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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-03-11 09:30:33 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-03-12 10:17:31 -0300 |
| commit | b2970919ba2d6c162bbe2b6d3b384968406e331b (patch) | |
| tree | 1b98d669972c974fd173fd24d274487c200ebf98 /support/support.h | |
| parent | 20bee7134801cc932ff87fac511289b92fc94944 (diff) | |
| download | glibc-b2970919ba2d6c162bbe2b6d3b384968406e331b.tar.xz glibc-b2970919ba2d6c162bbe2b6d3b384968406e331b.zip | |
io: Return UNSUPPORTED if filesystem do not support 64 bit timestamps
Some Linux filesystems might not fully support 64 bit timestamps [1],
which make some Linux specific tests to fail when they check for the
functionality.
This patch adds a new libsupport function, support_path_support_time64,
that returns whether the target file supports or not 64 bit timestamps.
The support is checked by issuing a utimensat and verifying both the
last access and last modification time against a statx call.
The tests that might fail are also adjusted to check the file support
as well:
$ dd if=/dev/zero of=loopbackfile.img bs=100M count=1
1+0 records in
1+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0,0589568 s, 1,8 GB/s
$ sudo losetup -fP loopbackfile.img
$ mkfs.xfs loopbackfile.img
meta-data=loopbackfile.img isize=512 agcount=4, agsize=6400 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=1, sparse=1, rmapbt=0
= reflink=1
data = bsize=4096 blocks=25600, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0, ftype=1
log =internal log bsize=4096 blocks=1368, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
$ mkdir loopfs
$ sudo mount -o loop /dev/loop0 loopfs/
$ sudo chown -R azanella:azanella loopfs
$ TMPDIR=loopfs/ ./testrun.sh misc/tst-utimes
error: ../sysdeps/unix/sysv/linux/tst-utimes.c:55: File loopfs//utimesfECsK1 does not support 64-bit timestamps
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1795576
Diffstat (limited to 'support/support.h')
| -rw-r--r-- | support/support.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/support/support.h b/support/support.h index 9cbc455720..2e477c9e7c 100644 --- a/support/support.h +++ b/support/support.h @@ -23,6 +23,7 @@ #ifndef SUPPORT_H #define SUPPORT_H +#include <stdbool.h> #include <stddef.h> #include <sys/cdefs.h> /* For mode_t. */ @@ -129,6 +130,10 @@ extern void support_copy_file (const char *from, const char *to); extern ssize_t support_copy_file_range (int, off64_t *, int, off64_t *, size_t, unsigned int); +/* Return true is PATH supports 64-bit time_t interfaces for file + operations (such as fstatat or utimensat). */ +extern bool support_path_support_time64 (const char *path); + __END_DECLS #endif /* SUPPORT_H */ |