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xfs: reduce code duplication handling inode32/64 options 

Add xfs_set_inode32() to be used to enable inode32 allocation mode. this
will reduce the amount of duplicated code needed to mount/remount a
filesystem with inode32 option.  This patch also changes
xfs_set_inode64() to return the maximum AG number that inodes can be
allocated instead of set mp->m_maxagi by itself, so that the behaviour
is the same as xfs_set_inode32().  This simplifies code that calls these
functions and needs to know the maximum AG that inodes can be allocated
in.

Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Carlos Maiolino 2012-09-20 10:32:38 -03:00 committed by Ben Myers
parent 08bf540412
commit 2d2194f61f
3 changed files with 72 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
fs/xfs/xfs_mount.c
View File

@ -440,7 +440,7 @@ xfs_initialize_perag(
xfs_agnumber_t agcount,
xfs_agnumber_t *maxagi)
{
xfs_agnumber_t index, max_metadata;
xfs_agnumber_t index;
xfs_agnumber_t first_initialised = 0;
xfs_perag_t *pag;
xfs_agino_t agino;
@ -500,43 +500,10 @@ xfs_initialize_perag(
else
mp->m_flags &= ~XFS_MOUNT_32BITINODES;
if (mp->m_flags & XFS_MOUNT_32BITINODES) {
/*
* Calculate how much should be reserved for inodes to meet
* the max inode percentage.
*/
if (mp->m_maxicount) {
__uint64_t icount;
icount = sbp->sb_dblocks * sbp->sb_imax_pct;
do_div(icount, 100);
icount += sbp->sb_agblocks - 1;
do_div(icount, sbp->sb_agblocks);
max_metadata = icount;
} else {
max_metadata = agcount;
}
for (index = 0; index < agcount; index++) {
ino = XFS_AGINO_TO_INO(mp, index, agino);
if (ino > XFS_MAXINUMBER_32) {
index++;
break;
}
pag = xfs_perag_get(mp, index);
pag->pagi_inodeok = 1;
if (index < max_metadata)
pag->pagf_metadata = 1;
xfs_perag_put(pag);
}
} else {
for (index = 0; index < agcount; index++) {
pag = xfs_perag_get(mp, index);
pag->pagi_inodeok = 1;
xfs_perag_put(pag);
}
}
if (mp->m_flags & XFS_MOUNT_32BITINODES)
index = xfs_set_inode32(mp);
else
index = xfs_set_inode64(mp);
if (maxagi)
*maxagi = index;

89
fs/xfs/xfs_super.c
View File

@ -599,6 +599,71 @@ xfs_max_file_offset(
return (((__uint64_t)pagefactor) << bitshift) - 1;
}
xfs_agnumber_t
xfs_set_inode32(struct xfs_mount *mp)
{
xfs_agnumber_t index = 0;
xfs_sb_t *sbp = &mp->m_sb;
xfs_agnumber_t max_metadata;
xfs_agino_t agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks -1, 0);
xfs_ino_t ino = XFS_AGINO_TO_INO(mp, sbp->sb_agcount -1, agino);
xfs_perag_t *pag;
/* Calculate how much should be reserved for inodes to meet
* the max inode percentage.
*/
if (mp->m_maxicount) {
__uint64_t icount;
icount = sbp->sb_dblocks * sbp->sb_imax_pct;
do_div(icount, 100);
icount += sbp->sb_agblocks - 1;
do_div(icount, sbp->sb_agblocks);
max_metadata = icount;
} else {
max_metadata = sbp->sb_agcount;
}
for (index = 0; index < sbp->sb_agcount; index++) {
ino = XFS_AGINO_TO_INO(mp, index, agino);
if (ino > XFS_MAXINUMBER_32) {
index++;
break;
}
pag = xfs_perag_get(mp, index);
pag->pagi_inodeok = 1;
if (index < max_metadata)
pag->pagf_metadata = 1;
xfs_perag_put(pag);
}
return index;
}
xfs_agnumber_t
xfs_set_inode64(struct xfs_mount *mp)
{
xfs_agnumber_t index = 0;
for (index = 0; index < mp->m_sb.sb_agcount; index++) {
struct xfs_perag *pag;
pag = xfs_perag_get(mp, index);
pag->pagi_inodeok = 1;
pag->pagf_metadata = 0;
xfs_perag_put(pag);
}
/* There is no need for lock protection on m_flags,
* the rw_semaphore of the VFS superblock is locked
* during mount/umount/remount operations, so this is
* enough to avoid concurency on the m_flags field
*/
mp->m_flags &= ~(XFS_MOUNT_32BITINODES |
XFS_MOUNT_SMALL_INUMS);
return index;
}
STATIC int
xfs_blkdev_get(
xfs_mount_t *mp,
@ -1039,30 +1104,6 @@ xfs_restore_resvblks(struct xfs_mount *mp)
xfs_reserve_blocks(mp, &resblks, NULL);
}
STATIC void
xfs_set_inode64(struct xfs_mount *mp)
{
int i = 0;
for (i = 0; i < mp->m_sb.sb_agcount; i++) {
struct xfs_perag *pag;
pag = xfs_perag_get(mp, i);
pag->pagi_inodeok = 1;
pag->pagf_metadata = 0;
xfs_perag_put(pag);
}
/* There is no need for lock protection on m_flags,
* the rw_semaphore of the VFS superblock is locked
* during mount/umount/remount operations, so this is
* enough to avoid concurency on the m_flags field
*/
mp->m_flags &= ~(XFS_MOUNT_32BITINODES |
XFS_MOUNT_SMALL_INUMS);
mp->m_maxagi = i;
}
STATIC int
xfs_fs_remount(
struct super_block *sb,

2
fs/xfs/xfs_super.h
View File

@ -75,6 +75,8 @@ struct block_device;
extern __uint64_t xfs_max_file_offset(unsigned int);
extern void xfs_blkdev_issue_flush(struct xfs_buftarg *);
extern xfs_agnumber_t xfs_set_inode32(struct xfs_mount *);
extern xfs_agnumber_t xfs_set_inode64(struct xfs_mount *);
extern const struct export_operations xfs_export_operations;
extern const struct xattr_handler *xfs_xattr_handlers[];