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authorTiger Yang <tiger.yang@oracle.com>2008-11-14 11:16:41 +0800
committerMark Fasheh <mfasheh@suse.com>2009-01-05 08:34:20 -0800
commit534eadddc1de8754a227202c0e747af4973f82ce (patch)
treee044976da3644f020ed1da420211cc433dbc0a92 /fs/ocfs2/namei.c
parent923f7f3102b80403152e05aee3d55ecfce240440 (diff)
downloadlinux-534eadddc1de8754a227202c0e747af4973f82ce.tar.bz2
ocfs2: add ocfs2_init_security in during file create
Security attributes must be set when creating a new inode. We do this in three steps. - First, get security xattr's name and value by security_operation - Calculate and reserve the meta data and clusters needed by this security xattr before starting transaction - Finally, we set it before add_entry Signed-off-by: Tiger Yang <tiger.yang@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/namei.c')
-rw-r--r--fs/ocfs2/namei.c107
1 files changed, 95 insertions, 12 deletions
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index e8ff0bae179d..40da46b907fb 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -229,6 +229,12 @@ static int ocfs2_mknod(struct inode *dir,
struct inode *inode = NULL;
struct ocfs2_alloc_context *inode_ac = NULL;
struct ocfs2_alloc_context *data_ac = NULL;
+ struct ocfs2_alloc_context *xattr_ac = NULL;
+ int want_clusters = 0;
+ int xattr_credits = 0;
+ struct ocfs2_security_xattr_info si = {
+ .enable = 1,
+ };
mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
(unsigned long)dev, dentry->d_name.len,
@@ -285,17 +291,39 @@ static int ocfs2_mknod(struct inode *dir,
goto leave;
}
- /* Reserve a cluster if creating an extent based directory. */
- if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
- status = ocfs2_reserve_clusters(osb, 1, &data_ac);
+ /* get security xattr */
+ status = ocfs2_init_security_get(inode, dir, &si);
+ if (status) {
+ if (status == -EOPNOTSUPP)
+ si.enable = 0;
+ else {
+ mlog_errno(status);
+ goto leave;
+ }
+ }
+
+ /* calculate meta data/clusters for setting security xattr */
+ if (si.enable) {
+ status = ocfs2_calc_security_init(dir, &si, &want_clusters,
+ &xattr_credits, &xattr_ac);
if (status < 0) {
- if (status != -ENOSPC)
- mlog_errno(status);
+ mlog_errno(status);
goto leave;
}
}
- handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS);
+ /* Reserve a cluster if creating an extent based directory. */
+ if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb))
+ want_clusters += 1;
+
+ status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto leave;
+ }
+
+ handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS + xattr_credits);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
handle = NULL;
@@ -335,6 +363,15 @@ static int ocfs2_mknod(struct inode *dir,
inc_nlink(dir);
}
+ if (si.enable) {
+ status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
+ xattr_ac, data_ac);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+ }
+
status = ocfs2_add_entry(handle, dentry, inode,
OCFS2_I(inode)->ip_blkno, parent_fe_bh,
de_bh);
@@ -366,6 +403,8 @@ leave:
brelse(new_fe_bh);
brelse(de_bh);
brelse(parent_fe_bh);
+ kfree(si.name);
+ kfree(si.value);
if ((status < 0) && inode) {
clear_nlink(inode);
@@ -378,6 +417,9 @@ leave:
if (data_ac)
ocfs2_free_alloc_context(data_ac);
+ if (xattr_ac)
+ ocfs2_free_alloc_context(xattr_ac);
+
mlog_exit(status);
return status;
@@ -1508,6 +1550,12 @@ static int ocfs2_symlink(struct inode *dir,
handle_t *handle = NULL;
struct ocfs2_alloc_context *inode_ac = NULL;
struct ocfs2_alloc_context *data_ac = NULL;
+ struct ocfs2_alloc_context *xattr_ac = NULL;
+ int want_clusters = 0;
+ int xattr_credits = 0;
+ struct ocfs2_security_xattr_info si = {
+ .enable = 1,
+ };
mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
dentry, symname, dentry->d_name.len, dentry->d_name.name);
@@ -1561,17 +1609,39 @@ static int ocfs2_symlink(struct inode *dir,
goto bail;
}
- /* don't reserve bitmap space for fast symlinks. */
- if (l > ocfs2_fast_symlink_chars(sb)) {
- status = ocfs2_reserve_clusters(osb, 1, &data_ac);
+ /* get security xattr */
+ status = ocfs2_init_security_get(inode, dir, &si);
+ if (status) {
+ if (status == -EOPNOTSUPP)
+ si.enable = 0;
+ else {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ /* calculate meta data/clusters for setting security xattr */
+ if (si.enable) {
+ status = ocfs2_calc_security_init(dir, &si, &want_clusters,
+ &xattr_credits, &xattr_ac);
if (status < 0) {
- if (status != -ENOSPC)
- mlog_errno(status);
+ mlog_errno(status);
goto bail;
}
}
- handle = ocfs2_start_trans(osb, credits);
+ /* don't reserve bitmap space for fast symlinks. */
+ if (l > ocfs2_fast_symlink_chars(sb))
+ want_clusters += 1;
+
+ status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto bail;
+ }
+
+ handle = ocfs2_start_trans(osb, credits + xattr_credits);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
handle = NULL;
@@ -1632,6 +1702,15 @@ static int ocfs2_symlink(struct inode *dir,
}
}
+ if (si.enable) {
+ status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
+ xattr_ac, data_ac);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
status = ocfs2_add_entry(handle, dentry, inode,
le64_to_cpu(fe->i_blkno), parent_fe_bh,
de_bh);
@@ -1658,10 +1737,14 @@ bail:
brelse(new_fe_bh);
brelse(parent_fe_bh);
brelse(de_bh);
+ kfree(si.name);
+ kfree(si.value);
if (inode_ac)
ocfs2_free_alloc_context(inode_ac);
if (data_ac)
ocfs2_free_alloc_context(data_ac);
+ if (xattr_ac)
+ ocfs2_free_alloc_context(xattr_ac);
if ((status < 0) && inode) {
clear_nlink(inode);
iput(inode);