> -----Original Message----- > From: Andy Adamson [mailto:androsadamson@xxxxxxxxx] > Sent: Monday, September 24, 2012 10:48 AM > To: Myklebust, Trond > Cc: linux-nfs@xxxxxxxxxxxxxxx > Subject: Re: [PATCH v2 06/26] NFSv4.1: Add helpers for setting/reading the > I/O fail bit > > On Fri, Sep 21, 2012 at 4:50 PM, Trond Myklebust > <Trond.Myklebust@xxxxxxxxxx> wrote: > > ...and make them local to the pnfs.c file. > > > > Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx> > > --- > > fs/nfs/pnfs.c | 37 ++++++++++++++++++++++++++----------- > > fs/nfs/pnfs.h | 6 ------ > > 2 files changed, 26 insertions(+), 17 deletions(-) > > > > diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 498af87..f85cc4c > > 100644 > > --- a/fs/nfs/pnfs.c > > +++ b/fs/nfs/pnfs.c > > @@ -238,6 +238,27 @@ pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) > > } > > } > > > > +static int > > +pnfs_iomode_to_fail_bit(u32 iomode) > > +{ > > + return iomode == IOMODE_RW ? > > + NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; } > > + > > +static void > > +pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) { > > + set_bit(pnfs_iomode_to_fail_bit(iomode), &lo->plh_flags); > > + dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, > > + iomode == IOMODE_RW ? "RW" : "READ"); } > > + > > +static bool > > +pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) > > > Nit - this is a bad name. These bits test if LAYOUTGET succeeds or not. They > do not test whether IO succeeded or failed. I suggest > pnfs_layoutget_test_failed. Blocks uses them to signal that the I/O actually failed. See the use of pnfs_set_lo_fail(). Then there is the use in _pnfs_return_layout(), where it simply signals an ENOMEM error. > -->Andy > > > +{ > > + return test_bit(pnfs_iomode_to_fail_bit(iomode), > > +&lo->plh_flags) != 0; } > > + > > static void > > init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment > > *lseg) { @@ -612,7 +633,7 @@ send_layoutget(struct pnfs_layout_hdr > > *lo, > > break; > > default: > > /* remember that LAYOUTGET failed and suspend trying */ > > - set_bit(lo_fail_bit(range->iomode), &lo->plh_flags); > > + pnfs_layout_io_set_failed(lo, range->iomode); > > } > > return NULL; > > } > > @@ -669,8 +690,8 @@ _pnfs_return_layout(struct inode *ino) > > lrp = kzalloc(sizeof(*lrp), GFP_KERNEL); > > if (unlikely(lrp == NULL)) { > > status = -ENOMEM; > > - set_bit(NFS_LAYOUT_RW_FAILED, &lo->plh_flags); > > - set_bit(NFS_LAYOUT_RO_FAILED, &lo->plh_flags); > > + pnfs_layout_io_set_failed(lo, IOMODE_RW); > > + pnfs_layout_io_set_failed(lo, IOMODE_READ); > > pnfs_clear_layout_returned(lo); > > pnfs_put_layout_hdr(lo); > > goto out; > > @@ -1046,7 +1067,7 @@ pnfs_update_layout(struct inode *ino, > > } > > > > /* if LAYOUTGET already failed once we don't try again */ > > - if (test_bit(lo_fail_bit(iomode), &nfsi->layout->plh_flags)) > > + if (pnfs_layout_io_test_failed(nfsi->layout, iomode)) > > goto out_unlock; > > > > /* Check to see if the layout for the given range already > > exists */ @@ -1581,13 +1602,7 @@ static void > > pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) > > > > void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) { > > - if (lseg->pls_range.iomode == IOMODE_RW) { > > - dprintk("%s Setting layout IOMODE_RW fail bit\n", __func__); > > - set_bit(lo_fail_bit(IOMODE_RW), &lseg->pls_layout->plh_flags); > > - } else { > > - dprintk("%s Setting layout IOMODE_READ fail bit\n", __func__); > > - set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags); > > - } > > + pnfs_layout_io_set_failed(lseg->pls_layout, > > + lseg->pls_range.iomode); > > } > > EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); > > > > diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 0495879..e3eb7d1 > > 100644 > > --- a/fs/nfs/pnfs.h > > +++ b/fs/nfs/pnfs.h > > @@ -274,12 +274,6 @@ pnfs_test_layout_returned(struct > pnfs_layout_hdr *lo) > > return test_bit(NFS_LAYOUT_RETURNED, &lo->plh_flags); } > > > > -static inline int lo_fail_bit(u32 iomode) -{ > > - return iomode == IOMODE_RW ? > > - NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; > > -} > > - > > static inline struct pnfs_layout_segment * pnfs_get_lseg(struct > > pnfs_layout_segment *lseg) { > > -- > > 1.7.11.4 > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-nfs" > > in the body of a message to majordomo@xxxxxxxxxxxxxxx More > majordomo > > info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
