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pnfs: Use byte-range for cb_layoutrecall 

Use recalled range to invalidate particular layout segments in the layout cache.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
This commit is contained in:
Benny Halevy 2011-05-22 19:48:02 +03:00 committed by Boaz Harrosh
parent 707ed5fdb5
commit 778b5502fd
3 changed files with 12 additions and 9 deletions
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4
fs/nfs/callback_proc.c
View File

@ -139,7 +139,7 @@ static u32 initiate_file_draining(struct nfs_client *clp,
spin_lock(&ino->i_lock);
if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
mark_matching_lsegs_invalid(lo, &free_me_list,
args->cbl_range.iomode))
&args->cbl_range))
rv = NFS4ERR_DELAY;
else
rv = NFS4ERR_NOMATCHING_LAYOUT;
@ -184,7 +184,7 @@ static u32 initiate_bulk_draining(struct nfs_client *clp,
ino = lo->plh_inode;
spin_lock(&ino->i_lock);
set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
if (mark_matching_lsegs_invalid(lo, &free_me_list, range.iomode))
if (mark_matching_lsegs_invalid(lo, &free_me_list, &range))
rv = NFS4ERR_DELAY;
list_del_init(&lo->plh_bulk_recall);
spin_unlock(&ino->i_lock);

15
fs/nfs/pnfs.c
View File

@ -321,10 +321,12 @@ lo_seg_intersecting(struct pnfs_layout_range *l1,
}
static bool
should_free_lseg(u32 lseg_iomode, u32 recall_iomode)
should_free_lseg(struct pnfs_layout_range *lseg_range,
struct pnfs_layout_range *recall_range)
{
return (recall_iomode == IOMODE_ANY ||
lseg_iomode == recall_iomode);
return (recall_range->iomode == IOMODE_ANY ||
lseg_range->iomode == recall_range->iomode) &&
lo_seg_intersecting(lseg_range, recall_range);
}
/* Returns 1 if lseg is removed from list, 0 otherwise */
@ -355,7 +357,7 @@ static int mark_lseg_invalid(struct pnfs_layout_segment *lseg,
int
mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
u32 iomode)
struct pnfs_layout_range *recall_range)
{
struct pnfs_layout_segment *lseg, *next;
int invalid = 0, removed = 0;
@ -368,7 +370,8 @@ mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
return 0;
}
list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
if (should_free_lseg(lseg->pls_range.iomode, iomode)) {
if (!recall_range ||
should_free_lseg(&lseg->pls_range, recall_range)) {
dprintk("%s: freeing lseg %p iomode %d "
"offset %llu length %llu\n", __func__,
lseg, lseg->pls_range.iomode, lseg->pls_range.offset,
@ -417,7 +420,7 @@ pnfs_destroy_layout(struct nfs_inode *nfsi)
lo = nfsi->layout;
if (lo) {
lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */
mark_matching_lsegs_invalid(lo, &tmp_list, IOMODE_ANY);
mark_matching_lsegs_invalid(lo, &tmp_list, NULL);
}
spin_unlock(&nfsi->vfs_inode.i_lock);
pnfs_free_lseg_list(&tmp_list);

2
fs/nfs/pnfs.h
View File

@ -154,7 +154,7 @@ int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
struct nfs4_state *open_state);
int mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
u32 iomode);
struct pnfs_layout_range *recall_range);
bool pnfs_roc(struct inode *ino);
void pnfs_roc_release(struct inode *ino);
void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);