android_kernel_xiaomi_sm8350/fs/configfs
Louis Rilling 5301a77da2 configfs: Protect configfs_dirent s_links list mutations
Symlinks to a config_item are listed under its configfs_dirent s_links, but the
list mutations are not protected by any common lock.

This patch uses the configfs_dirent_lock spinlock to add the necessary
protection.

Note: we should also protect the list_empty() test in configfs_detach_prep() but
1/ the lock should not be released immediately because nothing would prevent the
list from being filled after a successful list_empty() test, making the problem
tricky,
2/ this will be solved by the rmdir() vs rename() deadlock bugfix.

Signed-off-by: Louis Rilling <Louis.Rilling@kerlabs.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
2008-07-14 13:57:16 -07:00
..
configfs_internal.h configfs: Introduce configfs_dirent_lock 2008-07-14 13:57:15 -07:00
dir.c configfs: Protect configfs_dirent s_links list mutations 2008-07-14 13:57:16 -07:00
file.c fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
inode.c configfs: Introduce configfs_dirent_lock 2008-07-14 13:57:15 -07:00
item.c
Makefile
mount.c fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
symlink.c configfs: Protect configfs_dirent s_links list mutations 2008-07-14 13:57:16 -07:00