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| author | Miklos Szeredi <mszeredi@suse.cz> | 2011-11-21 12:11:33 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-01-06 23:20:13 -0500 |
| commit | 8e8b87964bc8dc5c14b6543fc933b7725f07d3ac (patch) | |
| tree | 9a14c135741f3a8ba960ff97f060a58597604a6d /fs/file_table.c | |
| parent | 7ada4db88634429f4da690ad1c4eb73c93085f0c (diff) | |
| download | lwn-8e8b87964bc8dc5c14b6543fc933b7725f07d3ac.tar.gz lwn-8e8b87964bc8dc5c14b6543fc933b7725f07d3ac.zip | |
vfs: prevent remount read-only if pending removes
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>
Diffstat (limited to 'fs/file_table.c')
| -rw-r--r-- | fs/file_table.c | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/fs/file_table.c b/fs/file_table.c index c322794f7360..20002e39754d 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -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 |