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authorJan Kara <jack@suse.cz>2011-11-16 15:03:59 +0100
committerJan Kara <jack@suse.cz>2012-01-12 13:09:09 +0100
commit46fe44ce8777f087aa8ad4a2605fdcfb9c2d63af (patch)
treefd33eed190c800f77e41a817f697cd0957d28647
parentext2: protect inode changes in the SETVERSION and SETFLAGS ioctls (diff)
downloadlinux-46fe44ce8777f087aa8ad4a2605fdcfb9c2d63af.tar.xz
linux-46fe44ce8777f087aa8ad4a2605fdcfb9c2d63af.zip
quota: Pass information that quota is stored in system file to userspace
Quota tools need to know whether quota is stored in a system file or in classical aquota.{user|group} files. So pass this information as a flag in GETINFO quotactl. Signed-off-by: Jan Kara <jack@suse.cz>
-rw-r--r--fs/quota/dquot.c8
-rw-r--r--include/linux/quota.h6
2 files changed, 10 insertions, 4 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 5ec59b20cf76..46741970371b 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -2125,6 +2125,8 @@ static int vfs_load_quota_inode(struct inode *inode, int type, int format_id,
mutex_unlock(&dqopt->dqio_mutex);
goto out_file_init;
}
+ if (dqopt->flags & DQUOT_QUOTA_SYS_FILE)
+ dqopt->info[type].dqi_flags |= DQF_SYS_FILE;
mutex_unlock(&dqopt->dqio_mutex);
spin_lock(&dq_state_lock);
dqopt->flags |= dquot_state_flag(flags, type);
@@ -2464,7 +2466,7 @@ int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii)
spin_lock(&dq_data_lock);
ii->dqi_bgrace = mi->dqi_bgrace;
ii->dqi_igrace = mi->dqi_igrace;
- ii->dqi_flags = mi->dqi_flags & DQF_MASK;
+ ii->dqi_flags = mi->dqi_flags & DQF_GETINFO_MASK;
ii->dqi_valid = IIF_ALL;
spin_unlock(&dq_data_lock);
mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
@@ -2490,8 +2492,8 @@ int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii)
if (ii->dqi_valid & IIF_IGRACE)
mi->dqi_igrace = ii->dqi_igrace;
if (ii->dqi_valid & IIF_FLAGS)
- mi->dqi_flags = (mi->dqi_flags & ~DQF_MASK) |
- (ii->dqi_flags & DQF_MASK);
+ mi->dqi_flags = (mi->dqi_flags & ~DQF_SETINFO_MASK) |
+ (ii->dqi_flags & DQF_SETINFO_MASK);
spin_unlock(&dq_data_lock);
mark_info_dirty(sb, type);
/* Force write to disk */
diff --git a/include/linux/quota.h b/include/linux/quota.h
index cb7855699037..c09fa042b5ea 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -230,7 +230,11 @@ struct mem_dqinfo {
struct super_block;
#define DQF_MASK 0xffff /* Mask for format specific flags */
-#define DQF_INFO_DIRTY_B 16
+#define DQF_GETINFO_MASK 0x1ffff /* Mask for flags passed to userspace */
+#define DQF_SETINFO_MASK 0xffff /* Mask for flags modifiable from userspace */
+#define DQF_SYS_FILE_B 16
+#define DQF_SYS_FILE (1 << DQF_SYS_FILE_B) /* Quota file stored as system file */
+#define DQF_INFO_DIRTY_B 31
#define DQF_INFO_DIRTY (1 << DQF_INFO_DIRTY_B) /* Is info dirty? */
extern void mark_info_dirty(struct super_block *sb, int type);