diff options
Diffstat (limited to 'source3/modules/vfs_shadow_copy2.c')
| -rw-r--r-- | source3/modules/vfs_shadow_copy2.c | 637 |
1 files changed, 637 insertions, 0 deletions
diff --git a/source3/modules/vfs_shadow_copy2.c b/source3/modules/vfs_shadow_copy2.c new file mode 100644 index 0000000000..ddbc5aab18 --- /dev/null +++ b/source3/modules/vfs_shadow_copy2.c @@ -0,0 +1,637 @@ +/* + * implementation of an Shadow Copy module - version 2 + * + * Copyright (C) Andrew Tridgell 2007 + * + * 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" + +/* + + This is a 2nd implemetation of a shadow copy module for exposing + snapshots to windows clients as shadow copies. This version has the + following features: + + 1) you don't need to populate your shares with symlinks to the + snapshots. This can be very important when you have thousands of + shares, or use [homes] + + 2) the inode number of the files is altered so it is different + from the original. This allows the 'restore' button to work + without a sharing violation + + Module options: + + shadow:snapdir = <directory where snapshots are kept> + + This is the directory containing the @GMT-* snapshot directories. If it is an absolute + path it is used as-is. If it is a relative path, then it is taken relative to the mount + point of the filesystem that the root of this share is on + + shadow:basedir = <base directory that snapshots are from> + + This is an optional parameter that specifies the directory that + the snapshots are relative to. It defaults to the filesystem + mount point + + shadow:fixinodes = yes/no + + If you enable shadow:fixinodes then this module will modify the + apparent inode number of files in the snapshot directories using + a hash of the files path. This is needed for snapshot systems + where the snapshots have the same device:inode number as the + original files (such as happens with GPFS snapshots). If you + don't set this option then the 'restore' button in the shadow + copy UI will fail with a sharing violation. + + Note that the directory names in the snapshot directory must take the form + @GMT-YYYY.MM.DD-HH.MM.SS + + The following command would generate a correctly formatted directory name: + 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 + +#define GMT_NAME_LEN 24 /* length of a @GMT- name */ + +/* + make very sure it is one of our special names + */ +static inline bool shadow_copy2_match_name(const char *name) +{ + unsigned year, month, day, hr, min, sec; + if (name[0] != '@') return False; + if (strncmp(name, "@GMT-", 5) != 0) return False; + if (sscanf(name, "@GMT-%04u.%02u.%02u-%02u.%02u.%02u", &year, &month, + &day, &hr, &min, &sec) != 6) { + return False; + } + if (name[24] != 0 && name[24] != '/') { + return False; + } + return True; +} + +/* + convert a name to the shadow directory + */ + +#define _SHADOW2_NEXT(op, args, rtype, eret, extra) do { \ + const char *name = fname; \ + if (shadow_copy2_match_name(fname)) { \ + char *name2; \ + rtype ret; \ + name2 = convert_shadow2_name(handle, fname); \ + 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) + +/* + convert a name to the shadow directory: NTSTATUS-specific handling + */ + +#define _SHADOW2_NTSTATUS_NEXT(op, args, eret, extra) do { \ + const char *name = fname; \ + if (shadow_copy2_match_name(fname)) { \ + char *name2; \ + NTSTATUS ret; \ + name2 = convert_shadow2_name(handle, fname); \ + 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_NEXT2(op, args) do { \ + if (shadow_copy2_match_name(oldname) || shadow_copy2_match_name(newname)) { \ + errno = EROFS; \ + return -1; \ + } else { \ + return SMB_VFS_NEXT_ ## op args; \ + } \ +} while (0) + + +/* + find the mount point of a filesystem + */ +static char *find_mount_point(TALLOC_CTX *mem_ctx, vfs_handle_struct *handle) +{ + char *path = talloc_strdup(mem_ctx, handle->conn->connectpath); + dev_t dev; + struct stat st; + char *p; + + if (stat(path, &st) != 0) { + talloc_free(path); + return NULL; + } + + dev = st.st_dev; + + while ((p = strrchr(path, '/')) && p > path) { + *p = 0; + if (stat(path, &st) != 0) { + talloc_free(path); + return NULL; + } + if (st.st_dev != dev) { + *p = '/'; + break; + } + } + + 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) +{ + 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; + } + + /* 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); + + /* other its the filesystem mount point */ + if (basedir == NULL) { + basedir = find_mount_point(mem_ctx, handle); + } + + 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) +{ + TALLOC_CTX *tmp_ctx = talloc_new(handle->data); + const char *snapdir, *relpath, *baseoffset, *basedir; + size_t baselen; + char *ret; + + 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; + } + + 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; + } + + relpath = fname + GMT_NAME_LEN; + 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,("convert_shadow2_name: basedir %s is not a parent of %s\n", + basedir, handle->conn->connectpath)); + talloc_free(tmp_ctx); + return NULL; + } + + if (*relpath == '/') relpath++; + if (*baseoffset == '/') baseoffset++; + + ret = talloc_asprintf(handle->data, "%s/%.*s/%s/%s", + snapdir, + GMT_NAME_LEN, fname, + baseoffset, + relpath); + DEBUG(6,("convert_shadow2_name: '%s' -> '%s'\n", fname, ret)); + talloc_free(tmp_ctx); + return ret; +} + + +/* + simple string hash + */ +static uint32 string_hash(const char *s) +{ + uint32 n = 0; + while (*s) { + n = ((n << 5) + n) ^ (uint32)(*s++); + } + return n; +} + +/* + 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) +{ + 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 + GUI, as the client gets a sharing violation. + + This is a crude way of allowing both files to be + open at once. It has a slight chance of inode + number collision, but I can't see a better approach + without significant VFS changes + */ + uint32_t shash = string_hash(fname) & 0xFF000000; + if (shash == 0) { + shash = 1; + } + sbuf->st_ino ^= shash; + } +} + +static int shadow_copy2_rename(vfs_handle_struct *handle, + const char *oldname, const char *newname) +{ + SHADOW2_NEXT2(RENAME, (handle, oldname, newname)); +} + +static int shadow_copy2_symlink(vfs_handle_struct *handle, + const char *oldname, const char *newname) +{ + SHADOW2_NEXT2(SYMLINK, (handle, oldname, newname)); +} + +static int shadow_copy2_link(vfs_handle_struct *handle, + const char *oldname, const char *newname) +{ + SHADOW2_NEXT2(LINK, (handle, oldname, newname)); +} + +static int shadow_copy2_open(vfs_handle_struct *handle, + const char *fname, files_struct *fsp, int flags, mode_t mode) +{ + SHADOW2_NEXT(OPEN, (handle, name, fsp, flags, mode), int, -1); +} + +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); +} + +static int shadow_copy2_stat(vfs_handle_struct *handle, + const char *fname, SMB_STRUCT_STAT *sbuf) +{ + _SHADOW2_NEXT(STAT, (handle, name, sbuf), int, -1, convert_sbuf(handle, fname, sbuf)); +} + +static int shadow_copy2_lstat(vfs_handle_struct *handle, + const char *fname, SMB_STRUCT_STAT *sbuf) +{ + _SHADOW2_NEXT(LSTAT, (handle, name, sbuf), int, -1, convert_sbuf(handle, fname, 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)) { + convert_sbuf(handle, fsp->fsp_name, sbuf); + } + return ret; +} + +static int shadow_copy2_unlink(vfs_handle_struct *handle, const char *fname) +{ + SHADOW2_NEXT(UNLINK, (handle, name), int, -1); +} + +static int shadow_copy2_chmod(vfs_handle_struct *handle, + const char *fname, mode_t mode) +{ + SHADOW2_NEXT(CHMOD, (handle, name, mode), int, -1); +} + +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); +} + +static int shadow_copy2_chdir(vfs_handle_struct *handle, + const char *fname) +{ + SHADOW2_NEXT(CHDIR, (handle, name), int, -1); +} + +static int shadow_copy2_ntimes(vfs_handle_struct *handle, + const char *fname, const struct timespec ts[2]) +{ + SHADOW2_NEXT(NTIMES, (handle, name, ts), int, -1); +} + +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); +} + +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); +} + +static char *shadow_copy2_realpath(vfs_handle_struct *handle, + const char *fname, char *resolved_path) +{ + SHADOW2_NEXT(REALPATH, (handle, name, resolved_path), char *, NULL); +} + +static NTSTATUS shadow_copy2_get_nt_acl(vfs_handle_struct *handle, + const char *fname, uint32 security_info, + struct security_descriptor **ppdesc) +{ + SHADOW2_NTSTATUS_NEXT(GET_NT_ACL, (handle, name, security_info, ppdesc), NT_STATUS_ACCESS_DENIED); +} + +static NTSTATUS shadow_copy2_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp, + const char *fname, uint32 security_info_sent, + struct security_descriptor *psd) +{ + SHADOW2_NTSTATUS_NEXT(SET_NT_ACL, (handle, fsp, name, security_info_sent, psd), NT_STATUS_ACCESS_DENIED); +} + +static int shadow_copy2_mkdir(vfs_handle_struct *handle, const char *fname, mode_t mode) +{ + SHADOW2_NEXT(MKDIR, (handle, name, mode), int, -1); +} + +static int shadow_copy2_rmdir(vfs_handle_struct *handle, const char *fname) +{ + SHADOW2_NEXT(RMDIR, (handle, name), int, -1); +} + +static int shadow_copy2_chflags(vfs_handle_struct *handle, const char *fname, int flags) +{ + SHADOW2_NEXT(CHFLAGS, (handle, name, flags), int, -1); +} + +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); +} + +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); +} + +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); +} + +static int shadow_copy2_removexattr(struct vfs_handle_struct *handle, const char *fname, + const char *aname) +{ + SHADOW2_NEXT(REMOVEXATTR, (handle, name, aname), int, -1); +} + +static int shadow_copy2_lremovexattr(struct vfs_handle_struct *handle, const char *fname, + const char *aname) +{ + SHADOW2_NEXT(LREMOVEXATTR, (handle, name, aname), int, -1); +} + +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); +} + +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); +} + +static int shadow_copy2_chmod_acl(vfs_handle_struct *handle, + const char *fname, mode_t mode) +{ + /* If the underlying VFS doesn't have ACL support... */ + if (!handle->vfs_next.ops.chmod_acl) { + errno = ENOSYS; + return -1; + } + SHADOW2_NEXT(CHMOD_ACL, (handle, name, mode), int, -1); +} + +static int shadow_copy2_get_shadow_copy2_data(vfs_handle_struct *handle, + files_struct *fsp, + 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); + + snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle); + if (snapdir == NULL) { + DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n", + handle->conn->connectpath)); + errno = EINVAL; + talloc_free(tmp_ctx); + return -1; + } + + p = SMB_VFS_NEXT_OPENDIR(handle, snapdir, NULL, 0); + + if (!p) { + DEBUG(0,("shadow_copy2: SMB_VFS_NEXT_OPENDIR() failed for '%s' - %s\n", + snapdir, strerror(errno))); + talloc_free(tmp_ctx); + return -1; + } + + talloc_free(tmp_ctx); + + shadow_copy2_data->num_volumes = 0; + shadow_copy2_data->labels = NULL; + + while ((d = SMB_VFS_NEXT_READDIR(handle, p))) { + SHADOW_COPY_LABEL *tlabels; + + /* ignore names not of the right form in the snapshot directory */ + if (!shadow_copy2_match_name(d->d_name)) { + continue; + } + + if (!labels) { + /* the caller doesn't want the labels */ + shadow_copy2_data->num_volumes++; + continue; + } + + tlabels = talloc_realloc(shadow_copy2_data->mem_ctx, + shadow_copy2_data->labels, + 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); + return -1; + } + + strlcpy(tlabels[shadow_copy2_data->num_volumes], d->d_name, sizeof(*tlabels)); + shadow_copy2_data->num_volumes++; + shadow_copy2_data->labels = tlabels; + } + + SMB_VFS_NEXT_CLOSEDIR(handle,p); + return 0; +} + +/* VFS operations structure */ + +static vfs_op_tuple shadow_copy2_ops[] = { + {SMB_VFS_OP(shadow_copy2_opendir), SMB_VFS_OP_OPENDIR, SMB_VFS_LAYER_TRANSPARENT}, + + /* directory operations */ + {SMB_VFS_OP(shadow_copy2_mkdir), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_rmdir), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_TRANSPARENT}, + + /* xattr and flags operations */ + {SMB_VFS_OP(shadow_copy2_chflags), SMB_VFS_OP_CHFLAGS, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_getxattr), SMB_VFS_OP_GETXATTR, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_lgetxattr), SMB_VFS_OP_LGETXATTR, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_listxattr), SMB_VFS_OP_LISTXATTR, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_removexattr), SMB_VFS_OP_REMOVEXATTR, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_lremovexattr),SMB_VFS_OP_LREMOVEXATTR,SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_setxattr), SMB_VFS_OP_SETXATTR, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_lsetxattr), SMB_VFS_OP_LSETXATTR, SMB_VFS_LAYER_TRANSPARENT}, + + /* File operations */ + {SMB_VFS_OP(shadow_copy2_open), SMB_VFS_OP_OPEN, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_rename), SMB_VFS_OP_RENAME, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_stat), SMB_VFS_OP_STAT, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_lstat), SMB_VFS_OP_LSTAT, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_fstat), SMB_VFS_OP_FSTAT, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_unlink), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_chmod), SMB_VFS_OP_CHMOD, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_chown), SMB_VFS_OP_CHOWN, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_chdir), SMB_VFS_OP_CHDIR, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_ntimes), SMB_VFS_OP_NTIMES, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_symlink), SMB_VFS_OP_SYMLINK, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_readlink), SMB_VFS_OP_READLINK, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_link), SMB_VFS_OP_LINK, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_mknod), SMB_VFS_OP_MKNOD, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_realpath), SMB_VFS_OP_REALPATH, SMB_VFS_LAYER_TRANSPARENT}, + + /* NT File ACL operations */ + {SMB_VFS_OP(shadow_copy2_get_nt_acl), SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT}, + {SMB_VFS_OP(shadow_copy2_set_nt_acl), SMB_VFS_OP_SET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT}, + + /* POSIX ACL operations */ + {SMB_VFS_OP(shadow_copy2_chmod_acl), SMB_VFS_OP_CHMOD_ACL, SMB_VFS_LAYER_TRANSPARENT}, + + /* special shadown copy op */ + {SMB_VFS_OP(shadow_copy2_get_shadow_copy2_data), + SMB_VFS_OP_GET_SHADOW_COPY_DATA,SMB_VFS_LAYER_OPAQUE}, + + {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP} +}; + +NTSTATUS vfs_shadow_copy2_init(void); +NTSTATUS vfs_shadow_copy2_init(void) +{ + NTSTATUS ret; + + ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "shadow_copy2", shadow_copy2_ops); + + if (!NT_STATUS_IS_OK(ret)) + return ret; + + 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)); + } + + return ret; +} |