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loop-util: add new loop_device_make_by_path_memory() helper

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This uses the new memfd_clone_fd() call to make an in-memory copy of
some file before setting up a loopback block device on it.
This commit is contained in:
Lennart Poettering
2022-12-08 12:47:28 +01:00
parent 6bea3d8e0f
commit fcd8a19da8
2 changed files with 43 additions and 0 deletions
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src/shared/loop-util.h
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@@ -30,6 +30,7 @@ struct LoopDevice {
int loop_device_make(int fd, int open_flags, uint64_t offset, uint64_t size, uint32_t block_size, uint32_t loop_flags, int lock_op, LoopDevice **ret);
int loop_device_make_by_path(const char *path, int open_flags, uint32_t loop_flags, int lock_op, LoopDevice **ret);
int loop_device_make_by_path_memory(const char *path, int open_flags, uint32_t loop_flags, int lock_op, LoopDevice **ret);
int loop_device_open(sd_device *dev, int open_flags, int lock_op, LoopDevice **ret);
int loop_device_open_from_fd(int fd, int open_flags, int lock_op, LoopDevice **ret);
int loop_device_open_from_path(const char *path, int open_flags, int lock_op, LoopDevice **ret);