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         struct deferred_update  *ei_inode_update;
  18         u64                     ei_journal_seq;
  19         u64                     ei_quota_reserved;
  20         unsigned long           ei_last_dirtied;
  21
  22         struct mutex            ei_quota_lock;
  23         struct bch_qid          ei_qid;
  24
  25         struct bch_hash_info    ei_str_hash;
  26
  27         /* copy of inode in btree: */
  28         struct bch_inode_unpacked ei_inode;
  29 };
  30
  31 #define to_bch_ei(_inode)                                       \
  32         container_of_or_null(_inode, struct bch_inode_info, v)
  33
  34 static inline int ptrcmp(void *l, void *r)
  35 {
  36         return cmp_int(l, r);
  37 }
  38
  39 enum bch_inode_lock_op {
  40         INODE_LOCK              = (1U << 0),
  41         INODE_UPDATE_LOCK       = (1U << 1),
  42 };
  43
  44 #define bch2_lock_inodes(_locks, ...)                                   \
  45 do {                                                                    \
  46         struct bch_inode_info *a[] = { NULL, __VA_ARGS__ };             \
  47         unsigned i;                                                     \
  48                                                                         \
  49         bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp);                  \
  50                                                                         \
  51         for (i = 1; i < ARRAY_SIZE(a); i++)                             \
  52                 if (a[i] != a[i - 1]) {                                 \
  53                         if (_locks & INODE_LOCK)                        \
  54                                 down_write_nested(&a[i]->v.i_rwsem, i); \
  55                         if (_locks & INODE_UPDATE_LOCK)                 \
  56                                 mutex_lock_nested(&a[i]->ei_update_lock, i);\
  57                 }                                                       \
  58 } while (0)
  59
  60 #define bch2_unlock_inodes(_locks, ...)                                 \
  61 do {                                                                    \
  62         struct bch_inode_info *a[] = { NULL, __VA_ARGS__ };             \
  63         unsigned i;                                                     \
  64                                                                         \
  65         bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp);                  \
  66                                                                         \
  67         for (i = 1; i < ARRAY_SIZE(a); i++)                             \
  68                 if (a[i] != a[i - 1]) {                                 \
  69                         if (_locks & INODE_LOCK)                        \
  70                                 up_write(&a[i]->v.i_rwsem);             \
  71                         if (_locks & INODE_UPDATE_LOCK)                 \
  72                                 mutex_unlock(&a[i]->ei_update_lock);    \
  73                 }                                                       \
  74 } while (0)
  75
  76 static inline struct bch_inode_info *file_bch_inode(struct file *file)
  77 {
  78         return to_bch_ei(file_inode(file));
  79 }
  80
  81 static inline u8 mode_to_type(umode_t mode)
  82 {
  83         return (mode >> 12) & 15;
  84 }
  85
  86 static inline unsigned nlink_bias(umode_t mode)
  87 {
  88         return S_ISDIR(mode) ? 2 : 1;
  89 }
  90
  91 static inline bool inode_attr_changing(struct bch_inode_info *dir,
  92                                 struct bch_inode_info *inode,
  93                                 enum inode_opt_id id)
  94 {
  95         return !(inode->ei_inode.bi_fields_set & (1 << id)) &&
  96                 bch2_inode_opt_get(&dir->ei_inode, id) !=
  97                 bch2_inode_opt_get(&inode->ei_inode, id);
  98 }
  99
 100 static inline bool inode_attrs_changing(struct bch_inode_info *dir,
 101                                  struct bch_inode_info *inode)
 102 {
 103         unsigned id;
 104
 105         for (id = 0; id < Inode_opt_nr; id++)
 106                 if (inode_attr_changing(dir, inode, id))
 107                         return true;
 108
 109         return false;
 110 }
 111
 112 struct bch_inode_unpacked;
 113
 114 #ifndef NO_BCACHEFS_FS
 115
 116 int bch2_fs_quota_transfer(struct bch_fs *,
 117                            struct bch_inode_info *,
 118                            struct bch_qid,
 119                            unsigned,
 120                            enum quota_acct_mode);
 121
 122 static inline int bch2_set_projid(struct bch_fs *c,
 123                                   struct bch_inode_info *inode,
 124                                   u32 projid)
 125 {
 126         struct bch_qid qid = inode->ei_qid;
 127
 128         qid.q[QTYP_PRJ] = projid;
 129
 130         return bch2_fs_quota_transfer(c, inode, qid,
 131                                       1 << QTYP_PRJ,
 132                                       KEY_TYPE_QUOTA_PREALLOC);
 133 }
 134
 135 struct inode *bch2_vfs_inode_get(struct bch_fs *, u64);
 136
 137 /* returns 0 if we want to do the update, or error is passed up */
 138 typedef int (*inode_set_fn)(struct bch_inode_info *,
 139                             struct bch_inode_unpacked *, void *);
 140
 141 void bch2_inode_update_after_write(struct bch_fs *,
 142                                    struct bch_inode_info *,
 143                                    struct bch_inode_unpacked *,
 144                                    unsigned);
 145 int __must_check bch2_write_inode_trans(struct btree_trans *,
 146                                 struct bch_inode_info *,
 147                                 struct bch_inode_unpacked *,
 148                                 inode_set_fn, void *);
 149 int __must_check bch2_write_inode(struct bch_fs *, struct bch_inode_info *,
 150                                   inode_set_fn, void *, unsigned);
 151
 152 int bch2_reinherit_attrs_fn(struct bch_inode_info *,
 153                             struct bch_inode_unpacked *,
 154                             void *);
 155
 156 void bch2_vfs_exit(void);
 157 int bch2_vfs_init(void);
 158
 159 #else
 160
 161 static inline void bch2_vfs_exit(void) {}
 162 static inline int bch2_vfs_init(void) { return 0; }
 163
 164 #endif /* NO_BCACHEFS_FS */
 165
 166 #endif /* _BCACHEFS_FS_H */