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fsnotify: Open by handle via userns_call

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The syscall in question requires global CAP_DAC_READ_SEARCH.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Acked-by: Andrew Vagin <avagin@parallels.com>
This commit is contained in:
Pavel Emelyanov 2015-02-13 16:09:51 +04:00
parent b63b361c1a
commit 26ef786770
1 changed files with 6 additions and 1 deletions
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7
fsnotify.c
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@ -102,6 +102,11 @@ static void decode_handle(fh_t *handle, FhEntry *img)
sizeof(handle->__handle)));
}
static int open_by_handle(void *arg, int fd)
{
return sys_open_by_handle_at(fd, arg, O_PATH);
}
static int open_handle(unsigned int s_dev, unsigned long i_ino,
FhEntry *f_handle)
{
@ -119,7 +124,7 @@ static int open_handle(unsigned int s_dev, unsigned long i_ino,
goto out;
}
fd = sys_open_by_handle_at(mntfd, (void *)&handle, O_PATH);
fd = userns_call(open_by_handle, UNS_FDOUT, &handle, sizeof(handle), mntfd);
if (fd < 0) {
errno = -fd;
pr_perror("Can't open file handle for 0x%08x:0x%016lx",