X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Fcompat.c;h=2ce4456aad309eebc3df3c200178561046d87093;hb=ec98c6b9b47df6df1c1fa6cf3d427414f8c2cf16;hp=06dad665b88fce8f412dc10303a527fefeb2278a;hpb=bd01f843c3368dcee735c19603251669f23f4477;p=safe%2Fjmp%2Flinux-2.6 diff --git a/fs/compat.c b/fs/compat.c index 06dad66..2ce4456 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -15,6 +15,7 @@ * published by the Free Software Foundation. */ +#include #include #include #include @@ -24,10 +25,8 @@ #include #include #include -#include #include #include -#include /* for SIOCDEVPRIVATE */ #include #include #include @@ -45,11 +44,12 @@ #include #include #include +#include #include +#include #include #include - -#include /* siocdevprivate_ioctl */ +#include #include #include @@ -78,30 +78,57 @@ int compat_printk(const char *fmt, ...) */ asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t) { - struct timeval tv[2]; + struct timespec tv[2]; if (t) { if (get_user(tv[0].tv_sec, &t->actime) || get_user(tv[1].tv_sec, &t->modtime)) return -EFAULT; - tv[0].tv_usec = 0; - tv[1].tv_usec = 0; + tv[0].tv_nsec = 0; + tv[1].tv_nsec = 0; + } + return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0); +} + +asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename, struct compat_timespec __user *t, int flags) +{ + struct timespec tv[2]; + + if (t) { + if (get_compat_timespec(&tv[0], &t[0]) || + get_compat_timespec(&tv[1], &t[1])) + return -EFAULT; + + if ((tv[0].tv_nsec == UTIME_OMIT || tv[0].tv_nsec == UTIME_NOW) + && tv[0].tv_sec != 0) + return -EINVAL; + if ((tv[1].tv_nsec == UTIME_OMIT || tv[1].tv_nsec == UTIME_NOW) + && tv[1].tv_sec != 0) + return -EINVAL; + + if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT) + return 0; } - return do_utimes(AT_FDCWD, filename, t ? tv : NULL); + return do_utimes(dfd, filename, t ? tv : NULL, flags); } asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t) { - struct timeval tv[2]; + struct timespec tv[2]; if (t) { if (get_user(tv[0].tv_sec, &t[0].tv_sec) || - get_user(tv[0].tv_usec, &t[0].tv_usec) || + get_user(tv[0].tv_nsec, &t[0].tv_usec) || get_user(tv[1].tv_sec, &t[1].tv_sec) || - get_user(tv[1].tv_usec, &t[1].tv_usec)) + get_user(tv[1].tv_nsec, &t[1].tv_usec)) return -EFAULT; + if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 || + tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0) + return -EINVAL; + tv[0].tv_nsec *= 1000; + tv[1].tv_nsec *= 1000; } - return do_utimes(dfd, filename, t ? tv : NULL); + return do_utimes(dfd, filename, t ? tv : NULL, 0); } asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t) @@ -214,10 +241,10 @@ asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs error = user_path_walk(path, &nd); if (!error) { struct kstatfs tmp; - error = vfs_statfs(nd.dentry, &tmp); + error = vfs_statfs(nd.path.dentry, &tmp); if (!error) error = put_compat_statfs(buf, &tmp); - path_release(&nd); + path_put(&nd.path); } return error; } @@ -232,7 +259,7 @@ asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user file = fget(fd); if (!file) goto out; - error = vfs_statfs(file->f_dentry, &tmp); + error = vfs_statfs(file->f_path.dentry, &tmp); if (!error) error = put_compat_statfs(buf, &tmp); fput(file); @@ -282,10 +309,10 @@ asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, s error = user_path_walk(path, &nd); if (!error) { struct kstatfs tmp; - error = vfs_statfs(nd.dentry, &tmp); + error = vfs_statfs(nd.path.dentry, &tmp); if (!error) error = put_compat_statfs64(buf, &tmp); - path_release(&nd); + path_put(&nd.path); } return error; } @@ -303,7 +330,7 @@ asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct c file = fget(fd); if (!file) goto out; - error = vfs_statfs(file->f_dentry, &tmp); + error = vfs_statfs(file->f_path.dentry, &tmp); if (!error) error = put_compat_statfs64(buf, &tmp); fput(file); @@ -311,162 +338,6 @@ out: return error; } -/* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */ - -#define IOCTL_HASHSIZE 256 -static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE]; - -static inline unsigned long ioctl32_hash(unsigned long cmd) -{ - return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE; -} - -static void ioctl32_insert_translation(struct ioctl_trans *trans) -{ - unsigned long hash; - struct ioctl_trans *t; - - hash = ioctl32_hash (trans->cmd); - if (!ioctl32_hash_table[hash]) - ioctl32_hash_table[hash] = trans; - else { - t = ioctl32_hash_table[hash]; - while (t->next) - t = t->next; - trans->next = NULL; - t->next = trans; - } -} - -static int __init init_sys32_ioctl(void) -{ - int i; - - for (i = 0; i < ioctl_table_size; i++) { - if (ioctl_start[i].next != 0) { - printk("ioctl translation %d bad\n",i); - return -1; - } - - ioctl32_insert_translation(&ioctl_start[i]); - } - return 0; -} - -__initcall(init_sys32_ioctl); - -static void compat_ioctl_error(struct file *filp, unsigned int fd, - unsigned int cmd, unsigned long arg) -{ - char buf[10]; - char *fn = "?"; - char *path; - - /* find the name of the device. */ - path = (char *)__get_free_page(GFP_KERNEL); - if (path) { - fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE); - if (IS_ERR(fn)) - fn = "?"; - } - - sprintf(buf,"'%c'", (cmd>>24) & 0x3f); - if (!isprint(buf[1])) - sprintf(buf, "%02x", buf[1]); - compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) " - "cmd(%08x){%s} arg(%08x) on %s\n", - current->comm, current->pid, - (int)fd, (unsigned int)cmd, buf, - (unsigned int)arg, fn); - - if (path) - free_page((unsigned long)path); -} - -asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, - unsigned long arg) -{ - struct file *filp; - int error = -EBADF; - struct ioctl_trans *t; - int fput_needed; - - filp = fget_light(fd, &fput_needed); - if (!filp) - goto out; - - /* RED-PEN how should LSM module know it's handling 32bit? */ - error = security_file_ioctl(filp, cmd, arg); - if (error) - goto out_fput; - - /* - * To allow the compat_ioctl handlers to be self contained - * we need to check the common ioctls here first. - * Just handle them with the standard handlers below. - */ - switch (cmd) { - case FIOCLEX: - case FIONCLEX: - case FIONBIO: - case FIOASYNC: - case FIOQSIZE: - break; - - case FIBMAP: - case FIGETBSZ: - case FIONREAD: - if (S_ISREG(filp->f_dentry->d_inode->i_mode)) - break; - /*FALL THROUGH*/ - - default: - if (filp->f_op && filp->f_op->compat_ioctl) { - error = filp->f_op->compat_ioctl(filp, cmd, arg); - if (error != -ENOIOCTLCMD) - goto out_fput; - } - - if (!filp->f_op || - (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl)) - goto do_ioctl; - break; - } - - for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) { - if (t->cmd == cmd) - goto found_handler; - } - - if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) && - cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { - error = siocdevprivate_ioctl(fd, cmd, arg); - } else { - static int count; - - if (++count <= 50) - compat_ioctl_error(filp, fd, cmd, arg); - error = -EINVAL; - } - - goto out_fput; - - found_handler: - if (t->handler) { - lock_kernel(); - error = t->handler(fd, cmd, arg, filp); - unlock_kernel(); - goto out_fput; - } - - do_ioctl: - error = vfs_ioctl(filp, fd, cmd, arg); - out_fput: - fput_light(filp, fput_needed); - out: - return error; -} - static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) { if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || @@ -831,9 +702,6 @@ static int do_nfs4_super_data_conv(void *raw_data) real->flags = raw->flags; real->version = raw->version; } - else { - return -EINVAL; - } return 0; } @@ -871,7 +739,7 @@ asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, retval = -EINVAL; - if (type_page) { + if (type_page && data_page) { if (!strcmp((char *)type_page, SMBFS_NAME)) { do_smb_super_data_conv((void *)data_page); } else if (!strcmp((char *)type_page, NCPFS_NAME)) { @@ -900,8 +768,6 @@ asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, } #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) -#define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \ - ~(sizeof(compat_long_t)-1)) struct compat_old_linux_dirent { compat_ulong_t d_ino; @@ -989,7 +855,7 @@ static int compat_filldir(void *__buf, const char *name, int namlen, struct compat_linux_dirent __user * dirent; struct compat_getdents_callback *buf = __buf; compat_ulong_t d_ino; - int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2); + int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t)); buf->error = -EINVAL; /* only used if we fail.. */ if (reclen > buf->count) @@ -1064,7 +930,6 @@ out: } #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 -#define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1)) struct compat_getdents_callback64 { struct linux_dirent64 __user *current_dir; @@ -1079,7 +944,7 @@ static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t struct linux_dirent64 __user *dirent; struct compat_getdents_callback64 *buf = __buf; int jj = NAME_OFFSET(dirent); - int reclen = COMPAT_ROUND_UP64(jj + namlen + 1); + int reclen = ALIGN(jj + namlen + 1, sizeof(u64)); u64 off; buf->error = -EINVAL; /* only used if we fail.. */ @@ -1144,7 +1009,9 @@ asmlinkage long compat_sys_getdents64(unsigned int fd, lastdirent = buf.previous; if (lastdirent) { typeof(lastdirent->d_off) d_off = file->f_pos; - __put_user_unaligned(d_off, &lastdirent->d_off); + error = -EFAULT; + if (__put_user_unaligned(d_off, &lastdirent->d_off)) + goto out_putf; error = count - buf.count; } @@ -1234,10 +1101,6 @@ static ssize_t compat_do_readv_writev(int type, struct file *file, if (ret < 0) goto out; - ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE); - if (ret) - goto out; - fnv = NULL; if (type == READ) { fn = file->f_op->read; @@ -1257,7 +1120,7 @@ out: if (iov != iovstack) kfree(iov); if ((ret + (type == READ)) > 0) { - struct dentry *dentry = file->f_dentry; + struct dentry *dentry = file->f_path.dentry; if (type == READ) fsnotify_access(dentry); else @@ -1387,6 +1250,7 @@ static int compat_copy_strings(int argc, compat_uptr_t __user *argv, { struct page *kmapped_page = NULL; char *kaddr = NULL; + unsigned long kpos = 0; int ret; while (argc-- > 0) { @@ -1395,92 +1259,84 @@ static int compat_copy_strings(int argc, compat_uptr_t __user *argv, unsigned long pos; if (get_user(str, argv+argc) || - !(len = strnlen_user(compat_ptr(str), bprm->p))) { + !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) { ret = -EFAULT; goto out; } - if (bprm->p < len) { + if (len > MAX_ARG_STRLEN) { ret = -E2BIG; goto out; } - bprm->p -= len; - /* XXX: add architecture specific overflow check here. */ + /* We're going to work our way backwords. */ pos = bprm->p; + str += len; + bprm->p -= len; while (len > 0) { - int i, new, err; int offset, bytes_to_copy; - struct page *page; offset = pos % PAGE_SIZE; - i = pos/PAGE_SIZE; - page = bprm->page[i]; - new = 0; - if (!page) { - page = alloc_page(GFP_HIGHUSER); - bprm->page[i] = page; - if (!page) { - ret = -ENOMEM; + if (offset == 0) + offset = PAGE_SIZE; + + bytes_to_copy = offset; + if (bytes_to_copy > len) + bytes_to_copy = len; + + offset -= bytes_to_copy; + pos -= bytes_to_copy; + str -= bytes_to_copy; + len -= bytes_to_copy; + + if (!kmapped_page || kpos != (pos & PAGE_MASK)) { + struct page *page; + +#ifdef CONFIG_STACK_GROWSUP + ret = expand_stack_downwards(bprm->vma, pos); + if (ret < 0) { + /* We've exceed the stack rlimit. */ + ret = -E2BIG; + goto out; + } +#endif + ret = get_user_pages(current, bprm->mm, pos, + 1, 1, 1, &page, NULL); + if (ret <= 0) { + /* We've exceed the stack rlimit. */ + ret = -E2BIG; goto out; } - new = 1; - } - if (page != kmapped_page) { - if (kmapped_page) + if (kmapped_page) { + flush_kernel_dcache_page(kmapped_page); kunmap(kmapped_page); + put_page(kmapped_page); + } kmapped_page = page; kaddr = kmap(kmapped_page); + kpos = pos & PAGE_MASK; + flush_cache_page(bprm->vma, kpos, + page_to_pfn(kmapped_page)); } - if (new && offset) - memset(kaddr, 0, offset); - bytes_to_copy = PAGE_SIZE - offset; - if (bytes_to_copy > len) { - bytes_to_copy = len; - if (new) - memset(kaddr+offset+len, 0, - PAGE_SIZE-offset-len); - } - err = copy_from_user(kaddr+offset, compat_ptr(str), - bytes_to_copy); - if (err) { + if (copy_from_user(kaddr+offset, compat_ptr(str), + bytes_to_copy)) { ret = -EFAULT; goto out; } - - pos += bytes_to_copy; - str += bytes_to_copy; - len -= bytes_to_copy; } } ret = 0; out: - if (kmapped_page) + if (kmapped_page) { + flush_kernel_dcache_page(kmapped_page); kunmap(kmapped_page); - return ret; -} - -#ifdef CONFIG_MMU - -#define free_arg_pages(bprm) do { } while (0) - -#else - -static inline void free_arg_pages(struct linux_binprm *bprm) -{ - int i; - - for (i = 0; i < MAX_ARG_PAGES; i++) { - if (bprm->page[i]) - __free_page(bprm->page[i]); - bprm->page[i] = NULL; + put_page(kmapped_page); } + return ret; } -#endif /* CONFIG_MMU */ - /* * compat_do_execve() is mostly a copy of do_execve(), with the exception * that it processes 32 bit argv and envp pointers. @@ -1493,7 +1349,6 @@ int compat_do_execve(char * filename, struct linux_binprm *bprm; struct file *file; int retval; - int i; retval = -ENOMEM; bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); @@ -1507,24 +1362,19 @@ int compat_do_execve(char * filename, sched_exec(); - bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *); bprm->file = file; bprm->filename = filename; bprm->interp = filename; - bprm->mm = mm_alloc(); - retval = -ENOMEM; - if (!bprm->mm) - goto out_file; - retval = init_new_context(current, bprm->mm); - if (retval < 0) - goto out_mm; + retval = bprm_mm_init(bprm); + if (retval) + goto out_file; - bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t)); + bprm->argc = compat_count(argv, MAX_ARG_STRINGS); if ((retval = bprm->argc) < 0) goto out_mm; - bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t)); + bprm->envc = compat_count(envp, MAX_ARG_STRINGS); if ((retval = bprm->envc) < 0) goto out_mm; @@ -1551,8 +1401,6 @@ int compat_do_execve(char * filename, retval = search_binary_handler(bprm, regs); if (retval >= 0) { - free_arg_pages(bprm); - /* execve success */ security_bprm_free(bprm); acct_update_integrals(current); @@ -1561,19 +1409,12 @@ int compat_do_execve(char * filename, } out: - /* Something went wrong, return the inode and free the argument pages*/ - for (i = 0 ; i < MAX_ARG_PAGES ; i++) { - struct page * page = bprm->page[i]; - if (page) - __free_page(page); - } - if (bprm->security) security_bprm_free(bprm); out_mm: if (bprm->mm) - mmdrop(bprm->mm); + mmput(bprm->mm); out_file: if (bprm->file) { @@ -1590,8 +1431,6 @@ out_ret: #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) -#define ROUND_UP(x,y) (((x)+(y)-1)/(y)) - /* * Ooo, nasty. We need here to frob 32-bit unsigned longs to * 64-bit unsigned longs. @@ -1600,7 +1439,7 @@ static int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, unsigned long *fdset) { - nr = ROUND_UP(nr, __COMPAT_NFDBITS); + nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); if (ufdset) { unsigned long odd; @@ -1611,14 +1450,14 @@ int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, nr &= ~1UL; while (nr) { unsigned long h, l; - __get_user(l, ufdset); - __get_user(h, ufdset+1); + if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) + return -EFAULT; ufdset += 2; *fdset++ = h << 32 | l; nr -= 2; } - if (odd) - __get_user(*fdset, ufdset); + if (odd && __get_user(*fdset, ufdset)) + return -EFAULT; } else { /* Tricky, must clear full unsigned long in the * kernel fdset at the end, this makes sure that @@ -1630,14 +1469,14 @@ int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, } static -void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, - unsigned long *fdset) +int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, + unsigned long *fdset) { unsigned long odd; - nr = ROUND_UP(nr, __COMPAT_NFDBITS); + nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); if (!ufdset) - return; + return 0; odd = nr & 1UL; nr &= ~1UL; @@ -1645,13 +1484,14 @@ void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, unsigned long h, l; l = *fdset++; h = l >> 32; - __put_user(l, ufdset); - __put_user(h, ufdset+1); + if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) + return -EFAULT; ufdset += 2; nr -= 2; } - if (odd) - __put_user(*fdset, ufdset); + if (odd && __put_user(*fdset, ufdset)) + return -EFAULT; + return 0; } @@ -1675,31 +1515,35 @@ int compat_core_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout) { fd_set_bits fds; - char *bits; - int size, max_fdset, ret = -EINVAL; + void *bits; + int size, max_fds, ret = -EINVAL; struct fdtable *fdt; + long stack_fds[SELECT_STACK_ALLOC/sizeof(long)]; if (n < 0) goto out_nofds; - /* max_fdset can increase, so grab it once to avoid race */ + /* max_fds can increase, so grab it once to avoid race */ rcu_read_lock(); fdt = files_fdtable(current->files); - max_fdset = fdt->max_fdset; + max_fds = fdt->max_fds; rcu_read_unlock(); - if (n > max_fdset) - n = max_fdset; + if (n > max_fds) + n = max_fds; /* * We need 6 bitmaps (in/out/ex for both incoming and outgoing), * since we used fdset we need to allocate memory in units of * long-words. */ - ret = -ENOMEM; size = FDS_BYTES(n); - bits = kmalloc(6 * size, GFP_KERNEL); - if (!bits) - goto out_nofds; + bits = stack_fds; + if (size > sizeof(stack_fds) / 6) { + bits = kmalloc(6 * size, GFP_KERNEL); + ret = -ENOMEM; + if (!bits) + goto out_nofds; + } fds.in = (unsigned long *) bits; fds.out = (unsigned long *) (bits + size); fds.ex = (unsigned long *) (bits + 2*size); @@ -1726,12 +1570,13 @@ int compat_core_sys_select(int n, compat_ulong_t __user *inp, ret = 0; } - compat_set_fd_set(n, inp, fds.res_in); - compat_set_fd_set(n, outp, fds.res_out); - compat_set_fd_set(n, exp, fds.res_ex); - + if (compat_set_fd_set(n, inp, fds.res_in) || + compat_set_fd_set(n, outp, fds.res_out) || + compat_set_fd_set(n, exp, fds.res_ex)) + ret = -EFAULT; out: - kfree(bits); + if (bits != stack_fds) + kfree(bits); out_nofds: return ret; } @@ -1755,7 +1600,7 @@ asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS) timeout = -1; /* infinite */ else { - timeout = ROUND_UP(tv.tv_usec, 1000000/HZ); + timeout = DIV_ROUND_UP(tv.tv_usec, 1000000/HZ); timeout += tv.tv_sec * HZ; } } @@ -1823,7 +1668,7 @@ asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp, do { if (tsp) { if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) { - timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ); + timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ); timeout += ts.tv_sec * (unsigned long)HZ; ts.tv_sec = 0; ts.tv_nsec = 0; @@ -1919,7 +1764,7 @@ asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, /* We assume that ts.tv_sec is always lower than the number of seconds that can be expressed in an s64. Otherwise the compiler bitches at us */ - timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ); + timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ); timeout += ts.tv_sec * HZ; } @@ -2232,3 +2077,118 @@ long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) return sys_ni_syscall(); } #endif + +#ifdef CONFIG_EPOLL + +#ifdef TIF_RESTORE_SIGMASK +asmlinkage long compat_sys_epoll_pwait(int epfd, + struct compat_epoll_event __user *events, + int maxevents, int timeout, + const compat_sigset_t __user *sigmask, + compat_size_t sigsetsize) +{ + long err; + compat_sigset_t csigmask; + sigset_t ksigmask, sigsaved; + + /* + * If the caller wants a certain signal mask to be set during the wait, + * we apply it here. + */ + if (sigmask) { + if (sigsetsize != sizeof(compat_sigset_t)) + return -EINVAL; + if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) + return -EFAULT; + sigset_from_compat(&ksigmask, &csigmask); + sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); + sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); + } + + err = sys_epoll_wait(epfd, events, maxevents, timeout); + + /* + * If we changed the signal mask, we need to restore the original one. + * In case we've got a signal while waiting, we do not restore the + * signal mask yet, and we allow do_signal() to deliver the signal on + * the way back to userspace, before the signal mask is restored. + */ + if (sigmask) { + if (err == -EINTR) { + memcpy(¤t->saved_sigmask, &sigsaved, + sizeof(sigsaved)); + set_thread_flag(TIF_RESTORE_SIGMASK); + } else + sigprocmask(SIG_SETMASK, &sigsaved, NULL); + } + + return err; +} +#endif /* TIF_RESTORE_SIGMASK */ + +#endif /* CONFIG_EPOLL */ + +#ifdef CONFIG_SIGNALFD + +asmlinkage long compat_sys_signalfd(int ufd, + const compat_sigset_t __user *sigmask, + compat_size_t sigsetsize) +{ + compat_sigset_t ss32; + sigset_t tmp; + sigset_t __user *ksigmask; + + if (sigsetsize != sizeof(compat_sigset_t)) + return -EINVAL; + if (copy_from_user(&ss32, sigmask, sizeof(ss32))) + return -EFAULT; + sigset_from_compat(&tmp, &ss32); + ksigmask = compat_alloc_user_space(sizeof(sigset_t)); + if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t))) + return -EFAULT; + + return sys_signalfd(ufd, ksigmask, sizeof(sigset_t)); +} + +#endif /* CONFIG_SIGNALFD */ + +#ifdef CONFIG_TIMERFD + +asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, + const struct compat_itimerspec __user *utmr, + struct compat_itimerspec __user *otmr) +{ + int error; + struct itimerspec t; + struct itimerspec __user *ut; + + if (get_compat_itimerspec(&t, utmr)) + return -EFAULT; + ut = compat_alloc_user_space(2 * sizeof(struct itimerspec)); + if (copy_to_user(&ut[0], &t, sizeof(t))) + return -EFAULT; + error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]); + if (!error && otmr) + error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) || + put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; + + return error; +} + +asmlinkage long compat_sys_timerfd_gettime(int ufd, + struct compat_itimerspec __user *otmr) +{ + int error; + struct itimerspec t; + struct itimerspec __user *ut; + + ut = compat_alloc_user_space(sizeof(struct itimerspec)); + error = sys_timerfd_gettime(ufd, ut); + if (!error) + error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) || + put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; + + return error; +} + +#endif /* CONFIG_TIMERFD */