[PATCH 6.6 393/638] quota: Properly annotate i_dquot arrays with __rcu

Sasha Levin
2024-03-24T23:07:43Z

From: Jan Kara <jack@suse.cz>

[ Upstream commit ccb49011bb2ebfd66164dbf68c5bff48917bb5ef ]

Dquots pointed to from i_dquot arrays in inodes are protected by
dquot_srcu. Annotate them as such and change .get_dquots callback to
return properly annotated pointer to make sparse happy.

Fixes: b9ba6f94b238 ("quota: remove dqptr_sem")
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/ext2/ext2.h | 2 +-
fs/ext2/super.c | 2 +-
fs/ext4/ext4.h | 2 +-
fs/ext4/super.c | 2 +-
fs/f2fs/f2fs.h | 2 +-
fs/f2fs/super.c | 2 +-
fs/jfs/jfs_incore.h | 2 +-
fs/jfs/super.c | 2 +-
fs/ocfs2/inode.h | 2 +-
fs/ocfs2/super.c | 2 +-
fs/quota/dquot.c | 3 +--
fs/reiserfs/reiserfs.h | 2 +-
fs/reiserfs/super.c | 2 +-
include/linux/fs.h | 2 +-
include/linux/shmem_fs.h | 2 +-
mm/shmem.c | 2 +-
16 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 7fdd685c384d6..02255185d68ef 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -674,7 +674,7 @@ struct ext2_inode_info {
struct inode vfs_inode;
struct list_head i_orphan; /* unlinked but open inodes */
#ifdef CONFIG_QUOTA
- struct dquot *i_dquot[MAXQUOTAS];
+ struct dquot __rcu *i_dquot[MAXQUOTAS];
#endif
};

diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index aaf3e3e88cb21..5bcf5623b46cc 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -320,7 +320,7 @@ static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data, siz
static ssize_t ext2_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off);
static int ext2_quota_on(struct super_block *sb, int type, int format_id,
const struct path *path);
-static struct dquot **ext2_get_dquots(struct inode *inode)
+static struct dquot __rcu **ext2_get_dquots(struct inode *inode)
{
return EXT2_I(inode)->i_dquot;
}
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index cd4ccae1e28a1..7bbf0b9bdff23 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1146,7 +1146,7 @@ struct ext4_inode_info {
tid_t i_datasync_tid;

#ifdef CONFIG_QUOTA
- struct dquot *i_dquot[MAXQUOTAS];
+ struct dquot __rcu *i_dquot[MAXQUOTAS];
#endif

/* Precomputed uuid+inum+igen checksum for seeding inode checksums */
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index d062383ea50ef..3ea4d8f11e7bb 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1593,7 +1593,7 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
static int ext4_quota_enable(struct super_block *sb, int type, int format_id,
unsigned int flags);

-static struct dquot **ext4_get_dquots(struct inode *inode)
+static struct dquot __rcu **ext4_get_dquots(struct inode *inode)
{
return EXT4_I(inode)->i_dquot;
}
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 6d688e42d89c5..ac924c8226e3c 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -824,7 +824,7 @@ struct f2fs_inode_info {
spinlock_t i_size_lock; /* protect last_disk_size */

#ifdef CONFIG_QUOTA
- struct dquot *i_dquot[MAXQUOTAS];
+ struct dquot __rcu *i_dquot[MAXQUOTAS];

/* quota space reservation, managed internally by quota code */
qsize_t i_reserved_quota;
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index bc303a0522155..d0a659b906656 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -2756,7 +2756,7 @@ int f2fs_dquot_initialize(struct inode *inode)
return dquot_initialize(inode);
}

-static struct dquot **f2fs_get_dquots(struct inode *inode)
+static struct dquot __rcu **f2fs_get_dquots(struct inode *inode)
{
return F2FS_I(inode)->i_dquot;
}
diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h
index 721def69e732e..d3c35068cb761 100644
--- a/fs/jfs/jfs_incore.h
+++ b/fs/jfs/jfs_incore.h
@@ -92,7 +92,7 @@ struct jfs_inode_info {
} link;
} u;
#ifdef CONFIG_QUOTA
- struct dquot *i_dquot[MAXQUOTAS];
+ struct dquot __rcu *i_dquot[MAXQUOTAS];
#endif
u32 dev; /* will die when we get wide dev_t */
struct inode vfs_inode;
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 2e2f7f6d36a09..c4f565770d316 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -824,7 +824,7 @@ static ssize_t jfs_quota_write(struct super_block *sb, int type,
return len - towrite;
}

-static struct dquot **jfs_get_dquots(struct inode *inode)
+static struct dquot __rcu **jfs_get_dquots(struct inode *inode)
{
return JFS_IP(inode)->i_dquot;
}
diff --git a/fs/ocfs2/inode.h b/fs/ocfs2/inode.h
index 82b28fdacc7e9..accf03d4765ed 100644
--- a/fs/ocfs2/inode.h
+++ b/fs/ocfs2/inode.h
@@ -65,7 +65,7 @@ struct ocfs2_inode_info
tid_t i_sync_tid;
tid_t i_datasync_tid;

- struct dquot *i_dquot[MAXQUOTAS];
+ struct dquot __rcu *i_dquot[MAXQUOTAS];
};

/*
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 6b906424902b4..1259fe02cd53b 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -122,7 +122,7 @@ static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
static int ocfs2_enable_quotas(struct ocfs2_super *osb);
static void ocfs2_disable_quotas(struct ocfs2_super *osb);

-static struct dquot **ocfs2_get_dquots(struct inode *inode)
+static struct dquot __rcu **ocfs2_get_dquots(struct inode *inode)
{
return OCFS2_I(inode)->i_dquot;
}
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index c6bd7ee20f009..7a2c9b153be6e 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -1008,8 +1008,7 @@ EXPORT_SYMBOL(dqget);

static inline struct dquot __rcu **i_dquot(struct inode *inode)
{
- /* Force __rcu for now until filesystems are fixed */
- return (struct dquot __rcu **)inode->i_sb->s_op->get_dquots(inode);
+ return inode->i_sb->s_op->get_dquots(inode);
}

static int dqinit_needed(struct inode *inode, int type)
diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h
index 7d12b8c5b2fa8..e594ad8d759e2 100644
--- a/fs/reiserfs/reiserfs.h
+++ b/fs/reiserfs/reiserfs.h
@@ -97,7 +97,7 @@ struct reiserfs_inode_info {
struct rw_semaphore i_xattr_sem;
#endif
#ifdef CONFIG_QUOTA
- struct dquot *i_dquot[MAXQUOTAS];
+ struct dquot __rcu *i_dquot[MAXQUOTAS];
#endif

struct inode vfs_inode;
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 7eaf36b3de12b..309f9d39ba724 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -802,7 +802,7 @@ static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
loff_t);

-static struct dquot **reiserfs_get_dquots(struct inode *inode)
+static struct dquot __rcu **reiserfs_get_dquots(struct inode *inode)
{
return REISERFS_I(inode)->i_dquot;
}
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 62102f8697946..ee5efad0d7801 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2079,7 +2079,7 @@ struct super_operations {
#ifdef CONFIG_QUOTA
ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
- struct dquot **(*get_dquots)(struct inode *);
+ struct dquot __rcu **(*get_dquots)(struct inode *);
#endif
long (*nr_cached_objects)(struct super_block *,
struct shrink_control *);
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index 6b0c626620f5c..fa99e68e5e776 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -32,7 +32,7 @@ struct shmem_inode_info {
struct timespec64 i_crtime; /* file creation time */
unsigned int fsflags; /* flags for FS_IOC_[SG]ETFLAGS */
#ifdef CONFIG_TMPFS_QUOTA
- struct dquot *i_dquot[MAXQUOTAS];
+ struct dquot __rcu *i_dquot[MAXQUOTAS];
#endif
struct offset_ctx dir_offsets; /* stable entry offsets */
struct inode vfs_inode;
diff --git a/mm/shmem.c b/mm/shmem.c
index e826be732b9bb..80c2666114b3e 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -311,7 +311,7 @@ static void shmem_disable_quotas(struct super_block *sb)
dquot_quota_off(sb, type);
}

-static struct dquot **shmem_get_dquots(struct inode *inode)
+static struct dquot __rcu **shmem_get_dquots(struct inode *inode)
{
return SHMEM_I(inode)->i_dquot;
}
--
2.43.0