summaryrefslogtreecommitdiffstats
path: root/fs/zonefs
diff options
context:
space:
mode:
authorDamien Le Moal <damien.lemoal@wdc.com>2021-03-15 12:43:55 +0900
committerDamien Le Moal <damien.lemoal@wdc.com>2021-03-16 17:38:35 +0900
commit1601ea068b886da1f8f8d4e18b9403e9e24adef6 (patch)
tree388156bc65ac5c0168b7e1a10f8a383f39576247 /fs/zonefs
parent1e28eed17697bcf343c6743f0028cc3b5dd88bf0 (diff)
downloadlinux-1601ea068b886da1f8f8d4e18b9403e9e24adef6.tar.bz2
zonefs: prevent use of seq files as swap file
The sequential write constraint of sequential zone file prevent their use as swap files. Only allow conventional zone files to be used as swap files. Fixes: 8dcc1a9d90c1 ("fs: New zonefs file system") Cc: <stable@vger.kernel.org> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Diffstat (limited to 'fs/zonefs')
-rw-r--r--fs/zonefs/super.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index 0fe76f376dee..a3d074f98660 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -165,6 +165,21 @@ static int zonefs_writepages(struct address_space *mapping,
return iomap_writepages(mapping, wbc, &wpc, &zonefs_writeback_ops);
}
+static int zonefs_swap_activate(struct swap_info_struct *sis,
+ struct file *swap_file, sector_t *span)
+{
+ struct inode *inode = file_inode(swap_file);
+ struct zonefs_inode_info *zi = ZONEFS_I(inode);
+
+ if (zi->i_ztype != ZONEFS_ZTYPE_CNV) {
+ zonefs_err(inode->i_sb,
+ "swap file: not a conventional zone file\n");
+ return -EINVAL;
+ }
+
+ return iomap_swapfile_activate(sis, swap_file, span, &zonefs_iomap_ops);
+}
+
static const struct address_space_operations zonefs_file_aops = {
.readpage = zonefs_readpage,
.readahead = zonefs_readahead,
@@ -177,6 +192,7 @@ static const struct address_space_operations zonefs_file_aops = {
.is_partially_uptodate = iomap_is_partially_uptodate,
.error_remove_page = generic_error_remove_page,
.direct_IO = noop_direct_IO,
+ .swap_activate = zonefs_swap_activate,
};
static void zonefs_update_stats(struct inode *inode, loff_t new_isize)