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author | Kees Cook <keescook@chromium.org> | 2020-10-02 10:38:25 -0700 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-05 13:37:04 +0200 |
commit | 0fa8e084648779eeb8929ae004301b3acf3bad84 (patch) | |
tree | ebfed647c8f2a43a0967ba127c7e75df36909cba /include/linux/kernel_read_file.h | |
parent | 34736daeecd1608bee21e3bf5170cd4c95143109 (diff) | |
download | linux-stable-0fa8e084648779eeb8929ae004301b3acf3bad84.tar.gz linux-stable-0fa8e084648779eeb8929ae004301b3acf3bad84.tar.bz2 linux-stable-0fa8e084648779eeb8929ae004301b3acf3bad84.zip |
fs/kernel_file_read: Add "offset" arg for partial reads
To perform partial reads, callers of kernel_read_file*() must have a
non-NULL file_size argument and a preallocated buffer. The new "offset"
argument can then be used to seek to specific locations in the file to
fill the buffer to, at most, "buf_size" per call.
Where possible, the LSM hooks can report whether a full file has been
read or not so that the contents can be reasoned about.
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20201002173828.2099543-14-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/kernel_read_file.h')
-rw-r--r-- | include/linux/kernel_read_file.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/kernel_read_file.h b/include/linux/kernel_read_file.h index 023293eaf948..575ffa1031d3 100644 --- a/include/linux/kernel_read_file.h +++ b/include/linux/kernel_read_file.h @@ -35,19 +35,19 @@ static inline const char *kernel_read_file_id_str(enum kernel_read_file_id id) return kernel_read_file_str[id]; } -int kernel_read_file(struct file *file, +int kernel_read_file(struct file *file, loff_t offset, void **buf, size_t buf_size, size_t *file_size, enum kernel_read_file_id id); -int kernel_read_file_from_path(const char *path, +int kernel_read_file_from_path(const char *path, loff_t offset, void **buf, size_t buf_size, size_t *file_size, enum kernel_read_file_id id); -int kernel_read_file_from_path_initns(const char *path, +int kernel_read_file_from_path_initns(const char *path, loff_t offset, void **buf, size_t buf_size, size_t *file_size, enum kernel_read_file_id id); -int kernel_read_file_from_fd(int fd, +int kernel_read_file_from_fd(int fd, loff_t offset, void **buf, size_t buf_size, size_t *file_size, enum kernel_read_file_id id); |