git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/fs.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_FS_H
   3 #define _BCACHEFS_FS_H
   4
   5 #include "inode.h"
   6 #include "opts.h"
   7 #include "str_hash.h"
   8 #include "quota_types.h"
   9
  10 #include <linux/seqlock.h>
  11 #include <linux/stat.h>
  12
  13 struct bch_inode_info {
  14         struct inode            v;
  15
  16         struct mutex            ei_update_lock;
  17         u64                     ei_journal_seq;
  18         u64                     ei_quota_reserved;
  19         unsigned long           ei_last_dirtied;
  20
  21         struct mutex            ei_quota_lock;
  22         struct bch_qid          ei_qid;
  23
  24         struct bch_hash_info    ei_str_hash;
  25
  26         /* copy of inode in btree: */
  27         struct bch_inode_unpacked ei_inode;
  28 };
  29
  30 #define to_bch_ei(_inode)                                       \
  31         container_of_or_null(_inode, struct bch_inode_info, v)
  32
  33 static inline int ptrcmp(void *l, void *r)
  34 {
  35         return cmp_int(l, r);
  36 }
  37
  38 enum bch_inode_lock_op {
  39         INODE_LOCK              = (1U << 0),
  40         INODE_UPDATE_LOCK       = (1U << 1),
  41 };
  42
  43 #define bch2_lock_inodes(_locks, ...)                                   \
  44 do {                                                                    \
  45         struct bch_inode_info *a[] = { NULL, __VA_ARGS__ };             \
  46         unsigned i;                                                     \
  47                                                                         \
  48         bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp);                  \
  49                                                                         \
  50         for (i = 1; i < ARRAY_SIZE(a); i++)                             \
  51                 if (a[i] != a[i - 1]) {                                 \
  52                         if (_locks & INODE_LOCK)                        \
  53                                 down_write_nested(&a[i]->v.i_rwsem, i); \
  54                         if (_locks & INODE_UPDATE_LOCK)                 \
  55                                 mutex_lock_nested(&a[i]->ei_update_lock, i);\
  56                 }                                                       \
  57 } while (0)
  58
  59 #define bch2_unlock_inodes(_locks, ...)                                 \
  60 do {                                                                    \
  61         struct bch_inode_info *a[] = { NULL, __VA_ARGS__ };             \
  62         unsigned i;                                                     \
  63                                                                         \
  64         bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp);                  \
  65                                                                         \
  66         for (i = 1; i < ARRAY_SIZE(a); i++)                             \
  67                 if (a[i] != a[i - 1]) {                                 \
  68                         if (_locks & INODE_LOCK)                        \
  69                                 up_write(&a[i]->v.i_rwsem);             \
  70                         if (_locks & INODE_UPDATE_LOCK)                 \
  71                                 mutex_unlock(&a[i]->ei_update_lock);    \
  72                 }                                                       \
  73 } while (0)
  74
  75 static inline struct bch_inode_info *file_bch_inode(struct file *file)
  76 {
  77         return to_bch_ei(file_inode(file));
  78 }
  79
  80 static inline u8 mode_to_type(umode_t mode)
  81 {
  82         return (mode >> 12) & 15;
  83 }
  84
  85 static inline bool inode_attr_changing(struct bch_inode_info *dir,
  86                                 struct bch_inode_info *inode,
  87                                 enum inode_opt_id id)
  88 {
  89         return !(inode->ei_inode.bi_fields_set & (1 << id)) &&
  90                 bch2_inode_opt_get(&dir->ei_inode, id) !=
  91                 bch2_inode_opt_get(&inode->ei_inode, id);
  92 }
  93
  94 static inline bool inode_attrs_changing(struct bch_inode_info *dir,
  95                                  struct bch_inode_info *inode)
  96 {
  97         unsigned id;
  98
  99         for (id = 0; id < Inode_opt_nr; id++)
 100                 if (inode_attr_changing(dir, inode, id))
 101                         return true;
 102
 103         return false;
 104 }
 105
 106 struct bch_inode_unpacked;
 107
 108 #ifndef NO_BCACHEFS_FS
 109
 110 int bch2_fs_quota_transfer(struct bch_fs *,
 111                            struct bch_inode_info *,
 112                            struct bch_qid,
 113                            unsigned,
 114                            enum quota_acct_mode);
 115
 116 static inline int bch2_set_projid(struct bch_fs *c,
 117                                   struct bch_inode_info *inode,
 118                                   u32 projid)
 119 {
 120         struct bch_qid qid = inode->ei_qid;
 121
 122         qid.q[QTYP_PRJ] = projid;
 123
 124         return bch2_fs_quota_transfer(c, inode, qid,
 125                                       1 << QTYP_PRJ,
 126                                       KEY_TYPE_QUOTA_PREALLOC);
 127 }
 128
 129 struct inode *bch2_vfs_inode_get(struct bch_fs *, u64);
 130
 131 /* returns 0 if we want to do the update, or error is passed up */
 132 typedef int (*inode_set_fn)(struct bch_inode_info *,
 133                             struct bch_inode_unpacked *, void *);
 134
 135 void bch2_inode_update_after_write(struct bch_fs *,
 136                                    struct bch_inode_info *,
 137                                    struct bch_inode_unpacked *,
 138                                    unsigned);
 139 int __must_check bch2_write_inode_trans(struct btree_trans *,
 140                                 struct bch_inode_info *,
 141                                 struct bch_inode_unpacked *,
 142                                 inode_set_fn, void *);
 143 int __must_check bch2_write_inode(struct bch_fs *, struct bch_inode_info *,
 144                                   inode_set_fn, void *, unsigned);
 145
 146 int bch2_reinherit_attrs_fn(struct bch_inode_info *,
 147                             struct bch_inode_unpacked *,
 148                             void *);
 149
 150 void bch2_vfs_exit(void);
 151 int bch2_vfs_init(void);
 152
 153 #else
 154
 155 static inline void bch2_vfs_exit(void) {}
 156 static inline int bch2_vfs_init(void) { return 0; }
 157
 158 #endif /* NO_BCACHEFS_FS */
 159
 160 #endif /* _BCACHEFS_FS_H */