#include "opts.h"
#include "str_hash.h"
#include "quota_types.h"
+#include "two_state_shared_lock.h"
#include <linux/seqlock.h>
#include <linux/stat.h>
-/*
- * Two-state lock - can be taken for add or block - both states are shared,
- * like read side of rwsem, but conflict with other state:
- */
-struct pagecache_lock {
- atomic_long_t v;
- wait_queue_head_t wait;
-};
-
-static inline void pagecache_lock_init(struct pagecache_lock *lock)
-{
- atomic_long_set(&lock->v, 0);
- init_waitqueue_head(&lock->wait);
-}
-
-void bch2_pagecache_add_put(struct pagecache_lock *);
-bool bch2_pagecache_add_tryget(struct pagecache_lock *);
-void bch2_pagecache_add_get(struct pagecache_lock *);
-void bch2_pagecache_block_put(struct pagecache_lock *);
-void bch2_pagecache_block_get(struct pagecache_lock *);
-
struct bch_inode_info {
struct inode v;
+ struct list_head ei_vfs_inode_list;
unsigned long ei_flags;
struct mutex ei_update_lock;
- u64 ei_journal_seq;
u64 ei_quota_reserved;
unsigned long ei_last_dirtied;
-
- struct pagecache_lock ei_pagecache_lock;
+ two_state_lock_t ei_pagecache_lock;
struct mutex ei_quota_lock;
struct bch_qid ei_qid;
+ u32 ei_subvol;
+
+ /*
+ * When we've been doing nocow writes we'll need to issue flushes to the
+ * underlying block devices
+ *
+ * XXX: a device may have had a flush issued by some other codepath. It
+ * would be better to keep for each device a sequence number that's
+ * incremented when we isusue a cache flush, and track here the sequence
+ * number that needs flushing.
+ */
+ struct bch_devs_mask ei_devs_need_flush;
+
/* copy of inode in btree: */
struct bch_inode_unpacked ei_inode;
};
+#define bch2_pagecache_add_put(i) bch2_two_state_unlock(&i->ei_pagecache_lock, 0)
+#define bch2_pagecache_add_tryget(i) bch2_two_state_trylock(&i->ei_pagecache_lock, 0)
+#define bch2_pagecache_add_get(i) bch2_two_state_lock(&i->ei_pagecache_lock, 0)
+
+#define bch2_pagecache_block_put(i) bch2_two_state_unlock(&i->ei_pagecache_lock, 1)
+#define bch2_pagecache_block_get(i) bch2_two_state_lock(&i->ei_pagecache_lock, 1)
+
+static inline subvol_inum inode_inum(struct bch_inode_info *inode)
+{
+ return (subvol_inum) {
+ .subvol = inode->ei_subvol,
+ .inum = inode->ei_inode.bi_inum,
+ };
+}
+
/*
* Set if we've gotten a btree error for this inode, and thus the vfs inode and
* btree inode may be inconsistent:
*/
#define EI_INODE_ERROR 0
+/*
+ * Set in the inode is in a snapshot subvolume - we don't do quota accounting in
+ * those:
+ */
+#define EI_INODE_SNAPSHOT 1
+
#define to_bch_ei(_inode) \
container_of_or_null(_inode, struct bch_inode_info, v)
if ((_locks) & INODE_LOCK) \
down_write_nested(&a[i]->v.i_rwsem, i); \
if ((_locks) & INODE_PAGECACHE_BLOCK) \
- bch2_pagecache_block_get(&a[i]->ei_pagecache_lock);\
+ bch2_pagecache_block_get(a[i]);\
if ((_locks) & INODE_UPDATE_LOCK) \
mutex_lock_nested(&a[i]->ei_update_lock, i);\
} \
if ((_locks) & INODE_LOCK) \
up_write(&a[i]->v.i_rwsem); \
if ((_locks) & INODE_PAGECACHE_BLOCK) \
- bch2_pagecache_block_put(&a[i]->ei_pagecache_lock);\
+ bch2_pagecache_block_put(a[i]);\
if ((_locks) & INODE_UPDATE_LOCK) \
mutex_unlock(&a[i]->ei_update_lock); \
} \
#ifndef NO_BCACHEFS_FS
+struct bch_inode_info *
+__bch2_create(struct mnt_idmap *, struct bch_inode_info *,
+ struct dentry *, umode_t, dev_t, subvol_inum, unsigned);
+
int bch2_fs_quota_transfer(struct bch_fs *,
struct bch_inode_info *,
struct bch_qid,
KEY_TYPE_QUOTA_PREALLOC);
}
-struct inode *bch2_vfs_inode_get(struct bch_fs *, u64);
+struct inode *bch2_vfs_inode_get(struct bch_fs *, subvol_inum);
/* returns 0 if we want to do the update, or error is passed up */
-typedef int (*inode_set_fn)(struct bch_inode_info *,
+typedef int (*inode_set_fn)(struct btree_trans *,
+ struct bch_inode_info *,
struct bch_inode_unpacked *, void *);
-void bch2_inode_update_after_write(struct bch_fs *,
+void bch2_inode_update_after_write(struct btree_trans *,
struct bch_inode_info *,
struct bch_inode_unpacked *,
unsigned);
int __must_check bch2_write_inode(struct bch_fs *, struct bch_inode_info *,
inode_set_fn, void *, unsigned);
-int bch2_setattr_nonsize(struct user_namespace *,
+int bch2_setattr_nonsize(struct mnt_idmap *,
struct bch_inode_info *,
struct iattr *);
+int __bch2_unlink(struct inode *, struct dentry *, bool);
+
+void bch2_evict_subvolume_inodes(struct bch_fs *, snapshot_id_list *);
void bch2_vfs_exit(void);
int bch2_vfs_init(void);
#else
+#define bch2_inode_update_after_write(_trans, _inode, _inode_u, _fields) ({ do {} while (0); })
+
+static inline void bch2_evict_subvolume_inodes(struct bch_fs *c,
+ snapshot_id_list *s) {}
static inline void bch2_vfs_exit(void) {}
static inline int bch2_vfs_init(void) { return 0; }
projects / bcachefs-tools-debian / blobdiff