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xfs: per-filesystem stats counter implementation

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This patch modifies the stats counting macros and the callers
to those macros to properly increment, decrement, and add-to
the xfs stats counts. The counts for global and per-fs stats
are correctly advanced, and cleared by writing a "1" to the
corresponding clear file.

global counts: /sys/fs/xfs/stats/stats
per-fs counts: /sys/fs/xfs/sda*/stats/stats

global clear:  /sys/fs/xfs/stats/stats_clear
per-fs clear:  /sys/fs/xfs/sda*/stats/stats_clear

[dchinner: cleaned up macro variables, removed CONFIG_FS_PROC around
 stats structures and macros. ]

Signed-off-by: Bill O'Donnell <billodo@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Bill O'Donnell
2015-10-12 18:21:22 +11:00
committed by Dave Chinner
parent 225e463558
commit ff6d6af235
21 changed files with 131 additions and 118 deletions
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12
fs/xfs/xfs_file.c
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@@ -287,7 +287,7 @@ xfs_file_read_iter(
xfs_fsize_t n;
loff_t pos = iocb->ki_pos;
XFS_STATS_INC(xs_read_calls);
XFS_STATS_INC(mp, xs_read_calls);
if (unlikely(iocb->ki_flags & IOCB_DIRECT))
ioflags |= XFS_IO_ISDIRECT;
@@ -365,7 +365,7 @@ xfs_file_read_iter(
ret = generic_file_read_iter(iocb, to);
if (ret > 0)
XFS_STATS_ADD(xs_read_bytes, ret);
XFS_STATS_ADD(mp, xs_read_bytes, ret);
xfs_rw_iunlock(ip, XFS_IOLOCK_SHARED);
return ret;
@@ -383,7 +383,7 @@ xfs_file_splice_read(
int ioflags = 0;
ssize_t ret;
XFS_STATS_INC(xs_read_calls);
XFS_STATS_INC(ip->i_mount, xs_read_calls);
if (infilp->f_mode & FMODE_NOCMTIME)
ioflags |= XFS_IO_INVIS;
@@ -401,7 +401,7 @@ xfs_file_splice_read(
else
ret = generic_file_splice_read(infilp, ppos, pipe, count, flags);
if (ret > 0)
XFS_STATS_ADD(xs_read_bytes, ret);
XFS_STATS_ADD(ip->i_mount, xs_read_bytes, ret);
xfs_rw_iunlock(ip, XFS_IOLOCK_SHARED);
return ret;
@@ -867,7 +867,7 @@ xfs_file_write_iter(
ssize_t ret;
size_t ocount = iov_iter_count(from);
XFS_STATS_INC(xs_write_calls);
XFS_STATS_INC(ip->i_mount, xs_write_calls);
if (ocount == 0)
return 0;
@@ -883,7 +883,7 @@ xfs_file_write_iter(
if (ret > 0) {
ssize_t err;
XFS_STATS_ADD(xs_write_bytes, ret);
XFS_STATS_ADD(ip->i_mount, xs_write_bytes, ret);
/* Handle various SYNC-type writes */
err = generic_write_sync(file, iocb->ki_pos - ret, ret);