From 398b1ac5a57219823f942a8d3665b27ab99354de Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Wed, 19 Dec 2012 15:28:39 +0900 Subject: [PATCH] f2fs: fix handling errors got by f2fs_write_inode Ruslan reported that f2fs hangs with an infinite loop in f2fs_sync_file(): while (sync_node_pages(sbi, inode->i_ino, &wbc) == 0) f2fs_write_inode(inode, NULL); The reason was revealed that the cold flag is not set even thought this inode is a normal file. Therefore, sync_node_pages() skips to write node blocks since it only writes cold node blocks. The cold flag is stored to the node_footer in node block, and whenever a new node page is allocated, it is set according to its file type, file or directory. But, after sudden-power-off, when recovering the inode page, f2fs doesn't recover its cold flag. So, let's assign the cold flag in more right places. One more thing: If f2fs_write_inode() returns an error due to whatever situations, there would be no dirty node pages so that sync_node_pages() returns zero. (i.e., zero means nothing was written.) Reported-by: Ruslan N. Marchenko Signed-off-by: Jaegeuk Kim --- fs/f2fs/dir.c | 2 ++ fs/f2fs/file.c | 10 ++++++---- fs/f2fs/inode.c | 1 + fs/f2fs/node.c | 2 +- 4 files changed, 10 insertions(+), 5 deletions(-) diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index e1f66df0f97d..4a78d6c4f3a7 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -11,6 +11,7 @@ #include #include #include "f2fs.h" +#include "node.h" #include "acl.h" static unsigned long dir_blocks(struct inode *inode) @@ -308,6 +309,7 @@ static int init_inode_metadata(struct inode *inode, struct dentry *dentry) ipage = get_node_page(F2FS_SB(dir->i_sb), inode->i_ino); if (IS_ERR(ipage)) return PTR_ERR(ipage); + set_cold_node(inode, ipage); init_dent_inode(dentry, ipage); f2fs_put_page(ipage, 1); } diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index f9e085dfb1f0..7f9ea9271ebe 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -160,15 +160,17 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) if (need_to_sync_dir(sbi, inode)) need_cp = true; - f2fs_write_inode(inode, NULL); - if (need_cp) { /* all the dirty node pages should be flushed for POR */ ret = f2fs_sync_fs(inode->i_sb, 1); clear_inode_flag(F2FS_I(inode), FI_NEED_CP); } else { - while (sync_node_pages(sbi, inode->i_ino, &wbc) == 0) - f2fs_write_inode(inode, NULL); + /* if there is no written node page, write its inode page */ + while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { + ret = f2fs_write_inode(inode, NULL); + if (ret) + goto out; + } filemap_fdatawait_range(sbi->node_inode->i_mapping, 0, LONG_MAX); } diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index df5fb381ebf1..bf20b4d03214 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -203,6 +203,7 @@ void update_inode(struct inode *inode, struct page *node_page) ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags); ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino); ri->i_generation = cpu_to_le32(inode->i_generation); + set_cold_node(inode, node_page); set_page_dirty(node_page); } diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 19870361497e..dffac1c11f63 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -834,11 +834,11 @@ struct page *new_node_page(struct dnode_of_data *dn, unsigned int ofs) goto fail; } set_node_addr(sbi, &new_ni, NEW_ADDR); + set_cold_node(dn->inode, page); dn->node_page = page; sync_inode_page(dn); set_page_dirty(page); - set_cold_node(dn->inode, page); if (ofs == 0) inc_valid_inode_count(sbi); -- 2.30.2