+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_FS_H
#define _BCACHEFS_FS_H
+#include "inode.h"
#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>
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;
+ two_state_lock_t ei_pagecache_lock;
+
+ struct mutex ei_quota_lock;
struct bch_qid ei_qid;
- struct bch_hash_info ei_str_hash;
+ 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)
+static inline int ptrcmp(void *l, void *r)
+{
+ return cmp_int(l, r);
+}
+
+enum bch_inode_lock_op {
+ INODE_PAGECACHE_BLOCK = (1U << 0),
+ INODE_UPDATE_LOCK = (1U << 1),
+};
+
+#define bch2_lock_inodes(_locks, ...) \
+do { \
+ struct bch_inode_info *a[] = { NULL, __VA_ARGS__ }; \
+ unsigned i; \
+ \
+ bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp); \
+ \
+ for (i = 1; i < ARRAY_SIZE(a); i++) \
+ if (a[i] != a[i - 1]) { \
+ if ((_locks) & INODE_PAGECACHE_BLOCK) \
+ bch2_pagecache_block_get(a[i]);\
+ if ((_locks) & INODE_UPDATE_LOCK) \
+ mutex_lock_nested(&a[i]->ei_update_lock, i);\
+ } \
+} while (0)
+
+#define bch2_unlock_inodes(_locks, ...) \
+do { \
+ struct bch_inode_info *a[] = { NULL, __VA_ARGS__ }; \
+ unsigned i; \
+ \
+ bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp); \
+ \
+ for (i = 1; i < ARRAY_SIZE(a); i++) \
+ if (a[i] != a[i - 1]) { \
+ if ((_locks) & INODE_PAGECACHE_BLOCK) \
+ bch2_pagecache_block_put(a[i]);\
+ if ((_locks) & INODE_UPDATE_LOCK) \
+ mutex_unlock(&a[i]->ei_update_lock); \
+ } \
+} while (0)
+
static inline struct bch_inode_info *file_bch_inode(struct file *file)
{
return to_bch_ei(file_inode(file));
}
-static inline u8 mode_to_type(umode_t mode)
+static inline bool inode_attr_changing(struct bch_inode_info *dir,
+ struct bch_inode_info *inode,
+ enum inode_opt_id id)
{
- return (mode >> 12) & 15;
+ return !(inode->ei_inode.bi_fields_set & (1 << id)) &&
+ bch2_inode_opt_get(&dir->ei_inode, id) !=
+ bch2_inode_opt_get(&inode->ei_inode, id);
}
-static inline unsigned nlink_bias(umode_t mode)
+static inline bool inode_attrs_changing(struct bch_inode_info *dir,
+ struct bch_inode_info *inode)
{
- return S_ISDIR(mode) ? 2 : 1;
+ unsigned id;
+
+ for (id = 0; id < Inode_opt_nr; id++)
+ if (inode_attr_changing(dir, inode, id))
+ return true;
+
+ return false;
}
struct bch_inode_unpacked;
#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,
+ unsigned,
+ enum quota_acct_mode);
+
+static inline int bch2_set_projid(struct bch_fs *c,
+ struct bch_inode_info *inode,
+ u32 projid)
+{
+ struct bch_qid qid = inode->ei_qid;
+
+ qid.q[QTYP_PRJ] = projid;
+
+ return bch2_fs_quota_transfer(c, inode, qid,
+ 1 << QTYP_PRJ,
+ KEY_TYPE_QUOTA_PREALLOC);
+}
+
+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 *);
-int __must_check __bch2_write_inode(struct bch_fs *, struct bch_inode_info *,
- inode_set_fn, void *);
-int __must_check bch2_write_inode(struct bch_fs *,
- struct bch_inode_info *);
+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 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