From: Dave Chinner <dchinner@xxxxxxxxxx>
Source kernel commit 93f958f9c41f0bfd10627a2279457df64004d957
Now that the struct xfs_icdinode is not directly related to the
on-disk format, we can cull things in it we really don't need to
store:
- magic number never changes
- padding is not necessary
- next_unlinked is never used
- inode number is redundant
- uuid is redundant
- lsn is accessed directly from dinode
- inode CRC is only accessed directly from dinode
Hence we can remove these from the struct xfs_icdinode and redirect
the code that uses them to the xfs_dinode appripriately. This
reduces the size of the struct icdinode from 152 bytes to 88 bytes,
and removes a fair chunk of unnecessary code, too.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Dave Chinner <david@xxxxxxxxxxxxx>
---
db/check.c | 4 ++--
libxfs/util.c | 11 +----------
libxfs/xfs_inode_buf.c | 39 +++++++++++++--------------------------
libxfs/xfs_inode_buf.h | 25 ++++++-------------------
repair/phase6.c | 18 ------------------
5 files changed, 22 insertions(+), 75 deletions(-)
diff --git a/db/check.c b/db/check.c
index 2203f41..95a68d4 100644
--- a/db/check.c
+++ b/db/check.c
@@ -2672,10 +2672,10 @@ process_inode(
blkmap = NULL;
}
v = (!sflag || (id && id->ilist) || CHECK_BLIST(bno));
- if (xino.i_d.di_magic != XFS_DINODE_MAGIC) {
+ if (dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC)) {
if (isfree || v)
dbprintf(_("bad magic number %#x for inode %lld\n"),
- xino.i_d.di_magic, ino);
+ be16_to_cpu(dip->di_magic), ino);
error++;
return;
}
diff --git a/libxfs/util.c b/libxfs/util.c
index 86fadc3..a893c3a 100644
--- a/libxfs/util.c
+++ b/libxfs/util.c
@@ -224,7 +224,6 @@ libxfs_ialloc(
ip->i_d.di_uid = cr->cr_uid;
ip->i_d.di_gid = cr->cr_gid;
xfs_set_projid(&ip->i_d, pip ? 0 : fsx->fsx_projid);
- memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG | XFS_ICHGTIME_MOD);
/*
@@ -261,11 +260,8 @@ libxfs_ialloc(
if (ip->i_d.di_version == 3) {
ASSERT(ip->i_d.di_ino == ino);
ASSERT(uuid_equal(&ip->i_d.di_uuid, &mp->m_sb.sb_meta_uuid));
- ip->i_d.di_crc = 0;
ip->i_d.di_changecount = 1;
- ip->i_d.di_lsn = 0;
ip->i_d.di_flags2 = 0;
- memset(&(ip->i_d.di_pad2[0]), 0, sizeof(ip->i_d.di_pad2));
ip->i_d.di_crtime.t_sec = (__int32_t)VFS_I(ip)->i_mtime.tv_sec;
ip->i_d.di_crtime.t_nsec = (__int32_t)VFS_I(ip)->i_mtime.tv_nsec;
}
@@ -376,7 +372,6 @@ libxfs_iprint(
dip = &ip->i_d;
printf("\nOn disk portion\n");
- printf(" di_magic %x\n", dip->di_magic);
printf(" di_mode %o\n", dip->di_mode);
printf(" di_version %x\n", (uint)dip->di_version);
switch (ip->i_d.di_format) {
@@ -449,16 +444,12 @@ libxfs_iflush_int(xfs_inode_t *ip, xfs_buf_t *bp)
* because if the inode is dirty at all the core must
* be.
*/
- xfs_inode_to_disk(ip, dip);
+ xfs_inode_to_disk(ip, dip, iip->ili_item.li_lsn);
xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK);
if (XFS_IFORK_Q(ip))
xfs_iflush_fork(ip, dip, iip, XFS_ATTR_FORK);
- /* update the lsn in the on disk inode if required */
- if (ip->i_d.di_version == 3)
- dip->di_lsn = cpu_to_be64(iip->ili_item.li_lsn);
-
/* generate the checksum. */
xfs_dinode_calc_crc(mp, dip);
diff --git a/libxfs/xfs_inode_buf.c b/libxfs/xfs_inode_buf.c
index f546b41..5a7a118 100644
--- a/libxfs/xfs_inode_buf.c
+++ b/libxfs/xfs_inode_buf.c
@@ -211,7 +211,6 @@ xfs_inode_from_disk(
struct xfs_icdinode *to = &ip->i_d;
struct inode *inode = VFS_I(ip);
- to->di_magic = be16_to_cpu(from->di_magic);
to->di_mode = be16_to_cpu(from->di_mode);
to->di_version = from ->di_version;
to->di_format = from->di_format;
@@ -221,7 +220,6 @@ xfs_inode_from_disk(
to->di_nlink = be32_to_cpu(from->di_nlink);
to->di_projid_lo = be16_to_cpu(from->di_projid_lo);
to->di_projid_hi = be16_to_cpu(from->di_projid_hi);
- memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad));
to->di_flushiter = be16_to_cpu(from->di_flushiter);
/*
@@ -254,24 +252,22 @@ xfs_inode_from_disk(
to->di_crtime.t_sec = be32_to_cpu(from->di_crtime.t_sec);
to->di_crtime.t_nsec = be32_to_cpu(from->di_crtime.t_nsec);
to->di_flags2 = be64_to_cpu(from->di_flags2);
- to->di_ino = be64_to_cpu(from->di_ino);
- to->di_lsn = be64_to_cpu(from->di_lsn);
- memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2));
- uuid_copy(&to->di_uuid, &from->di_uuid);
}
}
void
xfs_inode_to_disk(
struct xfs_inode *ip,
- struct xfs_dinode *to)
+ struct xfs_dinode *to,
+ xfs_lsn_t lsn)
{
struct xfs_icdinode *from = &ip->i_d;
struct inode *inode = VFS_I(ip);
- to->di_magic = cpu_to_be16(from->di_magic);
+ to->di_magic = cpu_to_be16(XFS_DINODE_MAGIC);
+
to->di_mode = cpu_to_be16(from->di_mode);
- to->di_version = from ->di_version;
+ to->di_version = from->di_version;
to->di_format = from->di_format;
to->di_onlink = cpu_to_be16(from->di_onlink);
to->di_uid = cpu_to_be32(from->di_uid);
@@ -279,8 +275,8 @@ xfs_inode_to_disk(
to->di_nlink = cpu_to_be32(from->di_nlink);
to->di_projid_lo = cpu_to_be16(from->di_projid_lo);
to->di_projid_hi = cpu_to_be16(from->di_projid_hi);
- memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad));
+ memset(to->di_pad, 0, sizeof(to->di_pad));
to->di_atime.t_sec = cpu_to_be32(inode->i_atime.tv_sec);
to->di_atime.t_nsec = cpu_to_be32(inode->i_atime.tv_nsec);
to->di_mtime.t_sec = cpu_to_be32(inode->i_mtime.tv_sec);
@@ -305,10 +301,11 @@ xfs_inode_to_disk(
to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec);
to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec);
to->di_flags2 = cpu_to_be64(from->di_flags2);
- to->di_ino = cpu_to_be64(from->di_ino);
- to->di_lsn = cpu_to_be64(from->di_lsn);
- memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2));
- uuid_copy(&to->di_uuid, &from->di_uuid);
+
+ to->di_ino = cpu_to_be64(ip->i_ino);
+ to->di_lsn = cpu_to_be64(lsn);
+ memset(to->di_pad2, 0, sizeof(to->di_pad2));
+ uuid_copy(&to->di_uuid, &ip->i_mount->m_sb.sb_meta_uuid);
to->di_flushiter = 0;
} else {
to->di_flushiter = cpu_to_be16(from->di_flushiter);
@@ -443,13 +440,10 @@ xfs_iread(
!(mp->m_flags & XFS_MOUNT_IKEEP)) {
/* initialise the on-disk inode core */
memset(&ip->i_d, 0, sizeof(ip->i_d));
- ip->i_d.di_magic = XFS_DINODE_MAGIC;
ip->i_d.di_gen = prandom_u32();
- if (xfs_sb_version_hascrc(&mp->m_sb)) {
+ if (xfs_sb_version_hascrc(&mp->m_sb))
ip->i_d.di_version = 3;
- ip->i_d.di_ino = ip->i_ino;
- uuid_copy(&ip->i_d.di_uuid, &mp->m_sb.sb_meta_uuid);
- } else
+ else
ip->i_d.di_version = 2;
return 0;
}
@@ -493,16 +487,10 @@ xfs_iread(
* Partial initialisation of the in-core inode. Just the bits
* that xfs_ialloc won't overwrite or relies on being correct.
*/
- ip->i_d.di_magic = be16_to_cpu(dip->di_magic);
ip->i_d.di_version = dip->di_version;
ip->i_d.di_gen = be32_to_cpu(dip->di_gen);
ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter);
- if (dip->di_version == 3) {
- ip->i_d.di_ino = be64_to_cpu(dip->di_ino);
- uuid_copy(&ip->i_d.di_uuid, &dip->di_uuid);
- }
-
/*
* Make sure to pull in the mode here as well in
* case the inode is released without being used.
@@ -523,7 +511,6 @@ xfs_iread(
*/
if (ip->i_d.di_version == 1) {
ip->i_d.di_version = 2;
- memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
ip->i_d.di_nlink = ip->i_d.di_onlink;
ip->i_d.di_onlink = 0;
xfs_set_projid(&ip->i_d, 0);
diff --git a/libxfs/xfs_inode_buf.h b/libxfs/xfs_inode_buf.h
index 6242974..974d060 100644
--- a/libxfs/xfs_inode_buf.h
+++ b/libxfs/xfs_inode_buf.h
@@ -22,24 +22,22 @@ struct xfs_inode;
struct xfs_dinode;
/*
- * In memory representation of the XFS inode. This is held in the in-core
- * struct xfs_inode to represent the on disk values, but no longer needs to be
- * identical to the on-disk structure as it is always translated to on-disk
+ * In memory representation of the XFS inode. This is held in the in-core struct
+ * xfs_inode and represents the current on disk values but the structure is not
+ * in on-disk format. That is, this structure is always translated to on-disk
* format specific structures at the appropriate time.
*/
struct xfs_icdinode {
- __uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */
__uint16_t di_mode; /* mode and type of file */
__int8_t di_version; /* inode version */
__int8_t di_format; /* format of di_c data */
__uint16_t di_onlink; /* old number of links to file */
+ __uint16_t di_flushiter; /* incremented on flush */
__uint32_t di_uid; /* owner's user id */
__uint32_t di_gid; /* owner's group id */
__uint32_t di_nlink; /* number of links to file */
__uint16_t di_projid_lo; /* lower part of owner's project id */
__uint16_t di_projid_hi; /* higher part of owner's project id */
- __uint8_t di_pad[6]; /* unused, zeroed space */
- __uint16_t di_flushiter; /* incremented on flush */
xfs_fsize_t di_size; /* number of bytes in file */
xfs_rfsblock_t di_nblocks; /* # of direct & btree blocks used */
xfs_extlen_t di_extsize; /* basic/minimum extent size for file */
@@ -52,22 +50,10 @@ struct xfs_icdinode {
__uint16_t di_flags; /* random flags, XFS_DIFLAG_... */
__uint32_t di_gen; /* generation number */
- /* di_next_unlinked is the only non-core field in the old dinode */
- xfs_agino_t di_next_unlinked;/* agi unlinked list ptr */
-
- /* start of the extended dinode, writable fields */
- __uint32_t di_crc; /* CRC of the inode */
__uint64_t di_changecount; /* number of attribute changes */
- xfs_lsn_t di_lsn; /* flush sequence */
__uint64_t di_flags2; /* more random flags */
- __uint8_t di_pad2[16]; /* more padding for future expansion */
- /* fields only written to during inode creation */
xfs_ictimestamp_t di_crtime; /* time created */
- xfs_ino_t di_ino; /* inode number */
- uuid_t di_uuid; /* UUID of the filesystem */
-
- /* structure must be padded to 64 bit alignment */
};
/*
@@ -86,7 +72,8 @@ int xfs_imap_to_bp(struct xfs_mount *, struct xfs_trans *,
int xfs_iread(struct xfs_mount *, struct xfs_trans *,
struct xfs_inode *, uint);
void xfs_dinode_calc_crc(struct xfs_mount *, struct xfs_dinode *);
-void xfs_inode_to_disk(struct xfs_inode *ip, struct xfs_dinode *to);
+void xfs_inode_to_disk(struct xfs_inode *ip, struct xfs_dinode *to,
+ xfs_lsn_t lsn);
void xfs_inode_from_disk(struct xfs_inode *ip, struct xfs_dinode *from);
void xfs_log_dinode_to_disk(struct xfs_log_dinode *from,
struct xfs_dinode *to);
diff --git a/repair/phase6.c b/repair/phase6.c
index 3aa109d..00142e2 100644
--- a/repair/phase6.c
+++ b/repair/phase6.c
@@ -510,7 +510,6 @@ mk_rbmino(xfs_mount_t *mp)
vers = xfs_sb_version_hascrc(&mp->m_sb) ? 3 : 2;
memset(&ip->i_d, 0, sizeof(ip->i_d));
- ip->i_d.di_magic = XFS_DINODE_MAGIC;
ip->i_d.di_mode = S_IFREG;
ip->i_d.di_version = vers;
ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS;
@@ -520,13 +519,8 @@ mk_rbmino(xfs_mount_t *mp)
times = XFS_ICHGTIME_CHG | XFS_ICHGTIME_MOD;
if (ip->i_d.di_version == 3) {
- ip->i_d.di_crc = 0;
ip->i_d.di_changecount = 1;
- ip->i_d.di_lsn = 0;
ip->i_d.di_flags2 = 0;
- ip->i_d.di_ino = mp->m_sb.sb_rbmino;
- memset(&(ip->i_d.di_pad2[0]), 0, sizeof(ip->i_d.di_pad2));
- platform_uuid_copy(&ip->i_d.di_uuid, &mp->m_sb.sb_meta_uuid);
times |= XFS_ICHGTIME_CREATE;
}
libxfs_trans_ichgtime(tp, ip, times);
@@ -769,7 +763,6 @@ mk_rsumino(xfs_mount_t *mp)
vers = xfs_sb_version_hascrc(&mp->m_sb) ? 3 : 1;
memset(&ip->i_d, 0, sizeof(ip->i_d));
- ip->i_d.di_magic = XFS_DINODE_MAGIC;
ip->i_d.di_mode = S_IFREG;
ip->i_d.di_version = vers;
ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS;
@@ -779,13 +772,8 @@ mk_rsumino(xfs_mount_t *mp)
times = XFS_ICHGTIME_CHG | XFS_ICHGTIME_MOD;
if (ip->i_d.di_version == 3) {
- ip->i_d.di_crc = 0;
ip->i_d.di_changecount = 1;
- ip->i_d.di_lsn = 0;
ip->i_d.di_flags2 = 0;
- ip->i_d.di_ino = mp->m_sb.sb_rsumino;
- memset(&(ip->i_d.di_pad2[0]), 0, sizeof(ip->i_d.di_pad2));
- platform_uuid_copy(&ip->i_d.di_uuid, &mp->m_sb.sb_meta_uuid);
times |= XFS_ICHGTIME_CREATE;
}
libxfs_trans_ichgtime(tp, ip, times);
@@ -884,7 +872,6 @@ mk_root_dir(xfs_mount_t *mp)
vers = xfs_sb_version_hascrc(&mp->m_sb) ? 3 : 2;
memset(&ip->i_d, 0, sizeof(ip->i_d));
- ip->i_d.di_magic = XFS_DINODE_MAGIC;
ip->i_d.di_mode = (__uint16_t) mode|S_IFDIR;
ip->i_d.di_version = vers;
ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS;
@@ -894,13 +881,8 @@ mk_root_dir(xfs_mount_t *mp)
times = XFS_ICHGTIME_CHG | XFS_ICHGTIME_MOD;
if (ip->i_d.di_version == 3) {
- ip->i_d.di_crc = 0;
ip->i_d.di_changecount = 1;
- ip->i_d.di_lsn = 0;
ip->i_d.di_flags2 = 0;
- ip->i_d.di_ino = mp->m_sb.sb_rootino;
- memset(&(ip->i_d.di_pad2[0]), 0, sizeof(ip->i_d.di_pad2));
- platform_uuid_copy(&ip->i_d.di_uuid, &mp->m_sb.sb_meta_uuid);
times |= XFS_ICHGTIME_CREATE;
}
libxfs_trans_ichgtime(tp, ip, times);
--
2.7.0
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