13dcf5451SChristoph Hellwig /* 23dcf5451SChristoph Hellwig * ext4_jbd2.h 33dcf5451SChristoph Hellwig * 43dcf5451SChristoph Hellwig * Written by Stephen C. Tweedie <sct@redhat.com>, 1999 53dcf5451SChristoph Hellwig * 63dcf5451SChristoph Hellwig * Copyright 1998--1999 Red Hat corp --- All Rights Reserved 73dcf5451SChristoph Hellwig * 83dcf5451SChristoph Hellwig * This file is part of the Linux kernel and is made available under 93dcf5451SChristoph Hellwig * the terms of the GNU General Public License, version 2, or at your 103dcf5451SChristoph Hellwig * option, any later version, incorporated herein by reference. 113dcf5451SChristoph Hellwig * 123dcf5451SChristoph Hellwig * Ext4-specific journaling extensions. 133dcf5451SChristoph Hellwig */ 143dcf5451SChristoph Hellwig 153dcf5451SChristoph Hellwig #ifndef _EXT4_JBD2_H 163dcf5451SChristoph Hellwig #define _EXT4_JBD2_H 173dcf5451SChristoph Hellwig 183dcf5451SChristoph Hellwig #include <linux/fs.h> 193dcf5451SChristoph Hellwig #include <linux/jbd2.h> 203dcf5451SChristoph Hellwig #include "ext4.h" 213dcf5451SChristoph Hellwig 223dcf5451SChristoph Hellwig #define EXT4_JOURNAL(inode) (EXT4_SB((inode)->i_sb)->s_journal) 233dcf5451SChristoph Hellwig 243dcf5451SChristoph Hellwig /* Define the number of blocks we need to account to a transaction to 253dcf5451SChristoph Hellwig * modify one block of data. 263dcf5451SChristoph Hellwig * 273dcf5451SChristoph Hellwig * We may have to touch one inode, one bitmap buffer, up to three 283dcf5451SChristoph Hellwig * indirection blocks, the group and superblock summaries, and the data 293dcf5451SChristoph Hellwig * block to complete the transaction. 303dcf5451SChristoph Hellwig * 313dcf5451SChristoph Hellwig * For extents-enabled fs we may have to allocate and modify up to 32f45a5ef9SJan Kara * 5 levels of tree, data block (for each of these we need bitmap + group 33f45a5ef9SJan Kara * summaries), root which is stored in the inode, sb 34f45a5ef9SJan Kara */ 353dcf5451SChristoph Hellwig 363dcf5451SChristoph Hellwig #define EXT4_SINGLEDATA_TRANS_BLOCKS(sb) \ 37e2b911c5SDarrick J. Wong (ext4_has_feature_extents(sb) ? 20U : 8U) 383dcf5451SChristoph Hellwig 393dcf5451SChristoph Hellwig /* Extended attribute operations touch at most two data buffers, 403dcf5451SChristoph Hellwig * two bitmap buffers, and two group summaries, in addition to the inode 413dcf5451SChristoph Hellwig * and the superblock, which are already accounted for. */ 423dcf5451SChristoph Hellwig 433dcf5451SChristoph Hellwig #define EXT4_XATTR_TRANS_BLOCKS 6U 443dcf5451SChristoph Hellwig 453dcf5451SChristoph Hellwig /* Define the minimum size for a transaction which modifies data. This 463dcf5451SChristoph Hellwig * needs to take into account the fact that we may end up modifying two 473dcf5451SChristoph Hellwig * quota files too (one for the group, one for the user quota). The 483dcf5451SChristoph Hellwig * superblock only gets updated once, of course, so don't bother 493dcf5451SChristoph Hellwig * counting that again for the quota updates. */ 503dcf5451SChristoph Hellwig 513dcf5451SChristoph Hellwig #define EXT4_DATA_TRANS_BLOCKS(sb) (EXT4_SINGLEDATA_TRANS_BLOCKS(sb) + \ 523dcf5451SChristoph Hellwig EXT4_XATTR_TRANS_BLOCKS - 2 + \ 535aca07ebSDmitry Monakhov EXT4_MAXQUOTAS_TRANS_BLOCKS(sb)) 543dcf5451SChristoph Hellwig 55a02908f1SMingming Cao /* 56a02908f1SMingming Cao * Define the number of metadata blocks we need to account to modify data. 57a02908f1SMingming Cao * 58a02908f1SMingming Cao * This include super block, inode block, quota blocks and xattr blocks 59a02908f1SMingming Cao */ 60a02908f1SMingming Cao #define EXT4_META_TRANS_BLOCKS(sb) (EXT4_XATTR_TRANS_BLOCKS + \ 615aca07ebSDmitry Monakhov EXT4_MAXQUOTAS_TRANS_BLOCKS(sb)) 62a02908f1SMingming Cao 633dcf5451SChristoph Hellwig /* Define an arbitrary limit for the amount of data we will anticipate 643dcf5451SChristoph Hellwig * writing to any given transaction. For unbounded transactions such as 653dcf5451SChristoph Hellwig * write(2) and truncate(2) we can write more than this, but we always 663dcf5451SChristoph Hellwig * start off at the maximum transaction size and grow the transaction 673dcf5451SChristoph Hellwig * optimistically as we go. */ 683dcf5451SChristoph Hellwig 693dcf5451SChristoph Hellwig #define EXT4_MAX_TRANS_DATA 64U 703dcf5451SChristoph Hellwig 713dcf5451SChristoph Hellwig /* We break up a large truncate or write transaction once the handle's 723dcf5451SChristoph Hellwig * buffer credits gets this low, we need either to extend the 733dcf5451SChristoph Hellwig * transaction or to start a new one. Reserve enough space here for 743dcf5451SChristoph Hellwig * inode, bitmap, superblock, group and indirection updates for at least 753dcf5451SChristoph Hellwig * one block, plus two quota updates. Quota allocations are not 763dcf5451SChristoph Hellwig * needed. */ 773dcf5451SChristoph Hellwig 783dcf5451SChristoph Hellwig #define EXT4_RESERVE_TRANS_BLOCKS 12U 793dcf5451SChristoph Hellwig 803dcf5451SChristoph Hellwig #define EXT4_INDEX_EXTRA_TRANS_BLOCKS 8 813dcf5451SChristoph Hellwig 823dcf5451SChristoph Hellwig #ifdef CONFIG_QUOTA 833dcf5451SChristoph Hellwig /* Amount of blocks needed for quota update - we know that the structure was 8421f97697SJan Kara * allocated so we need to update only data block */ 857c319d32SAditya Kali #define EXT4_QUOTA_TRANS_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\ 86e2b911c5SDarrick J. Wong ext4_has_feature_quota(sb)) ? 1 : 0) 873dcf5451SChristoph Hellwig /* Amount of blocks needed for quota insert/delete - we do some block writes 883dcf5451SChristoph Hellwig * but inode, sb and group updates are done only once */ 897c319d32SAditya Kali #define EXT4_QUOTA_INIT_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\ 90e2b911c5SDarrick J. Wong ext4_has_feature_quota(sb)) ?\ 917c319d32SAditya Kali (DQUOT_INIT_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\ 927c319d32SAditya Kali +3+DQUOT_INIT_REWRITE) : 0) 935aca07ebSDmitry Monakhov 947c319d32SAditya Kali #define EXT4_QUOTA_DEL_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\ 95e2b911c5SDarrick J. Wong ext4_has_feature_quota(sb)) ?\ 967c319d32SAditya Kali (DQUOT_DEL_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\ 977c319d32SAditya Kali +3+DQUOT_DEL_REWRITE) : 0) 983dcf5451SChristoph Hellwig #else 993dcf5451SChristoph Hellwig #define EXT4_QUOTA_TRANS_BLOCKS(sb) 0 1003dcf5451SChristoph Hellwig #define EXT4_QUOTA_INIT_BLOCKS(sb) 0 1013dcf5451SChristoph Hellwig #define EXT4_QUOTA_DEL_BLOCKS(sb) 0 1023dcf5451SChristoph Hellwig #endif 103a2d4a646SJan Kara #define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb)) 104a2d4a646SJan Kara #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb)) 105a2d4a646SJan Kara #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb)) 1063dcf5451SChristoph Hellwig 10795eaefbdSTheodore Ts'o static inline int ext4_jbd2_credits_xattr(struct inode *inode) 10895eaefbdSTheodore Ts'o { 10995eaefbdSTheodore Ts'o int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb); 11095eaefbdSTheodore Ts'o 11195eaefbdSTheodore Ts'o /* 11295eaefbdSTheodore Ts'o * In case of inline data, we may push out the data to a block, 11395eaefbdSTheodore Ts'o * so we need to reserve credits for this eventuality 11495eaefbdSTheodore Ts'o */ 11595eaefbdSTheodore Ts'o if (ext4_has_inline_data(inode)) 11695eaefbdSTheodore Ts'o credits += ext4_writepage_trans_blocks(inode) + 1; 11795eaefbdSTheodore Ts'o return credits; 11895eaefbdSTheodore Ts'o } 11995eaefbdSTheodore Ts'o 12095eaefbdSTheodore Ts'o 1219924a92aSTheodore Ts'o /* 1229924a92aSTheodore Ts'o * Ext4 handle operation types -- for logging purposes 1239924a92aSTheodore Ts'o */ 1249924a92aSTheodore Ts'o #define EXT4_HT_MISC 0 1259924a92aSTheodore Ts'o #define EXT4_HT_INODE 1 1269924a92aSTheodore Ts'o #define EXT4_HT_WRITE_PAGE 2 1279924a92aSTheodore Ts'o #define EXT4_HT_MAP_BLOCKS 3 1289924a92aSTheodore Ts'o #define EXT4_HT_DIR 4 1299924a92aSTheodore Ts'o #define EXT4_HT_TRUNCATE 5 1309924a92aSTheodore Ts'o #define EXT4_HT_QUOTA 6 1319924a92aSTheodore Ts'o #define EXT4_HT_RESIZE 7 1329924a92aSTheodore Ts'o #define EXT4_HT_MIGRATE 8 1339924a92aSTheodore Ts'o #define EXT4_HT_MOVE_EXTENTS 9 1349924a92aSTheodore Ts'o #define EXT4_HT_XATTR 10 1356b523df4SJan Kara #define EXT4_HT_EXT_CONVERT 11 1366b523df4SJan Kara #define EXT4_HT_MAX 12 1379924a92aSTheodore Ts'o 13818aadd47SBobi Jam /** 13918aadd47SBobi Jam * struct ext4_journal_cb_entry - Base structure for callback information. 14018aadd47SBobi Jam * 14118aadd47SBobi Jam * This struct is a 'seed' structure for a using with your own callback 14218aadd47SBobi Jam * structs. If you are using callbacks you must allocate one of these 14318aadd47SBobi Jam * or another struct of your own definition which has this struct 14418aadd47SBobi Jam * as it's first element and pass it to ext4_journal_callback_add(). 14518aadd47SBobi Jam */ 14618aadd47SBobi Jam struct ext4_journal_cb_entry { 14718aadd47SBobi Jam /* list information for other callbacks attached to the same handle */ 14818aadd47SBobi Jam struct list_head jce_list; 14918aadd47SBobi Jam 15018aadd47SBobi Jam /* Function to call with this callback structure */ 15118aadd47SBobi Jam void (*jce_func)(struct super_block *sb, 15218aadd47SBobi Jam struct ext4_journal_cb_entry *jce, int error); 15318aadd47SBobi Jam 15418aadd47SBobi Jam /* user data goes here */ 15518aadd47SBobi Jam }; 15618aadd47SBobi Jam 15718aadd47SBobi Jam /** 15818aadd47SBobi Jam * ext4_journal_callback_add: add a function to call after transaction commit 15918aadd47SBobi Jam * @handle: active journal transaction handle to register callback on 16018aadd47SBobi Jam * @func: callback function to call after the transaction has committed: 16118aadd47SBobi Jam * @sb: superblock of current filesystem for transaction 16218aadd47SBobi Jam * @jce: returned journal callback data 16318aadd47SBobi Jam * @rc: journal state at commit (0 = transaction committed properly) 16418aadd47SBobi Jam * @jce: journal callback data (internal and function private data struct) 16518aadd47SBobi Jam * 16618aadd47SBobi Jam * The registered function will be called in the context of the journal thread 16718aadd47SBobi Jam * after the transaction for which the handle was created has completed. 16818aadd47SBobi Jam * 16918aadd47SBobi Jam * No locks are held when the callback function is called, so it is safe to 17018aadd47SBobi Jam * call blocking functions from within the callback, but the callback should 17118aadd47SBobi Jam * not block or run for too long, or the filesystem will be blocked waiting for 17218aadd47SBobi Jam * the next transaction to commit. No journaling functions can be used, or 17318aadd47SBobi Jam * there is a risk of deadlock. 17418aadd47SBobi Jam * 17518aadd47SBobi Jam * There is no guaranteed calling order of multiple registered callbacks on 17618aadd47SBobi Jam * the same transaction. 17718aadd47SBobi Jam */ 17818aadd47SBobi Jam static inline void ext4_journal_callback_add(handle_t *handle, 17918aadd47SBobi Jam void (*func)(struct super_block *sb, 18018aadd47SBobi Jam struct ext4_journal_cb_entry *jce, 18118aadd47SBobi Jam int rc), 18218aadd47SBobi Jam struct ext4_journal_cb_entry *jce) 18318aadd47SBobi Jam { 18418aadd47SBobi Jam struct ext4_sb_info *sbi = 18518aadd47SBobi Jam EXT4_SB(handle->h_transaction->t_journal->j_private); 18618aadd47SBobi Jam 18718aadd47SBobi Jam /* Add the jce to transaction's private list */ 18818aadd47SBobi Jam jce->jce_func = func; 18918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 19018aadd47SBobi Jam list_add_tail(&jce->jce_list, &handle->h_transaction->t_private_list); 19118aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 19218aadd47SBobi Jam } 19318aadd47SBobi Jam 19418aadd47SBobi Jam /** 19518aadd47SBobi Jam * ext4_journal_callback_del: delete a registered callback 19618aadd47SBobi Jam * @handle: active journal transaction handle on which callback was registered 19718aadd47SBobi Jam * @jce: registered journal callback entry to unregister 19870261f56SAnatol Pomozov * Return true if object was successfully removed 19918aadd47SBobi Jam */ 2005d3ee208SDmitry Monakhov static inline bool ext4_journal_callback_try_del(handle_t *handle, 20118aadd47SBobi Jam struct ext4_journal_cb_entry *jce) 20218aadd47SBobi Jam { 2035d3ee208SDmitry Monakhov bool deleted; 20418aadd47SBobi Jam struct ext4_sb_info *sbi = 20518aadd47SBobi Jam EXT4_SB(handle->h_transaction->t_journal->j_private); 20618aadd47SBobi Jam 20718aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 2085d3ee208SDmitry Monakhov deleted = !list_empty(&jce->jce_list); 20918aadd47SBobi Jam list_del_init(&jce->jce_list); 21018aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 2115d3ee208SDmitry Monakhov return deleted; 21218aadd47SBobi Jam } 21318aadd47SBobi Jam 2143dcf5451SChristoph Hellwig int 2153dcf5451SChristoph Hellwig ext4_mark_iloc_dirty(handle_t *handle, 2163dcf5451SChristoph Hellwig struct inode *inode, 2173dcf5451SChristoph Hellwig struct ext4_iloc *iloc); 2183dcf5451SChristoph Hellwig 2193dcf5451SChristoph Hellwig /* 2203dcf5451SChristoph Hellwig * On success, We end up with an outstanding reference count against 2213dcf5451SChristoph Hellwig * iloc->bh. This _must_ be cleaned up later. 2223dcf5451SChristoph Hellwig */ 2233dcf5451SChristoph Hellwig 2243dcf5451SChristoph Hellwig int ext4_reserve_inode_write(handle_t *handle, struct inode *inode, 2253dcf5451SChristoph Hellwig struct ext4_iloc *iloc); 2263dcf5451SChristoph Hellwig 2273dcf5451SChristoph Hellwig int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode); 2283dcf5451SChristoph Hellwig 2293dcf5451SChristoph Hellwig /* 230e4684b3fSTheodore Ts'o * Wrapper functions with which ext4 calls into JBD. 2313dcf5451SChristoph Hellwig */ 23290c7201bSTheodore Ts'o int __ext4_journal_get_write_access(const char *where, unsigned int line, 23390c7201bSTheodore Ts'o handle_t *handle, struct buffer_head *bh); 2343dcf5451SChristoph Hellwig 23590c7201bSTheodore Ts'o int __ext4_forget(const char *where, unsigned int line, handle_t *handle, 23690c7201bSTheodore Ts'o int is_metadata, struct inode *inode, 23790c7201bSTheodore Ts'o struct buffer_head *bh, ext4_fsblk_t blocknr); 23890c7201bSTheodore Ts'o 23990c7201bSTheodore Ts'o int __ext4_journal_get_create_access(const char *where, unsigned int line, 24090c7201bSTheodore Ts'o handle_t *handle, struct buffer_head *bh); 24190c7201bSTheodore Ts'o 24290c7201bSTheodore Ts'o int __ext4_handle_dirty_metadata(const char *where, unsigned int line, 24390c7201bSTheodore Ts'o handle_t *handle, struct inode *inode, 24490c7201bSTheodore Ts'o struct buffer_head *bh); 24590c7201bSTheodore Ts'o 24690c7201bSTheodore Ts'o int __ext4_handle_dirty_super(const char *where, unsigned int line, 247b50924c2SArtem Bityutskiy handle_t *handle, struct super_block *sb); 248a0375156STheodore Ts'o 2493dcf5451SChristoph Hellwig #define ext4_journal_get_write_access(handle, bh) \ 25090c7201bSTheodore Ts'o __ext4_journal_get_write_access(__func__, __LINE__, (handle), (bh)) 251d6797d14STheodore Ts'o #define ext4_forget(handle, is_metadata, inode, bh, block_nr) \ 25290c7201bSTheodore Ts'o __ext4_forget(__func__, __LINE__, (handle), (is_metadata), (inode), \ 25390c7201bSTheodore Ts'o (bh), (block_nr)) 2543dcf5451SChristoph Hellwig #define ext4_journal_get_create_access(handle, bh) \ 25590c7201bSTheodore Ts'o __ext4_journal_get_create_access(__func__, __LINE__, (handle), (bh)) 2560390131bSFrank Mayhar #define ext4_handle_dirty_metadata(handle, inode, bh) \ 25790c7201bSTheodore Ts'o __ext4_handle_dirty_metadata(__func__, __LINE__, (handle), (inode), \ 25890c7201bSTheodore Ts'o (bh)) 259a0375156STheodore Ts'o #define ext4_handle_dirty_super(handle, sb) \ 260b50924c2SArtem Bityutskiy __ext4_handle_dirty_super(__func__, __LINE__, (handle), (sb)) 2613dcf5451SChristoph Hellwig 2629924a92aSTheodore Ts'o handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line, 2635fe2fe89SJan Kara int type, int blocks, int rsv_blocks); 264c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle); 2653dcf5451SChristoph Hellwig 266d3d1faf6SCurt Wohlgemuth #define EXT4_NOJOURNAL_MAX_REF_COUNT ((unsigned long) 4096) 2670390131bSFrank Mayhar 268d3d1faf6SCurt Wohlgemuth /* Note: Do not use this for NULL handles. This is only to determine if 269d3d1faf6SCurt Wohlgemuth * a properly allocated handle is using a journal or not. */ 2700390131bSFrank Mayhar static inline int ext4_handle_valid(handle_t *handle) 2710390131bSFrank Mayhar { 272d3d1faf6SCurt Wohlgemuth if ((unsigned long)handle < EXT4_NOJOURNAL_MAX_REF_COUNT) 2730390131bSFrank Mayhar return 0; 2740390131bSFrank Mayhar return 1; 2750390131bSFrank Mayhar } 2760390131bSFrank Mayhar 2770390131bSFrank Mayhar static inline void ext4_handle_sync(handle_t *handle) 2780390131bSFrank Mayhar { 2790390131bSFrank Mayhar if (ext4_handle_valid(handle)) 2800390131bSFrank Mayhar handle->h_sync = 1; 2810390131bSFrank Mayhar } 2820390131bSFrank Mayhar 2830390131bSFrank Mayhar static inline int ext4_handle_is_aborted(handle_t *handle) 2840390131bSFrank Mayhar { 2850390131bSFrank Mayhar if (ext4_handle_valid(handle)) 2860390131bSFrank Mayhar return is_handle_aborted(handle); 2870390131bSFrank Mayhar return 0; 2880390131bSFrank Mayhar } 2890390131bSFrank Mayhar 2900390131bSFrank Mayhar static inline int ext4_handle_has_enough_credits(handle_t *handle, int needed) 2910390131bSFrank Mayhar { 2920390131bSFrank Mayhar if (ext4_handle_valid(handle) && handle->h_buffer_credits < needed) 2930390131bSFrank Mayhar return 0; 2940390131bSFrank Mayhar return 1; 2950390131bSFrank Mayhar } 2960390131bSFrank Mayhar 2979924a92aSTheodore Ts'o #define ext4_journal_start_sb(sb, type, nblocks) \ 2985fe2fe89SJan Kara __ext4_journal_start_sb((sb), __LINE__, (type), (nblocks), 0) 2999924a92aSTheodore Ts'o 3009924a92aSTheodore Ts'o #define ext4_journal_start(inode, type, nblocks) \ 3015fe2fe89SJan Kara __ext4_journal_start((inode), __LINE__, (type), (nblocks), 0) 3025fe2fe89SJan Kara 3035fe2fe89SJan Kara #define ext4_journal_start_with_reserve(inode, type, blocks, rsv_blocks) \ 3045fe2fe89SJan Kara __ext4_journal_start((inode), __LINE__, (type), (blocks), (rsv_blocks)) 3059924a92aSTheodore Ts'o 3069924a92aSTheodore Ts'o static inline handle_t *__ext4_journal_start(struct inode *inode, 3079924a92aSTheodore Ts'o unsigned int line, int type, 3085fe2fe89SJan Kara int blocks, int rsv_blocks) 3093dcf5451SChristoph Hellwig { 3105fe2fe89SJan Kara return __ext4_journal_start_sb(inode->i_sb, line, type, blocks, 3115fe2fe89SJan Kara rsv_blocks); 3123dcf5451SChristoph Hellwig } 3133dcf5451SChristoph Hellwig 3143dcf5451SChristoph Hellwig #define ext4_journal_stop(handle) \ 315c398eda0STheodore Ts'o __ext4_journal_stop(__func__, __LINE__, (handle)) 3163dcf5451SChristoph Hellwig 3176b523df4SJan Kara #define ext4_journal_start_reserved(handle, type) \ 3185fe2fe89SJan Kara __ext4_journal_start_reserved((handle), __LINE__, (type)) 3195fe2fe89SJan Kara 3205fe2fe89SJan Kara handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line, 3215fe2fe89SJan Kara int type); 3225fe2fe89SJan Kara 3235fe2fe89SJan Kara static inline void ext4_journal_free_reserved(handle_t *handle) 3245fe2fe89SJan Kara { 3255fe2fe89SJan Kara if (ext4_handle_valid(handle)) 3265fe2fe89SJan Kara jbd2_journal_free_reserved(handle); 3275fe2fe89SJan Kara } 3285fe2fe89SJan Kara 3293dcf5451SChristoph Hellwig static inline handle_t *ext4_journal_current_handle(void) 3303dcf5451SChristoph Hellwig { 3313dcf5451SChristoph Hellwig return journal_current_handle(); 3323dcf5451SChristoph Hellwig } 3333dcf5451SChristoph Hellwig 3343dcf5451SChristoph Hellwig static inline int ext4_journal_extend(handle_t *handle, int nblocks) 3353dcf5451SChristoph Hellwig { 3360390131bSFrank Mayhar if (ext4_handle_valid(handle)) 3373dcf5451SChristoph Hellwig return jbd2_journal_extend(handle, nblocks); 3380390131bSFrank Mayhar return 0; 3393dcf5451SChristoph Hellwig } 3403dcf5451SChristoph Hellwig 3413dcf5451SChristoph Hellwig static inline int ext4_journal_restart(handle_t *handle, int nblocks) 3423dcf5451SChristoph Hellwig { 3430390131bSFrank Mayhar if (ext4_handle_valid(handle)) 3443dcf5451SChristoph Hellwig return jbd2_journal_restart(handle, nblocks); 3450390131bSFrank Mayhar return 0; 3463dcf5451SChristoph Hellwig } 3473dcf5451SChristoph Hellwig 3483dcf5451SChristoph Hellwig static inline int ext4_journal_blocks_per_page(struct inode *inode) 3493dcf5451SChristoph Hellwig { 3500390131bSFrank Mayhar if (EXT4_JOURNAL(inode) != NULL) 3513dcf5451SChristoph Hellwig return jbd2_journal_blocks_per_page(inode); 3520390131bSFrank Mayhar return 0; 3533dcf5451SChristoph Hellwig } 3543dcf5451SChristoph Hellwig 3553dcf5451SChristoph Hellwig static inline int ext4_journal_force_commit(journal_t *journal) 3563dcf5451SChristoph Hellwig { 3570390131bSFrank Mayhar if (journal) 3583dcf5451SChristoph Hellwig return jbd2_journal_force_commit(journal); 3590390131bSFrank Mayhar return 0; 3603dcf5451SChristoph Hellwig } 3613dcf5451SChristoph Hellwig 362678aaf48SJan Kara static inline int ext4_jbd2_file_inode(handle_t *handle, struct inode *inode) 363678aaf48SJan Kara { 3640390131bSFrank Mayhar if (ext4_handle_valid(handle)) 3658aefcd55STheodore Ts'o return jbd2_journal_file_inode(handle, EXT4_I(inode)->jinode); 3660390131bSFrank Mayhar return 0; 367678aaf48SJan Kara } 368678aaf48SJan Kara 369b436b9beSJan Kara static inline void ext4_update_inode_fsync_trans(handle_t *handle, 370b436b9beSJan Kara struct inode *inode, 371b436b9beSJan Kara int datasync) 372b436b9beSJan Kara { 373b436b9beSJan Kara struct ext4_inode_info *ei = EXT4_I(inode); 374b436b9beSJan Kara 375b436b9beSJan Kara if (ext4_handle_valid(handle)) { 376b436b9beSJan Kara ei->i_sync_tid = handle->h_transaction->t_tid; 377b436b9beSJan Kara if (datasync) 378b436b9beSJan Kara ei->i_datasync_tid = handle->h_transaction->t_tid; 379b436b9beSJan Kara } 380b436b9beSJan Kara } 381b436b9beSJan Kara 3823dcf5451SChristoph Hellwig /* super.c */ 3833dcf5451SChristoph Hellwig int ext4_force_commit(struct super_block *sb); 3843dcf5451SChristoph Hellwig 3853d2b1582SLukas Czerner /* 3863d2b1582SLukas Czerner * Ext4 inode journal modes 3873d2b1582SLukas Czerner */ 3883d2b1582SLukas Czerner #define EXT4_INODE_JOURNAL_DATA_MODE 0x01 /* journal data mode */ 3893d2b1582SLukas Czerner #define EXT4_INODE_ORDERED_DATA_MODE 0x02 /* ordered data mode */ 3903d2b1582SLukas Czerner #define EXT4_INODE_WRITEBACK_DATA_MODE 0x04 /* writeback data mode */ 3913d2b1582SLukas Czerner 3923d2b1582SLukas Czerner static inline int ext4_inode_journal_mode(struct inode *inode) 3933dcf5451SChristoph Hellwig { 3940390131bSFrank Mayhar if (EXT4_JOURNAL(inode) == NULL) 3953d2b1582SLukas Czerner return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */ 3963d2b1582SLukas Czerner /* We do not support data journalling with delayed allocation */ 3973d2b1582SLukas Czerner if (!S_ISREG(inode->i_mode) || 3983d2b1582SLukas Czerner test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 3993d2b1582SLukas Czerner return EXT4_INODE_JOURNAL_DATA_MODE; /* journal data */ 4003d2b1582SLukas Czerner if (ext4_test_inode_flag(inode, EXT4_INODE_JOURNAL_DATA) && 4013d2b1582SLukas Czerner !test_opt(inode->i_sb, DELALLOC)) 4023d2b1582SLukas Czerner return EXT4_INODE_JOURNAL_DATA_MODE; /* journal data */ 4033d2b1582SLukas Czerner if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 4043d2b1582SLukas Czerner return EXT4_INODE_ORDERED_DATA_MODE; /* ordered */ 4053d2b1582SLukas Czerner if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 4063d2b1582SLukas Czerner return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */ 4073d2b1582SLukas Czerner else 4083d2b1582SLukas Czerner BUG(); 4093d2b1582SLukas Czerner } 4103d2b1582SLukas Czerner 4113d2b1582SLukas Czerner static inline int ext4_should_journal_data(struct inode *inode) 4123d2b1582SLukas Czerner { 4133d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_JOURNAL_DATA_MODE; 4143dcf5451SChristoph Hellwig } 4153dcf5451SChristoph Hellwig 4163dcf5451SChristoph Hellwig static inline int ext4_should_order_data(struct inode *inode) 4173dcf5451SChristoph Hellwig { 4183d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_ORDERED_DATA_MODE; 4193dcf5451SChristoph Hellwig } 4203dcf5451SChristoph Hellwig 4213dcf5451SChristoph Hellwig static inline int ext4_should_writeback_data(struct inode *inode) 4223dcf5451SChristoph Hellwig { 4233d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_WRITEBACK_DATA_MODE; 4243dcf5451SChristoph Hellwig } 4253dcf5451SChristoph Hellwig 426744692dcSJiaying Zhang /* 427744692dcSJiaying Zhang * This function controls whether or not we should try to go down the 428744692dcSJiaying Zhang * dioread_nolock code paths, which makes it safe to avoid taking 429744692dcSJiaying Zhang * i_mutex for direct I/O reads. This only works for extent-based 430206f7ab4SChristoph Hellwig * files, and it doesn't work if data journaling is enabled, since the 431206f7ab4SChristoph Hellwig * dioread_nolock code uses b_private to pass information back to the 432206f7ab4SChristoph Hellwig * I/O completion handler, and this conflicts with the jbd's use of 433206f7ab4SChristoph Hellwig * b_private. 434744692dcSJiaying Zhang */ 435744692dcSJiaying Zhang static inline int ext4_should_dioread_nolock(struct inode *inode) 436744692dcSJiaying Zhang { 437744692dcSJiaying Zhang if (!test_opt(inode->i_sb, DIOREAD_NOLOCK)) 438744692dcSJiaying Zhang return 0; 439744692dcSJiaying Zhang if (!S_ISREG(inode->i_mode)) 440744692dcSJiaying Zhang return 0; 44112e9b892SDmitry Monakhov if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) 442744692dcSJiaying Zhang return 0; 443744692dcSJiaying Zhang if (ext4_should_journal_data(inode)) 444744692dcSJiaying Zhang return 0; 445744692dcSJiaying Zhang return 1; 446744692dcSJiaying Zhang } 447744692dcSJiaying Zhang 4483dcf5451SChristoph Hellwig #endif /* _EXT4_JBD2_H */ 449