#include "xfs_inode.h"
#include "xfs_errortag.h"
#include "xfs_alloc.h"
+#include "xfs_rtgroup.h"
+#include "xfs_rtrmap_btree.h"
+#include "xfs_rtrefcount_btree.h"
static const struct {
enum xfs_metafile_type mtype;
}
/*
- * Is the amount of space that could be allocated towards a given metadata
- * file at or beneath a certain threshold?
+ * Is the metafile reservations at or beneath a certain threshold?
*/
static inline bool
xfs_metafile_resv_can_cover(
- struct xfs_inode *ip,
+ struct xfs_mount *mp,
int64_t rhs)
{
/*
* global free block count. Take care of the first case to avoid
* touching the per-cpu counter.
*/
- if (ip->i_delayed_blks >= rhs)
+ if (mp->m_metafile_resv_avail >= rhs)
return true;
/*
* There aren't enough blocks left in the inode's reservation, but it
* isn't critical unless there also isn't enough free space.
*/
- return xfs_compare_freecounter(ip->i_mount, XC_FREE_BLOCKS,
- rhs - ip->i_delayed_blks, 2048) >= 0;
+ return xfs_compare_freecounter(mp, XC_FREE_BLOCKS,
+ rhs - mp->m_metafile_resv_avail, 2048) >= 0;
}
/*
- * Is this metadata file critically low on blocks? For now we'll define that
- * as the number of blocks we can get our hands on being less than 10% of what
- * we reserved or less than some arbitrary number (maximum btree height).
+ * Is the metafile reservation critically low on blocks? For now we'll define
+ * that as the number of blocks we can get our hands on being less than 10% of
+ * what we reserved or less than some arbitrary number (maximum btree height).
*/
bool
xfs_metafile_resv_critical(
- struct xfs_inode *ip)
+ struct xfs_mount *mp)
{
- uint64_t asked_low_water;
+ ASSERT(xfs_has_metadir(mp));
- if (!ip)
- return false;
-
- ASSERT(xfs_is_metadir_inode(ip));
- trace_xfs_metafile_resv_critical(ip, 0);
+ trace_xfs_metafile_resv_critical(mp, 0);
- if (!xfs_metafile_resv_can_cover(ip, ip->i_mount->m_rtbtree_maxlevels))
+ if (!xfs_metafile_resv_can_cover(mp, mp->m_rtbtree_maxlevels))
return true;
- asked_low_water = div_u64(ip->i_meta_resv_asked, 10);
- if (!xfs_metafile_resv_can_cover(ip, asked_low_water))
+ if (!xfs_metafile_resv_can_cover(mp,
+ div_u64(mp->m_metafile_resv_target, 10)))
return true;
- return XFS_TEST_ERROR(false, ip->i_mount,
- XFS_ERRTAG_METAFILE_RESV_CRITICAL);
+ return XFS_TEST_ERROR(false, mp, XFS_ERRTAG_METAFILE_RESV_CRITICAL);
}
/* Allocate a block from the metadata file's reservation. */
struct xfs_inode *ip,
struct xfs_alloc_arg *args)
{
+ struct xfs_mount *mp = ip->i_mount;
int64_t len = args->len;
ASSERT(xfs_is_metadir_inode(ip));
ASSERT(args->resv == XFS_AG_RESV_METAFILE);
- trace_xfs_metafile_resv_alloc_space(ip, args->len);
+ trace_xfs_metafile_resv_alloc_space(mp, args->len);
/*
* Allocate the blocks from the metadata inode's block reservation
* and update the ondisk sb counter.
*/
- if (ip->i_delayed_blks > 0) {
+ mutex_lock(&mp->m_metafile_resv_lock);
+ if (mp->m_metafile_resv_avail > 0) {
int64_t from_resv;
- from_resv = min_t(int64_t, len, ip->i_delayed_blks);
- ip->i_delayed_blks -= from_resv;
+ from_resv = min_t(int64_t, len, mp->m_metafile_resv_avail);
+ mp->m_metafile_resv_avail -= from_resv;
xfs_mod_delalloc(ip, 0, -from_resv);
xfs_trans_mod_sb(args->tp, XFS_TRANS_SB_RES_FDBLOCKS,
-from_resv);
xfs_trans_mod_sb(args->tp, field, -len);
}
+ mp->m_metafile_resv_used += args->len;
+ mutex_unlock(&mp->m_metafile_resv_lock);
+
ip->i_nblocks += args->len;
xfs_trans_log_inode(args->tp, ip, XFS_ILOG_CORE);
}
struct xfs_trans *tp,
xfs_filblks_t len)
{
+ struct xfs_mount *mp = ip->i_mount;
int64_t to_resv;
ASSERT(xfs_is_metadir_inode(ip));
- trace_xfs_metafile_resv_free_space(ip, len);
+
+ trace_xfs_metafile_resv_free_space(mp, len);
ip->i_nblocks -= len;
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+ mutex_lock(&mp->m_metafile_resv_lock);
+ mp->m_metafile_resv_used -= len;
+
/*
* Add the freed blocks back into the inode's delalloc reservation
* until it reaches the maximum size. Update the ondisk fdblocks only.
*/
- to_resv = ip->i_meta_resv_asked - (ip->i_nblocks + ip->i_delayed_blks);
+ to_resv = mp->m_metafile_resv_target -
+ (mp->m_metafile_resv_used + mp->m_metafile_resv_avail);
if (to_resv > 0) {
to_resv = min_t(int64_t, to_resv, len);
- ip->i_delayed_blks += to_resv;
+ mp->m_metafile_resv_avail += to_resv;
xfs_mod_delalloc(ip, 0, to_resv);
xfs_trans_mod_sb(tp, XFS_TRANS_SB_RES_FDBLOCKS, to_resv);
len -= to_resv;
}
+ mutex_unlock(&mp->m_metafile_resv_lock);
/*
* Everything else goes back to the filesystem, so update the in-core
xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, len);
}
-/* Release a metadata file's space reservation. */
+static void
+__xfs_metafile_resv_free(
+ struct xfs_mount *mp)
+{
+ if (mp->m_metafile_resv_avail) {
+ xfs_mod_sb_delalloc(mp, -(int64_t)mp->m_metafile_resv_avail);
+ xfs_add_fdblocks(mp, mp->m_metafile_resv_avail);
+ }
+ mp->m_metafile_resv_avail = 0;
+ mp->m_metafile_resv_used = 0;
+ mp->m_metafile_resv_target = 0;
+}
+
+/* Release unused metafile space reservation. */
void
xfs_metafile_resv_free(
- struct xfs_inode *ip)
+ struct xfs_mount *mp)
{
- /* Non-btree metadata inodes don't need space reservations. */
- if (!ip || !ip->i_meta_resv_asked)
+ if (!xfs_has_metadir(mp))
return;
- ASSERT(xfs_is_metadir_inode(ip));
- trace_xfs_metafile_resv_free(ip, 0);
+ trace_xfs_metafile_resv_free(mp, 0);
- if (ip->i_delayed_blks) {
- xfs_mod_delalloc(ip, 0, -ip->i_delayed_blks);
- xfs_add_fdblocks(ip->i_mount, ip->i_delayed_blks);
- ip->i_delayed_blks = 0;
- }
- ip->i_meta_resv_asked = 0;
+ mutex_lock(&mp->m_metafile_resv_lock);
+ __xfs_metafile_resv_free(mp);
+ mutex_unlock(&mp->m_metafile_resv_lock);
}
-/* Set up a metadata file's space reservation. */
+/* Set up a metafile space reservation. */
int
xfs_metafile_resv_init(
- struct xfs_inode *ip,
- xfs_filblks_t ask)
+ struct xfs_mount *mp)
{
+ struct xfs_rtgroup *rtg = NULL;
+ xfs_filblks_t used = 0, target = 0;
xfs_filblks_t hidden_space;
- xfs_filblks_t used;
- int error;
+ int error = 0;
- if (!ip || ip->i_meta_resv_asked > 0)
+ if (!xfs_has_metadir(mp))
return 0;
- ASSERT(xfs_is_metadir_inode(ip));
+ /*
+ * Free any previous reservation to have a clean slate.
+ */
+ mutex_lock(&mp->m_metafile_resv_lock);
+ __xfs_metafile_resv_free(mp);
+
+ /*
+ * Currently the only btree metafiles that require reservations are the
+ * rtrmap and the rtrefcount. Anything new will have to be added here
+ * as well.
+ */
+ while ((rtg = xfs_rtgroup_next(mp, rtg))) {
+ if (xfs_has_rtrmapbt(mp)) {
+ used += rtg_rmap(rtg)->i_nblocks;
+ target += xfs_rtrmapbt_calc_reserves(mp);
+ }
+ if (xfs_has_rtreflink(mp)) {
+ used += rtg_refcount(rtg)->i_nblocks;
+ target += xfs_rtrefcountbt_calc_reserves(mp);
+ }
+ }
+
+ if (!target)
+ goto out_unlock;
/*
- * Space taken by all other metadata btrees are accounted on-disk as
+ * Space taken by the per-AG metadata btrees are accounted on-disk as
* used space. We therefore only hide the space that is reserved but
* not used by the trees.
*/
- used = ip->i_nblocks;
- if (used > ask)
- ask = used;
- hidden_space = ask - used;
+ if (used > target)
+ target = used;
+ hidden_space = target - used;
- error = xfs_dec_fdblocks(ip->i_mount, hidden_space, true);
+ error = xfs_dec_fdblocks(mp, hidden_space, true);
if (error) {
- trace_xfs_metafile_resv_init_error(ip, error, _RET_IP_);
- return error;
+ trace_xfs_metafile_resv_init_error(mp, 0);
+ goto out_unlock;
}
- xfs_mod_delalloc(ip, 0, hidden_space);
- ip->i_delayed_blks = hidden_space;
- ip->i_meta_resv_asked = ask;
+ xfs_mod_sb_delalloc(mp, hidden_space);
+
+ mp->m_metafile_resv_target = target;
+ mp->m_metafile_resv_used = used;
+ mp->m_metafile_resv_avail = hidden_space;
+
+ trace_xfs_metafile_resv_init(mp, target);
- trace_xfs_metafile_resv_init(ip, ask);
- return 0;
+out_unlock:
+ mutex_unlock(&mp->m_metafile_resv_lock);
+ return error;
}
projects / users / hch / xfsprogs.git / commitdiff