Lines Matching full:file
12 #include <linux/file.h>
37 static inline bool unsigned_offsets(struct file *file) in unsigned_offsets() argument
39 return file->f_mode & FMODE_UNSIGNED_OFFSET; in unsigned_offsets()
43 * vfs_setpos - update the file offset for lseek
44 * @file: file structure in question
45 * @offset: file offset to seek to
46 * @maxsize: maximum file size
48 * This is a low-level filesystem helper for updating the file offset to
50 * not equal to the current file offset.
54 loff_t vfs_setpos(struct file *file, loff_t offset, loff_t maxsize) in vfs_setpos() argument
56 if (offset < 0 && !unsigned_offsets(file)) in vfs_setpos()
61 if (offset != file->f_pos) { in vfs_setpos()
62 file->f_pos = offset; in vfs_setpos()
63 file->f_version = 0; in vfs_setpos()
71 * @file: file structure to seek on
72 * @offset: file offset to seek to
74 * @size: max size of this file in file system
78 * maximum file size and a custom EOF position, for e.g. hashed directories
86 generic_file_llseek_size(struct file *file, loff_t offset, int whence, in generic_file_llseek_size() argument
97 * f_pos value back to the file because a concurrent read(), in generic_file_llseek_size()
101 return file->f_pos; in generic_file_llseek_size()
107 spin_lock(&file->f_lock); in generic_file_llseek_size()
108 offset = vfs_setpos(file, file->f_pos + offset, maxsize); in generic_file_llseek_size()
109 spin_unlock(&file->f_lock); in generic_file_llseek_size()
113 * In the generic case the entire file is data, so as long as in generic_file_llseek_size()
114 * offset isn't at the end of the file then the offset is data. in generic_file_llseek_size()
121 * There is a virtual hole at the end of the file, so as long as in generic_file_llseek_size()
130 return vfs_setpos(file, offset, maxsize); in generic_file_llseek_size()
136 * @file: file structure to seek on
137 * @offset: file offset to seek to
141 * filesystems. It just updates the file offset to the value specified by
144 loff_t generic_file_llseek(struct file *file, loff_t offset, int whence) in generic_file_llseek() argument
146 struct inode *inode = file->f_mapping->host; in generic_file_llseek()
148 return generic_file_llseek_size(file, offset, whence, in generic_file_llseek()
156 * @file: file structure to seek on
157 * @offset: file offset to seek to
159 * @size: size of the file
162 loff_t fixed_size_llseek(struct file *file, loff_t offset, int whence, loff_t size) in fixed_size_llseek() argument
166 return generic_file_llseek_size(file, offset, whence, in fixed_size_llseek()
176 * @file: file structure to seek on
177 * @offset: file offset to seek to
181 loff_t no_seek_end_llseek(struct file *file, loff_t offset, int whence) in no_seek_end_llseek() argument
185 return generic_file_llseek_size(file, offset, whence, in no_seek_end_llseek()
195 * @file: file structure to seek on
196 * @offset: file offset to seek to
201 loff_t no_seek_end_llseek_size(struct file *file, loff_t offset, int whence, loff_t size) in no_seek_end_llseek_size() argument
205 return generic_file_llseek_size(file, offset, whence, in no_seek_end_llseek_size()
215 * @file: file structure to seek on
216 * @offset: file offset to seek to
220 * userspace expects the seek to succeed but the (device) file is actually not
224 loff_t noop_llseek(struct file *file, loff_t offset, int whence) in noop_llseek() argument
226 return file->f_pos; in noop_llseek()
230 loff_t no_llseek(struct file *file, loff_t offset, int whence) in no_llseek() argument
236 loff_t default_llseek(struct file *file, loff_t offset, int whence) in default_llseek() argument
238 struct inode *inode = file_inode(file); in default_llseek()
248 retval = file->f_pos; in default_llseek()
251 offset += file->f_pos; in default_llseek()
255 * In the generic case the entire file is data, so as in default_llseek()
256 * long as offset isn't at the end of the file then the in default_llseek()
266 * There is a virtual hole at the end of the file, so in default_llseek()
278 if (offset >= 0 || unsigned_offsets(file)) { in default_llseek()
279 if (offset != file->f_pos) { in default_llseek()
280 file->f_pos = offset; in default_llseek()
281 file->f_version = 0; in default_llseek()
291 loff_t vfs_llseek(struct file *file, loff_t offset, int whence) in vfs_llseek() argument
293 loff_t (*fn)(struct file *, loff_t, int); in vfs_llseek()
296 if (file->f_mode & FMODE_LSEEK) { in vfs_llseek()
297 if (file->f_op->llseek) in vfs_llseek()
298 fn = file->f_op->llseek; in vfs_llseek()
300 return fn(file, offset, whence); in vfs_llseek()
308 if (!f.file) in ksys_lseek()
313 loff_t res = vfs_llseek(f.file, offset, whence); in ksys_lseek()
343 if (!f.file) in SYSCALL_DEFINE5()
350 offset = vfs_llseek(f.file, ((loff_t) offset_high << 32) | offset_low, in SYSCALL_DEFINE5()
365 int rw_verify_area(int read_write, struct file *file, const loff_t *ppos, size_t count) in rw_verify_area() argument
371 inode = file_inode(file); in rw_verify_area()
376 if (!unsigned_offsets(file)) in rw_verify_area()
381 if (!unsigned_offsets(file)) in rw_verify_area()
386 retval = locks_mandatory_area(inode, file, pos, pos + count - 1, in rw_verify_area()
391 return security_file_permission(file, in rw_verify_area()
395 static ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos) in new_sync_read()
412 ssize_t __vfs_read(struct file *file, char __user *buf, size_t count, in __vfs_read() argument
415 if (file->f_op->read) in __vfs_read()
416 return file->f_op->read(file, buf, count, pos); in __vfs_read()
417 else if (file->f_op->read_iter) in __vfs_read()
418 return new_sync_read(file, buf, count, pos); in __vfs_read()
423 ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos) in kernel_read() argument
431 result = vfs_read(file, (void __user *)buf, count, pos); in kernel_read()
437 ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos) in vfs_read() argument
441 if (!(file->f_mode & FMODE_READ)) in vfs_read()
443 if (!(file->f_mode & FMODE_CAN_READ)) in vfs_read()
448 ret = rw_verify_area(READ, file, pos, count); in vfs_read()
452 ret = __vfs_read(file, buf, count, pos); in vfs_read()
454 fsnotify_access(file); in vfs_read()
463 static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos) in new_sync_write()
481 ssize_t __vfs_write(struct file *file, const char __user *p, size_t count, in __vfs_write() argument
484 if (file->f_op->write) in __vfs_write()
485 return file->f_op->write(file, p, count, pos); in __vfs_write()
486 else if (file->f_op->write_iter) in __vfs_write()
487 return new_sync_write(file, p, count, pos); in __vfs_write()
492 ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos) in __kernel_write() argument
498 if (!(file->f_mode & FMODE_CAN_WRITE)) in __kernel_write()
506 ret = __vfs_write(file, p, count, pos); in __kernel_write()
509 fsnotify_modify(file); in __kernel_write()
517 ssize_t kernel_write(struct file *file, const void *buf, size_t count, in kernel_write() argument
526 res = vfs_write(file, (__force const char __user *)buf, count, pos); in kernel_write()
533 ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos) in vfs_write() argument
537 if (!(file->f_mode & FMODE_WRITE)) in vfs_write()
539 if (!(file->f_mode & FMODE_CAN_WRITE)) in vfs_write()
544 ret = rw_verify_area(WRITE, file, pos, count); in vfs_write()
548 file_start_write(file); in vfs_write()
549 ret = __vfs_write(file, buf, count, pos); in vfs_write()
551 fsnotify_modify(file); in vfs_write()
555 file_end_write(file); in vfs_write()
561 static inline loff_t file_pos_read(struct file *file) in file_pos_read() argument
563 return file->f_mode & FMODE_STREAM ? 0 : file->f_pos; in file_pos_read()
566 static inline void file_pos_write(struct file *file, loff_t pos) in file_pos_write() argument
568 if ((file->f_mode & FMODE_STREAM) == 0) in file_pos_write()
569 file->f_pos = pos; in file_pos_write()
577 if (f.file) { in ksys_read()
578 loff_t pos = file_pos_read(f.file); in ksys_read()
579 ret = vfs_read(f.file, buf, count, &pos); in ksys_read()
581 file_pos_write(f.file, pos); in ksys_read()
597 if (f.file) { in ksys_write()
598 loff_t pos = file_pos_read(f.file); in ksys_write()
599 ret = vfs_write(f.file, buf, count, &pos); in ksys_write()
601 file_pos_write(f.file, pos); in ksys_write()
624 if (f.file) { in ksys_pread64()
626 if (f.file->f_mode & FMODE_PREAD) in ksys_pread64()
627 ret = vfs_read(f.file, buf, count, &pos); in ksys_pread64()
650 if (f.file) { in ksys_pwrite64()
652 if (f.file->f_mode & FMODE_PWRITE) in ksys_pwrite64()
653 ret = vfs_write(f.file, buf, count, &pos); in ksys_pwrite64()
666 static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter, in do_iter_readv_writev()
687 /* Do it by hand, with file-ops */
688 static ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter, in do_loop_readv_writev()
904 static ssize_t do_iter_read(struct file *file, struct iov_iter *iter, in do_iter_read() argument
910 if (!(file->f_mode & FMODE_READ)) in do_iter_read()
912 if (!(file->f_mode & FMODE_CAN_READ)) in do_iter_read()
918 ret = rw_verify_area(READ, file, pos, tot_len); in do_iter_read()
922 if (file->f_op->read_iter) in do_iter_read()
923 ret = do_iter_readv_writev(file, iter, pos, READ, flags); in do_iter_read()
925 ret = do_loop_readv_writev(file, iter, pos, READ, flags); in do_iter_read()
928 fsnotify_access(file); in do_iter_read()
932 ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos, in vfs_iter_read() argument
935 if (!file->f_op->read_iter) in vfs_iter_read()
937 return do_iter_read(file, iter, ppos, flags); in vfs_iter_read()
941 static ssize_t do_iter_write(struct file *file, struct iov_iter *iter, in do_iter_write() argument
947 if (!(file->f_mode & FMODE_WRITE)) in do_iter_write()
949 if (!(file->f_mode & FMODE_CAN_WRITE)) in do_iter_write()
955 ret = rw_verify_area(WRITE, file, pos, tot_len); in do_iter_write()
959 if (file->f_op->write_iter) in do_iter_write()
960 ret = do_iter_readv_writev(file, iter, pos, WRITE, flags); in do_iter_write()
962 ret = do_loop_readv_writev(file, iter, pos, WRITE, flags); in do_iter_write()
964 fsnotify_modify(file); in do_iter_write()
968 ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos, in vfs_iter_write() argument
971 if (!file->f_op->write_iter) in vfs_iter_write()
973 return do_iter_write(file, iter, ppos, flags); in vfs_iter_write()
977 ssize_t vfs_readv(struct file *file, const struct iovec __user *vec, in vfs_readv() argument
987 ret = do_iter_read(file, &iter, pos, flags); in vfs_readv()
994 static ssize_t vfs_writev(struct file *file, const struct iovec __user *vec, in vfs_writev() argument
1004 file_start_write(file); in vfs_writev()
1005 ret = do_iter_write(file, &iter, pos, flags); in vfs_writev()
1006 file_end_write(file); in vfs_writev()
1018 if (f.file) { in do_readv()
1019 loff_t pos = file_pos_read(f.file); in do_readv()
1020 ret = vfs_readv(f.file, vec, vlen, &pos, flags); in do_readv()
1022 file_pos_write(f.file, pos); in do_readv()
1038 if (f.file) { in do_writev()
1039 loff_t pos = file_pos_read(f.file); in do_writev()
1040 ret = vfs_writev(f.file, vec, vlen, &pos, flags); in do_writev()
1042 file_pos_write(f.file, pos); in do_writev()
1068 if (f.file) { in do_preadv()
1070 if (f.file->f_mode & FMODE_PREAD) in do_preadv()
1071 ret = vfs_readv(f.file, vec, vlen, &pos, flags); in do_preadv()
1091 if (f.file) { in do_pwritev()
1093 if (f.file->f_mode & FMODE_PWRITE) in do_pwritev()
1094 ret = vfs_writev(f.file, vec, vlen, &pos, flags); in do_pwritev()
1157 static size_t compat_readv(struct file *file, in compat_readv() argument
1168 ret = do_iter_read(file, &iter, pos, flags); in compat_readv()
1185 if (!f.file) in do_compat_readv()
1187 pos = f.file->f_pos; in do_compat_readv()
1188 ret = compat_readv(f.file, vec, vlen, &pos, flags); in do_compat_readv()
1190 f.file->f_pos = pos; in do_compat_readv()
1213 if (!f.file) in do_compat_preadv64()
1216 if (f.file->f_mode & FMODE_PREAD) in do_compat_preadv64()
1217 ret = compat_readv(f.file, vec, vlen, &pos, flags); in do_compat_preadv64()
1265 static size_t compat_writev(struct file *file, in compat_writev() argument
1276 file_start_write(file); in compat_writev()
1277 ret = do_iter_write(file, &iter, pos, flags); in compat_writev()
1278 file_end_write(file); in compat_writev()
1295 if (!f.file) in do_compat_writev()
1297 pos = f.file->f_pos; in do_compat_writev()
1298 ret = compat_writev(f.file, vec, vlen, &pos, flags); in do_compat_writev()
1300 f.file->f_pos = pos; in do_compat_writev()
1322 if (!f.file) in do_compat_pwritev64()
1325 if (f.file->f_mode & FMODE_PWRITE) in do_compat_pwritev64()
1326 ret = compat_writev(f.file, vec, vlen, &pos, flags); in do_compat_pwritev64()
1386 * Get input file, and verify that it is ok.. in do_sendfile()
1390 if (!in.file) in do_sendfile()
1392 if (!(in.file->f_mode & FMODE_READ)) in do_sendfile()
1396 pos = in.file->f_pos; in do_sendfile()
1399 if (!(in.file->f_mode & FMODE_PREAD)) in do_sendfile()
1402 retval = rw_verify_area(READ, in.file, &pos, count); in do_sendfile()
1409 * Get output file, and verify that it is ok.. in do_sendfile()
1413 if (!out.file) in do_sendfile()
1415 if (!(out.file->f_mode & FMODE_WRITE)) in do_sendfile()
1418 in_inode = file_inode(in.file); in do_sendfile()
1419 out_inode = file_inode(out.file); in do_sendfile()
1420 out_pos = out.file->f_pos; in do_sendfile()
1421 retval = rw_verify_area(WRITE, out.file, &out_pos, count); in do_sendfile()
1441 * EAGAIN on a non-blocking file descriptor. in do_sendfile()
1443 if (in.file->f_flags & O_NONBLOCK) in do_sendfile()
1446 file_start_write(out.file); in do_sendfile()
1447 retval = do_splice_direct(in.file, &pos, out.file, &out_pos, count, fl); in do_sendfile()
1448 file_end_write(out.file); in do_sendfile()
1453 fsnotify_access(in.file); in do_sendfile()
1454 fsnotify_modify(out.file); in do_sendfile()
1455 out.file->f_pos = out_pos; in do_sendfile()
1459 in.file->f_pos = pos; in do_sendfile()
1552 * copy_file_range() differs from regular file read and write in that it
1556 ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in, in vfs_copy_file_range()
1557 struct file *file_out, loff_t pos_out, in vfs_copy_file_range()
1595 * Try cloning first, this is supported by more file systems, and in vfs_copy_file_range()
1645 if (!f_in.file) in SYSCALL_DEFINE6()
1649 if (!f_out.file) in SYSCALL_DEFINE6()
1657 pos_in = f_in.file->f_pos; in SYSCALL_DEFINE6()
1664 pos_out = f_out.file->f_pos; in SYSCALL_DEFINE6()
1667 ret = vfs_copy_file_range(f_in.file, pos_in, f_out.file, pos_out, len, in SYSCALL_DEFINE6()
1677 f_in.file->f_pos = pos_in; in SYSCALL_DEFINE6()
1684 f_out.file->f_pos = pos_out; in SYSCALL_DEFINE6()
1696 static int clone_verify_area(struct file *file, loff_t pos, u64 len, bool write) in clone_verify_area() argument
1698 struct inode *inode = file_inode(file); in clone_verify_area()
1710 retval = locks_mandatory_area(inode, file, pos, end, in clone_verify_area()
1716 return security_file_permission(file, write ? MAY_WRITE : MAY_READ); in clone_verify_area()
1726 * For clone we only link a partial EOF block above the destination file's EOF.
1797 /* Don't allow dedupe past EOF in the dest file */ in vfs_clone_file_prep_inodes()
1817 /* Don't allow overlapped reflink within the same file */ in vfs_clone_file_prep_inodes()
1861 int do_clone_file_range(struct file *file_in, loff_t pos_in, in do_clone_file_range()
1862 struct file *file_out, loff_t pos_out, u64 len) in do_clone_file_range()
1875 * the same mount. Practically, they only need to be on the same file in do_clone_file_range()
1911 int vfs_clone_file_range(struct file *file_in, loff_t pos_in, in vfs_clone_file_range()
1912 struct file *file_out, loff_t pos_out, u64 len) in vfs_clone_file_range()
1924 /* Read a page's worth of file data into the page cache. */
1945 * the same file.
2011 * mapped to the file data we're interested in. If not, in vfs_dedupe_file_range_compare()
2053 int vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos, in vfs_dedupe_file_range_one()
2054 struct file *dst_file, loff_t dst_pos, u64 len) in vfs_dedupe_file_range_one()
2091 int vfs_dedupe_file_range(struct file *file, struct file_dedupe_range *same) in vfs_dedupe_file_range() argument
2094 struct inode *src = file_inode(file); in vfs_dedupe_file_range()
2102 if (!(file->f_mode & FMODE_READ)) in vfs_dedupe_file_range()
2119 ret = clone_verify_area(file, off, len, false); in vfs_dedupe_file_range()
2138 struct file *dst_file = dst_fd.file; in vfs_dedupe_file_range()
2150 deduped = vfs_dedupe_file_range_one(file, off, dst_file, in vfs_dedupe_file_range()