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 80e08ac99fSArtem Blagodarenko /* 81e08ac99fSArtem Blagodarenko * Number of credits needed if we need to insert an entry into a 82e08ac99fSArtem Blagodarenko * directory. For each new index block, we need 4 blocks (old index 83e08ac99fSArtem Blagodarenko * block, new index block, bitmap block, bg summary). For normal 84e08ac99fSArtem Blagodarenko * htree directories there are 2 levels; if the largedir feature 85e08ac99fSArtem Blagodarenko * enabled it's 3 levels. 86e08ac99fSArtem Blagodarenko */ 87e08ac99fSArtem Blagodarenko #define EXT4_INDEX_EXTRA_TRANS_BLOCKS 12U 883dcf5451SChristoph Hellwig 893dcf5451SChristoph Hellwig #ifdef CONFIG_QUOTA 903dcf5451SChristoph Hellwig /* Amount of blocks needed for quota update - we know that the structure was 9121f97697SJan Kara * allocated so we need to update only data block */ 927c319d32SAditya Kali #define EXT4_QUOTA_TRANS_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\ 93e2b911c5SDarrick J. Wong ext4_has_feature_quota(sb)) ? 1 : 0) 943dcf5451SChristoph Hellwig /* Amount of blocks needed for quota insert/delete - we do some block writes 953dcf5451SChristoph Hellwig * but inode, sb and group updates are done only once */ 967c319d32SAditya Kali #define EXT4_QUOTA_INIT_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\ 97e2b911c5SDarrick J. Wong ext4_has_feature_quota(sb)) ?\ 987c319d32SAditya Kali (DQUOT_INIT_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\ 997c319d32SAditya Kali +3+DQUOT_INIT_REWRITE) : 0) 1005aca07ebSDmitry Monakhov 1017c319d32SAditya Kali #define EXT4_QUOTA_DEL_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\ 102e2b911c5SDarrick J. Wong ext4_has_feature_quota(sb)) ?\ 1037c319d32SAditya Kali (DQUOT_DEL_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\ 1047c319d32SAditya Kali +3+DQUOT_DEL_REWRITE) : 0) 1053dcf5451SChristoph Hellwig #else 1063dcf5451SChristoph Hellwig #define EXT4_QUOTA_TRANS_BLOCKS(sb) 0 1073dcf5451SChristoph Hellwig #define EXT4_QUOTA_INIT_BLOCKS(sb) 0 1083dcf5451SChristoph Hellwig #define EXT4_QUOTA_DEL_BLOCKS(sb) 0 1093dcf5451SChristoph Hellwig #endif 110a2d4a646SJan Kara #define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb)) 111a2d4a646SJan Kara #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb)) 112a2d4a646SJan Kara #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb)) 1133dcf5451SChristoph Hellwig 1149924a92aSTheodore Ts'o /* 1159924a92aSTheodore Ts'o * Ext4 handle operation types -- for logging purposes 1169924a92aSTheodore Ts'o */ 1179924a92aSTheodore Ts'o #define EXT4_HT_MISC 0 1189924a92aSTheodore Ts'o #define EXT4_HT_INODE 1 1199924a92aSTheodore Ts'o #define EXT4_HT_WRITE_PAGE 2 1209924a92aSTheodore Ts'o #define EXT4_HT_MAP_BLOCKS 3 1219924a92aSTheodore Ts'o #define EXT4_HT_DIR 4 1229924a92aSTheodore Ts'o #define EXT4_HT_TRUNCATE 5 1239924a92aSTheodore Ts'o #define EXT4_HT_QUOTA 6 1249924a92aSTheodore Ts'o #define EXT4_HT_RESIZE 7 1259924a92aSTheodore Ts'o #define EXT4_HT_MIGRATE 8 1269924a92aSTheodore Ts'o #define EXT4_HT_MOVE_EXTENTS 9 1279924a92aSTheodore Ts'o #define EXT4_HT_XATTR 10 1286b523df4SJan Kara #define EXT4_HT_EXT_CONVERT 11 1296b523df4SJan Kara #define EXT4_HT_MAX 12 1309924a92aSTheodore Ts'o 13118aadd47SBobi Jam /** 13218aadd47SBobi Jam * struct ext4_journal_cb_entry - Base structure for callback information. 13318aadd47SBobi Jam * 13418aadd47SBobi Jam * This struct is a 'seed' structure for a using with your own callback 13518aadd47SBobi Jam * structs. If you are using callbacks you must allocate one of these 13618aadd47SBobi Jam * or another struct of your own definition which has this struct 13718aadd47SBobi Jam * as it's first element and pass it to ext4_journal_callback_add(). 13818aadd47SBobi Jam */ 13918aadd47SBobi Jam struct ext4_journal_cb_entry { 14018aadd47SBobi Jam /* list information for other callbacks attached to the same handle */ 14118aadd47SBobi Jam struct list_head jce_list; 14218aadd47SBobi Jam 14318aadd47SBobi Jam /* Function to call with this callback structure */ 14418aadd47SBobi Jam void (*jce_func)(struct super_block *sb, 14518aadd47SBobi Jam struct ext4_journal_cb_entry *jce, int error); 14618aadd47SBobi Jam 14718aadd47SBobi Jam /* user data goes here */ 14818aadd47SBobi Jam }; 14918aadd47SBobi Jam 15018aadd47SBobi Jam /** 15118aadd47SBobi Jam * ext4_journal_callback_add: add a function to call after transaction commit 15218aadd47SBobi Jam * @handle: active journal transaction handle to register callback on 15318aadd47SBobi Jam * @func: callback function to call after the transaction has committed: 15418aadd47SBobi Jam * @sb: superblock of current filesystem for transaction 15518aadd47SBobi Jam * @jce: returned journal callback data 15618aadd47SBobi Jam * @rc: journal state at commit (0 = transaction committed properly) 15718aadd47SBobi Jam * @jce: journal callback data (internal and function private data struct) 15818aadd47SBobi Jam * 15918aadd47SBobi Jam * The registered function will be called in the context of the journal thread 16018aadd47SBobi Jam * after the transaction for which the handle was created has completed. 16118aadd47SBobi Jam * 16218aadd47SBobi Jam * No locks are held when the callback function is called, so it is safe to 16318aadd47SBobi Jam * call blocking functions from within the callback, but the callback should 16418aadd47SBobi Jam * not block or run for too long, or the filesystem will be blocked waiting for 16518aadd47SBobi Jam * the next transaction to commit. No journaling functions can be used, or 16618aadd47SBobi Jam * there is a risk of deadlock. 16718aadd47SBobi Jam * 16818aadd47SBobi Jam * There is no guaranteed calling order of multiple registered callbacks on 16918aadd47SBobi Jam * the same transaction. 17018aadd47SBobi Jam */ 171d08854f5STheodore Ts'o static inline void _ext4_journal_callback_add(handle_t *handle, 172d08854f5STheodore Ts'o struct ext4_journal_cb_entry *jce) 173d08854f5STheodore Ts'o { 174d08854f5STheodore Ts'o /* Add the jce to transaction's private list */ 175d08854f5STheodore Ts'o list_add_tail(&jce->jce_list, &handle->h_transaction->t_private_list); 176d08854f5STheodore Ts'o } 177d08854f5STheodore Ts'o 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); 190d08854f5STheodore Ts'o _ext4_journal_callback_add(handle, jce); 19118aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 19218aadd47SBobi Jam } 19318aadd47SBobi Jam 194d08854f5STheodore Ts'o 19518aadd47SBobi Jam /** 19618aadd47SBobi Jam * ext4_journal_callback_del: delete a registered callback 19718aadd47SBobi Jam * @handle: active journal transaction handle on which callback was registered 19818aadd47SBobi Jam * @jce: registered journal callback entry to unregister 19970261f56SAnatol Pomozov * Return true if object was successfully removed 20018aadd47SBobi Jam */ 2015d3ee208SDmitry Monakhov static inline bool ext4_journal_callback_try_del(handle_t *handle, 20218aadd47SBobi Jam struct ext4_journal_cb_entry *jce) 20318aadd47SBobi Jam { 2045d3ee208SDmitry Monakhov bool deleted; 20518aadd47SBobi Jam struct ext4_sb_info *sbi = 20618aadd47SBobi Jam EXT4_SB(handle->h_transaction->t_journal->j_private); 20718aadd47SBobi Jam 20818aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 2095d3ee208SDmitry Monakhov deleted = !list_empty(&jce->jce_list); 21018aadd47SBobi Jam list_del_init(&jce->jce_list); 21118aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 2125d3ee208SDmitry Monakhov return deleted; 21318aadd47SBobi Jam } 21418aadd47SBobi Jam 2153dcf5451SChristoph Hellwig int 2163dcf5451SChristoph Hellwig ext4_mark_iloc_dirty(handle_t *handle, 2173dcf5451SChristoph Hellwig struct inode *inode, 2183dcf5451SChristoph Hellwig struct ext4_iloc *iloc); 2193dcf5451SChristoph Hellwig 2203dcf5451SChristoph Hellwig /* 2213dcf5451SChristoph Hellwig * On success, We end up with an outstanding reference count against 2223dcf5451SChristoph Hellwig * iloc->bh. This _must_ be cleaned up later. 2233dcf5451SChristoph Hellwig */ 2243dcf5451SChristoph Hellwig 2253dcf5451SChristoph Hellwig int ext4_reserve_inode_write(handle_t *handle, struct inode *inode, 2263dcf5451SChristoph Hellwig struct ext4_iloc *iloc); 2273dcf5451SChristoph Hellwig 2283dcf5451SChristoph Hellwig int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode); 2293dcf5451SChristoph Hellwig 230c03b45b8SMiao Xie int ext4_expand_extra_isize(struct inode *inode, 231c03b45b8SMiao Xie unsigned int new_extra_isize, 232c03b45b8SMiao Xie struct ext4_iloc *iloc); 2333dcf5451SChristoph Hellwig /* 234e4684b3fSTheodore Ts'o * Wrapper functions with which ext4 calls into JBD. 2353dcf5451SChristoph Hellwig */ 23690c7201bSTheodore Ts'o int __ext4_journal_get_write_access(const char *where, unsigned int line, 23790c7201bSTheodore Ts'o handle_t *handle, struct buffer_head *bh); 2383dcf5451SChristoph Hellwig 23990c7201bSTheodore Ts'o int __ext4_forget(const char *where, unsigned int line, handle_t *handle, 24090c7201bSTheodore Ts'o int is_metadata, struct inode *inode, 24190c7201bSTheodore Ts'o struct buffer_head *bh, ext4_fsblk_t blocknr); 24290c7201bSTheodore Ts'o 24390c7201bSTheodore Ts'o int __ext4_journal_get_create_access(const char *where, unsigned int line, 24490c7201bSTheodore Ts'o handle_t *handle, struct buffer_head *bh); 24590c7201bSTheodore Ts'o 24690c7201bSTheodore Ts'o int __ext4_handle_dirty_metadata(const char *where, unsigned int line, 24790c7201bSTheodore Ts'o handle_t *handle, struct inode *inode, 24890c7201bSTheodore Ts'o struct buffer_head *bh); 24990c7201bSTheodore Ts'o 25090c7201bSTheodore Ts'o int __ext4_handle_dirty_super(const char *where, unsigned int line, 251b50924c2SArtem Bityutskiy handle_t *handle, struct super_block *sb); 252a0375156STheodore Ts'o 2533dcf5451SChristoph Hellwig #define ext4_journal_get_write_access(handle, bh) \ 25490c7201bSTheodore Ts'o __ext4_journal_get_write_access(__func__, __LINE__, (handle), (bh)) 255d6797d14STheodore Ts'o #define ext4_forget(handle, is_metadata, inode, bh, block_nr) \ 25690c7201bSTheodore Ts'o __ext4_forget(__func__, __LINE__, (handle), (is_metadata), (inode), \ 25790c7201bSTheodore Ts'o (bh), (block_nr)) 2583dcf5451SChristoph Hellwig #define ext4_journal_get_create_access(handle, bh) \ 25990c7201bSTheodore Ts'o __ext4_journal_get_create_access(__func__, __LINE__, (handle), (bh)) 2600390131bSFrank Mayhar #define ext4_handle_dirty_metadata(handle, inode, bh) \ 26190c7201bSTheodore Ts'o __ext4_handle_dirty_metadata(__func__, __LINE__, (handle), (inode), \ 26290c7201bSTheodore Ts'o (bh)) 263a0375156STheodore Ts'o #define ext4_handle_dirty_super(handle, sb) \ 264b50924c2SArtem Bityutskiy __ext4_handle_dirty_super(__func__, __LINE__, (handle), (sb)) 2653dcf5451SChristoph Hellwig 2669924a92aSTheodore Ts'o handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line, 2675fe2fe89SJan Kara int type, int blocks, int rsv_blocks); 268c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle); 2693dcf5451SChristoph Hellwig 270d3d1faf6SCurt Wohlgemuth #define EXT4_NOJOURNAL_MAX_REF_COUNT ((unsigned long) 4096) 2710390131bSFrank Mayhar 272d3d1faf6SCurt Wohlgemuth /* Note: Do not use this for NULL handles. This is only to determine if 273d3d1faf6SCurt Wohlgemuth * a properly allocated handle is using a journal or not. */ 2740390131bSFrank Mayhar static inline int ext4_handle_valid(handle_t *handle) 2750390131bSFrank Mayhar { 276d3d1faf6SCurt Wohlgemuth if ((unsigned long)handle < EXT4_NOJOURNAL_MAX_REF_COUNT) 2770390131bSFrank Mayhar return 0; 2780390131bSFrank Mayhar return 1; 2790390131bSFrank Mayhar } 2800390131bSFrank Mayhar 2810390131bSFrank Mayhar static inline void ext4_handle_sync(handle_t *handle) 2820390131bSFrank Mayhar { 2830390131bSFrank Mayhar if (ext4_handle_valid(handle)) 2840390131bSFrank Mayhar handle->h_sync = 1; 2850390131bSFrank Mayhar } 2860390131bSFrank Mayhar 2870390131bSFrank Mayhar static inline int ext4_handle_is_aborted(handle_t *handle) 2880390131bSFrank Mayhar { 2890390131bSFrank Mayhar if (ext4_handle_valid(handle)) 2900390131bSFrank Mayhar return is_handle_aborted(handle); 2910390131bSFrank Mayhar return 0; 2920390131bSFrank Mayhar } 2930390131bSFrank Mayhar 2940390131bSFrank Mayhar static inline int ext4_handle_has_enough_credits(handle_t *handle, int needed) 2950390131bSFrank Mayhar { 2960390131bSFrank Mayhar if (ext4_handle_valid(handle) && handle->h_buffer_credits < needed) 2970390131bSFrank Mayhar return 0; 2980390131bSFrank Mayhar return 1; 2990390131bSFrank Mayhar } 3000390131bSFrank Mayhar 3019924a92aSTheodore Ts'o #define ext4_journal_start_sb(sb, type, nblocks) \ 3025fe2fe89SJan Kara __ext4_journal_start_sb((sb), __LINE__, (type), (nblocks), 0) 3039924a92aSTheodore Ts'o 3049924a92aSTheodore Ts'o #define ext4_journal_start(inode, type, nblocks) \ 3055fe2fe89SJan Kara __ext4_journal_start((inode), __LINE__, (type), (nblocks), 0) 3065fe2fe89SJan Kara 3075fe2fe89SJan Kara #define ext4_journal_start_with_reserve(inode, type, blocks, rsv_blocks) \ 3085fe2fe89SJan Kara __ext4_journal_start((inode), __LINE__, (type), (blocks), (rsv_blocks)) 3099924a92aSTheodore Ts'o 3109924a92aSTheodore Ts'o static inline handle_t *__ext4_journal_start(struct inode *inode, 3119924a92aSTheodore Ts'o unsigned int line, int type, 3125fe2fe89SJan Kara int blocks, int rsv_blocks) 3133dcf5451SChristoph Hellwig { 3145fe2fe89SJan Kara return __ext4_journal_start_sb(inode->i_sb, line, type, blocks, 3155fe2fe89SJan Kara rsv_blocks); 3163dcf5451SChristoph Hellwig } 3173dcf5451SChristoph Hellwig 3183dcf5451SChristoph Hellwig #define ext4_journal_stop(handle) \ 319c398eda0STheodore Ts'o __ext4_journal_stop(__func__, __LINE__, (handle)) 3203dcf5451SChristoph Hellwig 3216b523df4SJan Kara #define ext4_journal_start_reserved(handle, type) \ 3225fe2fe89SJan Kara __ext4_journal_start_reserved((handle), __LINE__, (type)) 3235fe2fe89SJan Kara 3245fe2fe89SJan Kara handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line, 3255fe2fe89SJan Kara int type); 3265fe2fe89SJan Kara 3275fe2fe89SJan Kara static inline void ext4_journal_free_reserved(handle_t *handle) 3285fe2fe89SJan Kara { 3295fe2fe89SJan Kara if (ext4_handle_valid(handle)) 3305fe2fe89SJan Kara jbd2_journal_free_reserved(handle); 3315fe2fe89SJan Kara } 3325fe2fe89SJan Kara 3333dcf5451SChristoph Hellwig static inline handle_t *ext4_journal_current_handle(void) 3343dcf5451SChristoph Hellwig { 3353dcf5451SChristoph Hellwig return journal_current_handle(); 3363dcf5451SChristoph Hellwig } 3373dcf5451SChristoph Hellwig 3383dcf5451SChristoph Hellwig static inline int ext4_journal_extend(handle_t *handle, int nblocks) 3393dcf5451SChristoph Hellwig { 3400390131bSFrank Mayhar if (ext4_handle_valid(handle)) 3413dcf5451SChristoph Hellwig return jbd2_journal_extend(handle, nblocks); 3420390131bSFrank Mayhar return 0; 3433dcf5451SChristoph Hellwig } 3443dcf5451SChristoph Hellwig 3453dcf5451SChristoph Hellwig static inline int ext4_journal_restart(handle_t *handle, int nblocks) 3463dcf5451SChristoph Hellwig { 3470390131bSFrank Mayhar if (ext4_handle_valid(handle)) 3483dcf5451SChristoph Hellwig return jbd2_journal_restart(handle, nblocks); 3490390131bSFrank Mayhar return 0; 3503dcf5451SChristoph Hellwig } 3513dcf5451SChristoph Hellwig 3523dcf5451SChristoph Hellwig static inline int ext4_journal_blocks_per_page(struct inode *inode) 3533dcf5451SChristoph Hellwig { 3540390131bSFrank Mayhar if (EXT4_JOURNAL(inode) != NULL) 3553dcf5451SChristoph Hellwig return jbd2_journal_blocks_per_page(inode); 3560390131bSFrank Mayhar return 0; 3573dcf5451SChristoph Hellwig } 3583dcf5451SChristoph Hellwig 3593dcf5451SChristoph Hellwig static inline int ext4_journal_force_commit(journal_t *journal) 3603dcf5451SChristoph Hellwig { 3610390131bSFrank Mayhar if (journal) 3623dcf5451SChristoph Hellwig return jbd2_journal_force_commit(journal); 3630390131bSFrank Mayhar return 0; 3643dcf5451SChristoph Hellwig } 3653dcf5451SChristoph Hellwig 366ee0876bcSJan Kara static inline int ext4_jbd2_inode_add_write(handle_t *handle, 367ee0876bcSJan Kara struct inode *inode) 368678aaf48SJan Kara { 3690390131bSFrank Mayhar if (ext4_handle_valid(handle)) 37041617e1aSJan Kara return jbd2_journal_inode_add_write(handle, 37141617e1aSJan Kara EXT4_I(inode)->jinode); 3720390131bSFrank Mayhar return 0; 373678aaf48SJan Kara } 374678aaf48SJan Kara 375ee0876bcSJan Kara static inline int ext4_jbd2_inode_add_wait(handle_t *handle, 376ee0876bcSJan Kara struct inode *inode) 377ee0876bcSJan Kara { 378ee0876bcSJan Kara if (ext4_handle_valid(handle)) 379ee0876bcSJan Kara return jbd2_journal_inode_add_wait(handle, 380ee0876bcSJan Kara EXT4_I(inode)->jinode); 381ee0876bcSJan Kara return 0; 382ee0876bcSJan Kara } 383ee0876bcSJan Kara 384b436b9beSJan Kara static inline void ext4_update_inode_fsync_trans(handle_t *handle, 385b436b9beSJan Kara struct inode *inode, 386b436b9beSJan Kara int datasync) 387b436b9beSJan Kara { 388b436b9beSJan Kara struct ext4_inode_info *ei = EXT4_I(inode); 389b436b9beSJan Kara 390b436b9beSJan Kara if (ext4_handle_valid(handle)) { 391b436b9beSJan Kara ei->i_sync_tid = handle->h_transaction->t_tid; 392b436b9beSJan Kara if (datasync) 393b436b9beSJan Kara ei->i_datasync_tid = handle->h_transaction->t_tid; 394b436b9beSJan Kara } 395b436b9beSJan Kara } 396b436b9beSJan Kara 3973dcf5451SChristoph Hellwig /* super.c */ 3983dcf5451SChristoph Hellwig int ext4_force_commit(struct super_block *sb); 3993dcf5451SChristoph Hellwig 4003d2b1582SLukas Czerner /* 4013d2b1582SLukas Czerner * Ext4 inode journal modes 4023d2b1582SLukas Czerner */ 4033d2b1582SLukas Czerner #define EXT4_INODE_JOURNAL_DATA_MODE 0x01 /* journal data mode */ 4043d2b1582SLukas Czerner #define EXT4_INODE_ORDERED_DATA_MODE 0x02 /* ordered data mode */ 4053d2b1582SLukas Czerner #define EXT4_INODE_WRITEBACK_DATA_MODE 0x04 /* writeback data mode */ 4063d2b1582SLukas Czerner 4073d2b1582SLukas Czerner static inline int ext4_inode_journal_mode(struct inode *inode) 4083dcf5451SChristoph Hellwig { 4090390131bSFrank Mayhar if (EXT4_JOURNAL(inode) == NULL) 4103d2b1582SLukas Czerner return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */ 4113d2b1582SLukas Czerner /* We do not support data journalling with delayed allocation */ 4123d2b1582SLukas Czerner if (!S_ISREG(inode->i_mode) || 41373b92a2aSSergey Karamov test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA || 41473b92a2aSSergey Karamov (ext4_test_inode_flag(inode, EXT4_INODE_JOURNAL_DATA) && 41573b92a2aSSergey Karamov !test_opt(inode->i_sb, DELALLOC))) { 41673b92a2aSSergey Karamov /* We do not support data journalling for encrypted data */ 41773b92a2aSSergey Karamov if (S_ISREG(inode->i_mode) && ext4_encrypted_inode(inode)) 41873b92a2aSSergey Karamov return EXT4_INODE_ORDERED_DATA_MODE; /* ordered */ 4193d2b1582SLukas Czerner return EXT4_INODE_JOURNAL_DATA_MODE; /* journal data */ 42073b92a2aSSergey Karamov } 4213d2b1582SLukas Czerner if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 4223d2b1582SLukas Czerner return EXT4_INODE_ORDERED_DATA_MODE; /* ordered */ 4233d2b1582SLukas Czerner if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 4243d2b1582SLukas Czerner return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */ 4253d2b1582SLukas Czerner BUG(); 4263d2b1582SLukas Czerner } 4273d2b1582SLukas Czerner 4283d2b1582SLukas Czerner static inline int ext4_should_journal_data(struct inode *inode) 4293d2b1582SLukas Czerner { 4303d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_JOURNAL_DATA_MODE; 4313dcf5451SChristoph Hellwig } 4323dcf5451SChristoph Hellwig 4333dcf5451SChristoph Hellwig static inline int ext4_should_order_data(struct inode *inode) 4343dcf5451SChristoph Hellwig { 4353d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_ORDERED_DATA_MODE; 4363dcf5451SChristoph Hellwig } 4373dcf5451SChristoph Hellwig 4383dcf5451SChristoph Hellwig static inline int ext4_should_writeback_data(struct inode *inode) 4393dcf5451SChristoph Hellwig { 4403d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_WRITEBACK_DATA_MODE; 4413dcf5451SChristoph Hellwig } 4423dcf5451SChristoph Hellwig 443744692dcSJiaying Zhang /* 444744692dcSJiaying Zhang * This function controls whether or not we should try to go down the 445744692dcSJiaying Zhang * dioread_nolock code paths, which makes it safe to avoid taking 446744692dcSJiaying Zhang * i_mutex for direct I/O reads. This only works for extent-based 447206f7ab4SChristoph Hellwig * files, and it doesn't work if data journaling is enabled, since the 448206f7ab4SChristoph Hellwig * dioread_nolock code uses b_private to pass information back to the 449206f7ab4SChristoph Hellwig * I/O completion handler, and this conflicts with the jbd's use of 450206f7ab4SChristoph Hellwig * b_private. 451744692dcSJiaying Zhang */ 452744692dcSJiaying Zhang static inline int ext4_should_dioread_nolock(struct inode *inode) 453744692dcSJiaying Zhang { 454744692dcSJiaying Zhang if (!test_opt(inode->i_sb, DIOREAD_NOLOCK)) 455744692dcSJiaying Zhang return 0; 456744692dcSJiaying Zhang if (!S_ISREG(inode->i_mode)) 457744692dcSJiaying Zhang return 0; 45812e9b892SDmitry Monakhov if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) 459744692dcSJiaying Zhang return 0; 460744692dcSJiaying Zhang if (ext4_should_journal_data(inode)) 461744692dcSJiaying Zhang return 0; 462744692dcSJiaying Zhang return 1; 463744692dcSJiaying Zhang } 464744692dcSJiaying Zhang 4653dcf5451SChristoph Hellwig #endif /* _EXT4_JBD2_H */ 466