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quota: Stop setting IMMUTABLE and NOATIME flags on quota files

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Currently we set IMMUTABLE and NOATIME flags on quota files to stop
userspace from messing with them. Now that all filesystems set these
flags in their quota_on handlers, we can stop setting the flags in
generic quota code. This will allow filesystems to stop copying i_flags
to their on-disk flags on various occasions.

Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2017-04-11 16:29:12 +02:00
parent 12fd086d39
commit aad6cde9ad
1 changed files with 5 additions and 14 deletions
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19
fs/quota/dquot.c
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@ -2188,8 +2188,7 @@ int dquot_disable(struct super_block *sb, int type, unsigned int flags)
/* This can happen when suspending quotas on remount-ro... */
if (toputinode[cnt] && !sb_has_quota_loaded(sb, cnt)) {
inode_lock(toputinode[cnt]);
toputinode[cnt]->i_flags &= ~(S_IMMUTABLE |
S_NOATIME | S_NOQUOTA);
toputinode[cnt]->i_flags &= ~S_NOQUOTA;
truncate_inode_pages(&toputinode[cnt]->i_data, 0);
inode_unlock(toputinode[cnt]);
mark_inode_dirty_sync(toputinode[cnt]);
@ -2237,7 +2236,6 @@ static int vfs_load_quota_inode(struct inode *inode, int type, int format_id,
struct super_block *sb = inode->i_sb;
struct quota_info *dqopt = sb_dqopt(sb);
int error;
int oldflags = -1;
if (!fmt)
return -ESRCH;
@ -2285,9 +2283,7 @@ static int vfs_load_quota_inode(struct inode *inode, int type, int format_id,
* possible) Also nobody should write to the file - we use
* special IO operations which ignore the immutable bit. */
inode_lock(inode);
oldflags = inode->i_flags & (S_NOATIME | S_IMMUTABLE |
S_NOQUOTA);
inode->i_flags |= S_NOQUOTA | S_NOATIME | S_IMMUTABLE;
inode->i_flags |= S_NOQUOTA;
inode_unlock(inode);
/*
* When S_NOQUOTA is set, remove dquot references as no more
@ -2329,14 +2325,9 @@ out_file_init:
dqopt->files[type] = NULL;
iput(inode);
out_file_flags:
if (oldflags != -1) {
inode_lock(inode);
/* Set the flags back (in the case of accidental quotaon()
* on a wrong file we don't want to mess up the flags) */
inode->i_flags &= ~(S_NOATIME | S_NOQUOTA | S_IMMUTABLE);
inode->i_flags |= oldflags;
inode_unlock(inode);
}
inode_lock(inode);
inode->i_flags &= ~S_NOQUOTA;
inode_unlock(inode);
out_fmt:
put_quota_format(fmt);