+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_FS_H
#define _BCACHEFS_FS_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;
+ 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;
+
struct mutex ei_quota_lock;
struct bch_qid ei_qid;
- struct bch_hash_info ei_str_hash;
+ u32 ei_subvol;
/* copy of inode in btree: */
struct bch_inode_unpacked ei_inode;
};
+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 struct bch_inode_info *file_bch_inode(struct file *file)
+static inline int ptrcmp(void *l, void *r)
{
- return to_bch_ei(file_inode(file));
+ return cmp_int(l, r);
}
-static inline u8 mode_to_type(umode_t mode)
+enum bch_inode_lock_op {
+ INODE_LOCK = (1U << 0),
+ INODE_PAGECACHE_BLOCK = (1U << 1),
+ INODE_UPDATE_LOCK = (1U << 2),
+};
+
+#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_LOCK) \
+ down_write_nested(&a[i]->v.i_rwsem, i); \
+ if ((_locks) & INODE_PAGECACHE_BLOCK) \
+ bch2_pagecache_block_get(&a[i]->ei_pagecache_lock);\
+ 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_LOCK) \
+ up_write(&a[i]->v.i_rwsem); \
+ if ((_locks) & INODE_PAGECACHE_BLOCK) \
+ bch2_pagecache_block_put(&a[i]->ei_pagecache_lock);\
+ 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 (mode >> 12) & 15;
+ return to_bch_ei(file_inode(file));
}
-static inline unsigned nlink_bias(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 S_ISDIR(mode) ? 2 : 1;
+ 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 u64 bch2_current_time(struct bch_fs *c)
+static inline bool inode_attrs_changing(struct bch_inode_info *dir,
+ struct bch_inode_info *inode)
{
- return timespec_to_bch2_time(c, current_kernel_time64());
+ 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 user_namespace *, 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 *,
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_trans(struct btree_trans *,
- struct bch_inode_info *,
- struct bch_inode_unpacked *,
- inode_set_fn, void *);
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 *,
+ struct bch_inode_info *,
+ struct iattr *);
+int __bch2_unlink(struct inode *, struct dentry *, bool);
+
+void bch2_evict_subvolume_inodes(struct bch_fs *, struct snapshot_id_list *);
+
void bch2_vfs_exit(void);
int bch2_vfs_init(void);
#else
+static inline void bch2_evict_subvolume_inodes(struct bch_fs *c,
+ struct 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