diff options
| -rw-r--r-- | fs/nfs/pnfs.c | 40 |
1 files changed, 32 insertions, 8 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index d7a8f03e7295..6834fa1be571 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -247,10 +247,28 @@ pnfs_iomode_to_fail_bit(u32 iomode) } static void -pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) +pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) { lo->plh_retry_timestamp = jiffies; - set_bit(pnfs_iomode_to_fail_bit(iomode), &lo->plh_flags); + if (test_and_set_bit(fail_bit, &lo->plh_flags)) + atomic_inc(&lo->plh_refcount); +} + +static void +pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) +{ + if (test_and_clear_bit(fail_bit, &lo->plh_flags)) + atomic_dec(&lo->plh_refcount); +} + +static void +pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) +{ + struct inode *inode = lo->plh_inode; + + spin_lock(&inode->i_lock); + pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); + spin_unlock(&inode->i_lock); dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, iomode == IOMODE_RW ? "RW" : "READ"); } @@ -259,14 +277,15 @@ static bool pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) { unsigned long start, end; - if (test_bit(pnfs_iomode_to_fail_bit(iomode), &lo->plh_flags) == 0) + int fail_bit = pnfs_iomode_to_fail_bit(iomode); + + if (test_bit(fail_bit, &lo->plh_flags) == 0) return false; end = jiffies; start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; if (!time_in_range(lo->plh_retry_timestamp, start, end)) { /* It is time to retry the failed layoutgets */ - clear_bit(NFS_LAYOUT_RW_FAILED, &lo->plh_flags); - clear_bit(NFS_LAYOUT_RO_FAILED, &lo->plh_flags); + pnfs_layout_clear_fail_bit(lo, fail_bit); return false; } return true; @@ -493,9 +512,14 @@ pnfs_destroy_layout(struct nfs_inode *nfsi) if (lo) { lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); - } - spin_unlock(&nfsi->vfs_inode.i_lock); - pnfs_free_lseg_list(&tmp_list); + pnfs_get_layout_hdr(lo); + pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); + pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); + spin_unlock(&nfsi->vfs_inode.i_lock); + pnfs_free_lseg_list(&tmp_list); + pnfs_put_layout_hdr(lo); + } else + spin_unlock(&nfsi->vfs_inode.i_lock); } EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |