diff options
Diffstat (limited to 'source3/modules/vfs_shadow_copy2.c')
| -rw-r--r-- | source3/modules/vfs_shadow_copy2.c | 1811 |
1 files changed, 1209 insertions, 602 deletions
diff --git a/source3/modules/vfs_shadow_copy2.c b/source3/modules/vfs_shadow_copy2.c index df3bde72c9..ca33b6d344 100644 --- a/source3/modules/vfs_shadow_copy2.c +++ b/source3/modules/vfs_shadow_copy2.c @@ -1,32 +1,29 @@ -/* - * implementation of an Shadow Copy module - version 2 +/* + * Third attempt at a shadow copy module * - * Copyright (C) Andrew Tridgell 2007 - * Copyright (C) Ed Plese 2009 + * Copyright (C) Andrew Tridgell 2007 (portions taken from shadow_copy2) + * Copyright (C) Ed Plese 2009 + * Copyright (C) Volker Lendecke 2011 + * Copyright (C) Christian Ambach 2011 * * 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 * (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, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ -#include "includes.h" -#include "smbd/smbd.h" -#include "system/filesys.h" -#include "ntioctl.h" - /* - This is a 2nd implemetation of a shadow copy module for exposing + This is a 3rd implemetation of a shadow copy module for exposing snapshots to windows clients as shadow copies. This version has the following features: @@ -96,243 +93,169 @@ The following command would generate a correctly formatted directory name for use with the default parameters: date -u +@GMT-%Y.%m.%d-%H.%M.%S - */ -static int vfs_shadow_copy2_debug_level = DBGC_VFS; - -#undef DBGC_CLASS -#define DBGC_CLASS vfs_shadow_copy2_debug_level +#include "includes.h" +#include "system/filesys.h" +#include "include/ntioctl.h" +#include "smbd/proto.h" +#include <tdb.h> +#include "util_tdb.h" #define GMT_NAME_LEN 24 /* length of a @GMT- name */ -#define SHADOW_COPY2_GMT_FORMAT "@GMT-%Y.%m.%d-%H.%M.%S" +#define GMT_FORMAT "@GMT-%Y.%m.%d-%H.%M.%S" -#define SHADOW_COPY2_DEFAULT_SORT NULL -#define SHADOW_COPY2_DEFAULT_FORMAT "@GMT-%Y.%m.%d-%H.%M.%S" -#define SHADOW_COPY2_DEFAULT_LOCALTIME false - -/* - make very sure it is one of our special names - */ -static inline bool shadow_copy2_match_name(const char *name, const char **gmt_start) +static bool shadow_copy2_find_slashes(TALLOC_CTX *mem_ctx, const char *str, + size_t **poffsets, + unsigned *pnum_offsets) { - unsigned year, month, day, hr, min, sec; + unsigned num_offsets; + size_t *offsets; const char *p; - if (gmt_start) { - (*gmt_start) = NULL; - } - p = strstr_m(name, "@GMT-"); - if (p == NULL) return false; - if (p > name && p[-1] != '/') return False; - if (sscanf(p, "@GMT-%04u.%02u.%02u-%02u.%02u.%02u", &year, &month, - &day, &hr, &min, &sec) != 6) { - return False; - } - if (p[24] != 0 && p[24] != '/') { - return False; - } - if (gmt_start) { - (*gmt_start) = p; - } - return True; -} -static char *shadow_copy2_snapshot_to_gmt(TALLOC_CTX *mem_ctx, - vfs_handle_struct *handle, const char *name) -{ - struct tm timestamp; - time_t timestamp_t; - char gmt[GMT_NAME_LEN + 1]; - const char *fmt; + num_offsets = 0; - fmt = lp_parm_const_string(SNUM(handle->conn), "shadow", - "format", SHADOW_COPY2_DEFAULT_FORMAT); + p = str; + while ((p = strchr(p, '/')) != NULL) { + num_offsets += 1; + p += 1; + } - ZERO_STRUCT(timestamp); - if (strptime(name, fmt, ×tamp) == NULL) { - DEBUG(10, ("shadow_copy2_snapshot_to_gmt: no match %s: %s\n", - fmt, name)); - return NULL; + offsets = talloc_array(mem_ctx, size_t, num_offsets); + if (offsets == NULL) { + return false; } - DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n", fmt, name)); - if (lp_parm_bool(SNUM(handle->conn), "shadow", "localtime", - SHADOW_COPY2_DEFAULT_LOCALTIME)) - { - timestamp.tm_isdst = -1; - timestamp_t = mktime(×tamp); - gmtime_r(×tamp_t, ×tamp); + p = str; + num_offsets = 0; + while ((p = strchr(p, '/')) != NULL) { + offsets[num_offsets] = p-str; + num_offsets += 1; + p += 1; } - strftime(gmt, sizeof(gmt), SHADOW_COPY2_GMT_FORMAT, ×tamp); - return talloc_strdup(mem_ctx, gmt); + *poffsets = offsets; + *pnum_offsets = num_offsets; + return true; } -/* - shadow copy paths can also come into the server in this form: - - /foo/bar/@GMT-XXXXX/some/file - - This function normalises the filename to be of the form: - - @GMT-XXXX/foo/bar/some/file - */ -static const char *shadow_copy2_normalise_path(TALLOC_CTX *mem_ctx, const char *path, const char *gmt_start) +static char *shadow_copy2_insert_string(TALLOC_CTX *mem_ctx, + struct vfs_handle_struct *handle, + time_t snapshot) { - char *pcopy; - char buf[GMT_NAME_LEN]; - size_t prefix_len; + struct tm snap_tm; + fstring gmt; + size_t gmt_len; - if (path == gmt_start) { - return path; + if (localtime_r(&snapshot, &snap_tm) == 0) { + DEBUG(10, ("gmtime_r failed\n")); + return NULL; } - - prefix_len = gmt_start - path - 1; - - DEBUG(10, ("path=%s, gmt_start=%s, prefix_len=%d\n", path, gmt_start, - (int)prefix_len)); - - /* - * We've got a/b/c/@GMT-YYYY.MM.DD-HH.MM.SS/d/e. convert to - * @GMT-YYYY.MM.DD-HH.MM.SS/a/b/c/d/e before further - * processing. As many VFS calls provide a const char *, - * unfortunately we have to make a copy. - */ - - pcopy = talloc_strdup(talloc_tos(), path); - if (pcopy == NULL) { + gmt_len = strftime(gmt, sizeof(gmt), + lp_parm_const_string(SNUM(handle->conn), "shadow", + "format", GMT_FORMAT), + &snap_tm); + if (gmt_len == 0) { + DEBUG(10, ("strftime failed\n")); return NULL; } - - gmt_start = pcopy + prefix_len; - - /* - * Copy away "@GMT-YYYY.MM.DD-HH.MM.SS" - */ - memcpy(buf, gmt_start+1, GMT_NAME_LEN); - - /* - * Make space for it including a trailing / - */ - memmove(pcopy + GMT_NAME_LEN + 1, pcopy, prefix_len); - - /* - * Move in "@GMT-YYYY.MM.DD-HH.MM.SS/" at the beginning again - */ - memcpy(pcopy, buf, GMT_NAME_LEN); - pcopy[GMT_NAME_LEN] = '/'; - - DEBUG(10, ("shadow_copy2_normalise_path: %s -> %s\n", path, pcopy)); - - return pcopy; + return talloc_asprintf(talloc_tos(), "/%s/%s", + lp_parm_const_string( + SNUM(handle->conn), "shadow", "snapdir", + ".snapshots"), + gmt); } -/* - convert a name to the shadow directory - */ - -#define _SHADOW2_NEXT(op, args, rtype, eret, extra) do { \ - const char *name = fname; \ - const char *gmt_start; \ - if (shadow_copy2_match_name(fname, &gmt_start)) { \ - char *name2; \ - rtype ret; \ - name2 = convert_shadow2_name(handle, fname, gmt_start); \ - if (name2 == NULL) { \ - errno = EINVAL; \ - return eret; \ - } \ - name = name2; \ - ret = SMB_VFS_NEXT_ ## op args; \ - talloc_free(name2); \ - if (ret != eret) extra; \ - return ret; \ - } else { \ - return SMB_VFS_NEXT_ ## op args; \ - } \ -} while (0) - -#define _SHADOW2_NEXT_SMB_FNAME(op, args, rtype, eret, extra) do { \ - const char *gmt_start; \ - if (shadow_copy2_match_name(smb_fname->base_name, &gmt_start)) { \ - char *name2; \ - char *smb_base_name_tmp = NULL; \ - rtype ret; \ - name2 = convert_shadow2_name(handle, smb_fname->base_name, gmt_start); \ - if (name2 == NULL) { \ - errno = EINVAL; \ - return eret; \ - } \ - smb_base_name_tmp = smb_fname->base_name; \ - smb_fname->base_name = name2; \ - ret = SMB_VFS_NEXT_ ## op args; \ - smb_fname->base_name = smb_base_name_tmp; \ - talloc_free(name2); \ - if (ret != eret) extra; \ - return ret; \ - } else { \ - return SMB_VFS_NEXT_ ## op args; \ - } \ -} while (0) +static bool shadow_copy2_strip_snapshot(TALLOC_CTX *mem_ctx, + struct vfs_handle_struct *handle, + const char *name, + time_t *ptimestamp, + char **pstripped) +{ + struct tm tm; + time_t timestamp; + const char *p; + char *q; + char *stripped; + size_t rest_len, dst_len; -/* - convert a name to the shadow directory: NTSTATUS-specific handling - */ + p = strstr_m(name, "@GMT-"); + if (p == NULL) { + goto no_snapshot; + } + if ((p > name) && (p[-1] != '/')) { + goto no_snapshot; + } + q = strptime(p, GMT_FORMAT, &tm); + if (q == NULL) { + goto no_snapshot; + } + tm.tm_isdst = -1; + timestamp = mktime(&tm); + if (timestamp == (time_t)-1) { + goto no_snapshot; + } + if ((p == name) && (q[0] == '\0')) { + if (pstripped != NULL) { + stripped = talloc_strdup(mem_ctx, ""); + if (stripped == NULL) { + return false; + } + *pstripped = stripped; + } + *ptimestamp = timestamp; + return true; + } + if (q[0] != '/') { + goto no_snapshot; + } + q += 1; + + rest_len = strlen(q); + dst_len = (p-name) + rest_len; + + if (lp_parm_bool(SNUM(handle->conn), "shadow", "snapdirseverywhere", + false)) { + char *insert; + bool have_insert; + insert = shadow_copy2_insert_string(talloc_tos(), handle, + timestamp); + if (insert == NULL) { + errno = ENOMEM; + return false; + } -#define _SHADOW2_NTSTATUS_NEXT(op, args, eret, extra) do { \ - const char *name = fname; \ - const char *gmt_start; \ - if (shadow_copy2_match_name(fname, &gmt_start)) { \ - char *name2; \ - NTSTATUS ret; \ - name2 = convert_shadow2_name(handle, fname, gmt_start); \ - if (name2 == NULL) { \ - errno = EINVAL; \ - return eret; \ - } \ - name = name2; \ - ret = SMB_VFS_NEXT_ ## op args; \ - talloc_free(name2); \ - if (!NT_STATUS_EQUAL(ret, eret)) extra; \ - return ret; \ - } else { \ - return SMB_VFS_NEXT_ ## op args; \ - } \ -} while (0) - -#define SHADOW2_NTSTATUS_NEXT(op, args, eret) _SHADOW2_NTSTATUS_NEXT(op, args, eret, ) - -#define SHADOW2_NEXT(op, args, rtype, eret) _SHADOW2_NEXT(op, args, rtype, eret, ) - -#define SHADOW2_NEXT_SMB_FNAME(op, args, rtype, eret) _SHADOW2_NEXT_SMB_FNAME(op, args, rtype, eret, ) - -#define SHADOW2_NEXT2(op, args) do { \ - const char *gmt_start1, *gmt_start2; \ - if (shadow_copy2_match_name(oldname, &gmt_start1) || \ - shadow_copy2_match_name(newname, &gmt_start2)) { \ - errno = EROFS; \ - return -1; \ - } else { \ - return SMB_VFS_NEXT_ ## op args; \ - } \ -} while (0) - -#define SHADOW2_NEXT2_SMB_FNAME(op, args) do { \ - const char *gmt_start1, *gmt_start2; \ - if (shadow_copy2_match_name(smb_fname_src->base_name, &gmt_start1) || \ - shadow_copy2_match_name(smb_fname_dst->base_name, &gmt_start2)) { \ - errno = EROFS; \ - return -1; \ - } else { \ - return SMB_VFS_NEXT_ ## op args; \ - } \ -} while (0) + have_insert = (strstr(name, insert+1) != NULL); + TALLOC_FREE(insert); + if (have_insert) { + goto no_snapshot; + } + } + if (pstripped != NULL) { + stripped = talloc_array(mem_ctx, char, dst_len+1); + if (stripped == NULL) { + errno = ENOMEM; + return false; + } + if (p > name) { + memcpy(stripped, name, p-name); + } + if (rest_len > 0) { + memcpy(stripped + (p-name), q, rest_len); + } + stripped[dst_len] = '\0'; + *pstripped = stripped; + } + *ptimestamp = timestamp; + return true; +no_snapshot: + *ptimestamp = 0; + return true; +} -/* - find the mount point of a filesystem - */ -static char *find_mount_point(TALLOC_CTX *mem_ctx, vfs_handle_struct *handle) +static char *shadow_copy2_find_mount_point(TALLOC_CTX *mem_ctx, + vfs_handle_struct *handle) { char *path = talloc_strdup(mem_ctx, handle->conn->connectpath); dev_t dev; @@ -358,164 +281,152 @@ static char *find_mount_point(TALLOC_CTX *mem_ctx, vfs_handle_struct *handle) } } - return path; + return path; } -/* - work out the location of the snapshot for this share - */ -static const char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx, vfs_handle_struct *handle) +static char *shadow_copy2_convert(TALLOC_CTX *mem_ctx, + struct vfs_handle_struct *handle, + const char *name, time_t timestamp) { - const char *snapdir; - char *mount_point; - const char *ret; - - snapdir = lp_parm_const_string(SNUM(handle->conn), "shadow", "snapdir", NULL); - if (snapdir == NULL) { - return NULL; - } - /* if its an absolute path, we're done */ - if (*snapdir == '/') { - return snapdir; + struct smb_filename converted_fname; + char *result = NULL; + size_t *slashes = NULL; + unsigned num_slashes; + char *path = NULL; + size_t pathlen; + char *insert = NULL; + char *converted = NULL; + size_t insertlen; + int i, saved_errno; + size_t min_offset; + + path = talloc_asprintf(mem_ctx, "%s/%s", handle->conn->connectpath, + name); + if (path == NULL) { + errno = ENOMEM; + goto fail; } + pathlen = talloc_get_size(path)-1; - /* other its relative to the filesystem mount point */ - mount_point = find_mount_point(mem_ctx, handle); - if (mount_point == NULL) { - return NULL; - } - - ret = talloc_asprintf(mem_ctx, "%s/%s", mount_point, snapdir); - talloc_free(mount_point); - return ret; -} - -/* - work out the location of the base directory for snapshots of this share - */ -static const char *shadow_copy2_find_basedir(TALLOC_CTX *mem_ctx, vfs_handle_struct *handle) -{ - const char *basedir = lp_parm_const_string(SNUM(handle->conn), "shadow", "basedir", NULL); + DEBUG(10, ("converting %s\n", path)); - /* other its the filesystem mount point */ - if (basedir == NULL) { - basedir = find_mount_point(mem_ctx, handle); + if (!shadow_copy2_find_slashes(talloc_tos(), path, + &slashes, &num_slashes)) { + goto fail; } - - return basedir; -} - -/* - convert a filename from a share relative path, to a path in the - snapshot directory - */ -static char *convert_shadow2_name(vfs_handle_struct *handle, const char *fname, const char *gmt_path) -{ - TALLOC_CTX *tmp_ctx = talloc_new(handle->data); - const char *snapdir, *relpath, *baseoffset, *basedir; - size_t baselen; - char *ret, *prefix; - - struct tm timestamp; - time_t timestamp_t; - char snapshot[MAXPATHLEN]; - const char *fmt; - - fmt = lp_parm_const_string(SNUM(handle->conn), "shadow", - "format", SHADOW_COPY2_DEFAULT_FORMAT); - - snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle); - if (snapdir == NULL) { - DEBUG(2,("no snapdir found for share at %s\n", handle->conn->connectpath)); - talloc_free(tmp_ctx); - return NULL; + insert = shadow_copy2_insert_string(talloc_tos(), handle, timestamp); + if (insert == NULL) { + goto fail; } - - basedir = shadow_copy2_find_basedir(tmp_ctx, handle); - if (basedir == NULL) { - DEBUG(2,("no basedir found for share at %s\n", handle->conn->connectpath)); - talloc_free(tmp_ctx); - return NULL; + insertlen = talloc_get_size(insert)-1; + converted = talloc_array(mem_ctx, char, pathlen + insertlen + 1); + if (converted == NULL) { + goto fail; } - prefix = talloc_asprintf(tmp_ctx, "%s/@GMT-", snapdir); - if (strncmp(fname, prefix, (talloc_get_size(prefix)-1)) == 0) { - /* this looks like as we have already normalized it, leave it untouched*/ - talloc_free(tmp_ctx); - return talloc_strdup(handle->data, fname); + if (path[pathlen-1] != '/') { + /* + * Append a fake slash to find the snapshot root + */ + size_t *tmp; + tmp = talloc_realloc(talloc_tos(), slashes, + size_t, num_slashes+1); + if (tmp == NULL) { + goto fail; + } + slashes = tmp; + slashes[num_slashes] = pathlen; + num_slashes += 1; } - if (strncmp(fname, "@GMT-", 5) != 0) { - fname = shadow_copy2_normalise_path(tmp_ctx, fname, gmt_path); - if (fname == NULL) { - talloc_free(tmp_ctx); - return NULL; + min_offset = 0; + + if (!lp_parm_bool(SNUM(handle->conn), "shadow", "crossmountpoints", + false)) { + char *mount_point; + + mount_point = shadow_copy2_find_mount_point(talloc_tos(), + handle); + if (mount_point == NULL) { + goto fail; } + min_offset = strlen(mount_point); + TALLOC_FREE(mount_point); } - ZERO_STRUCT(timestamp); - relpath = strptime(fname, SHADOW_COPY2_GMT_FORMAT, ×tamp); - if (relpath == NULL) { - talloc_free(tmp_ctx); - return NULL; - } + memcpy(converted, path, pathlen+1); + converted[pathlen+insertlen] = '\0'; - /* relpath is the remaining portion of the path after the @GMT-xxx */ + ZERO_STRUCT(converted_fname); + converted_fname.base_name = converted; - if (lp_parm_bool(SNUM(handle->conn), "shadow", "localtime", - SHADOW_COPY2_DEFAULT_LOCALTIME)) - { - timestamp_t = timegm(×tamp); - localtime_r(×tamp_t, ×tamp); - } + for (i = num_slashes-1; i>=0; i--) { + int ret; + size_t offset; - strftime(snapshot, MAXPATHLEN, fmt, ×tamp); + offset = slashes[i]; - baselen = strlen(basedir); - baseoffset = handle->conn->connectpath + baselen; + if (offset < min_offset) { + errno = ENOENT; + goto fail; + } - /* some sanity checks */ - if (strncmp(basedir, handle->conn->connectpath, baselen) != 0 || - (handle->conn->connectpath[baselen] != 0 && handle->conn->connectpath[baselen] != '/')) { - DEBUG(0,("convert_shadow2_name: basedir %s is not a parent of %s\n", - basedir, handle->conn->connectpath)); - talloc_free(tmp_ctx); - return NULL; - } + memcpy(converted+offset, insert, insertlen); - if (*relpath == '/') relpath++; - if (*baseoffset == '/') baseoffset++; + offset += insertlen; + memcpy(converted+offset, path + slashes[i], + pathlen - slashes[i]); - ret = talloc_asprintf(handle->data, "%s/%s/%s/%s", - snapdir, - snapshot, - baseoffset, - relpath); - DEBUG(6,("convert_shadow2_name: '%s' -> '%s'\n", fname, ret)); - talloc_free(tmp_ctx); - return ret; -} + ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname); + DEBUG(10, ("Trying %s: %d (%s)\n", converted, + ret, ret == 0 ? "ok" : strerror(errno))); + if (ret == 0) { + /* success */ + break; + } + if (errno == ENOTDIR) { + /* + * This is a valid condition: We appended the + * .snaphots/@GMT.. to a file name. Just try + * with the upper levels. + */ + continue; + } + if (errno != ENOENT) { + /* Other problem than "not found" */ + goto fail; + } + } -/* - simple string hash - */ -static uint32 string_hash(const char *s) -{ - uint32 n = 0; - while (*s) { - n = ((n << 5) + n) ^ (uint32)(*s++); - } - return n; + if (i >= 0) { + /* + * Found something + */ + DEBUG(10, ("Found %s\n", converted)); + result = converted; + converted = NULL; + } else { + errno = ENOENT; + } +fail: + saved_errno = errno; + TALLOC_FREE(converted); + TALLOC_FREE(insert); + TALLOC_FREE(slashes); + TALLOC_FREE(path); + errno = saved_errno; + return result; } /* modify a sbuf return to ensure that inodes in the shadow directory are different from those in the main directory */ -static void convert_sbuf(vfs_handle_struct *handle, const char *fname, SMB_STRUCT_STAT *sbuf) +static void convert_sbuf(vfs_handle_struct *handle, const char *fname, + SMB_STRUCT_STAT *sbuf) { - if (lp_parm_bool(SNUM(handle->conn), "shadow", "fixinodes", False)) { + if (lp_parm_bool(SNUM(handle->conn), "shadow", "fixinodes", False)) { /* some snapshot systems, like GPFS, return the name device:inode for the snapshot files as the current files. That breaks the 'restore' button in the shadow copy @@ -526,7 +437,10 @@ static void convert_sbuf(vfs_handle_struct *handle, const char *fname, SMB_STRUC number collision, but I can't see a better approach without significant VFS changes */ - uint32_t shash = string_hash(fname) & 0xFF000000; + uint32_t shash; + TDB_DATA data = string_tdb_data(fname); + + shash = tdb_jenkins_hash(&data) & 0xFF000000; if (shash == 0) { shash = 1; } @@ -534,316 +448,607 @@ static void convert_sbuf(vfs_handle_struct *handle, const char *fname, SMB_STRUC } } +static SMB_STRUCT_DIR *shadow_copy2_opendir(vfs_handle_struct *handle, + const char *fname, + const char *mask, + uint32 attr) +{ + time_t timestamp; + char *stripped; + SMB_STRUCT_DIR *ret; + int saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return NULL; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return NULL; + } + ret = SMB_VFS_NEXT_OPENDIR(handle, conv, mask, attr); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} + static int shadow_copy2_rename(vfs_handle_struct *handle, const struct smb_filename *smb_fname_src, const struct smb_filename *smb_fname_dst) { - if (shadow_copy2_match_name(smb_fname_src->base_name, NULL)) { + time_t timestamp_src, timestamp_dst; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, + smb_fname_src->base_name, + ×tamp_src, NULL)) { + return -1; + } + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, + smb_fname_dst->base_name, + ×tamp_dst, NULL)) { + return -1; + } + if (timestamp_src != 0) { errno = EXDEV; return -1; } - SHADOW2_NEXT2_SMB_FNAME(RENAME, - (handle, smb_fname_src, smb_fname_dst)); + if (timestamp_dst != 0) { + errno = EROFS; + return -1; + } + return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst); } static int shadow_copy2_symlink(vfs_handle_struct *handle, const char *oldname, const char *newname) { - SHADOW2_NEXT2(SYMLINK, (handle, oldname, newname)); -} + time_t timestamp_old, timestamp_new; -static int shadow_copy2_link(vfs_handle_struct *handle, - const char *oldname, const char *newname) -{ - SHADOW2_NEXT2(LINK, (handle, oldname, newname)); + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, oldname, + ×tamp_old, NULL)) { + return -1; + } + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, newname, + ×tamp_new, NULL)) { + return -1; + } + if ((timestamp_old != 0) || (timestamp_new != 0)) { + errno = EROFS; + return -1; + } + return SMB_VFS_NEXT_SYMLINK(handle, oldname, newname); } -static int shadow_copy2_open(vfs_handle_struct *handle, - struct smb_filename *smb_fname, files_struct *fsp, - int flags, mode_t mode) +static int shadow_copy2_link(vfs_handle_struct *handle, + const char *oldname, const char *newname) { - SHADOW2_NEXT_SMB_FNAME(OPEN, - (handle, smb_fname, fsp, flags, mode), - int, -1); -} + time_t timestamp_old, timestamp_new; -static SMB_STRUCT_DIR *shadow_copy2_opendir(vfs_handle_struct *handle, - const char *fname, const char *mask, uint32 attr) -{ - SHADOW2_NEXT(OPENDIR, (handle, name, mask, attr), SMB_STRUCT_DIR *, NULL); + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, oldname, + ×tamp_old, NULL)) { + return -1; + } + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, newname, + ×tamp_new, NULL)) { + return -1; + } + if ((timestamp_old != 0) || (timestamp_new != 0)) { + errno = EROFS; + return -1; + } + return SMB_VFS_NEXT_LINK(handle, oldname, newname); } static int shadow_copy2_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname) { - _SHADOW2_NEXT_SMB_FNAME(STAT, (handle, smb_fname), int, -1, - convert_sbuf(handle, smb_fname->base_name, - &smb_fname->st)); + time_t timestamp; + char *stripped, *tmp; + int ret, saved_errno; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, + smb_fname->base_name, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_STAT(handle, smb_fname); + } + + tmp = smb_fname->base_name; + smb_fname->base_name = shadow_copy2_convert( + talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + + if (smb_fname->base_name == NULL) { + smb_fname->base_name = tmp; + return -1; + } + + ret = SMB_VFS_NEXT_STAT(handle, smb_fname); + saved_errno = errno; + + TALLOC_FREE(smb_fname->base_name); + smb_fname->base_name = tmp; + + if (ret == 0) { + convert_sbuf(handle, smb_fname->base_name, &smb_fname->st); + } + errno = saved_errno; + return ret; } static int shadow_copy2_lstat(vfs_handle_struct *handle, struct smb_filename *smb_fname) { - _SHADOW2_NEXT_SMB_FNAME(LSTAT, (handle, smb_fname), int, -1, - convert_sbuf(handle, smb_fname->base_name, - &smb_fname->st)); + time_t timestamp; + char *stripped, *tmp; + int ret, saved_errno; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, + smb_fname->base_name, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_LSTAT(handle, smb_fname); + } + + tmp = smb_fname->base_name; + smb_fname->base_name = shadow_copy2_convert( + talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + + if (smb_fname->base_name == NULL) { + smb_fname->base_name = tmp; + return -1; + } + + ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname); + saved_errno = errno; + + TALLOC_FREE(smb_fname->base_name); + smb_fname->base_name = tmp; + + if (ret == 0) { + convert_sbuf(handle, smb_fname->base_name, &smb_fname->st); + } + errno = saved_errno; + return ret; } -static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp, SMB_STRUCT_STAT *sbuf) +static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp, + SMB_STRUCT_STAT *sbuf) { - int ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf); - if (ret == 0 && shadow_copy2_match_name(fsp->fsp_name->base_name, NULL)) { + time_t timestamp; + int ret; + + ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf); + if (ret == -1) { + return ret; + } + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, + fsp->fsp_name->base_name, + ×tamp, NULL)) { + return 0; + } + if (timestamp != 0) { convert_sbuf(handle, fsp->fsp_name->base_name, sbuf); } + return 0; +} + +static int shadow_copy2_open(vfs_handle_struct *handle, + struct smb_filename *smb_fname, files_struct *fsp, + int flags, mode_t mode) +{ + time_t timestamp; + char *stripped, *tmp; + int ret, saved_errno; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, + smb_fname->base_name, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode); + } + + tmp = smb_fname->base_name; + smb_fname->base_name = shadow_copy2_convert( + talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + + if (smb_fname->base_name == NULL) { + smb_fname->base_name = tmp; + return -1; + } + + ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode); + saved_errno = errno; + + TALLOC_FREE(smb_fname->base_name); + smb_fname->base_name = tmp; + + errno = saved_errno; return ret; } static int shadow_copy2_unlink(vfs_handle_struct *handle, - const struct smb_filename *smb_fname_in) + const struct smb_filename *smb_fname) { - struct smb_filename *smb_fname = NULL; + time_t timestamp; + char *stripped; + int ret, saved_errno; + struct smb_filename *conv; NTSTATUS status; - status = copy_smb_filename(talloc_tos(), smb_fname_in, &smb_fname); + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, + smb_fname->base_name, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_UNLINK(handle, smb_fname); + } + status = copy_smb_filename(talloc_tos(), smb_fname, &conv); if (!NT_STATUS_IS_OK(status)) { - errno = map_errno_from_nt_status(status); + errno = ENOMEM; return -1; } - - SHADOW2_NEXT_SMB_FNAME(UNLINK, (handle, smb_fname), int, -1); + conv->base_name = shadow_copy2_convert( + conv, handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv->base_name == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_UNLINK(handle, conv); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; } -static int shadow_copy2_chmod(vfs_handle_struct *handle, - const char *fname, mode_t mode) +static int shadow_copy2_chmod(vfs_handle_struct *handle, const char *fname, + mode_t mode) { - SHADOW2_NEXT(CHMOD, (handle, name, mode), int, -1); + time_t timestamp; + char *stripped; + int ret, saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_CHMOD(handle, fname, mode); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_CHMOD(handle, conv, mode); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; } -static int shadow_copy2_chown(vfs_handle_struct *handle, - const char *fname, uid_t uid, gid_t gid) +static int shadow_copy2_chown(vfs_handle_struct *handle, const char *fname, + uid_t uid, gid_t gid) { - SHADOW2_NEXT(CHOWN, (handle, name, uid, gid), int, -1); + time_t timestamp; + char *stripped; + int ret, saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_CHOWN(handle, fname, uid, gid); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_CHOWN(handle, conv, uid, gid); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; } static int shadow_copy2_chdir(vfs_handle_struct *handle, - const char *fname) + const char *fname) { - SHADOW2_NEXT(CHDIR, (handle, name), int, -1); + time_t timestamp; + char *stripped; + int ret, saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_CHDIR(handle, fname); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_CHDIR(handle, conv); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; } static int shadow_copy2_ntimes(vfs_handle_struct *handle, - const struct smb_filename *smb_fname_in, + const struct smb_filename *smb_fname, struct smb_file_time *ft) { - struct smb_filename *smb_fname = NULL; + time_t timestamp; + char *stripped; + int ret, saved_errno; + struct smb_filename *conv; NTSTATUS status; - status = copy_smb_filename(talloc_tos(), smb_fname_in, &smb_fname); + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, + smb_fname->base_name, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft); + } + status = copy_smb_filename(talloc_tos(), smb_fname, &conv); if (!NT_STATUS_IS_OK(status)) { - errno = map_errno_from_nt_status(status); + errno = ENOMEM; return -1; } - - SHADOW2_NEXT_SMB_FNAME(NTIMES, (handle, smb_fname, ft), int, -1); + conv->base_name = shadow_copy2_convert( + conv, handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv->base_name == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_NTIMES(handle, conv, ft); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; } static int shadow_copy2_readlink(vfs_handle_struct *handle, const char *fname, char *buf, size_t bufsiz) { - SHADOW2_NEXT(READLINK, (handle, name, buf, bufsiz), int, -1); -} + time_t timestamp; + char *stripped; + int ret, saved_errno; + char *conv; -static int shadow_copy2_mknod(vfs_handle_struct *handle, - const char *fname, mode_t mode, SMB_DEV_T dev) -{ - SHADOW2_NEXT(MKNOD, (handle, name, mode, dev), int, -1); + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_READLINK(handle, fname, buf, bufsiz); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_READLINK(handle, conv, buf, bufsiz); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; } -static char *shadow_copy2_realpath(vfs_handle_struct *handle, - const char *fname) +static int shadow_copy2_mknod(vfs_handle_struct *handle, + const char *fname, mode_t mode, SMB_DEV_T dev) { - const char *gmt; - - if (shadow_copy2_match_name(fname, &gmt) - && (gmt[GMT_NAME_LEN] == '\0')) { - char *copy; - - copy = talloc_strdup(talloc_tos(), fname); - if (copy == NULL) { - errno = ENOMEM; - return NULL; - } - - copy[gmt - fname] = '.'; - copy[gmt - fname + 1] = '\0'; + time_t timestamp; + char *stripped; + int ret, saved_errno; + char *conv; - DEBUG(10, ("calling NEXT_REALPATH with %s\n", copy)); - SHADOW2_NEXT(REALPATH, (handle, name), char *, - NULL); + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_MKNOD(handle, fname, mode, dev); } - SHADOW2_NEXT(REALPATH, (handle, name), char *, NULL); + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_MKNOD(handle, conv, mode, dev); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; } -static const char *shadow_copy2_connectpath(struct vfs_handle_struct *handle, - const char *fname) +static char *shadow_copy2_realpath(vfs_handle_struct *handle, + const char *fname) { - TALLOC_CTX *tmp_ctx; - const char *snapdir, *baseoffset, *basedir, *gmt_start; - size_t baselen; - char *ret; - - DEBUG(10, ("shadow_copy2_connectpath called with %s\n", fname)); - - if (!shadow_copy2_match_name(fname, &gmt_start)) { - return handle->conn->connectpath; + time_t timestamp; + char *stripped = NULL; + char *tmp = NULL; + char *result = NULL; + char *inserted = NULL; + char *inserted_to, *inserted_end; + int saved_errno; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + goto done; } - - /* - * We have to create a real temporary context because we have - * to put our result on talloc_tos(). Thus we can't use a - * talloc_stackframe() here. - */ - tmp_ctx = talloc_new(talloc_tos()); - - fname = shadow_copy2_normalise_path(tmp_ctx, fname, gmt_start); - if (fname == NULL) { - TALLOC_FREE(tmp_ctx); - return NULL; + if (timestamp == 0) { + return SMB_VFS_NEXT_REALPATH(handle, fname); } - snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle); - if (snapdir == NULL) { - DEBUG(2,("no snapdir found for share at %s\n", - handle->conn->connectpath)); - TALLOC_FREE(tmp_ctx); - return NULL; + tmp = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + if (tmp == NULL) { + goto done; } - basedir = shadow_copy2_find_basedir(tmp_ctx, handle); - if (basedir == NULL) { - DEBUG(2,("no basedir found for share at %s\n", - handle->conn->connectpath)); - TALLOC_FREE(tmp_ctx); - return NULL; + result = SMB_VFS_NEXT_REALPATH(handle, tmp); + if (result == NULL) { + goto done; } - baselen = strlen(basedir); - baseoffset = handle->conn->connectpath + baselen; - - /* some sanity checks */ - if (strncmp(basedir, handle->conn->connectpath, baselen) != 0 || - (handle->conn->connectpath[baselen] != 0 - && handle->conn->connectpath[baselen] != '/')) { - DEBUG(0,("shadow_copy2_connectpath: basedir %s is not a " - "parent of %s\n", basedir, - handle->conn->connectpath)); - TALLOC_FREE(tmp_ctx); - return NULL; + /* + * Take away what we've inserted. This removes the @GMT-thingy + * completely, but will give a path under the share root. + */ + inserted = shadow_copy2_insert_string(talloc_tos(), handle, timestamp); + if (inserted == NULL) { + goto done; } - - if (*baseoffset == '/') baseoffset++; - - ret = talloc_asprintf(talloc_tos(), "%s/%.*s/%s", - snapdir, - GMT_NAME_LEN, fname, - baseoffset); - DEBUG(6,("shadow_copy2_connectpath: '%s' -> '%s'\n", fname, ret)); - TALLOC_FREE(tmp_ctx); - return ret; + inserted_to = strstr_m(result, inserted); + if (inserted_to == NULL) { + DEBUG(2, ("SMB_VFS_NEXT_REALPATH removed %s\n", inserted)); + goto done; + } + inserted_end = inserted_to + talloc_get_size(inserted) - 1; + memmove(inserted_to, inserted_end, strlen(inserted_end)+1); + +done: + saved_errno = errno; + TALLOC_FREE(inserted); + TALLOC_FREE(tmp); + TALLOC_FREE(stripped); + errno = saved_errno; + return result; } -static NTSTATUS shadow_copy2_get_nt_acl(vfs_handle_struct *handle, - const char *fname, uint32 security_info, - struct security_descriptor **ppdesc) +static char *have_snapdir(struct vfs_handle_struct *handle, + const char *path) { - SHADOW2_NTSTATUS_NEXT(GET_NT_ACL, (handle, name, security_info, ppdesc), NT_STATUS_ACCESS_DENIED); -} + struct smb_filename smb_fname; + int ret; + + ZERO_STRUCT(smb_fname); + smb_fname.base_name = talloc_asprintf( + talloc_tos(), "%s/%s", path, + lp_parm_const_string(SNUM(handle->conn), "shadow", "snapdir", + ".snapshots")); + if (smb_fname.base_name == NULL) { + return NULL; + } -static int shadow_copy2_mkdir(vfs_handle_struct *handle, const char *fname, mode_t mode) -{ - SHADOW2_NEXT(MKDIR, (handle, name, mode), int, -1); + ret = SMB_VFS_NEXT_STAT(handle, &smb_fname); + if ((ret == 0) && (S_ISDIR(smb_fname.st.st_ex_mode))) { + return smb_fname.base_name; + } + TALLOC_FREE(smb_fname.base_name); + return NULL; } -static int shadow_copy2_rmdir(vfs_handle_struct *handle, const char *fname) +static char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx, + struct vfs_handle_struct *handle, + struct smb_filename *smb_fname) { - SHADOW2_NEXT(RMDIR, (handle, name), int, -1); -} + char *path, *p; + char *snapdir; -static int shadow_copy2_chflags(vfs_handle_struct *handle, const char *fname, - unsigned int flags) -{ - SHADOW2_NEXT(CHFLAGS, (handle, name, flags), int, -1); -} + path = talloc_asprintf(mem_ctx, "%s/%s", + handle->conn->connectpath, + smb_fname->base_name); + if (path == NULL) { + return NULL; + } -static ssize_t shadow_copy2_getxattr(vfs_handle_struct *handle, - const char *fname, const char *aname, void *value, size_t size) -{ - SHADOW2_NEXT(GETXATTR, (handle, name, aname, value, size), ssize_t, -1); -} + snapdir = have_snapdir(handle, path); + if (snapdir != NULL) { + TALLOC_FREE(path); + return snapdir; + } -static ssize_t shadow_copy2_lgetxattr(vfs_handle_struct *handle, - const char *fname, const char *aname, void *value, size_t size) -{ - SHADOW2_NEXT(LGETXATTR, (handle, name, aname, value, size), ssize_t, -1); -} + while ((p = strrchr(path, '/')) && (p > path)) { -static ssize_t shadow_copy2_listxattr(struct vfs_handle_struct *handle, const char *fname, - char *list, size_t size) -{ - SHADOW2_NEXT(LISTXATTR, (handle, name, list, size), ssize_t, -1); -} + p[0] = '\0'; -static int shadow_copy2_removexattr(struct vfs_handle_struct *handle, const char *fname, - const char *aname) -{ - SHADOW2_NEXT(REMOVEXATTR, (handle, name, aname), int, -1); + snapdir = have_snapdir(handle, path); + if (snapdir != NULL) { + TALLOC_FREE(path); + return snapdir; + } + } + TALLOC_FREE(path); + return NULL; } -static int shadow_copy2_lremovexattr(struct vfs_handle_struct *handle, const char *fname, - const char *aname) +static bool shadow_copy2_snapshot_to_gmt(TALLOC_CTX *mem_ctx, + vfs_handle_struct *handle, + const char *name, + char *gmt, size_t gmt_len) { - SHADOW2_NEXT(LREMOVEXATTR, (handle, name, aname), int, -1); -} + struct tm timestamp; + time_t timestamp_t; + const char *fmt; -static int shadow_copy2_setxattr(struct vfs_handle_struct *handle, const char *fname, - const char *aname, const void *value, size_t size, int flags) -{ - SHADOW2_NEXT(SETXATTR, (handle, name, aname, value, size, flags), int, -1); -} + fmt = lp_parm_const_string(SNUM(handle->conn), "shadow", + "format", GMT_FORMAT); -static int shadow_copy2_lsetxattr(struct vfs_handle_struct *handle, const char *fname, - const char *aname, const void *value, size_t size, int flags) -{ - SHADOW2_NEXT(LSETXATTR, (handle, name, aname, value, size, flags), int, -1); -} + ZERO_STRUCT(timestamp); + if (strptime(name, fmt, ×tamp) == NULL) { + DEBUG(10, ("shadow_copy2_snapshot_to_gmt: no match %s: %s\n", + fmt, name)); + return false; + } -static int shadow_copy2_chmod_acl(vfs_handle_struct *handle, - const char *fname, mode_t mode) -{ - SHADOW2_NEXT(CHMOD_ACL, (handle, name, mode), int, -1); + DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n", fmt, name)); + + if (lp_parm_bool(SNUM(handle->conn), "shadow", "localtime", false)) { + timestamp.tm_isdst = -1; + timestamp_t = mktime(×tamp); + gmtime_r(×tamp_t, ×tamp); + } + strftime(gmt, gmt_len, GMT_FORMAT, ×tamp); + return true; } static int shadow_copy2_label_cmp_asc(const void *x, const void *y) { - return strncmp((char *)x, (char *)y, sizeof(SHADOW_COPY_LABEL)); + return strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL)); } static int shadow_copy2_label_cmp_desc(const void *x, const void *y) { - return -strncmp((char *)x, (char *)y, sizeof(SHADOW_COPY_LABEL)); + return -strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL)); } /* sort the shadow copy data in ascending or descending order */ static void shadow_copy2_sort_data(vfs_handle_struct *handle, - SHADOW_COPY_DATA *shadow_copy2_data) + struct shadow_copy_data *shadow_copy2_data) { int (*cmpfunc)(const void *, const void *); const char *sort; sort = lp_parm_const_string(SNUM(handle->conn), "shadow", - "sort", SHADOW_COPY2_DEFAULT_SORT); + "sort", NULL); if (sort == NULL) { return; } @@ -867,18 +1072,17 @@ static void shadow_copy2_sort_data(vfs_handle_struct *handle, return; } -static int shadow_copy2_get_shadow_copy2_data(vfs_handle_struct *handle, - files_struct *fsp, - SHADOW_COPY_DATA *shadow_copy2_data, - bool labels) +static int shadow_copy2_get_shadow_copy_data( + vfs_handle_struct *handle, files_struct *fsp, + struct shadow_copy_data *shadow_copy2_data, + bool labels) { SMB_STRUCT_DIR *p; const char *snapdir; SMB_STRUCT_DIRENT *d; - TALLOC_CTX *tmp_ctx = talloc_new(handle->data); - char *snapshot; + TALLOC_CTX *tmp_ctx = talloc_stackframe(); - snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle); + snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle, fsp->fsp_name); if (snapdir == NULL) { DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n", handle->conn->connectpath)); @@ -901,16 +1105,23 @@ static int shadow_copy2_get_shadow_copy2_data(vfs_handle_struct *handle, shadow_copy2_data->labels = NULL; while ((d = SMB_VFS_NEXT_READDIR(handle, p, NULL))) { + char snapshot[GMT_NAME_LEN+1]; SHADOW_COPY_LABEL *tlabels; - /* ignore names not of the right form in the snapshot directory */ - snapshot = shadow_copy2_snapshot_to_gmt(tmp_ctx, handle, - d->d_name); - DEBUG(6,("shadow_copy2_get_shadow_copy2_data: %s -> %s\n", - d->d_name, snapshot)); - if (!snapshot) { + /* + * ignore names not of the right form in the snapshot + * directory + */ + if (!shadow_copy2_snapshot_to_gmt( + tmp_ctx, handle, d->d_name, + snapshot, sizeof(snapshot))) { + + DEBUG(6, ("shadow_copy2_get_shadow_copy_data: " + "ignoring %s\n", d->d_name)); continue; } + DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n", + d->d_name, snapshot)); if (!labels) { /* the caller doesn't want the labels */ @@ -918,9 +1129,10 @@ static int shadow_copy2_get_shadow_copy2_data(vfs_handle_struct *handle, continue; } - tlabels = talloc_realloc(shadow_copy2_data->mem_ctx, + tlabels = talloc_realloc(shadow_copy2_data, shadow_copy2_data->labels, - SHADOW_COPY_LABEL, shadow_copy2_data->num_volumes+1); + SHADOW_COPY_LABEL, + shadow_copy2_data->num_volumes+1); if (tlabels == NULL) { DEBUG(0,("shadow_copy2: out of memory\n")); SMB_VFS_NEXT_CLOSEDIR(handle, p); @@ -930,7 +1142,6 @@ static int shadow_copy2_get_shadow_copy2_data(vfs_handle_struct *handle, strlcpy(tlabels[shadow_copy2_data->num_volumes], snapshot, sizeof(*tlabels)); - talloc_free(snapshot); shadow_copy2_data->num_volumes++; shadow_copy2_data->labels = tlabels; @@ -944,59 +1155,455 @@ static int shadow_copy2_get_shadow_copy2_data(vfs_handle_struct *handle, return 0; } -static struct vfs_fn_pointers vfs_shadow_copy2_fns = { - .opendir = shadow_copy2_opendir, - .mkdir = shadow_copy2_mkdir, - .rmdir = shadow_copy2_rmdir, - .chflags = shadow_copy2_chflags, - .getxattr = shadow_copy2_getxattr, - .lgetxattr = shadow_copy2_lgetxattr, - .listxattr = shadow_copy2_listxattr, - .removexattr = shadow_copy2_removexattr, - .lremovexattr = shadow_copy2_lremovexattr, - .setxattr = shadow_copy2_setxattr, - .lsetxattr = shadow_copy2_lsetxattr, - .open_fn = shadow_copy2_open, - .rename = shadow_copy2_rename, - .stat = shadow_copy2_stat, - .lstat = shadow_copy2_lstat, - .fstat = shadow_copy2_fstat, - .unlink = shadow_copy2_unlink, - .chmod = shadow_copy2_chmod, - .chown = shadow_copy2_chown, - .chdir = shadow_copy2_chdir, - .ntimes = shadow_copy2_ntimes, - .symlink = shadow_copy2_symlink, - .vfs_readlink = shadow_copy2_readlink, - .link = shadow_copy2_link, - .mknod = shadow_copy2_mknod, - .realpath = shadow_copy2_realpath, - .connectpath = shadow_copy2_connectpath, - .get_nt_acl = shadow_copy2_get_nt_acl, - .chmod_acl = shadow_copy2_chmod_acl, - .get_shadow_copy_data = shadow_copy2_get_shadow_copy2_data, -}; +static NTSTATUS shadow_copy2_fget_nt_acl(vfs_handle_struct *handle, + struct files_struct *fsp, + uint32 security_info, + struct security_descriptor **ppdesc) +{ + time_t timestamp; + char *stripped; + NTSTATUS status; + char *conv; -NTSTATUS vfs_shadow_copy2_init(void); -NTSTATUS vfs_shadow_copy2_init(void) + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, + fsp->fsp_name->base_name, + ×tamp, &stripped)) { + return map_nt_error_from_unix(errno); + } + if (timestamp == 0) { + return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info, + ppdesc); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return map_nt_error_from_unix(errno); + } + status = SMB_VFS_NEXT_GET_NT_ACL(handle, conv, security_info, ppdesc); + TALLOC_FREE(conv); + return status; +} + +static NTSTATUS shadow_copy2_get_nt_acl(vfs_handle_struct *handle, + const char *fname, + uint32 security_info, + struct security_descriptor **ppdesc) +{ + time_t timestamp; + char *stripped; + NTSTATUS status; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return map_nt_error_from_unix(errno); + } + if (timestamp == 0) { + return SMB_VFS_NEXT_GET_NT_ACL(handle, fname, security_info, + ppdesc); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return map_nt_error_from_unix(errno); + } + status = SMB_VFS_NEXT_GET_NT_ACL(handle, conv, security_info, ppdesc); + TALLOC_FREE(conv); + return status; +} + +static int shadow_copy2_mkdir(vfs_handle_struct *handle, + const char *fname, mode_t mode) { - NTSTATUS ret; + time_t timestamp; + char *stripped; + int ret, saved_errno; + char *conv; - ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "shadow_copy2", - &vfs_shadow_copy2_fns); + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_MKDIR(handle, fname, mode); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_MKDIR(handle, conv, mode); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} - if (!NT_STATUS_IS_OK(ret)) - return ret; +static int shadow_copy2_rmdir(vfs_handle_struct *handle, const char *fname) +{ + time_t timestamp; + char *stripped; + int ret, saved_errno; + char *conv; - vfs_shadow_copy2_debug_level = debug_add_class("shadow_copy2"); - if (vfs_shadow_copy2_debug_level == -1) { - vfs_shadow_copy2_debug_level = DBGC_VFS; - DEBUG(0, ("%s: Couldn't register custom debugging class!\n", - "vfs_shadow_copy2_init")); - } else { - DEBUG(10, ("%s: Debug class number of '%s': %d\n", - "vfs_shadow_copy2_init","shadow_copy2",vfs_shadow_copy2_debug_level)); + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_RMDIR(handle, fname); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_RMDIR(handle, conv); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} + +static int shadow_copy2_chflags(vfs_handle_struct *handle, const char *fname, + unsigned int flags) +{ + time_t timestamp; + char *stripped; + int ret, saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_CHFLAGS(handle, fname, flags); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_CHFLAGS(handle, conv, flags); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} + +static ssize_t shadow_copy2_getxattr(vfs_handle_struct *handle, + const char *fname, const char *aname, + void *value, size_t size) +{ + time_t timestamp; + char *stripped; + ssize_t ret; + int saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_GETXATTR(handle, fname, aname, value, + size); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_GETXATTR(handle, conv, aname, value, size); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} + +static ssize_t shadow_copy2_lgetxattr(vfs_handle_struct *handle, + const char *fname, const char *aname, + void *value, size_t size) +{ + time_t timestamp; + char *stripped; + ssize_t ret; + int saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_LGETXATTR(handle, fname, aname, value, + size); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_LGETXATTR(handle, conv, aname, value, size); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} + +static ssize_t shadow_copy2_listxattr(struct vfs_handle_struct *handle, + const char *fname, + char *list, size_t size) +{ + time_t timestamp; + char *stripped; + ssize_t ret; + int saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_LISTXATTR(handle, fname, list, size); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_LISTXATTR(handle, conv, list, size); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} + +static int shadow_copy2_removexattr(vfs_handle_struct *handle, + const char *fname, const char *aname) +{ + time_t timestamp; + char *stripped; + int ret, saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_REMOVEXATTR(handle, fname, aname); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_REMOVEXATTR(handle, conv, aname); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} + +static int shadow_copy2_lremovexattr(vfs_handle_struct *handle, + const char *fname, const char *aname) +{ + time_t timestamp; + char *stripped; + int ret, saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_LREMOVEXATTR(handle, fname, aname); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_LREMOVEXATTR(handle, conv, aname); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} + +static int shadow_copy2_setxattr(struct vfs_handle_struct *handle, + const char *fname, + const char *aname, const void *value, + size_t size, int flags) +{ + time_t timestamp; + char *stripped; + ssize_t ret; + int saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_SETXATTR(handle, fname, aname, value, size, + flags); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_SETXATTR(handle, conv, aname, value, size, flags); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} + +static int shadow_copy2_lsetxattr(struct vfs_handle_struct *handle, + const char *fname, + const char *aname, const void *value, + size_t size, int flags) +{ + time_t timestamp; + char *stripped; + ssize_t ret; + int saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_LSETXATTR(handle, fname, aname, value, + size, flags); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_LSETXATTR(handle, conv, aname, value, size, flags); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} + +static int shadow_copy2_chmod_acl(vfs_handle_struct *handle, + const char *fname, mode_t mode) +{ + time_t timestamp; + char *stripped; + ssize_t ret; + int saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname, + ×tamp, &stripped)) { + return -1; } + if (timestamp == 0) { + return SMB_VFS_NEXT_CHMOD_ACL(handle, fname, mode); + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_CHMOD_ACL(handle, conv, mode); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; + return ret; +} +static int shadow_copy2_get_real_filename(struct vfs_handle_struct *handle, + const char *path, + const char *name, + TALLOC_CTX *mem_ctx, + char **found_name) +{ + time_t timestamp; + char *stripped; + ssize_t ret; + int saved_errno; + char *conv; + + if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, path, + ×tamp, &stripped)) { + return -1; + } + if (timestamp == 0) { + return SMB_VFS_NEXT_GET_REAL_FILENAME(handle, path, name, + mem_ctx, found_name); + } + if (stripped[0] == '\0') { + *found_name = talloc_strdup(mem_ctx, name); + if (*found_name == NULL) { + errno = ENOMEM; + return -1; + } + return 0; + } + conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp); + TALLOC_FREE(stripped); + if (conv == NULL) { + return -1; + } + ret = SMB_VFS_NEXT_GET_REAL_FILENAME(handle, conv, name, + mem_ctx, found_name); + saved_errno = errno; + TALLOC_FREE(conv); + errno = saved_errno; return ret; } + + +static struct vfs_fn_pointers vfs_shadow_copy2_fns = { + .opendir = shadow_copy2_opendir, + .rename = shadow_copy2_rename, + .link = shadow_copy2_link, + .symlink = shadow_copy2_symlink, + .stat = shadow_copy2_stat, + .lstat = shadow_copy2_lstat, + .fstat = shadow_copy2_fstat, + .open_fn = shadow_copy2_open, + .unlink = shadow_copy2_unlink, + .chmod = shadow_copy2_chmod, + .chown = shadow_copy2_chown, + .chdir = shadow_copy2_chdir, + .ntimes = shadow_copy2_ntimes, + .vfs_readlink = shadow_copy2_readlink, + .mknod = shadow_copy2_mknod, + .realpath = shadow_copy2_realpath, + .get_nt_acl = shadow_copy2_get_nt_acl, + .fget_nt_acl = shadow_copy2_fget_nt_acl, + .get_shadow_copy_data = shadow_copy2_get_shadow_copy_data, + .mkdir = shadow_copy2_mkdir, + .rmdir = shadow_copy2_rmdir, + .getxattr = shadow_copy2_getxattr, + .lgetxattr = shadow_copy2_lgetxattr, + .listxattr = shadow_copy2_listxattr, + .removexattr = shadow_copy2_removexattr, + .lremovexattr = shadow_copy2_lremovexattr, + .setxattr = shadow_copy2_setxattr, + .lsetxattr = shadow_copy2_lsetxattr, + .chmod_acl = shadow_copy2_chmod_acl, + .chflags = shadow_copy2_chflags, + .get_real_filename = shadow_copy2_get_real_filename, +}; + +NTSTATUS vfs_shadow_copy2_init(void); +NTSTATUS vfs_shadow_copy2_init(void) +{ + return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, + "shadow_copy2", &vfs_shadow_copy2_fns); +} |