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| author |   Andreas Gruenbacher <agruenba@redhat.com> | 2019-07-12 15:57:52 +0200 |
|---|---|---|
| committer | Andreas Gruenbacher <agruenba@redhat.com> | 2019-08-09 17:00:50 +0100 |
| commit | 72d36d0529c6d9ee8b950c819508b1e344d8cc4f (patch) | |
| tree | ab590c9a5ab67fd8b5869f98fa822c1ec8c053ff /fs/gfs2 | |
| parent | gfs2: gfs2_iomap_begin cleanup (diff) | |
| download | wireguard-linux-72d36d0529c6d9ee8b950c819508b1e344d8cc4f.tar.xz wireguard-linux-72d36d0529c6d9ee8b950c819508b1e344d8cc4f.zip | |
gfs2: Add support for IOMAP_ZERO
Add support for the IOMAP_ZERO iomap operation so that iomap_zero_range will
work as expected. In the IOMAP_ZERO case, the caller of iomap_zero_range is
responsible for taking an exclusive glock on the inode, so we need no
additional locking in gfs2_iomap_begin.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2')
| -rw-r--r-- | fs/gfs2/bmap.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 907b79483050..8431c14c3ee1 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -1168,7 +1168,7 @@ static int gfs2_iomap_begin(struct inode *inode, loff_t pos, loff_t length, if (ret) goto out_unlock; - switch(flags & IOMAP_WRITE) { + switch(flags & (IOMAP_WRITE | IOMAP_ZERO)) { case IOMAP_WRITE: if (flags & IOMAP_DIRECT) { /* @@ -1180,6 +1180,10 @@ static int gfs2_iomap_begin(struct inode *inode, loff_t pos, loff_t length, goto out_unlock; } break; + case IOMAP_ZERO: + if (iomap->type == IOMAP_HOLE) + goto out_unlock; + break; default: goto out_unlock; } @@ -1201,11 +1205,15 @@ static int gfs2_iomap_end(struct inode *inode, loff_t pos, loff_t length, struct gfs2_inode *ip = GFS2_I(inode); struct gfs2_sbd *sdp = GFS2_SB(inode); - switch (flags & IOMAP_WRITE) { + switch (flags & (IOMAP_WRITE | IOMAP_ZERO)) { case IOMAP_WRITE: if (flags & IOMAP_DIRECT) return 0; break; + case IOMAP_ZERO: + if (iomap->type == IOMAP_HOLE) + return 0; + break; default: return 0; } |