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 /* Define an arbitrary limit for the amount of data we will anticipate 633dcf5451SChristoph Hellwig * writing to any given transaction. For unbounded transactions such as 643dcf5451SChristoph Hellwig * write(2) and truncate(2) we can write more than this, but we always 653dcf5451SChristoph Hellwig * start off at the maximum transaction size and grow the transaction 663dcf5451SChristoph Hellwig * optimistically as we go. */ 673dcf5451SChristoph Hellwig 683dcf5451SChristoph Hellwig #define EXT4_MAX_TRANS_DATA 64U 693dcf5451SChristoph Hellwig 703dcf5451SChristoph Hellwig /* We break up a large truncate or write transaction once the handle's 713dcf5451SChristoph Hellwig * buffer credits gets this low, we need either to extend the 723dcf5451SChristoph Hellwig * transaction or to start a new one. Reserve enough space here for 733dcf5451SChristoph Hellwig * inode, bitmap, superblock, group and indirection updates for at least 743dcf5451SChristoph Hellwig * one block, plus two quota updates. Quota allocations are not 753dcf5451SChristoph Hellwig * needed. */ 763dcf5451SChristoph Hellwig 773dcf5451SChristoph Hellwig #define EXT4_RESERVE_TRANS_BLOCKS 12U 783dcf5451SChristoph Hellwig 793dcf5451SChristoph Hellwig #define EXT4_INDEX_EXTRA_TRANS_BLOCKS 8 803dcf5451SChristoph Hellwig 813dcf5451SChristoph Hellwig #ifdef CONFIG_QUOTA 823dcf5451SChristoph Hellwig /* Amount of blocks needed for quota update - we know that the structure was 8321f97697SJan Kara * allocated so we need to update only data block */ 847c319d32SAditya Kali #define EXT4_QUOTA_TRANS_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\ 857c319d32SAditya Kali EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) ?\ 867c319d32SAditya Kali 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) ||\ 907c319d32SAditya Kali EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) ?\ 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) ||\ 957c319d32SAditya Kali EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) ?\ 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 1035aca07ebSDmitry Monakhov #define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb)) 1045aca07ebSDmitry Monakhov #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb)) 1055aca07ebSDmitry Monakhov #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (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 1359924a92aSTheodore Ts'o #define EXT4_HT_MAX 11 1369924a92aSTheodore Ts'o 13718aadd47SBobi Jam /** 13818aadd47SBobi Jam * struct ext4_journal_cb_entry - Base structure for callback information. 13918aadd47SBobi Jam * 14018aadd47SBobi Jam * This struct is a 'seed' structure for a using with your own callback 14118aadd47SBobi Jam * structs. If you are using callbacks you must allocate one of these 14218aadd47SBobi Jam * or another struct of your own definition which has this struct 14318aadd47SBobi Jam * as it's first element and pass it to ext4_journal_callback_add(). 14418aadd47SBobi Jam */ 14518aadd47SBobi Jam struct ext4_journal_cb_entry { 14618aadd47SBobi Jam /* list information for other callbacks attached to the same handle */ 14718aadd47SBobi Jam struct list_head jce_list; 14818aadd47SBobi Jam 14918aadd47SBobi Jam /* Function to call with this callback structure */ 15018aadd47SBobi Jam void (*jce_func)(struct super_block *sb, 15118aadd47SBobi Jam struct ext4_journal_cb_entry *jce, int error); 15218aadd47SBobi Jam 15318aadd47SBobi Jam /* user data goes here */ 15418aadd47SBobi Jam }; 15518aadd47SBobi Jam 15618aadd47SBobi Jam /** 15718aadd47SBobi Jam * ext4_journal_callback_add: add a function to call after transaction commit 15818aadd47SBobi Jam * @handle: active journal transaction handle to register callback on 15918aadd47SBobi Jam * @func: callback function to call after the transaction has committed: 16018aadd47SBobi Jam * @sb: superblock of current filesystem for transaction 16118aadd47SBobi Jam * @jce: returned journal callback data 16218aadd47SBobi Jam * @rc: journal state at commit (0 = transaction committed properly) 16318aadd47SBobi Jam * @jce: journal callback data (internal and function private data struct) 16418aadd47SBobi Jam * 16518aadd47SBobi Jam * The registered function will be called in the context of the journal thread 16618aadd47SBobi Jam * after the transaction for which the handle was created has completed. 16718aadd47SBobi Jam * 16818aadd47SBobi Jam * No locks are held when the callback function is called, so it is safe to 16918aadd47SBobi Jam * call blocking functions from within the callback, but the callback should 17018aadd47SBobi Jam * not block or run for too long, or the filesystem will be blocked waiting for 17118aadd47SBobi Jam * the next transaction to commit. No journaling functions can be used, or 17218aadd47SBobi Jam * there is a risk of deadlock. 17318aadd47SBobi Jam * 17418aadd47SBobi Jam * There is no guaranteed calling order of multiple registered callbacks on 17518aadd47SBobi Jam * the same transaction. 17618aadd47SBobi Jam */ 17718aadd47SBobi Jam static inline void ext4_journal_callback_add(handle_t *handle, 17818aadd47SBobi Jam void (*func)(struct super_block *sb, 17918aadd47SBobi Jam struct ext4_journal_cb_entry *jce, 18018aadd47SBobi Jam int rc), 18118aadd47SBobi Jam struct ext4_journal_cb_entry *jce) 18218aadd47SBobi Jam { 18318aadd47SBobi Jam struct ext4_sb_info *sbi = 18418aadd47SBobi Jam EXT4_SB(handle->h_transaction->t_journal->j_private); 18518aadd47SBobi Jam 18618aadd47SBobi Jam /* Add the jce to transaction's private list */ 18718aadd47SBobi Jam jce->jce_func = func; 18818aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 18918aadd47SBobi Jam list_add_tail(&jce->jce_list, &handle->h_transaction->t_private_list); 19018aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 19118aadd47SBobi Jam } 19218aadd47SBobi Jam 19318aadd47SBobi Jam /** 19418aadd47SBobi Jam * ext4_journal_callback_del: delete a registered callback 19518aadd47SBobi Jam * @handle: active journal transaction handle on which callback was registered 19618aadd47SBobi Jam * @jce: registered journal callback entry to unregister 1975d3ee208SDmitry Monakhov * Return true if object was sucessfully removed 19818aadd47SBobi Jam */ 1995d3ee208SDmitry Monakhov static inline bool ext4_journal_callback_try_del(handle_t *handle, 20018aadd47SBobi Jam struct ext4_journal_cb_entry *jce) 20118aadd47SBobi Jam { 2025d3ee208SDmitry Monakhov bool deleted; 20318aadd47SBobi Jam struct ext4_sb_info *sbi = 20418aadd47SBobi Jam EXT4_SB(handle->h_transaction->t_journal->j_private); 20518aadd47SBobi Jam 20618aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 2075d3ee208SDmitry Monakhov deleted = !list_empty(&jce->jce_list); 20818aadd47SBobi Jam list_del_init(&jce->jce_list); 20918aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 2105d3ee208SDmitry Monakhov return deleted; 21118aadd47SBobi Jam } 21218aadd47SBobi Jam 2133dcf5451SChristoph Hellwig int 2143dcf5451SChristoph Hellwig ext4_mark_iloc_dirty(handle_t *handle, 2153dcf5451SChristoph Hellwig struct inode *inode, 2163dcf5451SChristoph Hellwig struct ext4_iloc *iloc); 2173dcf5451SChristoph Hellwig 2183dcf5451SChristoph Hellwig /* 2193dcf5451SChristoph Hellwig * On success, We end up with an outstanding reference count against 2203dcf5451SChristoph Hellwig * iloc->bh. This _must_ be cleaned up later. 2213dcf5451SChristoph Hellwig */ 2223dcf5451SChristoph Hellwig 2233dcf5451SChristoph Hellwig int ext4_reserve_inode_write(handle_t *handle, struct inode *inode, 2243dcf5451SChristoph Hellwig struct ext4_iloc *iloc); 2253dcf5451SChristoph Hellwig 2263dcf5451SChristoph Hellwig int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode); 2273dcf5451SChristoph Hellwig 2283dcf5451SChristoph Hellwig /* 229e4684b3fSTheodore Ts'o * Wrapper functions with which ext4 calls into JBD. 2303dcf5451SChristoph Hellwig */ 23190c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 23290c7201bSTheodore Ts'o const char *err_fn, 2333dcf5451SChristoph Hellwig struct buffer_head *bh, handle_t *handle, int err); 2343dcf5451SChristoph Hellwig 23590c7201bSTheodore Ts'o int __ext4_journal_get_write_access(const char *where, unsigned int line, 23690c7201bSTheodore Ts'o handle_t *handle, struct buffer_head *bh); 2373dcf5451SChristoph Hellwig 23890c7201bSTheodore Ts'o int __ext4_forget(const char *where, unsigned int line, handle_t *handle, 23990c7201bSTheodore Ts'o int is_metadata, struct inode *inode, 24090c7201bSTheodore Ts'o struct buffer_head *bh, ext4_fsblk_t blocknr); 24190c7201bSTheodore Ts'o 24290c7201bSTheodore Ts'o int __ext4_journal_get_create_access(const char *where, unsigned int line, 24390c7201bSTheodore Ts'o handle_t *handle, struct buffer_head *bh); 24490c7201bSTheodore Ts'o 24590c7201bSTheodore Ts'o int __ext4_handle_dirty_metadata(const char *where, unsigned int line, 24690c7201bSTheodore Ts'o handle_t *handle, struct inode *inode, 24790c7201bSTheodore Ts'o struct buffer_head *bh); 24890c7201bSTheodore Ts'o 24990c7201bSTheodore Ts'o int __ext4_handle_dirty_super(const char *where, unsigned int line, 250b50924c2SArtem Bityutskiy handle_t *handle, struct super_block *sb); 251a0375156STheodore Ts'o 2523dcf5451SChristoph Hellwig #define ext4_journal_get_write_access(handle, bh) \ 25390c7201bSTheodore Ts'o __ext4_journal_get_write_access(__func__, __LINE__, (handle), (bh)) 254d6797d14STheodore Ts'o #define ext4_forget(handle, is_metadata, inode, bh, block_nr) \ 25590c7201bSTheodore Ts'o __ext4_forget(__func__, __LINE__, (handle), (is_metadata), (inode), \ 25690c7201bSTheodore Ts'o (bh), (block_nr)) 2573dcf5451SChristoph Hellwig #define ext4_journal_get_create_access(handle, bh) \ 25890c7201bSTheodore Ts'o __ext4_journal_get_create_access(__func__, __LINE__, (handle), (bh)) 2590390131bSFrank Mayhar #define ext4_handle_dirty_metadata(handle, inode, bh) \ 26090c7201bSTheodore Ts'o __ext4_handle_dirty_metadata(__func__, __LINE__, (handle), (inode), \ 26190c7201bSTheodore Ts'o (bh)) 262a0375156STheodore Ts'o #define ext4_handle_dirty_super(handle, sb) \ 263b50924c2SArtem Bityutskiy __ext4_handle_dirty_super(__func__, __LINE__, (handle), (sb)) 2643dcf5451SChristoph Hellwig 2659924a92aSTheodore Ts'o handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line, 2669924a92aSTheodore Ts'o int type, int nblocks); 267c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle); 2683dcf5451SChristoph Hellwig 269d3d1faf6SCurt Wohlgemuth #define EXT4_NOJOURNAL_MAX_REF_COUNT ((unsigned long) 4096) 2700390131bSFrank Mayhar 271d3d1faf6SCurt Wohlgemuth /* Note: Do not use this for NULL handles. This is only to determine if 272d3d1faf6SCurt Wohlgemuth * a properly allocated handle is using a journal or not. */ 2730390131bSFrank Mayhar static inline int ext4_handle_valid(handle_t *handle) 2740390131bSFrank Mayhar { 275d3d1faf6SCurt Wohlgemuth if ((unsigned long)handle < EXT4_NOJOURNAL_MAX_REF_COUNT) 2760390131bSFrank Mayhar return 0; 2770390131bSFrank Mayhar return 1; 2780390131bSFrank Mayhar } 2790390131bSFrank Mayhar 2800390131bSFrank Mayhar static inline void ext4_handle_sync(handle_t *handle) 2810390131bSFrank Mayhar { 2820390131bSFrank Mayhar if (ext4_handle_valid(handle)) 2830390131bSFrank Mayhar handle->h_sync = 1; 2840390131bSFrank Mayhar } 2850390131bSFrank Mayhar 2860390131bSFrank Mayhar static inline int ext4_handle_is_aborted(handle_t *handle) 2870390131bSFrank Mayhar { 2880390131bSFrank Mayhar if (ext4_handle_valid(handle)) 2890390131bSFrank Mayhar return is_handle_aborted(handle); 2900390131bSFrank Mayhar return 0; 2910390131bSFrank Mayhar } 2920390131bSFrank Mayhar 2930390131bSFrank Mayhar static inline int ext4_handle_has_enough_credits(handle_t *handle, int needed) 2940390131bSFrank Mayhar { 2950390131bSFrank Mayhar if (ext4_handle_valid(handle) && handle->h_buffer_credits < needed) 2960390131bSFrank Mayhar return 0; 2970390131bSFrank Mayhar return 1; 2980390131bSFrank Mayhar } 2990390131bSFrank Mayhar 3009924a92aSTheodore Ts'o #define ext4_journal_start_sb(sb, type, nblocks) \ 3019924a92aSTheodore Ts'o __ext4_journal_start_sb((sb), __LINE__, (type), (nblocks)) 3029924a92aSTheodore Ts'o 3039924a92aSTheodore Ts'o #define ext4_journal_start(inode, type, nblocks) \ 3049924a92aSTheodore Ts'o __ext4_journal_start((inode), __LINE__, (type), (nblocks)) 3059924a92aSTheodore Ts'o 3069924a92aSTheodore Ts'o static inline handle_t *__ext4_journal_start(struct inode *inode, 3079924a92aSTheodore Ts'o unsigned int line, int type, 3089924a92aSTheodore Ts'o int nblocks) 3093dcf5451SChristoph Hellwig { 3109924a92aSTheodore Ts'o return __ext4_journal_start_sb(inode->i_sb, line, type, nblocks); 3113dcf5451SChristoph Hellwig } 3123dcf5451SChristoph Hellwig 3133dcf5451SChristoph Hellwig #define ext4_journal_stop(handle) \ 314c398eda0STheodore Ts'o __ext4_journal_stop(__func__, __LINE__, (handle)) 3153dcf5451SChristoph Hellwig 3163dcf5451SChristoph Hellwig static inline handle_t *ext4_journal_current_handle(void) 3173dcf5451SChristoph Hellwig { 3183dcf5451SChristoph Hellwig return journal_current_handle(); 3193dcf5451SChristoph Hellwig } 3203dcf5451SChristoph Hellwig 3213dcf5451SChristoph Hellwig static inline int ext4_journal_extend(handle_t *handle, int nblocks) 3223dcf5451SChristoph Hellwig { 3230390131bSFrank Mayhar if (ext4_handle_valid(handle)) 3243dcf5451SChristoph Hellwig return jbd2_journal_extend(handle, nblocks); 3250390131bSFrank Mayhar return 0; 3263dcf5451SChristoph Hellwig } 3273dcf5451SChristoph Hellwig 3283dcf5451SChristoph Hellwig static inline int ext4_journal_restart(handle_t *handle, int nblocks) 3293dcf5451SChristoph Hellwig { 3300390131bSFrank Mayhar if (ext4_handle_valid(handle)) 3313dcf5451SChristoph Hellwig return jbd2_journal_restart(handle, nblocks); 3320390131bSFrank Mayhar return 0; 3333dcf5451SChristoph Hellwig } 3343dcf5451SChristoph Hellwig 3353dcf5451SChristoph Hellwig static inline int ext4_journal_blocks_per_page(struct inode *inode) 3363dcf5451SChristoph Hellwig { 3370390131bSFrank Mayhar if (EXT4_JOURNAL(inode) != NULL) 3383dcf5451SChristoph Hellwig return jbd2_journal_blocks_per_page(inode); 3390390131bSFrank Mayhar return 0; 3403dcf5451SChristoph Hellwig } 3413dcf5451SChristoph Hellwig 3423dcf5451SChristoph Hellwig static inline int ext4_journal_force_commit(journal_t *journal) 3433dcf5451SChristoph Hellwig { 3440390131bSFrank Mayhar if (journal) 3453dcf5451SChristoph Hellwig return jbd2_journal_force_commit(journal); 3460390131bSFrank Mayhar return 0; 3473dcf5451SChristoph Hellwig } 3483dcf5451SChristoph Hellwig 349678aaf48SJan Kara static inline int ext4_jbd2_file_inode(handle_t *handle, struct inode *inode) 350678aaf48SJan Kara { 3510390131bSFrank Mayhar if (ext4_handle_valid(handle)) 3528aefcd55STheodore Ts'o return jbd2_journal_file_inode(handle, EXT4_I(inode)->jinode); 3530390131bSFrank Mayhar return 0; 354678aaf48SJan Kara } 355678aaf48SJan Kara 356b436b9beSJan Kara static inline void ext4_update_inode_fsync_trans(handle_t *handle, 357b436b9beSJan Kara struct inode *inode, 358b436b9beSJan Kara int datasync) 359b436b9beSJan Kara { 360b436b9beSJan Kara struct ext4_inode_info *ei = EXT4_I(inode); 361b436b9beSJan Kara 362b436b9beSJan Kara if (ext4_handle_valid(handle)) { 363b436b9beSJan Kara ei->i_sync_tid = handle->h_transaction->t_tid; 364b436b9beSJan Kara if (datasync) 365b436b9beSJan Kara ei->i_datasync_tid = handle->h_transaction->t_tid; 366b436b9beSJan Kara } 367b436b9beSJan Kara } 368b436b9beSJan Kara 3693dcf5451SChristoph Hellwig /* super.c */ 3703dcf5451SChristoph Hellwig int ext4_force_commit(struct super_block *sb); 3713dcf5451SChristoph Hellwig 3723d2b1582SLukas Czerner /* 3733d2b1582SLukas Czerner * Ext4 inode journal modes 3743d2b1582SLukas Czerner */ 3753d2b1582SLukas Czerner #define EXT4_INODE_JOURNAL_DATA_MODE 0x01 /* journal data mode */ 3763d2b1582SLukas Czerner #define EXT4_INODE_ORDERED_DATA_MODE 0x02 /* ordered data mode */ 3773d2b1582SLukas Czerner #define EXT4_INODE_WRITEBACK_DATA_MODE 0x04 /* writeback data mode */ 3783d2b1582SLukas Czerner 3793d2b1582SLukas Czerner static inline int ext4_inode_journal_mode(struct inode *inode) 3803dcf5451SChristoph Hellwig { 3810390131bSFrank Mayhar if (EXT4_JOURNAL(inode) == NULL) 3823d2b1582SLukas Czerner return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */ 3833d2b1582SLukas Czerner /* We do not support data journalling with delayed allocation */ 3843d2b1582SLukas Czerner if (!S_ISREG(inode->i_mode) || 3853d2b1582SLukas Czerner test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 3863d2b1582SLukas Czerner return EXT4_INODE_JOURNAL_DATA_MODE; /* journal data */ 3873d2b1582SLukas Czerner if (ext4_test_inode_flag(inode, EXT4_INODE_JOURNAL_DATA) && 3883d2b1582SLukas Czerner !test_opt(inode->i_sb, DELALLOC)) 3893d2b1582SLukas Czerner return EXT4_INODE_JOURNAL_DATA_MODE; /* journal data */ 3903d2b1582SLukas Czerner if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 3913d2b1582SLukas Czerner return EXT4_INODE_ORDERED_DATA_MODE; /* ordered */ 3923d2b1582SLukas Czerner if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 3933d2b1582SLukas Czerner return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */ 3943d2b1582SLukas Czerner else 3953d2b1582SLukas Czerner BUG(); 3963d2b1582SLukas Czerner } 3973d2b1582SLukas Czerner 3983d2b1582SLukas Czerner static inline int ext4_should_journal_data(struct inode *inode) 3993d2b1582SLukas Czerner { 4003d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_JOURNAL_DATA_MODE; 4013dcf5451SChristoph Hellwig } 4023dcf5451SChristoph Hellwig 4033dcf5451SChristoph Hellwig static inline int ext4_should_order_data(struct inode *inode) 4043dcf5451SChristoph Hellwig { 4053d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_ORDERED_DATA_MODE; 4063dcf5451SChristoph Hellwig } 4073dcf5451SChristoph Hellwig 4083dcf5451SChristoph Hellwig static inline int ext4_should_writeback_data(struct inode *inode) 4093dcf5451SChristoph Hellwig { 4103d2b1582SLukas Czerner return ext4_inode_journal_mode(inode) & EXT4_INODE_WRITEBACK_DATA_MODE; 4113dcf5451SChristoph Hellwig } 4123dcf5451SChristoph Hellwig 413744692dcSJiaying Zhang /* 414744692dcSJiaying Zhang * This function controls whether or not we should try to go down the 415744692dcSJiaying Zhang * dioread_nolock code paths, which makes it safe to avoid taking 416744692dcSJiaying Zhang * i_mutex for direct I/O reads. This only works for extent-based 417206f7ab4SChristoph Hellwig * files, and it doesn't work if data journaling is enabled, since the 418206f7ab4SChristoph Hellwig * dioread_nolock code uses b_private to pass information back to the 419206f7ab4SChristoph Hellwig * I/O completion handler, and this conflicts with the jbd's use of 420206f7ab4SChristoph Hellwig * b_private. 421744692dcSJiaying Zhang */ 422744692dcSJiaying Zhang static inline int ext4_should_dioread_nolock(struct inode *inode) 423744692dcSJiaying Zhang { 424744692dcSJiaying Zhang if (!test_opt(inode->i_sb, DIOREAD_NOLOCK)) 425744692dcSJiaying Zhang return 0; 426744692dcSJiaying Zhang if (!S_ISREG(inode->i_mode)) 427744692dcSJiaying Zhang return 0; 42812e9b892SDmitry Monakhov if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) 429744692dcSJiaying Zhang return 0; 430744692dcSJiaying Zhang if (ext4_should_journal_data(inode)) 431744692dcSJiaying Zhang return 0; 432744692dcSJiaying Zhang return 1; 433744692dcSJiaying Zhang } 434744692dcSJiaying Zhang 4353dcf5451SChristoph Hellwig #endif /* _EXT4_JBD2_H */ 436