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authorShen Feng <shen@cn.fujitsu.com>2008-07-11 19:27:31 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-07-11 19:27:31 -0400
commitfdf6c7a7683c6272e953a33358920e98a4d93cf0 (patch)
tree173830a929ad743561c7243b181cf4b3f4528c96 /fs/ext4/mballoc.c
parent31b481dc7c249eac0a108ec5dfc0d4aef2217e39 (diff)
ext4: add error processing when calling ext4_mb_init_cache in mballoc
Add error processing for ext4_mb_load_buddy when it calls ext4_mb_init_cache. Signed-off-by: Shen Feng <shen@cn.fujitsu.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/mballoc.c')
-rw-r--r--fs/ext4/mballoc.c27
1 files changed, 20 insertions, 7 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index d429014071c0..b64600be2066 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -890,6 +890,7 @@ ext4_mb_load_buddy(struct super_block *sb, ext4_group_t group,
890 int pnum; 890 int pnum;
891 int poff; 891 int poff;
892 struct page *page; 892 struct page *page;
893 int ret;
893 894
894 mb_debug("load group %lu\n", group); 895 mb_debug("load group %lu\n", group);
895 896
@@ -921,15 +922,21 @@ ext4_mb_load_buddy(struct super_block *sb, ext4_group_t group,
921 if (page) { 922 if (page) {
922 BUG_ON(page->mapping != inode->i_mapping); 923 BUG_ON(page->mapping != inode->i_mapping);
923 if (!PageUptodate(page)) { 924 if (!PageUptodate(page)) {
924 ext4_mb_init_cache(page, NULL); 925 ret = ext4_mb_init_cache(page, NULL);
926 if (ret) {
927 unlock_page(page);
928 goto err;
929 }
925 mb_cmp_bitmaps(e4b, page_address(page) + 930 mb_cmp_bitmaps(e4b, page_address(page) +
926 (poff * sb->s_blocksize)); 931 (poff * sb->s_blocksize));
927 } 932 }
928 unlock_page(page); 933 unlock_page(page);
929 } 934 }
930 } 935 }
931 if (page == NULL || !PageUptodate(page)) 936 if (page == NULL || !PageUptodate(page)) {
937 ret = -EIO;
932 goto err; 938 goto err;
939 }
933 e4b->bd_bitmap_page = page; 940 e4b->bd_bitmap_page = page;
934 e4b->bd_bitmap = page_address(page) + (poff * sb->s_blocksize); 941 e4b->bd_bitmap = page_address(page) + (poff * sb->s_blocksize);
935 mark_page_accessed(page); 942 mark_page_accessed(page);
@@ -945,14 +952,20 @@ ext4_mb_load_buddy(struct super_block *sb, ext4_group_t group,
945 page = find_or_create_page(inode->i_mapping, pnum, GFP_NOFS); 952 page = find_or_create_page(inode->i_mapping, pnum, GFP_NOFS);
946 if (page) { 953 if (page) {
947 BUG_ON(page->mapping != inode->i_mapping); 954 BUG_ON(page->mapping != inode->i_mapping);
948 if (!PageUptodate(page)) 955 if (!PageUptodate(page)) {
949 ext4_mb_init_cache(page, e4b->bd_bitmap); 956 ret = ext4_mb_init_cache(page, e4b->bd_bitmap);
950 957 if (ret) {
958 unlock_page(page);
959 goto err;
960 }
961 }
951 unlock_page(page); 962 unlock_page(page);
952 } 963 }
953 } 964 }
954 if (page == NULL || !PageUptodate(page)) 965 if (page == NULL || !PageUptodate(page)) {
966 ret = -EIO;
955 goto err; 967 goto err;
968 }
956 e4b->bd_buddy_page = page; 969 e4b->bd_buddy_page = page;
957 e4b->bd_buddy = page_address(page) + (poff * sb->s_blocksize); 970 e4b->bd_buddy = page_address(page) + (poff * sb->s_blocksize);
958 mark_page_accessed(page); 971 mark_page_accessed(page);
@@ -969,7 +982,7 @@ err:
969 page_cache_release(e4b->bd_buddy_page); 982 page_cache_release(e4b->bd_buddy_page);
970 e4b->bd_buddy = NULL; 983 e4b->bd_buddy = NULL;
971 e4b->bd_bitmap = NULL; 984 e4b->bd_bitmap = NULL;
972 return -EIO; 985 return ret;
973} 986}
974 987
975static void ext4_mb_release_desc(struct ext4_buddy *e4b) 988static void ext4_mb_release_desc(struct ext4_buddy *e4b)