Change the interface for the sandbox functions to take in an extra parameter of type "loff_t *" to return the size. The return values of these funtions now serve as an indicator of error conditions alone.
Signed-off-by: Suriyan Ramasami suriyan.r@gmail.com
---
Changes in v6: * Simon - Split this into a separate patch
Changes in v5: None
arch/sandbox/cpu/os.c | 13 +++++---- arch/sandbox/cpu/state.c | 8 +++--- common/board_f.c | 8 +++--- fs/sandbox/sandboxfs.c | 73 ++++++++++++++++++++++++++++++++---------------- include/os.h | 5 ++-- include/sandboxfs.h | 14 ++++++---- 6 files changed, 76 insertions(+), 45 deletions(-)
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c index 1c4aa3f..31c9344 100644 --- a/arch/sandbox/cpu/os.c +++ b/arch/sandbox/cpu/os.c @@ -385,7 +385,7 @@ const char *os_dirent_get_typename(enum os_dirent_t type) return os_dirent_typename[OS_FILET_UNKNOWN]; }
-ssize_t os_get_filesize(const char *fname) +int os_get_filesize(const char *fname, loff_t *size) { struct stat buf; int ret; @@ -393,7 +393,8 @@ ssize_t os_get_filesize(const char *fname) ret = stat(fname, &buf); if (ret) return ret; - return buf.st_size; + *size = buf.st_size; + return 0; }
void os_putc(int ch) @@ -427,11 +428,11 @@ int os_read_ram_buf(const char *fname) { struct sandbox_state *state = state_get_current(); int fd, ret; - int size; + loff_t size;
- size = os_get_filesize(fname); - if (size < 0) - return -ENOENT; + ret = os_get_filesize(fname, &size); + if (ret < 0) + return ret; if (size != state->ram_size) return -ENOSPC; fd = open(fname, O_RDONLY); diff --git a/arch/sandbox/cpu/state.c b/arch/sandbox/cpu/state.c index 59adad6..ba73b7e 100644 --- a/arch/sandbox/cpu/state.c +++ b/arch/sandbox/cpu/state.c @@ -49,14 +49,14 @@ static int state_ensure_space(int extra_size)
static int state_read_file(struct sandbox_state *state, const char *fname) { - int size; + loff_t size; int ret; int fd;
- size = os_get_filesize(fname); - if (size < 0) { + ret = os_get_filesize(fname, &size); + if (ret < 0) { printf("Cannot find sandbox state file '%s'\n", fname); - return -ENOENT; + return ret; } state->state_fdt = os_malloc(size); if (!state->state_fdt) { diff --git a/common/board_f.c b/common/board_f.c index b5bebc9..844cc19 100644 --- a/common/board_f.c +++ b/common/board_f.c @@ -285,7 +285,7 @@ static int read_fdt_from_file(void) struct sandbox_state *state = state_get_current(); const char *fname = state->fdt_fname; void *blob; - ssize_t size; + loff_t size; int err; int fd;
@@ -298,10 +298,10 @@ static int read_fdt_from_file(void) return -EINVAL; }
- size = os_get_filesize(fname); - if (size < 0) { + err = os_get_filesize(fname, &size); + if (err < 0) { printf("Failed to file FDT file '%s'\n", fname); - return -ENOENT; + return err; } fd = os_open(fname, OS_O_RDONLY); if (fd < 0) { diff --git a/fs/sandbox/sandboxfs.c b/fs/sandbox/sandboxfs.c index ba6402c..9ecd2f7 100644 --- a/fs/sandbox/sandboxfs.c +++ b/fs/sandbox/sandboxfs.c @@ -13,10 +13,10 @@ int sandbox_fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info) return 0; }
-long sandbox_fs_read_at(const char *filename, unsigned long pos, - void *buffer, unsigned long maxsize) +int sandbox_fs_read_at(const char *filename, loff_t pos, void *buffer, + loff_t maxsize, loff_t *actread) { - ssize_t size; + loff_t size; int fd, ret;
fd = os_open(filename, OS_O_RDONLY); @@ -27,16 +27,31 @@ long sandbox_fs_read_at(const char *filename, unsigned long pos, os_close(fd); return ret; } - if (!maxsize) - maxsize = os_get_filesize(filename); + if (!maxsize) { + ret = os_get_filesize(filename, &size); + if (ret) { + os_close(fd); + return ret; + } + + maxsize = size; + } + size = os_read(fd, buffer, maxsize); os_close(fd);
- return size; + if (size < 0) { + ret = -1; + } else { + ret = 0; + *actread = size; + } + + return ret; }
-long sandbox_fs_write_at(const char *filename, unsigned long pos, - void *buffer, unsigned long towrite) +int sandbox_fs_write_at(const char *filename, loff_t pos, void *buffer, + loff_t towrite, loff_t *actwrite) { ssize_t size; int fd, ret; @@ -52,7 +67,14 @@ long sandbox_fs_write_at(const char *filename, unsigned long pos, size = os_write(fd, buffer, towrite); os_close(fd);
- return size; + if (size == -1) { + ret = -1; + } else { + ret = 0; + *actwrite = size; + } + + return ret; }
int sandbox_fs_ls(const char *dirname) @@ -74,43 +96,46 @@ int sandbox_fs_ls(const char *dirname)
int sandbox_fs_exists(const char *filename) { - ssize_t sz; + loff_t sz; + int ret;
- sz = os_get_filesize(filename); - return sz >= 0; + ret = os_get_filesize(filename, &sz); + return ret == 0; }
-int sandbox_fs_size(const char *filename) +int sandbox_fs_size(const char *filename, loff_t *size) { - return os_get_filesize(filename); + return os_get_filesize(filename, size); }
void sandbox_fs_close(void) { }
-int fs_read_sandbox(const char *filename, void *buf, int offset, int len) +int fs_read_sandbox(const char *filename, void *buf, loff_t offset, loff_t len, + loff_t *actread) { - int len_read; + int ret;
- len_read = sandbox_fs_read_at(filename, offset, buf, len); - if (len_read == -1) { + ret = sandbox_fs_read_at(filename, offset, buf, len, actread); + if (ret) { printf("** Unable to read file %s **\n", filename); return -1; }
- return len_read; + return 0; }
-int fs_write_sandbox(const char *filename, void *buf, int offset, int len) +int fs_write_sandbox(const char *filename, void *buf, loff_t offset, + loff_t len, loff_t *actwrite) { - int len_written; + int ret;
- len_written = sandbox_fs_write_at(filename, offset, buf, len); - if (len_written == -1) { + ret = sandbox_fs_write_at(filename, offset, buf, len, actwrite); + if (ret == -1) { printf("** Unable to write file %s **\n", filename); return -1; }
- return len_written; + return 0; } diff --git a/include/os.h b/include/os.h index 0230a7f..e3645e0 100644 --- a/include/os.h +++ b/include/os.h @@ -217,9 +217,10 @@ const char *os_dirent_get_typename(enum os_dirent_t type); * Get the size of a file * * @param fname Filename to check - * @return size of file, or -1 if an error ocurred + * @param size size of file is returned if no error + * @return 0 on success or -1 if an error ocurred */ -ssize_t os_get_filesize(const char *fname); +int os_get_filesize(const char *fname, loff_t *size);
/** * Write a character to the controlling OS terminal diff --git a/include/sandboxfs.h b/include/sandboxfs.h index e7c3262..4c7745d 100644 --- a/include/sandboxfs.h +++ b/include/sandboxfs.h @@ -20,14 +20,18 @@
int sandbox_fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info);
-long sandbox_fs_read_at(const char *filename, unsigned long pos, - void *buffer, unsigned long maxsize); +int sandbox_fs_read_at(const char *filename, loff_t pos, void *buffer, + loff_t maxsize, loff_t *actread); +int sandbox_fs_write_at(const char *filename, loff_t pos, void *buffer, + loff_t maxsize, loff_t *actwrite);
void sandbox_fs_close(void); int sandbox_fs_ls(const char *dirname); int sandbox_fs_exists(const char *filename); -int sandbox_fs_size(const char *filename); -int fs_read_sandbox(const char *filename, void *buf, int offset, int len); -int fs_write_sandbox(const char *filename, void *buf, int offset, int len); +int sandbox_fs_size(const char *filename, loff_t *size); +int fs_read_sandbox(const char *filename, void *buf, loff_t offset, loff_t len, + loff_t *actread); +int fs_write_sandbox(const char *filename, void *buf, loff_t offset, + loff_t len, loff_t *actwrite);
#endif