~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/fs/ocfs2/refcounttree.h

Version: ~ [ linux-5.11-rc3 ] ~ [ linux-5.10.7 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.89 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.167 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.215 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.251 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.251 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* SPDX-License-Identifier: GPL-2.0-only */
  2 /* -*- mode: c; c-basic-offset: 8; -*-
  3  * vim: noexpandtab sw=8 ts=8 sts=0:
  4  *
  5  * refcounttree.h
  6  *
  7  * Copyright (C) 2009 Oracle.  All rights reserved.
  8  */
  9 #ifndef OCFS2_REFCOUNTTREE_H
 10 #define OCFS2_REFCOUNTTREE_H
 11 
 12 struct ocfs2_refcount_tree {
 13         struct rb_node rf_node;
 14         u64 rf_blkno;
 15         u32 rf_generation;
 16         struct kref rf_getcnt;
 17         struct rw_semaphore rf_sem;
 18         struct ocfs2_lock_res rf_lockres;
 19         int rf_removed;
 20 
 21         /* the following 4 fields are used by caching_info. */
 22         spinlock_t rf_lock;
 23         struct ocfs2_caching_info rf_ci;
 24         struct mutex rf_io_mutex;
 25         struct super_block *rf_sb;
 26 };
 27 
 28 void ocfs2_purge_refcount_trees(struct ocfs2_super *osb);
 29 int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw,
 30                              struct ocfs2_refcount_tree **tree,
 31                              struct buffer_head **ref_bh);
 32 void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb,
 33                                 struct ocfs2_refcount_tree *tree,
 34                                 int rw);
 35 
 36 int ocfs2_decrease_refcount(struct inode *inode,
 37                             handle_t *handle, u32 cpos, u32 len,
 38                             struct ocfs2_alloc_context *meta_ac,
 39                             struct ocfs2_cached_dealloc_ctxt *dealloc,
 40                             int delete);
 41 int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
 42                                           u64 refcount_loc,
 43                                           u64 phys_blkno,
 44                                           u32 clusters,
 45                                           int *credits,
 46                                           int *ref_blocks);
 47 int ocfs2_refcount_cow(struct inode *inode,
 48                        struct buffer_head *di_bh,
 49                        u32 cpos, u32 write_len, u32 max_cpos);
 50 
 51 typedef int (ocfs2_post_refcount_func)(struct inode *inode,
 52                                        handle_t *handle,
 53                                        void *para);
 54 /*
 55  * Some refcount caller need to do more work after we modify the data b-tree
 56  * during refcount operation(including CoW and add refcount flag), and make the
 57  * transaction complete. So it must give us this structure so that we can do it
 58  * within our transaction.
 59  *
 60  */
 61 struct ocfs2_post_refcount {
 62         int credits;                    /* credits it need for journal. */
 63         ocfs2_post_refcount_func *func; /* real function. */
 64         void *para;
 65 };
 66 
 67 int ocfs2_refcounted_xattr_delete_need(struct inode *inode,
 68                                        struct ocfs2_caching_info *ref_ci,
 69                                        struct buffer_head *ref_root_bh,
 70                                        struct ocfs2_xattr_value_root *xv,
 71                                        int *meta_add, int *credits);
 72 int ocfs2_refcount_cow_xattr(struct inode *inode,
 73                              struct ocfs2_dinode *di,
 74                              struct ocfs2_xattr_value_buf *vb,
 75                              struct ocfs2_refcount_tree *ref_tree,
 76                              struct buffer_head *ref_root_bh,
 77                              u32 cpos, u32 write_len,
 78                              struct ocfs2_post_refcount *post);
 79 int ocfs2_duplicate_clusters_by_page(handle_t *handle,
 80                                      struct inode *inode,
 81                                      u32 cpos, u32 old_cluster,
 82                                      u32 new_cluster, u32 new_len);
 83 int ocfs2_duplicate_clusters_by_jbd(handle_t *handle,
 84                                     struct inode *inode,
 85                                     u32 cpos, u32 old_cluster,
 86                                     u32 new_cluster, u32 new_len);
 87 int ocfs2_cow_sync_writeback(struct super_block *sb,
 88                              struct inode *inode,
 89                              u32 cpos, u32 num_clusters);
 90 int ocfs2_add_refcount_flag(struct inode *inode,
 91                             struct ocfs2_extent_tree *data_et,
 92                             struct ocfs2_caching_info *ref_ci,
 93                             struct buffer_head *ref_root_bh,
 94                             u32 cpos, u32 p_cluster, u32 num_clusters,
 95                             struct ocfs2_cached_dealloc_ctxt *dealloc,
 96                             struct ocfs2_post_refcount *post);
 97 int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh);
 98 int ocfs2_try_remove_refcount_tree(struct inode *inode,
 99                                    struct buffer_head *di_bh);
100 int ocfs2_increase_refcount(handle_t *handle,
101                             struct ocfs2_caching_info *ci,
102                             struct buffer_head *ref_root_bh,
103                             u64 cpos, u32 len,
104                             struct ocfs2_alloc_context *meta_ac,
105                             struct ocfs2_cached_dealloc_ctxt *dealloc);
106 int ocfs2_reflink_ioctl(struct inode *inode,
107                         const char __user *oldname,
108                         const char __user *newname,
109                         bool preserve);
110 loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
111                                   struct buffer_head *s_bh,
112                                   loff_t pos_in,
113                                   struct inode *t_inode,
114                                   struct buffer_head *t_bh,
115                                   loff_t pos_out,
116                                   loff_t len);
117 int ocfs2_reflink_inodes_lock(struct inode *s_inode,
118                               struct buffer_head **bh1,
119                               struct inode *t_inode,
120                               struct buffer_head **bh2);
121 void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
122                                  struct buffer_head *s_bh,
123                                  struct inode *t_inode,
124                                  struct buffer_head *t_bh);
125 int ocfs2_reflink_update_dest(struct inode *dest,
126                               struct buffer_head *d_bh,
127                               loff_t newlen);
128 
129 #endif /* OCFS2_REFCOUNTTREE_H */
130 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp