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-rw-r--r--fs/9p/vfs_file.c114
-rw-r--r--fs/binfmt_elf.c2
-rw-r--r--fs/nfs_common/nfsacl.c70
3 files changed, 69 insertions, 117 deletions
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index a4799e9..bbc3cc6 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -175,16 +175,16 @@ static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
}
/**
- * v9fs_read - read from a file (internal)
+ * v9fs_file_read - read from a file
* @filep: file pointer to read
* @data: data buffer to read data into
* @count: size of buffer
* @offset: offset at which to read data
*
*/
-
static ssize_t
-v9fs_read(struct file *filp, char *buffer, size_t count, loff_t * offset)
+v9fs_file_read(struct file *filp, char __user * data, size_t count,
+ loff_t * offset)
{
struct inode *inode = filp->f_dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
@@ -194,6 +194,7 @@ v9fs_read(struct file *filp, char *buffer, size_t count, loff_t * offset)
int rsize = 0;
int result = 0;
int total = 0;
+ int n;
dprintk(DEBUG_VFS, "\n");
@@ -216,10 +217,15 @@ v9fs_read(struct file *filp, char *buffer, size_t count, loff_t * offset)
} else
*offset += result;
- /* XXX - extra copy */
- memcpy(buffer, fcall->params.rread.data, result);
+ n = copy_to_user(data, fcall->params.rread.data, result);
+ if (n) {
+ dprintk(DEBUG_ERROR, "Problem copying to user %d\n", n);
+ kfree(fcall);
+ return -EFAULT;
+ }
+
count -= result;
- buffer += result;
+ data += result;
total += result;
kfree(fcall);
@@ -232,42 +238,7 @@ v9fs_read(struct file *filp, char *buffer, size_t count, loff_t * offset)
}
/**
- * v9fs_file_read - read from a file
- * @filep: file pointer to read
- * @data: data buffer to read data into
- * @count: size of buffer
- * @offset: offset at which to read data
- *
- */
-
-static ssize_t
-v9fs_file_read(struct file *filp, char __user * data, size_t count,
- loff_t * offset)
-{
- int retval = -1;
- int ret = 0;
- char *buffer;
-
- buffer = kmalloc(count, GFP_KERNEL);
- if (!buffer)
- return -ENOMEM;
-
- retval = v9fs_read(filp, buffer, count, offset);
- if (retval > 0) {
- if ((ret = copy_to_user(data, buffer, retval)) != 0) {
- dprintk(DEBUG_ERROR, "Problem copying to user %d\n",
- ret);
- retval = ret;
- }
- }
-
- kfree(buffer);
-
- return retval;
-}
-
-/**
- * v9fs_write - write to a file
+ * v9fs_file_write - write to a file
* @filep: file pointer to write
* @data: data buffer to write data from
* @count: size of buffer
@@ -276,7 +247,8 @@ v9fs_file_read(struct file *filp, char __user * data, size_t count,
*/
static ssize_t
-v9fs_write(struct file *filp, char *buffer, size_t count, loff_t * offset)
+v9fs_file_write(struct file *filp, const char __user * data,
+ size_t count, loff_t * offset)
{
struct inode *inode = filp->f_dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
@@ -286,30 +258,42 @@ v9fs_write(struct file *filp, char *buffer, size_t count, loff_t * offset)
int result = -EIO;
int rsize = 0;
int total = 0;
+ char *buf;
- dprintk(DEBUG_VFS, "data %p count %d offset %x\n", buffer, (int)count,
+ dprintk(DEBUG_VFS, "data %p count %d offset %x\n", data, (int)count,
(int)*offset);
rsize = v9ses->maxdata - V9FS_IOHDRSZ;
if (v9fid->iounit != 0 && rsize > v9fid->iounit)
rsize = v9fid->iounit;
- dump_data(buffer, count);
+ buf = kmalloc(v9ses->maxdata - V9FS_IOHDRSZ, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
do {
if (count < rsize)
rsize = count;
- result =
- v9fs_t_write(v9ses, fid, *offset, rsize, buffer, &fcall);
+ result = copy_from_user(buf, data, rsize);
+ if (result) {
+ dprintk(DEBUG_ERROR, "Problem copying from user\n");
+ kfree(buf);
+ return -EFAULT;
+ }
+
+ dump_data(buf, rsize);
+ result = v9fs_t_write(v9ses, fid, *offset, rsize, buf, &fcall);
if (result < 0) {
eprintk(KERN_ERR, "error while writing: %s(%d)\n",
FCALL_ERROR(fcall), result);
kfree(fcall);
+ kfree(buf);
return result;
} else
*offset += result;
kfree(fcall);
+ fcall = NULL;
if (result != rsize) {
eprintk(KERN_ERR,
@@ -319,46 +303,14 @@ v9fs_write(struct file *filp, char *buffer, size_t count, loff_t * offset)
}
count -= result;
- buffer += result;
+ data += result;
total += result;
} while (count);
+ kfree(buf);
return total;
}
-/**
- * v9fs_file_write - write to a file
- * @filep: file pointer to write
- * @data: data buffer to write data from
- * @count: size of buffer
- * @offset: offset at which to write data
- *
- */
-
-static ssize_t
-v9fs_file_write(struct file *filp, const char __user * data,
- size_t count, loff_t * offset)
-{
- int ret = -1;
- char *buffer;
-
- buffer = kmalloc(count, GFP_KERNEL);
- if (buffer == NULL)
- return -ENOMEM;
-
- ret = copy_from_user(buffer, data, count);
- if (ret) {
- dprintk(DEBUG_ERROR, "Problem copying from user\n");
- ret = -EFAULT;
- } else {
- ret = v9fs_write(filp, buffer, count, offset);
- }
-
- kfree(buffer);
-
- return ret;
-}
-
struct file_operations v9fs_file_operations = {
.llseek = generic_file_llseek,
.read = v9fs_file_read,
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 7976a23..d4b1557 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -905,7 +905,7 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
send_sig(SIGKILL, current, 0);
goto out_free_dentry;
}
- if (padzero(elf_bss)) {
+ if (likely(elf_bss != elf_brk) && unlikely(padzero(elf_bss))) {
send_sig(SIGSEGV, current, 0);
retval = -EFAULT; /* Nobody gets to see this, but.. */
goto out_free_dentry;
diff --git a/fs/nfs_common/nfsacl.c b/fs/nfs_common/nfsacl.c
index 251e5a1..0c2be8c 100644
--- a/fs/nfs_common/nfsacl.c
+++ b/fs/nfs_common/nfsacl.c
@@ -48,43 +48,26 @@ xdr_nfsace_encode(struct xdr_array2_desc *desc, void *elem)
(struct nfsacl_encode_desc *) desc;
u32 *p = (u32 *) elem;
- if (nfsacl_desc->count < nfsacl_desc->acl->a_count) {
- struct posix_acl_entry *entry =
- &nfsacl_desc->acl->a_entries[nfsacl_desc->count++];
+ struct posix_acl_entry *entry =
+ &nfsacl_desc->acl->a_entries[nfsacl_desc->count++];
- *p++ = htonl(entry->e_tag | nfsacl_desc->typeflag);
- switch(entry->e_tag) {
- case ACL_USER_OBJ:
- *p++ = htonl(nfsacl_desc->uid);
- break;
- case ACL_GROUP_OBJ:
- *p++ = htonl(nfsacl_desc->gid);
- break;
- case ACL_USER:
- case ACL_GROUP:
- *p++ = htonl(entry->e_id);
- break;
- default: /* Solaris depends on that! */
- *p++ = 0;
- break;
- }
- *p++ = htonl(entry->e_perm & S_IRWXO);
- } else {
- const struct posix_acl_entry *pa, *pe;
- int group_obj_perm = ACL_READ|ACL_WRITE|ACL_EXECUTE;
-
- FOREACH_ACL_ENTRY(pa, nfsacl_desc->acl, pe) {
- if (pa->e_tag == ACL_GROUP_OBJ) {
- group_obj_perm = pa->e_perm & S_IRWXO;
- break;
- }
- }
- /* fake up ACL_MASK entry */
- *p++ = htonl(ACL_MASK | nfsacl_desc->typeflag);
- *p++ = htonl(0);
- *p++ = htonl(group_obj_perm);
+ *p++ = htonl(entry->e_tag | nfsacl_desc->typeflag);
+ switch(entry->e_tag) {
+ case ACL_USER_OBJ:
+ *p++ = htonl(nfsacl_desc->uid);
+ break;
+ case ACL_GROUP_OBJ:
+ *p++ = htonl(nfsacl_desc->gid);
+ break;
+ case ACL_USER:
+ case ACL_GROUP:
+ *p++ = htonl(entry->e_id);
+ break;
+ default: /* Solaris depends on that! */
+ *p++ = 0;
+ break;
}
-
+ *p++ = htonl(entry->e_perm & S_IRWXO);
return 0;
}
@@ -105,11 +88,28 @@ nfsacl_encode(struct xdr_buf *buf, unsigned int base, struct inode *inode,
.gid = inode->i_gid,
};
int err;
+ struct posix_acl *acl2 = NULL;
if (entries > NFS_ACL_MAX_ENTRIES ||
xdr_encode_word(buf, base, entries))
return -EINVAL;
+ if (encode_entries && acl && acl->a_count == 3) {
+ /* Fake up an ACL_MASK entry. */
+ acl2 = posix_acl_alloc(4, GFP_KERNEL);
+ if (!acl2)
+ return -ENOMEM;
+ /* Insert entries in canonical order: other orders seem
+ to confuse Solaris VxFS. */
+ acl2->a_entries[0] = acl->a_entries[0]; /* ACL_USER_OBJ */
+ acl2->a_entries[1] = acl->a_entries[1]; /* ACL_GROUP_OBJ */
+ acl2->a_entries[2] = acl->a_entries[1]; /* ACL_MASK */
+ acl2->a_entries[2].e_tag = ACL_MASK;
+ acl2->a_entries[3] = acl->a_entries[2]; /* ACL_OTHER */
+ nfsacl_desc.acl = acl2;
+ }
err = xdr_encode_array2(buf, base + 4, &nfsacl_desc.desc);
+ if (acl2)
+ posix_acl_release(acl2);
if (!err)
err = 8 + nfsacl_desc.desc.elem_size *
nfsacl_desc.desc.array_len;
generated by cgit v1.1 at 2024-10-28 14:36:11 +0000