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authorMiklos Szeredi <mszeredi@suse.cz>2011-11-21 12:11:33 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2012-01-06 23:20:13 -0500
commit8e8b87964bc8dc5c14b6543fc933b7725f07d3ac (patch)
tree9a14c135741f3a8ba960ff97f060a58597604a6d /fs/file_table.c
parent7ada4db88634429f4da690ad1c4eb73c93085f0c (diff)
downloadop-kernel-dev-8e8b87964bc8dc5c14b6543fc933b7725f07d3ac.zip
op-kernel-dev-8e8b87964bc8dc5c14b6543fc933b7725f07d3ac.tar.gz
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.c23
1 files changed, 0 insertions, 23 deletions
diff --git a/fs/file_table.c b/fs/file_table.c
index c322794..20002e3 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
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