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Diffstat (limited to 'fs/ext4/ioctl.c')
-rw-r--r--fs/ext4/ioctl.c99
1 files changed, 71 insertions, 28 deletions
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 2162db0c747d..36eca3bc036a 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -202,7 +202,7 @@ static long swap_inode_boot_loader(struct super_block *sb,
reset_inode_seed(inode);
reset_inode_seed(inode_bl);
- ext4_discard_preallocations(inode);
+ ext4_discard_preallocations(inode, 0);
err = ext4_mark_inode_dirty(handle, inode);
if (err < 0) {
@@ -292,6 +292,38 @@ static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
return 0;
}
+static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
+{
+ struct ext4_inode_info *ei = EXT4_I(inode);
+
+ if (S_ISDIR(inode->i_mode))
+ return;
+
+ if (test_opt2(inode->i_sb, DAX_NEVER) ||
+ test_opt(inode->i_sb, DAX_ALWAYS))
+ return;
+
+ if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
+ d_mark_dontcache(inode);
+}
+
+static bool dax_compatible(struct inode *inode, unsigned int oldflags,
+ unsigned int flags)
+{
+ if (flags & EXT4_DAX_FL) {
+ if ((oldflags & EXT4_DAX_MUT_EXCL) ||
+ ext4_test_inode_state(inode,
+ EXT4_STATE_VERITY_IN_PROGRESS)) {
+ return false;
+ }
+ }
+
+ if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
+ return false;
+
+ return true;
+}
+
static int ext4_ioctl_setflags(struct inode *inode,
unsigned int flags)
{
@@ -300,7 +332,6 @@ static int ext4_ioctl_setflags(struct inode *inode,
int err = -EPERM, migrate = 0;
struct ext4_iloc iloc;
unsigned int oldflags, mask, i;
- unsigned int jflag;
struct super_block *sb = inode->i_sb;
/* Is it quota file? Do not allow user to mess with it */
@@ -309,9 +340,6 @@ static int ext4_ioctl_setflags(struct inode *inode,
oldflags = ei->i_flags;
- /* The JOURNAL_DATA flag is modifiable only by root */
- jflag = flags & EXT4_JOURNAL_DATA_FL;
-
err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
if (err)
goto flags_out;
@@ -320,10 +348,16 @@ static int ext4_ioctl_setflags(struct inode *inode,
* The JOURNAL_DATA flag can only be changed by
* the relevant capability.
*/
- if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
+ if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
if (!capable(CAP_SYS_RESOURCE))
goto flags_out;
}
+
+ if (!dax_compatible(inode, oldflags, flags)) {
+ err = -EOPNOTSUPP;
+ goto flags_out;
+ }
+
if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
migrate = 1;
@@ -369,6 +403,8 @@ static int ext4_ioctl_setflags(struct inode *inode,
if (err)
goto flags_err;
+ ext4_dax_dontcache(inode, flags);
+
for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
if (!(mask & EXT4_FL_USER_MODIFIABLE))
continue;
@@ -381,7 +417,8 @@ static int ext4_ioctl_setflags(struct inode *inode,
ext4_clear_inode_flag(inode, i);
}
- ext4_set_inode_flags(inode);
+ ext4_set_inode_flags(inode, false);
+
inode->i_ctime = current_time(inode);
err = ext4_mark_iloc_dirty(handle, inode, &iloc);
@@ -390,17 +427,18 @@ flags_err:
if (err)
goto flags_out;
- if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
+ if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
/*
* Changes to the journaling mode can cause unsafe changes to
- * S_DAX if we are using the DAX mount option.
+ * S_DAX if the inode is DAX
*/
- if (test_opt(inode->i_sb, DAX)) {
+ if (IS_DAX(inode)) {
err = -EBUSY;
goto flags_out;
}
- err = ext4_change_inode_journal_flag(inode, jflag);
+ err = ext4_change_inode_journal_flag(inode,
+ flags & EXT4_JOURNAL_DATA_FL);
if (err)
goto flags_out;
}
@@ -527,12 +565,15 @@ static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
xflags |= FS_XFLAG_NOATIME;
if (iflags & EXT4_PROJINHERIT_FL)
xflags |= FS_XFLAG_PROJINHERIT;
+ if (iflags & EXT4_DAX_FL)
+ xflags |= FS_XFLAG_DAX;
return xflags;
}
#define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
- FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
+ FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT | \
+ FS_XFLAG_DAX)
/* Transfer xflags flags to internal */
static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
@@ -551,6 +592,8 @@ static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
iflags |= EXT4_NOATIME_FL;
if (xflags & FS_XFLAG_PROJINHERIT)
iflags |= EXT4_PROJINHERIT_FL;
+ if (xflags & FS_XFLAG_DAX)
+ iflags |= EXT4_DAX_FL;
return iflags;
}
@@ -776,12 +819,12 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
switch (cmd) {
case FS_IOC_GETFSMAP:
return ext4_ioc_getfsmap(sb, (void __user *)arg);
- case EXT4_IOC_GETFLAGS:
+ case FS_IOC_GETFLAGS:
flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
if (S_ISREG(inode->i_mode))
flags &= ~EXT4_PROJINHERIT_FL;
return put_user(flags, (int __user *) arg);
- case EXT4_IOC_SETFLAGS: {
+ case FS_IOC_SETFLAGS: {
int err;
if (!inode_owner_or_capable(inode))
@@ -1086,12 +1129,12 @@ resizefs_out:
case EXT4_IOC_PRECACHE_EXTENTS:
return ext4_ext_precache(inode);
- case EXT4_IOC_SET_ENCRYPTION_POLICY:
+ case FS_IOC_SET_ENCRYPTION_POLICY:
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
- case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
+ case FS_IOC_GET_ENCRYPTION_PWSALT: {
#ifdef CONFIG_FS_ENCRYPTION
int err, err2;
struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -1131,7 +1174,7 @@ resizefs_out:
return -EOPNOTSUPP;
#endif
}
- case EXT4_IOC_GET_ENCRYPTION_POLICY:
+ case FS_IOC_GET_ENCRYPTION_POLICY:
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
@@ -1193,7 +1236,7 @@ resizefs_out:
case EXT4_IOC_GET_ES_CACHE:
return ext4_ioctl_get_es_cache(filp, arg);
- case EXT4_IOC_FSGETXATTR:
+ case FS_IOC_FSGETXATTR:
{
struct fsxattr fa;
@@ -1204,7 +1247,7 @@ resizefs_out:
return -EFAULT;
return 0;
}
- case EXT4_IOC_FSSETXATTR:
+ case FS_IOC_FSSETXATTR:
{
struct fsxattr fa, old_fa;
int err;
@@ -1270,11 +1313,11 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
/* These are just misnamed, they actually get/put from/to user an int */
switch (cmd) {
- case EXT4_IOC32_GETFLAGS:
- cmd = EXT4_IOC_GETFLAGS;
+ case FS_IOC32_GETFLAGS:
+ cmd = FS_IOC_GETFLAGS;
break;
- case EXT4_IOC32_SETFLAGS:
- cmd = EXT4_IOC_SETFLAGS;
+ case FS_IOC32_SETFLAGS:
+ cmd = FS_IOC_SETFLAGS;
break;
case EXT4_IOC32_GETVERSION:
cmd = EXT4_IOC_GETVERSION;
@@ -1318,9 +1361,9 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case EXT4_IOC_RESIZE_FS:
case FITRIM:
case EXT4_IOC_PRECACHE_EXTENTS:
- case EXT4_IOC_SET_ENCRYPTION_POLICY:
- case EXT4_IOC_GET_ENCRYPTION_PWSALT:
- case EXT4_IOC_GET_ENCRYPTION_POLICY:
+ case FS_IOC_SET_ENCRYPTION_POLICY:
+ case FS_IOC_GET_ENCRYPTION_PWSALT:
+ case FS_IOC_GET_ENCRYPTION_POLICY:
case FS_IOC_GET_ENCRYPTION_POLICY_EX:
case FS_IOC_ADD_ENCRYPTION_KEY:
case FS_IOC_REMOVE_ENCRYPTION_KEY:
@@ -1334,8 +1377,8 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case EXT4_IOC_CLEAR_ES_CACHE:
case EXT4_IOC_GETSTATE:
case EXT4_IOC_GET_ES_CACHE:
- case EXT4_IOC_FSGETXATTR:
- case EXT4_IOC_FSSETXATTR:
+ case FS_IOC_FSGETXATTR:
+ case FS_IOC_FSSETXATTR:
break;
default:
return -ENOIOCTLCMD;
generated by cgit (git 2.34.1) at 2025-08-30 05:21:04 +0000