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-rw-r--r--fs/Kconfig1
-rw-r--r--fs/binfmt_elf.c2
-rw-r--r--fs/binfmt_elf_fdpic.c980
-rw-r--r--fs/char_dev.c22
-rw-r--r--fs/ext3/acl.h3
-rw-r--r--fs/file.c14
-rw-r--r--fs/hugetlbfs/inode.c4
-rw-r--r--fs/jfs/jfs_txnmgr.c2
-rw-r--r--fs/jfs/namei.c33
-rw-r--r--fs/namei.c8
-rw-r--r--fs/nfsd/nfs4proc.c8
-rw-r--r--fs/nfsd/stats.c10
-rw-r--r--fs/partitions/check.c1
-rw-r--r--fs/proc/array.c6
-rw-r--r--fs/proc/base.c33
-rw-r--r--fs/proc/inode.c2
-rw-r--r--fs/proc/kcore.c4
-rw-r--r--fs/ramfs/file-nommu.c4
-rw-r--r--fs/read_write.c2
-rw-r--r--fs/reiserfs/file.c6
-rw-r--r--fs/reiserfs/procfs.c25
-rw-r--r--fs/splice.c238
-rw-r--r--fs/sysfs/inode.c12
-rw-r--r--fs/xfs/linux-2.6/xfs_linux.h1
24 files changed, 1127 insertions, 294 deletions
diff --git a/fs/Kconfig b/fs/Kconfig
index a7cd7db5e53..ddc7462ddb5 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -1802,6 +1802,7 @@ config CIFS_POSIX
config CIFS_DEBUG2
bool "Enable additional CIFS debugging routines"
+ depends on CIFS
help
Enabling this option adds a few more debugging routines
to the cifs code which slightly increases the size of
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index f42e64210ee..672a3b90bc5 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1185,8 +1185,6 @@ static int maydump(struct vm_area_struct *vma)
return 1;
}
-#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
-
/* An ELF note in memory */
struct memelfnote
{
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index eba4e23b9ca..2f336582922 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -1,6 +1,6 @@
/* binfmt_elf_fdpic.c: FDPIC ELF binary format
*
- * Copyright (C) 2003, 2004 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2003, 2004, 2006 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
* Derived from binfmt_elf.c
*
@@ -24,7 +24,9 @@
#include <linux/file.h>
#include <linux/fcntl.h>
#include <linux/slab.h>
+#include <linux/pagemap.h>
#include <linux/highmem.h>
+#include <linux/highuid.h>
#include <linux/personality.h>
#include <linux/ptrace.h>
#include <linux/init.h>
@@ -48,45 +50,59 @@ typedef char *elf_caddr_t;
#define kdebug(fmt, ...) do {} while(0)
#endif
+#if 0
+#define kdcore(fmt, ...) printk("FDPIC "fmt"\n" ,##__VA_ARGS__ )
+#else
+#define kdcore(fmt, ...) do {} while(0)
+#endif
+
MODULE_LICENSE("GPL");
-static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs);
-//static int load_elf_fdpic_library(struct file *);
-static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params, struct file *file);
-static int elf_fdpic_map_file(struct elf_fdpic_params *params,
- struct file *file,
- struct mm_struct *mm,
- const char *what);
+static int load_elf_fdpic_binary(struct linux_binprm *, struct pt_regs *);
+static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *, struct file *);
+static int elf_fdpic_map_file(struct elf_fdpic_params *, struct file *,
+ struct mm_struct *, const char *);
-static int create_elf_fdpic_tables(struct linux_binprm *bprm,
- struct mm_struct *mm,
- struct elf_fdpic_params *exec_params,
- struct elf_fdpic_params *interp_params);
+static int create_elf_fdpic_tables(struct linux_binprm *, struct mm_struct *,
+ struct elf_fdpic_params *,
+ struct elf_fdpic_params *);
#ifndef CONFIG_MMU
-static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm, unsigned long *_sp);
-static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *params,
- struct file *file,
- struct mm_struct *mm);
+static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *,
+ unsigned long *);
+static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *,
+ struct file *,
+ struct mm_struct *);
#endif
-static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
- struct file *file,
- struct mm_struct *mm);
+static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *,
+ struct file *, struct mm_struct *);
+
+#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+static int elf_fdpic_core_dump(long, struct pt_regs *, struct file *);
+#endif
static struct linux_binfmt elf_fdpic_format = {
.module = THIS_MODULE,
.load_binary = load_elf_fdpic_binary,
-// .load_shlib = load_elf_fdpic_library,
-// .core_dump = elf_fdpic_core_dump,
+#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+ .core_dump = elf_fdpic_core_dump,
+#endif
.min_coredump = ELF_EXEC_PAGESIZE,
};
-static int __init init_elf_fdpic_binfmt(void) { return register_binfmt(&elf_fdpic_format); }
-static void __exit exit_elf_fdpic_binfmt(void) { unregister_binfmt(&elf_fdpic_format); }
+static int __init init_elf_fdpic_binfmt(void)
+{
+ return register_binfmt(&elf_fdpic_format);
+}
+
+static void __exit exit_elf_fdpic_binfmt(void)
+{
+ unregister_binfmt(&elf_fdpic_format);
+}
-module_init(init_elf_fdpic_binfmt)
-module_exit(exit_elf_fdpic_binfmt)
+core_initcall(init_elf_fdpic_binfmt);
+module_exit(exit_elf_fdpic_binfmt);
static int is_elf_fdpic(struct elfhdr *hdr, struct file *file)
{
@@ -105,7 +121,8 @@ static int is_elf_fdpic(struct elfhdr *hdr, struct file *file)
/*
* read the program headers table into memory
*/
-static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params, struct file *file)
+static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params,
+ struct file *file)
{
struct elf32_phdr *phdr;
unsigned long size;
@@ -121,7 +138,8 @@ static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params, struct file *f
if (!params->phdrs)
return -ENOMEM;
- retval = kernel_read(file, params->hdr.e_phoff, (char *) params->phdrs, size);
+ retval = kernel_read(file, params->hdr.e_phoff,
+ (char *) params->phdrs, size);
if (retval < 0)
return retval;
@@ -141,17 +159,24 @@ static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params, struct file *f
}
return 0;
-} /* end elf_fdpic_fetch_phdrs() */
+}
/*****************************************************************************/
/*
* load an fdpic binary into various bits of memory
*/
-static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs)
+static int load_elf_fdpic_binary(struct linux_binprm *bprm,
+ struct pt_regs *regs)
{
struct elf_fdpic_params exec_params, interp_params;
struct elf_phdr *phdr;
- unsigned long stack_size;
+ unsigned long stack_size, entryaddr;
+#ifndef CONFIG_MMU
+ unsigned long fullsize;
+#endif
+#ifdef ELF_FDPIC_PLAT_INIT
+ unsigned long dynaddr;
+#endif
struct file *interpreter = NULL; /* to shut gcc up */
char *interpreter_name = NULL;
int executable_stack;
@@ -212,7 +237,8 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
goto error;
}
- retval = kernel_read(interpreter, 0, bprm->buf, BINPRM_BUF_SIZE);
+ retval = kernel_read(interpreter, 0, bprm->buf,
+ BINPRM_BUF_SIZE);
if (retval < 0)
goto error;
@@ -295,7 +321,8 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
&current->mm->start_stack,
&current->mm->start_brk);
- retval = setup_arg_pages(bprm, current->mm->start_stack, executable_stack);
+ retval = setup_arg_pages(bprm, current->mm->start_stack,
+ executable_stack);
if (retval < 0) {
send_sig(SIGKILL, current, 0);
goto error_kill;
@@ -303,7 +330,8 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
#endif
/* load the executable and interpreter into memory */
- retval = elf_fdpic_map_file(&exec_params, bprm->file, current->mm, "executable");
+ retval = elf_fdpic_map_file(&exec_params, bprm->file, current->mm,
+ "executable");
if (retval < 0)
goto error_kill;
@@ -324,7 +352,8 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
if (!current->mm->start_brk)
current->mm->start_brk = current->mm->end_data;
- current->mm->brk = current->mm->start_brk = PAGE_ALIGN(current->mm->start_brk);
+ current->mm->brk = current->mm->start_brk =
+ PAGE_ALIGN(current->mm->start_brk);
#else
/* create a stack and brk area big enough for everyone
@@ -336,47 +365,45 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
stack_size = PAGE_SIZE * 2;
down_write(&current->mm->mmap_sem);
- current->mm->start_brk = do_mmap(NULL,
- 0,
- stack_size,
+ current->mm->start_brk = do_mmap(NULL, 0, stack_size,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANON | MAP_GROWSDOWN,
0);
- if (IS_ERR((void *) current->mm->start_brk)) {
+ if (IS_ERR_VALUE(current->mm->start_brk)) {
up_write(&current->mm->mmap_sem);
retval = current->mm->start_brk;
current->mm->start_brk = 0;
goto error_kill;
}
- if (do_mremap(current->mm->start_brk,
- stack_size,
- ksize((char *) current->mm->start_brk),
- 0, 0
- ) == current->mm->start_brk
- )
- stack_size = ksize((char *) current->mm->start_brk);
+ /* expand the stack mapping to use up the entire allocation granule */
+ fullsize = ksize((char *) current->mm->start_brk);
+ if (!IS_ERR_VALUE(do_mremap(current->mm->start_brk, stack_size,
+ fullsize, 0, 0)))
+ stack_size = fullsize;
up_write(&current->mm->mmap_sem);
current->mm->brk = current->mm->start_brk;
current->mm->context.end_brk = current->mm->start_brk;
- current->mm->context.end_brk += (stack_size > PAGE_SIZE) ? (stack_size - PAGE_SIZE) : 0;
+ current->mm->context.end_brk +=
+ (stack_size > PAGE_SIZE) ? (stack_size - PAGE_SIZE) : 0;
current->mm->start_stack = current->mm->start_brk + stack_size;
#endif
compute_creds(bprm);
current->flags &= ~PF_FORKNOEXEC;
- if (create_elf_fdpic_tables(bprm, current->mm, &exec_params, &interp_params) < 0)
+ if (create_elf_fdpic_tables(bprm, current->mm,
+ &exec_params, &interp_params) < 0)
goto error_kill;
- kdebug("- start_code %lx", (long) current->mm->start_code);
- kdebug("- end_code %lx", (long) current->mm->end_code);
- kdebug("- start_data %lx", (long) current->mm->start_data);
- kdebug("- end_data %lx", (long) current->mm->end_data);
- kdebug("- start_brk %lx", (long) current->mm->start_brk);
- kdebug("- brk %lx", (long) current->mm->brk);
- kdebug("- start_stack %lx", (long) current->mm->start_stack);
+ kdebug("- start_code %lx", current->mm->start_code);
+ kdebug("- end_code %lx", current->mm->end_code);
+ kdebug("- start_data %lx", current->mm->start_data);
+ kdebug("- end_data %lx", current->mm->end_data);
+ kdebug("- start_brk %lx", current->mm->start_brk);
+ kdebug("- brk %lx", current->mm->brk);
+ kdebug("- start_stack %lx", current->mm->start_stack);
#ifdef ELF_FDPIC_PLAT_INIT
/*
@@ -385,21 +412,18 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
* example. This macro performs whatever initialization to
* the regs structure is required.
*/
- ELF_FDPIC_PLAT_INIT(regs,
- exec_params.map_addr,
- interp_params.map_addr,
- interp_params.dynamic_addr ?: exec_params.dynamic_addr
- );
+ dynaddr = interp_params.dynamic_addr ?: exec_params.dynamic_addr;
+ ELF_FDPIC_PLAT_INIT(regs, exec_params.map_addr, interp_params.map_addr,
+ dynaddr);
#endif
/* everything is now ready... get the userspace context ready to roll */
- start_thread(regs,
- interp_params.entry_addr ?: exec_params.entry_addr,
- current->mm->start_stack);
+ entryaddr = interp_params.entry_addr ?: exec_params.entry_addr;
+ start_thread(regs, entryaddr, current->mm->start_stack);
if (unlikely(current->ptrace & PT_PTRACED)) {
if (current->ptrace & PT_TRACE_EXEC)
- ptrace_notify ((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
+ ptrace_notify((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
else
send_sig(SIGTRAP, current, 0);
}
@@ -419,11 +443,11 @@ error:
return retval;
/* unrecoverable error - kill the process */
- error_kill:
+error_kill:
send_sig(SIGSEGV, current, 0);
goto error;
-} /* end load_elf_fdpic_binary() */
+}
/*****************************************************************************/
/*
@@ -459,6 +483,7 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
*/
hwcap = ELF_HWCAP;
k_platform = ELF_PLATFORM;
+ u_platform = NULL;
if (k_platform) {
platform_len = strlen(k_platform) + 1;
@@ -470,11 +495,11 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
#if defined(__i386__) && defined(CONFIG_SMP)
/* in some cases (e.g. Hyper-Threading), we want to avoid L1 evictions
- * by the processes running on the same package. One thing we can do
- * is to shuffle the initial stack for them.
+ * by the processes running on the same package. One thing we can do is
+ * to shuffle the initial stack for them.
*
- * the conditionals here are unneeded, but kept in to make the
- * code behaviour the same as pre change unless we have hyperthreaded
+ * the conditionals here are unneeded, but kept in to make the code
+ * behaviour the same as pre change unless we have hyperthreaded
* processors. This keeps Mr Marcelo Person happier but should be
* removed for 2.5
*/
@@ -497,11 +522,13 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
if (interp_params->loadmap) {
len = sizeof(struct elf32_fdpic_loadmap);
- len += sizeof(struct elf32_fdpic_loadseg) * interp_params->loadmap->nsegs;
+ len += sizeof(struct elf32_fdpic_loadseg) *
+ interp_params->loadmap->nsegs;
sp = (sp - len) & ~7UL;
interp_params->map_addr = sp;
- if (copy_to_user((void __user *) sp, interp_params->loadmap, len) != 0)
+ if (copy_to_user((void __user *) sp, interp_params->loadmap,
+ len) != 0)
return -EFAULT;
current->mm->context.interp_fdpic_loadmap = (unsigned long) sp;
@@ -525,34 +552,37 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
sp -= sp & 15UL;
/* put the ELF interpreter info on the stack */
-#define NEW_AUX_ENT(nr, id, val) \
- do { \
- struct { unsigned long _id, _val; } __user *ent = (void __user *) csp; \
- __put_user((id), &ent[nr]._id); \
- __put_user((val), &ent[nr]._val); \
+#define NEW_AUX_ENT(nr, id, val) \
+ do { \
+ struct { unsigned long _id, _val; } __user *ent; \
+ \
+ ent = (void __user *) csp; \
+ __put_user((id), &ent[nr]._id); \
+ __put_user((val), &ent[nr]._val); \
} while (0)
csp -= 2 * sizeof(unsigned long);
NEW_AUX_ENT(0, AT_NULL, 0);
if (k_platform) {
csp -= 2 * sizeof(unsigned long);
- NEW_AUX_ENT(0, AT_PLATFORM, (elf_addr_t)(unsigned long) u_platform);
+ NEW_AUX_ENT(0, AT_PLATFORM,
+ (elf_addr_t) (unsigned long) u_platform);
}
csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long);
- NEW_AUX_ENT( 0, AT_HWCAP, hwcap);
- NEW_AUX_ENT( 1, AT_PAGESZ, PAGE_SIZE);
- NEW_AUX_ENT( 2, AT_CLKTCK, CLOCKS_PER_SEC);
- NEW_AUX_ENT( 3, AT_PHDR, exec_params->ph_addr);
- NEW_AUX_ENT( 4, AT_PHENT, sizeof(struct elf_phdr));
- NEW_AUX_ENT( 5, AT_PHNUM, exec_params->hdr.e_phnum);
- NEW_AUX_ENT( 6, AT_BASE, interp_params->elfhdr_addr);
- NEW_AUX_ENT( 7, AT_FLAGS, 0);
- NEW_AUX_ENT( 8, AT_ENTRY, exec_params->entry_addr);
- NEW_AUX_ENT( 9, AT_UID, (elf_addr_t) current->uid);
- NEW_AUX_ENT(10, AT_EUID, (elf_addr_t) current->euid);
- NEW_AUX_ENT(11, AT_GID, (elf_addr_t) current->gid);
- NEW_AUX_ENT(12, AT_EGID, (elf_addr_t) current->egid);
+ NEW_AUX_ENT( 0, AT_HWCAP, hwcap);
+ NEW_AUX_ENT( 1, AT_PAGESZ, PAGE_SIZE);
+ NEW_AUX_ENT( 2, AT_CLKTCK, CLOCKS_PER_SEC);
+ NEW_AUX_ENT( 3, AT_PHDR, exec_params->ph_addr);
+ NEW_AUX_ENT( 4, AT_PHENT, sizeof(struct elf_phdr));
+ NEW_AUX_ENT( 5, AT_PHNUM, exec_params->hdr.e_phnum);
+ NEW_AUX_ENT( 6, AT_BASE, interp_params->elfhdr_addr);
+ NEW_AUX_ENT( 7, AT_FLAGS, 0);
+ NEW_AUX_ENT( 8, AT_ENTRY, exec_params->entry_addr);
+ NEW_AUX_ENT( 9, AT_UID, (elf_addr_t) current->uid);
+ NEW_AUX_ENT(10, AT_EUID, (elf_addr_t) current->euid);
+ NEW_AUX_ENT(11, AT_GID, (elf_addr_t) current->gid);
+ NEW_AUX_ENT(12, AT_EGID, (elf_addr_t) current->egid);
#ifdef ARCH_DLINFO
/* ARCH_DLINFO must come last so platform specific code can enforce
@@ -578,7 +608,8 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
#ifdef CONFIG_MMU
current->mm->arg_start = bprm->p;
#else
- current->mm->arg_start = current->mm->start_stack - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p);
+ current->mm->arg_start = current->mm->start_stack -
+ (MAX_ARG_PAGES * PAGE_SIZE - bprm->p);
#endif
p = (char __user *) current->mm->arg_start;
@@ -606,7 +637,7 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
mm->start_stack = (unsigned long) sp;
return 0;
-} /* end create_elf_fdpic_tables() */
+}
/*****************************************************************************/
/*
@@ -614,7 +645,8 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
* the stack
*/
#ifndef CONFIG_MMU
-static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm, unsigned long *_sp)
+static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm,
+ unsigned long *_sp)
{
unsigned long index, stop, sp;
char *src;
@@ -635,9 +667,9 @@ static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm, unsigned
*_sp = (*_sp - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p)) & ~15;
- out:
+out:
return ret;
-} /* end elf_fdpic_transfer_args_to_stack() */
+}
#endif
/*****************************************************************************/
@@ -712,17 +744,18 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
seg = loadmap->segs;
for (loop = loadmap->nsegs; loop > 0; loop--, seg++) {
if (params->hdr.e_entry >= seg->p_vaddr &&
- params->hdr.e_entry < seg->p_vaddr + seg->p_memsz
- ) {
+ params->hdr.e_entry < seg->p_vaddr + seg->p_memsz) {
params->entry_addr =
- (params->hdr.e_entry - seg->p_vaddr) + seg->addr;
+ (params->hdr.e_entry - seg->p_vaddr) +
+ seg->addr;
break;
}
}
}
/* determine where the program header table has wound up if mapped */
- stop = params->hdr.e_phoff + params->hdr.e_phnum * sizeof (struct elf_phdr);
+ stop = params->hdr.e_phoff;
+ stop += params->hdr.e_phnum * sizeof (struct elf_phdr);
phdr = params->phdrs;
for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) {
@@ -736,9 +769,11 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
seg = loadmap->segs;
for (loop = loadmap->nsegs; loop > 0; loop--, seg++) {
if (phdr->p_vaddr >= seg->p_vaddr &&
- phdr->p_vaddr + phdr->p_filesz <= seg->p_vaddr + seg->p_memsz
- ) {
- params->ph_addr = (phdr->p_vaddr - seg->p_vaddr) + seg->addr +
+ phdr->p_vaddr + phdr->p_filesz <=
+ seg->p_vaddr + seg->p_memsz) {
+ params->ph_addr =
+ (phdr->p_vaddr - seg->p_vaddr) +
+ seg->addr +
params->hdr.e_phoff - phdr->p_offset;
break;
}
@@ -755,18 +790,22 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
seg = loadmap->segs;
for (loop = loadmap->nsegs; loop > 0; loop--, seg++) {
if (phdr->p_vaddr >= seg->p_vaddr &&
- phdr->p_vaddr + phdr->p_memsz <= seg->p_vaddr + seg->p_memsz
- ) {
- params->dynamic_addr = (phdr->p_vaddr - seg->p_vaddr) + seg->addr;
-
- /* check the dynamic section contains at least one item, and that
- * the last item is a NULL entry */
+ phdr->p_vaddr + phdr->p_memsz <=
+ seg->p_vaddr + seg->p_memsz) {
+ params->dynamic_addr =
+ (phdr->p_vaddr - seg->p_vaddr) +
+ seg->addr;
+
+ /* check the dynamic section contains at least
+ * one item, and that the last item is a NULL
+ * entry */
if (phdr->p_memsz == 0 ||
phdr->p_memsz % sizeof(Elf32_Dyn) != 0)
goto dynamic_error;
tmp = phdr->p_memsz / sizeof(Elf32_Dyn);
- if (((Elf32_Dyn *) params->dynamic_addr)[tmp - 1].d_tag != 0)
+ if (((Elf32_Dyn *)
+ params->dynamic_addr)[tmp - 1].d_tag != 0)
goto dynamic_error;
break;
}
@@ -775,8 +814,8 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
}
/* now elide adjacent segments in the load map on MMU linux
- * - on uClinux the holes between may actually be filled with system stuff or stuff from
- * other processes
+ * - on uClinux the holes between may actually be filled with system
+ * stuff or stuff from other processes
*/
#ifdef CONFIG_MMU
nloads = loadmap->nsegs;
@@ -787,7 +826,9 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
if (seg->p_vaddr - mseg->p_vaddr == seg->addr - mseg->addr) {
load_addr = PAGE_ALIGN(mseg->addr + mseg->p_memsz);
if (load_addr == (seg->addr & PAGE_MASK)) {
- mseg->p_memsz += load_addr - (mseg->addr + mseg->p_memsz);
+ mseg->p_memsz +=
+ load_addr -
+ (mseg->addr + mseg->p_memsz);
mseg->p_memsz += seg->addr & ~PAGE_MASK;
mseg->p_memsz += seg->p_memsz;
loadmap->nsegs--;
@@ -815,20 +856,21 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
return 0;
- dynamic_error:
+dynamic_error:
printk("ELF FDPIC %s with invalid DYNAMIC section (inode=%lu)\n",
what, file->f_dentry->d_inode->i_ino);
return -ELIBBAD;
-} /* end elf_fdpic_map_file() */
+}
/*****************************************************************************/
/*
* map a file with constant displacement under uClinux
*/
#ifndef CONFIG_MMU
-static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *params,
- struct file *file,
- struct mm_struct *mm)
+static int elf_fdpic_map_file_constdisp_on_uclinux(
+ struct elf_fdpic_params *params,
+ struct file *file,
+ struct mm_struct *mm)
{
struct elf32_fdpic_loadseg *seg;
struct elf32_phdr *phdr;
@@ -839,7 +881,8 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *para
load_addr = params->load_addr;
seg = params->loadmap->segs;
- /* determine the bounds of the contiguous overall allocation we must make */
+ /* determine the bounds of the contiguous overall allocation we must
+ * make */
phdr = params->phdrs;
for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) {
if (params->phdrs[loop].p_type != PT_LOAD)
@@ -860,7 +903,7 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *para
maddr = do_mmap(NULL, load_addr, top - base,
PROT_READ | PROT_WRITE | PROT_EXEC, mflags, 0);
up_write(&mm->mmap_sem);
- if (IS_ERR((void *) maddr))
+ if (IS_ERR_VALUE(maddr))
return (int) maddr;
if (load_addr != 0)
@@ -878,7 +921,8 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *para
seg->p_vaddr = phdr->p_vaddr;
seg->p_memsz = phdr->p_memsz;
- ret = file->f_op->read(file, (void *) seg->addr, phdr->p_filesz, &fpos);
+ ret = file->f_op->read(file, (void *) seg->addr,
+ phdr->p_filesz, &fpos);
if (ret < 0)
return ret;
@@ -895,8 +939,7 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *para
if (phdr->p_flags & PF_X) {
mm->start_code = seg->addr;
mm->end_code = seg->addr + phdr->p_memsz;
- }
- else if (!mm->start_data) {
+ } else if (!mm->start_data) {
mm->start_data = seg->addr;
#ifndef CONFIG_MMU
mm->end_data = seg->addr + phdr->p_memsz;
@@ -913,7 +956,7 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *para
}
return 0;
-} /* end elf_fdpic_map_file_constdisp_on_uclinux() */
+}
#endif
/*****************************************************************************/
@@ -974,14 +1017,14 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
case ELF_FDPIC_FLAG_CONSTDISP:
/* constant displacement
- * - can be mapped anywhere, but must be mapped as a unit
+ * - can be mapped anywhere, but must be mapped as a
+ * unit
*/
if (!dvset) {
maddr = load_addr;
delta_vaddr = phdr->p_vaddr;
dvset = 1;
- }
- else {
+ } else {
maddr = load_addr + phdr->p_vaddr - delta_vaddr;
flags |= MAP_FIXED;
}
@@ -1005,13 +1048,14 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
up_write(&mm->mmap_sem);
kdebug("mmap[%d] <file> sz=%lx pr=%x fl=%x of=%lx --> %08lx",
- loop, phdr->p_memsz + disp, prot, flags, phdr->p_offset - disp,
- maddr);
+ loop, phdr->p_memsz + disp, prot, flags,
+ phdr->p_offset - disp, maddr);
- if (IS_ERR((void *) maddr))
+ if (IS_ERR_VALUE(maddr))
return (int) maddr;
- if ((params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) == ELF_FDPIC_FLAG_CONTIGUOUS)
+ if ((params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) ==
+ ELF_FDPIC_FLAG_CONTIGUOUS)
load_addr += PAGE_ALIGN(phdr->p_memsz + disp);
seg->addr = maddr + disp;
@@ -1022,7 +1066,8 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
if (phdr->p_offset == 0)
params->elfhdr_addr = seg->addr;
- /* clear the bit between beginning of mapping and beginning of PT_LOAD */
+ /* clear the bit between beginning of mapping and beginning of
+ * PT_LOAD */
if (prot & PROT_WRITE && disp > 0) {
kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr, disp);
clear_user((void __user *) maddr, disp);
@@ -1038,19 +1083,20 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
excess1 = PAGE_SIZE - ((maddr + phdr->p_filesz) & ~PAGE_MASK);
#ifdef CONFIG_MMU
-
if (excess > excess1) {
unsigned long xaddr = maddr + phdr->p_filesz + excess1;
unsigned long xmaddr;
flags |= MAP_FIXED | MAP_ANONYMOUS;
down_write(&mm->mmap_sem);
- xmaddr = do_mmap(NULL, xaddr, excess - excess1, prot, flags, 0);
+ xmaddr = do_mmap(NULL, xaddr, excess - excess1,
+ prot, flags, 0);
up_write(&mm->mmap_sem);
kdebug("mmap[%d] <anon>"
" ad=%lx sz=%lx pr=%x fl=%x of=0 --> %08lx",
- loop, xaddr, excess - excess1, prot, flags, xmaddr);
+ loop, xaddr, excess - excess1, prot, flags,
+ xmaddr);
if (xmaddr != xaddr)
return -ENOMEM;
@@ -1059,7 +1105,8 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
if (prot & PROT_WRITE && excess1 > 0) {
kdebug("clear[%d] ad=%lx sz=%lx",
loop, maddr + phdr->p_filesz, excess1);
- clear_user((void __user *) maddr + phdr->p_filesz, excess1);
+ clear_user((void __user *) maddr + phdr->p_filesz,
+ excess1);
}
#else
@@ -1074,8 +1121,7 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
if (phdr->p_flags & PF_X) {
mm->start_code = maddr;
mm->end_code = maddr + phdr->p_memsz;
- }
- else if (!mm->start_data) {
+ } else if (!mm->start_data) {
mm->start_data = maddr;
mm->end_data = maddr + phdr->p_memsz;
}
@@ -1085,4 +1131,662 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
}
return 0;
-} /* end elf_fdpic_map_file_by_direct_mmap() */
+}
+
+/*****************************************************************************/
+/*
+ * ELF-FDPIC core dumper
+ *
+ * Modelled on fs/exec.c:aout_core_dump()
+ * Jeremy Fitzhardinge <jeremy@sw.oz.au>
+ *
+ * Modelled on fs/binfmt_elf.c core dumper
+ */
+#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+
+/*
+ * These are the only things you should do on a core-file: use only these
+ * functions to write out all the necessary info.
+ */
+static int dump_write(struct file *file, const void *addr, int nr)
+{
+ return file->f_op->write(file, addr, nr, &file->f_pos) == nr;
+}
+
+static int dump_seek(struct file *file, loff_t off)
+{
+ if (file->f_op->llseek) {
+ if (file->f_op->llseek(file, off, SEEK_SET) != off)
+ return 0;
+ } else {
+ file->f_pos = off;
+ }
+ return 1;
+}
+
+/*
+ * Decide whether a segment is worth dumping; default is yes to be
+ * sure (missing info is worse than too much; etc).
+ * Personally I'd include everything, and use the coredump limit...
+ *
+ * I think we should skip something. But I am not sure how. H.J.
+ */
+static int maydump(struct vm_area_struct *vma)
+{
+ /* Do not dump I/O mapped devices or special mappings */
+ if (vma->vm_flags & (VM_IO | VM_RESERVED)) {
+ kdcore("%08lx: %08lx: no (IO)", vma->vm_start, vma->vm_flags);
+ return 0;
+ }
+
+ /* If we may not read the contents, don't allow us to dump
+ * them either. "dump_write()" can't handle it anyway.
+ */
+ if (!(vma->vm_flags & VM_READ)) {
+ kdcore("%08lx: %08lx: no (!read)", vma->vm_start, vma->vm_flags);
+ return 0;
+ }
+
+ /* Dump shared memory only if mapped from an anonymous file. */
+ if (vma->vm_flags & VM_SHARED) {
+ if (vma->vm_file->f_dentry->d_inode->i_nlink == 0) {
+ kdcore("%08lx: %08lx: no (share)", vma->vm_start, vma->vm_flags);
+ return 1;
+ }
+
+ kdcore("%08lx: %08lx: no (share)", vma->vm_start, vma->vm_flags);
+ return 0;
+ }
+
+#ifdef CONFIG_MMU
+ /* If it hasn't been written to, don't write it out */
+ if (!vma->anon_vma) {
+ kdcore("%08lx: %08lx: no (!anon)", vma->vm_start, vma->vm_flags);
+ return 0;
+ }
+#endif
+
+ kdcore("%08lx: %08lx: yes", vma->vm_start, vma->vm_flags);
+ return 1;
+}
+
+/* An ELF note in memory */
+struct memelfnote
+{
+ const char *name;
+ int type;
+ unsigned int datasz;
+ void *data;
+};
+
+static int notesize(struct memelfnote *en)
+{
+ int sz;
+
+ sz = sizeof(struct elf_note);
+ sz += roundup(strlen(en->name) + 1, 4);
+ sz += roundup(en->datasz, 4);
+
+ return sz;
+}
+
+/* #define DEBUG */
+
+#define DUMP_WRITE(addr, nr) \
+ do { if (!dump_write(file, (addr), (nr))) return 0; } while(0)
+#define DUMP_SEEK(off) \
+ do { if (!dump_seek(file, (off))) return 0; } while(0)
+
+static int writenote(struct memelfnote *men, struct file *file)
+{
+ struct elf_note en;
+
+ en.n_namesz = strlen(men->name) + 1;
+ en.n_descsz = men->datasz;
+ en.n_type = men->type;
+
+ DUMP_WRITE(&en, sizeof(en));
+ DUMP_WRITE(men->name, en.n_namesz);
+ /* XXX - cast from long long to long to avoid need for libgcc.a */
+ DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */
+ DUMP_WRITE(men->data, men->datasz);
+ DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */
+
+ return 1;
+}
+#undef DUMP_WRITE
+#undef DUMP_SEEK
+
+#define DUMP_WRITE(addr, nr) \
+ if ((size += (nr)) > limit || !dump_write(file, (addr), (nr))) \
+ goto end_coredump;
+#define DUMP_SEEK(off) \
+ if (!dump_seek(file, (off))) \
+ goto end_coredump;
+
+static inline void fill_elf_fdpic_header(struct elfhdr *elf, int segs)
+{
+ memcpy(elf->e_ident, ELFMAG, SELFMAG);
+ elf->e_ident[EI_CLASS] = ELF_CLASS;
+ elf->e_ident[EI_DATA] = ELF_DATA;
+ elf->e_ident[EI_VERSION] = EV_CURRENT;
+ elf->e_ident[EI_OSABI] = ELF_OSABI;
+ memset(elf->e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);
+
+ elf->e_type = ET_CORE;
+ elf->e_machine = ELF_ARCH;
+ elf->e_version = EV_CURRENT;
+ elf->e_entry = 0;
+ elf->e_phoff = sizeof(struct elfhdr);
+ elf->e_shoff = 0;
+ elf->e_flags = ELF_FDPIC_CORE_EFLAGS;
+ elf->e_ehsize = sizeof(struct elfhdr);
+ elf->e_phentsize = sizeof(struct elf_phdr);
+ elf->e_phnum = segs;
+ elf->e_shentsize = 0;
+ elf->e_shnum = 0;
+ elf->e_shstrndx = 0;
+ return;
+}
+
+static inline void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, loff_t offset)
+{
+ phdr->p_type = PT_NOTE;
+ phdr->p_offset = offset;
+ phdr->p_vaddr = 0;
+ phdr->p_paddr = 0;
+ phdr->p_filesz = sz;
+ phdr->p_memsz = 0;
+ phdr->p_flags = 0;
+ phdr->p_align = 0;
+ return;
+}
+
+static inline void fill_note(struct memelfnote *note, const char *name, int type,
+ unsigned int sz, void *data)
+{
+ note->name = name;
+ note->type = type;
+ note->datasz = sz;
+ note->data = data;
+ return;
+}
+
+/*
+ * fill up all the fields in prstatus from the given task struct, except
+ * registers which need to be filled up seperately.
+ */
+static void fill_prstatus(struct elf_prstatus *prstatus,
+ struct task_struct *p, long signr)
+{
+ prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
+ prstatus->pr_sigpend = p->pending.signal.sig[0];
+ prstatus->pr_sighold = p->blocked.sig[0];
+ prstatus->pr_pid = p->pid;
+ prstatus->pr_ppid = p->parent->pid;
+ prstatus->pr_pgrp = process_group(p);
+ prstatus->pr_sid = p->signal->session;
+ if (thread_group_leader(p)) {
+ /*
+ * This is the record for the group leader. Add in the
+ * cumulative times of previous dead threads. This total
+ * won't include the time of each live thread whose state
+ * is included in the core dump. The final total reported
+ * to our parent process when it calls wait4 will include
+ * those sums as well as the little bit more time it takes
+ * this and each other thread to finish dying after the
+ * core dump synchronization phase.
+ */
+ cputime_to_timeval(cputime_add(p->utime, p->signal->utime),
+ &prstatus->pr_utime);
+ cputime_to_timeval(cputime_add(p->stime, p->signal->stime),
+ &prstatus->pr_stime);
+ } else {
+ cputime_to_timeval(p->utime, &prstatus->pr_utime);
+ cputime_to_timeval(p->stime, &prstatus->pr_stime);
+ }
+ cputime_to_timeval(p->signal->cutime, &prstatus->pr_cutime);
+ cputime_to_timeval(p->signal->cstime, &prstatus->pr_cstime);
+
+ prstatus->pr_exec_fdpic_loadmap = p->mm->context.exec_fdpic_loadmap;
+ prstatus->pr_interp_fdpic_loadmap = p->mm->context.interp_fdpic_loadmap;
+}
+
+static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
+ struct mm_struct *mm)
+{
+ unsigned int i, len;
+
+ /* first copy the parameters from user space */
+ memset(psinfo, 0, sizeof(struct elf_prpsinfo));
+
+ len = mm->arg_end - mm->arg_start;
+ if (len >= ELF_PRARGSZ)
+ len = ELF_PRARGSZ - 1;
+ if (copy_from_user(&psinfo->pr_psargs,
+ (const char __user *) mm->arg_start, len))
+ return -EFAULT;
+ for (i = 0; i < len; i++)
+ if (psinfo->pr_psargs[i] == 0)
+ psinfo->pr_psargs[i] = ' ';
+ psinfo->pr_psargs[len] = 0;
+
+ psinfo->pr_pid = p->pid;
+ psinfo->pr_ppid = p->parent->pid;
+ psinfo->pr_pgrp = process_group(p);
+ psinfo->pr_sid = p->signal->session;
+
+ i = p->state ? ffz(~p->state) + 1 : 0;
+ psinfo->pr_state = i;
+ psinfo->pr_sname = (i > 5) ? '.' : "RSDTZW"[i];
+ psinfo->pr_zomb = psinfo->pr_sname == 'Z';
+ psinfo->pr_nice = task_nice(p);
+ psinfo->pr_flag = p->flags;
+ SET_UID(psinfo->pr_uid, p->uid);
+ SET_GID(psinfo->pr_gid, p->gid);
+ strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname));
+
+ return 0;
+}
+
+/* Here is the structure in which status of each thread is captured. */
+struct elf_thread_status
+{
+ struct list_head list;
+ struct elf_prstatus prstatus; /* NT_PRSTATUS */
+ elf_fpregset_t fpu; /* NT_PRFPREG */
+ struct task_struct *thread;
+#ifdef ELF_CORE_COPY_XFPREGS
+ elf_fpxregset_t xfpu; /* NT_PRXFPREG */
+#endif
+ struct memelfnote notes[3];
+ int num_notes;
+};
+
+/*
+ * In order to add the specific thread information for the elf file format,
+ * we need to keep a linked list of every thread's pr_status and then create
+ * a single section for them in the final core file.
+ */
+static int elf_dump_thread_status(long signr, struct elf_thread_status *t)
+{
+ struct task_struct *p = t->thread;
+ int sz = 0;
+
+ t->num_notes = 0;
+
+ fill_prstatus(&t->prstatus, p, signr);
+ elf_core_copy_task_regs(p, &t->prstatus.pr_reg);
+
+ fill_note(&t->notes[0], "CORE", NT_PRSTATUS, sizeof(t->prstatus),
+ &t->prstatus);
+ t->num_notes++;
+ sz += notesize(&t->notes[0]);
+
+ t->prstatus.pr_fpvalid = elf_core_copy_task_fpregs(p, NULL, &t->fpu);
+ if (t->prstatus.pr_fpvalid) {
+ fill_note(&t->notes[1], "CORE", NT_PRFPREG, sizeof(t->fpu),
+ &t->fpu);
+ t->num_notes++;
+ sz += notesize(&t->notes[1]);
+ }
+
+#ifdef ELF_CORE_COPY_XFPREGS
+ if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
+ fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
+ &t->xfpu);
+ t->num_notes++;
+ sz += notesize(&t->notes[2]);
+ }
+#endif
+ return sz;
+}
+
+/*
+ * dump the segments for an MMU process
+ */
+#ifdef CONFIG_MMU
+static int elf_fdpic_dump_segments(struct file *file, struct mm_struct *mm,
+ size_t *size, unsigned long *limit)
+{
+ struct vm_area_struct *vma;
+
+ for (vma = current->mm->mmap; vma; vma = vma->vm_next) {
+ unsigned long addr;
+
+ if (!maydump(vma))
+ continue;
+
+ for (addr = vma->vm_start;
+ addr < vma->vm_end;
+ addr += PAGE_SIZE
+ ) {
+ struct vm_area_struct *vma;
+ struct page *page;
+
+ if (get_user_pages(current, current->mm, addr, 1, 0, 1,
+ &page, &vma) <= 0) {
+ DUMP_SEEK(file->f_pos + PAGE_SIZE);
+ }
+ else if (page == ZERO_PAGE(addr)) {
+ DUMP_SEEK(file->f_pos + PAGE_SIZE);
+ page_cache_release(page);
+ }
+ else {
+ void *kaddr;
+
+ flush_cache_page(vma, addr, page_to_pfn(page));
+ kaddr = kmap(page);
+ if ((*size += PAGE_SIZE) > *limit ||
+ !dump_write(file, kaddr, PAGE_SIZE)
+ ) {
+ kunmap(page);
+ page_cache_release(page);
+ return -EIO;
+ }
+ kunmap(page);
+ page_cache_release(page);
+ }
+ }
+ }
+
+ return 0;
+
+end_coredump:
+ return -EFBIG;
+}
+#endif
+
+/*
+ * dump the segments for a NOMMU process
+ */
+#ifndef CONFIG_MMU
+static int elf_fdpic_dump_segments(struct file *file, struct mm_struct *mm,
+ size_t *size, unsigned long *limit)
+{
+ struct vm_list_struct *vml;
+
+ for (vml = current->mm->context.vmlist; vml; vml = vml->next) {
+ struct vm_area_struct *vma = vml->vma;
+
+ if (!maydump(vma))
+ continue;
+
+ if ((*size += PAGE_SIZE) > *limit)
+ return -EFBIG;
+
+ if (!dump_write(file, (void *) vma->vm_start,
+ vma->vm_end - vma->vm_start))
+ return -EIO;
+ }
+
+ return 0;
+}
+#endif
+
+/*
+ * Actual dumper
+ *
+ * This is a two-pass process; first we find the offsets of the bits,
+ * and then they are actually written out. If we run out of core limit
+ * we just truncate.
+ */
+static int elf_fdpic_core_dump(long signr, struct pt_regs *regs,
+ struct file *file)
+{
+#define NUM_NOTES 6
+ int has_dumped = 0;
+ mm_segment_t fs;
+ int segs;
+ size_t size = 0;
+ int i;
+ struct vm_area_struct *vma;
+ struct elfhdr *elf = NULL;
+ loff_t offset = 0, dataoff;
+ unsigned long limit = current->signal->rlim[RLIMIT_CORE].rlim_cur;
+ int numnote;
+ struct memelfnote *notes = NULL;
+ struct elf_prstatus *prstatus = NULL; /* NT_PRSTATUS */
+ struct elf_prpsinfo *psinfo = NULL; /* NT_PRPSINFO */
+ struct task_struct *g, *p;
+ LIST_HEAD(thread_list);
+ struct list_head *t;
+ elf_fpregset_t *fpu = NULL;
+#ifdef ELF_CORE_COPY_XFPREGS
+ elf_fpxregset_t *xfpu = NULL;
+#endif
+ int thread_status_size = 0;
+#ifndef CONFIG_MMU
+ struct vm_list_struct *vml;
+#endif
+ elf_addr_t *auxv;
+
+ /*
+ * We no longer stop all VM operations.
+ *
+ * This is because those proceses that could possibly change map_count
+ * or the mmap / vma pages are now blocked in do_exit on current
+ * finishing this core dump.
+ *
+ * Only ptrace can touch these memory addresses, but it doesn't change
+ * the map_count or the pages allocated. So no possibility of crashing
+ * exists while dumping the mm->vm_next areas to the core file.
+ */
+
+ /* alloc memory for large data structures: too large to be on stack */
+ elf = kmalloc(sizeof(*elf), GFP_KERNEL);
+ if (!elf)
+ goto cleanup;
+ prstatus = kzalloc(sizeof(*prstatus), GFP_KERNEL);
+ if (!prstatus)
+ goto cleanup;
+ psinfo = kmalloc(sizeof(*psinfo), GFP_KERNEL);
+ if (!psinfo)
+ goto cleanup;
+ notes = kmalloc(NUM_NOTES * sizeof(struct memelfnote), GFP_KERNEL);
+ if (!notes)
+ goto cleanup;
+ fpu = kmalloc(sizeof(*fpu), GFP_KERNEL);
+ if (!fpu)
+ goto cleanup;
+#ifdef ELF_CORE_COPY_XFPREGS
+ xfpu = kmalloc(sizeof(*xfpu), GFP_KERNEL);
+ if (!xfpu)
+ goto cleanup;
+#endif
+
+ if (signr) {
+ struct elf_thread_status *tmp;
+ read_lock(&tasklist_lock);
+ do_each_thread(g,p)
+ if (current->mm == p->mm && current != p) {
+ tmp = kzalloc(sizeof(*tmp), GFP_ATOMIC);
+ if (!tmp) {
+ read_unlock(&tasklist_lock);
+ goto cleanup;
+ }
+ INIT_LIST_HEAD(&tmp->list);
+ tmp->thread = p;
+ list_add(&tmp->list, &thread_list);
+ }
+ while_each_thread(g,p);
+ read_unlock(&tasklist_lock);
+ list_for_each(t, &thread_list) {
+ struct elf_thread_status *tmp;
+ int sz;
+
+ tmp = list_entry(t, struct elf_thread_status, list);
+ sz = elf_dump_thread_status(signr, tmp);
+ thread_status_size += sz;
+ }
+ }
+
+ /* now collect the dump for the current */
+ fill_prstatus(prstatus, current, signr);
+ elf_core_copy_regs(&prstatus->pr_reg, regs);
+
+#ifdef CONFIG_MMU
+ segs = current->mm->map_count;
+#else
+ segs = 0;
+ for (vml = current->mm->context.vmlist; vml; vml = vml->next)
+ segs++;
+#endif
+#ifdef ELF_CORE_EXTRA_PHDRS
+ segs += ELF_CORE_EXTRA_PHDRS;
+#endif
+
+ /* Set up header */
+ fill_elf_fdpic_header(elf, segs + 1); /* including notes section */
+
+ has_dumped = 1;
+ current->flags |= PF_DUMPCORE;
+
+ /*
+ * Set up the notes in similar form to SVR4 core dumps made
+ * with info from their /proc.
+ */
+
+ fill_note(notes + 0, "CORE", NT_PRSTATUS, sizeof(*prstatus), prstatus);
+ fill_psinfo(psinfo, current->group_leader, current->mm);
+ fill_note(notes + 1, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo);
+
+ numnote = 2;
+
+ auxv = (elf_addr_t *) current->mm->saved_auxv;
+
+ i = 0;
+ do
+ i += 2;
+ while (auxv[i - 2] != AT_NULL);
+ fill_note(&notes[numnote++], "CORE", NT_AUXV,
+ i * sizeof(elf_addr_t), auxv);
+
+ /* Try to dump the FPU. */
+ if ((prstatus->pr_fpvalid =
+ elf_core_copy_task_fpregs(current, regs, fpu)))
+ fill_note(notes + numnote++,
+ "CORE", NT_PRFPREG, sizeof(*fpu), fpu);
+#ifdef ELF_CORE_COPY_XFPREGS
+ if (elf_core_copy_task_xfpregs(current, xfpu))
+ fill_note(notes + numnote++,
+ "LINUX", NT_PRXFPREG, sizeof(*xfpu), xfpu);
+#endif
+
+ fs = get_fs();
+ set_fs(KERNEL_DS);
+
+ DUMP_WRITE(elf, sizeof(*elf));
+ offset += sizeof(*elf); /* Elf header */
+ offset += (segs+1) * sizeof(struct elf_phdr); /* Program headers */
+
+ /* Write notes phdr entry */
+ {
+ struct elf_phdr phdr;
+ int sz = 0;
+
+ for (i = 0; i < numnote; i++)
+ sz += notesize(notes + i);
+
+ sz += thread_status_size;
+
+ fill_elf_note_phdr(&phdr, sz, offset);
+ offset += sz;
+ DUMP_WRITE(&phdr, sizeof(phdr));
+ }
+
+ /* Page-align dumped data */
+ dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE);
+
+ /* write program headers for segments dump */
+ for (
+#ifdef CONFIG_MMU
+ vma = current->mm->mmap; vma; vma = vma->vm_next
+#else
+ vml = current->mm->context.vmlist; vml; vml = vml->next
+#endif
+ ) {
+ struct elf_phdr phdr;
+ size_t sz;
+
+#ifndef CONFIG_MMU
+ vma = vml->vma;
+#endif
+
+ sz = vma->vm_end - vma->vm_start;
+
+ phdr.p_type = PT_LOAD;
+ phdr.p_offset = offset;
+ phdr.p_vaddr = vma->vm_start;
+ phdr.p_paddr = 0;
+ phdr.p_filesz = maydump(vma) ? sz : 0;
+ phdr.p_memsz = sz;
+ offset += phdr.p_filesz;
+ phdr.p_flags = vma->vm_flags & VM_READ ? PF_R : 0;
+ if (vma->vm_flags & VM_WRITE)
+ phdr.p_flags |= PF_W;
+ if (vma->vm_flags & VM_EXEC)
+ phdr.p_flags |= PF_X;
+ phdr.p_align = ELF_EXEC_PAGESIZE;
+
+ DUMP_WRITE(&phdr, sizeof(phdr));
+ }
+
+#ifdef ELF_CORE_WRITE_EXTRA_PHDRS
+ ELF_CORE_WRITE_EXTRA_PHDRS;
+#endif
+
+ /* write out the notes section */
+ for (i = 0; i < numnote; i++)
+ if (!writenote(notes + i, file))
+ goto end_coredump;
+
+ /* write out the thread status notes section */
+ list_for_each(t, &thread_list) {
+ struct elf_thread_status *tmp =
+ list_entry(t, struct elf_thread_status, list);
+
+ for (i = 0; i < tmp->num_notes; i++)
+ if (!writenote(&tmp->notes[i], file))
+ goto end_coredump;
+ }
+
+ DUMP_SEEK(dataoff);
+
+ if (elf_fdpic_dump_segments(file, current->mm, &size, &limit) < 0)
+ goto end_coredump;
+
+#ifdef ELF_CORE_WRITE_EXTRA_DATA
+ ELF_CORE_WRITE_EXTRA_DATA;
+#endif
+
+ if (file->f_pos != offset) {
+ /* Sanity check */
+ printk(KERN_WARNING
+ "elf_core_dump: file->f_pos (%lld) != offset (%lld)\n",
+ file->f_pos, offset);
+ }
+
+end_coredump:
+ set_fs(fs);
+
+cleanup:
+ while (!list_empty(&thread_list)) {
+ struct list_head *tmp = thread_list.next;
+ list_del(tmp);
+ kfree(list_entry(tmp, struct elf_thread_status, list));
+ }
+
+ kfree(elf);
+ kfree(prstatus);
+ kfree(psinfo);
+ kfree(notes);
+ kfree(fpu);
+#ifdef ELF_CORE_COPY_XFPREGS
+ kfree(xfpu);
+#endif
+ return has_dumped;
+#undef NUM_NOTES
+}
+
+#endif /* USE_ELF_CORE_DUMP */
diff --git a/fs/char_dev.c b/fs/char_dev.c
index a4cbc6706ef..3483d3cf808 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -182,6 +182,28 @@ int alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count,
return 0;
}
+/**
+ * register_chrdev() - Register a major number for character devices.
+ * @major: major device number or 0 for dynamic allocation
+ * @name: name of this range of devices
+ * @fops: file operations associated with this devices
+ *
+ * If @major == 0 this functions will dynamically allocate a major and return
+ * its number.
+ *
+ * If @major > 0 this function will attempt to reserve a device with the given
+ * major number and will return zero on success.
+ *
+ * Returns a -ve errno on failure.
+ *
+ * The name of this device has nothing to do with the name of the device in
+ * /dev. It only helps to keep track of the different owners of devices. If
+ * your module name has only one type of devices it's ok to use e.g. the name
+ * of the module here.
+ *
+ * This function registers a range of 256 minor numbers. The first minor number
+ * is 0.
+ */
int register_chrdev(unsigned int major, const char *name,
const struct file_operations *fops)
{
diff --git a/fs/ext3/acl.h b/fs/ext3/acl.h
index 92d50b53a93..0d1e6279cbf 100644
--- a/fs/ext3/acl.h
+++ b/fs/ext3/acl.h
@@ -62,9 +62,6 @@ extern int ext3_permission (struct inode *, int, struct nameidata *);
extern int ext3_acl_chmod (struct inode *);
extern int ext3_init_acl (handle_t *, struct inode *, struct inode *);
-extern int init_ext3_acl(void);
-extern void exit_ext3_acl(void);
-
#else /* CONFIG_EXT3_FS_POSIX_ACL */
#include <linux/sched.h>
#define ext3_permission NULL
diff --git a/fs/file.c b/fs/file.c
index 55f4e702256..b3c6b82e6a9 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -240,13 +240,9 @@ static struct fdtable *alloc_fdtable(int nr)
if (!fdt)
goto out;
- nfds = 8 * L1_CACHE_BYTES;
- /* Expand to the max in easy steps */
- while (nfds <= nr) {
- nfds = nfds * 2;
- if (nfds > NR_OPEN)
- nfds = NR_OPEN;
- }
+ nfds = max_t(int, 8 * L1_CACHE_BYTES, roundup_pow_of_two(nr + 1));
+ if (nfds > NR_OPEN)
+ nfds = NR_OPEN;
new_openset = alloc_fdset(nfds);
new_execset = alloc_fdset(nfds);
@@ -277,11 +273,13 @@ static struct fdtable *alloc_fdtable(int nr)
} while (nfds <= nr);
new_fds = alloc_fd_array(nfds);
if (!new_fds)
- goto out;
+ goto out2;
fdt->fd = new_fds;
fdt->max_fds = nfds;
fdt->free_files = NULL;
return fdt;
+out2:
+ nfds = fdt->max_fdset;
out:
if (new_openset)
free_fdset(new_openset, nfds);
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 6449cb69796..c3920c96dad 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -83,8 +83,6 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
ret = -ENOMEM;
len = vma_len + ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
- if (!(vma->vm_flags & VM_WRITE) && len > inode->i_size)
- goto out;
if (vma->vm_flags & VM_MAYSHARE &&
hugetlb_reserve_pages(inode, vma->vm_pgoff >> (HPAGE_SHIFT-PAGE_SHIFT),
@@ -93,7 +91,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
ret = 0;
hugetlb_prefault_arch_hook(vma->vm_mm);
- if (inode->i_size < len)
+ if (vma->vm_flags & VM_WRITE && inode->i_size < len)
inode->i_size = len;
out:
mutex_unlock(&inode->i_mutex);
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index 10c46231ce1..efbb586bed4 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -2944,7 +2944,7 @@ int jfs_sync(void *arg)
* Inode is being freed
*/
list_del_init(&jfs_ip->anon_inode_list);
- } else if (! !mutex_trylock(&jfs_ip->commit_mutex)) {
+ } else if (mutex_trylock(&jfs_ip->commit_mutex)) {
/*
* inode will be removed from anonymous list
* when it is committed
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 09ea03f6227..295268ad231 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -165,8 +165,8 @@ static int jfs_create(struct inode *dip, struct dentry *dentry, int mode,
out3:
txEnd(tid);
- mutex_unlock(&JFS_IP(dip)->commit_mutex);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
+ mutex_unlock(&JFS_IP(dip)->commit_mutex);
if (rc) {
free_ea_wmap(ip);
ip->i_nlink = 0;
@@ -300,8 +300,8 @@ static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode)
out3:
txEnd(tid);
- mutex_unlock(&JFS_IP(dip)->commit_mutex);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
+ mutex_unlock(&JFS_IP(dip)->commit_mutex);
if (rc) {
free_ea_wmap(ip);
ip->i_nlink = 0;
@@ -384,8 +384,8 @@ static int jfs_rmdir(struct inode *dip, struct dentry *dentry)
if (rc == -EIO)
txAbort(tid, 1);
txEnd(tid);
- mutex_unlock(&JFS_IP(dip)->commit_mutex);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
+ mutex_unlock(&JFS_IP(dip)->commit_mutex);
goto out2;
}
@@ -422,8 +422,8 @@ static int jfs_rmdir(struct inode *dip, struct dentry *dentry)
txEnd(tid);
- mutex_unlock(&JFS_IP(dip)->commit_mutex);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
+ mutex_unlock(&JFS_IP(dip)->commit_mutex);
/*
* Truncating the directory index table is not guaranteed. It
@@ -503,8 +503,8 @@ static int jfs_unlink(struct inode *dip, struct dentry *dentry)
if (rc == -EIO)
txAbort(tid, 1); /* Marks FS Dirty */
txEnd(tid);
- mutex_unlock(&JFS_IP(dip)->commit_mutex);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
+ mutex_unlock(&JFS_IP(dip)->commit_mutex);
IWRITE_UNLOCK(ip);
goto out1;
}
@@ -527,8 +527,8 @@ static int jfs_unlink(struct inode *dip, struct dentry *dentry)
if ((new_size = commitZeroLink(tid, ip)) < 0) {
txAbort(tid, 1); /* Marks FS Dirty */
txEnd(tid);
- mutex_unlock(&JFS_IP(dip)->commit_mutex);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
+ mutex_unlock(&JFS_IP(dip)->commit_mutex);
IWRITE_UNLOCK(ip);
rc = new_size;
goto out1;
@@ -556,9 +556,8 @@ static int jfs_unlink(struct inode *dip, struct dentry *dentry)
txEnd(tid);
- mutex_unlock(&JFS_IP(dip)->commit_mutex);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
-
+ mutex_unlock(&JFS_IP(dip)->commit_mutex);
while (new_size && (rc == 0)) {
tid = txBegin(dip->i_sb, 0);
@@ -847,8 +846,8 @@ static int jfs_link(struct dentry *old_dentry,
out:
txEnd(tid);
- mutex_unlock(&JFS_IP(dir)->commit_mutex);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
+ mutex_unlock(&JFS_IP(dir)->commit_mutex);
jfs_info("jfs_link: rc:%d", rc);
return rc;
@@ -1037,8 +1036,8 @@ static int jfs_symlink(struct inode *dip, struct dentry *dentry,
out3:
txEnd(tid);
- mutex_unlock(&JFS_IP(dip)->commit_mutex);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
+ mutex_unlock(&JFS_IP(dip)->commit_mutex);
if (rc) {
free_ea_wmap(ip);
ip->i_nlink = 0;
@@ -1160,10 +1159,11 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (S_ISDIR(new_ip->i_mode)) {
new_ip->i_nlink--;
if (new_ip->i_nlink) {
- mutex_unlock(&JFS_IP(new_dir)->commit_mutex);
- mutex_unlock(&JFS_IP(old_ip)->commit_mutex);
+ mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
if (old_dir != new_dir)
mutex_unlock(&JFS_IP(old_dir)->commit_mutex);
+ mutex_unlock(&JFS_IP(old_ip)->commit_mutex);
+ mutex_unlock(&JFS_IP(new_dir)->commit_mutex);
if (!S_ISDIR(old_ip->i_mode) && new_ip)
IWRITE_UNLOCK(new_ip);
jfs_error(new_ip->i_sb,
@@ -1281,13 +1281,12 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
out4:
txEnd(tid);
-
- mutex_unlock(&JFS_IP(new_dir)->commit_mutex);
- mutex_unlock(&JFS_IP(old_ip)->commit_mutex);
- if (old_dir != new_dir)
- mutex_unlock(&JFS_IP(old_dir)->commit_mutex);
if (new_ip)
mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
+ if (old_dir != new_dir)
+ mutex_unlock(&JFS_IP(old_dir)->commit_mutex);
+ mutex_unlock(&JFS_IP(old_ip)->commit_mutex);
+ mutex_unlock(&JFS_IP(new_dir)->commit_mutex);
while (new_size && (rc == 0)) {
tid = txBegin(new_ip->i_sb, 0);
diff --git a/fs/namei.c b/fs/namei.c
index c9750d755af..e01070d7bf5 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1712,8 +1712,14 @@ do_link:
if (error)
goto exit_dput;
error = __do_follow_link(&path, nd);
- if (error)
+ if (error) {
+ /* Does someone understand code flow here? Or it is only
+ * me so stupid? Anathema to whoever designed this non-sense
+ * with "intent.open".
+ */
+ release_open_intent(nd);
return error;
+ }
nd->flags &= ~LOOKUP_PARENT;
if (nd->last_type == LAST_BIND)
goto ok;
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index b0e095ea0c0..ee4eff27aed 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -721,6 +721,12 @@ nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
return nfs_ok;
}
+static inline void nfsd4_increment_op_stats(u32 opnum)
+{
+ if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
+ nfsdstats.nfs4_opcount[opnum]++;
+}
+
/*
* COMPOUND call.
@@ -930,6 +936,8 @@ encode_op:
/* XXX Ugh, we need to get rid of this kind of special case: */
if (op->opnum == OP_READ && op->u.read.rd_filp)
fput(op->u.read.rd_filp);
+
+ nfsd4_increment_op_stats(op->opnum);
}
out:
diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c
index 57265d56380..71944cddf68 100644
--- a/fs/nfsd/stats.c
+++ b/fs/nfsd/stats.c
@@ -72,6 +72,16 @@ static int nfsd_proc_show(struct seq_file *seq, void *v)
/* show my rpc info */
svc_seq_show(seq, &nfsd_svcstats);
+#ifdef CONFIG_NFSD_V4
+ /* Show count for individual nfsv4 operations */
+ /* Writing operation numbers 0 1 2 also for maintaining uniformity */
+ seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1);
+ for (i = 0; i <= LAST_NFS4_OP; i++)
+ seq_printf(seq, " %u", nfsdstats.nfs4_opcount[i]);
+
+ seq_putc(seq, '\n');
+#endif
+
return 0;
}
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 839634026eb..51c6a748df4 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -339,6 +339,7 @@ void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len)
p->start_sect = start;
p->nr_sects = len;
p->partno = part;
+ p->policy = disk->policy;
if (isdigit(disk->kobj.name[strlen(disk->kobj.name)-1]))
snprintf(p->kobj.name,KOBJ_NAME_LEN,"%sp%d",disk->kobj.name,part);
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 7495d3e2077..0b615d62a15 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -74,6 +74,7 @@
#include <linux/times.h>
#include <linux/cpuset.h>
#include <linux/rcupdate.h>
+#include <linux/delayacct.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@@ -411,7 +412,7 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
-%lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
+%lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu %llu\n",
task->pid,
tcomm,
state,
@@ -455,7 +456,8 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
task->exit_signal,
task_cpu(task),
task->rt_priority,
- task->policy);
+ task->policy,
+ (unsigned long long)delayacct_blkio_ticks(task));
if(mm)
mmput(mm);
return res;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 243a94af042..fe8d55fb17c 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -551,6 +551,27 @@ static int proc_fd_access_allowed(struct inode *inode)
return allowed;
}
+static int proc_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ int error;
+ struct inode *inode = dentry->d_inode;
+
+ if (attr->ia_valid & ATTR_MODE)
+ return -EPERM;
+
+ error = inode_change_ok(inode, attr);
+ if (!error) {
+ error = security_inode_setattr(dentry, attr);
+ if (!error)
+ error = inode_setattr(inode, attr);
+ }
+ return error;
+}
+
+static struct inode_operations proc_def_inode_operations = {
+ .setattr = proc_setattr,
+};
+
extern struct seq_operations mounts_op;
struct proc_mounts {
struct seq_file m;
@@ -1111,7 +1132,8 @@ out:
static struct inode_operations proc_pid_link_inode_operations = {
.readlink = proc_pid_readlink,
- .follow_link = proc_pid_follow_link
+ .follow_link = proc_pid_follow_link,
+ .setattr = proc_setattr,
};
static int proc_readfd(struct file * filp, void * dirent, filldir_t filldir)
@@ -1285,6 +1307,7 @@ static struct inode *proc_pid_make_inode(struct super_block * sb, struct task_st
ei = PROC_I(inode);
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
inode->i_ino = fake_ino(task->pid, ino);
+ inode->i_op = &proc_def_inode_operations;
/*
* grab the reference to task.
@@ -1339,6 +1362,7 @@ static int pid_revalidate(struct dentry *dentry, struct nameidata *nd)
inode->i_uid = 0;
inode->i_gid = 0;
}
+ inode->i_mode &= ~(S_ISUID | S_ISGID);
security_task_to_inode(task, inode);
put_task_struct(task);
return 1;
@@ -1389,6 +1413,7 @@ static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
inode->i_uid = 0;
inode->i_gid = 0;
}
+ inode->i_mode &= ~(S_ISUID | S_ISGID);
security_task_to_inode(task, inode);
put_task_struct(task);
return 1;
@@ -1527,11 +1552,13 @@ static struct file_operations proc_task_operations = {
*/
static struct inode_operations proc_fd_inode_operations = {
.lookup = proc_lookupfd,
+ .setattr = proc_setattr,
};
static struct inode_operations proc_task_inode_operations = {
.lookup = proc_task_lookup,
.getattr = proc_task_getattr,
+ .setattr = proc_setattr,
};
#ifdef CONFIG_SECURITY
@@ -1845,11 +1872,13 @@ static struct file_operations proc_tid_base_operations = {
static struct inode_operations proc_tgid_base_inode_operations = {
.lookup = proc_tgid_base_lookup,
.getattr = pid_getattr,
+ .setattr = proc_setattr,
};
static struct inode_operations proc_tid_base_inode_operations = {
.lookup = proc_tid_base_lookup,
.getattr = pid_getattr,
+ .setattr = proc_setattr,
};
#ifdef CONFIG_SECURITY
@@ -1892,11 +1921,13 @@ static struct dentry *proc_tid_attr_lookup(struct inode *dir,
static struct inode_operations proc_tgid_attr_inode_operations = {
.lookup = proc_tgid_attr_lookup,
.getattr = pid_getattr,
+ .setattr = proc_setattr,
};
static struct inode_operations proc_tid_attr_inode_operations = {
.lookup = proc_tid_attr_lookup,
.getattr = pid_getattr,
+ .setattr = proc_setattr,
};
#endif
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 6dcef089e18..49dfb2ab783 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -192,7 +192,7 @@ int proc_fill_super(struct super_block *s, void *data, int silent)
{
struct inode * root_inode;
- s->s_flags |= MS_NODIRATIME;
+ s->s_flags |= MS_NODIRATIME | MS_NOSUID | MS_NOEXEC;
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
s->s_magic = PROC_SUPER_MAGIC;
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 036d14d8362..6a984f64edd 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -42,8 +42,6 @@ const struct file_operations proc_kcore_operations = {
#define kc_offset_to_vaddr(o) ((o) + PAGE_OFFSET)
#endif
-#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
-
/* An ELF note in memory */
struct memelfnote
{
@@ -384,7 +382,7 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
*/
if (n) {
if (clear_user(buffer + tsz - n,
- tsz - n))
+ n))
return -EFAULT;
}
} else {
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 99fffc9e1bf..677139b48e0 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -283,9 +283,9 @@ unsigned long ramfs_nommu_get_unmapped_area(struct file *file,
/*****************************************************************************/
/*
- * set up a mapping
+ * set up a mapping for shared memory segments
*/
int ramfs_nommu_mmap(struct file *file, struct vm_area_struct *vma)
{
- return 0;
+ return vma->vm_flags & VM_SHARED ? 0 : -ENOSYS;
}
diff --git a/fs/read_write.c b/fs/read_write.c
index 5bc0e9234f9..d4cb3183c99 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -436,7 +436,7 @@ unsigned long iov_shorten(struct iovec *iov, unsigned long nr_segs, size_t to)
return seg;
}
-EXPORT_SYMBOL(iov_shorten);
+EXPORT_UNUSED_SYMBOL(iov_shorten); /* June 2006 */
/* A write operation does a read from user space and vice versa */
#define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 752cea12e30..f318b58510f 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -860,8 +860,12 @@ static int reiserfs_submit_file_region_for_write(struct reiserfs_transaction_han
// this sets the proper flags for O_SYNC to trigger a commit
mark_inode_dirty(inode);
reiserfs_write_unlock(inode->i_sb);
- } else
+ } else {
+ reiserfs_write_lock(inode->i_sb);
+ reiserfs_update_inode_transaction(inode);
mark_inode_dirty(inode);
+ reiserfs_write_unlock(inode->i_sb);
+ }
sd_update = 1;
}
diff --git a/fs/reiserfs/procfs.c b/fs/reiserfs/procfs.c
index 5d8a8cfebc7..c533ec1bcae 100644
--- a/fs/reiserfs/procfs.c
+++ b/fs/reiserfs/procfs.c
@@ -492,9 +492,17 @@ static void add_file(struct super_block *sb, char *name,
int reiserfs_proc_info_init(struct super_block *sb)
{
+ char b[BDEVNAME_SIZE];
+ char *s;
+
+ /* Some block devices use /'s */
+ strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
+ s = strchr(b, '/');
+ if (s)
+ *s = '!';
+
spin_lock_init(&__PINFO(sb).lock);
- REISERFS_SB(sb)->procdir =
- proc_mkdir(reiserfs_bdevname(sb), proc_info_root);
+ REISERFS_SB(sb)->procdir = proc_mkdir(b, proc_info_root);
if (REISERFS_SB(sb)->procdir) {
REISERFS_SB(sb)->procdir->owner = THIS_MODULE;
REISERFS_SB(sb)->procdir->data = sb;
@@ -508,13 +516,22 @@ int reiserfs_proc_info_init(struct super_block *sb)
return 0;
}
reiserfs_warning(sb, "reiserfs: cannot create /proc/%s/%s",
- proc_info_root_name, reiserfs_bdevname(sb));
+ proc_info_root_name, b);
return 1;
}
int reiserfs_proc_info_done(struct super_block *sb)
{
struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
+ char b[BDEVNAME_SIZE];
+ char *s;
+
+ /* Some block devices use /'s */
+ strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
+ s = strchr(b, '/');
+ if (s)
+ *s = '!';
+
if (de) {
remove_proc_entry("journal", de);
remove_proc_entry("oidmap", de);
@@ -528,7 +545,7 @@ int reiserfs_proc_info_done(struct super_block *sb)
__PINFO(sb).exiting = 1;
spin_unlock(&__PINFO(sb).lock);
if (proc_info_root) {
- remove_proc_entry(reiserfs_bdevname(sb), proc_info_root);
+ remove_proc_entry(b, proc_info_root);
REISERFS_SB(sb)->procdir = NULL;
}
return 0;
diff --git a/fs/splice.c b/fs/splice.c
index 05fd2787be9..684bca3d3a1 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1307,6 +1307,85 @@ asmlinkage long sys_splice(int fd_in, loff_t __user *off_in,
}
/*
+ * Make sure there's data to read. Wait for input if we can, otherwise
+ * return an appropriate error.
+ */
+static int link_ipipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
+{
+ int ret;
+
+ /*
+ * Check ->nrbufs without the inode lock first. This function
+ * is speculative anyways, so missing one is ok.
+ */
+ if (pipe->nrbufs)
+ return 0;
+
+ ret = 0;
+ mutex_lock(&pipe->inode->i_mutex);
+
+ while (!pipe->nrbufs) {
+ if (signal_pending(current)) {
+ ret = -ERESTARTSYS;
+ break;
+ }
+ if (!pipe->writers)
+ break;
+ if (!pipe->waiting_writers) {
+ if (flags & SPLICE_F_NONBLOCK) {
+ ret = -EAGAIN;
+ break;
+ }
+ }
+ pipe_wait(pipe);
+ }
+
+ mutex_unlock(&pipe->inode->i_mutex);
+ return ret;
+}
+
+/*
+ * Make sure there's writeable room. Wait for room if we can, otherwise
+ * return an appropriate error.
+ */
+static int link_opipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
+{
+ int ret;
+
+ /*
+ * Check ->nrbufs without the inode lock first. This function
+ * is speculative anyways, so missing one is ok.
+ */
+ if (pipe->nrbufs < PIPE_BUFFERS)
+ return 0;
+
+ ret = 0;
+ mutex_lock(&pipe->inode->i_mutex);
+
+ while (pipe->nrbufs >= PIPE_BUFFERS) {
+ if (!pipe->readers) {
+ send_sig(SIGPIPE, current, 0);
+ ret = -EPIPE;
+ break;
+ }
+ if (flags & SPLICE_F_NONBLOCK) {
+ ret = -EAGAIN;
+ break;
+ }
+ if (signal_pending(current)) {
+ ret = -ERESTARTSYS;
+ break;
+ }
+ pipe->waiting_writers++;
+ pipe_wait(pipe);
+ pipe->waiting_writers--;
+ }
+
+ mutex_unlock(&pipe->inode->i_mutex);
+ return ret;
+}
+
+/*
* Link contents of ipipe to opipe.
*/
static int link_pipe(struct pipe_inode_info *ipipe,
@@ -1314,9 +1393,7 @@ static int link_pipe(struct pipe_inode_info *ipipe,
size_t len, unsigned int flags)
{
struct pipe_buffer *ibuf, *obuf;
- int ret, do_wakeup, i, ipipe_first;
-
- ret = do_wakeup = ipipe_first = 0;
+ int ret = 0, i = 0, nbuf;
/*
* Potential ABBA deadlock, work around it by ordering lock
@@ -1324,126 +1401,62 @@ static int link_pipe(struct pipe_inode_info *ipipe,
* could deadlock (one doing tee from A -> B, the other from B -> A).
*/
if (ipipe->inode < opipe->inode) {
- ipipe_first = 1;
- mutex_lock(&ipipe->inode->i_mutex);
- mutex_lock(&opipe->inode->i_mutex);
+ mutex_lock_nested(&ipipe->inode->i_mutex, I_MUTEX_PARENT);
+ mutex_lock_nested(&opipe->inode->i_mutex, I_MUTEX_CHILD);
} else {
- mutex_lock(&opipe->inode->i_mutex);
- mutex_lock(&ipipe->inode->i_mutex);
+ mutex_lock_nested(&opipe->inode->i_mutex, I_MUTEX_PARENT);
+ mutex_lock_nested(&ipipe->inode->i_mutex, I_MUTEX_CHILD);
}
- for (i = 0;; i++) {
+ do {
if (!opipe->readers) {
send_sig(SIGPIPE, current, 0);
if (!ret)
ret = -EPIPE;
break;
}
- if (ipipe->nrbufs - i) {
- ibuf = ipipe->bufs + ((ipipe->curbuf + i) & (PIPE_BUFFERS - 1));
- /*
- * If we have room, fill this buffer
- */
- if (opipe->nrbufs < PIPE_BUFFERS) {
- int nbuf = (opipe->curbuf + opipe->nrbufs) & (PIPE_BUFFERS - 1);
-
- /*
- * Get a reference to this pipe buffer,
- * so we can copy the contents over.
- */
- ibuf->ops->get(ipipe, ibuf);
-
- obuf = opipe->bufs + nbuf;
- *obuf = *ibuf;
-
- /*
- * Don't inherit the gift flag, we need to
- * prevent multiple steals of this page.
- */
- obuf->flags &= ~PIPE_BUF_FLAG_GIFT;
-
- if (obuf->len > len)
- obuf->len = len;
-
- opipe->nrbufs++;
- do_wakeup = 1;
- ret += obuf->len;
- len -= obuf->len;
-
- if (!len)
- break;
- if (opipe->nrbufs < PIPE_BUFFERS)
- continue;
- }
-
- /*
- * We have input available, but no output room.
- * If we already copied data, return that. If we
- * need to drop the opipe lock, it must be ordered
- * last to avoid deadlocks.
- */
- if ((flags & SPLICE_F_NONBLOCK) || !ipipe_first) {
- if (!ret)
- ret = -EAGAIN;
- break;
- }
- if (signal_pending(current)) {
- if (!ret)
- ret = -ERESTARTSYS;
- break;
- }
- if (do_wakeup) {
- smp_mb();
- if (waitqueue_active(&opipe->wait))
- wake_up_interruptible(&opipe->wait);
- kill_fasync(&opipe->fasync_readers, SIGIO, POLL_IN);
- do_wakeup = 0;
- }
+ /*
+ * If we have iterated all input buffers or ran out of
+ * output room, break.
+ */
+ if (i >= ipipe->nrbufs || opipe->nrbufs >= PIPE_BUFFERS)
+ break;
- opipe->waiting_writers++;
- pipe_wait(opipe);
- opipe->waiting_writers--;
- continue;
- }
+ ibuf = ipipe->bufs + ((ipipe->curbuf + i) & (PIPE_BUFFERS - 1));
+ nbuf = (opipe->curbuf + opipe->nrbufs) & (PIPE_BUFFERS - 1);
/*
- * No input buffers, do the usual checks for available
- * writers and blocking and wait if necessary
+ * Get a reference to this pipe buffer,
+ * so we can copy the contents over.
*/
- if (!ipipe->writers)
- break;
- if (!ipipe->waiting_writers) {
- if (ret)
- break;
- }
+ ibuf->ops->get(ipipe, ibuf);
+
+ obuf = opipe->bufs + nbuf;
+ *obuf = *ibuf;
+
/*
- * pipe_wait() drops the ipipe mutex. To avoid deadlocks
- * with another process, we can only safely do that if
- * the ipipe lock is ordered last.
+ * Don't inherit the gift flag, we need to
+ * prevent multiple steals of this page.
*/
- if ((flags & SPLICE_F_NONBLOCK) || ipipe_first) {
- if (!ret)
- ret = -EAGAIN;
- break;
- }
- if (signal_pending(current)) {
- if (!ret)
- ret = -ERESTARTSYS;
- break;
- }
+ obuf->flags &= ~PIPE_BUF_FLAG_GIFT;
- if (waitqueue_active(&ipipe->wait))
- wake_up_interruptible_sync(&ipipe->wait);
- kill_fasync(&ipipe->fasync_writers, SIGIO, POLL_OUT);
+ if (obuf->len > len)
+ obuf->len = len;
- pipe_wait(ipipe);
- }
+ opipe->nrbufs++;
+ ret += obuf->len;
+ len -= obuf->len;
+ i++;
+ } while (len);
mutex_unlock(&ipipe->inode->i_mutex);
mutex_unlock(&opipe->inode->i_mutex);
- if (do_wakeup) {
+ /*
+ * If we put data in the output pipe, wakeup any potential readers.
+ */
+ if (ret > 0) {
smp_mb();
if (waitqueue_active(&opipe->wait))
wake_up_interruptible(&opipe->wait);
@@ -1464,14 +1477,29 @@ static long do_tee(struct file *in, struct file *out, size_t len,
{
struct pipe_inode_info *ipipe = in->f_dentry->d_inode->i_pipe;
struct pipe_inode_info *opipe = out->f_dentry->d_inode->i_pipe;
+ int ret = -EINVAL;
/*
- * Link ipipe to the two output pipes, consuming as we go along.
+ * Duplicate the contents of ipipe to opipe without actually
+ * copying the data.
*/
- if (ipipe && opipe)
- return link_pipe(ipipe, opipe, len, flags);
+ if (ipipe && opipe && ipipe != opipe) {
+ /*
+ * Keep going, unless we encounter an error. The ipipe/opipe
+ * ordering doesn't really matter.
+ */
+ ret = link_ipipe_prep(ipipe, flags);
+ if (!ret) {
+ ret = link_opipe_prep(opipe, flags);
+ if (!ret) {
+ ret = link_pipe(ipipe, opipe, len, flags);
+ if (!ret && (flags & SPLICE_F_NONBLOCK))
+ ret = -EAGAIN;
+ }
+ }
+ }
- return -EINVAL;
+ return ret;
}
asmlinkage long sys_tee(int fdin, int fdout, size_t len, unsigned int flags)
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 5e0e31cc46f..9889e54e1f1 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -109,6 +109,17 @@ static inline void set_inode_attr(struct inode * inode, struct iattr * iattr)
inode->i_ctime = iattr->ia_ctime;
}
+
+/*
+ * sysfs has a different i_mutex lock order behavior for i_mutex than other
+ * filesystems; sysfs i_mutex is called in many places with subsystem locks
+ * held. At the same time, many of the VFS locking rules do not apply to
+ * sysfs at all (cross directory rename for example). To untangle this mess
+ * (which gives false positives in lockdep), we're giving sysfs inodes their
+ * own class for i_mutex.
+ */
+static struct lock_class_key sysfs_inode_imutex_key;
+
struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent * sd)
{
struct inode * inode = new_inode(sysfs_sb);
@@ -118,6 +129,7 @@ struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent * sd)
inode->i_mapping->a_ops = &sysfs_aops;
inode->i_mapping->backing_dev_info = &sysfs_backing_dev_info;
inode->i_op = &sysfs_inode_operations;
+ lockdep_set_class(&inode->i_mutex, &sysfs_inode_imutex_key);
if (sd->s_iattr) {
/* sysfs_dirent has non-default attributes
diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h
index 8c021dc57d1..a13f75c1a93 100644
--- a/fs/xfs/linux-2.6/xfs_linux.h
+++ b/fs/xfs/linux-2.6/xfs_linux.h
@@ -215,7 +215,6 @@ BUFFER_FNS(PrivateStart, unwritten);
#define MIN(a,b) (min(a,b))
#define MAX(a,b) (max(a,b))
#define howmany(x, y) (((x)+((y)-1))/(y))
-#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
/*
* Various platform dependent calls that don't fit anywhere else
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-17 19:42:59 +0000