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authorJaegeuk Kim <jaegeuk@kernel.org>2014-10-13 19:42:53 -0700
committerJaegeuk Kim <jaegeuk@kernel.org>2014-11-03 16:07:33 -0800
commitbce8d1120707c06088928b2ee52a58703d74ac29 (patch)
treec9320f0274a9eabcc163f9d16dcd163ba3a304bb /fs/f2fs/dir.c
parent59a0615540812297e4ff9673de5c1269413d0c40 (diff)
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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: [<ffffffff8173dc40>] ? bit_wait+0x50/0x50 [<ffffffff8173d4cd>] io_schedule+0x9d/0x130 [<ffffffff8173dc6c>] bit_wait_io+0x2c/0x50 [<ffffffff8173da3b>] __wait_on_bit_lock+0x4b/0xb0 [<ffffffff811640a7>] __lock_page+0x67/0x70 [<ffffffff810acf50>] ? autoremove_wake_function+0x40/0x40 [<ffffffff811652cc>] pagecache_get_page+0x14c/0x1e0 [<ffffffffa029afa9>] get_node_page+0x59/0x130 [f2fs] [<ffffffffa02a63ad>] read_all_xattrs+0x24d/0x430 [f2fs] [<ffffffffa02a6ca2>] f2fs_getxattr+0x52/0xe0 [f2fs] [<ffffffffa02a7481>] f2fs_get_acl+0x41/0x2d0 [f2fs] [<ffffffff8122d847>] get_acl+0x47/0x70 [<ffffffff8122db5a>] posix_acl_create+0x5a/0x150 [<ffffffffa02a7759>] f2fs_init_acl+0x29/0xcb [f2fs] [<ffffffffa0286a8d>] init_inode_metadata+0x5d/0x340 [f2fs] [<ffffffffa029253a>] f2fs_add_inline_entry+0x12a/0x2e0 [f2fs] [<ffffffffa0286ea5>] __f2fs_add_link+0x45/0x4a0 [f2fs] [<ffffffffa028b5b6>] ? f2fs_new_inode+0x146/0x220 [f2fs] [<ffffffffa028b816>] f2fs_mknod+0x86/0xf0 [f2fs] [<ffffffff811e3ec1>] vfs_mknod+0xe1/0x160 [<ffffffff811e4b26>] SyS_mknod+0x1f6/0x200 [<ffffffff81741d7f>] tracesys+0xe1/0xe6 Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/dir.c')
-rw-r--r--fs/f2fs/dir.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 35cb1b3d94b9..e5439dd67f4e 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -363,8 +363,8 @@ static int make_empty_dir(struct inode *inode,
return 0;
}
-struct page *init_inode_metadata(struct inode *inode,
- struct inode *dir, const struct qstr *name)
+struct page *init_inode_metadata(struct inode *inode, struct inode *dir,
+ const struct qstr *name, struct page *dpage)
{
struct page *page;
int err;
@@ -380,7 +380,7 @@ struct page *init_inode_metadata(struct inode *inode,
goto error;
}
- err = f2fs_init_acl(inode, dir, page);
+ err = f2fs_init_acl(inode, dir, page, dpage);
if (err)
goto put_error;
@@ -541,7 +541,7 @@ add_dentry:
f2fs_wait_on_page_writeback(dentry_page, DATA);
down_write(&F2FS_I(inode)->i_sem);
- page = init_inode_metadata(inode, dir, name);
+ page = init_inode_metadata(inode, dir, name, NULL);
if (IS_ERR(page)) {
err = PTR_ERR(page);
goto fail;
@@ -580,7 +580,7 @@ int f2fs_do_tmpfile(struct inode *inode, struct inode *dir)
int err = 0;
down_write(&F2FS_I(inode)->i_sem);
- page = init_inode_metadata(inode, dir, NULL);
+ page = init_inode_metadata(inode, dir, NULL, NULL);
if (IS_ERR(page)) {
err = PTR_ERR(page);
goto fail;