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 323dcf5451SChristoph Hellwig * 5 levels of tree + root which are stored in the inode. */ 333dcf5451SChristoph Hellwig 343dcf5451SChristoph Hellwig #define EXT4_SINGLEDATA_TRANS_BLOCKS(sb) \ 353dcf5451SChristoph Hellwig (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS) \ 3683982b6fSTheodore Ts'o ? 27U : 8U) 373dcf5451SChristoph Hellwig 383dcf5451SChristoph Hellwig /* Extended attribute operations touch at most two data buffers, 393dcf5451SChristoph Hellwig * two bitmap buffers, and two group summaries, in addition to the inode 403dcf5451SChristoph Hellwig * and the superblock, which are already accounted for. */ 413dcf5451SChristoph Hellwig 423dcf5451SChristoph Hellwig #define EXT4_XATTR_TRANS_BLOCKS 6U 433dcf5451SChristoph Hellwig 443dcf5451SChristoph Hellwig /* Define the minimum size for a transaction which modifies data. This 453dcf5451SChristoph Hellwig * needs to take into account the fact that we may end up modifying two 463dcf5451SChristoph Hellwig * quota files too (one for the group, one for the user quota). The 473dcf5451SChristoph Hellwig * superblock only gets updated once, of course, so don't bother 483dcf5451SChristoph Hellwig * counting that again for the quota updates. */ 493dcf5451SChristoph Hellwig 503dcf5451SChristoph Hellwig #define EXT4_DATA_TRANS_BLOCKS(sb) (EXT4_SINGLEDATA_TRANS_BLOCKS(sb) + \ 513dcf5451SChristoph Hellwig EXT4_XATTR_TRANS_BLOCKS - 2 + \ 525aca07ebSDmitry Monakhov EXT4_MAXQUOTAS_TRANS_BLOCKS(sb)) 533dcf5451SChristoph Hellwig 54a02908f1SMingming Cao /* 55a02908f1SMingming Cao * Define the number of metadata blocks we need to account to modify data. 56a02908f1SMingming Cao * 57a02908f1SMingming Cao * This include super block, inode block, quota blocks and xattr blocks 58a02908f1SMingming Cao */ 59a02908f1SMingming Cao #define EXT4_META_TRANS_BLOCKS(sb) (EXT4_XATTR_TRANS_BLOCKS + \ 605aca07ebSDmitry Monakhov EXT4_MAXQUOTAS_TRANS_BLOCKS(sb)) 61a02908f1SMingming Cao 623dcf5451SChristoph Hellwig /* Delete operations potentially hit one directory's namespace plus an 633dcf5451SChristoph Hellwig * entire inode, plus arbitrary amounts of bitmap/indirection data. Be 643dcf5451SChristoph Hellwig * generous. We can grow the delete transaction later if necessary. */ 653dcf5451SChristoph Hellwig 663dcf5451SChristoph Hellwig #define EXT4_DELETE_TRANS_BLOCKS(sb) (2 * EXT4_DATA_TRANS_BLOCKS(sb) + 64) 673dcf5451SChristoph Hellwig 683dcf5451SChristoph Hellwig /* Define an arbitrary limit for the amount of data we will anticipate 693dcf5451SChristoph Hellwig * writing to any given transaction. For unbounded transactions such as 703dcf5451SChristoph Hellwig * write(2) and truncate(2) we can write more than this, but we always 713dcf5451SChristoph Hellwig * start off at the maximum transaction size and grow the transaction 723dcf5451SChristoph Hellwig * optimistically as we go. */ 733dcf5451SChristoph Hellwig 743dcf5451SChristoph Hellwig #define EXT4_MAX_TRANS_DATA 64U 753dcf5451SChristoph Hellwig 763dcf5451SChristoph Hellwig /* We break up a large truncate or write transaction once the handle's 773dcf5451SChristoph Hellwig * buffer credits gets this low, we need either to extend the 783dcf5451SChristoph Hellwig * transaction or to start a new one. Reserve enough space here for 793dcf5451SChristoph Hellwig * inode, bitmap, superblock, group and indirection updates for at least 803dcf5451SChristoph Hellwig * one block, plus two quota updates. Quota allocations are not 813dcf5451SChristoph Hellwig * needed. */ 823dcf5451SChristoph Hellwig 833dcf5451SChristoph Hellwig #define EXT4_RESERVE_TRANS_BLOCKS 12U 843dcf5451SChristoph Hellwig 853dcf5451SChristoph Hellwig #define EXT4_INDEX_EXTRA_TRANS_BLOCKS 8 863dcf5451SChristoph Hellwig 873dcf5451SChristoph Hellwig #ifdef CONFIG_QUOTA 883dcf5451SChristoph Hellwig /* Amount of blocks needed for quota update - we know that the structure was 8921f97697SJan Kara * allocated so we need to update only data block */ 907c319d32SAditya Kali #define EXT4_QUOTA_TRANS_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\ 917c319d32SAditya Kali EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) ?\ 927c319d32SAditya Kali 1 : 0) 933dcf5451SChristoph Hellwig /* Amount of blocks needed for quota insert/delete - we do some block writes 943dcf5451SChristoph Hellwig * but inode, sb and group updates are done only once */ 957c319d32SAditya Kali #define EXT4_QUOTA_INIT_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\ 967c319d32SAditya Kali EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) ?\ 977c319d32SAditya Kali (DQUOT_INIT_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\ 987c319d32SAditya Kali +3+DQUOT_INIT_REWRITE) : 0) 995aca07ebSDmitry Monakhov 1007c319d32SAditya Kali #define EXT4_QUOTA_DEL_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\ 1017c319d32SAditya Kali EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) ?\ 1027c319d32SAditya Kali (DQUOT_DEL_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\ 1037c319d32SAditya Kali +3+DQUOT_DEL_REWRITE) : 0) 1043dcf5451SChristoph Hellwig #else 1053dcf5451SChristoph Hellwig #define EXT4_QUOTA_TRANS_BLOCKS(sb) 0 1063dcf5451SChristoph Hellwig #define EXT4_QUOTA_INIT_BLOCKS(sb) 0 1073dcf5451SChristoph Hellwig #define EXT4_QUOTA_DEL_BLOCKS(sb) 0 1083dcf5451SChristoph Hellwig #endif 1095aca07ebSDmitry Monakhov #define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb)) 1105aca07ebSDmitry Monakhov #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb)) 1115aca07ebSDmitry Monakhov #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb)) 1123dcf5451SChristoph Hellwig 1139924a92aSTheodore Ts'o /* 1149924a92aSTheodore Ts'o * Ext4 handle operation types -- for logging purposes 1159924a92aSTheodore Ts'o */ 1169924a92aSTheodore Ts'o #define EXT4_HT_MISC 0 1179924a92aSTheodore Ts'o #define EXT4_HT_INODE 1 1189924a92aSTheodore Ts'o #define EXT4_HT_WRITE_PAGE 2 1199924a92aSTheodore Ts'o #define EXT4_HT_MAP_BLOCKS 3 1209924a92aSTheodore Ts'o #define EXT4_HT_DIR 4 1219924a92aSTheodore Ts'o #define EXT4_HT_TRUNCATE 5 1229924a92aSTheodore Ts'o #define EXT4_HT_QUOTA 6 1239924a92aSTheodore Ts'o #define EXT4_HT_RESIZE 7 1249924a92aSTheodore Ts'o #define EXT4_HT_MIGRATE 8 1259924a92aSTheodore Ts'o #define EXT4_HT_MOVE_EXTENTS 9 1269924a92aSTheodore Ts'o #define EXT4_HT_XATTR 10 1279924a92aSTheodore Ts'o #define EXT4_HT_MAX 11 1289924a92aSTheodore Ts'o 12918aadd47SBobi Jam /** 13018aadd47SBobi Jam * struct ext4_journal_cb_entry - Base structure for callback information. 13118aadd47SBobi Jam * 13218aadd47SBobi Jam * This struct is a 'seed' structure for a using with your own callback 13318aadd47SBobi Jam * structs. If you are using callbacks you must allocate one of these 13418aadd47SBobi Jam * or another struct of your own definition which has this struct 13518aadd47SBobi Jam * as it's first element and pass it to ext4_journal_callback_add(). 13618aadd47SBobi Jam */ 13718aadd47SBobi Jam struct ext4_journal_cb_entry { 13818aadd47SBobi Jam /* list information for other callbacks attached to the same handle */ 13918aadd47SBobi Jam struct list_head jce_list; 14018aadd47SBobi Jam 14118aadd47SBobi Jam /* Function to call with this callback structure */ 14218aadd47SBobi Jam void (*jce_func)(struct super_block *sb, 14318aadd47SBobi Jam struct ext4_journal_cb_entry *jce, int error); 14418aadd47SBobi Jam 14518aadd47SBobi Jam /* user data goes here */ 14618aadd47SBobi Jam }; 14718aadd47SBobi Jam 14818aadd47SBobi Jam /** 14918aadd47SBobi Jam * ext4_journal_callback_add: add a function to call after transaction commit 15018aadd47SBobi Jam * @handle: active journal transaction handle to register callback on 15118aadd47SBobi Jam * @func: callback function to call after the transaction has committed: 15218aadd47SBobi Jam * @sb: superblock of current filesystem for transaction 15318aadd47SBobi Jam * @jce: returned journal callback data 15418aadd47SBobi Jam * @rc: journal state at commit (0 = transaction committed properly) 15518aadd47SBobi Jam * @jce: journal callback data (internal and function private data struct) 15618aadd47SBobi Jam * 15718aadd47SBobi Jam * The registered function will be called in the context of the journal thread 15818aadd47SBobi Jam * after the transaction for which the handle was created has completed. 15918aadd47SBobi Jam * 16018aadd47SBobi Jam * No locks are held when the callback function is called, so it is safe to 16118aadd47SBobi Jam * call blocking functions from within the callback, but the callback should 16218aadd47SBobi Jam * not block or run for too long, or the filesystem will be blocked waiting for 16318aadd47SBobi Jam * the next transaction to commit. No journaling functions can be used, or 16418aadd47SBobi Jam * there is a risk of deadlock. 16518aadd47SBobi Jam * 16618aadd47SBobi Jam * There is no guaranteed calling order of multiple registered callbacks on 16718aadd47SBobi Jam * the same transaction. 16818aadd47SBobi Jam */ 16918aadd47SBobi Jam static inline void ext4_journal_callback_add(handle_t *handle, 17018aadd47SBobi Jam void (*func)(struct super_block *sb, 17118aadd47SBobi Jam struct ext4_journal_cb_entry *jce, 17218aadd47SBobi Jam int rc), 17318aadd47SBobi Jam struct ext4_journal_cb_entry *jce) 17418aadd47SBobi Jam { 17518aadd47SBobi Jam struct ext4_sb_info *sbi = 17618aadd47SBobi Jam EXT4_SB(handle->h_transaction->t_journal->j_private); 17718aadd47SBobi Jam 17818aadd47SBobi Jam /* Add the jce to transaction's private list */ 17918aadd47SBobi Jam jce->jce_func = func; 18018aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 18118aadd47SBobi Jam list_add_tail(&jce->jce_list, &handle->h_transaction->t_private_list); 18218aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 18318aadd47SBobi Jam } 18418aadd47SBobi Jam 18518aadd47SBobi Jam /** 18618aadd47SBobi Jam * ext4_journal_callback_del: delete a registered callback 18718aadd47SBobi Jam * @handle: active journal transaction handle on which callback was registered 18818aadd47SBobi Jam * @jce: registered journal callback entry to unregister 18918aadd47SBobi Jam */ 19018aadd47SBobi Jam static inline void ext4_journal_callback_del(handle_t *handle, 19118aadd47SBobi Jam struct ext4_journal_cb_entry *jce) 19218aadd47SBobi Jam { 19318aadd47SBobi Jam struct ext4_sb_info *sbi = 19418aadd47SBobi Jam EXT4_SB(handle->h_transaction->t_journal->j_private); 19518aadd47SBobi Jam 19618aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 19718aadd47SBobi Jam list_del_init(&jce->jce_list); 19818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 19918aadd47SBobi Jam } 20018aadd47SBobi Jam 2013dcf5451SChristoph Hellwig int 2023dcf5451SChristoph Hellwig ext4_mark_iloc_dirty(handle_t *handle, 2033dcf5451SChristoph Hellwig struct inode *inode, 2043dcf5451SChristoph Hellwig struct ext4_iloc *iloc); 2053dcf5451SChristoph Hellwig 2063dcf5451SChristoph Hellwig /* 2073dcf5451SChristoph Hellwig * On success, We end up with an outstanding reference count against 2083dcf5451SChristoph Hellwig * iloc->bh. This _must_ be cleaned up later. 2093dcf5451SChristoph Hellwig */ 2103dcf5451SChristoph Hellwig 2113dcf5451SChristoph Hellwig int ext4_reserve_inode_write(handle_t *handle, struct inode *inode, 2123dcf5451SChristoph Hellwig struct ext4_iloc *iloc); 2133dcf5451SChristoph Hellwig 2143dcf5451SChristoph Hellwig int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode); 2153dcf5451SChristoph Hellwig 2163dcf5451SChristoph Hellwig /* 217e4684b3fSTheodore Ts'o * Wrapper functions with which ext4 calls into JBD. 2183dcf5451SChristoph Hellwig */ 21990c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 22090c7201bSTheodore Ts'o const char *err_fn, 2213dcf5451SChristoph Hellwig struct buffer_head *bh, handle_t *handle, int err); 2223dcf5451SChristoph Hellwig 22390c7201bSTheodore Ts'o int __ext4_journal_get_write_access(const char *where, unsigned int line, 22490c7201bSTheodore Ts'o handle_t *handle, struct buffer_head *bh); 2253dcf5451SChristoph Hellwig 22690c7201bSTheodore Ts'o int __ext4_forget(const char *where, unsigned int line, handle_t *handle, 22790c7201bSTheodore Ts'o int is_metadata, struct inode *inode, 22890c7201bSTheodore Ts'o struct buffer_head *bh, ext4_fsblk_t blocknr); 22990c7201bSTheodore Ts'o 23090c7201bSTheodore Ts'o int __ext4_journal_get_create_access(const char *where, unsigned int line, 23190c7201bSTheodore Ts'o handle_t *handle, struct buffer_head *bh); 23290c7201bSTheodore Ts'o 23390c7201bSTheodore Ts'o int __ext4_handle_dirty_metadata(const char *where, unsigned int line, 23490c7201bSTheodore Ts'o handle_t *handle, struct inode *inode, 23590c7201bSTheodore Ts'o struct buffer_head *bh); 23690c7201bSTheodore Ts'o 23790c7201bSTheodore Ts'o int __ext4_handle_dirty_super(const char *where, unsigned int line, 238b50924c2SArtem Bityutskiy handle_t *handle, struct super_block *sb); 239a0375156STheodore Ts'o 2403dcf5451SChristoph Hellwig #define ext4_journal_get_write_access(handle, bh) \ 24190c7201bSTheodore Ts'o __ext4_journal_get_write_access(__func__, __LINE__, (handle), (bh)) 242d6797d14STheodore Ts'o #define ext4_forget(handle, is_metadata, inode, bh, block_nr) \ 24390c7201bSTheodore Ts'o __ext4_forget(__func__, __LINE__, (handle), (is_metadata), (inode), \ 24490c7201bSTheodore Ts'o (bh), (block_nr)) 2453dcf5451SChristoph Hellwig #define ext4_journal_get_create_access(handle, bh) \ 24690c7201bSTheodore Ts'o __ext4_journal_get_create_access(__func__, __LINE__, (handle), (bh)) 2470390131bSFrank Mayhar #define ext4_handle_dirty_metadata(handle, inode, bh) \ 24890c7201bSTheodore Ts'o __ext4_handle_dirty_metadata(__func__, __LINE__, (handle), (inode), \ 24990c7201bSTheodore Ts'o (bh)) 250a0375156STheodore Ts'o #define ext4_handle_dirty_super(handle, sb) \ 251b50924c2SArtem Bityutskiy __ext4_handle_dirty_super(__func__, __LINE__, (handle), (sb)) 2523dcf5451SChristoph Hellwig 2539924a92aSTheodore Ts'o handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line, 2549924a92aSTheodore Ts'o int type, int nblocks); 255c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle); 2563dcf5451SChristoph Hellwig 257d3d1faf6SCurt Wohlgemuth #define EXT4_NOJOURNAL_MAX_REF_COUNT ((unsigned long) 4096) 2580390131bSFrank Mayhar 259d3d1faf6SCurt Wohlgemuth /* Note: Do not use this for NULL handles. This is only to determine if 260d3d1faf6SCurt Wohlgemuth * a properly allocated handle is using a journal or not. */ 2610390131bSFrank Mayhar static inline int ext4_handle_valid(handle_t *handle) 2620390131bSFrank Mayhar { 263d3d1faf6SCurt Wohlgemuth if ((unsigned long)handle < EXT4_NOJOURNAL_MAX_REF_COUNT) 2640390131bSFrank Mayhar return 0; 2650390131bSFrank Mayhar return 1; 2660390131bSFrank Mayhar } 2670390131bSFrank Mayhar 2680390131bSFrank Mayhar static inline void ext4_handle_sync(handle_t *handle) 2690390131bSFrank Mayhar { 2700390131bSFrank Mayhar if (ext4_handle_valid(handle)) 2710390131bSFrank Mayhar handle->h_sync = 1; 2720390131bSFrank Mayhar } 2730390131bSFrank Mayhar 2740390131bSFrank Mayhar static inline int ext4_handle_is_aborted(handle_t *handle) 2750390131bSFrank Mayhar { 2760390131bSFrank Mayhar if (ext4_handle_valid(handle)) 2770390131bSFrank Mayhar return is_handle_aborted(handle); 2780390131bSFrank Mayhar return 0; 2790390131bSFrank Mayhar } 2800390131bSFrank Mayhar 2810390131bSFrank Mayhar static inline int ext4_handle_has_enough_credits(handle_t *handle, int needed) 2820390131bSFrank Mayhar { 2830390131bSFrank Mayhar if (ext4_handle_valid(handle) && handle->h_buffer_credits < needed) 2840390131bSFrank Mayhar return 0; 2850390131bSFrank Mayhar return 1; 2860390131bSFrank Mayhar } 2870390131bSFrank Mayhar 2889924a92aSTheodore Ts'o #define ext4_journal_start_sb(sb, type, nblocks) \ 2899924a92aSTheodore Ts'o __ext4_journal_start_sb((sb), __LINE__, (type), (nblocks)) 2909924a92aSTheodore Ts'o 2919924a92aSTheodore Ts'o #define ext4_journal_start(inode, type, nblocks) \ 2929924a92aSTheodore Ts'o __ext4_journal_start((inode), __LINE__, (type), (nblocks)) 2939924a92aSTheodore Ts'o 2949924a92aSTheodore Ts'o static inline handle_t *__ext4_journal_start(struct inode *inode, 2959924a92aSTheodore Ts'o unsigned int line, int type, 2969924a92aSTheodore Ts'o int nblocks) 2973dcf5451SChristoph Hellwig { 2989924a92aSTheodore Ts'o return __ext4_journal_start_sb(inode->i_sb, line, type, nblocks); 2993dcf5451SChristoph Hellwig } 3003dcf5451SChristoph Hellwig 3013dcf5451SChristoph Hellwig #define ext4_journal_stop(handle) \ 302c398eda0STheodore Ts'o __ext4_journal_stop(__func__, __LINE__, (handle)) 3033dcf5451SChristoph Hellwig 3043dcf5451SChristoph Hellwig static inline handle_t *ext4_journal_current_handle(void) 3053dcf5451SChristoph Hellwig { 3063dcf5451SChristoph Hellwig return journal_current_handle(); 3073dcf5451SChristoph Hellwig } 3083dcf5451SChristoph Hellwig 3093dcf5451SChristoph Hellwig static inline int ext4_journal_extend(handle_t *handle, int nblocks) 3103dcf5451SChristoph Hellwig { 3110390131bSFrank Mayhar if (ext4_handle_valid(handle)) 3123dcf5451SChristoph Hellwig return jbd2_journal_extend(handle, nblocks); 3130390131bSFrank Mayhar return 0; 3143dcf5451SChristoph Hellwig } 3153dcf5451SChristoph Hellwig 3163dcf5451SChristoph Hellwig static inline int ext4_journal_restart(handle_t *handle, int nblocks) 3173dcf5451SChristoph Hellwig { 3180390131bSFrank Mayhar if (ext4_handle_valid(handle)) 3193dcf5451SChristoph Hellwig return jbd2_journal_restart(handle, nblocks); 3200390131bSFrank Mayhar return 0; 3213dcf5451SChristoph Hellwig } 3223dcf5451SChristoph Hellwig 3233dcf5451SChristoph Hellwig static inline int ext4_journal_blocks_per_page(struct inode *inode) 3243dcf5451SChristoph Hellwig { 3250390131bSFrank Mayhar if (EXT4_JOURNAL(inode) != NULL) 3263dcf5451SChristoph Hellwig return jbd2_journal_blocks_per_page(inode); 3270390131bSFrank Mayhar return 0; 3283dcf5451SChristoph Hellwig } 3293dcf5451SChristoph Hellwig 3303dcf5451SChristoph Hellwig static inline int ext4_journal_force_commit(journal_t *journal) 3313dcf5451SChristoph Hellwig { 3320390131bSFrank Mayhar if (journal) 3333dcf5451SChristoph Hellwig return jbd2_journal_force_commit(journal); 3340390131bSFrank Mayhar return 0; 3353dcf5451SChristoph Hellwig } 3363dcf5451SChristoph Hellwig 337678aaf48SJan Kara static inline int ext4_jbd2_file_inode(handle_t *handle, struct inode *inode) 338678aaf48SJan Kara { 3390390131bSFrank Mayhar if (ext4_handle_valid(handle)) 3408aefcd55STheodore Ts'o return jbd2_journal_file_inode(handle, EXT4_I(inode)->jinode); 3410390131bSFrank Mayhar return 0; 342678aaf48SJan Kara } 343678aaf48SJan Kara 344b436b9beSJan Kara static inline void ext4_update_inode_fsync_trans(handle_t *handle, 345b436b9beSJan Kara struct inode *inode, 346b436b9beSJan Kara int datasync) 347b436b9beSJan Kara { 348b436b9beSJan Kara struct ext4_inode_info *ei = EXT4_I(inode); 349b436b9beSJan Kara 350b436b9beSJan Kara if (ext4_handle_valid(handle)) { 351b436b9beSJan Kara ei->i_sync_tid = handle->h_transaction->t_tid; 352b436b9beSJan Kara if (datasync) 353b436b9beSJan Kara ei->i_datasync_tid = handle->h_transaction->t_tid; 354b436b9beSJan Kara } 355b436b9beSJan Kara } 356b436b9beSJan Kara 3573dcf5451SChristoph Hellwig /* super.c */ 3583dcf5451SChristoph Hellwig int ext4_force_commit(struct super_block *sb); 3593dcf5451SChristoph Hellwig 3603d2b1582SLukas Czerner /* 3613d2b1582SLukas Czerner * Ext4 inode journal modes 3623d2b1582SLukas Czerner */ 3633d2b1582SLukas Czerner #define EXT4_INODE_JOURNAL_DATA_MODE 0x01 /* journal data mode */ 3643d2b1582SLukas Czerner #define EXT4_INODE_ORDERED_DATA_MODE 0x02 /* ordered data mode */ 3653d2b1582SLukas Czerner #define EXT4_INODE_WRITEBACK_DATA_MODE 0x04 /* writeback data mode */ 3663d2b1582SLukas Czerner 3673d2b1582SLukas Czerner static inline int ext4_inode_journal_mode(struct inode *inode) 3683dcf5451SChristoph Hellwig { 3690390131bSFrank Mayhar if (EXT4_JOURNAL(inode) == NULL) 3703d2b1582SLukas Czerner return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */ 3713d2b1582SLukas Czerner /* We do not support data journalling with delayed allocation */ 3723d2b1582SLukas Czerner if (!S_ISREG(inode->i_mode) || 3733d2b1582SLukas Czerner test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 3743d2b1582SLukas Czerner return EXT4_INODE_JOURNAL_DATA_MODE; /* journal data */ 3753d2b1582SLukas Czerner if (ext4_test_inode_flag(inode, EXT4_INODE_JOURNAL_DATA) && 3763d2b1582SLukas Czerner !test_opt(inode->i_sb, DELALLOC)) 3773d2b1582SLukas Czerner return EXT4_INODE_JOURNAL_DATA_MODE; /* journal data */ 3783d2b1582SLukas Czerner if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 3793d2b1582SLukas Czerner return EXT4_INODE_ORDERED_DATA_MODE; /* ordered */ 3803d2b1582SLukas Czerner if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 3813d2b1582SLukas Czerner return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */ 3823d2b1582SLukas Czerner else 3833d2b1582SLukas Czerner BUG(); 3843d2b1582SLukas Czerner } 3853d2b1582SLukas Czerner 3863d2b1582SLukas Czerner static inline int ext4_should_journal_data(struct inode *inode) 3873d2b1582SLukas Czerner { 3883d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_JOURNAL_DATA_MODE; 3893dcf5451SChristoph Hellwig } 3903dcf5451SChristoph Hellwig 3913dcf5451SChristoph Hellwig static inline int ext4_should_order_data(struct inode *inode) 3923dcf5451SChristoph Hellwig { 3933d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_ORDERED_DATA_MODE; 3943dcf5451SChristoph Hellwig } 3953dcf5451SChristoph Hellwig 3963dcf5451SChristoph Hellwig static inline int ext4_should_writeback_data(struct inode *inode) 3973dcf5451SChristoph Hellwig { 3983d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_WRITEBACK_DATA_MODE; 3993dcf5451SChristoph Hellwig } 4003dcf5451SChristoph Hellwig 401744692dcSJiaying Zhang /* 402744692dcSJiaying Zhang * This function controls whether or not we should try to go down the 403744692dcSJiaying Zhang * dioread_nolock code paths, which makes it safe to avoid taking 404744692dcSJiaying Zhang * i_mutex for direct I/O reads. This only works for extent-based 405206f7ab4SChristoph Hellwig * files, and it doesn't work if data journaling is enabled, since the 406206f7ab4SChristoph Hellwig * dioread_nolock code uses b_private to pass information back to the 407206f7ab4SChristoph Hellwig * I/O completion handler, and this conflicts with the jbd's use of 408206f7ab4SChristoph Hellwig * b_private. 409744692dcSJiaying Zhang */ 410744692dcSJiaying Zhang static inline int ext4_should_dioread_nolock(struct inode *inode) 411744692dcSJiaying Zhang { 412744692dcSJiaying Zhang if (!test_opt(inode->i_sb, DIOREAD_NOLOCK)) 413744692dcSJiaying Zhang return 0; 414744692dcSJiaying Zhang if (!S_ISREG(inode->i_mode)) 415744692dcSJiaying Zhang return 0; 41612e9b892SDmitry Monakhov if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) 417744692dcSJiaying Zhang return 0; 418744692dcSJiaying Zhang if (ext4_should_journal_data(inode)) 419744692dcSJiaying Zhang return 0; 420744692dcSJiaying Zhang return 1; 421744692dcSJiaying Zhang } 422744692dcSJiaying Zhang 4233dcf5451SChristoph Hellwig #endif /* _EXT4_JBD2_H */ 424