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-rw-r--r--fs/hostfs/hostfs_user.c229
1 files changed, 131 insertions, 98 deletions
diff --git a/fs/hostfs/hostfs_user.c b/fs/hostfs/hostfs_user.c
index 1ed5ea389f1..5625e2481dd 100644
--- a/fs/hostfs/hostfs_user.c
+++ b/fs/hostfs/hostfs_user.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
@@ -21,12 +21,16 @@ int stat_file(const char *path, unsigned long long *inode_out, int *mode_out,
int *nlink_out, int *uid_out, int *gid_out,
unsigned long long *size_out, struct timespec *atime_out,
struct timespec *mtime_out, struct timespec *ctime_out,
- int *blksize_out, unsigned long long *blocks_out)
+ int *blksize_out, unsigned long long *blocks_out, int fd)
{
struct stat64 buf;
- if(lstat64(path, &buf) < 0)
- return(-errno);
+ if(fd >= 0) {
+ if (fstat64(fd, &buf) < 0)
+ return -errno;
+ } else if(lstat64(path, &buf) < 0) {
+ return -errno;
+ }
if(inode_out != NULL) *inode_out = buf.st_ino;
if(mode_out != NULL) *mode_out = buf.st_mode;
@@ -48,7 +52,7 @@ int stat_file(const char *path, unsigned long long *inode_out, int *mode_out,
}
if(blksize_out != NULL) *blksize_out = buf.st_blksize;
if(blocks_out != NULL) *blocks_out = buf.st_blocks;
- return(0);
+ return 0;
}
int file_type(const char *path, int *maj, int *min)
@@ -56,7 +60,7 @@ int file_type(const char *path, int *maj, int *min)
struct stat64 buf;
if(lstat64(path, &buf) < 0)
- return(-errno);
+ return -errno;
/*We cannot pass rdev as is because glibc and the kernel disagree
*about its definition.*/
if(maj != NULL)
@@ -64,13 +68,13 @@ int file_type(const char *path, int *maj, int *min)
if(min != NULL)
*min = minor(buf.st_rdev);
- if(S_ISDIR(buf.st_mode)) return(OS_TYPE_DIR);
- else if(S_ISLNK(buf.st_mode)) return(OS_TYPE_SYMLINK);
- else if(S_ISCHR(buf.st_mode)) return(OS_TYPE_CHARDEV);
- else if(S_ISBLK(buf.st_mode)) return(OS_TYPE_BLOCKDEV);
- else if(S_ISFIFO(buf.st_mode))return(OS_TYPE_FIFO);
- else if(S_ISSOCK(buf.st_mode))return(OS_TYPE_SOCK);
- else return(OS_TYPE_FILE);
+ if(S_ISDIR(buf.st_mode)) return OS_TYPE_DIR;
+ else if(S_ISLNK(buf.st_mode)) return OS_TYPE_SYMLINK;
+ else if(S_ISCHR(buf.st_mode)) return OS_TYPE_CHARDEV;
+ else if(S_ISBLK(buf.st_mode)) return OS_TYPE_BLOCKDEV;
+ else if(S_ISFIFO(buf.st_mode))return OS_TYPE_FIFO;
+ else if(S_ISSOCK(buf.st_mode))return OS_TYPE_SOCK;
+ else return OS_TYPE_FILE;
}
int access_file(char *path, int r, int w, int x)
@@ -80,8 +84,9 @@ int access_file(char *path, int r, int w, int x)
if(r) mode = R_OK;
if(w) mode |= W_OK;
if(x) mode |= X_OK;
- if(access(path, mode) != 0) return(-errno);
- else return(0);
+ if(access(path, mode) != 0)
+ return -errno;
+ else return 0;
}
int open_file(char *path, int r, int w, int append)
@@ -99,8 +104,9 @@ int open_file(char *path, int r, int w, int append)
if(append)
mode |= O_APPEND;
fd = open64(path, mode);
- if(fd < 0) return(-errno);
- else return(fd);
+ if(fd < 0)
+ return -errno;
+ else return fd;
}
void *open_dir(char *path, int *err_out)
@@ -109,8 +115,9 @@ void *open_dir(char *path, int *err_out)
dir = opendir(path);
*err_out = errno;
- if(dir == NULL) return(NULL);
- return(dir);
+ if(dir == NULL)
+ return NULL;
+ return dir;
}
char *read_dir(void *stream, unsigned long long *pos,
@@ -121,11 +128,12 @@ char *read_dir(void *stream, unsigned long long *pos,
seekdir(dir, *pos);
ent = readdir(dir);
- if(ent == NULL) return(NULL);
+ if(ent == NULL)
+ return NULL;
*len_out = strlen(ent->d_name);
*ino_out = ent->d_ino;
*pos = telldir(dir);
- return(ent->d_name);
+ return ent->d_name;
}
int read_file(int fd, unsigned long long *offset, char *buf, int len)
@@ -133,9 +141,10 @@ int read_file(int fd, unsigned long long *offset, char *buf, int len)
int n;
n = pread64(fd, buf, len, *offset);
- if(n < 0) return(-errno);
+ if(n < 0)
+ return -errno;
*offset += n;
- return(n);
+ return n;
}
int write_file(int fd, unsigned long long *offset, const char *buf, int len)
@@ -143,9 +152,10 @@ int write_file(int fd, unsigned long long *offset, const char *buf, int len)
int n;
n = pwrite64(fd, buf, len, *offset);
- if(n < 0) return(-errno);
+ if(n < 0)
+ return -errno;
*offset += n;
- return(n);
+ return n;
}
int lseek_file(int fd, long long offset, int whence)
@@ -154,8 +164,8 @@ int lseek_file(int fd, long long offset, int whence)
ret = lseek64(fd, offset, whence);
if(ret < 0)
- return(-errno);
- return(0);
+ return -errno;
+ return 0;
}
int fsync_file(int fd, int datasync)
@@ -198,65 +208,90 @@ int file_create(char *name, int ur, int uw, int ux, int gr,
mode |= ox ? S_IXOTH : 0;
fd = open64(name, O_CREAT | O_RDWR, mode);
if(fd < 0)
- return(-errno);
- return(fd);
+ return -errno;
+ return fd;
}
-int set_attr(const char *file, struct hostfs_iattr *attrs)
+int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
{
- struct utimbuf buf;
+ struct timeval times[2];
+ struct timespec atime_ts, mtime_ts;
int err, ma;
- if(attrs->ia_valid & HOSTFS_ATTR_MODE){
- if(chmod(file, attrs->ia_mode) != 0) return(-errno);
- }
- if(attrs->ia_valid & HOSTFS_ATTR_UID){
- if(chown(file, attrs->ia_uid, -1)) return(-errno);
+ if (attrs->ia_valid & HOSTFS_ATTR_MODE) {
+ if (fd >= 0) {
+ if (fchmod(fd, attrs->ia_mode) != 0)
+ return (-errno);
+ } else if (chmod(file, attrs->ia_mode) != 0) {
+ return -errno;
+ }
}
- if(attrs->ia_valid & HOSTFS_ATTR_GID){
- if(chown(file, -1, attrs->ia_gid)) return(-errno);
+ if (attrs->ia_valid & HOSTFS_ATTR_UID) {
+ if (fd >= 0) {
+ if (fchown(fd, attrs->ia_uid, -1))
+ return -errno;
+ } else if(chown(file, attrs->ia_uid, -1)) {
+ return -errno;
+ }
}
- if(attrs->ia_valid & HOSTFS_ATTR_SIZE){
- if(truncate(file, attrs->ia_size)) return(-errno);
+ if (attrs->ia_valid & HOSTFS_ATTR_GID) {
+ if (fd >= 0) {
+ if (fchown(fd, -1, attrs->ia_gid))
+ return -errno;
+ } else if (chown(file, -1, attrs->ia_gid)) {
+ return -errno;
+ }
}
- ma = HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET;
- if((attrs->ia_valid & ma) == ma){
- buf.actime = attrs->ia_atime.tv_sec;
- buf.modtime = attrs->ia_mtime.tv_sec;
- if(utime(file, &buf) != 0) return(-errno);
+ if (attrs->ia_valid & HOSTFS_ATTR_SIZE) {
+ if (fd >= 0) {
+ if (ftruncate(fd, attrs->ia_size))
+ return -errno;
+ } else if (truncate(file, attrs->ia_size)) {
+ return -errno;
+ }
}
- else {
- struct timespec ts;
-
- if(attrs->ia_valid & HOSTFS_ATTR_ATIME_SET){
- err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, &ts, NULL, NULL, NULL);
- if(err != 0)
- return(err);
- buf.actime = attrs->ia_atime.tv_sec;
- buf.modtime = ts.tv_sec;
- if(utime(file, &buf) != 0)
- return(-errno);
+
+ /* Update accessed and/or modified time, in two parts: first set
+ * times according to the changes to perform, and then call futimes()
+ * or utimes() to apply them. */
+ ma = (HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET);
+ if (attrs->ia_valid & ma) {
+ err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
+ &atime_ts, &mtime_ts, NULL, NULL, NULL, fd);
+ if (err != 0)
+ return err;
+
+ times[0].tv_sec = atime_ts.tv_sec;
+ times[0].tv_usec = atime_ts.tv_nsec * 1000;
+ times[1].tv_sec = mtime_ts.tv_sec;
+ times[1].tv_usec = mtime_ts.tv_nsec * 1000;
+
+ if (attrs->ia_valid & HOSTFS_ATTR_ATIME_SET) {
+ times[0].tv_sec = attrs->ia_atime.tv_sec;
+ times[0].tv_usec = attrs->ia_atime.tv_nsec * 1000;
+ }
+ if (attrs->ia_valid & HOSTFS_ATTR_MTIME_SET) {
+ times[1].tv_sec = attrs->ia_mtime.tv_sec;
+ times[1].tv_usec = attrs->ia_mtime.tv_nsec * 1000;
}
- if(attrs->ia_valid & HOSTFS_ATTR_MTIME_SET){
- err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
- NULL, &ts, NULL, NULL, NULL, NULL);
- if(err != 0)
- return(err);
- buf.actime = ts.tv_sec;
- buf.modtime = attrs->ia_mtime.tv_sec;
- if(utime(file, &buf) != 0)
- return(-errno);
+
+ if (fd >= 0) {
+ if (futimes(fd, times) != 0)
+ return -errno;
+ } else if (utimes(file, times) != 0) {
+ return -errno;
}
}
+
if(attrs->ia_valid & HOSTFS_ATTR_CTIME) ;
if(attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)){
err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
&attrs->ia_atime, &attrs->ia_mtime, NULL,
- NULL, NULL);
- if(err != 0) return(err);
+ NULL, NULL, fd);
+ if(err != 0)
+ return err;
}
- return(0);
+ return 0;
}
int make_symlink(const char *from, const char *to)
@@ -264,8 +299,9 @@ int make_symlink(const char *from, const char *to)
int err;
err = symlink(to, from);
- if(err) return(-errno);
- return(0);
+ if(err)
+ return -errno;
+ return 0;
}
int unlink_file(const char *file)
@@ -273,8 +309,9 @@ int unlink_file(const char *file)
int err;
err = unlink(file);
- if(err) return(-errno);
- return(0);
+ if(err)
+ return -errno;
+ return 0;
}
int do_mkdir(const char *file, int mode)
@@ -282,8 +319,9 @@ int do_mkdir(const char *file, int mode)
int err;
err = mkdir(file, mode);
- if(err) return(-errno);
- return(0);
+ if(err)
+ return -errno;
+ return 0;
}
int do_rmdir(const char *file)
@@ -291,8 +329,9 @@ int do_rmdir(const char *file)
int err;
err = rmdir(file);
- if(err) return(-errno);
- return(0);
+ if(err)
+ return -errno;
+ return 0;
}
int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
@@ -300,8 +339,9 @@ int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
int err;
err = mknod(file, mode, makedev(major, minor));
- if(err) return(-errno);
- return(0);
+ if(err)
+ return -errno;
+ return 0;
}
int link_file(const char *to, const char *from)
@@ -309,8 +349,9 @@ int link_file(const char *to, const char *from)
int err;
err = link(to, from);
- if(err) return(-errno);
- return(0);
+ if(err)
+ return -errno;
+ return 0;
}
int do_readlink(char *file, char *buf, int size)
@@ -319,10 +360,10 @@ int do_readlink(char *file, char *buf, int size)
n = readlink(file, buf, size);
if(n < 0)
- return(-errno);
+ return -errno;
if(n < size)
buf[n] = '\0';
- return(n);
+ return n;
}
int rename_file(char *from, char *to)
@@ -330,8 +371,9 @@ int rename_file(char *from, char *to)
int err;
err = rename(from, to);
- if(err < 0) return(-errno);
- return(0);
+ if(err < 0)
+ return -errno;
+ return 0;
}
int do_statfs(char *root, long *bsize_out, long long *blocks_out,
@@ -344,7 +386,9 @@ int do_statfs(char *root, long *bsize_out, long long *blocks_out,
int err;
err = statfs64(root, &buf);
- if(err < 0) return(-errno);
+ if(err < 0)
+ return -errno;
+
*bsize_out = buf.f_bsize;
*blocks_out = buf.f_blocks;
*bfree_out = buf.f_bfree;
@@ -360,16 +404,5 @@ int do_statfs(char *root, long *bsize_out, long long *blocks_out,
spare_out[2] = buf.f_spare[2];
spare_out[3] = buf.f_spare[3];
spare_out[4] = buf.f_spare[4];
- return(0);
+ return 0;
}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-22 16:10:10 +0000