* [PATCH 0/3] nilfs2 additional updates
@ 2016-06-13 13:45 Ryusuke Konishi
2016-06-13 13:45 ` [PATCH 1/3] nilfs2: fix misuse of a semaphore in sysfs code Ryusuke Konishi
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Ryusuke Konishi @ 2016-06-13 13:45 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-nilfs, LKML, Ryusuke Konishi
Hi Andrew,
please add the following changes for the next merge window:
Ryusuke Konishi (3):
nilfs2: fix misuse of a semaphore in sysfs code
nilfs2: use BIT() macro
nilfs2: move ioctl interface and disk layout to uapi separately
In this series,
> nilfs2: fix misuse of a semaphore in sysfs code
corrects, as its name suggests, wrong use of a semaphore, though we
don't know any real problem that it causes. Then,
> nilfs2: use BIT() macro
replaces "(1 << b)" style bit shifts with the generic BIT() macro for
simplicity.
Finally,
> nilfs2: move ioctl interface and disk layout to uapi separately
moves nilfs2_fs.h header, which is currently stored in the
"include/linux" directory, to the uapi directory, splitting the file
into two headers "nilfs2_api.h" and "nilfs2_ondisk.h"; the former
separates ioctl related definitions and the latter collects up on-disk
structures.
Thanks,
Ryusuke Konishi
--
Documentation/filesystems/nilfs2.txt | 3 +-
Documentation/ioctl/ioctl-number.txt | 2 +-
MAINTAINERS | 3 +-
fs/nilfs2/bmap.h | 2 +-
fs/nilfs2/btnode.c | 4 +-
fs/nilfs2/btree.h | 2 +-
fs/nilfs2/cpfile.c | 1 -
fs/nilfs2/cpfile.h | 3 +-
fs/nilfs2/dat.h | 1 +
fs/nilfs2/dir.c | 22 +
fs/nilfs2/direct.h | 10 -
fs/nilfs2/ifile.h | 1 -
fs/nilfs2/inode.c | 4 +-
fs/nilfs2/ioctl.c | 1 -
fs/nilfs2/nilfs.h | 18 +-
fs/nilfs2/page.c | 26 +-
fs/nilfs2/segment.c | 14 +-
fs/nilfs2/segment.h | 1 -
fs/nilfs2/sufile.c | 13 +-
fs/nilfs2/sufile.h | 1 -
fs/nilfs2/sysfs.c | 44 +-
fs/nilfs2/the_nilfs.h | 7 +-
include/linux/nilfs2_fs.h | 934 -----------------------------------
include/uapi/linux/nilfs2_api.h | 292 +++++++++++
include/uapi/linux/nilfs2_ondisk.h | 650 ++++++++++++++++++++++++
25 files changed, 1037 insertions(+), 1022 deletions(-)
delete mode 100644 include/linux/nilfs2_fs.h
create mode 100644 include/uapi/linux/nilfs2_api.h
create mode 100644 include/uapi/linux/nilfs2_ondisk.h
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 1/3] nilfs2: fix misuse of a semaphore in sysfs code
2016-06-13 13:45 [PATCH 0/3] nilfs2 additional updates Ryusuke Konishi
@ 2016-06-13 13:45 ` Ryusuke Konishi
2016-06-13 13:45 ` [PATCH 2/3] nilfs2: use BIT() macro Ryusuke Konishi
2016-06-13 13:45 ` [PATCH 3/3] nilfs2: move ioctl interface and disk layout to uapi separately Ryusuke Konishi
2 siblings, 0 replies; 7+ messages in thread
From: Ryusuke Konishi @ 2016-06-13 13:45 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-nilfs, LKML, Ryusuke Konishi
Variables ns_seg_seq, ns_segnum, ns_nextnum, ns_pseg_offset, ns_cno,
ns_ctime, ns_nongc_ctime, and ns_ndirtyblks, are protected by
ns_segctor_sem, but ns_sem is wrongly used by the nilfs sysfs code
when reading these variables. This fixes the misuse and clarifies
which semaphore protects them in the comment of the_nilfs struct.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
---
fs/nilfs2/sysfs.c | 44 ++++++++++++++++++++++----------------------
fs/nilfs2/the_nilfs.h | 7 ++-----
2 files changed, 24 insertions(+), 27 deletions(-)
diff --git a/fs/nilfs2/sysfs.c b/fs/nilfs2/sysfs.c
index 8e57bb9..490303e 100644
--- a/fs/nilfs2/sysfs.c
+++ b/fs/nilfs2/sysfs.c
@@ -326,9 +326,9 @@ nilfs_checkpoints_next_checkpoint_show(struct nilfs_checkpoints_attr *attr,
{
__u64 cno;
- down_read(&nilfs->ns_sem);
+ down_read(&nilfs->ns_segctor_sem);
cno = nilfs->ns_cno;
- up_read(&nilfs->ns_sem);
+ up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", cno);
}
@@ -511,9 +511,9 @@ nilfs_segctor_current_seg_sequence_show(struct nilfs_segctor_attr *attr,
{
u64 seg_seq;
- down_read(&nilfs->ns_sem);
+ down_read(&nilfs->ns_segctor_sem);
seg_seq = nilfs->ns_seg_seq;
- up_read(&nilfs->ns_sem);
+ up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", seg_seq);
}
@@ -525,9 +525,9 @@ nilfs_segctor_current_last_full_seg_show(struct nilfs_segctor_attr *attr,
{
__u64 segnum;
- down_read(&nilfs->ns_sem);
+ down_read(&nilfs->ns_segctor_sem);
segnum = nilfs->ns_segnum;
- up_read(&nilfs->ns_sem);
+ up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", segnum);
}
@@ -539,9 +539,9 @@ nilfs_segctor_next_full_seg_show(struct nilfs_segctor_attr *attr,
{
__u64 nextnum;
- down_read(&nilfs->ns_sem);
+ down_read(&nilfs->ns_segctor_sem);
nextnum = nilfs->ns_nextnum;
- up_read(&nilfs->ns_sem);
+ up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", nextnum);
}
@@ -553,9 +553,9 @@ nilfs_segctor_next_pseg_offset_show(struct nilfs_segctor_attr *attr,
{
unsigned long pseg_offset;
- down_read(&nilfs->ns_sem);
+ down_read(&nilfs->ns_segctor_sem);
pseg_offset = nilfs->ns_pseg_offset;
- up_read(&nilfs->ns_sem);
+ up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%lu\n", pseg_offset);
}
@@ -567,9 +567,9 @@ nilfs_segctor_next_checkpoint_show(struct nilfs_segctor_attr *attr,
{
__u64 cno;
- down_read(&nilfs->ns_sem);
+ down_read(&nilfs->ns_segctor_sem);
cno = nilfs->ns_cno;
- up_read(&nilfs->ns_sem);
+ up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", cno);
}
@@ -581,9 +581,9 @@ nilfs_segctor_last_seg_write_time_show(struct nilfs_segctor_attr *attr,
{
time_t ctime;
- down_read(&nilfs->ns_sem);
+ down_read(&nilfs->ns_segctor_sem);
ctime = nilfs->ns_ctime;
- up_read(&nilfs->ns_sem);
+ up_read(&nilfs->ns_segctor_sem);
return NILFS_SHOW_TIME(ctime, buf);
}
@@ -595,9 +595,9 @@ nilfs_segctor_last_seg_write_time_secs_show(struct nilfs_segctor_attr *attr,
{
time_t ctime;
- down_read(&nilfs->ns_sem);
+ down_read(&nilfs->ns_segctor_sem);
ctime = nilfs->ns_ctime;
- up_read(&nilfs->ns_sem);
+ up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", (unsigned long long)ctime);
}
@@ -609,9 +609,9 @@ nilfs_segctor_last_nongc_write_time_show(struct nilfs_segctor_attr *attr,
{
time_t nongc_ctime;
- down_read(&nilfs->ns_sem);
+ down_read(&nilfs->ns_segctor_sem);
nongc_ctime = nilfs->ns_nongc_ctime;
- up_read(&nilfs->ns_sem);
+ up_read(&nilfs->ns_segctor_sem);
return NILFS_SHOW_TIME(nongc_ctime, buf);
}
@@ -623,9 +623,9 @@ nilfs_segctor_last_nongc_write_time_secs_show(struct nilfs_segctor_attr *attr,
{
time_t nongc_ctime;
- down_read(&nilfs->ns_sem);
+ down_read(&nilfs->ns_segctor_sem);
nongc_ctime = nilfs->ns_nongc_ctime;
- up_read(&nilfs->ns_sem);
+ up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n",
(unsigned long long)nongc_ctime);
@@ -638,9 +638,9 @@ nilfs_segctor_dirty_data_blocks_count_show(struct nilfs_segctor_attr *attr,
{
u32 ndirtyblks;
- down_read(&nilfs->ns_sem);
+ down_read(&nilfs->ns_segctor_sem);
ndirtyblks = atomic_read(&nilfs->ns_ndirtyblks);
- up_read(&nilfs->ns_sem);
+ up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%u\n", ndirtyblks);
}
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index 79d1421..b305c6f 100644
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -122,11 +122,8 @@ struct the_nilfs {
unsigned int ns_sb_update_freq;
/*
- * Following fields are dedicated to a writable FS-instance.
- * Except for the period seeking checkpoint, code outside the segment
- * constructor must lock a segment semaphore while accessing these
- * fields.
- * The writable FS-instance is sole during a lifetime of the_nilfs.
+ * The following fields are updated by a writable FS-instance.
+ * These fields are protected by ns_segctor_sem outside load_nilfs().
*/
u64 ns_seg_seq;
__u64 ns_segnum;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH 2/3] nilfs2: use BIT() macro
2016-06-13 13:45 [PATCH 0/3] nilfs2 additional updates Ryusuke Konishi
2016-06-13 13:45 ` [PATCH 1/3] nilfs2: fix misuse of a semaphore in sysfs code Ryusuke Konishi
@ 2016-06-13 13:45 ` Ryusuke Konishi
2016-06-13 13:45 ` [PATCH 3/3] nilfs2: move ioctl interface and disk layout to uapi separately Ryusuke Konishi
2 siblings, 0 replies; 7+ messages in thread
From: Ryusuke Konishi @ 2016-06-13 13:45 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-nilfs, LKML, Ryusuke Konishi
Replace bit shifts by BIT macro for clarity.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
---
fs/nilfs2/btnode.c | 4 ++--
fs/nilfs2/inode.c | 4 ++--
fs/nilfs2/nilfs.h | 15 +++++++--------
fs/nilfs2/page.c | 26 +++++++++++++-------------
fs/nilfs2/segment.c | 14 +++++++-------
fs/nilfs2/sufile.c | 12 ++++++------
6 files changed, 37 insertions(+), 38 deletions(-)
diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c
index 0576033..7641cc8 100644
--- a/fs/nilfs2/btnode.c
+++ b/fs/nilfs2/btnode.c
@@ -41,7 +41,7 @@ nilfs_btnode_create_block(struct address_space *btnc, __u64 blocknr)
struct inode *inode = NILFS_BTNC_I(btnc);
struct buffer_head *bh;
- bh = nilfs_grab_buffer(inode, btnc, blocknr, 1 << BH_NILFS_Node);
+ bh = nilfs_grab_buffer(inode, btnc, blocknr, BIT(BH_NILFS_Node));
if (unlikely(!bh))
return NULL;
@@ -70,7 +70,7 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
struct page *page;
int err;
- bh = nilfs_grab_buffer(inode, btnc, blocknr, 1 << BH_NILFS_Node);
+ bh = nilfs_grab_buffer(inode, btnc, blocknr, BIT(BH_NILFS_Node));
if (unlikely(!bh))
return -ENOMEM;
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index b286b35..af04f55 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -356,7 +356,7 @@ struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
root = NILFS_I(dir)->i_root;
ii = NILFS_I(inode);
- ii->i_state = 1 << NILFS_I_NEW;
+ ii->i_state = BIT(NILFS_I_NEW);
ii->i_root = root;
err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh);
@@ -555,7 +555,7 @@ static int nilfs_iget_set(struct inode *inode, void *opaque)
inode->i_ino = args->ino;
if (args->for_gc) {
- NILFS_I(inode)->i_state = 1 << NILFS_I_GCINODE;
+ NILFS_I(inode)->i_state = BIT(NILFS_I_GCINODE);
NILFS_I(inode)->i_cno = args->cno;
NILFS_I(inode)->i_root = NULL;
} else {
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index b7064fae..c6b6960 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -119,20 +119,19 @@ enum {
/*
* Macros to check inode numbers
*/
-#define NILFS_MDT_INO_BITS \
- ((unsigned int)(1 << NILFS_DAT_INO | 1 << NILFS_CPFILE_INO | \
- 1 << NILFS_SUFILE_INO | 1 << NILFS_IFILE_INO | \
- 1 << NILFS_ATIME_INO | 1 << NILFS_SKETCH_INO))
+#define NILFS_MDT_INO_BITS \
+ (BIT(NILFS_DAT_INO) | BIT(NILFS_CPFILE_INO) | \
+ BIT(NILFS_SUFILE_INO) | BIT(NILFS_IFILE_INO) | \
+ BIT(NILFS_ATIME_INO) | BIT(NILFS_SKETCH_INO))
-#define NILFS_SYS_INO_BITS \
- ((unsigned int)(1 << NILFS_ROOT_INO) | NILFS_MDT_INO_BITS)
+#define NILFS_SYS_INO_BITS (BIT(NILFS_ROOT_INO) | NILFS_MDT_INO_BITS)
#define NILFS_FIRST_INO(sb) (((struct the_nilfs *)sb->s_fs_info)->ns_first_ino)
#define NILFS_MDT_INODE(sb, ino) \
- ((ino) < NILFS_FIRST_INO(sb) && (NILFS_MDT_INO_BITS & (1 << (ino))))
+ ((ino) < NILFS_FIRST_INO(sb) && (NILFS_MDT_INO_BITS & BIT(ino)))
#define NILFS_VALID_INODE(sb, ino) \
- ((ino) >= NILFS_FIRST_INO(sb) || (NILFS_SYS_INO_BITS & (1 << (ino))))
+ ((ino) >= NILFS_FIRST_INO(sb) || (NILFS_SYS_INO_BITS & BIT(ino)))
/**
* struct nilfs_transaction_info: context information for synchronization
diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c
index eaccf12..f11a3ad 100644
--- a/fs/nilfs2/page.c
+++ b/fs/nilfs2/page.c
@@ -30,9 +30,9 @@
#include "mdt.h"
-#define NILFS_BUFFER_INHERENT_BITS \
- ((1UL << BH_Uptodate) | (1UL << BH_Mapped) | (1UL << BH_NILFS_Node) | \
- (1UL << BH_NILFS_Volatile) | (1UL << BH_NILFS_Checked))
+#define NILFS_BUFFER_INHERENT_BITS \
+ (BIT(BH_Uptodate) | BIT(BH_Mapped) | BIT(BH_NILFS_Node) | \
+ BIT(BH_NILFS_Volatile) | BIT(BH_NILFS_Checked))
static struct buffer_head *
__nilfs_get_page_block(struct page *page, unsigned long block, pgoff_t index,
@@ -85,9 +85,9 @@ void nilfs_forget_buffer(struct buffer_head *bh)
{
struct page *page = bh->b_page;
const unsigned long clear_bits =
- (1 << BH_Uptodate | 1 << BH_Dirty | 1 << BH_Mapped |
- 1 << BH_Async_Write | 1 << BH_NILFS_Volatile |
- 1 << BH_NILFS_Checked | 1 << BH_NILFS_Redirected);
+ (BIT(BH_Uptodate) | BIT(BH_Dirty) | BIT(BH_Mapped) |
+ BIT(BH_Async_Write) | BIT(BH_NILFS_Volatile) |
+ BIT(BH_NILFS_Checked) | BIT(BH_NILFS_Redirected));
lock_buffer(bh);
set_mask_bits(&bh->b_state, clear_bits, 0);
@@ -124,17 +124,17 @@ void nilfs_copy_buffer(struct buffer_head *dbh, struct buffer_head *sbh)
dbh->b_bdev = sbh->b_bdev;
bh = dbh;
- bits = sbh->b_state & ((1UL << BH_Uptodate) | (1UL << BH_Mapped));
+ bits = sbh->b_state & (BIT(BH_Uptodate) | BIT(BH_Mapped));
while ((bh = bh->b_this_page) != dbh) {
lock_buffer(bh);
bits &= bh->b_state;
unlock_buffer(bh);
}
- if (bits & (1UL << BH_Uptodate))
+ if (bits & BIT(BH_Uptodate))
SetPageUptodate(dpage);
else
ClearPageUptodate(dpage);
- if (bits & (1UL << BH_Mapped))
+ if (bits & BIT(BH_Mapped))
SetPageMappedToDisk(dpage);
else
ClearPageMappedToDisk(dpage);
@@ -215,7 +215,7 @@ static void nilfs_copy_page(struct page *dst, struct page *src, int copy_dirty)
create_empty_buffers(dst, sbh->b_size, 0);
if (copy_dirty)
- mask |= (1UL << BH_Dirty);
+ mask |= BIT(BH_Dirty);
dbh = dbufs = page_buffers(dst);
do {
@@ -414,9 +414,9 @@ void nilfs_clear_dirty_page(struct page *page, bool silent)
if (page_has_buffers(page)) {
struct buffer_head *bh, *head;
const unsigned long clear_bits =
- (1 << BH_Uptodate | 1 << BH_Dirty | 1 << BH_Mapped |
- 1 << BH_Async_Write | 1 << BH_NILFS_Volatile |
- 1 << BH_NILFS_Checked | 1 << BH_NILFS_Redirected);
+ (BIT(BH_Uptodate) | BIT(BH_Dirty) | BIT(BH_Mapped) |
+ BIT(BH_Async_Write) | BIT(BH_NILFS_Volatile) |
+ BIT(BH_NILFS_Checked) | BIT(BH_NILFS_Redirected));
bh = head = page_buffers(page);
do {
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 5a97282..bedcae2 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1858,11 +1858,11 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci)
*/
list_for_each_entry(bh, &segbuf->sb_payload_buffers,
b_assoc_buffers) {
- const unsigned long set_bits = (1 << BH_Uptodate);
+ const unsigned long set_bits = BIT(BH_Uptodate);
const unsigned long clear_bits =
- (1 << BH_Dirty | 1 << BH_Async_Write |
- 1 << BH_Delay | 1 << BH_NILFS_Volatile |
- 1 << BH_NILFS_Redirected);
+ (BIT(BH_Dirty) | BIT(BH_Async_Write) |
+ BIT(BH_Delay) | BIT(BH_NILFS_Volatile) |
+ BIT(BH_NILFS_Redirected));
set_mask_bits(&bh->b_state, clear_bits, set_bits);
if (bh == segbuf->sb_super_root) {
@@ -2132,10 +2132,10 @@ static void nilfs_segctor_start_timer(struct nilfs_sc_info *sci)
static void nilfs_segctor_do_flush(struct nilfs_sc_info *sci, int bn)
{
spin_lock(&sci->sc_state_lock);
- if (!(sci->sc_flush_request & (1 << bn))) {
+ if (!(sci->sc_flush_request & BIT(bn))) {
unsigned long prev_req = sci->sc_flush_request;
- sci->sc_flush_request |= (1 << bn);
+ sci->sc_flush_request |= BIT(bn);
if (!prev_req)
wake_up(&sci->sc_wait_daemon);
}
@@ -2319,7 +2319,7 @@ int nilfs_construct_dsync_segment(struct super_block *sb, struct inode *inode,
}
#define FLUSH_FILE_BIT (0x1) /* data file only */
-#define FLUSH_DAT_BIT (1 << NILFS_DAT_INO) /* DAT only */
+#define FLUSH_DAT_BIT BIT(NILFS_DAT_INO) /* DAT only */
/**
* nilfs_segctor_accept - record accepted sequence count of log-write requests
diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c
index 5b495c4..12d11de 100644
--- a/fs/nilfs2/sufile.c
+++ b/fs/nilfs2/sufile.c
@@ -446,7 +446,7 @@ void nilfs_sufile_do_scrap(struct inode *sufile, __u64 segnum,
kaddr = kmap_atomic(su_bh->b_page);
su = nilfs_sufile_block_get_segment_usage(sufile, segnum, su_bh, kaddr);
- if (su->su_flags == cpu_to_le32(1UL << NILFS_SEGMENT_USAGE_DIRTY) &&
+ if (su->su_flags == cpu_to_le32(BIT(NILFS_SEGMENT_USAGE_DIRTY)) &&
su->su_nblocks == cpu_to_le32(0)) {
kunmap_atomic(kaddr);
return;
@@ -457,7 +457,7 @@ void nilfs_sufile_do_scrap(struct inode *sufile, __u64 segnum,
/* make the segment garbage */
su->su_lastmod = cpu_to_le64(0);
su->su_nblocks = cpu_to_le32(0);
- su->su_flags = cpu_to_le32(1UL << NILFS_SEGMENT_USAGE_DIRTY);
+ su->su_flags = cpu_to_le32(BIT(NILFS_SEGMENT_USAGE_DIRTY));
kunmap_atomic(kaddr);
nilfs_sufile_mod_counter(header_bh, clean ? (u64)-1 : 0, dirty ? 0 : 1);
@@ -695,7 +695,7 @@ static int nilfs_sufile_truncate_range(struct inode *sufile,
su2 = su;
for (j = 0; j < n; j++, su = (void *)su + susz) {
if ((le32_to_cpu(su->su_flags) &
- ~(1UL << NILFS_SEGMENT_USAGE_ERROR)) ||
+ ~BIT(NILFS_SEGMENT_USAGE_ERROR)) ||
nilfs_segment_is_active(nilfs, segnum + j)) {
ret = -EBUSY;
kunmap_atomic(kaddr);
@@ -862,10 +862,10 @@ ssize_t nilfs_sufile_get_suinfo(struct inode *sufile, __u64 segnum, void *buf,
si->sui_lastmod = le64_to_cpu(su->su_lastmod);
si->sui_nblocks = le32_to_cpu(su->su_nblocks);
si->sui_flags = le32_to_cpu(su->su_flags) &
- ~(1UL << NILFS_SEGMENT_USAGE_ACTIVE);
+ ~BIT(NILFS_SEGMENT_USAGE_ACTIVE);
if (nilfs_segment_is_active(nilfs, segnum + j))
si->sui_flags |=
- (1UL << NILFS_SEGMENT_USAGE_ACTIVE);
+ BIT(NILFS_SEGMENT_USAGE_ACTIVE);
}
kunmap_atomic(kaddr);
brelse(su_bh);
@@ -953,7 +953,7 @@ ssize_t nilfs_sufile_set_suinfo(struct inode *sufile, void *buf,
* disk.
*/
sup->sup_sui.sui_flags &=
- ~(1UL << NILFS_SEGMENT_USAGE_ACTIVE);
+ ~BIT(NILFS_SEGMENT_USAGE_ACTIVE);
cleansi = nilfs_suinfo_clean(&sup->sup_sui);
cleansu = nilfs_segment_usage_clean(su);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH 3/3] nilfs2: move ioctl interface and disk layout to uapi separately
2016-06-13 13:45 [PATCH 0/3] nilfs2 additional updates Ryusuke Konishi
2016-06-13 13:45 ` [PATCH 1/3] nilfs2: fix misuse of a semaphore in sysfs code Ryusuke Konishi
2016-06-13 13:45 ` [PATCH 2/3] nilfs2: use BIT() macro Ryusuke Konishi
@ 2016-06-13 13:45 ` Ryusuke Konishi
2016-06-14 22:29 ` Andrew Morton
2 siblings, 1 reply; 7+ messages in thread
From: Ryusuke Konishi @ 2016-06-13 13:45 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-nilfs, LKML, Ryusuke Konishi
The header file "include/linux/nilfs2_fs.h" is composed of parts for
ioctl and disk format, and both are intended to be shared with user
space programs.
This moves them to the uapi directory "include/uapi/linux" splitting
the file to "nilfs2_api.h" and "nilfs2_ondisk.h". The following minor
changes are accompanied by this migration:
- nilfs_direct_node struct in nilfs2/direct.h is converged to
nilfs2_ondisk.h because it's an on-disk structure.
- inline functions nilfs_rec_len_from_disk() and
nilfs_rec_len_to_disk() are moved to nilfs2/dir.c.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
---
Documentation/filesystems/nilfs2.txt | 3 +-
Documentation/ioctl/ioctl-number.txt | 2 +-
MAINTAINERS | 3 +-
fs/nilfs2/bmap.h | 2 +-
fs/nilfs2/btree.h | 2 +-
fs/nilfs2/cpfile.c | 1 -
fs/nilfs2/cpfile.h | 3 +-
fs/nilfs2/dat.h | 1 +
fs/nilfs2/dir.c | 22 +
fs/nilfs2/direct.h | 10 -
fs/nilfs2/ifile.h | 1 -
fs/nilfs2/ioctl.c | 1 -
fs/nilfs2/nilfs.h | 3 +-
fs/nilfs2/segment.h | 1 -
fs/nilfs2/sufile.c | 1 -
fs/nilfs2/sufile.h | 1 -
include/linux/nilfs2_fs.h | 934 -----------------------------------
include/uapi/linux/nilfs2_api.h | 292 +++++++++++
include/uapi/linux/nilfs2_ondisk.h | 650 ++++++++++++++++++++++++
19 files changed, 976 insertions(+), 957 deletions(-)
delete mode 100644 include/linux/nilfs2_fs.h
create mode 100644 include/uapi/linux/nilfs2_api.h
create mode 100644 include/uapi/linux/nilfs2_ondisk.h
diff --git a/Documentation/filesystems/nilfs2.txt b/Documentation/filesystems/nilfs2.txt
index 5b21ef7..c0727dc 100644
--- a/Documentation/filesystems/nilfs2.txt
+++ b/Documentation/filesystems/nilfs2.txt
@@ -267,7 +267,8 @@ among NILFS2 files can be depicted as follows:
`-- file (ino=yy)
( regular file, directory, or symlink )
-For detail on the format of each file, please see include/linux/nilfs2_fs.h.
+For detail on the format of each file, please see nilfs2_ondisk.h
+located at include/uapi/linux directory.
There are no patents or other intellectual property that we protect
with regard to the design of NILFS2. It is allowed to replicate the
diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index 9369d3b..26562a1 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -248,7 +248,7 @@ Code Seq#(hex) Include File Comments
'm' 00 drivers/scsi/megaraid/megaraid_ioctl.h conflict!
'm' 00-1F net/irda/irmod.h conflict!
'n' 00-7F linux/ncp_fs.h and fs/ncpfs/ioctl.c
-'n' 80-8F linux/nilfs2_fs.h NILFS2
+'n' 80-8F uapi/linux/nilfs2_api.h NILFS2
'n' E0-FF linux/matroxfb.h matroxfb
'o' 00-1F fs/ocfs2/ocfs2_fs.h OCFS2
'o' 00-03 mtd/ubi-user.h conflict! (OCFS2 and UBI overlaps)
diff --git a/MAINTAINERS b/MAINTAINERS
index 16700e4..8a94fba 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8065,8 +8065,9 @@ T: git git://github.com/konis/nilfs2.git
S: Supported
F: Documentation/filesystems/nilfs2.txt
F: fs/nilfs2/
-F: include/linux/nilfs2_fs.h
F: include/trace/events/nilfs2.h
+F: include/uapi/linux/nilfs2_api.h
+F: include/uapi/linux/nilfs2_ondisk.h
NINJA SCSI-3 / NINJA SCSI-32Bi (16bit/CardBus) PCMCIA SCSI HOST ADAPTER DRIVER
M: YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>
diff --git a/fs/nilfs2/bmap.h b/fs/nilfs2/bmap.h
index b6a4c8f..2b6ffbe 100644
--- a/fs/nilfs2/bmap.h
+++ b/fs/nilfs2/bmap.h
@@ -22,7 +22,7 @@
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_ondisk.h> /* nilfs_binfo, nilfs_inode, etc */
#include "alloc.h"
#include "dat.h"
diff --git a/fs/nilfs2/btree.h b/fs/nilfs2/btree.h
index df1a25f..2184e47 100644
--- a/fs/nilfs2/btree.h
+++ b/fs/nilfs2/btree.h
@@ -22,7 +22,7 @@
#include <linux/types.h>
#include <linux/buffer_head.h>
#include <linux/list.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_ondisk.h> /* nilfs_btree_node */
#include "btnode.h"
#include "bmap.h"
diff --git a/fs/nilfs2/cpfile.c b/fs/nilfs2/cpfile.c
index 19d9f4a..a15a160 100644
--- a/fs/nilfs2/cpfile.c
+++ b/fs/nilfs2/cpfile.c
@@ -21,7 +21,6 @@
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <linux/errno.h>
-#include <linux/nilfs2_fs.h>
#include "mdt.h"
#include "cpfile.h"
diff --git a/fs/nilfs2/cpfile.h b/fs/nilfs2/cpfile.h
index 0249744..6eca972 100644
--- a/fs/nilfs2/cpfile.h
+++ b/fs/nilfs2/cpfile.h
@@ -21,7 +21,8 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_api.h> /* nilfs_cpstat */
+#include <linux/nilfs2_ondisk.h> /* nilfs_inode, nilfs_checkpoint */
int nilfs_cpfile_get_checkpoint(struct inode *, __u64, int,
diff --git a/fs/nilfs2/dat.h b/fs/nilfs2/dat.h
index abbfdab..57dc6cf 100644
--- a/fs/nilfs2/dat.h
+++ b/fs/nilfs2/dat.h
@@ -22,6 +22,7 @@
#include <linux/types.h>
#include <linux/buffer_head.h>
#include <linux/fs.h>
+#include <linux/nilfs2_ondisk.h> /* nilfs_inode, nilfs_checkpoint */
struct nilfs_palloc_req;
diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index 746956d..908ebbf 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -42,6 +42,28 @@
#include "nilfs.h"
#include "page.h"
+static inline unsigned int nilfs_rec_len_from_disk(__le16 dlen)
+{
+ unsigned int len = le16_to_cpu(dlen);
+
+#if (PAGE_SIZE >= 65536)
+ if (len == NILFS_MAX_REC_LEN)
+ return 1 << 16;
+#endif
+ return len;
+}
+
+static inline __le16 nilfs_rec_len_to_disk(unsigned int len)
+{
+#if (PAGE_SIZE >= 65536)
+ if (len == (1 << 16))
+ return cpu_to_le16(NILFS_MAX_REC_LEN);
+
+ BUG_ON(len > (1 << 16));
+#endif
+ return cpu_to_le16(len);
+}
+
/*
* nilfs uses block-sized chunks. Arguably, sector-sized ones would be
* more robust, but we have what we have
diff --git a/fs/nilfs2/direct.h b/fs/nilfs2/direct.h
index 3015a6e..cfe85e8 100644
--- a/fs/nilfs2/direct.h
+++ b/fs/nilfs2/direct.h
@@ -24,16 +24,6 @@
#include "bmap.h"
-/**
- * struct nilfs_direct_node - direct node
- * @dn_flags: flags
- * @dn_pad: padding
- */
-struct nilfs_direct_node {
- __u8 dn_flags;
- __u8 pad[7];
-};
-
#define NILFS_DIRECT_NBLOCKS (NILFS_BMAP_SIZE / sizeof(__le64) - 1)
#define NILFS_DIRECT_KEY_MIN 0
#define NILFS_DIRECT_KEY_MAX (NILFS_DIRECT_NBLOCKS - 1)
diff --git a/fs/nilfs2/ifile.h b/fs/nilfs2/ifile.h
index 23ad2f0..188b94f 100644
--- a/fs/nilfs2/ifile.h
+++ b/fs/nilfs2/ifile.h
@@ -23,7 +23,6 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
#include "mdt.h"
#include "alloc.h"
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index 827283f..f1d7989 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -25,7 +25,6 @@
#include <linux/compat.h> /* compat_ptr() */
#include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */
#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
#include "nilfs.h"
#include "segment.h"
#include "bmap.h"
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index c6b6960..7fcb1b8 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -23,7 +23,8 @@
#include <linux/buffer_head.h>
#include <linux/spinlock.h>
#include <linux/blkdev.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_api.h>
+#include <linux/nilfs2_ondisk.h>
#include "the_nilfs.h"
#include "bmap.h"
diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h
index 6565c10..1060949 100644
--- a/fs/nilfs2/segment.h
+++ b/fs/nilfs2/segment.h
@@ -23,7 +23,6 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/workqueue.h>
-#include <linux/nilfs2_fs.h>
#include "nilfs.h"
struct nilfs_root;
diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c
index 12d11de..1541a1e 100644
--- a/fs/nilfs2/sufile.c
+++ b/fs/nilfs2/sufile.c
@@ -22,7 +22,6 @@
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <linux/errno.h>
-#include <linux/nilfs2_fs.h>
#include "mdt.h"
#include "sufile.h"
diff --git a/fs/nilfs2/sufile.h b/fs/nilfs2/sufile.h
index 46e8987..158a919 100644
--- a/fs/nilfs2/sufile.h
+++ b/fs/nilfs2/sufile.h
@@ -21,7 +21,6 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
#include "mdt.h"
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h
deleted file mode 100644
index 5988dd5..0000000
--- a/include/linux/nilfs2_fs.h
+++ /dev/null
@@ -1,934 +0,0 @@
-/*
- * nilfs2_fs.h - NILFS2 on-disk structures and common declarations.
- *
- * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * Written by Koji Sato and Ryusuke Konishi.
- */
-/*
- * linux/include/linux/ext2_fs.h
- *
- * Copyright (C) 1992, 1993, 1994, 1995
- * Remy Card (card@masi.ibp.fr)
- * Laboratoire MASI - Institut Blaise Pascal
- * Universite Pierre et Marie Curie (Paris VI)
- *
- * from
- *
- * linux/include/linux/minix_fs.h
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- */
-
-#ifndef _LINUX_NILFS_FS_H
-#define _LINUX_NILFS_FS_H
-
-#include <linux/types.h>
-#include <linux/ioctl.h>
-#include <linux/magic.h>
-#include <linux/bug.h>
-
-
-#define NILFS_INODE_BMAP_SIZE 7
-/**
- * struct nilfs_inode - structure of an inode on disk
- * @i_blocks: blocks count
- * @i_size: size in bytes
- * @i_ctime: creation time (seconds)
- * @i_mtime: modification time (seconds)
- * @i_ctime_nsec: creation time (nano seconds)
- * @i_mtime_nsec: modification time (nano seconds)
- * @i_uid: user id
- * @i_gid: group id
- * @i_mode: file mode
- * @i_links_count: links count
- * @i_flags: file flags
- * @i_bmap: block mapping
- * @i_xattr: extended attributes
- * @i_generation: file generation (for NFS)
- * @i_pad: padding
- */
-struct nilfs_inode {
- __le64 i_blocks;
- __le64 i_size;
- __le64 i_ctime;
- __le64 i_mtime;
- __le32 i_ctime_nsec;
- __le32 i_mtime_nsec;
- __le32 i_uid;
- __le32 i_gid;
- __le16 i_mode;
- __le16 i_links_count;
- __le32 i_flags;
- __le64 i_bmap[NILFS_INODE_BMAP_SIZE];
-#define i_device_code i_bmap[0]
- __le64 i_xattr;
- __le32 i_generation;
- __le32 i_pad;
-};
-
-#define NILFS_MIN_INODE_SIZE 128
-
-/**
- * struct nilfs_super_root - structure of super root
- * @sr_sum: check sum
- * @sr_bytes: byte count of the structure
- * @sr_flags: flags (reserved)
- * @sr_nongc_ctime: write time of the last segment not for cleaner operation
- * @sr_dat: DAT file inode
- * @sr_cpfile: checkpoint file inode
- * @sr_sufile: segment usage file inode
- */
-struct nilfs_super_root {
- __le32 sr_sum;
- __le16 sr_bytes;
- __le16 sr_flags;
- __le64 sr_nongc_ctime;
- struct nilfs_inode sr_dat;
- struct nilfs_inode sr_cpfile;
- struct nilfs_inode sr_sufile;
-};
-
-#define NILFS_SR_MDT_OFFSET(inode_size, i) \
- ((unsigned long)&((struct nilfs_super_root *)0)->sr_dat + \
- (inode_size) * (i))
-#define NILFS_SR_DAT_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 0)
-#define NILFS_SR_CPFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 1)
-#define NILFS_SR_SUFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 2)
-#define NILFS_SR_BYTES(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 3)
-
-/*
- * Maximal mount counts
- */
-#define NILFS_DFL_MAX_MNT_COUNT 50 /* 50 mounts */
-
-/*
- * File system states (sbp->s_state, nilfs->ns_mount_state)
- */
-#define NILFS_VALID_FS 0x0001 /* Unmounted cleanly */
-#define NILFS_ERROR_FS 0x0002 /* Errors detected */
-#define NILFS_RESIZE_FS 0x0004 /* Resize required */
-
-/*
- * Mount flags (sbi->s_mount_opt)
- */
-#define NILFS_MOUNT_ERROR_MODE 0x0070 /* Error mode mask */
-#define NILFS_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
-#define NILFS_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
-#define NILFS_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
-#define NILFS_MOUNT_BARRIER 0x1000 /* Use block barriers */
-#define NILFS_MOUNT_STRICT_ORDER 0x2000 /*
- * Apply strict in-order
- * semantics also for data
- */
-#define NILFS_MOUNT_NORECOVERY 0x4000 /*
- * Disable write access during
- * mount-time recovery
- */
-#define NILFS_MOUNT_DISCARD 0x8000 /* Issue DISCARD requests */
-
-
-/**
- * struct nilfs_super_block - structure of super block on disk
- */
-struct nilfs_super_block {
-/*00*/ __le32 s_rev_level; /* Revision level */
- __le16 s_minor_rev_level; /* minor revision level */
- __le16 s_magic; /* Magic signature */
-
- __le16 s_bytes; /*
- * Bytes count of CRC calculation
- * for this structure. s_reserved
- * is excluded.
- */
- __le16 s_flags; /* flags */
- __le32 s_crc_seed; /* Seed value of CRC calculation */
-/*10*/ __le32 s_sum; /* Check sum of super block */
-
- __le32 s_log_block_size; /*
- * Block size represented as follows
- * blocksize =
- * 1 << (s_log_block_size + 10)
- */
- __le64 s_nsegments; /* Number of segments in filesystem */
-/*20*/ __le64 s_dev_size; /* block device size in bytes */
- __le64 s_first_data_block; /* 1st seg disk block number */
-/*30*/ __le32 s_blocks_per_segment; /* number of blocks per full segment */
- __le32 s_r_segments_percentage; /* Reserved segments percentage */
-
- __le64 s_last_cno; /* Last checkpoint number */
-/*40*/ __le64 s_last_pseg; /* disk block addr pseg written last */
- __le64 s_last_seq; /* seq. number of seg written last */
-/*50*/ __le64 s_free_blocks_count; /* Free blocks count */
-
- __le64 s_ctime; /*
- * Creation time (execution time of
- * newfs)
- */
-/*60*/ __le64 s_mtime; /* Mount time */
- __le64 s_wtime; /* Write time */
-/*70*/ __le16 s_mnt_count; /* Mount count */
- __le16 s_max_mnt_count; /* Maximal mount count */
- __le16 s_state; /* File system state */
- __le16 s_errors; /* Behaviour when detecting errors */
- __le64 s_lastcheck; /* time of last check */
-
-/*80*/ __le32 s_checkinterval; /* max. time between checks */
- __le32 s_creator_os; /* OS */
- __le16 s_def_resuid; /* Default uid for reserved blocks */
- __le16 s_def_resgid; /* Default gid for reserved blocks */
- __le32 s_first_ino; /* First non-reserved inode */
-
-/*90*/ __le16 s_inode_size; /* Size of an inode */
- __le16 s_dat_entry_size; /* Size of a dat entry */
- __le16 s_checkpoint_size; /* Size of a checkpoint */
- __le16 s_segment_usage_size; /* Size of a segment usage */
-
-/*98*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
-/*A8*/ char s_volume_name[80]; /* volume name */
-
-/*F8*/ __le32 s_c_interval; /* Commit interval of segment */
- __le32 s_c_block_max; /*
- * Threshold of data amount for
- * the segment construction
- */
-/*100*/ __le64 s_feature_compat; /* Compatible feature set */
- __le64 s_feature_compat_ro; /* Read-only compatible feature set */
- __le64 s_feature_incompat; /* Incompatible feature set */
- __u32 s_reserved[186]; /* padding to the end of the block */
-};
-
-/*
- * Codes for operating systems
- */
-#define NILFS_OS_LINUX 0
-/* Codes from 1 to 4 are reserved to keep compatibility with ext2 creator-OS */
-
-/*
- * Revision levels
- */
-#define NILFS_CURRENT_REV 2 /* current major revision */
-#define NILFS_MINOR_REV 0 /* minor revision */
-#define NILFS_MIN_SUPP_REV 2 /* minimum supported revision */
-
-/*
- * Feature set definitions
- *
- * If there is a bit set in the incompatible feature set that the kernel
- * doesn't know about, it should refuse to mount the filesystem.
- */
-#define NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT 0x00000001ULL
-
-#define NILFS_FEATURE_COMPAT_SUPP 0ULL
-#define NILFS_FEATURE_COMPAT_RO_SUPP NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT
-#define NILFS_FEATURE_INCOMPAT_SUPP 0ULL
-
-/*
- * Bytes count of super_block for CRC-calculation
- */
-#define NILFS_SB_BYTES \
- ((long)&((struct nilfs_super_block *)0)->s_reserved)
-
-/*
- * Special inode number
- */
-#define NILFS_ROOT_INO 2 /* Root file inode */
-#define NILFS_DAT_INO 3 /* DAT file */
-#define NILFS_CPFILE_INO 4 /* checkpoint file */
-#define NILFS_SUFILE_INO 5 /* segment usage file */
-#define NILFS_IFILE_INO 6 /* ifile */
-#define NILFS_ATIME_INO 7 /* Atime file (reserved) */
-#define NILFS_XATTR_INO 8 /* Xattribute file (reserved) */
-#define NILFS_SKETCH_INO 10 /* Sketch file */
-#define NILFS_USER_INO 11 /* Fisrt user's file inode number */
-
-#define NILFS_SB_OFFSET_BYTES 1024 /* byte offset of nilfs superblock */
-
-#define NILFS_SEG_MIN_BLOCKS 16 /*
- * Minimum number of blocks in
- * a full segment
- */
-#define NILFS_PSEG_MIN_BLOCKS 2 /*
- * Minimum number of blocks in
- * a partial segment
- */
-#define NILFS_MIN_NRSVSEGS 8 /*
- * Minimum number of reserved
- * segments
- */
-
-/*
- * We call DAT, cpfile, and sufile root metadata files. Inodes of
- * these files are written in super root block instead of ifile, and
- * garbage collector doesn't keep any past versions of these files.
- */
-#define NILFS_ROOT_METADATA_FILE(ino) \
- ((ino) >= NILFS_DAT_INO && (ino) <= NILFS_SUFILE_INO)
-
-/*
- * bytes offset of secondary super block
- */
-#define NILFS_SB2_OFFSET_BYTES(devsize) ((((devsize) >> 12) - 1) << 12)
-
-/*
- * Maximal count of links to a file
- */
-#define NILFS_LINK_MAX 32000
-
-/*
- * Structure of a directory entry
- * (Same as ext2)
- */
-
-#define NILFS_NAME_LEN 255
-
-/*
- * Block size limitations
- */
-#define NILFS_MIN_BLOCK_SIZE 1024
-#define NILFS_MAX_BLOCK_SIZE 65536
-
-/*
- * The new version of the directory entry. Since V0 structures are
- * stored in intel byte order, and the name_len field could never be
- * bigger than 255 chars, it's safe to reclaim the extra byte for the
- * file_type field.
- */
-struct nilfs_dir_entry {
- __le64 inode; /* Inode number */
- __le16 rec_len; /* Directory entry length */
- __u8 name_len; /* Name length */
- __u8 file_type; /* Dir entry type (file, dir, etc) */
- char name[NILFS_NAME_LEN]; /* File name */
- char pad;
-};
-
-/*
- * NILFS directory file types. Only the low 3 bits are used. The
- * other bits are reserved for now.
- */
-enum {
- NILFS_FT_UNKNOWN,
- NILFS_FT_REG_FILE,
- NILFS_FT_DIR,
- NILFS_FT_CHRDEV,
- NILFS_FT_BLKDEV,
- NILFS_FT_FIFO,
- NILFS_FT_SOCK,
- NILFS_FT_SYMLINK,
- NILFS_FT_MAX
-};
-
-/*
- * NILFS_DIR_PAD defines the directory entries boundaries
- *
- * NOTE: It must be a multiple of 8
- */
-#define NILFS_DIR_PAD 8
-#define NILFS_DIR_ROUND (NILFS_DIR_PAD - 1)
-#define NILFS_DIR_REC_LEN(name_len) (((name_len) + 12 + NILFS_DIR_ROUND) & \
- ~NILFS_DIR_ROUND)
-#define NILFS_MAX_REC_LEN ((1<<16)-1)
-
-static inline unsigned int nilfs_rec_len_from_disk(__le16 dlen)
-{
- unsigned int len = le16_to_cpu(dlen);
-
-#if !defined(__KERNEL__) || (PAGE_SIZE >= 65536)
- if (len == NILFS_MAX_REC_LEN)
- return 1 << 16;
-#endif
- return len;
-}
-
-static inline __le16 nilfs_rec_len_to_disk(unsigned int len)
-{
-#if !defined(__KERNEL__) || (PAGE_SIZE >= 65536)
- if (len == (1 << 16))
- return cpu_to_le16(NILFS_MAX_REC_LEN);
- else if (len > (1 << 16))
- BUG();
-#endif
- return cpu_to_le16(len);
-}
-
-/**
- * struct nilfs_finfo - file information
- * @fi_ino: inode number
- * @fi_cno: checkpoint number
- * @fi_nblocks: number of blocks (including intermediate blocks)
- * @fi_ndatablk: number of file data blocks
- */
-struct nilfs_finfo {
- __le64 fi_ino;
- __le64 fi_cno;
- __le32 fi_nblocks;
- __le32 fi_ndatablk;
- /* array of virtual block numbers */
-};
-
-/**
- * struct nilfs_binfo_v - information for the block to which a virtual block number is assigned
- * @bi_vblocknr: virtual block number
- * @bi_blkoff: block offset
- */
-struct nilfs_binfo_v {
- __le64 bi_vblocknr;
- __le64 bi_blkoff;
-};
-
-/**
- * struct nilfs_binfo_dat - information for the block which belongs to the DAT file
- * @bi_blkoff: block offset
- * @bi_level: level
- * @bi_pad: padding
- */
-struct nilfs_binfo_dat {
- __le64 bi_blkoff;
- __u8 bi_level;
- __u8 bi_pad[7];
-};
-
-/**
- * union nilfs_binfo: block information
- * @bi_v: nilfs_binfo_v structure
- * @bi_dat: nilfs_binfo_dat structure
- */
-union nilfs_binfo {
- struct nilfs_binfo_v bi_v;
- struct nilfs_binfo_dat bi_dat;
-};
-
-/**
- * struct nilfs_segment_summary - segment summary header
- * @ss_datasum: checksum of data
- * @ss_sumsum: checksum of segment summary
- * @ss_magic: magic number
- * @ss_bytes: size of this structure in bytes
- * @ss_flags: flags
- * @ss_seq: sequence number
- * @ss_create: creation timestamp
- * @ss_next: next segment
- * @ss_nblocks: number of blocks
- * @ss_nfinfo: number of finfo structures
- * @ss_sumbytes: total size of segment summary in bytes
- * @ss_pad: padding
- * @ss_cno: checkpoint number
- */
-struct nilfs_segment_summary {
- __le32 ss_datasum;
- __le32 ss_sumsum;
- __le32 ss_magic;
- __le16 ss_bytes;
- __le16 ss_flags;
- __le64 ss_seq;
- __le64 ss_create;
- __le64 ss_next;
- __le32 ss_nblocks;
- __le32 ss_nfinfo;
- __le32 ss_sumbytes;
- __le32 ss_pad;
- __le64 ss_cno;
- /* array of finfo structures */
-};
-
-#define NILFS_SEGSUM_MAGIC 0x1eaffa11 /* segment summary magic number */
-
-/*
- * Segment summary flags
- */
-#define NILFS_SS_LOGBGN 0x0001 /* begins a logical segment */
-#define NILFS_SS_LOGEND 0x0002 /* ends a logical segment */
-#define NILFS_SS_SR 0x0004 /* has super root */
-#define NILFS_SS_SYNDT 0x0008 /* includes data only updates */
-#define NILFS_SS_GC 0x0010 /* segment written for cleaner operation */
-
-/**
- * struct nilfs_btree_node - B-tree node
- * @bn_flags: flags
- * @bn_level: level
- * @bn_nchildren: number of children
- * @bn_pad: padding
- */
-struct nilfs_btree_node {
- __u8 bn_flags;
- __u8 bn_level;
- __le16 bn_nchildren;
- __le32 bn_pad;
-};
-
-/* flags */
-#define NILFS_BTREE_NODE_ROOT 0x01
-
-/* level */
-#define NILFS_BTREE_LEVEL_DATA 0
-#define NILFS_BTREE_LEVEL_NODE_MIN (NILFS_BTREE_LEVEL_DATA + 1)
-#define NILFS_BTREE_LEVEL_MAX 14 /* Max level (exclusive) */
-
-/**
- * struct nilfs_palloc_group_desc - block group descriptor
- * @pg_nfrees: number of free entries in block group
- */
-struct nilfs_palloc_group_desc {
- __le32 pg_nfrees;
-};
-
-/**
- * struct nilfs_dat_entry - disk address translation entry
- * @de_blocknr: block number
- * @de_start: start checkpoint number
- * @de_end: end checkpoint number
- * @de_rsv: reserved for future use
- */
-struct nilfs_dat_entry {
- __le64 de_blocknr;
- __le64 de_start;
- __le64 de_end;
- __le64 de_rsv;
-};
-
-#define NILFS_MIN_DAT_ENTRY_SIZE 32
-
-/**
- * struct nilfs_snapshot_list - snapshot list
- * @ssl_next: next checkpoint number on snapshot list
- * @ssl_prev: previous checkpoint number on snapshot list
- */
-struct nilfs_snapshot_list {
- __le64 ssl_next;
- __le64 ssl_prev;
-};
-
-/**
- * struct nilfs_checkpoint - checkpoint structure
- * @cp_flags: flags
- * @cp_checkpoints_count: checkpoints count in a block
- * @cp_snapshot_list: snapshot list
- * @cp_cno: checkpoint number
- * @cp_create: creation timestamp
- * @cp_nblk_inc: number of blocks incremented by this checkpoint
- * @cp_inodes_count: inodes count
- * @cp_blocks_count: blocks count
- * @cp_ifile_inode: inode of ifile
- */
-struct nilfs_checkpoint {
- __le32 cp_flags;
- __le32 cp_checkpoints_count;
- struct nilfs_snapshot_list cp_snapshot_list;
- __le64 cp_cno;
- __le64 cp_create;
- __le64 cp_nblk_inc;
- __le64 cp_inodes_count;
- __le64 cp_blocks_count;
-
- /*
- * Do not change the byte offset of ifile inode.
- * To keep the compatibility of the disk format,
- * additional fields should be added behind cp_ifile_inode.
- */
- struct nilfs_inode cp_ifile_inode;
-};
-
-#define NILFS_MIN_CHECKPOINT_SIZE (64 + NILFS_MIN_INODE_SIZE)
-
-/* checkpoint flags */
-enum {
- NILFS_CHECKPOINT_SNAPSHOT,
- NILFS_CHECKPOINT_INVALID,
- NILFS_CHECKPOINT_SKETCH,
- NILFS_CHECKPOINT_MINOR,
-};
-
-#define NILFS_CHECKPOINT_FNS(flag, name) \
-static inline void \
-nilfs_checkpoint_set_##name(struct nilfs_checkpoint *cp) \
-{ \
- cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) | \
- (1UL << NILFS_CHECKPOINT_##flag)); \
-} \
-static inline void \
-nilfs_checkpoint_clear_##name(struct nilfs_checkpoint *cp) \
-{ \
- cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) & \
- ~(1UL << NILFS_CHECKPOINT_##flag)); \
-} \
-static inline int \
-nilfs_checkpoint_##name(const struct nilfs_checkpoint *cp) \
-{ \
- return !!(le32_to_cpu(cp->cp_flags) & \
- (1UL << NILFS_CHECKPOINT_##flag)); \
-}
-
-NILFS_CHECKPOINT_FNS(SNAPSHOT, snapshot)
-NILFS_CHECKPOINT_FNS(INVALID, invalid)
-NILFS_CHECKPOINT_FNS(MINOR, minor)
-
-/**
- * struct nilfs_cpinfo - checkpoint information
- * @ci_flags: flags
- * @ci_pad: padding
- * @ci_cno: checkpoint number
- * @ci_create: creation timestamp
- * @ci_nblk_inc: number of blocks incremented by this checkpoint
- * @ci_inodes_count: inodes count
- * @ci_blocks_count: blocks count
- * @ci_next: next checkpoint number in snapshot list
- */
-struct nilfs_cpinfo {
- __u32 ci_flags;
- __u32 ci_pad;
- __u64 ci_cno;
- __u64 ci_create;
- __u64 ci_nblk_inc;
- __u64 ci_inodes_count;
- __u64 ci_blocks_count;
- __u64 ci_next;
-};
-
-#define NILFS_CPINFO_FNS(flag, name) \
-static inline int \
-nilfs_cpinfo_##name(const struct nilfs_cpinfo *cpinfo) \
-{ \
- return !!(cpinfo->ci_flags & (1UL << NILFS_CHECKPOINT_##flag)); \
-}
-
-NILFS_CPINFO_FNS(SNAPSHOT, snapshot)
-NILFS_CPINFO_FNS(INVALID, invalid)
-NILFS_CPINFO_FNS(MINOR, minor)
-
-
-/**
- * struct nilfs_cpfile_header - checkpoint file header
- * @ch_ncheckpoints: number of checkpoints
- * @ch_nsnapshots: number of snapshots
- * @ch_snapshot_list: snapshot list
- */
-struct nilfs_cpfile_header {
- __le64 ch_ncheckpoints;
- __le64 ch_nsnapshots;
- struct nilfs_snapshot_list ch_snapshot_list;
-};
-
-#define NILFS_CPFILE_FIRST_CHECKPOINT_OFFSET \
- ((sizeof(struct nilfs_cpfile_header) + \
- sizeof(struct nilfs_checkpoint) - 1) / \
- sizeof(struct nilfs_checkpoint))
-
-/**
- * struct nilfs_segment_usage - segment usage
- * @su_lastmod: last modified timestamp
- * @su_nblocks: number of blocks in segment
- * @su_flags: flags
- */
-struct nilfs_segment_usage {
- __le64 su_lastmod;
- __le32 su_nblocks;
- __le32 su_flags;
-};
-
-#define NILFS_MIN_SEGMENT_USAGE_SIZE 16
-
-/* segment usage flag */
-enum {
- NILFS_SEGMENT_USAGE_ACTIVE,
- NILFS_SEGMENT_USAGE_DIRTY,
- NILFS_SEGMENT_USAGE_ERROR,
-
- /* ... */
-};
-
-#define NILFS_SEGMENT_USAGE_FNS(flag, name) \
-static inline void \
-nilfs_segment_usage_set_##name(struct nilfs_segment_usage *su) \
-{ \
- su->su_flags = cpu_to_le32(le32_to_cpu(su->su_flags) | \
- (1UL << NILFS_SEGMENT_USAGE_##flag));\
-} \
-static inline void \
-nilfs_segment_usage_clear_##name(struct nilfs_segment_usage *su) \
-{ \
- su->su_flags = \
- cpu_to_le32(le32_to_cpu(su->su_flags) & \
- ~(1UL << NILFS_SEGMENT_USAGE_##flag)); \
-} \
-static inline int \
-nilfs_segment_usage_##name(const struct nilfs_segment_usage *su) \
-{ \
- return !!(le32_to_cpu(su->su_flags) & \
- (1UL << NILFS_SEGMENT_USAGE_##flag)); \
-}
-
-NILFS_SEGMENT_USAGE_FNS(ACTIVE, active)
-NILFS_SEGMENT_USAGE_FNS(DIRTY, dirty)
-NILFS_SEGMENT_USAGE_FNS(ERROR, error)
-
-static inline void
-nilfs_segment_usage_set_clean(struct nilfs_segment_usage *su)
-{
- su->su_lastmod = cpu_to_le64(0);
- su->su_nblocks = cpu_to_le32(0);
- su->su_flags = cpu_to_le32(0);
-}
-
-static inline int
-nilfs_segment_usage_clean(const struct nilfs_segment_usage *su)
-{
- return !le32_to_cpu(su->su_flags);
-}
-
-/**
- * struct nilfs_sufile_header - segment usage file header
- * @sh_ncleansegs: number of clean segments
- * @sh_ndirtysegs: number of dirty segments
- * @sh_last_alloc: last allocated segment number
- */
-struct nilfs_sufile_header {
- __le64 sh_ncleansegs;
- __le64 sh_ndirtysegs;
- __le64 sh_last_alloc;
- /* ... */
-};
-
-#define NILFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET \
- ((sizeof(struct nilfs_sufile_header) + \
- sizeof(struct nilfs_segment_usage) - 1) / \
- sizeof(struct nilfs_segment_usage))
-
-/**
- * nilfs_suinfo - segment usage information
- * @sui_lastmod: timestamp of last modification
- * @sui_nblocks: number of written blocks in segment
- * @sui_flags: segment usage flags
- */
-struct nilfs_suinfo {
- __u64 sui_lastmod;
- __u32 sui_nblocks;
- __u32 sui_flags;
-};
-
-#define NILFS_SUINFO_FNS(flag, name) \
-static inline int \
-nilfs_suinfo_##name(const struct nilfs_suinfo *si) \
-{ \
- return si->sui_flags & (1UL << NILFS_SEGMENT_USAGE_##flag); \
-}
-
-NILFS_SUINFO_FNS(ACTIVE, active)
-NILFS_SUINFO_FNS(DIRTY, dirty)
-NILFS_SUINFO_FNS(ERROR, error)
-
-static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si)
-{
- return !si->sui_flags;
-}
-
-/* ioctl */
-/**
- * nilfs_suinfo_update - segment usage information update
- * @sup_segnum: segment number
- * @sup_flags: flags for which fields are active in sup_sui
- * @sup_reserved: reserved necessary for alignment
- * @sup_sui: segment usage information
- */
-struct nilfs_suinfo_update {
- __u64 sup_segnum;
- __u32 sup_flags;
- __u32 sup_reserved;
- struct nilfs_suinfo sup_sui;
-};
-
-enum {
- NILFS_SUINFO_UPDATE_LASTMOD,
- NILFS_SUINFO_UPDATE_NBLOCKS,
- NILFS_SUINFO_UPDATE_FLAGS,
- __NR_NILFS_SUINFO_UPDATE_FIELDS,
-};
-
-#define NILFS_SUINFO_UPDATE_FNS(flag, name) \
-static inline void \
-nilfs_suinfo_update_set_##name(struct nilfs_suinfo_update *sup) \
-{ \
- sup->sup_flags |= 1UL << NILFS_SUINFO_UPDATE_##flag; \
-} \
-static inline void \
-nilfs_suinfo_update_clear_##name(struct nilfs_suinfo_update *sup) \
-{ \
- sup->sup_flags &= ~(1UL << NILFS_SUINFO_UPDATE_##flag); \
-} \
-static inline int \
-nilfs_suinfo_update_##name(const struct nilfs_suinfo_update *sup) \
-{ \
- return !!(sup->sup_flags & (1UL << NILFS_SUINFO_UPDATE_##flag));\
-}
-
-NILFS_SUINFO_UPDATE_FNS(LASTMOD, lastmod)
-NILFS_SUINFO_UPDATE_FNS(NBLOCKS, nblocks)
-NILFS_SUINFO_UPDATE_FNS(FLAGS, flags)
-
-enum {
- NILFS_CHECKPOINT,
- NILFS_SNAPSHOT,
-};
-
-/**
- * struct nilfs_cpmode - change checkpoint mode structure
- * @cm_cno: checkpoint number
- * @cm_mode: mode of checkpoint
- * @cm_pad: padding
- */
-struct nilfs_cpmode {
- __u64 cm_cno;
- __u32 cm_mode;
- __u32 cm_pad;
-};
-
-/**
- * struct nilfs_argv - argument vector
- * @v_base: pointer on data array from userspace
- * @v_nmembs: number of members in data array
- * @v_size: size of data array in bytes
- * @v_flags: flags
- * @v_index: start number of target data items
- */
-struct nilfs_argv {
- __u64 v_base;
- __u32 v_nmembs; /* number of members */
- __u16 v_size; /* size of members */
- __u16 v_flags;
- __u64 v_index;
-};
-
-/**
- * struct nilfs_period - period of checkpoint numbers
- * @p_start: start checkpoint number (inclusive)
- * @p_end: end checkpoint number (exclusive)
- */
-struct nilfs_period {
- __u64 p_start;
- __u64 p_end;
-};
-
-/**
- * struct nilfs_cpstat - checkpoint statistics
- * @cs_cno: checkpoint number
- * @cs_ncps: number of checkpoints
- * @cs_nsss: number of snapshots
- */
-struct nilfs_cpstat {
- __u64 cs_cno;
- __u64 cs_ncps;
- __u64 cs_nsss;
-};
-
-/**
- * struct nilfs_sustat - segment usage statistics
- * @ss_nsegs: number of segments
- * @ss_ncleansegs: number of clean segments
- * @ss_ndirtysegs: number of dirty segments
- * @ss_ctime: creation time of the last segment
- * @ss_nongc_ctime: creation time of the last segment not for GC
- * @ss_prot_seq: least sequence number of segments which must not be reclaimed
- */
-struct nilfs_sustat {
- __u64 ss_nsegs;
- __u64 ss_ncleansegs;
- __u64 ss_ndirtysegs;
- __u64 ss_ctime;
- __u64 ss_nongc_ctime;
- __u64 ss_prot_seq;
-};
-
-/**
- * struct nilfs_vinfo - virtual block number information
- * @vi_vblocknr: virtual block number
- * @vi_start: start checkpoint number (inclusive)
- * @vi_end: end checkpoint number (exclusive)
- * @vi_blocknr: disk block number
- */
-struct nilfs_vinfo {
- __u64 vi_vblocknr;
- __u64 vi_start;
- __u64 vi_end;
- __u64 vi_blocknr;
-};
-
-/**
- * struct nilfs_vdesc - descriptor of virtual block number
- * @vd_ino: inode number
- * @vd_cno: checkpoint number
- * @vd_vblocknr: virtual block number
- * @vd_period: period of checkpoint numbers
- * @vd_blocknr: disk block number
- * @vd_offset: logical block offset inside a file
- * @vd_flags: flags (data or node block)
- * @vd_pad: padding
- */
-struct nilfs_vdesc {
- __u64 vd_ino;
- __u64 vd_cno;
- __u64 vd_vblocknr;
- struct nilfs_period vd_period;
- __u64 vd_blocknr;
- __u64 vd_offset;
- __u32 vd_flags;
- __u32 vd_pad;
-};
-
-/**
- * struct nilfs_bdesc - descriptor of disk block number
- * @bd_ino: inode number
- * @bd_oblocknr: disk block address (for skipping dead blocks)
- * @bd_blocknr: disk block address
- * @bd_offset: logical block offset inside a file
- * @bd_level: level in the b-tree organization
- * @bd_pad: padding
- */
-struct nilfs_bdesc {
- __u64 bd_ino;
- __u64 bd_oblocknr;
- __u64 bd_blocknr;
- __u64 bd_offset;
- __u32 bd_level;
- __u32 bd_pad;
-};
-
-#define NILFS_IOCTL_IDENT 'n'
-
-#define NILFS_IOCTL_CHANGE_CPMODE \
- _IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode)
-#define NILFS_IOCTL_DELETE_CHECKPOINT \
- _IOW(NILFS_IOCTL_IDENT, 0x81, __u64)
-#define NILFS_IOCTL_GET_CPINFO \
- _IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv)
-#define NILFS_IOCTL_GET_CPSTAT \
- _IOR(NILFS_IOCTL_IDENT, 0x83, struct nilfs_cpstat)
-#define NILFS_IOCTL_GET_SUINFO \
- _IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv)
-#define NILFS_IOCTL_GET_SUSTAT \
- _IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat)
-#define NILFS_IOCTL_GET_VINFO \
- _IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv)
-#define NILFS_IOCTL_GET_BDESCS \
- _IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv)
-#define NILFS_IOCTL_CLEAN_SEGMENTS \
- _IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv[5])
-#define NILFS_IOCTL_SYNC \
- _IOR(NILFS_IOCTL_IDENT, 0x8A, __u64)
-#define NILFS_IOCTL_RESIZE \
- _IOW(NILFS_IOCTL_IDENT, 0x8B, __u64)
-#define NILFS_IOCTL_SET_ALLOC_RANGE \
- _IOW(NILFS_IOCTL_IDENT, 0x8C, __u64[2])
-#define NILFS_IOCTL_SET_SUINFO \
- _IOW(NILFS_IOCTL_IDENT, 0x8D, struct nilfs_argv)
-
-#endif /* _LINUX_NILFS_FS_H */
diff --git a/include/uapi/linux/nilfs2_api.h b/include/uapi/linux/nilfs2_api.h
new file mode 100644
index 0000000..ef4c1de
--- /dev/null
+++ b/include/uapi/linux/nilfs2_api.h
@@ -0,0 +1,292 @@
+/*
+ * nilfs2_api.h - NILFS2 user space API
+ *
+ * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _LINUX_NILFS2_API_H
+#define _LINUX_NILFS2_API_H
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+/**
+ * struct nilfs_cpinfo - checkpoint information
+ * @ci_flags: flags
+ * @ci_pad: padding
+ * @ci_cno: checkpoint number
+ * @ci_create: creation timestamp
+ * @ci_nblk_inc: number of blocks incremented by this checkpoint
+ * @ci_inodes_count: inodes count
+ * @ci_blocks_count: blocks count
+ * @ci_next: next checkpoint number in snapshot list
+ */
+struct nilfs_cpinfo {
+ __u32 ci_flags;
+ __u32 ci_pad;
+ __u64 ci_cno;
+ __u64 ci_create;
+ __u64 ci_nblk_inc;
+ __u64 ci_inodes_count;
+ __u64 ci_blocks_count;
+ __u64 ci_next;
+};
+
+/* checkpoint flags */
+enum {
+ NILFS_CPINFO_SNAPSHOT,
+ NILFS_CPINFO_INVALID,
+ NILFS_CPINFO_SKETCH,
+ NILFS_CPINFO_MINOR,
+};
+
+#define NILFS_CPINFO_FNS(flag, name) \
+static inline int \
+nilfs_cpinfo_##name(const struct nilfs_cpinfo *cpinfo) \
+{ \
+ return !!(cpinfo->ci_flags & (1UL << NILFS_CPINFO_##flag)); \
+}
+
+NILFS_CPINFO_FNS(SNAPSHOT, snapshot)
+NILFS_CPINFO_FNS(INVALID, invalid)
+NILFS_CPINFO_FNS(MINOR, minor)
+
+/**
+ * nilfs_suinfo - segment usage information
+ * @sui_lastmod: timestamp of last modification
+ * @sui_nblocks: number of written blocks in segment
+ * @sui_flags: segment usage flags
+ */
+struct nilfs_suinfo {
+ __u64 sui_lastmod;
+ __u32 sui_nblocks;
+ __u32 sui_flags;
+};
+
+/* segment usage flags */
+enum {
+ NILFS_SUINFO_ACTIVE,
+ NILFS_SUINFO_DIRTY,
+ NILFS_SUINFO_ERROR,
+};
+
+#define NILFS_SUINFO_FNS(flag, name) \
+static inline int \
+nilfs_suinfo_##name(const struct nilfs_suinfo *si) \
+{ \
+ return si->sui_flags & (1UL << NILFS_SUINFO_##flag); \
+}
+
+NILFS_SUINFO_FNS(ACTIVE, active)
+NILFS_SUINFO_FNS(DIRTY, dirty)
+NILFS_SUINFO_FNS(ERROR, error)
+
+static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si)
+{
+ return !si->sui_flags;
+}
+
+/**
+ * nilfs_suinfo_update - segment usage information update
+ * @sup_segnum: segment number
+ * @sup_flags: flags for which fields are active in sup_sui
+ * @sup_reserved: reserved necessary for alignment
+ * @sup_sui: segment usage information
+ */
+struct nilfs_suinfo_update {
+ __u64 sup_segnum;
+ __u32 sup_flags;
+ __u32 sup_reserved;
+ struct nilfs_suinfo sup_sui;
+};
+
+enum {
+ NILFS_SUINFO_UPDATE_LASTMOD,
+ NILFS_SUINFO_UPDATE_NBLOCKS,
+ NILFS_SUINFO_UPDATE_FLAGS,
+ __NR_NILFS_SUINFO_UPDATE_FIELDS,
+};
+
+#define NILFS_SUINFO_UPDATE_FNS(flag, name) \
+static inline void \
+nilfs_suinfo_update_set_##name(struct nilfs_suinfo_update *sup) \
+{ \
+ sup->sup_flags |= 1UL << NILFS_SUINFO_UPDATE_##flag; \
+} \
+static inline void \
+nilfs_suinfo_update_clear_##name(struct nilfs_suinfo_update *sup) \
+{ \
+ sup->sup_flags &= ~(1UL << NILFS_SUINFO_UPDATE_##flag); \
+} \
+static inline int \
+nilfs_suinfo_update_##name(const struct nilfs_suinfo_update *sup) \
+{ \
+ return !!(sup->sup_flags & (1UL << NILFS_SUINFO_UPDATE_##flag));\
+}
+
+NILFS_SUINFO_UPDATE_FNS(LASTMOD, lastmod)
+NILFS_SUINFO_UPDATE_FNS(NBLOCKS, nblocks)
+NILFS_SUINFO_UPDATE_FNS(FLAGS, flags)
+
+enum {
+ NILFS_CHECKPOINT,
+ NILFS_SNAPSHOT,
+};
+
+/**
+ * struct nilfs_cpmode - change checkpoint mode structure
+ * @cm_cno: checkpoint number
+ * @cm_mode: mode of checkpoint
+ * @cm_pad: padding
+ */
+struct nilfs_cpmode {
+ __u64 cm_cno;
+ __u32 cm_mode;
+ __u32 cm_pad;
+};
+
+/**
+ * struct nilfs_argv - argument vector
+ * @v_base: pointer on data array from userspace
+ * @v_nmembs: number of members in data array
+ * @v_size: size of data array in bytes
+ * @v_flags: flags
+ * @v_index: start number of target data items
+ */
+struct nilfs_argv {
+ __u64 v_base;
+ __u32 v_nmembs; /* number of members */
+ __u16 v_size; /* size of members */
+ __u16 v_flags;
+ __u64 v_index;
+};
+
+/**
+ * struct nilfs_period - period of checkpoint numbers
+ * @p_start: start checkpoint number (inclusive)
+ * @p_end: end checkpoint number (exclusive)
+ */
+struct nilfs_period {
+ __u64 p_start;
+ __u64 p_end;
+};
+
+/**
+ * struct nilfs_cpstat - checkpoint statistics
+ * @cs_cno: checkpoint number
+ * @cs_ncps: number of checkpoints
+ * @cs_nsss: number of snapshots
+ */
+struct nilfs_cpstat {
+ __u64 cs_cno;
+ __u64 cs_ncps;
+ __u64 cs_nsss;
+};
+
+/**
+ * struct nilfs_sustat - segment usage statistics
+ * @ss_nsegs: number of segments
+ * @ss_ncleansegs: number of clean segments
+ * @ss_ndirtysegs: number of dirty segments
+ * @ss_ctime: creation time of the last segment
+ * @ss_nongc_ctime: creation time of the last segment not for GC
+ * @ss_prot_seq: least sequence number of segments which must not be reclaimed
+ */
+struct nilfs_sustat {
+ __u64 ss_nsegs;
+ __u64 ss_ncleansegs;
+ __u64 ss_ndirtysegs;
+ __u64 ss_ctime;
+ __u64 ss_nongc_ctime;
+ __u64 ss_prot_seq;
+};
+
+/**
+ * struct nilfs_vinfo - virtual block number information
+ * @vi_vblocknr: virtual block number
+ * @vi_start: start checkpoint number (inclusive)
+ * @vi_end: end checkpoint number (exclusive)
+ * @vi_blocknr: disk block number
+ */
+struct nilfs_vinfo {
+ __u64 vi_vblocknr;
+ __u64 vi_start;
+ __u64 vi_end;
+ __u64 vi_blocknr;
+};
+
+/**
+ * struct nilfs_vdesc - descriptor of virtual block number
+ * @vd_ino: inode number
+ * @vd_cno: checkpoint number
+ * @vd_vblocknr: virtual block number
+ * @vd_period: period of checkpoint numbers
+ * @vd_blocknr: disk block number
+ * @vd_offset: logical block offset inside a file
+ * @vd_flags: flags (data or node block)
+ * @vd_pad: padding
+ */
+struct nilfs_vdesc {
+ __u64 vd_ino;
+ __u64 vd_cno;
+ __u64 vd_vblocknr;
+ struct nilfs_period vd_period;
+ __u64 vd_blocknr;
+ __u64 vd_offset;
+ __u32 vd_flags;
+ __u32 vd_pad;
+};
+
+/**
+ * struct nilfs_bdesc - descriptor of disk block number
+ * @bd_ino: inode number
+ * @bd_oblocknr: disk block address (for skipping dead blocks)
+ * @bd_blocknr: disk block address
+ * @bd_offset: logical block offset inside a file
+ * @bd_level: level in the b-tree organization
+ * @bd_pad: padding
+ */
+struct nilfs_bdesc {
+ __u64 bd_ino;
+ __u64 bd_oblocknr;
+ __u64 bd_blocknr;
+ __u64 bd_offset;
+ __u32 bd_level;
+ __u32 bd_pad;
+};
+
+#define NILFS_IOCTL_IDENT 'n'
+
+#define NILFS_IOCTL_CHANGE_CPMODE \
+ _IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode)
+#define NILFS_IOCTL_DELETE_CHECKPOINT \
+ _IOW(NILFS_IOCTL_IDENT, 0x81, __u64)
+#define NILFS_IOCTL_GET_CPINFO \
+ _IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv)
+#define NILFS_IOCTL_GET_CPSTAT \
+ _IOR(NILFS_IOCTL_IDENT, 0x83, struct nilfs_cpstat)
+#define NILFS_IOCTL_GET_SUINFO \
+ _IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv)
+#define NILFS_IOCTL_GET_SUSTAT \
+ _IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat)
+#define NILFS_IOCTL_GET_VINFO \
+ _IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv)
+#define NILFS_IOCTL_GET_BDESCS \
+ _IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv)
+#define NILFS_IOCTL_CLEAN_SEGMENTS \
+ _IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv[5])
+#define NILFS_IOCTL_SYNC \
+ _IOR(NILFS_IOCTL_IDENT, 0x8A, __u64)
+#define NILFS_IOCTL_RESIZE \
+ _IOW(NILFS_IOCTL_IDENT, 0x8B, __u64)
+#define NILFS_IOCTL_SET_ALLOC_RANGE \
+ _IOW(NILFS_IOCTL_IDENT, 0x8C, __u64[2])
+#define NILFS_IOCTL_SET_SUINFO \
+ _IOW(NILFS_IOCTL_IDENT, 0x8D, struct nilfs_argv)
+
+#endif /* _LINUX_NILFS2_API_H */
diff --git a/include/uapi/linux/nilfs2_ondisk.h b/include/uapi/linux/nilfs2_ondisk.h
new file mode 100644
index 0000000..2a8a3ad
--- /dev/null
+++ b/include/uapi/linux/nilfs2_ondisk.h
@@ -0,0 +1,650 @@
+/*
+ * nilfs2_ondisk.h - NILFS2 on-disk structures
+ *
+ * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ */
+/*
+ * linux/include/linux/ext2_fs.h
+ *
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ * from
+ *
+ * linux/include/linux/minix_fs.h
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+#ifndef _LINUX_NILFS2_ONDISK_H
+#define _LINUX_NILFS2_ONDISK_H
+
+#include <linux/types.h>
+#include <linux/magic.h>
+
+
+#define NILFS_INODE_BMAP_SIZE 7
+
+/**
+ * struct nilfs_inode - structure of an inode on disk
+ * @i_blocks: blocks count
+ * @i_size: size in bytes
+ * @i_ctime: creation time (seconds)
+ * @i_mtime: modification time (seconds)
+ * @i_ctime_nsec: creation time (nano seconds)
+ * @i_mtime_nsec: modification time (nano seconds)
+ * @i_uid: user id
+ * @i_gid: group id
+ * @i_mode: file mode
+ * @i_links_count: links count
+ * @i_flags: file flags
+ * @i_bmap: block mapping
+ * @i_xattr: extended attributes
+ * @i_generation: file generation (for NFS)
+ * @i_pad: padding
+ */
+struct nilfs_inode {
+ __le64 i_blocks;
+ __le64 i_size;
+ __le64 i_ctime;
+ __le64 i_mtime;
+ __le32 i_ctime_nsec;
+ __le32 i_mtime_nsec;
+ __le32 i_uid;
+ __le32 i_gid;
+ __le16 i_mode;
+ __le16 i_links_count;
+ __le32 i_flags;
+ __le64 i_bmap[NILFS_INODE_BMAP_SIZE];
+#define i_device_code i_bmap[0]
+ __le64 i_xattr;
+ __le32 i_generation;
+ __le32 i_pad;
+};
+
+#define NILFS_MIN_INODE_SIZE 128
+
+/**
+ * struct nilfs_super_root - structure of super root
+ * @sr_sum: check sum
+ * @sr_bytes: byte count of the structure
+ * @sr_flags: flags (reserved)
+ * @sr_nongc_ctime: write time of the last segment not for cleaner operation
+ * @sr_dat: DAT file inode
+ * @sr_cpfile: checkpoint file inode
+ * @sr_sufile: segment usage file inode
+ */
+struct nilfs_super_root {
+ __le32 sr_sum;
+ __le16 sr_bytes;
+ __le16 sr_flags;
+ __le64 sr_nongc_ctime;
+ struct nilfs_inode sr_dat;
+ struct nilfs_inode sr_cpfile;
+ struct nilfs_inode sr_sufile;
+};
+
+#define NILFS_SR_MDT_OFFSET(inode_size, i) \
+ ((unsigned long)&((struct nilfs_super_root *)0)->sr_dat + \
+ (inode_size) * (i))
+#define NILFS_SR_DAT_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 0)
+#define NILFS_SR_CPFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 1)
+#define NILFS_SR_SUFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 2)
+#define NILFS_SR_BYTES(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 3)
+
+/*
+ * Maximal mount counts
+ */
+#define NILFS_DFL_MAX_MNT_COUNT 50 /* 50 mounts */
+
+/*
+ * File system states (sbp->s_state, nilfs->ns_mount_state)
+ */
+#define NILFS_VALID_FS 0x0001 /* Unmounted cleanly */
+#define NILFS_ERROR_FS 0x0002 /* Errors detected */
+#define NILFS_RESIZE_FS 0x0004 /* Resize required */
+
+/*
+ * Mount flags (sbi->s_mount_opt)
+ */
+#define NILFS_MOUNT_ERROR_MODE 0x0070 /* Error mode mask */
+#define NILFS_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
+#define NILFS_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
+#define NILFS_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
+#define NILFS_MOUNT_BARRIER 0x1000 /* Use block barriers */
+#define NILFS_MOUNT_STRICT_ORDER 0x2000 /*
+ * Apply strict in-order
+ * semantics also for data
+ */
+#define NILFS_MOUNT_NORECOVERY 0x4000 /*
+ * Disable write access during
+ * mount-time recovery
+ */
+#define NILFS_MOUNT_DISCARD 0x8000 /* Issue DISCARD requests */
+
+
+/**
+ * struct nilfs_super_block - structure of super block on disk
+ */
+struct nilfs_super_block {
+/*00*/ __le32 s_rev_level; /* Revision level */
+ __le16 s_minor_rev_level; /* minor revision level */
+ __le16 s_magic; /* Magic signature */
+
+ __le16 s_bytes; /*
+ * Bytes count of CRC calculation
+ * for this structure. s_reserved
+ * is excluded.
+ */
+ __le16 s_flags; /* flags */
+ __le32 s_crc_seed; /* Seed value of CRC calculation */
+/*10*/ __le32 s_sum; /* Check sum of super block */
+
+ __le32 s_log_block_size; /*
+ * Block size represented as follows
+ * blocksize =
+ * 1 << (s_log_block_size + 10)
+ */
+ __le64 s_nsegments; /* Number of segments in filesystem */
+/*20*/ __le64 s_dev_size; /* block device size in bytes */
+ __le64 s_first_data_block; /* 1st seg disk block number */
+/*30*/ __le32 s_blocks_per_segment; /* number of blocks per full segment */
+ __le32 s_r_segments_percentage; /* Reserved segments percentage */
+
+ __le64 s_last_cno; /* Last checkpoint number */
+/*40*/ __le64 s_last_pseg; /* disk block addr pseg written last */
+ __le64 s_last_seq; /* seq. number of seg written last */
+/*50*/ __le64 s_free_blocks_count; /* Free blocks count */
+
+ __le64 s_ctime; /*
+ * Creation time (execution time of
+ * newfs)
+ */
+/*60*/ __le64 s_mtime; /* Mount time */
+ __le64 s_wtime; /* Write time */
+/*70*/ __le16 s_mnt_count; /* Mount count */
+ __le16 s_max_mnt_count; /* Maximal mount count */
+ __le16 s_state; /* File system state */
+ __le16 s_errors; /* Behaviour when detecting errors */
+ __le64 s_lastcheck; /* time of last check */
+
+/*80*/ __le32 s_checkinterval; /* max. time between checks */
+ __le32 s_creator_os; /* OS */
+ __le16 s_def_resuid; /* Default uid for reserved blocks */
+ __le16 s_def_resgid; /* Default gid for reserved blocks */
+ __le32 s_first_ino; /* First non-reserved inode */
+
+/*90*/ __le16 s_inode_size; /* Size of an inode */
+ __le16 s_dat_entry_size; /* Size of a dat entry */
+ __le16 s_checkpoint_size; /* Size of a checkpoint */
+ __le16 s_segment_usage_size; /* Size of a segment usage */
+
+/*98*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
+/*A8*/ char s_volume_name[80]; /* volume name */
+
+/*F8*/ __le32 s_c_interval; /* Commit interval of segment */
+ __le32 s_c_block_max; /*
+ * Threshold of data amount for
+ * the segment construction
+ */
+/*100*/ __le64 s_feature_compat; /* Compatible feature set */
+ __le64 s_feature_compat_ro; /* Read-only compatible feature set */
+ __le64 s_feature_incompat; /* Incompatible feature set */
+ __u32 s_reserved[186]; /* padding to the end of the block */
+};
+
+/*
+ * Codes for operating systems
+ */
+#define NILFS_OS_LINUX 0
+/* Codes from 1 to 4 are reserved to keep compatibility with ext2 creator-OS */
+
+/*
+ * Revision levels
+ */
+#define NILFS_CURRENT_REV 2 /* current major revision */
+#define NILFS_MINOR_REV 0 /* minor revision */
+#define NILFS_MIN_SUPP_REV 2 /* minimum supported revision */
+
+/*
+ * Feature set definitions
+ *
+ * If there is a bit set in the incompatible feature set that the kernel
+ * doesn't know about, it should refuse to mount the filesystem.
+ */
+#define NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT 0x00000001ULL
+
+#define NILFS_FEATURE_COMPAT_SUPP 0ULL
+#define NILFS_FEATURE_COMPAT_RO_SUPP NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT
+#define NILFS_FEATURE_INCOMPAT_SUPP 0ULL
+
+/*
+ * Bytes count of super_block for CRC-calculation
+ */
+#define NILFS_SB_BYTES \
+ ((long)&((struct nilfs_super_block *)0)->s_reserved)
+
+/*
+ * Special inode number
+ */
+#define NILFS_ROOT_INO 2 /* Root file inode */
+#define NILFS_DAT_INO 3 /* DAT file */
+#define NILFS_CPFILE_INO 4 /* checkpoint file */
+#define NILFS_SUFILE_INO 5 /* segment usage file */
+#define NILFS_IFILE_INO 6 /* ifile */
+#define NILFS_ATIME_INO 7 /* Atime file (reserved) */
+#define NILFS_XATTR_INO 8 /* Xattribute file (reserved) */
+#define NILFS_SKETCH_INO 10 /* Sketch file */
+#define NILFS_USER_INO 11 /* Fisrt user's file inode number */
+
+#define NILFS_SB_OFFSET_BYTES 1024 /* byte offset of nilfs superblock */
+
+#define NILFS_SEG_MIN_BLOCKS 16 /*
+ * Minimum number of blocks in
+ * a full segment
+ */
+#define NILFS_PSEG_MIN_BLOCKS 2 /*
+ * Minimum number of blocks in
+ * a partial segment
+ */
+#define NILFS_MIN_NRSVSEGS 8 /*
+ * Minimum number of reserved
+ * segments
+ */
+
+/*
+ * We call DAT, cpfile, and sufile root metadata files. Inodes of
+ * these files are written in super root block instead of ifile, and
+ * garbage collector doesn't keep any past versions of these files.
+ */
+#define NILFS_ROOT_METADATA_FILE(ino) \
+ ((ino) >= NILFS_DAT_INO && (ino) <= NILFS_SUFILE_INO)
+
+/*
+ * bytes offset of secondary super block
+ */
+#define NILFS_SB2_OFFSET_BYTES(devsize) ((((devsize) >> 12) - 1) << 12)
+
+/*
+ * Maximal count of links to a file
+ */
+#define NILFS_LINK_MAX 32000
+
+/*
+ * Structure of a directory entry
+ * (Same as ext2)
+ */
+
+#define NILFS_NAME_LEN 255
+
+/*
+ * Block size limitations
+ */
+#define NILFS_MIN_BLOCK_SIZE 1024
+#define NILFS_MAX_BLOCK_SIZE 65536
+
+/*
+ * The new version of the directory entry. Since V0 structures are
+ * stored in intel byte order, and the name_len field could never be
+ * bigger than 255 chars, it's safe to reclaim the extra byte for the
+ * file_type field.
+ */
+struct nilfs_dir_entry {
+ __le64 inode; /* Inode number */
+ __le16 rec_len; /* Directory entry length */
+ __u8 name_len; /* Name length */
+ __u8 file_type; /* Dir entry type (file, dir, etc) */
+ char name[NILFS_NAME_LEN]; /* File name */
+ char pad;
+};
+
+/*
+ * NILFS directory file types. Only the low 3 bits are used. The
+ * other bits are reserved for now.
+ */
+enum {
+ NILFS_FT_UNKNOWN,
+ NILFS_FT_REG_FILE,
+ NILFS_FT_DIR,
+ NILFS_FT_CHRDEV,
+ NILFS_FT_BLKDEV,
+ NILFS_FT_FIFO,
+ NILFS_FT_SOCK,
+ NILFS_FT_SYMLINK,
+ NILFS_FT_MAX
+};
+
+/*
+ * NILFS_DIR_PAD defines the directory entries boundaries
+ *
+ * NOTE: It must be a multiple of 8
+ */
+#define NILFS_DIR_PAD 8
+#define NILFS_DIR_ROUND (NILFS_DIR_PAD - 1)
+#define NILFS_DIR_REC_LEN(name_len) (((name_len) + 12 + NILFS_DIR_ROUND) & \
+ ~NILFS_DIR_ROUND)
+#define NILFS_MAX_REC_LEN ((1 << 16) - 1)
+
+/**
+ * struct nilfs_finfo - file information
+ * @fi_ino: inode number
+ * @fi_cno: checkpoint number
+ * @fi_nblocks: number of blocks (including intermediate blocks)
+ * @fi_ndatablk: number of file data blocks
+ */
+struct nilfs_finfo {
+ __le64 fi_ino;
+ __le64 fi_cno;
+ __le32 fi_nblocks;
+ __le32 fi_ndatablk;
+};
+
+/**
+ * struct nilfs_binfo_v - information on a data block (except DAT)
+ * @bi_vblocknr: virtual block number
+ * @bi_blkoff: block offset
+ */
+struct nilfs_binfo_v {
+ __le64 bi_vblocknr;
+ __le64 bi_blkoff;
+};
+
+/**
+ * struct nilfs_binfo_dat - information on a DAT node block
+ * @bi_blkoff: block offset
+ * @bi_level: level
+ * @bi_pad: padding
+ */
+struct nilfs_binfo_dat {
+ __le64 bi_blkoff;
+ __u8 bi_level;
+ __u8 bi_pad[7];
+};
+
+/**
+ * union nilfs_binfo: block information
+ * @bi_v: nilfs_binfo_v structure
+ * @bi_dat: nilfs_binfo_dat structure
+ */
+union nilfs_binfo {
+ struct nilfs_binfo_v bi_v;
+ struct nilfs_binfo_dat bi_dat;
+};
+
+/**
+ * struct nilfs_segment_summary - segment summary header
+ * @ss_datasum: checksum of data
+ * @ss_sumsum: checksum of segment summary
+ * @ss_magic: magic number
+ * @ss_bytes: size of this structure in bytes
+ * @ss_flags: flags
+ * @ss_seq: sequence number
+ * @ss_create: creation timestamp
+ * @ss_next: next segment
+ * @ss_nblocks: number of blocks
+ * @ss_nfinfo: number of finfo structures
+ * @ss_sumbytes: total size of segment summary in bytes
+ * @ss_pad: padding
+ * @ss_cno: checkpoint number
+ */
+struct nilfs_segment_summary {
+ __le32 ss_datasum;
+ __le32 ss_sumsum;
+ __le32 ss_magic;
+ __le16 ss_bytes;
+ __le16 ss_flags;
+ __le64 ss_seq;
+ __le64 ss_create;
+ __le64 ss_next;
+ __le32 ss_nblocks;
+ __le32 ss_nfinfo;
+ __le32 ss_sumbytes;
+ __le32 ss_pad;
+ __le64 ss_cno;
+ /* array of finfo structures */
+};
+
+#define NILFS_SEGSUM_MAGIC 0x1eaffa11 /* segment summary magic number */
+
+/*
+ * Segment summary flags
+ */
+#define NILFS_SS_LOGBGN 0x0001 /* begins a logical segment */
+#define NILFS_SS_LOGEND 0x0002 /* ends a logical segment */
+#define NILFS_SS_SR 0x0004 /* has super root */
+#define NILFS_SS_SYNDT 0x0008 /* includes data only updates */
+#define NILFS_SS_GC 0x0010 /* segment written for cleaner operation */
+
+/**
+ * struct nilfs_btree_node - header of B-tree node block
+ * @bn_flags: flags
+ * @bn_level: level
+ * @bn_nchildren: number of children
+ * @bn_pad: padding
+ */
+struct nilfs_btree_node {
+ __u8 bn_flags;
+ __u8 bn_level;
+ __le16 bn_nchildren;
+ __le32 bn_pad;
+};
+
+/* flags */
+#define NILFS_BTREE_NODE_ROOT 0x01
+
+/* level */
+#define NILFS_BTREE_LEVEL_DATA 0
+#define NILFS_BTREE_LEVEL_NODE_MIN (NILFS_BTREE_LEVEL_DATA + 1)
+#define NILFS_BTREE_LEVEL_MAX 14 /* Max level (exclusive) */
+
+/**
+ * struct nilfs_direct_node - header of built-in bmap array
+ * @dn_flags: flags
+ * @dn_pad: padding
+ */
+struct nilfs_direct_node {
+ __u8 dn_flags;
+ __u8 pad[7];
+};
+
+/**
+ * struct nilfs_palloc_group_desc - block group descriptor
+ * @pg_nfrees: number of free entries in block group
+ */
+struct nilfs_palloc_group_desc {
+ __le32 pg_nfrees;
+};
+
+/**
+ * struct nilfs_dat_entry - disk address translation entry
+ * @de_blocknr: block number
+ * @de_start: start checkpoint number
+ * @de_end: end checkpoint number
+ * @de_rsv: reserved for future use
+ */
+struct nilfs_dat_entry {
+ __le64 de_blocknr;
+ __le64 de_start;
+ __le64 de_end;
+ __le64 de_rsv;
+};
+
+#define NILFS_MIN_DAT_ENTRY_SIZE 32
+
+/**
+ * struct nilfs_snapshot_list - snapshot list
+ * @ssl_next: next checkpoint number on snapshot list
+ * @ssl_prev: previous checkpoint number on snapshot list
+ */
+struct nilfs_snapshot_list {
+ __le64 ssl_next;
+ __le64 ssl_prev;
+};
+
+/**
+ * struct nilfs_checkpoint - checkpoint structure
+ * @cp_flags: flags
+ * @cp_checkpoints_count: checkpoints count in a block
+ * @cp_snapshot_list: snapshot list
+ * @cp_cno: checkpoint number
+ * @cp_create: creation timestamp
+ * @cp_nblk_inc: number of blocks incremented by this checkpoint
+ * @cp_inodes_count: inodes count
+ * @cp_blocks_count: blocks count
+ * @cp_ifile_inode: inode of ifile
+ */
+struct nilfs_checkpoint {
+ __le32 cp_flags;
+ __le32 cp_checkpoints_count;
+ struct nilfs_snapshot_list cp_snapshot_list;
+ __le64 cp_cno;
+ __le64 cp_create;
+ __le64 cp_nblk_inc;
+ __le64 cp_inodes_count;
+ __le64 cp_blocks_count;
+
+ /*
+ * Do not change the byte offset of ifile inode.
+ * To keep the compatibility of the disk format,
+ * additional fields should be added behind cp_ifile_inode.
+ */
+ struct nilfs_inode cp_ifile_inode;
+};
+
+#define NILFS_MIN_CHECKPOINT_SIZE (64 + NILFS_MIN_INODE_SIZE)
+
+/* checkpoint flags */
+enum {
+ NILFS_CHECKPOINT_SNAPSHOT,
+ NILFS_CHECKPOINT_INVALID,
+ NILFS_CHECKPOINT_SKETCH,
+ NILFS_CHECKPOINT_MINOR,
+};
+
+#define NILFS_CHECKPOINT_FNS(flag, name) \
+static inline void \
+nilfs_checkpoint_set_##name(struct nilfs_checkpoint *cp) \
+{ \
+ cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) | \
+ (1UL << NILFS_CHECKPOINT_##flag)); \
+} \
+static inline void \
+nilfs_checkpoint_clear_##name(struct nilfs_checkpoint *cp) \
+{ \
+ cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) & \
+ ~(1UL << NILFS_CHECKPOINT_##flag)); \
+} \
+static inline int \
+nilfs_checkpoint_##name(const struct nilfs_checkpoint *cp) \
+{ \
+ return !!(le32_to_cpu(cp->cp_flags) & \
+ (1UL << NILFS_CHECKPOINT_##flag)); \
+}
+
+NILFS_CHECKPOINT_FNS(SNAPSHOT, snapshot)
+NILFS_CHECKPOINT_FNS(INVALID, invalid)
+NILFS_CHECKPOINT_FNS(MINOR, minor)
+
+/**
+ * struct nilfs_cpfile_header - checkpoint file header
+ * @ch_ncheckpoints: number of checkpoints
+ * @ch_nsnapshots: number of snapshots
+ * @ch_snapshot_list: snapshot list
+ */
+struct nilfs_cpfile_header {
+ __le64 ch_ncheckpoints;
+ __le64 ch_nsnapshots;
+ struct nilfs_snapshot_list ch_snapshot_list;
+};
+
+#define NILFS_CPFILE_FIRST_CHECKPOINT_OFFSET \
+ ((sizeof(struct nilfs_cpfile_header) + \
+ sizeof(struct nilfs_checkpoint) - 1) / \
+ sizeof(struct nilfs_checkpoint))
+
+/**
+ * struct nilfs_segment_usage - segment usage
+ * @su_lastmod: last modified timestamp
+ * @su_nblocks: number of blocks in segment
+ * @su_flags: flags
+ */
+struct nilfs_segment_usage {
+ __le64 su_lastmod;
+ __le32 su_nblocks;
+ __le32 su_flags;
+};
+
+#define NILFS_MIN_SEGMENT_USAGE_SIZE 16
+
+/* segment usage flag */
+enum {
+ NILFS_SEGMENT_USAGE_ACTIVE,
+ NILFS_SEGMENT_USAGE_DIRTY,
+ NILFS_SEGMENT_USAGE_ERROR,
+};
+
+#define NILFS_SEGMENT_USAGE_FNS(flag, name) \
+static inline void \
+nilfs_segment_usage_set_##name(struct nilfs_segment_usage *su) \
+{ \
+ su->su_flags = cpu_to_le32(le32_to_cpu(su->su_flags) | \
+ (1UL << NILFS_SEGMENT_USAGE_##flag));\
+} \
+static inline void \
+nilfs_segment_usage_clear_##name(struct nilfs_segment_usage *su) \
+{ \
+ su->su_flags = \
+ cpu_to_le32(le32_to_cpu(su->su_flags) & \
+ ~(1UL << NILFS_SEGMENT_USAGE_##flag)); \
+} \
+static inline int \
+nilfs_segment_usage_##name(const struct nilfs_segment_usage *su) \
+{ \
+ return !!(le32_to_cpu(su->su_flags) & \
+ (1UL << NILFS_SEGMENT_USAGE_##flag)); \
+}
+
+NILFS_SEGMENT_USAGE_FNS(ACTIVE, active)
+NILFS_SEGMENT_USAGE_FNS(DIRTY, dirty)
+NILFS_SEGMENT_USAGE_FNS(ERROR, error)
+
+static inline void
+nilfs_segment_usage_set_clean(struct nilfs_segment_usage *su)
+{
+ su->su_lastmod = cpu_to_le64(0);
+ su->su_nblocks = cpu_to_le32(0);
+ su->su_flags = cpu_to_le32(0);
+}
+
+static inline int
+nilfs_segment_usage_clean(const struct nilfs_segment_usage *su)
+{
+ return !le32_to_cpu(su->su_flags);
+}
+
+/**
+ * struct nilfs_sufile_header - segment usage file header
+ * @sh_ncleansegs: number of clean segments
+ * @sh_ndirtysegs: number of dirty segments
+ * @sh_last_alloc: last allocated segment number
+ */
+struct nilfs_sufile_header {
+ __le64 sh_ncleansegs;
+ __le64 sh_ndirtysegs;
+ __le64 sh_last_alloc;
+ /* ... */
+};
+
+#define NILFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET \
+ ((sizeof(struct nilfs_sufile_header) + \
+ sizeof(struct nilfs_segment_usage) - 1) / \
+ sizeof(struct nilfs_segment_usage))
+
+#endif /* _LINUX_NILFS2_ONDISK_H */
--
1.8.3.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH 3/3] nilfs2: move ioctl interface and disk layout to uapi separately
2016-06-13 13:45 ` [PATCH 3/3] nilfs2: move ioctl interface and disk layout to uapi separately Ryusuke Konishi
@ 2016-06-14 22:29 ` Andrew Morton
2016-06-15 13:27 ` Ryusuke Konishi
0 siblings, 1 reply; 7+ messages in thread
From: Andrew Morton @ 2016-06-14 22:29 UTC (permalink / raw)
To: Ryusuke Konishi; +Cc: linux-nilfs, LKML
On Mon, 13 Jun 2016 22:45:07 +0900 Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> wrote:
> The header file "include/linux/nilfs2_fs.h" is composed of parts for
> ioctl and disk format, and both are intended to be shared with user
> space programs.
>
> This moves them to the uapi directory "include/uapi/linux" splitting
> the file to "nilfs2_api.h" and "nilfs2_ondisk.h". The following minor
> changes are accompanied by this migration:
>
> - nilfs_direct_node struct in nilfs2/direct.h is converged to
> nilfs2_ondisk.h because it's an on-disk structure.
> - inline functions nilfs_rec_len_from_disk() and
> nilfs_rec_len_to_disk() are moved to nilfs2/dir.c.
>
> ...
>
> +static inline __le16 nilfs_rec_len_to_disk(unsigned int len)
> +{
> +#if (PAGE_SIZE >= 65536)
> + if (len == (1 << 16))
> + return cpu_to_le16(NILFS_MAX_REC_LEN);
> +
> + BUG_ON(len > (1 << 16));
Is there any way in which the mount of a corrupted filesystem could
trigger this BUG? If so, that would be bad.
> +#endif
> + return cpu_to_le16(len);
> +}
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 3/3] nilfs2: move ioctl interface and disk layout to uapi separately
2016-06-14 22:29 ` Andrew Morton
@ 2016-06-15 13:27 ` Ryusuke Konishi
0 siblings, 0 replies; 7+ messages in thread
From: Ryusuke Konishi @ 2016-06-15 13:27 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-nilfs, LKML
On Tue, 14 Jun 2016 15:29:52 -0700, Andrew Morton wrote:
> On Mon, 13 Jun 2016 22:45:07 +0900 Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> wrote:
>
>> The header file "include/linux/nilfs2_fs.h" is composed of parts for
>> ioctl and disk format, and both are intended to be shared with user
>> space programs.
>>
>> This moves them to the uapi directory "include/uapi/linux" splitting
>> the file to "nilfs2_api.h" and "nilfs2_ondisk.h". The following minor
>> changes are accompanied by this migration:
>>
>> - nilfs_direct_node struct in nilfs2/direct.h is converged to
>> nilfs2_ondisk.h because it's an on-disk structure.
>> - inline functions nilfs_rec_len_from_disk() and
>> nilfs_rec_len_to_disk() are moved to nilfs2/dir.c.
>>
>> ...
>>
>> +static inline __le16 nilfs_rec_len_to_disk(unsigned int len)
>> +{
>> +#if (PAGE_SIZE >= 65536)
>> + if (len == (1 << 16))
>> + return cpu_to_le16(NILFS_MAX_REC_LEN);
>> +
>> + BUG_ON(len > (1 << 16));
>
> Is there any way in which the mount of a corrupted filesystem could
> trigger this BUG? If so, that would be bad.
This BUG is never triggered in theory because the length is limited to
"chunk_size" by nilfs_check_page(), nilfs_make_empty(), etc, and the
chunk_size is limited to s_blocksize which is verified to be less than
or equal to NILFS_MAX_BLOCK_SIZE (= 65536) at mount time.
This time I didn't come up with a simple way to remove it - I hope to
clean it when refactoring the directory implementation.
Thanks,
Ryusuke Konishi
>> +#endif
>> + return cpu_to_le16(len);
>> +}
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 0/3] nilfs2 additional updates
@ 2014-02-23 16:58 Ryusuke Konishi
0 siblings, 0 replies; 7+ messages in thread
From: Ryusuke Konishi @ 2014-02-23 16:58 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-nilfs, LKML, linux-fsdevel, Ryusuke Konishi
Hi Andrew,
Please queue this patchset for the next merge window.
Andreas's two patches will add FITRIM ioctl support to nilfs. The
original cover letter can be seen at:
[1] http://marc.info/?l=linux-nilfs&m=139314496625648
"[PATCH v4 0/2] nilfs2: add support for FITRIM ioctl"
My patch adds missing range checks of metadata sizes read from disk,
and prevents potential memory access violations due to invalid sizes.
This is for the issue pointed out in the following comment.
[2] http://marc.info/?l=linux-nilfs&m=139153213412866
"Re: [PATCH 3/4] nilfs2: add nilfs_sufile_set_suinfo to update
segment usage"
Thanks in advance,
Ryusuke Konishi
--
Andreas Rohner (2):
nilfs2: add nilfs_sufile_trim_fs to trim clean segs
nilfs2: add FITRIM ioctl support for nilfs2
Ryusuke Konishi (1):
nilfs2: verify metadata sizes read from disk
fs/nilfs2/cpfile.c | 12 ++++
fs/nilfs2/dat.c | 12 ++++
fs/nilfs2/ioctl.c | 45 +++++++++++++
fs/nilfs2/sufile.c | 164 +++++++++++++++++++++++++++++++++++++++++++++
fs/nilfs2/sufile.h | 1 +
fs/nilfs2/the_nilfs.c | 10 +++
include/linux/nilfs2_fs.h | 8 +++
7 files changed, 252 insertions(+)
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2016-06-15 13:27 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-06-13 13:45 [PATCH 0/3] nilfs2 additional updates Ryusuke Konishi
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2016-06-13 13:45 ` [PATCH 2/3] nilfs2: use BIT() macro Ryusuke Konishi
2016-06-13 13:45 ` [PATCH 3/3] nilfs2: move ioctl interface and disk layout to uapi separately Ryusuke Konishi
2016-06-14 22:29 ` Andrew Morton
2016-06-15 13:27 ` Ryusuke Konishi
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