/
cephfs-fd.cc
1912 lines (1674 loc) · 50.4 KB
/
cephfs-fd.cc
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/*
BAREOS® - Backup Archiving REcovery Open Sourced
Copyright (C) 2014-2015 Planets Communications B.V.
Copyright (C) 2014-2020 Bareos GmbH & Co. KG
This program is Free Software; you can redistribute it and/or
modify it under the terms of version three of the GNU Affero General Public
License as published by the Free Software Foundation, which is
listed in the file LICENSE.
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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
/**
* @file
* CEPHFS plugin for the Bareos File Daemon
*/
#include "include/bareos.h"
#include "filed/fd_plugins.h"
#include "fd_common.h"
#include "include/fileopts.h"
#include "lib/alist.h"
#include "lib/berrno.h"
#include "lib/path_list.h"
#include <dirent.h>
#include <cephfs/libcephfs.h>
namespace filedaemon {
static const int debuglevel = 150;
#define PLUGIN_LICENSE "Bareos AGPLv3"
#define PLUGIN_AUTHOR "Marco van Wieringen"
#define PLUGIN_DATE "February 2015"
#define PLUGIN_VERSION "1"
#define PLUGIN_DESCRIPTION "Bareos CEPHFS File Daemon Plugin"
#define PLUGIN_USAGE "cephfs:conffile=<ceph_conf_file>:basedir=<basedir>:"
#define CEPHFS_PATH_MAX 4096
/**
* Forward referenced functions
*/
static bRC newPlugin(bpContext* ctx);
static bRC freePlugin(bpContext* ctx);
static bRC getPluginValue(bpContext* ctx, pVariable var, void* value);
static bRC setPluginValue(bpContext* ctx, pVariable var, void* value);
static bRC handlePluginEvent(bpContext* ctx, bEvent* event, void* value);
static bRC startBackupFile(bpContext* ctx, struct save_pkt* sp);
static bRC endBackupFile(bpContext* ctx);
static bRC pluginIO(bpContext* ctx, struct io_pkt* io);
static bRC startRestoreFile(bpContext* ctx, const char* cmd);
static bRC endRestoreFile(bpContext* ctx);
static bRC createFile(bpContext* ctx, struct restore_pkt* rp);
static bRC setFileAttributes(bpContext* ctx, struct restore_pkt* rp);
static bRC checkFile(bpContext* ctx, char* fname);
static bRC getAcl(bpContext* ctx, acl_pkt* ap);
static bRC setAcl(bpContext* ctx, acl_pkt* ap);
static bRC getXattr(bpContext* ctx, xattr_pkt* xp);
static bRC setXattr(bpContext* ctx, xattr_pkt* xp);
static bRC parse_plugin_definition(bpContext* ctx, void* value);
static bRC setup_backup(bpContext* ctx, void* value);
static bRC setup_restore(bpContext* ctx, void* value);
static bRC end_restore_job(bpContext* ctx, void* value);
/**
* Pointers to Bareos functions
*/
static bFuncs* bfuncs = NULL;
static bInfo* binfo = NULL;
/**
* Plugin Information block
*/
static genpInfo pluginInfo = {sizeof(pluginInfo), FD_PLUGIN_INTERFACE_VERSION,
FD_PLUGIN_MAGIC, PLUGIN_LICENSE,
PLUGIN_AUTHOR, PLUGIN_DATE,
PLUGIN_VERSION, PLUGIN_DESCRIPTION,
PLUGIN_USAGE};
/**
* Plugin entry points for Bareos
*/
static pFuncs pluginFuncs = {
sizeof(pluginFuncs), FD_PLUGIN_INTERFACE_VERSION,
/* Entry points into plugin */
newPlugin, /* new plugin instance */
freePlugin, /* free plugin instance */
getPluginValue, setPluginValue, handlePluginEvent, startBackupFile,
endBackupFile, startRestoreFile, endRestoreFile, pluginIO, createFile,
setFileAttributes, checkFile, getAcl, setAcl, getXattr, setXattr};
/**
* Plugin private context
*/
struct plugin_ctx {
int32_t backup_level; /* Backup level e.g. Full/Differential/Incremental */
utime_t since; /* Since time for Differential/Incremental */
char* plugin_options; /* Options passed to plugin */
char* plugin_definition; /* Previous plugin definition passed to plugin */
char* conffile; /* Configfile to read to be able to connect to CEPHFS */
char* basedir; /* Basedir to start backup in */
char flags[FOPTS_BYTES]; /* Bareos internal flags */
int32_t type; /* FT_xx for this file */
#if HAVE_CEPH_STATX
struct ceph_statx statx; /* Stat struct for next file to save */
#else
struct stat statp; /* Stat struct for next file to save */
#endif
bool processing_xattr; /* Set when we are processing a xattr list */
char* next_xattr_name; /* Next xattr name to process */
POOLMEM* cwd; /* Current Working Directory */
POOLMEM* next_filename; /* Next filename to save */
POOLMEM* link_target; /* Target symlink points to */
POOLMEM* xattr_list; /* List of xattrs */
alist* dir_stack; /* Stack of directories when recursing */
htable* path_list; /* Hash table with directories created on restore. */
struct dirent de; /* Current directory entry being processed. */
struct ceph_mount_info* cmount; /* CEPHFS mountpoint */
struct ceph_dir_result* cdir; /* CEPHFS directory handle */
int cfd; /* CEPHFS file handle */
};
/**
* This defines the arguments that the plugin parser understands.
*/
enum plugin_argument_type
{
argument_none,
argument_conffile,
argument_basedir
};
struct plugin_argument {
const char* name;
enum plugin_argument_type type;
};
static plugin_argument plugin_arguments[] = {
/* configfile: deprecated, use conffile instead (same as the other plugins
and backends) */
{"configfile", argument_conffile},
{"conffile", argument_conffile},
{"basedir", argument_basedir},
{NULL, argument_none}};
/**
* If we recurse into a subdir we push the current directory onto
* a stack so we can pop it after we have processed the subdir.
*/
struct dir_stack_entry {
#if HAVE_CEPH_STATX
struct ceph_statx statx; /* Stat struct of directory */
#else
struct stat statp; /* Stat struct of directory */
#endif
struct ceph_dir_result* cdir; /* CEPHFS directory handle */
};
#ifdef __cplusplus
extern "C" {
#endif
/**
* loadPlugin() and unloadPlugin() are entry points that are exported, so Bareos
* can directly call these two entry points they are common to all Bareos
* plugins.
*
* External entry point called by Bareos to "load" the plugin
*/
bRC loadPlugin(bInfo* lbinfo,
bFuncs* lbfuncs,
genpInfo** pinfo,
pFuncs** pfuncs)
{
bfuncs = lbfuncs; /* set Bareos funct pointers */
binfo = lbinfo;
*pinfo = &pluginInfo; /* return pointer to our info */
*pfuncs = &pluginFuncs; /* return pointer to our functions */
return bRC_OK;
}
/**
* External entry point to unload the plugin
*/
bRC unloadPlugin() { return bRC_OK; }
#ifdef __cplusplus
}
#endif
/**
* The following entry points are accessed through the function pointers we
* supplied to Bareos. Each plugin type (dir, fd, sd) has its own set of entry
* points that the plugin must define.
*
* Create a new instance of the plugin i.e. allocate our private storage
*/
static bRC newPlugin(bpContext* ctx)
{
plugin_ctx* p_ctx;
p_ctx = (plugin_ctx*)malloc(sizeof(plugin_ctx));
if (!p_ctx) { return bRC_Error; }
memset(p_ctx, 0, sizeof(plugin_ctx));
ctx->pContext = (void*)p_ctx; /* set our context pointer */
/*
* Allocate some internal memory for:
* - The current working dir.
* - The file we are processing
* - The link target of a symbolic link.
* - The list of xattrs.
*/
p_ctx->cwd = GetPoolMemory(PM_FNAME);
p_ctx->next_filename = GetPoolMemory(PM_FNAME);
p_ctx->link_target = GetPoolMemory(PM_FNAME);
p_ctx->xattr_list = GetPoolMemory(PM_MESSAGE);
/*
* Resize all buffers for PATH like names to CEPHFS_PATH_MAX.
*/
p_ctx->cwd = CheckPoolMemorySize(p_ctx->cwd, CEPHFS_PATH_MAX);
p_ctx->next_filename =
CheckPoolMemorySize(p_ctx->next_filename, CEPHFS_PATH_MAX);
p_ctx->link_target = CheckPoolMemorySize(p_ctx->link_target, CEPHFS_PATH_MAX);
/*
* This is a alist that holds the stack of directories we have open.
* We push the current directory onto this stack the moment we start
* processing a sub directory and pop it from this list when we are
* done processing that sub directory.
*/
p_ctx->dir_stack = new alist(10, owned_by_alist);
/*
* Only register the events we are really interested in.
*/
bfuncs->registerBareosEvents(ctx, 7, bEventLevel, bEventSince,
bEventRestoreCommand, bEventBackupCommand,
bEventPluginCommand, bEventEndRestoreJob,
bEventNewPluginOptions);
return bRC_OK;
}
/**
* Free a plugin instance, i.e. release our private storage
*/
static bRC freePlugin(bpContext* ctx)
{
plugin_ctx* p_ctx = (plugin_ctx*)ctx->pContext;
if (!p_ctx) { return bRC_Error; }
Dmsg(ctx, debuglevel, "cephfs-fd: entering freePlugin\n");
if (p_ctx->path_list) {
FreePathList(p_ctx->path_list);
p_ctx->path_list = NULL;
}
if (p_ctx->dir_stack) {
p_ctx->dir_stack->destroy();
delete p_ctx->dir_stack;
}
if (p_ctx->cmount) {
ceph_shutdown(p_ctx->cmount);
p_ctx->cmount = NULL;
}
FreePoolMemory(p_ctx->xattr_list);
FreePoolMemory(p_ctx->link_target);
FreePoolMemory(p_ctx->next_filename);
FreePoolMemory(p_ctx->cwd);
if (p_ctx->basedir) { free(p_ctx->basedir); }
if (p_ctx->conffile) { free(p_ctx->conffile); }
if (p_ctx->plugin_definition) { free(p_ctx->plugin_definition); }
if (p_ctx->plugin_options) { free(p_ctx->plugin_options); }
free(p_ctx);
p_ctx = NULL;
Dmsg(ctx, debuglevel, "cephfs-fd: leaving freePlugin\n");
return bRC_OK;
}
/**
* Return some plugin value (none defined)
*/
static bRC getPluginValue(bpContext* ctx, pVariable var, void* value)
{
return bRC_OK;
}
/**
* Set a plugin value (none defined)
*/
static bRC setPluginValue(bpContext* ctx, pVariable var, void* value)
{
return bRC_OK;
}
/**
* Handle an event that was generated in Bareos
*/
static bRC handlePluginEvent(bpContext* ctx, bEvent* event, void* value)
{
bRC retval;
plugin_ctx* p_ctx = (plugin_ctx*)ctx->pContext;
if (!p_ctx) { return bRC_Error; }
switch (event->eventType) {
case bEventLevel:
p_ctx->backup_level = (int64_t)value;
retval = bRC_OK;
break;
case bEventSince:
p_ctx->since = (int64_t)value;
retval = bRC_OK;
break;
case bEventRestoreCommand:
retval = parse_plugin_definition(ctx, value);
if (retval == bRC_OK) { retval = setup_restore(ctx, value); }
break;
case bEventBackupCommand:
retval = parse_plugin_definition(ctx, value);
if (retval == bRC_OK) { retval = setup_backup(ctx, value); }
break;
case bEventPluginCommand:
retval = parse_plugin_definition(ctx, value);
break;
case bEventNewPluginOptions:
/*
* Free any previous value.
*/
if (p_ctx->plugin_options) {
free(p_ctx->plugin_options);
p_ctx->plugin_options = NULL;
}
retval = parse_plugin_definition(ctx, value);
/*
* Save that we got a plugin override.
*/
p_ctx->plugin_options = strdup((char*)value);
break;
case bEventEndRestoreJob:
retval = end_restore_job(ctx, value);
break;
default:
Jmsg(ctx, M_FATAL, "cephfs-fd: unknown event=%d\n", event->eventType);
Dmsg(ctx, debuglevel, "cephfs-fd: unknown event=%d\n", event->eventType);
retval = bRC_Error;
break;
}
return retval;
}
/**
* Get the next file to backup.
*/
static bRC get_next_file_to_backup(bpContext* ctx)
{
int status;
struct save_pkt sp;
struct dirent* entry;
plugin_ctx* p_ctx = (plugin_ctx*)ctx->pContext;
/*
* See if we just saved the directory then we are done processing this
* directory.
*/
switch (p_ctx->type) {
case FT_DIREND:
/*
* See if there is anything on the dir stack to pop off and continue
* reading that directory.
*/
if (!p_ctx->dir_stack->empty()) {
const char* cwd;
struct dir_stack_entry* entry;
/*
* Change the GLFS cwd back one dir.
*/
status = ceph_chdir(p_ctx->cmount, "..");
if (status < 0) {
BErrNo be;
Jmsg(ctx, M_ERROR, "cephfs-fd: ceph_chdir(%s) failed: %s\n", "..",
be.bstrerror(-status));
return bRC_Error;
}
/*
* Save where we are in the tree.
*/
cwd = ceph_getcwd(p_ctx->cmount);
PmStrcpy(p_ctx->cwd, cwd);
/*
* Pop the previous directory handle and continue processing that.
*/
entry = (struct dir_stack_entry*)p_ctx->dir_stack->pop();
#if HAVE_CEPH_STATX
memcpy(&p_ctx->statx, &entry->statx, sizeof(p_ctx->statx));
#else
memcpy(&p_ctx->statp, &entry->statp, sizeof(p_ctx->statp));
#endif
p_ctx->cdir = entry->cdir;
free(entry);
} else {
return bRC_OK;
}
break;
default:
break;
}
if (!p_ctx->cdir) { return bRC_Error; }
/*
* Loop until we know what file is next or when we are done.
*/
while (1) {
#if HAVE_CEPH_STATX
unsigned int stmask = 0;
memset(&p_ctx->statx, 0, sizeof(p_ctx->statx));
status =
ceph_readdirplus_r(p_ctx->cmount, p_ctx->cdir, &p_ctx->de,
&p_ctx->statx, stmask, CEPH_STATX_ALL_STATS, NULL);
#else
int stmask = 0;
memset(&p_ctx->statp, 0, sizeof(p_ctx->statp));
status = ceph_readdirplus_r(p_ctx->cmount, p_ctx->cdir, &p_ctx->de,
&p_ctx->statp, &stmask);
#endif
memset(&p_ctx->de, 0, sizeof(p_ctx->de));
/*
* No more entries in this directory ?
*/
if (status == 0) {
#if HAVE_CEPH_STATX
status = ceph_statx(p_ctx->cmount, p_ctx->cwd, &p_ctx->statx,
CEPH_STATX_MODE, 0);
#else
status = ceph_stat(p_ctx->cmount, p_ctx->cwd, &p_ctx->statp);
#endif
if (status < 0) {
BErrNo be;
Jmsg(ctx, M_ERROR, "cephfs-fd: ceph_stat(%s) failed: %s\n", p_ctx->cwd,
be.bstrerror(-status));
return bRC_Error;
}
status = ceph_closedir(p_ctx->cmount, p_ctx->cdir);
if (status < 0) {
BErrNo be;
Jmsg(ctx, M_ERROR, "cephfs-fd: ceph_closedir(%s) failed: %s\n",
p_ctx->cwd, be.bstrerror(-status));
return bRC_Error;
}
p_ctx->cdir = NULL;
p_ctx->type = FT_DIREND;
PmStrcpy(p_ctx->next_filename, p_ctx->cwd);
Dmsg(ctx, debuglevel, "cephfs-fd: next file to backup %s\n",
p_ctx->next_filename);
return bRC_More;
}
entry = &p_ctx->de;
/*
* Skip `.', `..', and excluded file names.
*/
if (entry->d_name[0] == '\0' ||
(entry->d_name[0] == '.' &&
(entry->d_name[1] == '\0' ||
(entry->d_name[1] == '.' && entry->d_name[2] == '\0')))) {
continue;
}
Mmsg(p_ctx->next_filename, "%s/%s", p_ctx->cwd, entry->d_name);
/*
* Determine the FileType.
*/
#if HAVE_CEPH_STATX
switch (p_ctx->statx.stx_mode & S_IFMT) {
#else
switch (p_ctx->statp.st_mode & S_IFMT) {
#endif
case S_IFREG:
p_ctx->type = FT_REG;
break;
case S_IFLNK:
p_ctx->type = FT_LNK;
status = ceph_readlink(p_ctx->cmount, p_ctx->next_filename,
p_ctx->link_target,
SizeofPoolMemory(p_ctx->link_target));
if (status < 0) {
BErrNo be;
Jmsg(ctx, M_ERROR, "cephfs-fd: ceph_readlink(%s) failed: %s\n",
p_ctx->next_filename, be.bstrerror(-status));
p_ctx->type = FT_NOFOLLOW;
}
p_ctx->link_target[status] = '\0';
break;
case S_IFDIR:
p_ctx->type = FT_DIRBEGIN;
break;
case S_IFCHR:
case S_IFBLK:
case S_IFIFO:
#ifdef S_IFSOCK
case S_IFSOCK:
#endif
p_ctx->type = FT_SPEC;
break;
default:
#if HAVE_CEPH_STATX
Jmsg(ctx, M_FATAL,
"cephfs-fd: Unknown filetype encountered %ld for %s\n",
p_ctx->statx.stx_mode & S_IFMT, p_ctx->next_filename);
#else
Jmsg(ctx, M_FATAL,
"cephfs-fd: Unknown filetype encountered %ld for %s\n",
p_ctx->statp.st_mode & S_IFMT, p_ctx->next_filename);
#endif
return bRC_Error;
}
/*
* See if we accept this file under the currently loaded fileset.
*/
memset(&sp, 0, sizeof(sp));
sp.pkt_size = sizeof(sp);
sp.pkt_end = sizeof(sp);
sp.fname = p_ctx->next_filename;
sp.type = p_ctx->type;
#if HAVE_CEPH_STATX
memcpy(&sp.statp, &p_ctx->statx, sizeof(sp.statp));
#else
memcpy(&sp.statp, &p_ctx->statp, sizeof(sp.statp));
#endif
if (bfuncs->AcceptFile(ctx, &sp) == bRC_Skip) {
Dmsg(ctx, debuglevel,
"cephfs-fd: file %s skipped due to current fileset settings\n",
p_ctx->next_filename);
continue;
}
/*
* If we made it here we have the next file to backup.
*/
break;
}
Dmsg(ctx, debuglevel, "cephfs-fd: next file to backup %s\n",
p_ctx->next_filename);
return bRC_More;
}
/**
* Start the backup of a specific file
*/
static bRC startBackupFile(bpContext* ctx, struct save_pkt* sp)
{
int status;
plugin_ctx* p_ctx = (plugin_ctx*)ctx->pContext;
/*
* Save the current flags used to save the next file.
*/
CopyBits(FO_MAX, sp->flags, p_ctx->flags);
/*
* See if we start processing a new directory if so open it so the can recurse
* into it if wanted.
*/
switch (p_ctx->type) {
case FT_DIRBEGIN:
/*
* See if we are recursing if so we open the directory and process it.
* We also open the directory when it the toplevel e.g. when p_ctx->cdir
* == NULL.
*/
if (!p_ctx->cdir || !BitIsSet(FO_NO_RECURSION, p_ctx->flags)) {
/*
* Change into the directory and process all entries in it.
*/
status = ceph_chdir(p_ctx->cmount, p_ctx->next_filename);
if (status < 0) {
BErrNo be;
Jmsg(ctx, M_ERROR, "cephfs-fd: ceph_chdir(%s) failed: %s\n",
p_ctx->next_filename, be.bstrerror(-status));
p_ctx->type = FT_NOOPEN;
} else {
/*
* Push the current directory onto the directory stack so we can
* continue processing it later on.
*/
if (p_ctx->cdir) {
struct dir_stack_entry* new_entry;
new_entry =
(struct dir_stack_entry*)malloc(sizeof(struct dir_stack_entry));
#if HAVE_CEPH_STATX
memcpy(&new_entry->statx, &p_ctx->statx, sizeof(new_entry->statx));
#else
memcpy(&new_entry->statp, &p_ctx->statp, sizeof(new_entry->statp));
#endif
new_entry->cdir = p_ctx->cdir;
p_ctx->dir_stack->push(new_entry);
}
/*
* Open this directory for processing.
*/
status = ceph_opendir(p_ctx->cmount, ".", &p_ctx->cdir);
if (status < 0) {
BErrNo be;
Jmsg(ctx, M_ERROR, "cephfs-fd: ceph_opendir(%s) failed: %s\n",
p_ctx->next_filename, be.bstrerror(-status));
p_ctx->type = FT_NOOPEN;
/*
* Pop the previous directory handle and continue processing that.
*/
if (!p_ctx->dir_stack->empty()) {
struct dir_stack_entry* entry;
entry = (struct dir_stack_entry*)p_ctx->dir_stack->pop();
#if HAVE_CEPH_STATX
memcpy(&p_ctx->statx, &entry->statx, sizeof(p_ctx->statx));
#else
memcpy(&p_ctx->statp, &entry->statp, sizeof(p_ctx->statp));
#endif
p_ctx->cdir = entry->cdir;
free(entry);
status = ceph_chdir(p_ctx->cmount, "..");
if (status < 0) {
BErrNo be;
Jmsg(ctx, M_ERROR, "cephfs-fd: ceph_chdir(..) failed: %s\n",
p_ctx->next_filename, be.bstrerror(-status));
return bRC_Error;
}
}
} else {
const char* cwd;
cwd = ceph_getcwd(p_ctx->cmount);
PmStrcpy(p_ctx->cwd, cwd);
}
}
}
/*
* No link target and read the actual content.
*/
sp->link = NULL;
sp->no_read = true;
break;
case FT_DIREND:
/*
* For a directory, link is the same as fname, but with trailing slash
* and don't read the actual content.
*/
Mmsg(p_ctx->link_target, "%s/", p_ctx->next_filename);
sp->link = p_ctx->link_target;
sp->no_read = true;
break;
case FT_LNK:
/*
* Link target and don't read the actual content.
*/
sp->link = p_ctx->link_target;
sp->no_read = true;
break;
case FT_REGE:
case FT_REG:
case FT_SPEC:
case FT_RAW:
case FT_FIFO:
/*
* No link target and read the actual content.
*/
sp->link = NULL;
sp->no_read = false;
break;
default:
/*
* No link target and don't read the actual content.
*/
sp->link = NULL;
sp->no_read = true;
break;
}
sp->fname = p_ctx->next_filename;
sp->type = p_ctx->type;
#if HAVE_CEPH_STATX
memcpy(&sp->statp, &p_ctx->statx, sizeof(sp->statp));
#else
memcpy(&sp->statp, &p_ctx->statp, sizeof(sp->statp));
#endif
sp->save_time = p_ctx->since;
/*
* For Incremental and Differential backups use checkChanges method to
* see if we need to backup this file.
*/
switch (p_ctx->backup_level) {
case L_INCREMENTAL:
case L_DIFFERENTIAL:
switch (bfuncs->checkChanges(ctx, sp)) {
case bRC_Seen:
Dmsg(ctx, debuglevel,
"cephfs-fd: skipping %s checkChanges returns bRC_Seen\n",
p_ctx->next_filename);
switch (sp->type) {
case FT_DIRBEGIN:
case FT_DIREND:
sp->type = FT_DIRNOCHG;
break;
default:
sp->type = FT_NOCHG;
break;
}
break;
default:
break;
}
}
return bRC_OK;
}
/**
* Done with backup of this file
*/
static bRC endBackupFile(bpContext* ctx)
{
plugin_ctx* p_ctx = (plugin_ctx*)ctx->pContext;
if (!p_ctx) { return bRC_Error; }
/*
* See if we need to fix the utimes.
*/
if (BitIsSet(FO_NOATIME, p_ctx->flags)) {
struct utimbuf times;
#if HAVE_CEPH_STATX
times.actime = p_ctx->statx.stx_atime.tv_sec;
times.modtime = p_ctx->statx.stx_mtime.tv_sec;
#else
times.actime = p_ctx->statp.st_atime;
times.modtime = p_ctx->statp.st_mtime;
#endif
ceph_utime(p_ctx->cmount, p_ctx->next_filename, ×);
}
return get_next_file_to_backup(ctx);
}
/**
* Strip any backslashes in the string.
*/
static inline void StripBackSlashes(char* value)
{
char* bp;
bp = value;
while (*bp) {
switch (*bp) {
case '\\':
bstrinlinecpy(bp, bp + 1);
break;
default:
break;
}
bp++;
}
}
/**
* Only set destination to value when it has no previous setting.
*/
static inline void SetStringIfNull(char** destination, char* value)
{
if (!*destination) {
*destination = strdup(value);
StripBackSlashes(*destination);
}
}
/**
* Always set destination to value and clean any previous one.
*/
static inline void SetString(char** destination, char* value)
{
if (*destination) { free(*destination); }
*destination = strdup(value);
StripBackSlashes(*destination);
}
/**
* Parse the plugin definition passed in.
*
* The definition is in this form:
*
* cephfs:conffile=<path_to_config>:basedir=<basedir>:
*/
static bRC parse_plugin_definition(bpContext* ctx, void* value)
{
int i;
bool keep_existing;
char *plugin_definition, *bp, *argument, *argument_value;
plugin_ctx* p_ctx = (plugin_ctx*)ctx->pContext;
if (!p_ctx || !value) { return bRC_Error; }
/*
* See if we already got some plugin definition before and its exactly the
* same.
*/
if (p_ctx->plugin_definition) {
if (bstrcmp(p_ctx->plugin_definition, (char*)value)) { return bRC_OK; }
free(p_ctx->plugin_definition);
}
/*
* Keep track of the last processed plugin definition.
*/
p_ctx->plugin_definition = strdup((char*)value);
keep_existing = (p_ctx->plugin_options) ? true : false;
/*
* Parse the plugin definition.
* Make a private copy of the whole string.
*/
plugin_definition = strdup((char*)value);
bp = strchr(plugin_definition, ':');
if (!bp) {
Jmsg(ctx, M_FATAL, "cephfs-fd: Illegal plugin definition %s\n",
plugin_definition);
Dmsg(ctx, debuglevel, "cephfs-fd: Illegal plugin definition %s\n",
plugin_definition);
goto bail_out;
}
/*
* Skip the first ':'
*/
bp++;
while (bp) {
if (strlen(bp) == 0) { break; }
/*
* Each argument is in the form:
* <argument> = <argument_value>
*
* So we setup the right pointers here, argument to the beginning
* of the argument, argument_value to the beginning of the argument_value.
*/
argument = bp;
argument_value = strchr(bp, '=');
if (!argument_value) {
Jmsg(ctx, M_FATAL, "cephfs-fd: Illegal argument %s without value\n",
argument);
Dmsg(ctx, debuglevel, "cephfs-fd: Illegal argument %s without value\n",
argument);
goto bail_out;
}
*argument_value++ = '\0';
/*
* See if there are more arguments and setup for the next run.
*/
bp = argument_value;
do {
bp = strchr(bp, ':');
if (bp) {
if (*(bp - 1) != '\\') {
*bp++ = '\0';
break;
} else {
bp++;
}
}
} while (bp);
for (i = 0; plugin_arguments[i].name; i++) {
if (Bstrcasecmp(argument, plugin_arguments[i].name)) {
char** str_destination = NULL;
switch (plugin_arguments[i].type) {
case argument_conffile:
str_destination = &p_ctx->conffile;
break;
case argument_basedir:
str_destination = &p_ctx->basedir;
break;
default:
break;
}
/*
* Keep the first value, ignore any next setting.
*/
if (str_destination) {
if (keep_existing) {
SetStringIfNull(str_destination, argument_value);
} else {
SetString(str_destination, argument_value);
}
}
/*
* When we have a match break the loop.
*/
break;
}
}
/*
* Got an invalid keyword ?
*/
if (!plugin_arguments[i].name) {
Jmsg(
ctx, M_FATAL,
"cephfs-fd: Illegal argument %s with value %s in plugin definition\n",
argument, argument_value);
Dmsg(
ctx, debuglevel,
"cephfs-fd: Illegal argument %s with value %s in plugin definition\n",
argument, argument_value);
goto bail_out;
}
}
free(plugin_definition);
return bRC_OK;
bail_out:
free(plugin_definition);
return bRC_Error;
}
/**
* Open a CEPHFS mountpoint.
*/
static bRC connect_to_cephfs(bpContext* ctx)
{
int status;
plugin_ctx* p_ctx = (plugin_ctx*)ctx->pContext;
/*