1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0+ 23dcf5451SChristoph Hellwig /* 33dcf5451SChristoph Hellwig * ext4_jbd2.h 43dcf5451SChristoph Hellwig * 53dcf5451SChristoph Hellwig * Written by Stephen C. Tweedie <sct@redhat.com>, 1999 63dcf5451SChristoph Hellwig * 73dcf5451SChristoph Hellwig * Copyright 1998--1999 Red Hat corp --- All Rights Reserved 83dcf5451SChristoph Hellwig * 93dcf5451SChristoph Hellwig * Ext4-specific journaling extensions. 103dcf5451SChristoph Hellwig */ 113dcf5451SChristoph Hellwig 123dcf5451SChristoph Hellwig #ifndef _EXT4_JBD2_H 133dcf5451SChristoph Hellwig #define _EXT4_JBD2_H 143dcf5451SChristoph Hellwig 153dcf5451SChristoph Hellwig #include <linux/fs.h> 163dcf5451SChristoph Hellwig #include <linux/jbd2.h> 173dcf5451SChristoph Hellwig #include "ext4.h" 183dcf5451SChristoph Hellwig 193dcf5451SChristoph Hellwig #define EXT4_JOURNAL(inode) (EXT4_SB((inode)->i_sb)->s_journal) 203dcf5451SChristoph Hellwig 213dcf5451SChristoph Hellwig /* Define the number of blocks we need to account to a transaction to 223dcf5451SChristoph Hellwig * modify one block of data. 233dcf5451SChristoph Hellwig * 243dcf5451SChristoph Hellwig * We may have to touch one inode, one bitmap buffer, up to three 253dcf5451SChristoph Hellwig * indirection blocks, the group and superblock summaries, and the data 263dcf5451SChristoph Hellwig * block to complete the transaction. 273dcf5451SChristoph Hellwig * 283dcf5451SChristoph Hellwig * For extents-enabled fs we may have to allocate and modify up to 29f45a5ef9SJan Kara * 5 levels of tree, data block (for each of these we need bitmap + group 30f45a5ef9SJan Kara * summaries), root which is stored in the inode, sb 31f45a5ef9SJan Kara */ 323dcf5451SChristoph Hellwig 333dcf5451SChristoph Hellwig #define EXT4_SINGLEDATA_TRANS_BLOCKS(sb) \ 34e2b911c5SDarrick J. Wong (ext4_has_feature_extents(sb) ? 20U : 8U) 353dcf5451SChristoph Hellwig 363dcf5451SChristoph Hellwig /* Extended attribute operations touch at most two data buffers, 373dcf5451SChristoph Hellwig * two bitmap buffers, and two group summaries, in addition to the inode 383dcf5451SChristoph Hellwig * and the superblock, which are already accounted for. */ 393dcf5451SChristoph Hellwig 403dcf5451SChristoph Hellwig #define EXT4_XATTR_TRANS_BLOCKS 6U 413dcf5451SChristoph Hellwig 423dcf5451SChristoph Hellwig /* Define the minimum size for a transaction which modifies data. This 433dcf5451SChristoph Hellwig * needs to take into account the fact that we may end up modifying two 443dcf5451SChristoph Hellwig * quota files too (one for the group, one for the user quota). The 453dcf5451SChristoph Hellwig * superblock only gets updated once, of course, so don't bother 463dcf5451SChristoph Hellwig * counting that again for the quota updates. */ 473dcf5451SChristoph Hellwig 483dcf5451SChristoph Hellwig #define EXT4_DATA_TRANS_BLOCKS(sb) (EXT4_SINGLEDATA_TRANS_BLOCKS(sb) + \ 493dcf5451SChristoph Hellwig EXT4_XATTR_TRANS_BLOCKS - 2 + \ 505aca07ebSDmitry Monakhov EXT4_MAXQUOTAS_TRANS_BLOCKS(sb)) 513dcf5451SChristoph Hellwig 52a02908f1SMingming Cao /* 53a02908f1SMingming Cao * Define the number of metadata blocks we need to account to modify data. 54a02908f1SMingming Cao * 55a02908f1SMingming Cao * This include super block, inode block, quota blocks and xattr blocks 56a02908f1SMingming Cao */ 57a02908f1SMingming Cao #define EXT4_META_TRANS_BLOCKS(sb) (EXT4_XATTR_TRANS_BLOCKS + \ 585aca07ebSDmitry Monakhov EXT4_MAXQUOTAS_TRANS_BLOCKS(sb)) 59a02908f1SMingming Cao 603dcf5451SChristoph Hellwig /* Define an arbitrary limit for the amount of data we will anticipate 613dcf5451SChristoph Hellwig * writing to any given transaction. For unbounded transactions such as 623dcf5451SChristoph Hellwig * write(2) and truncate(2) we can write more than this, but we always 633dcf5451SChristoph Hellwig * start off at the maximum transaction size and grow the transaction 643dcf5451SChristoph Hellwig * optimistically as we go. */ 653dcf5451SChristoph Hellwig 663dcf5451SChristoph Hellwig #define EXT4_MAX_TRANS_DATA 64U 673dcf5451SChristoph Hellwig 683dcf5451SChristoph Hellwig /* We break up a large truncate or write transaction once the handle's 693dcf5451SChristoph Hellwig * buffer credits gets this low, we need either to extend the 703dcf5451SChristoph Hellwig * transaction or to start a new one. Reserve enough space here for 713dcf5451SChristoph Hellwig * inode, bitmap, superblock, group and indirection updates for at least 723dcf5451SChristoph Hellwig * one block, plus two quota updates. Quota allocations are not 733dcf5451SChristoph Hellwig * needed. */ 743dcf5451SChristoph Hellwig 753dcf5451SChristoph Hellwig #define EXT4_RESERVE_TRANS_BLOCKS 12U 763dcf5451SChristoph Hellwig 77e08ac99fSArtem Blagodarenko /* 78e08ac99fSArtem Blagodarenko * Number of credits needed if we need to insert an entry into a 79e08ac99fSArtem Blagodarenko * directory. For each new index block, we need 4 blocks (old index 80e08ac99fSArtem Blagodarenko * block, new index block, bitmap block, bg summary). For normal 81e08ac99fSArtem Blagodarenko * htree directories there are 2 levels; if the largedir feature 82e08ac99fSArtem Blagodarenko * enabled it's 3 levels. 83e08ac99fSArtem Blagodarenko */ 84e08ac99fSArtem Blagodarenko #define EXT4_INDEX_EXTRA_TRANS_BLOCKS 12U 853dcf5451SChristoph Hellwig 863dcf5451SChristoph Hellwig #ifdef CONFIG_QUOTA 873dcf5451SChristoph Hellwig /* Amount of blocks needed for quota update - we know that the structure was 8821f97697SJan Kara * allocated so we need to update only data block */ 89*f177ee08SRoman Anufriev #define EXT4_QUOTA_TRANS_BLOCKS(sb) ((ext4_quota_capable(sb)) ? 1 : 0) 903dcf5451SChristoph Hellwig /* Amount of blocks needed for quota insert/delete - we do some block writes 913dcf5451SChristoph Hellwig * but inode, sb and group updates are done only once */ 92*f177ee08SRoman Anufriev #define EXT4_QUOTA_INIT_BLOCKS(sb) ((ext4_quota_capable(sb)) ?\ 937c319d32SAditya Kali (DQUOT_INIT_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\ 947c319d32SAditya Kali +3+DQUOT_INIT_REWRITE) : 0) 955aca07ebSDmitry Monakhov 96*f177ee08SRoman Anufriev #define EXT4_QUOTA_DEL_BLOCKS(sb) ((ext4_quota_capable(sb)) ?\ 977c319d32SAditya Kali (DQUOT_DEL_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\ 987c319d32SAditya Kali +3+DQUOT_DEL_REWRITE) : 0) 993dcf5451SChristoph Hellwig #else 1003dcf5451SChristoph Hellwig #define EXT4_QUOTA_TRANS_BLOCKS(sb) 0 1013dcf5451SChristoph Hellwig #define EXT4_QUOTA_INIT_BLOCKS(sb) 0 1023dcf5451SChristoph Hellwig #define EXT4_QUOTA_DEL_BLOCKS(sb) 0 1033dcf5451SChristoph Hellwig #endif 104a2d4a646SJan Kara #define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb)) 105a2d4a646SJan Kara #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb)) 106a2d4a646SJan Kara #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb)) 1073dcf5451SChristoph Hellwig 1089924a92aSTheodore Ts'o /* 1099924a92aSTheodore Ts'o * Ext4 handle operation types -- for logging purposes 1109924a92aSTheodore Ts'o */ 1119924a92aSTheodore Ts'o #define EXT4_HT_MISC 0 1129924a92aSTheodore Ts'o #define EXT4_HT_INODE 1 1139924a92aSTheodore Ts'o #define EXT4_HT_WRITE_PAGE 2 1149924a92aSTheodore Ts'o #define EXT4_HT_MAP_BLOCKS 3 1159924a92aSTheodore Ts'o #define EXT4_HT_DIR 4 1169924a92aSTheodore Ts'o #define EXT4_HT_TRUNCATE 5 1179924a92aSTheodore Ts'o #define EXT4_HT_QUOTA 6 1189924a92aSTheodore Ts'o #define EXT4_HT_RESIZE 7 1199924a92aSTheodore Ts'o #define EXT4_HT_MIGRATE 8 1209924a92aSTheodore Ts'o #define EXT4_HT_MOVE_EXTENTS 9 1219924a92aSTheodore Ts'o #define EXT4_HT_XATTR 10 1226b523df4SJan Kara #define EXT4_HT_EXT_CONVERT 11 1236b523df4SJan Kara #define EXT4_HT_MAX 12 1249924a92aSTheodore Ts'o 12518aadd47SBobi Jam /** 12618aadd47SBobi Jam * struct ext4_journal_cb_entry - Base structure for callback information. 12718aadd47SBobi Jam * 12818aadd47SBobi Jam * This struct is a 'seed' structure for a using with your own callback 12918aadd47SBobi Jam * structs. If you are using callbacks you must allocate one of these 13018aadd47SBobi Jam * or another struct of your own definition which has this struct 13118aadd47SBobi Jam * as it's first element and pass it to ext4_journal_callback_add(). 13218aadd47SBobi Jam */ 13318aadd47SBobi Jam struct ext4_journal_cb_entry { 13418aadd47SBobi Jam /* list information for other callbacks attached to the same handle */ 13518aadd47SBobi Jam struct list_head jce_list; 13618aadd47SBobi Jam 13718aadd47SBobi Jam /* Function to call with this callback structure */ 13818aadd47SBobi Jam void (*jce_func)(struct super_block *sb, 13918aadd47SBobi Jam struct ext4_journal_cb_entry *jce, int error); 14018aadd47SBobi Jam 14118aadd47SBobi Jam /* user data goes here */ 14218aadd47SBobi Jam }; 14318aadd47SBobi Jam 14418aadd47SBobi Jam /** 14518aadd47SBobi Jam * ext4_journal_callback_add: add a function to call after transaction commit 14618aadd47SBobi Jam * @handle: active journal transaction handle to register callback on 14718aadd47SBobi Jam * @func: callback function to call after the transaction has committed: 14818aadd47SBobi Jam * @sb: superblock of current filesystem for transaction 14918aadd47SBobi Jam * @jce: returned journal callback data 15018aadd47SBobi Jam * @rc: journal state at commit (0 = transaction committed properly) 15118aadd47SBobi Jam * @jce: journal callback data (internal and function private data struct) 15218aadd47SBobi Jam * 15318aadd47SBobi Jam * The registered function will be called in the context of the journal thread 15418aadd47SBobi Jam * after the transaction for which the handle was created has completed. 15518aadd47SBobi Jam * 15618aadd47SBobi Jam * No locks are held when the callback function is called, so it is safe to 15718aadd47SBobi Jam * call blocking functions from within the callback, but the callback should 15818aadd47SBobi Jam * not block or run for too long, or the filesystem will be blocked waiting for 15918aadd47SBobi Jam * the next transaction to commit. No journaling functions can be used, or 16018aadd47SBobi Jam * there is a risk of deadlock. 16118aadd47SBobi Jam * 16218aadd47SBobi Jam * There is no guaranteed calling order of multiple registered callbacks on 16318aadd47SBobi Jam * the same transaction. 16418aadd47SBobi Jam */ 165d08854f5STheodore Ts'o static inline void _ext4_journal_callback_add(handle_t *handle, 166d08854f5STheodore Ts'o struct ext4_journal_cb_entry *jce) 167d08854f5STheodore Ts'o { 168d08854f5STheodore Ts'o /* Add the jce to transaction's private list */ 169d08854f5STheodore Ts'o list_add_tail(&jce->jce_list, &handle->h_transaction->t_private_list); 170d08854f5STheodore Ts'o } 171d08854f5STheodore Ts'o 17218aadd47SBobi Jam static inline void ext4_journal_callback_add(handle_t *handle, 17318aadd47SBobi Jam void (*func)(struct super_block *sb, 17418aadd47SBobi Jam struct ext4_journal_cb_entry *jce, 17518aadd47SBobi Jam int rc), 17618aadd47SBobi Jam struct ext4_journal_cb_entry *jce) 17718aadd47SBobi Jam { 17818aadd47SBobi Jam struct ext4_sb_info *sbi = 17918aadd47SBobi Jam EXT4_SB(handle->h_transaction->t_journal->j_private); 18018aadd47SBobi Jam 18118aadd47SBobi Jam /* Add the jce to transaction's private list */ 18218aadd47SBobi Jam jce->jce_func = func; 18318aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 184d08854f5STheodore Ts'o _ext4_journal_callback_add(handle, jce); 18518aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 18618aadd47SBobi Jam } 18718aadd47SBobi Jam 188d08854f5STheodore Ts'o 18918aadd47SBobi Jam /** 19018aadd47SBobi Jam * ext4_journal_callback_del: delete a registered callback 19118aadd47SBobi Jam * @handle: active journal transaction handle on which callback was registered 19218aadd47SBobi Jam * @jce: registered journal callback entry to unregister 19370261f56SAnatol Pomozov * Return true if object was successfully removed 19418aadd47SBobi Jam */ 1955d3ee208SDmitry Monakhov static inline bool ext4_journal_callback_try_del(handle_t *handle, 19618aadd47SBobi Jam struct ext4_journal_cb_entry *jce) 19718aadd47SBobi Jam { 1985d3ee208SDmitry Monakhov bool deleted; 19918aadd47SBobi Jam struct ext4_sb_info *sbi = 20018aadd47SBobi Jam EXT4_SB(handle->h_transaction->t_journal->j_private); 20118aadd47SBobi Jam 20218aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 2035d3ee208SDmitry Monakhov deleted = !list_empty(&jce->jce_list); 20418aadd47SBobi Jam list_del_init(&jce->jce_list); 20518aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 2065d3ee208SDmitry Monakhov return deleted; 20718aadd47SBobi Jam } 20818aadd47SBobi Jam 2093dcf5451SChristoph Hellwig int 2103dcf5451SChristoph Hellwig ext4_mark_iloc_dirty(handle_t *handle, 2113dcf5451SChristoph Hellwig struct inode *inode, 2123dcf5451SChristoph Hellwig struct ext4_iloc *iloc); 2133dcf5451SChristoph Hellwig 2143dcf5451SChristoph Hellwig /* 2153dcf5451SChristoph Hellwig * On success, We end up with an outstanding reference count against 2163dcf5451SChristoph Hellwig * iloc->bh. This _must_ be cleaned up later. 2173dcf5451SChristoph Hellwig */ 2183dcf5451SChristoph Hellwig 2193dcf5451SChristoph Hellwig int ext4_reserve_inode_write(handle_t *handle, struct inode *inode, 2203dcf5451SChristoph Hellwig struct ext4_iloc *iloc); 2213dcf5451SChristoph Hellwig 2224209ae12SHarshad Shirwadkar #define ext4_mark_inode_dirty(__h, __i) \ 2234209ae12SHarshad Shirwadkar __ext4_mark_inode_dirty((__h), (__i), __func__, __LINE__) 2244209ae12SHarshad Shirwadkar int __ext4_mark_inode_dirty(handle_t *handle, struct inode *inode, 2254209ae12SHarshad Shirwadkar const char *func, unsigned int line); 2263dcf5451SChristoph Hellwig 227c03b45b8SMiao Xie int ext4_expand_extra_isize(struct inode *inode, 228c03b45b8SMiao Xie unsigned int new_extra_isize, 229c03b45b8SMiao Xie struct ext4_iloc *iloc); 2303dcf5451SChristoph Hellwig /* 231e4684b3fSTheodore Ts'o * Wrapper functions with which ext4 calls into JBD. 2323dcf5451SChristoph Hellwig */ 23390c7201bSTheodore Ts'o int __ext4_journal_get_write_access(const char *where, unsigned int line, 23490c7201bSTheodore Ts'o handle_t *handle, struct buffer_head *bh); 2353dcf5451SChristoph Hellwig 23690c7201bSTheodore Ts'o int __ext4_forget(const char *where, unsigned int line, handle_t *handle, 23790c7201bSTheodore Ts'o int is_metadata, struct inode *inode, 23890c7201bSTheodore Ts'o struct buffer_head *bh, ext4_fsblk_t blocknr); 23990c7201bSTheodore Ts'o 24090c7201bSTheodore Ts'o int __ext4_journal_get_create_access(const char *where, unsigned int line, 24190c7201bSTheodore Ts'o handle_t *handle, struct buffer_head *bh); 24290c7201bSTheodore Ts'o 24390c7201bSTheodore Ts'o int __ext4_handle_dirty_metadata(const char *where, unsigned int line, 24490c7201bSTheodore Ts'o handle_t *handle, struct inode *inode, 24590c7201bSTheodore Ts'o struct buffer_head *bh); 24690c7201bSTheodore Ts'o 24790c7201bSTheodore Ts'o int __ext4_handle_dirty_super(const char *where, unsigned int line, 248b50924c2SArtem Bityutskiy handle_t *handle, struct super_block *sb); 249a0375156STheodore Ts'o 2503dcf5451SChristoph Hellwig #define ext4_journal_get_write_access(handle, bh) \ 25190c7201bSTheodore Ts'o __ext4_journal_get_write_access(__func__, __LINE__, (handle), (bh)) 252d6797d14STheodore Ts'o #define ext4_forget(handle, is_metadata, inode, bh, block_nr) \ 25390c7201bSTheodore Ts'o __ext4_forget(__func__, __LINE__, (handle), (is_metadata), (inode), \ 25490c7201bSTheodore Ts'o (bh), (block_nr)) 2553dcf5451SChristoph Hellwig #define ext4_journal_get_create_access(handle, bh) \ 25690c7201bSTheodore Ts'o __ext4_journal_get_create_access(__func__, __LINE__, (handle), (bh)) 2570390131bSFrank Mayhar #define ext4_handle_dirty_metadata(handle, inode, bh) \ 25890c7201bSTheodore Ts'o __ext4_handle_dirty_metadata(__func__, __LINE__, (handle), (inode), \ 25990c7201bSTheodore Ts'o (bh)) 260a0375156STheodore Ts'o #define ext4_handle_dirty_super(handle, sb) \ 261b50924c2SArtem Bityutskiy __ext4_handle_dirty_super(__func__, __LINE__, (handle), (sb)) 2623dcf5451SChristoph Hellwig 2639924a92aSTheodore Ts'o handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line, 26483448bdfSJan Kara int type, int blocks, int rsv_blocks, 26583448bdfSJan Kara int revoke_creds); 266c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle); 2673dcf5451SChristoph Hellwig 268d3d1faf6SCurt Wohlgemuth #define EXT4_NOJOURNAL_MAX_REF_COUNT ((unsigned long) 4096) 2690390131bSFrank Mayhar 270d3d1faf6SCurt Wohlgemuth /* Note: Do not use this for NULL handles. This is only to determine if 271d3d1faf6SCurt Wohlgemuth * a properly allocated handle is using a journal or not. */ 2720390131bSFrank Mayhar static inline int ext4_handle_valid(handle_t *handle) 2730390131bSFrank Mayhar { 274d3d1faf6SCurt Wohlgemuth if ((unsigned long)handle < EXT4_NOJOURNAL_MAX_REF_COUNT) 2750390131bSFrank Mayhar return 0; 2760390131bSFrank Mayhar return 1; 2770390131bSFrank Mayhar } 2780390131bSFrank Mayhar 2790390131bSFrank Mayhar static inline void ext4_handle_sync(handle_t *handle) 2800390131bSFrank Mayhar { 2810390131bSFrank Mayhar if (ext4_handle_valid(handle)) 2820390131bSFrank Mayhar handle->h_sync = 1; 2830390131bSFrank Mayhar } 2840390131bSFrank Mayhar 2850390131bSFrank Mayhar static inline int ext4_handle_is_aborted(handle_t *handle) 2860390131bSFrank Mayhar { 2870390131bSFrank Mayhar if (ext4_handle_valid(handle)) 2880390131bSFrank Mayhar return is_handle_aborted(handle); 2890390131bSFrank Mayhar return 0; 2900390131bSFrank Mayhar } 2910390131bSFrank Mayhar 29283448bdfSJan Kara static inline int ext4_free_metadata_revoke_credits(struct super_block *sb, 29383448bdfSJan Kara int blocks) 29483448bdfSJan Kara { 29583448bdfSJan Kara /* Freeing each metadata block can result in freeing one cluster */ 29683448bdfSJan Kara return blocks * EXT4_SB(sb)->s_cluster_ratio; 29783448bdfSJan Kara } 29883448bdfSJan Kara 29983448bdfSJan Kara static inline int ext4_trans_default_revoke_credits(struct super_block *sb) 30083448bdfSJan Kara { 30183448bdfSJan Kara return ext4_free_metadata_revoke_credits(sb, 8); 30283448bdfSJan Kara } 30383448bdfSJan Kara 3049924a92aSTheodore Ts'o #define ext4_journal_start_sb(sb, type, nblocks) \ 30583448bdfSJan Kara __ext4_journal_start_sb((sb), __LINE__, (type), (nblocks), 0, \ 30683448bdfSJan Kara ext4_trans_default_revoke_credits(sb)) 3079924a92aSTheodore Ts'o 3089924a92aSTheodore Ts'o #define ext4_journal_start(inode, type, nblocks) \ 30983448bdfSJan Kara __ext4_journal_start((inode), __LINE__, (type), (nblocks), 0, \ 31083448bdfSJan Kara ext4_trans_default_revoke_credits((inode)->i_sb)) 3115fe2fe89SJan Kara 3125fe2fe89SJan Kara #define ext4_journal_start_with_reserve(inode, type, blocks, rsv_blocks)\ 31383448bdfSJan Kara __ext4_journal_start((inode), __LINE__, (type), (blocks), (rsv_blocks),\ 31483448bdfSJan Kara ext4_trans_default_revoke_credits((inode)->i_sb)) 31583448bdfSJan Kara 31683448bdfSJan Kara #define ext4_journal_start_with_revoke(inode, type, blocks, revoke_creds) \ 31783448bdfSJan Kara __ext4_journal_start((inode), __LINE__, (type), (blocks), 0, \ 31883448bdfSJan Kara (revoke_creds)) 3199924a92aSTheodore Ts'o 3209924a92aSTheodore Ts'o static inline handle_t *__ext4_journal_start(struct inode *inode, 3219924a92aSTheodore Ts'o unsigned int line, int type, 32283448bdfSJan Kara int blocks, int rsv_blocks, 32383448bdfSJan Kara int revoke_creds) 3243dcf5451SChristoph Hellwig { 3255fe2fe89SJan Kara return __ext4_journal_start_sb(inode->i_sb, line, type, blocks, 32683448bdfSJan Kara rsv_blocks, revoke_creds); 3273dcf5451SChristoph Hellwig } 3283dcf5451SChristoph Hellwig 3293dcf5451SChristoph Hellwig #define ext4_journal_stop(handle) \ 330c398eda0STheodore Ts'o __ext4_journal_stop(__func__, __LINE__, (handle)) 3313dcf5451SChristoph Hellwig 3326b523df4SJan Kara #define ext4_journal_start_reserved(handle, type) \ 3335fe2fe89SJan Kara __ext4_journal_start_reserved((handle), __LINE__, (type)) 3345fe2fe89SJan Kara 3355fe2fe89SJan Kara handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line, 3365fe2fe89SJan Kara int type); 3375fe2fe89SJan Kara 3383dcf5451SChristoph Hellwig static inline handle_t *ext4_journal_current_handle(void) 3393dcf5451SChristoph Hellwig { 3403dcf5451SChristoph Hellwig return journal_current_handle(); 3413dcf5451SChristoph Hellwig } 3423dcf5451SChristoph Hellwig 34383448bdfSJan Kara static inline int ext4_journal_extend(handle_t *handle, int nblocks, int revoke) 3443dcf5451SChristoph Hellwig { 3450390131bSFrank Mayhar if (ext4_handle_valid(handle)) 34683448bdfSJan Kara return jbd2_journal_extend(handle, nblocks, revoke); 3470390131bSFrank Mayhar return 0; 3483dcf5451SChristoph Hellwig } 3493dcf5451SChristoph Hellwig 35083448bdfSJan Kara static inline int ext4_journal_restart(handle_t *handle, int nblocks, 35183448bdfSJan Kara int revoke) 3523dcf5451SChristoph Hellwig { 3530390131bSFrank Mayhar if (ext4_handle_valid(handle)) 35483448bdfSJan Kara return jbd2__journal_restart(handle, nblocks, revoke, GFP_NOFS); 3550390131bSFrank Mayhar return 0; 3563dcf5451SChristoph Hellwig } 3573dcf5451SChristoph Hellwig 358a4130367SJan Kara int __ext4_journal_ensure_credits(handle_t *handle, int check_cred, 35983448bdfSJan Kara int extend_cred, int revoke_cred); 360a4130367SJan Kara 361a4130367SJan Kara 362a4130367SJan Kara /* 363a4130367SJan Kara * Ensure @handle has at least @check_creds credits available. If not, 364a4130367SJan Kara * transaction will be extended or restarted to contain at least @extend_cred 365a4130367SJan Kara * credits. Before restarting transaction @fn is executed to allow for cleanup 366a4130367SJan Kara * before the transaction is restarted. 367a4130367SJan Kara * 368a4130367SJan Kara * The return value is < 0 in case of error, 0 in case the handle has enough 369a4130367SJan Kara * credits or transaction extension succeeded, 1 in case transaction had to be 370a4130367SJan Kara * restarted. 371a4130367SJan Kara */ 37283448bdfSJan Kara #define ext4_journal_ensure_credits_fn(handle, check_cred, extend_cred, \ 37383448bdfSJan Kara revoke_cred, fn) \ 374a4130367SJan Kara ({ \ 375a4130367SJan Kara __label__ __ensure_end; \ 376a4130367SJan Kara int err = __ext4_journal_ensure_credits((handle), (check_cred), \ 37783448bdfSJan Kara (extend_cred), (revoke_cred)); \ 378a4130367SJan Kara \ 379a4130367SJan Kara if (err <= 0) \ 380a4130367SJan Kara goto __ensure_end; \ 381a4130367SJan Kara err = (fn); \ 382a4130367SJan Kara if (err < 0) \ 383a4130367SJan Kara goto __ensure_end; \ 38483448bdfSJan Kara err = ext4_journal_restart((handle), (extend_cred), (revoke_cred)); \ 385a4130367SJan Kara if (err == 0) \ 386a4130367SJan Kara err = 1; \ 387a4130367SJan Kara __ensure_end: \ 388a4130367SJan Kara err; \ 389a4130367SJan Kara }) 390a4130367SJan Kara 391a4130367SJan Kara /* 392a4130367SJan Kara * Ensure given handle has at least requested amount of credits available, 39383448bdfSJan Kara * possibly restarting transaction if needed. We also make sure the transaction 39483448bdfSJan Kara * has space for at least ext4_trans_default_revoke_credits(sb) revoke records 39583448bdfSJan Kara * as freeing one or two blocks is very common pattern and requesting this is 39683448bdfSJan Kara * very cheap. 397a4130367SJan Kara */ 39883448bdfSJan Kara static inline int ext4_journal_ensure_credits(handle_t *handle, int credits, 39983448bdfSJan Kara int revoke_creds) 400a4130367SJan Kara { 40183448bdfSJan Kara return ext4_journal_ensure_credits_fn(handle, credits, credits, 40283448bdfSJan Kara revoke_creds, 0); 403a4130367SJan Kara } 404a4130367SJan Kara 4053dcf5451SChristoph Hellwig static inline int ext4_journal_blocks_per_page(struct inode *inode) 4063dcf5451SChristoph Hellwig { 4070390131bSFrank Mayhar if (EXT4_JOURNAL(inode) != NULL) 4083dcf5451SChristoph Hellwig return jbd2_journal_blocks_per_page(inode); 4090390131bSFrank Mayhar return 0; 4103dcf5451SChristoph Hellwig } 4113dcf5451SChristoph Hellwig 4123dcf5451SChristoph Hellwig static inline int ext4_journal_force_commit(journal_t *journal) 4133dcf5451SChristoph Hellwig { 4140390131bSFrank Mayhar if (journal) 4153dcf5451SChristoph Hellwig return jbd2_journal_force_commit(journal); 4160390131bSFrank Mayhar return 0; 4173dcf5451SChristoph Hellwig } 4183dcf5451SChristoph Hellwig 419ee0876bcSJan Kara static inline int ext4_jbd2_inode_add_write(handle_t *handle, 42073131fbbSRoss Zwisler struct inode *inode, loff_t start_byte, loff_t length) 421678aaf48SJan Kara { 4220390131bSFrank Mayhar if (ext4_handle_valid(handle)) 42373131fbbSRoss Zwisler return jbd2_journal_inode_ranged_write(handle, 42473131fbbSRoss Zwisler EXT4_I(inode)->jinode, start_byte, length); 4250390131bSFrank Mayhar return 0; 426678aaf48SJan Kara } 427678aaf48SJan Kara 428ee0876bcSJan Kara static inline int ext4_jbd2_inode_add_wait(handle_t *handle, 42973131fbbSRoss Zwisler struct inode *inode, loff_t start_byte, loff_t length) 430ee0876bcSJan Kara { 431ee0876bcSJan Kara if (ext4_handle_valid(handle)) 43273131fbbSRoss Zwisler return jbd2_journal_inode_ranged_wait(handle, 43373131fbbSRoss Zwisler EXT4_I(inode)->jinode, start_byte, length); 434ee0876bcSJan Kara return 0; 435ee0876bcSJan Kara } 436ee0876bcSJan Kara 437b436b9beSJan Kara static inline void ext4_update_inode_fsync_trans(handle_t *handle, 438b436b9beSJan Kara struct inode *inode, 439b436b9beSJan Kara int datasync) 440b436b9beSJan Kara { 441b436b9beSJan Kara struct ext4_inode_info *ei = EXT4_I(inode); 442b436b9beSJan Kara 443fa30dde3SJiufei Xue if (ext4_handle_valid(handle) && !is_handle_aborted(handle)) { 444b436b9beSJan Kara ei->i_sync_tid = handle->h_transaction->t_tid; 445b436b9beSJan Kara if (datasync) 446b436b9beSJan Kara ei->i_datasync_tid = handle->h_transaction->t_tid; 447b436b9beSJan Kara } 448b436b9beSJan Kara } 449b436b9beSJan Kara 4503dcf5451SChristoph Hellwig /* super.c */ 4513dcf5451SChristoph Hellwig int ext4_force_commit(struct super_block *sb); 4523dcf5451SChristoph Hellwig 4533d2b1582SLukas Czerner /* 4543d2b1582SLukas Czerner * Ext4 inode journal modes 4553d2b1582SLukas Czerner */ 4563d2b1582SLukas Czerner #define EXT4_INODE_JOURNAL_DATA_MODE 0x01 /* journal data mode */ 4573d2b1582SLukas Czerner #define EXT4_INODE_ORDERED_DATA_MODE 0x02 /* ordered data mode */ 4583d2b1582SLukas Czerner #define EXT4_INODE_WRITEBACK_DATA_MODE 0x04 /* writeback data mode */ 4593d2b1582SLukas Czerner 46046797ad7SEric Biggers int ext4_inode_journal_mode(struct inode *inode); 4613d2b1582SLukas Czerner 4623d2b1582SLukas Czerner static inline int ext4_should_journal_data(struct inode *inode) 4633d2b1582SLukas Czerner { 4643d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_JOURNAL_DATA_MODE; 4653dcf5451SChristoph Hellwig } 4663dcf5451SChristoph Hellwig 4673dcf5451SChristoph Hellwig static inline int ext4_should_order_data(struct inode *inode) 4683dcf5451SChristoph Hellwig { 4693d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_ORDERED_DATA_MODE; 4703dcf5451SChristoph Hellwig } 4713dcf5451SChristoph Hellwig 4723dcf5451SChristoph Hellwig static inline int ext4_should_writeback_data(struct inode *inode) 4733dcf5451SChristoph Hellwig { 4743d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_WRITEBACK_DATA_MODE; 4753dcf5451SChristoph Hellwig } 4763dcf5451SChristoph Hellwig 47783448bdfSJan Kara static inline int ext4_free_data_revoke_credits(struct inode *inode, int blocks) 47883448bdfSJan Kara { 47983448bdfSJan Kara if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 48083448bdfSJan Kara return 0; 48183448bdfSJan Kara if (!ext4_should_journal_data(inode)) 48283448bdfSJan Kara return 0; 48383448bdfSJan Kara /* 48483448bdfSJan Kara * Data blocks in one extent are contiguous, just account for partial 48583448bdfSJan Kara * clusters at extent boundaries 48683448bdfSJan Kara */ 48783448bdfSJan Kara return blocks + 2*(EXT4_SB(inode->i_sb)->s_cluster_ratio - 1); 48883448bdfSJan Kara } 48983448bdfSJan Kara 490744692dcSJiaying Zhang /* 491744692dcSJiaying Zhang * This function controls whether or not we should try to go down the 492744692dcSJiaying Zhang * dioread_nolock code paths, which makes it safe to avoid taking 493744692dcSJiaying Zhang * i_mutex for direct I/O reads. This only works for extent-based 494206f7ab4SChristoph Hellwig * files, and it doesn't work if data journaling is enabled, since the 495206f7ab4SChristoph Hellwig * dioread_nolock code uses b_private to pass information back to the 496206f7ab4SChristoph Hellwig * I/O completion handler, and this conflicts with the jbd's use of 497206f7ab4SChristoph Hellwig * b_private. 498744692dcSJiaying Zhang */ 499744692dcSJiaying Zhang static inline int ext4_should_dioread_nolock(struct inode *inode) 500744692dcSJiaying Zhang { 501744692dcSJiaying Zhang if (!test_opt(inode->i_sb, DIOREAD_NOLOCK)) 502744692dcSJiaying Zhang return 0; 503744692dcSJiaying Zhang if (!S_ISREG(inode->i_mode)) 504744692dcSJiaying Zhang return 0; 50512e9b892SDmitry Monakhov if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) 506744692dcSJiaying Zhang return 0; 507744692dcSJiaying Zhang if (ext4_should_journal_data(inode)) 508744692dcSJiaying Zhang return 0; 509c8980e19SEric Whitney /* temporary fix to prevent generic/422 test failures */ 510c8980e19SEric Whitney if (!test_opt(inode->i_sb, DELALLOC)) 511c8980e19SEric Whitney return 0; 512744692dcSJiaying Zhang return 1; 513744692dcSJiaying Zhang } 514744692dcSJiaying Zhang 5153dcf5451SChristoph Hellwig #endif /* _EXT4_JBD2_H */ 516