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uapi: deprecate STATX_ALL

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Constants of the *_ALL type can be actively harmful due to the fact that
developers will usually fail to consider the possible effects of future
changes to the definition.

Deprecate STATX_ALL in the uapi, while no damage has been done yet.

We could keep something like this around in the kernel, but there's
actually no point, since all filesystems should be explicitly checking
flags that they support and not rely on the VFS masking unknown ones out: a
flag could be known to the VFS, yet not known to the filesystem.

Cc: David Howells <dhowells@redhat.com>
Cc: linux-api@vger.kernel.org
Cc: linux-man@vger.kernel.org
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Miklos Szeredi
2020-05-14 16:44:24 +02:00
parent 44a3b87444
commit 581701b7ef
4 changed files with 21 additions and 4 deletions
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fs/stat.c
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@@ -70,7 +70,6 @@ int vfs_getattr_nosec(const struct path *path, struct kstat *stat,
memset(stat, 0, sizeof(*stat));
stat->result_mask |= STATX_BASIC_STATS;
request_mask &= STATX_ALL;
query_flags &= KSTAT_QUERY_FLAGS;
/* allow the fs to override these if it really wants to */