Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * ext4_jbd2.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Written by Stephen C. Tweedie <sct@redhat.com>, 1999
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Copyright 1998--1999 Red Hat corp --- All Rights Reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Ext4-specific journaling extensions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #ifndef _EXT4_JBD2_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #define _EXT4_JBD2_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/jbd2.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "ext4.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define EXT4_JOURNAL(inode)	(EXT4_SB((inode)->i_sb)->s_journal)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) /* Define the number of blocks we need to account to a transaction to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * modify one block of data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * We may have to touch one inode, one bitmap buffer, up to three
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * indirection blocks, the group and superblock summaries, and the data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * block to complete the transaction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * For extents-enabled fs we may have to allocate and modify up to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * 5 levels of tree, data block (for each of these we need bitmap + group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * summaries), root which is stored in the inode, sb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define EXT4_SINGLEDATA_TRANS_BLOCKS(sb)				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	(ext4_has_feature_extents(sb) ? 20U : 8U)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) /* Extended attribute operations touch at most two data buffers,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37)  * two bitmap buffers, and two group summaries, in addition to the inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38)  * and the superblock, which are already accounted for. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #define EXT4_XATTR_TRANS_BLOCKS		6U
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) /* Define the minimum size for a transaction which modifies data.  This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * needs to take into account the fact that we may end up modifying two
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  * quota files too (one for the group, one for the user quota).  The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  * superblock only gets updated once, of course, so don't bother
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  * counting that again for the quota updates. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #define EXT4_DATA_TRANS_BLOCKS(sb)	(EXT4_SINGLEDATA_TRANS_BLOCKS(sb) + \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 					 EXT4_XATTR_TRANS_BLOCKS - 2 + \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 					 EXT4_MAXQUOTAS_TRANS_BLOCKS(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)  * Define the number of metadata blocks we need to account to modify data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  * This include super block, inode block, quota blocks and xattr blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) #define EXT4_META_TRANS_BLOCKS(sb)	(EXT4_XATTR_TRANS_BLOCKS + \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 					EXT4_MAXQUOTAS_TRANS_BLOCKS(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) /* Define an arbitrary limit for the amount of data we will anticipate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61)  * writing to any given transaction.  For unbounded transactions such as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62)  * write(2) and truncate(2) we can write more than this, but we always
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)  * start off at the maximum transaction size and grow the transaction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  * optimistically as we go. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) #define EXT4_MAX_TRANS_DATA		64U
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) /* We break up a large truncate or write transaction once the handle's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69)  * buffer credits gets this low, we need either to extend the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70)  * transaction or to start a new one.  Reserve enough space here for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71)  * inode, bitmap, superblock, group and indirection updates for at least
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72)  * one block, plus two quota updates.  Quota allocations are not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73)  * needed. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) #define EXT4_RESERVE_TRANS_BLOCKS	12U
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78)  * Number of credits needed if we need to insert an entry into a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79)  * directory.  For each new index block, we need 4 blocks (old index
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80)  * block, new index block, bitmap block, bg summary).  For normal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81)  * htree directories there are 2 levels; if the largedir feature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82)  * enabled it's 3 levels.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) #define EXT4_INDEX_EXTRA_TRANS_BLOCKS	12U
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) #ifdef CONFIG_QUOTA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) /* Amount of blocks needed for quota update - we know that the structure was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88)  * allocated so we need to update only data block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) #define EXT4_QUOTA_TRANS_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		ext4_has_feature_quota(sb)) ? 1 : 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) /* Amount of blocks needed for quota insert/delete - we do some block writes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  * but inode, sb and group updates are done only once */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) #define EXT4_QUOTA_INIT_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		ext4_has_feature_quota(sb)) ?\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		(DQUOT_INIT_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		 +3+DQUOT_INIT_REWRITE) : 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) #define EXT4_QUOTA_DEL_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		ext4_has_feature_quota(sb)) ?\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		(DQUOT_DEL_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		 +3+DQUOT_DEL_REWRITE) : 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #define EXT4_QUOTA_TRANS_BLOCKS(sb) 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #define EXT4_QUOTA_INIT_BLOCKS(sb) 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #define EXT4_QUOTA_DEL_BLOCKS(sb) 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)  * Ext4 handle operation types -- for logging purposes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #define EXT4_HT_MISC             0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define EXT4_HT_INODE            1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define EXT4_HT_WRITE_PAGE       2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #define EXT4_HT_MAP_BLOCKS       3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #define EXT4_HT_DIR              4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #define EXT4_HT_TRUNCATE         5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define EXT4_HT_QUOTA            6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #define EXT4_HT_RESIZE           7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #define EXT4_HT_MIGRATE          8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) #define EXT4_HT_MOVE_EXTENTS     9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #define EXT4_HT_XATTR           10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #define EXT4_HT_EXT_CONVERT     11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #define EXT4_HT_MAX             12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)  *   struct ext4_journal_cb_entry - Base structure for callback information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)  *   This struct is a 'seed' structure for a using with your own callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)  *   structs. If you are using callbacks you must allocate one of these
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)  *   or another struct of your own definition which has this struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)  *   as it's first element and pass it to ext4_journal_callback_add().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct ext4_journal_cb_entry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	/* list information for other callbacks attached to the same handle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct list_head jce_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	/*  Function to call with this callback structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	void (*jce_func)(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			 struct ext4_journal_cb_entry *jce, int error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	/* user data goes here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)  * ext4_journal_callback_add: add a function to call after transaction commit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)  * @handle: active journal transaction handle to register callback on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)  * @func: callback function to call after the transaction has committed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)  *        @sb: superblock of current filesystem for transaction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)  *        @jce: returned journal callback data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)  *        @rc: journal state at commit (0 = transaction committed properly)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)  * @jce: journal callback data (internal and function private data struct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)  * The registered function will be called in the context of the journal thread
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)  * after the transaction for which the handle was created has completed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)  * No locks are held when the callback function is called, so it is safe to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)  * call blocking functions from within the callback, but the callback should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)  * not block or run for too long, or the filesystem will be blocked waiting for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)  * the next transaction to commit. No journaling functions can be used, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)  * there is a risk of deadlock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)  * There is no guaranteed calling order of multiple registered callbacks on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)  * the same transaction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static inline void _ext4_journal_callback_add(handle_t *handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			struct ext4_journal_cb_entry *jce)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	/* Add the jce to transaction's private list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	list_add_tail(&jce->jce_list, &handle->h_transaction->t_private_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static inline void ext4_journal_callback_add(handle_t *handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			void (*func)(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 				     struct ext4_journal_cb_entry *jce,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 				     int rc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 			struct ext4_journal_cb_entry *jce)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	struct ext4_sb_info *sbi =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 			EXT4_SB(handle->h_transaction->t_journal->j_private);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	/* Add the jce to transaction's private list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	jce->jce_func = func;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	spin_lock(&sbi->s_md_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	_ext4_journal_callback_add(handle, jce);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	spin_unlock(&sbi->s_md_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)  * ext4_journal_callback_del: delete a registered callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)  * @handle: active journal transaction handle on which callback was registered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)  * @jce: registered journal callback entry to unregister
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)  * Return true if object was successfully removed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) static inline bool ext4_journal_callback_try_del(handle_t *handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 					     struct ext4_journal_cb_entry *jce)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	bool deleted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct ext4_sb_info *sbi =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 			EXT4_SB(handle->h_transaction->t_journal->j_private);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	spin_lock(&sbi->s_md_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	deleted = !list_empty(&jce->jce_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	list_del_init(&jce->jce_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	spin_unlock(&sbi->s_md_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	return deleted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) ext4_mark_iloc_dirty(handle_t *handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		     struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		     struct ext4_iloc *iloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)  * On success, We end up with an outstanding reference count against
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)  * iloc->bh.  This _must_ be cleaned up later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) int ext4_reserve_inode_write(handle_t *handle, struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 			struct ext4_iloc *iloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) #define ext4_mark_inode_dirty(__h, __i)					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		__ext4_mark_inode_dirty((__h), (__i), __func__, __LINE__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) int __ext4_mark_inode_dirty(handle_t *handle, struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 				const char *func, unsigned int line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) int ext4_expand_extra_isize(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 			    unsigned int new_extra_isize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			    struct ext4_iloc *iloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)  * Wrapper functions with which ext4 calls into JBD.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) int __ext4_journal_get_write_access(const char *where, unsigned int line,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 				    handle_t *handle, struct buffer_head *bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) int __ext4_forget(const char *where, unsigned int line, handle_t *handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		  int is_metadata, struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		  struct buffer_head *bh, ext4_fsblk_t blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) int __ext4_journal_get_create_access(const char *where, unsigned int line,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 				handle_t *handle, struct buffer_head *bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 				 handle_t *handle, struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 				 struct buffer_head *bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) int __ext4_handle_dirty_super(const char *where, unsigned int line,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 			      handle_t *handle, struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) #define ext4_journal_get_write_access(handle, bh) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	__ext4_journal_get_write_access(__func__, __LINE__, (handle), (bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) #define ext4_forget(handle, is_metadata, inode, bh, block_nr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	__ext4_forget(__func__, __LINE__, (handle), (is_metadata), (inode), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		      (bh), (block_nr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) #define ext4_journal_get_create_access(handle, bh) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	__ext4_journal_get_create_access(__func__, __LINE__, (handle), (bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) #define ext4_handle_dirty_metadata(handle, inode, bh) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	__ext4_handle_dirty_metadata(__func__, __LINE__, (handle), (inode), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 				     (bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) #define ext4_handle_dirty_super(handle, sb) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	__ext4_handle_dirty_super(__func__, __LINE__, (handle), (sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 				  int type, int blocks, int rsv_blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 				  int revoke_creds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) #define EXT4_NOJOURNAL_MAX_REF_COUNT ((unsigned long) 4096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) /* Note:  Do not use this for NULL handles.  This is only to determine if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)  * a properly allocated handle is using a journal or not. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static inline int ext4_handle_valid(handle_t *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	if ((unsigned long)handle < EXT4_NOJOURNAL_MAX_REF_COUNT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static inline void ext4_handle_sync(handle_t *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	if (ext4_handle_valid(handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		handle->h_sync = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static inline int ext4_handle_is_aborted(handle_t *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	if (ext4_handle_valid(handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		return is_handle_aborted(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static inline int ext4_free_metadata_revoke_credits(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 						    int blocks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	/* Freeing each metadata block can result in freeing one cluster */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	return blocks * EXT4_SB(sb)->s_cluster_ratio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) static inline int ext4_trans_default_revoke_credits(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	return ext4_free_metadata_revoke_credits(sb, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) #define ext4_journal_start_sb(sb, type, nblocks)			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	__ext4_journal_start_sb((sb), __LINE__, (type), (nblocks), 0,	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 				ext4_trans_default_revoke_credits(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) #define ext4_journal_start(inode, type, nblocks)			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	__ext4_journal_start((inode), __LINE__, (type), (nblocks), 0,	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 			     ext4_trans_default_revoke_credits((inode)->i_sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) #define ext4_journal_start_with_reserve(inode, type, blocks, rsv_blocks)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	__ext4_journal_start((inode), __LINE__, (type), (blocks), (rsv_blocks),\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 			     ext4_trans_default_revoke_credits((inode)->i_sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) #define ext4_journal_start_with_revoke(inode, type, blocks, revoke_creds) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	__ext4_journal_start((inode), __LINE__, (type), (blocks), 0,	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 			     (revoke_creds))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) static inline handle_t *__ext4_journal_start(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 					     unsigned int line, int type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 					     int blocks, int rsv_blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 					     int revoke_creds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	return __ext4_journal_start_sb(inode->i_sb, line, type, blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 				       rsv_blocks, revoke_creds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) #define ext4_journal_stop(handle) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	__ext4_journal_stop(__func__, __LINE__, (handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) #define ext4_journal_start_reserved(handle, type) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	__ext4_journal_start_reserved((handle), __LINE__, (type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 					int type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static inline handle_t *ext4_journal_current_handle(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	return journal_current_handle();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) static inline int ext4_journal_extend(handle_t *handle, int nblocks, int revoke)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	if (ext4_handle_valid(handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		return jbd2_journal_extend(handle, nblocks, revoke);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) static inline int ext4_journal_restart(handle_t *handle, int nblocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 				       int revoke)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	if (ext4_handle_valid(handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 		return jbd2__journal_restart(handle, nblocks, revoke, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) int __ext4_journal_ensure_credits(handle_t *handle, int check_cred,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 				  int extend_cred, int revoke_cred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)  * Ensure @handle has at least @check_creds credits available. If not,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)  * transaction will be extended or restarted to contain at least @extend_cred
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)  * credits. Before restarting transaction @fn is executed to allow for cleanup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)  * before the transaction is restarted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)  * The return value is < 0 in case of error, 0 in case the handle has enough
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)  * credits or transaction extension succeeded, 1 in case transaction had to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)  * restarted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) #define ext4_journal_ensure_credits_fn(handle, check_cred, extend_cred,	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 				       revoke_cred, fn) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) ({									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	__label__ __ensure_end;						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	int err = __ext4_journal_ensure_credits((handle), (check_cred),	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 					(extend_cred), (revoke_cred));	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	if (err <= 0)							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 		goto __ensure_end;					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	err = (fn);							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	if (err < 0)							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 		goto __ensure_end;					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	err = ext4_journal_restart((handle), (extend_cred), (revoke_cred)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	if (err == 0)							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 		err = 1;						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) __ensure_end:								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	err;								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)  * Ensure given handle has at least requested amount of credits available,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)  * possibly restarting transaction if needed. We also make sure the transaction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)  * has space for at least ext4_trans_default_revoke_credits(sb) revoke records
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)  * as freeing one or two blocks is very common pattern and requesting this is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)  * very cheap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) static inline int ext4_journal_ensure_credits(handle_t *handle, int credits,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 					      int revoke_creds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	return ext4_journal_ensure_credits_fn(handle, credits, credits,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 				revoke_creds, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) static inline int ext4_journal_blocks_per_page(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	if (EXT4_JOURNAL(inode) != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 		return jbd2_journal_blocks_per_page(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) static inline int ext4_journal_force_commit(journal_t *journal)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	if (journal)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 		return jbd2_journal_force_commit(journal);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) static inline int ext4_jbd2_inode_add_write(handle_t *handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 		struct inode *inode, loff_t start_byte, loff_t length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	if (ext4_handle_valid(handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 		return jbd2_journal_inode_ranged_write(handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 				EXT4_I(inode)->jinode, start_byte, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) static inline int ext4_jbd2_inode_add_wait(handle_t *handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 		struct inode *inode, loff_t start_byte, loff_t length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	if (ext4_handle_valid(handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 		return jbd2_journal_inode_ranged_wait(handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 				EXT4_I(inode)->jinode, start_byte, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) static inline void ext4_update_inode_fsync_trans(handle_t *handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 						 struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 						 int datasync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	struct ext4_inode_info *ei = EXT4_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 	if (ext4_handle_valid(handle) && !is_handle_aborted(handle)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 		ei->i_sync_tid = handle->h_transaction->t_tid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 		if (datasync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 			ei->i_datasync_tid = handle->h_transaction->t_tid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) /* super.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) int ext4_force_commit(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)  * Ext4 inode journal modes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) #define EXT4_INODE_JOURNAL_DATA_MODE	0x01 /* journal data mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) #define EXT4_INODE_ORDERED_DATA_MODE	0x02 /* ordered data mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) #define EXT4_INODE_WRITEBACK_DATA_MODE	0x04 /* writeback data mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) int ext4_inode_journal_mode(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) static inline int ext4_should_journal_data(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 	return ext4_inode_journal_mode(inode) & EXT4_INODE_JOURNAL_DATA_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) static inline int ext4_should_order_data(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 	return ext4_inode_journal_mode(inode) & EXT4_INODE_ORDERED_DATA_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) static inline int ext4_should_writeback_data(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 	return ext4_inode_journal_mode(inode) & EXT4_INODE_WRITEBACK_DATA_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) static inline int ext4_free_data_revoke_credits(struct inode *inode, int blocks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 	if (!ext4_should_journal_data(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 	 * Data blocks in one extent are contiguous, just account for partial
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 	 * clusters at extent boundaries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 	return blocks + 2*(EXT4_SB(inode->i_sb)->s_cluster_ratio - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)  * This function controls whether or not we should try to go down the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)  * dioread_nolock code paths, which makes it safe to avoid taking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)  * i_mutex for direct I/O reads.  This only works for extent-based
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)  * files, and it doesn't work if data journaling is enabled, since the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)  * dioread_nolock code uses b_private to pass information back to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)  * I/O completion handler, and this conflicts with the jbd's use of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)  * b_private.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) static inline int ext4_should_dioread_nolock(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) 	if (!test_opt(inode->i_sb, DIOREAD_NOLOCK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 	if (!S_ISREG(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) 	if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) 	if (ext4_should_journal_data(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) 	/* temporary fix to prevent generic/422 test failures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) 	if (!test_opt(inode->i_sb, DELALLOC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) #endif	/* _EXT4_JBD2_H */