#include "spufs.h"
-struct spufs_ctx_info {
- struct list_head list;
- int dfd;
- int memsize; /* in bytes */
- struct spu_context *ctx;
-};
-
-static LIST_HEAD(ctx_info_list);
-
-static ssize_t do_coredump_read(int num, struct spu_context *ctx, void __user *buffer,
+static ssize_t do_coredump_read(int num, struct spu_context *ctx, void *buffer,
size_t size, loff_t *off)
{
u64 data;
return spufs_coredump_read[num].read(ctx, buffer, size, off);
data = spufs_coredump_read[num].get(ctx);
- ret = copy_to_user(buffer, &data, 8);
- return ret ? -EFAULT : 8;
+ ret = snprintf(buffer, size, "0x%.16lx", data);
+ if (ret >= size)
+ return size;
+ return ++ret; /* count trailing NULL */
}
/*
* 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 spufs_dump_write(struct file *file, const void *addr, int nr)
+static int spufs_dump_write(struct file *file, const void *addr, int nr, loff_t *foffset)
{
- return file->f_op->write(file, addr, nr, &file->f_pos) == nr;
-}
+ unsigned long limit = current->signal->rlim[RLIMIT_CORE].rlim_cur;
+ ssize_t written;
-static int spufs_dump_seek(struct file *file, loff_t off)
-{
- if (file->f_op->llseek) {
- if (file->f_op->llseek(file, off, 0) != off)
- return 0;
- } else
- file->f_pos = off;
- return 1;
+ if (*foffset + nr > limit)
+ return -EIO;
+
+ written = file->f_op->write(file, addr, nr, &file->f_pos);
+ *foffset += written;
+
+ if (written != nr)
+ return -EIO;
+
+ return 0;
}
-static void spufs_fill_memsize(struct spufs_ctx_info *ctx_info)
+static int spufs_dump_align(struct file *file, char *buf, loff_t new_off,
+ loff_t *foffset)
{
- struct spu_context *ctx;
- unsigned long long lslr;
+ int rc, size;
- ctx = ctx_info->ctx;
- lslr = ctx->csa.priv2.spu_lslr_RW;
- ctx_info->memsize = lslr + 1;
+ size = min((loff_t)PAGE_SIZE, new_off - *foffset);
+ memset(buf, 0, size);
+
+ rc = 0;
+ while (rc == 0 && new_off > *foffset) {
+ size = min((loff_t)PAGE_SIZE, new_off - *foffset);
+ rc = spufs_dump_write(file, buf, size, foffset);
+ }
+
+ return rc;
}
-static int spufs_ctx_note_size(struct spufs_ctx_info *ctx_info)
+static int spufs_ctx_note_size(struct spu_context *ctx, int dfd)
{
- int dfd, memsize, i, sz, total = 0;
+ int i, sz, total = 0;
char *name;
char fullname[80];
- dfd = ctx_info->dfd;
- memsize = ctx_info->memsize;
-
- for (i = 0; spufs_coredump_read[i].name; i++) {
+ for (i = 0; spufs_coredump_read[i].name != NULL; i++) {
name = spufs_coredump_read[i].name;
sz = spufs_coredump_read[i].size;
total += sizeof(struct elf_note);
total += roundup(strlen(fullname) + 1, 4);
- if (!strcmp(name, "mem"))
- total += roundup(memsize, 4);
- else
- total += roundup(sz, 4);
+ total += roundup(sz, 4);
}
return total;
}
-static int spufs_add_one_context(struct file *file, int dfd)
-{
- struct spu_context *ctx;
- struct spufs_ctx_info *ctx_info;
- int size;
-
- ctx = SPUFS_I(file->f_dentry->d_inode)->i_ctx;
- if (ctx->flags & SPU_CREATE_NOSCHED)
- return 0;
-
- ctx_info = kzalloc(sizeof(*ctx_info), GFP_KERNEL);
- if (unlikely(!ctx_info))
- return -ENOMEM;
-
- ctx_info->dfd = dfd;
- ctx_info->ctx = ctx;
-
- spufs_fill_memsize(ctx_info);
-
- size = spufs_ctx_note_size(ctx_info);
- list_add(&ctx_info->list, &ctx_info_list);
- return size;
-}
-
/*
* The additional architecture-specific notes for Cell are various
* context files in the spu context.
* internal functionality to dump them without needing to actually
* open the files.
*/
-static int spufs_arch_notes_size(void)
+static struct spu_context *coredump_next_context(int *fd)
{
struct fdtable *fdt = files_fdtable(current->files);
- int size = 0, fd;
+ struct file *file;
+ struct spu_context *ctx = NULL;
- for (fd = 0; fd < fdt->max_fds; fd++) {
- if (FD_ISSET(fd, fdt->open_fds)) {
- struct file *file = fcheck(fd);
+ for (; *fd < fdt->max_fds; (*fd)++) {
+ if (!FD_ISSET(*fd, fdt->open_fds))
+ continue;
- if (file && file->f_op == &spufs_context_fops) {
- int rval = spufs_add_one_context(file, fd);
- if (rval < 0)
- break;
- size += rval;
- }
- }
+ file = fcheck(*fd);
+
+ if (!file || file->f_op != &spufs_context_fops)
+ continue;
+
+ ctx = SPUFS_I(file->f_dentry->d_inode)->i_ctx;
+ if (ctx->flags & SPU_CREATE_NOSCHED)
+ continue;
+
+ break;
}
- return size;
+ return ctx;
}
-static void spufs_arch_write_note(struct spufs_ctx_info *ctx_info, int i,
- struct file *file)
+int spufs_coredump_extra_notes_size(void)
{
struct spu_context *ctx;
+ int size = 0, rc, fd;
+
+ fd = 0;
+ while ((ctx = coredump_next_context(&fd)) != NULL) {
+ rc = spu_acquire_saved(ctx);
+ if (rc)
+ break;
+ rc = spufs_ctx_note_size(ctx, fd);
+ spu_release_saved(ctx);
+ if (rc < 0)
+ break;
+
+ size += rc;
+
+ /* start searching the next fd next time */
+ fd++;
+ }
+
+ return size;
+}
+
+static int spufs_arch_write_note(struct spu_context *ctx, int i,
+ struct file *file, int dfd, loff_t *foffset)
+{
loff_t pos = 0;
- int sz, dfd, rc, total = 0;
+ int sz, rc, nread, total = 0;
const int bufsz = PAGE_SIZE;
char *name;
char fullname[80], *buf;
buf = (void *)get_zeroed_page(GFP_KERNEL);
if (!buf)
- return;
+ return -ENOMEM;
- dfd = ctx_info->dfd;
name = spufs_coredump_read[i].name;
-
- if (!strcmp(name, "mem"))
- sz = ctx_info->memsize;
- else
- sz = spufs_coredump_read[i].size;
-
- ctx = ctx_info->ctx;
- if (!ctx)
- goto out;
+ sz = spufs_coredump_read[i].size;
sprintf(fullname, "SPU/%d/%s", dfd, name);
en.n_namesz = strlen(fullname) + 1;
en.n_descsz = sz;
en.n_type = NT_SPU;
- if (!spufs_dump_write(file, &en, sizeof(en)))
+ rc = spufs_dump_write(file, &en, sizeof(en), foffset);
+ if (rc)
goto out;
- if (!spufs_dump_write(file, fullname, en.n_namesz))
+
+ rc = spufs_dump_write(file, fullname, en.n_namesz, foffset);
+ if (rc)
goto out;
- if (!spufs_dump_seek(file, roundup((unsigned long)file->f_pos, 4)))
+
+ rc = spufs_dump_align(file, buf, roundup(*foffset, 4), foffset);
+ if (rc)
goto out;
do {
- rc = do_coredump_read(i, ctx, buf, bufsz, &pos);
- if (rc > 0) {
- if (!spufs_dump_write(file, buf, rc))
+ nread = do_coredump_read(i, ctx, buf, bufsz, &pos);
+ if (nread > 0) {
+ rc = spufs_dump_write(file, buf, nread, foffset);
+ if (rc)
goto out;
- total += rc;
+ total += nread;
}
- } while (rc == bufsz && total < sz);
+ } while (nread == bufsz && total < sz);
+
+ if (nread < 0) {
+ rc = nread;
+ goto out;
+ }
+
+ rc = spufs_dump_align(file, buf, roundup(*foffset - total + sz, 4),
+ foffset);
- spufs_dump_seek(file, roundup((unsigned long)file->f_pos
- - total + sz, 4));
out:
free_page((unsigned long)buf);
+ return rc;
}
-static void spufs_arch_write_notes(struct file *file)
+int spufs_coredump_extra_notes_write(struct file *file, loff_t *foffset)
{
- int j;
- struct spufs_ctx_info *ctx_info, *next;
-
- list_for_each_entry_safe(ctx_info, next, &ctx_info_list, list) {
- spu_acquire_saved(ctx_info->ctx);
- for (j = 0; j < spufs_coredump_num_notes; j++)
- spufs_arch_write_note(ctx_info, j, file);
- spu_release(ctx_info->ctx);
- list_del(&ctx_info->list);
- kfree(ctx_info);
+ struct spu_context *ctx;
+ int fd, j, rc;
+
+ fd = 0;
+ while ((ctx = coredump_next_context(&fd)) != NULL) {
+ rc = spu_acquire_saved(ctx);
+ if (rc)
+ return rc;
+
+ for (j = 0; spufs_coredump_read[j].name != NULL; j++) {
+ rc = spufs_arch_write_note(ctx, j, file, fd, foffset);
+ if (rc) {
+ spu_release_saved(ctx);
+ return rc;
+ }
+ }
+
+ spu_release_saved(ctx);
+
+ /* start searching the next fd next time */
+ fd++;
}
-}
-struct spu_coredump_calls spufs_coredump_calls = {
- .arch_notes_size = spufs_arch_notes_size,
- .arch_write_notes = spufs_arch_write_notes,
- .owner = THIS_MODULE,
-};
+ return 0;
+}
projects / linux-2.6 / blobdiff