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-rw-r--r--fs/ubifs/Kconfig15
-rw-r--r--fs/ubifs/debug.c8
-rw-r--r--fs/ubifs/dir.c11
-rw-r--r--fs/ubifs/file.c50
-rw-r--r--fs/ubifs/lpt.c6
-rw-r--r--fs/ubifs/misc.h9
-rw-r--r--fs/ubifs/recovery.c8
-rw-r--r--fs/ubifs/super.c13
-rw-r--r--fs/ubifs/tnc.c3
-rw-r--r--fs/ubifs/ubifs.h8
-rw-r--r--fs/ubifs/xattr.c52
11 files changed, 107 insertions, 76 deletions
diff --git a/fs/ubifs/Kconfig b/fs/ubifs/Kconfig
index ba66d5080..7ff7712f2 100644
--- a/fs/ubifs/Kconfig
+++ b/fs/ubifs/Kconfig
@@ -35,3 +35,18 @@ config UBIFS_FS_ZLIB
default y
help
Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.
+
+config UBIFS_ATIME_SUPPORT
+ bool "Access time support" if UBIFS_FS
+ depends on UBIFS_FS
+ default n
+ help
+ Originally UBIFS did not support atime, because it looked like a bad idea due
+ increased flash wear. This option adds atime support and it is disabled by default
+ to preserve the old behavior. If you enable this option, UBIFS starts updating atime,
+ which means that file-system read operations will cause writes (inode atime
+ updates). This may affect file-system performance and increase flash device wear,
+ so be careful. How often atime is updated depends on the selected strategy:
+ strictatime is the "heavy", relatime is "lighter", etc.
+
+ If unsure, say 'N'
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 4c46a9865..595ca0deb 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -2573,7 +2573,7 @@ int dbg_leb_write(struct ubifs_info *c, int lnum, const void *buf,
{
int err, failing;
- if (c->dbg->pc_happened)
+ if (dbg_is_power_cut(c))
return -EROFS;
failing = power_cut_emulated(c, lnum, 1);
@@ -2595,7 +2595,7 @@ int dbg_leb_change(struct ubifs_info *c, int lnum, const void *buf,
{
int err;
- if (c->dbg->pc_happened)
+ if (dbg_is_power_cut(c))
return -EROFS;
if (power_cut_emulated(c, lnum, 1))
return -EROFS;
@@ -2611,7 +2611,7 @@ int dbg_leb_unmap(struct ubifs_info *c, int lnum)
{
int err;
- if (c->dbg->pc_happened)
+ if (dbg_is_power_cut(c))
return -EROFS;
if (power_cut_emulated(c, lnum, 0))
return -EROFS;
@@ -2627,7 +2627,7 @@ int dbg_leb_map(struct ubifs_info *c, int lnum)
{
int err;
- if (c->dbg->pc_happened)
+ if (dbg_is_power_cut(c))
return -EROFS;
if (power_cut_emulated(c, lnum, 0))
return -EROFS;
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 5c27c66c2..e49bd2808 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -449,13 +449,14 @@ static int ubifs_readdir(struct file *file, struct dir_context *ctx)
}
out:
+ kfree(file->private_data);
+ file->private_data = NULL;
+
if (err != -ENOENT) {
ubifs_err(c, "cannot find next direntry, error %d", err);
return err;
}
- kfree(file->private_data);
- file->private_data = NULL;
/* 2 is a special value indicating that there are no more direntries */
ctx->pos = 2;
return 0;
@@ -787,9 +788,6 @@ static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
dbg_gen("dent '%pd' in dir ino %lu", dentry, dir->i_ino);
- if (!new_valid_dev(rdev))
- return -EINVAL;
-
if (S_ISBLK(mode) || S_ISCHR(mode)) {
dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
if (!dev)
@@ -1188,6 +1186,9 @@ const struct inode_operations ubifs_dir_inode_operations = {
.getxattr = ubifs_getxattr,
.listxattr = ubifs_listxattr,
.removexattr = ubifs_removexattr,
+#ifdef CONFIG_UBIFS_ATIME_SUPPORT
+ .update_time = ubifs_update_time,
+#endif
};
const struct file_operations ubifs_dir_operations = {
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index a3dfe2ae7..0edc12856 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1354,6 +1354,47 @@ static inline int mctime_update_needed(const struct inode *inode,
return 0;
}
+#ifdef CONFIG_UBIFS_ATIME_SUPPORT
+/**
+ * ubifs_update_time - update time of inode.
+ * @inode: inode to update
+ *
+ * This function updates time of the inode.
+ */
+int ubifs_update_time(struct inode *inode, struct timespec *time,
+ int flags)
+{
+ struct ubifs_inode *ui = ubifs_inode(inode);
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ struct ubifs_budget_req req = { .dirtied_ino = 1,
+ .dirtied_ino_d = ALIGN(ui->data_len, 8) };
+ int iflags = I_DIRTY_TIME;
+ int err, release;
+
+ err = ubifs_budget_space(c, &req);
+ if (err)
+ return err;
+
+ mutex_lock(&ui->ui_mutex);
+ if (flags & S_ATIME)
+ inode->i_atime = *time;
+ if (flags & S_CTIME)
+ inode->i_ctime = *time;
+ if (flags & S_MTIME)
+ inode->i_mtime = *time;
+
+ if (!(inode->i_sb->s_flags & MS_LAZYTIME))
+ iflags |= I_DIRTY_SYNC;
+
+ release = ui->dirty;
+ __mark_inode_dirty(inode, iflags);
+ mutex_unlock(&ui->ui_mutex);
+ if (release)
+ ubifs_release_budget(c, &req);
+ return 0;
+}
+#endif
+
/**
* update_ctime - update mtime and ctime of an inode.
* @inode: inode to update
@@ -1537,6 +1578,9 @@ static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma)
if (err)
return err;
vma->vm_ops = &ubifs_file_vm_ops;
+#ifdef CONFIG_UBIFS_ATIME_SUPPORT
+ file_accessed(file);
+#endif
return 0;
}
@@ -1557,6 +1601,9 @@ const struct inode_operations ubifs_file_inode_operations = {
.getxattr = ubifs_getxattr,
.listxattr = ubifs_listxattr,
.removexattr = ubifs_removexattr,
+#ifdef CONFIG_UBIFS_ATIME_SUPPORT
+ .update_time = ubifs_update_time,
+#endif
};
const struct inode_operations ubifs_symlink_inode_operations = {
@@ -1568,6 +1615,9 @@ const struct inode_operations ubifs_symlink_inode_operations = {
.getxattr = ubifs_getxattr,
.listxattr = ubifs_listxattr,
.removexattr = ubifs_removexattr,
+#ifdef CONFIG_UBIFS_ATIME_SUPPORT
+ .update_time = ubifs_update_time,
+#endif
};
const struct file_operations ubifs_file_operations = {
diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index dc9f27e9d..9a517109d 100644
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -1498,11 +1498,10 @@ static struct ubifs_nnode *dirty_cow_nnode(struct ubifs_info *c,
}
/* nnode is being committed, so copy it */
- n = kmalloc(sizeof(struct ubifs_nnode), GFP_NOFS);
+ n = kmemdup(nnode, sizeof(struct ubifs_nnode), GFP_NOFS);
if (unlikely(!n))
return ERR_PTR(-ENOMEM);
- memcpy(n, nnode, sizeof(struct ubifs_nnode));
n->cnext = NULL;
__set_bit(DIRTY_CNODE, &n->flags);
__clear_bit(COW_CNODE, &n->flags);
@@ -1549,11 +1548,10 @@ static struct ubifs_pnode *dirty_cow_pnode(struct ubifs_info *c,
}
/* pnode is being committed, so copy it */
- p = kmalloc(sizeof(struct ubifs_pnode), GFP_NOFS);
+ p = kmemdup(pnode, sizeof(struct ubifs_pnode), GFP_NOFS);
if (unlikely(!p))
return ERR_PTR(-ENOMEM);
- memcpy(p, pnode, sizeof(struct ubifs_pnode));
p->cnext = NULL;
__set_bit(DIRTY_CNODE, &p->flags);
__clear_bit(COW_CNODE, &p->flags);
diff --git a/fs/ubifs/misc.h b/fs/ubifs/misc.h
index ee7cb5ebb..8ece6ca58 100644
--- a/fs/ubifs/misc.h
+++ b/fs/ubifs/misc.h
@@ -155,13 +155,8 @@ static inline int ubifs_wbuf_sync(struct ubifs_wbuf *wbuf)
*/
static inline int ubifs_encode_dev(union ubifs_dev_desc *dev, dev_t rdev)
{
- if (new_valid_dev(rdev)) {
- dev->new = cpu_to_le32(new_encode_dev(rdev));
- return sizeof(dev->new);
- } else {
- dev->huge = cpu_to_le64(huge_encode_dev(rdev));
- return sizeof(dev->huge);
- }
+ dev->new = cpu_to_le32(new_encode_dev(rdev));
+ return sizeof(dev->new);
}
/**
diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c
index 695fc71d5..586d59347 100644
--- a/fs/ubifs/recovery.c
+++ b/fs/ubifs/recovery.c
@@ -789,7 +789,7 @@ struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum,
corrupted_rescan:
/* Re-scan the corrupted data with verbose messages */
ubifs_err(c, "corruption %d", ret);
- ubifs_scan_a_node(c, buf, len, lnum, offs, 1);
+ ubifs_scan_a_node(c, buf, len, lnum, offs, 0);
corrupted:
ubifs_scanned_corruption(c, lnum, offs, buf);
err = -EUCLEAN;
@@ -1331,8 +1331,7 @@ void ubifs_destroy_size_tree(struct ubifs_info *c)
struct size_entry *e, *n;
rbtree_postorder_for_each_entry_safe(e, n, &c->size_tree, rb) {
- if (e->inode)
- iput(e->inode);
+ iput(e->inode);
kfree(e);
}
@@ -1533,8 +1532,7 @@ int ubifs_recover_size(struct ubifs_info *c)
err = fix_size_in_place(c, e);
if (err)
return err;
- if (e->inode)
- iput(e->inode);
+ iput(e->inode);
}
}
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 9547a2786..1fd90c079 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -128,7 +128,10 @@ struct inode *ubifs_iget(struct super_block *sb, unsigned long inum)
if (err)
goto out_ino;
- inode->i_flags |= (S_NOCMTIME | S_NOATIME);
+ inode->i_flags |= S_NOCMTIME;
+#ifndef CONFIG_UBIFS_ATIME_SUPPORT
+ inode->i_flags |= S_NOATIME;
+#endif
set_nlink(inode, le32_to_cpu(ino->nlink));
i_uid_write(inode, le32_to_cpu(ino->uid));
i_gid_write(inode, le32_to_cpu(ino->gid));
@@ -2037,7 +2040,6 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
if (c->max_inode_sz > MAX_LFS_FILESIZE)
sb->s_maxbytes = c->max_inode_sz = MAX_LFS_FILESIZE;
sb->s_op = &ubifs_super_operations;
- sb->s_xattr = ubifs_xattr_handlers;
mutex_lock(&c->umount_mutex);
err = mount_ubifs(c);
@@ -2139,7 +2141,12 @@ static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags,
if (err)
goto out_deact;
/* We do not support atime */
- sb->s_flags |= MS_ACTIVE | MS_NOATIME;
+ sb->s_flags |= MS_ACTIVE;
+#ifndef CONFIG_UBIFS_ATIME_SUPPORT
+ sb->s_flags |= MS_NOATIME;
+#else
+ ubifs_msg(c, "full atime support is enabled.");
+#endif
}
/* 'fill_super()' opens ubi again so we must close it here */
diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c
index 957f5757f..fa9a20cc6 100644
--- a/fs/ubifs/tnc.c
+++ b/fs/ubifs/tnc.c
@@ -198,11 +198,10 @@ static struct ubifs_znode *copy_znode(struct ubifs_info *c,
{
struct ubifs_znode *zn;
- zn = kmalloc(c->max_znode_sz, GFP_NOFS);
+ zn = kmemdup(znode, c->max_znode_sz, GFP_NOFS);
if (unlikely(!zn))
return ERR_PTR(-ENOMEM);
- memcpy(zn, znode, c->max_znode_sz);
zn->cnext = NULL;
__set_bit(DIRTY_ZNODE, &zn->flags);
__clear_bit(COW_ZNODE, &zn->flags);
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index de759022f..a5697de76 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -858,9 +858,9 @@ struct ubifs_compressor {
* @mod_dent: non-zero if the operation removes or modifies an existing
* directory entry
* @new_ino: non-zero if the operation adds a new inode
- * @new_ino_d: now much data newly created inode contains
+ * @new_ino_d: how much data newly created inode contains
* @dirtied_ino: how many inodes the operation makes dirty
- * @dirtied_ino_d: now much data dirtied inode contains
+ * @dirtied_ino_d: how much data dirtied inode contains
* @idx_growth: how much the index will supposedly grow
* @data_growth: how much new data the operation will supposedly add
* @dd_growth: how much data that makes other data dirty the operation will
@@ -1470,7 +1470,6 @@ extern spinlock_t ubifs_infos_lock;
extern atomic_long_t ubifs_clean_zn_cnt;
extern struct kmem_cache *ubifs_inode_slab;
extern const struct super_operations ubifs_super_operations;
-extern const struct xattr_handler *ubifs_xattr_handlers[];
extern const struct address_space_operations ubifs_file_address_operations;
extern const struct file_operations ubifs_file_operations;
extern const struct inode_operations ubifs_file_inode_operations;
@@ -1746,6 +1745,9 @@ int ubifs_calc_dark(const struct ubifs_info *c, int spc);
/* file.c */
int ubifs_fsync(struct file *file, loff_t start, loff_t end, int datasync);
int ubifs_setattr(struct dentry *dentry, struct iattr *attr);
+#ifdef CONFIG_UBIFS_ATIME_SUPPORT
+int ubifs_update_time(struct inode *inode, struct timespec *time, int flags);
+#endif
/* dir.c */
struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir,
diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index fd65b3f19..e8b01b721 100644
--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -200,6 +200,7 @@ static int change_xattr(struct ubifs_info *c, struct inode *host,
int err;
struct ubifs_inode *host_ui = ubifs_inode(host);
struct ubifs_inode *ui = ubifs_inode(inode);
+ void *buf = NULL;
struct ubifs_budget_req req = { .dirtied_ino = 2,
.dirtied_ino_d = ALIGN(size, 8) + ALIGN(host_ui->data_len, 8) };
@@ -208,14 +209,17 @@ static int change_xattr(struct ubifs_info *c, struct inode *host,
if (err)
return err;
- kfree(ui->data);
- ui->data = kmemdup(value, size, GFP_NOFS);
- if (!ui->data) {
+ buf = kmemdup(value, size, GFP_NOFS);
+ if (!buf) {
err = -ENOMEM;
goto out_free;
}
+ mutex_lock(&ui->ui_mutex);
+ kfree(ui->data);
+ ui->data = buf;
inode->i_size = ui->ui_size = size;
ui->data_len = size;
+ mutex_unlock(&ui->ui_mutex);
mutex_lock(&host_ui->ui_mutex);
host->i_ctime = ubifs_current_time(host);
@@ -409,6 +413,7 @@ ssize_t ubifs_getxattr(struct dentry *dentry, const char *name, void *buf,
ubifs_assert(inode->i_size == ui->data_len);
ubifs_assert(ubifs_inode(host)->xattr_size > ui->data_len);
+ mutex_lock(&ui->ui_mutex);
if (buf) {
/* If @buf is %NULL we are supposed to return the length */
if (ui->data_len > size) {
@@ -423,6 +428,7 @@ ssize_t ubifs_getxattr(struct dentry *dentry, const char *name, void *buf,
err = ui->data_len;
out_iput:
+ mutex_unlock(&ui->ui_mutex);
iput(inode);
out_unlock:
kfree(xent);
@@ -582,46 +588,6 @@ out_free:
return err;
}
-static size_t security_listxattr(struct dentry *d, char *list, size_t list_size,
- const char *name, size_t name_len, int flags)
-{
- const int prefix_len = XATTR_SECURITY_PREFIX_LEN;
- const size_t total_len = prefix_len + name_len + 1;
-
- if (list && total_len <= list_size) {
- memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
- memcpy(list + prefix_len, name, name_len);
- list[prefix_len + name_len] = '\0';
- }
-
- return total_len;
-}
-
-static int security_getxattr(struct dentry *d, const char *name, void *buffer,
- size_t size, int flags)
-{
- return ubifs_getxattr(d, name, buffer, size);
-}
-
-static int security_setxattr(struct dentry *d, const char *name,
- const void *value, size_t size, int flags,
- int handler_flags)
-{
- return ubifs_setxattr(d, name, value, size, flags);
-}
-
-static const struct xattr_handler ubifs_xattr_security_handler = {
- .prefix = XATTR_SECURITY_PREFIX,
- .list = security_listxattr,
- .get = security_getxattr,
- .set = security_setxattr,
-};
-
-const struct xattr_handler *ubifs_xattr_handlers[] = {
- &ubifs_xattr_security_handler,
- NULL,
-};
-
static int init_xattrs(struct inode *inode, const struct xattr *xattr_array,
void *fs_info)
{
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-15 20:00:26 +0000