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[readdir] convert udf

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-05-16 01:09:37 -04:00
parent 5ded75ec4c
commit 5add2ee198
1 changed files with 26 additions and 37 deletions
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63
fs/udf/dir.c
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@ -35,14 +35,16 @@
#include "udf_i.h"
#include "udf_sb.h"
static int do_udf_readdir(struct inode *dir, struct file *filp,
filldir_t filldir, void *dirent)
static int udf_readdir(struct file *file, struct dir_context *ctx)
{
struct inode *dir = file_inode(file);
struct udf_inode_info *iinfo = UDF_I(dir);
struct udf_fileident_bh fibh = { .sbh = NULL, .ebh = NULL};
struct fileIdentDesc *fi = NULL;
struct fileIdentDesc cfi;
int block, iblock;
loff_t nf_pos = (filp->f_pos - 1) << 2;
loff_t nf_pos;
int flen;
unsigned char *fname = NULL;
unsigned char *nameptr;
@ -54,10 +56,14 @@ static int do_udf_readdir(struct inode *dir, struct file *filp,
uint32_t elen;
sector_t offset;
int i, num, ret = 0;
unsigned int dt_type;
struct extent_position epos = { NULL, 0, {0, 0} };
struct udf_inode_info *iinfo;
if (ctx->pos == 0) {
if (!dir_emit_dot(file, ctx))
return 0;
ctx->pos = 1;
}
nf_pos = (ctx->pos - 1) << 2;
if (nf_pos >= size)
goto out;
@ -71,7 +77,6 @@ static int do_udf_readdir(struct inode *dir, struct file *filp,
nf_pos = udf_ext0_offset(dir);
fibh.soffset = fibh.eoffset = nf_pos & (dir->i_sb->s_blocksize - 1);
iinfo = UDF_I(dir);
if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
if (inode_bmap(dir, nf_pos >> dir->i_sb->s_blocksize_bits,
&epos, &eloc, &elen, &offset)
@ -116,7 +121,9 @@ static int do_udf_readdir(struct inode *dir, struct file *filp,
}
while (nf_pos < size) {
filp->f_pos = (nf_pos >> 2) + 1;
struct kernel_lb_addr tloc;
ctx->pos = (nf_pos >> 2) + 1;
fi = udf_fileident_read(dir, &nf_pos, &fibh, &cfi, &epos, &eloc,
&elen, &offset);
@ -155,24 +162,22 @@ static int do_udf_readdir(struct inode *dir, struct file *filp,
}
if (cfi.fileCharacteristics & FID_FILE_CHAR_PARENT) {
iblock = parent_ino(filp->f_path.dentry);
flen = 2;
memcpy(fname, "..", flen);
dt_type = DT_DIR;
} else {
struct kernel_lb_addr tloc = lelb_to_cpu(cfi.icb.extLocation);
iblock = udf_get_lb_pblock(dir->i_sb, &tloc, 0);
flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
dt_type = DT_UNKNOWN;
if (!dir_emit_dotdot(file, ctx))
goto out;
continue;
}
if (flen && filldir(dirent, fname, flen, filp->f_pos,
iblock, dt_type) < 0)
flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
if (!flen)
continue;
tloc = lelb_to_cpu(cfi.icb.extLocation);
iblock = udf_get_lb_pblock(dir->i_sb, &tloc, 0);
if (!dir_emit(ctx, fname, flen, iblock, DT_UNKNOWN))
goto out;
} /* end while */
filp->f_pos = (nf_pos >> 2) + 1;
ctx->pos = (nf_pos >> 2) + 1;
out:
if (fibh.sbh != fibh.ebh)
@ -184,27 +189,11 @@ out:
return ret;
}
static int udf_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
struct inode *dir = file_inode(filp);
int result;
if (filp->f_pos == 0) {
if (filldir(dirent, ".", 1, filp->f_pos, dir->i_ino, DT_DIR) < 0) {
return 0;
}
filp->f_pos++;
}
result = do_udf_readdir(dir, filp, filldir, dirent);
return result;
}
/* readdir and lookup functions */
const struct file_operations udf_dir_operations = {
.llseek = generic_file_llseek,
.read = generic_read_dir,
.readdir = udf_readdir,
.iterate = udf_readdir,
.unlocked_ioctl = udf_ioctl,
.fsync = generic_file_fsync,
};