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fuse-overlayfs: on link(2) set the redirect link from the source

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Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This commit is contained in:
Giuseppe Scrivano 2018-07-09 20:42:14 +02:00
parent 5c3e2c330b
commit b78f52f24b
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GPG Key ID: E4730F97F60286ED
1 changed files with 15 additions and 1 deletions
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16
main.c
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@ -2105,7 +2105,21 @@ ovl_link (fuse_req_t req, fuse_ino_t ino, fuse_ino_t newparent, const char *newn
int dfd = TEMP_FAILURE_RETRY (openat (node_dirfd (newparentnode), path, O_WRONLY));
if (dfd >= 0)
{
fsetxattr (dfd, REDIRECT_XATTR, node->path, strlen (node->path), 0);
bool set = false;
int sfd = TEMP_FAILURE_RETRY (openat (node_dirfd (node), node->path, O_RDONLY));
if (sfd >= 0)
{
char redirect_path[PATH_MAX + 10];
ssize_t s = fgetxattr (sfd, REDIRECT_XATTR, redirect_path, sizeof (redirect_path));
if (s > 0)
{
set = fsetxattr (dfd, REDIRECT_XATTR, redirect_path, s, 0) == 0;
}
close (sfd);
}
if (! set)
fsetxattr (dfd, REDIRECT_XATTR, node->path, strlen (node->path), 0);
close (dfd);
}
}