VFS_LSTAT(conn,fname,&statbuf) != -1) &&
+ (S_ISLNK(statbuf.st_mode)) ) {
+ if (free_resolved_name) {
+ SAFE_FREE(resolved_name);
+ }
+ DEBUG(3,("reduce_name: denied: file path name %s is a symlink\n",resolved_name));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ }
#endif
-}
+ DEBUG(3,("reduce_name: %s reduced to %s\n", fname, resolved_name));
+ if (free_resolved_name) {
+ SAFE_FREE(resolved_name);
+ }
+ return NT_STATUS_OK;
+}
git.samba.org / jra / samba / .git / blobdiff