The patch titled Subject: nilfs2: separate inode type information from i_state field has been added to the -mm mm-nonmm-unstable branch. Its filename is nilfs2-separate-inode-type-information-from-i_state-field.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/nilfs2-separate-inode-type-information-from-i_state-field.patch This patch will later appear in the mm-nonmm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxx> Subject: nilfs2: separate inode type information from i_state field Date: Tue, 27 Aug 2024 02:41:11 +0900 In nilfs_iget_locked() and nilfs_ilookup(), which are used to find or obtain nilfs2 inodes, the nilfs_iget_args structure used to identify inodes has type information divided into multiple booleans, making type determination complicated. Simplify inode type determination by consolidating inode type information into an unsigned integer represented by a comibination of flags and by separating the type identification information for on-memory inodes from the i_state member in the nilfs_inode_info structure. Link: https://lkml.kernel.org/r/20240826174116.5008-4-konishi.ryusuke@xxxxxxxxx Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxx> Cc: Huang Xiaojia <huangxiaojia2@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/nilfs2/inode.c | 56 ++++++++++-------------------------------- fs/nilfs2/nilfs.h | 15 +++++++++-- fs/nilfs2/segment.c | 2 - fs/nilfs2/super.c | 1 4 files changed, 28 insertions(+), 46 deletions(-) --- a/fs/nilfs2/inode.c~nilfs2-separate-inode-type-information-from-i_state-field +++ a/fs/nilfs2/inode.c @@ -28,17 +28,13 @@ * @ino: inode number * @cno: checkpoint number * @root: pointer on NILFS root object (mounted checkpoint) - * @for_gc: inode for GC flag - * @for_btnc: inode for B-tree node cache flag - * @for_shadow: inode for shadowed page cache flag + * @type: inode type */ struct nilfs_iget_args { u64 ino; __u64 cno; struct nilfs_root *root; - bool for_gc; - bool for_btnc; - bool for_shadow; + unsigned int type; }; static int nilfs_iget_test(struct inode *inode, void *opaque); @@ -315,8 +311,7 @@ static int nilfs_insert_inode_locked(str unsigned long ino) { struct nilfs_iget_args args = { - .ino = ino, .root = root, .cno = 0, .for_gc = false, - .for_btnc = false, .for_shadow = false + .ino = ino, .root = root, .cno = 0, .type = NILFS_I_TYPE_NORMAL }; return insert_inode_locked4(inode, ino, nilfs_iget_test, &args); @@ -343,6 +338,7 @@ struct inode *nilfs_new_inode(struct ino root = NILFS_I(dir)->i_root; ii = NILFS_I(inode); ii->i_state = BIT(NILFS_I_NEW); + ii->i_type = NILFS_I_TYPE_NORMAL; ii->i_root = root; err = nilfs_ifile_create_inode(root->ifile, &ino, &bh); @@ -546,23 +542,10 @@ static int nilfs_iget_test(struct inode return 0; ii = NILFS_I(inode); - if (test_bit(NILFS_I_BTNC, &ii->i_state)) { - if (!args->for_btnc) - return 0; - } else if (args->for_btnc) { + if (ii->i_type != args->type) return 0; - } - if (test_bit(NILFS_I_SHADOW, &ii->i_state)) { - if (!args->for_shadow) - return 0; - } else if (args->for_shadow) { - return 0; - } - if (!test_bit(NILFS_I_GCINODE, &ii->i_state)) - return !args->for_gc; - - return args->for_gc && args->cno == ii->i_cno; + return !(args->type & NILFS_I_TYPE_GC) || args->cno == ii->i_cno; } static int nilfs_iget_set(struct inode *inode, void *opaque) @@ -572,15 +555,9 @@ static int nilfs_iget_set(struct inode * inode->i_ino = args->ino; NILFS_I(inode)->i_cno = args->cno; NILFS_I(inode)->i_root = args->root; + NILFS_I(inode)->i_type = args->type; if (args->root && args->ino == NILFS_ROOT_INO) nilfs_get_root(args->root); - - if (args->for_gc) - NILFS_I(inode)->i_state = BIT(NILFS_I_GCINODE); - if (args->for_btnc) - NILFS_I(inode)->i_state |= BIT(NILFS_I_BTNC); - if (args->for_shadow) - NILFS_I(inode)->i_state |= BIT(NILFS_I_SHADOW); return 0; } @@ -588,8 +565,7 @@ struct inode *nilfs_ilookup(struct super unsigned long ino) { struct nilfs_iget_args args = { - .ino = ino, .root = root, .cno = 0, .for_gc = false, - .for_btnc = false, .for_shadow = false + .ino = ino, .root = root, .cno = 0, .type = NILFS_I_TYPE_NORMAL }; return ilookup5(sb, ino, nilfs_iget_test, &args); @@ -599,8 +575,7 @@ struct inode *nilfs_iget_locked(struct s unsigned long ino) { struct nilfs_iget_args args = { - .ino = ino, .root = root, .cno = 0, .for_gc = false, - .for_btnc = false, .for_shadow = false + .ino = ino, .root = root, .cno = 0, .type = NILFS_I_TYPE_NORMAL }; return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); @@ -631,8 +606,7 @@ struct inode *nilfs_iget_for_gc(struct s __u64 cno) { struct nilfs_iget_args args = { - .ino = ino, .root = NULL, .cno = cno, .for_gc = true, - .for_btnc = false, .for_shadow = false + .ino = ino, .root = NULL, .cno = cno, .type = NILFS_I_TYPE_GC }; struct inode *inode; int err; @@ -677,9 +651,7 @@ int nilfs_attach_btree_node_cache(struct args.ino = inode->i_ino; args.root = ii->i_root; args.cno = ii->i_cno; - args.for_gc = test_bit(NILFS_I_GCINODE, &ii->i_state) != 0; - args.for_btnc = true; - args.for_shadow = test_bit(NILFS_I_SHADOW, &ii->i_state) != 0; + args.type = ii->i_type | NILFS_I_TYPE_BTNC; btnc_inode = iget5_locked(inode->i_sb, inode->i_ino, nilfs_iget_test, nilfs_iget_set, &args); @@ -733,8 +705,8 @@ void nilfs_detach_btree_node_cache(struc struct inode *nilfs_iget_for_shadow(struct inode *inode) { struct nilfs_iget_args args = { - .ino = inode->i_ino, .root = NULL, .cno = 0, .for_gc = false, - .for_btnc = false, .for_shadow = true + .ino = inode->i_ino, .root = NULL, .cno = 0, + .type = NILFS_I_TYPE_SHADOW }; struct inode *s_inode; int err; @@ -900,7 +872,7 @@ static void nilfs_clear_inode(struct ino if (test_bit(NILFS_I_BMAP, &ii->i_state)) nilfs_bmap_clear(ii->i_bmap); - if (!test_bit(NILFS_I_BTNC, &ii->i_state)) + if (!(ii->i_type & NILFS_I_TYPE_BTNC)) nilfs_detach_btree_node_cache(inode); if (ii->i_root && inode->i_ino == NILFS_ROOT_INO) --- a/fs/nilfs2/nilfs.h~nilfs2-separate-inode-type-information-from-i_state-field +++ a/fs/nilfs2/nilfs.h @@ -22,6 +22,7 @@ /** * struct nilfs_inode_info - nilfs inode data in memory * @i_flags: inode flags + * @i_type: inode type (combination of flags that inidicate usage) * @i_state: dynamic state flags * @i_bmap: pointer on i_bmap_data * @i_bmap_data: raw block mapping @@ -37,6 +38,7 @@ */ struct nilfs_inode_info { __u32 i_flags; + unsigned int i_type; unsigned long i_state; /* Dynamic state flags */ struct nilfs_bmap *i_bmap; struct nilfs_bmap i_bmap_data; @@ -90,9 +92,16 @@ enum { NILFS_I_UPDATED, /* The file has been written back */ NILFS_I_INODE_SYNC, /* dsync is not allowed for inode */ NILFS_I_BMAP, /* has bmap and btnode_cache */ - NILFS_I_GCINODE, /* inode for GC, on memory only */ - NILFS_I_BTNC, /* inode for btree node cache */ - NILFS_I_SHADOW, /* inode for shadowed page cache */ +}; + +/* + * Flags to identify the usage of on-memory inodes (i_type) + */ +enum { + NILFS_I_TYPE_NORMAL = 0, + NILFS_I_TYPE_GC = 0x0001, /* For data caching during GC */ + NILFS_I_TYPE_BTNC = 0x0002, /* For btree node cache */ + NILFS_I_TYPE_SHADOW = 0x0004, /* For shadowed page cache */ }; /* --- a/fs/nilfs2/segment.c~nilfs2-separate-inode-type-information-from-i_state-field +++ a/fs/nilfs2/segment.c @@ -519,7 +519,7 @@ static void nilfs_segctor_end_finfo(stru ii = NILFS_I(inode); - if (test_bit(NILFS_I_GCINODE, &ii->i_state)) + if (ii->i_type & NILFS_I_TYPE_GC) cno = ii->i_cno; else if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) cno = 0; --- a/fs/nilfs2/super.c~nilfs2-separate-inode-type-information-from-i_state-field +++ a/fs/nilfs2/super.c @@ -160,6 +160,7 @@ struct inode *nilfs_alloc_inode(struct s return NULL; ii->i_bh = NULL; ii->i_state = 0; + ii->i_type = 0; ii->i_cno = 0; ii->i_assoc_inode = NULL; ii->i_bmap = &ii->i_bmap_data; _ Patches currently in -mm which might be from konishi.ryusuke@xxxxxxxxx are nilfs2-protect-references-to-superblock-parameters-exposed-in-sysfs.patch nilfs2-fix-missing-cleanup-on-rollforward-recovery-error.patch nilfs2-fix-state-management-in-error-path-of-log-writing-function.patch nilfs2-add-support-for-fs_ioc_getuuid.patch nilfs2-add-support-for-fs_ioc_getfssysfspath.patch nilfs2-add-support-for-fs_ioc_getfslabel.patch nilfs2-add-support-for-fs_ioc_setfslabel.patch nilfs2-do-not-output-warnings-when-clearing-dirty-buffers.patch nilfs2-add-missing-argument-description-for-__nilfs_error.patch nilfs2-add-missing-argument-descriptions-for-ioctl-related-helpers.patch nilfs2-improve-kernel-doc-comments-for-b-tree-node-helpers.patch nilfs2-fix-incorrect-kernel-doc-declaration-of-nilfs_palloc_req-structure.patch nilfs2-add-missing-description-of-nilfs_btree_path-structure.patch nilfs2-describe-the-members-of-nilfs_bmap_operations-structure.patch nilfs2-fix-inconsistencies-in-kernel-doc-comments-in-segmenth.patch nilfs2-fix-missing-initial-short-descriptions-of-kernel-doc-comments.patch nilfs2-treat-missing-sufile-header-block-as-metadata-corruption.patch nilfs2-treat-missing-cpfile-header-block-as-metadata-corruption.patch nilfs2-do-not-propagate-enoent-error-from-sufile-during-recovery.patch nilfs2-do-not-propagate-enoent-error-from-sufile-during-gc.patch nilfs2-do-not-propagate-enoent-error-from-nilfs_sufile_mark_dirty.patch nilfs2-use-the-bits_per_long-macro.patch nilfs2-separate-inode-type-information-from-i_state-field.patch nilfs2-eliminate-the-shared-counter-and-spinlock-for-i_generation.patch nilfs2-do-not-repair-reserved-inode-bitmap-in-nilfs_new_inode.patch nilfs2-remove-sc_timer_task.patch nilfs2-use-kthread_create-and-kthread_stop-for-the-log-writer-thread.patch nilfs2-refactor-nilfs_segctor_thread.patch