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gfs2: retry interrupted internal reads

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The iomap-based read operations done by gfs2 for its system files, such
as rindex, may sometimes be interrupted and return -EINTR.   This
confuses some users of gfs2_internal_read().  Fix that by retrying
interrupted reads.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2023-06-07 07:19:50 -05:00
parent 6fa0a72cbb
commit cea44032bc
1 changed files with 7 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

11
fs/gfs2/aops.c
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@ -491,13 +491,16 @@ int gfs2_internal_read(struct gfs2_inode *ip, char *buf, loff_t *pos,
void *p; void *p;
do { do {
page = read_cache_page(mapping, index, gfs2_read_folio, NULL);
if (IS_ERR(page)) {
if (PTR_ERR(page) == -EINTR)
continue;
return PTR_ERR(page);
}
p = kmap_atomic(page);
amt = size - copied; amt = size - copied;
if (offset + size > PAGE_SIZE) if (offset + size > PAGE_SIZE)
amt = PAGE_SIZE - offset; amt = PAGE_SIZE - offset;
page = read_cache_page(mapping, index, gfs2_read_folio, NULL);
if (IS_ERR(page))
return PTR_ERR(page);
p = kmap_atomic(page);
memcpy(buf + copied, p + offset, amt); memcpy(buf + copied, p + offset, amt);
kunmap_atomic(p); kunmap_atomic(p);
put_page(page); put_page(page);