ext4_jbd2.h (3d2b158262826e8b75bbbfb7b97010838dd92ac7) ext4_jbd2.h (18aadd47f88464928b5ce57791c2e8f9f2aaece0)
1/*
2 * ext4_jbd2.h
3 *
4 * Written by Stephen C. Tweedie <sct@redhat.com>, 1999
5 *
6 * Copyright 1998--1999 Red Hat corp --- All Rights Reserved
7 *
8 * This file is part of the Linux kernel and is made available under

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99#define EXT4_QUOTA_TRANS_BLOCKS(sb) 0
100#define EXT4_QUOTA_INIT_BLOCKS(sb) 0
101#define EXT4_QUOTA_DEL_BLOCKS(sb) 0
102#endif
103#define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb))
104#define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb))
105#define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb))
106
1/*
2 * ext4_jbd2.h
3 *
4 * Written by Stephen C. Tweedie <sct@redhat.com>, 1999
5 *
6 * Copyright 1998--1999 Red Hat corp --- All Rights Reserved
7 *
8 * This file is part of the Linux kernel and is made available under

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99#define EXT4_QUOTA_TRANS_BLOCKS(sb) 0
100#define EXT4_QUOTA_INIT_BLOCKS(sb) 0
101#define EXT4_QUOTA_DEL_BLOCKS(sb) 0
102#endif
103#define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb))
104#define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb))
105#define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb))
106
107/**
108 * struct ext4_journal_cb_entry - Base structure for callback information.
109 *
110 * This struct is a 'seed' structure for a using with your own callback
111 * structs. If you are using callbacks you must allocate one of these
112 * or another struct of your own definition which has this struct
113 * as it's first element and pass it to ext4_journal_callback_add().
114 */
115struct ext4_journal_cb_entry {
116 /* list information for other callbacks attached to the same handle */
117 struct list_head jce_list;
118
119 /* Function to call with this callback structure */
120 void (*jce_func)(struct super_block *sb,
121 struct ext4_journal_cb_entry *jce, int error);
122
123 /* user data goes here */
124};
125
126/**
127 * ext4_journal_callback_add: add a function to call after transaction commit
128 * @handle: active journal transaction handle to register callback on
129 * @func: callback function to call after the transaction has committed:
130 * @sb: superblock of current filesystem for transaction
131 * @jce: returned journal callback data
132 * @rc: journal state at commit (0 = transaction committed properly)
133 * @jce: journal callback data (internal and function private data struct)
134 *
135 * The registered function will be called in the context of the journal thread
136 * after the transaction for which the handle was created has completed.
137 *
138 * No locks are held when the callback function is called, so it is safe to
139 * call blocking functions from within the callback, but the callback should
140 * not block or run for too long, or the filesystem will be blocked waiting for
141 * the next transaction to commit. No journaling functions can be used, or
142 * there is a risk of deadlock.
143 *
144 * There is no guaranteed calling order of multiple registered callbacks on
145 * the same transaction.
146 */
147static inline void ext4_journal_callback_add(handle_t *handle,
148 void (*func)(struct super_block *sb,
149 struct ext4_journal_cb_entry *jce,
150 int rc),
151 struct ext4_journal_cb_entry *jce)
152{
153 struct ext4_sb_info *sbi =
154 EXT4_SB(handle->h_transaction->t_journal->j_private);
155
156 /* Add the jce to transaction's private list */
157 jce->jce_func = func;
158 spin_lock(&sbi->s_md_lock);
159 list_add_tail(&jce->jce_list, &handle->h_transaction->t_private_list);
160 spin_unlock(&sbi->s_md_lock);
161}
162
163/**
164 * ext4_journal_callback_del: delete a registered callback
165 * @handle: active journal transaction handle on which callback was registered
166 * @jce: registered journal callback entry to unregister
167 */
168static inline void ext4_journal_callback_del(handle_t *handle,
169 struct ext4_journal_cb_entry *jce)
170{
171 struct ext4_sb_info *sbi =
172 EXT4_SB(handle->h_transaction->t_journal->j_private);
173
174 spin_lock(&sbi->s_md_lock);
175 list_del_init(&jce->jce_list);
176 spin_unlock(&sbi->s_md_lock);
177}
178
107int
108ext4_mark_iloc_dirty(handle_t *handle,
109 struct inode *inode,
110 struct ext4_iloc *iloc);
111
112/*
113 * On success, We end up with an outstanding reference count against
114 * iloc->bh. This _must_ be cleaned up later.

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180ext4_mark_iloc_dirty(handle_t *handle,
181 struct inode *inode,
182 struct ext4_iloc *iloc);
183
184/*
185 * On success, We end up with an outstanding reference count against
186 * iloc->bh. This _must_ be cleaned up later.

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