diff options
Diffstat (limited to 'fs/read_write.c')
| -rw-r--r-- | fs/read_write.c | 34 |
1 files changed, 13 insertions, 21 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index 64dc24afdb3a..ef3ee3725714 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -386,8 +386,8 @@ EXPORT_SYMBOL(vfs_llseek); static off_t ksys_lseek(unsigned int fd, off_t offset, unsigned int whence) { off_t retval; - struct fd f = fdget_pos(fd); - if (!fd_file(f)) + CLASS(fd_pos, f)(fd); + if (fd_empty(f)) return -EBADF; retval = -EINVAL; @@ -397,7 +397,6 @@ static off_t ksys_lseek(unsigned int fd, off_t offset, unsigned int whence) if (res != (loff_t)retval) retval = -EOVERFLOW; /* LFS: should only happen on 32 bit platforms */ } - fdput_pos(f); return retval; } @@ -420,15 +419,14 @@ SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high, unsigned int, whence) { int retval; - struct fd f = fdget_pos(fd); + CLASS(fd_pos, f)(fd); loff_t offset; - if (!fd_file(f)) + if (fd_empty(f)) return -EBADF; - retval = -EINVAL; if (whence > SEEK_MAX) - goto out_putf; + return -EINVAL; offset = vfs_llseek(fd_file(f), ((loff_t) offset_high << 32) | offset_low, whence); @@ -439,8 +437,6 @@ SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high, if (!copy_to_user(result, &offset, sizeof(offset))) retval = 0; } -out_putf: - fdput_pos(f); return retval; } #endif @@ -700,10 +696,10 @@ static inline loff_t *file_ppos(struct file *file) ssize_t ksys_read(unsigned int fd, char __user *buf, size_t count) { - struct fd f = fdget_pos(fd); + CLASS(fd_pos, f)(fd); ssize_t ret = -EBADF; - if (fd_file(f)) { + if (!fd_empty(f)) { loff_t pos, *ppos = file_ppos(fd_file(f)); if (ppos) { pos = *ppos; @@ -712,7 +708,6 @@ ssize_t ksys_read(unsigned int fd, char __user *buf, size_t count) ret = vfs_read(fd_file(f), buf, count, ppos); if (ret >= 0 && ppos) fd_file(f)->f_pos = pos; - fdput_pos(f); } return ret; } @@ -724,10 +719,10 @@ SYSCALL_DEFINE3(read, unsigned int, fd, char __user *, buf, size_t, count) ssize_t ksys_write(unsigned int fd, const char __user *buf, size_t count) { - struct fd f = fdget_pos(fd); + CLASS(fd_pos, f)(fd); ssize_t ret = -EBADF; - if (fd_file(f)) { + if (!fd_empty(f)) { loff_t pos, *ppos = file_ppos(fd_file(f)); if (ppos) { pos = *ppos; @@ -736,7 +731,6 @@ ssize_t ksys_write(unsigned int fd, const char __user *buf, size_t count) ret = vfs_write(fd_file(f), buf, count, ppos); if (ret >= 0 && ppos) fd_file(f)->f_pos = pos; - fdput_pos(f); } return ret; @@ -1075,10 +1069,10 @@ out: static ssize_t do_readv(unsigned long fd, const struct iovec __user *vec, unsigned long vlen, rwf_t flags) { - struct fd f = fdget_pos(fd); + CLASS(fd_pos, f)(fd); ssize_t ret = -EBADF; - if (fd_file(f)) { + if (!fd_empty(f)) { loff_t pos, *ppos = file_ppos(fd_file(f)); if (ppos) { pos = *ppos; @@ -1087,7 +1081,6 @@ static ssize_t do_readv(unsigned long fd, const struct iovec __user *vec, ret = vfs_readv(fd_file(f), vec, vlen, ppos, flags); if (ret >= 0 && ppos) fd_file(f)->f_pos = pos; - fdput_pos(f); } if (ret > 0) @@ -1099,10 +1092,10 @@ static ssize_t do_readv(unsigned long fd, const struct iovec __user *vec, static ssize_t do_writev(unsigned long fd, const struct iovec __user *vec, unsigned long vlen, rwf_t flags) { - struct fd f = fdget_pos(fd); + CLASS(fd_pos, f)(fd); ssize_t ret = -EBADF; - if (fd_file(f)) { + if (!fd_empty(f)) { loff_t pos, *ppos = file_ppos(fd_file(f)); if (ppos) { pos = *ppos; @@ -1111,7 +1104,6 @@ static ssize_t do_writev(unsigned long fd, const struct iovec __user *vec, ret = vfs_writev(fd_file(f), vec, vlen, ppos, flags); if (ret >= 0 && ppos) fd_file(f)->f_pos = pos; - fdput_pos(f); } if (ret > 0) |