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| author |   Andrew Price <anprice@redhat.com> | 2022-03-22 19:05:51 +0000 |
|---|---|---|
| committer |   Andreas Gruenbacher <agruenba@redhat.com> | 2022-03-31 20:35:38 +0200 |
| commit | 27ca8273fda398638ca994a207323a85b6d81190 (patch) | |
| tree | 85b1cf4acb2ffaaf96c105d245ba30c393f180f9 | |
| parent | gfs2: Make sure not to return short direct writes (diff) | |
| download | linux-dev-27ca8273fda398638ca994a207323a85b6d81190.tar.xz linux-dev-27ca8273fda398638ca994a207323a85b6d81190.zip | |
gfs2: Make sure FITRIM minlen is rounded up to fs block size
Per fstrim(8) we must round up the minlen argument to the fs block size.
The current calculation doesn't take into account devices that have a
discard granularity and requested minlen less than 1 fs block, so the
value can get shifted away to zero in the translation to fs blocks.
The zero minlen passed to gfs2_rgrp_send_discards() then allows
sb_issue_discard() to be called with nr_sects == 0 which returns -EINVAL
and results in gfs2_rgrp_send_discards() returning -EIO.
Make sure minlen is never < 1 fs block by taking the max of the
requested minlen and the fs block size before comparing to the device's
discard granularity and shifting to fs blocks.
Fixes: 076f0faa764ab ("GFS2: Fix FITRIM argument handling")
Signed-off-by: Andrew Price <anprice@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
| -rw-r--r-- | fs/gfs2/rgrp.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 9df8a84f85a6..801ad9f4f2be 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -1417,7 +1417,8 @@ int gfs2_fitrim(struct file *filp, void __user *argp) start = r.start >> bs_shift; end = start + (r.len >> bs_shift); - minlen = max_t(u64, r.minlen, + minlen = max_t(u64, r.minlen, sdp->sd_sb.sb_bsize); + minlen = max_t(u64, minlen, q->limits.discard_granularity) >> bs_shift; if (end <= start || minlen > sdp->sd_max_rg_data) |