GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-22 06:32:08 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

vfs: prevent remount read-only if pending removes

Browse source 
If there are any inodes on the super block that have been unlinked
(i_nlink == 0) but have not yet been deleted then prevent the
remounting the super block read-only.

Reported-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Miklos Szeredi 2011-11-21 12:11:33 +01:00 • committed by Al Viro
parent 7ada4db886
commit 8e8b87964b
4 changed files with 7 additions and 29 deletions
Download patch file Download diff file Expand all files Collapse all files

23
fs/file_table.c
View file

@ -474,29 +474,6 @@ void file_sb_list_del(struct file *file)
#endif
int fs_may_remount_ro(struct super_block *sb)
{
struct file *file;
/* Check that no files are currently opened for writing. */
lg_global_lock(files_lglock);
do_file_list_for_each_entry(sb, file) {
struct inode *inode = file->f_path.dentry->d_inode;
/* File with pending delete? */
if (inode->i_nlink == 0)
goto too_bad;
/* Writeable file? */
if (S_ISREG(inode->i_mode) && (file->f_mode & FMODE_WRITE))
goto too_bad;
} while_file_list_for_each_entry;
lg_global_unlock(files_lglock);
return 1; /* Tis' cool bro. */
too_bad:
lg_global_unlock(files_lglock);
return 0;
}
/**
* mark_files_ro - mark all files read-only
* @sb: superblock in question