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authorLinus Torvalds <torvalds@linux-foundation.org>2010-04-21 12:31:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-04-21 12:31:12 -0700
commit255f41c59558a346d65a2012420a7573e36dc584 (patch)
treea802e21e60c7e342ad72319853b64e214091b6a9 /fs/logfs/journal.c
parent9befb55ef51ad69dd67e279b0533d4cbc5e4c6c0 (diff)
parentb6349ac89eacb813f6963f7263da05bc3f483351 (diff)
downloadlinux-255f41c59558a346d65a2012420a7573e36dc584.tar.bz2
Merge git://git.kernel.org/pub/scm/linux/kernel/git/joern/logfs
* git://git.kernel.org/pub/scm/linux/kernel/git/joern/logfs: [LogFS] Split large truncated into smaller chunks [LogFS] Set s_bdi [LogFS] Prevent mempool_destroy NULL pointer dereference [LogFS] Move assertion [LogFS] Plug 8 byte information leak [LogFS] Prevent memory corruption on large deletes [LogFS] Remove unused method Fix trivial conflict with added header includes in fs/logfs/super.c
Diffstat (limited to 'fs/logfs/journal.c')
-rw-r--r--fs/logfs/journal.c29
1 files changed, 18 insertions, 11 deletions
diff --git a/fs/logfs/journal.c b/fs/logfs/journal.c
index 33bd260b8309..fb0a613f885b 100644
--- a/fs/logfs/journal.c
+++ b/fs/logfs/journal.c
@@ -389,7 +389,10 @@ static void journal_get_erase_count(struct logfs_area *area)
static int journal_erase_segment(struct logfs_area *area)
{
struct super_block *sb = area->a_sb;
- struct logfs_segment_header sh;
+ union {
+ struct logfs_segment_header sh;
+ unsigned char c[ALIGN(sizeof(struct logfs_segment_header), 16)];
+ } u;
u64 ofs;
int err;
@@ -397,20 +400,21 @@ static int journal_erase_segment(struct logfs_area *area)
if (err)
return err;
- sh.pad = 0;
- sh.type = SEG_JOURNAL;
- sh.level = 0;
- sh.segno = cpu_to_be32(area->a_segno);
- sh.ec = cpu_to_be32(area->a_erase_count);
- sh.gec = cpu_to_be64(logfs_super(sb)->s_gec);
- sh.crc = logfs_crc32(&sh, sizeof(sh), 4);
+ memset(&u, 0, sizeof(u));
+ u.sh.pad = 0;
+ u.sh.type = SEG_JOURNAL;
+ u.sh.level = 0;
+ u.sh.segno = cpu_to_be32(area->a_segno);
+ u.sh.ec = cpu_to_be32(area->a_erase_count);
+ u.sh.gec = cpu_to_be64(logfs_super(sb)->s_gec);
+ u.sh.crc = logfs_crc32(&u.sh, sizeof(u.sh), 4);
/* This causes a bug in segment.c. Not yet. */
//logfs_set_segment_erased(sb, area->a_segno, area->a_erase_count, 0);
ofs = dev_ofs(sb, area->a_segno, 0);
- area->a_used_bytes = ALIGN(sizeof(sh), 16);
- logfs_buf_write(area, ofs, &sh, sizeof(sh));
+ area->a_used_bytes = sizeof(u);
+ logfs_buf_write(area, ofs, &u, sizeof(u));
return 0;
}
@@ -494,6 +498,8 @@ static void account_shadows(struct super_block *sb)
btree_grim_visitor64(&tree->new, (unsigned long)sb, account_shadow);
btree_grim_visitor64(&tree->old, (unsigned long)sb, account_shadow);
+ btree_grim_visitor32(&tree->segment_map, 0, NULL);
+ tree->no_shadowed_segments = 0;
if (li->li_block) {
/*
@@ -607,9 +613,9 @@ static size_t __logfs_write_je(struct super_block *sb, void *buf, u16 type,
if (len == 0)
return logfs_write_header(super, header, 0, type);
+ BUG_ON(len > sb->s_blocksize);
compr_len = logfs_compress(buf, data, len, sb->s_blocksize);
if (compr_len < 0 || type == JE_ANCHOR) {
- BUG_ON(len > sb->s_blocksize);
memcpy(data, buf, len);
compr_len = len;
compr = COMPR_NONE;
@@ -661,6 +667,7 @@ static int logfs_write_je_buf(struct super_block *sb, void *buf, u16 type,
if (ofs < 0)
return ofs;
logfs_buf_write(area, ofs, super->s_compressed_je, len);
+ BUG_ON(super->s_no_je >= MAX_JOURNAL_ENTRIES);
super->s_je_array[super->s_no_je++] = cpu_to_be64(ofs);
return 0;
}