From bce8d1120707c06088928b2ee52a58703d74ac29 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Mon, 13 Oct 2014 19:42:53 -0700 Subject: f2fs: avoid deadlock on init_inode_metadata Previously, init_inode_metadata does not hold any parent directory's inode page. So, f2fs_init_acl can grab its parent inode page without any problem. But, when we use inline_dentry, that page is grabbed during f2fs_add_link, so that we can fall into deadlock condition like below. INFO: task mknod:11006 blocked for more than 120 seconds. Tainted: G OE 3.17.0-rc1+ #13 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. mknod D ffff88003fc94580 0 11006 11004 0x00000000 ffff880007717b10 0000000000000002 ffff88003c323220 ffff880007717fd8 0000000000014580 0000000000014580 ffff88003daecb30 ffff88003c323220 ffff88003fc94e80 ffff88003ffbb4e8 ffff880007717ba0 0000000000000002 Call Trace: [] ? bit_wait+0x50/0x50 [] io_schedule+0x9d/0x130 [] bit_wait_io+0x2c/0x50 [] __wait_on_bit_lock+0x4b/0xb0 [] __lock_page+0x67/0x70 [] ? autoremove_wake_function+0x40/0x40 [] pagecache_get_page+0x14c/0x1e0 [] get_node_page+0x59/0x130 [f2fs] [] read_all_xattrs+0x24d/0x430 [f2fs] [] f2fs_getxattr+0x52/0xe0 [f2fs] [] f2fs_get_acl+0x41/0x2d0 [f2fs] [] get_acl+0x47/0x70 [] posix_acl_create+0x5a/0x150 [] f2fs_init_acl+0x29/0xcb [f2fs] [] init_inode_metadata+0x5d/0x340 [f2fs] [] f2fs_add_inline_entry+0x12a/0x2e0 [f2fs] [] __f2fs_add_link+0x45/0x4a0 [f2fs] [] ? f2fs_new_inode+0x146/0x220 [f2fs] [] f2fs_mknod+0x86/0xf0 [f2fs] [] vfs_mknod+0xe1/0x160 [] SyS_mknod+0x1f6/0x200 [] tracesys+0xe1/0xe6 Signed-off-by: Jaegeuk Kim --- fs/f2fs/xattr.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'fs/f2fs/xattr.c') diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c index deca8728117b..5072bf9ae0ef 100644 --- a/fs/f2fs/xattr.c +++ b/fs/f2fs/xattr.c @@ -83,7 +83,7 @@ static int f2fs_xattr_generic_get(struct dentry *dentry, const char *name, } if (strcmp(name, "") == 0) return -EINVAL; - return f2fs_getxattr(dentry->d_inode, type, name, buffer, size); + return f2fs_getxattr(dentry->d_inode, type, name, buffer, size, NULL); } static int f2fs_xattr_generic_set(struct dentry *dentry, const char *name, @@ -398,7 +398,7 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize, } int f2fs_getxattr(struct inode *inode, int index, const char *name, - void *buffer, size_t buffer_size) + void *buffer, size_t buffer_size, struct page *ipage) { struct f2fs_xattr_entry *entry; void *base_addr; @@ -412,7 +412,7 @@ int f2fs_getxattr(struct inode *inode, int index, const char *name, if (len > F2FS_NAME_LEN) return -ERANGE; - base_addr = read_all_xattrs(inode, NULL); + base_addr = read_all_xattrs(inode, ipage); if (!base_addr) return -ENOMEM; -- cgit v1.2.3-59-g8ed1b