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Worked around write checks for ftruncate() and access(W_OK) on OpenIndiana 

When a file is created with no write permissions, ftruncate and
access(W_OK) should be allowed, but this check has to be made by the
file system on OpenIndiana.
This patch is not active on Linux (#ifdef'ed)
edge.strict_endians
Jean-Pierre André 2012-01-23 17:49:38 +01:00
parent b25178fec3
commit 458c5eb191
1 changed files with 61 additions and 0 deletions
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61
src/lowntfs-3g.c
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@ -174,13 +174,21 @@ struct open_file {
fuse_ino_t ino;
fuse_ino_t parent;
int state;
#if defined(__sun) && defined (__SVR4)
pid_t tid;
#endif /* defined(__sun) && defined (__SVR4) */
} ;
enum {
CLOSE_GHOST = 1,
CLOSE_COMPRESSED = 2,
CLOSE_ENCRYPTED = 4,
#if defined(__sun) && defined (__SVR4)
CLOSE_DMTIME = 8,
CLOSE_WRITING = 16
#else /* defined(__sun) && defined (__SVR4) */
CLOSE_DMTIME = 8
#endif /* defined(__sun) && defined (__SVR4) */
};
static struct ntfs_options opts;
@ -1178,6 +1186,31 @@ static void ntfs_fuse_readdir(fuse_req_t req, fuse_ino_t ino, size_t size,
fuse_reply_err(req, -err);
}
#if defined(__sun) && defined (__SVR4)
/*
* When a file is created with a read-only mode,
* access for writing and ftruncating are allowed to the thread
* which is creating.
*/
static BOOL check_open_for_writing(fuse_ino_t ino, pid_t tid)
{
BOOL ok;
struct open_file *of;
ok = FALSE;
of = ctx->open_files;
while (of && (of->ino != ino))
of = of->next;
if (of && (of->state & CLOSE_WRITING) && (of->tid == tid)) {
ok = TRUE;
}
return (ok);
}
#endif /* defined(__sun) && defined (__SVR4) */
static void ntfs_fuse_open(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *fi)
{
@ -1213,6 +1246,9 @@ static void ntfs_fuse_open(fuse_req_t req, fuse_ino_t ino,
#endif
if ((res >= 0)
&& (fi->flags & (O_WRONLY | O_RDWR))) {
#if defined(__sun) && defined (__SVR4)
state |= CLOSE_WRITING;
#endif /* defined(__sun) && defined (__SVR4) */
/* mark a future need to compress the last chunk */
if (na->data_flags & ATTR_COMPRESSION_MASK)
state |= CLOSE_COMPRESSED;
@ -1244,6 +1280,13 @@ static void ntfs_fuse_open(fuse_req_t req, fuse_ino_t ino,
of->parent = 0;
of->ino = ino;
of->state = state;
#if defined(__sun) && defined (__SVR4)
#if !KERNELPERMS | (POSIXACLS & !KERNELACLS)
of->tid = security.tid;
#else
of->tid = fuse_req_ctx(req)->pid;
#endif
#endif /* defined(__sun) && defined (__SVR4) */
of->next = ctx->open_files;
of->previous = (struct open_file*)NULL;
if (ctx->open_files)
@ -1743,8 +1786,14 @@ static void ntfs_fuse_setattr(fuse_req_t req, fuse_ino_t ino, struct stat *attr,
}
/* size */
if (!res && (to_set & FUSE_SET_ATTR_SIZE)) {
#if defined(__sun) && defined (__SVR4)
res = ntfs_fuse_trunc(&security, ino, attr->st_size,
!fi && !check_open_for_writing(ino,
security.tid), &stbuf);
#else
res = ntfs_fuse_trunc(&security, ino, attr->st_size,
!fi, &stbuf);
#endif /* defined(__sun) && defined (__SVR4) */
}
/* some set of atime/mtime */
if (!res && (to_set & (FUSE_SET_ATTR_ATIME + FUSE_SET_ATTR_MTIME))) {
@ -1776,6 +1825,13 @@ static void ntfs_fuse_access(fuse_req_t req, fuse_ino_t ino, int mask)
else
res = -EOPNOTSUPP;
} else {
#if defined(__sun) && defined (__SVR4)
if ((mask & W_OK) && check_open_for_writing(ino,
security.tid)) {
fuse_reply_err(req, 0);
return;
}
#endif /* defined(__sun) && defined (__SVR4) */
ni = ntfs_inode_open(ctx->vol, INODE(ino));
if (!ni) {
res = -errno;
@ -1952,7 +2008,12 @@ exit:
if (of) {
of->parent = 0;
of->ino = e->ino;
#if defined(__sun) && defined (__SVR4)
of->state = state | CLOSE_WRITING;
of->tid = security.tid;
#else /* defined(__sun) && defined (__SVR4) */
of->state = state;
#endif /* defined(__sun) && defined (__SVR4) */
of->next = ctx->open_files;
of->previous = (struct open_file*)NULL;
if (ctx->open_files)