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loop-util: keep track of inode/devnum of backing file

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This commit is contained in:
Lennart Poettering
2023-03-09 16:40:55 +01:00
parent be86e98350
commit 4d2a9e3ea6
2 changed files with 13 additions and 3 deletions
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src/shared/loop-util.h
+4 -2
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@@ -14,12 +14,14 @@ struct LoopDevice {
unsigned n_ref;
int fd;
int lock_fd;
int nr; /* The loopback device index (i.e. 4 for /dev/loop4); if this object encapsulates a non-loopback block device, set to -1 */
dev_t devno;
int nr; /* The loopback device index (i.e. 4 for /dev/loop4); if this object encapsulates a non-loopback block device, set to -1 */
dev_t devno; /* The loopback device's own dev_t */
char *node;
sd_device *dev;
char *backing_file;
bool relinquished;
dev_t backing_devno; /* The backing file's dev_t */
ino_t backing_inode; /* The backing file's ino_t */
uint64_t diskseq; /* Block device sequence number, monothonically incremented by the kernel on create/attach, or 0 if we don't know */
uint64_t uevent_seqnum_not_before; /* uevent sequm right before we attached the loopback device, or UINT64_MAX if we don't know */
usec_t timestamp_not_before; /* CLOCK_MONOTONIC timestamp taken immediately before attaching the loopback device, or USEC_INFINITY if we don't know */