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Safely handle security / ACL failures

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The security and ACL operations should all be performed atomically.
To accomplish this there would need to significant invasive changes
made to the common code base.  For the moment it's desirable for
compatibility reasons to avoid this.  Therefore the code has been
updated to attempt to unwind the operation in case of failure
rather than panic.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2445
This commit is contained in:
David Lamparter 2014-07-02 23:47:02 +02:00 committed by Brian Behlendorf
parent 76d520675e
commit 214806c7e9
1 changed files with 25 additions and 7 deletions
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32
module/zfs/zpl_inode.c
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@ -107,9 +107,14 @@ zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode,
cookie = spl_fstrans_mark(); cookie = spl_fstrans_mark();
error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL); error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL);
if (error == 0) { if (error == 0) {
VERIFY0(zpl_xattr_security_init(ip, dir, &dentry->d_name));
VERIFY0(zpl_init_acl(ip, dir));
d_instantiate(dentry, ip); d_instantiate(dentry, ip);
error = zpl_xattr_security_init(ip, dir, &dentry->d_name);
if (error == 0)
error = zpl_init_acl(ip, dir);
if (error)
(void) zfs_remove(dir, dname(dentry), cr);
} }
spl_fstrans_unmark(cookie); spl_fstrans_unmark(cookie);
@ -145,9 +150,14 @@ zpl_mknod(struct inode *dir, struct dentry *dentry, zpl_umode_t mode,
cookie = spl_fstrans_mark(); cookie = spl_fstrans_mark();
error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL); error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL);
if (error == 0) { if (error == 0) {
VERIFY0(zpl_xattr_security_init(ip, dir, &dentry->d_name));
VERIFY0(zpl_init_acl(ip, dir));
d_instantiate(dentry, ip); d_instantiate(dentry, ip);
error = zpl_xattr_security_init(ip, dir, &dentry->d_name);
if (error == 0)
error = zpl_init_acl(ip, dir);
if (error)
(void) zfs_remove(dir, dname(dentry), cr);
} }
spl_fstrans_unmark(cookie); spl_fstrans_unmark(cookie);
@ -191,9 +201,14 @@ zpl_mkdir(struct inode *dir, struct dentry *dentry, zpl_umode_t mode)
cookie = spl_fstrans_mark(); cookie = spl_fstrans_mark();
error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL); error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL);
if (error == 0) { if (error == 0) {
VERIFY0(zpl_xattr_security_init(ip, dir, &dentry->d_name));
VERIFY0(zpl_init_acl(ip, dir));
d_instantiate(dentry, ip); d_instantiate(dentry, ip);
error = zpl_xattr_security_init(ip, dir, &dentry->d_name);
if (error == 0)
error = zpl_init_acl(ip, dir);
if (error)
(void) zfs_rmdir(dir, dname(dentry), NULL, cr, 0);
} }
spl_fstrans_unmark(cookie); spl_fstrans_unmark(cookie);
@ -318,8 +333,11 @@ zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name)
cookie = spl_fstrans_mark(); cookie = spl_fstrans_mark();
error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0); error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0);
if (error == 0) { if (error == 0) {
VERIFY0(zpl_xattr_security_init(ip, dir, &dentry->d_name));
d_instantiate(dentry, ip); d_instantiate(dentry, ip);
error = zpl_xattr_security_init(ip, dir, &dentry->d_name);
if (error)
(void) zfs_remove(dir, dname(dentry), cr);
} }
spl_fstrans_unmark(cookie); spl_fstrans_unmark(cookie);