Commit 0d25971d authored by David Woodhouse's avatar David Woodhouse
parents 615191bb ca89a517
......@@ -1075,6 +1075,44 @@ config JFFS2_FS_DEBUG
If reporting bugs, please try to have available a full dump of the
messages at debug level 1 while the misbehaviour was occurring.
config JFFS2_FS_XATTR
bool "JFFS2 XATTR support"
depends on JFFS2_FS
default n
help
Extended attributes are name:value pairs associated with inodes by
the kernel or by users (see the attr(5) manual page, or visit
<http://acl.bestbits.at/> for details).
If unsure, say N.
config JFFS2_FS_POSIX_ACL
bool "JFFS2 POSIX Access Control Lists"
depends on JFFS2_FS_XATTR
default y
select FS_POSIX_ACL
help
Posix Access Control Lists (ACLs) support permissions for users and
groups beyond the owner/group/world scheme.
To learn more about Access Control Lists, visit the Posix ACLs for
Linux website <http://acl.bestbits.at/>.
If you don't know what Access Control Lists are, say N
config JFFS2_FS_SECURITY
bool "JFFS2 Security Labels"
depends on JFFS2_FS_XATTR
default y
help
Security labels support alternative access control models
implemented by security modules like SELinux. This option
enables an extended attribute handler for file security
labels in the jffs2 filesystem.
If you are not using a security module that requires using
extended attributes for file security labels, say N.
config JFFS2_FS_WRITEBUFFER
bool "JFFS2 write-buffering support"
depends on JFFS2_FS
......
......@@ -12,6 +12,9 @@ jffs2-y += symlink.o build.o erase.o background.o fs.o writev.o
jffs2-y += super.o debug.o
jffs2-$(CONFIG_JFFS2_FS_WRITEBUFFER) += wbuf.o
jffs2-$(CONFIG_JFFS2_FS_XATTR) += xattr.o xattr_trusted.o xattr_user.o
jffs2-$(CONFIG_JFFS2_FS_SECURITY) += security.o
jffs2-$(CONFIG_JFFS2_FS_POSIX_ACL) += acl.o
jffs2-$(CONFIG_JFFS2_RUBIN) += compr_rubin.o
jffs2-$(CONFIG_JFFS2_RTIME) += compr_rtime.o
jffs2-$(CONFIG_JFFS2_ZLIB) += compr_zlib.o
......
......@@ -150,3 +150,24 @@ the buffer.
Ordering constraints:
Lock wbuf_sem last, after the alloc_sem or and f->sem.
c->xattr_sem
------------
This read/write semaphore protects against concurrent access to the
xattr related objects which include stuff in superblock and ic->xref.
In read-only path, write-semaphore is too much exclusion. It's enough
by read-semaphore. But you must hold write-semaphore when updating,
creating or deleting any xattr related object.
Once xattr_sem released, there would be no assurance for the existence
of those objects. Thus, a series of processes is often required to retry,
when updating such a object is necessary under holding read semaphore.
For example, do_jffs2_getxattr() holds read-semaphore to scan xref and
xdatum at first. But it retries this process with holding write-semaphore
after release read-semaphore, if it's necessary to load name/value pair
from medium.
Ordering constraints:
Lock xattr_sem last, after the alloc_sem.
This diff is collapsed.
/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright (C) 2006 NEC Corporation
*
* Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
*/
struct jffs2_acl_entry {
jint16_t e_tag;
jint16_t e_perm;
jint32_t e_id;
};
struct jffs2_acl_entry_short {
jint16_t e_tag;
jint16_t e_perm;
};
struct jffs2_acl_header {
jint32_t a_version;
};
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
#define JFFS2_ACL_NOT_CACHED ((void *)-1)
extern int jffs2_permission(struct inode *, int, struct nameidata *);
extern int jffs2_acl_chmod(struct inode *);
extern int jffs2_init_acl(struct inode *, struct inode *);
extern void jffs2_clear_acl(struct inode *);
extern struct xattr_handler jffs2_acl_access_xattr_handler;
extern struct xattr_handler jffs2_acl_default_xattr_handler;
#else
#define jffs2_permission NULL
#define jffs2_acl_chmod(inode) (0)
#define jffs2_init_acl(inode,dir) (0)
#define jffs2_clear_acl(inode)
#endif /* CONFIG_JFFS2_FS_POSIX_ACL */
......@@ -160,6 +160,7 @@ static int jffs2_build_filesystem(struct jffs2_sb_info *c)
ic->scan_dents = NULL;
cond_resched();
}
jffs2_build_xattr_subsystem(c);
c->flags &= ~JFFS2_SB_FLAG_BUILDING;
dbg_fsbuild("FS build complete\n");
......@@ -178,6 +179,7 @@ static int jffs2_build_filesystem(struct jffs2_sb_info *c)
jffs2_free_full_dirent(fd);
}
}
jffs2_clear_xattr_subsystem(c);
}
return ret;
......
......@@ -171,6 +171,12 @@
#define dbg_memalloc(fmt, ...)
#endif
/* Watch the XATTR subsystem */
#ifdef JFFS2_DBG_XATTR_MESSAGES
#define dbg_xattr(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_xattr(fmt, ...)
#endif
/* "Sanity" checks */
void
......
......@@ -57,7 +57,12 @@ struct inode_operations jffs2_dir_inode_operations =
.rmdir = jffs2_rmdir,
.mknod = jffs2_mknod,
.rename = jffs2_rename,
.permission = jffs2_permission,
.setattr = jffs2_setattr,
.setxattr = jffs2_setxattr,
.getxattr = jffs2_getxattr,
.listxattr = jffs2_listxattr,
.removexattr = jffs2_removexattr
};
/***********************************************************************/
......@@ -209,12 +214,15 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
ret = jffs2_do_create(c, dir_f, f, ri,
dentry->d_name.name, dentry->d_name.len);
if (ret) {
make_bad_inode(inode);
iput(inode);
jffs2_free_raw_inode(ri);
return ret;
}
if (ret)
goto fail;
ret = jffs2_init_security(inode, dir_i);
if (ret)
goto fail;
ret = jffs2_init_acl(inode, dir_i);
if (ret)
goto fail;
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime));
......@@ -224,6 +232,12 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
return 0;
fail:
make_bad_inode(inode);
iput(inode);
jffs2_free_raw_inode(ri);
return ret;
}
/***********************************************************************/
......@@ -374,6 +388,18 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
up(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_init_security(inode, dir_i);
if (ret) {
jffs2_clear_inode(inode);
return ret;
}
ret = jffs2_init_acl(inode, dir_i);
if (ret) {
jffs2_clear_inode(inode);
return ret;
}
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
if (ret) {
......@@ -504,6 +530,18 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
up(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_init_security(inode, dir_i);
if (ret) {
jffs2_clear_inode(inode);
return ret;
}
ret = jffs2_init_acl(inode, dir_i);
if (ret) {
jffs2_clear_inode(inode);
return ret;
}
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
if (ret) {
......@@ -658,6 +696,18 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
up(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_init_security(inode, dir_i);
if (ret) {
jffs2_clear_inode(inode);
return ret;
}
ret = jffs2_init_acl(inode, dir_i);
if (ret) {
jffs2_clear_inode(inode);
return ret;
}
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
if (ret) {
......
......@@ -30,7 +30,6 @@ static void jffs2_erase_callback(struct erase_info *);
#endif
static void jffs2_erase_failed(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
static void jffs2_erase_succeeded(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
static void jffs2_free_all_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
static void jffs2_erase_block(struct jffs2_sb_info *c,
......@@ -283,7 +282,7 @@ static inline void jffs2_remove_node_refs_from_ino_list(struct jffs2_sb_info *c,
jffs2_del_ino_cache(c, ic);
}
static void jffs2_free_all_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb)
void jffs2_free_all_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb)
{
struct jffs2_raw_node_ref *ref;
D1(printk(KERN_DEBUG "Freeing all node refs for eraseblock offset 0x%08x\n", jeb->offset));
......@@ -373,12 +372,8 @@ static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseb
goto filebad;
}
jeb->first_node = jeb->last_node = NULL;
/* Everything else got zeroed before the erase */
jeb->free_size = c->sector_size;
jeb->used_size = 0;
jeb->dirty_size = 0;
jeb->wasted_size = 0;
} else {
struct kvec vecs[1];
......@@ -412,17 +407,13 @@ static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseb
goto filebad;
}
/* Everything else got zeroed before the erase */
jeb->free_size = c->sector_size;
marker_ref->next_in_ino = NULL;
marker_ref->next_phys = NULL;
marker_ref->flash_offset = jeb->offset | REF_NORMAL;
marker_ref->__totlen = c->cleanmarker_size;
jeb->first_node = jeb->last_node = marker_ref;
jeb->free_size = c->sector_size - c->cleanmarker_size;
jeb->used_size = c->cleanmarker_size;
jeb->dirty_size = 0;
jeb->wasted_size = 0;
jffs2_link_node_ref(c, jeb, marker_ref, c->cleanmarker_size);
}
spin_lock(&c->erase_completion_lock);
......
......@@ -54,7 +54,12 @@ const struct file_operations jffs2_file_operations =
struct inode_operations jffs2_file_inode_operations =
{
.setattr = jffs2_setattr
.permission = jffs2_permission,
.setattr = jffs2_setattr,
.setxattr = jffs2_setxattr,
.getxattr = jffs2_getxattr,
.listxattr = jffs2_listxattr,
.removexattr = jffs2_removexattr
};
struct address_space_operations jffs2_file_address_operations =
......
......@@ -184,7 +184,12 @@ static int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
int jffs2_setattr(struct dentry *dentry, struct iattr *iattr)
{
return jffs2_do_setattr(dentry->d_inode, iattr);
int rc;
rc = jffs2_do_setattr(dentry->d_inode, iattr);
if (!rc && (iattr->ia_valid & ATTR_MODE))
rc = jffs2_acl_chmod(dentry->d_inode);
return rc;
}
int jffs2_statfs(struct super_block *sb, struct kstatfs *buf)
......@@ -223,6 +228,7 @@ void jffs2_clear_inode (struct inode *inode)
D1(printk(KERN_DEBUG "jffs2_clear_inode(): ino #%lu mode %o\n", inode->i_ino, inode->i_mode));
jffs2_xattr_delete_inode(c, f->inocache);
jffs2_do_clear_inode(c, f);
}
......@@ -508,6 +514,8 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent)
}
memset(c->inocache_list, 0, INOCACHE_HASHSIZE * sizeof(struct jffs2_inode_cache *));
jffs2_init_xattr_subsystem(c);
if ((ret = jffs2_do_mount_fs(c)))
goto out_inohash;
......@@ -542,6 +550,7 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent)
else
kfree(c->blocks);
out_inohash:
jffs2_clear_xattr_subsystem(c);
kfree(c->inocache_list);
out_wbuf:
jffs2_flash_cleanup(c);
......
......@@ -125,6 +125,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
struct jffs2_eraseblock *jeb;
struct jffs2_raw_node_ref *raw;
int ret = 0, inum, nlink;
int xattr = 0;
if (down_interruptible(&c->alloc_sem))
return -EINTR;
......@@ -138,7 +139,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
the node CRCs etc. Do it now. */
/* checked_ino is protected by the alloc_sem */
if (c->checked_ino > c->highest_ino) {
if (c->checked_ino > c->highest_ino && xattr) {
printk(KERN_CRIT "Checked all inodes but still 0x%x bytes of unchecked space?\n",
c->unchecked_size);
jffs2_dbg_dump_block_lists_nolock(c);
......@@ -148,6 +149,9 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
spin_unlock(&c->erase_completion_lock);
if (!xattr)
xattr = jffs2_verify_xattr(c);
spin_lock(&c->inocache_lock);
ic = jffs2_get_ino_cache(c, c->checked_ino++);
......@@ -252,16 +256,37 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
if (!raw->next_in_ino) {
/* Inode-less node. Clean marker, snapshot or something like that */
/* FIXME: If it's something that needs to be copied, including something
we don't grok that has JFFS2_NODETYPE_RWCOMPAT_COPY, we should do so */
spin_unlock(&c->erase_completion_lock);
jffs2_mark_node_obsolete(c, raw);
if (ref_flags(raw) == REF_PRISTINE) {
/* It's an unknown node with JFFS2_FEATURE_RWCOMPAT_COPY */
jffs2_garbage_collect_pristine(c, NULL, raw);
} else {
/* Just mark it obsolete */
jffs2_mark_node_obsolete(c, raw);
}
up(&c->alloc_sem);
goto eraseit_lock;
}
ic = jffs2_raw_ref_to_ic(raw);
#ifdef CONFIG_JFFS2_FS_XATTR
/* When 'ic' refers xattr_datum/xattr_ref, this node is GCed as xattr.
* We can decide whether this node is inode or xattr by ic->class. */
if (ic->class == RAWNODE_CLASS_XATTR_DATUM
|| ic->class == RAWNODE_CLASS_XATTR_REF) {
BUG_ON(raw->next_in_ino != (void *)ic);
spin_unlock(&c->erase_completion_lock);
if (ic->class == RAWNODE_CLASS_XATTR_DATUM) {
ret = jffs2_garbage_collect_xattr_datum(c, (struct jffs2_xattr_datum *)ic);
} else {
ret = jffs2_garbage_collect_xattr_ref(c, (struct jffs2_xattr_ref *)ic);
}
goto release_sem;
}
#endif
/* We need to hold the inocache. Either the erase_completion_lock or
the inocache_lock are sufficient; we trade down since the inocache_lock
causes less contention. */
......@@ -512,15 +537,16 @@ static int jffs2_garbage_collect_pristine(struct jffs2_sb_info *c,
D1(printk(KERN_DEBUG "Going to GC REF_PRISTINE node at 0x%08x\n", ref_offset(raw)));
rawlen = ref_totlen(c, c->gcblock, raw);
alloclen = rawlen = ref_totlen(c, c->gcblock, raw);
/* Ask for a small amount of space (or the totlen if smaller) because we
don't want to force wastage of the end of a block if splitting would
work. */
ret = jffs2_reserve_space_gc(c, min_t(uint32_t, sizeof(struct jffs2_raw_inode) +
JFFS2_MIN_DATA_LEN, rawlen), &phys_ofs, &alloclen, rawlen);
/* this is not the exact summary size of it,
it is only an upper estimation */
if (ic && alloclen > sizeof(struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN)
alloclen = sizeof(struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN;
ret = jffs2_reserve_space_gc(c, alloclen, &phys_ofs, &alloclen, rawlen);
/* 'rawlen' is not the exact summary size; it is only an upper estimation */
if (ret)
return ret;
......@@ -584,9 +610,12 @@ static int jffs2_garbage_collect_pristine(struct jffs2_sb_info *c,
}
break;
default:
printk(KERN_WARNING "Unknown node type for REF_PRISTINE node at 0x%08x: 0x%04x\n",
ref_offset(raw), je16_to_cpu(node->u.nodetype));
goto bail;
/* If it's inode-less, we don't _know_ what it is. Just copy it intact */
if (ic) {
printk(KERN_WARNING "Unknown node type for REF_PRISTINE node at 0x%08x: 0x%04x\n",
ref_offset(raw), je16_to_cpu(node->u.nodetype));
goto bail;
}
}
nraw = jffs2_alloc_raw_node_ref();
......@@ -598,8 +627,6 @@ static int jffs2_garbage_collect_pristine(struct jffs2_sb_info *c,
/* OK, all the CRCs are good; this node can just be copied as-is. */
retry:
nraw->flash_offset = phys_ofs;
nraw->__totlen = rawlen;
nraw->next_phys = NULL;
ret = jffs2_flash_write(c, phys_ofs, rawlen, &retlen, (char *)node);
......@@ -611,7 +638,7 @@ static int jffs2_garbage_collect_pristine(struct jffs2_sb_info *c,
nraw->next_in_ino = NULL;
nraw->flash_offset |= REF_OBSOLETE;
jffs2_add_physical_node_ref(c, nraw);
jffs2_add_physical_node_ref(c, nraw, rawlen);
jffs2_mark_node_obsolete(c, nraw);
} else {
printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", nraw->flash_offset);
......@@ -651,17 +678,18 @@ static int jffs2_garbage_collect_pristine(struct jffs2_sb_info *c,
goto out_node;
}
nraw->flash_offset |= REF_PRISTINE;
jffs2_add_physical_node_ref(c, nraw);
/* Link into per-inode list. This is safe because of the ic
state being INO_STATE_GC. Note that if we're doing this
for an inode which is in-core, the 'nraw' pointer is then
going to be fetched from ic->nodes by our caller. */
spin_lock(&c->erase_completion_lock);
nraw->next_in_ino = ic->nodes;
ic->nodes = nraw;
spin_unlock(&c->erase_completion_lock);
jffs2_add_physical_node_ref(c, nraw, rawlen);
if (ic) {
/* Link into per-inode list. This is safe because of the ic
state being INO_STATE_GC. Note that if we're doing this
for an inode which is in-core, the 'nraw' pointer is then
going to be fetched from ic->nodes by our caller. */
spin_lock(&c->erase_completion_lock);
nraw->next_in_ino = ic->nodes;
ic->nodes = nraw;
spin_unlock(&c->erase_completion_lock);
}
jffs2_mark_node_obsolete(c, raw);
D1(printk(KERN_DEBUG "WHEEE! GC REF_PRISTINE node at 0x%08x succeeded\n", ref_offset(raw)));
......
......@@ -5,6 +5,7 @@
#include <linux/version.h>
#include <linux/rbtree.h>
#include <linux/posix_acl.h>
#include <asm/semaphore.h>
struct jffs2_inode_info {
......@@ -45,6 +46,10 @@ struct jffs2_inode_info {
struct inode vfs_inode;
#endif
#endif
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
struct posix_acl *i_acl_access;
struct posix_acl *i_acl_default;
#endif
};
#endif /* _JFFS2_FS_I */
......@@ -115,6 +115,16 @@ struct jffs2_sb_info {
struct jffs2_summary *summary; /* Summary information */
#ifdef CONFIG_JFFS2_FS_XATTR
#define XATTRINDEX_HASHSIZE (57)
uint32_t highest_xid;
struct list_head xattrindex[XATTRINDEX_HASHSIZE];
struct list_head xattr_unchecked;
struct jffs2_xattr_ref *xref_temp;
struct rw_semaphore xattr_sem;
uint32_t xdatum_mem_usage;
uint32_t xdatum_mem_threshold;
#endif
/* OS-private pointer for getting back to master superblock info */
void *os_priv;
};
......
......@@ -26,6 +26,10 @@ static kmem_cache_t *tmp_dnode_info_slab;
static kmem_cache_t *raw_node_ref_slab;
static kmem_cache_t *node_frag_slab;
static kmem_cache_t *inode_cache_slab;
#ifdef CONFIG_JFFS2_FS_XATTR
static kmem_cache_t *xattr_datum_cache;
static kmem_cache_t *xattr_ref_cache;
#endif
int __init jffs2_create_slab_caches(void)
{
......@@ -68,8 +72,24 @@ int __init jffs2_create_slab_caches(void)
inode_cache_slab = kmem_cache_create("jffs2_inode_cache",
sizeof(struct jffs2_inode_cache),
0, 0, NULL, NULL);
if (inode_cache_slab)
return 0;
if (!inode_cache_slab)
goto err;
#ifdef CONFIG_JFFS2_FS_XATTR
xattr_datum_cache = kmem_cache_create("jffs2_xattr_datum",
sizeof(struct jffs2_xattr_datum),
0, 0, NULL, NULL);
if (!xattr_datum_cache)
goto err;
xattr_ref_cache = kmem_cache_create("jffs2_xattr_ref",
sizeof(struct jffs2_xattr_ref),
0, 0, NULL, NULL);
if (!xattr_ref_cache)
goto err;
#endif
return 0;
err:
jffs2_destroy_slab_caches();
return -ENOMEM;
......@@ -91,6 +111,12 @@ void jffs2_destroy_slab_caches(void)
kmem_cache_destroy(node_frag_slab);
if(inode_cache_slab)
kmem_cache_destroy(inode_cache_slab);
#ifdef CONFIG_JFFS2_FS_XATTR
if (xattr_datum_cache)
kmem_cache_destroy(xattr_datum_cache);
if (xattr_ref_cache)
kmem_cache_destroy(xattr_ref_cache);
#endif
}
struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)
......@@ -205,3 +231,40 @@ void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
dbg_memalloc("%p\n", x);
kmem_cache_free(inode_cache_slab, x);
}
#ifdef CONFIG_JFFS2_FS_XATTR
struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
{
struct jffs2_xattr_datum *xd;
xd = kmem_cache_alloc(xattr_datum_cache, GFP_KERNEL);
dbg_memalloc("%p\n", xd);
memset(xd, 0, sizeof(struct jffs2_xattr_datum));
xd->class = RAWNODE_CLASS_XATTR_DATUM;
INIT_LIST_HEAD(&xd->xindex);
return xd;
}
void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
{
dbg_memalloc("%p\n", xd);
kmem_cache_free(xattr_datum_cache, xd);
}
struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
{
struct jffs2_xattr_ref *ref;
ref = kmem_cache_alloc(xattr_ref_cache, GFP_KERNEL);
dbg_memalloc("%p\n", ref);
memset(ref, 0, sizeof(struct jffs2_xattr_ref));
ref->class = RAWNODE_CLASS_XATTR_REF;
return ref;
}
void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref)
{
dbg_memalloc("%p\n", ref);
kmem_cache_free(xattr_ref_cache, ref);
}
#endif
......@@ -938,6 +938,7 @@ void jffs2_free_ino_caches(struct jffs2_sb_info *c)
this = c->inocache_list[i];
while (this) {
next = this->next;
jffs2_xattr_free_inode(c, this);
jffs2_free_inode_cache(this);
this = next;
}
......@@ -1045,3 +1046,149 @@ void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c)
cond_resched();
}
}
void jffs2_link_node_ref(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_node_ref *ref, uint32_t len)
{
if (!jeb->first_node)
jeb->first_node = ref;
if (jeb->last_node) {
jeb->last_node->next_phys = ref;
#ifdef TEST_TOTLEN
if (ref_offset(jeb->last_node) + jeb->last_node->__totlen != ref_offset(ref)) {
printk(KERN_CRIT "Adding new ref %p at (0x%08x-0x%08x) not immediately after previous (0x%08x-0x%08x)\n",
ref, ref_offset(ref), ref_offset(ref)+ref->__totlen,
ref_offset(jeb->last_node), ref_offset(jeb->last_node)+jeb->last_node->__totlen);
WARN_ON(1);
}
#endif
}
jeb->last_node = ref;
switch(ref_flags(ref)) {
case REF_UNCHECKED:
c->unchecked_size += len;
jeb->unchecked_size += len;
break;
case REF_NORMAL:
case REF_PRISTINE:
c->used_size += len;
jeb->used_size += len;
break;
case REF_OBSOLETE:
c->dirty_size += len;
jeb->used_size += len;
break;
}
c->free_size -= len;
jeb->free_size -= len;
ref->next_phys = NULL;
#ifdef TEST_TOTLEN
/* Set (and test) __totlen field... for now */
ref->__totlen = len;
ref_totlen(c, jeb, ref);
#endif
}
/* No locking. Do not use on a live file system */
int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
uint32_t size)
{
if (!size)
return 0;
if (size > c->sector_size - jeb->used_size) {
printk(KERN_CRIT "Dirty space 0x%x larger then used_size 0x%x (wasted 0x%x)\n",
size, jeb->used_size, jeb->wasted_size);
BUG();
}
if (jeb->last_node && ref_obsolete(jeb->last_node)) {
#ifdef TEST_TOTLEN
jeb->last_node->__totlen += size;
#endif
c->dirty_size += size;
c->free_size -= size;
jeb->dirty_size += size;
jeb->free_size -= size;
} else {
struct jffs2_raw_node_ref *ref;
ref = jffs2_alloc_raw_node_ref();
if (!ref)
return -ENOMEM;
ref->flash_offset = jeb->offset + c->sector_size - jeb->free_size;
ref->flash_offset |= REF_OBSOLETE;
ref->next_in_ino = 0;
#ifdef TEST_TOTLEN
ref->__totlen = size;
#endif
jffs2_link_node_ref(c, jeb, ref, size);
}
return 0;
}
/* Calculate totlen from surrounding nodes or eraseblock */
static inline uint32_t __ref_totlen(struct jffs2_sb_info *c,
struct jffs2_eraseblock *jeb,
struct jffs2_raw_node_ref *ref)
{
uint32_t ref_end;
if (ref->next_phys)
ref_end = ref_offset(ref->next_phys);
else {
if (!jeb)
jeb = &c->blocks[ref->flash_offset / c->sector_size];
/* Last node in block. Use free_space */
if (ref != jeb->last_node) {
printk(KERN_CRIT "ref %p @0x%08x is not jeb->last_node (%p @0x%08x)\n",
ref, ref_offset(ref), jeb->last_node, jeb->last_node?ref_offset(jeb->last_node):0);
BUG();
}
ref_end = jeb->offset + c->sector_size - jeb->free_size;
}
return ref_end - ref_offset(ref);
}
uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_node_ref *ref)
{
uint32_t ret;
#if CONFIG_JFFS2_FS_DEBUG > 0
if (jeb && jeb != &c->blocks[ref->flash_offset / c->sector_size]) {
printk(KERN_CRIT "ref_totlen called with wrong block -- at 0x%08x instead of 0x%08x; ref 0x%08x\n",
jeb->offset, c->blocks[ref->flash_offset / c->sector_size].offset, ref_offset(ref));
BUG();
}
#endif
ret = __ref_totlen(c, jeb, ref);
#ifdef TEST_TOTLEN
if (ret != ref->__totlen) {
printk(KERN_CRIT "Totlen for ref at %p (0x%08x-0x%08x) miscalculated as 0x%x instead of %x\n",
ref, ref_offset(ref), ref_offset(ref)+ref->__totlen,
ret, ref->__totlen);
if (ref->next_phys) {
printk(KERN_CRIT "next_phys %p (0x%08x-0x%08x)\n", ref->next_phys, ref_offset(ref->next_phys),
ref_offset(ref->next_phys)+ref->__totlen);
} else
printk(KERN_CRIT "No next_phys. jeb->last_node is %p\n", jeb->last_node);
printk(KERN_CRIT "jeb->wasted_size %x, dirty_size %x, used_size %x, free_size %x\n", jeb->wasted_size, jeb->dirty_size, jeb->used_size, jeb->free_size);
ret = ref->__totlen;
if (!jeb)
jeb = &c->blocks[ref->flash_offset / c->sector_size];
#if defined(JFFS2_DBG_DUMPS) || defined(JFFS2_DBG_PARANOIA_CHECKS)
__jffs2_dbg_dump_node_refs_nolock(c, jeb);
#endif
WARN_ON(1);
}
#endif /* TEST_TOTLEN */
return ret;
}
......@@ -20,6 +20,8 @@
#include <linux/jffs2.h>
#include "jffs2_fs_sb.h"
#include "jffs2_fs_i.h"
#include "xattr.h"
#include "acl.h"
#include "summary.h"
#ifdef __ECOS
......@@ -80,7 +82,10 @@ struct jffs2_raw_node_ref
word so you know when you've got there :) */
struct jffs2_raw_node_ref *next_phys;
uint32_t flash_offset;
#define TEST_TOTLEN
#ifdef TEST_TOTLEN
uint32_t __totlen; /* This may die; use ref_totlen(c, jeb, ) below */
#endif
};
/* flash_offset & 3 always has to be zero, because nodes are
......@@ -95,6 +100,11 @@ struct jffs2_raw_node_ref
#define ref_obsolete(ref) (((ref)->flash_offset & 3) == REF_OBSOLETE)
#define mark_ref_normal(ref) do { (ref)->flash_offset = ref_offset(ref) | REF_NORMAL; } while(0)
/* NB: REF_PRISTINE for an inode-less node (ref->next_in_ino == NULL) indicates
it is an unknown node of type JFFS2_NODETYPE_RWCOMPAT_COPY, so it'll get
copied. If you need to do anything different to GC inode-less nodes, then
you need to modify gc.c accordingly. */
/* For each inode in the filesystem, we need to keep a record of
nlink, because it would be a PITA to scan the whole directory tree
at read_inode() time to calculate it, and to keep sufficient information
......@@ -107,11 +117,16 @@ struct jffs2_inode_cache {
temporary lists of dirents, and later must be set to
NULL to mark the end of the raw_node_ref->next_in_ino
chain. */
u8 class; /* It's used for identification */
u8 flags;
uint16_t state;
struct jffs2_inode_cache *next;
struct jffs2_raw_node_ref *nodes;
uint32_t ino;
int nlink;
int state;
#ifdef CONFIG_JFFS2_FS_XATTR
struct jffs2_xattr_ref *xref;
#endif
};
/* Inode states for 'state' above. We need the 'GC' state to prevent
......@@ -125,6 +140,12 @@ struct jffs2_inode_cache {
#define INO_STATE_READING 5 /* In read_inode() */
#define INO_STATE_CLEARING 6 /* In clear_inode() */
#define INO_FLAGS_XATTR_CHECKED 0x01 /* has no duplicate xattr_ref */
#define RAWNODE_CLASS_INODE_CACHE 0
#define RAWNODE_CLASS_XATTR_DATUM 1
#define RAWNODE_CLASS_XATTR_REF 2
#define INOCACHE_HASHSIZE 128
/*
......@@ -203,57 +224,7 @@ static inline int jffs2_blocks_use_vmalloc(struct jffs2_sb_info *c)
return ((c->flash_size / c->sector_size) * sizeof (struct jffs2_eraseblock)) > (128 * 1024);
}
/* Calculate totlen from surrounding nodes or eraseblock */
static inline uint32_t __ref_totlen(struct jffs2_sb_info *c,
struct jffs2_eraseblock *jeb,
struct jffs2_raw_node_ref *ref)
{
uint32_t ref_end;
if (ref->next_phys)
ref_end = ref_offset(ref->next_phys);
else {
if (!jeb)
jeb = &c->blocks[ref->flash_offset / c->sector_size];
/* Last node in block. Use free_space */
BUG_ON(ref != jeb->last_node);
ref_end = jeb->offset + c->sector_size - jeb->free_size;
}
return ref_end - ref_offset(ref);
}
static inline uint32_t ref_totlen(struct jffs2_sb_info *c,
struct jffs2_eraseblock *jeb,
struct jffs2_raw_node_ref *ref)
{
uint32_t ret;
#if CONFIG_JFFS2_FS_DEBUG > 0
if (jeb && jeb != &c->blocks[ref->flash_offset / c->sector_size]) {
printk(KERN_CRIT "ref_totlen called with wrong block -- at 0x%08x instead of 0x%08x; ref 0x%08x\n",
jeb->offset, c->blocks[ref->flash_offset / c->sector_size].offset, ref_offset(ref));
BUG();
}
#endif
#if 1
ret = ref->__totlen;
#else
/* This doesn't actually work yet */
ret = __ref_totlen(c, jeb, ref);
if (ret != ref->__totlen) {
printk(KERN_CRIT "Totlen for ref at %p (0x%08x-0x%08x) miscalculated as 0x%x instead of %x\n",
ref, ref_offset(ref), ref_offset(ref)+ref->__totlen,
ret, ref->__totlen);
if (!jeb)
jeb = &c->blocks[ref->flash_offset / c->sector_size];
jffs2_dbg_dump_node_refs_nolock(c, jeb);
BUG();
}
#endif
return ret;
}
#define ref_totlen(a, b, c) __jffs2_ref_totlen((a), (b), (c))
#define ALLOC_NORMAL 0 /* Normal allocation */
#define ALLOC_DELETION 1 /* Deletion node. Best to allow it */
......@@ -335,6 +306,11 @@ void jffs2_obsolete_node_frag(struct jffs2_sb_info *c, struct jffs2_node_frag *t
int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn);
void jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size);
int jffs2_add_older_frag_to_fragtree(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_tmp_dnode_info *tn);
void jffs2_link_node_ref(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_node_ref *ref, uint32_t len);
extern uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c,
struct jffs2_eraseblock *jeb,
struct jffs2_raw_node_ref *ref);
/* nodemgmt.c */
int jffs2_thread_should_wake(struct jffs2_sb_info *c);
......@@ -342,7 +318,7 @@ int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, uint32_t *ofs
uint32_t *len, int prio, uint32_t sumsize);
int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize, uint32_t *ofs,
uint32_t *len, uint32_t sumsize);
int jffs2_add_physical_node_ref(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *new);
int jffs2_add_physical_node_ref(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *new, uint32_t len);
void jffs2_complete_reservation(struct jffs2_sb_info *c);
void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw);
......@@ -385,6 +361,12 @@ struct jffs2_node_frag *jffs2_alloc_node_frag(void);
void jffs2_free_node_frag(struct jffs2_node_frag *);
struct jffs2_inode_cache *jffs2_alloc_inode_cache(void);
void jffs2_free_inode_cache(struct jffs2_inode_cache *);
#ifdef CONFIG_JFFS2_FS_XATTR
struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void);
void jffs2_free_xattr_datum(struct jffs2_xattr_datum *);
struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void);
void jffs2_free_xattr_ref(struct jffs2_xattr_ref *);
#endif
/* gc.c */
int jffs2_garbage_collect_pass(struct jffs2_sb_info *c);
......@@ -404,12 +386,14 @@ int jffs2_fill_scan_buf(struct jffs2_sb_info *c, void *buf,
uint32_t ofs, uint32_t len);
struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t size);
/* build.c */
int jffs2_do_mount_fs(struct jffs2_sb_info *c);
/* erase.c */
void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count);
void jffs2_free_all_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
/* wbuf.c */
......
......@@ -374,7 +374,6 @@ static int jffs2_do_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, uin
* @c: superblock info
* @new: new node reference to add
* @len: length of this physical node
* @dirty: dirty flag for new node
*
* Should only be used to report nodes for which space has been allocated
* by jffs2_reserve_space.
......@@ -382,13 +381,14 @@ static int jffs2_do_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, uin
* Must be called with the alloc_sem held.
*/
int jffs2_add_physical_node_ref(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *new)
int jffs2_add_physical_node_ref(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *new, uint32_t len)
{
struct jffs2_eraseblock *jeb;
uint32_t len;
jeb = &c->blocks[new->flash_offset / c->sector_size];
len = ref_totlen(c, jeb, new);
#ifdef TEST_TOTLEN
new->__totlen = len;
#endif
D1(printk(KERN_DEBUG "jffs2_add_physical_node_ref(): Node at 0x%x(%d), size 0x%x\n", ref_offset(new), ref_flags(new), len));
#if 1
......@@ -403,21 +403,7 @@ int jffs2_add_physical_node_ref(struct jffs2_sb_info *c, struct jffs2_raw_node_r
#endif
spin_lock(&c->erase_completion_lock);
if (!jeb->first_node)
jeb->first_node = new;
if (jeb->last_node)
jeb->last_node->next_phys = new;
jeb->last_node = new;
jeb->free_size -= len;
c->free_size -= len;
if (ref_obsolete(new)) {
jeb->dirty_size += len;
c->dirty_size += len;
} else {
jeb->used_size += len;
c->used_size += len;
}
jffs2_link_node_ref(c, jeb, new, len);
if (!jeb->free_size && !jeb->dirty_size && !ISDIRTY(jeb->wasted_size)) {
/* If it lives on the dirty_list, jffs2_reserve_space will put it there */
......@@ -470,6 +456,7 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
struct jffs2_unknown_node n;
int ret, addedsize;
size_t retlen;
uint32_t freed_len;
if(!ref) {
printk(KERN_NOTICE "EEEEEK. jffs2_mark_node_obsolete called with NULL node\n");
......@@ -499,32 +486,34 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
spin_lock(&c->erase_completion_lock);
freed_len = ref_totlen(c, jeb, ref);
if (ref_flags(ref) == REF_UNCHECKED) {
D1(if (unlikely(jeb->unchecked_size < ref_totlen(c, jeb, ref))) {
D1(if (unlikely(jeb->unchecked_size < freed_len)) {
printk(KERN_NOTICE "raw unchecked node of size 0x%08x freed from erase block %d at 0x%08x, but unchecked_size was already 0x%08x\n",
ref_totlen(c, jeb, ref), blocknr, ref->flash_offset, jeb->used_size);
freed_len, blocknr, ref->flash_offset, jeb->used_size);
BUG();
})
D1(printk(KERN_DEBUG "Obsoleting previously unchecked node at 0x%08x of len %x: ", ref_offset(ref), ref_totlen(c, jeb, ref)));
jeb->unchecked_size -= ref_totlen(c, jeb, ref);
c->unchecked_size -= ref_totlen(c, jeb, ref);
D1(printk(KERN_DEBUG "Obsoleting previously unchecked node at 0x%08x of len %x: ", ref_offset(ref), freed_len));
jeb->unchecked_size -= freed_len;
c->unchecked_size -= freed_len;
} else {
D1(if (unlikely(jeb->used_size < ref_totlen(c, jeb, ref))) {
D1(if (unlikely(jeb->used_size < freed_len)) {
printk(KERN_NOTICE "raw node of size 0x%08x freed from erase block %d at 0x%08x, but used_size was already 0x%08x\n",
ref_totlen(c, jeb, ref), blocknr, ref->flash_offset, jeb->used_size);
freed_len, blocknr, ref->flash_offset, jeb->used_size);
BUG();
})
D1(printk(KERN_DEBUG "Obsoleting node at 0x%08x of len %#x: ", ref_offset(ref), ref_totlen(c, jeb, ref)));
jeb->used_size -= ref_totlen(c, jeb, ref);
c->used_size -= ref_totlen(c, jeb, ref);
D1(printk(KERN_DEBUG "Obsoleting node at 0x%08x of len %#x: ", ref_offset(ref), freed_len));
jeb->used_size -= freed_len;
c->used_size -= freed_len;
}
// Take care, that wasted size is taken into concern
if ((jeb->dirty_size || ISDIRTY(jeb->wasted_size + ref_totlen(c, jeb, ref))) && jeb != c->nextblock) {
if ((jeb->dirty_size || ISDIRTY(jeb->wasted_size + freed_len)) && jeb != c->nextblock) {
D1(printk(KERN_DEBUG "Dirtying\n"));
addedsize = ref_totlen(c, jeb, ref);
jeb->dirty_size += ref_totlen(c, jeb, ref);
c->dirty_size += ref_totlen(c, jeb, ref);
addedsize = freed_len;
jeb->dirty_size += freed_len;
c->dirty_size += freed_len;
/* Convert wasted space to dirty, if not a bad block */
if (jeb->wasted_size) {
......@@ -545,8 +534,8 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
} else {
D1(printk(KERN_DEBUG "Wasting\n"));
addedsize = 0;
jeb->wasted_size += ref_totlen(c, jeb, ref);
c->wasted_size += ref_totlen(c, jeb, ref);
jeb->wasted_size += freed_len;
c->wasted_size += freed_len;
}
ref->flash_offset = ref_offset(ref) | REF_OBSOLETE;
......@@ -634,8 +623,8 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
printk(KERN_WARNING "Short read from obsoleted node at 0x%08x: %zd\n", ref_offset(ref), retlen);
goto out_erase_sem;
}
if (PAD(je32_to_cpu(n.totlen)) != PAD(ref_totlen(c, jeb, ref))) {
printk(KERN_WARNING "Node totlen on flash (0x%08x) != totlen from node ref (0x%08x)\n", je32_to_cpu(n.totlen), ref_totlen(c, jeb, ref));
if (PAD(je32_to_cpu(n.totlen)) != PAD(freed_len)) {
printk(KERN_WARNING "Node totlen on flash (0x%08x) != totlen from node ref (0x%08x)\n", je32_to_cpu(n.totlen), freed_len);
goto out_erase_sem;
}
if (!(je16_to_cpu(n.nodetype) & JFFS2_NODE_ACCURATE)) {
......@@ -692,7 +681,9 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
spin_lock(&c->erase_completion_lock);
#ifdef TEST_TOTLEN
ref->__totlen += n->__totlen;
#endif
ref->next_phys = n->next_phys;
if (jeb->last_node == n) jeb->last_node = ref;
if (jeb->gc_node == n) {
......@@ -715,7 +706,9 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
p = p->next_phys;
if (ref_obsolete(p) && !ref->next_in_ino) {
#ifdef TEST_TOTLEN
p->__totlen += ref->__totlen;
#endif
if (jeb->last_node == ref) {
jeb->last_node = p;
}
......
......@@ -58,6 +58,10 @@ static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
f->target = NULL;
f->flags = 0;
f->usercompr = 0;
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
f->i_acl_access = JFFS2_ACL_NOT_CACHED;
f->i_acl_default = JFFS2_ACL_NOT_CACHED;
#endif
}
......
This diff is collapsed.
/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright (C) 2006 NEC Corporation
*
* Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/time.h>
#include <linux/pagemap.h>
#include <linux/highmem.h>
#include <linux/crc32.h>
#include <linux/jffs2.h>
#include <linux/xattr.h>
#include <linux/mtd/mtd.h>
#include <linux/security.h>
#include "nodelist.h"
/* ---- Initial Security Label Attachment -------------- */
int jffs2_init_security(struct inode *inode, struct inode *dir)
{
int rc;
size_t len;
void *value;
char *name;
rc = security_inode_init_security(inode, dir, &name, &value, &len);
if (rc) {
if (rc == -EOPNOTSUPP)
return 0;
return rc;
}
rc = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, value, len, 0);
kfree(name);
kfree(value);
return rc;
}
/* ---- XATTR Handler for "security.*" ----------------- */
static int jffs2_security_getxattr(struct inode *inode, const char *name,
void *buffer, size_t size)
{
if (!strcmp(name, ""))
return -EINVAL;
return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size);
}
static int jffs2_security_setxattr(struct inode *inode, const char *name, const void *buffer,
size_t size, int flags)
{
if (!strcmp(name, ""))
return -EINVAL;
return do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size, flags);
}
static size_t jffs2_security_listxattr(struct inode *inode, char *list, size_t list_size,
const char *name, size_t name_len)
{
size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1;
if (list && retlen <= list_size) {
strcpy(list, XATTR_SECURITY_PREFIX);
strcpy(list + XATTR_SECURITY_PREFIX_LEN, name);
}
return retlen;
}
struct xattr_handler jffs2_security_xattr_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.list = jffs2_security_listxattr,
.set = jffs2_security_setxattr,
.get = jffs2_security_getxattr
};
This diff is collapsed.
......@@ -18,23 +18,6 @@
#include <linux/uio.h>
#include <linux/jffs2.h>
#define DIRTY_SPACE(x) do { typeof(x) _x = (x); \
c->free_size -= _x; c->dirty_size += _x; \
jeb->free_size -= _x ; jeb->dirty_size += _x; \
}while(0)
#define USED_SPACE(x) do { typeof(x) _x = (x); \
c->free_size -= _x; c->used_size += _x; \
jeb->free_size -= _x ; jeb->used_size += _x; \
}while(0)
#define WASTED_SPACE(x) do { typeof(x) _x = (x); \
c->free_size -= _x; c->wasted_size += _x; \
jeb->free_size -= _x ; jeb->wasted_size += _x; \
}while(0)
#define UNCHECKED_SPACE(x) do { typeof(x) _x = (x); \
c->free_size -= _x; c->unchecked_size += _x; \
jeb->free_size -= _x ; jeb->unchecked_size += _x; \
}while(0)
#define BLK_STATE_ALLFF 0
#define BLK_STATE_CLEAN 1
#define BLK_STATE_PARTDIRTY 2
......@@ -45,6 +28,8 @@
#define JFFS2_SUMMARY_NOSUM_SIZE 0xffffffff
#define JFFS2_SUMMARY_INODE_SIZE (sizeof(struct jffs2_sum_inode_flash))
#define JFFS2_SUMMARY_DIRENT_SIZE(x) (sizeof(struct jffs2_sum_dirent_flash) + (x))
#define JFFS2_SUMMARY_XATTR_SIZE (sizeof(struct jffs2_sum_xattr_flash))
#define JFFS2_SUMMARY_XREF_SIZE (sizeof(struct jffs2_sum_xref_flash))
/* Summary structures used on flash */
......@@ -75,11 +60,28 @@ struct jffs2_sum_dirent_flash
uint8_t name[0]; /* dirent name */
} __attribute__((packed));
struct jffs2_sum_xattr_flash
{
jint16_t nodetype; /* == JFFS2_NODETYPE_XATR */
jint32_t xid; /* xattr identifier */
jint32_t version; /* version number */
jint32_t offset; /* offset on jeb */
jint32_t totlen; /* node length */
} __attribute__((packed));
struct jffs2_sum_xref_flash
{
jint16_t nodetype; /* == JFFS2_NODETYPE_XREF */
jint32_t offset; /* offset on jeb */
} __attribute__((packed));
union jffs2_sum_flash
{
struct jffs2_sum_unknown_flash u;
struct jffs2_sum_inode_flash i;
struct jffs2_sum_dirent_flash d;
struct jffs2_sum_xattr_flash x;
struct jffs2_sum_xref_flash r;
};
/* Summary structures used in the memory */
......@@ -114,11 +116,30 @@ struct jffs2_sum_dirent_mem
uint8_t name[0]; /* dirent name */
} __attribute__((packed));
struct jffs2_sum_xattr_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype;
jint32_t xid;
jint32_t version;
jint32_t offset;
jint32_t totlen;
} __attribute__((packed));
struct jffs2_sum_xref_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype;
jint32_t offset;
} __attribute__((packed));
union jffs2_sum_mem
{
struct jffs2_sum_unknown_mem u;
struct jffs2_sum_inode_mem i;
struct jffs2_sum_dirent_mem d;
struct jffs2_sum_xattr_mem x;
struct jffs2_sum_xref_mem r;
};
/* Summary related information stored in superblock */
......@@ -159,8 +180,11 @@ int jffs2_sum_write_sumnode(struct jffs2_sb_info *c);
int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size);
int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, uint32_t ofs);
int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, uint32_t ofs);
int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs);
int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs);
int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
uint32_t ofs, uint32_t *pseudo_random);
struct jffs2_raw_summary *summary, uint32_t sumlen,
uint32_t *pseudo_random);
#else /* SUMMARY DISABLED */
......@@ -176,6 +200,8 @@ int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb
#define jffs2_sum_add_padding_mem(a,b)
#define jffs2_sum_add_inode_mem(a,b,c)
#define jffs2_sum_add_dirent_mem(a,b,c)
#define jffs2_sum_add_xattr_mem(a,b,c)
#define jffs2_sum_add_xref_mem(a,b,c)
#define jffs2_sum_scan_sumnode(a,b,c,d) (0)
#endif /* CONFIG_JFFS2_SUMMARY */
......
......@@ -151,7 +151,10 @@ static struct super_block *jffs2_get_sb_mtd(struct file_system_type *fs_type,
sb->s_op = &jffs2_super_operations;
sb->s_flags = flags | MS_NOATIME;
sb->s_xattr = jffs2_xattr_handlers;
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
sb->s_flags |= MS_POSIXACL;
#endif
ret = jffs2_do_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
if (ret) {
......@@ -293,6 +296,7 @@ static void jffs2_put_super (struct super_block *sb)
kfree(c->blocks);
jffs2_flash_cleanup(c);
kfree(c->inocache_list);
jffs2_clear_xattr_subsystem(c);
if (c->mtd->sync)
c->mtd->sync(c->mtd);
......
......@@ -24,7 +24,12 @@ struct inode_operations jffs2_symlink_inode_operations =
{
.readlink = generic_readlink,
.follow_link = jffs2_follow_link,
.setattr = jffs2_setattr
.permission = jffs2_permission,
.setattr = jffs2_setattr,
.setxattr = jffs2_setxattr,
.getxattr = jffs2_getxattr,
.listxattr = jffs2_listxattr,
.removexattr = jffs2_removexattr
};
static void *jffs2_follow_link(struct dentry *dentry, struct nameidata *nd)
......
......@@ -312,11 +312,9 @@ static void jffs2_wbuf_recover(struct jffs2_sb_info *c)
return;
raw2->flash_offset = ofs | REF_OBSOLETE;
raw2->__totlen = ref_totlen(c, jeb, *first_raw);
raw2->next_phys = NULL;
raw2->next_in_ino = NULL;
jffs2_add_physical_node_ref(c, raw2);
jffs2_add_physical_node_ref(c, raw2, ref_totlen(c, jeb, *first_raw));
}
return;
}
......@@ -483,11 +481,11 @@ static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad)
return ret;
}
spin_lock(&c->erase_completion_lock);
/* Adjust free size of the block if we padded. */
if (pad) {
struct jffs2_eraseblock *jeb;
struct jffs2_raw_node_ref *ref;
uint32_t waste = c->wbuf_pagesize - c->wbuf_len;
jeb = &c->blocks[c->wbuf_ofs / c->sector_size];
......@@ -497,18 +495,29 @@ static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad)
/* wbuf_pagesize - wbuf_len is the amount of space that's to be
padded. If there is less free space in the block than that,
something screwed up */
if (jeb->free_size < (c->wbuf_pagesize - c->wbuf_len)) {
if (jeb->free_size < waste) {
printk(KERN_CRIT "jffs2_flush_wbuf(): Accounting error. wbuf at 0x%08x has 0x%03x bytes, 0x%03x left.\n",
c->wbuf_ofs, c->wbuf_len, c->wbuf_pagesize-c->wbuf_len);
c->wbuf_ofs, c->wbuf_len, waste);
printk(KERN_CRIT "jffs2_flush_wbuf(): But free_size for block at 0x%08x is only 0x%08x\n",
jeb->offset, jeb->free_size);
BUG();
}
jeb->free_size -= (c->wbuf_pagesize - c->wbuf_len);
c->free_size -= (c->wbuf_pagesize - c->wbuf_len);
jeb->wasted_size += (c->wbuf_pagesize - c->wbuf_len);
c->wasted_size += (c->wbuf_pagesize - c->wbuf_len);
}
ref = jffs2_alloc_raw_node_ref();
if (!ref)
return -ENOMEM;
ref->flash_offset = c->wbuf_ofs + c->wbuf_len;
ref->flash_offset |= REF_OBSOLETE;
spin_lock(&c->erase_completion_lock);
jffs2_link_node_ref(c, jeb, ref, waste);
/* FIXME: that made it count as dirty. Convert to wasted */
jeb->dirty_size -= waste;
c->dirty_size -= waste;
jeb->wasted_size += waste;
c->wasted_size += waste;
} else
spin_lock(&c->erase_completion_lock);
/* Stick any now-obsoleted blocks on the erase_pending_list */
jffs2_refile_wbuf_blocks(c);
......
......@@ -37,7 +37,6 @@ int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint
f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache;
f->inocache->state = INO_STATE_PRESENT;
jffs2_add_ino_cache(c, f->inocache);
D1(printk(KERN_DEBUG "jffs2_do_new_inode(): Assigned ino# %d\n", f->inocache->ino));
ri->ino = cpu_to_je32(f->inocache->ino);
......@@ -104,8 +103,6 @@ struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2
fn->raw = raw;
raw->flash_offset = flash_ofs;
raw->__totlen = PAD(sizeof(*ri)+datalen);
raw->next_phys = NULL;
if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(ri->version) < f->highest_version)) {
BUG_ON(!retried);
......@@ -134,7 +131,7 @@ struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2
any node we write before the original intended end of
this node */
raw->flash_offset |= REF_OBSOLETE;
jffs2_add_physical_node_ref(c, raw);
jffs2_add_physical_node_ref(c, raw, PAD(sizeof(*ri)+datalen));
jffs2_mark_node_obsolete(c, raw);
} else {
printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset);
......@@ -192,7 +189,7 @@ struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2
} else {
raw->flash_offset |= REF_NORMAL;
}
jffs2_add_physical_node_ref(c, raw);
jffs2_add_physical_node_ref(c, raw, PAD(sizeof(*ri)+datalen));
/* Link into per-inode list */
spin_lock(&c->erase_completion_lock);
......@@ -260,8 +257,6 @@ struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jff
fd->raw = raw;
raw->flash_offset = flash_ofs;
raw->__totlen = PAD(sizeof(*rd)+namelen);
raw->next_phys = NULL;
if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) {
BUG_ON(!retried);
......@@ -282,7 +277,7 @@ struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jff
if (retlen) {
raw->next_in_ino = NULL;
raw->flash_offset |= REF_OBSOLETE;
jffs2_add_physical_node_ref(c, raw);
jffs2_add_physical_node_ref(c, raw, PAD(sizeof(*rd)+namelen));
jffs2_mark_node_obsolete(c, raw);
} else {
printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset);
......@@ -328,7 +323,7 @@ struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jff
}
/* Mark the space used */
raw->flash_offset |= REF_PRISTINE;
jffs2_add_physical_node_ref(c, raw);
jffs2_add_physical_node_ref(c, raw, PAD(sizeof(*rd)+namelen));
spin_lock(&c->erase_completion_lock);
raw->next_in_ino = f->inocache->nodes;
......
This diff is collapsed.
/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright (C) 2006 NEC Corporation
*
* Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
*/
#ifndef _JFFS2_FS_XATTR_H_
#define _JFFS2_FS_XATTR_H_
#include <linux/xattr.h>
#include <linux/list.h>
#define JFFS2_XFLAGS_HOT (0x01) /* This datum is HOT */
#define JFFS2_XFLAGS_BIND (0x02) /* This datum is not reclaimed */
struct jffs2_xattr_datum
{
void *always_null;
u8 class;
u8 flags;
u16 xprefix; /* see JFFS2_XATTR_PREFIX_* */
struct jffs2_raw_node_ref *node;
struct list_head xindex; /* chained from c->xattrindex[n] */
uint32_t refcnt; /* # of xattr_ref refers this */
uint32_t xid;
uint32_t version;
uint32_t data_crc;
uint32_t hashkey;
char *xname; /* XATTR name without prefix */
uint32_t name_len; /* length of xname */
char *xvalue; /* XATTR value */
uint32_t value_len; /* length of xvalue */
};
struct jffs2_inode_cache;
struct jffs2_xattr_ref
{
void *always_null;
u8 class;
u8 flags; /* Currently unused */
u16 unused;
struct jffs2_raw_node_ref *node;
union {
struct jffs2_inode_cache *ic; /* reference to jffs2_inode_cache */
uint32_t ino; /* only used in scanning/building */
};
union {
struct jffs2_xattr_datum *xd; /* reference to jffs2_xattr_datum */
uint32_t xid; /* only used in sccanning/building */
};
struct jffs2_xattr_ref *next; /* chained from ic->xref_list */
};
#ifdef CONFIG_JFFS2_FS_XATTR
extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c);
extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c);
extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c);
extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c,
uint32_t xid, uint32_t version);
extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd);
extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref);
extern int jffs2_verify_xattr(struct jffs2_sb_info *c);
extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname,
char *buffer, size_t size);
extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname,
const char *buffer, size_t size, int flags);
extern struct xattr_handler *jffs2_xattr_handlers[];
extern struct xattr_handler jffs2_user_xattr_handler;
extern struct xattr_handler jffs2_trusted_xattr_handler;
extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t);
#define jffs2_getxattr generic_getxattr
#define jffs2_setxattr generic_setxattr
#define jffs2_removexattr generic_removexattr
#else
#define jffs2_init_xattr_subsystem(c)
#define jffs2_build_xattr_subsystem(c)
#define jffs2_clear_xattr_subsystem(c)
#define jffs2_xattr_delete_inode(c, ic)
#define jffs2_xattr_free_inode(c, ic)
#define jffs2_verify_xattr(c) (1)
#define jffs2_xattr_handlers NULL
#define jffs2_listxattr NULL
#define jffs2_getxattr NULL
#define jffs2_setxattr NULL
#define jffs2_removexattr NULL
#endif /* CONFIG_JFFS2_FS_XATTR */
#ifdef CONFIG_JFFS2_FS_SECURITY
extern int jffs2_init_security(struct inode *inode, struct inode *dir);
extern struct xattr_handler jffs2_security_xattr_handler;
#else
#define jffs2_init_security(inode,dir) (0)
#endif /* CONFIG_JFFS2_FS_SECURITY */
#endif /* _JFFS2_FS_XATTR_H_ */
/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright (C) 2006 NEC Corporation
*
* Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
*/
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/jffs2.h>
#include <linux/xattr.h>
#include <linux/mtd/mtd.h>
#include "nodelist.h"
static int jffs2_trusted_getxattr(struct inode *inode, const char *name,
void *buffer, size_t size)
{
if (!strcmp(name, ""))
return -EINVAL;
return do_jffs2_getxattr(inode, JFFS2_XPREFIX_TRUSTED, name, buffer, size);
}
static int jffs2_trusted_setxattr(struct inode *inode, const char *name, const void *buffer,
size_t size, int flags)
{
if (!strcmp(name, ""))
return -EINVAL;
return do_jffs2_setxattr(inode, JFFS2_XPREFIX_TRUSTED, name, buffer, size, flags);
}
static size_t jffs2_trusted_listxattr(struct inode *inode, char *list, size_t list_size,
const char *name, size_t name_len)
{
size_t retlen = XATTR_TRUSTED_PREFIX_LEN + name_len + 1;
if (list && retlen<=list_size) {
strcpy(list, XATTR_TRUSTED_PREFIX);
strcpy(list + XATTR_TRUSTED_PREFIX_LEN, name);
}
return retlen;
}
struct xattr_handler jffs2_trusted_xattr_handler = {
.prefix = XATTR_TRUSTED_PREFIX,
.list = jffs2_trusted_listxattr,
.set = jffs2_trusted_setxattr,
.get = jffs2_trusted_getxattr
};
/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright (C) 2006 NEC Corporation
*
* Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
*/
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/jffs2.h>
#include <linux/xattr.h>
#include <linux/mtd/mtd.h>
#include "nodelist.h"
static int jffs2_user_getxattr(struct inode *inode, const char *name,
void *buffer, size_t size)
{
if (!strcmp(name, ""))
return -EINVAL;
return do_jffs2_getxattr(inode, JFFS2_XPREFIX_USER, name, buffer, size);
}
static int jffs2_user_setxattr(struct inode *inode, const char *name, const void *buffer,
size_t size, int flags)
{
if (!strcmp(name, ""))
return -EINVAL;
return do_jffs2_setxattr(inode, JFFS2_XPREFIX_USER, name, buffer, size, flags);
}
static size_t jffs2_user_listxattr(struct inode *inode, char *list, size_t list_size,
const char *name, size_t name_len)
{
size_t retlen = XATTR_USER_PREFIX_LEN + name_len + 1;
if (list && retlen <= list_size) {
strcpy(list, XATTR_USER_PREFIX);
strcpy(list + XATTR_USER_PREFIX_LEN, name);
}
return retlen;
}
struct xattr_handler jffs2_user_xattr_handler = {
.prefix = XATTR_USER_PREFIX,
.list = jffs2_user_listxattr,
.set = jffs2_user_setxattr,
.get = jffs2_user_getxattr
};
......@@ -65,6 +65,18 @@
#define JFFS2_NODETYPE_SUMMARY (JFFS2_FEATURE_RWCOMPAT_DELETE | JFFS2_NODE_ACCURATE | 6)
#define JFFS2_NODETYPE_XATTR (JFFS2_FEATURE_INCOMPAT | JFFS2_NODE_ACCURATE | 8)
#define JFFS2_NODETYPE_XREF (JFFS2_FEATURE_INCOMPAT | JFFS2_NODE_ACCURATE | 9)
/* XATTR Related */
#define JFFS2_XPREFIX_USER 1 /* for "user." */
#define JFFS2_XPREFIX_SECURITY 2 /* for "security." */
#define JFFS2_XPREFIX_ACL_ACCESS 3 /* for "system.posix_acl_access" */
#define JFFS2_XPREFIX_ACL_DEFAULT 4 /* for "system.posix_acl_default" */
#define JFFS2_XPREFIX_TRUSTED 5 /* for "trusted.*" */
#define JFFS2_ACL_VERSION 0x0001
// Maybe later...
//#define JFFS2_NODETYPE_CHECKPOINT (JFFS2_FEATURE_RWCOMPAT_DELETE | JFFS2_NODE_ACCURATE | 3)
//#define JFFS2_NODETYPE_OPTIONS (JFFS2_FEATURE_RWCOMPAT_COPY | JFFS2_NODE_ACCURATE | 4)
......@@ -151,6 +163,32 @@ struct jffs2_raw_inode
uint8_t data[0];
};
struct jffs2_raw_xattr {
jint16_t magic;
jint16_t nodetype; /* = JFFS2_NODETYPE_XATTR */
jint32_t totlen;
jint32_t hdr_crc;
jint32_t xid; /* XATTR identifier number */
jint32_t version;
uint8_t xprefix;
uint8_t name_len;
jint16_t value_len;
jint32_t data_crc;
jint32_t node_crc;
uint8_t data[0];
} __attribute__((packed));
struct jffs2_raw_xref
{
jint16_t magic;
jint16_t nodetype; /* = JFFS2_NODETYPE_XREF */
jint32_t totlen;
jint32_t hdr_crc;
jint32_t ino; /* inode number */
jint32_t xid; /* XATTR identifier number */
jint32_t node_crc;
} __attribute__((packed));
struct jffs2_raw_summary
{
jint16_t magic;
......@@ -169,6 +207,8 @@ union jffs2_node_union
{
struct jffs2_raw_inode i;
struct jffs2_raw_dirent d;
struct jffs2_raw_xattr x;
struct jffs2_raw_xref r;
struct jffs2_raw_summary s;
struct jffs2_unknown_node u;
};
......
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