Unix SMB/CIFS implementation.
Files[] structure handling
Copyright (C) Andrew Tridgell 1998
-
+
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 3 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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, 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;
-
-static int files_used;
-
-/* A singleton cache to speed up searching by dev/inode. */
-static struct fsp_singleton_cache {
- files_struct *fsp;
- struct file_id id;
-} fsp_fi_cache;
-
/****************************************************************************
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.
****************************************************************************/
-NTSTATUS file_new(connection_struct *conn, files_struct **result)
+NTSTATUS file_new(struct smb_request *req, connection_struct *conn,
+ files_struct **result)
{
int i;
- static int first_file;
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
return NT_STATUS_TOO_MANY_OPENED_FILES;
}
- fsp = SMB_MALLOC_P(files_struct);
+ /*
+ * Make a child of the connection_struct as an fsp can't exist
+ * independent of a connection.
+ */
+ fsp = talloc_zero(conn, struct files_struct);
if (!fsp) {
return NT_STATUS_NO_MEMORY;
}
- ZERO_STRUCTP(fsp);
-
- fsp->fh = SMB_MALLOC_P(struct fd_handle);
+ /*
+ * 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) {
- SAFE_FREE(fsp);
+ TALLOC_FREE(fsp);
return NT_STATUS_NO_MEMORY;
}
- ZERO_STRUCTP(fsp->fh);
-
fsp->fh->ref_count = 1;
fsp->fh->fd = -1;
fsp->fnum = i + FILE_HANDLE_OFFSET;
SMB_ASSERT(fsp->fnum < 65536);
- string_set(&fsp->fsp_name,"");
-
- DLIST_ADD(Files, fsp);
+ /*
+ * 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(conn->sconn->files, fsp);
DEBUG(5,("allocated file structure %d, fnum = %d (%d used)\n",
i, fsp->fnum, files_used));
- chain_fsp = 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
ZERO_STRUCT(fsp_fi_cache);
+ conn->num_files_open++;
+
*result = fsp;
return NT_STATUS_OK;
}
void file_close_conn(connection_struct *conn)
{
files_struct *fsp, *next;
-
- for (fsp=Files;fsp;fsp=next) {
+
+ for (fsp=conn->sconn->files; fsp; fsp=next) {
next = fsp->next;
if (fsp->conn == conn) {
- close_file(fsp,SHUTDOWN_CLOSE);
+ close_file(NULL, fsp, SHUTDOWN_CLOSE);
}
}
}
Close all open files for a pid and a vuid.
****************************************************************************/
-void file_close_pid(uint16 smbpid, int vuid)
+void file_close_pid(struct smbd_server_connection *sconn, uint16 smbpid,
+ int vuid)
{
files_struct *fsp, *next;
-
- for (fsp=Files;fsp;fsp=next) {
+
+ for (fsp=sconn->files;fsp;fsp=next) {
next = fsp->next;
if ((fsp->file_pid == smbpid) && (fsp->vuid == vuid)) {
- close_file(fsp,SHUTDOWN_CLOSE);
+ close_file(NULL, fsp, SHUTDOWN_CLOSE);
}
}
}
Initialise file structures.
****************************************************************************/
-#define MAX_OPEN_FUDGEFACTOR 20
-
void file_init(void)
{
int request_max_open_files = lp_max_open_files();
real_max_open_files = 65536 - FILE_HANDLE_OFFSET - MAX_OPEN_PIPES;
if(real_max_open_files != request_max_open_files) {
- DEBUG(1,("file_init: Information only: requested %d \
-open files, %d are available.\n", request_max_open_files, real_max_open_files));
+ DEBUG(1, ("file_init: Information only: requested %d "
+ "open files, %d are available.\n",
+ request_max_open_files, real_max_open_files));
}
SMB_ASSERT(real_max_open_files > 100);
- file_bmap = bitmap_allocate(real_max_open_files);
-
+ file_bmap = bitmap_talloc(talloc_autofree_context(),
+ real_max_open_files);
+
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);
}
/****************************************************************************
Close files open by a specified vuid.
****************************************************************************/
-void file_close_user(int vuid)
+void file_close_user(struct smbd_server_connection *sconn, int vuid)
{
files_struct *fsp, *next;
- for (fsp=Files;fsp;fsp=next) {
+ for (fsp=sconn->files; fsp; fsp=next) {
next=fsp->next;
if (fsp->vuid == vuid) {
- close_file(fsp,SHUTDOWN_CLOSE);
+ close_file(NULL, fsp, SHUTDOWN_CLOSE);
}
}
}
-/****************************************************************************
- Debug to enumerate all open files in the smbd.
-****************************************************************************/
+/*
+ * Walk the files table until "fn" returns non-NULL
+ */
-void file_dump_open_table(void)
+struct files_struct *files_forall(
+ struct smbd_server_connection *sconn,
+ struct files_struct *(*fn)(struct files_struct *fsp,
+ void *private_data),
+ void *private_data)
{
- int count=0;
- files_struct *fsp;
+ struct files_struct *fsp, *next;
- 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->fsp_name, fsp->fh->fd, (unsigned long)fsp->fh->gen_id,
- file_id_string_tos(&fsp->file_id)));
+ for (fsp = sconn->files; fsp; fsp = next) {
+ struct files_struct *ret;
+ next = fsp->next;
+ ret = fn(fsp, private_data);
+ if (ret != NULL) {
+ return ret;
+ }
}
+ return NULL;
}
/****************************************************************************
int count=0;
files_struct *fsp;
- for (fsp=Files;fsp;fsp=fsp->next,count++) {
+ for (fsp=smbd_server_conn->files;fsp;fsp=fsp->next,count++) {
if (fsp->fh->fd == fd) {
if (count > 10) {
- DLIST_PROMOTE(Files, fsp);
+ DLIST_PROMOTE(smbd_server_conn->files, fsp);
}
return fsp;
}
Find a fsp given a device, inode and file_id.
****************************************************************************/
-files_struct *file_find_dif(struct file_id id, unsigned long gen_id)
+files_struct *file_find_dif(struct smbd_server_connection *sconn,
+ struct file_id id, unsigned long gen_id)
{
int count=0;
files_struct *fsp;
- for (fsp=Files;fsp;fsp=fsp->next,count++) {
+ for (fsp=sconn->files; fsp; fsp=fsp->next,count++) {
/* 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);
+ DLIST_PROMOTE(sconn->files, fsp);
}
/* Paranoia check. */
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->fsp_name,
+ 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 ));
return NULL;
}
-/****************************************************************************
- Check if an fsp still exists.
-****************************************************************************/
-
-files_struct *file_find_fsp(files_struct *orig_fsp)
-{
- files_struct *fsp;
-
- for (fsp=Files;fsp;fsp=fsp->next) {
- if (fsp == orig_fsp)
- return fsp;
- }
-
- 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(struct file_id id)
+files_struct *file_find_di_first(struct smbd_server_connection *sconn,
+ struct file_id id)
{
files_struct *fsp;
fsp_fi_cache.id = id;
- for (fsp=Files;fsp;fsp=fsp->next) {
+ for (fsp=sconn->files;fsp;fsp=fsp->next) {
if (file_id_equal(&fsp->file_id, &id)) {
/* Setup positive cache. */
fsp_fi_cache.fsp = fsp;
}
/****************************************************************************
- Find a fsp that is open for printing.
+ Find any fsp open with a pathname below that of an already open path.
****************************************************************************/
-files_struct *file_find_print(void)
+bool file_find_subpath(files_struct *dir_fsp)
{
files_struct *fsp;
+ size_t dlen;
+ char *d_fullname = NULL;
- for (fsp=Files;fsp;fsp=fsp->next) {
- if (fsp->print_file) {
- return fsp;
+ 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=dir_fsp->conn->sconn->files; fsp; fsp=fsp->next) {
+ char *d1_fullname;
+
+ if (fsp == dir_fsp) {
+ continue;
}
- }
- return NULL;
+ d1_fullname = talloc_asprintf(talloc_tos(),
+ "%s/%s",
+ fsp->conn->connectpath,
+ fsp->fsp_name->base_name);
+
+ /*
+ * If the open file has a path that is a longer
+ * component, then it's a subpath.
+ */
+ if (strnequal(d_fullname, d1_fullname, dlen) &&
+ (d1_fullname[dlen] == '/')) {
+ TALLOC_FREE(d1_fullname);
+ TALLOC_FREE(d_fullname);
+ return true;
+ }
+ TALLOC_FREE(d1_fullname);
+ }
+
+ TALLOC_FREE(d_fullname);
+ return false;
}
/****************************************************************************
{
files_struct *fsp, *next;
- for (fsp=Files;fsp;fsp=next) {
+ for (fsp=conn->sconn->files; fsp; fsp=next) {
next=fsp->next;
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);
+ DLIST_REMOVE(fsp->conn->sconn->files, fsp);
TALLOC_FREE(fsp->fake_file_handle);
if (fsp->fh->ref_count == 1) {
- SAFE_FREE(fsp->fh);
+ 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);
}
DEBUG(5,("freed files structure %d (%d used)\n",
fsp->fnum, files_used));
- /* this is paranoia, just in case someone tries to reuse the
- information */
- ZERO_STRUCTP(fsp);
+ fsp->conn->num_files_open--;
- if (fsp == chain_fsp) {
- chain_fsp = NULL;
+ if ((req != NULL) && (fsp == req->chain_fsp)) {
+ req->chain_fsp = NULL;
+ }
+
+ /*
+ * Clear all possible chained fsp
+ * pointers in the SMB2 request queue.
+ */
+ if (req != NULL && req->smb2req) {
+ remove_smb2_chained_fsp(fsp);
}
/* Closing a file can invalidate the positive cache. */
vfs_remove_fsp_extension(fsp->vfs_extension->owner, fsp);
}
- SAFE_FREE(fsp);
+ /* this is paranoia, just in case someone tries to reuse the
+ information */
+ ZERO_STRUCTP(fsp);
+
+ /* fsp->fsp_name is a talloc child and is free'd automatically. */
+ TALLOC_FREE(fsp);
}
/****************************************************************************
Get an fsp from a 16 bit fnum.
****************************************************************************/
-files_struct *file_fnum(uint16 fnum)
+static struct files_struct *file_fnum(struct smbd_server_connection *sconn,
+ uint16 fnum)
{
files_struct *fsp;
int count=0;
- for (fsp=Files;fsp;fsp=fsp->next, count++) {
+ for (fsp=sconn->files; fsp; fsp=fsp->next, count++) {
if (fsp->fnum == fnum) {
if (count > 10) {
- DLIST_PROMOTE(Files, fsp);
+ DLIST_PROMOTE(sconn->files, fsp);
}
return fsp;
}
}
/****************************************************************************
- Get an fsp from a packet given the offset of a 16 bit fnum.
+ Get an fsp from a packet given a 16 bit fnum.
****************************************************************************/
-files_struct *file_fsp(uint16 fid)
+files_struct *file_fsp(struct smb_request *req, uint16 fid)
{
files_struct *fsp;
- if (chain_fsp) {
- return chain_fsp;
+ if (req == NULL) {
+ /*
+ * We should never get here. req==NULL could in theory
+ * only happen from internal opens with a non-zero
+ * root_dir_fid. Internal opens just don't do that, at
+ * least they are not supposed to do so. And if they
+ * start to do so, they better fake up a smb_request
+ * from which we get the right smbd_server_conn. While
+ * this should never happen, let's return NULL here.
+ */
+ return NULL;
}
- fsp = file_fnum(fid);
- if (fsp) {
- chain_fsp = fsp;
+ if (req->chain_fsp != NULL) {
+ return req->chain_fsp;
+ }
+
+ fsp = file_fnum(req->sconn, fid);
+ if (fsp != NULL) {
+ req->chain_fsp = fsp;
}
return fsp;
}
/****************************************************************************
- Reset the chained fsp - done at the start of a packet reply.
+ Duplicate the file handle part for a DOS or FCB open.
****************************************************************************/
-void file_chain_reset(void)
+NTSTATUS dup_file_fsp(struct smb_request *req, files_struct *from,
+ uint32 access_mask, uint32 share_access,
+ uint32 create_options, files_struct *to)
{
- chain_fsp = NULL;
-}
+ 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->modified = from->modified;
+ to->is_directory = from->is_directory;
+ to->aio_write_behind = from->aio_write_behind;
+
+ if (from->print_file) {
+ to->print_file = talloc(to, struct print_file_data);
+ if (!to->print_file) return NT_STATUS_NO_MEMORY;
+ to->print_file->rap_jobid = from->print_file->rap_jobid;
+ } else {
+ to->print_file = NULL;
+ }
-/****************************************************************************
- Duplicate the file handle part for a DOS or FCB open.
-****************************************************************************/
+ return fsp_set_smb_fname(to, from->fsp_name);
+}
-NTSTATUS dup_file_fsp(files_struct *fsp,
- uint32 access_mask,
- uint32 share_access,
- uint32 create_options,
- files_struct **result)
+/**
+ * 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)
{
NTSTATUS status;
- files_struct *dup_fsp;
-
- status = file_new(fsp->conn, &dup_fsp);
+ 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;
}
- SAFE_FREE(dup_fsp->fh);
-
- dup_fsp->fh = fsp->fh;
- dup_fsp->fh->ref_count++;
-
- dup_fsp->file_id = fsp->file_id;
- dup_fsp->initial_allocation_size = fsp->initial_allocation_size;
- dup_fsp->mode = fsp->mode;
- dup_fsp->file_pid = fsp->file_pid;
- dup_fsp->vuid = fsp->vuid;
- dup_fsp->open_time = fsp->open_time;
- dup_fsp->access_mask = access_mask;
- dup_fsp->share_access = share_access;
- dup_fsp->oplock_type = fsp->oplock_type;
- dup_fsp->can_lock = fsp->can_lock;
- dup_fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
- if (!CAN_WRITE(fsp->conn)) {
- dup_fsp->can_write = False;
- } else {
- dup_fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ? True : False;
- }
- dup_fsp->print_file = fsp->print_file;
- dup_fsp->modified = fsp->modified;
- dup_fsp->is_directory = fsp->is_directory;
- dup_fsp->aio_write_behind = fsp->aio_write_behind;
- string_set(&dup_fsp->fsp_name,fsp->fsp_name);
+ TALLOC_FREE(fsp->fsp_name);
+ fsp->fsp_name = smb_fname_new;
- *result = dup_fsp;
return NT_STATUS_OK;
}
git.samba.org / kai / samba.git / blobdiff