db/pg_probackup
db/pg_probackup
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Remove the limit on the number of extra directories.

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Save extra directories separately to eliminate name collisions.
This commit is contained in:
Sergey Cherkashin 2018-11-27 16:28:30 +03:00
parent 07c7c14df6
commit 863486be7e
4 changed files with 55 additions and 35 deletions
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45
src/backup.c
View File

@ -463,8 +463,7 @@ do_backup_instance(void)
{
int i;
char database_path[MAXPGPATH];
char extra_path[MAXPGPATH];
char *extradirs[] = { NULL, NULL, NULL, NULL };
char extra_path[MAXPGPATH]; /* Temp value. Used as template */
char dst_backup_path[MAXPGPATH];
char label[1024];
XLogRecPtr prev_backup_start_lsn = InvalidXLogRecPtr;
@ -478,23 +477,22 @@ do_backup_instance(void)
pgBackup *prev_backup = NULL;
parray *prev_backup_filelist = NULL;
parray *backup_list = NULL;
parray *extra_dirs = NULL;
pgFile *pg_control = NULL;
elog(LOG, "Database backup start");
i = 0;
extra_dirs = parray_new();
/* TODO: Add path validation */
if(extradir)
{
p = strtok(extradir,":");
while(p!=NULL)
{
extradirs[i] = (char *)palloc(strlen(p) + 1);
strcpy(extradirs[i],p);
elog(WARNING,"%s",extradirs[i]);
i++;
char * dir = (char *)palloc(strlen(p) + 1);
strcpy(dir,p);
parray_append(extra_dirs, dir);
p=strtok(NULL,":");
if (i==3)
break;
}
}
@ -654,11 +652,10 @@ do_backup_instance(void)
parse_backup_filelist_filenames(backup_files_list, pgdata);
/* Append to backup list all files dirictories from extra dirictory option */
for (i = 0; extradirs[i]; i++)
{
elog(WARNING,"%s",extradirs[i]);
dir_list_file(backup_files_list, extradirs[i], true, true, true, true);
}
for (i = 0; i < parray_num(extra_dirs); i++)
/* Extra dirs numeration starts with 1. 0 value is not extra dir */
dir_list_file(backup_files_list, (char *) parray_get(extra_dirs, i),
true, true, true, i+1);
if (current.backup_mode != BACKUP_MODE_FULL)
{
@ -714,8 +711,12 @@ do_backup_instance(void)
elog(VERBOSE, "Create directory \"%s\" NAME %s", dir_name, file->name);
if (file->is_extra)
join_path_components(dirpath, extra_path, dir_name);
if (file->extra_dir_num)
{
char temp[MAXPGPATH];
sprintf(temp, "%s%d", extra_path, file->extra_dir_num);
join_path_components(dirpath, temp, dir_name);
}
else
join_path_components(dirpath, database_path, dir_name);
dir_create_dir(dirpath, DIR_PERMISSION);
@ -783,6 +784,12 @@ do_backup_instance(void)
parray_walk(prev_backup_filelist, pgFileFree);
parray_free(prev_backup_filelist);
}
/* clean extra directories list */
if (extra_dirs)
{
parray_walk(extra_dirs, pfree);
parray_free(extra_dirs);
}
/* In case of backup from replica >= 9.6 we must fix minRecPoint,
* First we must find pg_control in backup_files_list.
@ -2237,10 +2244,12 @@ backup_files(void *arg)
continue;
}
}
else if (file->is_extra)
else if (file->extra_dir_num)
{
char temp[MAXPGPATH];
sprintf(temp, "%s%d", arguments->extra, file->extra_dir_num);
if (!copy_file(file->extradir,
arguments->extra,
temp,
file))
{
file->write_size = BYTES_INVALID;

2
src/catalog.c
View File

@ -406,7 +406,7 @@ pgBackupCreateDir(pgBackup *backup)
{
int i;
char path[MAXPGPATH];
char *subdirs[] = { DATABASE_DIR, EXTRA_DIR, NULL };
char *subdirs[] = { DATABASE_DIR, NULL };
pgBackupGetPath(backup, path, lengthof(path), NULL);

38
src/dir.c
View File

@ -120,7 +120,8 @@ static int BlackListCompare(const void *str1, const void *str2);
static bool dir_check_file(const char *root, pgFile *file);
static void dir_list_file_internal(parray *files, const char *root,
pgFile *parent, bool exclude,
bool omit_symlink, parray *black_list, bool is_extra);
bool omit_symlink, parray *black_list,
int extra_dir_num);
static void list_data_directories(parray *files, const char *path, bool is_root,
bool exclude);
@ -156,7 +157,7 @@ dir_create_dir(const char *dir, mode_t mode)
}
pgFile *
pgFileNew(const char *path, bool omit_symlink, bool is_extra)
pgFileNew(const char *path, bool omit_symlink, int extra_dir_num)
{
struct stat st;
pgFile *file;
@ -174,7 +175,8 @@ pgFileNew(const char *path, bool omit_symlink, bool is_extra)
file = pgFileInit(path);
file->size = st.st_size;
file->mode = st.st_mode;
file->is_extra = is_extra;
file->is_extra = extra_dir_num > 0;
file->extra_dir_num = extra_dir_num;
file->extradir = NULL;
return file;
@ -374,7 +376,7 @@ BlackListCompare(const void *str1, const void *str2)
*/
void
dir_list_file(parray *files, const char *root, bool exclude, bool omit_symlink,
bool add_root, bool is_extra)
bool add_root, int extra_dir_num)
{
pgFile *file;
parray *black_list = NULL;
@ -411,7 +413,7 @@ dir_list_file(parray *files, const char *root, bool exclude, bool omit_symlink,
parray_qsort(black_list, BlackListCompare);
}
file = pgFileNew(root, false, is_extra);
file = pgFileNew(root, false, extra_dir_num);
if (file == NULL)
return;
@ -427,7 +429,8 @@ dir_list_file(parray *files, const char *root, bool exclude, bool omit_symlink,
parray_append(files, file);
}
dir_list_file_internal(files, root, file, exclude, omit_symlink, black_list, is_extra);
dir_list_file_internal(files, root, file, exclude, omit_symlink, black_list,
extra_dir_num);
}
/*
@ -615,7 +618,7 @@ dir_check_file(const char *root, pgFile *file)
*/
static void
dir_list_file_internal(parray *files, const char *root, pgFile *parent,
bool exclude, bool omit_symlink, parray *black_list, bool is_extra)
bool exclude, bool omit_symlink, parray *black_list, int extra_dir_num)
{
DIR *dir;
struct dirent *dent;
@ -644,7 +647,7 @@ dir_list_file_internal(parray *files, const char *root, pgFile *parent,
join_path_components(child, parent->path, dent->d_name);
file = pgFileNew(child, omit_symlink, is_extra);
file = pgFileNew(child, omit_symlink, extra_dir_num);
if (file == NULL)
continue;
@ -677,7 +680,7 @@ dir_list_file_internal(parray *files, const char *root, pgFile *parent,
}
/* If it is extra dir, remember it */
if (is_extra)
if (extra_dir_num)
{
file->extradir = pgut_strdup(root);
dirname(file->extradir);
@ -705,7 +708,7 @@ dir_list_file_internal(parray *files, const char *root, pgFile *parent,
*/
if (S_ISDIR(file->mode))
dir_list_file_internal(files, root, file, exclude, omit_symlink,
black_list, is_extra);
black_list, extra_dir_num);
}
if (errno && errno != ENOENT)
@ -1201,11 +1204,12 @@ print_file_list(FILE *out, const parray *files, const char *root)
fprintf(out, "{\"path\":\"%s\", \"size\":\"" INT64_FORMAT "\", "
"\"mode\":\"%u\", \"is_datafile\":\"%u\", "
"\"is_cfs\":\"%u\", \"crc\":\"%u\", "
"\"compress_alg\":\"%s\", \"is_extra\":\"%u\"",
"\"compress_alg\":\"%s\", \"is_extra\":\"%u\""
", \"extra_dir_num\":\"%u\"",
path, file->write_size, file->mode,
file->is_datafile ? 1 : 0, file->is_cfs ? 1 : 0, file->crc,
deparse_compress_alg(file->compress_alg),
file->is_extra ? 1 : 0);
file->is_extra ? 1 : 0, file->extra_dir_num);
if (file->extradir)
fprintf(out, ",\"extradir\":\"%s\"", file->extradir);
@ -1399,6 +1403,7 @@ dir_read_file_list(const char *root, const char *extra_path, const char *file_tx
is_datafile,
is_cfs,
is_extra,
extra_dir_num,
crc,
segno,
n_blocks;
@ -1412,10 +1417,15 @@ dir_read_file_list(const char *root, const char *extra_path, const char *file_tx
get_control_value(buf, "crc", NULL, &crc, true);
get_control_value(buf, "compress_alg", compress_alg_string, NULL, false);
get_control_value(buf, "is_extra", NULL, &is_extra, false);
get_control_value(buf, "extra_dir_num", NULL, &extra_dir_num, false);
if (root)
if (is_extra)
join_path_components(filepath, extra_path, path);
if (extra_dir_num)
{
char temp[MAXPGPATH];
sprintf(temp, "%s%ld", extra_path, extra_dir_num);
join_path_components(filepath, temp, path);
}
else
join_path_components(filepath, root, path);
else

5
src/pg_probackup.h
View File

@ -117,6 +117,7 @@ typedef struct pgFile
bool is_cfs; /* Flag to distinguish files compressed by CFS*/
bool is_database;
bool is_extra;
bool extra_dir_num; /* Number of extra directory. 0 if not extra */
char *extradir; /* File from extra directory */
bool exists_in_prev; /* Mark files, both data and regular, that exists in previous backup */
CompressAlg compress_alg; /* compression algorithm applied to the file */
@ -516,7 +517,7 @@ extern const char* deparse_compress_alg(int alg);
/* in dir.c */
extern void dir_list_file(parray *files, const char *root, bool exclude,
bool omit_symlink, bool add_root, bool is_extra);
bool omit_symlink, bool add_root, int extra_dir_num);
extern void create_data_directories(const char *data_dir,
const char *backup_dir,
bool extract_tablespaces);
@ -534,7 +535,7 @@ extern bool dir_is_empty(const char *path);
extern bool fileExists(const char *path);
extern size_t pgFileSize(const char *path);
extern pgFile *pgFileNew(const char *path, bool omit_symlink, bool is_extra);
extern pgFile *pgFileNew(const char *path, bool omit_symlink, int extra_dir_num);
extern pgFile *pgFileInit(const char *path);
extern void pgFileDelete(pgFile *file);
extern void pgFileFree(void *file);