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https://github.com/samba-team/samba.git
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e60cc280d6
Signed-off-by: Richard Sharpe <rsharpe@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
937 lines
22 KiB
C
937 lines
22 KiB
C
/*
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* Store streams in a separate subdirectory
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*
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* Copyright (C) Volker Lendecke, 2007
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "smbd/smbd.h"
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#include "system/filesys.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_VFS
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/*
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* Excerpt from a mail from tridge:
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*
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* Volker, what I'm thinking of is this:
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* /mount-point/.streams/XX/YY/aaaa.bbbb/namedstream1
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* /mount-point/.streams/XX/YY/aaaa.bbbb/namedstream2
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*
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* where XX/YY is a 2 level hash based on the fsid/inode. "aaaa.bbbb"
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* is the fsid/inode. "namedstreamX" is a file named after the stream
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* name.
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*/
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static uint32_t hash_fn(DATA_BLOB key)
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{
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uint32_t value; /* Used to compute the hash value. */
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uint32_t i; /* Used to cycle through random values. */
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/* Set the initial value from the key size. */
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for (value = 0x238F13AF * key.length, i=0; i < key.length; i++)
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value = (value + (key.data[i] << (i*5 % 24)));
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return (1103515243 * value + 12345);
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}
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/*
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* With the hashing scheme based on the inode we need to protect against
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* streams showing up on files with re-used inodes. This can happen if we
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* create a stream directory from within Samba, and a local process or NFS
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* client deletes the file without deleting the streams directory. When the
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* inode is re-used and the stream directory is still around, the streams in
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* there would be show up as belonging to the new file.
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*
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* There are several workarounds for this, probably the easiest one is on
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* systems which have a true birthtime stat element: When the file has a later
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* birthtime than the streams directory, then we have to recreate the
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* directory.
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*
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* The other workaround is to somehow mark the file as generated by Samba with
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* something that a NFS client would not do. The closest one is a special
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* xattr value being set. On systems which do not support xattrs, it might be
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* an option to put in a special ACL entry for a non-existing group.
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*/
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static bool file_is_valid(vfs_handle_struct *handle, const char *path)
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{
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char buf;
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DEBUG(10, ("file_is_valid (%s) called\n", path));
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if (SMB_VFS_GETXATTR(handle->conn, path, SAMBA_XATTR_MARKER,
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&buf, sizeof(buf)) != sizeof(buf)) {
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DEBUG(10, ("GETXATTR failed: %s\n", strerror(errno)));
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return false;
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}
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if (buf != '1') {
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DEBUG(10, ("got wrong buffer content: '%c'\n", buf));
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return false;
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}
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return true;
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}
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static bool mark_file_valid(vfs_handle_struct *handle, const char *path)
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{
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char buf = '1';
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int ret;
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DEBUG(10, ("marking file %s as valid\n", path));
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ret = SMB_VFS_SETXATTR(handle->conn, path, SAMBA_XATTR_MARKER,
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&buf, sizeof(buf), 0);
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if (ret == -1) {
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DEBUG(10, ("SETXATTR failed: %s\n", strerror(errno)));
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return false;
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}
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return true;
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}
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/**
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* Given an smb_filename, determine the stream directory using the file's
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* base_name.
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*/
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static char *stream_dir(vfs_handle_struct *handle,
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const struct smb_filename *smb_fname,
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const SMB_STRUCT_STAT *base_sbuf, bool create_it)
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{
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uint32_t hash;
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struct smb_filename *smb_fname_hash = NULL;
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char *result = NULL;
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SMB_STRUCT_STAT base_sbuf_tmp;
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uint8_t first, second;
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char *tmp;
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char *id_hex;
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struct file_id id;
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uint8_t id_buf[16];
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bool check_valid;
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const char *rootdir;
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check_valid = lp_parm_bool(SNUM(handle->conn),
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"streams_depot", "check_valid", true);
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tmp = talloc_asprintf(talloc_tos(), "%s/.streams", handle->conn->cwd);
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if (tmp == NULL) {
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errno = ENOMEM;
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goto fail;
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}
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rootdir = lp_parm_const_string(
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SNUM(handle->conn), "streams_depot", "directory",
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tmp);
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/* Stat the base file if it hasn't already been done. */
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if (base_sbuf == NULL) {
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struct smb_filename *smb_fname_base;
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smb_fname_base = synthetic_smb_fname(
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talloc_tos(), smb_fname->base_name, NULL, NULL);
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if (smb_fname_base == NULL) {
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errno = ENOMEM;
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goto fail;
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}
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if (SMB_VFS_NEXT_STAT(handle, smb_fname_base) == -1) {
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TALLOC_FREE(smb_fname_base);
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goto fail;
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}
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base_sbuf_tmp = smb_fname_base->st;
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TALLOC_FREE(smb_fname_base);
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} else {
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base_sbuf_tmp = *base_sbuf;
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}
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id = SMB_VFS_FILE_ID_CREATE(handle->conn, &base_sbuf_tmp);
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push_file_id_16((char *)id_buf, &id);
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hash = hash_fn(data_blob_const(id_buf, sizeof(id_buf)));
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first = hash & 0xff;
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second = (hash >> 8) & 0xff;
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id_hex = hex_encode_talloc(talloc_tos(), id_buf, sizeof(id_buf));
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if (id_hex == NULL) {
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errno = ENOMEM;
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goto fail;
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}
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result = talloc_asprintf(talloc_tos(), "%s/%2.2X/%2.2X/%s", rootdir,
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first, second, id_hex);
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TALLOC_FREE(id_hex);
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if (result == NULL) {
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errno = ENOMEM;
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return NULL;
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}
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smb_fname_hash = synthetic_smb_fname(talloc_tos(), result, NULL, NULL);
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if (smb_fname_hash == NULL) {
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errno = ENOMEM;
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goto fail;
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}
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if (SMB_VFS_NEXT_STAT(handle, smb_fname_hash) == 0) {
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struct smb_filename *smb_fname_new = NULL;
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char *newname;
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bool delete_lost;
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if (!S_ISDIR(smb_fname_hash->st.st_ex_mode)) {
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errno = EINVAL;
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goto fail;
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}
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if (!check_valid ||
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file_is_valid(handle, smb_fname->base_name)) {
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return result;
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}
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/*
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* Someone has recreated a file under an existing inode
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* without deleting the streams directory.
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* Move it away or remove if streams_depot:delete_lost is set.
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*/
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again:
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delete_lost = lp_parm_bool(SNUM(handle->conn), "streams_depot",
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"delete_lost", false);
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if (delete_lost) {
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DEBUG(3, ("Someone has recreated a file under an "
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"existing inode. Removing: %s\n",
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smb_fname_hash->base_name));
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recursive_rmdir(talloc_tos(), handle->conn,
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smb_fname_hash);
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SMB_VFS_NEXT_RMDIR(handle, smb_fname_hash->base_name);
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} else {
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newname = talloc_asprintf(talloc_tos(), "lost-%lu",
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random());
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DEBUG(3, ("Someone has recreated a file under an "
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"existing inode. Renaming: %s to: %s\n",
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smb_fname_hash->base_name,
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newname));
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if (newname == NULL) {
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errno = ENOMEM;
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goto fail;
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}
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smb_fname_new = synthetic_smb_fname(
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talloc_tos(), newname, NULL, NULL);
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TALLOC_FREE(newname);
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if (smb_fname_new == NULL) {
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errno = ENOMEM;
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goto fail;
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}
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if (SMB_VFS_NEXT_RENAME(handle, smb_fname_hash,
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smb_fname_new) == -1) {
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TALLOC_FREE(smb_fname_new);
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if ((errno == EEXIST) || (errno == ENOTEMPTY)) {
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goto again;
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}
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goto fail;
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}
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TALLOC_FREE(smb_fname_new);
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}
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}
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if (!create_it) {
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errno = ENOENT;
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goto fail;
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}
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if ((SMB_VFS_NEXT_MKDIR(handle, rootdir, 0755) != 0)
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&& (errno != EEXIST)) {
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goto fail;
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}
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tmp = talloc_asprintf(result, "%s/%2.2X", rootdir, first);
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if (tmp == NULL) {
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errno = ENOMEM;
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goto fail;
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}
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if ((SMB_VFS_NEXT_MKDIR(handle, tmp, 0755) != 0)
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&& (errno != EEXIST)) {
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goto fail;
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}
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TALLOC_FREE(tmp);
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tmp = talloc_asprintf(result, "%s/%2.2X/%2.2X", rootdir, first,
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second);
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if (tmp == NULL) {
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errno = ENOMEM;
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goto fail;
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}
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if ((SMB_VFS_NEXT_MKDIR(handle, tmp, 0755) != 0)
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&& (errno != EEXIST)) {
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goto fail;
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}
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TALLOC_FREE(tmp);
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if ((SMB_VFS_NEXT_MKDIR(handle, result, 0755) != 0)
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&& (errno != EEXIST)) {
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goto fail;
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}
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if (check_valid && !mark_file_valid(handle, smb_fname->base_name)) {
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goto fail;
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}
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TALLOC_FREE(smb_fname_hash);
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return result;
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fail:
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TALLOC_FREE(smb_fname_hash);
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TALLOC_FREE(result);
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return NULL;
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}
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/**
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* Given a stream name, populate smb_fname_out with the actual location of the
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* stream.
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*/
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static NTSTATUS stream_smb_fname(vfs_handle_struct *handle,
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const struct smb_filename *smb_fname,
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struct smb_filename **smb_fname_out,
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bool create_dir)
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{
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char *dirname, *stream_fname;
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const char *stype;
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NTSTATUS status;
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*smb_fname_out = NULL;
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stype = strchr_m(smb_fname->stream_name + 1, ':');
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if (stype) {
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if (strcasecmp_m(stype, ":$DATA") != 0) {
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return NT_STATUS_INVALID_PARAMETER;
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}
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}
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dirname = stream_dir(handle, smb_fname, NULL, create_dir);
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if (dirname == NULL) {
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status = map_nt_error_from_unix(errno);
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goto fail;
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}
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stream_fname = talloc_asprintf(talloc_tos(), "%s/%s", dirname,
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smb_fname->stream_name);
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if (stream_fname == NULL) {
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status = NT_STATUS_NO_MEMORY;
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goto fail;
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}
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if (stype == NULL) {
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/* Append an explicit stream type if one wasn't specified. */
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stream_fname = talloc_asprintf(talloc_tos(), "%s:$DATA",
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stream_fname);
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if (stream_fname == NULL) {
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status = NT_STATUS_NO_MEMORY;
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goto fail;
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}
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} else {
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/* Normalize the stream type to upercase. */
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if (!strupper_m(strrchr_m(stream_fname, ':') + 1)) {
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status = NT_STATUS_INVALID_PARAMETER;
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goto fail;
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}
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}
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DEBUG(10, ("stream filename = %s\n", stream_fname));
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/* Create an smb_filename with stream_name == NULL. */
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*smb_fname_out = synthetic_smb_fname(
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talloc_tos(), stream_fname, NULL, NULL);
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if (*smb_fname_out == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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return NT_STATUS_OK;
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fail:
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DEBUG(5, ("stream_name failed: %s\n", strerror(errno)));
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TALLOC_FREE(*smb_fname_out);
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return status;
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}
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static NTSTATUS walk_streams(vfs_handle_struct *handle,
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struct smb_filename *smb_fname_base,
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char **pdirname,
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bool (*fn)(const char *dirname,
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const char *dirent,
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void *private_data),
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void *private_data)
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{
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char *dirname;
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DIR *dirhandle = NULL;
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const char *dirent = NULL;
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char *talloced = NULL;
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dirname = stream_dir(handle, smb_fname_base, &smb_fname_base->st,
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false);
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if (dirname == NULL) {
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if (errno == ENOENT) {
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/*
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* no stream around
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*/
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return NT_STATUS_OK;
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}
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return map_nt_error_from_unix(errno);
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}
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DEBUG(10, ("walk_streams: dirname=%s\n", dirname));
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dirhandle = SMB_VFS_NEXT_OPENDIR(handle, dirname, NULL, 0);
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if (dirhandle == NULL) {
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TALLOC_FREE(dirname);
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return map_nt_error_from_unix(errno);
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}
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while ((dirent = vfs_readdirname(handle->conn, dirhandle, NULL,
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&talloced)) != NULL) {
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if (ISDOT(dirent) || ISDOTDOT(dirent)) {
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TALLOC_FREE(talloced);
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continue;
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}
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DEBUG(10, ("walk_streams: dirent=%s\n", dirent));
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if (!fn(dirname, dirent, private_data)) {
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TALLOC_FREE(talloced);
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break;
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}
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TALLOC_FREE(talloced);
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}
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SMB_VFS_NEXT_CLOSEDIR(handle, dirhandle);
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if (pdirname != NULL) {
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*pdirname = dirname;
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}
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else {
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TALLOC_FREE(dirname);
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}
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return NT_STATUS_OK;
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}
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/**
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* Helper to stat/lstat the base file of an smb_fname. This will actually
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* fills in the stat struct in smb_filename.
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*/
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static int streams_depot_stat_base(vfs_handle_struct *handle,
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struct smb_filename *smb_fname,
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bool follow_links)
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{
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char *tmp_stream_name;
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int result;
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tmp_stream_name = smb_fname->stream_name;
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smb_fname->stream_name = NULL;
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if (follow_links) {
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result = SMB_VFS_NEXT_STAT(handle, smb_fname);
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} else {
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result = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
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}
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smb_fname->stream_name = tmp_stream_name;
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return result;
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}
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static int streams_depot_stat(vfs_handle_struct *handle,
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struct smb_filename *smb_fname)
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{
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struct smb_filename *smb_fname_stream = NULL;
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NTSTATUS status;
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int ret = -1;
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DEBUG(10, ("streams_depot_stat called for [%s]\n",
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smb_fname_str_dbg(smb_fname)));
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if (!is_ntfs_stream_smb_fname(smb_fname)) {
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return SMB_VFS_NEXT_STAT(handle, smb_fname);
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}
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/* If the default stream is requested, just stat the base file. */
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if (is_ntfs_default_stream_smb_fname(smb_fname)) {
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return streams_depot_stat_base(handle, smb_fname, true);
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}
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/* Stat the actual stream now. */
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status = stream_smb_fname(handle, smb_fname, &smb_fname_stream,
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false);
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if (!NT_STATUS_IS_OK(status)) {
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ret = -1;
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errno = map_errno_from_nt_status(status);
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goto done;
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}
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ret = SMB_VFS_NEXT_STAT(handle, smb_fname_stream);
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/* Update the original smb_fname with the stat info. */
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smb_fname->st = smb_fname_stream->st;
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done:
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TALLOC_FREE(smb_fname_stream);
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return ret;
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}
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static int streams_depot_lstat(vfs_handle_struct *handle,
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struct smb_filename *smb_fname)
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{
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struct smb_filename *smb_fname_stream = NULL;
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NTSTATUS status;
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int ret = -1;
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DEBUG(10, ("streams_depot_lstat called for [%s]\n",
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smb_fname_str_dbg(smb_fname)));
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if (!is_ntfs_stream_smb_fname(smb_fname)) {
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return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
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}
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|
|
/* If the default stream is requested, just stat the base file. */
|
|
if (is_ntfs_default_stream_smb_fname(smb_fname)) {
|
|
return streams_depot_stat_base(handle, smb_fname, false);
|
|
}
|
|
|
|
/* Stat the actual stream now. */
|
|
status = stream_smb_fname(handle, smb_fname, &smb_fname_stream,
|
|
false);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
ret = -1;
|
|
errno = map_errno_from_nt_status(status);
|
|
goto done;
|
|
}
|
|
|
|
ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname_stream);
|
|
|
|
done:
|
|
TALLOC_FREE(smb_fname_stream);
|
|
return ret;
|
|
}
|
|
|
|
static int streams_depot_open(vfs_handle_struct *handle,
|
|
struct smb_filename *smb_fname,
|
|
files_struct *fsp, int flags, mode_t mode)
|
|
{
|
|
struct smb_filename *smb_fname_stream = NULL;
|
|
struct smb_filename *smb_fname_base = NULL;
|
|
NTSTATUS status;
|
|
int ret = -1;
|
|
|
|
if (!is_ntfs_stream_smb_fname(smb_fname)) {
|
|
return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
|
|
}
|
|
|
|
/* If the default stream is requested, just open the base file. */
|
|
if (is_ntfs_default_stream_smb_fname(smb_fname)) {
|
|
char *tmp_stream_name;
|
|
|
|
tmp_stream_name = smb_fname->stream_name;
|
|
smb_fname->stream_name = NULL;
|
|
ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
|
|
smb_fname->stream_name = tmp_stream_name;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Ensure the base file still exists. */
|
|
smb_fname_base = synthetic_smb_fname(
|
|
talloc_tos(), smb_fname->base_name, NULL, NULL);
|
|
if (smb_fname_base == NULL) {
|
|
ret = -1;
|
|
errno = ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
ret = SMB_VFS_NEXT_STAT(handle, smb_fname_base);
|
|
if (ret == -1) {
|
|
goto done;
|
|
}
|
|
|
|
/* Determine the stream name, and then open it. */
|
|
status = stream_smb_fname(handle, smb_fname, &smb_fname_stream, true);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
ret = -1;
|
|
errno = map_errno_from_nt_status(status);
|
|
goto done;
|
|
}
|
|
|
|
ret = SMB_VFS_NEXT_OPEN(handle, smb_fname_stream, fsp, flags, mode);
|
|
|
|
done:
|
|
TALLOC_FREE(smb_fname_stream);
|
|
TALLOC_FREE(smb_fname_base);
|
|
return ret;
|
|
}
|
|
|
|
static int streams_depot_unlink(vfs_handle_struct *handle,
|
|
const struct smb_filename *smb_fname)
|
|
{
|
|
struct smb_filename *smb_fname_base = NULL;
|
|
int ret = -1;
|
|
|
|
DEBUG(10, ("streams_depot_unlink called for %s\n",
|
|
smb_fname_str_dbg(smb_fname)));
|
|
|
|
/* If there is a valid stream, just unlink the stream and return. */
|
|
if (is_ntfs_stream_smb_fname(smb_fname) &&
|
|
!is_ntfs_default_stream_smb_fname(smb_fname)) {
|
|
struct smb_filename *smb_fname_stream = NULL;
|
|
NTSTATUS status;
|
|
|
|
status = stream_smb_fname(handle, smb_fname, &smb_fname_stream,
|
|
false);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
errno = map_errno_from_nt_status(status);
|
|
return -1;
|
|
}
|
|
|
|
ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_stream);
|
|
|
|
TALLOC_FREE(smb_fname_stream);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* We potentially need to delete the per-inode streams directory
|
|
*/
|
|
|
|
smb_fname_base = synthetic_smb_fname(
|
|
talloc_tos(), smb_fname->base_name, NULL, NULL);
|
|
if (smb_fname_base == NULL) {
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
|
|
if (lp_posix_pathnames()) {
|
|
ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname_base);
|
|
} else {
|
|
ret = SMB_VFS_NEXT_STAT(handle, smb_fname_base);
|
|
}
|
|
|
|
if (ret == -1) {
|
|
TALLOC_FREE(smb_fname_base);
|
|
return -1;
|
|
}
|
|
|
|
ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
|
|
if (ret == 0) {
|
|
char *dirname = stream_dir(handle, smb_fname_base,
|
|
&smb_fname_base->st, false);
|
|
|
|
if (dirname != NULL) {
|
|
SMB_VFS_NEXT_RMDIR(handle, dirname);
|
|
}
|
|
TALLOC_FREE(dirname);
|
|
}
|
|
|
|
TALLOC_FREE(smb_fname_base);
|
|
return ret;
|
|
}
|
|
|
|
static int streams_depot_rmdir(vfs_handle_struct *handle, const char *path)
|
|
{
|
|
struct smb_filename *smb_fname_base = NULL;
|
|
int ret = -1;
|
|
|
|
DEBUG(10, ("streams_depot_rmdir called for %s\n", path));
|
|
|
|
/*
|
|
* We potentially need to delete the per-inode streams directory
|
|
*/
|
|
|
|
smb_fname_base = synthetic_smb_fname(talloc_tos(), path, NULL, NULL);
|
|
if (smb_fname_base == NULL) {
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
|
|
if (lp_posix_pathnames()) {
|
|
ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname_base);
|
|
} else {
|
|
ret = SMB_VFS_NEXT_STAT(handle, smb_fname_base);
|
|
}
|
|
|
|
if (ret == -1) {
|
|
TALLOC_FREE(smb_fname_base);
|
|
return -1;
|
|
}
|
|
|
|
ret = SMB_VFS_NEXT_RMDIR(handle, path);
|
|
if (ret == 0) {
|
|
char *dirname = stream_dir(handle, smb_fname_base,
|
|
&smb_fname_base->st, false);
|
|
|
|
if (dirname != NULL) {
|
|
SMB_VFS_NEXT_RMDIR(handle, dirname);
|
|
}
|
|
TALLOC_FREE(dirname);
|
|
}
|
|
|
|
TALLOC_FREE(smb_fname_base);
|
|
return ret;
|
|
}
|
|
|
|
static int streams_depot_rename(vfs_handle_struct *handle,
|
|
const struct smb_filename *smb_fname_src,
|
|
const struct smb_filename *smb_fname_dst)
|
|
{
|
|
struct smb_filename *smb_fname_src_stream = NULL;
|
|
struct smb_filename *smb_fname_dst_stream = NULL;
|
|
bool src_is_stream, dst_is_stream;
|
|
NTSTATUS status;
|
|
int ret = -1;
|
|
|
|
DEBUG(10, ("streams_depot_rename called for %s => %s\n",
|
|
smb_fname_str_dbg(smb_fname_src),
|
|
smb_fname_str_dbg(smb_fname_dst)));
|
|
|
|
src_is_stream = is_ntfs_stream_smb_fname(smb_fname_src);
|
|
dst_is_stream = is_ntfs_stream_smb_fname(smb_fname_dst);
|
|
|
|
if (!src_is_stream && !dst_is_stream) {
|
|
return SMB_VFS_NEXT_RENAME(handle, smb_fname_src,
|
|
smb_fname_dst);
|
|
}
|
|
|
|
/* for now don't allow renames from or to the default stream */
|
|
if (is_ntfs_default_stream_smb_fname(smb_fname_src) ||
|
|
is_ntfs_default_stream_smb_fname(smb_fname_dst)) {
|
|
errno = ENOSYS;
|
|
goto done;
|
|
}
|
|
|
|
status = stream_smb_fname(handle, smb_fname_src, &smb_fname_src_stream,
|
|
false);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
errno = map_errno_from_nt_status(status);
|
|
goto done;
|
|
}
|
|
|
|
status = stream_smb_fname(handle, smb_fname_dst,
|
|
&smb_fname_dst_stream, false);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
errno = map_errno_from_nt_status(status);
|
|
goto done;
|
|
}
|
|
|
|
ret = SMB_VFS_NEXT_RENAME(handle, smb_fname_src_stream,
|
|
smb_fname_dst_stream);
|
|
|
|
done:
|
|
TALLOC_FREE(smb_fname_src_stream);
|
|
TALLOC_FREE(smb_fname_dst_stream);
|
|
return ret;
|
|
}
|
|
|
|
static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
|
|
struct stream_struct **streams,
|
|
const char *name, off_t size,
|
|
off_t alloc_size)
|
|
{
|
|
struct stream_struct *tmp;
|
|
|
|
tmp = talloc_realloc(mem_ctx, *streams, struct stream_struct,
|
|
(*num_streams)+1);
|
|
if (tmp == NULL) {
|
|
return false;
|
|
}
|
|
|
|
tmp[*num_streams].name = talloc_strdup(tmp, name);
|
|
if (tmp[*num_streams].name == NULL) {
|
|
return false;
|
|
}
|
|
|
|
tmp[*num_streams].size = size;
|
|
tmp[*num_streams].alloc_size = alloc_size;
|
|
|
|
*streams = tmp;
|
|
*num_streams += 1;
|
|
return true;
|
|
}
|
|
|
|
struct streaminfo_state {
|
|
TALLOC_CTX *mem_ctx;
|
|
vfs_handle_struct *handle;
|
|
unsigned int num_streams;
|
|
struct stream_struct *streams;
|
|
NTSTATUS status;
|
|
};
|
|
|
|
static bool collect_one_stream(const char *dirname,
|
|
const char *dirent,
|
|
void *private_data)
|
|
{
|
|
struct streaminfo_state *state =
|
|
(struct streaminfo_state *)private_data;
|
|
struct smb_filename *smb_fname = NULL;
|
|
char *sname = NULL;
|
|
bool ret;
|
|
|
|
sname = talloc_asprintf(talloc_tos(), "%s/%s", dirname, dirent);
|
|
if (sname == NULL) {
|
|
state->status = NT_STATUS_NO_MEMORY;
|
|
ret = false;
|
|
goto out;
|
|
}
|
|
|
|
smb_fname = synthetic_smb_fname(talloc_tos(), sname, NULL, NULL);
|
|
if (smb_fname == NULL) {
|
|
state->status = NT_STATUS_NO_MEMORY;
|
|
ret = false;
|
|
goto out;
|
|
}
|
|
|
|
if (SMB_VFS_NEXT_STAT(state->handle, smb_fname) == -1) {
|
|
DEBUG(10, ("Could not stat %s: %s\n", sname,
|
|
strerror(errno)));
|
|
ret = true;
|
|
goto out;
|
|
}
|
|
|
|
if (!add_one_stream(state->mem_ctx,
|
|
&state->num_streams, &state->streams,
|
|
dirent, smb_fname->st.st_ex_size,
|
|
SMB_VFS_GET_ALLOC_SIZE(state->handle->conn, NULL,
|
|
&smb_fname->st))) {
|
|
state->status = NT_STATUS_NO_MEMORY;
|
|
ret = false;
|
|
goto out;
|
|
}
|
|
|
|
ret = true;
|
|
out:
|
|
TALLOC_FREE(sname);
|
|
TALLOC_FREE(smb_fname);
|
|
return ret;
|
|
}
|
|
|
|
static NTSTATUS streams_depot_streaminfo(vfs_handle_struct *handle,
|
|
struct files_struct *fsp,
|
|
const char *fname,
|
|
TALLOC_CTX *mem_ctx,
|
|
unsigned int *pnum_streams,
|
|
struct stream_struct **pstreams)
|
|
{
|
|
struct smb_filename *smb_fname_base;
|
|
int ret;
|
|
NTSTATUS status;
|
|
struct streaminfo_state state;
|
|
|
|
smb_fname_base = synthetic_smb_fname(talloc_tos(), fname, NULL, NULL);
|
|
if (smb_fname_base == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
if ((fsp != NULL) && (fsp->fh->fd != -1)) {
|
|
ret = SMB_VFS_NEXT_FSTAT(handle, fsp, &smb_fname_base->st);
|
|
}
|
|
else {
|
|
if (lp_posix_pathnames()) {
|
|
ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname_base);
|
|
} else {
|
|
ret = SMB_VFS_NEXT_STAT(handle, smb_fname_base);
|
|
}
|
|
}
|
|
|
|
if (ret == -1) {
|
|
status = map_nt_error_from_unix(errno);
|
|
goto out;
|
|
}
|
|
|
|
state.streams = *pstreams;
|
|
state.num_streams = *pnum_streams;
|
|
state.mem_ctx = mem_ctx;
|
|
state.handle = handle;
|
|
state.status = NT_STATUS_OK;
|
|
|
|
if (S_ISLNK(smb_fname_base->st.st_ex_mode)) {
|
|
/*
|
|
* Currently we do't have SMB_VFS_LLISTXATTR
|
|
* inside the VFS which means there's no way
|
|
* to cope with a symlink when lp_posix_pathnames().
|
|
* returns true. For now ignore links.
|
|
* FIXME - by adding SMB_VFS_LLISTXATTR. JRA.
|
|
*/
|
|
status = NT_STATUS_OK;
|
|
} else {
|
|
status = walk_streams(handle, smb_fname_base, NULL, collect_one_stream,
|
|
&state);
|
|
}
|
|
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
TALLOC_FREE(state.streams);
|
|
goto out;
|
|
}
|
|
|
|
if (!NT_STATUS_IS_OK(state.status)) {
|
|
TALLOC_FREE(state.streams);
|
|
status = state.status;
|
|
goto out;
|
|
}
|
|
|
|
*pnum_streams = state.num_streams;
|
|
*pstreams = state.streams;
|
|
status = SMB_VFS_NEXT_STREAMINFO(handle, fsp, fname, mem_ctx, pnum_streams, pstreams);
|
|
|
|
out:
|
|
TALLOC_FREE(smb_fname_base);
|
|
return status;
|
|
}
|
|
|
|
static uint32_t streams_depot_fs_capabilities(struct vfs_handle_struct *handle,
|
|
enum timestamp_set_resolution *p_ts_res)
|
|
{
|
|
return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res) | FILE_NAMED_STREAMS;
|
|
}
|
|
|
|
static struct vfs_fn_pointers vfs_streams_depot_fns = {
|
|
.fs_capabilities_fn = streams_depot_fs_capabilities,
|
|
.open_fn = streams_depot_open,
|
|
.stat_fn = streams_depot_stat,
|
|
.lstat_fn = streams_depot_lstat,
|
|
.unlink_fn = streams_depot_unlink,
|
|
.rmdir_fn = streams_depot_rmdir,
|
|
.rename_fn = streams_depot_rename,
|
|
.streaminfo_fn = streams_depot_streaminfo,
|
|
};
|
|
|
|
NTSTATUS vfs_streams_depot_init(void);
|
|
NTSTATUS vfs_streams_depot_init(void)
|
|
{
|
|
return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_depot",
|
|
&vfs_streams_depot_fns);
|
|
}
|