dilim/systemd
1
0
Fork 0
mirror of https://github.com/systemd/systemd.git synced 2026-08-02 22:20:20 +00:00
Code Issues Packages Projects Releases Wiki Activity

blockdev-util: add fd-based APIs for getting backing block device for file

Browse Source
This commit is contained in:
Lennart Poettering
2021-03-08 23:48:21 +01:00
parent 1053967781
commit bcf8fc267f
2 changed files with 18 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/shared/blockdev-util.c
View File

@@ -182,26 +182,39 @@ int block_get_originating(dev_t dt, dev_t *ret) {
return 1;
}
int get_block_device_harder(const char *path, dev_t *ret) {
int get_block_device_harder_fd(int fd, dev_t *ret) {
int r;
assert(path);
assert(fd >= 0);
assert(ret);
/* Gets the backing block device for a file system, and handles LUKS encrypted file systems, looking for its
* immediate parent, if there is one. */
r = get_block_device(path, ret);
r = get_block_device_fd(fd, ret);
if (r <= 0)
return r;
r = block_get_originating(*ret, ret);
if (r < 0)
log_debug_errno(r, "Failed to chase block device '%s', ignoring: %m", path);
log_debug_errno(r, "Failed to chase block device, ignoring: %m");
return 1;
}
int get_block_device_harder(const char *path, dev_t *ret) {
_cleanup_close_ int fd = -1;
assert(path);
assert(ret);
fd = open(path, O_RDONLY|O_NOFOLLOW|O_CLOEXEC);
if (fd < 0)
return -errno;
return get_block_device_harder_fd(fd, ret);
}
int lock_whole_block_device(dev_t devt, int operation) {
_cleanup_free_ char *whole_node = NULL;
_cleanup_close_ int lock_fd = -1;

1
src/shared/blockdev-util.h
View File

@@ -18,6 +18,7 @@ int block_get_originating(dev_t d, dev_t *ret);
int get_block_device_fd(int fd, dev_t *ret);
int get_block_device(const char *path, dev_t *dev);
int get_block_device_harder_fd(int fd, dev_t *dev);
int get_block_device_harder(const char *path, dev_t *dev);
int lock_whole_block_device(dev_t devt, int operation);