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fs-util: Add XO_NOCOW flag

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Let's add a flag for xopenat() that immediately makes a file NOCOW
after opening it if it's supported.
This commit is contained in:
Daan De Meyer 2024-07-23 21:37:11 +02:00
parent 32dfe3b63e
commit 1b05ac946a
2 changed files with 8 additions and 0 deletions
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7
src/basic/fs-util.c
View File

@ -10,6 +10,7 @@
#include "alloc-util.h"
#include "btrfs.h"
#include "chattr-util.h"
#include "dirent-util.h"
#include "fd-util.h"
#include "fileio.h"
@ -1217,6 +1218,12 @@ int xopenat_full(int dir_fd, const char *path, int open_flags, XOpenFlags xopen_
goto error;
}
if (FLAGS_SET(xopen_flags, XO_NOCOW)) {
r = chattr_fd(fd, FS_NOCOW_FL, FS_NOCOW_FL, NULL);
if (r < 0 && !ERRNO_IS_NOT_SUPPORTED(r))
goto error;
}
return TAKE_FD(fd);
error:

1
src/basic/fs-util.h
View File

@ -131,6 +131,7 @@ int parse_cifs_service(const char *s, char **ret_host, char **ret_service, char
typedef enum XOpenFlags {
XO_LABEL = 1 << 0,
XO_SUBVOLUME = 1 << 1,
XO_NOCOW = 1 << 2,
} XOpenFlags;
int open_mkdir_at_full(int dirfd, const char *path, int flags, XOpenFlags xopen_flags, mode_t mode);