Revision 9f141d6ef6258a3a37a045842d9ba7e68f368956 authored by Jan Kara on 19 October 2016, 12:34:31 UTC, committed by Dan Williams on 27 December 2016, 04:29:25 UTC
Currently ->iomap_begin() handler is called with entry lock held. If the filesystem held any locks between ->iomap_begin() and ->iomap_end() (such as ext4 which will want to hold transaction open), this would cause lock inversion with the iomap_apply() from standard IO path which first calls ->iomap_begin() and only then calls ->actor() callback which grabs entry locks for DAX (if it faults when copying from/to user provided buffers). Fix the problem by nesting grabbing of entry lock inside ->iomap_begin() - ->iomap_end() pair. Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
1 parent f449b93
| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 4.1 KB |
| Makefile | -rw-r--r-- | 426 bytes |
| dir.c | -rw-r--r-- | 30.9 KB |
| file.c | -rw-r--r-- | 5.8 KB |
| getopt.c | -rw-r--r-- | 1.8 KB |
| getopt.h | -rw-r--r-- | 367 bytes |
| inode.c | -rw-r--r-- | 27.2 KB |
| ioctl.c | -rw-r--r-- | 22.7 KB |
| mmap.c | -rw-r--r-- | 2.8 KB |
| ncp_fs.h | -rw-r--r-- | 2.8 KB |
| ncp_fs_i.h | -rw-r--r-- | 571 bytes |
| ncp_fs_sb.h | -rw-r--r-- | 5.0 KB |
| ncplib_kernel.c | -rw-r--r-- | 32.4 KB |
| ncplib_kernel.h | -rw-r--r-- | 6.8 KB |
| ncpsign_kernel.c | -rw-r--r-- | 3.6 KB |
| ncpsign_kernel.h | -rw-r--r-- | 700 bytes |
| sock.c | -rw-r--r-- | 22.5 KB |
| symlink.c | -rw-r--r-- | 4.2 KB |
Computing file changes ...
