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fs-util: Add XO_SUBVOLUME flag for xopenat()

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When specified, xopenat() will try to create a btrfs subvolume and
fall back to creating a regular directory.
This commit is contained in:
Daan De Meyer
2023-08-14 18:46:08 +02:00
parent e54c79ccc2
commit bc6a6130ac
2 changed files with 7 additions and 2 deletions
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src/basic/fs-util.c
+5 -1
View File
@@ -9,6 +9,7 @@
#include <unistd.h>
#include "alloc-util.h"
#include "btrfs.h"
#include "dirent-util.h"
#include "fd-util.h"
#include "fileio.h"
@@ -1110,7 +1111,10 @@ int xopenat(int dir_fd, const char *path, int open_flags, XOpenFlags xopen_flags
}
if (FLAGS_SET(open_flags, O_DIRECTORY|O_CREAT)) {
r = RET_NERRNO(mkdirat(dir_fd, path, mode));
if (FLAGS_SET(xopen_flags, XO_SUBVOLUME))
r = btrfs_subvol_make_fallback(dir_fd, path, mode);
else
r = RET_NERRNO(mkdirat(dir_fd, path, mode));
if (r == -EEXIST) {
if (FLAGS_SET(open_flags, O_EXCL))
return -EEXIST;
src/basic/fs-util.h
+2 -1
View File
@@ -133,7 +133,8 @@ int open_mkdir_at(int dirfd, const char *path, int flags, mode_t mode);
int openat_report_new(int dirfd, const char *pathname, int flags, mode_t mode, bool *ret_newly_created);
typedef enum XOpenFlags {
XO_LABEL = 1 << 0,
XO_LABEL = 1 << 0,
XO_SUBVOLUME = 1 << 1,
} XOpenFlags;
int xopenat(int dir_fd, const char *path, int open_flags, XOpenFlags xopen_flags, mode_t mode);