The patch titled
ufs: don't truncate longer ufs2 fast symlinks
has been added to the -mm tree. Its filename is
ufs-dont-truncate-longer-ufs2-fast-symlinks.patch
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------------------------------------------------------
Subject: ufs: don't truncate longer ufs2 fast symlinks
From: Duane Griffin <duaneg@xxxxxxxxx>
ufs2 fast symlinks can be twice as long as ufs ones, however the code was
using the ufs size in various places. Fix that so ufs2 symlinks over 60
characters aren't truncated.
Note that we copy the entire area instead of using the maxsymlinklen field
from the superblock. This way we will be more robust against corruption
(of the superblock).
While we are at it, use memcpy instead of open-coding it with for loops.
Signed-off-by: Duane Griffin <duaneg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ufs/inode.c | 37 ++++++++++++++++---------------------
fs/ufs/ufs.h | 2 +-
2 files changed, 17 insertions(+), 22 deletions(-)
diff -puN fs/ufs/inode.c~ufs-dont-truncate-longer-ufs2-fast-symlinks fs/ufs/inode.c
--- a/fs/ufs/inode.c~ufs-dont-truncate-longer-ufs2-fast-symlinks
+++ a/fs/ufs/inode.c
@@ -614,7 +614,6 @@ static int ufs1_read_inode(struct inode
struct ufs_inode_info *ufsi = UFS_I(inode);
struct super_block *sb = inode->i_sb;
mode_t mode;
- unsigned i;
/*
* Copy data to the in-core inode.
@@ -647,11 +646,11 @@ static int ufs1_read_inode(struct inode
if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
- for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
- ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i];
+ memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
+ sizeof(ufs_inode->ui_u2.ui_addr));
} else {
- for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
- ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i];
+ memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
+ sizeof(ufs_inode->ui_u2.ui_symlink));
}
return 0;
}
@@ -661,7 +660,6 @@ static int ufs2_read_inode(struct inode
struct ufs_inode_info *ufsi = UFS_I(inode);
struct super_block *sb = inode->i_sb;
mode_t mode;
- unsigned i;
UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
/*
@@ -696,12 +694,11 @@ static int ufs2_read_inode(struct inode
*/
if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
- for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
- ufsi->i_u1.u2_i_data[i] =
- ufs2_inode->ui_u2.ui_addr.ui_db[i];
+ memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
+ sizeof(ufs2_inode->ui_u2.ui_addr));
} else {
- for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
- ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i];
+ memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
+ sizeof(ufs2_inode->ui_u2.ui_symlink));
}
return 0;
}
@@ -773,7 +770,6 @@ static void ufs1_update_inode(struct ino
{
struct super_block *sb = inode->i_sb;
struct ufs_inode_info *ufsi = UFS_I(inode);
- unsigned i;
ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
@@ -801,12 +797,12 @@ static void ufs1_update_inode(struct ino
/* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
} else if (inode->i_blocks) {
- for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
- ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i];
+ memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
+ sizeof(ufs_inode->ui_u2.ui_addr));
}
else {
- for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
- ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i];
+ memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
+ sizeof(ufs_inode->ui_u2.ui_symlink));
}
if (!inode->i_nlink)
@@ -817,7 +813,6 @@ static void ufs2_update_inode(struct ino
{
struct super_block *sb = inode->i_sb;
struct ufs_inode_info *ufsi = UFS_I(inode);
- unsigned i;
UFSD("ENTER\n");
ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
@@ -842,11 +837,11 @@ static void ufs2_update_inode(struct ino
/* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
} else if (inode->i_blocks) {
- for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
- ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.u2_i_data[i];
+ memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
+ sizeof(ufs_inode->ui_u2.ui_addr));
} else {
- for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
- ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i];
+ memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
+ sizeof(ufs_inode->ui_u2.ui_symlink));
}
if (!inode->i_nlink)
diff -puN fs/ufs/ufs.h~ufs-dont-truncate-longer-ufs2-fast-symlinks fs/ufs/ufs.h
--- a/fs/ufs/ufs.h~ufs-dont-truncate-longer-ufs2-fast-symlinks
+++ a/fs/ufs/ufs.h
@@ -23,7 +23,7 @@ struct ufs_sb_info {
struct ufs_inode_info {
union {
__fs32 i_data[15];
- __u8 i_symlink[4*15];
+ __u8 i_symlink[2 * 4 * 15];
__fs64 u2_i_data[15];
} i_u1;
__u32 i_flags;
_
Patches currently in -mm which might be from duaneg@xxxxxxxxx are
ext4-dont-inherit-inappropriate-inode-flags-from-parent.patch
ext4-tighten-restrictions-on-inode-flags.patch
ufs-validate-maximum-fast-symlink-size-from-superblock.patch
ufs-dont-truncate-longer-ufs2-fast-symlinks.patch
ufs-ensure-fast-symlinks-are-nul-terminated.patch
ufs-copy-symlink-data-into-the-correct-union-member.patch
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