From: Lokesh Nagappa Jaliminche <lokesh.jalimin...@seagate.com> ll_find_alias is responsible for getting alias for inode which can be reused. Directories are assumed to have unique alias, where in case of non-directories there can be multiple aliases. In case of lustre there can be two type of aliases i.e. discon_alias and invalid_alias. Usage of discon_alias in case of non-directories may corrupt dcache and leads to kernel crash. Changes made to avoid use of discon_alias in case of non-directories.
Seagate-bug-id: MRP-2739, MRP-3601 Signed-off-by: Lokesh Nagappa Jaliminche <lokesh.jalimin...@seagate.com> Reviewed-by: Ujjwal Lanjewar <ujjwal.lanje...@seagate.com> Reviewed-by: Ashish Purkar <ashish.pur...@seagate.com> Reviewed-by: Andrew Perepechko <andrew.perepec...@seagate.com> Tested-by: Parinay Vijayprakash Kondekar <parinay.konde...@seagate.com> Reviewed-on: http://review.whamcloud.com/17732 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7613 Reviewed-by: Niu Yawei <yawei....@intel.com> Signed-off-by: Oleg Drokin <gr...@linuxhacker.ru> --- drivers/staging/lustre/lustre/llite/namei.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/staging/lustre/lustre/llite/namei.c b/drivers/staging/lustre/lustre/llite/namei.c index 788a3f0..b7d448f 100644 --- a/drivers/staging/lustre/lustre/llite/namei.c +++ b/drivers/staging/lustre/lustre/llite/namei.c @@ -363,7 +363,8 @@ static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry) LASSERT(alias != dentry); spin_lock(&alias->d_lock); - if (alias->d_flags & DCACHE_DISCONNECTED) + if ((alias->d_flags & DCACHE_DISCONNECTED) && + S_ISDIR(inode->i_mode)) /* LASSERT(last_discon == NULL); LU-405, bz 20055 */ discon_alias = alias; else if (alias->d_parent == dentry->d_parent && -- 2.7.4
