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path: root/drivers/char/ps3flash.c

Age	Commit message (Collapse)	Author
2016-01-22	wrappers for ->i_mutex access	Al Viro
	parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested}, inode_foo(inode) being mutex_foo(&inode->i_mutex). Please, use those for access to ->i_mutex; over the coming cycle ->i_mutex will become rwsem, with ->lookup() done with it held only shared. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29	ps3flash: switch to generic_file_llseek_size()	Al Viro
	Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22	new helper: file_inode(file)	Al Viro
	Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-21	char: remove use of __devinit	Bill Pemberton
	CONFIG_HOTPLUG is going away as an option so __devinit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Geoff Levand <geoff@infradead.org> Cc: Mattia Dongili <malattia@linux.it> Cc: Amit Shah <amit.shah@redhat.com> Cc: openipmi-developer@lists.sourceforge.net Cc: linuxppc-dev@lists.ozlabs.org Cc: cbe-oss-dev@lists.ozlabs.org Cc: platform-driver-x86@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2011-10-31	drivers/char: Add module.h to those who were using it implicitly	Paul Gortmaker
	A pending cleanup will mean that module.h won't be implicitly everywhere anymore. Make sure the modular drivers in char are actually calling out for <module.h> explicitly in advance. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-07-20	fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers	Josef Bacik
	Btrfs needs to be able to control how filemap_write_and_wait_range() is called in fsync to make it less of a painful operation, so push down taking i_mutex and the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some file systems can drop taking the i_mutex altogether it seems, like ext3 and ocfs2. For correctness sake I just pushed everything down in all cases to make sure that we keep the current behavior the same for everybody, and then each individual fs maintainer can make up their mind about what to do from there. Thanks, Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20	drivers: fix up various ->llseek() implementations	Josef Bacik
	Fix up a few ->llseek() implementations that won't deal with SEEK_HOLE/SEEK_DATA properly. Make them future proof so that if we ever add new options they will return -EINVAL. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-05-27	drop unused dentry argument to ->fsync	Christoph Hellwig
	Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-03-30	include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵	Tejun Heo
	implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2009-06-15	ps3flash: Always read chunks of 256 KiB, and cache them	Geert Uytterhoeven
	Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-15	ps3flash: Cache the last accessed FLASH chunk	Geert Uytterhoeven
	Add support for caching, to reduce FLASH wear when writing using small blocksizes. As we also don't care anymore about heads and tails in case of partial writes, this greatly simplifies the code for handling writes. Note: We don't bother caching reads smaller than the FLASH chunk size (256 KiB). Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-15	ps3: Replace direct file operations by callback	Geert Uytterhoeven
	Currently the FLASH database is updated by the kernel using file operations, meant for userspace only. While this works for us because copy_{from,to}_user() on powerpc can handle kernel pointers, this is unportable and a bad example. Replace the file operations by callbacks, registered by the ps3flash driver. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Geoff Levand <geoffrey.levand@am.sony.com> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-15	ps3flash: Use ps3_system_bus_[gs]et_drvdata() instead of direct access	Geert Uytterhoeven
	Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-01-16	powerpc/ps3: Printing fixups for l64 to ll64 conversion drivers/char	Stephen Rothwell
	Also a couple of min -> min_t changes. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2007-07-21	ps3: FLASH ROM Storage Driver	Geert Uytterhoeven
	Add a FLASH ROM Storage Driver for the PS3: - Implemented as a misc character device driver - Uses a fixed 256 KiB buffer allocated from boot memory as the hypervisor requires the writing of aligned 256 KiB blocks Cc: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

generated by cgit v1.2.3 (git 2.25.1) at 2024-07-23 17:02:07 +0000

/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */

/*
 * crypt.c: Generic encryption support.
 */
#include "vim.h"

#if defined(FEAT_CRYPT) || defined(PROTO)
/*
 * Optional encryption support.
 * Mohsin Ahmed, mosh@sasi.com, 1998-09-24
 * Based on zip/crypt sources.
 * Refactored by David Leadbeater, 2014.
 *
 * NOTE FOR USA: Since 2000 exporting this code from the USA is allowed to
 * most countries.  There are a few exceptions, but that still should not be a
 * problem since this code was originally created in Europe and India.
 *
 * Blowfish addition originally made by Mohsin Ahmed,
 * http://www.cs.albany.edu/~mosh 2010-03-14
 * Based on blowfish by Bruce Schneier (http://www.schneier.com/blowfish.html)
 * and sha256 by Christophe Devine.
 */

typedef struct {
    char    *name;	/* encryption name as used in 'cryptmethod' */
    char    *magic;	/* magic bytes stored in file header */
    int	    salt_len;	/* length of salt, or 0 when not using salt */
    int	    seed_len;	/* length of seed, or 0 when not using salt */
#ifdef CRYPT_NOT_INPLACE
    int	    works_inplace; /* encryption/decryption can be done in-place */
#endif
    int	    whole_undofile; /* whole undo file is encrypted */

    /* Optional function pointer for a self-test. */
    int (* self_test_fn)();

    // Function pointer for initializing encryption/description.
    void (* init_fn)(cryptstate_T *state, char_u *key,
		      char_u *salt, int salt_len, char_u *seed, int seed_len);

    /* Function pointers for encoding/decoding from one buffer into another.
     * Optional, however, these or the _buffer ones should be configured. */
    void (*encode_fn)(cryptstate_T *state, char_u *from, size_t len,
								  char_u *to);
    void (*decode_fn)(cryptstate_T *state, char_u *from, size_t len,
								  char_u *to);

    /* Function pointers for encoding and decoding, can buffer data if needed.
     * Optional (however, these or the above should be configured). */
    long (*encode_buffer_fn)(cryptstate_T *state, char_u *from, size_t len,
							     char_u **newptr);
    long (*decode_buffer_fn)(cryptstate_T *state, char_u *from, size_t len,
							     char_u **newptr);

    /* Function pointers for in-place encoding and decoding, used for
     * crypt_*_inplace(). "from" and "to" arguments will be equal.
     * These may be the same as decode_fn and encode_fn above, however an
     * algorithm may implement them in a way that is not interchangeable with
     * the crypt_(en|de)code() interface (for example because it wishes to add
     * padding to files).
     * This method is used for swap and undo files which have a rigid format.
     */
    void (*encode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len,
								  char_u *p2);
    void (*decode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len,
								  char_u *p2);
} cryptmethod_T;

/* index is method_nr of cryptstate_T, CRYPT_M_* */
static cryptmethod_T cryptmethods[CRYPT_M_COUNT] = {
    /* PK_Zip; very weak */
    {
	"zip",
	"VimCrypt~01!",
	0,
	0,
#ifdef CRYPT_NOT_INPLACE
	TRUE,
#endif
	FALSE,
	NULL,
	crypt_zip_init,
	crypt_zip_encode, crypt_zip_decode,
	NULL, NULL,
	crypt_zip_encode, crypt_zip_decode,
    },

    /* Blowfish/CFB + SHA-256 custom key derivation; implementation issues. */
    {
	"blowfish",
	"VimCrypt~02!",
	8,
	8,
#ifdef CRYPT_NOT_INPLACE
	TRUE,
#endif
	FALSE,
	blowfish_self_test,
	crypt_blowfish_init,
	crypt_blowfish_encode, crypt_blowfish_decode,
	NULL, NULL,
	crypt_blowfish_encode, crypt_blowfish_decode,
    },

    /* Blowfish/CFB + SHA-256 custom key derivation; fixed. */
    {
	"blowfish2",
	"VimCrypt~03!",
	8,
	8,
#ifdef CRYPT_NOT_INPLACE
	TRUE,
#endif
	TRUE,
	blowfish_self_test,
	crypt_blowfish_init,
	crypt_blowfish_encode, crypt_blowfish_decode,
	NULL, NULL,
	crypt_blowfish_encode, crypt_blowfish_decode,
    },

    /* NOTE: when adding a new method, use some random bytes for the magic key,
     * to avoid that a text file is recognized as encrypted. */
};

#define CRYPT_MAGIC_LEN	12	/* cannot change */
static char	crypt_magic_head[] = "VimCrypt~";

/*
 * Return int value for crypt method name.
 * 0 for "zip", the old method.  Also for any non-valid value.
 * 1 for "blowfish".
 * 2 for "blowfish2".
 */
    int
crypt_method_nr_from_name(char_u *name)
{
    int i;

    for (i = 0; i < CRYPT_M_COUNT; ++i)
	if (STRCMP(name, cryptmethods[i].name) == 0)
	    return i;
    return 0;
}

/*
 * Get the crypt method used for a file from "ptr[len]", the magic text at the
 * start of the file.
 * Returns -1 when no encryption used.
 */
    int
crypt_method_nr_from_magic(char *ptr, int len)
{
    int i;

    if (len < CRYPT_MAGIC_LEN)
	return -1;

    for (i = 0; i < CRYPT_M_COUNT; i++)
	if (memcmp(ptr, cryptmethods[i].magic, CRYPT_MAGIC_LEN) == 0)
	    return i;

    i = (int)STRLEN(crypt_magic_head);
    if (len >= i && memcmp(ptr, crypt_magic_head, i) == 0)
	emsg(_("E821: File is encrypted with unknown method"));

    return -1;
}

#ifdef CRYPT_NOT_INPLACE
/*
 * Return TRUE if the crypt method for "method_nr" can be done in-place.
 */
    int
crypt_works_inplace(cryptstate_T *state)
{
    return cryptmethods[state->method_nr].works_inplace;
}
#endif

/*
 * Get the crypt method for buffer "buf" as a number.
 */
    int
crypt_get_method_nr(buf_T *buf)
{
    return crypt_method_nr_from_name(*buf->b_p_cm == NUL ? p_cm : buf->b_p_cm);
}

/*
 * Return TRUE when the buffer uses an encryption method that encrypts the
 * whole undo file, not only the text.
 */
    int
crypt_whole_undofile(int method_nr)
{
    return cryptmethods[method_nr].whole_undofile;
}

/*
 * Get crypt method specifc length of the file header in bytes.
 */
    int
crypt_get_header_len(int method_nr)
{
    return CRYPT_MAGIC_LEN
	+ cryptmethods[method_nr].salt_len
	+ cryptmethods[method_nr].seed_len;
}

/*
 * Set the crypt method for buffer "buf" to "method_nr" using the int value as
 * returned by crypt_method_nr_from_name().
 */
    void
crypt_set_cm_option(buf_T *buf, int method_nr)
{
    free_string_option(buf->b_p_cm);
    buf->b_p_cm = vim_strsave((char_u *)cryptmethods[method_nr].name);
}

/*
 * If the crypt method for the current buffer has a self-test, run it and
 * return OK/FAIL.
 */
    int
crypt_self_test(void)
{
    int method_nr = crypt_get_method_nr(curbuf);

    if (cryptmethods[method_nr].self_test_fn == NULL)
	return OK;
    return cryptmethods[method_nr].self_test_fn();
}

/*
 * Allocate a crypt state and initialize it.
 */
    cryptstate_T *
crypt_create(
    int		method_nr,
    char_u	*key,
    char_u	*salt,
    int		salt_len,
    char_u	*seed,
    int		seed_len)
{
    cryptstate_T *state = (cryptstate_T *)alloc((int)sizeof(cryptstate_T));

    state->method_nr = method_nr;
    cryptmethods[method_nr].init_fn(state, key, salt, salt_len, seed, seed_len);
    return state;
}

/*
 * Allocate a crypt state from a file header and initialize it.
 * Assumes that header contains at least the number of bytes that
 * crypt_get_header_len() returns for "method_nr".
 */
    cryptstate_T *
crypt_create_from_header(
    int		method_nr,
    char_u	*key,
    char_u	*header)
{
    char_u	*salt = NULL;
    char_u	*seed = NULL;
    int		salt_len = cryptmethods[method_nr].salt_len;
    int		seed_len = cryptmethods[method_nr].seed_len;

    if (salt_len > 0)
	salt = header + CRYPT_MAGIC_LEN;
    if (seed_len > 0)
	seed = header + CRYPT_MAGIC_LEN + salt_len;

    return crypt_create(method_nr, key, salt, salt_len, seed, seed_len);
}

/*
 * Read the crypt method specific header data from "fp".
 * Return an allocated cryptstate_T or NULL on error.
 */
    cryptstate_T *
crypt_create_from_file(FILE *fp, char_u *key)
{
    int		method_nr;
    int		header_len;
    char	magic_buffer[