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/>.
*/
#include "includes.h"
-
-static int real_max_open_files;
+#include "smbd/globals.h"
#define VALID_FNUM(fnum) (((fnum) >= 0) && ((fnum) < real_max_open_files))
#define FILE_HANDLE_OFFSET 0x1000
-static struct bitmap *file_bmap;
-
-static files_struct *Files;
-
-/* a fsp to use when chaining */
-static files_struct *chain_fsp = NULL;
-/* a fsp to use to save when breaking an oplock. */
-static files_struct *oplock_save_chain_fsp = NULL;
-
-static int files_used;
-
/****************************************************************************
Return a unique number identifying this fsp over the life of this pid.
****************************************************************************/
static unsigned long get_gen_count(void)
{
- static unsigned long file_gen_counter;
-
if ((++file_gen_counter) == 0)
return ++file_gen_counter;
return file_gen_counter;
Find first available file slot.
****************************************************************************/
-files_struct *file_new(connection_struct *conn)
+NTSTATUS file_new(struct smb_request *req, connection_struct *conn,
+ files_struct **result)
{
int i;
- static int first_file;
- files_struct *fsp, *next;
+ files_struct *fsp;
+ NTSTATUS status;
/* we want to give out file handles differently on each new
connection because of a common bug in MS clients where they try to
first_file = (sys_getpid() ^ (int)time(NULL)) % real_max_open_files;
}
+ /* TODO: Port the id-tree implementation from Samba4 */
+
i = bitmap_find(file_bmap, first_file);
if (i == -1) {
- /*
- * Before we give up, go through the open files
- * and see if there are any files opened with a
- * batch oplock. If so break the oplock and then
- * re-use that entry (if it becomes closed).
- * This may help as NT/95 clients tend to keep
- * files batch oplocked for quite a long time
- * after they have finished with them.
- */
- for (fsp=Files;fsp;fsp=next) {
- next=fsp->next;
- if (attempt_close_oplocked_file(fsp)) {
- return file_new(conn);
- }
- }
-
DEBUG(0,("ERROR! Out of file structures\n"));
- unix_ERR_class = ERRSRV;
- unix_ERR_code = ERRnofids;
- return NULL;
+ /* TODO: We have to unconditionally return a DOS error here,
+ * W2k3 even returns ERRDOS/ERRnofids for ntcreate&x with
+ * NTSTATUS negotiated */
+ return NT_STATUS_TOO_MANY_OPENED_FILES;
}
- fsp = (files_struct *)malloc(sizeof(*fsp));
+ /*
+ * Make a child of the connection_struct as an fsp can't exist
+ * indepenedent of a connection.
+ */
+ fsp = talloc_zero(conn, struct files_struct);
if (!fsp) {
- unix_ERR_class = ERRSRV;
- unix_ERR_code = ERRnofids;
- return NULL;
+ return NT_STATUS_NO_MEMORY;
}
- ZERO_STRUCTP(fsp);
- fsp->fd = -1;
+ /*
+ * This can't be a child of fsp because the file_handle can be ref'd
+ * when doing a dos/fcb open, which will then share the file_handle
+ * across multiple fsps.
+ */
+ fsp->fh = talloc_zero(conn, struct fd_handle);
+ if (!fsp->fh) {
+ TALLOC_FREE(fsp);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ fsp->fh->ref_count = 1;
+ fsp->fh->fd = -1;
+
fsp->conn = conn;
- fsp->file_id = get_gen_count();
+ fsp->fh->gen_id = get_gen_count();
GetTimeOfDay(&fsp->open_time);
first_file = (i+1) % real_max_open_files;
fsp->fnum = i + FILE_HANDLE_OFFSET;
SMB_ASSERT(fsp->fnum < 65536);
- string_set(&fsp->fsp_name,"");
-
+ /*
+ * Create an smb_filename with "" for the base_name. There are very
+ * few NULL checks, so make sure it's initialized with something. to
+ * be safe until an audit can be done.
+ */
+ status = create_synthetic_smb_fname(fsp, "", NULL, NULL,
+ &fsp->fsp_name);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(fsp);
+ TALLOC_FREE(fsp->fh);
+ }
+
DLIST_ADD(Files, fsp);
DEBUG(5,("allocated file structure %d, fnum = %d (%d used)\n",
i, fsp->fnum, files_used));
- chain_fsp = fsp;
-
- return fsp;
+ if (req != NULL) {
+ req->chain_fsp = fsp;
+ }
+
+ /* A new fsp invalidates the positive and
+ negative fsp_fi_cache as the new fsp is pushed
+ at the start of the list and we search from
+ a cache hit to the *end* of the list. */
+
+ ZERO_STRUCT(fsp_fi_cache);
+
+ conn->num_files_open++;
+
+ *result = fsp;
+ return NT_STATUS_OK;
}
/****************************************************************************
for (fsp=Files;fsp;fsp=next) {
next = fsp->next;
if (fsp->conn == conn) {
- close_file(fsp,False);
+ close_file(NULL, fsp, SHUTDOWN_CLOSE);
+ }
+ }
+}
+
+/****************************************************************************
+ Close all open files for a pid and a vuid.
+****************************************************************************/
+
+void file_close_pid(uint16 smbpid, int vuid)
+{
+ files_struct *fsp, *next;
+
+ for (fsp=Files;fsp;fsp=next) {
+ next = fsp->next;
+ if ((fsp->file_pid == smbpid) && (fsp->vuid == vuid)) {
+ close_file(NULL, fsp, SHUTDOWN_CLOSE);
}
}
}
if (!file_bmap) {
exit_server("out of memory in file_init");
}
-
- /*
- * Ensure that pipe_handle_oppset is set correctly.
- */
- set_pipe_handle_offset(real_max_open_files);
}
/****************************************************************************
for (fsp=Files;fsp;fsp=next) {
next=fsp->next;
if (fsp->vuid == vuid) {
- close_file(fsp,False);
+ close_file(NULL, fsp, SHUTDOWN_CLOSE);
}
}
}
+/*
+ * Walk the files table until "fn" returns non-NULL
+ */
+
+struct files_struct *file_walk_table(
+ struct files_struct *(*fn)(struct files_struct *fsp,
+ void *private_data),
+ void *private_data)
+{
+ struct files_struct *fsp, *next;
+
+ for (fsp = Files; fsp; fsp = next) {
+ struct files_struct *ret;
+ next = fsp->next;
+ ret = fn(fsp, private_data);
+ if (ret != NULL) {
+ return ret;
+ }
+ }
+ return NULL;
+}
+
+/****************************************************************************
+ Debug to enumerate all open files in the smbd.
+****************************************************************************/
+
+void file_dump_open_table(void)
+{
+ int count=0;
+ files_struct *fsp;
+
+ for (fsp=Files;fsp;fsp=fsp->next,count++) {
+ DEBUG(10,("Files[%d], fnum = %d, name %s, fd = %d, gen = %lu, "
+ "fileid=%s\n", count, fsp->fnum, fsp_str_dbg(fsp),
+ fsp->fh->fd, (unsigned long)fsp->fh->gen_id,
+ file_id_string_tos(&fsp->file_id)));
+ }
+}
+
/****************************************************************************
Find a fsp given a file descriptor.
****************************************************************************/
files_struct *fsp;
for (fsp=Files;fsp;fsp=fsp->next,count++) {
- if (fsp->fd == fd) {
+ if (fsp->fh->fd == fd) {
if (count > 10) {
DLIST_PROMOTE(Files, fsp);
}
Find a fsp given a device, inode and file_id.
****************************************************************************/
-files_struct *file_find_dif(SMB_DEV_T dev, SMB_INO_T inode, unsigned long file_id)
+files_struct *file_find_dif(struct file_id id, unsigned long gen_id)
{
int count=0;
files_struct *fsp;
for (fsp=Files;fsp;fsp=fsp->next,count++) {
- /* We can have a fsp->fd == -1 here as it could be a stat open. */
- if (fsp->dev == dev &&
- fsp->inode == inode &&
- fsp->file_id == file_id ) {
+ /* We can have a fsp->fh->fd == -1 here as it could be a stat open. */
+ if (file_id_equal(&fsp->file_id, &id) &&
+ fsp->fh->gen_id == gen_id ) {
if (count > 10) {
DLIST_PROMOTE(Files, fsp);
}
/* Paranoia check. */
- if (fsp->fd == -1 && fsp->oplock_type != NO_OPLOCK) {
- DEBUG(0,("file_find_dif: file %s dev = %x, inode = %.0f, file_id = %u \
-oplock_type = %u is a stat open with oplock type !\n", fsp->fsp_name, (unsigned int)fsp->dev,
- (double)fsp->inode, (unsigned int)fsp->file_id,
- (unsigned int)fsp->oplock_type ));
- smb_panic("file_find_dif\n");
+ if ((fsp->fh->fd == -1) &&
+ (fsp->oplock_type != NO_OPLOCK) &&
+ (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
+ DEBUG(0,("file_find_dif: file %s file_id = "
+ "%s, gen = %u oplock_type = %u is a "
+ "stat open with oplock type !\n",
+ fsp_str_dbg(fsp),
+ file_id_string_tos(&fsp->file_id),
+ (unsigned int)fsp->fh->gen_id,
+ (unsigned int)fsp->oplock_type ));
+ smb_panic("file_find_dif");
}
return fsp;
}
{
files_struct *fsp;
- for (fsp=Files;fsp;fsp=fsp->next) {
- if (fsp == orig_fsp)
- return fsp;
- }
+ for (fsp=Files;fsp;fsp=fsp->next) {
+ if (fsp == orig_fsp)
+ return fsp;
+ }
- return NULL;
+ return NULL;
}
/****************************************************************************
Find the first fsp given a device and inode.
+ We use a singleton cache here to speed up searching from getfilepathinfo
+ calls.
****************************************************************************/
-files_struct *file_find_di_first(SMB_DEV_T dev, SMB_INO_T inode)
+files_struct *file_find_di_first(struct file_id id)
{
- files_struct *fsp;
+ files_struct *fsp;
+
+ if (file_id_equal(&fsp_fi_cache.id, &id)) {
+ /* Positive or negative cache hit. */
+ return fsp_fi_cache.fsp;
+ }
- for (fsp=Files;fsp;fsp=fsp->next) {
- if ( fsp->fd != -1 &&
- fsp->dev == dev &&
- fsp->inode == inode )
- return fsp;
- }
+ fsp_fi_cache.id = id;
- return NULL;
+ for (fsp=Files;fsp;fsp=fsp->next) {
+ if (file_id_equal(&fsp->file_id, &id)) {
+ /* Setup positive cache. */
+ fsp_fi_cache.fsp = fsp;
+ return fsp;
+ }
+ }
+
+ /* Setup negative cache. */
+ fsp_fi_cache.fsp = NULL;
+ return NULL;
}
/****************************************************************************
files_struct *file_find_di_next(files_struct *start_fsp)
{
- files_struct *fsp;
+ files_struct *fsp;
- for (fsp = start_fsp->next;fsp;fsp=fsp->next) {
- if ( fsp->fd != -1 &&
- fsp->dev == start_fsp->dev &&
- fsp->inode == start_fsp->inode )
- return fsp;
- }
+ for (fsp = start_fsp->next;fsp;fsp=fsp->next) {
+ if (file_id_equal(&fsp->file_id, &start_fsp->file_id)) {
+ return fsp;
+ }
+ }
- return NULL;
+ return NULL;
}
/****************************************************************************
files_struct *fsp;
for (fsp=Files;fsp;fsp=fsp->next) {
- if (fsp->print_file) return fsp;
+ if (fsp->print_file) {
+ return fsp;
+ }
}
return NULL;
}
+/****************************************************************************
+ Find any fsp open with a pathname below that of an already open path.
+****************************************************************************/
+
+bool file_find_subpath(files_struct *dir_fsp)
+{
+ files_struct *fsp;
+ size_t dlen;
+ char *d_fullname;
+
+ d_fullname = talloc_asprintf(talloc_tos(), "%s/%s",
+ dir_fsp->conn->connectpath,
+ dir_fsp->fsp_name->base_name);
+
+ if (!d_fullname) {
+ return false;
+ }
+
+ dlen = strlen(d_fullname);
+
+ for (fsp=Files;fsp;fsp=fsp->next) {
+ char *d1_fullname;
+
+ if (fsp == dir_fsp) {
+ continue;
+ }
+
+ d1_fullname = talloc_asprintf(talloc_tos(),
+ "%s/%s",
+ fsp->conn->connectpath,
+ fsp->fsp_name->base_name);
+
+ if (strnequal(d_fullname, d1_fullname, dlen)) {
+ TALLOC_FREE(d_fullname);
+ TALLOC_FREE(d1_fullname);
+ return true;
+ }
+ TALLOC_FREE(d1_fullname);
+ }
+
+ TALLOC_FREE(d_fullname);
+ return false;
+}
+
/****************************************************************************
Sync open files on a connection.
****************************************************************************/
for (fsp=Files;fsp;fsp=next) {
next=fsp->next;
- if ((conn == fsp->conn) && (fsp->fd != -1)) {
- sync_file(conn,fsp);
+ if ((conn == fsp->conn) && (fsp->fh->fd != -1)) {
+ sync_file(conn, fsp, True /* write through */);
}
}
}
Free up a fsp.
****************************************************************************/
-void file_free(files_struct *fsp)
+void file_free(struct smb_request *req, files_struct *fsp)
{
DLIST_REMOVE(Files, fsp);
- string_free(&fsp->fsp_name);
+ TALLOC_FREE(fsp->fake_file_handle);
+
+ if (fsp->fh->ref_count == 1) {
+ TALLOC_FREE(fsp->fh);
+ } else {
+ fsp->fh->ref_count--;
+ }
+
+ if (fsp->notify) {
+ if (fsp->is_directory) {
+ notify_remove_onelevel(fsp->conn->notify_ctx,
+ &fsp->file_id, fsp);
+ }
+ notify_remove(fsp->conn->notify_ctx, fsp);
+ TALLOC_FREE(fsp->notify);
+ }
+
+ /* Ensure this event will never fire. */
+ TALLOC_FREE(fsp->oplock_timeout);
+
+ /* Ensure this event will never fire. */
+ TALLOC_FREE(fsp->update_write_time_event);
bitmap_clear(file_bmap, fsp->fnum - FILE_HANDLE_OFFSET);
files_used--;
DEBUG(5,("freed files structure %d (%d used)\n",
fsp->fnum, files_used));
- /* this is paranoia, just in case someone tries to reuse the
+ fsp->conn->num_files_open--;
+
+ if ((req != NULL) && (fsp == req->chain_fsp)) {
+ req->chain_fsp = NULL;
+ }
+
+ /* Closing a file can invalidate the positive cache. */
+ if (fsp == fsp_fi_cache.fsp) {
+ ZERO_STRUCT(fsp_fi_cache);
+ }
+
+ /* Drop all remaining extensions. */
+ while (fsp->vfs_extension) {
+ vfs_remove_fsp_extension(fsp->vfs_extension->owner, fsp);
+ }
+
+ /* this is paranoia, just in case someone tries to reuse the
information */
ZERO_STRUCTP(fsp);
- if (fsp == chain_fsp) chain_fsp = NULL;
-
- SAFE_FREE(fsp);
+ /* fsp->fsp_name is a talloc child and is free'd automatically. */
+ TALLOC_FREE(fsp);
}
/****************************************************************************
- Get a fsp from a packet given the offset of a 16 bit fnum.
+ Get an fsp from a 16 bit fnum.
****************************************************************************/
-files_struct *file_fsp(char *buf, int where)
+files_struct *file_fnum(uint16 fnum)
{
- int fnum, count=0;
files_struct *fsp;
-
- if (chain_fsp)
- return chain_fsp;
-
- fnum = SVAL(buf, where);
+ int count=0;
for (fsp=Files;fsp;fsp=fsp->next, count++) {
if (fsp->fnum == fnum) {
- chain_fsp = fsp;
if (count > 10) {
DLIST_PROMOTE(Files, fsp);
}
}
/****************************************************************************
- Reset the chained fsp - done at the start of a packet reply.
+ Get an fsp from a packet given the offset of a 16 bit fnum.
****************************************************************************/
-void file_chain_reset(void)
+files_struct *file_fsp(struct smb_request *req, uint16 fid)
{
- chain_fsp = NULL;
+ files_struct *fsp;
+
+ if ((req != NULL) && (req->chain_fsp != NULL)) {
+ return req->chain_fsp;
+ }
+
+ fsp = file_fnum(fid);
+ if ((fsp != NULL) && (req != NULL)) {
+ req->chain_fsp = fsp;
+ }
+ return fsp;
}
/****************************************************************************
-Save the chained fsp - done when about to do an oplock break.
+ Duplicate the file handle part for a DOS or FCB open.
****************************************************************************/
-void file_chain_save(void)
+NTSTATUS dup_file_fsp(struct smb_request *req, files_struct *from,
+ uint32 access_mask, uint32 share_access,
+ uint32 create_options, files_struct *to)
{
- oplock_save_chain_fsp = chain_fsp;
+ TALLOC_FREE(to->fh);
+
+ to->fh = from->fh;
+ to->fh->ref_count++;
+
+ to->file_id = from->file_id;
+ to->initial_allocation_size = from->initial_allocation_size;
+ to->mode = from->mode;
+ to->file_pid = from->file_pid;
+ to->vuid = from->vuid;
+ to->open_time = from->open_time;
+ to->access_mask = access_mask;
+ to->share_access = share_access;
+ to->oplock_type = from->oplock_type;
+ to->can_lock = from->can_lock;
+ to->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
+ if (!CAN_WRITE(from->conn)) {
+ to->can_write = False;
+ } else {
+ to->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ? True : False;
+ }
+ to->print_file = from->print_file;
+ to->modified = from->modified;
+ to->is_directory = from->is_directory;
+ to->aio_write_behind = from->aio_write_behind;
+ return fsp_set_smb_fname(to, from->fsp_name);
}
-/****************************************************************************
-Restore the chained fsp - done after an oplock break.
-****************************************************************************/
+/**
+ * Return a debug string using the debug_ctx(). This can only be called from
+ * DEBUG() macros due to the debut_ctx().
+ */
+const char *fsp_str_dbg(const struct files_struct *fsp)
+{
+ return smb_fname_str_dbg(fsp->fsp_name);
+}
-void file_chain_restore(void)
+/**
+ * The only way that the fsp->fsp_name field should ever be set.
+ */
+NTSTATUS fsp_set_smb_fname(struct files_struct *fsp,
+ const struct smb_filename *smb_fname_in)
{
- chain_fsp = oplock_save_chain_fsp;
+ NTSTATUS status;
+ struct smb_filename *smb_fname_new;
+
+ status = copy_smb_filename(fsp, smb_fname_in, &smb_fname_new);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ TALLOC_FREE(fsp->fsp_name);
+ fsp->fsp_name = smb_fname_new;
+
+ return NT_STATUS_OK;
}
git.samba.org / samba.git / blobdiff