aboutsummaryrefslogtreecommitdiff
path: root/fs
diff options
context:
space:
mode:
Diffstat (limited to 'fs')
-rw-r--r--fs/bio.c124
-rw-r--r--fs/compat.c11
-rw-r--r--fs/ecryptfs/crypto.c21
-rw-r--r--fs/ecryptfs/ecryptfs_kernel.h1
-rw-r--r--fs/ecryptfs/inode.c37
-rw-r--r--fs/ecryptfs/main.c14
-rw-r--r--fs/ecryptfs/messaging.c82
-rw-r--r--fs/ecryptfs/miscdev.c28
-rw-r--r--fs/ecryptfs/mmap.c11
-rw-r--r--fs/ecryptfs/read_write.c32
-rw-r--r--fs/ecryptfs/super.c7
-rw-r--r--fs/exec.c25
-rw-r--r--fs/ext4/extents.c18
-rw-r--r--fs/ext4/ialloc.c6
-rw-r--r--fs/gfs2/rgrp.c13
-rw-r--r--fs/jbd/commit.c2
-rw-r--r--fs/jbd/revoke.c20
-rw-r--r--fs/jbd2/commit.c3
-rw-r--r--fs/jbd2/revoke.c21
-rw-r--r--fs/proc/stat.c5
-rw-r--r--fs/romfs/internal.h4
-rw-r--r--fs/romfs/storage.c68
-rw-r--r--fs/romfs/super.c4
23 files changed, 275 insertions, 282 deletions
diff --git a/fs/bio.c b/fs/bio.c
index cd42bb882f3..7bbc98f0eda 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -175,14 +175,6 @@ struct bio_vec *bvec_alloc_bs(gfp_t gfp_mask, int nr, unsigned long *idx,
struct bio_vec *bvl;
/*
- * If 'bs' is given, lookup the pool and do the mempool alloc.
- * If not, this is a bio_kmalloc() allocation and just do a
- * kzalloc() for the exact number of vecs right away.
- */
- if (!bs)
- bvl = kmalloc(nr * sizeof(struct bio_vec), gfp_mask);
-
- /*
* see comment near bvec_array define!
*/
switch (nr) {
@@ -260,21 +252,6 @@ void bio_free(struct bio *bio, struct bio_set *bs)
mempool_free(p, bs->bio_pool);
}
-/*
- * default destructor for a bio allocated with bio_alloc_bioset()
- */
-static void bio_fs_destructor(struct bio *bio)
-{
- bio_free(bio, fs_bio_set);
-}
-
-static void bio_kmalloc_destructor(struct bio *bio)
-{
- if (bio_has_allocated_vec(bio))
- kfree(bio->bi_io_vec);
- kfree(bio);
-}
-
void bio_init(struct bio *bio)
{
memset(bio, 0, sizeof(*bio));
@@ -301,21 +278,15 @@ void bio_init(struct bio *bio)
**/
struct bio *bio_alloc_bioset(gfp_t gfp_mask, int nr_iovecs, struct bio_set *bs)
{
+ unsigned long idx = BIO_POOL_NONE;
struct bio_vec *bvl = NULL;
- struct bio *bio = NULL;
- unsigned long idx = 0;
- void *p = NULL;
-
- if (bs) {
- p = mempool_alloc(bs->bio_pool, gfp_mask);
- if (!p)
- goto err;
- bio = p + bs->front_pad;
- } else {
- bio = kmalloc(sizeof(*bio), gfp_mask);
- if (!bio)
- goto err;
- }
+ struct bio *bio;
+ void *p;
+
+ p = mempool_alloc(bs->bio_pool, gfp_mask);
+ if (unlikely(!p))
+ return NULL;
+ bio = p + bs->front_pad;
bio_init(bio);
@@ -332,22 +303,50 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, int nr_iovecs, struct bio_set *bs)
nr_iovecs = bvec_nr_vecs(idx);
}
+out_set:
bio->bi_flags |= idx << BIO_POOL_OFFSET;
bio->bi_max_vecs = nr_iovecs;
-out_set:
bio->bi_io_vec = bvl;
-
return bio;
err_free:
- if (bs)
- mempool_free(p, bs->bio_pool);
- else
- kfree(bio);
-err:
+ mempool_free(p, bs->bio_pool);
return NULL;
}
+static void bio_fs_destructor(struct bio *bio)
+{
+ bio_free(bio, fs_bio_set);
+}
+
+/**
+ * bio_alloc - allocate a new bio, memory pool backed
+ * @gfp_mask: allocation mask to use
+ * @nr_iovecs: number of iovecs
+ *
+ * Allocate a new bio with @nr_iovecs bvecs. If @gfp_mask
+ * contains __GFP_WAIT, the allocation is guaranteed to succeed.
+ *
+ * RETURNS:
+ * Pointer to new bio on success, NULL on failure.
+ */
+struct bio *bio_alloc(gfp_t gfp_mask, int nr_iovecs)
+{
+ struct bio *bio = bio_alloc_bioset(gfp_mask, nr_iovecs, fs_bio_set);
+
+ if (bio)
+ bio->bi_destructor = bio_fs_destructor;
+
+ return bio;
+}
+
+static void bio_kmalloc_destructor(struct bio *bio)
+{
+ if (bio_integrity(bio))
+ bio_integrity_free(bio);
+ kfree(bio);
+}
+
/**
* bio_alloc - allocate a bio for I/O
* @gfp_mask: the GFP_ mask given to the slab allocator
@@ -366,29 +365,20 @@ err:
* do so can cause livelocks under memory pressure.
*
**/
-struct bio *bio_alloc(gfp_t gfp_mask, int nr_iovecs)
-{
- struct bio *bio = bio_alloc_bioset(gfp_mask, nr_iovecs, fs_bio_set);
-
- if (bio)
- bio->bi_destructor = bio_fs_destructor;
-
- return bio;
-}
-
-/*
- * Like bio_alloc(), but doesn't use a mempool backing. This means that
- * it CAN fail, but while bio_alloc() can only be used for allocations
- * that have a short (finite) life span, bio_kmalloc() should be used
- * for more permanent bio allocations (like allocating some bio's for
- * initalization or setup purposes).
- */
struct bio *bio_kmalloc(gfp_t gfp_mask, int nr_iovecs)
{
- struct bio *bio = bio_alloc_bioset(gfp_mask, nr_iovecs, NULL);
+ struct bio *bio;
- if (bio)
- bio->bi_destructor = bio_kmalloc_destructor;
+ bio = kmalloc(sizeof(struct bio) + nr_iovecs * sizeof(struct bio_vec),
+ gfp_mask);
+ if (unlikely(!bio))
+ return NULL;
+
+ bio_init(bio);
+ bio->bi_flags |= BIO_POOL_NONE << BIO_POOL_OFFSET;
+ bio->bi_max_vecs = nr_iovecs;
+ bio->bi_io_vec = bio->bi_inline_vecs;
+ bio->bi_destructor = bio_kmalloc_destructor;
return bio;
}
@@ -832,7 +822,7 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
return ERR_PTR(-ENOMEM);
ret = -ENOMEM;
- bio = bio_alloc(gfp_mask, nr_pages);
+ bio = bio_kmalloc(gfp_mask, nr_pages);
if (!bio)
goto out_bmd;
@@ -956,7 +946,7 @@ static struct bio *__bio_map_user_iov(struct request_queue *q,
if (!nr_pages)
return ERR_PTR(-EINVAL);
- bio = bio_alloc(gfp_mask, nr_pages);
+ bio = bio_kmalloc(gfp_mask, nr_pages);
if (!bio)
return ERR_PTR(-ENOMEM);
@@ -1140,7 +1130,7 @@ static struct bio *__bio_map_kern(struct request_queue *q, void *data,
int offset, i;
struct bio *bio;
- bio = bio_alloc(gfp_mask, nr_pages);
+ bio = bio_kmalloc(gfp_mask, nr_pages);
if (!bio)
return ERR_PTR(-ENOMEM);
diff --git a/fs/compat.c b/fs/compat.c
index 379a399bf5c..681ed81e6be 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1476,6 +1476,7 @@ int compat_do_execve(char * filename,
struct linux_binprm *bprm;
struct file *file;
struct files_struct *displaced;
+ bool clear_in_exec;
int retval;
retval = unshare_files(&displaced);
@@ -1498,8 +1499,9 @@ int compat_do_execve(char * filename,
goto out_unlock;
retval = check_unsafe_exec(bprm);
- if (retval)
+ if (retval < 0)
goto out_unlock;
+ clear_in_exec = retval;
file = open_exec(filename);
retval = PTR_ERR(file);
@@ -1546,9 +1548,7 @@ int compat_do_execve(char * filename,
goto out;
/* execve succeeded */
- write_lock(&current->fs->lock);
current->fs->in_exec = 0;
- write_unlock(&current->fs->lock);
current->in_execve = 0;
mutex_unlock(&current->cred_exec_mutex);
acct_update_integrals(current);
@@ -1568,9 +1568,8 @@ out_file:
}
out_unmark:
- write_lock(&current->fs->lock);
- current->fs->in_exec = 0;
- write_unlock(&current->fs->lock);
+ if (clear_in_exec)
+ current->fs->in_exec = 0;
out_unlock:
current->in_execve = 0;
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 8b65f289ee0..b91851f1cda 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -483,15 +483,7 @@ int ecryptfs_encrypt_page(struct page *page)
ecryptfs_inode = page->mapping->host;
crypt_stat =
&(ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat);
- if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
- rc = ecryptfs_write_lower_page_segment(ecryptfs_inode, page,
- 0, PAGE_CACHE_SIZE);
- if (rc)
- printk(KERN_ERR "%s: Error attempting to copy "
- "page at index [%ld]\n", __func__,
- page->index);
- goto out;
- }
+ BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED));
enc_extent_page = alloc_page(GFP_USER);
if (!enc_extent_page) {
rc = -ENOMEM;
@@ -620,16 +612,7 @@ int ecryptfs_decrypt_page(struct page *page)
ecryptfs_inode = page->mapping->host;
crypt_stat =
&(ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat);
- if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
- rc = ecryptfs_read_lower_page_segment(page, page->index, 0,
- PAGE_CACHE_SIZE,
- ecryptfs_inode);
- if (rc)
- printk(KERN_ERR "%s: Error attempting to copy "
- "page at index [%ld]\n", __func__,
- page->index);
- goto out;
- }
+ BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED));
enc_extent_page = alloc_page(GFP_USER);
if (!enc_extent_page) {
rc = -ENOMEM;
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 064c5820e4e..00b30a2d546 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -269,6 +269,7 @@ struct ecryptfs_crypt_stat {
#define ECRYPTFS_ENCRYPT_FILENAMES 0x00000800
#define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00001000
#define ECRYPTFS_ENCFN_USE_FEK 0x00002000
+#define ECRYPTFS_UNLINK_SIGS 0x00004000
u32 flags;
unsigned int file_version;
size_t iv_bytes;
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 55b3145b807..93bc0f8174a 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -379,9 +379,11 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
goto out_d_drop;
}
lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent);
+ mutex_lock(&lower_dir_dentry->d_inode->i_mutex);
lower_dentry = lookup_one_len(ecryptfs_dentry->d_name.name,
lower_dir_dentry,
ecryptfs_dentry->d_name.len);
+ mutex_unlock(&lower_dir_dentry->d_inode->i_mutex);
if (IS_ERR(lower_dentry)) {
rc = PTR_ERR(lower_dentry);
printk(KERN_ERR "%s: lookup_one_len() returned [%d] on "
@@ -406,9 +408,11 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
"filename; rc = [%d]\n", __func__, rc);
goto out_d_drop;
}
+ mutex_lock(&lower_dir_dentry->d_inode->i_mutex);
lower_dentry = lookup_one_len(encrypted_and_encoded_name,
lower_dir_dentry,
encrypted_and_encoded_name_size - 1);
+ mutex_unlock(&lower_dir_dentry->d_inode->i_mutex);
if (IS_ERR(lower_dentry)) {
rc = PTR_ERR(lower_dentry);
printk(KERN_ERR "%s: lookup_one_len() returned [%d] on "
@@ -636,8 +640,9 @@ static int
ecryptfs_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
{
char *lower_buf;
+ size_t lower_bufsiz;
struct dentry *lower_dentry;
- struct ecryptfs_crypt_stat *crypt_stat;
+ struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
char *plaintext_name;
size_t plaintext_name_size;
mm_segment_t old_fs;
@@ -648,12 +653,21 @@ ecryptfs_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
rc = -EINVAL;
goto out;
}
- crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
+ mount_crypt_stat = &ecryptfs_superblock_to_private(
+ dentry->d_sb)->mount_crypt_stat;
+ /*
+ * If the lower filename is encrypted, it will result in a significantly
+ * longer name. If needed, truncate the name after decode and decrypt.
+ */
+ if (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)
+ lower_bufsiz = PATH_MAX;
+ else
+ lower_bufsiz = bufsiz;
/* Released in this function */
- lower_buf = kmalloc(bufsiz, GFP_KERNEL);
+ lower_buf = kmalloc(lower_bufsiz, GFP_KERNEL);
if (lower_buf == NULL) {
printk(KERN_ERR "%s: Out of memory whilst attempting to "
- "kmalloc [%d] bytes\n", __func__, bufsiz);
+ "kmalloc [%d] bytes\n", __func__, lower_bufsiz);
rc = -ENOMEM;
goto out;
}
@@ -661,7 +675,7 @@ ecryptfs_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
set_fs(get_ds());
rc = lower_dentry->d_inode->i_op->readlink(lower_dentry,
(char __user *)lower_buf,
- bufsiz);
+ lower_bufsiz);
set_fs(old_fs);
if (rc >= 0) {
rc = ecryptfs_decode_and_decrypt_filename(&plaintext_name,
@@ -674,7 +688,9 @@ ecryptfs_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
rc);
goto out_free_lower_buf;
}
- rc = copy_to_user(buf, plaintext_name, plaintext_name_size);
+ /* Check for bufsiz <= 0 done in sys_readlinkat() */
+ rc = copy_to_user(buf, plaintext_name,
+ min((unsigned) bufsiz, plaintext_name_size));
if (rc)
rc = -EFAULT;
else
@@ -814,6 +830,13 @@ int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
size_t num_zeros = (PAGE_CACHE_SIZE
- (new_length & ~PAGE_CACHE_MASK));
+ if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
+ rc = vmtruncate(inode, new_length);
+ if (rc)
+ goto out_free;
+ rc = vmtruncate(lower_dentry->d_inode, new_length);
+ goto out_free;
+ }
if (num_zeros) {
char *zeros_virt;
@@ -915,8 +938,6 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
}
rc = 0;
crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
- mutex_unlock(&crypt_stat->cs_mutex);
- goto out;
}
}
mutex_unlock(&crypt_stat->cs_mutex);
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index aed56c25539..ccabd5faa04 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -190,14 +190,14 @@ int ecryptfs_interpose(struct dentry *lower_dentry, struct dentry *dentry,
init_special_inode(inode, lower_inode->i_mode,
lower_inode->i_rdev);
dentry->d_op = &ecryptfs_dops;
- if (flags & ECRYPTFS_INTERPOSE_FLAG_D_ADD)
- d_add(dentry, inode);
- else
- d_instantiate(dentry, inode);
fsstack_copy_attr_all(inode, lower_inode, NULL);
/* This size will be overwritten for real files w/ headers and
* other metadata */
fsstack_copy_inode_size(inode, lower_inode);
+ if (flags & ECRYPTFS_INTERPOSE_FLAG_D_ADD)
+ d_add(dentry, inode);
+ else
+ d_instantiate(dentry, inode);
out:
return rc;
}
@@ -208,7 +208,7 @@ enum { ecryptfs_opt_sig, ecryptfs_opt_ecryptfs_sig,
ecryptfs_opt_passthrough, ecryptfs_opt_xattr_metadata,
ecryptfs_opt_encrypted_view, ecryptfs_opt_fnek_sig,
ecryptfs_opt_fn_cipher, ecryptfs_opt_fn_cipher_key_bytes,
- ecryptfs_opt_err };
+ ecryptfs_opt_unlink_sigs, ecryptfs_opt_err };
static const match_table_t tokens = {
{ecryptfs_opt_sig, "sig=%s"},
@@ -222,6 +222,7 @@ static const match_table_t tokens = {
{ecryptfs_opt_fnek_sig, "ecryptfs_fnek_sig=%s"},
{ecryptfs_opt_fn_cipher, "ecryptfs_fn_cipher=%s"},
{ecryptfs_opt_fn_cipher_key_bytes, "ecryptfs_fn_key_bytes=%u"},
+ {ecryptfs_opt_unlink_sigs, "ecryptfs_unlink_sigs"},
{ecryptfs_opt_err, NULL}
};
@@ -402,6 +403,9 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
fn_cipher_key_bytes;
fn_cipher_key_bytes_set = 1;
break;
+ case ecryptfs_opt_unlink_sigs:
+ mount_crypt_stat->flags |= ECRYPTFS_UNLINK_SIGS;
+ break;
case ecryptfs_opt_err:
default:
printk(KERN_WARNING
diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c
index 295e7fa5675..f1c17e87c5f 100644
--- a/fs/ecryptfs/messaging.c
+++ b/fs/ecryptfs/messaging.c
@@ -133,45 +133,6 @@ out:
return rc;
}
-static int
-ecryptfs_send_message_locked(char *data, int data_len, u8 msg_type,
- struct ecryptfs_msg_ctx **msg_ctx);
-
-/**
- * ecryptfs_send_raw_message
- * @msg_type: Message type
- * @daemon: Daemon struct for recipient of message
- *
- * A raw message is one that does not include an ecryptfs_message
- * struct. It simply has a type.
- *
- * Must be called with ecryptfs_daemon_hash_mux held.
- *
- * Returns zero on success; non-zero otherwise
- */
-static int ecryptfs_send_raw_message(u8 msg_type,
- struct ecryptfs_daemon *daemon)
-{
- struct ecryptfs_msg_ctx *msg_ctx;
- int rc;
-
- rc = ecryptfs_send_message_locked(NULL, 0, msg_type, &msg_ctx);
- if (rc) {
- printk(KERN_ERR "%s: Error whilst attempting to send "
- "message to ecryptfsd; rc = [%d]\n", __func__, rc);
- goto out;
- }
- /* Raw messages are logically context-free (e.g., no
- * reply is expected), so we set the state of the
- * ecryptfs_msg_ctx object to indicate that it should
- * be freed as soon as the message is sent. */
- mutex_lock(&msg_ctx->mux);
- msg_ctx->state = ECRYPTFS_MSG_CTX_STATE_NO_REPLY;
- mutex_unlock(&msg_ctx->mux);
-out:
- return rc;
-}
-
/**
* ecryptfs_spawn_daemon - Create and initialize a new daemon struct
* @daemon: Pointer to set to newly allocated daemon struct
@@ -212,49 +173,6 @@ out:
}
/**
- * ecryptfs_process_helo
- * @euid: The user ID owner of the message
- * @user_ns: The namespace in which @euid applies
- * @pid: The process ID for the userspace program that sent the
- * message
- *
- * Adds the euid and pid values to the daemon euid hash. If an euid
- * already has a daemon pid registered, the daemon will be
- * unregistered before the new daemon is put into the hash list.
- * Returns zero after adding a new daemon to the hash list;
- * non-zero otherwise.
- */
-int ecryptfs_process_helo(uid_t euid, struct user_namespace *user_ns,
- struct pid *pid)
-{
- struct ecryptfs_daemon *new_daemon;
- struct ecryptfs_daemon *old_daemon;
- int rc;
-
- mutex_lock(&ecryptfs_daemon_hash_mux);
- rc = ecryptfs_find_daemon_by_euid(&old_daemon, euid, user_ns);
- if (rc != 0) {
- printk(KERN_WARNING "Received request from user [%d] "
- "to register daemon [0x%p]; unregistering daemon "
- "[0x%p]\n", euid, pid, old_daemon->pid);
- rc = ecryptfs_send_raw_message(ECRYPTFS_MSG_QUIT, old_daemon);
- if (rc)
- printk(KERN_WARNING "Failed to send QUIT "
- "message to daemon [0x%p]; rc = [%d]\n",
- old_daemon->pid, rc);
- hlist_del(&old_daemon->euid_chain);
- kfree(old_daemon);
- }
- rc = ecryptfs_spawn_daemon(&new_daemon, euid, user_ns, pid);
- if (rc)
- printk(KERN_ERR "%s: The gods are displeased with this attempt "
- "to create a new daemon object for euid [%d]; pid "
- "[0x%p]; rc = [%d]\n", __func__, euid, pid, rc);
- mutex_unlock(&ecryptfs_daemon_hash_mux);
- return rc;
-}
-
-/**
* ecryptfs_exorcise_daemon - Destroy the daemon struct
*
* Must be called ceremoniously while in possession of
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c
index dda3c58eefc..4ec8f61ccf5 100644
--- a/fs/ecryptfs/miscdev.c
+++ b/fs/ecryptfs/miscdev.c
@@ -193,26 +193,20 @@ int ecryptfs_send_miscdev(char *data, size_t data_size,
int rc = 0;
mutex_lock(&msg_ctx->mux);
- if (data) {
- msg_ctx->msg = kmalloc((sizeof(*msg_ctx->msg) + data_size),
- GFP_KERNEL);
- if (!msg_ctx->msg) {
- rc = -ENOMEM;
- printk(KERN_ERR "%s: Out of memory whilst attempting "
- "to kmalloc(%zd, GFP_KERNEL)\n", __func__,
- (sizeof(*msg_ctx->msg) + data_size));
- goto out_unlock;
- }
- } else
- msg_ctx->msg = NULL;
+ msg_ctx->msg = kmalloc((sizeof(*msg_ctx->msg) + data_size),
+ GFP_KERNEL);
+ if (!msg_ctx->msg) {
+ rc = -ENOMEM;
+ printk(KERN_ERR "%s: Out of memory whilst attempting "
+ "to kmalloc(%zd, GFP_KERNEL)\n", __func__,
+ (sizeof(*msg_ctx->msg) + data_size));
+ goto out_unlock;
+ }
msg_ctx->msg->index = msg_ctx->index;
msg_ctx->msg->data_len = data_size;
msg_ctx->type = msg_type;
- if (data) {
- memcpy(msg_ctx->msg->data, data, data_size);
- msg_ctx->msg_size = (sizeof(*msg_ctx->msg) + data_size);
- } else
- msg_ctx->msg_size = 0;
+ memcpy(msg_ctx->msg->data, data, data_size);
+ msg_ctx->msg_size = (sizeof(*msg_ctx->msg) + data_size);
mutex_lock(&daemon->mux);
list_add_tail(&msg_ctx->daemon_out_list, &daemon->msg_ctx_out_queue);
daemon->num_queued_msg_ctx++;
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 46cec2b6979..5c6bab9786e 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -449,6 +449,7 @@ int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode)
struct ecryptfs_crypt_stat *crypt_stat;
crypt_stat = &ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat;
+ BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED));
if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
return ecryptfs_write_inode_size_to_xattr(ecryptfs_inode);
else
@@ -490,6 +491,16 @@ static int ecryptfs_write_end(struct file *file,
ecryptfs_printk(KERN_DEBUG, "Not a new file\n");
ecryptfs_printk(KERN_DEBUG, "Calling fill_zeros_to_end_of_page"
"(page w/ index = [0x%.16x], to = [%d])\n", index, to);
+ if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
+ rc = ecryptfs_write_lower_page_segment(ecryptfs_inode, page, 0,
+ to);
+ if (!rc) {
+ rc = copied;
+ fsstack_copy_inode_size(ecryptfs_inode,
+ ecryptfs_inode_to_lower(ecryptfs_inode));
+ }
+ goto out;
+ }
/* Fills in zeros if 'to' goes beyond inode size */
rc = fill_zeros_to_end_of_page(page, to);
if (rc) {
diff --git a/fs/ecryptfs/read_write.c b/fs/ecryptfs/read_write.c
index 75c2ea9fee3..a137c6ea2fe 100644
--- a/fs/ecryptfs/read_write.c
+++ b/fs/ecryptfs/read_write.c
@@ -117,13 +117,15 @@ int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset,
size_t size)
{
struct page *ecryptfs_page;
+ struct ecryptfs_crypt_stat *crypt_stat;
+ struct inode *ecryptfs_inode = ecryptfs_file->f_dentry->d_inode;
char *ecryptfs_page_virt;
- loff_t ecryptfs_file_size =
- i_size_read(ecryptfs_file->f_dentry->d_inode);
+ loff_t ecryptfs_file_size = i_size_read(ecryptfs_inode);
loff_t data_offset = 0;
loff_t pos;
int rc = 0;
+ crypt_stat = &ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat;
/*
* if we are writing beyond current size, then start pos
* at the current size - we'll fill in zeros from there.
@@ -184,7 +186,13 @@ int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset,
flush_dcache_page(ecryptfs_page);
SetPageUptodate(ecryptfs_page);
unlock_page(ecryptfs_page);
- rc = ecryptfs_encrypt_page(ecryptfs_page);
+ if (crypt_stat->flags & ECRYPTFS_ENCRYPTED)
+ rc = ecryptfs_encrypt_page(ecryptfs_page);
+ else
+ rc = ecryptfs_write_lower_page_segment(ecryptfs_inode,
+ ecryptfs_page,
+ start_offset_in_page,
+ data_offset);
page_cache_release(ecryptfs_page);
if (rc) {
printk(KERN_ERR "%s: Error encrypting "
@@ -194,14 +202,16 @@ int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset,
pos += num_bytes;
}
if ((offset + size) > ecryptfs_file_size) {
- i_size_write(ecryptfs_file->f_dentry->d_inode, (offset + size));
- rc = ecryptfs_write_inode_size_to_metadata(
- ecryptfs_file->f_dentry->d_inode);
- if (rc) {
- printk(KERN_ERR "Problem with "
- "ecryptfs_write_inode_size_to_metadata; "
- "rc = [%d]\n", rc);
- goto out;
+ i_size_write(ecryptfs_inode, (offset + size));
+ if (crypt_stat->flags & ECRYPTFS_ENCRYPTED) {
+ rc = ecryptfs_write_inode_size_to_metadata(
+ ecryptfs_inode);
+ if (rc) {
+ printk(KERN_ERR "Problem with "
+ "ecryptfs_write_inode_size_to_metadata; "
+ "rc = [%d]\n", rc);
+ goto out;
+ }
}
}
out:
diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c
index c27ac2b358a..fa4c7e7d15d 100644
--- a/fs/ecryptfs/super.c
+++ b/fs/ecryptfs/super.c
@@ -170,7 +170,10 @@ static int ecryptfs_show_options(struct seq_file *m, struct vfsmount *mnt)
list_for_each_entry(walker,
&mount_crypt_stat->global_auth_tok_list,
mount_crypt_stat_list) {
- seq_printf(m, ",ecryptfs_sig=%s", walker->sig);
+ if (walker->flags & ECRYPTFS_AUTH_TOK_FNEK)
+ seq_printf(m, ",ecryptfs_fnek_sig=%s", walker->sig);
+ else
+ seq_printf(m, ",ecryptfs_sig=%s", walker->sig);
}
mutex_unlock(&mount_crypt_stat->global_auth_tok_list_mutex);
@@ -186,6 +189,8 @@ static int ecryptfs_show_options(struct seq_file *m, struct vfsmount *mnt)
seq_printf(m, ",ecryptfs_xattr_metadata");
if (mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED)
seq_printf(m, ",ecryptfs_encrypted_view");
+ if (mount_crypt_stat->flags & ECRYPTFS_UNLINK_SIGS)
+ seq_printf(m, ",ecryptfs_unlink_sigs");
return 0;
}
diff --git a/fs/exec.c b/fs/exec.c
index 052a961e41a..a3a8ce83940 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1060,7 +1060,6 @@ EXPORT_SYMBOL(install_exec_creds);
int check_unsafe_exec(struct linux_binprm *bprm)
{
struct task_struct *p = current, *t;
- unsigned long flags;
unsigned n_fs;
int res = 0;
@@ -1068,21 +1067,22 @@ int check_unsafe_exec(struct linux_binprm *bprm)
n_fs = 1;
write_lock(&p->fs->lock);
- lock_task_sighand(p, &flags);
+ rcu_read_lock();
for (t = next_thread(p); t != p; t = next_thread(t)) {
if (t->fs == p->fs)
n_fs++;
}
+ rcu_read_unlock();
if (p->fs->users > n_fs) {
bprm->unsafe |= LSM_UNSAFE_SHARE;
} else {
- if (p->fs->in_exec)
- res = -EAGAIN;
- p->fs->in_exec = 1;
+ res = -EAGAIN;
+ if (!p->fs->in_exec) {
+ p->fs->in_exec = 1;
+ res = 1;
+ }
}
-
- unlock_task_sighand(p, &flags);
write_unlock(&p->fs->lock);
return res;
@@ -1284,6 +1284,7 @@ int do_execve(char * filename,
struct linux_binprm *bprm;
struct file *file;
struct files_struct *displaced;
+ bool clear_in_exec;
int retval;
retval = unshare_files(&displaced);
@@ -1306,8 +1307,9 @@ int do_execve(char * filename,
goto out_unlock;
retval = check_unsafe_exec(bprm);
- if (retval)
+ if (retval < 0)
goto out_unlock;
+ clear_in_exec = retval;
file = open_exec(filename);
retval = PTR_ERR(file);
@@ -1355,9 +1357,7 @@ int do_execve(char * filename,
goto out;
/* execve succeeded */
- write_lock(&current->fs->lock);
current->fs->in_exec = 0;
- write_unlock(&current->fs->lock);
current->in_execve = 0;
mutex_unlock(&current->cred_exec_mutex);
acct_update_integrals(current);
@@ -1377,9 +1377,8 @@ out_file:
}
out_unmark:
- write_lock(&current->fs->lock);
- current->fs->in_exec = 0;
- write_unlock(&current->fs->lock);
+ if (clear_in_exec)
+ current->fs->in_exec = 0;
out_unlock:
current->in_execve = 0;
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 2a1cb097976..e4033215834 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -326,11 +326,14 @@ ext4_ext_max_entries(struct inode *inode, int depth)
static int ext4_valid_extent(struct inode *inode, struct ext4_extent *ext)
{
- ext4_fsblk_t block = ext_pblock(ext);
+ ext4_fsblk_t block = ext_pblock(ext), valid_block;
int len = ext4_ext_get_actual_len(ext);
struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
- if (unlikely(block < le32_to_cpu(es->s_first_data_block) ||
- ((block + len) > ext4_blocks_count(es))))
+
+ valid_block = le32_to_cpu(es->s_first_data_block) +
+ EXT4_SB(inode->i_sb)->s_gdb_count;
+ if (unlikely(block <= valid_block ||
+ ((block + len) > ext4_blocks_count(es))))
return 0;
else
return 1;
@@ -339,10 +342,13 @@ static int ext4_valid_extent(struct inode *inode, struct ext4_extent *ext)
static int ext4_valid_extent_idx(struct inode *inode,
struct ext4_extent_idx *ext_idx)
{
- ext4_fsblk_t block = idx_pblock(ext_idx);
+ ext4_fsblk_t block = idx_pblock(ext_idx), valid_block;
struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
- if (unlikely(block < le32_to_cpu(es->s_first_data_block) ||
- (block >= ext4_blocks_count(es))))
+
+ valid_block = le32_to_cpu(es->s_first_data_block) +
+ EXT4_SB(inode->i_sb)->s_gdb_count;
+ if (unlikely(block <= valid_block ||
+ (block >= ext4_blocks_count(es))))
return 0;
else
return 1;
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 47b84e8df56..f18e0a08a6b 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -585,6 +585,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent,
fallback:
ngroups = sbi->s_groups_count;
avefreei = freei / ngroups;
+fallback_retry:
parent_group = EXT4_I(parent)->i_block_group;
for (i = 0; i < ngroups; i++) {
grp = (parent_group + i) % ngroups;
@@ -602,7 +603,7 @@ fallback:
* filesystems the above test can fail to find any blockgroups
*/
avefreei = 0;
- goto fallback;
+ goto fallback_retry;
}
return -1;
@@ -831,11 +832,12 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
ret2 = find_group_flex(sb, dir, &group);
if (ret2 == -1) {
ret2 = find_group_other(sb, dir, &group, mode);
- if (ret2 == 0 && once)
+ if (ret2 == 0 && once) {
once = 0;
printk(KERN_NOTICE "ext4: find_group_flex "
"failed, fallback succeeded dir %lu\n",
dir->i_ino);
+ }
}
goto got_group;
}
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index f03d024038e..565038243fa 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -212,8 +212,7 @@ static u32 gfs2_bitfit(const u8 *buf, const unsigned int len,
if (tmp == 0)
return BFITNOENT;
ptr--;
- bit = fls64(tmp);
- bit--; /* fls64 always adds one to the bit count */
+ bit = __ffs64(tmp);
bit /= 2; /* two bits per entry in the bitmap */
return (((const unsigned char *)ptr - buf) * GFS2_NBBY) + bit;
}
@@ -1445,10 +1444,12 @@ static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart,
u64 gfs2_alloc_block(struct gfs2_inode *ip, unsigned int *n)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+ struct buffer_head *dibh;
struct gfs2_alloc *al = ip->i_alloc;
struct gfs2_rgrpd *rgd = al->al_rgd;
u32 goal, blk;
u64 block;
+ int error;
if (rgrp_contains_block(rgd, ip->i_goal))
goal = ip->i_goal - rgd->rd_data0;
@@ -1461,7 +1462,13 @@ u64 gfs2_alloc_block(struct gfs2_inode *ip, unsigned int *n)
rgd->rd_last_alloc = blk;
block = rgd->rd_data0 + blk;
ip->i_goal = block;
-
+ error = gfs2_meta_inode_buffer(ip, &dibh);
+ if (error == 0) {
+ struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
+ gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+ di->di_goal_meta = di->di_goal_data = cpu_to_be64(ip->i_goal);
+ brelse(dibh);
+ }
gfs2_assert_withdraw(sdp, rgd->rd_free >= *n);
rgd->rd_free -= *n;
diff --git a/fs/jbd/commit.c b/fs/jbd/commit.c
index a8e8513a78a..06560c520f4 100644
--- a/fs/jbd/commit.c
+++ b/fs/jbd/commit.c
@@ -502,7 +502,7 @@ void journal_commit_transaction(journal_t *journal)
err = 0;
}
- journal_write_revoke_records(journal, commit_transaction);
+ journal_write_revoke_records(journal, commit_transaction, write_op);
/*
* If we found any dirty or locked buffers, then we should have
diff --git a/fs/jbd/revoke.c b/fs/jbd/revoke.c
index 3e9afc2a91d..da6cd9bdaab 100644
--- a/fs/jbd/revoke.c
+++ b/fs/jbd/revoke.c
@@ -86,6 +86,7 @@
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/init.h>
+#include <linux/bio.h>
#endif
#include <linux/log2.h>
@@ -118,8 +119,8 @@ struct jbd_revoke_table_s
#ifdef __KERNEL__
static void write_one_revoke_record(journal_t *, transaction_t *,
struct journal_head **, int *,
- struct jbd_revoke_record_s *);
-static void flush_descriptor(journal_t *, struct journal_head *, int);
+ struct jbd_revoke_record_s *, int);
+static void flush_descriptor(journal_t *, struct journal_head *, int, int);
#endif
/* Utility functions to maintain the revoke table */
@@ -500,7 +501,7 @@ void journal_switch_revoke_table(journal_t *journal)
* revoke hash, deleting the entries as we go.
*/
void journal_write_revoke_records(journal_t *journal,
- transaction_t *transaction)
+ transaction_t *transaction, int write_op)
{
struct journal_head *descriptor;
struct jbd_revoke_record_s *record;
@@ -524,14 +525,14 @@ void journal_write_revoke_records(journal_t *journal,
hash_list->next;
write_one_revoke_record(journal, transaction,
&descriptor, &offset,
- record);
+ record, write_op);
count++;
list_del(&record->hash);
kmem_cache_free(revoke_record_cache, record);
}
}
if (descriptor)
- flush_descriptor(journal, descriptor, offset);
+ flush_descriptor(journal, descriptor, offset, write_op);
jbd_debug(1, "Wrote %d revoke records\n", count);
}
@@ -544,7 +545,8 @@ static void write_one_revoke_record(journal_t *journal,
transaction_t *transaction,
struct journal_head **descriptorp,
int *offsetp,
- struct jbd_revoke_record_s *record)
+ struct jbd_revoke_record_s *record,
+ int write_op)
{
struct journal_head *descriptor;
int offset;
@@ -563,7 +565,7 @@ static void write_one_revoke_record(journal_t *journal,
/* Make sure we have a descriptor with space left for the record */
if (descriptor) {
if (offset == journal->j_blocksize) {
- flush_descriptor(journal, descriptor, offset);
+ flush_descriptor(journal, descriptor, offset, write_op);
descriptor = NULL;
}
}
@@ -600,7 +602,7 @@ static void write_one_revoke_record(journal_t *journal,
static void flush_descriptor(journal_t *journal,
struct journal_head *descriptor,
- int offset)
+ int offset, int write_op)
{
journal_revoke_header_t *header;
struct buffer_head *bh = jh2bh(descriptor);
@@ -615,7 +617,7 @@ static void flush_descriptor(journal_t *journal,
set_buffer_jwrite(bh);
BUFFER_TRACE(bh, "write");
set_buffer_dirty(bh);
- ll_rw_block(SWRITE, 1, &bh);
+ ll_rw_block((write_op == WRITE) ? SWRITE : SWRITE_SYNC_PLUG, 1, &bh);
}
#endif
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 073c8c3df7c..0b7d3b8226f 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -506,7 +506,8 @@ void jbd2_journal_commit_transaction(journal_t *journal)
if (err)
jbd2_journal_abort(journal, err);
- jbd2_journal_write_revoke_records(journal, commit_transaction);
+ jbd2_journal_write_revoke_records(journal, commit_transaction,
+ write_op);
jbd_debug(3, "JBD: commit phase 2\n");
diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c
index bbe6d592d8b..a360b06af2e 100644
--- a/fs/jbd2/revoke.c
+++ b/fs/jbd2/revoke.c
@@ -86,6 +86,7 @@
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/init.h>
+#include <linux/bio.h>
#endif
#include <linux/log2.h>
@@ -118,8 +119,8 @@ struct jbd2_revoke_table_s
#ifdef __KERNEL__
static void write_one_revoke_record(journal_t *, transaction_t *,
struct journal_head **, int *,
- struct jbd2_revoke_record_s *);
-static void flush_descriptor(journal_t *, struct journal_head *, int);
+ struct jbd2_revoke_record_s *, int);
+static void flush_descriptor(journal_t *, struct journal_head *, int, int);
#endif
/* Utility functions to maintain the revoke table */
@@ -499,7 +500,8 @@ void jbd2_journal_switch_revoke_table(journal_t *journal)
* revoke hash, deleting the entries as we go.
*/
void jbd2_journal_write_revoke_records(journal_t *journal,
- transaction_t *transaction)
+ transaction_t *transaction,
+ int write_op)
{
struct journal_head *descriptor;
struct jbd2_revoke_record_s *record;
@@ -523,14 +525,14 @@ void jbd2_journal_write_revoke_records(journal_t *journal,
hash_list->next;
write_one_revoke_record(journal, transaction,
&descriptor, &offset,
- record);
+ record, write_op);
count++;
list_del(&record->hash);
kmem_cache_free(jbd2_revoke_record_cache, record);
}
}
if (descriptor)
- flush_descriptor(journal, descriptor, offset);
+ flush_descriptor(journal, descriptor, offset, write_op);
jbd_debug(1, "Wrote %d revoke records\n", count);
}
@@ -543,7 +545,8 @@ static void write_one_revoke_record(journal_t *journal,
transaction_t *transaction,
struct journal_head **descriptorp,
int *offsetp,
- struct jbd2_revoke_record_s *record)
+ struct jbd2_revoke_record_s *record,
+ int write_op)
{
struct journal_head *descriptor;
int offset;
@@ -562,7 +565,7 @@ static void write_one_revoke_record(journal_t *journal,
/* Make sure we have a descriptor with space left for the record */
if (descriptor) {
if (offset == journal->j_blocksize) {
- flush_descriptor(journal, descriptor, offset);
+ flush_descriptor(journal, descriptor, offset, write_op);
descriptor = NULL;
}
}
@@ -607,7 +610,7 @@ static void write_one_revoke_record(journal_t *journal,
static void flush_descriptor(journal_t *journal,
struct journal_head *descriptor,
- int offset)
+ int offset, int write_op)
{
jbd2_journal_revoke_header_t *header;
struct buffer_head *bh = jh2bh(descriptor);
@@ -622,7 +625,7 @@ static void flush_descriptor(journal_t *journal,
set_buffer_jwrite(bh);
BUFFER_TRACE(bh, "write");
set_buffer_dirty(bh);
- ll_rw_block(SWRITE, 1, &bh);
+ ll_rw_block((write_op == WRITE) ? SWRITE : SWRITE_SYNC_PLUG, 1, &bh);
}
#endif
diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index f75efa22df5..81e4eb60972 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -18,6 +18,9 @@
#ifndef arch_irq_stat
#define arch_irq_stat() 0
#endif
+#ifndef arch_idle_time
+#define arch_idle_time(cpu) 0
+#endif
static int show_stat(struct seq_file *p, void *v)
{
@@ -40,6 +43,7 @@ static int show_stat(struct seq_file *p, void *v)
nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
system = cputime64_add(system, kstat_cpu(i).cpustat.system);
idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
+ idle = cputime64_add(idle, arch_idle_time(i));
iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
@@ -69,6 +73,7 @@ static int show_stat(struct seq_file *p, void *v)
nice = kstat_cpu(i).cpustat.nice;
system = kstat_cpu(i).cpustat.system;
idle = kstat_cpu(i).cpustat.idle;
+ idle = cputime64_add(idle, arch_idle_time(i));
iowait = kstat_cpu(i).cpustat.iowait;
irq = kstat_cpu(i).cpustat.irq;
softirq = kstat_cpu(i).cpustat.softirq;
diff --git a/fs/romfs/internal.h b/fs/romfs/internal.h
index 06044a9dc62..95217b83011 100644
--- a/fs/romfs/internal.h
+++ b/fs/romfs/internal.h
@@ -43,5 +43,5 @@ extern int romfs_dev_read(struct super_block *sb, unsigned long pos,
void *buf, size_t buflen);
extern ssize_t romfs_dev_strnlen(struct super_block *sb,
unsigned long pos, size_t maxlen);
-extern int romfs_dev_strncmp(struct super_block *sb, unsigned long pos,
- const char *str, size_t size);
+extern int romfs_dev_strcmp(struct super_block *sb, unsigned long pos,
+ const char *str, size_t size);
diff --git a/fs/romfs/storage.c b/fs/romfs/storage.c
index 7e3e1e12a08..b3208adf8e7 100644
--- a/fs/romfs/storage.c
+++ b/fs/romfs/storage.c
@@ -67,26 +67,35 @@ static ssize_t romfs_mtd_strnlen(struct super_block *sb,
* compare a string to one in a romfs image on MTD
* - return 1 if matched, 0 if differ, -ve if error
*/
-static int romfs_mtd_strncmp(struct super_block *sb, unsigned long pos,
- const char *str, size_t size)
+static int romfs_mtd_strcmp(struct super_block *sb, unsigned long pos,
+ const char *str, size_t size)
{
- u_char buf[16];
+ u_char buf[17];
size_t len, segment;
int ret;
- /* scan the string up to 16 bytes at a time */
+ /* scan the string up to 16 bytes at a time, and attempt to grab the
+ * trailing NUL whilst we're at it */
+ buf[0] = 0xff;
+
while (size > 0) {
- segment = min_t(size_t, size, 16);
+ segment = min_t(size_t, size + 1, 17);
ret = ROMFS_MTD_READ(sb, pos, segment, &len, buf);
if (ret < 0)
return ret;
+ len--;
if (memcmp(buf, str, len) != 0)
return 0;
+ buf[0] = buf[len];
size -= len;
pos += len;
str += len;
}
+ /* check the trailing NUL was */
+ if (buf[0])
+ return 0;
+
return 1;
}
#endif /* CONFIG_ROMFS_ON_MTD */
@@ -111,6 +120,7 @@ static int romfs_blk_read(struct super_block *sb, unsigned long pos,
return -EIO;
memcpy(buf, bh->b_data + offset, segment);
brelse(bh);
+ buf += segment;
buflen -= segment;
pos += segment;
}
@@ -154,28 +164,48 @@ static ssize_t romfs_blk_strnlen(struct super_block *sb,
* compare a string to one in a romfs image on a block device
* - return 1 if matched, 0 if differ, -ve if error
*/
-static int romfs_blk_strncmp(struct super_block *sb, unsigned long pos,
- const char *str, size_t size)
+static int romfs_blk_strcmp(struct super_block *sb, unsigned long pos,
+ const char *str, size_t size)
{
struct buffer_head *bh;
unsigned long offset;
size_t segment;
- bool x;
+ bool matched, terminated = false;
- /* scan the string up to 16 bytes at a time */
+ /* compare string up to a block at a time */
while (size > 0) {
offset = pos & (ROMBSIZE - 1);
segment = min_t(size_t, size, ROMBSIZE - offset);
bh = sb_bread(sb, pos >> ROMBSBITS);
if (!bh)
return -EIO;
- x = (memcmp(bh->b_data + offset, str, segment) != 0);
- brelse(bh);
- if (x)
- return 0;
+ matched = (memcmp(bh->b_data + offset, str, segment) == 0);
+
size -= segment;
pos += segment;
str += segment;
+ if (matched && size == 0 && offset + segment < ROMBSIZE) {
+ if (!bh->b_data[offset + segment])
+ terminated = true;
+ else
+ matched = false;
+ }
+ brelse(bh);
+ if (!matched)
+ return 0;
+ }
+
+ if (!terminated) {
+ /* the terminating NUL must be on the first byte of the next
+ * block */
+ BUG_ON((pos & (ROMBSIZE - 1)) != 0);
+ bh = sb_bread(sb, pos >> ROMBSBITS);
+ if (!bh)
+ return -EIO;
+ matched = !bh->b_data[0];
+ brelse(bh);
+ if (!matched)
+ return 0;
}
return 1;
@@ -234,10 +264,12 @@ ssize_t romfs_dev_strnlen(struct super_block *sb,
/*
* compare a string to one in romfs
+ * - the string to be compared to, str, may not be NUL-terminated; instead the
+ * string is of the specified size
* - return 1 if matched, 0 if differ, -ve if error
*/
-int romfs_dev_strncmp(struct super_block *sb, unsigned long pos,
- const char *str, size_t size)
+int romfs_dev_strcmp(struct super_block *sb, unsigned long pos,
+ const char *str, size_t size)
{
size_t limit;
@@ -246,16 +278,16 @@ int romfs_dev_strncmp(struct super_block *sb, unsigned long pos,
return -EIO;
if (size > ROMFS_MAXFN)
return -ENAMETOOLONG;
- if (size > limit - pos)
+ if (size + 1 > limit - pos)
return -EIO;
#ifdef CONFIG_ROMFS_ON_MTD
if (sb->s_mtd)
- return romfs_mtd_strncmp(sb, pos, str, size);
+ return romfs_mtd_strcmp(sb, pos, str, size);
#endif
#ifdef CONFIG_ROMFS_ON_BLOCK
if (sb->s_bdev)
- return romfs_blk_strncmp(sb, pos, str, size);
+ return romfs_blk_strcmp(sb, pos, str, size);
#endif
return -EIO;
}
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index 10ca7d984a8..c53b5ef8a02 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -240,8 +240,8 @@ static struct dentry *romfs_lookup(struct inode *dir, struct dentry *dentry,
goto error;
/* try to match the first 16 bytes of name */
- ret = romfs_dev_strncmp(dir->i_sb, offset + ROMFH_SIZE, name,
- len);
+ ret = romfs_dev_strcmp(dir->i_sb, offset + ROMFH_SIZE, name,
+ len);
if (ret < 0)
goto error;
if (ret == 1)
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-15 16:28:41 +0000