Return all fallcoate modes supported by gfs2 file system.
Cc: cluster-devel@xxxxxxxxxx
Signed-off-by: Lukas Czerner <lczerner@xxxxxxxxxx>
---
fs/gfs2/file.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 33a0cb5..12e1de5 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -910,6 +910,14 @@ static long __gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t
return error;
}
+/*
+ * Supported fallocate modes
+ */
+#define GFS2_FALLOC_SUPPORTED (FALLOC_FL_KEEP_SIZE | \
+ FALLOC_FL_QUERY_SUPPORT | \
+ FALLOC_FL_PREALLOC_RANGE)
+
+
static long gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
{
struct inode *inode = file_inode(file);
@@ -918,11 +926,18 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t le
struct gfs2_holder gh;
int ret;
- if (mode & ~FALLOC_FL_KEEP_SIZE)
+ if (mode & ~GFS2_FALLOC_SUPPORTED)
return -EOPNOTSUPP;
+
/* fallocate is needed by gfs2_grow to reserve space in the rindex */
- if (gfs2_is_jdata(ip) && inode != sdp->sd_rindex)
+ if (gfs2_is_jdata(ip) && inode != sdp->sd_rindex) {
+ if (mode & FALLOC_FL_QUERY_SUPPORT)
+ return 0;
return -EOPNOTSUPP;
+ }
+
+ if (mode & FALLOC_FL_QUERY_SUPPORT)
+ return GFS2_FALLOC_SUPPORTED;
inode_lock(inode);
--
2.7.5
