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virtio-9p: Add fidtype so that we can do type specific operation

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We want to add type specific operation during read/write

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Aneesh Kumar K.V 2010-09-02 11:09:06 +05:30
parent 771e9d4c1c
commit d62dbb51f7
2 changed files with 78 additions and 56 deletions
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108
hw/virtio-9p.c
View File

@ -408,8 +408,7 @@ static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
f = qemu_mallocz(sizeof(V9fsFidState));
f->fid = fid;
f->fd = -1;
f->dir = NULL;
f->fid_type = P9_FID_NONE;
f->next = s->fid_list;
s->fid_list = f;
@ -434,11 +433,14 @@ static int free_fid(V9fsState *s, int32_t fid)
fidp = *fidpp;
*fidpp = fidp->next;
if (fidp->fd != -1) {
v9fs_do_close(s, fidp->fd);
if (fidp->fid_type == P9_FID_FILE) {
v9fs_do_close(s, fidp->fs.fd);
} else if (fidp->fid_type == P9_FID_DIR) {
v9fs_do_closedir(s, fidp->fs.dir);
} else if (fidp->fid_type == P9_FID_XATTR) {
if (fidp->fs.xattr.value) {
qemu_free(fidp->fs.xattr.value);
}
if (fidp->dir) {
v9fs_do_closedir(s, fidp->dir);
}
v9fs_string_free(&fidp->path);
qemu_free(fidp);
@ -1519,8 +1521,7 @@ static void v9fs_walk(V9fsState *s, V9fsPDU *pdu)
/* FIXME: is this really valid? */
if (fid == newfid) {
BUG_ON(vs->fidp->fd != -1);
BUG_ON(vs->fidp->dir);
BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
v9fs_string_init(&vs->path);
vs->name_idx = 0;
@ -1584,11 +1585,11 @@ static int32_t get_iounit(V9fsState *s, V9fsString *name)
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err)
{
if (vs->fidp->dir == NULL) {
if (vs->fidp->fs.dir == NULL) {
err = -errno;
goto out;
}
vs->fidp->fid_type = P9_FID_DIR;
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0);
err = vs->offset;
out:
@ -1608,11 +1609,11 @@ static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs)
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err)
{
if (vs->fidp->fd == -1) {
if (vs->fidp->fs.fd == -1) {
err = -errno;
goto out;
}
vs->fidp->fid_type = P9_FID_FILE;
vs->iounit = get_iounit(s, &vs->fidp->path);
v9fs_open_post_getiounit(s, vs);
return;
@ -1642,7 +1643,7 @@ static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err)
stat_to_qid(&vs->stbuf, &vs->qid);
if (S_ISDIR(vs->stbuf.st_mode)) {
vs->fidp->dir = v9fs_do_opendir(s, &vs->fidp->path);
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path);
v9fs_open_post_opendir(s, vs, err);
} else {
if (s->proto_version == V9FS_PROTO_2000L) {
@ -1654,7 +1655,7 @@ static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err)
} else {
flags = omode_to_uflags(vs->mode);
}
vs->fidp->fd = v9fs_do_open(s, &vs->fidp->path, flags);
vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags);
v9fs_open_post_open(s, vs, err);
}
return;
@ -1686,8 +1687,7 @@ static void v9fs_open(V9fsState *s, V9fsPDU *pdu)
goto out;
}
BUG_ON(vs->fidp->fd != -1);
BUG_ON(vs->fidp->dir);
BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
@ -1707,6 +1707,8 @@ static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err)
&vs->iounit);
err = vs->offset;
} else {
vs->fidp->fid_type = P9_FID_NONE;
close(vs->fidp->fs.fd);
err = -errno;
}
@ -1732,10 +1734,11 @@ out:
static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs,
int err)
{
if (vs->fidp->fd == -1) {
if (vs->fidp->fs.fd == -1) {
err = -errno;
goto out;
}
vs->fidp->fid_type = P9_FID_FILE;
vs->iounit = get_iounit(s, &vs->fullname);
v9fs_lcreate_post_get_iounit(s, vs, err);
return;
@ -1769,7 +1772,7 @@ static void v9fs_lcreate(V9fsState *s, V9fsPDU *pdu)
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
vs->name.data);
vs->fidp->fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
gid, flags, mode);
v9fs_lcreate_post_do_open2(s, vs, err);
return;
@ -1833,7 +1836,7 @@ static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs,
&vs->v9stat);
if ((vs->len != (vs->v9stat.size + 2)) ||
((vs->count + vs->len) > vs->max_count)) {
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos);
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
v9fs_read_post_seekdir(s, vs, err);
return;
}
@ -1841,11 +1844,11 @@ static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs,
v9fs_stat_free(&vs->v9stat);
v9fs_string_free(&vs->name);
vs->dir_pos = vs->dent->d_off;
vs->dent = v9fs_do_readdir(s, vs->fidp->dir);
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
v9fs_read_post_readdir(s, vs, err);
return;
out:
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos);
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
v9fs_read_post_seekdir(s, vs, err);
return;
@ -1873,7 +1876,7 @@ static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err)
{
vs->dent = v9fs_do_readdir(s, vs->fidp->dir);
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
v9fs_read_post_readdir(s, vs, err);
return;
}
@ -1881,7 +1884,7 @@ static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err)
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs,
ssize_t err)
{
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->dir);
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir);
v9fs_read_post_telldir(s, vs, err);
return;
}
@ -1900,7 +1903,7 @@ static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err)
if (0) {
print_sg(vs->sg, vs->cnt);
}
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt);
vs->len = v9fs_do_readv(s, vs->fidp->fs.fd, vs->sg, vs->cnt);
} while (vs->len == -1 && errno == EINTR);
if (vs->len == -1) {
err = -errno;
@ -1930,7 +1933,7 @@ static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err)
if (0) {
print_sg(vs->sg, vs->cnt);
}
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt);
vs->len = v9fs_do_readv(s, vs->fidp->fs.fd, vs->sg, vs->cnt);
} while (vs->len == -1 && errno == EINTR);
if (vs->len == -1) {
err = -errno;
@ -1964,18 +1967,18 @@ static void v9fs_read(V9fsState *s, V9fsPDU *pdu)
goto out;
}
if (vs->fidp->dir) {
if (vs->fidp->fs.dir) {
vs->max_count = vs->count;
vs->count = 0;
if (vs->off == 0) {
v9fs_do_rewinddir(s, vs->fidp->dir);
v9fs_do_rewinddir(s, vs->fidp->fs.dir);
}
v9fs_read_post_rewinddir(s, vs, err);
return;
} else if (vs->fidp->fd != -1) {
} else if (vs->fidp->fs.fd != -1) {
vs->sg = vs->iov;
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt);
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET);
err = v9fs_do_lseek(s, vs->fidp->fs.fd, vs->off, SEEK_SET);
v9fs_read_post_lseek(s, vs, err);
return;
} else {
@ -2024,7 +2027,7 @@ static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs)
if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) {
/* Ran out of buffer. Set dir back to old position and return */
v9fs_do_seekdir(s, vs->fidp->dir, vs->saved_dir_pos);
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->saved_dir_pos);
v9fs_readdir_post_seekdir(s, vs);
return;
}
@ -2045,7 +2048,7 @@ static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs)
vs->count += len;
v9fs_string_free(&vs->name);
vs->saved_dir_pos = vs->dent->d_off;
vs->dent = v9fs_do_readdir(s, vs->fidp->dir);
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
v9fs_readdir_post_readdir(s, vs);
return;
}
@ -2059,14 +2062,14 @@ static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs)
static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs)
{
vs->dent = v9fs_do_readdir(s, vs->fidp->dir);
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
v9fs_readdir_post_readdir(s, vs);
return;
}
static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs)
{
vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->dir);
vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir);
v9fs_readdir_post_telldir(s, vs);
return;
}
@ -2087,15 +2090,15 @@ static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu)
&vs->max_count);
vs->fidp = lookup_fid(s, fid);
if (vs->fidp == NULL || !(vs->fidp->dir)) {
if (vs->fidp == NULL || !(vs->fidp->fs.dir)) {
err = -EINVAL;
goto out;
}
if (vs->initial_offset == 0) {
v9fs_do_rewinddir(s, vs->fidp->dir);
v9fs_do_rewinddir(s, vs->fidp->fs.dir);
} else {
v9fs_do_seekdir(s, vs->fidp->dir, vs->initial_offset);
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->initial_offset);
}
v9fs_readdir_post_setdir(s, vs);
@ -2122,7 +2125,7 @@ static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs,
if (0) {
print_sg(vs->sg, vs->cnt);
}
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt);
vs->len = v9fs_do_writev(s, vs->fidp->fs.fd, vs->sg, vs->cnt);
} while (vs->len == -1 && errno == EINTR);
if (vs->len == -1) {
err = -errno;
@ -2151,7 +2154,7 @@ static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err)
if (0) {
print_sg(vs->sg, vs->cnt);
}
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt);
vs->len = v9fs_do_writev(s, vs->fidp->fs.fd, vs->sg, vs->cnt);
} while (vs->len == -1 && errno == EINTR);
if (vs->len == -1) {
err = -errno;
@ -2188,12 +2191,12 @@ static void v9fs_write(V9fsState *s, V9fsPDU *pdu)
goto out;
}
if (vs->fidp->fd == -1) {
if (vs->fidp->fs.fd == -1) {
err = -EINVAL;
goto out;
}
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET);
err = v9fs_do_lseek(s, vs->fidp->fs.fd, vs->off, SEEK_SET);
v9fs_write_post_lseek(s, vs, err);
return;
@ -2245,9 +2248,10 @@ static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err)
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs,
int err)
{
if (!vs->fidp->dir) {
if (!vs->fidp->fs.dir) {
err = -errno;
}
vs->fidp->fid_type = P9_FID_DIR;
v9fs_post_create(s, vs, err);
}
@ -2259,7 +2263,7 @@ static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs,
goto out;
}
vs->fidp->dir = v9fs_do_opendir(s, &vs->fullname);
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname);
v9fs_create_post_opendir(s, vs, err);
return;
@ -2285,22 +2289,22 @@ out:
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err)
{
if (err) {
vs->fidp->fd = -1;
vs->fidp->fid_type = P9_FID_NONE;
close(vs->fidp->fs.fd);
err = -errno;
}
v9fs_post_create(s, vs, err);
return;
}
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err)
{
if (vs->fidp->fd == -1) {
if (vs->fidp->fs.fd == -1) {
err = -errno;
goto out;
}
err = v9fs_do_fstat(s, vs->fidp->fd, &vs->stbuf);
vs->fidp->fid_type = P9_FID_FILE;
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
v9fs_create_post_fstat(s, vs, err);
return;
@ -2371,7 +2375,7 @@ static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err)
0, vs->fidp->uid, -1);
v9fs_post_create(s, vs, err);
} else {
vs->fidp->fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
-1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
v9fs_create_post_open2(s, vs, err);
@ -2615,8 +2619,7 @@ static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs)
goto out;
}
BUG_ON(dirfidp->fd != -1);
BUG_ON(dirfidp->dir);
BUG_ON(dirfidp->fid_type != P9_FID_NONE);
new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2);
@ -2727,8 +2730,7 @@ static void v9fs_rename(V9fsState *s, V9fsPDU *pdu)
goto out;
}
BUG_ON(vs->fidp->fd != -1);
BUG_ON(vs->fidp->dir);
BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
err = v9fs_complete_rename(s, vs);
v9fs_rename_post_rename(s, vs, err);
@ -2855,7 +2857,7 @@ static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu)
/* do we need to sync the file? */
if (donttouch_stat(&vs->v9stat)) {
err = v9fs_do_fsync(s, vs->fidp->fd);
err = v9fs_do_fsync(s, vs->fidp->fs.fd);
v9fs_wstat_post_fsync(s, vs, err);
return;
}

20
hw/virtio-9p.h
View File

@ -155,12 +155,32 @@ typedef struct V9fsStat
int32_t n_muid;
} V9fsStat;
enum {
P9_FID_NONE = 0,
P9_FID_FILE,
P9_FID_DIR,
P9_FID_XATTR,
};
typedef struct V9fsXattr
{
int64_t copied_len;
int64_t len;
void *value;
V9fsString name;
int flags;
} V9fsXattr;
struct V9fsFidState
{
int fid_type;
int32_t fid;
V9fsString path;
union {
int fd;
DIR *dir;
V9fsXattr xattr;
} fs;
uid_t uid;
V9fsFidState *next;
};