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650495dedc
In get_lock_data_page, if there is a data race between get_dnode_of_data for node and grab_cache_page for data, f2fs is able to face with the following BUG_ON(dn.data_blkaddr == NEW_ADDR). kernel BUG at /home/zeus/f2fs_test/src/fs/f2fs/data.c:251! [<ffffffffa044966c>] get_lock_data_page+0x1ec/0x210 [f2fs] Call Trace: [<ffffffffa043b089>] f2fs_readdir+0x89/0x210 [f2fs] [<ffffffff811a0920>] ? fillonedir+0x100/0x100 [<ffffffff811a0920>] ? fillonedir+0x100/0x100 [<ffffffff811a07f8>] vfs_readdir+0xb8/0xe0 [<ffffffff811a0b4f>] sys_getdents+0x8f/0x110 [<ffffffff816d7999>] system_call_fastpath+0x16/0x1b This bug is able to be occurred when the block address of the data block is changed after f2fs_put_dnode(). In order to avoid that, this patch fixes the lock order of node and data blocks in which the node block lock is covered by the data block lock. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com> |
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| .. | ||
| acl.c | ||
| acl.h | ||
| checkpoint.c | ||
| data.c | ||
| debug.c | ||
| dir.c | ||
| f2fs.h | ||
| file.c | ||
| gc.c | ||
| gc.h | ||
| hash.c | ||
| inode.c | ||
| Kconfig | ||
| Makefile | ||
| namei.c | ||
| node.c | ||
| node.h | ||
| recovery.c | ||
| segment.c | ||
| segment.h | ||
| super.c | ||
| xattr.c | ||
| xattr.h | ||