The quilt patch titled
Subject: nilfs2: separate inode type information from i_state field
has been removed from the -mm tree. Its filename was
nilfs2-separate-inode-type-information-from-i_state-field.patch
This patch was dropped because it was merged into the mm-nonmm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
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
