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[GFS2] Shrink & rename di_depth

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This patch forms a pair with the previous patch which shrunk
di_height. Like that patch di_depth is renamed i_depth and moved
into struct gfs2_inode directly. Also the field goes from 16 bits
to 8 bits since it is also limited to a max value which is rather
small (17 in this case). In addition we also now validate the field
against this maximum value when its read in.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse
2008-02-01 09:23:44 +00:00
parent cf45b752c9
commit 9a0045088d
3 changed files with 25 additions and 22 deletions
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11
fs/gfs2/inode.c
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@@ -248,7 +248,7 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
{
struct gfs2_dinode_host *di = &ip->i_di;
const struct gfs2_dinode *str = buf;
u16 height;
u16 height, depth;
if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
goto corrupt;
@@ -293,7 +293,10 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
goto corrupt;
ip->i_height = (u8)height;
di->di_depth = be16_to_cpu(str->di_depth);
depth = be16_to_cpu(str->di_depth);
if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
goto corrupt;
ip->i_depth = (u8)depth;
di->di_entries = be32_to_cpu(str->di_entries);
di->di_eattr = be64_to_cpu(str->di_eattr);
@@ -1410,7 +1413,7 @@ void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
!(ip->i_di.di_flags & GFS2_DIF_EXHASH) ?
GFS2_FORMAT_DE : 0);
str->di_depth = cpu_to_be16(di->di_depth);
str->di_depth = cpu_to_be16(ip->i_depth);
str->di_entries = cpu_to_be32(di->di_entries);
str->di_eattr = cpu_to_be64(di->di_eattr);
@@ -1436,7 +1439,7 @@ void gfs2_dinode_print(const struct gfs2_inode *ip)
(unsigned long long)di->di_goal_data);
printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags);
printk(KERN_INFO " i_height = %u\n", ip->i_height);
printk(KERN_INFO " di_depth = %u\n", di->di_depth);
printk(KERN_INFO " i_depth = %u\n", ip->i_depth);
printk(KERN_INFO " di_entries = %u\n", di->di_entries);
printk(KERN_INFO " di_eattr = %llu\n",
(unsigned long long)di->di_eattr);