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| author | Lennart Poettering <lennart@poettering.net> | 2023-04-28 15:16:00 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2023-04-28 15:16:30 +0200 |
| commit | 535358ad2e0f844c77dbacff37ad456e8ffed8a2 (patch) | |
| tree | ecdd6946ab27a535d989777d534bab73f5a04eca /src/shared/copy.c | |
| parent | copy: don't call clone ioctls twice (diff) | |
| download | systemd-535358ad2e0f844c77dbacff37ad456e8ffed8a2.tar.xz systemd-535358ad2e0f844c77dbacff37ad456e8ffed8a2.zip | |
copy: shortcut reflink_range() to reflink() in some cases
Diffstat (limited to '')
| -rw-r--r-- | src/shared/copy.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/shared/copy.c b/src/shared/copy.c index 90c6e2c0ef..14b9b61d8a 100644 --- a/src/shared/copy.c +++ b/src/shared/copy.c @@ -1631,6 +1631,12 @@ int reflink_range(int infd, uint64_t in_offset, int outfd, uint64_t out_offset, assert(infd >= 0); assert(outfd >= 0); + /* Inside the kernel, FICLONE is identical to FICLONERANGE with offsets and size set to zero, let's + * simplify things and use the simple ioctl in that case. Also, do the same if the size is + * UINT64_MAX, which is how we usually encode "everything". */ + if (in_offset == 0 && out_offset == 0 && IN_SET(sz, 0, UINT64_MAX)) + return reflink(infd, outfd); + r = fd_verify_regular(outfd); if (r < 0) return r; |