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| author | Stuart Brodsky <sbrodsky@sgi.com> | 2010-08-24 05:46:05 +0400 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2010-08-24 05:46:05 +0400 |
| commit | 2fe33661fcd79d4c53022509f7223d526b5fa233 (patch) | |
| tree | 1c26f0ca23372dc7142fa4f9395056c529378801 /fs/xfs/xfs_fsops.h | |
| parent | efceab1d563153a2b1a6e7d35376241a48126989 (diff) | |
| download | linux-2fe33661fcd79d4c53022509f7223d526b5fa233.tar.xz | |
xfs: ensure f_ffree returned by statfs() is non-negative
Because of delayed updates to sb_icount field in the super block, it
is possible to allocate over maxicount number of inodes. This
causes the arithmetic to calculate a negative number of free inodes
in user commands like df or stat -f.
Since maxicount is a somewhat arbitrary number, a slight over
allocation is not critical but user commands should be displayed as
0 or greater and never go negative. To do this the value in the
stats buffer f_ffree is capped to never go negative.
[ Modified to use max_t as per Christoph's comment. ]
Signed-off-by: Stu Brodsky <sbrodsky@sgi.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/xfs_fsops.h')
0 files changed, 0 insertions, 0 deletions