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-rw-r--r--fs/ext4/crypto.c12
-rw-r--r--fs/ext4/ext4.h23
-rw-r--r--fs/ext4/file.c12
-rw-r--r--fs/ext4/move_extent.c11
-rw-r--r--fs/ext4/super.c47
5 files changed, 82 insertions, 23 deletions
diff --git a/fs/ext4/crypto.c b/fs/ext4/crypto.c
index 38f756248..ecb543944 100644
--- a/fs/ext4/crypto.c
+++ b/fs/ext4/crypto.c
@@ -475,13 +475,16 @@ uint32_t ext4_validate_encryption_key_size(uint32_t mode, uint32_t size)
*/
static int ext4_d_revalidate(struct dentry *dentry, unsigned int flags)
{
- struct inode *dir = d_inode(dentry->d_parent);
- struct ext4_crypt_info *ci = EXT4_I(dir)->i_crypt_info;
+ struct dentry *dir;
+ struct ext4_crypt_info *ci;
int dir_has_key, cached_with_key;
- if (!ext4_encrypted_inode(dir))
+ dir = dget_parent(dentry);
+ if (!ext4_encrypted_inode(d_inode(dir))) {
+ dput(dir);
return 0;
-
+ }
+ ci = EXT4_I(d_inode(dir))->i_crypt_info;
if (ci && ci->ci_keyring_key &&
(ci->ci_keyring_key->flags & ((1 << KEY_FLAG_INVALIDATED) |
(1 << KEY_FLAG_REVOKED) |
@@ -491,6 +494,7 @@ static int ext4_d_revalidate(struct dentry *dentry, unsigned int flags)
/* this should eventually be an flag in d_flags */
cached_with_key = dentry->d_fsdata != NULL;
dir_has_key = (ci != NULL);
+ dput(dir);
/*
* If the dentry was cached without the key, and it is a
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 157b458a6..b213449a5 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -900,6 +900,29 @@ do { \
#include "extents_status.h"
/*
+ * Lock subclasses for i_data_sem in the ext4_inode_info structure.
+ *
+ * These are needed to avoid lockdep false positives when we need to
+ * allocate blocks to the quota inode during ext4_map_blocks(), while
+ * holding i_data_sem for a normal (non-quota) inode. Since we don't
+ * do quota tracking for the quota inode, this avoids deadlock (as
+ * well as infinite recursion, since it isn't turtles all the way
+ * down...)
+ *
+ * I_DATA_SEM_NORMAL - Used for most inodes
+ * I_DATA_SEM_OTHER - Used by move_inode.c for the second normal inode
+ * where the second inode has larger inode number
+ * than the first
+ * I_DATA_SEM_QUOTA - Used for quota inodes only
+ */
+enum {
+ I_DATA_SEM_NORMAL = 0,
+ I_DATA_SEM_OTHER,
+ I_DATA_SEM_QUOTA,
+};
+
+
+/*
* fourth extended file system inode data in memory
*/
struct ext4_inode_info {
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 4cd318f31..38847f38b 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -335,7 +335,7 @@ static int ext4_file_open(struct inode * inode, struct file * filp)
struct super_block *sb = inode->i_sb;
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
struct vfsmount *mnt = filp->f_path.mnt;
- struct inode *dir = filp->f_path.dentry->d_parent->d_inode;
+ struct dentry *dir;
struct path path;
char buf[64], *cp;
int ret;
@@ -379,14 +379,18 @@ static int ext4_file_open(struct inode * inode, struct file * filp)
if (ext4_encryption_info(inode) == NULL)
return -ENOKEY;
}
- if (ext4_encrypted_inode(dir) &&
- !ext4_is_child_context_consistent_with_parent(dir, inode)) {
+
+ dir = dget_parent(file_dentry(filp));
+ if (ext4_encrypted_inode(d_inode(dir)) &&
+ !ext4_is_child_context_consistent_with_parent(d_inode(dir), inode)) {
ext4_warning(inode->i_sb,
"Inconsistent encryption contexts: %lu/%lu\n",
- (unsigned long) dir->i_ino,
+ (unsigned long) d_inode(dir)->i_ino,
(unsigned long) inode->i_ino);
+ dput(dir);
return -EPERM;
}
+ dput(dir);
/*
* Set up the jbd2_inode if we are opening the inode for
* writing and the journal is present
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 4098acc70..796ff0eaf 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -60,10 +60,10 @@ ext4_double_down_write_data_sem(struct inode *first, struct inode *second)
{
if (first < second) {
down_write(&EXT4_I(first)->i_data_sem);
- down_write_nested(&EXT4_I(second)->i_data_sem, SINGLE_DEPTH_NESTING);
+ down_write_nested(&EXT4_I(second)->i_data_sem, I_DATA_SEM_OTHER);
} else {
down_write(&EXT4_I(second)->i_data_sem);
- down_write_nested(&EXT4_I(first)->i_data_sem, SINGLE_DEPTH_NESTING);
+ down_write_nested(&EXT4_I(first)->i_data_sem, I_DATA_SEM_OTHER);
}
}
@@ -484,6 +484,13 @@ mext_check_arguments(struct inode *orig_inode,
return -EBUSY;
}
+ if (IS_NOQUOTA(orig_inode) || IS_NOQUOTA(donor_inode)) {
+ ext4_debug("ext4 move extent: The argument files should "
+ "not be quota files [ino:orig %lu, donor %lu]\n",
+ orig_inode->i_ino, donor_inode->i_ino);
+ return -EBUSY;
+ }
+
/* Ext4 move extent supports only extent based file */
if (!(ext4_test_inode_flag(orig_inode, EXT4_INODE_EXTENTS))) {
ext4_debug("ext4 move extent: orig file is not extents "
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 3ed01ec01..a76ca677f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1324,9 +1324,9 @@ static int set_qf_name(struct super_block *sb, int qtype, substring_t *args)
return -1;
}
if (ext4_has_feature_quota(sb)) {
- ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options "
- "when QUOTA feature is enabled");
- return -1;
+ ext4_msg(sb, KERN_INFO, "Journaled quota options "
+ "ignored when QUOTA feature is enabled");
+ return 1;
}
qname = match_strdup(args);
if (!qname) {
@@ -1689,10 +1689,10 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
return -1;
}
if (ext4_has_feature_quota(sb)) {
- ext4_msg(sb, KERN_ERR,
- "Cannot set journaled quota options "
+ ext4_msg(sb, KERN_INFO,
+ "Quota format mount options ignored "
"when QUOTA feature is enabled");
- return -1;
+ return 1;
}
sbi->s_jquota_fmt = m->mount_opt;
#endif
@@ -1753,11 +1753,11 @@ static int parse_options(char *options, struct super_block *sb,
#ifdef CONFIG_QUOTA
if (ext4_has_feature_quota(sb) &&
(test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) {
- ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA "
- "feature is enabled");
- return 0;
- }
- if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
+ ext4_msg(sb, KERN_INFO, "Quota feature enabled, usrquota and grpquota "
+ "mount options ignored.");
+ clear_opt(sb, USRQUOTA);
+ clear_opt(sb, GRPQUOTA);
+ } else if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
clear_opt(sb, USRQUOTA);
@@ -5021,6 +5021,20 @@ static int ext4_quota_on_mount(struct super_block *sb, int type)
EXT4_SB(sb)->s_jquota_fmt, type);
}
+static void lockdep_set_quota_inode(struct inode *inode, int subclass)
+{
+ struct ext4_inode_info *ei = EXT4_I(inode);
+
+ /* The first argument of lockdep_set_subclass has to be
+ * *exactly* the same as the argument to init_rwsem() --- in
+ * this case, in init_once() --- or lockdep gets unhappy
+ * because the name of the lock is set using the
+ * stringification of the argument to init_rwsem().
+ */
+ (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */
+ lockdep_set_subclass(&ei->i_data_sem, subclass);
+}
+
/*
* Standard function to be called on quota_on
*/
@@ -5060,8 +5074,12 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
if (err)
return err;
}
-
- return dquot_quota_on(sb, type, format_id, path);
+ lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA);
+ err = dquot_quota_on(sb, type, format_id, path);
+ if (err)
+ lockdep_set_quota_inode(path->dentry->d_inode,
+ I_DATA_SEM_NORMAL);
+ return err;
}
static int ext4_quota_enable(struct super_block *sb, int type, int format_id,
@@ -5088,8 +5106,11 @@ static int ext4_quota_enable(struct super_block *sb, int type, int format_id,
/* Don't account quota for quota files to avoid recursion */
qf_inode->i_flags |= S_NOQUOTA;
+ lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA);
err = dquot_enable(qf_inode, type, format_id, flags);
iput(qf_inode);
+ if (err)
+ lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL);
return err;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-23 22:03:04 +0000