+++ /dev/null
-/*
- * Unix SMB/CIFS implementation.
- *
- * Support for OneFS Alternate Data Streams
- *
- * Copyright (C) Tim Prouty, 2008
- *
- * 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 "onefs.h"
-#include <sys/isi_enc.h>
-
-/*
- * OneFS stores streams without the explicit :$DATA at the end, so this strips
- * it off. All onefs_stream functions must call through this instead of
- * split_ntfs_stream_name directly.
- */
-NTSTATUS onefs_split_ntfs_stream_name(TALLOC_CTX *mem_ctx, const char *fname,
- char **pbase, char **pstream)
-{
- NTSTATUS status;
- char *stream;
-
- status = split_ntfs_stream_name(mem_ctx, fname, pbase, pstream);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- /* Default $DATA stream. */
- if (pstream == NULL || *pstream == NULL) {
- return NT_STATUS_OK;
- }
-
- /* Strip off the $DATA. */
- stream = strrchr_m(*pstream, ':');
- SMB_ASSERT(stream);
- stream[0] = '\0';
-
- return NT_STATUS_OK;
-}
-
-int onefs_is_stream(const char *path, char **pbase, char **pstream,
- bool *is_stream)
-{
- (*is_stream) = is_ntfs_stream_name(path);
-
- if (!(*is_stream)) {
- return 0;
- }
-
- if (!NT_STATUS_IS_OK(onefs_split_ntfs_stream_name(talloc_tos(), path,
- pbase, pstream))) {
- DEBUG(10, ("onefs_split_ntfs_stream_name failed\n"));
- errno = ENOMEM;
- return -1;
- }
-
- return 0;
-}
-
-int onefs_close(vfs_handle_struct *handle, struct files_struct *fsp)
-{
- int ret2, ret = 0;
-
- if (fsp->base_fsp) {
- ret = SMB_VFS_NEXT_CLOSE(handle, fsp->base_fsp);
- }
- ret2 = SMB_VFS_NEXT_CLOSE(handle, fsp);
-
- return ret ? ret : ret2;
-}
-
-/*
- * Get the ADS directory fd for a file.
- */
-static int get_stream_dir_fd(connection_struct *conn, const char *base,
- int *base_fdp)
-{
- int base_fd;
- int dir_fd;
- int saved_errno;
-
- /* If a valid base_fdp was given, use it. */
- if (base_fdp && *base_fdp >= 0) {
- base_fd = *base_fdp;
- } else {
- base_fd = onefs_sys_create_file(conn,
- -1,
- base,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- INTERNAL_OPEN_ONLY,
- 0,
- NULL,
- 0,
- NULL);
- if (base_fd < 0) {
- return -1;
- }
- }
-
- /* Open the ADS directory. */
- dir_fd = onefs_sys_create_file(conn,
- base_fd,
- ".",
- 0,
- FILE_READ_DATA,
- 0,
- 0,
- 0,
- 0,
- INTERNAL_OPEN_ONLY,
- 0,
- NULL,
- 0,
- NULL);
-
- /* Close base_fd if it's not need or on error. */
- if (!base_fdp || dir_fd < 0) {
- saved_errno = errno;
- close(base_fd);
- errno = saved_errno;
- }
-
- /* Set the out base_fdp if successful and it was requested. */
- if (base_fdp && dir_fd >= 0) {
- *base_fdp = base_fd;
- }
-
- return dir_fd;
-}
-
-int onefs_rename(vfs_handle_struct *handle, const char *oldname,
- const char *newname)
-{
- TALLOC_CTX *frame = NULL;
- int ret = -1;
- int dir_fd = -1;
- int saved_errno;
- bool old_is_stream;
- bool new_is_stream;
- char *obase = NULL;
- char *osname = NULL;
- char *nbase = NULL;
- char *nsname = NULL;
-
- START_PROFILE(syscall_rename_at);
-
- frame = talloc_stackframe();
-
- ret = onefs_is_stream(oldname, &obase, &osname, &old_is_stream);
- if (ret) {
- END_PROFILE(syscall_rename_at);
- return ret;
- }
-
- ret = onefs_is_stream(newname, &nbase, &nsname, &new_is_stream);
- if (ret) {
- END_PROFILE(syscall_rename_at);
- return ret;
- }
-
- if (!old_is_stream && !new_is_stream) {
- ret = SMB_VFS_NEXT_RENAME(handle, oldname, newname);
- END_PROFILE(syscall_rename_at);
- return ret;
- }
-
- dir_fd = get_stream_dir_fd(handle->conn, obase, NULL);
- if (dir_fd < -1) {
- goto done;
- }
-
- DEBUG(8,("onefs_rename called for %s : %s => %s : %s\n",
- obase, osname, nbase, nsname));
-
- /* Handle rename of stream to default stream specially. */
- if (nsname == NULL) {
- ret = enc_renameat(dir_fd, osname, ENC_DEFAULT, AT_FDCWD,
- nbase, ENC_DEFAULT);
- } else {
- ret = enc_renameat(dir_fd, osname, ENC_DEFAULT, dir_fd, nsname,
- ENC_DEFAULT);
- }
-
- done:
- END_PROFILE(syscall_rename_at);
-
- saved_errno = errno;
- if (dir_fd >= 0) {
- close(dir_fd);
- }
- errno = saved_errno;
- TALLOC_FREE(frame);
- return ret;
-}
-
-/*
- * Merge a base file's sbuf into the a streams's sbuf.
- */
-static void merge_stat(SMB_STRUCT_STAT *stream_sbuf,
- const SMB_STRUCT_STAT *base_sbuf)
-{
- int dos_flags = (UF_DOS_NOINDEX | UF_DOS_ARCHIVE |
- UF_DOS_HIDDEN | UF_DOS_RO | UF_DOS_SYSTEM);
- stream_sbuf->st_mtime = base_sbuf->st_mtime;
- stream_sbuf->st_ctime = base_sbuf->st_ctime;
- stream_sbuf->st_atime = base_sbuf->st_atime;
- stream_sbuf->st_flags &= ~dos_flags;
- stream_sbuf->st_flags |= base_sbuf->st_flags & dos_flags;
-}
-
-/* fake timestamps */
-static void onefs_adjust_stat_time(vfs_handle_struct *handle, const char *fname,
- SMB_STRUCT_STAT *sbuf)
-{
- struct onefs_vfs_config cfg;
- struct timeval tv_now = {0, 0};
- bool static_mtime = False;
- bool static_atime = False;
-
- if (!onefs_get_config(SNUM(handle->conn),
- ONEFS_VFS_CONFIG_FAKETIMESTAMPS, &cfg)) {
- return;
- }
-
- if (IS_MTIME_STATIC_PATH(handle->conn, &cfg, fname)) {
- sbuf->st_mtime = sbuf->st_birthtime;
- static_mtime = True;
- }
- if (IS_ATIME_STATIC_PATH(handle->conn, &cfg, fname)) {
- sbuf->st_atime = sbuf->st_birthtime;
- static_atime = True;
- }
-
- if (IS_CTIME_NOW_PATH(handle->conn, &cfg, fname)) {
- if (cfg.ctime_slop < 0) {
- sbuf->st_birthtime = INT_MAX - 1;
- } else {
- GetTimeOfDay(&tv_now);
- sbuf->st_birthtime = tv_now.tv_sec + cfg.ctime_slop;
- }
- }
-
- if (!static_mtime && IS_MTIME_NOW_PATH(handle->conn,&cfg,fname)) {
- if (cfg.mtime_slop < 0) {
- sbuf->st_mtime = INT_MAX - 1;
- } else {
- if (tv_now.tv_sec == 0)
- GetTimeOfDay(&tv_now);
- sbuf->st_mtime = tv_now.tv_sec + cfg.mtime_slop;
- }
- }
- if (!static_atime && IS_ATIME_NOW_PATH(handle->conn,&cfg,fname)) {
- if (cfg.atime_slop < 0) {
- sbuf->st_atime = INT_MAX - 1;
- } else {
- if (tv_now.tv_sec == 0)
- GetTimeOfDay(&tv_now);
- sbuf->st_atime = tv_now.tv_sec + cfg.atime_slop;
- }
- }
-}
-
-static int stat_stream(vfs_handle_struct *handle, const char *base,
- const char *stream, SMB_STRUCT_STAT *sbuf, int flags)
-{
- SMB_STRUCT_STAT base_sbuf;
- int base_fd = -1, dir_fd, ret, saved_errno;
-
- dir_fd = get_stream_dir_fd(handle->conn, base, &base_fd);
- if (dir_fd < 0) {
- return -1;
- }
-
- /* Stat the stream. */
- ret = enc_fstatat(dir_fd, stream, ENC_DEFAULT, sbuf, flags);
- if (ret != -1) {
- /* Now stat the base file and merge the results. */
- ret = sys_fstat(base_fd, &base_sbuf);
- if (ret != -1) {
- merge_stat(sbuf, &base_sbuf);
- }
- }
-
- saved_errno = errno;
- close(dir_fd);
- close(base_fd);
- errno = saved_errno;
- return ret;
-}
-
-int onefs_stat(vfs_handle_struct *handle, const char *path,
- SMB_STRUCT_STAT *sbuf)
-{
- int ret;
- bool is_stream;
- char *base = NULL;
- char *stream = NULL;
-
- ret = onefs_is_stream(path, &base, &stream, &is_stream);
- if (ret)
- return ret;
-
- if (!is_stream) {
- ret = SMB_VFS_NEXT_STAT(handle, path, sbuf);
- } else if (!stream) {
- /* If it's the ::$DATA stream just stat the base file name. */
- ret = SMB_VFS_NEXT_STAT(handle, base, sbuf);
- } else {
- ret = stat_stream(handle, base, stream, sbuf, 0);
- }
-
- onefs_adjust_stat_time(handle, path, sbuf);
- return ret;
-}
-
-int onefs_fstat(vfs_handle_struct *handle, struct files_struct *fsp,
- SMB_STRUCT_STAT *sbuf)
-{
- SMB_STRUCT_STAT base_sbuf;
- int ret;
-
- /* Stat the stream, by calling next_fstat on the stream's fd. */
- ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
- if (ret == -1) {
- return ret;
- }
-
- /* Stat the base file and merge the results. */
- if (fsp != NULL && fsp->base_fsp != NULL) {
- ret = sys_fstat(fsp->base_fsp->fh->fd, &base_sbuf);
- if (ret != -1) {
- merge_stat(sbuf, &base_sbuf);
- }
- }
-
- onefs_adjust_stat_time(handle, fsp->fsp_name, sbuf);
- return ret;
-}
-
-int onefs_lstat(vfs_handle_struct *handle, const char *path,
- SMB_STRUCT_STAT *sbuf)
-{
- int ret;
- bool is_stream;
- char *base = NULL;
- char *stream = NULL;
-
- ret = onefs_is_stream(path, &base, &stream, &is_stream);
- if (ret)
- return ret;
-
- if (!is_stream) {
- ret = SMB_VFS_NEXT_LSTAT(handle, path, sbuf);
- } else if (!stream) {
- /* If it's the ::$DATA stream just stat the base file name. */
- ret = SMB_VFS_NEXT_LSTAT(handle, base, sbuf);
- } else {
- ret = stat_stream(handle, base, stream, sbuf,
- AT_SYMLINK_NOFOLLOW);
- }
-
- onefs_adjust_stat_time(handle, path, sbuf);
- return ret;
-}
-
-int onefs_unlink(vfs_handle_struct *handle, const char *path)
-{
- int ret;
- bool is_stream;
- char *base = NULL;
- char *stream = NULL;
- int dir_fd, saved_errno;
-
- ret = onefs_is_stream(path, &base, &stream, &is_stream);
- if (ret) {
- return ret;
- }
-
- if (!is_stream) {
- return SMB_VFS_NEXT_UNLINK(handle, path);
- }
-
- /* If it's the ::$DATA stream just unlink the base file name. */
- if (!stream) {
- return SMB_VFS_NEXT_UNLINK(handle, base);
- }
-
- dir_fd = get_stream_dir_fd(handle->conn, base, NULL);
- if (dir_fd < 0) {
- return -1;
- }
-
- ret = enc_unlinkat(dir_fd, stream, ENC_DEFAULT, 0);
-
- saved_errno = errno;
- close(dir_fd);
- errno = saved_errno;
- return ret;
-}
-
-int onefs_vtimes_streams(vfs_handle_struct *handle, const char *fname,
- int flags, struct timespec times[3])
-{
- int ret;
- bool is_stream;
- char *base;
- char *stream;
- int dirfd;
- int saved_errno;
-
- START_PROFILE(syscall_ntimes);
-
- ret = onefs_is_stream(fname, &base, &stream, &is_stream);
- if (ret)
- return ret;
-
- if (!is_stream) {
- ret = vtimes(fname, times, flags);
- return ret;
- }
-
- dirfd = get_stream_dir_fd(handle->conn, base, NULL);
- if (dirfd < -1) {
- return -1;
- }
-
- ret = enc_vtimesat(dirfd, stream, ENC_DEFAULT, times, flags);
-
- END_PROFILE(syscall_ntimes);
-
- saved_errno = errno;
- close(dirfd);
- errno = saved_errno;
- return ret;
-}
-
-int onefs_chflags(vfs_handle_struct *handle, const char *path,
- unsigned int flags)
-{
- char *base = NULL;
- char *stream = NULL;
-
- if (!NT_STATUS_IS_OK(onefs_split_ntfs_stream_name(talloc_tos(), path,
- &base, &stream))) {
- DEBUG(10, ("onefs_split_ntfs_stream_name failed\n"));
- errno = ENOMEM;
- return -1;
- }
-
- /*
- * Only set the attributes on the base file. ifs_createfile handles
- * file creation attribute semantics.
- */
- return SMB_VFS_NEXT_CHFLAGS(handle, base, flags);
-}
-
-/*
- * Streaminfo enumeration functionality
- */
-struct streaminfo_state {
- TALLOC_CTX *mem_ctx;
- vfs_handle_struct *handle;
- unsigned int num_streams;
- struct stream_struct *streams;
- NTSTATUS status;
-};
-
-static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
- struct stream_struct **streams,
- const char *name, SMB_OFF_T size,
- SMB_OFF_T alloc_size)
-{
- struct stream_struct *tmp;
-
- tmp = TALLOC_REALLOC_ARRAY(mem_ctx, *streams, struct stream_struct,
- (*num_streams)+1);
- if (tmp == NULL) {
- return false;
- }
-
- tmp[*num_streams].name = talloc_asprintf(mem_ctx, ":%s:%s", name,
- "$DATA");
- 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;
-}
-
-static NTSTATUS walk_onefs_streams(connection_struct *conn, files_struct *fsp,
- const char *fname,
- struct streaminfo_state *state,
- SMB_STRUCT_STAT *base_sbuf)
-{
- NTSTATUS status = NT_STATUS_OK;
- bool opened_base_fd = false;
- int base_fd = -1;
- int dir_fd = -1;
- int stream_fd = -1;
- int ret;
- SMB_STRUCT_DIR *dirp = NULL;
- SMB_STRUCT_DIRENT *dp = NULL;
- files_struct fake_fs;
- struct fd_handle fake_fh;
- SMB_STRUCT_STAT stream_sbuf;
-
- ZERO_STRUCT(fake_fh);
- ZERO_STRUCT(fake_fs);
-
- /* If the base file is already open, use its fd. */
- if ((fsp != NULL) && (fsp->fh->fd != -1)) {
- base_fd = fsp->fh->fd;
- } else {
- opened_base_fd = true;
- }
-
- dir_fd = get_stream_dir_fd(conn, fname, &base_fd);
- if (dir_fd < 0) {
- return map_nt_error_from_unix(errno);
- }
-
- /* Open the ADS directory. */
- if ((dirp = fdopendir(dir_fd)) == NULL) {
- DEBUG(0, ("Error on opendir %s. errno=%d (%s)\n",
- fname, errno, strerror(errno)));
- status = map_nt_error_from_unix(errno);
- goto out;
- }
-
- /* Initialize the dir state struct and add it to the list.
- * This is a layer violation, and really should be handled by a
- * VFS_FDOPENDIR() call which would properly setup the dir state.
- * But since this is all within the onefs.so module, we cheat for
- * now and call directly into the readdirplus code.
- * NOTE: This state MUST be freed by a proper VFS_CLOSEDIR() call. */
- ret = onefs_rdp_add_dir_state(conn, dirp);
- if (ret) {
- DEBUG(0, ("Error adding dir_state to the list\n"));
- status = map_nt_error_from_unix(errno);
- goto out;
- }
-
- fake_fs.conn = conn;
- fake_fs.fh = &fake_fh;
- fake_fs.fsp_name = SMB_STRDUP(fname);
-
- /* Iterate over the streams in the ADS directory. */
- while ((dp = SMB_VFS_READDIR(conn, dirp, NULL)) != NULL) {
- /* Skip the "." and ".." entries */
- if ((strcmp(dp->d_name, ".") == 0) ||
- (strcmp(dp->d_name, "..") == 0))
- continue;
-
- /* Open actual stream */
- if ((stream_fd = onefs_sys_create_file(conn,
- base_fd,
- dp->d_name,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- INTERNAL_OPEN_ONLY,
- 0,
- NULL,
- 0,
- NULL)) == -1) {
- DEBUG(0, ("Error opening stream %s:%s. "
- "errno=%d (%s)\n", fname, dp->d_name, errno,
- strerror(errno)));
- continue;
- }
-
- /* Figure out the stat info. */
- fake_fh.fd = stream_fd;
- ret = SMB_VFS_FSTAT(&fake_fs, &stream_sbuf);
- close(stream_fd);
-
- if (ret) {
- DEBUG(0, ("Error fstating stream %s:%s. "
- "errno=%d (%s)\n", fname, dp->d_name, errno,
- strerror(errno)));
- continue;
- }
-
- merge_stat(&stream_sbuf, base_sbuf);
-
- if (!add_one_stream(state->mem_ctx,
- &state->num_streams, &state->streams,
- dp->d_name, stream_sbuf.st_size,
- SMB_VFS_GET_ALLOC_SIZE(conn, NULL,
- &stream_sbuf))) {
- state->status = NT_STATUS_NO_MEMORY;
- break;
- }
- }
-
-out:
- /* Cleanup everything that was opened. */
- if (dirp != NULL) {
- SMB_VFS_CLOSEDIR(conn, dirp);
- }
- if (dir_fd >= 0) {
- close(dir_fd);
- }
- if (opened_base_fd) {
- SMB_ASSERT(base_fd >= 0);
- close(base_fd);
- }
-
- SAFE_FREE(fake_fs.fsp_name);
- return status;
-}
-
-NTSTATUS onefs_streaminfo(vfs_handle_struct *handle,
- struct files_struct *fsp,
- const char *fname,
- TALLOC_CTX *mem_ctx,
- unsigned int *num_streams,
- struct stream_struct **streams)
-{
- SMB_STRUCT_STAT sbuf;
- int ret;
- NTSTATUS status;
- struct streaminfo_state state;
-
- /* Get a valid stat. */
- if ((fsp != NULL) && (fsp->fh->fd != -1)) {
- if (is_ntfs_stream_name(fsp->fsp_name)) {
- return NT_STATUS_INVALID_PARAMETER;
- }
- ret = SMB_VFS_FSTAT(fsp, &sbuf);
- } else {
- if (is_ntfs_stream_name(fname)) {
- return NT_STATUS_INVALID_PARAMETER;
- }
- ret = SMB_VFS_STAT(handle->conn, fname, &sbuf);
- }
-
- if (ret == -1) {
- return map_nt_error_from_unix(errno);
- }
-
- state.streams = NULL;
- state.num_streams = 0;
-
- /* Add the default stream. */
- if (S_ISREG(sbuf.st_mode)) {
- if (!add_one_stream(mem_ctx,
- &state.num_streams, &state.streams,
- "", sbuf.st_size,
- SMB_VFS_GET_ALLOC_SIZE(handle->conn, fsp,
- &sbuf))) {
- return NT_STATUS_NO_MEMORY;
- }
- }
-
- state.mem_ctx = mem_ctx;
- state.handle = handle;
- state.status = NT_STATUS_OK;
-
- /* If there are more streams, add them too. */
- if (sbuf.st_flags & UF_HASADS) {
-
- status = walk_onefs_streams(handle->conn, fsp, fname,
- &state, &sbuf);
-
- if (!NT_STATUS_IS_OK(status)) {
- TALLOC_FREE(state.streams);
- return status;
- }
-
- if (!NT_STATUS_IS_OK(state.status)) {
- TALLOC_FREE(state.streams);
- return state.status;
- }
- }
-
- *num_streams = state.num_streams;
- *streams = state.streams;
- return NT_STATUS_OK;
-}
git.samba.org / samba.git / blobdiff